Rotary drive for strips of metal, plastic, paper or the like

摘要

The invention relates to a rotary drive for metal strips, having a drive drum, transmission and electric motor. On the drive side, a hydraulic motor is additionally connected to the transmission which hydraulic motor takes over from the electric motor when the speed drops below a minimum speed and, as a result of pressurisation, generates a predetermined torque, while the electric motor is uncoupled or switched off and rotates idly. <IMAGE>