Bearing rotary speed sensor with concentric multipole magnetic rings axially aligned with collector branches
US5309094A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1992 |
| Grant date | May 3, 1994 |
| Priority date | — |
| Expiry date | Jul 6, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2326/02
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A sensor device of speed of rotation of a rotating member mounted by way of a roller bearing on a non-rotating member, said device comprising a coder element (11) rigid with the rotating race (6) of the bearing and producing an alternating magnetic field and a sensor element (12) rigid with the non-rotating race (7) of the bearing and arranged facing the coder element with an air gap, the coder element (11) comprising two axially magnetized concentric multipole rings (14, 15), and the sensor element (12) comprising an induction coil (17) coaxial with the multipole rings cooperating with a magnetic flux concentrator (18) whose collector branches (20, 21) are oriented axially facing said multipole rings (14, 15) of the coder element. Application to motor vehicle wheel hubs equipped with an ABS system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.