CN110745044B - Device for adjusting damping force and height, seat and vehicle suspension system - Google Patents

Abstract

The invention discloses a damping force and height adjusting device, a seat and a vehicle suspension system. The device for adjusting the damping force and the height comprises an adjusting valve which is respectively connected with a gas source, the atmosphere, an air spring and a damping force adjusting device of a damping element, wherein the adjusting valve comprises a first cylinder and at least one first control rod which is slidably arranged in the first cylinder, and the air spring is in gas flow connection with the gas source or the atmosphere through the relative displacement of the first control rod and the first cylinder relative to each other so as to realize the height adjustment of the air spring; and/or the damping force adjusting device of the damping element is connected with the air source and the air in an air flow way, so that the damping force adjusting device of the air-driven damping element performs corresponding operation to control the damping element to output corresponding damping force, and the damping force of the damping element is adjusted. It can be seen that the present invention achieves damping force and height adjustment.

Description

Device for adjusting damping force and height, seat and vehicle suspension system

Technical Field

The invention relates to the field of shock absorbers, and in particular to a device for adjusting damping force and height, a seat and a vehicle suspension system.

Background technique

The existing suspension system mainly includes two control systems, height adjustment and damping force adjustment. These two control systems are independent systems and have corresponding control mechanisms. In the manual adjustment mode, it is necessary to press two buttons at the same time to achieve the synchronous adjustment of the two control systems, which is inconvenient to operate. In the electronic control mode, the suspension control system based on the CDC damper (CDC, Continuous Damping Control) is more commonly used. The suspension control system first uses sensors to collect information and sends the collected information to the electronic control unit. The electronic control unit simultaneously calculates the air pressure in the air spring airbag and the damping force of the damper, and sends the calculated control signal to the air spring and the CDC damper at the same time, controlling the air spring and the CDC damper to perform corresponding operations at the same time, thereby achieving the height adjustment and damping force adjustment of the suspension system. Although this suspension control system can well improve the stability and comfort of the suspension system, the electronic components in the suspension control system are easily restricted by the installation position during actual application, making the control accuracy not accurate enough and the installation and maintenance inconvenient; in addition, the electronic components are easily restricted by the space of the suspension system itself in the line layout, and the cost of the suspension control system is high, so that the suspension control system has not been widely used.

To this end, the present application proposes a purely mechanical mechanism to synchronously achieve height adjustment and damping force adjustment of the suspension system.

Summary of the invention

In view of the above problems, the present invention is proposed to provide a device for adjusting damping force and height, a seat and a vehicle suspension system that overcome the above problems or at least partially solve the above problems.

According to one aspect of the present invention, there is provided a device for adjusting damping force and height, the device for adjusting damping force and height comprising a regulating valve, the regulating valve being respectively connected to an air source, the atmosphere, an air spring and a damping force regulating device of a damping element;

The regulating valve includes a first cylinder and at least one first control rod slidably arranged in the first cylinder. Through the relative displacement of the first control rod and the first cylinder relative to each other, a gas flow connection is generated between the air spring and the air source or the atmosphere, thereby realizing the height adjustment of the air spring; and/or, the damping force adjustment device of the damping element is connected to the gas flow between the air source and the atmosphere, so that the damping force adjustment device of the damping element is air-driven to perform corresponding operations to control the damping element to output the corresponding damping force, thereby realizing the adjustment of the damping force of the damping element.

According to another aspect of the present invention, a seat is provided, the seat having at least two scissor frame structures that move relative to each other, at least one damping element for shock absorption and an air spring for height adjustment, the seat also comprising a damping force adjustment device for the damping element and a device for adjusting the damping force and height as described above, the positions of the damping element, the air spring, the damping force adjustment device for the damping element and the device for adjusting the damping force and height being adapted to each other, the device for adjusting the damping force and height being connected to the damping force adjustment device for the damping element and the air spring respectively;

One end of the device for adjusting the damping force and height is connected to one of the scissor frame structures, and the other end of the device for adjusting the damping force and height is connected to the other scissor frame structure. The relative movement of the two relatively moving scissor frame structures drives the device for adjusting the damping force and height to control the inflation or deflation of the air spring, or the relative movement of the two relatively moving scissor frame structures drives the device for adjusting the damping force and height to control the damping force adjustment device of the damping element to perform corresponding operations, thereby realizing seat damping force adjustment.

According to another aspect of the present invention, a vehicle suspension system is provided, the vehicle suspension system includes a vehicle body and at least four wheels, at least two damping elements for shock absorption and an air spring for height adjustment are arranged between the vehicle body and the wheels, the vehicle suspension system also includes a damping force adjustment device of the damping element and a device for adjusting the damping force and height as described above, the positions of the damping element, the air spring, the damping force adjustment device of the damping element and the device for adjusting the damping force and height are adapted to each other, and the device for adjusting the damping force and height is respectively connected to the damping force adjustment device of the damping element and the air spring.

The beneficial effects of the present invention are as follows: the damping force and height adjustment device claimed in the present invention can control the inflation or deflation of the air spring to achieve height adjustment through the relative displacement of the first control rod and the first cylinder relative to each other, and can also simultaneously drive the damping force adjustment device of the damping element to perform corresponding operations to control the damping element to output the corresponding damping force, thereby achieving damping force adjustment, that is, achieving height adjustment of the suspension system or synchronously achieving height adjustment and damping force adjustment of the suspension system, so that the shock absorption effect reaches the best state. Compared with the prior art that realizes synchronous adjustment of height and damping force by electronic control, the technical solution of the present invention improves the sensitivity of height adjustment and damping force adjustment, and further improves comfort; in addition, the technical solution of the present invention eliminates the need for the driver to manually adjust the damping force and height during driving, so that the driver's attention is more concentrated, and the occurrence of traffic accidents can be reduced to a certain extent; and the technical solution of the present invention is composed of a linear structure, which is adapted to the height of the suspension system, is not limited by the space and installation position of the suspension system itself, is easy to install, has a low failure rate, is convenient to maintain, and has a low cost.

The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below.

BRIEF DESCRIPTION OF THE DRAWINGS

Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

FIG1 shows a perspective view of a device for adjusting damping force and height according to one embodiment of the present invention;

FIG2 shows a two-dimensional diagram of a device for adjusting damping force and height according to one embodiment of the present invention;

FIG3 shows a first cross-sectional view of a device for adjusting damping force and height according to an embodiment of the present invention;

FIG4 shows a second cross-sectional view of a device for adjusting damping force and height according to an embodiment of the present invention;

FIG5 shows a perspective view of a control rod according to an embodiment of the present invention;

FIG6 shows a perspective view of another control rod according to an embodiment of the present invention;

FIG7( a) shows a cross-sectional view of another device for adjusting damping force and height according to an embodiment of the present invention in a first working state;

FIG7( b) is a cross-sectional view showing a second working state of another device for adjusting damping force and height according to an embodiment of the present invention;

FIG8 shows a perspective view of yet another device for adjusting damping force and height according to an embodiment of the present invention;

FIG9 shows an exploded view of yet another device for adjusting damping force and height according to an embodiment of the present invention;

FIG10( a) is a cross-sectional view showing a first working state of yet another device for adjusting damping force and height according to an embodiment of the present invention;

FIG10( b) is a cross-sectional view showing a second working state of yet another device for adjusting damping force and height according to an embodiment of the present invention;

FIG11 shows a perspective view of yet another device for adjusting damping force and height according to an embodiment of the present invention;

FIG12 shows an exploded view of yet another device for adjusting damping force and height according to an embodiment of the present invention;

FIG13 is a schematic diagram showing the functional structure of a seat according to an embodiment of the present invention;

Description of the drawings: a device 10 for adjusting damping force and height; an air spring 20; a damping element 40; a scissor frame structure (50, 60); a regulating valve A; a first cylinder A100; a first air inlet A110; a second air inlet A120; a first air outlet A130; a second air outlet A140; a third air outlet A150; a first exhaust port A160; a second exhaust port A170; a first control rod A200; a first portion A210; a second portion A220; a first axial groove (A221, A223); an end region A222; a first end region A2221; a second end region A2222; a second axial groove (A2221-1, A2222-1); a seal Sealing element A300; first sealing element A310; second sealing element A320; third sealing element A330; fourth sealing element A340; gas chamber A400; first gas chamber A410; second gas chamber A420; third gas chamber A430; fourth gas chamber A440; fifth gas chamber A450; gas compression device B; second cylinder B100; second control rod B200; guide block B300; guide device C; guide ring groove (C110, C221); guide rod (C120, C230); guide plate C210; guide groove C220; guide groove C222; guide slide groove (C200, C300); fixing device D.

