Wheel speed sensor
First Claim
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1. A rotation sensor assembly, comprising:
- a bearing including;
a first race having an outer edge,a second race,a plurality of ball bearings positioned between the first race and the second race,a carrier coupled to the second race and constructed of a material having a relatively high permeability, anda tone wheel coupled to the carrier, the tone wheel including a plurality of magnetic pole pairs distributed around a circumference of the tone wheel;
a spacer abutting the first race;
a sensor mounted to the spacer and positioned adjacent the tone wheel, wherein the sensor is configured to sense rotation of the tone wheel relative to the sensor by sensing the magnetic pole pairs during said rotation; and
a flinger press fit onto one of the first race and the second race, the flinger positioned between the tone wheel and the sensor and sealing the carrier and the tone wheel within the bearing,wherein the carrier is press fit onto the second race such that the tone wheel is at a fixed depth from an outer edge of the first race, the tone wheel having a relative flatness of 0.1 mm, and a distance between the sensor and the tone wheel is fixed at approximately 1.87 mm+/−
0.27 mm.
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Abstract
A speed sensor assembly includes a bearing having a first race, a second race, a plurality of ball bearings separating the first race from the second race, and a tone wheel coupled to the second race. The speed sensor assembly also includes a spacer abutting the first race and a sensor positioned adjacent the tone wheel.
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Citations
21 Claims
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1. A rotation sensor assembly, comprising:
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a bearing including; a first race having an outer edge, a second race, a plurality of ball bearings positioned between the first race and the second race, a carrier coupled to the second race and constructed of a material having a relatively high permeability, and a tone wheel coupled to the carrier, the tone wheel including a plurality of magnetic pole pairs distributed around a circumference of the tone wheel; a spacer abutting the first race; a sensor mounted to the spacer and positioned adjacent the tone wheel, wherein the sensor is configured to sense rotation of the tone wheel relative to the sensor by sensing the magnetic pole pairs during said rotation; and a flinger press fit onto one of the first race and the second race, the flinger positioned between the tone wheel and the sensor and sealing the carrier and the tone wheel within the bearing, wherein the carrier is press fit onto the second race such that the tone wheel is at a fixed depth from an outer edge of the first race, the tone wheel having a relative flatness of 0.1 mm, and a distance between the sensor and the tone wheel is fixed at approximately 1.87 mm+/−
0.27 mm. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A bearing assembly for use with a speed sensor assembly, comprising:
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a first race having an outer edge; a second race having an outer edge; a plurality of ball bearings positioned between the first race and the second race, the ball bearings positioned inwardly of the outer edges of the first race and the second race; and a tone wheel coupled to the second race, the tone wheel including a plurality of magnetic pole pairs distributed around a circumference of the tone wheel, wherein the entire tone wheel is positioned inwardly of the outer edge of the second race, such that a space is defined between the tone wheel and the outer edge of the second race, and wherein the tone wheel is positioned at a fixed depth from the outer edge of the first race, the tone wheel having a relative flatness of 0.1 mm, and a distance between the sensor and the tone wheel is fixed at approximately 1.87 mm+/−
0.27 mm. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A rotation sensor assembly, comprising:
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a bearing including; a first race having an outer edge, a second race, a plurality of ball bearings positioned between the first race and the second race, a carrier coupled to the second race and constructed of a material having a relatively high permeability, and a tone wheel coupled to the carrier, the tone wheel including a plurality of magnetic pole pairs distributed around a circumference of the tone wheel; a spacer abutting the first race; and a sensor mounted to the spacer and positioned adjacent the tone wheel, wherein the sensor is configured to sense rotation of the tone wheel relative to the sensor by sensing the magnetic pole pairs during said rotation, wherein the carrier is press fit onto the second race such that the tone wheel is at a fixed depth from an outer edge of the first race, the tone wheel having a relative flatness of 0.1 mm, and a distance between the sensor and the tone wheel is fixed at approximately 1.87 mm+/−
0.27 mm. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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Specification