| 摘要 |
PROBLEM TO BE SOLVED: To prevent one side wear on an outer ring raceway and a roller rolling contact surface, and outer leakage of sealed grease. SOLUTION: A case-engaging recessed part 5 is formed at both ends of an outer ring 1 installing double row tapered roller 4 between the outer ring and an inner ring. A fitting cylinder part 8 is provided to the end of a sealing case 7 holding a sealing 10 for preventing invasion of dust into the bearing. The fitting cylinder part 8 is engaged with the case-engaging recessed part 5. A rib 9 provided at the outside diameter face end of the fitting cylinder part 8 is engaged with an engaging groove 6 formed in the case-engaging recessed part 5 at its inside diameter face to anti-release the sealing case 7. Elastic deformation afforded by a elastic body layer 12 anchored to the fitting cylinder part 8 at its outside diameter face prevents the outer ring 1 at its both ends from deformation in the outside diameter direction. The result prevents an outer ring raceway and a roller rolling contact surface from local contact, one side wear, and base oil of sealed grease from outward leakage from a mating part for the case-engaging recessed part 5 and the fitting cylinder part 8.
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