Link 1 is connected by screw pair D to the fixed link and by spherical pair E to link 2 which, in turn, is connected by turning pair B to crank 3, rotating about fixed axis A. Rotation of crank 3 about axis A is converted into rotation of link 1 about axis x-x. If crank 3 is the driving link, the helix angle of the thread on link 1 should be greater than the angle of friction.
$2226$LS,4L$