# US 10,309,477 B2 · Tubular vibration-damping device having bracket

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- Number: US 10,309,477 B2
- Document ID: US10309477B2
- Status: Granted
- Kind: B2
- Application number: 15/480,762
- Filed: 2017-04-06
- Published: 2017-07-27
- Granted: 2019-06-04
- Earliest claimed: 2015-09-30
- Assignees: Sumitomo Riko Company Limited
- Applicants: Sumitomo Riko Company Limited
- Inventors: Yasuhiro Komiya
- Web page: https://patentgrep.com/patent/US10309477B2

## 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)}
- F16F 1/3814: {characterised by adaptations to counter axial forces (F16F1/393 takes precedence)}
- F16F 1/3863: {characterised by the rigid sleeves or pin, e.g. of non-circular cross-section (F16F1/3807, F16F1/387 take precedence)}
- B60G 11/22: having rubber springs only {(B60G11/006 takes precedence)}
- B60G 2204/128: Damper mount on vehicle body or chassis
- B60G 2204/41: Elastic mounts, e.g. bushings
- B60K 5/1208: {Resilient supports (B60K5/1241 - B60K5/1291 take precedence)}
- F16F 2224/0208: Alloys
- F16F 2224/0241: Fibre-reinforced plastics [FRP]
- F16F 2224/025: Elastomers
- F16F 2226/045: Press-fitting
- F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- B60G: VEHICLE SUSPENSION ARRANGEMENTS (air-cushion vehicles B60V; {cycle suspensions B62K25/00})
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES

## Abstract

A tubular vibration-damping device having a bracket including a tubular vibration-damping device press-fitted and attached into a tubular bracket, the tubular vibration-damping device including an inner shaft member, an outer tube member made of synthetic resin and disposed on an outer peripheral side of the inner shaft member, and a main rubber elastic body connecting the inner shaft member and the outer tube member. An inside projection is integrally formed with the outer tube member so as to project radially inwardly. A gap is provided between an outer peripheral surface of the outer tube member and an inner peripheral surface of the tubular bracket at a position in a peripheral wall part of the outer tube member where the inside projection is formed.

## Claims

### Claim 1

A damping device comprising
a tubular vibration-damping device press-fitted and attached into a tubular bracket, the tubular vibration-damping device including an inner shaft member, an outer tube member made of synthetic resin and disposed on an outer peripheral side of the inner shaft member, and a main rubber elastic body connecting the inner shaft member and the outer tube member, wherein
an inside projection is integrally formed with the outer tube member so as to project radially inwardly,
a gap is provided between an outer peripheral surface of the outer tube member and an inner peripheral surface of the tubular bracket at a position in a peripheral wall part of the outer tube member where the inside projection is formed,
the inside projection is formed continuously about an entire circumference of the outer tube member in a circumferential direction,
the inner shaft member includes a small-diameter tubular portion located at one axial side thereof, a large-diameter tubular portion located at another axial side thereof, and a tapered surface located at an axially middle portion thereof with a diameter of the tapered surface decreasing from the large-diameter tubular portion toward the small-diameter tubular portion, and
with the inner shaft member and the outer tube member being elastically connected by the main rubber elastic body, an end face of the small-diameter tubular portion is located between a first axial end of the outer tube member and a second axial end of the outer tube member so that the tapered surface of the inner shaft member and a lower end face of the inside projection of the outer tube member are situated in opposition to each other in an inclined axial direction via the main rubber elastic body.

### Claim 2 (depends on 1)

The tubular vibration-damping device according to claim 1, wherein at the first axial end of the outer tube member, the inside projection is integrally formed while an outside projection is integrally formed so as to project to the outer peripheral side.

### Claim 3 (depends on 1)

The tubular vibration-damping device according to claim 1, wherein an escape part is provided on the inner peripheral surface of the tubular bracket so as to be remote from the outer peripheral surface of the outer tube member to the outer peripheral side and form the gap.

### Claim 4 (depends on 1)

The tubular vibration-damping device according to claim 1, wherein a thick part, which is made thick radially outwardly, is provided to the tubular bracket at a portion located radially outward of the inside projection of the outer tube member.

### Claim 5 (depends on 1)

The tubular vibration-damping device according to claim 1, wherein the tubular bracket is made of either one of an aluminum alloy and a fiber-reinforced resin.