Electric drive for parking brake, has transmission with clutch for alternatively coupling transmission stages with engine, where one stage activates parking brake and other stage releases brake, and stages have different transmission ratio

摘要

The drive has a transmission (14) acting on a parking brake, where the transmission has two transmission stages (18, 20) and a clutch (36). The clutch alternatively couples the transmission stages with an engine (12), where one of the stages activates the brake and the other stage releases the brake. The stages have different transmission ratio, where one of the stages has a transmission unit for reversing the direction of output with same engine rotating direction.