| 摘要 |
A motor vehicle gearbox having two concentrically supported input shafts (6, 9), each of which drives an intermediate shaft (12, 15), which shafts have gears (16-19, 41) meshing with gears (21, 22, 40) on an output shaft. One intermediate shaft (12) has a central synchromesh arrangement (30), by means of which the intermediate shaft, which is drive-connected to the currently undriven input shaft, can be speeded up to a rotational speed determined by the gear selected. The central synchromesh arrangement (30) has a friction clutch (34) and two synchromesh gears (32, 33) of different diameters, of which the gear (33) with the smaller diameter is widened compared to the other and can be locked on the shaft (12) by means of a clutch sleeve (63), so that the drive torque in bottom gear can be transmitted from the one intermediate shaft (12) to the output shaft (20) by way of the synchromesh gear (33) and the primary gears (13) and (14) on the outer input shaft (9) and the second intermediate shaft (15) respectively. |
