Shock absorption wheelchair with adjustable pedals

Abstract

The utility model relates to the technical field of medical instruments, and discloses a damping wheelchair with adjustable pedals, which comprises a frame and two pedal components, the two pedal components are respectively mounted on two sides of the front end of the frame, and the frame comprises two front wheel arms, two rear wheel arms and two wheel arm joints. One front wheel arm, one rear wheel arm and one wheel arm joint form a group, the front wheel arm and the rear wheel arm in each group are rotationally connected through the wheel arm joint, a front wheel arm reinforcing frame is welded between the two front wheel arms, a transmission rod front end joint is fixed on the inner side of the front wheel arm reinforcing frame, and a transmission rod is rotationally connected to the transmission rod front end joint. The height of the pedal can be adjusted by pulling the telescopic rod upwards or downwards, the distance between the pedal and the bicycle frame can be adjusted by pulling the telescopic square pipe towards one side, users of different heights can use the bicycle conveniently, pressure is buffered through matched use of the hydraulic rod and the reset spring in the shock absorber, and the shock absorption effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a shock-absorbing wheelchair with adjustable pedals. Background Art

[0002] A wheelchair is a chair with wheels that can help replace walking. It is mainly used as an important means of mobility for the injured, sick, and disabled to recover at home, for turnover transportation, for medical treatment, and for outdoor activities. There are many types of wheelchairs, including ordinary wheelchairs, special wheelchairs, high-back reclining wheelchairs, electric wheelchairs, toilet chairs, sports wheelchairs, and standing-assist wheelchairs.

[0003] Prior art publication number CN213525975U provides a wheelchair with adjustable footrest height, comprising a wheelchair frame, a seat and a backrest arranged on the wheelchair frame, and rear support wheels and front steering wheels respectively arranged on both sides of the wheelchair frame, a front footrest is arranged at the front of the wheelchair frame, characterized in that the front footrest is hinged to the wheelchair frame through a connecting rod, and the connecting rod is set as a telescopic rod, and an adjustment rod is provided between the connecting rod and the wheelchair frame.

[0004] The above device can only adjust the footrest in the vertical direction, and the footrest height is adjustable, but the distance between the footrest and the wheelchair body is not adjustable, which makes it difficult to adapt to users with different heights and leg lengths. At the same time, the above device lacks a shock-absorbing and shock-absorbing structure, so the wheelchair is prone to bumps when in use, and the user experience is not good. Utility Model Content

[0005] The utility model aims to provide a shock-absorbing wheelchair with adjustable footrests to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A shock-absorbing wheelchair with adjustable pedals, comprising a frame and a pedal assembly, wherein two pedal assemblies are provided and are respectively mounted on both sides of the front end of the frame, the frame comprises two front wheel arms, two rear wheel arms and two wheel arm joints, one front wheel arm, one rear wheel arm and one wheel arm joint form a group, each group of the front wheel arms and the rear wheel arms are rotatably connected via the wheel arm joints, a front wheel arm reinforcement frame is welded between the two front wheel arms, a transmission rod front end joint is fixed to the inner side of the front wheel arm reinforcement frame, and a transmission rod is rotatably connected to the transmission rod front end joint;

[0008] A rear wheel arm connecting shaft is rotatably connected between the two rear wheel arms, a support rod is elastically connected above the rear wheel arm connecting shaft through a plurality of shock absorbers, a connecting angle plate is welded to one end of the support rod corresponding to the transmission rod, and the connecting angle plate is rotatably connected to one end of the transmission rod on the corresponding side through a rotating shaft;

[0009] The pedal assembly includes a telescopic rod, a hollow circular tube and a pedal, the telescopic rod is slidably inserted in the hollow circular tube, and the two are limited and fixed by a height adjustment knob, the pedal is rotatably connected to the bottom end of the telescopic rod, and the hollow circular tube is movably connected to the front end of the frame.

