CN111425546A - Shock-absorbing device - Google Patents

Abstract

The present invention provides a damping device. The shock absorbing device includes: a casing having a cylindrical side wall and a top wall connected to a top end of the cylindrical side wall, the cylindrical side wall and the top wall defining an area of the casing a longitudinal inner cavity; a push rod that extends axially through the housing, the top end of the push rod extending beyond the top wall of the housing; a first magnet, the first magnet is provided at the The top end of the push rod; a second magnet, the second magnet is arranged below the top wall of the housing. In addition, a sliding block can be provided on the push rod, and the sliding block on the push rod can slide over the entire length of the inner cavity of the housing and has a large stroke. Therefore, even when driving on a bumpy road with great vibration, it can achieve a good shock absorption effect and meet the stability needs of the AGV robot in the process of handling goods.

Description

Shock Absorber

technical field

The invention relates to the technical field of handling robots, in particular to a shock absorbing device for handling robots.

Background technique

In the field of automatic guided handling robot (AGV) technology, in order to improve the driving smoothness and stability of the automatic guided handling robot in the process of handling goods, and reduce the vibration between the chassis and the body, the chassis of the automatic guided handling robot is currently equipped with The shock absorber, and the shock absorption effect of the shock absorber also determines the stability of the goods during the handling process.

However, the current shock absorbers are difficult to provide satisfactory stability for situations where there is a lot of vibration and shaking on rough roads, especially when the handling robot is slightly faster, which significantly affects the handling efficiency of goods.

Therefore, there is a need in the art for a shock absorber that can achieve good shock absorption on rough roads.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a damping device so as to solve the above problems existing in the prior art.

In order to achieve the above object, the specific solution of the present invention is to provide a shock absorption device, the shock absorption device comprising:

a casing, the casing has a cylindrical side wall and a top wall connected with a top end of the cylindrical side wall, the cylindrical side wall and the top wall define a longitudinal inner cavity of the casing;

a push rod extending axially through the housing, the top end of the push rod extending beyond the top wall of the housing;

a first magnet, which is arranged at the top of the push rod;

The second magnet is arranged under the top wall of the casing.

In one embodiment, the push rod is provided with a slider, the slider is fixed with the push rod and is configured to be able to slide along the inner cavity of the casing, and the top wall of the casing is connected to the An elastic device is arranged between the sliders.

In one embodiment, the elastic device is a spring sleeved on the push rod.

In one embodiment, the housing further has a bottom wall, and a second elastic device is provided between the bottom wall and the slider.

In one embodiment, the second elastic device is a spring sleeved on the push rod.

In one embodiment, the first magnet and/or the second magnet is an electromagnet, and the electromagnet includes a coil and an iron core.

In one embodiment, the cross-sectional profile of the slider at least partially matches the cross-sectional profile of the housing lumen.

In one embodiment, the shock absorbing device further includes a controller configured such that when the push rod moves upward, the first magnet and the second magnet generate an attractive force, and when the push rod moves upward, an attractive force is generated between the first magnet and the second magnet. When moving downward, the first magnet and the second magnet generate a repulsive force.

In one embodiment, the first magnet and/or the second magnet are electromagnets, and the controller is further configured such that when the push rod moves upward, the magnetism of the electromagnet follows the first magnet. It increases as the distance between one magnet and the second magnet increases.

In one embodiment, the first magnet and/or the second magnet are electromagnets, and the controller is further configured such that when the push rod moves downward, the magnetism of the electromagnet follows the The distance between the first magnet and the second magnet decreases and increases.

Compared with the prior art, the present invention has the following advantages and beneficial effects:

The shock absorbing device of the present invention includes a push rod disposed in the casing, and utilizes the attractive force or repulsive force generated between the top end of the push rod and a pair of magnets under the top wall of the casing to buffer the buffer force received by the push rod. In addition, a sliding block can be provided on the push rod, and the sliding block on the push rod can slide over the entire length of the inner cavity of the housing, and has a large stroke. Therefore, when applied to an AGV robot, even when driving on a bumpy road with great vibration, it can achieve a good shock absorption effect and meet the stability needs of the AGV robot in the process of handling goods.

Description of drawings

The above and other features of the present disclosure will be more fully understood from the following description and appended claims, taken in conjunction with the accompanying drawings. It is understood that these drawings depict only a few embodiments of the present disclosure and are therefore not to be considered limiting of the scope of the present disclosure. The content of the present application will be explained more clearly and in detail through the use of the accompanying drawings.

FIG. 1 is a schematic structural diagram of a shock absorbing device according to an embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a shock absorbing device according to another embodiment of the present invention.

FIG. 3 is a schematic structural diagram of a shock absorbing device according to another embodiment of the present invention.

List of reference numbers:

10 Damping device

6 shell

61 side wall

62 top wall

63 Bottom wall

64 lumen

5 putter

51 Bottom

52 top

1 first magnet

2 Second magnet

3 slider

4 elastic device

8 wheels

Detailed ways

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so as to more clearly understand the objects, features and advantages of the present invention. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solutions of the present invention.

