| 摘要 |
<P>PROBLEM TO BE SOLVED: To easily replace a lubricant in a semi-sealed space 51 with a simple structure. <P>SOLUTION: As a lubrication passage 53 communicating with the semi-sealed space 51 at its one end and opened at the other end at a radial inner side from one end, is formed in a crank shaft 35, large centrifugal force based on the rotation of the crank shaft 35 is acted on the lubricant positioned near one end opening of the lubrication passage 53. As a result, the lubricant stored in a gear device is sucked from the other end opening of the lubrication passage 53, flows in the lubrication passage 53 to be drawn out from one end opening, and is supplied to the semi-sealed space 51. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
