| 摘要 |
PURPOSE:To secure the vibration control performance in both the low and high frequency regions, preventing the generation of noise, abnormal noise, etc. CONSTITUTION:The first and the second installation members 1 and 2 which are separated each other in the vibration input direction are connected by a rubber elastic body 3, and a liquid chamber 4 which seals a liquid L by the rubber elastic body and a diaphragm 6 is formed. The liquid chamber is partitioned to the lower side pressure receiving chamber 4a and an upper side equillibrium chamber 4b by a partitioning body 15, and allowed to communicate through an orifice 10. Oh the partitioning body, a sealed chamber 16 in contact with a pressure receiving chamber through a rubber film is dividedly formed, and the sealed chamber is partitioned to the upper and lower chambers by a bulkhead member 17 having a through hole 17a. The rubber film 11 side of the lower chamber is charged with a liquid layer M, and the upper side is charged with an air layer G, and also the upper chamber is charged with the air layer G. When the high frequency side vibration is inputted, the deflection of the rubber film is facilitated by the action of a pneumatic spring of the air layer on the lower chamber side, and when the low frequency side vibration is inputted, the deflection of the rubber film is suppressed on the basis of the noncompressibility of the liquid layer after the air layer is compressed. |
