Bearing device, a sensor-bearing unit and an apparatus comprising at least one such bearing device

Patent metadata

Field	Value
Publication number	US-9494196-B2
Application number	US-201214411505-A
Country	US
Kind code	B2
Filing date	Jul 5, 2012
Priority date	Jul 5, 2012
Publication date	Nov 15, 2016
Grant date	Nov 15, 2016

Abstract

A bearing device, comprising a bearing including an inner ring and an outer ring centered on a central axis, an impulse ring including a target holder which is fixed to the inner ring and extends beyond the outer ring radially to the central axis, and a target which is fixed to the target holder beyond the outer ring and is adapted to cooperate with detection means for tracking the rotation of the impulse ring around the central axis, and shifting means for axially shifting the impulse ring relative to the outer ring; the shifting means are distinct from the target holder. A sensor-bearing unit and an apparatus comprising at least one such bearing device are also disclosed and claimed.

First claim

The invention claimed is:

1. A bearing device, comprising:
a bearing including an inner ring and an outer ring centered on a central axis;
an impulse ring including:
a target holder which is fixed to the inner ring and extends beyond the outer ring radially to the central axis, and
a target which is fixed to the target holder beyond the outer ring and is adapted to cooperate with detection means for tracking the rotation of the impulse ring around the central axis; and

shifting means, distinct from the target holder, for axially shifting the impulse ring relative to the outer ring, the shifting means being located on or against the inner ring and extending axially beyond the outer ring opposite the bearing, along the central axis.

2. The bearing device according to claim 1 , wherein the shifting means bear against the target holder near an inner portion of the target holder.

3. The bearing device according to claim 1 , wherein the shifting means comprise a side portion of the inner ring.

4. The bearing device according to claim 1 , wherein an intermediate portion of the target holder comprises rigidifying parts.

5. A bearing device, comprising:
a bearing including an inner ring and an outer ring centered on a central axis;
an impulse ring including:
a target holder which is fixed to the inner ring and extends beyond the outer ring radially to the central axis, and
a target which is fixed to the target holder beyond the outer ring and is adapted to cooperate with detection means for tracking the rotation of the impulse ring around the central axis; and

shifting means, distinct from the target holder, for axially shifting the impulse ring relative to the outer ring, the shifting means defining an axial gap between the outer ring and an intermediate portion of the target holder along the central axis.

6. The bearing device according to claim 5 , wherein the axial gap is initially comprised between 2% and 4% of maximum outer diameter of the outer ring.

7. The bearing device according to claim 5 , wherein the shifting means bear against the target holder near an inner portion of the target holder.

8. The bearing device according to claim 5 , wherein the shifting means comprise a side portion of the inner ring.

9. A bearing device, comprising:
a bearing including an inner ring and an outer ring centered on a central axis;
an impulse ring including:
a target holder which is fixed to the inner ring and extends beyond the outer ring radially to the central axis, and
a target which is fixed to the target holder beyond the outer ring and is adapted to cooperate with detection means for tracking the rotation of the impulse ring around the central axis; and

shifting means, distinct from the target holder, for axially shifting the impulse ring relative to the outer ring, the shifting means comprising a washer located between the target holder and the inner ring.

10. The bearing device according to claim 9 , wherein the shifting means bear against the target holder near an inner portion of the target holder.

11. The bearing device according to claim 9 , wherein the shifting means comprise a side portion of the inner ring.

12. The bearing device according to claim 9 , wherein an intermediate portion of the target holder comprises rigidifying parts.

13. The bearing device according to claim 9 , wherein the bearing is a rolling bearing including rolling elements located between the inner ring and the outer ring.

14. The bearing device according to claim 9 , wherein at least one axial side of the bearing comprises seals located between the inner ring and the outer ring.

15. The bearing device according to claim 9 , wherein the target holder has an outer portion supporting the target and extending opposite the bearing.

16. The bearing device according to claim 9 , wherein the impulse ring is a magnetic impulse ring, with a magnetic target including magnetic poles.

17. The bearing device according to claim 9 , wherein the target of the impulse ring is a radial target.

18. The bearing device according to claim 9 , wherein the target of the impulse ring is an axial target.

19. A sensor-bearing unit, comprising the detection means and the bearing device according to claim 9 .

20. An apparatus, comprising a rotating shaft, the detection means and at least one bearing device according to claim 9 , wherein the inner ring of the bearing is fixed on the rotating shaft and the detection means are associated with the impulse ring for tracking the rotation of the rotating shaft.

Assignees

• Sausset Vincent
• Chaussat Sylvain
• Skf Ab

Inventors

• Sausset Vincent
• Chaussat Sylvain

Classifications

• G01P3/443

  mounted in bearings (bearings F16C) · CPC title

• F16C19/06

  with a single row or balls · CPC title

• F16C41/007 Primary

  Encoders, e.g. parts with a plurality of alternating magnetic poles · CPC title