Vibration damper and vehicle

Patent metadata

Field	Value
Publication number	US-11320016-B2
Application number	US-201916687799-A
Country	US
Kind code	B2
Filing date	Nov 19, 2019
Priority date	Nov 29, 2018
Publication date	May 3, 2022
Grant date	May 3, 2022

Abstract

A vibration damper may include an external tube and at least one internal tube. The external and internal tubes may be disposed in a coaxial manner relative to one another. An annular gap may exist between the external tube and the internal tube, and the annular gap may be fluidically connected to the internal tube. The annular gap may form a compensation chamber for receiving damper oil and damper gas for preloading of the damper oil in the compensation chamber. The vibration damper may further include a separating element disposed in the compensation chamber. The separating element may be axially displaceable and may separate the damper oil from the damper gas in a fluid-tight manner.

First claim

What is claimed is:

1. A vibration damper comprising:
an external tube;
an internal tube, wherein the external and internal tubes are disposed in a coaxial manner relative to one another, wherein an annular gap between the external tube and the internal tube is fluidically connected to the internal tube, the annular gap forming a compensation chamber for receiving a damper oil and a damper gas for preloading of the damper oil in the compensation chamber; and
a separating element disposed in the compensation chamber, wherein the separating element is axially displaceable and separates the damper oil from the damper gas in a fluid-tight manner, wherein the separating element comprises:
a sealing lip that lies against both the external tube and the internal tube in a fluid-tight manner,
an outer compression chamber that is configured radially externally between a body of the separating element and the external tube and that is delimited axially by the sealing lip, and
an inner compression chamber that is configured radially internally between the body of the separating element and the internal tube and that is delimited axially by the sealing lip.

2. The vibration damper of claim 1 wherein the separating element is of annular configuration.

3. The vibration damper of claim 1 wherein the separating element, which originates from a front face, comprises tapering of a cross section such that a sealing lip edge is configured on the sealing lip.

4. The vibration damper of claim 1 wherein the separating element is configured in a rotationally symmetrical manner.

5. The vibration damper of claim 1 wherein the separating element is configured in a single piece.

6. The vibration damper of claim 1 comprising a reinforcing ring that engages axially at least partially in the separating element.

7. The vibration damper of claim 1 wherein the separating element has a reinforcing disc that is embedded in a front face of the separating element and that terminates flush with the front face.

8. The vibration damper of claim 1 wherein the separating element is elastically deformable.

9. The vibration damper of claim 1 wherein the separating element is solid between the internal tube and the external tube except for the inner and outer compression chambers.

10. A vibration damper comprising:
an external tube disposed along a longitudinal axis;
an internal tube, wherein the external and internal tubes are disposed in a coaxial manner relative to one another, wherein an annular gap between the external tube and the internal tube is fluidically connected to the internal tube, the annular gap forming a compensation chamber for receiving a damper oil and a damper gas for preloading of the damper oil in the compensation chamber;
a separating element disposed in the compensation chamber, wherein the separating element is axially displaceable and separates the damper oil from the damper gas in a fluid-tight manner, wherein between the internal tube and the external tube at least one solid portion of the separating element occupies a radial plane that extends orthogonally in all directions from the longitudinal axis;
a first reinforcing disc that is received in a recess disposed in a first axial end face of the separating element at a radial midpoint between the internal tube and the external tube; and
a second reinforcing disc that is received in a recess disposed in a second axial end face of the separating element at a radial midpoint between the internal tube and the external tube.

11. The vibration damper of claim 10 wherein the first axial end face of the separating element is planar and extends from the internal tube to the external tube, wherein the second axial end face of the separating element is planar and extends from the internal tube to the external tube.

12. The vibration damper of claim 10 wherein the separating element is recessed from the internal tube and the external tube at an axial midpoint of the separating element.

13. A vibration damper comprising of:
an external tube disposed along a longitudinal axis;
an internal tube, wherein the external and internal tubes are disposed in a coaxial manner relative to one another, wherein an annular gap between the external tube and the internal tube is fluidically connected to the internal tube, the annular gap forming a compensation chamber for receiving a damper oil and a damper gas for preloading of the damper oil in the compensation chamber;
a separating element disposed in the compensation chamber, wherein the separating element is axially displaceable and separates the damper oil from the damper gas in a fluid-tight manner, wherein between the internal tube and the external tube at least one solid portion of the separating element occupies a radial plane that extends orthogonally in all directions from the longitudinal axis;
a sealing lip that lies against at least one of the external tube or the internal tube in a fluid-tight manner; and
at least one of:
an outer compression chamber that is configured radially externally between a body of the separating element and the external tube and that is delimited axially by the sealing lip, or
an inner compression chamber that is configured radially internally between the body of the separating element and the internal tube and that is delimited axially by the sealing lip,

wherein the at least one of the outer compression chamber or the inner compression chamber is formed by two tapered surfaces of the separating element that are transverse to the longitudinal axis.

14. The vibration damper of claim 13 wherein a first of the two tapered surfaces forms a part of the sealing lip and extends from a portion of the sealing lip that contacts the internal tube or the external tube.

15. The vibration damper of claim 10 comprising a compression chamber formed between a first surface of the separating element, a second surface of the separating element, and either the internal tube or the external tube, wherein the separating element extends longitudinally between a first axial end and a second axial end, wherein the first surface tapers from the first axial end and the second surface tapers from the second axial end to meet at a radially-thinnest portion of the separating element that is located between the first and second axial ends of the separating element, wherein angles formed by tapers of the first and second surfaces are transverse to the longitudinal axis and to a wall of the either the internal tube or the external tube.

Assignees

• Thyssen Krupp Bilstein Gmbh
• Thyssenkrupp Ag

Inventors

• Woenarta Freddy

Classifications

• F16F9/363

  the guide being mounted between the piston and the sealing, enabling lubrication of the guide · CPC title

• F16F9/061

  Mono-tubular units · CPC title

• B60G2800/162

  Reducing road induced vibrations · CPC title

• F16F9/3242

  of cylinder ends, e.g. caps · CPC title

• F16F9/067

  Partitions of the piston type, e.g. sliding pistons · CPC title