In this paper, the track of the human ankle during running is considered based on human factor engineering in order to optimize the structure of the elliptical trainer. By analyzing the influence of each component parameters on the track of the human ankle, the optimum parameters of each component were determined. The Solidworks 2016 is used for the simulation of the elliptical trainer. The results show that: the best elliptical orbit is obtained when ther1=110 mm, r2=412 mm,r3=140 mm. The theoretical calculation results of the displacement, velocity and acceleration of ankle point are in accordance with the simulation results which verify the rationality of the structure design. The maximum stress during working occurs on the crankshaft, the optimum diameter of crankshaft is 22 mm, and less than the yield strength of the material, so that the structure is safe and reliable.%为了减小椭圆机的尺寸,方便其在各种场合使用,基于人因工程学原理,结合跑步时人体脚踝的运动轨迹,对迷你椭圆机的结构进行优化设计.通过解析分析得到了各组件参数对脚踝轨迹的影响规律,确定了各组件的最佳参数.并应用Solidworks 2016对迷你椭圆机进行了运动和静应力仿真分析.结果表明:当r1=110 mm、r2=412 mm、r3=140 mm时得到的椭圆轨迹最佳;脚踝点的位移、速度、加速度的解析和仿真的结果高度一致,验证了结构设计的合理性;该机构中最大应力处于曲柄轴上,最佳轴径为22 mm,选用的材料满足强度要求,安全性能可靠.
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