| 摘要 |
PURPOSE:To enable to continuously change the angular velocity of an output shaft by a simple structure wherein a pair of gear wheels of right circule with equal modules and numbers of teeth are engaged with each other and at the same time eccentrically supported rotatably. CONSTITUTION:A driving gear wheel 1 and a driven gear wheel 2, both of which are fittingly fixed onto an input shaft 3 and an output shaft 4 respectively, are gear wheels of right circule with equal modules and numbers of teeth and rotatably housed through bearings 5 respectively in a casing 6. In addition, the centers of rotation (f) and (g) of the respective gear wheels 1 and 2 lie on a straight line (l) connecting the centers (j) and (k) of base circles (h) and (i) under the state that the gear wheels 1 and 2 are engaged with each other and yet are located offset the centers (j) and (k) by the distance (m) respectively. The above- mentioned speed change gear wheels are employed to variable-speed drive such as a stretching fork. When the input shaft 3 is driven at uniform angular velocity, the angular velocity can be continuously changed in the midway of each period, which corresponds to one revolution of the gear wheel, resulting in enabling to realize the transfer of cargo with no fear of collapse of cargo piles and the like. |
