WO2018161443A1

WO2018161443A1 - Electric wheelchair

Info

Publication number: WO2018161443A1
Application number: PCT/CN2017/086242
Authority: WO
Inventors: Chuanfeng YIN
Original assignee: Yin Chuanfeng
Priority date: 2017-03-06
Filing date: 2017-05-27
Publication date: 2018-09-13
Also published as: CN108524122A

Abstract

An electric wheelchair is provided. The electric wheelchair comprises a chassis (08), a walking mechanism, a seat, a seat level adjustment mechanism and a seat gravity-center adjustment mechanism. Two sets of rubber tracks (09) are respectively arranged on the left and right sides of the electric wheelchair, forming four independent suspension walking mechanisms. The two sets of rubber tracks (09) keep an angle of about 160°at no-load mode, and keep an angle of about 180°at full-load mode. The electric wheelchair can walk on a flat road, climb uphill and go downhill freely. The electric wheelchair can go upstairs and downstairs without reversing action.

Description

Electric Wheelchair

FIELD OF THE INVENTION

The present invention relates to a wheelchair, particularly to an electric wheelchair.

BACKGROUND OF THE INVENTION

At present, electric wheelchairs in a domestic country and other countries may be driven in a flat road and a slope and may also go up and down stairs. But when going upstairs, many wheelchairs only can go by reversing, does the wheelchair reverse when going upstairs？ This will bring great inconvenience to the people with walking disabilities and creates insecurity, therefore, we need to provide an electric wheelchair which may be driven at the flat road and the slope, also can go up and down the stairs, and go straightly up and down without a reverse, being more convenient for the people with walking disabilities to walk.

DESCRIPTION OF THE INVENTION

The present invention aims at providing an electric wheelchair which may be driven at a flat road and a slope, also go up and down stairs, and go straightly up and down without a reverse. The electric wheelchair comprising a chasing, a walking mechanism (rubber tracks, suspension, driving wheels, driven wheels and shock absorber) , a seat (cushion, backrest, pedal, handrails, headrest, closet seat pad, urinal, backrest pushing rod and foot pad pushing rod) , a seat level adjustment mechanism (semi-circular gear, driving gear and a gear bracket) , a seat gravity-center adjustment mechanism (cylindrical linear guiderails and ball screw) , a power system (drive motor, a seat level adjustment mechanism motor and a seat weight-center adjustment mechanism motor) , a power supply (battery pack) and an electrical control system (a walking controller and a seat controller) . The chasing is a frame-shape and bears all components； the walking mechanism comprising the rubber tracks, the suspension, the driving wheels, the driven wheels and the shock absorber, At Left and right side symmetrically were equipped with two sets of rubber track each , each set of the rubber tracks are provided with one driving wheel and a plurality of the driven wheels, the driving wheels of two sets of the rubber tracks at each side are linked by a chain, one of driving wheels is driven by the motor, the suspension of each set of the rubber tracks takes an axis of the driving wheel as an axis thereof, and is connected with the chasing via the axis and the shock absorber, to form four independent suspended walking mechanisms. The seat including the cushion, the backrest, the pedal, the handrails, the headrest, the closet seat pad, the urinal, the backrest pushing rod and the foot pad pushing rod, the closet seat pad is positioned behind the cushion and may be drawn out, the urinal rightly under the closet seat pad and matched with the closet seat pad may also be drawn out, the closet seat pad and the urinal are used for a user to answer a call of nature, the backrest and the foot pad may be erected or laid down via the backrest pushing rod and the foot pad pushing rod. The seat level adjustment mechanism including semi-circular gear, driving gear and gear bracket, two semi-circular gears form an n-shape and are mounted at the bottom of the seat, the gear bracket forms a U-shape and is mounted on the sliding block of the cylindrical linear guide rails of the seat gravity-center adjustment mechanism, -the driving gear is mounted on the upper portion of the gear bracket and links the semi-circular gear to rotate the seat so as to adjust to the level. The seat gravity-center adjustment mechanism including cylindrical linear guide rail and ball screw, two cylindrical linear guide rails are mounted on the chasing, the ball screw is mounted at the middle of the two cylindrical linear guide rails, a screw nut and slide blocks of the cylindrical linear guide rails are mounted at the bottom of the gear bracket. The power system including two drive motors at the left and the right sides, one for seat level adjustment mechanism motor and the other one for the seat weight-center adjustment mechanism motor. The power supply is the battery pack. The electric control system including a walking controller and a seat controller, the walking controller mainly controls the operation of auxiliary equipment such as driving motors or an indicator light and so on, the seat controller mainly controls seat level adjustment mechanism motor, seat gravity-center adjustment mechanism motor, backrest pushing rod and foot pad pushing rod, to carry out the adjustment of the level of the seat and the automatic adjustment of the gravity center, and to erect or lay down the backrest and the foot pad. Two sets of the rubber tracks remain at an angle of about 160° at no-load mode, two sets of the rubber tracks keep an angle of 180° when the two sets of rubber tracks are kept at full load, when going upstairs two sets of the rubber tracks maintain an angle of about 180°, the seat automatically adjusted to the level, the seat center of gravity automatically moving forward, When going downstairs two sets of the rubber tracks keep an angle of about 180°, the seat automatically adjusted to the level and the center of gravity of the seat is automatically moved backward； two sets of the rubber tracks hold an angle of about 180° when starting going upstairs, the seat automatically is adjusted to the level and the center of gravity of the seat automatically is moved_forward； two sets of the rubber tracks maintain an angle of about 160° when going downhill, the seat automatically adjusted to the level and the center of gravity of the seat automatically being moved_backward. The electric wheelchair may walk freely on the flat road, an uphill and a downhill, go upstairs and downstairs freely, and go straightly up and down without the reverse, having the advantages of simple operation and safe use.

