Rotational speed sensor

Claim 2

A skid control system for a vehicle having a prop shaft for driving a pair of wheels of the vehicle and a differential including a spindle and a differential bearing mounting said spindle for rotation with said prop shaft comprising a differential housing means having an axially extending locating surface accurately located relative to the differential axis, a sensor for sensing the average rotational speed of said driven pair of five wheels comprising; rotor means having a plurality of circumferentially disposed first teeth, stator means having a plurality of circumferentially disposed second teeth in confrontation with said first teeth and including coil means for providing an electrical output signal for said skid control system representative of the average rotational speed of the driven wheels in response to relative rotation between said rotor means and said stator means, and first support means supporting said rotor means for rotation with the spindle proximate said differential bearing and second support means supporting said stator means to the differential proximate said differential bearing, said second support means including a mating surface engageable with the locating surface for accurately locating the axis of said stator means relative to the differential axis, whereby a high degree of dimensional accuracy is provided at said confronting first and second teeth so that a minimum gap between said first and second teeth may be maintained.

Claim 3

The apparatus of claim 1 wherein the differential housing means locating surface is accurately located relative to the differential axis and wherein said stator support means mating surface is a flange engageable with the locating surface for accurately locating the axis of sAid stator means relative to the differential axis.

Claim 4

The apparatus of claim 1 with the locating surface being a bore surface and with said stator means including an outer, generally annular housing member having a flange with an annular surface defining said mating surface.

Claim 5

The apparatus of claim 3 with said stator means including an electrical connector connected to said coil means by a flexible conductor, said housing member comprising a radially extending support portion connected to and supporting said connector.

Claim 6

A skid control system for a vehicle having a prop shaft for driving a pair of wheels of the vehicle and a differential, a spindle and a differential bearing mounting said spindle for rotation with said prop shaft comprising a differential housing means having an axially extending locating surface accurately located relative to the differential axis, a sensor for sensing the average rotational speed of said driven pair of wheels; rotor means having a plurality of circumferentially disposed first teeth, stator means having a plurality of circumferentially disposed second teeth in confrontation with said first teeth and including coil means for providing an electrical output signal for said skid control system representative of the average rotational speed of the driven wheels in response to relative rotation between said rotor means and said stator means, and first support means supporting said rotor means for rotation with the spindle proximate said differential bearing said second support means supporting said stator means to the differential proximate said differential bearing, said second support means including a mating surface engageable with the locating surface for accurately locating the axis of said stator means relative the differential axis whereby a high degree of dimensional accuracy is provided at said confronting first and second teeth so that a minimum gap between said first and second teeth so that a minimum gap between said first and second teeth may be maintained, said first support means comprising an outer annular surface portion on a yoke member which is adapted to be connected with the proper shaft and with said rotor means being a generally ring-shaped member.

Claim 7

A skid control system for a vehicle having a prop shaft for driving a pair of wheels of the vehicle and a differential, a spindle and a differential bearing mounting said spindle for rotation with said prop shaft comprising a differential housing means having an axially extending locating surface accurately located relative to the differential axis, a sensor for sensing the average rotational speed of said driven pair of wheels; rotor means having a plurality of circumferentially disposed first teeth, stator means having a plurality of circumferentially disposed second teeth in confrontation with said first teeth and including coil means for providing an electrical output signal for said skid control system representative of the average rotational speed of the driven wheels in response to relative rotation between said rotor means and said stator means, and first support means supporting said rotor means for rotation with the spindle proximate said differential bearing said second support means supporting said stator means to the differential proximate said differential bearing, said second support means including a mating surface engageable with the locating surface for accurately locating the axis of said stator means relative the differential axis whereby a high degree of dimensional accuracy is provided at said confronting first and second teeth so that a minimum gap between said first and second teeth so that a minimum gap between said first and second teeth may be maintained, said first support means comprising an outer annular surface portion on a yoke member which is adapted to be connected with the proper shaft and with said rotor means being a generally ring-shaped member.

Claim 8

The apparatus of claim 5 with the differential including a housing with said spindle supported in the housing by a bearing assembly and including a seal supported on the housing proximate the bearing assembly for providing a seal between the housing and the shaft, and with the yoke supported on the spindle.

Claim 9

The apparatus of claim 6 with the locating surface being a bore surface and with said stator means including an outer, generally annular housing member having a flange with an annular surface defining said mating surface.

Claim 10

The apparatus of claim 7 with said stator means including an electrical connector connected to said coil means by a flexible conductor, said housing member comprising a radially extending support portion connected to and supporting said connector.

Claim 11

The apparatus of claim 8 comprising a baffle supported on the yoke proximate to said rotor means and said stator means to protect said rotor means and said stator means.