| 摘要 |
A rolling bearing unit for supporting a wheel, comprising a stationary race which has a stationary peripheral surface formed with a stationary raceway, being not rotatable during use, and supported by a suspension, a rotatable race which has a rotatable peripheral surface formed with a rotatable raceway, being rotatable with the wheel fixed thereto, rolling elements which are rotatably provided between the stationary raceway and rotatable raceway, a vibration sensor which is supported by the stationary race, a sensor rotor swhich is upported by the rotatable race and has circumferential characteristics changing alternately and a rotation speed sensor which is supported by the stationary race and has a detection portion facing the sensor rotor.
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