Restriction of centrifugal and throw-out forces in motorised screwdriver

摘要

The centrifugal and throw-out forces in a machine-driven screwdriver are restricted by using a control unit to interrupt the machine rotation periodically. The forces occur between the driving recess in the screwdriver head and the matching insert. The speed interruption and the full speed are effected by the main switch, which is a two-stage unit, operating in sequence. The control unit for the speed interruption is on a shoulder outside the motor housing.