Electricity: measuring and testing – Electrical speed measuring – Including speed-related frequency generator
Patent
1993-01-25
1994-03-01
Strecker, Gerard R.
Electricity: measuring and testing
Electrical speed measuring
Including speed-related frequency generator
188181R, 310 68B, 310155, 3011081, G01P 3488, H02K 1100, B60B 2700
Patent
active
052911306
ABSTRACT:
A vehicle wheel speed sensor incorporated on an axle spindle hub and hub cap assembly of the type using permanent magnets to generate a magnetic field having a magnetic path conducted through a plurality of teeth on a flange extending from the hub cap into a plurality of teeth on a stator with relative motion therebetween upon rotation of the wheel where the frequency of the change in the magnetic reluctance varies at a frequency proportional to the wheel speed. The stator is mounted to the end of the axle spindle by a securing bolt so that the stator can be easily removed for service without disturbing the axle bearings. As a part of the stator assembly, a locating plate is provided which allows the operating gap between the teeth formed in the flange and the teeth formed in the stator to be easily established upon assembly of the hub cap to the wheel hub by allowing the rotor to contact the locating plate when the hub cap securing bolts have been loosened and the axle is supported. The flange pilots on the inner annular surface in the wheel hub thereby reducing the cost of assembly and improving overall functionality.
REFERENCES:
patent: 3473120 (1969-10-01), Ruof
patent: 3683219 (1972-08-01), Kruse
patent: 3887046 (1975-06-01), Bueler
patent: 3916234 (1975-10-01), Stigall et al.
patent: 3928780 (1975-12-01), Vannini et al.
patent: 3934685 (1976-01-01), Jovick
patent: 3944864 (1976-03-01), Jovick
patent: 3998298 (1976-12-01), Fleagle
patent: 5111098 (1992-05-01), Peck et al.
Eaton Corporation
Strecker Gerard R.
Uthoff L. H.
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