Wheelchair damping device

Abstract

The utility model belongs to the technical field of wheelchairs, and particularly relates to a wheelchair damping device which comprises an installation frame and a wheel carrier used for installing wheels, a damping spring is arranged between the installation frame and the wheel carrier, the installation frame and the wheel carrier are rotatably connected through a first hinge shaft, a supporting wall is arranged on the wheel carrier, an abutting wall is arranged on the installation frame, and the supporting wall is connected with the abutting wall. The two ends of the damping spring abut against the supporting wall and the abutting wall respectively, a connecting rod is arranged on the abutting wall, a movable groove is formed in the supporting wall, and the connecting rod penetrates through the damping spring and penetrates into the movable groove; in the relative rotation process of the mounting frame and the wheel carrier, the damping spring stretches or contracts, the connecting rod swings in the sliding groove, and the wheelchair damping device is good in comfort and convenient to assemble and produce.

Description

Technical Field

[0001] This utility model belongs to the field of wheelchair technology, and specifically relates to a wheelchair shock absorption device. Background Technology

[0002] A wheelchair is a chair equipped with wheels that can help replace walking. It is an important means of mobility for the injured, sick, and disabled to use for home rehabilitation, transportation, medical treatment, and outdoor activities.

[0003] To improve wheelchair comfort, most wheelchairs are equipped with shock-absorbing devices. For example, Chinese utility model patent CN 202223409739.7 discloses a wheelchair shock-absorbing structure, which includes a wheel fork, a shaft fixing seat rotatably connected to the wheel fork fork plate above the wheel fork cross plate, a rotating shaft passing through the rear end of the shaft fixing seat, and a spring located between the rear end of the shaft fixing seat and the cross plate. The structure creates a first plane on the upper surface of the cross plate, a second plane higher than the first plane, and a first inclined plane connecting the first and second planes. The bottom surface of the front end of the shaft fixing seat has a third plane and a second inclined plane. When the shaft fixing seat is raised, the first and third planes are in contact, and there is a gap between the first and second inclined planes. When the shaft fixing seat is lowered, the first and second inclined planes are in contact, and there is a gap between the first and third planes. This structure achieves shock absorption through the changing position of the shaft fixing seat between raising and lowering, while also avoiding friction between the rotating shaft and the spring, extending its service life. This wheelchair shock-absorbing structure has few components, a simple appearance, is safe and reliable, and is easy to assemble and replace.

[0004] In the above structure, the rotation angle between the wheel fork and the axle fixing seat is limited by the first plane, the third plane, the first inclined plane, and the second inclined plane. The spring is set between the wheel fork and the axle fixing seat. During the assembly process, it is necessary to control the wheel fork and the axle fixing seat to compress the spring and make the hinge holes of the wheel fork and the axle fixing seat coaxial. Then, the wheel fork and the axle fixing seat are rotatably connected through the hinge shaft. This process is inconvenient for workers to operate, requires mechanical assistance during production, and is inconvenient for the assembly and production of wheelchairs. In addition, during the use of the wheelchair, debris can easily enter between the first plane and the third plane or between the first inclined plane and the second inclined plane, affecting the relative rotation of the wheel fork and the axle fixing seat and affecting the comfort of the wheelchair. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide a wheelchair shock absorption device that is comfortable and easy to assemble and manufacture.

[0006] The purpose of this utility model is achieved as follows:

[0007] A wheelchair shock absorption device includes a mounting frame and a wheel frame for mounting wheels. A shock-absorbing spring is provided between the mounting frame and the wheel frame. The mounting frame and the wheel frame are rotatably connected by a first hinge shaft. A support wall is provided on the wheel frame, and a clamping wall is provided on the mounting frame. The two ends of the shock-absorbing spring abut against the support wall and the clamping wall, respectively. A connecting rod is provided on the clamping wall, and a movable groove is provided on the support wall. The connecting rod passes through the shock-absorbing spring and enters the movable groove. During the relative rotation of the mounting frame and the wheel frame, the shock-absorbing spring extends or retracts, and the connecting rod swings in the sliding groove.

