| 摘要 |
PURPOSE:To eliminate the unbalanced vibration of a planet gear unit of internal engagement type during its rotation, by placing a plurality of planet gears of internal engagement type symmetrically to one another with regard to a point. CONSTITUTION:A plurality of cylindrical cams 2 for eccentricity are secured on a drive shaft 1 so that the cams are located symmetrically to one another with regard to a point. Planet gears 4, 4 movably fitted on the cylindrical cams 2 are engaged with an internal gear 8 so that the planet gears are located symmetrically to one another with regard to a point. Pins 6 integrally coupled with the internal gear 8 are movably fitted in the fitting holes 5 of the planet gears 4, 4 so that the internal gear is driven at a reduced speed when the drive shaft 1 is rotated. |
