Fluid-filled vibration damping device

Patent metadata

Field	Value
Publication number	US-10828975-B2
Application number	US-201916270920-A
Country	US
Kind code	B2
Filing date	Feb 8, 2019
Priority date	Jul 7, 2017
Publication date	Nov 10, 2020
Grant date	Nov 10, 2020

Abstract

A fluid-filled vibration damping device including an inner member, an outer member having a tubular part whose radially inner surface has a quadrangular tube shape, a main rubber elastic body elastically connecting the two members, and a partition having a quadrangular plate shape disposed on a radially inner side of the tubular part. An outer peripheral surface of an axial end of the main rubber elastic body is anchored to the radially inner surface of the tubular part. An annular sealing rubber pressed against an outer peripheral edge of an axial end face of the partition is provided to the axial end of the main rubber elastic body. An axis-perpendicular inside dimension and a width dimension of the sealing rubber are made larger in a diagonal direction of the radially inner surface of the tubular part than in an opposite side direction thereof.

First claim

What is claimed is:

1. A fluid-filled vibration damping device comprising:
an inner member;
an outer member including a tubular part;
a main rubber elastic body elastically connecting the inner member and the outer member to each other;
a partition disposed on a radially inner side of the tubular part of the outer member;
a primary liquid chamber and an auxiliary liquid chamber formed on opposite sides of the partition, the primary liquid chamber and the auxiliary liquid chamber being filled with a non-compressible fluid; and
an orifice passage through which the primary liquid chamber and the auxiliary liquid chamber communicate with each other, the orifice passage being formed in the partition, wherein
a radially inner surface of the tubular part of the outer member has a quadrangular tube shape,
the partition has a quadrangular plate shape corresponding to the radially inner surface of the tubular part, and is disposed on the radially inner side of the tubular part,
an outer peripheral surface of an axial end portion of the main rubber elastic body is anchored to the radially inner surface of the tubular part,
an annular sealing rubber pressed against an outer peripheral edge of an axial end face of the partition is provided to the axial end portion of the main rubber elastic body,
in a cross-section perpendicular to an axis of the sealing rubber, (i) an inside dimension (D) in a diagonal direction of the radially inner surface of the tubular part is larger than (ii) an inside dimension (d) in a direction intersecting two sides of the radially inner surface of the tubular part that are opposite to one another, and
in the cross-section, (i) a width dimension (W) of the sealing rubber in the diagonal direction of the radially inner surface of the tubular part is larger than (ii) a width dimension (w) of the sealing rubber in the direction intersecting the two sides of the radially inner surface of the tubular part that are opposite to one another.

2. The fluid-filled vibration damping device according to claim 1 , wherein a corner of the radially inner surface of the tubular part has an arcuate curved surface, and a corner of a radially inner surface of the sealing rubber positioned in the diagonal direction of the radially inner surface of the tubular part has an arcuate curved surface whose curvature radius is larger than that of the corner of the radially inner surface of the tubular part.

3. The fluid-filled vibration damping device according to claim 1 , wherein a portion of the sealing rubber of the main rubber elastic body, the portion being positioned on the radially inner side of a side of the radially inner surface of the tubular part, extends in a circumferential direction with a substantially constant width dimension.

4. The fluid-filled vibration damping device according to claim 1 , wherein
a press-sealing face positioned on the outer peripheral edge of the axial end face of the partition is pressed against an axial end face of the sealing rubber of the main rubber elastic body, and
a seal rib protruding axially outward from the press-sealing face of the partition is more strongly pressed against the axial end face of the sealing rubber such that a fluid-tight sealing is provided axially between the sealing rubber and the partition.

5. The fluid-filled vibration damping device according to claim 4 , wherein
the outer member includes an inner flange-shaped part protruding inward from the tubular part, and at least a portion of the press-sealing face of the partition is disposed in opposition to the inner flange-shaped part in an axial direction,
the sealing rubber of the main rubber elastic body is anchored to a face of the inner flange-shaped part opposed to the press-sealing face such that the sealing rubber is arranged axially between the press-sealing face and the inner flange-shaped part, and
the seal rib of the partition is formed on a portion of the press-sealing face opposed to the inner flange-shaped part.

6. The fluid-filled vibration damping device according to claim 4 , wherein
the outer member includes a stepped face on the radially inner surface of the tubular part,
the radially inner surface of the tubular part on a first axial side of the stepped face comprises a rubber anchoring face to which the outer peripheral surface of the axial end portion of the main rubber elastic body is anchored, while the radially inner surface of the tubular part on a second axial side of the stepped face comprises a partition mounting face in which the partition is arranged in an inserted state, and
the axial end portion of the main rubber elastic body anchored to the rubber anchoring face and the stepped face includes the sealing rubber protruding further inward than the stepped face.

Assignees

• Sumitomo Riko Co Ltd

Inventors

• Tanaka Shingo
• Komiya Yasuhiro
• Hayashi Takashi

Classifications

• F16F13/103 Primary

  characterised by method of assembly, production or treatment · CPC title

• B60K5/12

  Arrangement of engine supports · CPC title

• B60K5/1225

  comprising resilient rings surrounding a part of the unit · CPC title

• F16F2230/30

  Sealing arrangements · CPC title

• B60K5/1208 Primary

  Resilient supports (B60K5/1241 - B60K5/1291 take precedence) · CPC title