Wheel suspension for a two-track vehicle

Patent metadata

Field	Value
Publication number	US-10246149-B2
Application number	US-201715703234-A
Country	US
Kind code	B2
Filing date	Sep 13, 2017
Priority date	Sep 15, 2016
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

Abstract

A wheel suspension for a two-track vehicle having at least one stabilizer formed as a stabilizer torsion spring rod, with the stabilizer extending in the vehicle's transverse direction and having a drive lever on at least one vehicle side, which acts upon a wheel guidance element of the wheel suspension, and having at least one suspension spring, which is tensioned with a spring preload between the vehicle body and a wheel guidance element of the wheel suspension. The suspension spring is at least partially formed as a suspension spring/torsion spring rod. The suspension spring/torsion spring rod is arranged radially within the stabilizer torsion spring rod designed as a hollow rod.

First claim

The invention claimed is:

1. A wheel suspension for a two-track vehicle, comprising:
at least one stabilizer formed as a stabilizer torsion spring rod, with the stabilizer extending in the vehicle's transverse direction and having a drive lever on at least one side of the vehicle, which acts upon a wheel guidance element of the wheel suspension, and having at least one suspension spring, which is tensioned with a spring preload between the vehicle body and a wheel guidance element of the wheel suspension, wherein the suspension spring is at least partially formed as a suspension spring/torsion spring rod, wherein the suspension spring/torsion spring rod is arranged radially within the stabilizer torsion spring rod formed as a hollow rod, wherein a first actuator for extending a suspension spring foot point, for regulating a vehicle level of the vehicle body, and a second actuator for adjusting a suspension spring constant is allocated to the suspension spring.

2. The wheel suspension according to claim 1 , wherein the first or second actuator is radially arranged, affixed to the body, outside of the stabilizer torsion spring rod, and in that particularly the first actuator is connected to the suspension spring torsion spring rod arranged radially within the stabilizer torsion spring rod by way of a gear speed.

3. The wheel suspension according to claim 1 , wherein, in order to connect the suspension spring/torsion spring rod to the first and/or second actuator, a power transfer path is provided, in which an external end of the suspension spring/torsion spring rod, protruding axially over the stabilizer torsion spring rod is connected to an axial bar, which extends essentially axis-parallel and at a radial distance with respect to the stabilizer torsion spring rod, via a coupler protruding outward radially, wherein the first and second actuator engages at the axial bar.

4. The wheel suspension according to claim 3 , wherein the gear speed has a gear wheel element arranged, in a torsionally resistant manner, on a drive shaft of the first actuator and an output-side gear wheel element meshing therewith, wherein the gear wheel element is mounted coaxially and rotatably with respect to the stabilizer torsion spring rod on its outer circumference and is connected to the axial bar in a torsionally resistant manner, so that, upon activation of the first actuator, the suspension spring foot point can be shifted in a circumferential direction in order to adjust the height of the vehicle body.

5. The wheel suspension according to claim 3 , wherein the axial bar is a spring element, wherein the effective spring length of the suspension spring is extended by the bar length of the axial bar, and the axial bar is connected to the output-side gear wheel element, in a torsionally resistant manner, with the formation of the suspension spring foot point.

6. The wheel suspension according to claim 5 , wherein the axial bar is connected to a torque support arranged in a torsionally resistant manner, with formation of the suspension spring foot point, wherein the torque support can be axially shifted by means of the second actuator, wherein the torque support can be axially shifted by the second actuator, so that, upon an axial shift of the torque support, the effective spring bar length of the axial bar can be adjusted in order to adjust the suspension spring constant.

7. The wheel suspension according to claim 6 , wherein both the first actuator and the second actuator are installed in the wheel suspension, wherein the output-side gear wheel element functions as the torque support and can be axially shifted by the second actuator.

8. The wheel suspension according to claim 7 , wherein the output-side gear wheel element is mounted rotatably on the outer circumference of the stabilizer torsion spring rod by way of an annular gear wheel support, wherein the gear wheel support is in threaded engagement with a drive spindle of the second actuator, so that, upon activation of the second actuator, the annular gear wheel support is axially shifted, along with the output-side gear wheel element mounted rotatably thereupon.

9. The wheel suspension according to claim 1 , wherein the suspension spring is a component of a spring-damper unit of the vehicle, and namely together with at least one rotational damper, which can be impacted with compression and rebound movements.

10. The wheel suspension according to claim 9 , wherein the rotational damper has a damper housing, which is formed in a rotationally resistant manner, on the vehicle body and a rotor, which is mounted so as to pivot therein around a rotor axis and which can be driven with the compression and rebound movements of the wheel suspension, wherein the damper effect occurs between the rotor and the damper housing, wherein the rotational damper is an electric rotational damper, in which the rotor interacts with a stator firmly attached to the housing.

11. The wheel suspension according to claim 10 , wherein the stabilizer torsion spring rod is mounted on at least one body-side stabilizer bearing so as to pivot, wherein the stabilizer bearing is implemented by the rotational damper, wherein the rotor of the rotational damper is implemented as a rotor ring, which is arranged, in a torsionally resistant manner, on the stabilizer torsion spring rod.

12. The wheel suspension according to claim 11 , wherein the rotational damper is arranged coaxially with respect to the suspension spring torsion spring rod and in radial alignment thereto.

13. The wheel suspension according to claim 1 , wherein the stabilizer torsion spring rod extends in the vehicle's transverse direction without interruption and/or continuously as a single piece, wherein the stabilizer torsion spring rod has a suspension spring/torsion spring rod on each side of the vehicle.

14. The wheel suspension according to claim 1 , wherein both the stabilizer torsion spring rod and the suspension spring/torsion spring rod are connected to the output lever in a manner so as to transfer power.

Assignees

• Audi Ag

Inventors

• Schindler Sebastian

Classifications

• B60G2202/42

  Electric actuator · CPC title

• B60G17/025

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

• B62D55/12

  Arrangement, location, or adaptation of driving sprockets · CPC title

• B62D55/1083 Primary

  Torsion-bar springs · CPC title

• B60G2206/427

  Stabiliser bars or tubes · CPC title