| 摘要 |
PROBLEM TO BE SOLVED: To provide a vibration control device capable of reducing three kinds of vibration having different amplitudes and frequencies. SOLUTION: This vibration control device is equipped with a main liquid chamber 17 having an elastic body 6 as a part of a barrier plate, in which liquid is enclosed and the inside capacity of which varies by the deformation of the elastic body, a first auxiliary liquid chamber 22 in which liquid is enclosed, at least a part of the barrier plate is formed of a first diaphragm 11 to make it expandable and contractible, a first orifice 26 to make the main liquid chamber communicate with the first auxiliary liquid chamber, a second auxiliary liquid chamber 23 in which liquid is enclosed and at least a part of the barrier plate is formed of a second diaphragm 16 to make it expandable and contractible, a second orifice 28 to make the first auxiliary liquid chamber communicate with the second auxiliary liquid chamber, a movable membrane 21 housed by a support frame provided in a partition member 19 to separate the main liquid chamber from the auxiliary liquid chamber so that it can rock in its thickness direction, and a switching member 35 to switch the state of the second diaphragm so that it can be deformed and it cannot be deformed. COPYRIGHT: (C)2008,JPO&INPIT |
