Wheelchair with liftable rear wheels
By setting up a rear auxiliary wheel with air support and rotary movable connection on the wheelchair, the problem of difficulty in passing existing wheelchairs in road barriers is solved, and the wheelchair is easily driven on bumpy roads is improved, and the user's independent passability is improved.
Patent Information
- Application Number
- CN202420616630.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-28
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-03-28
AI Technical Summary
Existing wheelchairs are difficult to pass in the face of uneven terrain and bumpy roads, and are difficult to pass due to the user's own weight.
A wheelchair with rear wheel liftable rear wheels is designed. By setting air support on the wheelchair frame, the rear auxiliary wheel can be lifted. The subsequent auxiliary wheel is a support point, and the wheelchair can easily cross road barriers. Specifically, the rotary movable connection including the cylinder section and the telescopic section is realized. The height of the rear auxiliary wheel is adjusted through the control lever and the pulling line, and the coordination of the main wheel and the front auxiliary wheel is combined to achieve the smooth driving of the wheelchair on bumpy roads.
It has achieved the ability of wheelchairs to easily overcome obstacles on bumpy roads, improves users' driving convenience and ability, and reduces their dependence on assistance to others.
Smart Images
Figure CN222218088U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wheelchairs, in particular to a wheelchair with liftable rear wheels. Background Art
[0002] Wheelchairs can not only be used as a means of transportation for the physically disabled, but also an important rehabilitation tool. Common wheelchairs include a wheelchair frame, wheels, a seat and a brake device, etc. Users can use wheelchairs to exercise and participate in social activities.
[0003] At present, most wheelchairs have simple functions and can meet the needs of users. However, when encountering obstacles such as uneven terrain and bumpy roads, ordinary wheelchairs are difficult to pass. Even with the help of others, it is difficult for others to assist in passing due to the influence of the user's own weight. Utility Model Content
[0004] In view of the defects of the above-mentioned prior art, the purpose of the utility model is to provide a wheelchair with liftable rear wheels to solve the problem of free passage of users when there are obstacles on the road.
[0005] The purpose of the utility model is achieved by the following technical solutions:
[0006] A wheelchair with liftable rear wheels comprises a wheelchair frame, rear auxiliary wheels and a gas strut, wherein the wheelchair frame comprises a lower body frame, the lower body frame comprises a fixed frame and a rotating frame rotatably connected to the fixed frame, the rear auxiliary wheels are arranged at the end of the rotating frame, the cylinder section of the gas strut is rotatably connected to the fixed frame, and the telescopic section of the gas strut is rotatably connected to the rotating frame.
[0007] Furthermore, the wheelchair includes a first rotating shaft, a first rotating frame is provided on the fixed frame, the first rotating shaft is provided on the first rotating frame, a first connecting piece is fixed to the front end of the cylinder section, the first connecting piece is sleeved on the first rotating shaft and rotates on the first rotating frame along with the first rotating shaft.
[0008] Furthermore, the wheelchair includes a second rotating shaft, a second rotating frame is provided at the end of the rotating frame, the second rotating shaft is provided on the second rotating frame, the end of the telescopic section is sleeved in the second connecting piece, the second connecting piece is sleeved on the second rotating shaft and rotates on the second rotating frame with the second rotating shaft.
[0009] Furthermore, one end of the second connecting member is provided with a sleeve for inserting the telescopic section, and the other end is provided with an axial hole for the second rotating shaft to pass through. A movable groove is provided in the middle of the second connecting member, and a control rod is provided in the movable groove. The bottom of the control rod is rotatably connected to the second connecting member, and the middle of the control rod abuts against the end of the telescopic section. The control rod moves in the movable groove, and a pulling wire is fixed on the control rod.
[0010] Furthermore, a third rotating shaft is inserted into the bottom of the control rod, a third rotating hole is opened on the second connecting member, and the third rotating shaft is inserted into the third rotating hole.
[0011] Furthermore, a fourth rotating shaft is inserted into the end of the fixing frame, a fourth rotating hole is opened at the front end of the rotating frame, and the fourth rotating shaft is inserted into the fourth rotating hole.
[0012] Furthermore, a connecting tube is provided at the end of the fixing frame, the fourth rotating shaft is inserted in the connecting tube, and a bearing is provided between the connecting tube and the fourth rotating shaft.
