Folding electric wheelchair

Abstract

The utility model provides a folding electric wheelchair which comprises a locking assembly, a seat support and a backrest support, the seat support and the backrest support are in transmission connection, the locking assembly comprises a locking pin, a first locking groove, a second locking groove, an operation part and a locking spring, and the operation part is connected with the locking pin through a traction unit and movably arranged on the seat support. The first locking groove and the second locking groove are formed in the backrest support, the locking spring is suitable for driving the locking pin to be inserted into the first locking groove or the second locking groove, the locking pin extends into the first locking groove so that the folding electric wheelchair can be kept in an unfolded state, and the locking pin extends into the first locking groove so that the folding electric wheelchair can be kept in a folded state; the operating part is suitable for driving the locking pin to retreat from the first locking groove or the second locking groove through the traction unit so as to unlock. According to the folding electric wheelchair, the locking assembly is designed, so that convenient switching and stable locking of the folding electric wheelchair between the unfolding state and the folding state are achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of medical apparatus and instruments, especially relates to a folding electric wheelchair. BACKGROUND

[0002] In the existing electric wheelchair design, the user has higher and higher requirements for the portability and space occupation of the wheelchair, especially for the needs of the disabled or the elderly for travel, the electric wheelchair often needs to be stored in the trunk. The existing electric wheelchair may have problems such as complex operation and unstable locking during folding and unfolding, which not only brings inconvenience to the user, but also may affect the safety and reliability of the wheelchair. SUMMARY

[0003] In view of the defects of the prior art, the utility model aims at providing a folding electric wheelchair, which aims at solving the problems of inconvenient folding, difficult storage and unreliable locking mechanism of the traditional electric wheelchair.

[0004] To achieve the above-mentioned purpose, the utility model provides a folding electric wheelchair, which comprises a locking assembly, a seat support and a backrest support connected by transmission,

[0005] The locking assembly comprises a locking pin, a first locking groove, a second locking groove, an operating part and a locking spring, the operating part is connected with the locking pin through a traction unit,

[0006] The operating part is movably arranged on the seat support, and the first locking groove and the second locking groove are formed in the backrest support,

[0007] The locking spring is suitable for driving the locking pin to insert into the first locking groove or the second locking groove, the locking pin extends into the first locking groove to keep the folding electric wheelchair in an unfolded state, and the locking pin extends into the first locking groove to keep the folding electric wheelchair in a folded state.

[0008] The operating part is suitable for driving the locking pin to exit from the first locking groove or the second locking groove through the traction unit to release the locking.

[0009] As a preferred, the locking assembly comprises two locking pins arranged symmetrically and oppositely, the operating part is arranged in the middle of the two locking pins, and the operating part can be pressed, rotated or slid relative to the seat support.

[0010] As a preferred, the backrest support comprises a guide groove, the guide groove is arc-shaped, the guide groove is suitable for connecting the first locking groove and the second locking groove, and the locking pin slides in the guide groove during the switching process between the folded state and the unfolded state of the folding electric wheelchair.

[0011] As preferred: the locking assembly further comprises a spring housing, the spring housing is mounted on the seat support, the locking spring is contained in the spring housing, the spring housing comprises an open end and a closed end, the locking pin is adapted to connect an axial one end of the locking spring through the open end, an axial other end of the locking spring is connected to the closed end, the traction unit is adapted to pass through the locking spring and connect to the locking pin.

[0012] As preferred: the operating component comprises a handle, the traction unit is a linear steel cord, the seat support is relatively fixedly provided with a handle shell, the handle is telescopic relative to the handle shell, the handle is formed with a limiting slot for the linear steel cord to be clamped into; the locking pin is made of alloy material.

[0013] As preferred: the folding electric wheelchair comprises a first frame, a second frame, a first connecting rod adapted to connect the first frame and the second frame, and a second connecting rod adapted to connect the first frame and the seat support, the first frame and the second frame are respectively pivotally connected to the back support, the first frame, the first connecting rod, the second frame and the back support are adapted to constitute a first connecting rod mechanism which is linkable, the first frame, the second connecting rod, the seat support and the back support are adapted to constitute a second connecting rod mechanism which is linkable, the locking assembly limits the relative movement between the seat support and the back support so that the folding electric wheelchair is kept in a folded state or an unfolded state.

[0014] As preferred: the first frame comprises two first longitudinal beams arranged in parallel and a first cross beam adapted to connect the two first longitudinal beams, the second frame comprises two second longitudinal beams arranged in parallel, the first longitudinal beams and the second longitudinal beams are respectively pivotally connected to the back support, the first longitudinal beams and the second longitudinal beams are connected through the first connecting rod, the seat support comprises two third longitudinal beams arranged in parallel, the third longitudinal beams are connected to the first cross beam through the second connecting rod.

