Locking clearance setting device for camshaft phaser

Patent metadata

Field	Value
Publication number	US-10066519-B2
Application number	US-201615341561-A
Country	US
Kind code	B2
Filing date	Nov 2, 2016
Priority date	Nov 2, 2016
Publication date	Sep 4, 2018
Grant date	Sep 4, 2018

Abstract

A camshaft phaser including a locking clearance setting pin is provided. The camshaft phaser includes a stator including a first plurality of pin holes extending axially in at least one of the radially inwardly extending lobes arranged along an arcuate path. A locking cover engages against a first axial end face of the stator and includes a locking pin bore and a second plurality of pin holes arranged along the arcuate path and angularly spaced apart from one another by a different angular spacing than the first plurality of pin holes. A pin extends through a respective one of the first plurality of pin holes and a corresponding one of the second plurality of pin holes, such that a location of the pin sets an angular adjustment of the locking pin bore relative to the stator.

First claim

What is claimed is:

1. A camshaft phaser comprising:
a stator including an outer circumferential wall with radially inwardly extending lobes circumferentially spaced apart from each other, at least one first bolt hole extending axially through at least one of the radially inwardly extending lobes, and a first plurality of pin holes extending axially in at least one of the radially inwardly extending lobes arranged along an arcuate path;
a rotor arranged within the stator including radially outwardly extending vanes, each of the vanes being arranged between an adjacent pair of the radially inwardly extending lobes of the stator to define an advance chamber and a retard chamber on opposite sides of each of the vanes between the stator and the rotor;
a locking cover engaged against a first axial end face of the stator, the locking cover including a locking pin bore, at least one second bolt hole, and a second plurality of pin holes arranged along the arcuate path and spaced apart from one another by a different angular spacing than the first plurality of pin holes;
a sealing cover engaged against a second axial end face of the stator, the sealing cover including at least one third bolt hole;
at least one bolt extending through the at least one first bolt hole of the stator, the at least one second bolt hole of the locking cover, and the at least one third bolt hole of the sealing cover; and
a pin extending through a respective one of the first plurality of pin holes and one of the second plurality of pin holes, such that a location of the pin sets an angular adjustment of the locking pin bore relative to the stator.

2. The camshaft phaser of claim 1 , wherein the pin includes rounded axial ends.

3. The camshaft phaser of claim 1 , wherein the first plurality of pin holes are blind holes.

4. The camshaft phaser of claim 1 , wherein the first plurality of pin holes extend between the first and second axial end faces of the stator.

5. The camshaft phaser of claim 1 , wherein the at least one bolt includes four bolts, the at least one first bolt hole includes four first bolt holes, each one of the four first bolt holes are arranged on a respective one of the radially inwardly extending lobes, the at least one second bolt hole includes four second bolt holes, the at least one third bolt hole includes four third bolt holes, and each one of the four bolts is arranged within a respective one of the four first bolt holes, a respective one of the four second bolt holes, and a respective one of the four third bolt holes.

6. The camshaft phaser of claim 1 , wherein the pin is fixed within the respective one of the first plurality of pin holes and the respective one of the second plurality of pin holes by an interference fit.

7. The camshaft phaser of claim 1 , wherein the sealing cover further comprises a third plurality of pin holes arranged along the arcuate path.

8. The camshaft phaser of claim 7 , wherein each of the first plurality of pin holes are spaced apart from each other by a first angular distance, and each of the second plurality of pin holes and each of the third plurality of pin holes are spaced apart from each other by a second angular distance that is different than the first angular distance.

9. The camshaft phaser of claim 7 , wherein the first plurality of pin holes, the second plurality of pin holes, and the third plurality of pin holes each consist of three pin holes.

10. The camshaft phaser of claim 7 , wherein there are two first sets of first plurality of pin holes, each of the two first sets of the first plurality of pin holes is located in a different one of the lobes, there are two second sets of the second plurality of pin holes, and there are two third sets of the third plurality of pin holes.

11. The camshaft phaser of claim 10 , wherein two of the pins are provided, and each one of the two pins is arranged in a respective pin hole of each of the two first sets of the first pair of the first plurality of pin holes, in a respective pin hole of each of the two second sets of the second plurality of pin holes, and in a respective pin hole of each of the two third sets of the third plurality of pin holes.

12. A method for setting a locking clearance of a camshaft phaser, the method comprising:
providing a stator including an outer circumferential wall with radially inwardly extending lobes circumferentially spaced apart from each other, at least one first bolt hole extending axially through at least one of the radially inwardly extending lobes, and a first plurality of pin holes extending axially in at least one of the radially inwardly extending lobes arranged along an arcuate path; a rotor arranged within the stator including radially outwardly extending vanes, each of the vanes being arranged between an adjacent pair of the radially inwardly extending lobes of the stator to define an advance chamber and a retard chamber on opposite sides of each of the vanes between the stator and the rotor; a locking cover engaged against a first axial end face of the stator, the locking cover including a locking pin bore, at least one second bolt hole, and a second plurality of pin holes arranged along the arcuate path and angularly spaced apart from one another by a different angular spacing than the first plurality of pin holes; a sealing cover engaged against a second axial end face of the stator, the sealing cover including at least one third bolt hole; at least one bolt extending through the at least one first bolt hole of the stator, the at least one second bolt hole of the locking cover, and the at least one third bolt hole of the sealing cover; and a pin;
inserting the pin through a respective one of the first plurality of pin holes and one of the second plurality of pin holes; and
setting an angular adjustment of the locking pin bore relative to the stator by positioning the pin within the respective one of the first plurality of pin holes and one of the second plurality of pin holes.

Assignees

• Schaeffler Technologies Ag

Inventors

• Camilo Alexandre
• De Oliveira Ghiraldi Renato

Classifications

• F01L2303/02

  Initial camshaft settings · CPC title

• F01L2303/00

  Manufacturing of components used in valve arrangements · CPC title

• F01L2820/01

  Absolute values · CPC title

• F01L2810/04

  Reducing noise · CPC title

• F01L1/3442 Primary

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