Vibration damper having a gas-filled enveloping body

Patent metadata

Field	Value
Publication number	US-12504052-B2
Application number	US-202318204122-A
Country	US
Kind code	B2
Filing date	May 31, 2023
Priority date	Jun 1, 2022
Publication date	Dec 23, 2025
Grant date	Dec 23, 2025

Abstract

Vibration damper, having a working cylinder filled with damping medium which with an outer lateral surface and an intermediate tube arranged on the lateral surface forms a fluid channel. The working cylinder forms with an outer container tube an annular space which functions as a compensation chamber and in which an enveloping body having a gas filling is arranged. The intermediate tube is designed with a mounting protection element which at least partially covers an end face of the intermediate tube opposed to a mounting direction of the enveloping body.

First claim

The invention claimed is:

1 . A vibration damper, comprising:
an outer container tube; a mounting protection element; a working cylinder filled with damping medium which with an outer lateral surface; an intermediate tube arranged on the outer lateral surface that forms a fluid channel; an annular space configured as a compensation chamber in which an enveloping body having a gas filling is arranged, the annular space being formed by the working cylinder and the outer container tube; wherein the intermediate tube is designed with the mounting protection element which at least partially covers an end face of the intermediate tube opposed to a mounting direction of the enveloping body.

2 . The vibration damper as claimed in claim 1 , wherein the mounting protection element is a cap that is separate from the intermediate tube.

3 . The vibration damper as claimed in claim 1 , wherein the mounting protection element is fixed to the outer lateral surface of the working cylinder by force-based engagement.

4 . The vibration damper as claimed in claim 1 , wherein the mounting protection element has a rib structure on an inside.

5 . The vibration damper as claimed in claim 4 , wherein the rib structure comprises a clamping surfaces with respect to the outer lateral surface of the working cylinder.

6 . The vibration damper as claimed in claim 1 , wherein an axial connection between the mounting protection element and the intermediate tube is a butt joint.

7 . The vibration damper as claimed in claim 1 , wherein the mounting protection element has at a transition to the intermediate tube a same outside diameter as the intermediate tube.

8 . The vibration damper as claimed in claim 1 , wherein the mounting protection element has a closed surface structure in a circumferential region of a sliding surface for the enveloping body.

9 . The vibration damper as claimed in claim 1 , wherein an annular space enclosed by the mounting protection element is connected to the compensation chamber by at least one connection opening.

10 . The vibration damper as claimed in claim 9 , wherein the mounting protection element is provided at each end with a respective at least one connection opening.

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Schwarz Alexander
• Göllner Bernd
• Neckermann Peter

Classifications

• F16F9/02

  using gas only {or vacuum (F16F9/006 takes precedence)} · CPC title

• F16F2230/0023

  protective · CPC title

• F16F9/369

  Sealings for elements other than pistons or piston rods, e.g. valves · CPC title

• F16F9/32

  Details · CPC title

• F16F9/08

  where gas is} in a chamber with a flexible wall {(pressurised fluid system accumulators per se F15B1/04) · CPC title