| 摘要 |
PROBLEM TO BE SOLVED: To uniformly and surely supply a lubricant to a rolling bearing train by connecting a ring passage to a groove extending from the bearing to the outside, connecting it to a rolling passage by a passage, differing the number of grooves from the number of passages, and also mutually synchronizing them. SOLUTION: Two rolling passages 7, 7a for ball trains 8, 8a are arranged with in a bearing outer ring 6. The inner ring 9 of an inclined ball bearing is extended to the lower part of a four-point ball bearing in the axial direction to support inner rings 10, 11. In order to uniformly supply a lubricant to the rolling passages 7, 7a and the balls 8, 8a, a groove 14 is installed to the circumferential diameter of the inner ring 9, and connected to ring-like space 13 and a ring passage 12 arranged on the inner ring 11. The number and distribution of the grooves 14, and the distribution of the grooves 14 and passages 15, 15a are mutually differed, and they are also mutually synchronized. Thus, a bearing desirable in cost which is compact and easily and surely treatable can be attained, and the lubricant can be surely supplied. |
