Electric wheelchair

Abstract

The utility model discloses an electric wheelchair. The electric wheelchair comprises a front wheel and rear wheel assembly, a main supporting beam, a seat assembly and a lifting assembly. The main supporting beam is hinged to the front wheel and rear wheel assembly. The seat assembly is hinged to the main supporting beam. The lifting assemblies are hinged between the front wheel and rear wheel assemblies and the seat assembly, the lifting assemblies are used for driving the seat assembly to be lifted and folded, each lifting assembly comprises a first electric push rod and a second electric push rod, and the first electric push rods are hinged between the main supporting beam and the seat assembly; the second electric push rods are hinged between the front wheel and rear wheel assembly and the main supporting beam. When the electric wheelchair needs to be folded, the lifting assembly drives the main supporting beam to move, the height of the seat assembly is lowered, folding is completed, safety can be guaranteed, the front wheel assembly and the rear wheel assembly are not affected in the folding process, and use after folding is not affected.

Description

Technical Field

[0001] This application relates to the field of mobility technology, and in particular to an electric wheelchair. Background Technology

[0002] Most foldable wheelchairs in related technologies are manually foldable because any malfunction in the electric folding mechanism of most electrically foldable wheelchairs could potentially injure the occupant, making them inherently dangerous. Furthermore, most folding wheelchairs currently lack swivel wheels or adjustable seat height mechanisms. This is largely because swivel wheels require a perpendicular orientation to the ground, and adjusting the seat or folding the wheelchair can affect the frame, causing the wheels to become non-perpendicular. Once folded, if the wheels are not perpendicular, the wheelchair becomes unusable, potentially preventing proper four-wheel movement or causing instability on inclines and declines. Utility Model Content

[0003] The purpose of this application is to at least solve one of the technical problems existing in the prior art. To this end, this application proposes an electric wheelchair that can be folded by electric lifting, ensuring safety without affecting its use after folding.

[0004] The electric wheelchair according to the first aspect of this application includes:

[0005] Front and rear wheel assembly;

[0006] The main support beam is hinged to the front and rear wheel assemblies;

[0007] The seat assembly is hinged to the main support beam;

[0008] A lifting assembly is used to drive the seat assembly to lift, lower, and fold. The lifting assembly includes a first electric push rod and a second electric push rod. The first electric push rod is hinged between the main support beam and the seat assembly, and the second electric push rod is hinged between the front wheel and rear wheel assemblies and the main support beam.

[0009] The electric wheelchair according to the first aspect of the present application has at least the following beneficial effects: when the electric wheelchair needs to be folded, the main support beam is moved by the lifting component and the height of the seat component is lowered to complete the folding, thereby ensuring safety. Moreover, the front and rear wheel components are not affected during the folding process, but only the folding is achieved by lifting the seat component, so it does not affect the use after folding.

[0010] According to the first aspect of the present application, the electric wheelchair further includes a mounting platform, the seat assembly is disposed on the mounting platform, and the main support beam is hinged to the mounting platform so that the seat assembly is indirectly disposed on the main support beam.

[0011] According to the first aspect of the embodiment of the present application, the first electric push rod and the second electric push rod are arranged at intervals along the length direction of the front wheel and rear wheel assembly and form a linkage mechanism with the front wheel and rear wheel assembly and the mounting platform. The first electric push rod and the second electric push rod drive the seat assembly to rise and fall and adjust the angle by extension and retraction.

[0012] According to the electric wheelchair of the first aspect of this application, one end of the main support beam that is hinged to the front wheel and rear wheel assembly is disposed relatively close to one end of the first electric push rod that is hinged to the front wheel and rear wheel assembly, and the other end of the main support beam that is hinged to the mounting platform is disposed relatively close to one end of the second electric push rod that is hinged to the mounting platform.

[0013] According to the electric wheelchair of the first aspect of this application, the lifting assembly includes a control device and an angle sensor component. The angle sensor component is used to identify changes in the tilt angle of the seat assembly. The control device is used to receive information from the angle sensor component and control at least one of the first electric push rod or the second electric push rod to enable the seat assembly to be raised and lowered horizontally.

[0014] According to the first aspect of the embodiment of the present application, the electric wheelchair has a seat assembly that is detachably mounted on the mounting platform by means of a snap-fit.

