CN111731036A - A vibration damping caster - Google Patents

Abstract

The invention relates to the technical field of casters, in particular to a vibration-damping caster, comprising a caster bracket, a wheel mounted on the lower part of the caster bracket, and a mounting structure arranged on the upper part of the caster bracket for connecting carrying equipment. A frame, a fixing frame, and at least one set of springs and a fixing rod, and the vibration-damping frame is an integrally formed structure; the present invention is a vibration-damping caster, which utilizes the lever principle vibration-damping mechanism formed by the support body, the vibration-damping frame and the spring. The vibration effect is better, and the upper end of the spring is pressed down by the pressure plate on the vibration damping frame, which has high structural strength, good load-bearing performance, better stability and durability, and the structural design occupies less space in the longitudinal space. The longitudinal swing space of the vibration damping frame is large, and the supporting member is threadedly connected to the lower end of the fixing rod, which is convenient for disassembly and assembly.

Description

A vibration damping caster

technical field

The invention relates to the technical field of casters, in particular to a vibration-damping caster.

Background technique

Caster is a common mechanical hardware accessory, which is widely used at the bottom of carrying equipment (such as furniture, carts, machining equipment, medical equipment) to facilitate the movement of carrying equipment. When it is on the ground, there will be a large vibration, which will not only affect the carrying equipment and the use experience, but also affect the life of the caster. At present, some existing casters also have the function of damping vibration, but generally they are directly loaded and damped by springs. Moreover, the loss of the spring is also large, and the vibration damping function is easy to fail.

SUMMARY OF THE INVENTION

In order to overcome the defects existing in the prior art, the task of the present invention is to provide a vibration-damping caster, which utilizes a vibration-damping mechanism based on the lever principle formed by the cooperation of a bracket body, a vibration-damping frame and a spring, which has good vibration-damping effect and is effective against the spring. The requirements and losses are smaller, and the overall structure is more stable and durable, which is beneficial to improve the service life of the casters.

The task of the present invention is achieved through the following technical solutions:

A vibration-damping caster comprises a caster bracket, a wheel mounted on the lower part of the caster bracket, and a mounting structure arranged on the upper part of the caster bracket for connecting carrying equipment; the caster bracket includes a bracket body, a vibration-damping frame, a fixing frame, and at least one set of The spring, the fixing rod, and the shock-absorbing frame are integrally formed, including two inner side plates arranged vertically side by side and a pressure plate laterally connecting the upper ends of the front parts of the two inner side plates. Hinged; the bracket body is an integral molding structure, including two outer plates arranged vertically side by side and a top plate laterally connecting the upper ends of the two outer plates, the two outer plates are arranged on the outside of the two inner plates, and the lower end of the rear of each outer plate is They are respectively hinged with the corresponding inner plates through hinge shafts. The hinge shafts are arranged in parallel with the wheel shafts and the hinge shafts are located in front of the wheel shafts. The fixing frame is horizontally fixed to connect the two outer plates and is located between the top plate and the pressure plate. The fixing rod is arranged through the pressure plate. The upper end of the fixing rod is connected to the fixing frame, the lower end of the fixing rod is threadedly connected to the supporting member, the spring is sleeved outside the corresponding fixing rod, and the upper and lower ends of the spring are respectively abutted against the pressure plate and the supporting member.

Preferably, the supporting member is a nut, or the supporting member is a combination of a nut and a supporting plate.

Preferably, both ends of the fixing frame are respectively provided with downwardly bent connecting parts, and the two connecting parts are respectively attached to the inner walls of the two outer side plates and are fixedly connected by bolts or rivets. Each of the inner side plates is located between the two connecting parts, so that the fixing frame can limit the position of the shock-absorbing frame in the left-right direction.

Preferably, a gap is provided between the front portions of the two inner side panels and the corresponding outer side panels, and the connecting portion is located in the gap between the corresponding inner side panels and the outer side panels.

Preferably, the through hole is a long hole arranged in the front-rear direction, and the vibration damping frame can move relative to the fixing rod within the range of the through hole.

Preferably, the upper end of the fixing rod is fixedly connected to the fixing frame, or the upper end of the fixing rod is fixedly provided with an upper end head, and the fixing rod passes through the hole on the fixing frame and is hung on the fixing frame through the upper end head.