[0015] As preferred: the first connecting rod comprises a main body segment and at least one extension segment extending obliquely downward from one end of the main body segment, the two ends of the main body segment are respectively pivotally connected to the first longitudinal beam and the second longitudinal beam, the extension segment is mounted with an auxiliary wheel, in the folded state, the auxiliary wheel touches the ground to provide partial support for the folding electric wheelchair.

[0016] As preferred: the folding electric wheelchair comprises a driving assembly, the driving assembly comprises a motor, a battery pack adapted to supply power to the motor, a set of front wheels and a set of rear wheels.

[0017] The rear wheel is mounted on the second longitudinal beam, the motor is adapted to drive the rear wheel to rotate to provide driving force for the folding electric wheelchair, the battery pack is mounted between the two second longitudinal beams, and the driving device further comprises an anti-tilt wheel connected to the rear wheel.

[0018] One end of the first longitudinal beam is formed with a bearing seat, a steering shaft is mounted in the bearing seat, the front wheel is connected to the first longitudinal beam through a universal joint of a fork, the fork comprises a fork body and a connecting piece, the front wheel is mounted on the fork body, the connecting piece is pivotally connected to the upper end of the fork body, the fork body comprises a first platform, the connecting piece comprises a second platform, an elastic body is abutted between the first platform and the second platform, the first platform is formed with a movable slot, and the steering shaft extends into the movable slot through the second platform and the elastic body.

[0019] In the unfolded state, the fork body is arranged obliquely, the first platform is parallel to the second platform, and the steering shaft is arranged along the direction of gravity; in the folded state, the fork body is arranged along the direction of gravity, the connecting piece and the first longitudinal beam are turned downward, and the steering shaft moves in the movable slot.

[0020] The front wheel is flexible in steering, and can also reduce vibration during driving and improve riding comfort. The rear wheel is mainly responsible for providing power and stability, and the front wheel group is responsible for providing flexibility and maneuverability in steering. The cooperative work of the two makes the electric wheelchair safe and effective.

[0021] As preferred, the folding electric wheelchair comprises a pivot module integrated as a whole, the pivot module comprises a first active joint adapted to extend the backrest support, a first driven joint adapted to extend the first longitudinal beam, and a second driven joint adapted to extend the second longitudinal beam,

[0022] The first active joint comprises an inner surface and an outer surface perpendicular to the rotation direction of the first active joint, the first driven joint and the second driven joint are pivotally connected to the outer surface, the first locking groove, the second locking groove and the guide groove are formed in the inner surface, and the seat support is pivotally connected to the inner surface.

[0023] As preferred, the first active joint comprises a first stop plane and a first stop arc surface, the second driven joint comprises a second stop plane and a second stop arc surface, in the unfolded state, the first stop plane abuts against the second stop plane, and the first stop arc surface and the second stop arc surface jointly support the first driven joint.

[0024] As preferred: the folding electric wheelchair further comprises an armrest assembly and a footboard, the armrest assembly comprises two armrests respectively pivoted to the first master joint, one of the armrests is provided with a controller, the controller is adapted to control the start and stop of the motor, and the footboard is pivoted to the first frame.

[0025] The folding electric wheelchair has the advantages that:

[0026] (1) The operation part in the locking assembly is connected with the locking pin through the traction unit, the operation part can conveniently drive the locking pin to exit the locking slot, thereby releasing the locking, allowing the backrest support and the seat support to relatively move, and completing the folding or unfolding action. (2) The locking spring can stably drive the locking pin to insert into the first locking slot or the second locking slot, ensuring that the folding electric wheelchair remains stable in the unfolded state or the folded state, effectively avoiding structural loosening or state change caused by accidental collision or vibration during use, and improving the safety and reliability of the wheelchair

[0027] Moreover, the arc-shaped guide slot arranged on the backrest support allows the locking pin to smoothly slide in the guide slot during folding and unfolding, reducing the operation difficulty, optimizing the operation fluency, and improving the stability of the structure.

[0028] (2) The first connecting rod mechanism and the second connecting rod mechanism are adopted, the first frame, the second frame, the backrest support and the seat support form a linkage relationship, the components can cooperatively move during folding, and the overall size is effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0029] Fig. 1 is a structural schematic view of a folding electric wheelchair provided by the utility model.

[0030] Fig. 2 is a side view of a folding electric wheelchair provided by the utility model.

[0031] Fig. 3 is a perspective view of a folding electric wheelchair provided by the utility model.