[0013] Furthermore, a front auxiliary wheel is fixed to the front end of the fixing frame.
[0014] Furthermore, the wheelchair includes a brake handle, and the brake handle is connected to the pulling line.
[0015] Furthermore, the wheelchair includes two main wheels, which are respectively fixed on both sides of the wheelchair frame.
[0016] The beneficial effect of the utility model is that the utility model raises the rear auxiliary wheel by arranging the gas support, and with the rear auxiliary wheel as the support point, the wheelchair can easily pass over the road obstacle, which is conducive to the wheelchair traveling on the rough road. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural schematic diagram of the wheelchair with liftable rear wheels of the utility model;
[0018] Figure 2 This is one of the partial structural schematic diagrams of the wheelchair with liftable rear wheels of the utility model;
[0019] Figure 3 This is the second schematic diagram of the partial structure of the wheelchair with liftable rear wheels of the utility model;
[0020] Figure 4 It is a structural schematic diagram of the second connecting member in the utility model;
[0021] Figure 5 It is a cross-sectional schematic diagram of the second connecting member in the utility model;
[0022] Figure 6 It is a structural schematic diagram of the second connecting member and the control rod in the utility model.
[0023] In the figure: 1. wheelchair frame; 2. lower body frame; 21. fixed frame; 22. rotating frame; 23. fourth rotating hole; 3. rear auxiliary wheel; 4. gas strut; 41. cylinder section; 42. telescopic section; 5. first rotating axis; 6. first rotating frame; 7. first connecting piece; 8. second rotating axis; 9. second rotating frame; 10. second connecting piece; 101. sleeve; 102. shaft hole; 103. movable slot; 104. third rotating hole; 11. control lever; 12. pulling line; 13. third rotating axis; 14. fourth rotating axis; 15. bearing; 16. front auxiliary wheel; 17. main wheel; 18. connecting tube. DETAILED DESCRIPTION
[0024] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clearly understood, the utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0025] The utility model provides a wheelchair with liftable rear wheels. Figures 1 to 6 As shown, the wheelchair comprises a wheelchair frame 1, rear auxiliary wheels 3 and a gas strut 4. The wheelchair frame 1 comprises a lower body frame 2. The lower body frame 2 comprises a fixed frame 21 and a rotating frame 22 rotatably connected to the fixed frame 21. The rear auxiliary wheels 3 are arranged at the end of the rotating frame 22. The cylinder section 41 of the gas strut 4 is rotatably movably connected to the fixed frame 21. The telescopic section 42 of the gas strut 4 is rotatably movably connected to the rotating frame 22.
[0026] The gas strut 4 includes a cylinder section 41 and a telescopic section 42 that can be movably extended and retracted along the cylinder section 41. Since the fixed frame 21 and the rotating frame 22 are rotatably connected, when the telescopic section 42 of the gas strut 4 is extended and retracted, the rotating frame 22 will rotate relative to the fixed frame 21. Since the rear auxiliary wheel 3 is fixed on the rotating frame 22, the rear auxiliary wheel 3 will also rotate. During the rotation, the height of the rear auxiliary wheel 3 will change, so as to cope with different road obstacles and have a wider range of usage scenarios.
[0027] When the wheelchair is traveling on a flat road, the length of the telescopic section 42 is adjusted so that the rotating frame 22 and the fixed frame 21 are in the same straight line. At this time, the rotating frame 22 serves as an extension of the fixed frame 21 and supports the rear auxiliary wheels 3 to travel on a flat road; when the wheelchair is traveling on a bumpy road, the length of the telescopic section 42 is reduced so that the rotating frame 22 rotates counterclockwise relative to the fixed frame 21, the rear auxiliary wheels 3 are lifted and the height is increased, the entire wheelchair body can be tilted backward with the rear auxiliary wheels 3 as the support point, the front wheels of the wheelchair are lifted, and the road obstacles are easily overcome.
[0028] The wheelchair further includes a first rotating shaft 5, a first rotating frame 6 is provided on the fixed frame 21, the first rotating shaft 5 is provided on the first rotating frame 6, a first connecting member 7 is fixed to the front end of the cylinder section 41, the first connecting member 7 is sleeved on the first rotating shaft 5 and rotates with the first rotating shaft 5 on the first rotating frame 6. Through the above arrangement, the rotation of the cylinder section 41 of the gas strut 4 relative to the fixed frame 21 is realized.
