| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent seizure at a slide contact portion between a large-diameter side flange surface of an inner race and a tapered roller bearing. <P>SOLUTION: In the tapered roller bearing, raceways 12 and 22 are formed at an outer race 11 and an inner race 20. In the inner race 20, a small-diameter side flange part 23 is formed on one of both axial sides of the raceway 22, and a large-diameter side flange part 24 is formed on the other. The space formed between the outer race 11 and the inner race 20 serves as an oil flow path in which a lubricant flows from the small-diameter side flange part 23 of the inner race 20 to the large-diameter side flange part 24. A holder 30 located on the small-diameter side flange part 23 side of the inner race 20 is located apart from the outer race 11 toward an inner diameter side, to form an oil introducing space 38 between the outer race 11 and the holder 30. An axial middle portion of the holder 30 is swollen to an outer diameter side, to form a swollen part 60. A constriction 39 for constricting the oil flow path is formed between the raceway 12 of the outer race 11 and the swollen part 60. An oil introducing passage 32 which introduces a lubricant in the oil introducing space 38 to an oil flow path between the holder 30 and the inner race 20, is formed in the holder 30 positioned before the constriction 39. <P>COPYRIGHT: (C)2013,JPO&INPIT |
