Torque limiting shaft coupling - has outer component movable along inner component and against torsion spring by wire seated in helical grooves and acting as thread

摘要

The friction coupling has coaxial driving and driven members whose adjacent surfaces each have a helical groove in which is fitted a wire. A friction surface (G) acts between the pinion (P) and the flange (F) of the outer component. A torsion spring (R) has its ends located in bores in the flange and a plate (V) located by a nut. Under heavy load conditions, the wire (H) acts as a thread allowing movement of the outer component along the inner component along the inner component against the torsion spring.