| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cage 7b without hardly causing deformation based on centrifugal force and vibration applied in response to operation, by improving torsional rigidity. <P>SOLUTION: This cage 7b is formed by wrapping and embedding a reinforcing ring 12a made of a metallic plate and making the whole in an annular ring shape, inside a main part 9 in injection molding. This reinforcing ring 12a is formed as a plate part 14 extending in the orthogonal direction to the axial direction in a central part in the radial direction. An inner diameter near part and an outer diameter near part are formed as an inner diameter side-outer diameter side both bending parts 15 and 16 bending to the one side surface side in the axial direction for arranging a pocket 8. The problem is solved by restraining torsional deformation by enhancing a section modulus of the reinforcing ring 12a by adopting this shape. <P>COPYRIGHT: (C)2009,JPO&INPIT |
