Folding wheelchair

Abstract

The present application relates to the technical field of medical instruments, and provides a folding wheelchair, for use in solving the technical problem of poor obstacle crossing performance and shock absorption performance of front wheels of existing folding wheelchairs. The folding wheelchair comprises a front supporting frame and front wheels; in a first direction, the front wheels are respectively arranged on two sides of the front supporting frame, and each front wheel is provided with a shock absorption assembly corresponding to the front wheel; each shock absorption assembly comprises a shock absorber mount and a shock absorber, the shock absorber mount is adapted to connect the corresponding front wheel and the front supporting frame, and the front wheels are configured as driven wheels of the folding wheelchair; one end of each shock absorber is hingedly connected to the front support frame, and the other end of the shock absorber is hingedly connected to the shock absorber mount; each shock absorber mount is configured to swing relative to the front supporting frame as the corresponding front wheel rises and falls in a second direction and to drive the corresponding shock absorber to deform in an expansion and contraction direction of the shock absorber. According to the folding wheelchair provided by the present application, the obstacle crossing performance and shock absorption performance of the front wheels can be improved.

Description

Folding wheelchair

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on July 24, 2023, with application number 202321957760.2 and application name “Folding Wheelchair”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of medical devices, and more specifically, to a folding wheelchair. Background Art

[0003] Folding wheelchairs are a means of transportation for special groups of people, such as the disabled, the elderly and the weak, and patients undergoing medical clinical rehabilitation. They are widely used because they can be folded, are easy to carry, and take up little space.

[0004] Existing folding wheelchairs consist of a front support frame and a rear support frame. The rear support frame is typically used to mount the rear wheels, while the front support frame is used to mount the front wheels. The rear wheels are typically used as driving wheels, while the front wheels are used as driven wheels. Users are increasingly demanding the comfort and mobility of folding wheelchairs, especially the obstacle-crossing and shock-absorbing performance of the front wheels.

[0005] However, the front wheels of existing folding wheelchairs have poor obstacle crossing performance and shock absorption performance, which cannot meet user needs.

[0006] Utility Model Content

[0007] The purpose of this application is to provide a folding wheelchair that can improve the obstacle crossing performance and shock absorption performance of the front wheels.

[0008] In order to achieve the above objectives, the embodiments of the present application provide the following technical solutions:

[0009] The folding wheelchair provided in the embodiment of the present application includes a front support frame and front wheels; the front wheels are respectively provided on both sides of the front support frame along a first direction, and each front wheel is provided with a shock-absorbing assembly corresponding thereto; the shock-absorbing assembly includes a shock-absorbing frame and a shock absorber, and the shock-absorbing frame is used to connect the front wheel and the front support frame, and the front wheel is configured as a driven wheel of the folding wheelchair; one end of the shock absorber is hinged to the front support frame, and the other end of the shock absorber is hinged to the shock absorber frame; the shock absorber frame is configured so that when the front wheel rises and falls along the second direction, the shock absorber frame swings relative to the front support frame and drives the shock absorber to deform along its telescopic direction.

[0010] In an optional embodiment, the shock absorber frame includes a first rotating part, a second rotating part and a third rotating part; the first rotating part is configured to be hinged to the front support frame, the second rotating part is configured to be hinged to the front wheel and linked with the front wheel; the third rotating part is configured to be hinged to one end of the shock absorber.

[0011] In an optional embodiment, the shock absorber frame includes at least one rocker arm; the rocker arm includes a first extension section, the first rotating part is arranged at the first end of the first extension section, and the second end of the first extension section extends obliquely downward along a third direction; the second rotating part and the third rotating part are located at the second end of the first extension section.

[0012] In an optional embodiment, the rocker arm also includes a second extension section; the first end of the second extension section is connected to the second end of the first extension section to form a connection, and the second connection portion is arranged at the connection; the second end of the second extension section extends obliquely upward along a third direction, and the third rotating portion is arranged at the second end of the second extension section.