Detailed ways

The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

Embodiment 1

Figure 1 shows a stereoscopic view of a device for adjusting damping force and height according to an embodiment of the present invention. As shown in Figure 1, the device 10 for adjusting damping force and height includes a regulating valve A, which is respectively connected to an air source, atmosphere, an air spring and a damping force regulating device of a damping element; the regulating valve A includes a first cylinder A100 and at least one first control rod A200 slidably arranged in the first cylinder A100, and through the relative displacement of the first control rod A100 and the first cylinder A100 relative to each other, a gas flow connection is generated between the air spring and the air source or the atmosphere, thereby realizing height adjustment of the air spring; and/or, the damping force regulating device of the damping element is connected to the gas flow between the air source and the atmosphere, so that the damping force regulating device of the air-driven damping element performs corresponding operations to control the damping element to output a corresponding damping force, thereby realizing adjustment of the damping force size of the damping element.

It should be noted that the damping force adjustment device of the damping element includes a device for controlling the swing direction and swing amplitude of the adjustment pin of the damping element. In this application, such a device is referred to as a driving device for the adjustment pin of the damping element. The driving device for the adjustment pin of the damping element mainly includes the following two structures:

The driving device of the regulating pin of the first damping element includes a gas compression device (such as a cylinder) and a wire control device with a return spring, wherein the regulating valve A is connected to the gas compression device, and the gas compression device is connected to the regulating pin of the damping element through the wire control device. In the process of relative displacement between the first control rod A100 and the first cylinder A100 of the regulating valve A, the gas mass flow rate inside the regulating valve A itself changes to drive the state quantity of the gas information inside the gas compression device and the frequency of the change of the state quantity, thereby changing the working stroke size of the gas compression device. When the working stroke of the gas compression device becomes larger, the driving force of the wire control device becomes larger; when the working stroke of the gas compression device becomes smaller, the driving force of the wire control device becomes smaller. Of course, the opposite setting can also be made. The application does not further limit the corresponding relationship between the working stroke of the gas compression device and the driving force of the wire control device. Since the return force of the wire control device is provided by the return spring, the return force of the wire control device is linearly related to the driving force of the wire control device without changing the return spring. Therefore, by changing the working stroke of the gas compression device, the matching relationship between the driving force and the return force of the pull wire control device can be adjusted, thereby driving the adjusting pin of the damping element to swing back and forth, that is, driving the swing direction and swing amplitude of the adjusting pin of the damping element, controlling the damping element to output the corresponding damping force, and realizing the adjustment of the damping force.

The driving device of the regulating pin of the second damping element includes a gas compression device (such as a cylinder), the driving rod of the gas compression device is directly connected to the regulating pin of the damping element, and the regulating valve A is pneumatically connected to the gas compression device. In the process of relative displacement between the first control rod A100 and the first cylinder A100 of the regulating valve A, the gas mass flow rate inside the regulating valve A itself changes to drive the state quantity of the gas information inside the gas compression device and the frequency of the change of the state quantity, so that the relative displacement between the driving rod of the gas compression device and the cylinder changes, so that the driving rod of the gas compression device drives the regulating pin of the damping element to swing back and forth, that is, drives the swing direction and swing amplitude of the regulating pin of the damping element, controls the damping element to output the corresponding damping force, and realizes the adjustment of the damping force.

In addition, the damping force regulating device of the damping element also includes a proportional valve, which is connected to the valve port of the damping liquid circulation chamber of the damping element. The regulating valve A is pneumatically connected to the proportional valve. During the relative displacement of the first control rod A100 and the first cylinder A100 of the regulating valve A relative to each other, the gas mass flow rate inside the regulating valve A changes to drive the working stroke of the proportional valve to change, thereby controlling the diameter of the valve port of the damping liquid circulation chamber of the damping element. For example, when the working stroke of the proportional valve increases, the diameter of the valve port of the damping liquid circulation chamber of the damping element decreases. The opposite setting can also be performed. The corresponding relationship between the working stroke of the proportional valve and the diameter of the valve port of the damping liquid circulation chamber of the damping element is not further limited in this application. By controlling the diameter of the valve port of the damping liquid circulation chamber of the damping element, the purpose of controlling the damping liquid flow rate, damping liquid flow rate, or damping liquid flow rate and damping liquid flow rate of the damping element is achieved, and finally the damping element is controlled to output the corresponding damping force to achieve damping force regulation.

It should be further explained that the damping elements in the present application include CDC dampers and PDC dampers (PDC, Pneumatic Damping Control), etc. The present application does not further limit the type of damping elements, and only requires that the damping force of the damping element is adjustable. In addition, the above content only lists and explains the structure of the damping force adjustment device of the damping element, and other adjustment devices that can adjust the damping force of the damping element are within the protection scope of the present application.

It can be seen that the damping force and height adjustment device claimed in the present invention can control the inflation or deflation of the air spring to achieve height adjustment through the relative displacement of the first control rod and the first cylinder relative to each other, and can also simultaneously drive the damping force adjustment device of the damping element to perform corresponding operations to control the damping element to output the corresponding damping force to achieve damping force adjustment, that is, to achieve height adjustment of the suspension system or to achieve height adjustment and damping force adjustment of the suspension system simultaneously, so that the shock absorption effect reaches the best state. Compared with the prior art that achieves synchronous adjustment of height and damping force by electronic control, the technical solution of the present invention improves the sensitivity of height adjustment and damping force adjustment, and further improves comfort; in addition, the technical solution of the present invention eliminates the need for the driver to manually adjust the damping force and height during driving, so that the driver's attention is more concentrated, and the occurrence of traffic accidents can be reduced to a certain extent; and the technical solution of the present invention is composed of a linear structure, which is adapted to the height of the suspension system, is not limited by the space and installation position of the suspension system itself, is easy to install, has a low failure rate, is convenient to maintain, and has a low cost.

Further, the working stroke of the regulating valve A includes at least three displacement threshold ranges, wherein the second displacement threshold range includes the first displacement threshold range, and the third displacement threshold range includes the second displacement threshold range;

The regulating valve A comprises a first cylinder A100 and at least one first control rod A200 slidably arranged in the first cylinder A100. When the first cylinder A100 and the first control rod A200 generate different relative displacements relative to each other, the regulating valve mainly has the following three suspension working modes:

In the first suspension working mode, when the relative displacement of the first cylinder A100 and the first control rod A200 relative to each other is within the first displacement threshold range, the regulating valve A does not generate a gas flow connection, that is, no gas flow connection is generated between the air spring and the air source or the atmosphere, and no gas flow connection is generated between the damping force adjustment device of the damping element and the air source and the atmosphere. In this case, the air spring is neither inflated nor deflated, and the damping force of the damping element maintains the preset basic damping force.

In the second suspension working mode, when the relative displacement of the first cylinder A100 and the first control rod A200 relative to each other is between the first displacement threshold range and the second displacement threshold range, the air spring is connected to the air source by gas flow, and the air spring is inflated, or the air spring is connected to the atmosphere by gas flow, and the air spring is deflated. In this case, only the height of the air spring is adjusted, and the damping force of the damping element still maintains the preset basic damping force.

For example, when the relative displacement of the first cylinder A100 and the first control rod A200 relative to each other is from the upper limit value of the first displacement threshold range to the upper limit value of the second displacement threshold range, a gas flow connection is generated between the air spring and the atmosphere, thereby achieving deflation of the air spring; or, when the relative displacement of the first cylinder A100 and the first control rod A200 relative to each other is from the lower limit value of the first displacement threshold range to the lower limit value of the second displacement threshold range, a gas flow connection is generated between the air spring and the air source, thereby achieving inflation of the air spring.

In the third suspension working mode, when the relative displacement of the first cylinder A100 and the first control rod A200 relative to each other is between the second displacement threshold range and the third displacement threshold range, the damping force adjustment device of the damping element is connected to the gas flow between the gas source and the atmosphere, so that the gas mass flow inside the damping force adjustment device of the damping element changes, so that the damping force adjustment device of the gas-driven damping element performs corresponding operations to control the damping element to output the corresponding damping force, and realizes the adjustment of the damping force of the damping element, and the air spring is connected to the gas source or the atmosphere to realize the inflation or deflation of the air spring. In this case, the height of the air spring and the damping force of the damping element are adjusted synchronously.

