Foldable electric wheelchair

Abstract

The utility model discloses a foldable electric wheelchair which comprises a seat frame, a back frame and main beams arranged on the two sides of the wheelchair, the back frame is movably connected with the seat frame, armrests are further hinged to the back frame, the top ends of the two main beams are hinged to the two sides of the seat frame respectively, the free ends of the main beams are connected with rear driving wheels, and the rear driving wheels are connected with the rear driving wheels. A front auxiliary beam is connected to the inner side of the main beam, a folding supporting assembly is connected among the front auxiliary beam, the main beam and the bottom wall of the seat frame to limit the using posture of the wheelchair, the front auxiliary beam is movably connected with the back frame, and front wheelchair wheels and a pedal set are connected to the end of the front auxiliary beam. Compared with the prior art, the foldable electric wheelchair has the advantages that a novel mechanical folding structure is provided, and the foldable electric wheelchair can be operated and used in a time-saving and labor-saving mode.

Description

Technical Field

[0001] The utility model relates to the field of folding technical structures of electric wheelchairs, in particular to a foldable electric wheelchair. Background Art

[0002] As society progresses, the concept of humanitarian care is increasingly enhanced. In order to solve the mobility problems of the disabled or the elderly, women and children, an electric wheelchair has been developed on the market to provide a ride to replace the body. Although it cannot completely replace the body, it has alleviated the problem of mobility problems.

[0003] Electric wheelchairs in the prior art are generally foldable for easy storage and transportation. In the prior art, some electric wheelchairs are folded by electric drive for extreme convenience. If there is a problem with the electric structure or a failure occurs during use, it may easily lead to difficulty in folding. At the same time, the electric folding structure may cause power anxiety and affect the user experience. The mechanical structure of some manual folding wheelchairs is too complicated and requires multiple steps to complete the folding assembly, which makes it inconvenient to use. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the above technical defects and provide a new type of mechanical folding structure, which can save time and effort to operate and use a foldable electric wheelchair.

[0005] In order to solve the above technical problems, the technical solution provided by the utility model is: a foldable electric wheelchair, comprising a seat frame, a back frame and main beams arranged on both sides of the wheelchair, the back frame is movably connected to the seat frame, and the back frame is also hinged with armrests, the top ends of the two main beams are respectively hinged to the two sides of the seat frame, the free ends of the main beams are connected to rear driving wheels, the inner sides of the main beams are connected to front auxiliary beams, a folding support assembly is connected between the front auxiliary beam, the main beam and the bottom wall of the seat frame to limit the wheelchair usage posture, the front auxiliary beam is movably connected to the back frame, and the ends of the front auxiliary beam are connected to front wheelchair wheels and a pedal group.

[0006] Preferably, a hinge plate is provided on the back frame near the seat frame, the hinge plate is hinged to the outer wall of the seat frame, the armrest is provided with two groups respectively connected to the left and right sides of the back frame, an electric controller is fixedly connected to the armrest on either side, an armrest folding box is hingedly provided at the bottom end of the armrest near the back frame, a connecting rod is hingedly provided in the end of the armrest folding box, and the free end of the connecting rod is hinged to the outer wall of the hinge plate.

[0007] Preferably, a clamping rod is provided at one end of the electric controller, a clamping tube is provided on any handrail, the clamping rod and the clamping tube are slidably sleeved, and the handrail folding box is fixed to the handrail by a buckle.

[0008] Preferably, a linkage rod is provided between the front auxiliary beam and the lower end of the back frame, and both ends of the linkage rod are hinged to the front auxiliary beam and the back frame respectively.

[0009] Preferably, the folding support assembly includes a limit hook, a seat frame vertical plate and an auxiliary beam vertical plate, the seat frame vertical plate and the ends of the auxiliary beam vertical plate are hinged, the top of the seat frame vertical plate is hinged to the inner wall of the seat frame, the auxiliary beam vertical plate is fixedly connected to the front auxiliary beam near the linkage rod, the vertical section of the limit hook is L-shaped, the two side walls of the limit hook are respectively hinged to the inner walls of the two main beams, the side wall of the lower end of the limit hook is concave with a limit groove, the front auxiliary beam is provided with a through hole corresponding to the position of the limit groove, a limit rod is penetrated in the through hole, the limit groove on the limit hook cooperates with the through hole on the front auxiliary beam to insert the limit rod, etc. for secondary fixation, in order to ensure the stability of the structure during use.

