Electrically powered wheelchair

Abstract

The application provides an electric wheelchair, which comprises a vehicle body and a vehicle base; the vehicle body comprises a vehicle body frame and a vehicle cushion installed on the vehicle body frame; the vehicle base comprises a base frame, wheels and a lifting mechanism; the wheels are installed on the base frame; the lifting mechanism comprises an outer housing, an inner housing, a central shaft assembly and a lifting power unit; the outer housing is installed on the base frame; the inner housing is accommodated in the outer housing; the lifting power unit is installed in the outer housing and can drive the inner housing to extend out of the outer housing; the central shaft assembly is installed in the inner housing and moves synchronously with the inner housing; and the extending end of the central shaft assembly is detachably connected with the bottom of the vehicle cushion. The electric wheelchair of the application realizes the functions of seat height adjustment and opening and folding of the universal wheel by using an electric push rod to drive the inner and outer housings and the base frame with four four-link structures, and has the advantages of seat lifting function and portability after the upper and lower parts are detached compared with the existing electric wheelchair.

Description

Technical Field

[0001] This invention relates to the field of electric wheelchair technology, and more particularly to a liftable electric wheelchair. Background Technology

[0002] Electric wheelchairs are a new generation of intelligent wheelchairs that are upgraded from traditional manual wheelchairs by adding high-performance power drive devices, intelligent control devices, batteries, and other components. They possess multiple functions such as forward movement, backward movement, steering, standing, and reclining. While existing electric wheelchairs offer flexible steering and comfortable seating, their seat height is generally fixed, preventing users from reaching items on high shelves while seated. Therefore, it is necessary to propose further solutions to address these issues. Summary of the Invention

[0003] The purpose of this invention is to provide an electric wheelchair to overcome the shortcomings of the prior art.

[0004] To achieve the above-mentioned objectives, the present invention provides an electric wheelchair, which includes: a body and a base;

[0005] The vehicle body includes: a body frame and a mat mounted on the body frame;

[0006] The vehicle base includes: a chassis, wheels, and a lifting mechanism;

[0007] The wheels are mounted on the chassis; the lifting mechanism includes: an outer shell, an inner shell, a central shaft assembly, and a lifting power unit. The outer shell is mounted on the chassis, the inner shell is housed within the outer shell, the lifting power unit is mounted within the outer shell and can drive the inner shell to extend out of the outer shell, the central shaft assembly is mounted within the inner shell and moves synchronously with the inner shell, and the extended end of the central shaft assembly is detachably connected to the bottom of the mat.

[0008] As an improvement to the electric wheelchair of the present invention, the wheelchair cushion includes: a seat cushion and a backrest; the vehicle frame includes: a seat frame, a back frame, footrests, and armrests;

[0009] The back frame is connected to the seat frame, the seat cushion is fixed to the seat frame, the backrest is fixed to the back frame, the footrest is connected to the seat frame via a footrest bracket, and the armrests are located on both sides of the seat cushion and connected to the seat frame.

[0010] As an improvement to the electric wheelchair of the present invention, the back frame, seat frame, footrest bracket and armrest are all movably connected, and a connecting rod is movably connected between the seat frame and the footrest.

[0011] As an improvement to the electric wheelchair of the present invention, the lifting power unit is an electric push rod, the inner shell is fitted onto the electric push rod and is connected to it in a transmission manner, and is able to drive the inner shell to extend out from the top opening of the outer shell.

[0012] As an improvement to the electric wheelchair of the present invention, the outer shell includes: a front outer shell and a rear outer shell assembled and connected thereto, the electric push rod is installed on both sides of the space enclosed by the front outer shell and the rear outer shell, and the inner shell includes: a front inner shell and a rear inner shell assembled and connected thereto.

[0013] As an improvement to the electric wheelchair of the present invention, the central shaft assembly includes: a central shaft, a central sleeve, and a central slide.

[0014] The central sleeve is fixed in the inner housing, the central shaft is coaxially installed in the central sleeve, the central slide is fitted on the central sleeve, the inner housing has a window that exposes the central slide, and the base frame is connected to the central slide and the outer housing.

[0015] As an improvement to the electric wheelchair of the present invention, the chassis includes a front wheel frame and a rear wheel frame, wherein the front wheel of the wheel is connected to the central slide via the front wheel frame, and the rear wheel of the wheel is connected to the central slide via the rear wheel frame.