For example, in the process of the relative displacement of the first cylinder A100 and the first control rod A200 relative to each other from the upper limit value of the second displacement threshold range to the upper limit value of the third displacement threshold range, a gas flow connection is generated between the air spring and the atmosphere, and the air spring is deflated, and the damping force adjustment device of the damping element is connected to the gas flow between the gas source and the atmosphere, so that the gas mass flow rate inside the damping force adjustment device of the damping element changes, so that the damping force adjustment device of the air-driven damping element performs a corresponding operation to control the increase in the damping force of the damping element; or, in the process of the relative displacement of the first cylinder A100 and the first control rod A200 relative to each other from the lower limit value of the second displacement threshold range to the lower limit value of the third displacement threshold range, a gas flow connection is generated between the air spring and the gas source, and the air spring is inflated, and the damping force adjustment device of the damping element is connected to the gas flow between the gas source and the atmosphere, so that the gas mass flow rate inside the damping force adjustment device of the damping element changes, so that the damping force adjustment device of the air-driven damping element performs a corresponding operation to control the increase in the damping force of the damping element.

It should be noted that the filling and deflation speed of the air spring between the second displacement threshold range and the third displacement threshold range is greater than the filling and deflation speed of the air spring between the first displacement threshold range and the second displacement threshold range.

It can be seen that the damping force and height adjustment device claimed in the present invention can control the inflation or deflation of the air spring to achieve height adjustment at different positions, and can also drive the damping force adjustment device of the air-driven damping element to perform corresponding operations to control the damping element to output the corresponding damping force, thereby achieving damping force adjustment, that is, performing height adjustment at different positions, or achieving height adjustment and damping force adjustment simultaneously, so that the shock absorption effect is adapted to the position change, so that the comfort reaches the optimal state.

Further, FIG. 2 shows a two-dimensional diagram of a device for adjusting damping force and height according to an embodiment of the present invention, FIG. 3 shows a first cross-sectional diagram of a device for adjusting damping force and height according to an embodiment of the present invention, and FIG. 4 shows a second cross-sectional diagram of a device for adjusting damping force and height according to an embodiment of the present invention. As shown in FIGS. 2-4, the first cylinder A100 includes at least a first air inlet A110, a second air inlet A120, a first air outlet A130, and a second air outlet A1 40, a third air outlet A150, a first exhaust port A160, and a second exhaust port A170; the first air inlet A110 is connected to an air source, the first air inlet A110 is connected to a first air outlet A130; the first air outlet A130 is connected to a second air inlet A120; the second air outlet A140 is respectively connected to the first exhaust port A160 and a damping force adjustment device of a damping element; the third air outlet A150 is connected to an air spring connection port; the first exhaust port A160 and the second exhaust port A170 are respectively connected to the atmosphere;

When the relative displacement of the first cylinder A100 and the first control rod A200 relative to each other is between the first displacement threshold range and the second displacement threshold range, a gas flow connection is generated between the second air inlet A120 and the third air outlet A150 to realize the inflation of the air spring, or a gas flow connection is generated between the third air outlet A150 and the second exhaust port A170 to realize the deflation of the air spring; in this case, the air spring is inflated or deflated, but the damping force of the damping element still maintains the preset basic damping force.

When the relative displacement of the first cylinder A100 and the first control rod A200 relative to each other is between the second displacement threshold range and the third displacement threshold range, a gas flow connection is generated between the second air outlet A140 and the first air inlet A110 and the first exhaust port A160, so that the gas mass flow inside the damping force adjustment device of the damping element changes, thereby the damping force adjustment device of the air-driven damping element performs a corresponding operation, controls the damping element to output a corresponding damping force, and realizes the damping force adjustment of the damping element; at the same time, the third air outlet A150 and the first air inlet A110 and the first exhaust port A160 are connected to each other. A gas flow connection is generated between the two air inlets A120 to realize the inflation of the air spring; or, a gas flow connection is generated between the second air outlet A140, the second air inlet A120 and the first exhaust port A160, so that the gas mass flow inside the damping force adjustment device of the damping element changes, so that the damping force adjustment device of the air-driven damping element performs corresponding operations to control the damping element to output the corresponding damping force, and realizes the damping force adjustment of the damping element. At the same time, the third air outlet A150 and the second exhaust port A170 realize the deflation of the air spring. In this case, the height of the air spring and the damping force of the damping element are adjusted synchronously, which improves comfort and reduces the discomfort caused by rough roads.

Still as shown in FIG. 3 or 4 , at least four sealing elements A300 are disposed between the first cylinder A100 and the first control rod A200 , so that at least five gas chambers A400 separated from each other and continuous are formed between the first cylinder A100 and the first control rod A200 .

Further, still as shown in Figure 3 or 4, the gas chamber A400 includes a first gas chamber A410, a second gas chamber A420, a third gas chamber A430, a fourth gas chamber A440 and a fifth gas chamber A450, the first gas chamber A410 is connected to the gas source, the first gas chamber A410 is connected to the third gas chamber A430, the second gas chamber A420 is respectively connected to the damping force adjustment device of the damping element and the atmosphere; the fourth gas chamber A440 is connected to the air spring; and the fifth gas chamber A450 is connected to the atmosphere. Specifically, the first gas chamber A410 includes a first air inlet A110 and a second air outlet A130, the second gas chamber A420 includes a second air outlet A140 and a first exhaust port A160, the third gas chamber A430 includes a second air inlet A120, the fourth gas chamber A440 includes a third air outlet A150, and the fifth gas chamber A450 includes a second exhaust port A170. Since the five gas chambers are separated from each other but continuous with each other, and the first gas chamber A410 is connected to the third gas chamber A430, when the first control rod A200 reciprocates in the first cylinder A100, corresponding gas flow connections are generated in the five gas chambers, thereby achieving height adjustment or synchronous adjustment of height and damping force, so that comfort is optimized.

Figure 5 shows a stereoscopic view of a control rod according to an embodiment of the present invention, and Figure 6 shows a stereoscopic view of another control rod according to an embodiment of the present invention. As shown in Figure 5 or Figure 6, the first control rod A200 includes at least a first part A210 and a second part A220, and the second part A220 is arranged at the end of the first part A210, and the diameter of the first part A210 is smaller than the diameter of the second part A220.

Further, still as shown in Figure 5, the longitudinal axis of the second part A220 coincides with or is parallel to the longitudinal axis of the first part A210, and the area difference between the cross-section of the first part A210 and the cross-section of the second part A220 is used to bear the gas pressure, so that the first control rod moves under the drive of the gas pressure.

Specifically, as still shown in FIG. 5 or 6 , the second portion A220 includes at least one first axial groove A221. When there are multiple first axial grooves A221, the first axial grooves A221 may be located on the same horizontal line or on different horizontal lines, and the shapes of the multiple first axial grooves A221 may be the same or different. The second portion A220 mainly has the following two structures:

In the first structure, as still shown in FIGS. 4 and 5 , at least one first axial groove A221 is arranged corresponding to the third gas chamber A430. It should be noted that when the first control rod A200 and the first cylinder A100 do not have a relative displacement relative to each other, the first axial groove A221 is arranged correspondingly in the third gas chamber A430, that is, between the second sealing element A320 and the third sealing element A330. When the first control rod A200 and the first cylinder A100 are relatively displaced with respect to each other, when the first axial groove A221 passes over the third sealing element A330 between the third gas chamber A430 and the fourth gas chamber A440, a gas flow connection is generated between the third gas chamber A430 and the fourth gas chamber A440, thereby realizing inflation of the air spring; when the first axial groove A221 passes over the second sealing element A320 between the third gas chamber A430 and the second gas chamber A420, a gas flow connection is generated between the third gas chamber A430 and the second gas chamber A420, and the damping force adjustment device of the air-driven damping element performs corresponding operations to control the damping element to output corresponding damping force, thereby realizing damping force adjustment. It can be seen that the first axial groove A221 is provided inside the second part, which can not only connect the second gas chamber A420 and the third gas chamber A430 to provide gas for the air spring to inflate the air spring when the first control rod A200 and the first cylinder A100 are relatively displaced relative to each other, but also connect the third gas chamber A430 and the fourth gas chamber A440, and the damping force adjustment device of the air-driven damping element performs corresponding operations to control the damping element to output the corresponding damping force, thereby achieving damping force adjustment. At the same time, the friction between the first control rod and the first cylinder can be reduced to a certain extent, thereby improving the control accuracy.

