Anti-vibration universal wheel

Abstract

The utility model relates to the technical field of universal wheels, in particular to an anti-vibration universal wheel. According to the key points of the technical scheme, the device comprises a foot stand, a roller set, a cardan shaft, an elastic piece and a guide part, the roller set is slidably installed on the foot stand, the elastic piece is contained in the foot stand, the cardan shaft is rotatably installed on the foot stand, the guide part comprises a guide piece, the guide piece is connected with the roller set and the elastic piece, the guide piece is provided with a limiting piece, and a limiting sliding groove is formed in the foot stand. The limiting sliding grooves limit the moving depth of the limiting pieces, the possibility that the rolling wheel sets collide with the foot stool is effectively reduced, the stability of the rolling wheel sets is improved, and the service life of the anti-vibration universal wheel is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of universal wheels, and in particular to a vibration-avoiding universal wheel. Background Art

[0002] A universal wheel is a movable caster, and its structure allows horizontal rotation of 360 degrees under dynamic or static load. The design of the universal wheel allows vehicles or equipment to move in multiple directions without changing their direction or turning. Therefore, it is widely used in related technologies in life. For example, Chinese utility model with announcement number CN206017559U discloses a vibration-damping universal wheel. The universal wheel generally includes a tripod, a roller group, an elastic member and a universal shaft. The roller group is rotatably set on the tripod, and the universal shaft is also rotatably set on the tripod. When the universal wheel is in use, the universal shaft is usually fixedly connected to other equipment, and the tripod can rotate in all directions relative to the universal shaft, thereby realizing that the moving direction of the equipment can be changed without changing the orientation of the equipment itself.

[0003] With respect to the above-mentioned related technologies, the roller group of the universal wheel is subjected to a large impact, and there is a possibility that the roller group collides with the tripod, resulting in a large damage to the roller group and shortening the service life of the universal wheel. Therefore, there is still a lot of room for improvement of the universal wheel. Utility Model Content

[0004] In order to improve the stability of the universal wheel roller assembly, the present application provides a vibration-avoiding universal wheel.

[0005] The vibration-proof universal wheel provided in the present application adopts the following technical solution:

[0006] A vibration-avoiding universal wheel comprises a tripod, a roller group, a universal shaft and an elastic member, wherein the universal shaft is rotatably arranged on the tripod, the elastic member is arranged on the tripod, and the tripod further comprises a guide member, wherein the roller group is slidably arranged on the tripod via the guide member, and the elastic member is connected to the guide member; the tripod is provided with a limiting groove, and the guide member has a limiting member which is slidably matched with the limiting groove to limit the roller group from colliding with the tripod.

[0007] Through the above technical solution: when the roller group is impacted, the guide member will drive the roller group to slide along the limiting slide groove to mitigate the impact; when the guide member moves, the limiting member slides in the limiting slide groove to limit the sliding depth of the guide member, thereby limiting the collision between the roller group and the tripod and extending the service life of the universal wheel.

[0008] Preferably, a mounting groove is provided inside the tripod, the limiting sliding groove is located on a groove wall provided in the mounting groove, and the guiding portion is accommodated in the mounting groove.

[0009] Through the above technical solution: The installation groove provides an assembly position for the guiding part and the elastic part, with a compact structure, making the installation of the guiding part and the elastic part more stable, so that the elastic part can achieve a better shock absorption effect.

[0010] Preferably, the elastic part is a spring, one end of which is fixedly arranged on the guiding part, and the other end abuts against the bottom of the installation groove.

[0011] Through the above technical solution: When the roller group is impacted, the guiding part moves along the limiting sliding groove, and at the same time compresses the spring. The impact is then converted into the elastic potential energy of the spring and released by the spring, effectively reducing the impact on the overall caster and extending the service life of the caster.

[0012] Preferably, the guiding part has a boss, and the periphery of the boss is provided with a rounded corner, and the end of the spring is sleeved on the boss.

[0013] Through the above technical solution: The position of the spring is limited by the boss, making the position of the spring more stable when it is compressed and restored, and the rounded corner on the boss is more conducive to the installation of the spring.

[0014] Preferably, the bottom of the installation groove has a positioning protrusion, and one end of the spring is sleeved on the outside of the positioning protrusion.

[0015] Through the above technical solution: Since the installation groove is slightly larger than the diameter of the spring, if the spring directly abuts against the bottom of the installation groove, the abutting position is not fixed. When the guiding part compresses the spring, the spring is unevenly stressed, causing greater damage to the spring. After the spring is sleeved on the positioning protrusion, the compression and restoration of the spring are more stable.

