Detachable trundle

Abstract

The utility model relates to the technical field of trundles, and particularly discloses a detachable trundle which comprises a trundle frame and idler wheels rotationally connected to the two sides of the trundle frame, a rotating shaft is arranged between the idler wheels on the two sides, a vertical shaft hole is formed in the top of the trundle frame, a vertical shaft is arranged in the shaft hole, and a sliding groove is formed in the side, away from the vertical shaft, of the trundle frame. A locking piece is slidably connected into the sliding groove, a pressing portion is arranged at one end of the locking piece, a stroke hole for the vertical shaft to move is formed in the locking piece, a locking hole is formed in the end, away from the pressing portion, of the stroke hole, the inner width of the stroke hole is larger than or equal to the outer diameter of the vertical shaft, and the diameter of the locking hole is smaller than the outer diameter of the vertical shaft. An annular groove allowing the inner wall of the locking hole to be inserted therein is formed in the vertical shaft in the circumferential direction, and a cushioning assembly is arranged between the rolling wheels on the two sides. The detachable trundle has the effects of being easy to disassemble and assemble and cushioning.

Description

Technical Field

[0001] This application relates to the field of caster technology, and in particular to a detachable caster. Background Technology

[0002] Most bags sold on the market are equipped with casters for easy handling and movement. These types of casters generally include a support base and rollers. The rollers are fixed to the support base and can rotate relative to the support base.

[0003] In related technologies, luggage casters include a mounting base for installation on the bottom of the luggage. The mounting base is rotatably mounted on a vertical shaft, and a wheel frame is connected to the lower end of the vertical shaft. Rollers are rotatably connected to both sides of the wheel frame. The luggage can move in all directions by rotating the wheel frame relative to the mounting base and rotating the rollers.

[0004] In the aforementioned luggage casters, the mounting base is generally connected to the luggage via fasteners. When the rollers are severely worn or the shock-absorbing components are aged, the entire luggage needs to be disassembled to remove the casters, which is quite troublesome. Utility Model Content

[0005] To facilitate disassembly, this application provides a detachable caster.

[0006] The detachable caster provided in this application adopts the following technical solution:

[0007] A detachable caster includes a wheel frame and rollers rotatably connected to both sides of the wheel frame. A pivot is provided between the rollers on both sides. A vertically arranged pivot hole is opened at the top of the wheel frame, and a vertical pivot is provided inside the pivot hole. A sliding groove is opened on the side of the wheel frame away from the vertical pivot. A locking member is slidably connected in the sliding groove. One end of the locking member is a pressing part. The locking member has a travel hole for the vertical pivot to move. A locking hole is provided at the end of the travel hole away from the pressing part. The inner width of the travel hole is greater than or equal to the outer diameter of the vertical pivot. The diameter of the locking hole is smaller than the outer diameter of the vertical pivot. An annular groove is opened circumferentially on the vertical pivot for the inner wall of the locking hole to be inserted. A shock-absorbing component is provided between the rollers on both sides.

[0008] By adopting the above technical solution, when the caster needs to be disassembled, the pressing part is pushed inward, causing the locking part to move inward and the vertical shaft to move along the travel hole. At this time, the annular groove is disengaged from the locking hole, and the wheel frame and roller can be removed from the vertical shaft, thereby realizing the quick disassembly of the caster. The disassembly process is more convenient and faster. The shock absorption component can absorb energy when the roller is impacted, effectively reducing the vibration of the wheel, improving the stability and comfort during movement, and extending the service life of the wheel.

[0009] Optionally, a stop block is provided in the sliding groove, and a first fixing post is provided on the inner wall of the travel hole. A return spring is sleeved on the first fixing post, with one end of the return spring abutting against the stop block and the other end abutting against the inner wall of the travel hole.

[0010] By adopting the above technical solution, when the locking component is not subjected to external force, the return spring cooperates with the first fixed post, so that the locking component always moves away from the vertical axis, thereby achieving a stable engagement between the locking hole and the annular groove and ensuring the stability of the connection process.

[0011] Optionally, the locking member is provided with limit blocks on both sides, and the sliding groove is provided with limit holes on both sides for the limit blocks to move.

[0012] By adopting the above technical solution, the limiting block can only move within the limiting hole. Affected by the elastic force of the return spring, the limiting block abuts against the inner wall of the limiting hole, thereby preventing the locking part from coming out of the sliding groove and ensuring that the locking part can only slide within the sliding groove, thus guaranteeing the stability of use.

[0013] Optionally, the damping assembly includes a damping seat rotatably connected to the wheel frame and a damping spring disposed above the damping seat. The rotating shaft passes through the damping seat, and the bottom of the wheel frame has a receiving groove for placing the damping spring.

