| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To overcome the problem such that a magnetized ring is inclined by pressing power in a pressing direction, a distance between a rotational frequency sensor becomes inaccurate and accuracy for detecting a rotational frequency of a rotational ring is degraded when the magnetic ring is pressed, a pulser ring is pressed into an outer circumference of the rotational ring and the magnetized ring is radially apart from a fitting part. <P>SOLUTION: A pressed part 31 is formed in a radially inner region of a core metal 25 of the pulser ring 24 and pressed by a press fit jig 30. Since a bending moment for acting on an annular fold 28 is reduced, the annular fold 28 is prevented from being inclined to a plane. When a protection cover 11 is mounted to a fitted part 12 of an outer ring 2 and a magnetic sensor 35 is mounted to the protection cover 11, a facing distance between a detecting element 36 and the magnetized ring 26 is accurately set, the magnetic sensor 35 accurately detects a magnetic field change of the magnetized ring 26 and the rotational frequency on a center axis of an inner ring 3 is accurately detected. <P>COPYRIGHT: (C)2004,JPO</p> |
