Wheel suspension for a motor vehicle

• US 8,573,604 B2
• Filed: 07/20/2011
• Issued: 11/05/2013
• Est. Priority Date: 08/21/2010
• Status: Active Grant

• Current Assignee: Audi AG (Volkswagen AG)
• Original Assignee: Audi AG (Volkswagen AG)
• Inventors: Willems, Marco
• Primary Examiner(s): ROCCA, JOSEPH M
• Application Number:
  US13/818,029
• Publication Number:
  US 20130154277A1
• Time in Patent Office: 839 Days
• Field of Search: 280/5.5, 280/5.507, 280/5.508, 280/5.509, 280/5.51, 280/5.513, 280/5.515, 280/5.519, 180/165, 310/20, 310/90, 322/3, 188/266
• US Class Current: 280/5.5
• CPC Class Codes: B60G 13/14 having dampers accumulating utilisable energy, e.g. compressing air fluid springs with an accumulator B60G11/30
• CPC Class Codes: B60G 17/0157 non-fluid unit, e.g. electric motor
• CPC Class Codes: B60G 2200/144 with two lateral arms forming a parallelogram
• CPC Class Codes: B60G 2202/22 Rotary Damper
• CPC Class Codes: B60G 2202/42 Electric actuator
• CPC Class Codes: B60G 2204/4192 rack and pinion
• CPC Class Codes: B60G 2300/60 Vehicles using regenerative power
• CPC Class Codes: F16F 15/03 using magnetic or electromagnetic means F16F9/53, F16F15/005 take precedence
• CPC Class Codes: H02K 35/00 Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit arrangements for handling mechanical energy structurally associated with generators H02K7/00, e.g. H02K7/06
• CPC Class Codes: H02K 7/116 with gears
• CPC Class Codes: H02K 7/1853 driven by intermittent forces

Abstract

A wheel suspension for a motor vehicle includes an electric vibration damper which is affixed to the vehicle body and which has a generator that can be driven by translational wheel movements of the vehicle wheel in order to generate an induced voltage. The stator and the rotor of the generator are interconnected via at least one gear stage, wherein a gear element of the gear stage is a drive gear wheel of a rack-and-pinion drive that is drivingly connected to a wheel carrier of the wheel suspension, with the wheel carrier following the wheel movements.

Claims

1. A wheel suspension for a motor vehicle, comprising:

an electric vibration damper having a generator attached on a vehicle body of the motor vehicle and comprising a stator and a rotor, wherein the generator is driven by translational wheel movements of a vehicle wheel for generating an induced voltage, and

at least one gear stage interconnecting the stator and the rotor, with the at least one gear stage comprising a gear element constructed as a drive gear wheel of a rack-and-pinion drive, wherein the rack-and-pinion drive is drivingly connected with a wheel carrier of the wheel suspension, with the wheel carrier following the translational wheel movements.

2. The wheel suspension of claim 1, wherein the rack-and-pinion drive comprises a wheel guide element extending between the wheel carrier and the vehicle body, wherein the wheel guide element is in meshing engagement with the drive gear by way of a rack portion of the rack-and-pinion drive.

3. The wheel suspension of claim 2, wherein the wheel guide element comprises a control arm selected from a transverse control arm and a longitudinal control arm.

4. The wheel suspension of claim 2, wherein the rack-and-pinion drive forms a pivot point between the wheel guide element and the vehicle body.

5. The wheel suspension of claim 4, wherein the pivot point is formed at an end of the wheel guide element distal from the wheel carrier.

6. The wheel suspension of claim 4, further comprising a pivot bearing pivotally connecting the wheel guide element to the wheel carrier.

7. The wheel suspension of claim 2, wherein the drive gear wheel of the rack-and-pinion drive is seated on the stator in fixed rotational engagement.

8. The wheel suspension of claim 2, wherein the at least one gear stage is constructed as a planetary gear.

9. The wheel suspension of claim 8, wherein a first of the at least one gear stage comprises a radially outer ring gear constructed as a one-piece unit with the stator of the generator.

10. The wheel suspension of claim 8, wherein a first of the at least one gear stage comprises a radially outer ring gear operating as an input element of the first gear stage and constructed to introduce drive torques into the first gear stage.

11. The wheel suspension of claim 8, wherein the planetary gear comprises a radially inner sun gear operating as an output element, which is seated in fixed rotational engagement on a rotor shaft or is connected in fixed rotational engagement to an input element of a second gear stage of the at least one gear stage.

12. The wheel suspension of claim 11, wherein the sun gear of a first of the at least one gear stage is connected in fixed rotational engagement with a planetary gear carrier of the second gear stage operating as the input element.

13. The wheel suspension of claim 12, wherein a ring gear of the planetary gear of the second gear stage is supported in fixed rotational engagement on the vehicle body.

14. The wheel suspension of claim 13, wherein a sun gear of the planetary gear of the second gear stage operates as an output element that is connected to a rotor shaft of the generator.

15. The wheel suspension of claim 8, wherein a first of the at least one gear stage comprises a planetary gear carrier which is supported in fixed rotational engagement on the vehicle body.

16. The wheel suspension of claim 1, wherein the drive gear wheel of the rack-and-pinion drive is seated on a rotor shaft of the generator in fixed rotational engagement.

17. The wheel suspension of claim 16, wherein a rack portion of the rack-and-pinion drive comprises a first toothing and a second toothing arranged on opposite sides of the rack portion.

18. The wheel suspension of claim 17, wherein the first toothing drives a first drive gear wheel seated on the rotor shaft and the second toothing drives a second drive gear wheel seated on the stator.