| 摘要 |
Noise and vibration of a helically toothed-belt transmission device driven in a high-load or high-speed condition are reduced. A backlash (D) is set large in a helically toothed- belt transmission device that transmits drive force by meshing between a helically toothed belt and a helically toothed pulley. That is, a tooth helix angle (Theta) is set in a range of -0.2<= 1-W.tanTheta /Pt<= 0.75, with Pt being a teeth pitch, Theta a tooth helix angle, W the width of the belt. The backlash (D) between the helically toothed belt and the helically toothed pulley is set to be 1.6%-3% of the tooth pitch (Pt).
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