JP2009180307A5 - - Google Patents

Claims (3)

An outer ring having a raceway surface consisting of a part of a spherical surface on the inner circumference;
Two orbital planes that have two axially symmetrical cross sections that pass through the center in the axial direction and that are perpendicular to the axis and that have the same radius as a part of the spherical surface in the section including the axis, An inner ring having a cylindrical surface formed therebetween;
A plurality of convex rollers disposed on the outer raceway surface and the inner race two raceway surfaces, each having an outer peripheral surface coinciding with the inner raceway raceway surface;
In a self-aligning roller bearing provided with a metal cage provided with pockets for arranging the convex rollers at predetermined intervals in the circumferential direction,
The maximum diameter of the cage is larger than the inner diameter of the end face of the outer ring,
The cage is composed of a first member and a second member divided into two in the circumferential direction , and the diameter of the largest virtual circumscribed circle having a center in a plane perpendicular to the radial direction of the cage in the second member Is a self-aligning roller bearing characterized by having a diameter equal to or smaller than the minimum inner diameter of the outer ring .   The self-aligning roller bearing according to claim 1, wherein the cage is guided by either the inner ring or the outer ring. The division angle of the first member is 180 ° + α ° (α is a positive number), the division angle of the second member is 180 ° -β ° (β is a positive number), and α ° and β ° are 2. The self-aligning roller bearing according to claim 1, wherein α ° ≦ β ° and α ° and β ° are substantially the same angle.