Device for measuring the relative revolving speed between the races of a rolling contact bearing
US6339964B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 17, 1998 |
| Grant date | Jan 22, 2002 |
| Priority date | — |
| Expiry date | Feb 17, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P3/487
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A rolling contact bearing is fitted at one end thereof with a sealing device and a device for measuring the relative revolving speed between the bearing races. The sealing device comprises a metal insert (10) of annular shape fast for rotation with the rotating bearing race (11). The speed measuring device comprises a multipolar ring (18) mounted to the metal insert (10) and provided with magnetized segments of alternate polarity in the circumferential direction. The multipolar ring (18) is a ring of plastoferrite co-molded to the metal insert (10). Formed on the insert (10) is formed a plurality of radial recesses (21) adapted to yield, in the co-molding operation, a corresponding plurality of radial protrusions (22) in the multipolar ring (18). The radial recesses and protrusions (21, 22) are mutually engaged so as to prevent relative rotation between the multipolar ring (18) and the metal insert (10), but allow relative radial displacement owing to thermal variations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.