| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rotation detection device capable of correctly detecting rotation of a rotation member while preventing interference of a magnetic sensor during assembling, and a wheel bearing device provided with the rotation detection device. <P>SOLUTION: A rotation detection device 1 includes a magnetic encoder 2 which is attached to an inner ring 11 and includes a plurality of magnetic poles arranged along the circumferential direction of the inner ring 11; a magnetic sensor 3 which is attached to a knuckle 9 rotatably supporting the inner ring 11 and includes Hall ICs 30a and 30b for detecting the magnetic field of the magnetic encoder 2; and a cover member 4 which is un-rotatably provided to the knuckle 9 and at least a part of which is interposed between the magnetic encoder 2 and the magnetic sensor 3. The magnetic sensor 3 includes a body part 31 holding the Hall ICs 30a and 30b, and an elastic part 32 for pressing the body part 31 against the cover member 4. <P>COPYRIGHT: (C)2013,JPO&INPIT |
