Apparatus for actuation of shift elements

摘要

An apparatus provided with a planet transmission gear drive with which transmission gear drive stages are constructed built-up and including the hollow-gear or annular gear ring arrangement fixed on the housing and planet carrier support arranged rotatably moveable with the planets. A shaft connected directly with a drive unit has a sun gear fastened thereon to drive the first transmission gear drive stage in order to attain a reduced reversal or return play. The end switch or shifter for drive units further has the last transmission gear drive stage including a hollow-gear or annular gear ring of the first transmission gear drive part arranged rotatable in the housing. The hollow-gear or annular gear ring forming the last transmission gear drive stage is provided with an outer tooth arrangement in which an adjustment worm guided in the housing meshes in engagement.