| CPC F16C 41/007 (2013.01) [F16C 2326/02 (2013.01); G01D 2205/26 (2021.05)] | 2 Claims |
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1. A magnetic encoder for use in a wheel support bearing device of an automobile, the magnetic encoder comprising:
an annular support member made of metal; and
an annular magnet member made of a plastic magnet,
the annular support member includes:
a cylindrical portion that fits on an exterior of an inner ring of a bearing of the wheel support bearing device; and
an outward flange portion extending radially outward from an end portion of the cylindrical portion in an inboard side,
the cylindrical portion has a small-diameter portion press-fitted to the inner ring of the bearing, and a large-diameter portion formed by enlarging a part of the cylindrical portion, the part being closer to the inboard side than the small-diameter portion,
the annular magnet member is attached to a surface of the outward flange portion in the inboard side,
the annular magnet member has an inner-diameter side recessed portion formed by depressing, toward an outboard side, a radially inner part in a surface, in the inboard side, of the annular magnet member, and a wraparound portion that wraps around the annular support member toward the outboard side to a stepped portion between the small-diameter portion and the large-diameter portion of the cylindrical portion,
an inner peripheral surface of the wraparound portion protrudes more radially inward than the inner peripheral surface of the small-diameter portion, the inner peripheral surface of the wraparound portion being press-fitted to the inner ring,
the inner peripheral surface of the inner-diameter side recessed portion has a gate mark of an inner diameter disk gate, and
a portion of the inner peripheral surface of the inner-diameter side recessed portion lies between the wraparound portion of the annular magnet member and the gate mark.
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