BRIF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a front view of the present invention.

FIG. 2 is a back view of the present invention.

FIG. 3 is an operation view of the present invention.

DETAILED DESCRIPTION OF PARTICULAR EMBODIMENTS

As were shown in FIGS 1, 2 and 3. The present invention relates to an electric wheelchair, including of a chasing, a walking mechanism (rubber tracks, suspension, driving wheels, driven wheels and shock absorbers) , a seat (cushion, backrest, pedal, handrails, headrest, closet seat pad, urinal, backrest pushing rod and foot pad pushing rod) , seat level adjustment mechanism (semi-circular gear, driving gear and gear bracket) , a seat gravity-center adjustment mechanism (cylindrical linear guide and ball screw) , a power system (drive motor, seat level adjustment mechanism motor, seat weight-center adjustment mechanism motor) , a power supply (battery pack) and an electrical control system (walking controller and seat controller) . the chasing (08) is a frame-shape and bears all components； the walking mechanism comprising the rubber tracks (09) , the suspension (11) , the driving wheels (10) , the driven wheels (12) and the shock absorber (14) , and is provided with two sets of the rubber tracks (09) symmetrically at the left and the right sides each, each set of the rubber tracks (09) are provided with one driving wheel (10) and a plurality of the driven wheels (12) , the driving wheels (10) of the two sets of the rubber tracks (09) at each side are linked by a chain (13) , one driving wheel (10) is driven by the motor (15) , the suspension (11) of each set of the rubber tracks (09) takes an axis of the driving wheel as an axis thereof, and is connected with the chasing (08) via the axis and the shock absorber (14) to form four independent suspension walking mechanisms； the seat comprising the cushion (04) , the backrest (17) , the pedal (05) , the handrails (01) , the headrest (18) , the closet seat pad (19) , the urinal (21) , the backrest pushing rod (20) and the foot pad pushing rod (27) , the closet seat pad (19) is positioned behind the cushion (04) and may be drawn out, the urinal (19) rightly under the closet seat pad and matched with the closet seat pad (19) may also be drawn out, the closet seat pad (19) and the urinal (21) are used for a user to answer a call of nature, the backrest (17) and the foot pad (05) may be erected or laid down via the backrest pushing rod (20) and the foot pad pushing rod (27) ； the seat level adjustment mechanism comprising the semi-circular gear (26) , the driving gear (25) and the gear bracket (24) , two semi-circular gears (26) form an n-shape and are mounted at the bottom of the seat, the gear bracket (24) forms a U-shape and is mounted on a sliding block of the cylindrical linear guiderails (06) of the seat gravity-center adjustment mechanism, the driving gear (25) is mounted on the upper portion of the gear bracket (24) and links the semi-circular gear (26) to rotate the seat so as to adjust the level； the seat gravity-center adjustment mechanism comprising the cylindrical linear guiderails (06) and the ball screw (07) , two cylindrical linear guiderails (06) are mounted on the chasing (08) , the ball screw (07) is mounted at the middle of the two cylindrical linear guiderails (06) , a screw nut and the slide blocks of the cylindrical linear guiderails (06) are mounted at the bottom of the gear bracket (24) ； the power system comprising two drive motors (15) at the left and the right sides, one seat level adjustment mechanism motor (16) and one seat weight-center adjustment mechanism motor (23) ； the power supply is the battery pack (22) ； the electric control system comprising the walking controller (02) and the seat controller (03) , the walking controller mainly controls the operation of auxiliary equipment such as two driving motors (15) , an indicator light and so on, the seat controller mainly controls the seat level adjustment mechanism motor (16) , the seat gravity-center adjustment mechanism motor (23) , the backrest pushing rod (20) and the foot pad pushing rod (27) to realize the level of the seat and the automatic adjustment of the gravity center, and erect or lay down the backrest (17) and the foot pad (05) . Two sets of the rubber tracks remain at an angle of about 160° at no-load, two sets of the rubber tracks keep an angle of 180° when the two sets of rubber tracks are kept at full load, when going upstairs two sets of the rubber tracks maintain an angle of about 180°, the seat automatically adjusted to the level, the seat center of gravity automatically moving forward, When going downstairs two sets of the rubber tracks keep an angle of about 180°, the seat automatically adjusted to the level and the center of gravity of the seat is automatically moved backward； two sets of the rubber tracks hold an angle of about 180° when starting going upstairs, the seat automatically is adjusted to the level and the center of gravity of the seat automatically is moved forward； two sets of the rubber tracks maintain an angle of about 160° when going downhill, the seat automatically adjusted to the level and the center of gravity of the seat automatically being moved backward. The electric wheelchair may walk freely on a flat road, a uphill and a downhill, go upstairs and downstairs freely, and go straightly up and down without a reverse, having the advantages of simple operation and safe use.

