Automatic sensor positioner
First Claim
1. A wheel speed sensor assembly for utilization with a vehicle wheel rotatably mounted on an axle, comprising a rotor operatively connected to said wheel for rotation therewith, a magnetic sensing assembly including a housing, a sensor unit operatively positioned in said housing and having magnetic poles exposed at the forward end of the sensor unit facing the rotor, means on the sensor unit adapted to provide a predetermined spacing between the rotor and sensor unit, said housing and sensor unit having frictionally engageable surfaces, a generally U-shaped spring having one arm engaging the housing and the other arm engaging the sensor unit to bias the friction surfaces together, the top surface of the sensor unit is cut away to provide a shoulder adjacent the forward end of the sensor unit, said cutaway portion providing space for said spring, and mounting means operatively securing the magnetic sensing assembly on said axle.
2 Assignments
0 Petitions
Accused Products
Abstract
An automatic speed sensor positioner for use on a wheel of an automotive vehicle where a speed sensor device is located in the brake drum of each wheel of an automotive vehicle and cooperates with a slotted rotor rotating with the wheel to sense the speed thereof. This device includes a housing mounted in the brake drum and a magnetic sensor positioned in the housing; the housing and sensor having complementary tapered surfaces which are urged together by a spring, so that the sensor will move into proper position determined by an ablative plate on the sensor when it is engaged by the rotor as the wheel is assembled on the axle.
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Citations
11 Claims
- 1. A wheel speed sensor assembly for utilization with a vehicle wheel rotatably mounted on an axle, comprising a rotor operatively connected to said wheel for rotation therewith, a magnetic sensing assembly including a housing, a sensor unit operatively positioned in said housing and having magnetic poles exposed at the forward end of the sensor unit facing the rotor, means on the sensor unit adapted to provide a predetermined spacing between the rotor and sensor unit, said housing and sensor unit having frictionally engageable surfaces, a generally U-shaped spring having one arm engaging the housing and the other arm engaging the sensor unit to bias the friction surfaces together, the top surface of the sensor unit is cut away to provide a shoulder adjacent the forward end of the sensor unit, said cutaway portion providing space for said spring, and mounting means operatively securing the magnetic sensing assembly on said axle.
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8. A wheel speed sensor assembly for utilization with a vehicle wheel rotatably mounted on an axle, comprising a rotor operatively connected to said wheel for rotation therewith, a magnetic sensing assembly including a housing, a sensor unit operatively positioned in said housing and having magnetic poles exposed at the forward end of the sensor unit facing the rotor, means on the sensor unit adapted to provide a predetermined spacing between the rotor and sensor unit, said housing having parallel interior side walls terminating adjacent their lower edges in inwardly inclined surfaces, said sensor unit having parallel side walls terminating in inwardly tapering surfaces, a generally U-shaped spring having one arm engaging the housing and the other arm engaging the sensor unit to bias the sensor unit downwardly and cause frictional engagement of said inclined and tapered surfaces to retain the sensor unit in adjusted position in the housing, and mounting operatively securing the magnetic sensing assembly on said axle.
- 10. A wheel speed sensor assembly for utilization with a vehicle wheel rotatably mounted on an axle, comprising a rotor ring operatively connected to the wheel for rotation therewith, a magnetic sensing assembly, and mounting means operatively securing the magnetic sensing assembly on said axle, said magnetic sensing assembly including a housing open at both ends and having a passage extending therethrough, said housing comprising a top wall having a pair of spaced openings therein, a pair of side walls with parallel interior surfaces terminating adjacent their lower edges in a pair of inwardly inclined surfaces, and a bottom wall, a sensor unit operatively positioned in said housing and having magnetic poles exposed at the forward end thereof facing said rotor ring, said sensor unit having a top surface which is cut away to define a shoulder adjacent the forward end and parallel side walls terminating adjacent their lower edges in inwardly tapering surfaces, a generally U-shaped spring positioned in the housing in the space defined by the cut-away top surface of the sensor unit and having a first arm engaging the top housing wall and terminating in a pair of upturned ears received in said spaced openings and a second arm engaging the upper surface of the sensor unit, said second arm terminating in an upturned lip, said spring urging the sensor unit downward in the housing to cause engagement of said tapered and inclined surfaces in a wedging action, an ablative plate abutting the forward end of the sensor unit and having a peripheral flange frictionally engaging the sensor unit to provide a predetermined spacing between the rotor ring and sensor unit, said ablative plate having a central opening exposing the magnetic poles, said rotor ring having a plurality of circumferentially equally spaced openings adapted to be aligned with said opening in the ablative plate.
Specification