Camshaft adjusting system with flex pot for decoupling of the adjustment ranges

Patent metadata

Field	Value
Publication number	US-10865663-B2
Application number	US-201916514271-A
Country	US
Kind code	B2
Filing date	Jul 17, 2019
Priority date	Sep 20, 2018
Publication date	Dec 15, 2020
Grant date	Dec 15, 2020

Abstract

A camshaft adjusting system ( 1 ) is provided for a first camshaft ( 2 ) and a second camshaft ( 3 ) which are arranged concentrically with respect to one another, the second camshaft ( 3 ) being arranged within the first camshaft ( 2 ). A vane-cell type hydraulic camshaft adjuster ( 4 ) is configured for adjusting the first camshaft ( 2 ) and an electric camshaft adjuster ( 5 ) is configured for adjusting the second camshaft ( 3 ). A front cover ( 7 ) which is fastened to a stator ( 6 ) of the hydraulic camshaft adjuster ( 4 ) and which closes off the camshaft adjuster ( 4 ) at a side facing away from the camshaft has an internal toothing ( 8 ) for supporting a flex pot ( 9 ) which is attached to the second camshaft ( 3 ) and which is designed for receiving torque from the electric camshaft adjuster ( 5 ). A camshaft adjusting unit having the camshaft adjusting system ( 1 ) and two camshafts ( 2, 3 ) is also provided.

First claim

The invention claimed is:

1. A camshaft adjusting system for a first camshaft and a second camshaft which are arranged concentrically with respect to one another, the second camshaft being arranged within the first camshaft, the camshaft adjusting system comprising:
a vane-cell type hydraulic camshaft adjuster configured for adjusting the first camshaft and including a stator and a front cover fastened to the stator that closes off the hydraulic camshaft adjuster at a side that is adapted to be facing away from the camshafts;
an electric camshaft adjuster configured for adjusting the second camshaft;
a flex pot which is configured to be attached to the second camshaft that receives torque from the electric camshaft adjuster;
the front cover includes an internal toothing that supports the flex pot.

2. The camshaft adjusting system as claimed in claim 1 , wherein the front cover is an integral constituent part of the stator.

3. The camshaft adjusting system as claimed in claim 1 , wherein the front cover is a component that is separate from the stator.

4. The camshaft adjusting system as claimed in claim 1 , wherein the front cover includes a stop component and the internal toothing is separate from the stop component.

5. The camshaft adjusting system as claimed in claim 4 , wherein the stop component has a shoulder which prevents an axial movement of at least one of the flex pot or a rolling bearing outer shell in the flex pot in a direction of an electric motor of the electric camshaft adjuster.

6. The camshaft adjusting system as claimed in claim 4 , wherein the stop component engages around the front cover.

7. The camshaft adjusting system as claimed in claim 6 , wherein a frictional engagement is formed between the stop component and the front cover.

8. The camshaft adjusting system as claimed in claim 1 , wherein the front cover has both a stop and the internal toothing.

9. The camshaft adjusting system as claimed in claim 8 , wherein the stop includes a shoulder which prevents an axial movement of at least one of the flex pot or a rolling bearing outer shell in the flex pot in a direction of an electric motor of the electric camshaft adjuster.

10. The camshaft adjusting system as claimed in claim 1 , further comprising an adapter part for conducting oil arranged in an axial direction between a rotor of the hydraulic camshaft adjuster and the flex pot.

11. The camshaft adjusting system as claimed in claim 1 , further comprising an intermediate part by which the flex pot is adapted to be connected to the second camshaft.

12. The camshaft adjusting system as claimed in claim 1 , further comprising an Oldham coupling by which the electric camshaft adjuster is adapted to be connected to the second camshaft.

13. A camshaft adjusting unit comprising the camshaft adjusting system as claimed in claim 1 and the first and second camshafts which are arranged concentrically with respect to one another.

14. A camshaft adjusting system comprising:
a first camshaft;
a second camshaft arranged concentrically inside the first camshaft;
a vane-cell type hydraulic camshaft adjuster connected to the first camshaft and configured to adjust a relative rotational position of the first camshaft, the hydraulic camshaft adjuster including a stator and a front cover fastened to the stator that closes off the hydraulic camshaft adjuster at a side that is adapted to be facing away from the camshafts;
an electric camshaft adjuster connected to the second camshaft and configured to adjust a relative rotational position of the second camshaft;
a flex pot by which the second camshaft is connected to the electric camshaft adjuster, the flex pot receives torque from the electric camshaft adjuster; and
the front cover includes an internal toothing that supports the flex pot.

15. The camshaft adjusting unit as claimed in claim 14 , wherein the front cover is an integral constituent part of the stator.

16. The camshaft adjusting unit as claimed in claim 14 , wherein the front cover includes a stop component and the internal toothing which is separate from the stop component.

17. The camshaft adjusting unit as claimed in claim 16 , wherein the stop component has a shoulder which prevents an axial movement of at least one of the flex pot or a rolling bearing outer shell in the flex pot in a direction of an electric motor of the electric camshaft adjuster.

18. The camshaft adjusting unit as claimed in claim 14 , wherein the front cover has both a stop and the internal toothing.

19. The camshaft adjusting unit as claimed in claim 18 , wherein the stop includes a shoulder which prevents an axial movement of at least one of the flex pot or a rolling bearing outer shell in the flex pot in a direction of an electric motor of the electric camshaft adjuster.

Assignees

• Schaeffler Technologies Ag

Inventors

• Weber Jurgen
• Hildebrand Marco
• Heise Daniel

Classifications

• F01L1/3442 Primary

  using hydraulic chambers with variable volume to transmit the rotating force · CPC title

• F01L1/12 Primary

  Transmitting gear between valve drive and valve (simultaneously operating two or more valves F01L1/26) · CPC title

• F01L2001/0473

  Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod · CPC title

• F01L2001/34469

  Lock movement parallel to camshaft axis · CPC title

• F01L25/08

  by electric or magnetic means · CPC title