At the same time, the second part A220 also includes at least one end area A222, and the end area A222 has a chamfer inclined relative to the longitudinal axis of the second part A220. Still as shown in FIG5, the second part A222 also includes a first end area A2221 and a second end area A2222, wherein the first end area A2221 is arranged at the end of the second part A220, and the end of the second part A220 is a part away from the end of the first part A210; the second end area A2222 is arranged at the front end of the second part A220, and the front end of the second part A220 is a part close to the end of the first part A210. Further, still as shown in FIG3 and FIG5, when the first end area A2221 crosses the fourth sealing element A340 between the fourth gas chamber A440 and the fifth gas chamber A450, a gas flow connection is generated between the fourth gas chamber A440 and the fifth gas chamber A450, that is, a gas flow connection is generated between the air spring and the atmosphere, and the air spring is deflated. When the second end region A2222 passes over the first sealing element A310 between the first gas chamber A410 and the second gas chamber A420, a gas flow connection is generated between the first gas chamber A410 and the second gas chamber A420, providing gas for the damping force adjustment device of the damping element, so that the gas mass flow inside the damping force adjustment device of the damping element changes, thereby driving the damping force adjustment device of the damping element to perform corresponding operations to control the damping element to output the corresponding damping force, thereby achieving damping force adjustment. The design of the end region reduces the friction between the first control rod and the first cylinder, so that the first control rod reciprocates more smoothly in the first cylinder, avoiding the phenomenon of the first control rod being stuck when reciprocating in the first cylinder, and further improving the control accuracy.

It can be seen that by providing at least one first axial groove at the same horizontal line between the front end and the end of the second part, and providing end areas at the front end and the end of the second part respectively, it is possible to simultaneously control the air spring height adjustment and the damping force adjustment.

The second structure, FIG7(a) shows a cross-sectional view of another device for adjusting damping force and height in a first working state according to an embodiment of the present invention, and FIG7(b) shows a cross-sectional view of another device for adjusting damping force and height in a second working state according to an embodiment of the present invention. In combination with FIG6, FIG7(a) and FIG7(b), at least one first axial groove A221 is correspondingly provided in the third gas chamber A430, and at least one first axial groove A223 is provided in the first gas chamber A410. It should be noted here that, as shown in FIG7(a), when the first control rod A200 and the first cylinder A100 do not generate relative displacement relative to each other, the first axial groove A223 is correspondingly provided in the first gas chamber A410, and the first axial groove A221 is correspondingly provided in the third gas chamber A430.

When the first axial groove A223 passes over the first sealing element A310 between the first gas chamber A410 and the second gas chamber A420, a gas flow connection is generated between the first gas chamber A410 and the second gas chamber A420, and the damping force adjustment device of the gas-driven damping element performs corresponding operations, controls the damping element to output the corresponding damping force, and realizes damping force adjustment. As shown in FIG7(b), when the first axial groove A223 completely passes over the first sealing element A310, the first sealing element A310 is in the a area in FIG6, and the first gas chamber A410 and the second gas chamber A420 are disconnected, and there is no gas flow connection, ensuring no gas leakage. At this time, the damping force of the damping element stops adjusting. In this case, it can be that after the suspension system achieves rapid descent, the first control rod A200 is in the lowest position, and as shown in FIG7(b), the first control rod A200 is still in contact with the bottom of the first cylinder A100. For example, after the seat suspension system achieves rapid descent, the first control rod is in the lowest position.

When the first axial groove A221 passes over the third sealing element A330 between the third gas chamber A430 and the fourth gas chamber A440, a gas flow connection is generated between the third gas chamber A430 and the fourth gas chamber A440, so that the air spring is inflated;

When the first axial groove A221 passes over the second sealing element A320 between the third gas chamber A430 and the second gas chamber A420, a gas flow connection is generated between the third gas chamber A430 and the second gas chamber A420, and the damping force adjustment device of the gas-driven damping element performs a corresponding operation to control the damping element to output a corresponding damping force, thereby realizing damping force adjustment. It can be seen that the first axial groove A221 is provided inside the second part, which can not only connect the second gas chamber A420 and the third gas chamber A430 to provide gas for the air spring to inflate the air spring when the first control rod A200 and the first cylinder A100 produce relative displacement relative to each other, but also connect the third gas chamber A430 and the fourth gas chamber A440, and the damping force adjustment device of the gas-driven damping element performs a corresponding operation to control the damping element to output a corresponding damping force, thereby realizing damping force adjustment.

At the same time, a first end region A2221 is also provided at the end of the second portion A220. When the first end region A2221 passes over the fourth sealing element A340 between the fourth gas chamber A440 and the fifth gas chamber A450, a gas flow connection is generated between the fourth gas chamber A440 and the fifth gas chamber A450, that is, a gas flow connection is generated between the air spring and the atmosphere, thereby achieving air spring deflation. The design of the end region reduces the friction between the first control rod and the first cylinder, so that the first control rod reciprocates more smoothly in the first cylinder, avoids the phenomenon of the first control rod being stuck when reciprocating in the first cylinder, and further improves the control accuracy.

It can be seen that by providing at least one first axial groove at different positions of the second part and providing an end region at the end of the second part, the height adjustment of the air spring or the synchronous adjustment of the height adjustment of the air spring and the damping force can be achieved.

It should be noted that the present application does not further limit the specific structure of the second part. In practical applications, the specific structure of the second part can be appropriately selected according to the actual situation.

Further, still in the first structure of the second part as shown in FIG5 , the second part has at least one second axial groove (A2221_1, A2222_1) connected to the end region (A2221, A2222). Still in the second structure of the second part as shown in FIG6 , the second part has at least one second axial groove A2221_1 connected to the first end region A2221.

Still as shown in Figures 3, 5 and 6, when the second axial groove A2221_1 of the first end area A2221 crosses the fourth sealing element 340 between the fourth gas chamber A440 and the fifth gas chamber A450, a trace gas flow connection is generated between the fourth gas chamber A440 and the fifth gas chamber A450, so that a small amount of gas is discharged from the air spring, thereby achieving fine-tuning of the air spring height, thereby realizing suspension adjustment of the suspension system at a specific position, which helps to further improve the comfort of the suspension system. When the second axial groove A2222_1 of the second end area A2222 passes over the first sealing element A310 between the first gas chamber A410 and the second gas chamber A420, a trace gas flow connection is generated between the first gas chamber A410 and the second gas chamber A420, providing less gas to the damping force adjustment device of the damping element, causing a slight change in the gas mass flow rate inside the damping force adjustment device of the damping element, thereby controlling the damping force output by the damping element to produce a slight change, achieving fine-tuning of the damping force, and helping to further improve the comfort of the suspension system.

It should be noted that the second axial groove A2221_1 passes over the fourth sealing element 340 between the fourth gas chamber A440 and the fifth gas chamber A450 before the first end area A2221, and the second axial groove A2222_1 passes over the first sealing element A310 between the first gas chamber A410 and the second gas chamber A420 before the second end area A2222.

It should also be noted that the technical solution claimed in the present application can control different gas mass flow rates by changing the shape and depth of the first axial groove (A221, A223) and/or the second axial groove (A2221_1, A2222_1), thereby achieving different height and/or damping force adjustments at different positions. For example, the first axial groove (A221, A223) may be a rectangular groove, a V-shaped groove, or as shown in FIG. 5, the first axial groove (A221, A223) may include a rectangular groove and a second axial groove (A2221_1, A2222_1). A2222_1), wherein the rectangular groove is located at the upper part and the second axial groove (A2221_1, A2222_1) is located at the lower part, or, the rectangular groove is located at the lower part and the second axial groove (A2221_1, A2222_1) is located at the upper part, or, the rectangular groove is located in the middle of the two second axial grooves (A2221_1, A2222_1); the second axial groove (A2221_1, A2222_1) can be a rectangular groove or a V-shaped groove, and the present application does not further limit the shapes of the first axial groove and the second axial groove.

