【摘要】 提出了Ⅰ型、Ⅱ型平面曲柄摇杆机构极位夹角取值范围的重要命题及证明和Ⅰ型、Ⅱ型和O型平面曲柄摇杆机构最长杆归属的重要命题及证明。这两大命题的提出及证明,有助于加深对平面曲柄摇杆机构性质的理解和认识。更多还原

【Abstract】 With regard to the type I and type II planar crank and rocker mechanisms the important proposition and proof on the numeric area of its included angle between extreme positions were put forward.Concerning the type I,type II and type O planar crank and rocker mechanisms the important proposition and proof on the jurisdiction of the longest lever were advanced.The brought forward and proof of these two big propositions were helpful to deepening the understanding and the recognizing on the characteristics of planar crank and rocker mechanism.更多还原