ELECTRIC WHEELCHAIR USED AS STAIRLIFT PROVIDED WITH A ROTARY DISC REPLACING THE SUPPORTING RAILS AND WITH RACK, MEANT FOR PERSONS WITH LOCOMOTOR DISABILITIES

摘要

The invention relates to an electric wheelchair, used as stairlift, provided with a rotary disc, meant for persons with locomotor disabilities. According to the invention, the wheelchair is provided with three wheels, namely a right and a left traction wheel (1 and 1'), and with a supporting wheel (2), respectively, each wheel (1, 1' and 2) being provided with a traction motor (Mt1, Mt1' and Mt2), a first right motor and second left motor, respectively, and a gear wheel (5) is equipped with a servomotor (SM5) which receives the command to rotate the said gear wheel (5) in one way or the other, depending on the deflection of an axis (O1''-O3'') of the wheelchair in relation to a vertical axis, determined by a gyroscope (8) consisting of a disc rotated by a servomotor (SM8), so that, during the operation, the axis of the ergonomic chair is kept in vertical position, because the deflection between the wheelchair axis and the chair axis is measured by a transducer (T) which emits a control signal to the servomotor (SM5) in order to superpose the two axes, thus preventing the overturning of the wheelchair, as well as keeping a friction force (Ff), which allows the wheelchair to move independently of the slope given by the stair inclination.