Patent ID: 7258032

Claim:
A double clutch transmission comprising: a main input shaft for receiving an engine torque; a first input shaft rotating coaxially with the main input shaft; a second input shaft rotating both coaxially with the main input shaft and about an exterior circumference of the first input shaft; first and second clutches for selectively transmitting the engine torque of the main input shaft to the first and second input shafts, respectively; a drive gear unit including a plurality of drive gears disposed respectively on the first and second input shafts; a first output device including a first output shaft disposed parallel to and apart from the main input shaft by a predetermined distance and having a plurality of driven gears and a first output gear thereon, such that torques of drive gears on the first and second input shafts are selectively changed and output; a second output device including a second output shaft disposed parallel to and apart from the main input shaft by a predetermined distance and having a plurality of driven gears, a second output gear, and a reverse driven gear thereon, such that torques of drive gears on the first and second input shafts are selectively changed and output; and a differential gear commonly connected to the first output gear and the second output gear, wherein the reverse driven gear is axially offset from the drive gears on the first and second input shafts such that some gear teeth of the reverse driven gear are close to an exterior circumference of one of the first and second input shafts; and wherein the drive gear unit comprises: first and third drive gears on one of the first and second input shafts; and second, fourth, and sixth drive gears on another of the first and second input shafts.