[0010] Preferably, a reinforcing cross beam 1 is connected between the inner side walls of the limiting hook.

[0011] Preferably, ends of the two front auxiliary beams away from the back frame are both connected with axles, and the front wheelchair wheels are movably connected to the axles.

[0012] Preferably, the pedal group includes a second reinforcing beam, a pedal frame and a connecting plate. The second reinforcing beam is connected between the two front auxiliary beams. The connecting plate is connected to the middle of the second reinforcing beam and is inclined downward. A connecting plate is fixed on the pedal frame toward the connecting plate. The connecting plate is hinged to the connecting plate. The lower end of the connecting plate extends to the lower part of the pedal frame and is disposed against the side wall of the pedal frame.

[0013] Preferably, a connecting block is connected to the free end of the main beam, the outer side wall of the connecting block is connected to the rear drive wheel, the connecting block is also provided with a drive motor matching the rear drive wheel, an anti-roll bar is extended from the end of the connecting block, and an auxiliary wheel is connected to the end of the anti-roll bar.

[0014] The advantages of the utility model compared with the prior art are:

[0015] In the present invention, the main structures such as the seat frame, back frame, main beam, front auxiliary beam, etc. are all hinged, which is convenient for the folding and coordination of various structural components. In order to facilitate the folding operation in a time-saving and labor-saving manner, the present invention adopts a folding support assembly composed of limit hooks, seat frame vertical plates and auxiliary beam vertical plates to limit the use posture of the wheelchair. The wheelchair can be quickly folded through various hinged structures by changing the posture of the front auxiliary beam, which is convenient for users to operate. At the same time, the coordinated setting of the armrest folding box and other structures in the present invention can also quickly adjust the use posture of the armrest to complete the overall folding and use of the wheelchair. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a structural schematic diagram of a foldable electric wheelchair.

[0017] Figure 2 It is a schematic diagram of the structure of the utility model when the patent name is used.

[0018] Figure 3 The present invention is a structural schematic diagram of a front view of a foldable electric wheelchair.

[0019] Figure 4 The present invention is a structural schematic diagram of a cross-section diagram of a foldable electric wheelchair.

[0020] As shown in the figure: 1. seat frame, 2. back frame, 3. main beam, 4. armrest, 5. rear drive wheel, 6. front auxiliary beam, 7. front wheelchair wheel, 8. hinge plate, 9. electric controller, 10. armrest folding box, 11. connecting rod, 12. clamping rod, 13. clamping tube, 14. linkage rod, 15. limit hook, 16. seat frame vertical plate, 17. auxiliary beam vertical plate, 19. through hole, 20. reinforcement beam one, 21. wheel axle, 22. reinforcement beam two, 23. pedal frame, 24. connecting plate, 25. connecting block, 26. drive motor, 27. anti-roll bar, 28. auxiliary wheel, 29. limit rod. DETAILED DESCRIPTION

[0021] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0022] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0023] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0024] Combined with Figure 1-4As shown, a foldable electric wheelchair comprises a seat frame 1, a back frame 2 and main beams 3 arranged on both sides of the wheelchair, the back frame 2 is movably connected to the seat frame 1, and handrails 4 are hinged on the back frame 2. The top ends of the two main beams 3 are respectively hinged to the two sides of the seat frame 1, and the free ends of the main beams 3 are connected with rear driving wheels 5. The inner side of the main beam 3 is connected with a front auxiliary beam 6, and a folding support assembly is connected between the front auxiliary beam 6, the main beam 3 and the bottom wall of the seat frame 1 to limit the use posture of the wheelchair, the front auxiliary beam 6 is movably connected to the back frame 2, and the end of the front auxiliary beam 6 is connected with a front wheelchair wheel 7 and a pedal group, and the front auxiliary beam 6 is away from the back frame 2. The ends of the frame 2 are connected with a wheel axle 21, and the front wheelchair wheel 7 is movably connected to the wheel axle 21. The pedal group includes a reinforced cross beam 22, a pedal frame 23 and a connecting plate 24. The reinforced cross beam 22 is connected between the two front auxiliary cross beams. The connecting plate 24 is connected to the middle of the reinforced cross beam 22 and is tilted downward. A connecting piece is fixed on the pedal frame 23 toward the connecting plate 24. The connecting piece is hinged to the connecting plate 24. The lower end of the connecting plate 24 extends to the lower part of the pedal frame 23 and is against the side wall of the pedal frame 23. During normal use, the connecting plate 24 is limited to control the position of the pedal frame 23.

