Folding electric wheelchair
By designing limiting parts and locking parts in electric wheelchairs to form a stable support structure and using disassembly and rotation mechanisms to achieve compact folding, the problem of insufficient stability and portability during use and storage of existing electric wheelchairs is solved, and the problem of insufficient stability and portability during use and storage is improved. Portability and functionality.
Patent Information
- Application Number
- CN202420761800.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-12
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-04-12
AI Technical Summary
Existing folding wheelchairs have problems of insufficient stability and portability when used and stored, especially when electric wheelchairs are difficult to ensure structural stability and space efficiency during folding and deploying.
A folding electric wheelchair including the main frame, the rear frame, the seat and the support rod is designed. The stable support structure of the frame and the seat is realized through the limiting parts and locking parts, forming a triangular structural support during use. The human body and the compact folding of the wheelchair is achieved through disassembly and rotation mechanisms, and the auxiliary wheel set helps transfer after folding.
It improves the stability and comfort of the wheelchair when used, and reduces the space after folding, making it easy to carry, and enhances the portability and functionality of the electric wheelchair.
Smart Images
Figure CN222195306U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of electric wheelchairs, in particular to a foldable electric wheelchair. Background Art
[0002] Wheelchairs are a means of transportation for special groups of people, such as the disabled, the elderly and the weak, as well as patients undergoing medical clinical rehabilitation. Currently, most wheelchairs on the market are hand-cranked. After their appearance, electric wheelchairs have been loved by the public because they are more convenient and labor-saving, and have great market prospects.
[0003] A foldable wheelchair is one of the traditional types of hand-cranked wheelchairs. It can be folded when stored to reduce the space occupied and unfolded when used, thus having good portability. The inventor intends to provide a foldable electric wheelchair. Utility Model Content
[0004] The utility model aims to provide a foldable electric wheelchair, and its advantage is to provide a folding method for the electric wheelchair.
[0005] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides the following technical solutions: a foldable electric wheelchair, comprising:
[0006] A main frame and a tail frame rotatably connected to the main frame, wherein wheels are mounted on the main frame and the tail frame;
[0007] A first limiting member for limiting the maximum angle between the main frame and the tail frame in a use state;
[0008] A seat mounted on the main frame, the seat comprising a backrest and a seat cushion respectively rotatably connected to the main frame, a support rod being mounted on the seat cushion, and an end of the support rod being detachably fixed to the main frame; and
[0009] A second limiting member is used to limit the maximum angle between the backrest and the main frame.
[0010] Through the above technical scheme, when in use, the main frame and the tail frame are opened, the first limiter limits the maximum angle between the main frame and the tail frame, a stable triangular structure is formed between the main frame, the tail frame and the ground to support the vehicle body, the end of the support rod is fixed on the main frame, the support frame, the seat and the main frame form a stable triangular structure to support the human body, the rotation angle of the backrest is limited by the second limiter, the backrest supports the back when it is opened to the maximum angle compared to the seat, and the end of the support rod is separated from the main frame when folding, and then the vehicle is lifted and tilted so that the main frame, the tail frame, the backrest and the seat cushion rotate and fit together due to their own gravity, thereby completing the folding and storage of the wheelchair.
[0011] In one embodiment of the utility model, the end of the support rod is rotatably connected to the seat cushion, and a support block is fixed on the main frame to apply a supporting force to the support rod so that the seat cushion and the main frame maintain an inclination angle when in use. The main frame is also provided with a locking member for locking the support rod to the support block.
[0012] Through the above technical solution, when the wheelchair is in use, the end of the support rod is overlapped on the support block, and the locking member locks and fixes the end of the support rod to the support block, thereby achieving the fixation of the support rod to the main frame, so that a stable triangular structure is formed between the support rod, the seat and the main frame to support the human body.
[0013] In one embodiment of the utility model, the locking member is configured as a locking pin which is slidably assembled on the main frame and slides along the axial direction, and the support rod is provided with an opening matched with the locking pin.
