Patent ID: 7201697

Claim:
A multi-speed transmission of planetary gear design for a motor vehicle comprising: one input shaft ( 1 ), one output shaft ( 2 ) and a third, fourth, fifth, sixth and seventh rotatable shafts ( 3 , 4 , 5 , 6 , 7 ) located in a housing (G); a first, second and third one-spider planetary gear sets (P 1 , P 2 , P 3 ); a first, second, third, fourth, fifth and sixth shifting elements ( 03 , 04 , 14 , 26 , 36 , 57 ) the selective engagement of which generates different reduction ratios between the input shaft ( 1 ) and the output shaft ( 2 ) so that seven forward gears and one reverse gear can be implemented; and wherein an input drive comprises the first shaft ( 1 ) permanently connected with a sun gear of the first planetary gear set (P 1 ) and an output drive comprises the output shaft ( 2 ) permanently connected with a sun gear of the third planetary gear set (P 3 ), the set (P 1 ) and a ring gear of the second planetary gear set (P 2 ), and the fifth rotatable shaft ( 5 ) is permanently connected with the second planetary gear set (P 2 ) and a ring gear of the third planetary gear set (P 3 ), the sixth rotatable shaft ( 6 ) is permanently connected with the second planetary gear set (P 2 ), the seventh rotatable shaft ( 7 ) is permanently connected with a spider of the first planetary gear set (P 1 ), the third rotatable shaft ( 3 ) is attachable to the housing (G) by the first shifting element ( 03 ), the fourth shaft ( 4 ) is attachable to the housing (G) by the second shifting element ( 04 ), the third shifting element ( 14 ) interconnects the input shaft ( 1 ) and the fourth rotatable shaft ( 4 ), the fourth shifting element ( 26 ) detachably interconnects the output shaft ( 2 ) and the sixth rotatable shaft ( 6 ), the fifth shifting element ( 36 ) detachably interconnects the third shaft ( 3 ) and the sixth shaft ( 6 ) and the sixth shifting element ( 57 ) detachably interconnects the fifth rotatable shaft ( 5 ) and the seventh rotatable shaft ( 7 ).