【摘要】 以两原动件运动的任意组合使机构运转到最难达到的位置作为机械模型，推导出两自由度五杆机构的可动性充分条件。提出的两种五杆两自由度机构的可动性充分条件为机构尺寸综合提供了尺寸约束条件。这一原理和方法也可以用于更为复杂的两自由度机构更多还原

【Abstract】 Based on to the most difficult positions that the mechanisms with two driving members can reach,this paper derived the movable sufficient condition of the two freedom five bar linkage mechanisms.The principle and the method used here can also be applied to more complex mechanisms with two freedom. Two movable sufficient conditions of the two freedom five bar linkage mechanisms proposed in this paper have provided the dimensional constraint condition for the dimensional synthesis of mechanisms.更多还原