| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a camshaft structure, which allows suitable supply of lubricant while reducing leak of the lubricant. <P>SOLUTION: A camshaft 1 includes: journal portions 21a-21f, 31a-31f supported by a bearing unit 6, an annular groove portion 24a-24f, 34a-34f formed in each of the journal portions 21a-21f, 31a-31f; shaft oil passages 23, 33 provided within a shaft body; and oil holes 25a-25f, 35a-35f connecting the shaft oil passages 23, 33 to the groove portions 24a-24f, 34a-34f respectively. Multiple groove portions 24a-24f, 34a-34f include a first groove portion A having a supply destination of lubricant on the downstream side of the groove portions 24a-24d, 34b, 34f, and a second groove portion B for using lubricant only for lubrication of the journal portions 21e, 21f, 31a, 31c, 31d, 34e. The first groove portion A is larger in cross sectional area S1 than the second groove portion B. <P>COPYRIGHT: (C)2013,JPO&INPIT |
