The design method of double crank mechanism and optimum transmission double crank mechanism are presented according to the conditions of minimum transmission angle, the time ratio, the factor of velocity variety or the minimum size.

• 摘要研究了按照最小传动角、速度变化系数、行程速比系数以及尺寸和最小等条件设计双曲柄机构以及最佳传动双曲柄机构的方法。