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对非圆链传动进行初步运动分析。文中重点对非圆链传动（仅以椭圆链轮为例）机构瞬时传动比进行精确计算，所用公式由ＭａｔｈＣＡＤ推导得到。阐述了链轮齿数、链轮椭圆度与链传动中心距对瞬时传动比的影响，并在ＡｕｔｏＣＡＤ上显示、输出了相应的变化曲线。
Preliminary kinematic analysis of non-circular chain drive. In this paper, the emphasis is on the accurate calculation of momentary transmission ratio of non-circular chain transmission (only using elliptic sprocket). The formulas used are derived from MathCAD. The influence of sprocket number, sprocket ellipticity and chain drive center distance on instantaneous transmission ratio is expounded, and the corresponding curve is displayed on AutoCAD.