[0010] As a further solution of the utility model: it also includes wheels, a backrest, armrests and a cushion, the wheels are installed at the bottom of the frame, the cushion is fixed to the top of the frame through a cushion bracket, the backrest is installed on one side of the frame corresponding to the cushion, and the armrests are provided in two and are respectively installed on both sides above the cushion.

[0011] As a further solution of the utility model: the seat cushion bracket includes two hollow square tubes arranged opposite to each other, the two hollow square tubes are connected and fixed by a reinforcing shaft, the two hollow square tubes are respectively arranged on both sides above the frame, and an armrest connecting shaft is fixed to the outer side of one end of the two hollow square tubes, and the bracket at the bottom of the armrest is rotatably connected to the armrest connecting shaft;

[0012] A T-shaped bracket is fixed on one side of the top of the hollow round tube, and a telescopic square tube is fixed on the side of the T-shaped bracket corresponding to the hollow square tube. The telescopic square tube is slidably inserted into the hollow square tube on the corresponding side, and the two are limited and fixed by a length adjustment knob;

[0013] A frame connecting plate is welded to one side of the bottom of the hollow square tube corresponding to the wheel arm joint, and the frame connecting plate is fixedly connected to the wheel arm joint on the corresponding side through studs.

[0014] As a further solution of the utility model: the wheels include a front wheel and a rear wheel, the diameter of the front wheel is smaller than the diameter of the rear wheel; the bottoms of the two front wheel arms are rotatably connected to the front wheel hub frame, the bottom of the front wheel hub frame is rotatably connected to the front wheel, the bottom ends of the two rear wheel arms are fixed to the rear wheel hub frame, and the rear wheels are rotatably connected to the two rear wheel hub frames.

[0015] As a further solution of the utility model: the backrest includes a cushion and a cushion frame, the cushion is fixed on the cushion frame, the cushion frame is arranged above the support rod, and the two are fixedly connected by a bracket, and a corner plate reinforcement head is arranged on one side of the cushion frame corresponding to the connecting corner plate, and the corner plate reinforcement head is rotatably connected to the connecting corner plate on the corresponding side through a rotating shaft;

[0016] An armrest mounting hole is provided on a side of the cushion frame corresponding to the armrest, and one end of the armrest is rotatably connected to the armrest mounting hole on the corresponding side. A seat cushion bracket mounting hole is provided on a side of the cushion frame corresponding to the hollow square tube, and an L-shaped connecting portion is provided at one end of the hollow square tube, and the L-shaped connecting portion is rotatably connected to the seat cushion bracket mounting hole via a rotating shaft.

[0017] As a further solution of the utility model: the shock absorber includes two relatively arranged bases, the two bases are respectively fixed on the rear wheel arm connecting shaft and the support rod, and the two bases are rotatably connected with connecting blocks, a hydraulic rod is fixed between the two connecting blocks, and a return spring is provided on the outside of the hydraulic rod, and the two ends of the return spring are respectively fixedly connected to the connecting block on the corresponding side.

[0018] As a further solution of the utility model: a pedal pad joint is fixed to the bottom of the front wheel arm reinforcement frame, and a pedal pad is rotatably connected to one side below the front wheel arm reinforcement frame through the pedal pad joint, and the pedal pad is fitted above the footrest.

[0019] As a further solution of the utility model: rear wheel arm mounting shaft holes are opened on the inner walls of the two rear wheel arms corresponding to the side of the rear wheel arm connecting shaft, and the two ends of the rear wheel arm connecting shaft are respectively rotatably connected to the rear wheel arm mounting shaft holes on the corresponding side, and a rear wheel arm reinforcement frame is welded between the two rear wheel arms, and the rear wheel arm reinforcement frame is arranged on a side close to the two rear wheel hub frames.

