| 摘要 |
PROBLEM TO BE SOLVED: To provide an improved pulsar ring which ensures a wide detection area to improve the accuracy of rotation detection and sensitivity, while preventing air swelling of a rubber magnet caused by a heating adhesion treatment or the like. SOLUTION: The pulsar ring 10 comprises a planar circular rubber magnet 11 in which many S-poles and N-poles are magnetized circumferentially alternately, and a steel core 12 which supports the rubber magnet 11 so that it is integrally attached. The core 12 comprises a twofold cylinder section 12c folded by performing bending processing on a planar circular steel member, and a supporting end face section 11a comprising an inward flange 12b and an outward flange 12a which are connected to the anti-folded side both ends of the twofold cylinder section 12c. The twofold cylinder section 12c is a fit tube 12c which is integrally fitted to a rotation side 5 of a bearing. A wall section of the fit tube 12c is provided with a through hole H which passing through from inside to outside. The rubber magnet 11 is attached to the supporting end face section 11a so that it extends over the inward flange 12b and the outward flange 12a. COPYRIGHT: (C)2006,JPO&NCIPI
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