Step-striding device used on wheelchair

Abstract

Most of wheelchairs are only suitable for running on the flat ground, and the capability to stride over steps is low. By careful observation, one can see that the steps in public places and in front of business stores only have one step and the height thereof is about 10cm, and only by striding over the step, the range of movement of users can be greatly increased. The invention designs a set of mechanical arm device which can lift up the wheelchair and reach on the steps. The device is composed of a front and a rear mechanical arm, a jockey pulley and the like. The front and the rear mechanical arms are respectively installed with a group of jockey pulleys, wherein the front group is driven wheels and the rear group is driving wheels driven by a motor. When the wheelchair runs to the front edge of the steps, the user starts a power system to drive the front and rear mechanical arms to extend outwards and downwards, so as to lift up the wheelchair slowly and vertically; and the lifting amplitude can reach the height of the steps. As the front jockey pulleys tread on the step surface to lift up the wheelchair, at the time, if the driving motors of the rear group of jockey pulleys of the wheelchair are started, the wheelchair can be driven to run forwards to the steps.

Description

1. Technical field [0001] Belongs to the category of handicapped appliances 2. Background technology [0002] Wheelchairs have brought great convenience to patients and people with disabilities, especially electric wheelchairs. However, the fly in the ointment is that most electric wheelchairs on the market are only suitable for driving on flat ground, and their ability to cross obstacles is very low. When users drive these electric wheelchairs on the sidewalks of the city and want to do errands or shop, the steps in front of institutions and stores ruthlessly keep them out. A small step made them sigh. For a while, it is very difficult for these places in the society to reserve passages for the disabled according to national laws and regulations for wheelchair users to use. To expand the range of activities of wheelchair users, there is only a wheelchair that can cross steps. [0003] Take a closer look at our urban environment. Most of the steps in front of surrounding...

AI Technical Summary

Problems solved by technology

Therefore, when the front half of these "patented wheelchairs" climb up the steps or stairs, the wheelchair will be tilted too much and the center of gravity will be unstable and difficult to guarantee, which will affect the use of the wheelchair.

Of course, if the wheelbase of the front and rear wheels is greatly increased, this situation will be improved to a certain extent, but this will lose its flexibility and even make it difficult to use because of the greatly increased volume of the wheelchair, which is not advisable.

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