[0015] According to the first aspect of the present application, the electric wheelchair includes a seat assembly comprising a backrest component and a seat component, wherein the backrest component is movably connected to the seat component so that the backrest component can be folded by pressing down in a direction relatively close to the seat component.

[0016] According to the first aspect of the present application, the electric wheelchair includes two armrest components spaced apart, the gap between the two armrest components being used to allow the backrest component to be folded.

[0017] According to the first aspect of the embodiment of the present application, the electric wheelchair includes a front wheel and rear wheel assembly comprising a frame, a front wheel component, and a rear wheel component, wherein the front wheel component and the rear wheel component are respectively disposed at the front and rear ends of the frame.

[0018] According to the first aspect of the embodiment of the present application, the electric wheelchair includes a foot pedal component that is detachably connected to the frame and is disposed at an adjustable tilt angle at the front end of the frame.

[0019] And / or the front wheel component is a swivel wheel or an all-directional wheel.

[0020] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0021] The present application will be further described below with reference to the accompanying drawings and embodiments;

[0022] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0023] Figure 2 This is a left view of an embodiment of this application.

[0024] Figure label:

[0025] 100. Front and rear wheel assemblies; 110. Frame; 120. Front wheel components; 130. Rear wheel components;

[0026] 200. Main support beam; 210. Installation platform;

[0027] 300, Seat assembly; 310, Backrest assembly; 320, Seat assembly; 330, Armrest assembly; 340, Foot pedal assembly; 400, Lifting assembly; 410, First electric actuator; 420, Second electric actuator. Detailed Implementation

[0028] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0029] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0030] In the description of this application, "several" means one or more, "more than" means at least two, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is for the purpose of distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0031] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly. Those skilled in the art can reasonably determine the specific meaning of the above terms in this application after considering the specific content of the technical solution.

[0032] Reference Figures 1 to 2 The electric wheelchair of the first aspect of this application includes a front and rear wheel assembly 100, a main support beam 200, a seat assembly 300, and a lifting assembly 400.

[0033] The main support beam 200 is hinged to the front and rear wheel assemblies 100; the seat assembly 300 is hinged to the main support beam 200; the lifting assembly 400 is used to drive the seat assembly 300 to lift, lower and fold. The lifting assembly 400 includes a first electric push rod 410 and a second electric push rod 420. The first electric push rod 410 is hinged between the main support beam 200 and the seat assembly 300, and the second electric push rod 420 is hinged between the front and rear wheel assemblies 100 and the main support beam 200.

[0034] Understandably, when the electric wheelchair needs to be folded, the lifting component 400 drives the main support beam 200 to move and lower the height of the seat component 300 to complete the folding, thereby ensuring safety. During the folding process, the front and rear wheel components 100 are not affected, but only the seat component 300 is lifted to achieve folding, so it does not affect the use after folding.

[0035] In some embodiments of this application, the seat assembly 300 includes a backrest component 310 and a seat component 320. The backrest component 310 is movably connected to the seat component 320 so that the backrest component 310 can be folded by pressing it down in a direction relatively close to the seat component 320. It should be noted that this electric wheelchair is foldable when not in use. In order to further reduce its size and facilitate storage, the folding of the electric wheelchair in this application is divided into two steps. The first step is to lower the seat assembly 300 using the lifting component 400. The second step is to manually press the backrest component 310 down to a position close to the seat component 320. By dividing the electric lifting and folding steps in the related technology, the problem that electric folding failure may injure the passenger is avoided, as well as the problem that folding affects the frame 110 and causes the casters to not be perpendicular to the ground. This allows the electric wheelchair to be equipped with an electric folding mechanism and further provides convenience of use.

[0036] Understandably, when the electric wheelchair needs to be folded, the lifting assembly 400 first moves the main support beam 200 and lowers the height of the seat assembly 300. Then, the backrest assembly 310 is manually pressed down towards the seat assembly 320 to complete the folding. Since the folding of the backrest assembly 310 needs to be done manually, safety can be ensured. Furthermore, the front and rear wheel assemblies 100 are not affected during the folding process. The folding is only achieved through the lifting seat assembly 300, so it does not affect the use after folding.

