Patent ID: 7186204

Claim:
A multi-step transmission of a planetary construction for a motor vehicle, comprising: an input shaft ( 1 ) and an output shaft ( 2 ) which are arranged in a housing (G), first, second and third planetary gear sets (P 1 , P 2 , P 3 ), at least third, fourth, fifth, sixth, and seventh shaft ( 3 , 4 , 5 , 6 , 7 ), as well as at least six shifting elements ( 00 , 03 , 13 , 36 , 45 , 47 , 67 ), including brakes and clutches, whose selective engagement brings about different reduction ratios between the input shaft ( 1 ) and the output shaft ( 2 ) so that seven forward gears and one reverse gear are realized, drive input takes place through the input shaft ( 1 ) which is continuously connected with a first element of the first planetary gear set (P 1 ), a further element of the first planetary gear set (P 1 ) is torsion-resistantly fixed with the housing (G) via an eighth fixed shaft ( 0 ), drive output takes place through the output shaft ( 2 ) which is continuously in connection with a planet carrier of the second planetary gear set (P 2 ) and a ring gear of the third planetary gear set (P 3 ), the third shaft ( 3 ) is continuously connected with a planet carrier of the third planetary gear set (P 3 ), the fourth shaft ( 4 ) is continuously connected with a ring gear of the second planetary gear set (P 2 ), the fifth shaft ( 5 ) is continuously connected with a ring gear of the first planetary gear set (P 1 ), the sixth shaft ( 6 ) is continuously connected with a sun wheel of the second planetary gear set (P 2 ), the seventh shaft ( 7 ) is continuously connected with a sun wheel of the third planetary gear set (P 3 ), the third shaft ( 3 ) can be coupled to the housing (G) through a first brake ( 03 ), a first clutch ( 13 ) detachably connects the input shaft ( 1 ) and the third shaft ( 3 ) with one another, a second clutch ( 36 ) detachably connects the third shaft ( 3 ) and the sixth shaft ( 6 ) with one another, a third clutch ( 45 ) detachably connects the fourth shaft ( 4 ) and the fifth shaft ( 5 ) with one another, and fourth and fifth clutches ( 47 , 67 ) detachably connect the fourth shaft ( 4 ) and the sixth shaft ( 6 ) with one another, the fourth clutch ( 47 ) detachably connects the fourth shaft ( 4 ) and the seventh shaft ( 7 ) with one another, and the fifth clutch ( 67 ) detachably connects the sixth shaft ( 6 ) and the seventh shaft ( 7 ) with one another.