| 摘要 |
<p>Described herein is a hydraulic servo (1) for a gear change provided with a control shaft (2); the servo (1) has: a frame (4); a first hydraulic actuator (5), which is carried by the frame (4) and has two first chambers (7), which are alternatively filled with a pressurized fluid for displacing the control shaft (2) axially in the two directions; two first solenoid valves (26), which control filling of the two first chambers (7); a second hydraulic actuator (6), which is carried by the frame (4) and has at least one second chamber (14) that is filled with a pressurized fluid for rotating the control shaft (2) about its central axis (3); a second solenoid valve (27), which controls filling of the second chamber (14); and a supporting body (25), which is fixed to the frame (4), houses the solenoid valves (26, 27), and has inside it a series of hydraulic circuits (31, 40), which connect the solenoid valves (26, 27) themselves both to the chambers (7, 14) of the actuators (5, 6) and to a supply of the pressurized fluid.</p> |
