| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rolling bearing device with a sensor, which is hard to be influenced by a noise magnetic field even if the noise magnetic field is generated inside, and can measure a rotation state of a rotary wheel with high accuracy. <P>SOLUTION: A deep groove bearing 10 is equipped with a sensor 20 for measuring a rotation state of an inner ring 1 which is a rotary wheel. The sensor 20 includes an encoder 22 which is an annular magnet attached to the inner ring 1 so as to integrally rotate with the inner ring 1, magnetic detection elements 24 attached to an outer ring 2 which is a fixed wheel so as to oppose to the encoder 22 while keeping a sensor gap, and magnetic shields 28 for cutting off a radial direction magnetic field which is a noise magnetic field of the magnetic field generated from the encoder 22 which is the annular magnet, from the magnetic detection element 24. The magnetic shields 28 are oppositely provided on both sides of the magnetic detection element 24 in circumferential direction at intervals. <P>COPYRIGHT: (C)2013,JPO&INPIT |
