Patent ID: 6720670
Filing Date: 2004-04-13
Classification: F03D,F05B,F16H,Y02E

Abstract:
A gear assembly for a wind driven electrical power generating apparatus, comprising:a casing; an input shaft rotatably supported in the casing; an output shaft rotatably supported in the casing; a sun roller rotating with said output shaft; an outer ring disposed coaxially with said outer ring; and a plurality of kinds of roller groups disposed in a radial direction in a space formed between the sun roller and the outer ring, and being frictionally engaged with the sun roller and the outer ring, wherein each of the roller groups is rotatably disposed at equal intervals in a circumferential direction, the roller groups are disposed being stacked one above another in a radial direction in a multi-stage fashion, and each roller belonging to at least one roller group selected from the roller groups has rollers constructed of a plurality of cylinders to have two raceway surfaces having different rotational radiuses.