[0014] By adopting the above technical solution, when the load weight changes or the ground is uneven, the shock-absorbing spring can effectively absorb and buffer the impact force from the ground, ensuring the stability and comfort of the casters when they move, and greatly improving the user experience and service life of the casters.

[0015] Optionally, a second fixed post is provided on the top of the shock-absorbing seat, and the shock-absorbing spring is sleeved on the second fixed post.

[0016] By adopting the above technical solution, the two ends of the shock-absorbing spring are respectively restricted by the second fixed column and the inner wall of the receiving groove, thereby ensuring that the shock-absorbing spring is not easy to shake or swing, ensuring that the shock-absorbing spring can intelligently compress or extend, and ensuring the stable operation of the shock-absorbing assembly.

[0017] Optionally, the receiving groove extends upward to the upper side of the locking member, and the shock-absorbing spring passes through the travel hole.

[0018] By adopting the above technical solution, the receiving groove can accommodate a longer spring, giving the spring a larger deformation range, thereby better absorbing and buffering the vibration and impact during the movement of the roller, and improving the shock absorption performance.

[0019] Optionally, the shock-absorbing seat is rotatably connected to a fixed shaft, which is connected to the wheel frame.

[0020] By adopting the above technical solution, the shock absorber can rotate around a fixed axis, thereby adjusting the angle of the shock absorber. When passing over uneven roads, the shock absorber can adjust its angle according to the road conditions, thus ensuring the stability of the caster when moving, thereby extending its service life and improving the user experience.

[0021] Optionally, the shock absorber is provided with an upper clamping arm and a lower clamping arm at the end away from the through hole, and a limiting shaft is provided through the wheel frame, with the limiting shaft located between the upper clamping arm and the lower clamping arm.

[0022] By adopting the above technical solution, the upper and lower clamping arms can contact the side wall of the limiting shaft, thereby limiting the rotation angle of the shock absorber, preventing the shock absorber from rotating too much and affecting the movement of the caster, and ensuring the stability during use.

[0023] Optionally, the sidewalls of the rollers on both sides are covered with a protective shell.

[0024] By adopting the above technical solution, since the sidewall is covered by a protective shell, the roller can be effectively protected from damage caused by external factors such as dust and impurities during operation, reducing wear and extending the service life of the roller.

[0025] Optionally, the protective shell is circumferentially connected with several buckles on the side near the roller, and the roller has a fixing groove for the buckles to engage.

[0026] By adopting the above technical solution, the protective shell can be detachably connected. The buckle and the fixing groove can be fastened together to make the protective shell firmly attached to the roller, effectively preventing the protective shell from falling off or loosening during the rotation of the roller. In addition, the protective shell is easy to remove, which facilitates maintenance and improves the convenience of use.

[0027] In summary, this application has the following beneficial effects:

[0028] 1. By setting a locking element and a ring groove, users can easily remove the casters by simply pushing the locking element, improving ease of use.

[0029] 2. By incorporating shock-absorbing components, the casters can adjust their angle according to the degree of unevenness on the ground during use. The shock-absorbing springs can effectively absorb the impact during movement, thereby improving the service life of the casters and ensuring a smoother movement. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the detachable caster according to an embodiment of this application;

[0031] Figure 2 This is an exploded view of the detachable caster according to an embodiment of this application;

[0032] Figure 3 This is a schematic diagram of the locking component according to an embodiment of this application;

[0033] Figure 4 This is a cross-sectional view of the detachable caster according to an embodiment of this application.

[0034] Explanation of reference numerals in the attached drawings: 1. Wheel frame; 11. Shaft hole; 12. Vertical shaft; 121. Annular groove; 13. Sliding groove; 131. Stop block; 132. Limiting hole; 14. Locking element; 141. Pressing part; 142. Locking hole; 143. Stroke hole; 144. First fixed post; 145. Return spring; 146. Limiting block; 15. Receiving groove; 16. Limiting shaft; 2. Roller; 21. Rotating shaft; 22. Fixed groove; 3. Shock absorption assembly; 31. Shock absorption seat; 311. Second fixed post; 312. Fixed shaft; 313. Upper clamping arm; 314. Lower clamping arm; 32. Shock-absorbing spring; 4. Protective shell; 41. Buckle. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0036] This application discloses a detachable caster. (Refer to...) Figure 1 , Figure 2 The detachable caster includes a wheel frame 1 and rollers 2 on both sides of the wheel frame 1, with a pivot 21 rotatably connected between the two rollers 2. In use, the caster is connected to the mounting base on the bag to move the bag.

