| 摘要 |
An actuating device (1) for the rotation of a stand (4) of a motorcycle (2) between a standing position and a rest position folded under the vehicle, and allowing also the reverse manoeuvre in order to rotate the stand from the position of vehicle on the stand up to that in which the vehicle lowers spontaneously. At least one hydraulic actuator (1) is provided that operates, between a first and a second position, an actuating member (7) or stem that engages with the stand (4) up to bringing it respectively from the rest position to the standing position. A flow control hydraulic circuit delivers liquid in pressure to the actuator (1) for moving the actuating member (7) from the first to the second position, and allows the back stroke of the actuating member (7) to the first position when the flow of the liquid ceases, whereby the stand (4) can be brought back to said rest position independently from the actuating member (7). When the stand is in the standing position and the actuating member (7) has turned back to the first position means are provided operated by the actuator (1) for starting the return rotation of the stand (4) from the standing position to the rest position up to a point wherein it is not necessary to bear the weight of the vehicle for carrying out the rotation. The actuator is particularly suitable for handling the stand of a motorcycle, with the advantages that in case of lack of pressure in the hydraulic circuit the stand is free in its movement towards the rest position in which it remains as if the device does not exist. Furthermore, the actuator makes easier the lowering step of the vehicle from the stand, even if the lowering from the stand is possible also in traditional way.
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