Rolling bearing unit with rotating speed detector

Details Rolling bearing unit with rotating speed detector Rolling bearing unit with rotating speed detector

1997-11-19

1998-12-22

Footland, Lenard A.

Bearings

Rotary bearing

Antifriction bearing

F16C 1928

Patent

active

058510745

ABSTRACT:
A rolling bearing unit with rotating speed detector is mounted to a hub and has a sensor comprising an axially magnetized permanent magnet 38 having first and second end faces, a pole piece 37 to which the first end face is abutted, a back yoke 39 to which the second end face is abutted to be closer to the hub 1, a coil 32 having a smaller in diameter than the hub and provided around the back yoke 39, so that the density of the magnetic flux flowing through the back yoke 39 changes as the phase changes in the cutouts 45 and 44 in the pole piece 37 and the tone wheel 13a.

REFERENCES:
patent: 4986605 (1991-01-01), Descombes
patent: 5296805 (1994-03-01), Clark et al.

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