| 摘要 |
Stepwise change-speed transmission (15) between the engine and the drive shafts of the driven wheels of a motor vehicle including expansible driving and driven pulleys (2, 4) supported respectively by a main shaft (1) and a driven shaft (3), and a friction clutch (5) mounted on the driven shaft (3) to transmit drive from the driven pulley (4) to a differential (7) through a geared reversing unit (6) for engaging forward drive and reverse drive. The reversing unit (6) is designed in such a manner as to maintain the forward drive in permanent engagement and can be actuated by a hydraulic actuator (51) to engage the reverse drive. |
