Electric power-assisted wheelchair

Abstract

The utility model discloses an electric power-assisted wheelchair, which aims at transforming hand grab wheels, utilizing a motor to assist the wheelchair to move, and enabling a rider to control the wheelchair through the hand grab wheels, and adopts the technical scheme that the electric power-assisted wheelchair comprises two side frames and a cross arm connected with the two side frames, front wheels and rear wheels are arranged at the bottoms of the side frames, and the cross arm is connected with the two side frames. The middle of the side frame is provided with a grabbing hand wheel for a passenger to grab, a motor is embedded in the grabbing hand wheel, the motor is connected with the side frame to drive the grabbing hand wheel to rotate, a first synchronous wheel is fixed to the grabbing hand wheel, a second synchronous wheel is arranged on the rear wheel, and the first synchronous wheel is connected with the second synchronous wheel. The first synchronous wheel and the second synchronous wheel are in transmission connection through a synchronous belt.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of wheelchair, more specifically, it relates to a kind of electric power-assisted wheelchair. BACKGROUND

[0002] Patent CN200810204473.8 discloses a folding wheelchair, including frame, seat tube on frame, armrest tube on seat tube, foot pedal tube and pedal connected at one end of foot pedal tube, rear wheel is provided on the frame after base, front wheel is provided before base, and folding mechanism of folding wheelchair is arranged under base;

[0003] The above-mentioned wheelchair needs to manually operate the rear wheel to drive or stop the wheelchair movement, therefore, the diameter of the rear wheel needs to be relatively large to facilitate the passenger to operate the rear wheel. Under this structure, the passenger needs to spend more effort to rotate the rear wheel or stop the rear wheel, which is heavy for the passenger, and the wheelchair is inconvenient to use. SUMMARY

[0004] The main purpose of the utility model is to provide a kind of electric power-assisted wheelchair, it aims at the modification of hand wheel, utilizes motor to help wheelchair movement, and passenger can control wheelchair by hand wheel.

[0005] According to the first aspect of the utility model, an electric power-assisted wheelchair is provided, including two side frames and a cross arm connecting the two side frames, the bottom of the side frame is provided with front wheel and rear wheel, the middle part of the side frame is provided with hand wheel for the passenger to grab, the motor is embedded in the hand wheel, the motor is connected with the side frame to drive the hand wheel to rotate, the first synchronous wheel is fixed on the hand wheel, the second synchronous wheel is provided on the rear wheel, and the first synchronous wheel and the second synchronous wheel are connected by synchronous belt transmission.

[0006] In the above-mentioned electric power-assisted wheelchair, the outer diameter of the rear wheel is greater than the outer diameter of the front wheel.

[0007] In the above-mentioned electric power-assisted wheelchair, an auxiliary wheel is provided on the side frame, and the auxiliary wheel is located on the side of the rear wheel away from the front wheel.

[0008] In the above-mentioned electric power-assisted wheelchair, a mounting bracket is provided on the side frame, the auxiliary wheel is fixed on the mounting bracket, and the position of the mounting bracket on the side frame is adjustable to adjust the distance between the auxiliary wheel and the ground.

[0009] In the above-mentioned electric power-assisted wheelchair, a handrail is provided on the side frame, and the height of the handrail is adjustable.

[0010] In the above-mentioned electric power-assisted wheelchair, the top of the cross arm is connected with a seat cushion, and a backrest is connected between the two side frames.

[0011] In the above electric power-assisted wheelchair, the side frame is fixed with a footrest support, and the footrest support is provided with a footrest.

[0012] In the above electric power-assisted wheelchair, the footrest support comprises a connecting frame and a telescopic pipe body, the connecting frame is fixedly connected with the side frame, the telescopic pipe body is connected with the connecting frame, and the position of the telescopic pipe body on the connecting frame is adjustable, and the footrest is fixed on the telescopic pipe body.

[0013] In the above electric power-assisted wheelchair, the motor is a brushless motor.

[0014] In the above electric power-assisted wheelchair, the cross arm is provided with a battery and a controller, and the controller and the motor are connected with the battery respectively.