[0020] As a further solution of the utility model: a reinforcement buckle is clamped between the cushion frame and the support rod.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. In the utility model, the telescopic rod is slidably connected to the hollow round tube. The height of the footrest can be adjusted by pulling the telescopic rod upward or downward. After adjustment, the height adjustment knob is tightened to limit the telescopic rod and the hollow round tube. Further, the telescopic square tube is slidably connected to the hollow square tube. The distance between the footrest and the frame can be adjusted by pulling the telescopic square tube to one side. After adjustment, the length adjustment knob is tightened to limit the telescopic square tube and the hollow square tube. The height of the footrest and the distance between the footrest and the frame in the device are adjustable, which can be convenient for users of different heights to use;

[0023] 2. In the utility model, the front wheel arm is rotatably connected with the rear wheel arm. When the front wheel encounters an obstacle, the front wheel arm bends inward, driving the transmission rod to move backward. During the backward movement of the transmission rod, the support rod can be pushed to make the support rod move backward synchronously. The backward movement of the support rod will pull the shock absorber, causing the shock absorber to stretch obliquely upward. The hydraulic rod and the return spring in the shock absorber are used together to buffer the pressure, thereby achieving the effect of shock absorption and shock absorption. The device can be provided with multiple shock absorbers to achieve a better shock absorption effect. After the front wheel passes the obstacle, the transmission rod returns to its original position under the action of the return spring, and the wheel remains normal again.

[0024] 3. In the utility model, the backrest is rotatably connected to the armrest and the seat cushion bracket, and the backrest can be bent downward and folded on the seat cushion. The armrest is also rotatably connected to the seat cushion bracket and can also be folded. The folded armrest is flush with the backrest, the front wheel arm is rotatably connected to the rear wheel arm, and the front wheel arm can be folded backward, so that the front wheel can be stored inside the frame. The footrest assembly is slidably connected to the frame, and the footrest assembly can be removed from the frame by pulling the telescopic square tube out of the hollow square tube. The wheelchair and the footrest are separately arranged, the wheelchair can be folded, and the footrest can be removed, which is convenient for transportation and daily storage. After purchasing this product, users do not need complicated installation, and only need to open the folded wheelchair and install the footrest to use it. The product design is more friendly and the user experience is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0026] Figure 2 This is a schematic diagram of the structure of the utility model after the seat cushion is removed.

[0027] Figure 3 It is a structural schematic diagram of the footrest assembly in the utility model.

[0028] Figure 4 It is a schematic diagram of the connection structure between the frame and the backrest in the utility model.

[0029] Figure 5 This is a first perspective view of the frame and backrest of the utility model after unfolding.

[0030] Figure 6 This is a second viewing angle diagram of the present invention after the frame and the backrest are unfolded.

[0031] Figure 7 for Figure 6 Enlarged view of point A in the middle.

[0032] Reference numerals:

[0033] 1-frame, 11-front wheel arm, 12-rear wheel arm, 13-wheel arm joint, 14-front wheel arm reinforcement frame, 15-front wheel hub frame, 16-foot pad joint, 17-transmission rod, 18-rear wheel arm connecting shaft, 19-transmission rod front end joint, 110-support rod;

[0034] 111- shock absorber, 1111- base, 1112- connection block, 1113- hydraulic rod, 1114- return spring;

[0035] 112-connecting angle plate, 113-rear wheel arm mounting shaft hole, 114-rear wheel arm reinforcement frame, 115-rear wheel hub frame, 116-reinforcement buckle;

[0036] 2-wheel, 21-front wheel, 22-rear wheel;

[0037] 3-backrest, 31-cushion, 32-cushion frame, 33-armrest mounting hole, 34-seat bracket mounting hole, 35-angle plate reinforcement head;

[0038] 4-armrest, 5-seat cushion;

[0039] 6-pedal assembly, 61-telescopic rod, 62-height adjustment knob, 63-hollow round tube, 64-T-shaped bracket, 65-telescopic square tube, 66-pedal;

[0040] 7-seat support, 71-hollow square tube, 72-L-shaped connection part, 73-armrest connection shaft, 74-frame connection plate, 75-reinforcement shaft, 76-length adjustment knob;

[0041] 8-Foot pad. DETAILED DESCRIPTION

[0042] The following embodiments will be combined with the accompanying drawings to describe the utility model in detail. In the drawings or descriptions, similar or identical parts use the same reference numerals, and in actual applications, the shape, thickness or height of each component can be enlarged or reduced. The various embodiments listed in the utility model are only used to illustrate the utility model, and are not used to limit the scope of the utility model. Any obvious modifications or changes made to the utility model do not depart from the spirit and scope of the utility model.

