A Sensor Holder And A Wheel Bearing Apparatus Incorporated With A Wheel Speed Detecting Apparatus
First Claim
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1. A sensor holder comprising:
- an encoder and a wheel speed sensor arranged opposite to the encoder via a predetermined air gap;
an annular fitting member formed by pressing an anti-corrosive steel plate;
a holding portion formed from injection moldable synthetic resin integrally formed with the annular fitting member, said wheel speed sensor is embedded in the holding portion; and
at least a surface of the annular fitting member contacting the holding portion is roughened by shot blasting to have a surface roughness Ra of 0.8 or more.
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Abstract
A sensor holder has an encoder and a wheel speed sensor arranged opposite to the encoder, via a predetermined air gap. An annular fitting member is formed by pressing an anti-corrosive steel plate. A holding portion is formed of injection moldable synthetic resin and is integrally formed with the annular fitting member. The wheel speed sensor is embedded in the holding portion. At least a surface of the annular fitting member contacting the holding portion is roughened by shot blasting to have a surface roughness Ra of 0.8 or more.
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Citations
9 Claims
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1. A sensor holder comprising:
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an encoder and a wheel speed sensor arranged opposite to the encoder via a predetermined air gap; an annular fitting member formed by pressing an anti-corrosive steel plate; a holding portion formed from injection moldable synthetic resin integrally formed with the annular fitting member, said wheel speed sensor is embedded in the holding portion; and at least a surface of the annular fitting member contacting the holding portion is roughened by shot blasting to have a surface roughness Ra of 0.8 or more. - View Dependent Claims (2, 3, 4)
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5. A wheel bearing apparatus incorporated with a wheel speed detecting apparatus comprising:
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an outer member integrally formed on its outer circumference, with a body mounting flange, said body mounting flange to be mounted on a suspension apparatus of a vehicle, said outer member inner circumference including double row outer raceway surfaces; an inner member includes a wheel hub and at least one inner ring, said wheel hub integrally formed at one end with a wheel mounting flange, a cylindrical portion axially extends from the wheel mounting flange, the inner ring is press fit onto the cylindrical portion of the wheel hub, the wheel hub and the inner ring are formed, on their outer circumferences, with double row inner raceway surfaces opposite to the double row outer raceway surfaces; double row rolling elements are contained between the inner and outer raceway surfaces of the inner and outer members; and a wheel speed detecting apparatus for detecting a wheel rotation speed of a vehicle including an encoder fit onto the outer circumference of the inner ring, an annular fitting member of a sensor holder is press fit onto the end of the outer member, and that a seal is arranged at the inner side of the encoder, via a holding portion, of the sensor holder; and at least a surface of the annular fitting member contacting the holding portion is roughened by shot blasting to have a surface roughness Ra of 0.8 or more. - View Dependent Claims (6, 7, 8, 9)
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Specification