# US 9,518,628 B2 · Tubular vibration-damping device

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- Number: US 9,518,628 B2
- Document ID: US9518628B2
- Status: Granted
- Kind: B2
- Application number: 14/805,839
- Filed: 2015-07-22
- Published: 2015-11-12
- Granted: 2016-12-13
- Earliest claimed: 2013-09-24
- Assignees: Sumitomo Riko Company Limited
- Applicants: Sumitomo Riko Company Limited
- Inventors: Yuki Yahata
- Web page: https://patentgrep.com/patent/US9518628B2

## CPC

- F16F 1/38: with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin {, i.e. bushing-type (hydraulically-damped bushes F16F13/14; suppression of vibrations in rotating systems by making use of elastomeric spring members between rotating elements, driveline torque being transmitted therebetween F16F15/126, by making use of a dynamic damping mass attached to a rotating element by means of elastomeric springs F16F15/14; pivots per se F16C11/00; elastic or yielding bearings or bearing supports F16C27/00; parts of sliding-contact bearings, e.g. bushes F16C33/04)}
- B60G 7/006: {Attaching arms to sprung or unsprung part of vehicle, characterised by comprising attachment means controlled by an external actuator, e.g. a fluid or electrical motor (B62D7/146 takes precedence)}
- B60G 11/22: having rubber springs only {(B60G11/006 takes precedence)}
- F16F 1/3814: {characterised by adaptations to counter axial forces (F16F1/393 takes precedence)}
- F16F 1/3828: {End stop features or buffering (F16F1/3807 takes precedence)}
- F16F 1/3842: {Method of assembly, production or treatment; Mounting thereof (supports for pipes, cables or protective tubing F16L3/00)}
- B60G 2204/41: Elastic mounts, e.g. bushings
- F16F 2224/02: solids
- F16F 2230/0005: Attachment, e.g. to facilitate mounting onto confer adjustability
- F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- B60G: VEHICLE SUSPENSION ARRANGEMENTS (air-cushion vehicles B60V; {cycle suspensions B62K25/00})

## Abstract

A tubular vibration-damping device including: an inner shaft member; an outer tube member; and a main rubber elastic body which couples the two members. The outer tube member is made of synthetic resin and integrally includes on its first axial end a locking part having a locking projection on its outer circumference surface and a stopper support part that supports a base end part of a stopper rubber projecting axially outward therefrom. The locking part is positioned at an outer circumference side of the stopper support part across a recess that opens axially outward of the outer tube member. Deformation of the locking part to an inner circumference side is restricted by the stopper rubber swelling to the outer circumference side along with its compressive deformation in an axial direction and abutting against an inner circumference surface of the locking part.

## Claims

### Claim 1

A tubular vibration-damping device comprising:
an inner shaft member;
an outer tube member; and
a main rubber elastic body coupling the inner shaft member and the outer tube member, wherein
the outer tube member is made of synthetic resin,
the outer tube member integrally includes on its first axial end a locking part having a locking projection on its outer circumference surface and a stopper support part that supports a base end part of a stopper rubber projecting axially outward therefrom,
the locking part is positioned at an outer circumference side of the stopper support part across a recess that opens axially outward of the outer tube member, and
deformation of the locking part to an inner circumference side is restricted by the stopper rubber swelling to the outer circumference side along with its compressive deformation in an axial direction and abutting against an inner circumference surface of the locking part.

### Claim 2 (depends on 1)

The tubular vibration-damping device according to claim 1, wherein an outer circumference surface of the stopper support part is an inclined surface gradually expanding to the outer circumference side from a tip end side to a base end side in the axial direction.

### Claim 3 (depends on 1)

The tubular vibration-damping device according to claim 1, wherein at a bottom part of the recess, an abutting rubber is provided between facing surfaces of an outer circumference surface of the stopper support part and the inner circumference surface of the locking part, and a base end part of the locking part is elastically coupled to the stopper support part via the abutting rubber.

### Claim 4 (depends on 1)

The tubular vibration-damping device according to claim 1, wherein the stopper rubber fixed to an axially tip end surface of the stopper support part integrally includes a covering rubber layer expanding over an outer circumference surface of the stopper support part.

### Claim 5 (depends on 1)

The tubular vibration-damping device according to claim 1, wherein the outer tube member is made thicker to the inner circumference side at its first axial end side so as to form the stopper support part.

### Claim 6 (depends on 1)

The tubular vibration-damping device according to claim 1, wherein the outer tube member further includes on its second axial end a flange part that expands to the outer circumference side, and another stopper rubber that projects axially outward from the flange part is provided.