| 主权项 |
1. A roller bearing comprising:
an inner ring; an outer ring; a plurality of rollers provided between the inner ring and the outer ring; and a cage made of resin and holding the rollers at intervals along a circumferential direction of the cage, wherein the cage includes a pair of annular rings and a plurality of cage bars that are disposed such that a longitudinal direction of each cage bar is parallel to a center line of the cage and that couples the annular rings together, and an area enclosed by the pair of annular rings and circumferentially adjacent cage bars serves as a pocket configured to hold each roller, each respective cage bar defining a radially outward surface, and configured with a pair of tabs provided so as to protrude radially outward from the radially outward surface of each respective cage bar, the pair of tabs configured to prevent the roller in the pocket from slipping out through the pocket toward a radially outer side, a surface of a bottom portion of each tab is discontinuous with surfaces of the cage bar, which are located on both sides of the tab in the longitudinal direction, in the radially outward surface of each respective cage bar, the pair of tabs are provided on both sides of each respective cage bar in the circumferential direction of the cage, each cage bar configured with a groove formed between two the tabs such that a bottom surface of the groove is radially inward from the radially outward surface of each respective cage bar the groove extending in the longitudinal direction and being formed in a center of the cage bar such that a length of the groove in the longitudinal direction is halved at the center line. |