[0013] In an optional embodiment, along the third direction, the third rotating portion is located on a side of the second rotating portion away from the first rotating portion; the shock absorber, the shock absorber frame and a portion of the front support frame form a triangular structure.

[0014] In an optional embodiment, the shock absorber frame includes two rocker arms arranged opposite to each other along a first direction, and a first connector for connecting the two rocker arms;

[0015] The first connector is located at the second end of the first extension segment.

[0016] In an optional embodiment, the second rotating portion is configured as a second axial hole; along the first direction, the second axial hole passes through the body of each of the rocker arms and the first connecting body.

[0017] In an optional embodiment, the folding wheelchair also includes a mudguard corresponding to each of the front wheels; the shock absorber frame also includes a second connector connecting the two rocker arms, and the second connector is arranged close to the first rotating part along the third direction; the second connector is provided with a fixing hole passing through it along the first direction, and the mudguard and the second connector are detachably connected by a fastener inserted into the fixing hole.

[0018] In an optional embodiment, the front wheel is configured as an omnidirectional wheel.

[0019] In an optional embodiment, the folding wheelchair further includes a backrest bracket, a rear support frame and rear wheels; the rear support frame and the front support frame are respectively hinged to the backrest bracket, and the rear wheels are mounted on the rear support frame.

[0020] Compared with the related art, the folding wheelchair provided in the embodiment of the present application has the following advantages:

[0021] The folding wheelchair provided in an embodiment of the present application comprises a shock absorber frame disposed between a front support frame and the front wheels, with one end of a shock absorber connected to the shock absorber frame and the other end of the shock absorber connected to the front support frame. Furthermore, the shock absorber frame is linked to the front wheels. When the folding wheelchair travels on bumpy roads, the shock absorber frame swings with the ups and downs of the front wheels, causing the shock absorber to deform and thereby achieve shock absorption.

[0022] Compared to related art folding wheelchairs without shock absorbers, this arrangement, with shock absorbers and a shock absorber frame installed between the front wheel and the front support frame, allows the shock absorber frame to have a certain swing range, increasing the height and height fluctuations of the front wheel, thereby improving the front wheel's obstacle-crossing performance and shock absorption effect. Furthermore, the shock absorber is linked to the front wheel through the shock absorber frame, which improves its reliability compared to solutions where the shock absorber is directly connected to the front wheel.

[0023] In addition to the technical problems solved by the embodiments of the present disclosure, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the folding wheelchair provided by the embodiments of the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG1 is a schematic structural diagram of a foldable wheelchair in an unfolded state provided by an embodiment of the present application;

[0025] FIG2 is a schematic diagram of the structure of the foldable wheelchair in the embodiment of the present application in the unfolded state;

[0026] FIG3 is a schematic structural diagram of a foldable wheelchair in a folded state according to an embodiment of the present application;

[0027] FIG4 is a schematic diagram of the structure of the foldable wheelchair provided in an embodiment of the present application in a folded state;

[0028] FIG5 is a schematic diagram of the assembly of the front wheel, shock absorbing assembly and front support frame provided in an embodiment of the present application;

[0029] FIG6 is an exploded schematic diagram of the front wheel, shock absorbing assembly and front support frame provided in an embodiment of the present application;

[0030] FIG7 is a schematic structural diagram of a shock absorbing assembly provided in an embodiment of the present application;

[0031] FIG8 is a schematic structural diagram of the shock-absorbing frame in FIG7 .