[0032] Fig. 4 is an enlarged schematic view of the A area of Figure 3 .

[0033] Fig. 5 is a connection schematic view of a seat support and a backrest support provided by the utility model.

[0034] Fig. 6 is a structural schematic view of a locking assembly provided by the utility model.

[0035] Fig. 7 is a structural schematic view of a pivot module provided by the present application.

[0036] In the figure, the first longitudinal beam 101, the second longitudinal beam 102, the first cross beam 103, the second cross beam 104, the first connecting rod 105, the second connecting rod 106, the seat support 107, the back support 108, the bearing seat 109, the steering shaft 110, the seat cross beam 111, the seat longitudinal beam 112, the armrest 113, the footboard 114, the main body section 115, the extension section 116, the first active joint 117, the first driven joint 118, the second driven joint 119, the first stop plane 120, the first stop curved surface 121, the second stop plane 122, the second stop curved surface 123, the locking pin 201, the first locking groove 202, the second locking groove 203, the guide groove 204, the spring compartment 205, the traction unit 206, the handle shell 207, the handle 208, the motor 301, the battery pack 302, the front wheel 303, the rear wheel 304, the anti-tip wheel 305, the fork body 306, the connecting piece 307, the first platform 308, the second platform 309, the elastic body 310, the movable groove 311. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be described in detail below with reference to the drawings and specific embodiments.

[0038] Here, it also needs to be explained that, in order to avoid the present application being obscured by unnecessary details, only the structures and / or processing steps closely related to the scheme of the present application are shown in the drawings, and other details not closely related to the present application are omitted.

[0039] In addition, it also needs to be explained that the term "comprise", "include" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or equipment.

[0040] As Figures 1-7The folding electric wheelchair comprises a first frame, a second frame, a seat support 107, a back support 108, a first connecting rod 105 adapted to connect the first frame and the second frame, a second connecting rod 106 adapted to connect the first frame and the seat support 107, a driving assembly, a locking assembly and an integrated pivot module. The first frame comprises two first longitudinal beams 101 arranged in parallel and a first cross beam 103 adapted to connect the two first longitudinal beams 101, and the second frame comprises two second longitudinal beams 102 arranged in parallel. The first longitudinal beams 101 and the second longitudinal beams 102 are connected by the first connecting rod 105, and the seat support 107 comprises two third longitudinal beams arranged in parallel and connected to the first cross beam 103 by the second connecting rod 106. The pivot module comprises a first active joint 117 adapted to extend the back support 108, a first passive joint 118 adapted to extend the first longitudinal beam 101 and a second passive joint 119 adapted to extend the second longitudinal beam 102. The first active joint 117 comprises an inner surface and an outer surface perpendicular to the rotation direction of the first active joint 117, the first passive joint 118 and the second passive joint 119 are respectively pivoted to the outer surface, and the seat support 107 is pivoted to the inner surface. The first frame, the first connecting rod 105, the second frame and the back support 108 are adapted to form a first connecting rod 105 linkage, the first frame, the second connecting rod 106, the seat support 107 and the back support 108 are adapted to form a second connecting rod 106 linkage, and the locking assembly limits the relative movement between the seat support 107 and the back support 108 to keep the folding electric wheelchair in the folded state or the unfolded state.

[0041] The locking assembly comprises two locking pins 201 arranged symmetrically and oppositely, two first locking grooves 202, two second locking grooves 203, an operating part and two locking springs. The operating part connects the locking pins 201 through a traction unit 206, the operating part is arranged in the middle of the two locking pins 201, the operating part is movably mounted on the seat support 107, the first locking grooves 202 and the second locking grooves 203 are formed on the inner surface of the first active joint 117, and the locking springs are adapted to drive the locking pins 201 to insert into the first locking grooves 202 or the second locking grooves 203. Specifically, the locking pins 201 extend into the first locking grooves 202 to keep the folding electric wheelchair in the unfolded state, and the locking pins 201 extend into the first locking grooves 202 to keep the folding electric wheelchair in the folded state. The operating part is adapted to drive the locking pins 201 to exit the first locking grooves 202 or the second locking grooves 203 through the traction unit 206 to release the locking.

[0042] In the embodiment, the first active joint 117 comprises a first stop plane 120 and a first stop arc surface 121, and the second passive joint 119 comprises a second stop plane 122 and a second stop arc surface 123. In the unfolded state, the first stop plane 120 abuts against the second stop plane 122, and the first stop arc surface 121 and the second stop arc surface 123 jointly support the first passive joint 118.