[0015] The above technical solution of the utility model has one of the following advantages or beneficial effects:

[0016] In the utility model, the hand wheel is optimized, and the brushless motor is embedded in the hand wheel. The brushless motor is connected with the side frame to drive the hand wheel to rotate. The hand wheel is connected with the rear wheel through the synchronous belt transmission structure to drive the rear wheel to rotate. The wheelchair can be moved. When in use, the rider rotates the hand wheel. The brushless motor is started when the wheelchair drives it. The wheelchair is automatically driven to move. The rider does not need to rotate the hand wheel all the time. When stopping, the rider holds the hand wheel to prevent it from rotating. The brushless motor is closed when the wheelchair stops to keep the wheelchair from stopping. The wheelchair can be moved with the help of the utility model, and the rider can control it conveniently. DRAWINGS

[0017] The utility model will be further described below in combination with the drawings and examples.

[0018] Figure 1 It is the structural schematic diagram of the first embodiment of the utility model.

[0019] Figure 2 It is the structural schematic diagram of the first embodiment of the utility model. Figure 1 It is the local enlarged view of A.

[0020] Figure 3 It is another structural schematic diagram of the first embodiment of the utility model.

[0021] Figure 4 It is the connection schematic diagram of the hand wheel and the rear wheel of the first embodiment of the utility model.

[0022] In the drawings, the reference signs of each drawing are as follows:

[0023] 1, side frame; 11, seat cushion; 12, backrest; 13, armrest; 2, cross arm; 21, battery; 22, controller; 3, front wheel; 4, rear wheel; 41, second synchronous wheel; 5, hand wheel; 51, first synchronous wheel; 6, motor; 7, synchronous belt; 8, auxiliary wheel; 81, mounting bracket; 9, foot support; 91, connecting frame; 92, telescopic tube body; 10, foot plate. DETAILED DESCRIPTION

[0024] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application and cannot be understood as a limitation of the present application.

[0025] The disclosure below provides many different embodiments or examples for implementing different aspects of the present application.

[0026] Referring to Figures 1 to 4 As shown in the drawings, in one embodiment of the present application, an electric power-assisted wheelchair comprises two side frames 1 and a cross arm 2 connecting the two side frames 1, the bottom of the side frame 1 is provided with a front wheel 3 and a rear wheel 4, the middle of the side frame 1 is provided with a hand wheel 5 for the rider to grab, a brushless motor 6 is embedded in the hand wheel 5, the brushless motor 6 is connected with the side frame 1 to drive the hand wheel 5 to rotate, a first synchronous wheel 51 is fixed on the hand wheel 5, a second synchronous wheel 41 is provided on the rear wheel 4, the first synchronous wheel 51 and the second synchronous wheel 41 are connected by a synchronous belt 7;

[0027] The hand wheel 5 is optimized, a brushless motor is embedded in the hand wheel 5, the brushless motor is connected with the side frame 1 to drive the hand wheel 5 to rotate, the hand wheel 5 and the rear wheel 4 are connected by a synchronous belt transmission structure to drive the rear wheel 4 to rotate, and the wheelchair can move;

[0028] When in use, the rider rotates the hand wheel 5, the brushless motor is started by the driving of the wheelchair, and the wheelchair is automatically driven to move, the rider does not need to rotate the hand wheel 5 all the time, and according to the force with which the rider rotates the hand wheel 5, the rotation speed of the brushless motor driving the hand wheel 5 will change, and then the two rear wheels 4 can rotate at different speeds to complete the turning operation, when stopping, the rider holds the hand wheel 5 so that it cannot rotate, the brushless motor is closed when the wheelchair stops, and the wheelchair is kept stopped, which can assist the movement of the wheelchair and facilitate the control of the rider. Of course, the electric power-assisted wheelchair of the present application has a relatively slow speed, only assists the movement of the wheelchair, and reduces the manpower.

[0029] In the embodiment, the cross arm 2 is provided with a battery 21 and a controller 22, the controller 22 and the motor 6 are connected with the battery 21 respectively, the battery 21 supplies power for the motor 6 and the controller 22, a sensor is arranged in the gripper wheel 5, the sensor can detect whether the gripper wheel 5 rotates or stops and the strength of the rotation of the gripper wheel 5, based on this, the controller 22 controls the motor 6 to operate; the specific structure of the brushless motor of the application can refer to patent CN201710143871.2, and the embodiment will not be repeated here.