Specifically, the inflation speed of the air spring and the speed of damping force adjustment can be controlled by changing the shape and depth of the first axial groove (A221, A223). For example, the shape of the first axial groove A221 is designed to be a rhombus, so that when the vertex area of the lower triangle of the first axial groove A221 passes over the third sealing element A330 between the third gas chamber A430 and the fourth gas chamber A440, a small amount of gas flow connection is generated between the third gas chamber A430 and the fourth gas chamber A440, so that a small amount of gas Filled into the air spring, the height of the air spring can be fine-tuned, thereby achieving suspension adjustment of the suspension system at a specific position, which helps to further improve the comfort of the suspension system; when the non-vertex area of the lower triangle of the first axial groove A221 passes over the third sealing element A330 between the third gas chamber A430 and the fourth gas chamber A440, a large amount of gas flow connection is generated between the third gas chamber A430 and the fourth gas chamber A440, so that more gas is filled into the air spring, and the height of the air spring can be quickly adjusted. When the vertex area of the upper triangle of the first axial groove A221 passes over the second sealing element A320 between the third gas chamber A430 and the second gas chamber A420, a small amount of gas flow connection is generated between the third gas chamber A430 and the second gas chamber A420, providing a small amount of gas for the damping force adjustment device of the damping element, slightly changing the change in the gas mass flow rate inside the damping force adjustment device of the damping element, thereby achieving fine-tuning of the damping force, and thus obtaining better comfort. When the non-vertex area of the upper triangle of the first axial groove A221 passes over the second sealing element A320 between the third gas chamber A430 and the second gas chamber A420, a large amount of gas flow connection is generated between the third gas chamber A430 and the second gas chamber A420, providing more gas for the damping force adjustment device of the damping element, greatly changing the change of the gas mass flow rate inside the damping force adjustment device of the damping element, thereby quickly adjusting the damping force and obtaining better comfort. In addition, the design of the first axial groove can reduce the friction force generated by the first control rod and the sealing element when the first control rod reciprocates in the first cylinder, thereby avoiding the phenomenon of jamming when the first control rod reciprocates in the first cylinder and improving the control accuracy. Similarly, the shape of the first axial groove A223 can also be designed to be a rhombus.

In addition, the shape of the first axial groove A223 can be designed to be V-shaped. When the small opening area of the first axial groove A223 passes over the first sealing element A310 between the first gas chamber A410 and the second gas chamber A420, a trace gas flow connection is generated between the first gas chamber A410 and the second gas chamber A420, providing a small amount of gas for the damping force adjustment device of the damping element, slightly changing the change in the gas mass flow rate inside the damping force adjustment device of the damping element, thereby achieving fine-tuning of the damping force and obtaining better comfort. When the large opening area of the first axial groove A223 passes over the first sealing element A310 between the first gas chamber A410 and the second gas chamber A420, a larger gas flow connection is generated between the first gas chamber A410 and the second gas chamber A420, providing more gas for the damping force adjustment device of the damping element, greatly changing the change in the gas mass flow rate inside the damping force adjustment device of the damping element, thereby realizing the adjustment of the damping force more quickly and obtaining better comfort.

In order to meet the needs of different suspension working strokes of the suspension system, it is necessary to adapt the working stroke of the device for adjusting the damping force and height to the suspension working stroke of the suspension system. If the suspension working stroke of the suspension system is longer, then the working stroke of the device for adjusting the damping force and height needs to be longer. Otherwise, once the suspension working stroke of the suspension system exceeds the working stroke of the device for adjusting the damping force and height, the device for adjusting the damping force and height will be damaged. In this case, the cost of the device for adjusting the damping force and height with a longer working stroke increases, and the overall tensile strength of the device for adjusting the damping force and height becomes weaker. In order to solve this problem, the present invention proposes another device for adjusting the damping force and height. FIG8 shows a stereoscopic view of another device for adjusting damping force and height according to an embodiment of the present invention, FIG9 shows an exploded view of another device for adjusting damping force and height according to an embodiment of the present invention, FIG10(a) shows a cross-sectional view of another device for adjusting damping force and height according to an embodiment of the present invention in a first working state, and FIG10(b) shows a cross-sectional view of another device for adjusting damping force and height according to an embodiment of the present invention in a second working state. As shown in FIGS. 8, 9, 10(a) and 10(b), the device 10 for adjusting damping force and height further includes a gas compression device B, which is connected to a gas source;

The gas compression device B includes a second cylinder B100 and at least one second control rod B200 slidably arranged in the second cylinder B100; the second control rod B200 is connected to the first control rod A200, for example, the first control rod B200 is connected to the first control rod A200 through a fixing device D. As shown in FIG10(b), when the relative displacement of the first control rod A200 and the first cylinder A100 relative to each other reaches the maximum working stroke, the relative displacement of the second control rod B200 and the second cylinder B100 relative to each other is compensated. That is to say, as shown in FIG10( a), within the working stroke of the regulating valve A, the working stroke of the gas compression device B does not change, and the gas compression device only serves as a connection, wherein the working stroke of the regulating valve A is determined by the relative displacement of the first control rod A200 and the first cylinder A100 compared to each other, and the working stroke of the gas compression device B is determined by the relative displacement of the second control rod B200 and the second cylinder B100 compared to each other; when the working stroke of the regulating valve A reaches the maximum value, the working stroke of the gas compression device B is used to compensate, thereby extending the working stroke of the regulating valve A, thereby achieving the goal of meeting the requirements of different suspension working strokes of different suspension systems while ensuring the optimal overall tensile strength of the device for adjusting the damping force and height.

Further, as still shown in FIG8 , the device 10 for adjusting the damping force and height further includes a guide device C, and the gas compression device B and the regulating valve A are respectively slidably connected to the guide device C, and the gas compression device B is connected to the regulating valve A. In practical applications, it is also possible to only slide the regulating valve A with the guide device C, and the gas compression device B is not slidably connected with the guide device C. In this case, the gas compression device B is connected to the regulating valve A. It is also possible to only slide the gas compression device B with the guide device C, and the regulating valve A is not slidably connected with the guide device C. In this case, the gas compression device B is connected to the regulating valve A. The present application does not further limit the connection mode between the gas compression device B and the regulating valve A and the guide device C. The guide device C enables the motion working stroke of the gas compression device B and the regulating valve A to be on the same longitudinal axis, and to withstand a certain lateral pressure, thereby improving the control accuracy of the device for adjusting the damping force and height. At the same time, the device for adjusting the damping force and height can be fixed to the suspension system through the guide device. It can be seen that the guide device plays the role of positioning, guiding and bearing a certain lateral pressure in the technical solution claimed for protection in this application.

Specifically, the guide device C mainly includes the following two structures:

The first structure, still as shown in Figures 8 and 9, the guide device C includes at least two guide ring grooves C110 and at least one guide rod C120, the guide rod C120 and the guide ring groove C110 slide relative to each other; the gas compression device B is connected to at least one guide ring groove C110; and the regulating valve A is connected to at least one guide ring groove C110.

The second structure, FIG11 shows a stereoscopic view of another device for adjusting damping force and height in one embodiment of the present invention, and FIG12 shows an exploded view of another device for adjusting damping force and height in one embodiment of the present invention, as shown in FIGS. 11-12, the guide device C includes at least one guide plate C210, at least three guide grooves C220 and at least two guide rods C230; the guide groove C220 includes a guide ring groove C221 and a guide groove C222; at least two guide ring grooves C221 are arranged on both sides of the guide plate C210, for example, at least two symmetrical guide ring grooves C221 are arranged on both sides of the guide plate C210, and at least one guide groove C222 is arranged at the center of the guide plate C210; the gas compression device B is provided with a guide block B300, and the guide block B300 slides in the guide groove C222; the regulating valve A is arranged on the guide plate C210; the guide rod C230 and the guide ring groove C221 slide relative to each other, specifically, the guide rod C230 slides in the guide ring groove C221.

It should be noted that, in practical applications, the guide device of the first structure or the guide device of the second structure can be selected for application according to actual needs, and the present application does not make any further limitation on the structure of the guide device.

It should also be noted that the device 10 for adjusting the damping force and height can be applied to any suspension system, including a seat suspension system, a vehicle chassis suspension system, and a cab suspension system. The present application does not further limit the application field of the device 10 for adjusting the damping force and height.

Embodiment 2

FIG13 shows a functional structural diagram of a seat according to an embodiment of the present invention. As shown in FIG13 , a seat has at least two scissor frame structures (50, 60) that move relative to each other, at least one damping element 40 for shock absorption and an air spring 20 for height adjustment. The seat also includes a damping force adjustment device of the damping element (not shown in the figure) and a damping force and height adjustment device 10 as claimed in the first embodiment. The positions of the damping element 40, the air spring 20, the damping force adjustment device of the damping element and the damping force and height adjustment device 10 are adapted to each other. The damping force and height adjustment device 10 is connected to the damping force adjustment device of the damping element and the air spring 20, respectively.