Preferably, the mounting structure is connected to the bracket body through a turntable assembly that can rotate horizontally. The turntable assembly includes an upper wave plate, a lower wave plate, a plurality of first balls, a plurality of second balls and fasteners, and the top plate is located on the upper wave plate. Between the plate and the lower wave plate, an annular connecting portion is provided on the top plate, the lower surface of the upper wave plate and the upper surface of the annular connecting portion are respectively provided with a first annular groove and a second annular groove opposite to each other, and the lower surface of the annular connecting portion is respectively provided with a first annular groove and a second annular groove. The surface and the upper surface of the lower wave plate are respectively provided with a third ring groove and a fourth ring groove, and the cross-sections of the first ring groove, the second ring groove, the third ring groove and the fourth ring groove are all concave arc structures, The first ball is arranged between the first ring groove and the second ring groove, the second ball is arranged between the third ring groove and the fourth ring groove, and the caster bracket and the turntable assembly pass through the first ball and the second ring. The balls are connected in rotation, the fasteners vertically pass through the center holes of the upper wave plate and the lower wave plate in turn and are fastened together, and the mounting structure is fixedly connected to the upper wave plate or the fastener .

Preferably, the perforated edge of the upper wave plate and the perforated edge of the lower wave plate are in close contact with each other under the action of the fastener, and both the perforated inner wall of the upper wave plate and the perforated inner wall of the lower wave plate are in contact with each other. The outer sidewall of the fastener is in close contact, the second annular groove and the third annular groove are arranged staggered in the radial direction of the annular connecting portion, and the second annular groove is located radially outside the third annular groove.

Preferably, the mounting structure is fixedly connected to the top plate, or the mounting structure and the top plate are integrally formed.

Preferably, the mounting structure is one of a mounting plate, a rod, a screw, and a socket.

Compared with the prior art, a vibration-damping caster of the present invention has the following advantages: 1. the wheel will jump upward when driving on uneven ground, thereby driving the vibration-damping frame to deflect counterclockwise around the hinge axis, and then passing the vibration-damping frame on the The pressure plate compresses the spring downwards, so that the vibration of the wheel is absorbed and filtered by the spring, and the vibration reduction of the caster is realized. The lever principle vibration reduction mechanism formed by the frame and the spring cooperates, and the vibration reduction effect is better, and the use of the lever principle can effectively reduce the load of the spring, the requirements for the spring are small, and the loss of the spring can be reduced, so that the vibration reduction in the present application can be reduced. The mechanism is more stable and durable, and has a longer service life; and the horizontal arrangement of the spring in this embodiment can reduce the height of the overall caster, save space, and make the coordination between the vibration damping frame and the bracket body more compact, and the structure design is ingenious; ② When the load-bearing equipment carried above the caster bracket is heavy, the jumping generated by the different convex and concave parts of the wheel will cause a very large instantaneous impact force at the contact between the upper end of the spring and the vibration damping frame. The pressure plate on the frame presses down the upper end of the spring, and the contact area between the pressure plate and the upper end of the spring is relatively large, and the pressure plate and the vibration damping frame are integrally formed, with high structural strength, so that the pressure plate and the upper end of the spring have good bearing performance. And it is not easy to be loosened or damaged under the action of repeated instantaneous impact force, and the stability and durability are better; The instantaneous impact force at the upper end is filtered and absorbed by the spring, and the impact force transmitted to the lower end of the spring will be relatively small, so the support member can support the impact force of the lower end of the spring for a long time and stably without loosening. Loosening the support member to adjust the preload of the spring and then adjust the vibration damping performance, and because the lower end (free end) of the fixing rod and the support member occupy less space in the longitudinal space, the longitudinal swing space of the vibration damping frame can be made smaller. It is large, and the supporting part is threadedly connected to the lower end (free end) of the fixing rod, which is easy to disassemble and assemble; ③ The vibration damping frame is located between the two connecting parts of the fixing frame, and the inner side plate of the vibration damping frame and the connecting part of the fixing frame The gap is small, so that the fixing frame can limit the position of the shock-absorbing frame in the left and right directions, so that the shock-absorbing frame will not or as little as possible sway from side to side when it sways in the longitudinal direction, thereby avoiding or reducing the fixing rod and spring. Risk of damage due to lateral torsion and can increase the structural strength and durability of the caster as a whole.

The concept, specific structure and effects of the present invention will be further described below with reference to the accompanying drawings, so as to fully understand the purpose, features and effects of the present invention.

Description of drawings

Fig. 1 is the structural representation of the damping type caster of the present invention;

Fig. 2 is the structural representation of another angle of the vibration damping type caster of the present invention;

FIG. 3 is an exploded view of the structure of the vibration-damping caster of the present invention.

