| 摘要 |
PURPOSE:To remedy a defect in lubricating oil supply in the case of using it for external lubrication and to eliminate stagnation of dust so as to improve a lubricating action and the life of a bearing. CONSTITUTION:Projecting bars 4, 5 for preventing a roller from falling out are arranged on the opposed side faces of respective pockets 3 in a cage 1, and notches 6, 8 are arranged in the intermediate part, and both ends of the side faces. A circumferential groove 10 is arranged on the outside diameter face of the cage 1. The circular groove 10 is positioned to be matched with the notch 6 in the intermediate part. The cage 1, which is made of a resin and is formed into a cylinder, stores a needle roller 2 in each of the pockets 3 arranged in plural positions in the circumferential direction. Respective projecting bars 4, 5 are arranged on the cage inside diameter sides on the opposed side faces of the pockets 3 and opening edges on the outside diameter sides, and are positioned between the central notches 6 and the both end notches 8. The outside diameter side projecting bar 5, in which the axial direction width is narrower and the projection height is lower in comparison with the inside diameter side projecting bar 4, may be applicable. The central notch 6 in each of the pockets 3 may be formed into deeper one than the end part notch 8. |