[0043] Example 1

[0044] See also Figure 1 , Figure 2In an embodiment of the utility model, a shock-absorbing wheelchair with adjustable pedals includes a frame 1, wheels 2, a backrest 3, armrests 4, a seat cushion 5 and a pedal assembly 6, the wheel 2 is installed at the bottom of the frame 1, the seat cushion 5 is fixed to the top of the frame 1 through a seat cushion bracket 7, the backrest 3 is installed on one side of the frame 1 corresponding to the seat cushion 5, the armrest 4 is provided in two numbers and is respectively installed on both sides above the seat cushion 5, the pedal assembly 6 is provided in two numbers and is respectively installed on both sides of the front end of the frame 1, the wheel 2 includes a front wheel 21 and a rear wheel 22, and the diameter of the front wheel 21 is smaller than the diameter of the rear wheel 22.

[0045] See also Figure 3 The foot pedal assembly 6 includes a telescopic rod 61, a hollow circular tube 63 and a foot pedal 66. The telescopic rod 61 is slidably inserted in the hollow circular tube 63, and the two are limited and fixed by a height adjustment knob 62. The foot pedal 66 is rotatably connected to the bottom end of the telescopic rod 61, and the foot pedal 66 can be rotatably folded on the telescopic rod 61. A T-shaped bracket 64 is fixed to one side of the top of the hollow circular tube 63, and a telescopic square tube 65 is fixed to one side of the T-shaped bracket 64.

[0046] Please continue reading Figure 3 The seat cushion bracket 7 includes two hollow square tubes 71 arranged opposite to each other, and the two hollow square tubes 71 are connected and fixed by a reinforcement shaft 75. One end of the two hollow square tubes 71 is provided with an L-shaped connecting portion 72, and the outer side of one end of the two hollow square tubes 71 is fixed with an armrest connecting shaft 73. The bracket at the bottom of the armrest 4 is rotatably connected to the armrest connecting shaft 73, and the inner side of the other end of the two hollow square tubes 71 is fixed with a frame connecting plate 74. The telescopic square tube 65 is slidably inserted in the hollow square tube 71, and the two are limited and fixed by a length adjustment knob 76.

[0047] Example 2

[0048] Based on Example 1, please refer to Figure 4 , Figure 5 , Figure 6 The frame 1 includes two front wheel arms 11, two rear wheel arms 12 and two wheel arm joints 13, the front wheel arms 11 and the rear wheel arms 12 are rotatably connected through the wheel arm joints 13, the frame connecting plate 74 is fixedly connected to the wheel arm joints 13 on the corresponding side through studs, a front wheel arm reinforcement frame 14 is welded between the two front wheel arms 11, the bottoms of the two front wheel arms 11 are rotatably connected to the front wheel hub frames 15, the lower part of the front wheel hub frames 15 is rotatably connected to the front wheel 21, a footrest pad joint 16 is fixed to the bottom of the front wheel arm reinforcement frame 14, a footrest pad 8 is rotatably connected to one side of the lower part of the front wheel arm reinforcement frame 14 through the footrest pad joint 16, the footrest pad 8 is fitted above the footrest 66, a transmission rod front end joint 19 is fixed to the inner side of the front wheel arm reinforcement frame 14, a transmission rod 17 is rotatably connected to the transmission rod front end joint 19, and in this embodiment, two transmission rods 17 are provided, which are respectively placed on both sides of the interior of the frame 1;

