Electric wheel chair

Abstract

An electric wheelchair has a carriage with 4 wheels, a load-bearing plate on said carriage, the drive motor, speed reducer and a lift axle, which are fixed on said load-bearing plate, a belt used by said drive motor to actuate the lift axle consisting of internal tube, screw bolt and belt wheel, and a chair fixed to the bearing plate on the top of lift axle.

Description

【Technical Field】 [0001] The invention relates to an electric wheelchair, in particular to an electric wheelchair with forward and backward control and seat lifting functions. 【Background technique】 [0002] Electric wheelchairs are an indispensable necessity for the disabled in their daily lives. They can not only assist the disabled in the convenience of home life, reduce the burden on family members or caregivers, but also help the disabled to work or handle affairs. For the disabled, it is an indispensable tool. In practical applications, it is difficult to turn around in a narrow space. Therefore, the existing electric wheelchair is designed with a forward and backward structure, but due to the operation of the electric wheelchair The person is a handicapped person with poor mobility, so it is very unsafe to operate an electric wheelchair. [0003] Taiwan's new patent No. 466948 "Electric wheelchair with front and rear wheel drive combined" is that an axle column is arranged...

AI Technical Summary

Problems solved by technology

[0005] 1. The retraction behavior of the above-mentioned existing electric wheelchair is simply reversed. During the retraction, because the user cannot observe the rear situation, it can be said to be an extremely dangerous operation, and it is not a practical operation method.

[0006] 2. The Taiwan New Patent No. 466948 uses a control lever to control the rotation of the seat by 180 degrees. It is a manual control method. Obviously, the operation is not easy for the physically handicapped. After the control lever is out of the locked state, the rotation of the seat is not shown in the diagram, so it is really difficult to understand how it performs the steering action, and although there are front and rear seats that can be folded into the car body Pedals, however, require the user to lean forward and then use the hands to pull them. This not only increases the burden on the user, but also makes it easier for the user to fall. Therefore, it is difficult to say that it is completely practical.

[0011] 3. In addition, the Taiwan Model Patent No. 306261 case and the Taiwan Model Patent No. 328718 case can only obtain the best and most stable propping effect by using the actuating plate to rotate to the position, so they can only do one-stage Once the height adjustment of the seat cushion occurs and the object to be picked up is lower than the height of the human hand, the human body will inevitably lean forward before picking up the object, which is the center of gravity of the human body. Unsteady, resulting in an accident of falling the electric wheelchair

At the same time, if the seat cushion does not float up to its set height, that is, if the manual control is used to force the power off, the deflection angle after the float is not enough, and the center of gravity will shift, which will more easily cause the human body to fall into the electric wheelchair In addition, the motor and the semicircular driven gear used in the drive also become the stress point of the center of gravity, which is easy to cause the motor and the driven gear to fail.

[0012] 4. In addition, the Taiwan Model Patent No. 306261 case and the Taiwan Model Patent No. 328718 case use a motor to drive a semicircular driven gear. Although the rotation of the motor can be set to a slower speed, its The speed of ascent is still changing too fast, which makes it uncomfortable for the handicapped to control the altitude

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