TAPERED ROLLER BEARING

Japanese Patent JP2021188719

A

To find a design standard of an outer ring collar-type tapered roller bearing having a load capacity with respect to a pure axial load and a moment load, and a sufficient bearing life, and secured in the rigidity of an outer ring collar part.SOLUTION: A tapered roller bearing 11 comprises: an outer ring 12 having an outer ring raceway surface 12a at an internal peripheral face; an inner ring 13 having an inner ring raceway surface 13a at an external peripheral face; a plurality of tapered rollers 14 rollingly arranged between the outer ring raceway surface 12a and the inner ring raceway surface 13a; and a cage 15 having a plurality of pockets for accommodating and holding the plurality of tapered rollers 14 at prescribed intervals. A collar part 12b protruding to the inside of a radial direction is formed at a large-diameter side end part of the outer ring raceway surface 12a of the outer ring 12 out of four end parts of a small-diameter side end part and a large-diameter side end part of the outer ring raceway surface 12a of the outer ring 12, and a small-diameter side end part and a large-diameter side end part of the inner ring raceway surface 13a of the inner ring 13. A contact angle is set to 40° to 50°, and a relationship between a wall thickness E of the outer ring collar and a roller large-diameter side diameter Dw satisfies 0.19