Auxiliary device for wheelchair to go up and down stairs

Abstract

The present invention provides an auxiliary device for a wheelchair to go up and down stairs, and belongs to the technical field of wheelchair auxiliary equipment. The auxiliary device for the wheelchair to go up and down stairs comprises a servo mechanism, a pneumatic mechanism, an actuating mechanism and two racks; the two racks are fixed on the stairs along a gradient direction of the stairs, and guide wheels in front of an electric wheelchair body are gears matched with the racks; the servo mechanism is arranged on one side of the electric wheelchair body; one pushing cylinder of the actuating mechanism is fixed at a front end of the servo mechanism, and the other pushing cylinder is driven by the servo mechanism to move back and forth; a front end of a push rod of each pushing cylinder is connected with a sucker; each pushing cylinder communicates a two-position five-way solenoid valve of the pneumatic mechanism through a pipeline in proper order, the two-position five-way solenoid valves and a vacuum generator all communicate with an air compressor, and each sucker communicates with a two-position two-way solenoid valve through pipelines, and the two two-position two-way solenoid valves both communicate with the vacuum generator. The device is more steady when going up and down stairs, and is not liable to sideslip and slide down.

Description

Technical field [0001] The invention belongs to the technical field of wheelchair auxiliary equipment, and in particular relates to an auxiliary device for wheelchairs to go up and down stairs. Background technique [0002] In real life, for some people who need to use a wheelchair to travel in a small duplex building, going up and down the stairs is not an easy task. [0003] There are currently three main types of stair-climbing wheelchairs in the market. One is the crawler-type stair-climbing wheelchair. It is relatively heavy, bulky, and bulky, and requires a large amount of kinetic energy when turning, and it has problems such as difficult turning. The other is a planetary stair-climbing wheelchair, which has no anti-skid braking and other functions when going up and down, and it is prone to side slip. Therefore, it needs manpower to pull it to prevent it from slipping when going up and down the stairs. The last type is a step-support wheelchair. Although it is safer, its tra...

AI Technical Summary

Problems solved by technology

[0003] There are mainly three types of stair-climbing wheelchairs in the market. One is the crawler-type stair-climbing wheelchair. It is relatively heavy, bulky, and cumbersome, and requires a large kinetic energy at the turning point, and there are problems such as difficulty in turning.

The other is a planetary stair-climbing wheelchair. It does not have anti-skid brakes and other functions when going up and down stairs, and it is prone to side slips. Therefore, it needs to be pulled by manpower to prevent it from slipping when going up and down stairs.

The last type is a stepping support wheelchair, although the safety is relatively high, but the transmission structure is complicated

Images