Sheet metal locking cover for a cam phaser

Patent metadata

Field	Value
Publication number	US-10167747-B2
Application number	US-201615338309-A
Country	US
Kind code	B2
Filing date	Oct 28, 2016
Priority date	Oct 28, 2016
Publication date	Jan 1, 2019
Grant date	Jan 1, 2019

Abstract

A cam phaser includes a stator, a rotor positioned in the stator, a cover plate positioned on a first side of the stator, a locking cover positioned on a second side of the stator, a locking pin assembly configured to selectively lock the rotor in a position relative to the stator, a plurality of aligned first openings which extend through the stator, the cover plate, and the locking cover, a plurality of fasteners respectively inserted in the plurality of aligned first openings, and a plurality of aligned central openings forming a throughbore. The locking cover has a body made from sheet metal having a first axial side, a second axial side, a plurality of the first openings extending from the first axial side to the second axial aide, and a second opening extending from the first axial side to the second axial side. The body has a web portion and a plurality of reinforcing portions which are thicker than the web portion.

First claim

What is claimed is:

1. A cam phaser, comprising
a stator;
a rotor positioned in the stator;
a cover plate positioned on a first side of the stator;
a locking cover positioned on a second side of the stator;
a locking pin assembly configured to selectively lock the rotor in a position relative to the stator;
a plurality of aligned first openings which extend through the stator, the cover plate, and the locking cover;
a plurality of fasteners respectively inserted in the plurality of aligned first openings; and
a plurality of aligned central openings forming a throughbore,
wherein the locking cover includes a body made of sheet metal having a first axial side, a second axial side, the plurality of first openings extending from the first axial side to the second axial aide, and a second opening extending from the first axial side to the second axial side that is adapted to receive at least a portion of the locking pin assembly, and a boss surrounds the second opening, and
wherein the body includes a web portion and a plurality of reinforcing portions which are thicker than the web portion, and the plurality of reinforcing portions includes the boss which surrounds the second opening.

2. The cam phaser of claim 1 , wherein the plurality of reinforcing portions include a rim which extends around a perimeter of the body.

3. The cam phaser of claim 1 , wherein the plurality of reinforcing portions include a plurality of bosses which respectively surround the plurality of first openings in the locking cover.

4. The cam phaser of claim 1 , wherein the locking pin assembly comprises a pin, a spring, a movable locking part, and a bushing, and the bushing is positioned in the second opening of the locking cover.

5. The cam phaser of claim 4 , wherein the bushing includes an open end and a closed end, the closed end being flush with a rim of the boss on the first axial side and the open end being flush with the body on the second axial side.

6. The cam phaser of claim 4 , wherein a thickness of the bushing from an open end to a closed end is greater than a thickness of the web portion.

7. The cam phaser of claim 6 , wherein the thickness of the bushing is equal to a thickness of one of the plurality of reinforcing portions.

8. The cam phaser of claim 1 , wherein the first axial side includes the plurality of reinforcing portions and the second axial side is planar.

9. The cam phaser of claim 8 , wherein the second axial side is positioned flat against the stator.

10. A method of manufacturing a cam phaser which includes a stator, a rotor, a cover plate, a locking cover, a locking pin assembly, and a plurality of fasteners, the method comprising
deep drawing a sheet metal blank to produce the locking cover which includes a body comprising a web portion and a plurality of reinforcing portions which are thicker than the web portion;
stamping the blank to produce a plurality of first openings, a central opening, and a second opening, the second opening adapted to receive at least a portion of the locking pin assembly, and the plurality of reinforcing portions includes a boss which surrounds the second opening; and
assembling the cam phaser, comprising:
positioning a bushing and a movable locking part in the second opening,
positioning the locking cover adjacent to the stator, and
inserting a plurality of fasteners through aligned openings in the cover plate, stator, and locking cover, the aligned openings including the plurality of first openings.

11. The method of claim 10 , wherein the plurality of reinforcing portions include a rim which extends around a perimeter of the body.

12. The method of claim 10 , wherein the plurality of reinforcing portions include a plurality of bosses which respectively surround the plurality of first openings.

13. The method of claim 10 , wherein the bushing includes an open end and a closed end, the closed end being flush with a rim of the boss on a first axial side and the open end being flush with the body on a second axial side.

14. The method of claim 10 , wherein the locking cover includes a first axial side and a second axial side, wherein the first axial side includes the plurality of reinforcing portions and the second axial side is planar.

15. The method of claim 14 , wherein the second axial side is positioned flat against the stator.

16. The method of claim 10 , wherein a thickness of the bushing from an open end to a closed end is greater than a thickness of the web portion.

17. The method of claim 16 , wherein the thickness of the bushing is equal to a thickness of one of the plurality of reinforcing portions.

18. A cam phaser, comprising
a stator;
a rotor positioned in the stator;
a cover plate positioned on a first side of the stator;
a locking cover positioned on a second side of the stator;
a locking pin assembly configured to selectively lock the rotor in a position relative to the stator and including a pin, a spring, a movable locking part, and a bushing;
a plurality of aligned first openings which extend through the stator, the cover plate, and the locking cover;
a plurality of fasteners respectively inserted in the plurality of aligned first openings; and
a plurality of aligned central openings forming a throughbore,
wherein the locking cover includes a body made from sheet metal having a first axial side, a second axial side, the plurality of first openings extending from the first axial side to the second axial aide, and a second opening extending from the first axial side to the second axial side,
wherein the body includes, on the first axial side, a web portion and a plurality of reinforcing portions which are thicker than the web portion, and the second axial side is planar,
wherein the plurality of reinforcing portions include a rim which extends around a perimeter of the body and a plurality of bosses which respectively surround the plurality of first openings in the locking cover and the second opening, and
wherein the bushing is positioned in the second opening, and wherein a thickness of the bushing is equal to a thickness of one of the plurality of reinforcing portions in an area of a boss that surrounds the second opening.

Assignees

• Schaeffler Technologies Ag

Inventors

• De Oliveira Ghiraldi Renato
• Camilo Alexandre

Classifications

• F01L2303/00

  Manufacturing of components used in valve arrangements · CPC title

• F01L2301/00

  Using particular materials · CPC title

• F01L2001/34469

  Lock movement parallel to camshaft axis · CPC title

• F01L1/3442 Primary

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

• F01L2001/34479

  Sealing of phaser devices · CPC title