[0016] Preferably, the footrest includes

[0017] a connecting part, in which the universal shaft is rotatably arranged;

[0018] and an installation part, adjacent to the connecting part, for assembling the elastic part, the guiding part and the roller group.

[0019] Through the above technical solution: The elastic part is separated from the connecting part, so that the impact on the universal shaft is small, and the service life of the universal shaft is extended.

[0020] Preferably, the connecting part is detachably arranged on the universal shaft.

[0021] Through the above technical solution: When the footrest part is damaged, the footrest can be detached from the universal shaft through the connecting part. After replacing the new footrest, the footrest can be reinstalled on the universal shaft through the connecting part and can continue to be used, improving the practicality of the caster.

[0022] Preferably, the connecting part includes

[0023] A first connecting member, fixedly connected to the tripod;

[0024] And a second connecting member, connected to the first connecting member by a threaded fastener, and the first connection and the second connecting member are combined to form a space for assembling the universal shaft.

[0025] By the above technical solution: The fastener structure is simple and easy to operate, which is convenient to combine and fix the first connecting member and the second connecting member, and is also convenient to disassemble, making it more convenient and faster to replace the tripod. In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. When the roller group is impacted, the guiding member will drive the roller group to slide along the limiting chute to mitigate the impact. When the guiding member moves, the limiting member will slide in the limiting chute to limit the sliding depth of the guiding member, so as to limit the collision between the roller group and the tripod and extend the service life of the universal wheel.

[0027] 2. The installation groove provides an assembly position for the guiding portion and the elastic member, and the structure is compact, making the installation of the guiding portion and the elastic member more stable, so that the elastic member can achieve a better vibration damping effect.

[0028] 3. By defining the position of the spring through the boss, the position of the spring is more stable when it is compressed and restored, and the rounded corners on the boss are more conducive to the installation of the spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic structural view of a vibration-proof universal wheel in a preferred embodiment of the present application.

[0030] Figure 2 It is a cross-sectional view of the tripod in a preferred embodiment of the present application.

[0031] Figure 3 It is an exploded structural view of the vibration-proof universal wheel in a preferred embodiment of the present application.

[0032] Description of the reference numerals: 1. Tripod; 11. Installation portion; 111. Installation groove; 1111. Positioning protrusion; 112. Limiting chute; 113. Kidney-shaped hole; 12. Connecting portion; 121. First connecting member; 122. Second connecting member; 2. Elastic member; 3. Roller group; 31. Wheel body; 32. Connecting rod; 4. Guiding member; 41. Boss; 42. Limiting member; 5. Universal shaft; 51. Shaft body; 52. First shoulder; 53. Second shoulder. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The following will further describe the present application in detail Figures 1-3 with reference to the attached

[0034] The embodiment of the present application discloses a vibration-proof universal wheel.

[0035] Reference Figure 1 and Figure 2 ,the shock-absorbing universal wheel includes a tripod 1, an elastic member 2, a roller set 3 and a universal shaft 5. The roller set 3 is slidably mounted on the tripod 1. The elastic member 2 is connected to the roller set 3 and installed in the tripod 1 to provide shock absorption for the roller set 3. The universal shaft 5 is rotatably mounted on the tripod 1, and the tripod 1 can rotate omnidirectionally relative to the universal shaft 5. The tripod 1 is installed on the corresponding carrier through the universal shaft 5 to provide movement for the carrier.

[0036] Refer to Figure 1 and Figure 2 ,the tripod 1 provides an assembly position for the roller set 3, the universal shaft 5 and the elastic member 2. Specifically, the tripod 1 includes a connecting portion 12 and a mounting portion 11. Among them, the mounting portion 11 includes a mounting groove 111, a limiting sliding groove 112 and a waist-shaped hole 113. The elastic member 2 is accommodated in the mounting groove 111, and the roller set 3 is slidably mounted on the tripod 1 through the waist-shaped hole 113.

[0037] Specifically, to improve the overall impact resistance of the shock-absorbing universal wheel, the mounting groove 111 is opened inside the tripod 1. The mounting groove 111 has a long straight groove profile. The elastic member 2 is accommodated in the mounting groove 111. The elastic member 2 is connected to the tripod 1 and the roller set 3 respectively. The elastic member 2 reduces the impact force for the roller set 3.

