“三角形”铰链四杆直线机构综合方法的研究

分析了 Ball点位于机架上并且直线方向垂直于机架时 ,曲率驻点曲线蜕化的原因和结果。利用欧拉 -萨法利方程得到了此情况下综合四杆直线机构的方法 ,用此方法可综合出具有四个无限接近点 (即所谓的 Ball点 )直线机构。此时的机构外形为一三角形 ,称为“三角形”铰链四杆直线机构。以文中的结论为基础 ,分析了综合出曲柄摇杆机构的条件

On the Synthesis of Delta Four-Bar Straight-line Linkage

We present the cause and result of circle point curve degeneration, when the given Ball's point is located on the fixed bar. The theory to synthesize four bar straight line linkage, whose coupler curve has four infinite points contact with its tangent, is discussed with the help of Euler Savary equation. The figuration of the obtained four bar linkage is like a delta, so the gained four bar linkage is calleda Delta mechanisms. Based on the above synthesis,the conditions for obtaining crank and rocker mechanism is analyzed too.