Rolling bearing unit with rotational speed sensor

Details Rolling bearing unit with rotational speed sensor Rolling bearing unit with rotational speed sensor

Filed on

1998-02-27

Date issued

2000-08-29

Examiner

Footland, Lenard A.

Patent Class

Bearings

SubClass

Rotary bearing

SubSubClass

Antifriction bearing

Other Related Categories

F16C 1908

Type

Patent

Status

active

Patent number

061097934

Description

ABSTRACT:
A rolling bearing unit with a rotating speed sensor includes a stationary double row outer ring having a mount hole in an axially intermediate portion thereof, a rotatable inner ring assembly having a first inner ring having a first inner ring raceway and a second inner ring having a second inner ring raceway, and a plurality of rolling members provided between the first and second inner ring raceways and the outer ring raceways to provide a ball set bore diameter, respectively. An encoder has a detected portion with characteristics which change alternately and with a uniform interval in a circumferential direction, and is fixed concentric, at a portion on the inner ring assembly, axially between the first and second inner ring raceways. The detected portion has an outer peripheral surface portion with a diameter up to the ball set bore diameter. A sensor is provided for producing an output signal, has a detecting portion, and is supported within the mount hole in a state in which the detecting portion is opposed to the outer peripheral surface portion of the detected portion of the encoder. As a result, the output signal of the sensor changes as the characteristics of the detected portion alternately change.

REFERENCES:
patent: 3719841 (1973-03-01), Ritsema
patent: 4778286 (1988-10-01), Kadokawa
patent: 5183341 (1993-02-01), Ouchi et al.
patent: 5214722 (1993-05-01), Faye et al.
patent: 5624192 (1997-04-01), Rigaux et al.
KOYO Engineering Journal, Mar. 1997, pp. 33-39, No. 151. Japan.

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