[0038] Specifically, in this embodiment, the elastic member 2 is a spring. One end of the spring abuts against the bottom of the mounting groove 111. The spring has good stability and strong load capacity. By stretching and absorbing energy, the impact on the overall universal wheel is effectively reduced, and the service life of the universal wheel is extended.

[0039] It should be specially noted that to improve the assembly stability of the spring, the bottom of the mounting groove 111 also has a positioning protrusion 1111. One end of the spring is fixedly sleeved outside the positioning protrusion 1111. After being positioned by the positioning protrusion 1111, the force on the spring is more uniform, and the compression and restoration processes of the spring are also more stable.

[0040] Refer to Figure 2 and Figure 3 ,specifically, to improve the overall installation stability of the shock-absorbing universal wheel, the roller set 3 includes two sets of wheel bodies 31 and a connecting rod 32. Among them, the connecting rod 32 is rotatably mounted in the tripod 1. The two sets of wheel bodies 31 are respectively fixedly mounted at both ends of the connecting rod 32 and are respectively close to the opposite sides of the tripod 1. The roller set 3 can rotate relative to the tripod 1. Setting two sets of wheel bodies 31 makes the force on the tripod 1 more balanced and can withstand stronger impacts.

[0041] Refer to Figure 3, specifically, the other end of the elastic member 2 is connected to the roller set 3. Among them, the shock-absorbing universal wheel further includes a guiding member 4. The guiding member 4 is a block structure, accommodated in the installation groove 111, and can slide in the installation groove 111. There is a boss 41 on the top of the guiding member 4. The periphery of the boss 41 is provided with rounded corners. The other end of the spring is fixedly sleeved and installed on the boss 41. The boss 41 defines the position of the spring, making the position of the spring more stable when compressed and restored, and the rounded corners on the boss 41 are more conducive to the installation of the spring.

[0042] The guiding member 4 is provided with a through hole for the rotational installation of the connecting rod 32. Two identical waist-shaped holes 113 are respectively opened on the side walls on both sides of the footrest 1. The extending direction of the waist-shaped holes 113 is set along the force-bearing direction of the spring, and the waist-shaped holes 113 communicate with the installation groove 111. The connecting rod 32 passes through the waist-shaped holes 113 and is rotationally installed in the through hole of the guiding member 4. Then the roller set 3 is slidably installed on the footrest 1, and the spring is connected to the roller set 3 through the guiding member 4.

[0043] When the roller set 3 is impacted, the roller set 3 connected to the guiding member 4 moves along the waist-shaped holes 113. At the same time, the guiding member 4 compresses the spring, and the impact force is converted into the elastic potential energy of the spring, reducing the impact on the overall shock-absorbing universal wheel. However, at this time, if the impact force received by the roller set 3 is relatively large, the moving distance of the guiding member 4 is relatively long. The connecting rod 32 installed in the guiding member 4 is restricted by the waist-shaped holes 113, and the connecting rod 32 will collide with the footrest 1. In the long run, it will cause great damage to the roller set 3 and the footrest 1, resulting in a shortened service life of the universal wheel.

[0044] Reference Figure 2 and Figure 3 , based on this, the limiting chute 112 is recessed on the groove wall of the installation groove 111. The guiding member 4 is provided with a limiting member 42 that slidably cooperates with the limiting chute 112. Specifically, the limiting chute 112 is opened along the force-bearing direction of the spring, and the depth of the limiting chute 112 is shorter than the depth of the installation groove 111. Therefore, the limiting chute 112 defines the deepest moving distance of the guiding member 4, restricting the roller set 3 from colliding with the footrest 1.

[0045] The limiting member 42 is a strip-shaped protrusion, located on the side wall of the guiding member 4, and is integrally connected with the guiding member 4. The overall structure is relatively stable. The limiting member 42 cooperates with the limiting chute 112, effectively reducing the possibility of the roller set 3 colliding with the footrest 1 and extending the service life of the universal wheel.

[0046] In this embodiment, the universal shaft 5 is a shaft body 51 with two limiting shoulders. The two shoulders are respectively defined as the first shoulder 52 and the second shoulder 53. Both shoulders are integrally connected with the shaft body 51. The first shoulder 52 and the second shoulder 53 are respectively clamped on the top and bottom of the connecting portion 12, thereby realizing the omnidirectional rotational installation of the footrest 1.

[0047] Reference Figure 2 and Figure 3 The connecting portion 12 is connected to the mounting portion 11, and the universal shaft 5 is rotatably mounted in the connecting portion 12. If the elastic member 2 and the connecting portion 12 are arranged at the same place, when the roller group 3 is impacted, the universal shaft 5 will also be subjected to a large impact. Therefore, the elastic member 2 and the connecting portion 12 are separately arranged, so that the impact on the universal shaft 5 is small, and the influence on the universal shaft 5 due to the impact is reduced.

