Patent ID: 7340973

Claim:
A twin-clutch transmission comprising: a first input shaft ( 14 ) for transmitting driving force from an engine via a first clutch ( 12 ); a second input shaft ( 18 ) for transmitting driving force from the engine via a second clutch ( 16 ); a first output shaft ( 20 ), a second output shaft ( 22 ), and a sub shaft ( 24 ) disposed parallel with the first input shaft and the second input shaft; a pair of first speed input and output gears ( 26 a , 26 b ) provided between the first input shaft and the first output shaft; a pair of fourth speed input and output gears ( 30 a , 30 b ) provided between the second input shaft and the first output shaft; a pair of third speed input and output gears ( 34 a , 34 b ) and a pair of fifth speed input and output gears ( 36 a , 36 b ) provided between the first input shaft and the second output shaft; a pair of second speed input and output gears ( 40 a , 40 b ) and a pair of sixth speed input and output gears ( 30 a , 42 b ) provided between the second input shaft and the second output shaft; a backward output gear ( 46 b ) provided on the first output shaft; and idler gears ( 46 c , 46 d ) provided on the sub shaft, wherein the third input near is integrated with the first input shaft, and wherein the idler gears connect the third input gear and the backward output gear to each other.