[0049] A rear wheel arm connecting shaft 18 is rotatably connected between the two rear wheel arms 12. A support rod 110 is elastically connected above the rear wheel arm connecting shaft 18 through a plurality of shock absorbers 111. In this embodiment, two shock absorbers 111 are provided, which are respectively located on both sides above the rear wheel arm connecting shaft 18. A connecting angle plate 112 is welded to one end of the support rod 110 corresponding to the transmission rod 17. The connecting angle plate 112 is rotatably connected to one end of the transmission rod 17 on the corresponding side. The two rear wheel arms 12 correspond to the rear A rear wheel arm mounting shaft hole 113 is provided on the inner wall of one side of the wheel arm connecting shaft 18, and both ends of the rear wheel arm connecting shaft 18 are rotatably connected to the rear wheel arm mounting shaft hole 113 on the corresponding side, and a rear wheel hub frame 115 is fixed to the bottom end of each of the two rear wheel arms 12, and the two rear wheel hub frames 115 are rotatably connected to the rear wheels 22, and a rear wheel arm reinforcement frame 114 is welded between the two rear wheel arms 12, and the rear wheel arm reinforcement frame 114 is arranged on one side close to the two rear wheel hub frames 115;

[0050] The backrest 3 includes a cushion 31 and a cushion frame 32. The cushion 31 is fixed on the cushion frame 32. An armrest mounting hole 33 is provided on the side of the cushion frame 32 corresponding to the armrest 4. One end of the armrest 4 is rotatably connected to the armrest mounting hole 33. A seat cushion bracket mounting hole 34 is provided on the side of the cushion frame 32 corresponding to the hollow square tube 71. The hollow square tube 71 and the seat cushion bracket mounting hole 34 are rotatably connected via an L-shaped connecting portion 72. A corner plate reinforcement head 35 is provided on the side of the cushion frame 32 corresponding to the connecting corner plate 112. The corner plate reinforcement head 35 is rotatably connected to the connecting corner plate 112 on the corresponding side via a rotating shaft. The cushion frame 32 is arranged above the support rod 110, and the two are fixedly connected via a bracket. A reinforcement buckle 116 is clamped between the cushion frame 32 and the support rod 110, and the cushion frame 32 and the support rod 110 are reinforced by the reinforcement buckle 116.

[0051] See also Figure 7 The shock absorber 111 includes two relatively arranged bases 1111, and the two bases 1111 are respectively fixed on the rear wheel arm connecting shaft 18 and the support rod 110, and the two bases 1111 are rotatably connected with a connecting block 1112, and a hydraulic rod 1113 is fixed between the two connecting blocks 1112. The outer sleeve of the hydraulic rod 1113 is provided with a return spring 1114, and the two ends of the return spring 1114 are respectively fixedly connected to the connecting block 1112 on the corresponding side.

[0052] Working principle:

[0053] 1. Pedal adjustment: The telescopic rod 61 is slidably connected to the hollow round tube 63. The height of the footrest 66 can be adjusted by pulling the telescopic rod 61 upward or downward. After adjustment, tighten the height adjustment knob 62 to limit the telescopic rod and the hollow round tube; the telescopic square tube 65 is slidably connected to the hollow square tube 71. The distance between the footrest 66 and the frame 1 can be adjusted by pulling the telescopic square tube 65 to one side. After adjustment, tighten the length adjustment knob 76 to limit the telescopic square tube and the hollow square tube; the height of the footrest and the distance between the footrest and the frame are both adjustable, which can be convenient for users of different heights to use;

[0054] 2. Shock absorption and shock absorption: The front wheel arm 11 is rotatably connected with the rear wheel arm 12. When the front wheel 21 encounters an obstacle, the front wheel arm 11 bends inward, driving the transmission rod 17 to move backward. During the backward movement of the transmission rod 17, the support rod 110 can be pushed, so that the support rod 110 moves backward synchronously. The backward movement of the support rod 110 will pull the shock absorber 111, so that the shock absorber 111 stretches obliquely upward. The hydraulic rod 1113 and the return spring 1114 in the shock absorber 111 cooperate to use the buffer pressure to achieve the effect of shock absorption and shock absorption. The device can be provided with multiple shock absorbers to achieve a better shock absorption effect. After the front wheel 11 passes the obstacle, the transmission rod 17 returns to its original position under the action of the return spring 1114, and the wheel remains normal again;

