Koyo Seiko Company, Ltd.

Takahiro Umekawa

Teruyuki Wakisaka

Shinichirou Kashiwagi

Nobuyuki Seo

Hiromi Kawanishi

Kazutaka Kamura

A rolling bearing device comprising an outer ring member, an inner ring member concentric with the outer ring member in the diameter direction, a plurality of rolling elements disposed so as to freely roll between the outer ring member and the inner ring member, and an axial member which is inserted into the center hole of the inner ring member and which has a flange outward in the diameter direction on the outer peripheral surface thereof, wherein the inner ring member has a curved chamfer on its end surface on the inner peripheral surface side thereof, the axial member is caulked to the end surface of the inner ring member, the amount of decentering between the center of the inner ring members in the diameter direction and the center of the chamfer in the diameter direction is set to the range of over 0 &mgr;m and not more than 200 &mgr;m.

Vehicle-use rolling bearing device

A rolling bearing mounting structure for mounting a rolling bearing to an insertion bore has an anti-slip piece arranged on an axial end of the insertion bore, and preventing the rolling bearing from slipping out of the insertion bore toward one side of the insertion bore in a direction of the axial center; a first concave section halfway along the insertion bore in the aforementioned direction, in a circumferential direction; a second concave section opposed to the first concave section in a diameter direction on an outer peripheral surface of the outer ring member of the rolling bearing, in the circumferential direction; and an anti-slip member engaged with engagement surfaces on the first and second concave sections, respectively, and preventing the rolling bearing from slipping out of the insertion bore toward the other side of the support member in the direction of the axial center.

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Kashiwara, Japan

Takahiro Umekawa