| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing with a sensor capable of matching an origin position with a direct view of an origin position, reducing errors in origin position matching, and accurately acquiring the origin position. SOLUTION: The bearing comprises a bearing part 1 and a rotation sensor 2. The rotation sensor 2 is constituted of a ring-like encoder 8 and a sensor unit 9. The encoder 8 has a part 10 of which the rotation is to be detected and a part 11 of which the origin position is to be detected and is mounted to an inner ring 2, a rotation-side bearing ring. The sensor unit 9 has a sensor housing 15 mounted to an outer ring 4, a fixed-side bearing ring, and a plurality of sensor elements 16-18 mounted to the sensor housing 15 for detecting the parts to be detected 10 and 11 of the encoder 8. An observation window 19 with a view of the part 11 of which the origin position is to be detected is provided for a location in the direction of circumference to which the sensor element 18 for origin position detection is mounted in the sensor housing 15. COPYRIGHT: (C)2005,JPO&NCIPI
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