| 摘要 |
PROBLEM TO BE SOLVED: To provide a belt transmission device preventing or suppressing a fall in transmission efficiency of a transmission belt V<SB>1</SB>due to the easy occurrence of concentration of a clearance between mutually adjacent elements on the inlet side of a driving pulley. SOLUTION: The mass of one element 1 is set to m, the length of an end play which is the integrated value of the clearances between the elements 1 in a row of the elements 1 is set to Ep, a pressing force applied to the outer peripheral surface 8<SB>out</SB>and the outer peripheral contact surface 9b at a linear part of the transmission belt V<SB>1</SB>from a driven pulley outlet to a driving pulley inlet is set to F, and time required for the element 1 to reach the driving pulley inlet from the driven pulley outlet at a linear part from the driven pulley outlet to the driving pulley inlet is set to (t). In this case, a ring outer peripheral surface friction coefficientμwhich is the friction coefficient between the outer peripheral surface 8<SB>out</SB>of the ring and the outer peripheral contact surface 9b, satisfies a relation ofμ≥(2×m×Ep)/(F×t<SP>2</SP>). COPYRIGHT: (C)2010,JPO&INPIT
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