[0016] As an improvement to the electric wheelchair of the present invention, both the front wheel frame and the rear wheel frame include: a support rod, a rocker arm, a connecting rod, and a wheel seat;

[0017] The rocker arm is a downward-curved arm, one end of which is movably connected to the wheel seat and the other end of which is movably connected to the lower part of the outer shell. One end of the support rod is movably connected to the wheel seat through the connecting rod, and the other end is movably connected to the slide.

[0018] As an improvement to the electric wheelchair of the present invention, the central shaft assembly further includes: an upper spring and a lower spring;

[0019] The upper spring, the central slide, and the lower spring are fitted onto the central sleeve, and are arranged sequentially from top to bottom. The upper spring is located between the central slide and the top surface of the window, and the lower spring is located between the central slide and the bottom surface of the window.

[0020] As an improvement to the electric wheelchair of the present invention, the wheels include: a front wheel, a drive wheel, and a rear wheel;

[0021] The drive wheels are installed on the left and right sides of the lifting mechanism and are driven by their respective motors; the front wheel is located in front of the drive wheel and is connected to the central slide through the front wheel bracket in the base frame; the rear wheel is located behind the drive wheel and is connected to the central slide through the rear wheel bracket in the base frame.

[0022] Compared with existing technologies, the advantages of this invention are as follows: The electric wheelchair of this invention uses an electric push rod to drive the inner and outer shells and the base frame with four four-bar linkages to achieve seat height adjustment and the opening and closing of the casters. Compared with existing electric wheelchairs, it not only has seat height adjustment but also the advantage of being portable after the upper and lower parts are disassembled. Furthermore, the electric wheelchair of this invention has front wheels, drive wheels, and rear wheels, with the front and rear wheels providing good balance and support, thus ensuring better safety for the electric wheelchair of this invention. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a perspective view of an embodiment of the electric wheelchair of the present invention;

[0025] Figure 2 for Figure 1 An exploded 3D view of the electric wheelchair shown.

[0026] Figure 3 for Figure 1 A schematic diagram of the folded state of the vehicle body;

[0027] Figure 4 for Figure 1 A schematic diagram of the folded state of the CRRC base. Detailed Implementation

[0028] The present invention will now be described in detail with reference to various embodiments. However, it should be noted that these embodiments are not intended to limit the present invention. Equivalent changes or substitutions in function, method, or structure made by those skilled in the art based on these embodiments are all within the protection scope of the present invention.

[0029] like Figure 1As shown, one embodiment of the present invention provides an electric wheelchair, which includes a body 10 and a base 20. The body 10 is detachably mounted on the base, thus facilitating disassembly and folding of the body and base, and providing the advantage of portability after disassembly.

[0030] In one embodiment, a pivotable buckle 11 may be provided between the vehicle body 10 and the vehicle base 20. When the buckle 11 is engaged with the vehicle body 10, the vehicle body 10 and the vehicle base 20 are in a combined state. When the buckle is pivoted to separate it from the vehicle body 10, the vehicle body 10 and the vehicle base 20 are in a disassembled state, and the two can be folded and stored separately.

[0031] like Figure 2 As shown, the vehicle body 10 includes: a body frame 12 and a mat 13 mounted on the body frame 12.

[0032] The vehicle cushion 13 includes a seat cushion 131 and a backrest 132. The vehicle frame 12 includes a seat frame 121, a backrest frame 122, footrests 123, and armrests 124. The backrest frame 122 is connected to the seat frame 121, the seat cushion 131 is fixed to the seat frame 121, the backrest 132 is fixed to the backrest frame 122, the footrests 123 are connected to the seat frame 121 via footrest 123 brackets, and the armrests 124 are located on both sides of the seat cushion and connected to the seat frame 121. Control levers are also provided on the armrests 124.

[0033] Reference Figure 3 As shown, to achieve folding of the disassembled vehicle body 10, the back frame 122, seat frame 121, footrest 123 bracket, and armrest 124 are all movably connected. In one embodiment, the movable connection can be a hinge connection. Additionally, to improve stability during pivot folding, a connecting rod is also movably connected between the seat frame 121 and the footrest 123.

[0034] Again Figure 2 As shown, the vehicle base 20 includes: a base frame 21, wheels 22, and a lifting mechanism 23.

