LIQUID-FILLED ANTIVIBRATION DEVICE

PROBLEM TO BE SOLVED: To provide a liquid-filled antivibration device capable of obtaining low dynamic spring characteristics on vibration input of relatively high frequency while ensuring low dynamic spring characteristics on vibration input of relatively small amplitude and high attenuation characteristics and high dynamic spring characteristics on vibration input of relatively large amplitude.SOLUTION: An air chamber 40 is formed by mounting a membrane member 20 and a displacement regulation member 30 in a recess 14. Therefore, on vibration input of relatively small amplitude, liquid pressure increase in a first liquid chamber 10A is suppressed by elastic deformation of the membrane member 20, thereby ensuring low dynamic spring characteristics. Furthermore, on vibration input of relatively large amplitude, rigidity of the membrane member 20 is improved by displacement regulation and a fluid flowing effect is presented by an orifice of a partition member 4, thereby ensuring high attenuation characteristics/high dynamic spring characteristics. Moreover, on vibration input of relatively high frequency clogging of the orifice of the partition member 4, liquid pressure increase in the first liquid chamber 10A is suppressed by elastic deformation of the membrane member 20, thereby low dynamic spring characteristics can be obtained.