| 摘要 |
PURPOSE:To provide a vibration-proof device surely absorbing both the low-frequency vibration and the high-frequency vibration. CONSTITUTION:An inner tube 14 is arranged in an outer tube 18, and an elastic body 16 is suspended. A circular recess 20 is formed on the elastic body 16, the circular recess 20 is partitioned into three chambers by an upper bulkhead 22 and a lower bulkhead 24 to form a main liquid chamber 30, the second auxiliary liquid chamber 38, and the first auxiliary liquid chamber 42 in sequence from above. The upper bulkhead 22 is provided with a cylinder section 28 on the inner periphery of a circular plate 26, and the second communicating path 32 is formed between it and the inner tube 14 of the cylinder section 28. The lower bulkhead 24 is provided with a cylinder section 36 on the inner periphery of a circular plate 34, and the first communicating path 40 is formed between it and the inner tube 14 of the cylinder section 36. A small diaphragm 46 with high rigidity is provided on the outer tube 18 for the second auxiliary liquid chamber 38, and a large diaphragm 50 with low rigidity is provided for the first auxiliary liquid chamber 42. A liquid is liquid column-resonated in the second communicating path 32 and the first communicating path 40 for the low-frequency vibration, the liquid is liquid column-resonated in the second communicating path 32 for the high-frequency vibration, and the dynamic spring constant is reduced. |
