Wheel suspension for a motor vehicle

Patent metadata

Field	Value
Publication number	US-9469174-B2
Application number	US-201414768017-A
Country	US
Kind code	B2
Filing date	Jan 16, 2014
Priority date	Feb 16, 2013
Publication date	Oct 18, 2016
Grant date	Oct 18, 2016

Abstract

The invention relates to a wheel suspension for a motor vehicle, said wheel suspension having a multi-link assembly ( 21 ) of links that are hinged to the vehicle body, in particular to a subframe ( 1 ) of the vehicle body, and to a hub carrier ( 23 ), and having a rotary actuator ( 27 ) for active chassis control, said rotary actuator having a motor-gear unit ( 29 ) with which torques can be transmitted, via at least one torsion bar ( 31 ), as adjusting forces to said multi-link assembly ( 21 ). According to the invention, at least one of the links ( 14, 16 ) of the multi-link assembly ( 21 ) limits, in the longitudinal direction (x) of the vehicle towards the front or towards the back, a free space ( 39 ) in which said motor-gear unit ( 29 ) of the rotary actuator ( 27 ) is at least partially arranged.

First claim

What is claimed is:

1. A wheel suspension for a motor vehicle, comprising:
a multi-link assembly of links adapted for articulation to a vehicle body and a wheel carrier, at least one of the links of the multi-link assembly configured to limit a free space in a vehicle longitudinal direction towards a front or rear, wherein the multi-link assembly is articulated to a subframe of the vehicle body; and
a rotary actuator configured for active suspension control, said rotary actuator including a torsion bar and a motor-gear unit configured to transmit a torque via the torsion bar as actuating force onto the multi-link assembly, said motor-gear unit being arranged, at least in part, in the free space, wherein the motor-gear unit is arranged beneath a longitudinal member of the subframe, with the torsion bar of the rotary actuator being aligned with a course of the longitudinal member.

2. The wheel suspension of claim 1 , wherein the free space for the motor-gear unit of the rotary actuator is provided in the vehicle longitudinal direction between a first one of the links and a second one of the links of the multi-link assembly.

3. The wheel suspension of claim 2 , wherein the multi-link assembly is a five-link assembly, said first and second links being lower links of the five-link assembly.

4. The wheel suspension of claim 1 , further comprising an output lever attached to one of the links of the multi-link assembly.

5. The wheel suspension of claim 4 , further comprising a coupling rod configured to connect the output lever to the one of the links of the multi-link assembly.

6. The wheel suspension of claim 5 , wherein the one of the links of the multi-link assembly is an upper link, the output lever and the coupling rod being arranged below the upper link.

7. The wheel suspension of claim 4 , wherein the one of the links of the multi-link assembly is an upper link.

8. The wheel suspension of claim 7 , wherein the free space for the motor-gear unit is limited upwardly by the upper link.

9. The wheel suspension of claim 7 , wherein the upper link is arranged in the vehicle longitudinal direction between a first lower one of the links and a second lower one of the links of the multi-link assembly.

10. The wheel suspension of claim 4 , wherein the output lever is configured to project at a right angle from the torsion bar into the free space for the motor-gear unit.

11. The wheel suspension of claim 1 , wherein the motor-gear unit of the rotary actuator is arranged in coaxial relationship to the torsion bar.

12. The wheel suspension of claim 1 , wherein the motor-gear unit includes a transmission gear arranged in coaxial relationship to the torsion bar.

13. The wheel suspension of claim 1 , wherein the torsion bar and the motor-gear unit are aligned in the vehicle longitudinal direction.

14. The wheel suspension of claim 1 , wherein the motor-gear unit has a transmission gear and a motor which is arranged at a radial distance to the torsion rod, said motor being in driving relationship with the transmission gear.

15. The wheel suspension of claim 14 , wherein the motor-gear unit has an intermediate gear, said motor being in driving relationship with the transmission gear via the intermediate gear.

16. The wheel suspension of claim 1 , wherein the motor-gear unit has a motor which is arranged in the free space.

17. The wheel suspension of claim 1 , wherein the rotary actuator is arranged with its rotation axis below an articulated shaft guided to a vehicle wheel as well as a wheel center.

Assignees

• Audi Ag

Inventors

• Mohrlock Dominik
• Goldberg Ruben
• Schindler Andreas

Classifications

• B60G2204/1224

  End mounts of stabiliser on wheel suspension · CPC title

• B60G2204/422

  Links for mounting suspension elements · CPC title

• B60G3/20

  all arms being rigid · CPC title

• B60G11/181

  arranged in a plane parallel to the longitudinal axis of the vehicle · CPC title

• B60G11/20

  characterised by means specially adapted for attaching the spring to axle or sprung part of the vehicle · CPC title