The planar four-bar linkages which have quick-return motion, when it is in its two extreme positions, there is a clear and direct-vision delta relations between parameters of included angle θ of extreme position and parameters of motion size. 具有急回运动的平面四杆机构,当机构处于两个极限位置时,其极位夹角θ等参数与运动尺寸参数之间存在着清晰直观的三角形关系。
This paper set forth the changeability of quick-return motion and quick-return characteristics in the different extreme positions on double crank mechanism, and expressed them in the form of the line graphics ψ 3~θ. 阐述了双曲柄机构具有急回运动程度可变的特点,分析了双曲柄机构在不同极限位置的急回运动特性,并以线图ψ3~θ的形式表示。
Series-Double-Crank Mechanism with Low-Speed and Quick-Return Motion and Its Genetic Algorithm Optimization 双曲柄串联低速急回机构及其遗传算法优化