[0008] The present invention is further configured such that: the connecting rod includes a detachably connected bolt and nut, the head of the bolt and the nut can respectively abut against the support wall and the clamping wall, so that both ends of the shock-absorbing spring abut against the support wall and the clamping wall at the same time.

[0009] The present invention is further configured such that: the two sides of the support wall extend downward to form side plates, the shock-absorbing spring and the abutment wall are both inserted between the two side plates, and the two sides of the first hinge shaft are respectively connected to the side plates, and the middle part of the first hinge shaft is connected to the mounting bracket.

[0010] The present invention is further configured such that: a sliding pad is provided between the mounting bracket and the two side plates, and the sliding pad can support the mounting bracket to prevent the mounting bracket from contacting the side plates.

[0011] The present invention is further configured such that: the mounting frame and the wheel frame are hinged to each other in an X shape via a first hinge shaft; the support wall and the abutment wall are located on the same side in the horizontal direction of the first hinge shaft; the lower end of the side plate is inclined downward toward the other side of the first hinge shaft; the lower part of the side plate is provided with a hinge hole for mounting the wheel; the mounting frame extends upward toward the side plate to form a mounting part; the mounting part extends laterally and can support the wheelchair.

[0012] The present invention is further configured such that: a rotating shaft is detachably provided on the mounting part, the rotating shaft is vertically arranged, the mounting bracket can rotate horizontally around the rotating shaft, and a support protrusion that abuts against the mounting part is provided on the circumference of the rotating shaft.

[0013] The present invention is further configured such that: the first hinge shaft includes a rod body, and mounting holes for mounting the rod body are provided on both side plates. Both ends of the rod body are respectively inserted into the mounting holes. At least one end of the rod body is threadedly connected to an end cap, which abuts against the end of the rod body and prevents the rod body from detaching from the mounting hole.

[0014] The advantages of this utility model compared to the prior art are:

[0015] 1. In this utility model, the mounting frame and wheel frame are rotatably connected by the first hinge shaft. During the shock absorption process, the connecting rod swings in the movable groove. This not only prevents the connecting rod from disengaging from the movable groove and limits the rotation angle of the mounting frame and wheel frame, but also facilitates worker operation and production. Furthermore, the structure makes it less likely for debris to affect the relative rotation of the mounting frame and wheel frame, which is beneficial to improving the shock absorption effect of the wheelchair shock absorption device and enhancing the comfort of the wheelchair.

[0016] 2. In this utility model, the connecting rod includes detachable bolts and nuts, which facilitates the disassembly and installation of the connecting rod and prevents accidental detachment of the connecting rod from the movable groove during use. This is beneficial for the stable installation of the wheelchair shock absorption device. In addition, this structure can prevent the shock absorption spring from detaching from the support wall and the abutment wall during use, reducing noise during use and ensuring that the shock absorption spring can always play a shock absorption role. After long-term use, the user can adjust the nuts to make the shock absorption spring press against the support wall and the abutment wall at the same time, which helps to extend the service life of the wheelchair shock absorption device.

[0017] 3. In this utility model, since the shock-absorbing spring and the abutment wall are both inserted between the two side plates, it is beneficial to reduce the impact of debris on the shock-absorbing spring during use and improve the comfort of the wheelchair. The sliding pads prevent the mounting bracket from contacting the side plates, which helps to reduce the friction between the mounting bracket and the wheel frame during shock absorption, improve the shock absorption effect of the wheelchair shock absorption device, and extend the service life of the wheelchair shock absorption device.

[0018] 4. The hinged X-shaped mounting bracket and wheel frame in this utility model help reduce the height and volume of the wheelchair shock absorber during use. Furthermore, because the lower end of the side plate slopes downwards towards the other side of the first hinge shaft, and the hinge hole is located in the lower part of the side plate, this structure facilitates the rotation of the wheelchair shock absorber during use, making it convenient for wheelchair use. The laterally extending mounting portion facilitates the support of the wheelchair shock absorber for the wheelchair. The detachable rotating shaft facilitates the installation of the wheelchair shock absorber on different wheelchairs, and the supporting protrusion helps to disperse the relative force between the rotating shaft and the mounting portion, preventing excessive stress and damage at the connection point between the rotating shaft and the mounting portion.