[0014] Through the above technical solution, when the locking pin is inserted into the supporting rod, the supporting rod is locked and fixed on the main frame, and when the locking pin is pulled out, the supporting rod is separated from the main frame.
[0015] In an embodiment of the present invention, the wheels include a steering wheel mounted on the main frame and a driving wheel mounted on the tail frame, and a driving member for driving the driving wheel to rotate is disposed on the tail frame.
[0016] Through the above technical solution, the steering wheel controls the steering of the wheelchair when it moves, and the driving member drives the driving wheel to rotate and then drives the wheelchair to move.
[0017] In one embodiment of the present invention, the second limiting member is configured as a second limiting pin, the second limiting pin is fixed to the backrest, and a second sliding groove for quantitative sliding of the second limiting pin is provided on the main frame.
[0018] Through the above technical solution, the length of the second sliding groove is the moving range of the second limit pin, thereby limiting the maximum angle of the backrest compared to the main frame, thereby providing support for the back of the human body when the backrest is fixed.
[0019] In one embodiment of the utility model, a locking hook and a locking pin are further included for locking the backrest and the seat cushion. When the seat cushion rotates toward the main frame, the locking pin and the locking hook are disengaged, and when the backrest is opened relative to the seat cushion, the locking hook and the locking pin are locked.
[0020] Through the above technical solution, the backrest will not easily fall toward the seat cushion when in use, thereby enhancing the stability of the wheelchair when in use.
[0021] In one embodiment of the utility model, the lock hook is rotatably connected to the backrest, the lock pin is fixed to the seat cushion, the lock hook and the seat cushion are linked by a linkage pin, and when the seat cushion rotates, the lock hook is driven to rotate, thereby causing the lock pin to disengage or engage with the lock hook.
[0022] Through the above technical solution, the backrest will not easily fall toward the seat cushion when in use, thereby enhancing the stability of the wheelchair when in use.
[0023] In one embodiment of the present invention, the armrests and pedals, as well as the storage bag, are installed on the main frame.
[0024] Through the above technical solution, the armrests and pedals are used to support the human body and improve the comfort during use, and the storage bag is used to store some items and enhance the functionality of the wheelchair during use.
[0025] In one embodiment of the present invention, an auxiliary wheel set is further included for contacting the ground instead of the wheels after the vehicle is folded.
[0026] The above technical solution makes it easy to transfer the wheelchair after it is folded.
[0027] In one embodiment of the utility model, the auxiliary wheel set includes a first auxiliary wheel installed on the tail frame and a second auxiliary wheel installed on the seat cushion, the second auxiliary wheel is connected to the seat cushion through an extension bracket, the extension bracket is located on the rear side of the seat cushion, and the first auxiliary wheel and the second auxiliary wheel contact the ground after the wheelchair rotates.
[0028] Through the above technical solution, the wheelchair can be folded by lifting the extension bracket, which drives the seat cushion to fall toward the main frame when it is lifted, and continues to lift when the seat cushion abuts against the main frame, so that the main frame rotates, the tail frame is lifted and falls toward the main frame under the action of gravity on the body, and at the same time the backrest falls toward the main frame to complete the folding of the wheelchair.
[0029] As described above, the foldable electric wheelchair of the utility model has the following beneficial effects:
[0030] When in use, the main frame and the tail frame are opened, and the first limiter limits the maximum angle between the main frame and the tail frame, and a stable triangular structure is formed between the main frame, the tail frame and the ground to support the vehicle body, and the end of the support rod is fixed on the main frame, and the support frame, the seat and the main frame form a stable triangular structure to support the human body. The rotation angle of the backrest is limited by the second limiter, and the backrest supports the back when it is opened to the maximum angle compared to the seat. When folding, the end of the support rod is separated from the main frame, and then the vehicle is lifted and tilted so that the main frame, the tail frame, the backrest and the seat cushion rotate and fit together due to their own gravity, thereby completing the folding and storage of the wheelchair. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] Figure 1 Shown is a schematic diagram of a foldable electric wheelchair disclosed in an embodiment of the present utility model.