[0025] In order to facilitate the coordinated use of the back frame 2 and the seat frame 1, a hinged piece 8 is provided on the back frame 2 near the seat frame 1, and the hinged piece 8 is hingedly arranged with the outer wall of the seat frame 1. At the same time, when in use, an electric controller 9 is fixedly connected to the armrests 4 on either side, and the rear driving wheel 5 is controlled by the electric controller 9. In order to increase the stability of the use of the foldable armrest 4, an armrest folding box 10 is hingedly arranged near the back frame 2 at the bottom end of the armrest 4, and a connecting rod 11 is hingedly arranged in the end of the armrest folding box 10, and the free end of the connecting rod 11 is hingedly arranged with the outer wall of the hinged piece 8, and the armrest folding box 10 is fixed to the armrest 4 by a buckle. When in a fixed posture, the armrest folding box 10 supports the armrest, and the connecting rod 11 is in a fixed posture and cannot move. When folded for use, the buckle is opened so that the armrest folding box 10 and the connecting rod 11 are relatively hinged to complete the folding of the armrest. For better folding use, a linkage rod 14 is provided between the front auxiliary beam 6 and the lower end of the back frame 2. The two ends of the linkage rod 14 are respectively hinged to the front auxiliary beam 6 and the back frame 2. Therefore, when folded for use, the front auxiliary beam 6 and the back frame 2 can respectively rotate around the hinged ends with the linkage rod 14 to complete the folding of the front auxiliary beam 6 and the back frame 2.

[0026] During specific use, the folding support assembly includes a limit hook 15, a seat frame vertical plate 16 and an auxiliary beam vertical plate 17. The seat frame vertical plate 16 and the ends of the auxiliary beam vertical plate 17 are hinged, the top of the seat frame vertical plate 16 is hinged to the inner wall of the seat frame 1, and the auxiliary beam vertical plate 17 is fixedly connected to the front auxiliary beam 6 near the linkage rod 14. The vertical section of the limit hook 15 is L-shaped, and the two side walls of the limit hook 15 are respectively hinged to the inner walls of the two main beams 3. A limit groove is recessed in the side wall of the lower end of the limit hook 15. Through holes 19 are provided on the two front auxiliary beams 6 on both sides corresponding to the position of the limit groove. A limit rod 29 is penetrated in the through hole 19. There are threaded holes at both ends of the limit rod 29, and the limit rod 29 is fixed to the front auxiliary beam 6 by two screws. The L-shaped setting of the limit hook 15 can provide auxiliary support for the seat frame 1 when in use. At the same time, the limit groove on the limit hook 15 cooperates with the through hole 19 on the front auxiliary beam 6 to insert the limit rod 29 for secondary fixation. In order to ensure the stability of the structure during use, a reinforcing beam 20 is connected between the two side walls inside the limit hook 15 to reinforce the structure.

[0027] In another embodiment, the limiting rod 29 may also be replaced by two spring pull pins separately provided on the two front auxiliary beams 6 .

[0028] In one of the embodiments, a clamping rod 12 is provided at one end of the electric controller 9, and a clamping tube 13 is provided on any handrail 4. The clamping rod 12 is clamped by the clamping tube 13 to complete the positioning. A connecting block 25 is connected to the free end of the main beam 3, and the outer wall of the connecting block 25 is connected to the rear drive wheel 5. The connecting block 25 is also provided with a driving motor 26 to match the rear drive wheel 5. An anti-roll bar 27 is extended from the end of the connecting block 25, and an auxiliary wheel 28 is connected to the end of the anti-roll bar 27. The anti-roll bar 27 cooperates with the auxiliary wheel 28, and after folding, it can cooperate with the rear drive wheel 5 for auxiliary support to ensure the stability of the wheelchair.

