Rolling element bearing unit with sensor and hub unit with sensor
First Claim
1. A sensor-equipped antifriction bearing unit comprising an antifriction bearing having a fixed-side raceway member, a rotation-side raceway member and rolling bodies, and a sensor device provided on the bearing,wherein the rotation-side raceway member is made of a magnetic material and the sensor device has a magnetostrictive sensor for detecting directly a reverse magnetostrictive effect of the rotation-side raceway member itself produced by a force exerted thereon by the rolling bodies.
2 Assignments
0 Petitions
Accused Products
Abstract
A sensor-equipped hub unit comprises a hub unit 1 having a wheel-side raceway member 4, a body-side raceway member 5, and two rows of rolling bodies 6, and a sensor device 2 provided on the hub unit 1. The sensor device 2 has a magnetostrictive sensor 31 for detecting a reverse magnetostrictive effect of the raceway member 4 produced by a force exerted thereon by the rolling bodies 6. The sensor device 2 detects rotation from the number of repetitions of a variation in strain and also detects the force acting on the wheel-side raceway member 4 from the amplitude of strain.
12 Citations
20 Claims
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1. A sensor-equipped antifriction bearing unit comprising an antifriction bearing having a fixed-side raceway member, a rotation-side raceway member and rolling bodies, and a sensor device provided on the bearing,
wherein the rotation-side raceway member is made of a magnetic material and the sensor device has a magnetostrictive sensor for detecting directly a reverse magnetostrictive effect of the rotation-side raceway member itself produced by a force exerted thereon by the rolling bodies.
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8. A sensor-equipped antifriction bearing unit comprising an antifriction bearing having a fixed-side raceway member, a rotation-side raceway member and rolling bodies, and a sensor device provided on the bearing,
wherein the sensor device has a magnetostrictive sensor for detecting a reverse magnetostrictive effect of the rotation-side raceway member produced by a force exerted thereon by the rolling bodies, wherein the magnetostrictive sensor has a detecting face in an axial direction and a detecting face in a radial direction, is attached to a fixed-side member and detects all of the axial displacement of the rotation-side raceway member, the radial displacement of the rotation-side raceway member, the force acting on the rotation-side raceway member and rotation data thereof.
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11. A sensor-equipped hub unit comprising a hub unit having a wheel-side raceway member to be attached to a wheel, a body-side raceway member to be fixed to a vehicle body, and two rows of rolling bodies arranged between the two raceway members, and a sensor device provided on the hub unit,
wherein wheel-side raceway member is made of a magnetic material and the sensor device has a magnetostrictive sensor for detecting directly a reverse magnetostrictive effect of the wheel-side raceway member itself produced by a force exerted thereon by the rolling bodies.
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18. A sensor-equipped hub unit having a wheel-side raceway member to be attached to a wheel, a body-side raceway member to be fixed to a vehicle body, and two rows of rolling bodies arranged between the two raceway members, and a sensor device provided on the hub unit, wherein the sensor device has a magnetostrictive sensor for detecting a reverse magnetostrictive effect of the wheel-side raceway member produced by a force exerted thereon by the rolling bodies,
wherein the magnetostrictive sensor has a detecting face in an axial direction and a detecting face in a radial direction, is attached to a body-side member and detects all of the axial displacement of the wheel-side raceway member, the radial displacement of the wheel-side raceway member, the force acting on the wheel-side raceway member and rotation data thereof.
Specification