[0019] 5. In this utility model, since the end cap is pressed against the end of the rod body during installation and prevents the rod body from detaching from the mounting hole, this structure avoids the deformation of the side plate driven by the end cap during installation, and can avoid the occurrence of large friction during the rotation of the mounting frame and wheel frame, which is beneficial to reduce noise and improve the shock absorption effect of the wheelchair shock absorption device. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is an exploded view of the present invention;

[0022] Figure 3 This is one of the cross-sectional views of the present invention after the wheels have been removed;

[0023] Figure 4 This is the second sectional view of the present invention after the wheels have been removed;

[0024] Figure 5 This is a schematic diagram of the wheel frame structure in this utility model;

[0025] Figure 6 This is a schematic diagram of the mounting bracket in this utility model.

[0026] The labels in the diagram have the following meanings: 1-wheel frame; 11-support wall; 12-side plate; 13-moving groove; 14-rotation hole; 15-mounting hole; 2-mounting bracket; 21-clamping wall; 22-mounting part; 211-first fixing hole;

[0027] 221-Second fixing hole; 3-Shock-absorbing spring; 4-Connecting rod; 41-Bolt; 42-Nut; 5-First hinge shaft; 51-Rod body; 52-End cap; 53-Sliding washer; 6-Wheel; 61-Wheel axle; 7-Rotating shaft;

[0028] 71 - Support flange. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0030] See Figures 1 to 6As shown, a wheelchair shock absorption device includes a mounting frame 2 and a wheel frame 1 for mounting wheels 6. A shock-absorbing spring 3 is provided between the mounting frame 2 and the wheel frame 1. The mounting frame 2 and the wheel frame 1 are rotatably connected by a first hinge shaft 5. A support wall 11 is provided on the wheel frame 1, and a clamping wall 21 is provided on the mounting frame 2. The two ends of the shock-absorbing spring 3 abut against the support wall 11 and the clamping wall 21, respectively. A connecting rod 4 is provided on the clamping wall 21. A movable groove 13 is provided on the support wall 11. The connecting rod 4 passes through the shock-absorbing spring 3 and enters the movable groove 13. During the relative rotation of the mounting frame 2 and the wheel frame 1, the shock-absorbing spring 3 extends or retracts. 4. The wheelchair swings in the sliding groove. In this structure, the mounting frame 2 and the wheel frame 1 are rotatably connected by the first hinge shaft 5. During the shock absorption process, the connecting rod 4 swings in the movable groove 13. This not only prevents the connecting rod 4 from disengaging from the movable groove 13 and limits the rotation angle of the mounting frame 2 and the wheel frame 1, but also allows the mounting frame 2 and the wheel frame 1 to be rotatably connected first during assembly, followed by the installation of the shock-absorbing spring 3, and finally the control connecting rod 4 to pass into the movable groove 13. This process is convenient for workers to operate and facilitates production and processing. In addition, debris in this structure is less likely to affect the relative rotation of the mounting frame 2 and the wheel frame 1, which is beneficial to improving the shock absorption effect of the wheelchair shock absorption device and improving the comfort of the wheelchair.

[0031] The connecting rod 4 described in this utility model includes a detachably connected bolt 41 and nut 42. The head of the bolt 41 and the nut 42 can respectively abut against the support wall 11 and the clamping wall 21, so that both ends of the shock-absorbing spring 3 are simultaneously pressed against the support wall 11 and the clamping wall 21. This structure facilitates the disassembly and installation of the connecting rod 4, avoids the connecting rod 4 from accidentally disengaging from the movable groove 13 during use, and is conducive to the stable installation of the wheelchair shock-absorbing device. In addition, this structure can prevent the shock-absorbing spring 3 from disengaging from the support wall 11 and the clamping wall 21 during use, reduce noise during use, and ensure that the shock-absorbing spring 3 can always play a shock-absorbing role. After long-term use, the user can adjust the nut 42 to make the shock-absorbing spring 3 simultaneously press against the support wall 11 and the clamping wall 21, which helps to extend the service life of the wheelchair shock-absorbing device. In this embodiment, the clamping wall 21 is provided with a first fixing hole 211. The bolt 41 passes through the movable groove 13, the shock-absorbing spring 3 and the first fixing hole 211 in sequence and is detachably connected to the nut 42.