[0032] Reference numerals:

[0033] 10-front support frame;

[0034] 11-front wheel; 12-pedal; 13-mudguard;

[0035] 20-backrest bracket;

[0036] 30-rear support frame; 31-rear wheel;

[0037] 40-bracket connecting rod;

[0038] 50-seat link;

[0039] 60-seat bracket;

[0040] 70-handrail;

[0041] 80- shock mount;

[0042] 81- rocker arm;

[0043] 811-first extension section; 812-second extension section;

[0044] 82-first rotating part; 83-second rotating part; 84-third rotating part;

[0045] 85-first connector; 86-second connector;

[0046] 90-Shock absorber. DETAILED DESCRIPTION

[0047] As described in the background technology, the folding wheelchairs in the related art have poor obstacle crossing performance and shock absorption performance of the front wheels; the inventors have found that the reason for this problem is that the existing folding wheelchairs include a front support frame and a rear support frame, wherein the front support frame is used to install the front wheel, and the rear support frame is used to install the rear wheel, the rear wheel is the driving wheel, and the front wheel is the driven wheel, and the front wheel is directly installed on the front support frame through the front wheel fork arm, and there is no shock absorber between the two, resulting in poor obstacle crossing performance and shock absorption effect of the front wheel.

[0048] To address the above technical issues, the present invention provides a folding wheelchair in which a shock absorber frame is provided between the front support frame and the front wheel. One end of a shock absorber is connected to the shock absorber frame, and the other end of the shock absorber is connected to the front support frame. Furthermore, the shock absorber frame is linked to the front wheel. When the folding wheelchair travels on bumpy roads, the shock absorber frame swings with the ups and downs of the front wheel, causing the shock absorber to deform and achieve shock absorption.

[0049] This arrangement allows the shock absorber frame to swing within a certain range, increasing the front wheel's ability to rise and fall, thereby improving the front wheel's obstacle avoidance and shock absorption. Furthermore, compared to solutions where the shock absorber is directly connected to the front wheel, the linkage between the shock absorber and the front wheel through the shock absorber frame improves the shock absorber's reliability.

[0050] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0051] To facilitate the description of the embodiments of the present application, the coordinate system shown in the accompanying drawings is first explained, wherein the X-axis direction is the first direction, which can be the left or right direction of the folding wheelchair; the Z-axis direction is the second direction, which is the height direction of the folding wheelchair; and the Y-axis direction is the third direction, which can be the front or rear direction of the folding wheelchair.

[0052] As shown in Figures 1 to 4, the folding wheelchair provided in the embodiment of the present application includes a front support frame 10, a backrest frame 20, an armrest 70, a front wheel 11, a rear wheel 31, a rear support frame 30, a support link 40, a seat frame 60, a seat link 50 and a footrest 12; wherein the front support frame 10, the backrest frame 20, the rear support frame 30 and the support link 40 are hinged together to form a first link mechanism that can be folded and deformed.

[0053] The front support frame 10, the backrest frame 20, the seat frame 60, and the seat connecting rod 50 are hinged together to form a second connecting rod mechanism that can be folded and deformed, and the second connecting rod mechanism is linked with the first connecting rod mechanism to realize that the seat frame 60 is folded or unfolded when the folding wheelchair is unfolded or folded.

[0054] Specifically, the front support frame 10 is used to install the front wheel 11, also known as the front wheel bracket, and the pedals 12 are also installed at the front end of the front support frame 10 to provide foot support for the user. The rear support frame 30 is used to install the rear wheel 31, also known as the rear wheel bracket.

[0055] The backrest bracket 20 includes a first mounting portion and a second mounting portion, and the first mounting portion is used to install the backrest cushion of the folding wheelchair, and the second mounting portion is used to connect with the front support frame 10, the seat bracket 60, and the rear support frame 30, and the end of the front support frame 10 away from the front wheel 11 and the end of the rear support frame 30 away from the rear wheel 31 can be rotatably connected to the second mounting portion of the backrest bracket 20 respectively, and can rotate relative to the backrest bracket 20, that is, the front support frame 10 and the rear support frame 30 are both hinged to the backrest bracket 20 and can rotate relative to the backrest bracket 20 respectively.

