US 6,158,724 AGranted

Liquid filled vibration isolating device

AssigneeToyo Tire & Rubber Co., Ltd.

InventorsYukio Takashima, Yutaka Sadamori

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Abstract

This invention is aimed to obtain a liquid filled vibration isolating device, which is able to facilitate assembling procedure without adversely affecting shape or dimension of a caulked portion and without deteriorating mounting performance or reliability, and is able to promote vibration isolating effect both at a low frequency region and at a medium and high frequency region. To achieve this end, the vibration isolating device comprised of a rubber vibration isolating base body that connected with main-body metal fitting; and a two liquid chamber between the vibration isolating base body and a first diaphragm fixed to the main-body partitioned by a partition member and communicated with each other by an orifice; wherein the partition member is comprised of a ring-like partition-plate metal fitting that forms a first orifice, and a rubber orifice member that is attached to inner edge of partition-plate metal fitting and forms a second orifice, and an insert metal fitting butts on the rubber orifice member; and wherein one end of the second orifice is opened to the liquid chamber, other end of the second orifice is occluded by a second diaphragm; and the partition member is fixedly caulked to the main-body metal fitting along with the first diaphragm.

A liquid filled vibration isolating device comprising:

a vibration isolating base body formed of a rubber elastic body;
a first attaching metal fitting joined to one of an upper side and a lower side of the vibration isolating base body;
a main-body metal fitting in a cylindrical shape joined to the other side of the vibration isolating base body;
a first diaphragm, formed of a rubber membrane, being attached to the main-body metal fitting to oppose to the vibration isolating base body;
and
a second attaching metal fitting in a shape of a bottomed cylinder attached to the main-body metal fitting to cover the first diaphragm from outside;
wherein a liquid filled chamber, formed between the vibration isolating base body and the first diaphragm, is partitioned into two liquid chambers by a partition member, while the two liquid chambers are communicated with each other by an orifice in the partition member;
wherein the partition member comprises:
a ring-shaped partition-plate metal fitting, disposed between the vibration isolating base body and the first diaphragm, being connected with the inner face of main-body metal fitting, and having a first orifice communicating the two liquid chambers with each other, at an outer peripheral portion of the partition-plate metal fitting;
a rubber orifice member, formed of a rubber elastic body, attached to an inner edge of the partition-plate metal fitting;
and
an insert metal fitting, fixed to the partition-plate metal fitting, being connected with a first-diaphragm-facing face of the rubber orifice member;
wherein the rubber orifice member has a second orifice which faces the insert metal fitting;
one end of the second orifice is opened to either of the one liquid chamber on the vibration isolating base body and the other liquid chamber on the first diaphragm;
other end of the second orifice is occluded by a second diaphragm formed of a rubber membrane;
and the partition member is fixedly caulked to the main-body metal fitting along with the first diaphragm and the second attaching metal fitting.

13 more elements

Facts

Application

09/257,422Filed 25 Feb 1999

Priority

JP 10-24601931 Aug 1998

Granted

12 Dec 2000

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

F16F 13/105
The wall being at least in part formed by a flexible membrane or the like: characterised by features of partitions between two working chambers
F16F 13/103
The wall being at least in part formed by a flexible membrane or the like: characterised by method of assembly, production or treatment
F16F 13/18
The plastics spring forming at least a part of the wall of the fluid chamber of the damper: characterised by the location or the shape of the…
F16F 13/20
The damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper: characterised by…

Abstract

Claims5