Patent ID: 9422981
Filing Date: 2016-08-23
CPC Classification: B21D,B21J,B21K,B23P,F16C

Claim Text:
1. A roller bearing cage configured such that a pair of ring parts axially separated from each other is connected by a plurality of column parts sliding on outer peripheral surfaces of conical rollers or spherical rollers as rolling elements, and a plurality of pocket holes is evenly formed in a peripheral wall portion in a circumferential direction to store and hold the rolling elements, wherein a base body including one of the ring parts and the column parts with square columnar convexes at leading ends thereof and a connection body including the other ring part with square holes for fitting with the square columnar convexes of the column parts are set as separate members, wherein these members are manufactured based on blanks obtained by cutting and processing steel plates, wherein the column parts of the base body are formed by folding along an outer peripheral portion of the ring part of the base body or are formed by folding along an inner peripheral portion of the ring part of the base body, wherein when the column parts of the base body are formed by folding along the outer peripheral portion of the ring part of the base body, tongue pieces are formed so as to be protruded from the outer peripheral portion of the ring part of the base body to between the column parts, and inclined surfaces to be in surface contact with end surfaces of the rolling elements are formed in the tongue pieces, wherein when the column parts of the base body are formed by folding along the inner peripheral portion of the ring part of the base body, tongue pieces are formed so as to be protruded from the inner peripheral portion of the ring part of the base body to between the column parts, and inclined surfaces to be in surface contact with the end surfaces of the rolling elements are formed in the tongue pieces, and wherein the base body and the connection body are joined and fixed together while the square columnar convexes of the base body are fitted into the square holes of the connection body.