| 摘要 |
A toothed belt transmission (50) is provided in which a toothed belt (27) is trained around drive and driven pulleys (26,28). Each toothed pulley has a circumferential periphery formed with a plurality of teeth. Adjacent teeth are assigned as a first tooth portion (61) and a second tooth portion (66). Respective tooth portions have arcuate portions (63, 68) at corners defined between tooth edges (62, 67) and tooth surfaces (71, 71). A line touching the arcuate portions of the first and second tooth portions is assigned as a common tangential line (75). A line passing over a starting point of the arcuate portion of the tooth edge of the first tooth is assigned as a first tangential line (74). An angle ( alpha ) between the common tangential line and the first tangential line falls in a range between 6 DEG and 14.4 DEG . <IMAGE> |
