A compensating coupling connects a first shaft to a second shaft along an axis of rotation. The compensating coupling has a first coupling body connected to an end of the first shaft and a second coupling body connected to an end of the second shaft. At least one elastic coupling element has a longitudinal axis lying in a plane that is oriented perpendicularly to the axis of rotation. The two coupling bodies are arranged with respect to one another to form a three-dimensional coupling region in which the elastic coupling element is arranged. The elastic coupling element is connected to the two coupling bodies such that the two coupling bodies are displaceable in the radial direction with respect to the axis of rotation. The elastic coupling element is displaceable in the axial direction with respect to the axis of rotation.

A torque transmission joint includes a first elastic body having a plurality of first elastic pieces pinched in a circumferential direction between respective first convex portions and a coupling, and a second elastic body having a plurality of second elastic pieces pinched in the circumferential direction between respective second convex portions and the coupling.

A coupling assembly for transmitting rotational forces from a driving shaft to a driven shaft, the driving and driven shafts having teeth. The coupling assembly includes a first and a second flange, each flange configured to be rotationally fixed onto respective shafts. A pair of resilient shoes are disposed between the flanges. The shoes are configured to be attached to the coupling assembly by a first plurality of fasteners that are fixed to the first flange and extend through the shoes to connect the shoes to the first flange and a second plurality of fasteners are fixed to the second flange and extend through the shoes to connect the shoes to the second flange.

A coupling assembly for transmitting rotational forces from a driving shaft to a driven shaft, the driving and driven shafts having teeth. The coupling assembly includes a first and a second flange, each flange configured to be rotationally fixed onto respective shafts. A pair of resilient shoes are disposed between the flanges. The shoes are configured to be attached to the coupling assembly by a first plurality of fasteners that are fixed to the first flange and extend through the shoes to connect the shoes to the first flange and a second plurality of fasteners are fixed to the second flange and extend through the shoes to connect the shoes to the second flange.

An isolator decoupler comprising a shaft, a pulley journalled to the shaft, a one-way clutch engaged with the shaft, a spring carrier engaged with the one-way clutch, the spring carrier having a spring carrier surface, a torsion spring having a first end laser welded to the pulley and a second end laser welded to the spring carrier, the torsion spring having a volute with a width w, an annular spring support member having a spring support member outside surface, the annular spring support member independently moveable from the spring carrier and independently moveable from the shaft, a gap g between the annular spring support member and the spring carrier, the gap g being less than the width w, the first end comprising a first end coil, the first end coil bearing upon the spring support member outside surface, the first end coil laser welded to the spring support member outside surface, a torsion spring radial contraction limited by engagement with the spring carrier surface, and the gap g and the width w have a relationship (w−2r)>(g+c1+c2) were g>0.

An isolator decoupler comprising a shaft, a pulley journalled to the shaft, a one-way clutch engaged with the shaft, a spring carrier engaged with the one-way clutch, the spring carrier having a spring carrier surface, a torsion spring having a first end laser welded to the pulley and a second end laser welded to the spring carrier, the torsion spring having a volute with a width w, an annular spring support member having a spring support member outside surface, the annular spring support member independently moveable from the spring carrier and independently moveable from the shaft, a gap g between the annular spring support member and the spring carrier, the gap g being less than the width w, the first end comprising a first end coil, the first end coil bearing upon the spring support member outside surface, the first end coil laser welded to the spring support member outside surface, a torsion spring radial contraction limited by engagement with the spring carrier surface, and the gap g and the width w have a relationship (w−2r)>(g+c1+c2) were g>0.

A power transmission device includes an inertia ring, a plate, a plurality of first bolts, a torque transmission member, and a plurality of second bolts. The inertia ring has an annular shape. The inertia ring includes a plurality of through holes. The plurality of through holes are disposed at intervals in a circumferential direction. The plate is disposed on a first side with respect to the inertia ring in an axial direction. The plurality of first bolts are screwed into the plurality of through holes from the first side to fasten the plate to the inertia ring. The torque transmission member is disposed on a second side with respect to the inertia ring in the axial direction. The plurality of second bolts are screwed into the plurality of through holes from the second side to fasten the torque transmission member to the inertia ring.

A power transmission device includes an inertia ring, a plate, a plurality of first bolts, a torque transmission member, and a plurality of second bolts. The inertia ring has an annular shape. The inertia ring includes a plurality of through holes. The plurality of through holes are disposed at intervals in a circumferential direction. The plate is disposed on a first side with respect to the inertia ring in an axial direction. The plurality of first bolts are screwed into the plurality of through holes from the first side to fasten the plate to the inertia ring. The torque transmission member is disposed on a second side with respect to the inertia ring in the axial direction. The plurality of second bolts are screwed into the plurality of through holes from the second side to fasten the torque transmission member to the inertia ring.

A damper device includes a damper unit and a torque limiter unit. The damper unit includes an output plate, an elastic member, first and second input plates. The torque limiter unit includes a pressure plate, first and second side plates. The first side plate has an inner diameter equal to an outer diameter of the output plate. The second side plate has an inner diameter equal to an outer diameter of the first input plate. The pressure plate has an inner diameter equal to an outer diameter of the second input plate. An inner-peripheral surface of the first side plate is not opposed to an outer-peripheral surface of the output plate. An inner-peripheral surface of the second side plate is not opposed to an outer-peripheral surface of the first input plate. An inner-peripheral surface of the pressure plate is not opposed to an outer-peripheral surface of the second input plate.

A damper device includes a damper unit and a torque limiter unit. The damper unit includes an output plate, an elastic member, first and second input plates. The torque limiter unit includes a pressure plate, first and second side plates. The first side plate has an inner diameter equal to an outer diameter of the output plate. The second side plate has an inner diameter equal to an outer diameter of the first input plate. The pressure plate has an inner diameter equal to an outer diameter of the second input plate. An inner-peripheral surface of the first side plate is not opposed to an outer-peripheral surface of the output plate. An inner-peripheral surface of the second side plate is not opposed to an outer-peripheral surface of the first input plate. An inner-peripheral surface of the pressure plate is not opposed to an outer-peripheral surface of the second input plate.