A wheelchair

Abstract

The utility model relates to a wheelchair, including axle, frame, front wheel group, rear wheel group and three -dimensional adjustable support, the frame is erected on the axle through three -dimensional adjustable support, three -dimensional adjustable support is by axle clamp assembly, support seat subassembly, lifting rod subassembly and frame clamp assembly constitutes, is used for adjusting seat width, seat depth and seat height respectively: axle clamp assembly realizes seat width left and right adjustment through clamp one, clamp two and connecting rod, support seat subassembly realizes seat depth front and back adjustment with slider, slide and positioning pin, lifting rod subassembly realizes seat height up and down adjustment through fixed pipe, movable pipe, pad high ring and positioning pin, frame clamp assembly fixes the frame through clamp three and C type hoop cover, and the bottom of clamp one is equipped with auxiliary wheel support, and its telescopic pipe and auxiliary wheel can promote wheelchair stability. The utility model realizes the flexible adaptation of seat three -dimensional size through modular adjustable structure, and the adjustment is convenient, and the structure is stable, can satisfy the demand of different users, and expands wheelchair applicable scene.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a wheelchair, which is particularly suitable for medical rehabilitation scenarios that require flexible adjustment according to the user's body shape and usage scenario. Background Technology

[0002] In existing technologies, traditional wheelchairs typically employ fixed-size seat designs or offer only single-dimensional adjustment (such as seat height). This design fails to meet the personalized needs of users of different body types (such as children, adults, and the elderly), easily leading to decreased comfort after prolonged sitting and potentially causing pressure injuries. Furthermore, some adjustable wheelchairs have complex adjustment mechanisms, are cumbersome to operate, and lack sufficient precision, making it difficult to achieve rapid and accurate parameter adaptation. Simultaneously, existing wheelchairs lack auxiliary stabilizing structures when dealing with different road conditions, posing safety hazards. Therefore, there is an urgent need to design a wheelchair that can achieve three-dimensional adjustment of seat height, seat depth, and seat width, while also possessing a simple structure and convenient adjustment.

[0003] Therefore, given the shortcomings of existing technologies, it is necessary to design a wheelchair to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a wheelchair that achieves precise adjustment of the three-dimensional dimensions of the seat through a modular adjustable structure, so as to adapt to the body shape needs of different users and improve riding comfort and safety.

[0005] To achieve the above and other related objectives, the technical solution provided by this utility model is: a wheelchair, including an axle, a frame, a front wheel assembly, and a rear wheel assembly. The frame is mounted on the axle via a three-dimensional adjustable bracket. The front wheel assembly is mounted on the front side of the frame, and the rear wheel assembly is mounted on both ends of the axle. The three-dimensional adjustable bracket is configured to adjust the seat height, seat depth, and seat width of the frame.

[0006] The preferred technical solution is as follows: the three-dimensional adjustable bracket is composed of an axle clamp assembly, a support seat assembly, a lifting rod assembly, and a frame clamp assembly; the axle clamp assembly is laterally adjustable on the axle for adjusting the seat width; the support seat assembly is longitudinally adjustable on the axle clamp assembly for adjusting the seat depth; the lifting rod assembly is vertically adjustable on the support seat assembly for adjusting the seat height; and the frame clamp assembly is mounted on the lifting rod assembly for fixed installation with the frame.

[0007] The preferred technical solution is as follows: the axle clamp assembly consists of clamp one, clamp two, and a connecting rod. Clamp one and clamp two can be adjusted left and right and fitted onto the axle and fastened by their respective bolts. Clamp one has a through hole one, and clamp two has a through hole two. One end of the connecting rod is inserted into the through hole one, and the other end is inserted into the through hole two. The connecting rod has two sets of threaded holes one. The two sets of bolts corresponding to clamp one and clamp two extend into the through hole one and through hole two, respectively, and are screwed into the two sets of threaded holes one.

[0008] The preferred technical solution is as follows: the support assembly consists of a slider, a slide block, and a seat depth positioning pin. The slider is fixed to the top of the clamp. The slide block is slidably mounted on the slider. The slider has multiple sets of seat depth positioning holes arranged in the front-back direction and extending through the left and right sides. The two side groove walls of the slide block have multiple sets of seat depth adjustment holes arranged in the front-back direction and corresponding to the left and right sides. The seat depth positioning pin is configured to be able to be inserted into the seat depth adjustment holes and the seat depth positioning holes.

