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There is a kind of coaxial reducer with steely balls whose input cam,output cam and sprocket wheel are on the same axe. Its volume is small,the structure is simple and the transmission is calm. Especially it is the same with borehole operation which is limited in radial dimension. This paper analyze the principle,the bearing and the intensity of this reducer for popularizing it's application. 介绍了一种钢球同轴减速器。该减速器输入凸轮、输出凸轮、链轮等位于同一轴线,体积小,结构简单,传动平稳。尤其适用于对径向尺寸有限制要求的油田井下作业。文中介绍了该减速器的工作原理,并进行了受力分析和强度计算,方便推广钢球同轴变速器的应用。
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