[0043] In the embodiment, the seat support 107 comprises a seat crossbeam 111 and seat longitudinal beams 112 arranged at both ends of the seat crossbeam 111, the seat longitudinal beams 112 are pivotally connected to the first active joint 117. The seat crossbeam 111 is provided with a handle shell 207, the operating component comprises a handle 208, the traction unit 206 is a linear steel cord, the handle 208 is formed with a limiting slot for clamping the linear steel cord, the handle 208 is telescopically movable relative to the handle shell 207 in a direction perpendicular to the extension direction of the traction unit 206. The locking pin 201 is made of alloy material. The seat crossbeam 111 is provided with a spring bin 205 adjacent to the seat longitudinal beam 112, the locking spring is accommodated in the spring bin 205, the spring bin 205 comprises an open end and a closed end, the locking pin 201 is adapted to connect an axial end of the locking spring through the open end, the axial other end of the locking spring is connected to the closed end, and the traction unit 206 is adapted to pass through the locking spring and be connected to the locking pin 201.

[0044] In the embodiment, the inner surface of the first active joint 117 is formed with a guide slot 204 adapted to connect the first locking slot 202 and the second locking slot 203, the guide slot 204 is arc-shaped, and the locking pin 201 slides in the guide slot 204 during the switching process between the folded state and the unfolded state of the folding electric wheelchair.

[0045] In the embodiment, the driving assembly comprises a motor 301, a battery pack 302 adapted to supply power to the motor 301, a set of front wheels 303 and a set of rear wheels 304. The rear wheels 304 are mounted on the second longitudinal beams 102, the motor 301 is adapted to drive the rear wheels 304 to rotate to provide driving force for the folding electric wheelchair, the battery pack 302 is mounted between the two second longitudinal beams 102, and the driving device further comprises an anti-roll wheel 305 connected to the rear wheels 304. One end of the first longitudinal beam 101 is formed with a bearing seat 109, the inside of the bearing seat 109 is mounted with a steering shaft 110, the front wheels 303 are connected to the first longitudinal beam 101 through a wishbone universal joint, the wishbone universal joint comprises a wishbone body 306 and a connecting piece 307, the front wheels 303 are mounted on the wishbone body 306, the connecting piece 307 is pivotally connected to the upper end of the wishbone body 306, the wishbone body 306 comprises a first platform 308, the connecting piece 307 comprises a second platform 309, and an elastic body 310 is abutted between the first platform 308 and the second platform 309, the first platform 308 is formed with a movable slot 311, and the steering shaft 110 extends into the movable slot 311 after passing through the second platform 309 and the elastic body 310.

[0046] In the unfolded state, the fork body 306 is arranged obliquely, the first platform 308 is parallel to the second platform 309, and the steering shaft 110 is arranged along the direction of gravity; in the folded state, the fork body 306 is arranged along the direction of gravity, the connecting piece 307 and the first longitudinal beam 101 are turned down, and the steering shaft 110 moves in the movable slot 311. The front wheel 303 is flexible in steering, and at the same time, the vibration during driving can be reduced, and the riding comfort is improved; the rear wheel 304 is mainly responsible for providing power and stability, while the front wheel 303 group is responsible for providing flexibility and maneuverability in steering, and the cooperative work of the two makes the electric wheelchair safe and effective.

[0047] In the embodiment, the folding electric wheelchair further comprises an armrest assembly and a footboard 114, the armrest assembly comprises two armrests 113 respectively pivotally connected to the first master joint 117, one of the armrests 113 is provided with a controller, and the controller is suitable for controlling the start and stop of the motor 301. The first frame further comprises a second cross beam 104 suitable for connecting the two bearing seats 109, and the footboard 114 is pivotally connected to the second cross beam 104.

[0048] In the embodiment, the first connecting rod 105 comprises a main body section 115 and an extension section 116 obliquely extending downward from one end of the main body section 115, both ends of the main body section 115 are pivotally connected to the first longitudinal beam 101 and the second longitudinal beam 102 respectively, and the extension section 116 is provided with an auxiliary wheel. In the folded state, the auxiliary wheel touches the ground to provide partial support for the folding electric wheelchair.

[0049] The above embodiments are only used to illustrate the technical solutions of the utility model and not to limit, although the utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the utility model can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the utility model.

Claims

1. A foldable electrically powered wheelchair, characterized in that, The seat support and the back support are connected by a transmission, The locking assembly comprises a locking pin, a first locking slot, a second locking slot, an operating part and a locking spring, the operating part is connected with the locking pin through a traction unit, The operating part is movably arranged on the seat support, the first locking slot and the second locking slot are formed on the back support, The locking spring is adapted to drive the locking pin to insert into the first locking slot or the second locking slot, the locking pin extends into the first locking slot to keep the folding electric wheelchair in an unfolded state, the locking pin extends into the second locking slot to keep the folding electric wheelchair in a folded state; The operating part is adapted to drive the locking pin to exit from the first locking slot or the second locking slot through the traction unit to release the locking.