Unless the context requires otherwise, throughout the specification and claims, the word "comprising" and variations thereof, such as "comprising" and "having", should be construed in an open, inclusive sense, i.e., should be interpreted as "including, but not limited to".

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily all referring to the same embodiment. Additionally, the particular features, structures or characteristics may be combined in any manner in one or more embodiments.

As used in this specification and the appended claims, the singular forms "a" and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise.

It should be noted that, in the claims and description of the present application, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or Any such actual relationship or order between these entities or operations is implied.

In the following description, for the purpose of illustrating various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of these specific details.

A shock absorption device proposed by the present invention can be applied to AGV trucks, and its purpose is to overcome the technical defects of insufficient resilience and poor shock absorption effect of the existing shock absorption device of AGV trucks, which affects the transportation of goods. stability. The present invention increases the resilience of the shock absorbing device through magnetic damping, thereby improving the shock absorbing effect, greatly increasing the stability of the goods against the bumpy road surface during the handling process, and improving the efficiency of the handling of the goods.

Referring first to FIG. 1 , FIG. 1 shows a schematic structural diagram of a shock absorbing device 10 according to an embodiment of the present invention. The damping device 10 includes a housing 6 , a push rod 5 , a first magnet 1 and a second magnet 2 .

As shown in the figure, the casing 6 has a substantially vertical cylindrical structure and is fixedly connected with the vehicle body of the transport robot. Specifically, the housing 6 has a cylindrical side wall 61 and a top wall 62 connected to the cylindrical side wall 61 . The housing 6 may be cylindrical with a cylindrical side wall 61 . It should be understood, however, that the housing 6 may also have other cylindrical shapes, such as polygonal prism shapes, as required. The top wall 62 is located at the top end of the cylindrical side wall 61 . The cylindrical side walls 61 and the top wall 62 together form a longitudinal inner cavity 64 of the housing 6 .

The push rod 5 is rod-shaped and extends longitudinally through the housing 6 . The bottom end 51 of the push rod 5 is associated with the wheel 8 , while the top end 52 of the push rod 5 extends beyond the top wall 62 of the housing 6 . In one embodiment, a sliding block 3 is provided on the push rod 5 , and the sliding block 3 is configured to be able to slide longitudinally along the inner cavity 64 of the housing 6 . In the illustrated embodiment, the sliding block 3 is fixed around the push rod 5 , but it should be understood that the fixing between the sliding block 3 and the push rod 5 can also be in other ways. For example, one radial side of the push rod 5 may be disposed close to the inner peripheral side (ie, the side wall 61 ) of the inner cavity 64 , and the other opposite radial side may be fixedly connected with the slider 3 . Preferably, the entire cross-sectional profile or a part of the cross-sectional profile of the slider 3 matches the cross-sectional profile of the inner cavity 64 , so that the slider 3 can slide longitudinally in the inner cavity 64 . In order for the push rod 5 to pass through the inner cavity 64 of the housing 6 , a perforation is provided in the top wall 62 . Preferably, the shape of the perforation corresponds to the cross-sectional shape of the push rod 5 .

The first magnet 1 is arranged at the top end 52 of the push rod 5 , and the second magnet 2 is arranged below the top wall 62 of the housing 6 . Therefore, the top wall 62 serves as a spacer that separates the first magnet 1 and the second magnet 2 from contact. The magnetism and polarity of the first magnet 1 and the second magnet 2 can be set as required, and the vibration can be buffered by the attractive force or the repulsive force between the first magnet 1 and the second magnet 2 . Preferably, the first magnet 1 and/or the second magnet 2 is an electromagnet, and the electromagnet includes a coil and an iron core. When only one of the first magnet 1 and the second magnet 2 is set as an electromagnet, in order to ensure a stable circuit arrangement of the electromagnet, the fixed magnet is usually set as an electromagnet, and the movable magnet is set as a permanent magnet. However, the arrangement of the electromagnets can also be selected according to space conditions. For example, in the embodiment shown in FIG. 2 , only the first magnet 1 is set as an electromagnet, because there is enough space around the first magnet 1 for circuit arrangement. The polarity of the electromagnet can be adjusted as required by switching the direction of the current.

In addition, in another embodiment shown in FIG. 3 , a bottom wall 63 is provided at the bottom of the housing 6 , and the bottom wall 63 can prevent the slider 3 from coming out from below the inner cavity 64 . The bottom wall 63 does not necessarily need to cover the entire bottom surface of the housing 6 , as long as it can form a stopper that prevents the slider 3 from further sliding and detaching from the inner cavity 64 .