[0056] A support link 40 is provided between the rear support frame 30 and the front support frame 10. The ends of the support link 40 are hingedly connected to the rear support frame 30 and the front support frame 10, respectively. That is, the front support frame 10, the backrest support 20, the rear support frame 30, and the support link 40 are rotatably connected to each other and form pivot points a, b, c, and d, forming a first, foldable and deformable linkage mechanism to enable the folding of the front support frame 10, the rear support frame 30, and the backrest support 20 of the folding wheelchair. When the folding wheelchair is in the unfolded state, the backrest support 20 and the rear support frame 30 limit and support each other, thereby forming a stable triangular structure with pivot points a, c, and d.

[0057] The above-mentioned seat connecting rod 50 is used to connect the seat bracket 60 and the front support frame 10, wherein one end of the seat connecting rod 50 is hinged to the seat bracket 60, and the other end of the seat connecting rod 50 is hinged to the front support frame 10, that is, the front support frame 10, the seat connecting rod 50, the seat bracket 60, and the backrest bracket 20 are hinged to each other and form a pivot point e, f, g, and a to form a second connecting rod mechanism that can be folded and deformed, so as to realize the follow-up folding of the seat bracket 60 during the folding and unfolding process of the folding wheelchair.

[0058] Based on the above embodiment, the folding wheelchair provided in the present embodiment has front wheels 11 disposed on either side of a front support frame 10 along a first direction. Front wheels 11 may be omnidirectional wheels, such as single-row continuously switching omnidirectional wheels or Mecanum wheels, enabling full omnidirectional movement and improving the folding wheelchair's obstacle-crossing capabilities. Each front wheel 11 is provided with a corresponding shock-absorbing assembly for providing shock absorption.

[0059] As shown in Figures 5 to 7, the shock absorption assembly includes a shock absorption frame 80 and a shock absorber 90. Along the third direction, the shock absorption frame 80 is arranged between the front wheel 11 and the front support frame 10. The shock absorption frame 80 is not only used to connect the front wheel 11 and the front support frame 10, but also can be used to install the shock absorber 90.

[0060] Along the third direction, one end of the shock absorber frame 80 is connected to the front support frame 10 and rotates relative to the front support frame 10; the other end of the shock absorber frame 80 can be connected to the front wheel 11, and the shock absorber frame 80 and the front wheel 11 can be linked, that is, when the front wheel 11 is driving on a bumpy road, when the front wheel 11 fluctuates up and down along the second direction, the shock absorber frame 80 can swing relative to the front support frame 10 as the front wheel 11 fluctuates.

[0061] The shock absorber 90 can be tilted along the third direction. One end of the shock absorber 90 is connected to the front support frame 10, and the other end of the shock absorber 90 is connected to the shock absorber frame 80, so that when the shock absorber frame 80 swings relative to the front support frame 10, the shock absorber 90 is deformed along its extension direction. This deformation includes contraction or extension to play a shock-absorbing role.

[0062] Compared to related art folding wheelchairs without shock absorbers, the present embodiment incorporates shock absorbers 90 and shock absorber mounts 80 between the front wheel 11 and the front support frame 10. The shock absorber mounts 80 have a defined swing range, increasing the height and depth of the front wheel 11, thereby enhancing the front wheel's 11's obstacle avoidance and shock absorption. Furthermore, compared to designs in which the shock absorber 90 is directly connected to the front wheel 11, the present embodiment utilizes a linkage between the shock absorber 90 and the front wheel 11 via the shock absorber mounts 80, thereby improving the reliability of the shock absorber 90.

[0063] Based on the above embodiment, the shock absorber frame 80 provided in the embodiment of the present application includes a first rotating portion 82, a second rotating portion 83, and a third rotating portion 84. The first rotating portion 82 is configured to be hingedly connected to the front support frame 10. That is, one end of the shock absorber frame 80 is hingedly connected to the front support frame 10 via the first rotating portion 82 and rotates relative to the front support frame 10. The second rotating portion 83 is configured to be hingedly connected to the front wheel 11 and to be linked with the front wheel 11. That is, the shock absorber frame 80 is connected to the front wheel 11 via the second rotating portion 83 and can be linked with the front wheel 11. For example, when the front wheel 11 is traveling on a bumpy road and has ups and downs, the shock absorber frame 80 can swing. The third rotating portion is configured to be hingedly connected to one end of the shock absorber 90. That is, the shock absorber frame 80 is connected to one end of the shock absorber 90 via the third mounting portion. When the shock absorber frame 80 swings, the shock absorber 90 can deform, thereby providing a shock-absorbing effect.

