Railway axle bearing and sealing assembly with integrated rotational speed detector
US5289120A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 1992 |
| Grant date | Feb 22, 1994 |
| Priority date | — |
| Expiry date | May 28, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2361/31
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A railway axle is described of the type in which a rolling element bearing is mounted within a seat defined between two members, a first of which rotates with respect to the second, and is provided, externally of the seat, with a sealing assembly adapted to protect respective rolling bodies of the bearing; an annular element of the sealing assembly is fixed for rotation with the rotating member of the axle and is provided with a plurality of permanently magnetized zones having substantially the same width circumferentially spaced from one another with substantially constant pitch; within the seat and close to the said annular element of the sealing assembly there is further provided a sensor carried by the fixed member of the axle and adapted to be activated by the transit past it of the said magnetized zones to generate a periodic signal having a frequency proportional to the number of these which transit past the sensor in unit time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.