One end of the damping force and height adjusting device 10 is connected to one of the scissor frame structures 50, and the other end of the damping force and height adjusting device 10 is connected to another scissor frame structure 60. The relative movement of the two relatively moving scissor frame structures (50, 60) drives the damping force and height adjusting device 10 to control the inflation or deflation of the air spring 20 to achieve the suspension adjustment of the seat; and/or, the relative movement of the two relatively moving scissor frame structures (50, 60) drives the damping force and height adjusting device 10 to control the damping force adjusting device of the damping element to perform corresponding operations. Specifically, the damping force and height adjusting device 10 drives the damping force adjusting device 20 of the damping element to perform corresponding operations, controls the damping element to output corresponding damping force, and achieves the damping force adjustment of the seat.

It can be seen that the seat for which protection is sought in the present invention can achieve both height adjustment and synchronous adjustment of height and damping force through the device for adjusting damping force and height, so that the comfort of the seat reaches the best state. Compared with the seat in the prior art that achieves synchronous adjustment of height and damping force through electric control, the technical solution of the present invention improves the sensitivity of height adjustment and damping force adjustment, and further improves comfort; in addition, the technical solution of the present invention eliminates the need for the driver to manually adjust the damping force and height during driving, so that the driver's attention is more focused, which can reduce the occurrence of traffic accidents to a certain extent; and the device for adjusting damping force and height in the seat is composed of a linear structure, which is adapted to the height of the seat suspension system, and is not limited by the space and installation position of the seat suspension system itself, and is easy to install, has a low failure rate, is easy to maintain, and has a low cost.

Furthermore, the seat also includes a cable, which is connected to the device 10 for adjusting the damping force and height. Specifically, the cable passes through the guide slot (C200, C300) of the guide device and is connected to the device for adjusting the damping force and height. The cable drives the device 10 for adjusting the damping force and height to reciprocate to achieve the height adjustment of the seat. On the one hand, the driver can adjust the seat to the optimal height through the cable according to his own needs, realize the height gear memory adjustment of the seat, and then obtain a posture that is easy to operate the steering wheel, pedals, gear lever and other devices, thereby improving comfort; on the other hand, the driver can pull the cable according to actual needs to achieve synchronous adjustment of the height and damping force of the seat, so as to reduce the discomfort caused by the rugged road surface and obtain the best comfort. It should be noted that the length of the cable can be adjusted mechanically, for example, by adjusting the length of the cable by adjusting the handle; it can also be adjusted by electronic control. For example, the length of the cable is adjusted by a motor, and the present application does not further limit the control method of the cable length.

Embodiment 3

A vehicle suspension system includes a vehicle body and at least four wheels, at least two damping elements for shock absorption and an air spring for height adjustment are arranged between the vehicle body and the wheels, the vehicle suspension system also includes a damping force adjustment device for the damping element and a device 10 for adjusting the damping force and height as claimed in Example 1, the positions of the damping element, the air spring, the damping force adjustment device for the damping element (not shown in the figure) and the device 10 for adjusting the damping force and height are adapted to each other, and the device 10 for adjusting the damping force and height is respectively connected to the damping force adjustment device for the damping element and the air spring. It can be seen that as long as the height of the vehicle suspension changes, the relative movement between the vehicle body and the wheel can drive the first cylinder and the first control rod to produce relative displacement relative to each other, so that a gas flow connection is generated between the damping force adjustment device of the damping element and the air source and the atmosphere, and/or the air spring is connected to the air source or the atmosphere, thereby realizing the height of the vehicle suspension system or the synchronous adjustment of the height and the damping force, so that the shock absorbing effect of the vehicle suspension system is adapted to the height of the vehicle suspension system, thereby improving the sensitivity of the height adjustment and the damping force adjustment, and having convenient installation, low failure rate, convenient maintenance and low cost.

In summary, the damping force and height adjustment device claimed in the present invention can control the inflation or deflation of the air spring to achieve height adjustment through the relative displacement of the first control rod and the first cylinder relative to each other, and can also simultaneously drive the damping force adjustment device of the damping element to perform corresponding operations, control the damping element to output the corresponding damping force, and achieve damping force adjustment, that is, to achieve height adjustment of the suspension system or to achieve height adjustment and damping force adjustment of the suspension system simultaneously, so that the shock absorption effect reaches the best state. Compared with the prior art that achieves synchronous adjustment of height and damping force by electronic control, the technical solution of the present invention improves the sensitivity of height adjustment and damping force adjustment, and further improves comfort; in addition, the technical solution of the present invention eliminates the need for the driver to manually adjust the damping force and height during driving, so that the driver's attention is more concentrated, and the occurrence of traffic accidents can be reduced to a certain extent; and the technical solution of the present invention is composed of a linear structure, which is adapted to the height of the suspension system, is not limited by the space and installation position of the suspension system itself, is easy to install, has a low failure rate, is convenient to maintain, and has a low cost.

Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

The present invention discloses A1, a device for adjusting damping force and height, the device for adjusting damping force and height comprises a regulating valve, the regulating valve is respectively connected to an air source, atmosphere, an air spring and a damping force regulating device of a damping element;

The regulating valve comprises a first cylinder and at least one first control rod slidably arranged in the first cylinder.

Through the relative displacement of the first control rod and the first cylinder relative to each other, a gas flow connection is generated between the air spring and the air source or the atmosphere, thereby realizing the height adjustment of the air spring; and/or, the damping force adjustment device of the damping element is connected to the gas flow between the air source and the atmosphere, so that the damping force adjustment device of the damping element is air-driven to perform corresponding operations to control the damping element to output the corresponding damping force, thereby realizing the adjustment of the damping force of the damping element.

A2. The device for adjusting damping force and height as described in A1, wherein the working stroke of the regulating valve includes at least three displacement threshold ranges, wherein the second displacement threshold range includes the first displacement threshold range, and the third displacement threshold range includes the second displacement threshold range;

When the relative displacement of the first cylinder and the first control rod relative to each other is within the first displacement threshold range, so that no gas flow connection is generated between the air spring and the gas source or the atmosphere, the air spring is neither inflated nor deflated, and no gas flow connection is generated between the damping force adjustment device of the damping element and the gas source and the atmosphere, the damping force of the damping element maintains a preset basic damping force;

When the relative displacement of the first cylinder and the first control rod relative to each other is between the first displacement threshold range and the second displacement threshold range, a gas flow connection is generated between the air spring and the air source or the atmosphere, thereby achieving inflation or deflation of the air spring;

When the relative displacement of the first cylinder and the first control rod relative to each other is between the second displacement threshold range and the third displacement threshold range, the damping force adjustment device of the damping element is connected to the gas flow between the air source and the atmosphere, and the air drives the damping force adjustment device of the damping element to perform corresponding operations, thereby adjusting the damping force of the damping element, and generating a gas flow connection between the air spring and the air source or the atmosphere, thereby realizing inflation or deflation of the air spring.

A3. The device for adjusting damping force and height as described in A2, wherein the first cylinder comprises at least one first air inlet, a second air inlet, a first air outlet, a second air outlet, a third air outlet, a first exhaust port, and a second exhaust port;

The first air inlet is connected to an air source, and the first air inlet is connected to the first air outlet;

The first air outlet is connected to the second air inlet;

The second air outlet is connected to the first exhaust and damping force adjustment device of the damping element respectively;

The third air outlet is connected to the air spring connection port;

The first exhaust port and the second exhaust port are connected to the atmosphere respectively.

A4. The device for adjusting damping force and height as described in A3, wherein when the relative displacement of the first cylinder and the first control rod relative to each other is between the first displacement threshold range and the second displacement threshold range, a gas flow connection is generated between the second air inlet and the third air outlet to achieve inflation of the air spring, or a gas flow connection is generated between the third air outlet and the second air outlet to achieve deflation of the air spring;

When the relative displacement of the first cylinder and the first control rod with respect to each other is between the second displacement threshold range and the third displacement threshold range, a gas flow connection is generated between the second air outlet, the first air inlet and the first exhaust port, and the damping force adjustment device of the damping element is driven by air to perform corresponding operations, thereby adjusting the damping force of the damping element, and a gas flow connection is generated between the third air outlet and the second air inlet, thereby inflating the air spring; or, a gas flow connection is generated between the second air outlet, the second air inlet and the first exhaust port, and the damping force adjustment device of the damping element is driven by air to perform corresponding operations, thereby adjusting the damping force of the damping element, and a gas flow connection is generated between the third air outlet and the second exhaust port, thereby deflating the air spring.