[0029] When the utility model is implemented, in order to lock the wheelchair, it is only necessary to buckle the upper parallel rod of the upper limit hook 15 whose vertical section is L-shaped, so that the limit groove of the limit hook 15 can be disengaged from the limit rod 29, and all structures of the wheelchair are in an unlocked state. Under the influence of gravity and manpower, the front auxiliary beam is bent around the hinge point with the main beam, and the front wheelchair wheel is close to the rear driving wheel. At the same time, the back frame is hinged and rotated around the hinge point with the linkage rod. Before this, the buckle needs to be opened so that the armrest can be folded. When the back frame is hinged, the hinged movement around the seat frame occurs through the linked hinge structure, thereby completing the folding of the wheelchair. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0030] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A foldable electric wheelchair, characterized in that: The wheelchair comprises a seat frame (1), a back frame (2) and main beams (3) arranged on both sides of the wheelchair, the back frame (2) is movably connected to the seat frame (1), and the back frame (2) is also hingedly provided with handrails (4), the top ends of the two main beams (3) are respectively hingedly provided with the two sides of the seat frame (1), the free ends of the main beams (3) are connected with rear drive wheels (5), the inner side of the main beam (3) is connected with a front auxiliary beam (6), and a folding support assembly is connected between the front auxiliary beam (6), the main beam (3) and the bottom wall of the seat frame (1) to limit the use posture of the wheelchair, and the folding support assembly comprises a limit hook (15), a seat frame vertical plate (16) and an auxiliary beam vertical plate (17), and the seat frame vertical plate (16) is hingedly arranged with the end of the auxiliary beam vertical plate (17), the top of the seat frame vertical plate (16) is hingedly arranged with the inner side wall of the seat frame (1), the auxiliary beam vertical plate (17) is fixedly connected with the front auxiliary beam (6) near the linkage rod (14), the vertical section of the limit hook (15) is L-shaped, the two side walls of the limit hook (15) are respectively hingedly arranged with the inner side walls of the two main beams (3), a reinforcing cross beam (20) is connected between the two side walls inside the limit hook (15), a limit groove is concavely arranged in the side wall of the lower end of the limit hook (15), a through hole (19) is arranged on the front auxiliary beam (6) corresponding to the position of the limit groove, and a limit rod (29) is passed through the through hole (19); The front auxiliary beam (6) is movably connected to the back frame (2), and the end of the front auxiliary beam (6) is connected to a front wheelchair wheel (7).

2. A foldable electric wheelchair according to claim 1, characterized in that: The two ends of the limiting rod (29) are provided with threaded holes, and the limiting rod (29) is fixed on the front auxiliary beam (6) by two screws.

3. A foldable electric wheelchair according to claim 1, characterized in that: The limiting rod (29) can also be replaced by a spring pull pin.

4. The foldable electric wheelchair according to claim 1, characterized in that: The back frame (2) is provided with a hinged plate (8) near the seat frame (1), and the hinged plate (8) is hingedly arranged with the outer wall of the seat frame (1). The armrest (4) is provided with two groups respectively connected to the left and right sides of the back frame (2), and an electric controller (9) is fixedly connected to the armrest (4) on either side. The bottom end of the armrest (4) is hingedly provided with an armrest folding box (10) near the back frame (2), and a connecting rod (11) is hingedly arranged inside the end of the armrest folding box (10), and the free end of the connecting rod (11) is hingedly arranged with the outer wall of the hinged plate (8).

5. A foldable electric wheelchair according to claim 4, characterized in that: It also includes an electric controller (9), one end of which is provided with a clamping rod (12), and any handrail (4) is provided with a clamping tube (13), the clamping rod (12) and the clamping tube (13) are slidably sleeved, and the handrail folding box (10) is fixed to the handrail (4) by a buckle.

6. The foldable electric wheelchair according to claim 1, characterized in that: A linkage rod (14) is provided between the front auxiliary beam (6) and the lower end of the back frame (2), and the two ends of the linkage rod (14) are respectively hingedly connected to the front auxiliary beam (6) and the back frame (2).

7. The foldable electric wheelchair according to claim 1, characterized in that: The ends of the two front auxiliary beams (6) away from the back frame (2) are both connected with a wheel axle (21), and the front wheelchair wheels (7) are movably connected to the wheel axle (21).

8. A foldable electric wheelchair according to claim 7, characterized in that: A connecting block (25) is connected to the free end of the main beam (3); an outer side wall of the connecting block (25) is connected to a rear drive wheel (5); a driving motor (26) is matched with the rear drive wheel (5) on the connecting block (25); an anti-roll bar (27) is extended from the end of the connecting block (25); and an auxiliary wheel (28) is connected to the end of the anti-roll bar (27).

Images