| 摘要 |
PURPOSE:To prevent transmission of vibration throughout a wide range through simple and compact structure. CONSTITUTION:A main liquid chamber A is formed in a rubber resilient body 1 and auxiliary liquid chambers B and C communicated to the main liquid chamber through flow passages 41 and 51 and having rubber diaphragms 2 and 3 forming a chamber wall are formed. A pressure chamber 61 is formed below the rubber membrane 3 and selectively connected to the open air and a negative pressure source 73 by means of a three-way solenoid valve 72. The flow passage 51 is formed in an inner cylinder 52 in which a pressure receiving plate 55 is located and the inner cylinder 52 is resiliently supported in an outer cylinder 53 by means of a rubber resilient body 54. During input of idling vibration, a pressure chamber 61 is communicated to the open air and the rubber membrane 3 is freely deformed and vibration absorption is effected through liquid resonance in the flow passage 51. During input of shake vibration, the pressure chamber 61 is brought into a negative pressure state and free deformation of the rubber diaphragm 3 is regulated, and vibration is damped through liquid resonance in the flow passage 41 communicated to the auxiliary chamber B. During input of frequency microvibration during running, the resiliently supported pressure receiving plate effects resonance vibration to absorb vibration. |
