| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To obtain a vibration-proofing device which damps vibrations over a wide range of frequencies. <P>SOLUTION: A middle tube 20 is fitted into the inner circumferential surface of an outer tubular metal fitting 16 and then a mounting metal member 18 and the middle tube 20 are coupled elastically by a rubber elastomer 22. There is a first pressure receiving liquid chamber 30 between a depression 22A down the rubber elastomer 22 and a partition member 24. A hallow portion 22B formed in the rubber elastomer 22 is closed by the inner circumferential surface of the middle tube 20 to act as a second pressure receiving liquid chamber 32. The lower part of the outer tubular metal fitting 16 includes a sub liquid chamber 36 zoned from outside by a diaphragm 48 and the partition member 24. Via a first orifice 38, the first pressure receiving liquid chamber 30 and the sub liquid chamber 36 are allowed to communicate with each other, while via a second orifice 40, a second pressure receiving liquid chamber 32 and the sub liquid chamber 36 are allowed to communicate with each other. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
