| 摘要 |
The purpose of the present invention is to solve the problem of preventing damage and wear from occurring on both the outer ring raceway surface 12a of an outer ring 12 and the inner ring raceway surface 13a of an inner ring 13 even if the amount of runout of a retainer 20 increases, the damage and wear being caused by the contact of the retainer 20 with the outer ring raceway surface 12a and the inner ring raceway surface 13a. A tapered roller bearing 11 has a large contact angle of 35 degrees or greater. The retainer 20 is provided with: a large-diameter ring section 20a and a small-diameter ring section 20b, which are axially separated from each other; and column sections 20c provided at predetermined intervals between the large-diameter ring section 20a and the small-diameter ring section 20b and defining a plurality of pockets P for accommodating and retaining tapered rollers 14. The tapered roller bearing is characterized in that both the gap b between the inner peripheral surface of the large-diameter ring section 20a and the outer diameter surface of a flange section 13 at the large-diameter-side end of the inner ring 13, and the gap a between the inner peripheral surface of the small-diameter ring section 20b and the outer diameter surface of the small-diameter-side protrusion 13c of the inner ring 13 are smaller than the gap c between the inner ring raceway surface 13a of the inner ring 13 and the column sections 20c. |
