Sealing bellows for a ball and socket joint comprising such a sealing bellows

Patent metadata

Field	Value
Publication number	US-11313410-B2
Application number	US-201816486057-A
Country	US
Kind code	B2
Filing date	Jan 15, 2018
Priority date	Feb 15, 2017
Publication date	Apr 26, 2022
Grant date	Apr 26, 2022

Abstract

A sealing bellows for a ball joint having a housing-side sealing area, a stud-side sealing area, and an outlet opening arranged between the sealing areas and which penetrates a wall of the sealing bellows. The outlet opening is open in the unassembled state of the sealing bellows. The outlet opening is closed in the assembled state of a ball joint. The sealing bellows and/or the ball joint can be used for a multi-point link, particularly a two-point link.

First claim

The invention claimed is:

1. A sealing bellows for a ball joint, comprising:
a housing-side sealing area;
a stud-side sealing area spaced from the housing-side sealing area;
a wall of the sealing bellows between the housing-side sealing area and the stud-side sealing area has a concave inner surface; and
an outlet opening arranged between the housing-side sealing area and the stud-side sealing area and which penetrates the wall of the sealing bellows formed by an upper partial surface and a lower partial surface,
wherein the outlet opening is open in an unassembled state of the sealing bellows such that the upper partial surface and the lower partial surface are spaced apart from one another, and
wherein the upper partial surface and the lower partial surface of the outlet opening contact one another in an assembled state mounted on the ball joint,
wherein the upper partial surface and the lower partial surface extend substantially perpendicularly with respect to a longitudinal axis of the sealing bellows.

2. The sealing bellows according to claim 1 , wherein the outlet opening has an unmachined inner circumferential surface that defines a contour of the outlet opening.

3. The sealing bellows according to claim 1 , wherein the outlet opening is formed as a gap.

4. The sealing bellows according to claim 1 , wherein the two partial surfaces are oriented parallel to one another and are planar surfaces.

5. The sealing bellows according to claim 1 , further comprising:
a blind hole-like pocket that is recessed into the wall of the sealing bellows on an inner side of the sealing bellows,
wherein the outlet opening opens into the blind hole-like pocket.

6. The sealing bellows according to claim 5 ,
wherein the two partial surfaces are oriented parallel to one another and are spaced apart from one another, and
wherein one of the two parallelly spaced-apart partial surfaces transitions into a base surface of the pocket at least one of uninterrupted and continuously.

7. The sealing bellows according to claim 4 ,
wherein a depth of the outlet opening is less than one third of a wall thickness of the sealing bellows in an area of the outlet opening, and
wherein, in cooperation with the pocket, a continuously open connection is provided between an inner side and an outer side of the sealing bellows.

8. The sealing bellows according to claim 1 , wherein the outlet opening is arranged in at least one of an area of the stud-side sealing area and an area adjacent to the stud-side sealing area.

9. The sealing bellows according to claim 1 , wherein the outlet opening is arranged in an axial direction of the sealing bellows at a height of the stud-side sealing area.

10. The sealing bellows according to claim 1 , wherein more than two outlet openings are arranged to be distributed along a circumference of the sealing bellows.

11. The sealing bellows according to claim 1 , wherein the outlet opening is oriented in a radial direction of the sealing bellows.

12. The sealing bellows according to claim 5 , wherein the outlet opening is formed free from undercuts other than the pocket.

13. The sealing bellows according to claim 1 , further comprising:
a clamping ring groove arranged at the stud-side sealing area,
wherein the outlet opening is arranged proximate to the clamping ring groove and a first end of the concave inner surface.

14. The sealing bellows according to claim 1 , wherein the outlet opening is a radially directed arcuate slit on an outer circumference of the sealing bellows.

15. A ball joint, configured as a lubricatable ball joint, comprising:
a sealing bellows, comprising:
a housing-side sealing area;
a stud-side sealing area spaced from the housing-side sealing area;
a wall of the sealing bellows between the housing-side sealing area and the stud-side sealing area has a concave inner surface; and
an outlet opening arranged between the housing-side sealing area and the stud-side sealing area and which penetrates the wall of the sealing bellows formed by an upper partial surface and a lower partial surface,
wherein the outlet opening is open in an unassembled state of the sealing bellows such that the upper partial surface and the lower partial surface are spaced apart from one another, and
wherein the upper partial surface and the lower partial surface of the outlet opening are in direct contact with one another in an assembled state of the ball joint.

16. The ball joint according to claim 15 , wherein the ball joint is a multi-point link, configured as a two-point link.

17. The sealing bellows according to claim 15 , wherein the outlet opening partial surfaces are planar and oriented parallel to one another.

18. A method for assembling a ball joint comprising:
installing a sealing bellows between a ball joint and a ball joint mount;
axially compressing the sealing bellows by a stud-side connection component part,
wherein air trapped in the sealing bellows can escape from an at least partially open outlet opening during the axial compression of the sealing bellows,
wherein the outlet opening is open in an unassembled state of the sealing bellows such that an upper partial surface and a lower partial surface are spaced apart from one another, and
wherein the upper partial surface and the lower partial surface of the outlet opening contact one another in an assembled state mounted on the ball joint,
wherein the upper partial surface and the lower partial surface extend substantially perpendicularly with respect to a longitudinal axis of the sealing bellows.

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Sokolihs Dirk
• Petersen Uwe

Classifications

• F16C2326/05

  Vehicle suspensions, e.g. bearings, pivots or connecting rods used therein · CPC title

• F16C11/068

  Special features relating to lubrication · CPC title

• F16C2326/24

  Steering systems, e.g. steering rods or columns · CPC title

• F16C11/0671 Primary

  allowing operative relative movement of joint parts due to flexing of the sealing means · CPC title

• F16J3/046

  Lubrication or venting arrangements · CPC title