Drive couple for notch-to-notch machining movement hinges pushrods to output member joined at far end to swivel-joined rods using connecting rod and crank length for rod extension and register.

摘要

A pushrod (7) hinged at swivel joint (5) in the output link is hinged at its far end via joint (9) to rod (13) swivelling via joint (11) in the frame member (1). Links (19,20) are joined at joints (17,18) on these two rods (12,13) and one link, notably link (20), has a swivel joint (22) to hinge in the connecting rod (16). The kinematic length of the drive crank (14) hinged (15) at the far end of the connecting rod is such that the crank firstly registers to extend or register the pushrods, notably rod (6) and rod (12). Otherwise the crank (14), when extended together with connecting rod (16) extends or registers the other pushrod (7) with the rod (13) connected to it. The output link turns in joint (2) and has three swivel joints (2,4,5).