| 摘要 |
PURPOSE:To continually supply fresh lubricating oil to a thrust bearing part in a journal part, by providing spiral feed oil paths, twisted in a reverse direction to each other, between an end part in the side of a driven gear and an end part in the side of the thrust bearing part in an external surface or the like of the journal part. CONSTITUTION:If a driving gear 29 and a driven gear 30 rotate as a crankshaft 22 rotates when an engine is in operation, the engine inducts lubricating oil contained in a space 31 into one feed oil path 43 to be transferred to the side of a washer 36, lubricating the washer 36 and a collar 37. Next the engine inducts the lubricating oil into the other feed oil path 44 to be returned to a side of the space 31. that is, the both feed oil paths 43, 44, forming in both sides of a journal part 32 a circulative circuit enabling the lubricating oil to be circulated, prevent the generation of a back pressure rise in a side of the washer 36 in the journal part 32. Accordingly, the engine enables the fresh lubricating oil to be continually supplied to the washer 36 and the collar 37 with no generation of a fault due to the back pressure rise. |
