| 摘要 |
A double-row spherical roller bearing comprises an inner race, an outer race, two retainers each molded of a synthetic resin, and double-rows of spherical rollers rotatably received in pockets of the retainers and arranged one after another in the equally spaced relationship in the circumferential direction. Each retainer is molded such that an annular portion on the large diameter side and an annular portion on the small diameter side are integrally jointed to each other with a plurality of retainer bars bridges therebetween. Each retainer bar comprises an inner portion located on the inner race side and an outer portion on the outer race side. Each side surface of the inner portion is defined by a part of the spherical surface extending around the spherical surface of each spherical roller. In addition, each side surface of the outer portion is defined by a first surface, a second surface and a third surface. A wedge-shaped gap is formed between the third surface and the spherical roller on the outer portion side so as to allow lubricant to easily penetrate into the spherical roller bearing therethrough. Additionally, a gap between the side surfaces at the opposite ends of the outer portion and the spherical roller is increasingly widened on the outer portion side. The arrangement of the gaps in that way makes it easy to form a lubricant film in the spherical roller bearing.
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