Arm for an electrical drive

摘要

In an arm for an electrical drive, its one end is connected to an electric motor and the other end is connected to a manual element and a multiplicity of rotatable elbows are provided between the electric motor and the manual element. Pulleys are provided for the rotatable elbows and two belt grooves are formed into each pulley. Different belts engage independently of one another with the two belt grooves and the drive shaft of the motor is rotatably coupled to the first pulley via a belt. The first pulley is rotatably coupled to the pulley of the next rotatable elbow by means of a different belt and the coupling structure extends successively as far as the manual element using independent belts.