Patent ID: 7828485
Filing Date: 2010-11-09
Classification: F01L,F16C

Abstract:
1. A roller bearing comprising: an outer ring cylindrically formed by combining a pair of split pieces split in a circumferential direction with each other so as to have an axis line in common with a rotating shaft; a plurality of rollers disposed rollably between raceway surfaces respectively formed on an inner peripheral surface of said outer ring and an outer peripheral surface of said rotating shaft; and an annular cage configured to circumferentially hold said rollers at predetermined intervals, wherein said outer ring comprises body portions formed in an axial intermediate portion thereof and a pair of rib portions, the outer-ring-side raceway surface being formed on an inner peripheral surface of each of said body portions, each of said rib portions being formed so as to extend toward the axis line from both axial end portions configured to sandwich each of said body portions so that an end surface thereof is located radially inwardly from the outer-ring-side raceway surface of an associated one of said body portions; said rollers roll about on the raceway surfaces respectively formed on the inner peripheral surfaces of said body portions of said outer rings and the outer peripheral surface of said rotating shaft; said cage comprises a pair of annular portions continuously formed over the entirety of a circumference axially outwardly from both end surfaces of said rollers, and a plurality of column portions configured to connect said annular portions along an axial direction circumferentially at predetermined intervals so as to form pockets in which said roller are accommodated, a projection portion formed integrally with each of said column portions such that said projection portion protrudes outwardly over outer peripheral surfaces of said annular portions; and the outer peripheral surface of each of said annular portions of said cage is disposed so as to face the inner peripheral surface of an associated one of said rib portions of said outer rings via a predetermined clearance.