| 摘要 |
Fluid-controlled actuator assembly (1, 1') for a gearbox (2) of a vehicle, provided with a four-position mobile element (33, 38, 39), with a first and a second chamber (45, 46) separated in a sealed manner from the mobile element (33, 38, 39), with auxiliary positioning means (25, 26, 40, 41) suitable for determining a stop position of the mobile element (33, 38, 39), with a first and a second solenoid valve (5, 6) suitable for supplying pressurized fluid respectively to the first and to the second chamber (45, 46) and for discharging it from them, such that when the fluid is supplied into both the chambers (45, 46), the mobile element (33, 38, 39) is maintained by the auxiliary positioning means (25, 26, 40, 41) in the stop position, and when the fluid is supplied into one of the chambers (45, 46) and is discharged from the other (46, 45), the mobile element (33, 38, 39) adopts one of two lateral positions with respect to the stop position, and with a first and a second spring (59, 60) associated with the mobile element (33, 38, 39) and suitable for maintaining the said mobile element (33, 38, 39) in a rest position interposed between the stop position and one of the lateral positions when the fluid is discharged from both the chambers (45, 46). <IMAGE> |
