| 摘要 |
PROBLEM TO BE SOLVED: To provide a lubricating structure of a crankshaft, capable of stably supplying lubricant from a journal bearing part to a connecting rod bearing part without causing variation in the quantity of the lubricant depending on the rotating position of the crankshaft. SOLUTION: An oil passage 6 within the crankshaft 3 for supplying the lubricant supplied to the journal bearing part 4 to the connecting rod bearing part 5 is formed so that a supply port 62b of a second oil passage 62 opened toward the connecting rod bearing part 5 is located in a position closer to connecting parts 51b and 52b of both halved bearings 51 and 52 when a suction port 61a of a first oil passage 61 opened toward the journal bearing part 4 is located in a portion closer to connecting parts 41b and 42b of both halved bearings 41 and 42, and a supply port 62b of the second oil passage 62 is located in a portion closer to the center of both the halved bearings 51 and 52 when the suction port 61a of the first oil passage 61 is located in a portion closer to the center of the upper halved bearing 41 of an oil groove 41d. COPYRIGHT: (C)2008,JPO&INPIT
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