초록 ▼

A torsional-vibration damper includes at least one primary element and a secondary element that can be coupled to each other by a spring device, are limited in movement in relation to each other about a rotational axis, and can be brought into frictional contact with each other by a friction device.

A torsional-vibration damper includes at least one primary element and a secondary element that can be coupled to each other by a spring device, are limited in movement in relation to each other about a rotational axis, and can be brought into frictional contact with each other by a friction device. The friction device has at least two friction-surface-carrying elements rubbing against each other to which a contact-pressure force, generated by a force-generating device, can be applied to produce a frictional engagement between the two elements. The force-generating device has a mechanical actuating mechanism for generating an actuating force and a hydraulic actuating mechanism for generating a counterforce, wherein the contact-pressure force is a vector sum of the actuating force and the counterforce.

대표청구항 ▼

1. A torsional-vibration damper comprising:at least one primary element; a secondary element; a spring device adapted to couple said at least one primary element and said secondary element to each other, said at least one primary element and said secondary element being limited in movement in relati

1. A torsional-vibration damper comprising:at least one primary element; a secondary element; a spring device adapted to couple said at least one primary element and said secondary element to each other, said at least one primary element and said secondary element being limited in movement in relation to each other about a rotational axis; a friction device adapted to bring said at least one primary element and said secondary element into frictional contact with each other and including at least two friction-surface-carrying elements rubbing against each other; and a force-generating device adapted to generate a contact-pressure force to be applied to said at least two elements to produce a frictional engagement therebetween, said force-generating device including a mechanical actuating mechanism for generating an actuating force and a hydraulic actuating mechanism for generating a counterforce, wherein the contact-pressure force is a vector sum of said actuating force and said counterforce. 2. A torsional-vibration damper as set forth in claim 1, wherein said mechanical actuating mechanism includes at least one spring element.3. A torsional-vibration damper as set forth in claim 1, further including at least one of a wet-running clutch and a transmission arrangement operating by at least one of a coolant and a hydraulic fluid, said hydraulic actuating mechanism including a pressure-medium-supplying device for supplying said hydraulic actuating mechanism with a pressure medium by which said counterforce can be generated, said pressure medium being said at least one of a coolant and a hydraulic fluid.4. A torsional-vibration damper as set forth in claim 3, wherein said pressure-medium-supplying device is a component of said at least one of a wet-running clutch and a transmission arrangement.5. A torsional-vibration damper as set forth in claim 4, wherein said at least one of a wet-running clutch and a transmission arrangement is a multiple-disc clutch.6. A torsional-vibration damper as set forth in claim 5, wherein said multiple-disc clutch is normally open and said friction device is normally closed.7. A torsional-vibration damper as set forth in claim 5, wherein said multiple-disc clutch is normally closed and said friction device is normally open.8. A torsional-vibration damper as set forth in claim 3, wherein said multiple-disc clutch includes a hydraulic actuating piston, said hydraulic actuating piston and said hydraulic actuating mechanism of said friction device substantially encompassing a common pressure-medium chamber.9. A torsional-vibration damper as set forth in claim 8, wherein said hydraulic actuating piston of said multiple-disc clutch is a component of said hydraulic actuating mechanism of said friction device.10. A torsional-vibration damper as set forth in claim 8, wherein said hydraulic actuating mechanism of said friction device is a component of said hydraulic actuating piston of said multiple-disc clutch.11. A torsional-vibration damper as set forth in claim 2, wherein at least one of said at least two friction-surface-carrying elements is substantially perpendicularly displaceable relative to respective friction surfaces of at least one of adjacent said at least two friction-surface-carrying elements.12. A torsional-vibration damper as set forth in claim 11, wherein said at least one spring element holds said at least one of said at least two friction-surface-carrying elements engaged with said at least one of adjacent said at least two friction-surface-carrying elements.13. A torsional-vibration damper as set forth in claim 11, further including a pressure-medium chamber and wherein said hydraulic actuating mechanism further includes a piston element adjacent said pressure-medium chamber and to which a pressure medium can be applied by said pressure-medium chamber to hold said at least one of said at least two friction-surface-carrying elements disengaged from said at least one of adjacent said at least two friction-surface-carrying elements.14. A torsional-vibration damper as set forth in claim 11, further including a pressure-medium chamber between said at least one of said at least two friction-surface-carrying elements and said at least one of adjacent said at least two friction-surface-carrying elements, where a pressure medium can be applied to said pressure-medium chamber to hold said at least one of said at least two friction-surface-carrying elements disengaged from said at least one of adjacent said at least two friction-surface-carrying elements.15. A torsional-vibration damper as set forth in claim 14, further including a flow-control device for limiting loss of said pressure medium.16. A torsional-vibration damper as set forth in claim 15, further including a sealing device for sealing said pressure-medium chamber.17. A drive train of a motor vehicle, said drive train comprising:a flange representing the driving side of said drive train; a shaft representing the power-take-off side of said drive train; a torsional-vibration damper disposed between said flange and said shaft, wherein a torque introduced on the driving side by rotational speed via said flange can be transmitted via said torsional-vibration damper to said shaft and, thus, to the power-take-off side; said torsional-vibration damper including: at least one primary element; a secondary element; a spring device adapted to couple said at least one primary element and said secondary element to each other, said at least one primary element and said secondary element being limited in movement in relation to each other about a rotational axis; a friction device adapted to bring said at least one primary element and said secondary element into frictional contact with each other and including at least two friction-surface-carrying elements rubbing against each other; and a force-generating device adapted to generate a contact-pressure force to be applied to said at least two elements to produce a frictional engagement therebetween, said force-generating device including a mechanical actuating mechanism for generating an actuating force and a hydraulic actuating mechanism for generating a counterforce, wherein the contact-pressure force is a vector sum of said actuating force and said counterforce.