Vibration damping device

Patent metadata

Field	Value
Publication number	US-10794446-B2
Application number	US-201816168979-A
Country	US
Kind code	B2
Filing date	Oct 24, 2018
Priority date	Mar 12, 2018
Publication date	Oct 6, 2020
Grant date	Oct 6, 2020

Abstract

A vibration damping device including a main rubber elastic body elastically connecting first and second mounting members. An upper portion of the main rubber elastic body constitutes a small-diameter portion to which the first mounting member is bonded, while a lower portion thereof constitutes a large-diameter portion to which the second mounting member is bonded. The first mounting member includes an inner recess opening onto an outer circumferential surface thereof, and the small-diameter portion of the main rubber elastic body is bonded to the inner recess. The main rubber elastic body has an outside diameter dimension made larger at a portion bonded to the inner recess than an outside diameter dimension of the first mounting member at a lower side than the inner recess such that the small-diameter portion of the main rubber elastic body is thick-walled by being bonded to the inner recess.

First claim

What is claimed is:

1. A vibration damping device comprising:
a first mounting member;
a second mounting member; and
a main rubber elastic body elastically connecting the first and second mounting members, an upper portion of the main rubber elastic body serving as a small-diameter portion to which the first mounting member is bonded, and a lower portion of the main rubber elastic body serving as a large-diameter portion to which the second mounting member is bonded, wherein:
the first mounting member includes:
an inner recess opening onto an outer circumferential surface thereof, and
a flanged part above the inner recess in an axial direction of the vibration damping device,

the small-diameter portion of the main rubber elastic body is bonded to the inner recess,
the main rubber elastic body has an outside diameter dimension made larger at a portion bonded to the inner recess than an outside diameter dimension of the first mounting member at a side lower than the inner recess such that the small-diameter portion of the main rubber elastic body is thick-walled by being bonded to the inner recess,
the main rubber elastic body directly connects opposed faces of an outer circumferential surface of the inner recess and an inner circumferential surface of the second mounting member,
the inner recess includes a deepest part having a maximum depth dimension, and the deepest part includes a curved surface of a concave shape opening radially outward,
the inner recess includes a tapered face inclining radially outward from the deepest part toward opposite sides in the axial direction of the vibration damping device,
the deepest part of the inner recess forms a smallest outer diameter of the first mounting member, and
the flanged part forms a largest outer diameter of the first mounting member.

2. The vibration damping device according to claim 1 , wherein a lower face of the first mounting member is covered by the large-diameter portion of the main rubber elastic body.

3. The vibration damping device according to claim 1 , wherein the inner recess is provided continuously about an entire circumference of the first mounting member.

4. A vibration damping device comprising:
a first mounting member;
a second mounting member; and
a main rubber elastic body elastically connecting the first and second mounting members, an upper portion of the main rubber elastic body serving as a small-diameter portion to which the first mounting member is bonded, and a lower portion of the main rubber elastic body serving as a large-diameter portion to which the second mounting member is bonded, wherein:
the first mounting member includes an inner recess opening onto an outer circumferential surface thereof, and the small-diameter portion of the main rubber elastic body is bonded to the inner recess,
the main rubber elastic body has an outside diameter dimension made larger at a portion bonded to the inner recess than an outside diameter dimension of the first mounting member at a side lower than the inner recess such that the small-diameter portion of the main rubber elastic body is thick-walled by being bonded to the inner recess,
the main rubber elastic body directly connects opposed faces of an outer circumferential surface of the inner recess and an inner circumferential surface of the second mounting member,
the inner recess includes a deepest part having a maximum depth dimension, and the deepest part includes a curved surface of a concave shape opening radially outward,
the inner recess includes a tapered face inclining radially outward from the deepest part toward opposite sides in an axial direction of the vibration damping device, and
the small-diameter portion of the main rubber elastic body has an outer circumferential surface comprising a concave curved surface of a concave shape opening radially outward, and the deepest part of the inner recess is positioned lower than a deepest part of the concave curved surface.

5. The vibration damping device according to claim 1 , further comprising a pressure-receiving chamber formed on an axially outer side of the large-diameter portion of the main rubber elastic body, a wall part of the pressure-receiving chamber being partially defined by the main rubber elastic body and the pressure-receiving chamber being filled with a non-compressible fluid such that pressure fluctuations arise therein during input of a vibration.

6. The vibration damping device according to claim 5 , wherein an axially lower end face of the first mounting member inserted from a small-diameter side end of the main rubber elastic body into an axial inside thereof comprises a flat part extending in an axis-perpendicular direction at a center portion of the axially lower end face, and an outer circumference of the flat part has an outer-circumference chamfered shape that smoothly curves and connects with the outer circumferential surface of the first mounting member.

7. The vibration damping device according to claim 1 , wherein the main rubber elastic body has an outer surface that is tapered so as to be inclined radially inward from a first position in contact with the second mounting member to a second position above the deepest part of the inner recess of the first mounting member in the axial direction.

8. The vibration damping device according to claim 1 , wherein the deepest part including the curved surface of the concave shape is positioned at an axially medial portion of the inner recess.

9. The vibration damping device according to claim 4 , wherein the first mounting member further includes a projecting part projecting radially outward from an upper side of the inner recess.

10. A vibration damping device comprising:
a first mounting member;
a second mounting member; and
a main rubber elastic body elastically connecting the first and second mounting members, an upper portion of the main rubber elastic body serving as a small-diameter portion to which the first mounting member is bonded, and a lower portion of the main rubber elastic body serving as a large-diameter portion to which the second mounting member is bonded, wherein:
the first mounting member includes an inner recess opening onto an outer circumferential surface thereof, and the small-diameter portion of the main rubber elastic body is bonded to the inner recess,
the main rubber elastic body has an outside diameter dimension made larger at a portion bonded to the inner recess than an outside diameter dimension of the first mounting member at a side lower than the inner recess such that the small-diameter portion of the main rubber elastic body is thick-walled by being bonded to the inner recess, and
the first mounting member further includes a slot-shaped recess provided axially below the inner recess and opening onto the outer circumferential surface of the first mounting member, the slot-shaped recess extending in a circumferential direction, and the main rubber elastic body connects opposed faces of an outer circumferential surface of the slot-shaped recess and an inner circumferential surface of the second mounting member.

Assignees

• Sumitomo Riko Co Ltd

Inventors

• Furumachi Naoki
• Yasuda Takayoshi
• Ichikawa Hiroyuki

Classifications

• F16F1/54

  loaded in compression and shear · CPC title

• F16F13/262

  changing geometry of passages between working and equilibration chambers, e.g. cross-sectional area or length (F16F13/28 takes precedence) · CPC title

• F16F1/3842 Primary

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

• F16F13/108

  characterised by features of plastics springs, e.g. attachment arrangements (F16F13/18 takes precedence) · CPC title

• F16F13/16

  specially adapted for receiving axial loads {(F16F13/1436 takes precedence)} · CPC title