| 摘要 |
PROBLEM TO BE SOLVED: To stably supply oil to the circumferential surface of a crank pin even when supply oil pressure is low, and to stably supply the oil to the circumferential surface of a crank journal even when a supply oil amount is small. SOLUTION: In a lubricating device, an oil nozzle hole 19 branched from the oil passage 16 of a bulk head 11 supplying the oil to the crank journal 15 to inject the oil to a side face of the crank arm 17 is provided, an annular oil collecting part 21 having an oil pocket 20 of which a bottom external circumferential circle is offset from an axial center is formed to the side face of the crank arm 17, and a passage 31 in a shaft communicating the oil pocket 20 with a circumferential surface of a crank pin 32 is provided, so that the oil is supplied to the crank journal 15, the oil is injected from the oil nozzle hole 19 to be collected in the oil pocket 20, and the oil is supplied to the circumferential surface of the crank pin 32 through the passage 31 in the shaft through a centrifugal force. COPYRIGHT: (C)2010,JPO&INPIT
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