Drive unit with electric motor, gearbox and bearing stress relief

摘要

The end (15) of the shaft (2) of the rotor (1) rotates in a cylindrical roller bearing (16) set ito a bore in the gearbox casing (9) away from the roller bearing (12) of the larger gear wheel 911) on its hollow shaft (10). The rotor shaft enters the gearbox through a bore (14) in the motor housing (8) into which a lifting element (21) is radially movable (22) into contact with the shaft while the motor is at rest. The movement may be effected electrically, pneumatically, hydraulically or by rotation of a threaded spindle.