[0032] Figure 2 Shown is a schematic diagram of an oblique rear view of a foldable electric wheelchair disclosed in an embodiment of the utility model.
[0033] Figure 3 Display as Figure 2 Enlarged schematic diagram of part A.
[0034] Figure 4 Shown is a schematic diagram of the connection of the rotating parts of the foldable electric wheelchair disclosed in the embodiment of the utility model.
[0035] Figure 5 Shown is a schematic diagram of fixing the support rod of the foldable electric wheelchair disclosed in an embodiment of the utility model.
[0036] Figure 6 Shown is a schematic diagram of the connection between the backrest and the main frame of the foldable electric wheelchair disclosed in the embodiment of the utility model.
[0037] Description of technical feature numbers in the accompanying drawings:
[0038] 1. Main frame; 2. Tail frame; 3. First limiter; 4. Backrest; 5. Cushion; 6. Support rod; 7. Second limiter; 8. Support block; 9. Locking member; 10. Steering wheel; 11. Driving wheel; 12. Driving member; 13. Second sliding groove; 14. Lock hook; 15. Lock pin; 16. Linkage pin; 17. Rotating member; 18. Connecting rod; 19. First auxiliary wheel; 20. Second auxiliary wheel; 21. Extension bracket; 22. Auxiliary bracket; 23. Bracket; 24. Armrest; 25. Pedal; 26. Storage bag. DETAILED DESCRIPTION
[0039] The following specific embodiments illustrate the implementation of the present invention, and those familiar with the technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.
[0040] See also Figure 1 The utility model provides a foldable electric wheelchair, comprising:
[0041] A main frame 1 and a tail frame 2 rotatably connected to the main frame 1, wheels are installed on the main frame 1 and the tail frame 2, the wheels include a steering wheel 10 installed on the end of the main frame 1 away from the tail frame 2 and a driving wheel 11 installed on the end of the tail frame 2 away from the main frame 1, a driving member 12 for driving the driving wheel 11 to rotate is provided on the tail frame 2, the driving member 12 is set as a motor, and the driving member 12 drives the driving wheel 11 to rotate and thus drives the wheelchair to move.
[0042] See also Figure 1 , and also includes a first limiter 3 for limiting the maximum angle between the main frame 1 and the tail frame 2 when the wheels touch the ground, that is, when the wheelchair is unfolded and used normally. The first limiter 3 is set as a limiter plate, and the limiter plate is welded and fixed on the main frame 1. When the tail frame 2 reaches the maximum angle with the main frame 1, the tail frame 2 abuts against the limiter plate. When the wheelchair is in use, a stable triangular structure is formed between the main frame 1, the tail frame 2 and the ground to support the wheelchair, and the stability is strong.
[0043] See also Figure 1 and Figure 2 , and also includes a seat installed on the main frame 1, the seat includes a backrest 4 and a cushion 5 which are respectively rotatably connected to the main frame 1, the cushion 5 includes a bracket 23 and a cushion fixed to the bracket 23 by screws, a support rod 6 is installed on the bracket 23 of the cushion 5, the support rod 6 includes a vertical rod and a cross rod welded and fixed to the end of the vertical rod, one end of the vertical rod away from the cross rod is rotatably connected to the bracket 23 through a rotating shaft, and the end of the cross rod of the support rod 6 is detachably fixed to the main frame 1.
[0044] See also Figure 1 and Figure 5 A support block 8 is fixed on the main frame 1 for applying a supporting force to the support rod 6 so that the seat cushion 5 maintains a specific inclination angle with the main frame 1. A support groove is provided on the support block 8 for only the cross bar of the support rod 6 to be placed. A locking member 9 for locking and fixing the support rod 6 to the support block 8 is also provided on the main frame 1. The locking member 9 is configured as a locking pin 15 that is slidably assembled on the main frame 1 and slides along the axial direction relative to the main frame 1. The locking pin 15 is fixed with an anti-detachment member for preventing the locking pin 15 from detaching from the main frame 1 and limiting the moving stroke of the locking pin 15. A spring is fixed on the locking pin 15, and both ends of the spring are respectively connected to the anti The stripper abuts against the main frame 1 and applies an extrusion force to the locking pin 15 in the direction of the supporting groove. An opening matched with the locking pin 15 is provided on the cross bar of the support rod 6. One end of the locking pin 15 inserted into the cross bar is set as an arc surface. During the process of placing the cross bar into the supporting groove, the cross bar squeezes the end of the locking pin 15 to make the locking pin 15 slide. At this time, the spring is compressed and contracts. When the cross bar and the locking pin 15 move relatively to the opening position, the locking pin 15 is inserted into the opening of the cross bar under the compression of the spring, so that the cross bar is locked and fixed on the support block 8. When folding the wheelchair, the locking pin 15 can be pulled out from the cross bar to achieve the separation of the cross bar and the support block 8.
