EPICYCLIC GEAR APPARATUS

摘要

PURPOSE: A planetary gear device is provided to extend the lifetime by relatively minimizing the abrasion between a sun gear and a centering member. CONSTITUTION: A plurality of planetary gears are circumscribed with a ring gear. A sun gear (110) is inscribed with the plurality of planetary gears and includes a center hole (115) in the center of an end of one side in the axial direction. The plurality of planetary gears are installed in a carrier (120) and the center of rotation has a support groove corresponding to the center hole and faces the end of one side in the axial direction. The centering member is fitted into the center hole of the sun gear and the support groove of the carrier, respectively. An output shaft (180) is connected to the carrier.