[0048] Wherein, the connecting portion 12 includes a first connecting member 121 and a second connecting member 122. The first connecting member 121 is integrally connected to the footrest 1, and the first connecting member 121 has a semi-circular groove. The second connecting member 122 also has the same semi-circular groove. When the first connection and the second connecting member 122 are joined, the two semi-circular grooves are joined to form a complete mounting hole for the universal shaft 5 to be assembled. The second connecting member 122 and the first connecting member 121 are detachably connected by screw fasteners. When a part of the footrest 1 is damaged, the screws can be removed, and the footrest 1 can be removed from the universal shaft 5 through the disassembly of the connecting portion 12. After replacing the new footrest 1, the screws are tightened, and the footrest 1 is reinstalled on the universal shaft 5 through the joining of the connecting portion 12, realizing the detachable installation of the connecting portion 12, and the fastener structure is simple and easy to operate, and the disassembly and installation processes are simple and fast.

[0049] When the shock-absorbing universal wheel is installed on the heavy object transfer rack and the transfer road condition is bad, the impact on the footrest 1 is large, and the loss of the footrest 1 will also increase, so the frequency of replacing the footrest 1 will also increase. Here, the detachable installation of the connecting portion 12 is more convenient for replacing the footrest 1.

[0050] The implementation principle of a shock-absorbing universal wheel in an embodiment of the present application is as follows: waist-shaped holes 113 are opened on both side walls of the footrest 1, a mounting groove 111 is opened in the footrest 1, the connecting member and the elastic member 2 are accommodated in the mounting groove 111, the guiding member 4 connects the roller group 3 and the elastic member 2, the roller group 3 moves along the waist-shaped holes 113, the guiding member 4 compresses the spring for shock absorption, limiting members 42 are arranged on both side walls of the guiding member 4, and limiting sliding grooves 112 are opened on the groove wall of the mounting groove 111. The limiting grooves limit the deepest moving distance of the limiting members 42, and limit the impact between the roller group 3 and the footrest 1.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A shock-absorbing universal wheel, comprising a tripod (1), an elastic member (2), a roller set (3) and a universal shaft (5), the universal shaft (5) is rotatably arranged on the tripod (1), the elastic member (2) is arranged on the tripod (1), and it is characterized in that: It further includes a guide member (4), the roller group (3) is slidably arranged on the tripod (1) through the guide member (4), and the elastic member (2) is connected to the guide member (4); a limiting chute (112) is formed in the tripod (1), and a limiting member (42) slidably engaged with the limiting chute (112) is provided on the guide member (4) to limit the roller group (3) from impacting the tripod (1).

2. The vibration-damping universal wheel according to claim 1, wherein: An installation groove (111) is formed inside the tripod (1), the limiting chute (112) is located on the groove wall of the installation groove (111), and the guide member (4) is accommodated in the installation groove (111).

3. The vibration-isolation universal wheel according to claim 2, characterized in that: The elastic member (2) is a spring, one end of which is fixedly arranged on the guide member (4), and the other end abuts against the bottom of the installation groove (111).

4. The vibration-isolation universal wheel according to claim 3, characterized in that: The guide member (4) has a boss (41), and a fillet is provided on the periphery of the boss (41), and the end of the spring is sleeved on the boss (41).

5. The vibration-isolation universal wheel according to claim 3, characterized in that: The bottom of the installation groove (111) has a positioning protrusion (1111), and one end of the spring is sleeved on the outside of the positioning protrusion (1111).

6. The vibration-isolating universal wheel according to claim 1, wherein: The tripod (1) includes a connecting portion (12), the universal shaft (5) is rotatably arranged in the connecting portion (12); and an installation portion (11), which is connected to the connecting portion (12) and is used for assembling the elastic member (2), the guide member (4) and the roller group (3).

7. The vibration-damping universal wheel according to claim 6, characterized in that: The connecting portion (12) is detachably arranged on the universal shaft (5).

8. The vibration-isolation universal wheel according to claim 6, wherein: The connecting portion (12) includes a first connecting member (121), which is fixedly connected to the tripod (1); and a second connecting member (122), which is connected to the first connecting member (121) through a threaded fastener, and the first connecting member (121) and the second connecting member (122) are combined to form a space for assembling the universal shaft (5).

Images