Among them: caster bracket 1, bracket body 11, outer plate 111, top plate 112, vibration damping frame 12, inner plate 121, pressure plate 122, through hole 123, fixing frame 13, connecting part 131, spring 14, fixing rod 15, nut 152, support plate 153, upper end head 154, wheel 2, axle 21, mounting plate 3, hinge shaft 4, turntable assembly 5, upper wave plate 51, lower wave plate 52, first ball 53, second ball 54, fastening Piece 55.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

It should be noted that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or indirectly connected through an intervening element. Additionally, the terms "upper," "lower," "left," "right," "front," "rear," "horizontal," "vertical," and similar expressions used herein are for Not meant to be the only implementation.

As shown in Figure 1-3, the vibration-damping caster includes a caster bracket 1, a wheel 2 mounted on the lower part of the caster bracket 1, and a mounting plate 3 arranged on the upper part of the caster bracket 1 for connecting the carrying equipment. The caster bracket 1 includes a bracket body 11. The vibration-damping frame 12, the fixing frame 13, and a set of springs 14 and fixing rods 15. The vibration-damping frame 12 is an integrally formed structure, including two inner side plates 121 arranged vertically side by side and a front side connecting the two inner side plates 121 horizontally. The rear parts of the two inner plates 121 are hinged with the axles 21 on both sides of the wheel 2 respectively; the bracket body 11 is an integrally formed structure, including two vertically juxtaposed outer plates 111 and two laterally connected The top plate 112 at the upper end of the outer plate 111, the two outer plates 111 are arranged outside the two inner plates 121, and the lower rear end of each outer plate 111 is hinged with the corresponding inner plate 121 through the hinge shaft 4, the hinge shaft 4 and the wheel shaft 21 The hinge shafts 4 are arranged in parallel and spaced in front of the axles 21. The fixing frame 13 is laterally fixedly connected to the two outer plates 111 and is located between the top plate 112 and the pressing plate 122. The fixing rod 15 passes through the through hole 123 provided on the pressing plate 122. The upper end of 15 is connected to the fixing frame 13, the lower end is threadedly connected to the supporting piece, the supporting piece is a combination of the nut 152 and the supporting plate 153, the spring 14 is sleeved outside the corresponding fixing rod 15, and the upper and lower ends of the spring 14 are respectively abutted Pressing plate 122 and pallet 153.

When the vibration-damping caster of the present invention is in use, the wheel 2 will jump upward when driving on uneven ground, thereby driving the vibration-damping frame 12 to deflect counterclockwise around the hinge shaft 4 , and then being compressed downward by the pressure plate 122 on the vibration-damping frame 12 The spring 14 is used to absorb and filter the beating of the wheel 2 through the spring 14, so as to realize the vibration reduction of the caster. Compared with the traditional spring 14 direct load-bearing type vibration reduction structure, the vibration reduction caster of the present invention also has the following advantages: 1. The lever principle vibration reduction mechanism formed by the cooperation of the bracket body 11, the vibration reduction frame 12 and the spring 14, the vibration reduction effect is better. Good, and the use of the lever principle can effectively reduce the load of the spring 14, the requirements for the spring 14 are small, and the loss of the spring 14 can be reduced, so that the vibration damping mechanism in this application is more stable and durable, and has a longer service life; and this implementation The horizontal arrangement of the spring 14 in the example can reduce the height of the whole caster and save space, so that the coordination between the vibration damping frame 12 and the bracket body 11 is more compact, and the structural design is ingenious; ② The load-bearing, stability and durability are better , because when the load-bearing equipment carried above the caster bracket 1 is very heavy, the jumping generated by the different convex and concave driving of the wheel 2 will cause the contact between the upper end of the spring 14 and the shock-absorbing frame 12 to repeatedly generate a very large instantaneous impact force. Based on this Considering that in the present application, the upper end of the spring 14 is pressed downward by the pressing plate 122 on the vibration damping frame 12, the contact area between the pressing plate 122 and the upper end of the spring 14 is relatively large, and the pressing plate 122 and the vibration damping frame 12 are integrally formed in a structure with high structural strength, Thereby, the bearing performance of the upper end of the pressure plate 122 and the upper end of the spring 14 is good, and it is not easy to be loosened or damaged under the action of repeated instantaneous impact force, and the stability and durability are better; The free end) is threaded to support the lower end of the spring 14. Since the instantaneous impact force of the upper end of the spring 14 is filtered and absorbed by the spring 14, the impact force transmitted to the lower end of the spring 14 will be relatively small, so the support can be Long-term and stable support of the impact force of the lower end of the spring 14 and not easy to loosen, at the same time, the preload of the spring 14 can be adjusted by tightening or loosening the support member to adjust the vibration damping performance, and because the lower end (free end) of the fixed rod 15 And the supporting member occupies less space in the longitudinal space, so the longitudinal swing space of the vibration damping frame 12 can be larger, and the supporting member is threadedly connected to the lower end (free end) of the fixing rod 15, which is convenient for disassembly and assembly.

