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作者在Freudenstein定理的基础上,探讨了铰链四杆机构传动比出现极值且两连架杆的相对速度瞬心P_(24)在短连架杆轨迹圆上和圆内时,机构是否存在曲柄的特性。
On the basis of Freudenstein’s theorem, the author discusses whether there is a crank in the mechanism when there is an extreme value of the transmission ratio of the hinged four-bar mechanism and the instantaneous center of instantaneous velocity P_ (24) Features.