Adjustable vibration damper

Patent metadata

Field	Value
Publication number	US-11242907-B2
Application number	US-201816650207-A
Country	US
Kind code	B2
Filing date	Aug 13, 2018
Priority date	Sep 25, 2017
Publication date	Feb 8, 2022
Grant date	Feb 8, 2022

Abstract

An adjustable vibration damper includes at least one adjustable damping valve, with a piston at a piston rod that divides a cylinder into a work chamber on the piston rod side and a work chamber on the side remote of the piston rod. The cylinder is at least partially enclosed by an intermediate tube that forms a fluid connection between one of the work chambers and the adjustable damping valve. A hydraulic apparatus is connected to the fluid connection of the one work chamber via a first line and to the other work chamber via a second line.

First claim

The invention claimed is:

1. Adjustable vibration damper comprising:
a cylinder;
piston rod;
at least one adjustable damping valve;
a piston at the piston rod which divides the cylinder into a first work chamber on a piston rod side and a second work chamber on a side remote of the piston rod;
an intermediate tube that at least partially encloses the cylinder and which forms a fluid connection between one of the first and the second work chambers and the at least one adjustable damping valve; and
a hydraulic apparatus connected to the fluid connection of the one of the first and the second work chambers via a first line and to an other of the first and the second work chambers via a second line,
wherein the hydraulic apparatus has at least one connection sleeve connected to the fluid connection to engage in a hydraulic connection in the intermediate tube,
wherein the at least one connection sleeve is a component part separate from a connection socket for the hydraulic apparatus at the vibration damper,
wherein the connection socket comprises a bottom part and a cover that form a housing in which the at least one connection sleeve is fixed,
wherein the at least one connection sleeve is supported with respect to the bottom part so as to be displaceable radially relative to a longitudinal axis of the at least one connection sleeve in an assembled position.

2. The adjustable vibration damper according to claim 1 , wherein the intermediate tube has a separate hydraulic connection for the at least one adjustable damping valve and for the first and the second line to the hydraulic apparatus, respectively.

3. The adjustable vibration damper according to claim 2 , wherein a hydraulic connection for the hydraulic apparatus is constructed to be offset in circumferential direction with respect to a hydraulic connection for the at least one adjustable damping valve.

4. The adjustable vibration damper according to claim 1 , wherein each of the first and the second work chambers have a respective fluid connection to a respective adjustable damping valve and the hydraulic apparatus is connected by the first and the second line to a respective fluid connection.

5. The adjustable vibration damper according to claim 1 , wherein the at least one connection sleeve has a supporting flange via which the at least one connection sleeve is fixed.

6. The adjustable vibration damper according to claim 1 , wherein the at least one connection sleeve is fixed in longitudinal direction of the at least one connection sleeve at least indirectly between the bottom part and the cover of the connection socket.

7. The adjustable vibration damper according to claim 1 , wherein the hydraulic apparatus is fastened to a connection socket.

8. The adjustable vibration damper according to claim 1 , wherein a connection socket has line connections for a separately arranged hydraulic device.

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Ruhmann Lukas
• Manger Thomas
• Schmitt Stefan
• Zeissner Bernd
• Solf Thomas

Classifications

• B60G2202/24

  Fluid damper · CPC title

• B60G17/08

  Characteristics of fluid dampers (adjusting fluid dampers in general F16F9/44 - F16F9/53) · CPC title

• B60G2202/416

  using a pump, e.g. in the line connecting the lower chamber to the upper chamber of the actuator · CPC title

• B60G2202/413

  Hydraulic actuator · CPC title

• F16F9/46 Primary

  allowing control from a distance {, i.e. location of means for control input being remote from site of valves, e.g. on damper external wall (attachment of valve units to cylinders F16F9/325)} · CPC title