Air spring device

• US 20050253316A1
• Filed: 04/29/2005
• Published: 11/17/2005
• Est. Priority Date: 05/13/2004
• Status: Active Grant

• Current Assignee: Vibracoustic GmbH & Company KG (Freudenberg & Company KG)
• Original Assignee: Vibracoustic GmbH & Company KG (Freudenberg & Company KG)
• Inventors: Weber, Michael, Harms, Ingo, Kobs, Peter
• Granted Patent: US 7,258,330 B2
• Time in Patent Office: Days
• US Class Current: 267/64.270
• CPC Class Codes: F16F 9/057 characterised by the piston
• CPC Class Codes: F16F 9/38 Covers for protection or appearance

Abstract

An air spring device characterized in that a cover encloses a pot-shaped basic component and a separate connecting component with a first connecting region for one end of a bellows. The basic component and the connecting component are in direct contact with one another. In a region of the cover there is also provided, as a separate component, a holder for a protective collar. The holder is in direct contact with the connecting component. A common tightening ring, the two ends of which are fastened to each other by a connection, hold together, from the outside and in sealing manner, the basic component, the connecting component, and the protective collar holder.

Claims

1. An air spring device comprising:

at least one air spring bellows made of an elastomeric material and having two ends, said bellows enclosing a variable-volume air chamber with formation of a loop;

a cover with a first connection region for one end of the bellows;

a rolling piston provided with a second connection region for the other end of the bellows and also with a rolling surface for the loop; and

a protective collar for the air spring bellows;

wherein the cover encloses a pot-shaped basic component and a separate connecting component with a first connection region for one end of the bellows, the basic component and the connecting component being in direct contact with one another;

a holder for the protective collar provided in a region of the cover, the holder being in direct contact with the connecting component; and

a common tightening ring, two ends of the common tightening ring being fastened to each other by a connection, the ring holding together, from the outside and in a sealing manner, the basic component, the connecting component, and the protective collar holder.

2. The air spring device as defined in claim 1, wherein the basic component and/or the connecting component and/or the holder for the protective collar are comprised of a plastic material.

3. The air spring device as defined in claim 2, wherein the plastic material is a high impact resistant polymer with high impact resistance.

4. The air spring device as defined in claim 3, wherein the high impact resistant polymer is polyamide or polyester.

5. The air spring device as defined in claim 2, wherein the plastic material is reinforced.

6. The air spring device as defined in claim 5, wherein the plastic material is reinforced with fabric or glass fibers.

7. The air spring device as defined in claim 1, wherein the basic component, the connecting component, and the holder for the protective collar are provided in the region of a clamping ring with flanged extensions, the clamping ring having a common outer surface that runs flush with an inside surface of the tightening ring.

8. The air spring device as defined in claim 7, wherein both the basic component and the holder for the protective collar have an undercut;

and

prongs of the tightening ring enclose each undercut.

9. The air spring device as defined in claim 1, wherein a sealing ring made of a polymeric material is disposed between the basic component and the connecting component.

10. The air spring device as defined in claim 9, wherein the sealing ring consists of an elastomeric material or a thermoplastic elastomer.

11. The air spring device as defined in claim 7, wherein the ends of the clamping ring are linked by an interlocking connection.

12. The air spring device as defined in claim 7, wherein the ends of the clamping ring are connected by a welded connection.

13. The air spring device as defined in claim 7, wherein the ends of the clamping ring are connected by a clip connection, with a prong-shaped clip end engaging with openings which are arranged in a row.

14. The air spring device as defined in claim 7, wherein the ends of the clamping ring are connected by a rivet connection.

15. The air spring device as defined in claim 7, wherein the ends of the clamping ring are connected by a deformable, endless, closed connection overhang.

16. The air spring device as defined in claim 15, wherein the connection overhang is bent.

17. The air spring device as defined in claim 7, wherein the clamping ring consists of a metal.

18. The air spring device as defined in claim 1, wherein the connecting component and the first connecting region are made of a single part or of multiple parts, with an integrated elastomeric bearing.