[0037] Reference Figure 2 , Figure 3 The top of the wheel frame 1 has a vertically arranged shaft hole 11, and a vertical shaft 12 is arranged inside the shaft hole 11. The vertical shaft 12 is used to rotatably connect with the mounting base on the bag, thereby realizing the universal rotation of the roller 2. A sliding groove 13 is provided on the side of the wheel frame 1 away from the shaft hole 11. A locking member 14 is slidably connected in the sliding groove 13. The end of the locking key away from the shaft hole 11 is a pressing part 141. The locking member 14 has a travel hole 143 for the vertical shaft 12 to move. A locking hole 142 is provided on the end of the travel hole 143 away from the pressing part 141. The locking hole 142 communicates with the travel hole 143. The inner width of the travel hole 143 is greater than or equal to the outer diameter of the vertical shaft 12. The diameter of the locking hole 142 is smaller than the outer diameter of the vertical shaft 12. The vertical shaft 12 has an annular groove 121 around its circumference for the inner wall of the locking hole 142 to be inserted.

[0038] In use, the vertical shaft 12 is rotatably connected to the mounting base on the bag. The locking hole 142 on the locking member 14 engages with the annular groove 121, preventing the vertical shaft 12 from disengaging from the shaft hole 11, thus securing the caster to the vertical shaft 12. To unlock, simply press the pressing part 141, pushing the locking member 14 into the sliding groove 13. At this time, the locking hole 142 disengages from the annular groove 121, allowing the vertical shaft 12 to disengage from the shaft hole 11. The caster can then be removed from the vertical shaft 12 for easy maintenance. In this embodiment, the annular groove 121 is set to one ring. In other embodiments, the number and width of the annular grooves 121 can be increased to ensure the strength of the engagement between the locking hole 142 and the annular groove 121.

[0039] Reference Figure 2 , Figure 3 A stop 131 is provided inside the sliding groove 13, and a first fixing post 144 is provided on the inner wall of the travel hole 143. A return spring 145 is sleeved on the first fixing post 144. One end of the return spring 145 abuts against the stop 131, and the other end abuts against the inner wall of the travel hole 143. When the locking member 14 engages with the vertical shaft 12, the return spring 145 is in a partially compressed state. Due to the presence of the stop 131, the return spring 145 applies a force to the locking member 14 to move outward from the sliding groove 13, so that the inner wall of the locking hole 142 is stably inserted into the annular groove 121, thereby ensuring that the vertical shaft 12 will not come out of the shaft hole 11 and ensuring the stability of use.

[0040] Reference Figure 2 , Figure 3 The locking member 14 is provided with limit blocks 146 on both sides, and the sliding groove 13 is provided with limit holes 132 on both sides for the limit blocks 146 to move. The limit holes 132 are provided through both sides of the sliding groove 13. When the locking member 14 moves in the sliding groove 13, the limit blocks 146 move accordingly in the limit holes 132 and abut against each other, thereby limiting the range of movement of the locking member 14 and preventing the locking member 14 from coming out of the sliding groove 13.

[0041] Reference Figure 2 , Figure 4A shock-absorbing component 3 is installed between the two rollers 2. The shock-absorbing component 3 includes a shock-absorbing seat 31 and a shock-absorbing spring 32 installed above the shock-absorbing seat 31. A rotating shaft 21 passes through the center of the shock-absorbing seat 31. A second fixed post 311 for the shock-absorbing spring 32 to be fitted on the top of the shock-absorbing seat 31 is provided. A receiving groove 15 for the shock-absorbing spring 32 is opened at the bottom of the wheel frame 1. One end of the shock-absorbing spring 32 is in contact with the inner top wall of the receiving groove 15, and the other end is in contact with the top of the shock-absorbing seat 31. A fixed shaft 312 is rotatably installed through the shock-absorbing seat 31 and is installed through the wheel frame 1. When the caster passes over an uneven road surface, the shock-absorbing seat 31 can rotate around the fixed shaft 312, thereby realizing the angle adjustment of the shock-absorbing seat 31 to pass over the road surface more smoothly. At the same time, the shock-absorbing spring 32 on the top of the shock-absorbing seat 31 can play an effective buffering role, thereby realizing the smoothness of the caster movement, improving the user experience and service life, and reducing the number of times the caster needs to be repaired and replaced.

[0042] Reference Figure 2 , Figure 4 The receiving groove 15 extends upward to the upper side of the locking member 14, and the shock-absorbing spring 32 passes through the stroke hole 143. This allows the receiving groove 15 to accommodate a longer shock-absorbing spring 32, giving the shock-absorbing spring 32 a larger deformation range, thereby better absorbing and buffering the vibration and impact during the movement of the roller 2, and effectively improving the shock absorption performance.