2. The folding electric wheelchair according to claim 1, wherein The locking assembly comprises two locking pins arranged symmetrically and oppositely, the operating part is arranged at the middle of the two locking pins, the operating part can be pressed, rotated or slid relative to the seat support.

3. The foldable electric wheelchair according to claim 2, wherein, The back support comprises a guide slot, the guide slot is arc-shaped, the guide slot is adapted to connect the first locking slot and the second locking slot, the locking pin slides in the guide slot during the switching process between the folded state and the unfolded state of the folding electric wheelchair.

4. The foldable electric wheelchair according to claim 3, wherein, The locking assembly further comprises a spring bin, the spring bin is mounted on the seat support, the locking spring is accommodated in the spring bin, the spring bin comprises an open end and a closed end, the locking pin is adapted to connect an axial one end of the locking spring through the open end, an axial other end of the locking spring is connected to the closed end, the traction unit is adapted to pass through the locking spring and is connected to the locking pin.

5. The foldable electric wheelchair according to claim 4, wherein, The first frame, the second frame, the first connecting rod adapted to connect the first frame and the second frame and the second connecting rod adapted to connect the first frame and the seat support, the first frame and the second frame are respectively pivoted to the back support, the first frame, the first connecting rod, the second frame and the back support are adapted to constitute a linkable first connecting rod mechanism, the first frame, the second connecting rod, the seat support and the back support are adapted to constitute a linkable second connecting rod mechanism, the locking assembly keeps the folding electric wheelchair in the folded state or the unfolded state by limiting the relative movement between the seat support and the back support.

6. The foldable electric wheelchair according to claim 5, wherein, The first frame comprises two parallel first longitudinal beams and a first cross beam adapted to connect the two first longitudinal beams, the second frame comprises two parallel second longitudinal beams, the first longitudinal beam and the second longitudinal beam are respectively pivoted to the back support, the first longitudinal beam and the second longitudinal beam are connected through the first connecting rod, the seat support comprises two parallel third longitudinal beams, the third longitudinal beam is connected to the first cross beam through the second connecting rod.

7. The foldable electric wheelchair according to claim 6, wherein The driving assembly comprises a motor, a battery pack adapted to supply energy for the motor, a set of front wheels and a set of rear wheels, The rear wheels are mounted on the second longitudinal beams, the motor is adapted to drive the rear wheels to rotate to provide driving force for the folding electric wheelchair, and the battery pack is mounted between the two second longitudinal beams; One end of the first longitudinal beam is formed with a bearing seat, a steering shaft is mounted in the bearing seat, the front wheels are connected to the first longitudinal beam through a universal joint of a fork, the fork includes a fork body and a connecting piece, the front wheels are mounted on the fork body, the connecting piece is pivotally connected to the upper end of the fork body, the fork body includes a first platform, the connecting piece includes a second platform, an elastic body is abutted between the first platform and the second platform, the first platform is formed with a movable slot, the steering shaft extends into the movable slot through the second platform and the elastic body, In the unfolded state, the fork body is arranged obliquely, the first platform is parallel to the second platform, and the steering shaft is arranged along the direction of gravity; in the folded state, the fork body is arranged along the direction of gravity, the connecting piece and the first longitudinal beam are turned over downward, and the steering shaft moves in the movable slot.

8. The foldable electric wheelchair according to claim 6, wherein, The first active joint is adapted to extend the backrest support, the first driven joint is adapted to extend the first longitudinal beam, and the second driven joint is adapted to extend the second longitudinal beam. The first active joint includes an inner surface and an outer surface perpendicular to the rotation direction of the first active joint, the first driven joint and the second driven joint are pivotally connected to the outer surface, the first locking groove, the second locking groove and the guide groove are formed in the inner surface, and the seat support is pivotally connected to the inner surface.

9. The foldable electric wheelchair according to claim 8, wherein, The first active joint includes a first stop plane and a first stop arc surface, the second driven joint includes a second stop plane and a second stop arc surface, in the unfolded state, the first stop plane abuts against the second stop plane, and the first stop arc surface and the second stop arc surface jointly support the first driven joint.

10. The foldable electric wheelchair according to claim 9, wherein, The folding electric wheelchair further includes an armrest assembly and a foot pedal, the armrest assembly includes two armrests pivotally connected to the first active joint, one of the armrests is provided with a controller adapted to control the start and stop of the motor, and the foot pedal is pivotally connected to the first frame.

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