Pressure buffer stop for a vibration damper

Patent metadata

Field	Value
Publication number	US-11434967-B2
Application number	US-201716308868-A
Country	US
Kind code	B2
Filing date	Jun 22, 2017
Priority date	Jun 27, 2016
Publication date	Sep 6, 2022
Grant date	Sep 6, 2022

Abstract

A pressure buffer stop for a vibration damper that comprises for being at least partially received in a dome bearing housing an outer contour and for coaxial arrangement on a piston rod of the vibration damper a hollow-cylindrical basic structure with an inner contour, wherein the outer contour of the pressure buffer stop comprises in at least one region for being at least partially received in the dome bearing housing a three-dimensionally structured surface.

First claim

What is claimed is:

1. A pressure buffer stop for a vibration damper, wherein the pressure buffer stop comprises:
an outer contour configured to be at least partially received in a dome bearing housing of the vibration damper,
a hollow-cylindrical basic structure with an inner contour configured to arrange the pressure buffer stop coaxially on a piston rod of the vibration damper,
wherein the outer contour of the pressure buffer stop comprises in at least one region configured to be at least partially received in the dome bearing housing a three-dimensionally structured surface, with the three-dimensionally structured surface being radially spaced apart from the inner contour that is configured to receive the piston rod, with the three-dimensionally structured surface comprising projections having a spherical contour,
wherein the three-dimensionally structured surface is disposed on a convex portion of the outer contour between a radial outermost portion of the pressure buffer stop and a longitudinal end of the pressure buffer stop.

2. The pressure buffer stop of claim 1 , wherein the three-dimensionally structured surface is a three-dimensional topographical surface structure.

3. The pressure buffer stop of claim 1 , wherein the three-dimensionally structured surface comprises a plurality of recesses.

4. The pressure buffer stop of claim 3 , wherein the projections and/or the plurality of recesses are at least partially distributed homogeneously, at least in the region.

5. The pressure buffer stop of claim 3 , wherein the projections and/or the plurality of recesses are at least partially distributed heterogeneously, at least in the region.

6. The pressure buffer stop of claim 1 , including a plurality of clamping elements arranged on the inner contour of the pressure buffer stop, the clamping elements sized and shaped to extend and connect to the piston rod to form a clamping connection between the piston rod and the pressure buffer stop and arrange the pressure buffer stop coaxially on the piston rod.

7. The pressure buffer stop of claim 6 , wherein the plurality of clamping elements at least partially comprise a helical geometric construction and are arranged on the inner contour of the pressure buffer stop in a helical manner.

8. The pressure buffer stop of claim 6 , wherein the plurality of clamping elements are arranged in groups as clamping modules in the piston rod longitudinal direction on the inner contour of the pressure buffer stop.

9. The pressure buffer stop of claim 8 , wherein the plurality of clamping elements and/or clamping modules are arranged in opposing directions in a helical manner in the piston rod longitudinal direction on the inner contour of the pressure buffer stop.

10. The pressure buffer stop of claim 8 , wherein the plurality of clamping elements and/or clamping modules comprise a three-dimensional structured surface at least in a region for the coaxial arrangement on the piston rod.

11. The pressure buffer stop of claim 10 , wherein the three-dimensional structured surface of the plurality of clamping elements and/or clamping modules comprises a plurality of projections and/or a plurality of recesses.

12. A vibration damper for a vehicle, comprising: a damper pipe at least partially filled with damping fluid,
a piston rod movably disposed in the damper pipe, and
a piston operatively connected to the piston rod, the piston dividing an inner space of the damper pipe into a piston-rod-side operating space and an operating space remote from the piston rod, and the pressure buffer stop of claim 1 arranged on the piston rod.

13. The pressure buffer stop of claim 1 wherein the inner contour is coaxial with a longitudinal axis, wherein the projections of the three-dimensionally structured surface extend from a surface of the outer contour, wherein the outer contour extends farther in a first longitudinal direction along the longitudinal axis and farther in a second longitudinal direction along the longitudinal axis than any of the projections, with the first and second longitudinal directions being opposite one another.

14. The pressure buffer stop of claim 1 wherein the inner contour is coaxial with a longitudinal axis, wherein the longitudinal axis is perpendicular to a radial plane, wherein the projections of the three-dimensionally structure surface extend from the outer contour at angles that are transverse to the longitudinal axis and the radial plane, wherein the projections are configured to mate with the dome bearing housing of the vibration damper.

15. A pressure buffer stop for a vibration damper, wherein the pressure buffer stop comprises:
an outer contour configured to be at least partially received in a dome bearing housing of the vibration damper,
a hollow-cylindrical basic structure with an inner contour configured to arrange the pressure buffer stop coaxially on a piston rod of the vibration damper,
wherein the outer contour of the pressure buffer stop comprises in at least one region configured to be at least partially received in the dome bearing housing a three-dimensionally structured surface, with the three-dimensionally structured surface comprising projections having a spherical contour,
wherein the three-dimensionally structured surface is disposed on a convex portion of the outer contour between a radial outermost portion of the pressure buffer stop and a longitudinal end of the pressure buffer stop, with the three-dimensionally structured surface being spaced apart from the inner contour.

16. The pressure buffer stop of claim 15 wherein the spherical contour of a first of the projections has a diameter that is larger than the spherical contour of a second of the projections.

17. The pressure buffer stop of claim 15 wherein the three-dimensionally structured surface comprises recesses having a spherical contour.

18. The pressure buffer stop of claim 17 wherein the spherical contour of a first of the recesses has a diameter that is larger than the spherical contour of a second of the recesses.

Assignees

• Thyssen Krupp Bilstein Gmbh
• Thyssenkrupp Ag

Inventors

• Ehinger Alexander
• Nezami Amin

Classifications

• B60G15/066

  the spring being different from a coil spring (B60G15/065 takes precedence) · CPC title

• B60G15/063

  characterised by the mounting of the spring on the damper (B60G15/065, B60G15/066 take precedence) · CPC title

• F16F1/3732

  having an annular or the like shape, e.g. grommet-type resilient mountings · CPC title

• F16F1/377

  having holes or openings ({F16F1/37} , F16F1/387 take precedence) · CPC title

• F16F1/376 Primary

  having projections, studs, serrations or the like on at least one surface ({F16F1/3835} , F16F1/387 take precedence) · CPC title