| 摘要 |
PURPOSE:To absorb vibration over a wide range of frequency by providing an elastic body, a pressure liquid chamber, and a first sub-liquid chamber between an inner cylinder and an outer cylinder, by providing a second sub-liquid chamber on the reverse side through the inner cylinder, and by communicating the pressure liquid chamber and the first and second sub-liquid chambers with each other. CONSTITUTION:An elastic body 22 and a thin film elastic body 24 are provided between an inner cylinder 12 and an outer cylinder 14, while a bulkhead 28 and a thin film elastic body 32 are further provided so as to form a main liquid chamber (pressure liquid chamber) 34, and sub-liquid chambers 36, 38. The main liquid chamber 34 and the sub-liquid chamber 38 are communicated with each other through a communicating route 42, while the main liquid chamber 34 and the sub-liquid chamber 36 are communicated with each other through another communication route of the resistance larger than that of the communication route 42. The vibration is transmitted from the inner cylinder 12 to the main liquid chamber 34, and is absorbed by the elastic body 22, and in the case of low frequency, the pressure variation is transmitted from the main liquid chamber 34 to the sub-liquid chamber 36, and the vibration is absorbed by the communication route due to liquid column resonance. In the case of high frequency, the thin film elastic body 24 is deformed, and a resonance of liquid is generated in the communication route 42, and the elevation of a dynamic spring constant is suppressed thereby. The vibration is thus absorbed over frequencies in a wide range. |