[0032] The support wall 11 extends downward on both sides to form side plates 12. The shock-absorbing spring 3 and the abutment wall 21 are both inserted between the two side plates 12. The first hinge shaft 5 is connected to the side plates 12 on both sides and connected to the mounting frame 2 in the middle. Since the shock-absorbing spring 3 and the abutment wall 21 are both inserted between the two side plates 12, it is beneficial to reduce the impact of debris on the shock-absorbing spring 3 during use and improve the comfort of the wheelchair.

[0033] Preferably, a sliding pad 53 is provided between the mounting frame 2 and the two side plates 12. The sliding pad 53 can support the mounting frame 2 and prevent the mounting frame 2 from contacting the side plates 12. The setting of the sliding pad 53 to prevent the mounting frame 2 from contacting the side plates 12 helps to reduce the friction between the mounting frame 2 and the wheel frame 1 during shock absorption, improve the shock absorption effect of the wheelchair shock absorption device, and extend the service life of the wheelchair shock absorption device.

[0034] The mounting frame 2 and wheel frame 1 are hinged in an X-shape via a first hinge shaft 5. The support wall 11 and the abutment wall 21 are located on the same side in the horizontal direction of the first hinge shaft 5. The lower end of the side plate 12 is inclined downwards towards the other side of the first hinge shaft 5. The lower part of the side plate 12 is provided with a hinge hole for mounting the wheel 6. The mounting frame 2 extends upwards towards the side plate 12 to form a mounting part 22. The mounting part 22 extends laterally and can support the wheelchair. Compared with the mounting frame 2 and wheel frame 1 which are arranged in a V-shape, the X-shaped hinged mounting frame 2 and wheel frame are more suitable for wheelchairs. 1. This design helps to reduce the height and volume of the wheelchair shock absorber during use. Furthermore, since the lower end of the side plate 12 is inclined downwards to the other side of the first hinge shaft 5, and the hinge hole is located in the lower part of the side plate 12, this structure facilitates the rotation of the wheelchair shock absorber during use, making it convenient for wheelchair use. The laterally extending mounting part 22 facilitates the support of the wheelchair shock absorber for the wheelchair. In this embodiment, the wheel 6 is provided with a wheel axle 61, which passes through the hinge holes on the two side plates 12 respectively.

[0035] In this invention, the mounting part 22 is detachably equipped with a rotating shaft 7, which is vertically oriented. The mounting bracket 2 can rotate horizontally around the rotating shaft 7. A supporting flange 71 is provided around the rotating shaft 7 to abut against the mounting part 22. The detachable rotating shaft 7 facilitates the installation of the wheelchair shock absorber on different wheelchairs. The supporting flange 71 helps to disperse the relative force between the rotating shaft 7 and the mounting part 22, preventing excessive stress and damage at the connection point. In this embodiment, the mounting part 22 is provided with a second fixing hole 221. The rotating shaft 7 is inserted into the second fixing hole 221 and fixed relative to the mounting part 22 by fasteners. The detachable rotating shaft 7 facilitates the installation of the wheelchair shock absorber on different wheelchairs, and the supporting flange 71 helps to disperse the relative force between the rotating shaft 7 and the mounting part 22, preventing excessive stress and damage at the connection point.

