| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid sealed vibration control device sufficiently securing a leak quantity of liquid to a main liquid chamber from a sub liquid chamber, when excessively large negative pressure is generated in the main liquid chamber. SOLUTION: A liquid chamber of an engine mount is partitioned into the main liquid chamber 4 and the sub liquid chamber 5 by a partition member 10. The partition member 10 is held by a device body via a first elastic body 12, a second elastic body 13 and a peripheral edge division body 11. When negative pressure of the main liquid chamber 4 generated by inputting vibration to the engine mount is smaller than a predetermined value Pa, fluid is moved between the main liquid chamber 4 and the sub liquid chamber 5 only via an orifice passage when the volume of the main liquid chamber 4 changes in response to deformation of a vibration control body. While, when the negative pressure of the main liquid chamber 4 is larger than the predetermined value Pa, an auxiliary passage (a first space 13, a second space 24 and a third space 34) is opened by moving the partition member 10 to the main liquid chamber 4 side. Thus, the partition member 10 functions as a valve for opening the auxiliary passage. COPYRIGHT: (C)2009,JPO&INPIT |
