| 摘要 |
PURPOSE:To aim at stabilization for a lubricating function, by installing a groove in a sliding surface of a plain bearing and, when supporting a crankshaft end, opening a radial centrifugal hole bored toward two directions to a clearance between the plain bearing and a thrust bearing, and installing a dust escaping device there. CONSTITUTION:An oil groove 17 installed in a plain bearing 16 is interconnected to a space 14 and an oil reservoir. And, both centrifugal holes 7 and 18 are installed in a crankshaft 5. Foreign matter large in specific gravity mixed in oil is separated from the oil to the space 14 by dint of centrifugal force, and discharged to the outside of a bearing housing by way of the oil groove 17 of the plain bearing 16. Therefore, a dust escaping device is installable in a simple structure.
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