| 摘要 |
<P>PROBLEM TO BE SOLVED: To maintain service life longer as a whole speed reducer by preventing only partial external gear series from being deteriorated fast by unbalance of a load that the speed reducer receives from the outside. <P>SOLUTION: An eccentrically oscillating speed reducer 40 includes first and second external gears 42 and 44, and first and second internal gears 46 and 48 engaged with the first and second external gears 42 and 44, respectively. Pitch circle diameters d3, d4 of first and second rollers 114 and 124 (elements constituting first and second tooth profiles) of the first and second internal gears 46 and 48 are different, and outer diameters d5, d6 are different. <P>COPYRIGHT: (C)2013,JPO&INPIT |