Both ends of the fixing frame 13 are respectively provided with connecting parts 131 bent downward. The two connecting parts 131 are respectively attached to the inner walls of the two outer side plates 111 and are fixedly connected by bolts or rivets. The two inner side plates of the vibration damping frame 12 121 is located between the two connecting parts 131 with a small gap (about 1mm), so that the fixing frame can limit the position of the shock absorber in the left and right directions, so that when the shock absorber is swayed longitudinally, it will not or completely. There may be less side-to-side shaking, thereby avoiding or reducing the risk of damage to the fixed rod and spring due to lateral torsion, and can increase the structural strength and durability of the entire caster.

There is a gap between the front parts of the two inner side panels 121 and the corresponding outer side panels 111, and the connecting part 131 is located in the gap between the corresponding inner side panels 121 and the outer side panels 111; this design can more reasonably utilize the longitudinal space of the caster bracket 1, Increase the longitudinal rocking space of the shock absorber 12 as much as possible.

The through hole 123 is a long hole arranged in the front-rear direction, and the vibration damping frame 12 can move relative to the fixing rod 15 within the range of the through hole 123 , so that the vibration damping frame 12 can swing freely and smoothly.

An upper end head 154 is fixed on the upper end of the fixing rod 15 , and the fixing rod 15 passes through the hole on the fixing frame 13 and is hung on the fixing frame 13 through the upper end head 154 .

The mounting plate 3 is connected to the bracket body 11 through a turntable assembly 5 that can rotate horizontally. The turntable assembly 5 includes an upper wave plate 51, a lower wave plate 52, a plurality of first balls 53, a plurality of second balls 54 and fasteners 55. The top plate 112 is located at Between the upper wave plate 51 and the lower wave plate 52, an annular connecting portion is provided on the top plate 112, and the lower surface of the upper wave plate 51 and the upper surface of the annular connecting portion are respectively provided with a first annular groove and a second annular groove. The lower surface of the connecting portion and the upper surface of the lower wave plate 52 are respectively provided with a third ring groove and a fourth ring groove, and the cross sections of the first ring groove, the second ring groove, the third ring groove and the fourth ring groove are all The concave arc structure, the first ball 53 is arranged between the first ring groove and the second ring groove, the second ball 54 is arranged between the third ring groove and the fourth ring groove, and the caster bracket 1 and the turntable assembly 5 pass through the first ring groove. A ball 53 and a second ball 54 are connected in rotation, the fasteners 55 vertically pass through the holes in the center of the upper wave plate 51 and the lower wave plate 52 and are fastened together, and the mounting plate 3 is fixedly connected to the upper wave plate 51 or fastener 55.

The perforated edge of the upper wave plate 51 and the perforated edge of the lower wave plate 52 are tightly attached to each other under the action of the fastener 55. The outer side wall of 55 is close to each other, and the design makes the upper wave plate 51 and the lower wave plate 52 support each other in the circumferential direction, and the two ends of the fastener 55 are respectively mutually radially with the upper wave plate 51 and the lower wave plate 52. and the side walls of the fastener 55 and the upper wave plate 51 and the lower wave plate 52 are mutually supported in the radial direction, so that the turntable assembly 5 of the caster bracket 1 has excellent overall structural strength, stability and load-bearing capacity. The second ring groove and the third ring groove are staggered in the radial direction of the annular connecting portion, and the second ring groove is located radially outside the third ring groove, which can not only reduce the thickness of the rotating part of the caster bracket 1, but also increase the stability sex.

The above description is only a preferred embodiment of the present application and an illustration of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to the technical solution formed by the specific combination of the above-mentioned technical features, and should also cover, without departing from the inventive concept, the above-mentioned technical features or their Other technical solutions formed by any combination of equivalent features. For example, a technical solution is formed by replacing the above features with the technical features disclosed in this application (but not limited to) with similar functions.