[0009] The preferred technical solution is as follows: the lifting rod assembly consists of a fixed tube, a movable tube, a shim ring, a locking ring, and a seat height positioning pin. The fixed tube is fixed to the top of the slide block. The shim ring and the movable tube are sequentially sleeved on the fixed tube from bottom to top. The locking ring is sleeved on the movable tube. The fixed tube has multiple sets of seat height positioning holes arranged vertically and extending through the front and back. The movable tube has a seat height adjustment hole extending through the front and back. The locking ring has a seat height locking hole extending through the front and back. The seat height positioning pin is configured to be able to be inserted into the seat height locking hole, the seat height adjustment hole, and the seat height positioning hole.

[0010] The preferred technical solution is as follows: the frame clamp assembly consists of a clamp three and a C-shaped clamp sleeve. The clamp three is fixed to the top of the movable tube, the C-shaped clamp sleeve is sleeved on the frame, and the clamp three is tightened on the C-shaped clamp sleeve.

[0011] The preferred technical solution is as follows: the clamp three is configured as a C-shaped structure and includes a first clamp part and a second clamp part arranged opposite to each other. The first clamp part is provided with a stepped hole facing the second clamp part, the second clamp part is provided with a through hole facing the first clamp part, and the second clamp part is also provided with a mounting hole. The mounting hole communicates with the through hole. A connecting post is provided in the mounting hole. The connecting post is provided with a threaded hole two. The bolt of the clamp three is configured to be able to be tightened into the threaded hole two through the stepped hole and the through hole.

[0012] The preferred technical solution is as follows: the C-shaped clamp includes a horizontal support part, a C-shaped clamping part one and a C-shaped clamping part two. The C-shaped clamping part one and the C-shaped clamping part two are formed on the left and right sides of the horizontal support part and are arranged opposite to each other. The front and rear ends of the horizontal support part, the C-shaped clamping part one and the C-shaped clamping part two are formed with flange structures. The flange structures are matched and matched with the clamp three.

[0013] A preferred technical solution is as follows: the bottom of the clamp is provided with an installation tube arranged in the front-to-back direction, an auxiliary wheel bracket is inserted and fixed in the installation tube, the end of the auxiliary wheel bracket is provided with a telescopic tube, and the end of the telescopic tube is provided with an auxiliary wheel.

[0014] The preferred technical solution is as follows: the telescopic tube is sleeved on the end of the auxiliary wheel bracket, the end of the auxiliary wheel bracket is provided with multiple sets of telescopic adjustment holes arranged along the extension direction, the telescopic tube is provided with telescopic positioning holes, the telescopic adjustment holes and the telescopic positioning holes are correspondingly matched and fixed by telescopic positioning pins.

[0015] Due to the application of the above technical solution, the beneficial effects of this utility model are as follows:

[0016] This utility model provides a wheelchair that achieves precise adjustment of seat height, seat depth, and seat width through a three-dimensional adjustable frame, meeting the personalized needs of users with different body types. The axle clamp assembly achieves seat width adjustment through the cooperation of the clamp and connecting rod. The support seat assembly achieves graded seat depth adjustment through the sliding structure of the slider and the sliding seat and the positioning pin. The lifting rod assembly achieves multi-level fine adjustment of seat height through the sleeve of the fixed tube and the movable tube and the superposition of the padding ring. The synergistic effect of the three components makes the seat size adaptable to a wider range and improves riding comfort. In addition, the auxiliary wheel bracket at the bottom of the clamp uses a telescopic tube and telescopic positioning pin design to adjust the height of the auxiliary wheel according to the road conditions, providing additional support on slopes or uneven roads and enhancing the stability of the wheelchair. Each adjustment component adopts a plug-in positioning pin and bolt combination structure, which is convenient to operate and can be adjusted with one hand. The surface contact clamping design ensures that the frame does not wobble after being fixed, balancing adjustment efficiency and structural stability. It is suitable for use in multiple scenarios such as medical rehabilitation and elderly care. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the wheelchair structure involved in this utility model.

