Regenerative drive system

Patent metadata

Field	Value
Publication number	US-10518645-B2
Application number	US-201615553468-A
Country	US
Kind code	B2
Filing date	Feb 17, 2016
Priority date	Feb 25, 2015
Publication date	Dec 31, 2019
Grant date	Dec 31, 2019

Abstract

A regenerative drive system for generating a rotary movement, which is in the form of a direct hub drive and includes an electric machine that works on the piezoelectric principle, more particularly in the form of a swash plate motor is provided. The drive system can be fitted in vehicles such as box trucks, truck tractors and trailer vehicles.

First claim

What is claimed is:

1. A drive apparatus with recuperation capability for generating a rotational movement for a vehicle, comprising:
a hub direct drive, wherein
the hub direct drive comprises an electric machine which operates in accordance with a piezoelectric operating principle,
the drive apparatus has at least three actuators which operate in accordance with the piezoelectric operating principle and which are arranged with a 120° pitch on an effective diameter DW, and
the at least three actuators have in each case one housing.

2. The drive apparatus as claimed in claim 1 , wherein
the housing has slots in a radial circumferential direction.

3. The drive apparatus as claimed in claim 1 , wherein
the drive apparatus has two groups of actuators with in each case at least three actuators.

4. The drive apparatus as claimed in claim 3 , wherein
the actuators of the first group have an opposite direction of action to the second group of actuators.

5. The drive apparatus as claimed in claim 3 , wherein
the at least three actuators of the first group are arranged with a 120° pitch, and the actuators of the second group, which are likewise arranged with a 120° pitch, are offset by 60° in relation to the actuators of the first group.

6. The drive apparatus as claimed in claim 3 , wherein
the two groups of actuators with in each case at least three actuators are inserted in an actuator housing.

7. The drive apparatus as claimed in claim 6 , wherein the actuator housing has cooling fins on an outer wall.

8. The drive apparatus as claimed in claim 6 , wherein
the actuator housing surrounds the actuators radially in each case in the manner of a housing and axially at in each case one end of the actuators.

9. The drive apparatus as claimed in claim 6 , wherein the actuator housing is extended through by a supporting column.

10. The drive apparatus as claimed in claim 9 , wherein the supporting column is extended through by a central bolt.

11. The drive apparatus as claimed in claim 10 , wherein the central bolt has a head part.

12. The drive apparatus as claimed in claim 11 , wherein the central bolt has a shank, a threaded section and a passage bore.

13. The drive apparatus as claimed in 11 , wherein
the drive apparatus has a seal which surrounds the head part and Which is fastened to the actuator housing.

14. The drive apparatus as claimed in claim 10 , wherein the actuator-force-conducting components are subjectable to a preload by way of the central bolt.

15. The drive apparatus as claimed in claim 10 , wherein the central bolt is made from a tempering steel of quality 10.9 or 12.9.

16. The drive apparatus as claimed in claim 9 , wherein the supporting column is made from a technical ceramic material.

17. The drive apparatus as claimed in claim 9 , wherein the supporting column is made from silicon carbide (SiC).

18. The drive apparatus as claimed in claim 6 , wherein the actuator housing is made from a material with low density and high modulus of elasticity.

19. The drive apparatus as claimed in claim 6 , wherein the actuator housing is made from a technical ceramic material.

20. The drive apparatus as claimed in claim 19 , wherein the actuator housing is made from silicon carbide (SiC).

21. The drive apparatus as claimed in claim 3 , wherein the drive apparatus has a swash plate.

22. The drive apparatus as claimed in claim 21 , wherein
the actuators of the first group act directly, and the actuators of the second group act indirectly, on the swash plate.

23. The drive apparatus as claimed in 22 , wherein
the actuators of the second group act directly, and the actuators of the first group act indirectly, on a head part of the central bolt.

24. The drive apparatus as claimed in claim 23 , wherein the actuators act periodically on the head part of the central bolt.

25. The drive apparatus as claimed in claim 24 , wherein
the actuators act periodically on the head part of the central bolt in accordance with a sinusoidal function which is phase-offset by 120°.

26. The drive apparatus as claimed in claim 22 , wherein
the actuators of the second group are actuated, in relation to a phase position of the actuation of the actuators of the first group, so as to yield a maximum overlap of the strokes of the actuators.

27. The drive apparatus as claimed in claim 22 , wherein
the actuators of the second group are actuated, in relation to the phase position of the actuation of the actuators of the first group, so as to yield a maximum action of force of the actuators on the swash plate.

28. The drive apparatus as claimed in claim 22 , wherein the swash plate has a toothing.

29. The drive apparatus as claimed in claim 28 , wherein the swash plate has a spur toothing.

30. The drive apparatus as claimed in claim 28 , wherein the drive apparatus has a drive disk.

31. The drive apparatus as claimed in claim 30 , wherein the drive disk has a toothing.

32. The drive apparatus as claimed in claim 31 , wherein the toothing of the swash plate interacts or meshes with the toothing of the drive disk.

33. The drive apparatus as claimed in claim 32 , wherein the toothing of the swash plate and the toothing of the drive disk have a modulus of 0.25 to 0.7.

34. The drive apparatus as claimed in claim 30 , wherein the drive apparatus has an anchor plate.

35. The drive apparatus as claimed in claim 34 , wherein the anchor plate has a spur toothing.

36. The drive apparatus as claimed in claim 35 , wherein
a spur toothing of the swash plate geometrically corresponds to the spur toothing of the anchor plate.

37. The drive apparatus as claimed in 34 , wherein the drive apparatus has a pivot bearing between the swash plate and the drive disk.

38. The drive apparatus as claimed in claim 37 , wherein the pivot bearing involves rolling contact.

39. The drive apparatus as claimed in claim 38 , wherein
the rolling contact is formed by: a component with spherical-sector-shaped geometry, which is inserted into a stepped bore of the swash plate, and a spherical-sector-shaped depression of the drive disk, between which there is arranged a bearing cage in which rolling bearing balls are held.

40. The drive apparatus as claimed in claim 39 , wherein
the drive apparatus has a spring element between the base of the stepped bore of the swash plate and the component with spherical-sector-shaped geometry.

41. The drive apparatus as claimed in claim 40 , wherein the spring element is a plate spring.

42. The drive apparatus as claimed in claim 41 , wherein
the plate spring is supported on the base of the stepped bore of the swash plate and acts with its spring force against the component with spherical-sector-shaped geometry.

43. The drive apparatus as claimed in claim 41 , wherein
the drive apparatus has a ring between the component with spherical-sector-shaped geometry and the plate spring.

44. The drive apparatus as claimed in claim 30 , wherein a transmission of torque between the drive disk and a wheel hub is realized via a freewheel-like rolle

Assignees

• Knorr Bremse Systeme Fuer Nutzfahrzeuge Gmbh

Inventors

• Baumgartner Johann

Classifications

• H02N2/005

  Mechanical details, e.g. housings (casings for dynamo-electric machines H02K5/00) · CPC title

• B60Y2400/209

  Piezoelectric elements · CPC title

• B60K2001/006

  the electric motors · CPC title

• F16H23/02

  with adjustment of throw by changing the position of the wobble-member (gearings in which the transmission ratio is changed by adjustment of a wobble-plate F16H29/04; gearings with gyroscopic action, e.g. comprising wobble-plates F16H33/10) · CPC title

• B60K2007/0092

  the motor axle being coaxial to the wheel axle · CPC title