Patent ID: 7300376

Claim:
A two-stage planetary gear set ( 1 ) having: an input shaft ( 2 ) and an output shaft ( 3 ), a sun gear ( 8 ), a ring gear ( 11 ), and a planet carrier ( 10 ) with planetary gears ( 9 ), a transmission housing ( 6 ), and an electromagnetic selection device having a sliding sleeve ( 14 ) for switching a first gear, in which the ring gear ( 11 ) can be coupled with the housing ( 6 ), and a second gear, in which the ring gear can be coupled with the sun gear ( 8 ), the sliding sleeve ( 14 ) being displaceable by an electromagnet comprising magnet coils ( 22 , 23 ) and an armature ( 24 ), wherein a bearing ( 19 ) directly connects the armature ( 24 ) to the sliding sleeve ( 14 ) such that the armature ( 24 ) is axially fixed to the sliding sleeve ( 4 ) but the sliding sleeve ( 4 ) is rotatable relative to the armature ( 24 ).