Stabilizer assembly with actuator for a two-track vehicle

Patent metadata

Field	Value
Publication number	US-12479252-B2
Application number	US-202118251442-A
Country	US
Kind code	B2
Filing date	Nov 2, 2021
Priority date	Nov 4, 2020
Publication date	Nov 25, 2025
Grant date	Nov 25, 2025

Abstract

A stabilizer assembly for a two-track vehicle comprises: a first and a second stabilizer section; a spring element between the stabilizer sections; a hydraulic actuator having an actuator outer part and an actuator inner part, each of which is non-rotatably connected to one of the stabilizer sections, and an intermediate element connected to the actuator outer part and actuator inner part respectively via outer and inner engagement means, wherein one of the engagement means has a pitch component in the axial direction and the other runs parallel to the longitudinal axis, so that a relative rotational movement of the actuator parts is converted into an axial movement of the intermediate element, wherein the intermediate element pressurises a first and second hydraulic chamber respectively; the hydraulic chambers being hydraulically connected to one another with interposition of a control element.

First claim

The invention claimed is:

1 . A stabilizer assembly for a two-track vehicle comprising:
a first stabilizer section; a second stabilizer section; a hydraulic actuator having an actuator outer part which is connected to one of the first and second stabilizer sections in a rotationally fixed manner, and having an actuator inner part which is connected to the other one of the first and second stabilizer sections in a rotationally fixed manner, and an intermediate element connected to the actuator outer part via outer engagement means and connected to the actuator inner part via inner engagement means, wherein one of the outer and inner engagement means has a pitch component in the axial direction and the other one of the outer and inner engagement means extends parallel to the longitudinal axis so that a relative rotational movement between the actuator outer part and the actuator inner part is converted into an axial movement of the intermediate element, wherein the intermediate element pressurises a first hydraulic chamber when moving in a first direction and pressurises a second hydraulic chamber when moving in the opposite second direction; wherein a spring element is arranged between the first stabilizer section and the second stabilizer section; and wherein the first hydraulic chamber and the second hydraulic chamber are hydraulically connected to each other with a control element being interposed therebetween.

2 . The stabilizer assembly according to claim 1 ,
wherein both of a first hydraulic connector for the first hydraulic chamber and a second hydraulic connector for the second hydraulic chamber are connected to the actuator outer part.

3 . The stabilizer assembly according to claim 2 ,
wherein a first connecting line between the first hydraulic connector and the control element, and a second connecting line between the second hydraulic connector and the control element, are both configured rigid or flexible.

4 . The stabilizer assembly according to claim 1 ,
wherein the actuator outer part is configured as a housing part, and that the actuator inner part is configured as a hollow shaft, wherein one of the actuator outer part and the actuator inner part is connected to the first stabilizer section in a rotationally fixed manner, and the other one of the actuator outer part and the actuator inner part is connected to the second stabilizer section in a rotationally fixed manner.

5 . The stabilizer assembly according to claim 4 ,
wherein the spring element is configured as a torsion spring which is arranged functionally parallel to the actuator between the first stabilizer section and the second stabilizer section, wherein the torsion spring extends axially through the actuator inner part designed as hollow shaft, and includes a first end portion connected in a rotationally fixed manner to the first stabilizer section and a second end portion connected in a rotationally fixed manner to the second stabilizer section.

6 . The stabilizer assembly according to claim 1 ,
wherein the intermediate element has a first end portion associated with the first hydraulic chamber and a second end portion associated with the second hydraulic chamber, wherein one of the first end portion and the second end portion of the intermediate element is sealed relative to the actuator outer part by an outer seal and is seal-free relative to the actuator inner part, and the other one of the first end portion and the second end portion of the intermediate element is sealed relative to the actuator inner part by an inner seal and is seal-free relative to the actuator outer part.

7 . The stabilizer assembly according to claim 1 ,
wherein the outer engagement means run at an angle to the longitudinal axis and the inner engagement means run parallel to the longitudinal axis, or, wherein the outer engagement means run parallel to the longitudinal axis and the inner engagement means run at an angle to the longitudinal axis.

8 . The stabilizer assembly according to claim 1 ,
wherein the outer engagement means of the intermediate element are configured in the form of helical toothing which engages in a helically rotatable manner with a respective counter-toothing of the actuator outer part.

9 . The stabilizer assembly according to claim 1 ,
wherein the inner engagement means of the intermediate element are configured as splines which engage corresponding shaft splines of the actuator inner part in a rotationally fixed and axially displaceable manner.

10 . The stabilizer assembly according to claim 1 ,
wherein the axial extension of the engagement means running parallel to the longitudinal axis is shorter than an axial length of the intermediate element.

11 . The stabilizer assembly according to claim 1 ,
wherein the control element includes a damping unit and a pressure accumulator, with the damping unit being configured as a semi-active or active unit.

12 . The stabilizer assembly according to claim 11 ,
wherein the damping unit comprises a frequency-selective valve which has a variable damping force as a function of an oscillation frequency of the stabilizer assembly, wherein the frequency-selective valve is configured to have a damping force that at high excitation frequencies of more than 5 Hz is lower than at low excitation frequencies of less than 2 Hz.

13 . The stabilizer assembly according to claim 1 ,
wherein the control element is arranged at least partially with axial overlap to the actuator and has a control housing which is firmly connected to the actuator outer part.

14 . The stabilizer assembly according to claim 1 ,
wherein the control element is arranged at least partially axially offset with respect to the actuator, the control housing being firmly connected at least indirectly to the actuator outer part.

15 . The stabilizer assembly according to claim 14 ,
wherein the control housing is connected to the stabilizer section connected to the actuator outer part via a connecting element, the connecting element being able to absorb angular differences.

Assignees

• Muhr & Bender Kg

Inventors

• Schröder Daniel
• Schrüllkamp Thomas
• Gersmeier Andreas
• Vos Serge
• Zeller Gerhard

Classifications

• B60G2202/441

  where axial movement is translated to rotation of the connected end part · CPC title

• B60G2202/154

  with an accumulator · CPC title

• B60G2202/135

  Stabiliser bar and/or tube · CPC title

• B60G21/0558

  including means varying the stiffness of the stabiliser (B60G21/0556 takes precedence) · CPC title

• B60G17/025

  the mechanical spring being a torsion spring (B60G17/0277, B60G21/0553 take precedence) · CPC title