| 摘要 |
PROBLEM TO BE SOLVED: To provide a hub unit bearing capable of preventing fitting surface immersion by sufficiently securing the area of contact with a fitting surface between a slinger and an inner ring even if deformation occurs in which one end part of a fixed part in a direction in which its diameter increases when the slinger is fitted.SOLUTION: An inner ring shoulder part 14 of an inner ring constituent 42 of an inner ring 4 has a conical surface 14b having an inclination angle equal to the modification angle of a fixed part 10a due to fitting of the fixed part 10a of a slinger 10 or slightly larger than the modification angle, a vicinity region 10k in a bearing inward direction of an R stop part 10d on an inner diameter side of an R part 10c of an arc-shaped section provided at the joint of the fixed part 10a and a circular plate part 10b comes into contact with an entrance part of the inner ring shoulder part 14, and an inner side 10e located nearer to the bearing inner side than the vicinity region 10k is in contact with the conical surface 14b, and therefore, when the slinger 10 is fitted, even if deformation occurs in which one end part of the fixed part 10a surfaces, it is possible to prevent fitting surface immersion by sufficiently securing the area of contact with the fitting surface between the slinger 10 and the inner ring 4. |
