Tubular vibration-damping device

Patent metadata

Field	Value
Publication number	US-12253135-B2
Application number	US-202217989800-A
Country	US
Kind code	B2
Filing date	Nov 18, 2022
Priority date	Mar 18, 2022
Publication date	Mar 18, 2025
Grant date	Mar 18, 2025

Abstract

A tubular vibration-damping device including an inner shaft member and an outer tube member connected by a main rubber elastic body. The outer tube member is configured to be slidably inserted in an attachment tube in an axial direction, and is circumferentially divided so as to be radially deformable or displaceable. A pair of tighteners are disposed on axially opposite sides of the main rubber elastic body. The main rubber elastic body is fastened to an inner circumferential surface of the outer tube member. An adjustment elastic body against which the tighteners are pressed is integrally formed with axially opposite side portions of the main rubber elastic body. Sliding resistance in the axial direction between an outer circumferential surface of the outer tube member and an inner circumferential surface of the attachment tube is settable depending on a pressing force of the tighteners against the adjustment elastic body.

First claim

What is claimed is:

1. A tubular vibration-damping device comprising an inner shaft member and an outer tube member connected by a main rubber elastic body, the outer tube member being configured to be attached to an attachment tube in an inserted state where the outer tube member is slidable in an axial direction, wherein
the outer tube member is divided at least at a part in a circumferential direction and is deformable or displaceable in a radial direction,
a pair of tighteners are disposed on axially opposite sides of the main rubber elastic body,
the main rubber elastic body is fastened to an inner circumferential surface of the outer tube member,
an adjustment elastic body against which the pair of the tighteners are pressed is integrally formed with axially opposite side portions of the main rubber elastic body, and
sliding resistance in the axial direction between an outer circumferential surface of the outer tube member and an inner circumferential surface of the attachment tube is settable depending on a pressing force of the pair of the tighteners against the adjustment elastic body.

2. The tubular vibration-damping device according to claim 1 , wherein
the pair of the tighteners are opposed to the outer tube member in the axial direction,
the adjustment elastic body is disposed on an opposed face of the outer tube member that is opposed to each of the pair of the tighteners in the axial direction, and
the main rubber elastic body and the adjustment elastic body are integrally formed on an inner circumference of the outer tube member by being integrally connected by a connecting rubber.

3. The tubular vibration-damping device according to claim 2 , wherein
the outer tube member has a groove-shaped cross section that opens radially inward, and the outer tube member includes a peripheral wall part extending in the axial direction and a pair of support parts projecting radially inward from axially opposite ends of the peripheral wall part,
the adjustment elastic body is fastened to an axially outer face of each of the pair of the support parts, and
an inside of the outer tube member surrounded by the peripheral wall part and the pair of the support parts is filled with the main rubber elastic body.

4. The tubular vibration-damping device according to claim 1 , wherein
the pair of the tighteners have an annular-plate shape, and
a radially inner portion of the pair of the tighteners includes a positioning part that is positioned with respect to the inner shaft member in the axial direction.

5. The tubular vibration-damping device according to claim 4 , wherein
the inner shaft member includes a regulating part that is disposed between axially opposed faces of the pair of the tighteners and regulates a distance between the axially opposed faces of the pair of the tighteners, and
a contact portion of the pair of the tighteners that is held in contact with the regulating part constitutes the positioning part.

6. The tubular vibration-damping device according to claim 4 , wherein
the positioning part of the pair of the tighteners is constituted by an inner contact part that is held in contact with the inner shaft member from an axially outer side,
a radially outer portion of the pair of the tighteners includes an elastic body contact part that is held in contact with the adjustment elastic body from the axially outer side, and
an axial position of a contact face of the inner contact part of the pair of the tighteners that is held in contact with the inner shaft member and an axial position of a contact face of the elastic body contact part that is held in contact with the adjustment elastic body are different from each other.

7. The tubular vibration-damping device according to claim 1 , further comprising a tubular body configured to be fixedly mounted onto a component subject to vibration damping linkage and constitute the attachment tube, wherein
the outer tube member is attached to the tubular body in the inserted state where the outer tube member is slidable in the axial direction, and
a detent part configured to limit an amount of movement of the outer tube member due to a slide in the axial direction with respect to the tubular body is provided.

Assignees

• Sumitomo Riko Co Ltd

Inventors

• Hirano Masaaki
• Kume Takashi

Classifications

• F16F1/3842

  Method of assembly, production or treatment; Mounting thereof (supports for pipes, cables or protective tubing F16L3/00) · CPC title

• F16F2224/025

  Elastomers · CPC title

• F16F2228/06

  Stiffness · CPC title

• F16F1/3828

  End stop features or buffering (F16F1/3807 takes precedence) · CPC title

• F16F7/09

  in dampers of the cylinder-and-piston type · CPC title