Claims

An electric wheelchair, characterized in that it comprising a chasing, a walking mechanism , a seat, a seat level adjustment mechanism, a power system, a power supply,

- wherein the chasing is a frame-shape and bears all components；

- the walking mechanism comprising the rubber tracks, the suspension, the driving wheels, the driven wheels and the shock absorber, At Left and right side symmetrically were equipped with two sets of rubber track each , each set of the rubber tracks are provided with one driving wheel and a plurality of the driven wheels, the driving wheels of two sets of the rubber tracks at each side are linked by a chain, one of driving wheels is driven by the motor, the suspension of each set of the rubber tracks takes an axis of the driving wheel as an axis thereof, and is connected with the chasing via the axis and the shock absorber, to form four independent suspended walking mechanisms.
As claimed in claim l, characterized in that: the seat including the cushion, the backrest, the pedal, the handrails, the headrest, the closet seat pad, the urinal, the backrest pushing rod and the foot pad pushing rod,

- the closet seat pad is positioned behind the cushion and may be drawn out, the urinal rightly under the closet seat pad and matched with the closet seat pad may also be drawn out, the closet seat pad and the urinal are used for a user to answer a call of nature, the backrest and the foot pad may be erected or laid down via the backrest pushing rod and the foot pad pushing rod.
As claimed in claim l or 2 or 3, characterized in that: it also including a seat gravity-center adjustment mechanism, the seat gravity-center adjustment mechanism comprising cylindrical linear guide rail and ball screw, two cylindrical linear guide rails are mounted on the chasing, the ball screw is mounted at the middle of the two cylindrical linear guide rails, a screw nut and slide blocks of the cylindrical linear guide rails are mounted at the bottom of the gear bracket.
As claimed in claim3, characterized in that: the seat level adjustment mechanism including semi-circular gear, driving gear and gear bracket,

- two semi-circular gears form an n-shape and are mounted at the bottom of the seat,

- the gear bracket forms a U-shape and is mounted on the sliding block of the cylindrical linear guide rails of the seat gravity-center adjustment mechanism, -the driving gear is mounted on the upper portion of the gear bracket and links the semi-circular gear to rotate the seat so as to adjust the level.
As claimed in claim l or 2 or 3 or 4, characterized in that:

-the power system comprising two drive motors at the left and the right sides, one seat level adjustment mechanism motor and one seat weight-center adjustment mechanism motor.

