Patent ID: 6158724
Filing Date: 2000-12-12
Classification: F16F

Abstract:
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; anda 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; andan 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.