[0064] As shown in Figures 7 and 8, the shock absorber frame 80 includes at least one rocker arm 81, the rocker arm 81 includes a first extension section 811, and the first rotating part 82 is arranged at the first end of the first extension section 811. The first rotating part 82 can be a first axial hole arranged in the first extension section 811, and the first axial hole passes through the entire body of the rocker arm 81 along the first direction. The rocker arm 81 is rotatably connected to the front support frame 10 through a first rotating shaft inserted in the first axial hole.

[0065] The second end of the first extension section 811 extends obliquely downward along the third direction, wherein the second rotating portion 83 and the third rotating portion 84 can be arranged at the second end of the first extension section 811, wherein the first extension section 811 is linked to the front wheel 11 through the second rotating portion 83, and the first extension section 811 is connected to the shock absorber 90 through the third rotating portion 84. The embodiment of the present application does not limit the specific positions of the second rotating portion 83 and the third rotating portion 84 at the second end of the first extension section 811.

[0066] Furthermore, in some embodiments, to facilitate the arrangement of the second rotating portion 83 and the third rotating portion 84, the rocker arm 81 of the present embodiment further includes a second extension section 812, which is disposed proximate to the second end of the first extension section 811. The first end of the second extension section 812 is connected to the second end of the first extension section 811, forming a connection therebetween, and the second rotating portion 83 can be disposed at the connection; the second end of the second extension section 812 extends obliquely upward along a third direction, and the third rotating portion 84 is disposed at the second end of the second extension section 812.

[0067] For example, the second rotating portion 83 provided at the connection is configured as a second axial hole that extends through the entire connection in the first direction, so that the shock absorber frame 80 is connected to the front wheel 11 via the second rotating shaft inserted into the second axial hole, thereby achieving a linkage between the front wheel 11 and the shock absorber frame 80. The third rotating portion 84 can be a third axial hole, and the shock absorber frame 80 is connected to the shock absorber 90 by inserting the third rotating shaft into the third axial hole.

[0068] In some embodiments, the shock absorber 90, the shock absorber frame 80, and a portion of the front support frame 10 form a triangular structure. This arrangement can improve the reliability of the installation of the shock absorber 90. For example, along the third direction, the second end of the second extension section 812 is arranged closer to the front support frame 10 than its first end, that is, along the third direction, the third rotating portion 84 can be located on the side of the second rotating portion 83 close to the first rotating portion 82. Alternatively, the second end of the second extension section 812 is arranged farther away from the front support frame 10 than its first end, that is, along the third direction, the third rotating portion 84 can be located on the side of the second rotating portion 83 away from the first rotating portion 82. This embodiment is not limited to this.

[0069] Based on the above embodiments, the shock absorber frame 80 provided in the embodiment of the present application includes two rocker arms 81 and a first connector 85, and the two rocker arms 81 are arranged opposite to each other along a first direction. The first connector 85 is configured to connect the two rocker arms 81. For example, the first connector 85 and the two rocker arms 81 can be an integrated structure. Such an arrangement can improve the structural strength of the shock absorber frame 80.

[0070] For example, the first connector 85 can be disposed at the second end of the first extension section 811. For example, the first connector 85 is disposed at the junction of the first extension section 811 and the second extension section 812. Accordingly, the second axial hole extends through the body of the rocker arm 81 and the first connector 85 along the first direction to form the second rotating portion 83 of the shock absorber frame 80.

[0071] On the basis of the above embodiment, the folding wheelchair provided in the embodiment of the present application further includes a mudguard 13, which is mounted on the shock absorber frame 80 and can move with the shock absorber frame 80. Such a setting can avoid interference between the mudguard 13 and the front wheel 11.