[0045] See also Figure 1 and Figure 6 , and also includes a second limiting member 7 for limiting the maximum angle between the backrest 4 and the main frame 1. The second limiting member 7 is configured as a second limiting pin, and the second limiting pin is bolted to the backrest 4. A second sliding groove 13 for quantitative sliding of the second limiting pin is provided on the main frame 1. The length of the second sliding groove 13 is the moving range of the second limiting pin, thereby limiting the maximum angle of the backrest 4 opened compared to the main frame 1, thereby providing support for the back of the human body when the backrest 4 is fixed.
[0046] See also Figure 3 and Figure 4 , also includes a lock hook 14 and a lock pin 15 for locking the backrest 4 and the seat cushion 5, the hook lock is rotatably connected to the backrest 4 through a rotating shaft, and a rotating member 17 is also rotatably connected to the backrest 4, the rotating member 17 and the hook lock are fixed by a connecting rod 18, and the rotating member 17 and the lock hook 14 rotate synchronously around the same axis, and the rotating member 17 and the seat cushion 5 are linked by a linkage pin 16, so that when the seat cushion 5 rotates relative to the backrest 4, the linkage pin 16 drives the rotating member 17 to rotate and then drives the hook lock to rotate, and the lock pin 15 is fixed to the bracket 23 of the seat cushion 5 by screws, and when the seat cushion 5 rotates to fall toward the main frame 1, the lock pin 15 is disengaged from the lock hook 14, and when the backrest 4 is opened relative to the seat cushion 5, the lock hook 14 is buckled with the lock pin 15.
[0047] See also Figure 2 , including an auxiliary wheel group for contacting the ground instead of the wheels after the vehicle is folded, the auxiliary wheel group includes a first auxiliary wheel 19 installed on the tail frame 2 and a second auxiliary wheel 20 installed on the bracket 23 of the seat cushion 5, the first auxiliary wheel 19 is connected to the tail frame 2 through an auxiliary bracket 22, the first auxiliary wheel 19 is higher than the driving wheel 11 and does not contact the ground when the wheelchair is unfolded and used; the second auxiliary wheel 20 is connected to the seat cushion 5 through an extension bracket 21, the extension bracket 21 is welded and fixed on the bracket 23 of the seat cushion 5 and is located on the rear side of the seat cushion 5, the extension bracket 21 is bent downward from the connection with the seat cushion 5 to the end, and when the seat cushion 5 is bent and tilted toward the main frame 1, the extension bracket 21 is tilted, and after the wheelchair rotates, the first auxiliary wheel 19 and the second auxiliary wheel 20 contact the ground, which is convenient for transferring the folded wheelchair.
[0048] See also Figure 1 and Figure 2 It also includes an armrest 24 and a pedal 25 installed on the main frame 1, both of which are used to support the human body and improve comfort; it also includes a storage bag 26 hung on the backrest 4, which is used to store some items and enhance the functionality of the wheelchair when in use.
