Patent ID: 8393239

Claim:
A double clutch transmission comprising: first and second clutches (K 1 , K 2 ), each comprising an input side connected to a drive shaft (w_an) and an output side respectively connected to one of first and second transmission input shafts (w_K 1 , w_K 2 ) arranged coaxially with each other; toothed idler gearwheels ( 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ) being situated on the first and second countershafts (w_v 1 , w_v 2 ) such that the toothed idler gearwheels rotate; toothed fixed gearwheels ( 1 , 2 , 3 , 4 , 5 , 6 ) being arranged on the first and the second transmission input shafts (w_k 1 , w_k 2 ) in a rotationally fixed manner, and each one of the toothed fixed gearwheels ( 1 , 2 , 3 , 4 , 5 , 6 ) at least partially meshing with at least one of the idler gearwheels ( 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ); a plurality of coupling devices (A, B, C, D, E, F, G, H, I, J, K, L) for the coupling one of the idler gearwheels ( 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ) to one of the first and the second countershafts (w_v 1 , w_v 2 ) in a rotationally fixed manner; the first and the second countershafts (w_v 1 , w_v 2 ) each supporting a power take-off gear ( 20 , 21 ) meshing with a gearing of an output shaft (w_ab); and at least one shift element (N, P) for connection in a rotationally fixed manner of two toothed idler gearwheels such that at least a plurality of power-shiftable forward gears ( 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 ) and at least one reverse gear (R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 ) are shiftable; wherein a maximum of five gear planes ( 1 - 13 , 7 - 1 , 7 - 13 , 8 - 2 , 2 - 14 , 8 - 14 , 3 - 15 , 9 - 15 , 4 - 16 , 10 - 4 , 10 - 16 , 5 - 17 , 11 - 5 , 11 - 17 , 12 - 6 , 6 - 18 , 12 - 18 ) are provided, at least three of the five gear planes are dual gear planes ( 7 - 13 , 8 - 14 , 9 - 15 , 10 - 16 , 11 - 17 , 12 - 18 ) and for each dual gear plane ( 7 - 13 , 8 - 14 , 9 - 15 , 10 - 16 , 11 - 17 , 12 - 18 ), one idler gearwheel ( 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ) of the first and second countershafts (w_v 1 , w_v 2 ) meshes with one fixed gearwheel ( 1 , 2 , 3 , 4 , 5 , 6 ) of one of the first and the second transmission input shafts (w_k 1 , w_k 2 ), and for at least one of the dual gear planes ( 7 - 13 , 8 - 14 , 9 - 15 , 10 - 16 , 11 - 17 , 12 - 18 ), at least one idler gearwheel ( 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ) can be used for at least two gears so that at least one power-shiftable winding path gear is shiftable by the at least one shift element (N, P).