| 摘要 |
PURPOSE:To make any unbalance in performance due to a leak of seal parts preventable, by using two pairs of pistons and a cylinder, while eliminating the unbalance in vibration control force. CONSTITUTION:Two pairs of pistons 2 are attached to a cylinder 1 and these pistons are interconnected with each other through a piston rod 4. A leak (9) of oil 3 as a hydraulic fluid from each piston 2 is prevented from leaking to the outside of the cylinder by a seal 5, and it is ledinto an R point at the side of an oil tank 8 of a control valve mechanism 7 through a return pipe 10. Therefore, both B and C sides of the cylinder where the leak (9) occurs is coupled with the R point at the suction side of the control valve mechanism 7 whereby there is no occurrence of high pressure, thus any unbalance in performance due to a leak of seal parts is prevented from occurring. |
