| 摘要 |
PROBLEM TO BE SOLVED: To provide a thrust roller bearing having improved durability by preventing the uneven wear of rollers. SOLUTION: The thrust roller bearing includes the plurality of rollers 11, and a cage 20. The cage 20 includes both annular portions 21, 22 on the inner and outer diameter sides, and a plurality of columnar portions 30. The columnar portions 30 each include a radially intermediate portion 31, both side portions 32, 33 on the radially inner and outer diameter sides, and both inclined connection portions 34, 35 on the inner and outer diameter sides. On the opposed faces of the radially intermediate portion 31 and both side portions 32, 33 on the inner and outer diameter sides opposed to each other across pockets 23, roller come-off preventing portions 36, 37, 38 are formed to prevent the come-off of the rollers 11 from the pockets 23. The roller come-off preventing portions 36, 37, 38 are set to contact rolling surfaces 12 of the rollers 11 during the rotation of the bearing. A relationship A>B is established, where A is an opposition space size between the roller come-off preventing portions 37 opposed to each other at the side portion 32 on the inner diameter side and B is an opposition space size between the roller come-off preventing portions 38 opposed to each other at the side portion 35 on the outer diameter side. COPYRIGHT: (C)2010,JPO&INPIT
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