[0037] In some embodiments, the backrest component 310 and the seat component 320 are movably connected. When the wheelchair needs to be folded for storage, the height of the seat component 320 is lowered by controlling the lifting assembly 400. Then, the backrest latch is manually unlocked, the backrest is pressed down, and the footrest is flipped up to complete the folding. When the wheelchair needs to be used again, the same process is reversed: the backrest component 310 is unfolded and the latch is locked, thereby fixing the relative position of the backrest component 310 and the seat component 320. It is understood that since the backrest is manually folded, the risk of injury from squeezing the backrest during folding is eliminated. Folding the backrest allows for a smaller space and easier placement, while leaving the backrest open provides a higher position for easy pushing.

[0038] In some embodiments of this application, the electric wheelchair further includes a mounting platform 210, with the seat assembly 300 disposed on the mounting platform 210. A main support beam 200 is hinged to the mounting platform 210 so that the seat assembly 300 is indirectly disposed on the main support beam 200. It is understood that the mounting platform 210 is a connecting structural member, with the seat assembly 300 disposed on the mounting platform 210 and supported by the main support beam 200. In some embodiments, the seat assembly 300 is detachably mounted on the mounting platform 210 by means of snap-fit ​​fasteners. By removing the snap-fit ​​fasteners at the bottom of the seat assembly 300, the seat can be slid out. When reinstalling the seat, the snap-fit ​​fasteners can be used to lock it in place, thus facilitating storage and carrying.

[0039] In some embodiments of this application, the lifting assembly 400 includes a first electric push rod 410 and a second electric push rod 420. The first electric push rod 410 and the second electric push rod 420 are spaced apart along the length of the front and rear wheel assemblies 100 and form a linkage mechanism with the front and rear wheel assemblies 100 and the seat assembly 300. The first electric push rod 410 and the second electric push rod 420 drive the seat assembly 300 to rise, fall, and adjust its angle by extending and retracting. It is understood that the step of lowering the seat assembly 300 to achieve folding based on the first electric push rod 410 and the second electric push rod 420 does not affect the perpendicularity of the casters to the ground after folding, so it can be pushed during use.

[0040] In some embodiments of this application, one end of the main support beam 200 hinged to the front and rear wheel assemblies 100 is positioned relatively close to the end of the first electric push rod 410 hinged to the front and rear wheel assemblies 100, and the other end of the main support beam 200 hinged to the seat assembly 300 is positioned relatively close to the end of the second electric push rod 420 hinged to the seat assembly 300. It is understood that the main support beam 200 is inclined between the linkage mechanisms and its two ends are relatively close to diagonal positions, thereby enabling better structural stability.

[0041] In some embodiments, reference is made to Figure 2 One end of the main support beam 200 is located close to the same straight line as one end of the first connecting rod, and the other end of the main support beam 200 is located close to the same straight line as one end of the second connecting rod, thus making the structure more stable.

[0042] In some embodiments of this application, the lifting assembly 400 includes a control device and an angle sensor component. The angle sensor component is used to identify changes in the tilt angle of the seat assembly 300. The control device is used to receive information from the angle sensor component and control at least one of the first electric push rod 410 or the second electric push rod 420 to enable the seat assembly 300 to be raised and lowered horizontally. It is understood that by controlling the extension of the front electric push rod, the angle sensor built into the seat detects a change in the seat tilt angle. The main controller then drives the extension and retraction of the rear electric push rod to change the relative angle between the rear wheel assembly and the main support beam 200, thereby maintaining a constant tilt angle between the seat and the horizontal plane. Simultaneously, the seat can be raised and lowered by extending and retracting these two electric push rods.

[0043] In some embodiments of this application, the seat assembly 300 includes two armrest components 330 spaced apart, with the gap between the two armrest components 330 facilitating the folding of the backrest component 310. It is understood that the two armrest components 330 are located on either side of the backrest component 310, so the backrest component 310 will not interfere with the armrest components 330 when it moves, folds, or unfolds relative to the seat component 320. In some embodiments, the armrest components 330 and the seat component 320 are arranged parallel to each other, meaning that the armrests maintain a constant angle during the backrest folding process, without affecting the normal upward folding of the armrests.