A5. A device for adjusting damping force and height as described in A1 or A2 or A3 or A4, wherein at least four sealing elements are arranged between the first cylinder and the first control rod, thereby forming at least five gas chambers separated from each other and continuous between the first cylinder and the first control rod.

A6. A device for adjusting damping force and height as described in A5, wherein the first gas chamber is connected to the gas source, the first gas chamber is connected to the third gas chamber, the second gas chamber is respectively connected to the damping force adjustment device of the damping element and the atmosphere, the fourth gas chamber is connected to the air spring, and the fifth gas chamber is connected to the atmosphere.

A7. A device for adjusting damping force and height as described in A6, wherein the first control rod includes at least a first part and a second part, the second part is arranged at the end of the first part, and the diameter of the first part is smaller than the diameter of the second part.

A8. A device for adjusting damping force and height as described in A7, wherein the longitudinal axis of the second part coincides with or is parallel to the longitudinal axis of the first part, and the area difference between the cross-section of the first part and the cross-section of the second part is used to bear the gas pressure.

A9. A device for adjusting damping force and height as described in A8, wherein the second part includes at least one first axial groove.

A10. The device for adjusting damping force and height as described in A9, wherein the first axial groove is arranged corresponding to the third gas chamber;

When the first axial groove passes over the third sealing element between the third gas chamber and the fourth gas chamber, a gas flow connection is generated between the third gas chamber and the fourth gas chamber, so that the air spring is inflated;

When the first axial groove passes over the second sealing element between the third gas chamber and the second gas chamber, a gas flow connection is generated between the third gas chamber and the second gas chamber, and the damping force adjustment device of the damping element is driven by gas to perform corresponding operations to control the damping element to output the corresponding damping force, thereby realizing the adjustment of the damping force of the damping element.

A11. The device for adjusting damping force and height as described in A10, wherein the first axial groove is also arranged corresponding to the first gas chamber;

When the first axial groove passes over the first sealing element between the first gas chamber and the second gas chamber, a gas flow connection is generated between the first gas chamber and the second gas chamber, and the damping force adjustment device of the damping element is driven by gas to perform corresponding operations to control the damping element to output a corresponding damping force, thereby realizing the adjustment of the damping force of the damping element.

A12. A device for adjusting damping force and height as described in A10, wherein the second part also includes at least one end area, and the end area has a chamfer inclined relative to the longitudinal axis of the second part.

A13. A device for adjusting damping force and height as described in A12, wherein the end region is arranged at the end of the second part, and when the end region passes over the fourth sealing element between the fourth gas chamber and the fifth gas chamber, a gas flow connection is generated between the fourth gas chamber and the fifth gas chamber, thereby achieving deflation of the air spring.

A14. A device for adjusting damping force and height as described in A13, wherein the end region is also arranged at the front end of the second part, and when the end region passes over the first sealing element between the first gas chamber and the second gas chamber, a gas flow connection is generated between the first gas chamber and the second gas chamber, and the damping force adjustment device of the gas-driven damping element performs corresponding operations to control the damping element to output corresponding damping force, thereby realizing the adjustment of the damping force of the damping element.

A15. A device for adjusting damping force and height as described in any one of A12-A14, wherein the second part has at least one second axial groove connected to the end area.

A16. The device for adjusting the damping force and height as described in A1, wherein the device for adjusting the damping force and height further comprises a gas compression device, and the gas compression device is connected to a gas source;

The gas compression device includes a second cylinder and at least one second control rod slidably arranged in the second cylinder; the second control rod is connected to the first control rod; when the relative displacement of the first control rod and the first cylinder relative to each other reaches the maximum working stroke, the relative displacement of the second control rod and the second cylinder relative to each other is compensated.

A17. A device for adjusting the damping force and height as described in A16, wherein the device for adjusting the damping force and height also includes a guiding device, the gas compression device and/or the regulating valve are slidingly connected to the guiding device, and the gas compression device is connected to the regulating valve.

A18. The device for adjusting damping force and height as described in A17, wherein the guide device comprises at least two guide ring grooves and at least one guide rod, and the guide rod and the guide ring groove slide relative to each other;

The gas compression device is connected to at least one guide ring groove;

The regulating valve is connected to at least one guide ring groove.

A19. The device for adjusting damping force and height as described in A17, wherein the guide device comprises at least one guide plate, at least three guide grooves and at least two guide rods; the guide groove comprises a guide ring groove and a guide groove;

At least two guide ring grooves are provided on both sides of the guide plate, and at least one guide groove is provided at the center of the guide plate;

The gas compression device is provided with a guide block, and the guide block slides in the guide groove;

The regulating valve is arranged on the guide plate;

The guide rod and the guide ring groove slide relative to each other.

The present invention also discloses B20, a seat, the seat having at least two relatively movable scissor frame structures, at least one damping element for shock absorption and an air spring for height adjustment, the seat also comprising a damping force adjustment device of the damping element and a device for adjusting the damping force and height as described in any one of A1-A19, the positions of the damping element, the air spring, the damping force adjustment device of the damping element and the device for adjusting the damping force and height being adapted to each other, the device for adjusting the damping force and height being connected to the damping force adjustment device of the damping element and the air spring respectively;

One end of the device for adjusting the damping force and height is connected to one of the scissor frame structures, and the other end of the device for adjusting the damping force and height is connected to the other scissor frame structure. The relative movement of the two relatively moving scissor frame structures drives the device for adjusting the damping force and height to control the inflation or deflation of the air spring to achieve suspension adjustment of the seat; and/or, the relative movement of the two relatively moving scissor frame structures drives the device for adjusting the damping force and height to control the damping force adjustment device of the damping element to perform corresponding operations to achieve seat damping force adjustment.

B21. A seat as described in B20, wherein the seat further comprises a cable, wherein the cable is connected to the device for adjusting the damping force and the height, and wherein the cable drives the device for adjusting the damping force and the height to reciprocate, thereby achieving height adjustment of the seat.

The present invention further discloses C22, a vehicle suspension system, the vehicle suspension system includes a vehicle body and at least four wheels, at least two damping elements for shock absorption and an air spring for height adjustment are arranged between the vehicle body and the wheels, the vehicle suspension system also includes a damping force adjustment device of the damping element and a device for adjusting the damping force and height as described in any one of A1-A19, the positions of the damping element, the air spring, the damping force adjustment device of the damping element and the device for adjusting the damping force and height are adapted to each other, and the device for adjusting the damping force and height is respectively connected to the damping force adjustment device of the damping element and the air spring.

Claims (21)

