| 摘要 |
PURPOSE:To settle the problem of bottoming, buffer cross-talk, etc. and give a good ride by providing actuators having a retractable function of the front side and rear side of a vehicle and enabling both of said actuators to be simultaneously operated to carry out retracting action or returning action. CONSTITUTION:A partition piston for partitioning the inside of a cylindrical body 2 into a gas chamber and an oil chamber is fitted in the cylindrical body 2 inserted into the cylinder 1 of an actuator 10 in a suspension device. An orifice block 26 is fixed to one end of he cylindrical body 2 while a free piston 4 is fitted over the outer periphery of the cylindrical body 2, partitioning inside of the cylinder 1 into a compression oil chamber 7 and an expansion oil chamber 6. Each chamber 7, 6 is connected to an oil pump 40 or a reserve tank 39 via an electromagnetic selector valve 37. In this case, front side and rear side actuators 10, 10 are connected to each other via pilot check valves 35, 36 and, them, connected to the electromagnetic selector valve 37, enabling the simultaneous operation of the actuators 10. |