[0043] Reference Figure 2 , Figure 4 The shock absorber 31 has an upper clamping arm 313 and a lower clamping arm 314 at the end away from the through hole. The wheel frame 1 has a limiting shaft 16 passing through the end away from the fixed shaft 312, and the limiting shaft 16 is located between the upper clamping arm 313 and the lower clamping arm 314. When the caster wheel travels over a bumpy road, the shock absorber 31 will rotate around the fixed shaft 312. At this time, the limiting shaft 16 will contact the upper clamping arm 313 or the lower clamping arm 314, thereby preventing the shock absorber 31 from rotating too much and affecting the movement of the caster wheel, and ensuring the stability of use.

[0044] Reference Figure 1 , Figure 2 The roller 2 is covered by a protective shell 4. A buckle 41 is provided on the side of the protective shell 4 near the roller 2, and a fixing groove 22 is provided on the side wall of the roller 2 for the buckle 41 to engage. The protective shell 4 effectively prevents damage to the roller 2 from external factors such as dust and impurities during operation, reducing wear and extending the service life of the roller 2. The buckle 41 and fixing groove 22 enable the protective shell 4 to be detachably connected, facilitating maintenance and improving ease of use.

[0045] The implementation principle of a detachable caster in this application embodiment is as follows: When the caster needs to be removed, the locking member 14 is pushed into the sliding groove 13 by the pressing part 141, so that the locking hole 142 is disengaged from the ring groove 121. At this time, the vertical shaft 12 can be disengaged from the shaft hole 11, thereby realizing the removal of the caster. When passing through bumpy roads, the shock-absorbing seat 31 rotates around the fixed shaft 312 and achieves a buffering effect through the shock-absorbing spring 32, extending the service life of the caster, reducing the number of times the caster needs to be removed for replacement or repair, and improving the user experience.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A detachable caster, comprising a wheel frame (1) and a roller (2) rotatably connected to both sides of the wheel frame (1), characterized in that: Rollers (2) between the two sides are provided with a rotating shaft (21), the top of the wheel frame (1) is provided with a vertical shaft hole (11), the inside of the shaft hole (11) is provided with a vertical shaft (12), the wheel frame (1) is provided with a sliding groove (13) away from the vertical shaft (12) side, the sliding groove (13) is slidably connected with a locking piece (14), one end of the locking piece (14) is a pressing part (141), the locking piece (14) is provided with a stroke hole (143) for the movement of the vertical shaft (12), the stroke hole (143) is provided with a locking hole (142) away from the pressing part (141) end, the inner width of the stroke hole (143) is greater than or equal to the outer diameter of the vertical shaft (12), the diameter of the locking hole (142) is less than the outer diameter of the vertical shaft (12), the vertical shaft (12) is circumferentially provided with a ring groove (121) for the locking hole (142) inner wall to insert, the shock absorbing assembly (3) is provided between the two sides of the roller (2).

2. The detachable caster according to claim 1, wherein: The sliding groove (13) is provided with a stop block (131), the inner wall of the stroke hole (143) is provided with a first fixed column (144), the first fixed column (144) is sleeved with a reset spring (145), one end of the reset spring (145) abuts against the stop block (131), and the other end abuts against the inner wall of the stroke hole (143).

3. The detachable caster according to claim 1, wherein: The locking piece (14) is provided with a limiting block (146) on both sides, and the sliding groove (13) is provided with a limiting hole (132) for the movement of the limiting block (146).

4. The detachable caster of claim 1, wherein: The shock absorbing assembly (3) comprises a shock absorbing seat (31) rotatably connected with the wheel frame (1) and a damping spring (32) arranged above the shock absorbing seat (31), and the rotating shaft (21) penetrates the shock absorbing seat (31).

5. The detachable caster according to claim 4, wherein: The shock absorbing seat (31) is provided with a second fixed column (311) on the top, and the damping spring (32) is sleeved on the second fixed column (311).

6. The detachable caster according to claim 4, wherein: The accommodating groove (15) extends upward to the upper side of the locking piece (14), and the damping spring (32) penetrates the stroke hole (143).

7. The detachable caster according to claim 4, wherein: The shock absorbing seat (31) is rotatably provided with a fixed shaft (312), and the fixed shaft (312) penetrates the wheel frame (1).

8. The detachable caster according to claim 4, wherein: The shock absorbing seat (31) is provided with an upper clamping arm (313) and a lower clamping arm (314) away from the fixed shaft (312) end, and the wheel frame (1) is provided with a limiting shaft (16), and the limiting shaft (16) is arranged between the upper clamping arm (313) and the lower clamping arm (314).

9. The detachable caster of claim 1, wherein: The side walls of the two rollers (2) are covered with a protective shell (4).

10. The detachable caster according to claim 9, wherein: The protective shell (4) is circumferentially connected with a plurality of buckles (41) near the roller (2) side, and the roller (2) is provided with a fixed groove (22) for buckling (41).

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