Vibration damper having oscillating force generating means

摘要

A vibration damper comprising: a mounting member (10) secured to a subject body; a first mass member (35) which is displaceable relative to the mounting member in a direction of an input vibration of the subject body; a first elastic member (18) elastically connecting the first mass member to the mounting member; a second mass member (52) which is displaceable relative to the mounting member and the first mass member in the direction of the input vibration of the subject body; a second elastic member (48) elastically connecting the second mass member to the first mass member; means (24, 32, 36) for generating an oscillating force as a force of relative displacement between the first mass member and the second mass member in the direction of the input vibration of the subject body; and a fluid chamber (62) filled with a non-compressible fluid, the fluid chamber being partially defined by the first elastic body and the second elastic body and disposed between the mounting member and the second mass member. <IMAGE>