| 摘要 |
PROBLEM TO BE SOLVED: To prevent generation of remarkable abrasion in the external peripheral surface of a wedge roller even at overrun time rotating an outer ring with a center roller left as stopped. SOLUTION: Lubricating oil is fed into a pressure introducing path 52 by a pump structural part constituted by including fins 50, 50 provided in the external peripheral edge part of an outer ring 13a. The wedge roller 10 is pressed by a dynamic pressure of this lubricating oil toward a part of broad width in an annular space 20a. By this constitution, abrasion of the external peripheral surface of this wedge roller 10 is made difficult, so as to solve the above subject.
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