1. A device for adjusting damping force and height, characterized in that the device for adjusting damping force and height comprises a regulating valve, and the regulating valve is respectively connected to the damping force regulating device of the air source, the atmosphere, the air spring and the damping element; The regulating valve comprises a first cylinder and at least one first control rod slidably arranged in the first cylinder, and the relative displacement of the first control rod and the first cylinder relative to each other enables a gas flow connection between the air spring and the air source or the atmosphere to achieve height adjustment of the air spring; and/or enables a damping force adjustment device of the damping element to be connected to a gas flow between the air source and the atmosphere, so that the damping force adjustment device of the damping element is gas-driven to perform a corresponding operation to control the damping element to output a corresponding damping force, thereby achieving adjustment of the damping force of the damping element; The first cylinder comprises at least one first air inlet, a second air inlet, a first air outlet, a second air outlet, a third air outlet, a first exhaust port, and a second exhaust port; The first air inlet is connected to an air source, and the first air inlet is connected to the first air outlet; The first air outlet is connected to the second air inlet; The second air outlet is connected to the first exhaust and damping force adjustment device of the damping element respectively; The third air outlet is connected to the air spring connection port; The first exhaust port and the second exhaust port are connected to the atmosphere respectively. 2. The device for adjusting damping force and height according to claim 1, characterized in that: The working stroke of the regulating valve includes at least three displacement threshold ranges, wherein the second displacement threshold range includes the first displacement threshold range, and the third displacement threshold range includes the second displacement threshold range; When the relative displacement of the first cylinder and the first control rod relative to each other is within the first displacement threshold range, so that no gas flow connection is generated between the air spring and the gas source or the atmosphere, the air spring is neither inflated nor deflated, and no gas flow connection is generated between the damping force adjustment device of the damping element and the gas source and the atmosphere, the damping force of the damping element maintains a preset basic damping force; When the relative displacement of the first cylinder and the first control rod relative to each other is between the first displacement threshold range and the second displacement threshold range, a gas flow connection is generated between the air spring and the air source or the atmosphere, thereby achieving inflation or deflation of the air spring; When the relative displacement of the first cylinder and the first control rod relative to each other is between the second displacement threshold range and the third displacement threshold range, the damping force adjustment device of the damping element is connected to the gas flow between the air source and the atmosphere, and the air drives the damping force adjustment device of the damping element to perform corresponding operations, thereby adjusting the damping force of the damping element, and generating a gas flow connection between the air spring and the air source or the atmosphere, thereby realizing inflation or deflation of the air spring. 3. The device for adjusting damping force and height as claimed in claim 2, characterized in that when the relative displacement of the first cylinder and the first control rod relative to each other is between the first displacement threshold range and the second displacement threshold range, a gas flow connection is generated between the second air inlet and the third air outlet to achieve inflation of the air spring, or a gas flow connection is generated between the third air outlet and the second exhaust port to achieve deflation of the air spring; When the relative displacement of the first cylinder and the first control rod with respect to each other is between the second displacement threshold range and the third displacement threshold range, a gas flow connection is generated between the second air outlet, the first air inlet and the first exhaust port, and the damping force adjustment device of the damping element is driven by air to perform corresponding operations, thereby adjusting the damping force of the damping element, and a gas flow connection is generated between the third air outlet and the second air inlet, thereby inflating the air spring; or, a gas flow connection is generated between the second air outlet, the second air inlet and the first exhaust port, and the damping force adjustment device of the damping element is driven by air to perform corresponding operations, thereby adjusting the damping force of the damping element, and a gas flow connection is generated between the third air outlet and the second exhaust port, thereby deflating the air spring. 4. The device for adjusting damping force and height according to claim 1, characterized in that: At least four sealing elements are arranged between the first cylinder and the first control rod, so that at least five gas chambers separated from each other and continuous are formed between the first cylinder and the first control rod. 5. The device for adjusting damping force and height as described in claim 4 is characterized in that the first gas chamber is connected to the gas source, the first gas chamber is connected to the third gas chamber, the second gas chamber is respectively connected to the damping force adjustment device of the damping element and the atmosphere, the fourth gas chamber is connected to the air spring, and the fifth gas chamber is connected to the atmosphere. 6. The device for adjusting damping force and height as claimed in claim 5, characterized in that: The first control rod includes at least a first portion and a second portion, wherein the second portion is disposed at a distal end of the first portion, and a diameter of the first portion is smaller than a diameter of the second portion. 7. The device for adjusting damping force and height as described in claim 6 is characterized in that the longitudinal axis of the second part coincides with or is parallel to the longitudinal axis of the first part, and the area difference between the cross-section of the first part and the cross-section of the second part is used to bear the gas pressure. 8. The device for adjusting damping force and height as claimed in claim 7, characterized in that the second portion includes at least one first axial groove. 9. The device for adjusting damping force and height according to claim 8, characterized in that the first axial groove is arranged corresponding to the third gas chamber; When the first axial groove passes over the third sealing element between the third gas chamber and the fourth gas chamber, a gas flow connection is generated between the third gas chamber and the fourth gas chamber, thereby achieving inflation of the air spring; When the first axial groove passes over the second sealing element between the third gas chamber and the second gas chamber, a gas flow connection is generated between the third gas chamber and the second gas chamber, and the damping force adjustment device of the damping element is driven by gas to perform corresponding operations to control the damping element to output the corresponding damping force, thereby realizing the adjustment of the damping force of the damping element. 10. The device for adjusting damping force and height according to claim 9, characterized in that the first axial groove is also arranged corresponding to the first gas chamber; When the first axial groove passes over the first sealing element between the first gas chamber and the second gas chamber, a gas flow connection is generated between the first gas chamber and the second gas chamber, and the damping force adjustment device of the damping element is driven by gas to perform corresponding operations to control the damping element to output a corresponding damping force, thereby realizing the adjustment of the damping force of the damping element. 11. The device for adjusting damping force and height according to claim 9, wherein the second portion further comprises at least one end region having a chamfer inclined relative to a longitudinal axis of the second portion. 12. The device for adjusting damping force and height as described in claim 11 is characterized in that the end area is arranged at the end of the second part, and when the end area passes over the fourth sealing element between the fourth gas chamber and the fifth gas chamber, a gas flow connection is generated between the fourth gas chamber and the fifth gas chamber, thereby realizing the deflation of the air spring. 13. The device for adjusting the damping force and height as described in claim 12 is characterized in that the end area is also arranged at the front end of the second part. When the end area passes over the first sealing element between the first gas chamber and the second gas chamber, a gas flow connection is generated between the first gas chamber and the second gas chamber, and the damping force adjustment device of the damping element is driven by gas to perform corresponding operations to control the damping element to output the corresponding damping force, thereby realizing the adjustment of the damping force of the damping element. 14. The device for adjusting damping force and height according to any one of claims 11 to 13, characterized in that the second portion has at least one second axial groove connected to the end region. 15. The device for adjusting the damping force and height according to claim 1, characterized in that the device for adjusting the damping force and height further comprises a gas compression device, and the gas compression device is connected to a gas source; The gas compression device includes a second cylinder and at least one second control rod slidably arranged in the second cylinder; the second control rod is connected to the first control rod; when the relative displacement of the first control rod and the first cylinder relative to each other reaches the maximum working stroke, the relative displacement of the second control rod and the second cylinder relative to each other is compensated. 16. The device for adjusting the damping force and height as described in claim 15 is characterized in that the device for adjusting the damping force and height also includes a guiding device, the gas compression device and/or the regulating valve are slidingly connected to the guiding device, and the gas compression device is connected to the regulating valve. 17. The device for adjusting damping force and height according to claim 16, characterized in that the guide device comprises at least two guide ring grooves and at least one guide rod, and the guide rod and the guide ring groove slide relative to each other; The gas compression device is connected to at least one guide ring groove; The regulating valve is connected to at least one guide ring groove. 18. The device for adjusting damping force and height according to claim 16, characterized in that the guide device comprises at least one guide plate, at least three guide grooves and at least two guide rods; the guide groove comprises a guide ring groove and a guide groove; At least two guide ring grooves are provided on both sides of the guide plate, and at least one guide groove is provided at the center of the guide plate; The gas compression device is provided with a guide block, and the guide block slides in the guide groove; The regulating valve is arranged on the guide plate; The guide rod and the guide ring groove slide relative to each other. 19. A seat, the seat having at least two relatively movable scissor frame structures, at least one damping element for shock absorption and an air spring for height adjustment, characterized in that the seat further comprises a damping force adjustment device for the damping element and a device for adjusting the damping force and height as claimed in any one of claims 1 to 18, the positions of the damping element, the air spring, the damping force adjustment device for the damping element and the device for adjusting the damping force and height are adapted to each other, and the device for adjusting the damping force and height is connected to the damping force adjustment device for the damping element and the air spring respectively; One end of the device for adjusting the damping force and height is connected to one of the scissor frame structures, and the other end of the device for adjusting the damping force and height is connected to the other scissor frame structure. The relative movement of the two relatively moving scissor frame structures drives the device for adjusting the damping force and height to control the inflation or deflation of the air spring to achieve suspension adjustment of the seat; and/or, the relative movement of the two relatively moving scissor frame structures drives the device for adjusting the damping force and height to control the damping force adjustment device of the damping element to perform corresponding operations to achieve seat damping force adjustment. 20. The seat as described in claim 19 is characterized in that the seat also includes a cable, the cable is connected to the device for adjusting the damping force and the height, and the cable drives the device for adjusting the damping force and the height to reciprocate to achieve height adjustment of the seat. 21. A vehicle suspension system, comprising a vehicle body and at least four wheels, wherein at least two damping elements for shock absorption and an air spring for height adjustment are arranged between the vehicle body and the wheels, and characterized in that the vehicle suspension system also comprises a damping force adjustment device of the damping element and a device for adjusting the damping force and height as described in any one of claims 1 to 18, wherein the positions of the damping element, the air spring, the damping force adjustment device of the damping element and the device for adjusting the damping force and height are adapted to each other, and the device for adjusting the damping force and height is respectively connected to the damping force adjustment device of the damping element and the air spring.