[0018] Figure 2 This is a schematic diagram of the three-dimensional adjustable support structure involved in this utility model.

[0019] Figure 3 This is a schematic diagram of the axle clamp assembly involved in this utility model.

[0020] Figure 4This is a schematic diagram of the support base assembly involved in this utility model.

[0021] Figure 5 This is a schematic diagram of the lifting rod assembly involved in this utility model.

[0022] Figure 6 This is a schematic diagram of the frame clamp assembly involved in this utility model. Detailed Implementation

[0023] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0024] Please see Figures 1-6 It should be noted that in the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Example:

[0027] like Figures 1 to 6As shown, according to an overall technical concept of the present invention, a wheelchair is provided, including an axle 1, a frame 2, a front wheel assembly 3 and a rear wheel assembly 4. The frame 2 is mounted on the axle 1 via a three-dimensional adjustable bracket. The front wheel assembly 3 is mounted on the front side of the frame 2, and the rear wheel assembly 4 is mounted on both ends of the axle 1. The three-dimensional adjustable bracket is configured to adjust the seat height, seat depth and seat width of the frame 2.

[0028] like Figures 1 to 6 As shown, in an exemplary embodiment of this utility model, the three-dimensional adjustable bracket consists of an axle clamp assembly 5, a support seat assembly 6, a lifting rod assembly 7, and a frame clamp assembly 8. The axle clamp assembly 5 is flexibly mounted on the axle 1 to adjust the seat width. The support seat assembly 6 is flexibly mounted on the axle clamp assembly 5 to adjust the seat depth. The lifting rod assembly 7 is flexibly mounted on the support seat assembly 6 to adjust the seat height. The frame clamp assembly 8 is mounted on the lifting rod assembly 7 and is used for fixed installation with the frame 2.

[0029] like Figures 1 to 6 As shown, in an exemplary embodiment of this utility model, the axle clamp assembly 5 consists of clamp one 51, clamp two 52 and connecting rod 53. Clamp one 51 and clamp two 52 can be adjusted left and right and fitted onto the axle 1 and fastened by their respective bolts. Clamp one 51 has a through hole one 511 and clamp two 52 has a through hole two 521. One end of the connecting rod 53 is inserted into through hole one 511 and the other end is inserted into through hole two 521. The connecting rod 53 has two sets of threaded holes one. The two sets of bolts corresponding to clamp one 51 and clamp two 52 extend into through hole one 511 and through hole two 521 respectively and are screwed into the two sets of threaded holes one.

[0030] like Figures 1 to 6 As shown, in an exemplary embodiment of this utility model, the support assembly 6 consists of a slider 61, a slide block 62, and a seat depth positioning pin (not shown). The slider 61 is fixed to the top of the clamp 51, and the slide block 62 is slidably disposed on the slider 61. The slider 61 is provided with multiple sets of seat depth positioning holes 611 arranged in the front-back direction and extending through the left and right sides. The two side groove walls of the slide block 62 are provided with multiple sets of seat depth adjustment holes 621 arranged in the front-back direction and corresponding to the left and right sides. The seat depth positioning pin is configured to be able to be inserted into the seat depth adjustment holes 621 and the seat depth positioning holes 611.

[0031] like Figures 1 to 6As shown, in an exemplary embodiment of this utility model, the lifting rod assembly 7 consists of a fixed tube 71, a movable tube 72, a padding ring 73, a locking ring 74, and a seat height fixing pin (not shown). The fixed tube 71 is fixed to the top of the slide block 62. The padding ring 73 and the movable tube 72 are sequentially sleeved on the fixed tube 71 from bottom to top. The locking ring 74 is sleeved on the movable tube 72. The fixed tube 71 is provided with multiple sets of seat height positioning holes 711 arranged vertically and extending through the front and back. The movable tube 72 is provided with a seat height adjustment hole 721 extending through the front and back. The locking ring 74 is provided with a seat height locking hole 741 extending through the front and back. The seat height positioning pin is configured to be able to be inserted into the seat height locking hole 741, the seat height adjustment hole 721, and the seat height positioning hole 711.

