Patent ID: 6129648
Filing Date: 2000-10-10
Classification: F16H

Abstract:
A planetary gear device which has an internal gear, a pair of main guide bearing disposed on both sides of the internal gear, first and second carriers rotatably supported by the main guide bearings, a plurality of planetary shafts extending between the first and second carriers, a plurality of planetary gears rotatably supported on the respective planetary gears and engaged with the internal gear, a pinion shaft passing through the first carrier coaxially to extend in a device axial line direction, a sun gear formed on an outer circumferential surface of the pinion shaft and engage with the planetary gears, and an output shaft connected to the second carrier and extending in the device axial line direction, wherein the first and second carriers and the output shaft are formed as a unitary member, and further comprising a front-stage side carrier of a front-stage side planetary gear mechanism fixed coaxially to the pinion shaft and a supporting means for supporting a center portion of at least one of axial end surfaces of the pinion shaft in a sliding contact state.