[0030] In the embodiment, the outer diameter of the rear wheel 4 is greater than that of the front wheel 3, and the rear wheel 4 can easily drive the wheelchair to move when rotating; the front wheel 3 is a universal wheel, which facilitates steering.

[0031] In the embodiment, the auxiliary wheel 8 is located on the side of the rear wheel 4 away from the front wheel 3, the mounting bracket 81 is arranged on the side frame 1, and the auxiliary wheel 8 is fixed on the mounting bracket 81; the position of the mounting bracket 81 on the side frame 1 is adjustable, so as to adjust the distance between the auxiliary wheel 8 and the ground; when the wheelchair is tilted backward, the auxiliary wheel 8 can contact the ground, thereby avoiding over-tilting of the wheelchair.

[0032] Generally, the mounting bracket 81 can be adjusted in position by a V-shaped pearl buckle.

[0033] In the embodiment, the top of the cross arm 2 is connected with a seat cushion 11, the backrest 12 is connected between the two side frames 1, and the armrest 13 is arranged on the side frame 1; the height of the armrest 13 is adjustable, so as to adapt to people of different heights.

[0034] The armrest 13 is slidably connected to the side frame 1, and after being adjusted to a suitable height, the armrest 13 is fixed by a bolt handle.

[0035] In the embodiment, the footrest bracket 9 is fixed on the side frame 1, and the footboard 10 is arranged on the footrest bracket 9, so as to place the feet of the occupant.

[0036] Specifically, the footrest bracket 9 includes a connecting frame 91 and an extension pipe body 92; the connecting frame 91 is fixedly connected with the side frame 1, the extension pipe body 92 is connected with the connecting frame 91, the position of the extension pipe body 92 on the connecting frame 91 is adjustable, and the footboard 10 is fixed on the extension pipe body 92.

[0037] Generally, the extension pipe body 92 can be adjusted in position by a V-shaped pearl buckle.

[0038] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. An electric power-assisted wheelchair, characterized by comprising: The utility model relates to a two-wheeled scooter, comprising two side frames and a cross arm connecting the two side frames, the bottom of the side frame is provided with front wheels and rear wheels, the middle of the side frame is provided with a handrail wheel for the rider to grab, a motor is embedded in the handrail wheel, the motor is connected with the side frame to drive the handrail wheel to rotate, a first synchronous wheel is fixed on the handrail wheel, a second synchronous wheel is arranged on the rear wheel, and the first synchronous wheel and the second synchronous wheel are connected through a synchronous belt transmission.

2. The electrically powered wheelchair of claim 1, wherein The outer diameter of the rear wheel is larger than that of the front wheel.

3. The electrically powered wheelchair of claim 1, wherein An auxiliary wheel is arranged on the side frame, and the auxiliary wheel is located on the side of the rear wheel away from the front wheel.

4. The electrically powered wheelchair of claim 3, wherein An installation support is arranged on the side frame, the auxiliary wheel is fixed on the installation support, and the position of the installation support on the side frame is adjustable to adjust the distance between the auxiliary wheel and the ground.

5. The electrically powered wheelchair of claim 1, wherein, An armrest is arranged on the side frame, and the height of the armrest is adjustable.

6. The electrically powered wheelchair of claim 1, wherein, A seat cushion is connected to the top of the cross arm, and a backrest is connected between the two side frames.

7. The electrically powered wheelchair of claim 1, wherein, A footrest support is fixed on the side frame, and a footboard is arranged on the footrest support.

8. The electrically powered wheelchair of claim 7, wherein, The footrest support comprises a connecting frame and an extension pipe body, the connecting frame is fixedly connected with the side frame, the extension pipe body is connected with the connecting frame, the position of the extension pipe body on the connecting frame is adjustable, and the footboard is fixed on the extension pipe body.

9. The electrically powered wheelchair of claim 1, wherein, The motor is a brushless motor.

10. The electrically powered wheelchair of claim 1, wherein, A battery and a controller are arranged on the cross arm, and the controller and the motor are respectively connected with the battery.

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