Patent ID: 8747278

Claim:
A planet carrier assembly of an epicyclic gear system, comprising: a cage-type planet carrier ( 18 ) with two walls ( 11 , 12 ); planetary shafts ( 8 ) connected fixedly to the planet carrier ( 18 ); planetary bearings ( 7 ); at least two planetary wheels ( 6 ) mounted rotatably to each planetary shaft ( 8 ) using the planetary bearings ( 7 ), teeth ( 14 ) of the planetary wheels ( 6 ) being one of i) helical teeth and ii) chevron teeth; the planetary wheels ( 6 ) placed between two walls ( 11 , 12 ) of the planet carrier ( 18 ), each of the two walls ( 11 , 12 ) of the planet carrier ( 18 ) supporting a corresponding one planetary shaft ( 8 ) on either side of the planetary wheels ( 6 ), wherein, each of the planetary wheels ( 6 ) is supported by at least one of the planetary bearings ( 7 ), and each planetary bearing ( 7 ) is a double-row tapered roller bearing having an outermost bearing ring ( 15 ), the outermost bearing ring ( 15 ) of each double-row tapered roller bearing being integrated in the planetary wheel ( 6 ) concerned, wherein the planetary bearings further comprise inner bearing rings ( 17 ), and wherein the inner bearings rings ( 17 ) of the planetary bearings ( 7 ) of each planetary shaft ( 8 ) are in direct contact with each other.