[0049] When the utility model is in use, the main frame 1 and the tail frame 2 are opened, the first limiting member 3 limits the maximum angle between the main frame 1 and the tail frame 2, and a stable triangular structure is formed between the main frame 1, the tail frame 2 and the ground to support the vehicle body, the end of the support rod 6 is fixed on the main frame 1, and the support frame, the seat and the main frame 1 form a stable triangular structure to support the human body, and the rotation angle of the backrest 4 is limited by the second limiting member 7. The backrest 4 supports the back when it is opened to the maximum angle compared with the seat. When folding, the end of the support rod 6 is separated from the main frame 1, and then the vehicle is lifted and tilted so that the main frame 1, the tail frame 2, the backrest 4 and the cushion 5 rotate and fit together due to their own gravity, thereby completing the folding and storage of the wheelchair.
[0050] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. All equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.
Claims
1. A foldable electric wheelchair, characterized in that: include: A main frame (1) and a tail frame (2) rotatably connected to the main frame (1), wherein wheels are mounted on the main frame (1) and the tail frame (2); A first limiting member (3) for limiting the maximum angle between the main frame (1) and the tail frame (2) in a use state; A seat mounted on the main frame (1), the seat comprising a backrest (4) and a seat cushion (5) respectively rotatably connected to the main frame (1), a support rod (6) being mounted on the seat cushion (5), and an end of the support rod (6) being detachably fixed to the main frame (1); and A second limiting member (7) is used for limiting the maximum angle between the backrest (4) and the main frame (1).
2. The foldable electric wheelchair according to claim 1, characterized in that: The end of the support rod (6) is rotatably connected to the seat cushion (5); a support block (8) is fixed to the main frame (1) for applying a supporting force to the support rod (6) so that the seat cushion (5) and the main frame (1) maintain an inclination angle in a use state; and a locking member (9) is also provided on the main frame (1) for locking and fixing the support rod (6) to the support block (8).
3. The foldable electric wheelchair according to claim 2, characterized in that: The locking member (9) is configured as a locking pin (15) which is slidably mounted on the main frame (1) and slides along the axial direction, and an opening which is matched with the locking pin (15) is provided on the support rod (6).
4. The foldable electric wheelchair according to claim 1, characterized in that: The wheels comprise a steering wheel (10) mounted on the main frame (1) and a driving wheel (11) mounted on the tail frame (2); a driving member (12) for driving the driving wheel (11) to rotate is provided on the tail frame (2).
5. The foldable electric wheelchair according to claim 1, characterized in that: The second limiting member (7) is configured as a second limiting pin, the second limiting pin is fixed to the backrest (4), and a second sliding groove (13) for the second limiting pin to slide quantitatively is provided on the main frame (1).
6. The foldable electric wheelchair according to claim 1, characterized in that: It also includes a locking hook (14) and a locking pin (15) for locking the backrest (4) and the seat cushion (5); when the seat cushion (5) rotates and falls toward the main frame (1), the locking pin (15) and the locking hook (14) are disengaged; when the backrest (4) is opened relative to the seat cushion (5), the locking hook (14) and the locking pin (15) are engaged.
7. The foldable electric wheelchair according to claim 6, characterized in that: The lock hook (14) is rotatably connected to the backrest (4), and the lock pin (15) is fixed to the seat cushion (5). The lock hook (14) and the seat cushion (5) are linked via a linkage pin (16). When the seat cushion (5) rotates, the lock hook (14) is driven to rotate, thereby causing the lock pin (15) to be disengaged from or engaged with the lock hook (14).
8. The foldable electric wheelchair according to claim 1, characterized in that: It also includes an armrest (24) and a pedal (25) mounted on the main frame (1), as well as a storage bag (26).
9. The foldable electric wheelchair according to any one of claims 1 to 8, characterized in that: Also included is an auxiliary wheel set for contacting the ground in place of the wheels after the vehicle is folded.
10. The foldable electric wheelchair according to claim 9, characterized in that: The auxiliary wheel set comprises a first auxiliary wheel (19) mounted on the rear frame (2) and a second auxiliary wheel (20) mounted on the seat cushion (5); the second auxiliary wheel (20) is connected to the seat cushion (5) via an extension bracket (21); the extension bracket (21) is located at the rear side of the seat cushion (5); after the wheelchair rotates, the first auxiliary wheel (19) and the second auxiliary wheel (20) contact the ground.