US 6,669,181 B2Granted

Vibration isolating apparatus

AssigneesBridgestone Corporation, Nissan Motor Co., Ltd.

InventorsKatsumi Someya, Shigeki Okai

Life of this patent

Estimating the term…

Loading patent…

Abstract

The vibration isolating apparatus includes, an outer tube, an inner tube disposed at an inner peripheral side of the outer tube, an elastic body disposed between the outer tube and the inner tube, a main fluid chamber which contains a fluid with the elastic body serving as a portion of a partitioning wall of the main fluid chamber and whose internal volume changes due to deformation of the elastic body, a first auxiliary fluid chamber which contains a fluid and a portion of a partitioning wall of the first auxiliary fluid chamber is formed by a diaphragm so as to expand and contract a space between the first auxiliary fluid chamber and the outer tube, a first passage which communicates the main fluid chamber and the first auxiliary fluid chamber, and a second passage which communicates the main fluid chamber and the first auxiliary fluid chamber.

Claims20

Dependent claims

A vibration isolating apparatus comprising:

an outer tube which is tubular and which is connected to one of a vibration generating portion and a vibration receiving portion;
an inner tube which is disposed at an inner peripheral side of the outer tube and which is connected to another of the vibration generating portion and the vibration receiving portion;
an elastic body which is disposed between the outer tube and the inner tube and is elastically deformable;
a main fluid chamber which contains a fluid with the elastic body serving as a portion of a partitioning wall of the main fluid chamber, and whose internal volume changes due to deformation of the elastic body;
a first auxiliary fluid chamber which contains a fluid, at least a portion of a partitioning wall of the first auxiliary fluid chamber being elastically deformable;
a diaphragm forming a portion of the elastically deformable partitioning wall of the first auxiliary fluid chamber, so as to expand and contract a space between the first auxiliary fluid chamber and the outer tube;
a first passage which communicates the main fluid chamber and the first auxiliary fluid chamber;
and
a second passage which communicates the main fluid chamber and the first auxiliary fluid chamber, a passage sectional area of at least a portion of the second passage being smaller than a passage sectional area of the first passage, and a flow resistance of the second passage being smaller than a flow resistance of the first passage,
wherein in a state in which internal pressure of the first auxiliary fluid chamber is low and there is little fluid within the first auxiliary fluid chamber, the diaphragm has a configuration which is sunk toward the first auxiliary fluid chamber, and in a state in which the internal pressure of the first auxiliary fluid chamber is high and there is much fluid in the first auxiliary fluid chamber, the diaphragm has a swollen configuration, and
as the internal pressure of the first auxiliary fluid chamber rises and fluid flows into the first auxiliary fluid chamber, the diaphragm inverts and deforms into the swollen configuration.

8 more elements

A vibration isolating apparatus comprising:

an outer tube which is tubular and which is connected to one of an engine and a vehicle body;
an inner tube which is disposed at an inner peripheral side of the outer tube and which is connected to another of the engine and the vehicle body;
an elastic body which is disposed between the outer tube and the inner tube and is elastically deformable;
a main fluid chamber which contains a fluid with the elastic body serving as a portion of a partitioning wall of the main fluid chamber, and whose internal volume changes due to deformation of the elastic body;
a first auxiliary fluid chamber which contains a fluid, at least a portion of a partitioning wall of the first auxiliary fluid chamber being elastically deformable;
a diaphragm forming a portion of the elastically deformable partitioning wall of the first auxiliary fluid chamber, so as to expand and contract a space between the first auxiliary fluid chamber and the outer tube;
a first passage which communicates the main fluid chamber and the first auxiliary fluid chamber;
and
a second passage which communicates the main fluid chamber and the first auxiliary fluid chamber, a passage sectional area of at least a portion of the second passage being smaller than a passage sectional area of the first passage, and a flow resistance of the second passage being smaller than a flow resistance of the first passage,
wherein in a state in which internal pressure of the first auxiliary fluid chamber is low and there is little fluid within the first auxiliary fluid chamber, the diaphragm has a configuration which is sunk toward the first auxiliary fluid chamber, and in a state in which the internal pressure of the first auxiliary fluid chamber is high and there is much fluid in the first auxiliary fluid chamber, the diaphragm has a swollen configuration, and
as the internal pressure of the first auxiliary fluid chamber rises and fluid flows into the first auxiliary fluid chamber, the diaphragm inverts and deforms into the swollen configuration.

8 more elements

Dependencies are inferred from the claim text.