Clutch arrangement

Patent metadata

Field	Value
Publication number	US-9964157-B2
Application number	US-201514865470-A
Country	US
Kind code	B2
Filing date	Sep 25, 2015
Priority date	Mar 28, 2013
Publication date	May 8, 2018
Grant date	May 8, 2018

Abstract

A clutch arrangement includes a first shaft, a second shaft arranged coaxially to the first shaft, and a clutch for connecting the first shaft to the second shaft without play. An axis of rotation is defined in accordance with the two shafts, a circumferential direction is defined around the axis of rotation, and a radial direction is defined perpendicularly to the axis of rotation. In addition, the clutch includes at least one displacement element and at least one clutch element which is displaceable relative to the two shafts in the circumferential direction and/or in the radial direction, and wherein the displacement element is designed to press the clutch element against the first and/or second shaft without play in the circumferential direction and/or in the radial direction in order to compensate for play between the two shafts in circumferential direction and for inevitable manufacturing tolerances of axial and angular offsets of the two shafts.

First claim

What is claimed is:

1. A coupling arrangement comprising
a first shaft configured as a crankshaft of an internal combustion engine;
a second shaft configured as an armature shaft of an electric machine, wherein the second shaft is arranged coaxially with respect to the first shaft; and
a coupling configured to connect the first shaft to the second shaft without play,
wherein an axis of rotation is defined in accordance with the coaxially-arranged first shaft and second shaft, a circumferential direction is defined about the axis of rotation, and a radial direction is defined perpendicular to the axis of rotation,
wherein said coupling comprises: at least one motion element and at least one coupling element which is movable relative to the first shaft and second shaft in at least one of the circumferential direction and the radial direction, and at least one sleeve having an engaged state that prevents such movement, and a disengaged state that permits such movement, and
wherein the motion element is configured to compensate for play in the circumferential direction between the first shaft and second shaft by pressing the coupling element against at least one of the first shaft and second shaft without play in at least one of the circumferential direction and radial direction.

2. The coupling arrangement as claimed in claim 1 , wherein the motion element is at least one of a spring and a hydraulic pressure chamber.

3. The coupling arrangement as claimed in claim 1 , wherein the coupling is configured as an Oldham coupling and comprises a rotating main body,
wherein the first shaft and second shaft each have a groove, and the main body engages by way of projections into the grooves,
wherein at least one coupling element is formed by a piston which is mounted in the main body so as to be movable in a radial direction.

4. The coupling arrangement as claimed in claim 3 , wherein the motion element is at least one of a spring and a hydraulic pressure chamber, wherein the motion element forces the piston away from the main body, such that the piston abuts against the first shaft or second shaft.

5. The coupling arrangement as claimed in claim 4 , wherein a plurality of pistons that are movable in a radial direction are arranged on a side of the main body that faces toward the first shaft and on a side of the main body that faces toward the second shaft.

6. The coupling arrangement as claimed in claim 3 , wherein a plurality of pistons that are movable in a radial direction are arranged on a side of the main body that faces toward the first shaft and on a side of the main body that faces toward the second shaft.

7. The coupling arrangement as claimed in claim 1 , wherein the coupling is a claw coupling comprising:
a first ring arranged rotationally conjointly on the first shaft and which has first claws;
a second ring arranged rotationally conjointly on the second shaft and which has second claws; and
a compensation ring which is arranged between the first and second shafts and which has compensation claws,
wherein the first claws, the second claws and the compensation claws engage with one another and, as viewed in the circumferential direction, in each case one compensation claw is arranged between a first claw and a second claw, and
wherein, between at least one second claw and one compensation claw, there is arranged a spring for pressing the second claws against the first claws.

8. The coupling arrangement as claimed in claim 1 , wherein the coupling comprises, as coupling elements, a first toothed shaft, a second toothed shaft and a third toothed shaft arranged between the first toothed shaft and the second toothed shaft, wherein the three toothed shafts are arranged coaxially with respect to the axis of rotation, wherein the first toothed shaft is connected to the second toothed shaft by way of a torsion spring.

9. The coupling arrangement as claimed in claim 8 , wherein
the first shaft comprises a first shaft toothing, and
the second shaft comprises a second shaft toothing,
wherein the first shaft toothing meshes with the first toothed shaft and simultaneously with the third toothed shaft, and
wherein the second shaft toothing meshes with the second toothed shaft and simultaneously with the third toothed shaft.

10. The coupling arrangement as claimed in claim 9 , wherein the first toothed shaft and the second toothed shaft are each connected rotationally conjointly to the torsion spring, and the third toothed shaft is arranged so as to be rotatable relative to the torsion spring.

11. The coupling arrangement as claimed in claim 8 , wherein the first toothed shaft and the second toothed shaft are each connected rotationally conjointly to the torsion spring, and the third toothed shaft is arranged so as to be rotatable relative to the torsion spring.

12. The coupling arrangement as claimed in claim 8 , wherein the third toothed shaft is internally hollow, and the torsion spring extends through the third toothed shaft.

13. A method for mounting a coupling arrangement as claimed in claim 8 , the method comprising the acts of:
bracing the torsion spring by rotating the first toothed shaft relative to the second toothed shaft;
inserting a first rotation prevention means that fixes the first toothed shaft relative to the third toothed shaft;
inserting a second rotation prevention means that fixes the second toothed shaft relative to the third toothed shaft;
mounting the first toothed shaft on the first shaft;
mounting the second toothed shaft on the second shaft; and
releasing the two rotation prevention means.

14. The method as claimed in claim 13 , wherein the first rotation prevention means comprises a first sleeve that is pushed on and, for fixing purposes, meshes simultaneously with the toothings of the first toothed shaft and of the third toothed shaft.

15. The method as claimed in claim 14 , wherein the second rotation prevention means comprises a second sleeve that is pushed on and, for fixing purposes, meshes simultaneously with the toothings of the second toothed shaft and of the third toothed shaft.

16. The method as claimed in claim 15 , wherein, during the mounting of the second toothed shaft on the second shaft, the second sleeve is pushed fully onto the third toothed shaft.

17. The method as claimed in claim 14 , wherein, during the mounting of the first toothed shaft on the first shaft, the first sleeve is pushed fully onto the third toothed shaft.

18. The method as claimed in claim 13 , wherein, the first rotation prevention means comprises at least one first pin that is pushed in and, for fixing purposes, engages simultaneously into the first toothed shaft and into the third toothed shaft.

19. The method as claimed in claim 18 , wherein, during the mounting of the first toothed shaft on the first shaft, the at least one first pin is pushed fully into the third toothed shaft.

20. The method as claimed in claim 13 , wherein, the second rotation prevention means comprises at least one second pin that is pushed in and, for fixing purposes, engages simultaneously into the second toothed shaft and into the third toothed shaft.

21. The method as claimed in claim 20 , wherein, during the mounting of the second toothed shaft on the second shaft, the at least one second pin is pushed fully into the third toothed shaft.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Kallich Stefan

Classifications

• Y10T403/7032

  including a means, e.g., spring biased portion, for misalignment correction · CPC title

• F16D3/10

  Couplings with means for varying the angular relationship of two coaxial shafts during motion · CPC title

• Y10T29/49874

  Prestressing rod, filament or strand · CPC title

• F16D1/02

  for connecting two abutting shafts or the like · CPC title

• F16D3/04 Primary

  specially adapted to allow radial displacement, e.g. Oldham couplings · CPC title