Patent ID: 7387588

Claim:
A planetary gear ( 8 ) comprising; an annulus ( 24 ); a sun gear ( 52 ); a planet gear carrier ( 10 ) with at least one planet wheel axle ( 18 ) on which at least one planet wheel ( 20 ) is mounted; and a switching device with a sliding collar ( 66 ) which in a first switching position enables a direct connection between a driving a shaft ( 44 ) which drives the planetary gear ( 8 ) and an output shaft ( 12 ) of the planetary gear ( 8 ); and in a second switching position enables modification of a revolution speed between the driving shaft ( 44 ) and the output shaft ( 12 ) of the planetary gear ( 8 ); wherein the at least one planet wheel ( 20 ) of the planetary gear is rotatably supported on a corresponding rotatable planet wheel axle ( 18 ) by an axle bearing assembly ( 22 , 88 ) and the at least one planet wheel axle ( 18 ) of the planetary gear is rotatably supported in the planet gear carrier 10 by a carrier bearing assembly ( 20 , 82 ); and the planet wheel axle ( 18 ) is mounted in the planet gear carrier ( 10 ) by a friction bearing assembly, and the planet wheel ( 20 ) is mounted on the planet wheel axle ( 18 ) by a roller bearing assembly.