| 摘要 |
PROBLEM TO BE SOLVED: To make liquid flow into a restricted passage completely for effective absorption of vibration when vibration occurs by fitting the first rigid body partition board for partitioning a pressure liquid chamber and the first auxiliary liquid chamber, and the second partition board of an elastic membrane for partitioning the first auxiliary liquid chamber and the second auxiliary liquid chamber. SOLUTION: At the time of shake vibration, liquid passes through the second restricted passage 40 and alternates between a pressure liquid chamber 28 and the second auxiliary liquid chamber 36. At this time, damping force is generated by resistance or liquid column resonance, and vibration is absorbed effectively. With this vibration, a rubber membrane 32 whose rigidity is high is hardly deformed, and liquid hardly flows into the first restricted passage 38. At the time of idle vibration, a restricted passage 40 becomes clogged, liquid passes through the restricted passage 38, alternates between the pressure liquid chamber 28 and the first auxiliary liquid chamber 34, and damps vibration by generating liquid column resonance. An elastic body 28 is elastically-deformed with shake or idle vibration and tries to push out liquid in the pressure liquid chamber 28 into the first restricted passage 38 or 40. Because its inner wall is a rigid body partition board 26 made of synthetic resin, however, liquid is pushed out into the restricted passage without fail. |
