| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a structure that eliminates influences of thermal expansion and thermal contraction of a holder 21 made of synthetic resin when the structure has a pair of sensors 6a, 6b embedded in and supported by the holder 21 while shifting not only in an axial direction, but also in a circumferential direction in order to measure physical quantity of a rolling bearing unit. <P>SOLUTION: A position of a fixed ring 13a, fixed to an inner peripheral surface of a cylinder portion 24 of a cover 5b, in an axial direction of an anchor plate portion 23 is aligned with a position in an axial direction of a detection portion of one sensor 6b. The direction in which a detection portion of the other sensor 6a peripherally shifts from the detection portion of the one sensor 6b is suitably restricted with relationship to the direction of a border between an S pole and an N pole present at a part of an outer peripheral surface of an encoder 4b that the detection portion of the other sensor 6a faces. Then a direction of movement of the detection portion of the other sensor 6a based upon the thermal expansion and thermal contraction of the holder 21 is aligned with the direction of the border. <P>COPYRIGHT: (C)2012,JPO&INPIT |
