| 摘要 |
PROBLEM TO BE SOLVED: To efficiently transmit large motive power regardless of a transmission gear ratio by connecting a driving pulley and a driven pulley to each other by many thin metallic belt, and performing curvature motion by each metallic belt while rotating the pulleys with same angular speed. SOLUTION: When a driving shaft 11 is rotated by a power source, turning effort of the driving shaft 11 is transmitted to a driven shaft 19 through two metallic belts 27 which are wrapped between the driving pulley 17 composed of first and second driving pulley pieces 13, 15 freely to advance/retreat along an axial direction of the driven shaft 11, and the driven pulley 25 composed of first and second driven pulley pieces 21, 23 freely to advance/retreat along an axial direction of the driven shaft 19. Belt guide parts 14, 16; 22, 24 which are provided with an inner belt 45 and an external belt 47 and which are composed of an inclining part formed in a nearly recessed curve surface, are formed on each surface opposed to the pulley pieces of the driving pulley 17 and the driven pulley 25, as two metallic belt 27. Each of belts 45, 47 can thereby make curvilinear motion at the same angular speed.
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