| 摘要 |
PROBLEM TO BE SOLVED: To provide an oil-impregnated sintered bearing capable of maintaining a favorable lubricated state with a rotating shaft over a long period of time by preventing a leakage of lubricating oil outside the bearing and to extend the life expectancy of the bearing. SOLUTION: The oil-impregnated sintered bearing is constituted so that a bearing hole 33 into which the rotating shaft 40 is inserted is bored in a bearing main body 31 impregnated by the lubricated oil in the sintered porous metal, wherein a part of an inner peripheral surface 33a of the bearing hole 33 forms a shaft support part 33B for supporting the rotating shaft 40. Inside the bearing main body 31, a pore part 34 which is freed in both end faces 32 side of the bearing main body 31 is provided while extending along the shaft axis line of the bearing hole 33. The pore part 34 is located in the direction of the shaft support part 33B inside the bearing main body 31. COPYRIGHT: (C)2006,JPO&NCIPI
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