Seal arrangement for an air spring system

Patent metadata

Field	Value
Publication number	US-9694642-B2
Application number	US-201514663129-A
Country	US
Kind code	B2
Filing date	Mar 19, 2015
Priority date	Sep 21, 2012
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

A seal arrangement for an air spring system for sealing off a shock-absorbing damper is disclosed. The shock-absorbing damper is situated in a rolling tube and in another tube, where the air spring system has at least one integrated control valve for the admission of compressed air into a pressure chamber formed between the outer tube, the rolling tube, and an air spring bellows that connects the outer tube and rolling tube. The seal arrangement is arranged between an inner circumferential surface of the rolling tube and an outer circumferential surface of the shock-absorbing damper and/or between an inner circumferential surface of the outer tube and the outer circumferential surface of the shock-absorbing damper. A support ring which is of step-shaped form on an outer circumferential surface is arranged on a distal end of the rolling tube and/or on a distal end of the outer tube.

First claim

What is claimed is:

1. An air spring system with a seal arrangement, comprising:
a shock absorber which is disposed in a rolling tube and an outer tube;
a control valve for loading a pressure chamber with compressed air, wherein the pressure chamber is formed between the rolling tube, the outer tube, and an air spring bellows which connects the rolling tube and the outer tube; and
a seal arrangement, wherein the seal arrangement is disposed between an inner circumferential face of the rolling tube and an outer circumferential face of the shock absorber, the seal arrangement comprising:
a supporting ring which has a step-shaped configuration on an outer circumferential face of the supporting ring, wherein the supporting ring is disposed at a distal end of the rolling tube;
wherein the distal end of the rolling tube includes, on the inner circumferential face, a receiving region in which the supporting ring is received, wherein the receiving region has a greater internal diameter than a surrounding region of the rolling tube and wherein an increase in the internal diameter forms a shoulder;
a seal element, wherein the seal element is arranged axially between an end face of the supporting ring and the shoulder; and
an annular disk, wherein the annular disk is arranged between the seal element and the end face of the supporting ring.

2. The air spring system with the seal arrangement as claimed in claim 1 , wherein the supporting ring is a metallic or a polymeric material.

3. The air spring system with the seal arrangement as claimed in claim 1 , wherein the supporting ring is connected to the shock absorber in an integrally joined manner.

4. The air spring system with the seal arrangement as claimed in claim 1 , wherein the supporting ring has at least two step faces, wherein one of the at least two step faces is a supporting face for the rolling tube and wherein another of the at least two step faces is a supporting face for the seal element or the annular disk.

5. The air spring system with the seal arrangement as claimed in claim 1 , wherein the annular disk is mounted in a floating manner between the outer circumferential face of the shock absorber and the inner circumferential face of the rolling tube.

6. The air spring system with the seal arrangement as claimed in claim 1 , wherein the annular disk is a metallic or a polymeric material and wherein an end side of the annular disk arranged next to the seal element is surface-ground.

7. The air spring system with the seal arrangement as claimed in claim 1 , wherein the end face of the supporting ring is surface-ground.

8. An air spring system with a seal arrangement, comprising:
a shock absorber which is disposed in a rolling tube and an outer tube;
a control valve for loading a pressure chamber with compressed air, wherein the pressure chamber is formed between the rolling tube, the outer tube, and an air spring bellows which connects the rolling tube and the outer tube; and
a seal arrangement, wherein the seal arrangement is disposed between an inner circumferential face of the outer tube and an outer circumferential face of the shock absorber, the seal arrangement comprising:
a supporting ring which has a step-shaped configuration on an outer circumferential face of the supporting ring, wherein the supporting ring is disposed at a distal end of the outer tube;
wherein the distal end of the outer tube includes, on the inner circumferential face, a receiving region in which the supporting ring is received, wherein the receiving region has a greater internal diameter than a surrounding region of the outer tube and wherein an increase in the internal diameter forms a shoulder;
a seal element, wherein the seal element is arranged axially between an end face of the supporting ring and the shoulder; and
an annular disk, wherein the annular disk is arranged between the seal element and the end face of the supporting ring.

9. The air spring system with the seal arrangement as claimed in claim 8 , wherein the supporting ring is a metallic or a polymeric material.

10. The air spring system with the seal arrangement as claimed in claim 8 , wherein the supporting ring is connected to the shock absorber in an integrally joined manner.

11. The air spring system with the seal arrangement as claimed in claim 8 , wherein the supporting ring has at least two step faces, wherein one of the at least two step faces is a supporting face for the outer tube and wherein another of the at least two step faces is a supporting face for the seal element or the annular disk.

12. The air spring system with the seal arrangement as claimed in claim 8 , wherein the annular disk is mounted in a floating manner between the outer circumferential face of the shock absorber and the inner circumferential face of the outer tube.

13. The air spring system with the seal arrangement as claimed in claim 8 , wherein the annular disk is a metallic or a polymeric material and wherein an end side of the annular disk arranged next to the seal element is surface-ground.

14. The air spring system with the seal arrangement as claimed in claim 8 , wherein the end face of the supporting ring is surface-ground.

Assignees

• Knorr Bremse Systeme Fuer Nutzfahrzeuge Gmbh

Inventors

• Kantor Kornel
• Tanczos Miklos

Classifications

• B60G2204/1262

  on a damper · CPC title

• B60G17/0485

  the springs being pneumatic springs with a flexible wall, e.g. with levelling valves · CPC title

• F16F9/05

  the flexible wall being of the rolling diaphragm type · CPC title

• B60G15/14

  the damper being connected to the stub axle and the spring being arranged around the damper · CPC title

• B60G17/0521

  the spring having a flexible wall · CPC title