| 摘要 |
A rolling bearing cage capable of preventing progression of problems in contact portions between rolling elements and the cage even during high-speed rotation, and a rolling bearing are provided. Each pocket 9 of a crown type cage 11 have a cylindrical surface 9a formed by a cylindrical shape having a center line G extending in a radial direction, and a tapered surface 9b contiguous with the cylindrical surface 9a on a radially inner side or a radially outer side of the cylindrical surface 9a and extending away from the cylindrical surface 9a in the radial direction and toward the center line G. A radial displacement of the crown type cage 11 is regulated by a contact of the ball 7 with the tapered surface 9b. In a state in which the ball 7 is in contact with the tapered surface 9b, an angle ± formed by an imaginary line A extending through a contact point P between the ball 7 and the tapered surface 9b and the center O of the ball 7, and an imaginary perpendicular plane B extending through the center of the ball 7 and perpendicular to the radial direction, is set to be larger than a friction angle » defined by a friction coefficient µ at the contact point P between the ball 7 and the tapered surface 9b. |