[0036] The first hinge shaft 5 includes a rod 51. Both side plates 12 are provided with mounting holes 15 for mounting the rod 51. Both ends of the rod 51 are respectively inserted into the mounting holes 15. At least one end of the rod 51 is threadedly connected to an end cap 52. The end cap 52 abuts against the end of the rod 51 and prevents the rod 51 from disengaging from the mounting hole 15. Since the end cap 52 abuts against the end of the rod 51 during installation and prevents the rod 51 from disengaging from the mounting hole 15, this structure avoids the end cap 52 driving the side plate 12 to deform during installation, and can avoid the occurrence of large friction during the rotation of the mounting frame 2 and wheel frame 1, which is beneficial to reduce noise and improve the shock absorption effect of the wheelchair shock absorption device.

[0037] In this embodiment, both side plates 12 are provided with rotating holes 14. The two sides of the rod 51 are respectively inserted into the rotating holes 14 on the two side plates 12, and both ends of the rod 51 are threadedly connected with end caps 52, which are respectively pressed against the ends of the rod 51.

[0038] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A wheelchair shock absorption device, comprising a mounting frame (2) and a wheel frame (1) for mounting wheels (6), wherein a shock-absorbing spring (3) is provided between the mounting frame (2) and the wheel frame (1), characterized in that: The mounting frame (2) and the wheel frame (1) are rotatably connected by the first hinge shaft (5). The wheel frame (1) is provided with a support wall (11), and the mounting frame (2) is provided with a pressing wall (21). The two ends of the shock-absorbing spring (3) abut against the support wall (11) and the pressing wall (21) respectively. A connecting rod (4) is provided on the pressing wall (21), and a movable groove (13) is provided on the support wall (11). The connecting rod (4) passes through the shock-absorbing spring (3) and enters the movable groove (13). During the relative rotation of the mounting frame (2) and the wheel frame (1), the shock-absorbing spring (3) extends or contracts, and the connecting rod (4) swings in the sliding groove.

2. The wheelchair shock absorption device according to claim 1, characterized in that: The connecting rod (4) includes a detachably connected bolt (41) and nut (42). The head of the bolt (41) and the nut (42) can abut against the support wall (11) and the clamping wall (21) respectively, so that the two ends of the shock-absorbing spring (3) abut against the support wall (11) and the clamping wall (21) at the same time.

3. The wheelchair shock absorption device according to claim 1, characterized in that: The support wall (11) extends downward on both sides to form side plates (12). The shock-absorbing spring (3) and the abutting wall (21) are both inserted between the two side plates (12). The first hinge shaft (5) is connected to the side plates (12) on both sides and the middle part of the first hinge shaft (5) is connected to the mounting bracket (2).

4. A wheelchair shock absorption device according to claim 3, characterized in that: Sliding pads (53) are provided between the mounting bracket (2) and the two side plates (12). The sliding pads (53) can support the mounting bracket (2) to prevent the mounting bracket (2) from contacting the side plates (12).

5. A wheelchair shock absorption device according to claim 3, characterized in that: The mounting frame (2) and the wheel frame (1) are hinged in an X shape by the first hinge shaft (5). The support wall (11) and the abutment wall (21) are located on the same side in the horizontal direction of the first hinge shaft (5). The lower end of the side plate (12) is inclined downward to the other side of the first hinge shaft (5). The lower part of the side plate (12) is provided with a hinge hole for mounting the wheel (6). The mounting frame (2) extends upward to the side plate (12) to form a mounting part (22). The mounting part (22) extends laterally and can support the wheelchair.

6. A wheelchair shock absorption device according to claim 5, characterized in that: The mounting part (22) is detachably provided with a rotating shaft (7). The rotating shaft (7) is vertically arranged, and the mounting bracket (2) can rotate horizontally around the rotating shaft (7). A support protrusion (71) that abuts against the mounting part (22) is provided around the rotating shaft (7).

7. A wheelchair shock absorption device according to claim 3, characterized in that: The first hinge shaft (5) includes a rod (51), and two side plates (12) are provided with mounting holes (15) for mounting the rod (51). Both ends of the rod (51) are respectively inserted into the mounting holes (15). At least one end of the rod (51) is threaded with an end cap (52). The end cap (52) abuts against the end of the rod (51) and prevents the rod (51) from disengaging from the mounting hole (15).

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