Liquid filled type vibration isolator

摘要

There is provided a liquid filled type vibration isolator in which damping action for both engine idling vibration and engine shake is carried out with the use of a single orifice. In the liquid filled type vibration isolator comprising a rubber-like insulator (8) for absorbing and isolating vibration transmitted from an oscillating body, a main chamber (6) having a chamber wall formed by a part of the insulator, and hermetically charged therein with liquid, an auxiliary chamber (7) connected to the main chamber through the intermediary of an orifice (5) and having a chamber wall a part of which is formed by a first diaphragm (41), a partition member (3) partitioning between the main chamber and the auxiliary chamber, a working chamber (1) defined and formed with respect to the main chamber by means of a second diaphragm (2), wherein the second diaphragm has a deforming stiffness which is higher than that of the first diaphragm. The liquid in the orifice effects resonant oscillation with a vibration input during engine idling operation. <IMAGE>