TORSIONAL VIBRATION DAMPING COUPLING

摘要

A torsional vibration damping coupling including a first coupling element (11) rotatable about an axis, and a second coupling element connectable to the first element (11). Each of the first (11) and second elements include a plurality of projections (16-17 and 18-19) respectively disposed about the axis and are arranged such that any one projection of either the first (11) or second elements is circumferentially interposed between two projections of the other element. A torque is transmissible between the elements and a plurality of resilient members (30 to 33) are interposed between successive ones of the projections (16 to 19), which allow limited angular rotation between the elements against the action of the resilient members (30 to 33). Viscous damping means include an annular cavity (15) formed between the first (11) and second elements for containing damping fluid. The cavity (15) being divided by the projections (16 to 19) into a plurality of chambers (20 to 23), wherein each chamber contains a resilient member (30 to 33). The viscous damping means further includes a fluid passage (24 to 27) between selected ones of the chambers (20 to 23) to facilitate viscous damping of torsional vibrations.