Torsion damping device comprising pendular flyweights that are axially offset in relation to guide washers

A torsion damping device (10) between an axially oriented coaxial drive shaft and driven shaft in an automotive temporary coupling system, the device (10) being equipped with first torsion damping means that comprise:

• a torque input element (20A, 20B) and a torque output element (12) mounted rotatably around an axis coaxial with that of the shafts;
• at least two circumferentially acting elastic members (36) that are interposed circumferentially in series between the input element (20A, 20B) and the output element (12);
• two radial guide washers (20A, 20B) that are arranged axially on either side of the elastic members (36) and that have axial retention means (46, 50, 52) for the elastic members (36), the guide washers (20A, 20B) having a peripheral portion that extends radially outward from the axial retention means (46, 50, 52);
• at least one radial phase washer (38) that is freely rotatable with respect to the input element (20A, 20B) and with respect to the output element (12), the phase washer (38) having at least one radial phasing tab (48) that is interposed circumferentially between the two elastic members (36) in series,
• the damping device being equipped with second torsion damping means that have:
• at least one pendulum flyweight (54A, 54B) that is mounted oscillatingly in a radial plane on a support element (56) that is rotationally integral with the phase washer (38),
• wherein the support element (56) is offset axially on the same side with respect to the peripheral portions of the two guide washers (20A, 20B), in such a way that the pendulum flyweight (54A, 54B) is offset axially on the same side with respect to the peripheral portions of the two guide washers (20A, 20B).