| 摘要 |
PURPOSE:To improve a control circuit of an orifice rotating drive for opening and closing the orifice to prevent a solenoid from exothermic reaction by providing a piston dividing a tube into two chambers and said orifice communicating to said both chambers in a variable attenuation force system shock absorber. CONSTITUTION:A rotary drive 17 arranged on the upper portion of a shock absorber is provided to rotate a shutter (not shown) for opening and closing an orifice (not shown) provided in a piston through a control rod 15, and provided with a pair of solenoids 41a, 41b. Cores 42a, 42b of the respective solenoids 41a, 41b are interconnected by an advancing and retreating member 44 to which is connected said rod 15 by a pin 15. Then, said solenoids 41a, 41b are connected to timers 56a, 56b through relays 57a, 57b and transistors 61a, 61b so that non-operation time set in the timers 56a, 56b can be set in a period between an operation and the next one. |
