| 摘要 |
PURPOSE:To enable application of pre-load without any deformation of a bearing by making a ring-like cage to encircle a bearing outer race and providing an engagement gap between the cage and a base. CONSTITUTION:A bearing 3b is forced into or bonded inside a ring-like cage 11 for settlement. The bearing is so designed that there is a fine gap between the cage 11 and a base 4 and an axial pre-load is applied to the cage 11, namely, the bearing outer race by a spring 7. The fine gap between the cage 11 and the base 4 is needed for application of the pre-load, however, it is not desirable that the gap is left after assembly from the view point of improvement of revolution accuracy. To dissipate the gap, a spring 8 axially pushes one point on the external periphery of the cage 11 via a metal fitting 15. The cage 11, at this time, may be formed in a shape to be held at three points 12-14. |
