Measurement arrangement for a mounted shaft

Patent metadata

Field	Value
Publication number	US-9267960-B2
Application number	US-67715108-A
Country	US
Kind code	B2
Filing date	Sep 3, 2008
Priority date	Sep 12, 2007
Publication date	Feb 23, 2016
Grant date	Feb 23, 2016

Abstract

A measurement arrangement for a shaft mounted in a bearing. The measurement arrangement has a magnetic coding and a receiver. The receiver detects a change of the magnetic field of the magnetic coding when the mounted shaft is subjected to mechanical stress. The measurement arrangement is used in conjunction with a shaft mounted in a rolling or sliding bearing. The magnetic coding is disposed at a front end of a bearing component. Also, a rolling bearing and a bearing ring and a seal are disclosed.

First claim

The invention claimed is:

1. A measurement arrangement for a shaft which is mounted in a bearing having a first surface with a raceway formed therein and an end side, which is perpendicular to the first surface, the measurement arrangement comprising:
a magnetic coding, the magnetic coding further arranged to exhibit a magnetic field that changes by a magnetostrictive effect in response to a mechanical load applied to the shaft;
a cover, which axially closes the bearing, having an outer surface facing away from the magnetic coding and an inner surface facing the magnetic coding; and,
a receiver extending along an entire radial length of the inner surface of the cover and continuously contacting the inner surface of the cover, the receiver being operative to detect a change in the magnetic field of the magnetic coding caused by the mechanical load applied to the shaft and the receiver sensing the change in the magnetic field that is produced by the magnetostrictive effect as a result of the mechanical load,
wherein the magnetic coding comprises at least one resonant circuit as a signal transmitter for the receiver, and the receiver detects a magnetic component of electromagnetic radiation emitted from the at least one resonant circuit; and,
wherein the magnetic coding and the resonant circuit are arranged on the end side of the bearing.

2. The measurement arrangement of claim 1 , wherein the bearing is a roller bearing and comprises an outer ring as a component, and the magnetic coding is arranged at an end surface of the outer ring.

3. The measurement arrangement of claim 2 , wherein the magnetic coding has a sequence of areas which are radially circumferential at the end surface and adjacent to each other, and two of the areas of the sequence of areas, which are adjacent to each other, have different magnetization.

4. The measurement arrangement of claim 2 , wherein the magnetic coding is imprinted in a body of a bearing ring of the roller bearing.

5. The measurement arrangement of claim 1 , wherein the bearing is a roller bearing and comprises an inner ring as a component, and the magnetic coding is arranged at an end surface of the inner ring.

6. The measurement arrangement of claim 1 , wherein the bearing has an outer ring and the cover is fixable by a groove to the outer ring of the bearing.

7. The measurement arrangement of claim 1 , wherein the magnetic coding is attached as an additional body to the end side of the bearing.

8. The measurement arrangement of claim 1 , wherein the receiver is a magnetic coil, which supplies the at least one resonant circuit with power in the form of inductive coupling.

9. The measurement arrangement of claim 1 , wherein the end side has an end surface and the magnetic coding is arranged directly on the end surface.

10. A roller bearing mountable on a shaft, the roller bearing comprising;
at least one bearing ring having a first surface with a raceway formed therein and an end side, which is perpendicular to the first surface; and
a magnetic coding, the magnetic coding arranged to exhibit a magnetic field that changes by a magnetostrictive effect in response to a mechanical load applied to the shaft, when the roller bearing is mounted on the shaft,
wherein the magnetic coding comprises at least one resonant circuit as a signal transmitter for a receiver, and the receiver detects a magnetic component of electromagnetic radiation emitted from the at least on resonant circuit; and,
wherein the magnetic coding and the resonant circuit are arranged on the end side of the at least one bearing ring.

11. The roller bearing of claim 10 , wherein the magnetic coding is a circumferential sequence of areas of the end side, and two of the areas of the sequence of areas, which are adjacent to each other, have different magnetizations.

12. The roller bearing of claim 10 , wherein the magnetic coding is imprinted in the end side of the at least one bearing ring.

13. The roller bearing of claim 10 , wherein the magnetic coding attached to the end side of the at least one bearing ring.

14. The measurement arrangement of claim 10 , wherein the end side has an end surface and the magnetic coding is arranged directly on the end surface.

15. A bearing ring for a roller bearing mounted on a shaft, the bearing ring comprising:
a body having a first surface with a raceway formed therein, an end surface, which is perpendicular to the first surface, and a magnetic coding provided directly and only on the end surface of the body of the bearing ring, the magnetic coding arranged to exhibit a magnetic field that changes by a magnetostrictive effect in response to a mechanical load applied to the shaft,
wherein the magnetic coding comprises at least one resonant circuit as a signal transmitter for a receiver, and the receiver detects a magnetic component of electromagnetic radiation emitted from the at least one resonant circuit; and,
wherein the magnetic coding and the resonant circuit is arranged on the end side of the bearing ring.

16. A seal for a roller bearing mountable on a shaft, the seal comprising:
a sealing disk having abuse a first flange extending axially from a first end of the base, a second flange extending axially, in a same direction as the first flange, from a second end of the base, and a sealing lip extending from the second flange;
and
a magnetic coding arranged on the seal, the magnetic coding arranged to exhibit a magnetic field that changes by a magnetostrictive effect in response to a mechanical load applied to the shaft.

Assignees

• Duppe Carsten
• Schaeffler Technologies Ag

Inventors

• Duppe Carsten

Classifications

• F16C41/007

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

• G01L5/0023

  by using magnetic sensors · CPC title

• F16C33/586

  outside the space between the races, e.g. end faces or bore of inner ring · CPC title

• F16C19/06

  with a single row or balls · CPC title

• G01P3/487

  delivered by rotating magnets · CPC title