In addition, in a preferred embodiment, an elastic device 4 is provided between the top wall 62 of the housing 6 and the slider 3 . For example, in the embodiment shown in FIGS. 1-3 , the elastic device 4 is a spring sleeved on the push rod 5 . Both ends of the spring abut against the top wall 62 of the housing 6 and the slider 3 respectively. In another embodiment shown in FIG. 3 , an elastic device is also provided between the bottom wall 63 of the housing and the slider 3 . In the embodiment shown in FIG. 3 , the elastic device is a spring sleeved on the push rod 5 . It should be understood, however, that the above-mentioned springs may also be replaced by elastic means formed, for example, by elastic wire mesh or elastomer sleeves.

Preferably, a controller (not shown) may be provided, and the controller is arranged such that when the push rod 5 moves upward relative to the stable position, the magnetic poles of the first magnet 1 and the second magnet 2 are opposite to each other by switching the current direction. Opposite magnetic poles, so as to generate attractive force to buffer the vibration force that pushes the push rod 5 upward; and when the push rod 5 moves downward relative to the stable position, the magnetic poles of the first magnet 1 and the second magnet 2 are opposite to each other by switching the current direction. The same magnetic pole, thereby generating a repulsive force to buffer the shock force that pushes the push rod 5 downward.

Furthermore, both the first magnet 1 and the second magnet 2 may be provided as electromagnets. At this time, the controller can be set so that when the push rod 5 moves upward, the magnetism of the first electromagnet 1 and the second electromagnet 2 increases with the increase of the distance between the first magnet 1 and the second magnet 2, thereby increasing the first electromagnet 1 and the second electromagnet 2. Attraction between an electromagnet 1 and a second electromagnet 2 . The controller can also be configured such that when the push rod 5 moves downward, the magnetism of the first electromagnet 1 and the second electromagnet 2 increases as the distance between the first magnet 1 and the second magnet 2 decreases, thereby increasing The repulsive force between the first electromagnet 1 and the second electromagnet 2 . The magnetism of the first electromagnet 1 and the second electromagnet 2 can be realized, for example, by setting a variable resistance in the circuit to adjust the current. It should be understood, however, that the current in the circuit can also be adjusted by other means known in the art to adjust the magnetism of the electromagnet. In addition, the increase or decrease of the magnetic properties of the first electromagnet 1 and the second electromagnet 2 may have a linear relationship or a non-linear relationship with the distance between the first magnet 1 and the second magnet 2 as required. In the actual working process, when the wheel 8 travels to a bumpy road, the wheel 8 is forced to slide the slider 3 upward, and the elastic device between the top wall 62 and the slider 3 is squeezed by the elastic device through the elastic device. The elastic force slows down part of the vibration force, and generates an attractive force between the first magnet 1 and the second magnet 2 , which further reduces the vibration force received by the second slider 3 . When the wheel 8 is forced to slide the slider 3 downward, the elastic force of the elastic device slows down part of the vibration force, and generates a repulsive force between the first magnet 1 and the second magnet 2, further reducing the vibration of the second slider 3 force. Therefore, the present invention increases the resilience of the shock absorber by providing magnetic damping on the entire sliding stroke of the slider 3 within the length of the inner cavity of the housing 6, thereby improving the shock absorber effect. The stability of the goods that can overcome the bumpy road surface during the handling process is greatly increased, and the efficiency of the goods handling is improved.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (10)

1. A shock absorbing device, comprising:

A housing having a cylindrical side wall and a top wall connected to a top end of the cylindrical side wall, the cylindrical side wall and the top wall defining a longitudinal interior cavity of the housing;

A push rod extending axially through the housing, a top end of the push rod extending beyond a top wall of the housing;

The first magnet is arranged at the top end of the push rod; and

A second magnet disposed below a top wall of the housing.

2. The shock absorbing device as set forth in claim 1, wherein a slider is provided on said push rod, said slider being fixed to said push rod and configured to be slidable along an inner cavity of said housing, and an elastic means is provided between a top wall of said housing and said slider.

3. The cushioning device of claim 2, wherein said resilient means is a spring mounted over said push rod.

4. The shock absorbing device as set forth in claim 2, wherein said housing further has a bottom wall, and a second resilient means is provided between said bottom wall and said slider.

5. The shock absorbing device as claimed in claim 4, wherein said second resilient means is a spring fitted over said push rod.

6. The damper device according to claim 1, wherein the first magnet and/or the second magnet is an electromagnet, and the electromagnet comprises a coil and an iron core.

7. The cushioning device of claim 2, wherein a cross-sectional profile of the slider at least partially matches a cross-sectional profile of the housing cavity.

8. The damper device according to claim 1, further comprising a controller configured such that the first magnet and the second magnet generate an attractive force when the pushrod moves upward and a repulsive force when the pushrod moves downward.

9. The shock absorbing device of claim 8, wherein the first magnet and/or the second magnet is an electromagnet, and the controller is further configured such that when the pushrod moves upward, the magnetic properties of the electromagnet increase as the distance between the first magnet and the second magnet increases.

10. The shock absorbing device of claim 8, wherein the first magnet and/or the second magnet is an electromagnet, and the controller is further configured such that when the pushrod moves downward, the magnetic properties of the electromagnet increase as the distance between the first magnet and the second magnet decreases.

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