| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid sealing isolation device which an easily adjust rigidity of a diaphragm and provide a resonance peak in a high frequency area while increasing a sectional area and decreasing length of a second orifice passage. SOLUTION: First and second orifice divided halves 14, 15 are attached to circumferential grooves of a rubber elastic body 1 arranged around an inner cylinder 2. A first balance chamber 28 surrounding the side part of the inner cylinder 2, a first pressure receiving chamber 29 on a lower side of the inner cylinder 2, and a second pressure receiving chamber 30 on the lower side of a rubber elastic partition wall 11 are arranged in a layered manner. An outer cylinder 31 is fittingly attached to the outermost surface. A first orifice passage 32 which communicates the first balance chamber 28 with the first pressure receiving chamber 29, while a second orifice passage 33 is communicated with the second pressure receiving chamber 29 and the second balance chamber 34 lead to the second orifice passage 33. The passages 32, 33, and the chamber 34 are circularly arranged. A diaphragm 36 recessed inward is attached to a portion of the outer cylinder 31, opposed to the second balance chamber 34. It is thus possible to attain vibration isolation in a high frequency area (100 Hz or more) by a second resonance system from the second pressure receiving chamber 30 to the second balance chamber 34. |
