| 摘要 |
There is disclosed a locking device for locking the transmission system of a vehicle to prevent reverse rotation of the transmission system. A freewheel device (84-89) is drivable either directly or via a belt drive to rotate in the reverse direction of motion of the drive shaft of the vehicle. The reverse motion of the freewheel device operates either a quadrant gear or a plurality of linked arms (91, 93) to pivot a roller support (11) into engagement with teeth (14) of a ratchet wheel (3) fixedly mounted relative to the drive shaft, thereby preventing further reverse rotation of the drive shaft and hence the transmission system. Conveniently, the locking device is provided with disengagement means (20) in the form of an electromagnet (23) or cable operable to effect disengagement of the freewheel device and quadrant gear or alternatively a clutch interconnecting the freewheel device with the plurality of linked coupling arms. |
