| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a highly reliable connecting rod structure using a needle roller bearing having reduced cost and improved lubricating performance. <P>SOLUTION: A connection rod 41 consists of a large end portion 42 and a small end portion 43 having bearings 45, 46 in the cylindrical internals, and a connection bar 44 connecting the large end portion 42 to the small end portion 43. The needle roller bearing supporting the large end portion 42 and the small end portion 43 consists of an annular bearing ring having a raceway surface on the inner diameter face of an axial central portion and a plurality of needle rollers arranged along the raceway surface. <P>COPYRIGHT: (C)2007,JPO&INPIT |