[0029] The wheelchair includes a second rotating shaft 8, a second rotating frame 9 is provided at the end of the rotating frame 22, the second rotating shaft 8 is provided on the second rotating frame 9, the end of the telescopic section 42 is sleeved in the second connecting member 10, the second connecting member 10 is sleeved on the second rotating shaft 8 and rotates on the second rotating frame 9 with the second rotating shaft 8. Through the above arrangement, the rotation of the telescopic section 42 of the gas strut 4 relative to the rotating frame 22 is realized.
[0030] When the gas strut 4 is extended or retracted, the rotating frame 22 rotates relative to the fixed frame 21, and the rear auxiliary wheel 3 is lifted. During the lifting process, the angle of the gas strut 4 relative to the fixed frame 21 and the rotating frame 22 changes. Therefore, the first rotating axis 5 and the second rotating axis 8 are arranged to adapt to the change in the angle of the gas strut 4 relative to the fixed frame 21 and the rotating frame 22.
[0031] One end of the second connecting member 10 is provided with a sleeve 101 for inserting the telescopic section 42, and the other end is provided with an axial hole 102 for the second rotating shaft 8 to pass through. A movable groove 103 is provided in the middle of the second connecting member 10, and a control rod 11 is provided in the movable groove 103. The bottom of the control rod 11 is rotatably connected to the second connecting member 10, and the middle of the control rod 11 contacts the end of the telescopic section 42. The control rod 11 moves in the movable groove 103, and a pulling line 12 is fixed on the control rod 11.
[0032] When the pulling wire 12 is pulled up, the pulling wire 12 will drive the control rod 11 to rotate relative to the second connecting member 10, and the control rod 11 moves in the moving groove 103. During the movement, the control rod 11 contacts the end of the telescopic section 42 and causes the telescopic section 42 to expand and contract, thereby realizing the rotation of the rotating frame 22.
[0033] The third rotating shaft 13 is inserted into the bottom of the control rod 11, and the second connecting member 10 is provided with a third rotating hole 104, in which the third rotating shaft 13 is inserted. Through the above arrangement, the rotation of the control rod 11 relative to the second connecting member 10 is realized.
[0034] The fourth rotating shaft 14 is inserted into the end of the fixing frame 21, and the front end of the rotating frame 22 is provided with a fourth rotating hole 23, and the fourth rotating shaft 14 is inserted into the fourth rotating hole 23. Further, the end of the fixing frame 21 is provided with a connecting cylinder 18, and the fourth rotating shaft 14 is inserted into the connecting cylinder 18, and a bearing 15 is provided between the connecting cylinder 18 and the fourth rotating shaft 14.
[0035] The middle portion of the fourth rotating shaft 14 is inserted into the connecting tube 18 , and both ends are inserted into the fourth rotating holes 23 .
[0036] The front auxiliary wheel 16 is fixed to the front end of the fixing frame 21. The wheelchair includes two main wheels 17, which are respectively fixed on both sides of the wheelchair frame 1. The rear auxiliary wheel 3 cooperates with the main wheels 17 and the front auxiliary wheel 16 to easily cross the roadblock.
[0037] The wheelchair comprises a brake handle, which is connected to a pulling line 12. The control lever 11 is adjusted by the brake handle to adjust the lifting of the rear auxiliary wheel 3 and the lifting height.
[0038] The working principle of the utility model is as follows: when the wheelchair is traveling on a flat road section, the rotating frame 22 and the fixed frame 21 are in the same straight line, and the rear auxiliary wheel 3 cooperates with the main wheel 17 and the front auxiliary wheel 16 to travel on the flat road; when the road is bumpy or encounters a roadblock, the brake handle is pressed, the brake handle drives the pulling line 12, the pulling line 12 drives the control rod 11 to rotate relative to the second connecting member 10, the control rod 11 moves in the moving groove 103 and moves against the end of the telescopic section 42 in the moving groove 103, the telescopic section 42 is squeezed and shortened, at this time the rotating frame 22 will rotate relative to the fixed frame 21, the rear auxiliary wheel 3 is lifted, the pusher supports the entire body of the wheelchair with the rear auxiliary wheel 3, the entire body of the wheelchair is tilted backward, the front auxiliary wheel 16 is tilted backward, it can easily cross the roadblock, making the wheelchair walking easier and more convenient.
