lifting device for disabled people in wheelchairs and children &# 39 ; s pushchairs , comprising a supporting frame , permanently applied to a motor vehicle or a fixed installation , and a sliding foldaway platform moving between a retracted position and an extracted position , with respect to said supporting frame . the platform can also move in said extracted position , between a lowered position and a raised position , by means of an articulated parallelogram linkage system . the movements of the platform are achieved by means of electrical actuators .