[0055] 3. Foldable: In this device, the backrest 3 is rotatably connected to the armrest 4 and the seat cushion bracket 7. The backrest 3 can be bent downward and folded on the seat cushion 5. The armrest 4 is also rotatably connected to the seat cushion bracket 7 and can also be folded. The folded armrest is flush with the backrest. The front wheel arm 11 is rotatably connected to the rear wheel arm 12, and the front wheel arm 11 can be folded backward, so that the front wheel 21 can be stored inside the frame 1. The footrest assembly 6 is slidably connected to the frame 1. The telescopic square tube 65 can be pulled out of the hollow square tube 71, and the footrest assembly 6 can be removed from the frame 1. The wheelchair and the footrest are separately arranged, the wheelchair can be folded, and the footrest can be removed, which is convenient for transportation and daily storage. After purchasing this product, the user does not need complicated installation. He only needs to open the folded wheelchair and install the footrest to use it. The product design is more friendly and the user experience is better.

[0056] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0057] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A shock-absorbing wheelchair with adjustable pedals, comprising a frame (1) and a pedal assembly (6), wherein the pedal assembly (6) is provided in two pieces and is respectively mounted on both sides of the front end of the frame (1), characterized in that: The frame (1) comprises two front wheel arms (11), two rear wheel arms (12) and two wheel arm joints (13); one front wheel arm (11), one rear wheel arm (12) and one wheel arm joint (13) form a group; each group of the front wheel arms (11) and the rear wheel arms (12) are rotatably connected via the wheel arm joints (13); a front wheel arm reinforcement frame (14) is welded between the two front wheel arms (11); a transmission rod front end joint (19) is fixed to the inner side of the front wheel arm reinforcement frame (14); and a transmission rod (17) is rotatably connected to the transmission rod front end joint (19); A rear wheel arm connecting shaft (18) is rotatably connected between the two rear wheel arms (12); a support rod (110) is elastically connected above the rear wheel arm connecting shaft (18) via a plurality of shock absorbers (111); a connecting angle plate (112) is welded to one end of the support rod (110) corresponding to the transmission rod (17); and the connecting angle plate (112) is rotatably connected to one end of the transmission rod (17) on the corresponding side via a rotating shaft; The pedal assembly (6) comprises a telescopic rod (61), a hollow circular tube (63) and a pedal (66); the telescopic rod (61) is slidably inserted into the hollow circular tube (63), and the two are fixed by a height adjustment knob (62); the pedal (66) is rotatably connected to the bottom end of the telescopic rod (61), and the hollow circular tube (63) is movably connected to the front end of the frame (1).

2. The shock-absorbing wheelchair with adjustable footrest according to claim 1, characterized in that: The vehicle also comprises a wheel (2), a backrest (3), an armrest (4) and a seat cushion (5), wherein the wheel (2) is mounted on the bottom of the frame (1), the seat cushion (5) is fixed to the top of the frame (1) via a seat cushion bracket (7), the backrest (3) is mounted on one side of the frame (1) corresponding to the seat cushion (5), and the armrest (4) is provided in two pieces and is respectively mounted on both sides above the seat cushion (5).

3. The shock-absorbing wheelchair with adjustable footrest according to claim 2, characterized in that: The seat cushion bracket (7) comprises two hollow square tubes (71) arranged opposite to each other, the two hollow square tubes (71) are connected and fixed by a reinforcing shaft (75), the two hollow square tubes (71) are respectively arranged on both sides above the frame (1), an armrest connecting shaft (73) is fixed to the outer side of one end of the two hollow square tubes (71), and the bracket at the bottom of the armrest (4) is rotatably connected to the armrest connecting shaft (73); A T-shaped bracket (64) is fixed on one side of the top of the hollow circular tube (63), a telescopic square tube (65) is fixed on the side of the T-shaped bracket (64) corresponding to the hollow square tube (71), the telescopic square tube (65) is slidably inserted into the hollow square tube (71) on the corresponding side, and the two are fixed by a length adjustment knob (76); A frame connecting plate (74) is welded to the side of the bottom of the hollow square tube (71) corresponding to the wheel arm joint (13), and the frame connecting plate (74) is fixedly connected to the wheel arm joint (13) on the corresponding side via studs.