[0032] like Figures 1 to 6 As shown, in an exemplary embodiment of this utility model, the frame clamp assembly 8 is composed of clamp three 81 and C-shaped clamp 82. Clamp three 81 is fixed to the top of the movable tube 72, and C-shaped clamp 82 is sleeved on the frame 2. Clamp three 81 is tightened on C-shaped clamp 82.

[0033] like Figures 1 to 6 As shown, in an exemplary embodiment of this utility model, the clamp three 81 is configured as a C-shaped structure and includes a first clamp part 811 and a second clamp part 812 disposed opposite to each other. The first clamp part 811 is provided with a stepped hole 8111 opening toward the second clamp part 812. The second clamp part 812 is provided with a through hole 8121 opening toward the first clamp part 811. The second clamp part 812 is also provided with a mounting hole 8122, which communicates with the through hole 8121. A connecting post 83 is provided in the mounting hole 8122. The connecting post 83 is provided with a threaded hole two. The bolt of the clamp three 81 is configured to be tightened into the threaded hole two through the stepped hole 8111 and the through hole 8121.

[0034] like Figures 1 to 6 As shown, in an exemplary embodiment of this utility model, the C-shaped clamp 82 includes a horizontal support portion 821, a first C-shaped clamping portion 822, and a second C-shaped clamping portion 823. The first C-shaped clamping portion 822 and the second C-shaped clamping portion 823 are formed on the left and right sides of the horizontal support portion 821 and are arranged opposite to each other. The front and rear ends of the horizontal support portion 821, the first C-shaped clamping portion 822, and the second C-shaped clamping portion 823 are formed with flange structures, and the flange structures are matched and matched with the clamp 81.

[0035] like Figures 1 to 6 As shown, in an exemplary embodiment of this utility model, the bottom of the clamp 52 is provided with an installation tube 522 arranged in the front-back direction. An auxiliary wheel bracket 9 is inserted and fixed in the installation tube 522. The end of the auxiliary wheel bracket 9 is provided with a telescopic tube 10, and the end of the telescopic tube 10 is provided with an auxiliary wheel 11.

[0036] like Figures 1 to 6 As shown, in an exemplary embodiment of this utility model, the telescopic tube 10 is sleeved on the end of the auxiliary wheel bracket 9. The end of the auxiliary wheel bracket 9 is provided with multiple sets of telescopic adjustment holes arranged along the extension direction. The telescopic tube 10 is provided with telescopic positioning holes. The telescopic adjustment holes and the telescopic positioning holes are matched and fixed by telescopic positioning pins.

[0037] Therefore, this utility model has the following advantages:

[0038] This utility model provides a wheelchair that achieves precise adjustment of seat height, seat depth, and seat width through a three-dimensional adjustable frame, meeting the personalized needs of users with different body types. The axle clamp assembly achieves seat width adjustment through the cooperation of the clamp and connecting rod. The support seat assembly achieves graded seat depth adjustment through the sliding structure of the slider and the sliding seat and the positioning pin. The lifting rod assembly achieves multi-level fine adjustment of seat height through the sleeve of the fixed tube and the movable tube and the superposition of the padding ring. The synergistic effect of the three components makes the seat size adaptable to a wider range and improves riding comfort. In addition, the auxiliary wheel bracket at the bottom of the clamp uses a telescopic tube and telescopic positioning pin design to adjust the height of the auxiliary wheel according to the road conditions, providing additional support on slopes or uneven roads and enhancing the stability of the wheelchair. Each adjustment component adopts a plug-in positioning pin and bolt combination structure, which is convenient to operate and can be adjusted with one hand. The surface contact clamping design ensures that the frame does not wobble after being fixed, balancing adjustment efficiency and structural stability. It is suitable for use in multiple scenarios such as medical rehabilitation and elderly care.

[0039] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A wheelchair, comprising an axle, a frame, a front wheel assembly, and a rear wheel assembly, wherein the frame is mounted on the axle via a three-dimensional adjustable bracket, the front wheel assembly is rotatably mounted on the front side of the frame, and the rear wheel assembly is rotatably mounted on both ends of the axle, characterized in that: The three-dimensional adjustable bracket is configured to adjust the seat height, seat depth, and seat width of the frame; The three-dimensional adjustable bracket consists of an axle clamp assembly, a support seat assembly, a lifting rod assembly, and a frame clamp assembly. The axle clamp assembly is adjustable left and right on the axle to adjust the seat width. The support seat assembly is adjustable front and back on the axle clamp assembly to adjust the seat depth. The lifting rod assembly is adjustable up and down on the support seat assembly to adjust the seat height. The frame clamp assembly is mounted on the lifting rod assembly for fixed installation with the frame.

