Bridgestone Corporation

Akio Shimamura

Hiroshi Kojima

Kazuya Ogawa

Michihiro Orikawa

The present invention is an anti-vibration device () that includes: a first mounting component () that is cylindrically-shaped and joined to one of a vibration generating portion and a vibration receiving portion; a second mounting component () that is joined to the other one of the vibration generating portion and the vibration receiving portion; a first elastic body () that elastically joins the first mounting component () and the second mounting component () together; a fluid chamber () that is provided inside the first mounting component () and inside which a fluid is sealed; a first partitioning wall () that divides the fluid chamber () in an axial direction so as to define a main fluid chamber (), a portion of wall surfaces of which is the first elastic body, and an auxiliary fluid chamber; a second partitioning wall () that divides the main fluid chamber () in a circumferential direction so as to define a plurality of divided main fluid chambers (); and a plurality of restricting passages () that enable the plurality of divided main fluid chambers (A,B) and the auxiliary fluid chamber () to communicate with each other, wherein at least a portion of the first partitioning wall () is formed by a second elastic body () that is elastically deformable, the second partitioning wall () is joined to both the second mounting component () and the second elastic body (), and the second elastic body () has differences in rigidity in a radial direction.

Anti-vibration device

Provided is a vibration isolation device including: a first attachment member formed in a tubular shape; a second attachment member disposed at the inner peripheral side of the first attachment member; a resilient body coupled to the first attachment member and the second attachment member; a partitioning member configuring a first main liquid chamber between the partitioning member and the resilient body; a diaphragm member configuring an auxiliary liquid chamber between the diaphragm member and the partitioning member; a first restricting through path enabling liquid to move between the first main liquid chamber and the auxiliary liquid chamber; a recess portion provided to the resilient body and configuring a liquid chamber between the recess portion and the first attachment member; a separating wall sectioning the liquid chamber into a plurality of second main liquid chambers; a second restricting through path; and pressure difference reduction portion.

Vibration isolation device

A vibration absorption that is both capable of damping vibrations in two directions and high in durability. A pair of pressure receiving chambers (A) and (B) at symmetrical positions sandwiching an axis S are structured between a first rubber elastic body () and a second rubber elastic body (). The shape of a first rubber elastic body () in an unloaded state is determined such that a region between an inner side joining portion (B) and an outer side joining portion (A) becomes substantially horizontal in a loaded state in which the first rubber elastic body () supports the weight of an engine.

Growing community of inventors

Yokohama, Japan

Akio Shimamura