上海充通大 Planar Linkages and 4-bar mechanism SHANGHAI JIAO TONG UNIVERSITY Types of 4-Bar linkages B Crank Rocker Rocker Crank D A 77777 D A O777 D Crank-rocker Double-rocker Double-crank 曲柄-摇杆机构 双摇杆 Or Drag link 双曲柄 Depend on range of motion of links connected to groundPlanar Linkages and 4-bar mechanism Types of 4-Bar linkages C C B C Crank B B Rocker Rocker Crank Crank A D A D A D Double-rocker 双摇杆 Double-crank Or Drag link 双曲柄 Crank-rocker 曲柄 -摇杆机构 Depend on range of motion of links connected t d o groun d