[0035] The wheels 22 are mounted on the base frame 21. Specifically, the wheels 22 include: front wheels 221, drive wheels 222, and rear wheels 223. The drive wheels 222 are mounted on the left and right sides of the lifting mechanism and are driven by their respective motors 2221. Correspondingly, a battery 24 for powering the motors 2221 is also provided in the base 20. A mudguard 2222 is also provided above the drive wheels 222, with a headlight 2223 on the front wall, a taillight 2224 on the rear wall, and turn signals 2225 on the side walls.

[0036] The front wheel 221 is located in front of the drive wheel 222 and is connected to the center slide via the front wheel bracket 211 in the base frame 21. The rear wheel 223 is located behind the drive wheel 222 and is connected to the center slide via the rear wheel bracket 212 in the base frame 21. In one embodiment, both the front wheel 221 and the rear wheel 223 are swivel wheels, which are connected to the base frame 21 via corresponding front and rear forks 224.

[0037] The lifting mechanism 23 is used to adjust the height of the seat and includes: an outer shell 231, an inner shell 232, a central shaft assembly 233, and a lifting power unit 234.

[0038] The outer shell 231 is mounted on the base frame 21, the inner shell 232 is housed within the outer shell 231, the lifting power unit 234 is mounted within the outer shell 231 and can drive the inner shell 232 to extend out of the outer shell 231, and the central shaft assembly 233 is mounted within the inner shell 232 and moves synchronously with the inner shell 232. The extended end of the central shaft assembly 233 is detachably connected to the bottom of the vehicle mat 13. Thus, when the lifting power unit 234 is working, it can drive the inner shell 232 to rise and fall, thereby adjusting the height of the vehicle body 10 connected to it.

[0039] The lifting power unit 234 can be an electric push rod. In this case, the inner housing 232 is fitted onto the electric push rod and is connected to it in a transmission manner, and can drive the inner housing 232 to extend out from the top opening of the outer housing 231. Thus, when the electric push rod is working, it can push out the inner housing 232 connected to it in a transmission manner, thereby raising the height of the vehicle body 10.

[0040] To facilitate the assembly of the aforementioned electric actuator and inner and outer housings 231, the outer housing 231 includes a front outer housing and a rear outer housing assembled therewith. The electric actuator is then mounted on both sides of the space enclosed by the front and rear outer housings. The inner housing 232 includes a front inner housing and a rear inner housing assembled therewith. In one embodiment, the front and rear outer housings, and the front and rear inner housings, can be assembled and connected by screws.

[0041] As described above, the outer casing 231 is mounted on the base frame 21. At this time, the central shaft 2331 assembly 233 includes: a central shaft 2331, a central sleeve 2332, and a central slide 2333. The central sleeve 2332 is fixed within the inner casing 232, the central shaft 2331 is coaxially mounted within the central sleeve 2332, the central slide 2333 is fitted onto the central sleeve 2332, and a window is provided on the inner casing 232 to expose the central slide 2333. The base frame 21 is connected to the central slide 2333 and the outer casing 231. Thus, the central shaft 2331 assembly 233 connects the vehicle body 10 and the base frame 21 as a single unit.

[0042] Furthermore, to improve the cushioning performance of the electric wheelchair in this embodiment, the central shaft 2331 assembly 233 also includes an upper spring 2334 and a lower spring 2335. The upper spring 2334, the central slide 2333, and the lower spring 2335 are fitted onto the central sleeve 2332, and are arranged sequentially from top to bottom. The upper spring 2334 is located between the central slide 2333 and the top surface of the window, and the lower spring 2335 is located between the central slide 2333 and the bottom surface of the window. Thus, with the help of the upper spring 2334 and the lower spring 2335, the force between the vehicle body 10 and the base frame 21 can be cushioned and absorbed, improving the comfort of riding the electric wheelchair.

[0043] The base frame 21 includes a front wheel frame 211 and a rear wheel frame 212. The front wheel 221 is connected to the center slide 2333 via the front wheel frame 211, and the rear wheel 223 is connected to the center slide 2333 via the rear wheel frame 212. Correspondingly, the center slide 2333 is provided with connecting lugs for easy connection to the front wheel frame 211 and the rear wheel frame 212.

