Ⅰ型、Ⅱ型曲柄摇杆机构急回特性两个命题的讨论

The Discussion of the Two Propositions About Type Ⅰ and Type Ⅱ Crank-rocker Mechanisms' Quick-return Characteristic

关于Ⅰ型、Ⅱ型曲柄摇杆机构,通过引入"辅助圆"的新概念,以曲柄固定铰链中心点A的可行区域理论为重要基础,在以摇杆摆角ψ为唯一前提参数条件下,得到了关于极位夹角θ、行程速比系数K取值范围及其最大值的一系列重要结论,该系列结论对机构分析和设计具有一定的指导意义.

By introducing a new concept ＂Auxiliary Circle＂ about Type Ⅰ and Type Ⅱ crank-rocker mechanisims, based on the dwell district theory of crank fixed hinge center A, and on the precondition of the only parameter of the rocker angle ψ a series of important conclusions about the range and the maximum value of the crank angle θ between extreme positions and the advence-to return-time ratio K was obtained. These conclusions will have certain guiding significane for mechanism analysis and mechanism design.