Bearing bush and production method for a bearing bush

Patent metadata

Field	Value
Publication number	US-11193554-B2
Application number	US-202117160328-A
Country	US
Kind code	B2
Filing date	Jan 27, 2021
Priority date	Mar 18, 2020
Publication date	Dec 7, 2021
Grant date	Dec 7, 2021

Abstract

A bearing bush and a method for producing a bearing bush are provided. The bearing bush includes a core element, an elastomer element, a cage element and a sleeve element. The cage element is at least partially embedded in the elastomer element. The elastomer element elastically connects the cage element and the core element to each other. The core element, the cage element and the elastomer element form a pre-assembly element. One of the sleeve element and the cage element includes a protrusion. The other of the sleeve element and the cage element includes a groove, which is engageable with the protrusion, in an assembled state of the bearing bush. The pre-assembly element is fixed in the sleeve element. The protrusion and the groove form a two-point contact in a cross-section.

First claim

What is claimed is:

1. A bearing bush, comprising:
a core element;
an elastomer element;
a cage element; and
a sleeve element, wherein
the cage element is at least partially embedded in the elastomer element,
the elastomer element elastically connects the cage element and the core element to each other, and
the core element, the cage element and the elastomer element form a pre-assembly element;
one of the sleeve element and the cage element comprises a protrusion,
the other of the sleeve element and the cage element comprises a groove, which is engageable with the protrusion,
in an assembled state of the bearing bush, the pre-assembly element is fixed in the sleeve element, and
the protrusion and the groove form a two-point contact in a cross-section.

2. The bearing bush according to claim 1 , wherein
the protrusion substantially has a shape of a circular segment with a first radius, and
the groove substantially has a shape of a circular segment with a second radius, wherein
the first radius is greater than the second radius.

3. The bearing bush according to claim 2 , wherein
a ratio of the first radius to the second radius is in the range of more than about 1.0 to about 1.4.

4. The bearing bush according to claim 3 , wherein
a ratio of the first radius to the second radius is in the range of more than about 1.0 to about 1.1.

5. The bearing bush according to claim 1 , wherein
the two-point contact is formed between the sleeve element and the cage element, and
the cage element is exposed in the region of the two-point contact.

6. The bearing bush according to claim 1 , wherein
at least one of the sleeve element and the cage element comprises a readily elastically deformable material.

7. The bearing bush according to claim 6 , wherein
the readily elastically deformable material is plastic or fiber-reinforced plastic.

8. The bearing bush according to claim 1 , wherein
the protrusion is provided at an axial end of the element comprising the protrusion, and/or
the groove is provided at an axial end of the element comprising the groove.

9. The bearing bush according to claim 1 , wherein
the bearing bush is a hydraulic bearing bush,
wherein the elastomer element comprises at least one chamber for a damping fluid,
wherein when the elastomer element comprises a plurality of chambers, the plurality of chambers is connected by at least one channel, provided by the elastomer element, and
the elastomer element comprises a sealing lip, which is provided radially between the sleeve element and the cage element.

10. The bearing bush according to claim 9 , wherein
the protrusion and the groove form a sealing function for the damping fluid.

11. A production method of a bearing bush, comprising:
providing a core element;
providing a cage element;
elastically connecting the core element and the cage element by an elastomer element, wherein the core element, the cage element and the elastomer element form a pre-assembly element;
providing a sleeve element, wherein
one of the sleeve element and the cage element comprises a protrusion, and
the other of the sleeve element and the cage element comprises a groove, which is engageable with the protrusion; and

fixing the pre-assembly element in the sleeve element such that, in an assembled state of the bearing bush, the protrusion and the groove form a two-point contact in a cross-section.

Assignees

• Sumitomo Riko Co Ltd

Inventors

• Hahn Kay
• Khlistunov Dmitry
• Mysin Aleksey

Classifications

• F16C43/02

  Assembling sliding-contact bearings · CPC title

• F16C33/208

  Methods of manufacture, e.g. shaping, applying coatings · CPC title

• F16C33/12

  Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing · CPC title

• F16C33/04 Primary

  Brasses; Bushes; Linings · CPC title

• F16F15/04

  using elastic means (single elements or their attachment F16F1/00 - F16F13/00); {(F16F15/023, F16F15/03 take precedence)} · CPC title