[0044] Specifically, the front wheel frame 211 and the rear wheel frame 212 adopt the same structural design, both including: a strut 2111, a rocker arm 2112, a connecting rod 2113, and a wheel seat 2114. (See reference for details.) Figure 4 As shown, to achieve folding after the base is disassembled, the rocker arm 2112 is a downwardly curved arm, one end of which is movably connected to the wheel seat 2114, and the other end is movably connected to the lower part of the outer shell 231. One end of the support rod 2111 is movably connected to the wheel seat 2114 via the connecting rod 2113, and the other end is movably connected to the slide. In one embodiment, the movable connection can be a hinge connection.

[0045] In summary, the electric wheelchair of this invention achieves seat height adjustment and swivel wheel opening and closing functions by using an electric push rod to drive the inner and outer shells and the base frame with four four-bar linkages. Compared with existing electric wheelchairs, it not only has seat height adjustment but also the advantage of being portable after the upper and lower parts are disassembled. Furthermore, the electric wheelchair of this invention has front wheels, drive wheels, and rear wheels, with the front and rear wheels providing good balance and support, thus ensuring better safety for the electric wheelchair of this invention.

[0046] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0047] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An electric wheelchair, characterized in that, The electric wheelchair includes: a body and a base; The vehicle body includes: a body frame and a mat mounted on the body frame; The vehicle base includes: a chassis, wheels, and a lifting mechanism; The wheels are mounted on the chassis; the lifting mechanism includes: an outer shell, an inner shell, a central shaft assembly, and a lifting power unit. The outer shell is mounted on the chassis, the inner shell is housed within the outer shell, the lifting power unit is mounted within the outer shell and can drive the inner shell to extend out of the outer shell, the central shaft assembly is mounted within the inner shell and moves synchronously with the inner shell, and the extended end of the central shaft assembly is detachably connected to the bottom of the mat. The lifting power unit is an electric push rod, and the inner housing is fitted onto the electric push rod and connected to it in a transmission manner, and can drive the inner housing to extend out from the top opening of the outer housing; The outer shell includes a front outer shell and a rear outer shell assembled and connected thereto. The electric push rod is installed on both sides of the space enclosed by the front outer shell and the rear outer shell. The inner shell includes a front inner shell and a rear inner shell assembled and connected thereto. The central shaft assembly includes: a central shaft, a central sleeve, and a central slide; The central sleeve is fixed in the inner housing, the central shaft is coaxially installed in the central sleeve, the central slide is fitted on the central sleeve, the inner housing has a window that exposes the central slide, and the base frame is connected to the central slide and the outer housing. The chassis includes a front wheel frame and a rear wheel frame. The front wheel of the wheel is connected to the central slide via the front wheel frame, and the rear wheel of the wheel is connected to the central slide via the rear wheel frame. Both the front wheel frame and the rear wheel frame include: a strut, a rocker arm, a connecting rod, and a wheel seat; The rocker arm is a downwardly curved arm, one end of which is movably connected to the wheel seat and the other end of which is movably connected to the lower part of the outer shell. One end of the support rod is movably connected to the wheel seat through the connecting rod and the other end of which is movably connected to the central slide. The central shaft assembly also includes: an upper spring and a lower spring; The upper spring, the central slide, and the lower spring are fitted onto the central sleeve, and the three are arranged sequentially from top to bottom. The upper spring is located between the central slide and the top surface of the window, and the lower spring is located between the central slide and the bottom surface of the window. The wheels include: front wheels, drive wheels, and rear wheels; The drive wheels are installed on the left and right sides of the lifting mechanism and are driven by their respective motors; the front wheel is located in front of the drive wheel and is connected to the central slide through the front wheel bracket in the base frame; the rear wheel is located behind the drive wheel and is connected to the central slide through the rear wheel bracket in the base frame.

2. The electric wheelchair according to claim 1, characterized in that, The vehicle cushion includes: a seat cushion and a backrest; the vehicle frame includes: a seat frame, a backrest frame, footrests, and armrests. The back frame is connected to the seat frame, the seat cushion is fixed to the seat frame, the backrest is fixed to the back frame, the footrest is connected to the seat frame via a footrest bracket, and the armrests are located on both sides of the seat cushion and connected to the seat frame.

3. The electric wheelchair according to claim 2, characterized in that, The back frame, seat frame, foot pedal support, and armrests are all movably connected, and a connecting rod movably connects the seat frame and the foot pedal.

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