Claims (10)

1. A vibration-damping caster, characterized in that it comprises a caster bracket, a wheel mounted on the lower part of the caster bracket, and a mounting structure arranged on the upper part of the caster bracket for connecting carrying equipment, the caster bracket comprising a bracket body, a vibration-damping frame, a fixed frame, and at least one set of springs and fixing rods, the vibration damping frame is an integrally formed structure, including two inner side plates arranged vertically side by side and a pressing plate laterally connecting the upper ends of the front parts of the two inner side plates, the rear parts of the two inner side plates are respectively connected with The axles on both sides of the wheel are hinged; the bracket body is an integral molding structure, including two outer plates arranged vertically side by side and a top plate laterally connecting the upper ends of the two outer plates, the two outer plates are arranged outside the two inner plates, and each The lower end of the rear part of the outer side plate is hinged with the corresponding inner side plate respectively through a hinge shaft. The hinge shaft and the wheel shaft are arranged in parallel and spaced apart and the hinge shaft is located in front of the wheel shaft. The rod passes through the through hole provided on the pressing plate, the upper end of the fixing rod is connected to the fixing frame, the lower end is threadedly connected to the supporting member, the spring is sleeved outside the corresponding fixing rod, and the upper and lower ends of the spring abut against the pressing plate and the supporting member respectively. 2 . The vibration-damping caster according to claim 1 , wherein the supporting member is a nut, or the supporting member is a combination of a nut and a supporting plate. 3 . 3 . The vibration-damping caster according to claim 1 , wherein two ends of the fixing frame are respectively provided with connecting parts bent downward, and the two connecting parts are respectively connected with the inner walls of the two outer side plates. 4 . The two inner side plates of the shock-absorbing frame are located between the two connecting parts, so that the fixing frame can limit the position of the shock-absorbing frame in the left and right directions. 4 . The vibration-damping caster according to claim 3 , wherein a gap is provided between the front parts of the two inner side panels and the corresponding outer side panels, and the connecting parts are located at the corresponding inner side panels and the outer side panels. 5 . in the gap between. 5 . The vibration-damping caster according to claim 1 , wherein the through hole is a long hole arranged in the front-rear direction, and the vibration-damping frame can move relative to the fixing rod within the range of the through hole. 6 . 6 . The vibration-damping caster according to claim 1 , wherein the upper end of the fixing rod is fixedly connected to the fixing frame, or the upper end of the fixing rod is fixedly provided with an upper end head, and the fixing rod passes through. 7 . Perforations on the fixing frame and hanging on the fixing frame through the upper end. 7 . The vibration-damping caster according to claim 1 , wherein the mounting structure is connected to the bracket body through a turntable assembly that can rotate horizontally, and the turntable assembly includes an upper wave plate, a lower wave plate, a plurality of A ball, a plurality of second balls and fasteners, the top plate is located between the upper wave plate and the lower wave plate, the top plate is provided with an annular connecting portion, and the lower surface of the upper wave plate and the upper surface of the annular connecting portion are respectively opposite. There are a first ring groove and a second ring groove, the lower surface of the annular connecting part and the upper surface of the lower wave plate are respectively provided with a third ring groove and a fourth ring groove, the first ring groove, the second ring groove, the third ring groove The cross-sections of the ring groove and the fourth ring groove are both concave arc structures, the first ball is arranged between the first ring groove and the second ring groove, and the second ball is arranged between the third ring groove and the fourth ring groove. During the time, the caster bracket and the turntable assembly are rotatably connected through the first ball and the second ball. The installation structure is fixedly connected to the upper wave plate or the fastener. 8 . The vibration-damping caster according to claim 7 , wherein the perforated edge of the upper wave plate and the perforated edge of the lower wave plate are tightly attached to each other under the action of the fastener, and the upper Both the perforated inner side wall of the wave plate and the perforated inner side wall of the lower wave plate are in close contact with the outer side wall of the fastener, and the second annular groove and the third annular groove are arranged staggered in the radial direction of the annular connecting portion, And the second annular groove is located radially outside the third annular groove. 9 . The vibration-damping caster according to claim 1 , wherein the mounting structure is fixedly connected to the top plate, or the mounting structure and the top plate are integrally formed. 10 . 10 . The vibration-damping caster according to claim 1 , wherein the mounting structure is one of a mounting plate, an insertion rod, a screw rod, and an insertion hole. 11 .

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