Automatic transmission device for drive train of motor vehicle, has drift unit and planet pinion carrier connected with each other in torque proof manner, and three coupling elements connected with each other in torque proof manner

摘要

The device has planetary gear transmissions (P1a-P4a) arranged in series along a main rotation axis (10a). Six coupling units (S1a-S6a) are provided for switching nine forward gears with a drive unit (11a). Three coupling elements (S12a, S22a, S32a) are connected with each other in a torque proof manner, and a drift unit (12a) and a planet pinion carrier (P32a) are connected with each other in a torque proof manner. A sun wheel (P31a) and a coupling element (S11a) are connected with each other in a torque proof manner.