Fluid-Filled Vibration-Damping Device

Patent metadata

Field	Value
Publication number	US-2016273610-A1
Application number	US-201614994722-A
Country	US
Kind code	A1
Filing date	Jan 13, 2016
Priority date	Mar 19, 2015
Publication date	Sep 22, 2016
Grant date	—

Abstract

A fluid-filled vibration-damping device including two chambers partitioned by a partition member and mutually communicated by an orifice passage and a communication passage which is provided at the partition member, with a movable rubber film disposed in the communication passage so that each pressure of the chambers is applied to the respective face of the movable rubber film, wherein the movable rubber film includes a thick-walled outer peripheral retaining part formed at its outer rim and clamped by the partition member and reinforcing crosspieces projecting on its face and extending inward from the outer peripheral retaining part to mutually intersect, and a width dimension of at least one of the reinforcing crosspieces is made small in a vicinity of the intersection part to provide a narrow part by which the movable rubber film has a low-spring area in the vicinity of the intersection part.

First claim

What is claimed is:

1 . A fluid-filled vibration-damping device comprising:
a first mounting member; a second mounting member; a main rubber elastic body elastically connecting the first mounting member and the second mounting member; a partition member supported by the second mounting member; a pressure-receiving chamber whose wall is partially constituted by the main rubber elastic body and disposed on a first side of the partition member; an equilibrium chamber whose wall is partially constituted by a flexible film and disposed on a second side of the partition member; a non-compressible fluid sealed in the pressure-receiving chamber and the equilibrium chamber; an orifice passage communicating the pressure-receiving chamber and the equilibrium chamber with each other; a communication passage provided at the partition member to communicate the pressure-receiving chamber and the equilibrium chamber with each other; and a movable rubber film being disposed in the communication passage so that a pressure of the pressure-receiving chamber is applied to a first face of the movable rubber film and a pressure of the equilibrium chamber is applied to a second face of the movable rubber film, wherein the movable rubber film includes a thick walled outer peripheral retaining part formed at its outer rim and clamped by the partition member and a plurality of reinforcing crosspieces projecting on its face and extending inward from the outer peripheral retaining part, and the plurality of reinforcing crosspieces mutually intersect to provide an intersection part, and a width dimension of at least one of the reinforcing crosspieces is made small in a vicinity of the intersection part so as to provide a narrow part so that the movable rubber film has a low-spring area in the vicinity of the intersection part of the reinforcing crosspieces by the narrow part.

2 . The fluid-filled vibration-damping device according to claim 1 , wherein the movable rubber film further includes a thick walled center retaining part, while the plurality of reinforcing crosspieces connect the center retaining part and the outer peripheral retaining part to each other so that the plurality of reinforcing crosspieces intersect together at the center retaining part as the intersection part, and each of the reinforcing crosspieces has the narrow part at end portion thereof on a side of the center retaining part.

3 . The fluid-filled vibration-damping device according to claim 2 , wherein each of the reinforcing crosspieces extends with a straight line shape, and the plurality of reinforcing crosspieces extend outward from the center retaining part in a radial fashion to connect to the outer peripheral retaining part.

4 . The fluid-filled vibration-damping device according to claim 1 , wherein the reinforcing crosspieces gradually reduce their widths inward from the outer peripheral retaining part.

5 . The fluid-filled vibration-damping device according to claim 1 , wherein a gap is formed between a projecting edge face of each of the reinforcing crosspieces from the movable rubber film and the partition member.

Assignees

• Sumitomo Riko Co Ltd

Inventors

• Hayashi Takashi

Classifications

• F16F13/106 Primary

  Design of constituent elastomeric parts, e.g. decoupling valve elements, or of immediate abutments therefor, e.g. cages · CPC title

• F16F15/023

  using fluid means · CPC title

• F16F15/08

  with rubber springs {(grommet- or bushing-type resilient mountings F16F1/3732, F16F1/38); with springs made of rubber and metal (arrangement of internal-combustion or jet-propulsion units B60K5/12; mounting of propulsion plants on vessels B63H21/30; mounting of vehicle drivers' cabs B62D33/0604)} · CPC title

• F16F15/022 Primary

  using dampers and springs in combination · CPC title