Torsional vibration damper and torsional vibration damper system

1. A device ( 1 ) for transmitting torque for driving an auxiliary unit, in particular an alternator and for damping torsional vibrations, said device comprising:

driving means ( 2 ) that can be driven about an axis of rotation ( 4 ) by an internal combustion engine,

output drive means ( 3 ) rotatable about the axis of rotation ( 4 ) that are arranged and designed for driving the auxiliary unit, wherein

at least one axial front face of the driving means ( 2 ) and/or of the output drive means ( 3 ) carries permanent magnet means ( 10 , 11 ) which allow torques to be transmitted between the driving means ( 2 ) and the output drive means ( 3 ) and which allow torsional vibrations to be dampened, poles ( 13 , 14 , 15 , 16 ) of the permanent magnet means ( 10 , 11 ) being arranged in at least one radial plane,

wherein

(i) the permanent magnet means ( 10 , 11 ) comprise a plurality of permanent magnet elements ( 17 ) arranged next to each other in the circumferential direction, these permanent magnets ( 17 ) adjoining each other directly in contact or fixed to each other via an adhesive layer of less than 2 mm thickness,

and/or wherein

(ii) the permanent magnet means ( 10 , 11 ) comprise at least one shaped part made of plastic, in particular an injection-moulded part made of plastic and/or a shaped part made of a sintered material,

and/or wherein

(iii) the permanent magnet means ( 10 , 11 ) are arranged on a geometrical circular orbit,

and wherein

relative rotation of the drive means ( 2 ) and output drive means ( 3 ) is further limited by at least one mechanical interlocking driving connection ( 5 , 6 ), wherein a plurality of mechanical interlocking driving connections ( 5 , 6 ) are arranged on an annular orbit which extends concentrically to the rotational axis ( 4 ) or on a non-circular annular orbit and limit relative rotational ability of the drive means ( 2 ) and the output drive means ( 3 ) around a segment of rotation.

2. The device according to claim 1 , wherein the permanent magnet means ( 10 , 11 ) are adhesively bonded and/or mechanically fixed, in particular caulked, to the drive means ( 2 ) and/or the output drive means ( 3 ).

3. The device according to claim 1 , wherein the permanent magnet means ( 10 , 11 ) are accommodated in the drive means ( 2 ) and/or the output drive means ( 3 ) without an encapsulation medium in a frontal recess, in particular a groove ( 20 ), which extends in the circumferential direction.

4. The device according to claim 1 , wherein the adjacent permanent magnet elements ( 17 ) of the permanent magnet means ( 10 , 11 ) have a ring segment contour, in particular a circular ring segment contour or elliptical ring segment contour.

5. The device according to claim 1 , wherein the adjacent permanent magnet elements ( 17 ) adjoin each other each with a contact surface ( 18 , 19 ) which lies in a radial plane relative to an axis of rotation ( 4 ) of the device.

6. The device according to claim 1 , wherein the at least one plastic shaped part has an annular shape, in particular a circular or an elliptical annular shape, or a ring segment shape that extends over a peripheral angle of at least 45°, around the axis of rotation ( 4 ), in particular a circular ring segment shape or an elliptical ring segment shape.

7. The device according to claim 1 , wherein the permanent magnet elements ( 17 ) and/or the permanent magnet means ( 10 , 11 ), arranged on a annular orbit which deviates from a circular annular orbit ( 27 , 28 ), are formed from a permanent-magnetic solid material, and/or designed as shaped parts made of plastic and/or as shaped parts made of sintered material.

8. The device according to claim 1 , wherein the geometric, annular orbit ( 27 , 28 ) which deviates from a concentric circular orbit, is mirror symmetrical.

9. The device according to claim 1 , wherein only the drive means ( 2 ) comprise permanent magnet means ( 10 , 11 ) for transmitting torque and the output drive means ( 3 ) comprise a section of material assigned to said means, in particular a material insert, made of a material which conducts the magnetic flux, or vice versa.

10. The device according to claim 1 , wherein the drive means ( 2 ) and the output drive means ( 3 ) each have only one torque transmission disc ( 24 , 25 ), wherein the torque transmission discs are located axially opposite each other, in particular with an intermediate gap ( 12 ), or wherein the drive means ( 2 ) comprise at least two torque transmission discs, which each receive a torque transmission disc of the output drive means ( 3 ) between themselves in the manner of a sandwich, or wherein the output drive means ( 3 ) comprise at least two torque transmission discs, which each receive one torque transfer disc of the drive means ( 2 ) between themselves in the manner of a sandwich.

11. A system having a device according to claim 1 , which is coupled in a torque-transmitting manner to an auxiliary unit, in particular an alternator in a motor vehicle.

12. The device according to claim 1 , wherein the alternator is in a motor vehicle.

13. The device according to claim 1 , wherein the permanent magnet means ( 10 , 11 ) are arranged on a concentric annular orbit.

14. The device according to claim 1 , wherein the permanent magnet means ( 10 , 11 ) are arranged on an elliptical orbit.

15. The device according to claim 6 , wherein the at least one plastic shaped part extends over a peripheral angle of at least 90°.

16. The device according to claim 6 , wherein the at least one plastic shaped part extends over a peripheral angle of at least 120°.