[0072] Exemplarily, the shock absorber frame 80 further includes a second connector 86, which is disposed at the first extension section 811. For example, the second connector 86 is disposed between the two rocker arms 81, and along the first direction, the two ends of the second connector 86 are respectively connected to the two first extension sections 811, and the second connector 86 can be disposed close to the front support frame 10 along the third direction.

[0073] The second connector 86 and the two rocker arms 81 can be an integral structure. The second connector 86 is provided with a fixing hole passing through it along the first direction. The fender 13 and the second connector 86 are detachably connected by fasteners inserted into the fixing hole. Such a configuration makes it easy to replace the fender 13.

[0074] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A folding wheelchair, characterized in that: Including front support frame and front wheel; Along the first direction, the front wheels are respectively arranged on both sides of the front support frame, and each of the front wheels is provided with a corresponding shock absorbing assembly; The shock absorbing assembly comprises a shock absorbing frame and a shock absorber, wherein the shock absorbing frame is used to connect the front wheel and the front supporting frame, and the front wheel is configured as a driven wheel of the folding wheelchair; One end of the shock absorber is hinged to the front support frame, and the other end of the shock absorber is hinged to the shock absorber frame; The shock absorber frame is configured so that when the front wheel rises or falls along the second direction, the shock absorber frame swings relative to the front support frame and drives the shock absorber to deform along its telescopic direction.

2. The folding wheelchair according to claim 1, characterized in that: The shock absorbing frame includes a first rotating part, a second rotating part and a third rotating part; The first rotating part is configured to be hinged to the front support frame, the second rotating part is configured to be hinged to the front wheel and to be linked with the front wheel; the third rotating part is configured to be hinged to one end of the shock absorber.

3. The folding wheelchair according to claim 2, characterized in that: The shock mount includes at least one rocker arm; The rocker arm comprises a first extension section, the first rotating portion is arranged at a first end of the first extension section, and a second end of the first extension section extends obliquely downward along a third direction; The second rotating portion and the third rotating portion are located at the second end of the first extending section.

4. The folding wheelchair according to claim 3, characterized in that: The rocker arm also includes a second extension section; The first end of the second extension segment is connected to the second end of the first extension segment to form a connection point, and the second connection portion is arranged at the connection point; The second end of the second extension section extends obliquely upward along a third direction, and the third rotating portion is disposed at the second end of the second extension section.

5. The folding wheelchair according to claim 4, characterized in that: Along the third direction, the third rotating portion is located on a side of the second rotating portion away from the first rotating portion; The shock absorber, the shock absorbing frame and part of the front supporting frame form a triangular structure.

6. The folding wheelchair according to claim 3, characterized in that: The shock absorber frame comprises two rocker arms arranged opposite to each other along a first direction, and a first connecting body for connecting the two rocker arms; The first connector is located at the second end of the first extension section.

7. The folding wheelchair according to claim 6, characterized in that: The second rotating portion is configured as a second axial hole; Along the first direction, the second axial hole passes through the body of each rocker arm and the first connecting body.

8. The folding wheelchair according to claim 6, characterized in that: The folding wheelchair also includes a fender corresponding to each of the front wheels; The shock absorber frame further comprises a second connecting body connecting the two rocker arms, and along the third direction, the second connecting body is arranged close to the first rotating part; The second connecting body is provided with a fixing hole penetrating therethrough along the first direction, and the fender and the second connecting body are detachably connected via a fastener inserted into the fixing hole.

9. The folding wheelchair according to any one of claims 1 to 8, characterized in that: The front wheels are configured as omnidirectional wheels.

10. The folding wheelchair according to claim 9, characterized in that: The folding wheelchair also includes a backrest bracket, a rear support frame and rear wheels; The rear support frame and the front support frame are respectively hinged to the backrest support, and the rear wheel is installed on the rear support frame. On the support frame.

Images