Patent ID: 8096203
Filing Date: 2012-01-17
Classification: F16C,F16H,Y10T

Abstract:
1. A chain type transmission assembly comprising: a screw defined with a helical groove on its outer surface; a nut defined with a hole, an inner surface of the hole of the nut being formed with a helical groove which cooperates with the helical groove of the screw to define a load path therebetween, a circulating member being provided with a return path and disposed in the nut, and the return path of the circulating member being connected to the load path to form an endless circulating path; a rolling module disposed in the endless circulating path and comprising a plurality of rolling elements and a chain, the chain including a plurality of spacers and two links, the spacers are located among the rolling elements in such a manner that between each two neighboring rolling elements is arranged one spacer, the links being located at both sides of the spacers to connecting them together, the links each have a thickness K which satisfies the below equation: PCD: pitch circle diameter S: distance between two neighboring rolling elements D: outer diameter of the screw BD: diameter of the rolling elements.