Planetary gear device and wind power generator for up gear

摘要

PROBLEM TO BE SOLVED: To provide a planetary gearing unit capable of running for a long time without a maintenance by using a compact roller bearing with high rated load and rigidity and reduced surface damage for a supporting bearing of a planetary gearing unit.;SOLUTION: This planetary gearing unit 12 has a sun gear 22, an internal gear 26 surrounding an outer periphery of the sun gear 22, and a planetary gear 24 meshed with both of the sun gear 22 and the internal gear 26. A bearing 40 supporting the planetary gear 24 is provided with a spacer 8 between adjacent rollers 6, and extension parts 8a faced to a roller face 6b on both axial ends of the spacer 8.;COPYRIGHT: (C)2008,JPO&INPIT