2. The wheelchair according to claim 1, characterized in that: The axle clamp assembly consists of clamp one, clamp two, and a connecting rod. Clamp one and clamp two can be adjusted left and right and fitted onto the axle and fastened by their respective bolts. Clamp one has a through hole one, and clamp two has a through hole two. One end of the connecting rod is inserted into the through hole one, and the other end is inserted into the through hole two. The connecting rod has two sets of threaded holes one. The two sets of bolts corresponding to clamp one and clamp two extend into the through hole one and through hole two, respectively, and are screwed into the two sets of threaded holes one.

3. A wheelchair according to claim 2, characterized in that: The support assembly consists of a slider, a slide block, and a seat depth positioning pin. The slider is fixed to the top of the clamp, and the slide block is slidably mounted on the slider. The slider has multiple sets of seat depth positioning holes arranged in the front-back direction and extending through the left and right sides. The two side groove walls of the slide block have multiple sets of seat depth adjustment holes arranged in the front-back direction and corresponding to the left and right sides. The seat depth positioning pin is configured to be able to be inserted into the seat depth adjustment holes and the seat depth positioning holes.

4. A wheelchair according to claim 3, characterized in that: The lifting rod assembly consists of a fixed tube, a movable tube, a shim ring, a locking ring, and a seat height positioning pin. The fixed tube is fixed to the top of the slide block. The shim ring and the movable tube are sequentially sleeved on the fixed tube from bottom to top. The locking ring is sleeved on the movable tube. The fixed tube has multiple sets of seat height positioning holes arranged vertically and extending through the front and back. The movable tube has a seat height adjustment hole extending through the front and back. The locking ring has a seat height locking hole extending through the front and back. The seat height positioning pin is configured to be able to be inserted into the seat height locking hole, the seat height adjustment hole, and the seat height positioning hole.

5. A wheelchair according to claim 4, characterized in that: The frame clamp assembly consists of a clamp three and a C-shaped clamp sleeve. The clamp three is fixed to the top of the movable tube, and the C-shaped clamp sleeve is fitted onto the frame. The clamp three is tightened onto the C-shaped clamp sleeve.

6. A wheelchair according to claim 5, characterized in that: The clamp three is configured as a C-shaped structure and includes a first clamp part and a second clamp part arranged opposite to each other. The first clamp part has a stepped hole opening towards the second clamp part, and the second clamp part has a through hole opening towards the first clamp part. The second clamp part also has a mounting hole, which communicates with the through hole. A connecting post is provided in the mounting hole, and the connecting post has a threaded hole two. The bolt of the clamp three is configured to be able to be tightened into the threaded hole two through the stepped hole and the through hole.

7. A wheelchair according to claim 5, characterized in that: The C-shaped clamp includes a horizontal support part, a C-shaped clamping part one, and a C-shaped clamping part two. The C-shaped clamping part one and the C-shaped clamping part two are formed on the left and right sides of the horizontal support part and are arranged opposite to each other. The front and rear ends of the horizontal support part, the C-shaped clamping part one, and the C-shaped clamping part two are formed with flange structures, and the flange structures are matched and matched with the clamp three.

8. A wheelchair according to claim 2, characterized in that: The bottom of the clamp is provided with an installation tube arranged in the front-to-back direction. An auxiliary wheel bracket is inserted and fixed in the installation tube. The end of the auxiliary wheel bracket is provided with a telescopic tube, and the end of the telescopic tube is provided with an auxiliary wheel.

9. A wheelchair according to claim 8, characterized in that: The telescopic tube is sleeved on the end of the auxiliary wheel bracket. The end of the auxiliary wheel bracket is provided with multiple sets of telescopic adjustment holes arranged along the extension direction. The telescopic tube is provided with telescopic positioning holes. The telescopic adjustment holes and the telescopic positioning holes are matched and fixed by telescopic positioning pins.

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