4. The shock-absorbing wheelchair with adjustable footrest according to claim 3, characterized in that: The wheel (2) comprises a front wheel (21) and a rear wheel (22), wherein the diameter of the front wheel (21) is smaller than the diameter of the rear wheel (22); the bottoms of the two front wheel arms (11) are rotatably connected to a front wheel hub frame (15), the lower part of the front wheel hub frame (15) is rotatably connected to the front wheel (21), the bottom of the two rear wheel arms (12) is fixed with a rear wheel hub frame (115), and the rear wheels (22) are rotatably connected to the two rear wheel hub frames (115).

5. The shock-absorbing wheelchair with adjustable footrest according to claim 4, characterized in that: The backrest (3) comprises a cushion (31) and a cushion frame (32), wherein the cushion (31) is fixed to the cushion frame (32), the cushion frame (32) is arranged above the support rod (110), and the two are fixedly connected via a bracket, and a corner plate reinforcement head (35) is arranged on a side of the cushion frame (32) corresponding to the connecting corner plate (112), and the corner plate reinforcement head (35) is rotatably connected to the connecting corner plate (112) on the corresponding side via a rotating shaft; An armrest mounting hole (33) is provided on a side of the back cushion frame (32) corresponding to the armrest (4), and one end of the armrest (4) is rotatably connected to the armrest mounting hole (33) on the corresponding side. A seat cushion bracket mounting hole (34) is provided on a side of the back cushion frame (32) corresponding to the hollow square tube (71), and an L-shaped connecting portion (72) is provided at one end of the hollow square tube (71), and the L-shaped connecting portion (72) is rotatably connected to the seat cushion bracket mounting hole (34) via a rotating shaft.

6. The shock-absorbing wheelchair with adjustable footrest according to claim 5, characterized in that: The shock absorber (111) comprises two bases (1111) arranged opposite to each other, the two bases (1111) are respectively fixed on the rear wheel arm connecting shaft (18) and the support rod (110), and the two bases (1111) are rotatably connected with a connecting block (1112), a hydraulic rod (1113) is fixed between the two connecting blocks (1112), a return spring (1114) is sleeved on the outside of the hydraulic rod (1113), and two ends of the return spring (1114) are respectively fixedly connected to the connecting block (1112) on the corresponding side.

7. The shock-absorbing wheelchair with adjustable footrest according to claim 6, characterized in that: A pedal pad joint (16) is fixed to the bottom of the front wheel arm reinforcement frame (14), and a pedal pad (8) is rotatably connected to one side below the front wheel arm reinforcement frame (14) through the pedal pad joint (16), and the pedal pad (8) is arranged in a close fit above the pedal (66).

8. The shock-absorbing wheelchair with adjustable footrest according to claim 7, characterized in that: A rear wheel arm mounting shaft hole (113) is provided on the inner wall of the two rear wheel arms (12) on the side corresponding to the rear wheel arm connecting shaft (18), and the two ends of the rear wheel arm connecting shaft (18) are rotatably connected to the rear wheel arm mounting shaft hole (113) on the corresponding side, and a rear wheel arm reinforcement frame (114) is welded between the two rear wheel arms (12), and the rear wheel arm reinforcement frame (114) is arranged on a side close to the two rear wheel hub frames (115).

9. The shock-absorbing wheelchair with adjustable footrest according to claim 5 or 8, characterized in that: A reinforcement buckle (116) is clamped between the cushion frame (32) and the support rod (110).

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