Patent ID: 7175562

Claim:
A multistage transmission of planetary structure for a motor vehicle comprising: a drive input shaft ( 1 ) and a drive output shaft ( 2 ) arranged in a housing, first, second and third planetary gearset assemblies (P 1 , P 2 , P 3 ), at least third, fourth, fifth and sixth rotatable shafts ( 3 , 4 , 5 , 6 ) and five shift elements ( 03 , 04 , 05 , 13 , 16 ) comprising only first, second and third brakes ( 03 , 04 , 05 ) supported by the housing and first and second clutches ( 13 , 16 ), wherein the drive input shaft ( 1 ) provides a drive input for the multi-stage transmission and is connected directly to a first one of a sun gear wheel of the first planetary gearset assembly (P 1 ) and a web of the first planetary gearset assembly (P 1 ), the drive output shaft ( 2 ) is connected to an annular gear wheel of the second planetary gear-set assembly (P 2 ) and to a web of the third planetary gearset assembly (P 3 ) and forms a drive output for the multi-stage transmission, the third shaft ( 3 ) is connected to a web of the second planetary gearset assembly (P 2 ) and to an annular gear wheel of the third planetary gearset assembly (P 3 ), the fourth shaft ( 4 ) is connected to a sun gear wheel of the second planetary gear set (P 2 ) and to an annular gear wheel of the first planetary gearset assembly (P 3 ), the fifth shaft ( 5 ) is connected to the second one of the web of the first planetary gear set (P 1 ) and the sun gear wheel of the first planetary gearset assembly (P 1 ), and the sixth shaft ( 6 ) is connected to a sun gear wheel of the third planetary gearset assembly (P 3 ), such that the third shaft ( 3 ) can be coupled to the housing by the third brake ( 03 ), the fourth shaft ( 4 ) can be coupled to the housing by the first brake ( 04 ), the first clutch ( 13 ) can couple the input drive shaft ( 1 ) to the third shaft ( 3 ), the second clutch ( 16 ) can couple the input drive shaft ( 1 ) to the sixth shaft ( 6 ), and the second brake ( 05 ) can couple the fifth shaft ( 5 ) to the housing, such that the selective engagement of pairs of the five shift elements results in various transmission ratios between the drive input shaft ( 1 ) and the drive output shaft ( 2 ) so that six forward gears and one reverse gear can be engaged.