Patent ID: 8425370

Claim:
A transmission unit, having in a transmission housing ( 13 a , 13 b ), a first, a second, a third, and a fourth planetary gear unit (P 1 a , P 2 a , P 3 a , P 4 a ; P 1 b , P 2 b , P 3 b , P 4 b ) disposed along a main axis of rotation ( 10 a ; 10 b ) and including first, second, third and fourth respective sun gears (P 11 a , P 21 a , P 31 a , P 41 a , P 11 b , P 21 b , P 31 b , P 41 b ) and respective first, second, third and fourth planetary gear carriers(P 12 a , P 22 a , P 32 a , P 42 a , P 12 b , P 22 b , P 32 b , P 42 b ), with the first planetary wheel carrier (P 12 a ; P 12 b ) and a second hollow wheel (P 23 a ; P 23 b ), being connected to each other in a rotationally fixed manner and with six clutch units (S 1 a , S 2 a , S 3 a , S 4 a , S 5 a , S 6 a ; S 1 b , S 2 b , S 3 b , S 4 b , S 5 b , S 6 b ) allowing for nine forward gears (V 1 a -V 9 a ; V 1 b -V 9 b ) to be engaged, with a drive unit ( 11 a ; 11 b ) rotationally fixedly connected to the second sun gear (P 21 a ; P 21 b ) of the second planetary gear units (P 2 a ; P 2 b ) and the fourth planetary wheel carrier (P 42 a ; P 42 b ) of the fourth planetary gear unit (P 4 a ; P 4 b ), and having a power output unit ( 12 a ; 12 b ) rotationally fixedly connected to the third planetary wheel carrier (P 32 a ; P 32 b ) of the third planetary gear transmission (P 3 a ; P 3 b ).