DOUBLE-ROW AUTOMATIC SELF-ALIGNING ROLLER BEARING

Japanese Patent JP2017061949

A

PROBLEM TO BE SOLVED: To provide a double-row automatic self-aligning roller bearing which is suitable to usage in which loads which are different in magnitudes are applied to left and right roller rows, can stably hold rollers by cages, secures a large load capacity, and can elongate a life.SOLUTION: In a double-row automatic self-aligning roller bearing 1, rollers 4, 5 are interposed between an inner ring 2 and an outer ring 3 in left and right two rows. A raceway surface 3a of the outer ring 3 is spherical, and the rollers 4, 5 in the left and right two rows have cross section shapes at external peripheral faces along the raceway surface 3a of the outer ring 3. Lengths L1, L2 of the left-row roller 4 and the right-row roller 5 differ from each other. Cages 10L, 10R have circular disc parts 11 arranged between the left and right rollers 4, 5, and a plurality of column parts 12 which extend from the circular disc parts 11 toward the outside of a width direction, and the rollers 4, 5 are held between the column parts 12. The cage 10R which holds the long-length roller 5 is thicker than the cage 10L which holds the short-length roller 4 in radial thicknesses of the cross sections of the column parts 12 (t1