[0044] In some embodiments, the tilt angle of the armrest component 330 is adjustable, meaning that the adjustment and use of the armrest component 330 are not affected even after the backrest component 310 is folded.

[0045] In some embodiments of this application, the front and rear wheel assembly 100 includes a frame 110, a front wheel component 120, and a rear wheel component 130, with the front wheel component 120 and rear wheel component 130 respectively disposed at the front and rear ends of the frame 110. It is understood that the frame 110 serves as a load-bearing foundation, with the main support beam 200, lifting assembly 400, front wheel component 120, and rear wheel component 130 respectively mounted on the frame 110. The front wheel component 120 and rear wheel component 130 enable the electric wheelchair to have normal driving functions.

[0046] In some embodiments, the front wheel component 120 is a swivel wheel or an all-wheel drive. It is understood that the front wheel component 120 can be replaced with a swivel wheel or an all-wheel drive while the other functions remain unchanged.

[0047] In some embodiments of this application, the seat assembly 300 includes a foot pedal component 340, which is detachably connected to the frame 110 and is adjustable in tilt angle at the front end of the frame 110. It is understood that the foot pedal component 340 can be adjusted in tilt angle based on usage habits, and can also be further adjusted and stowed when folded for convenient carrying and use. When the front wheel assembly 120 is replaced, the foot pedal component 340 can be replaced with an omnidirectional front pedal or a universal front pedal, without affecting normal use.

[0048] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. An electrically powered wheelchair, characterized in that include: Front and rear wheel assembly; The main support beam is hinged to the front and rear wheel assemblies; The seat assembly is hinged to the main support beam; A lifting assembly is used to drive the seat assembly to lift, lower, and fold. The lifting assembly includes a first electric push rod and a second electric push rod. The first electric push rod is hinged between the main support beam and the seat assembly, and the second electric push rod is hinged between the front wheel and rear wheel assemblies and the main support beam.

2. The electrically powered wheelchair of claim 1, wherein: The electric wheelchair also includes a mounting platform, the seat assembly is disposed on the mounting platform, and the main support beam is hinged to the mounting platform so that the seat assembly is indirectly disposed on the main support beam.

3. The electrically powered wheelchair of claim 2, wherein: The first electric push rod and the second electric push rod are spaced back and forth along the length direction of the front wheel and rear wheel assembly and form a linkage mechanism with the front wheel and rear wheel assembly and the mounting platform. The first electric push rod and the second electric push rod drive the seat assembly to rise and fall and adjust its angle by telescoping.

4. The electrically powered wheelchair of claim 3, wherein: One end of the main support beam that is hinged to the front and rear wheel assemblies is positioned relatively close to one end of the first electric push rod that is hinged to the front and rear wheel assemblies, and the other end of the main support beam that is hinged to the mounting platform is positioned relatively close to one end of the second electric push rod that is hinged to the mounting platform.

5. The power wheelchair of claim 3, wherein: The lifting assembly includes a control device and an angle sensor component. The angle sensor component is used to identify changes in the tilt angle of the seat assembly. The control device is used to receive information from the angle sensor component and control at least one of the first electric push rod or the second electric push rod to enable the seat assembly to be raised and lowered horizontally.

6. The electrically powered wheelchair of claim 2, wherein: The seat assembly is detachably mounted on the mounting platform via a snap-fit ​​mechanism.

7. The power wheelchair of claim 1, wherein: The seat assembly includes a backrest component and a seat component, the backrest component being movably connected to the seat component so that the backrest component can be folded by pressing down in a direction relatively close to the seat component.

8. The electrically powered wheelchair of claim 7, wherein: The seat assembly includes two armrest components spaced apart, with the space between the two armrest components used to allow the backrest component to fold.

9. The power wheelchair of claim 1, wherein: The front and rear wheel assembly includes a frame, a front wheel component, and a rear wheel component, with the front wheel component and the rear wheel component respectively disposed at the front and rear ends of the frame.

10. The electric wheelchair according to claim 9, characterized in that: The seat assembly includes a foot pedal component, which is detachably connected to the frame and is adjustable in tilt angle at the front end of the frame. And / or the front wheel component is a swivel wheel or an all-directional wheel.

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