- the power supply is the battery pack.
As claimed in claim l or 2 or 3 or 4 or 5, characterized in that: the electric control system comprising a walking controller and a seat controller, the walking controller mainly controls the operation of auxiliary equipment, the seat controller mainly controls seat level adjustment mechanism motor, seat gravity-center adjustment mechanism motor, backrest pushing rod and foot pad pushing rod , to carry out the level adjustment of the seat and the automatic adjustment of the gravity center, and erect or lay down the backrest and the foot pad,

- said auxiliary equipments including driving motors or an indicator light.
As claimed in any one of claim l to 6, characterized in that: Two sets of the rubber tracks remain at an angle of about 160°at no-load.
As claimed in any one of claim l to 7, characterized in that: two sets of the rubber tracks keep an angle of 180° when the two sets of rubber tracks are kept at full load.
As claimed in any one of claim l to 8, characterized in that: when going upstairs two sets of the rubber tracks maintain an angle of about 180°, the seat automatically adjusted to the level, the seat center of gravity automatically moving forward, When going downstairs two sets of the rubber tracks keep an angle of about 180°, the seat automatically adjusted to the level and the center of gravity of the seat is automatically moved backward； two sets of the rubber tracks hold an angle of about 180° when starting going upstairs, the seat automatically is adjusted to the level and the center of gravity of the seat automatically is moved forward； two sets of the rubber tracks maintain an angle of about 160° when going downhill, the seat automatically adjusted to the level and the center of gravity of the seat automatically being moved backward.
An electric wheelchair, characterized in that it including a chasing, a walking mechanism (rubber tracks, suspension, driving wheels, driven wheels and shock absorber) , a seat (cushion, backrest, pedal, handrails, headrest, closet seat pad, urinal, backrest pushing rod and foot pad pushing rod) , a seat level adjustment mechanism (semi-circular gear, driving gear and a gear bracket) , a seat gravity-center adjustment mechanism (cylindrical linear guiderails and ball screw) , a power system (drive motor, a seat level adjustment mechanism motor and a seat weight-center adjustment mechanism motor) , a power supply (battery pack) and an electrical control system (awalking controller and a seat controller) . The chasing is a frame-shape and bears all components； the walking mechanism comprising the rubber tracks, the suspension, the driving wheels, the driven wheels and the shock absorber, At Left and right side symmetrically were equipped with two sets of rubber track each , each set of the rubber tracks are provided with one driving wheel and a plurality of the driven wheels, the driving wheels of two sets of the rubber tracks at each side are linked by a chain, one of driving wheels is driven by the motor, the suspension of each set of the rubber tracks takes an axis of the driving wheel as an axis thereof, and is connected with the chasing via the axis and the shock absorber, to form four independent suspended walking mechanisms. The seat including the cushion, the backrest, the pedal, the handrails, the headrest, the closet seat pad, the urinal, the backrest pushing rod and the foot pad pushing rod, the closet seat pad is positioned behind the cushion and may be drawn out, the urinal rightly under the closet seat pad and matched with the closet seat pad may also be drawn out, the closet seat pad and the urinal are used for a user to answer a call of nature, the backrest and the foot pad may be erected or laid down via the backrest pushing rod and the foot pad pushing rod. The seat level adjustment mechanism including semi-circular gear, driving gear and gear bracket, two semi-circular gears form an n-shape and are mounted at the bottom of the seat, the gear bracket forms a U-shape and is mounted on the sliding block of the cylindrical linear guide rails of the seat gravity-center adjustment mechanism, -the driving gear is mounted on the upper portion of the gear bracket and links the semi-circular gear to rotate the seat so as to adjust the level. The seat gravity-center adjustment mechanism including cylindrical linear guide rail and ball screw, two cylindrical linear guide rails are mounted on the chasing, the ball screw is mounted at the middle of the two cylindrical linear guide rails, a screw nut and slide blocks of the cylindrical linear guide rails are mounted at the bottom of the gear bracket. The power system including two drive motors at the left and the right sides, one seat level adjustment mechanism motor and one seat weight-center adjustment mechanism motor. The power supply is the battery pack. The electric control system including a walking controller and a seat controller, the walking controller mainly controls the operation of auxiliary equipment such as driving motors or an indicator light and so on, the seat controller mainly controls seat level adjustment mechanism motor, seat gravity-center adjustment mechanism motor, backrest pushing rod and foot pad pushing rod, to carry out the level adjustment of the seat and the automatic adjustment of the gravity center, and erect or lay down the backrest and the foot pad.