TOOTHED BELT AND BELT TRANSMISSION DEVICE USING TOOTHED BELT

摘要

PROBLEM TO BE SOLVED: To suppress uneven speed while maintaining a sufficient jumping preventing capacity. SOLUTION: A sectional shape of a belt tooth portion 34 of a toothed belt 30 is formed into a continuous composite arc shape formed axisymmetrically about an axis on a centerline Y and composed of first to third arcs BC1 to BC3 forming respective pairs across the centerline Y. The sectional shape is defined so that an aspect ratio as a ratio of a tooth height h to a tooth width (a) is a value in a range of 0.69 to 0.90.