| 摘要 |
A pressed cage for a ball bearing is particularly suited for use in severe lubrication conditions. The pressed cage arrangement reduces seizure, holds lubricant for long periods, and thus prolongs the life of the bearing. In the pressed cage arrangement, two annular holding plates include ball holders and flat portions that alternate at regular intervals. The holding plates have a first recess (that may be spherical or semi-elliptic) that has a radius of curvature larger than the ball's radius of curvature. A second, preferably spherical, recess, with a radius of curvature smaller than that of the ball, is formed in the first recess. The ball rotates, being supported only on the boundaries between the first and second recesses, thereby reducing seizure. Spaces formed in the second recess, and spaces between the front portion of the ball and the junction between the holding plates, function as lubricant sumps. |