[0039] The utility model provides a gas support 4 to lift the rear auxiliary wheel 3. With the rear auxiliary wheel 3 as a support point, the wheelchair can easily pass over road obstacles, which is beneficial for the wheelchair to travel on rough roads.
[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall fall within the protection scope of the present invention.
Claims
1. A wheelchair with liftable rear wheels, characterized in that: The wheelchair comprises a wheelchair frame (1), a rear auxiliary wheel (3) and a gas strut (4); the wheelchair frame (1) comprises a lower body frame (2); the lower body frame (2) comprises a fixed frame (21) and a rotating frame (22) rotatably connected to the fixed frame (21); a rear auxiliary wheel (3) is provided at the end of the rotating frame (22); a cylinder section (41) of the gas strut (4) is rotatably movably connected to the fixed frame (21); and a telescopic section (42) of the gas strut (4) is rotatably movably connected to the rotating frame (22).
2. A wheelchair with liftable rear wheels according to claim 1, characterized in that: The wheelchair comprises a first rotating shaft (5), a first rotating frame (6) is provided on the fixed frame (21), the first rotating shaft (5) is provided on the first rotating frame (6), a first connecting member (7) is fixed to the front end of the cylinder section (41), the first connecting member (7) is sleeved on the first rotating shaft (5) and rotates on the first rotating frame (6) along with the first rotating shaft (5).
3. A wheelchair with liftable rear wheels according to claim 1, characterized in that: The wheelchair comprises a second rotating shaft (8) and a second connecting member (10); a second rotating frame (9) is provided at the end of the rotating frame (22); the second rotating shaft (8) is provided on the second rotating frame (9); the end of the telescopic section (42) is sleeved in the second connecting member (10); the second connecting member (10) is sleeved on the second rotating shaft (8) and rotates on the second rotating frame (9) along with the second rotating shaft (8).
4. A wheelchair with liftable rear wheels according to claim 3, characterized in that: One end of the second connecting member (10) is provided with a sleeve (101) for the telescopic section (42) to be inserted into, and the other end is provided with an axial hole (102) for the second rotating shaft (8) to pass through. A movable groove (103) is provided in the middle of the second connecting member (10), and a control rod (11) is provided in the movable groove (103). The bottom of the control rod (11) is rotatably connected to the second connecting member (10), the middle of the control rod (11) abuts against the end of the telescopic section (42), and the control rod (11) moves in the movable groove (103). A pulling wire (12) is fixed to the control rod (11).
5. A wheelchair with liftable rear wheels according to claim 4, characterized in that: A third rotating shaft (13) is inserted into the bottom of the control rod (11), a third rotating hole (104) is opened on the second connecting member (10), and the third rotating shaft (13) is inserted into the third rotating hole (104).
6. A wheelchair with liftable rear wheels according to claim 1, characterized in that: A fourth rotating shaft (14) is inserted into the end of the fixed frame (21), a fourth rotating hole (23) is opened at the front end of the rotating frame (22), and the fourth rotating shaft (14) is inserted into the fourth rotating hole (23).
7. A wheelchair with liftable rear wheels according to claim 6, characterized in that: A connecting tube (18) is provided at the end of the fixing frame (21), the fourth rotating shaft (14) is inserted into the connecting tube (18), and a bearing (15) is provided between the connecting tube (18) and the fourth rotating shaft (14).
8. The wheelchair with rear wheels that can be lifted according to claim 1, characterized in that: A front auxiliary wheel (16) is fixed to the front end of the fixing frame (21).
9. A wheelchair with rear wheels that can be lifted according to claim 4, characterized in that: The wheelchair comprises a brake handle, and the brake handle is connected to the pulling line (12).
10. The wheelchair with rear wheels that can be lifted according to claim 1, characterized in that: The wheelchair comprises main wheels (17), and the main wheels (17) are two and are respectively fixed on two sides of the wheelchair frame (1).