| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid-filled vibration control device provided with a plurality of orifice passages, switching characteristics by an inexpensive structure. SOLUTION: In this liquid-filled vibration control device 10, a first orifice channel 34 tuned in to a low frequency area and a second orifice channel 36 tuned in to a high frequency area communicate a main liquid chamber 28A with an auxiliary liquid chamber 28B, and a flexible wall portion 56 formed of a rubber elastic body is arranged in the middle of the second orifice channel 36. The flexible wall portion 56 is composed of a main liquid chamber wall portion 58 facing the main liquid chamber 28A, and an auxiliary liquid chamber wall portion 60 opposed to the wall portion 58 and facing the auxiliary liquid chamber 28B, and is configured to be deflectably deformed by a difference in liquid pressure between the main liquid chamber 28A and the auxiliary liquid chamber 28B. When large-amplitude and low frequency vibration is inputted, the difference in liquid pressure becomes large. Thereby, the flexible wall portion 56 is deflectably deformed to substantially close the second orifice channel 36, and the characteristics are switched. COPYRIGHT: (C)2009,JPO&INPIT |
