| 摘要 |
PROBLEM TO BE SOLVED: To prevent increase in the load capacity and damage of a raceway surface due to excess surface pressure by increasing the number of rollers, substantialize low torque without deteriorating the rigidity of a bearing, and suppress the occurrence of dragging torque. SOLUTION: The tapered roller bearing comprises an inner ring 2, an outer ring 3, a plurality of tapered rollers 4 which are disposed between the inner ring 2 and the outer ring 3 and is capable of freely rolling the between those rings, and a retainer 5 circumferentially holding the tapered rollers 4 thereon at specified intervals. The outer diameter of the retainer 5 is set to a size to form a clearance between the outer peripheral face of the retainer and the outer ring raceway surface during rotation of a bearing when the retainer center moves to the axial center. A tapered face 5d where the external-diameter face of the tapered rollers 4 slidingly contacts on both side of the inner-diameter face of a column part 5c formed between pockets 5e is provided. A length of the tapered face 5d in the width direction is set to 5% or more and less than 11% of the average diameter of the tapered rollers 4. The roller factorγis set to 0.94 or more. COPYRIGHT: (C)2007,JPO&INPIT
|
