SELF-ALIGNING ROLLER BEARING

摘要

A self-aligning roller bearing includes an outer ring, an inner ring, spherical rollers, a cage having a plurality of pockets that contain the spherical rollers, and a guide ring. Each spherical roller may be rotated on an imaginary line passing through a contact point at which the spherical roller contacts an outer raceway surface and a contact point at which the spherical roller contacts an inner raceway surface. Each pocket has a clearance between the pocket and a corresponding spherical roller, and the size of the pocket is set so that the rotation of the corresponding spherical roller is limited. The guide ring has such a side-surface shape that a small clearance is ensured between the spherical roller and the guide ring even when the spherical roller is rotated, in the pocket, on the imaginary line by a maximum amount at which the rotation of the spherical roller is limited.

主权项

1. A self-aligning roller bearing comprising:
an outer ring having an outer raceway surface in an inner periphery of the outer ring, the outer raceway surface being a concave curved surface; an inner ring having two rows of inner raceway surfaces in an outer periphery of the inner ring, the inner raceway surfaces each being a concave curved surface; a plurality of spherical rollers arranged in two rows between the outer raceway surface and the inner raceway surfaces; a cage having a plurality of pockets that contain the spherical rollers arranged in two rows so that the spherical rollers in each row are spaced apart from one another in a circumferential direction; and a guide ring arranged between the cage and the inner ring, and between the two rows of spherical rollers, wherein each of the spherical rollers is rotated on an imaginary line passing through a contact point at which the spherical roller contacts the outer raceway surface and a contact point at which the spherical roller contacts corresponding one of the inner raceway surfaces; each of the pockets has a clearance between the pocket and the spherical roller, and the size of the pocket is set so that the rotation of the spherical roller is limited; and the guide ring has such a side-surface shape that a small clearance is ensured between each of the spherical rollers and the guide ring even when each of the spherical rollers is rotated, in each of the pockets, on the imaginary line by a maximum amount at which the rotation of the spherical rollers is limited.