Vibration damper incorporating oscillating means for generating oscillating force for relative displacement of first and second mass assemblies

摘要

A vibration damper including a mounting member fixed to a subject body whose vibration is to be damped, a first mass assembly disposed such that the first mass assembly is displaceable relative to the mounting member in a direction of vibration of the subject body, a first elastic member elastically connecting the first mass assembly to the mounting member, a second mass assembly disposed such that the second mass assembly is displaceable relative to the mounting member and the first mass assembly in the direction of vibration, a second elastic member elastically connecting the second mass assembly to the mounting member, and an oscillating device for generating an oscillating force acting on the first and second mass assemblies so as to cause relative displacement therebetween.