Epicycloidal gear train for automatic gear box of motor vehicle, has crown wheel formed from parts that respectively carry internal gear teeth and external surface, where one of parts is mounted with preset clearance at inside another part

摘要

The train has a crown wheel (2) in which an internal gear teeth (210) is arranged. An external surface cooperating with a driving unit e.g. motor, is arranged on the wheel. A planet gear engages with the internal gear teeth and with a planetary wheel. The crown wheel is formed from two distinct cylindrical crown wheel shaped parts (21, 22) connected in rotation along a rotational axis of the train, where the parts respectively carry the internal gear teeth and the external surface. The part (21) is mounted with a predetermined clearance at inside the part (22).