| 摘要 |
PROBLEM TO BE SOLVED: To improve durability of a bottom part of a large diameter cylinder part side by devising a shape to facilitate a first top at the large diameter cylinder part side to lean to the large diameter cylinder part side. SOLUTION: The large diameter cylinder part 1 includes a shoulder part 12 connecting to a bellows part 3 at an end part of the bellows part 3 side. The bellows part 3 includes an outside inclined edge part 35 inclined radially inward and extending toward a first bottom part 30 from the shoulder part 12, and an inside edge part 37 connecting to the outside inclined edge part 35 via a bent part 36 and extending radial direction inward from the bent part 36 toward the first bottom part 30. Outer diameterϕA of the first top part 31 and outer diameterϕB of the bent part 36 satisfies a relational expressionϕB<ϕA, and a gap d (0<d≤5.5 t) allowing deformation in a direction in which the outside inclined edge part 35 approaches an end surface 5a side is formed between the end surface 5a of a mating member and the first bottom part 30 under a condition where the large diameter cylinder part 1 is attached to the mating member (joint outer race 5). COPYRIGHT: (C)2009,JPO&INPIT
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