Torsional vibration damper

A torsional vibration damper comprising:

• a first damper element;
• a second damper element rotatable relative to the first damper element around a rotational axis;
• first damping spring means for connecting the first and the second damper elements for torque transmission, the first damping spring means including at least one damping spring arrangement which extends in approximately a circumferential direction and has at least one damping spring;
• support means for supporting the damping spring arrangement, the support means being provided on the first damper element, the support means including support elements which support end areas of the spring arrangement in a substantially circumferential direction, the first damper element having a displacement surface for each support element, along which displacement surface a correspondingly configured displacement surface of the associated support element is movable in the circumferential direction;
• respective carrier means on the second damper element for each of the support elements for carrying the support elements along on the first damper element for displacement movement of the support element alone the associated displacement surface, and pressing the respective support element toward the displacement surface, upon relative rotation between the first and the second damper elements;
• and
• overload protection means for damping torque peaks to be transmitted via the torsional vibration damper, the overload protection means including a frictional force production device operatively arranged to act between the first and the second damper elements so as to produce a frictional force that increases as the relative rotational angle increases between the first and second damper elements.

A torsional vibration damper comprising:

• a first damper element;
• a second damper element rotatable relative to the first damper element around a rotational axis;
• first damping spring means for connecting the first and the second damper elements for torque transmission, the first damping spring means including at least one damping spring arrangement which extends in approximately a circumferential direction and has at least one damping spring;
• support means for supporting the damping spring arrangement, the support means being provided on the first damper element, the support means including support elements which support end areas of the spring arrangement in a substantially circumferential direction, the first damper element having a displacement surface for each support element, along which displacement surface a correspondingly configured displacement surface of the associated support element is movable in the circumferential direction;
• respective carrier means on the second damper element for each of the support elements for carrying the support elements along on the first damper element for displacement movement of the support element along the associated displacement surface, and pressing the support element toward the displacement surface, upon relative rotation between the first and the second damper elements;
• and
• bearing means for rotatably mounting the second damper element on the first damper element, the bearing means being configured so that the first and the second damper elements can carry out at least one of a tilting movement and a shifting movement in the radial direction, the carrier means on the second damper element having a convex carrier surface.

A torsional vibration damper comprising:

• a first damper element;
• a second damper element rotatable relative to the first damper element around a rotational axis;
• first damping spring means for connecting the first and the second damper elements for torque transmission, the first damping spring means including at least one damping spring arrangement which extends in approximately a circumferential direction and has at least one damping spring;
• support means for supporting the damping spring arrangement, the support means being provided on the first damper element, the support means including support elements which support end areas of the spring arrangement in a substantially circumferential direction, the first damper element having a displacement surface for each support element, along which displacement surface a correspondingly configured displacement surface of the associated support element is movable in the circumferential direction;
• respective carrier means on the second damper element for each of the support elements for carrying the support elements along on the first damper element for displacement movement of the support element along the associated displacement surface, and pressing the support element toward the displacement surface, upon relative rotation between the first and the second damper elements, the first damper element having a substantially axially extending cylinder-like section, the displacement surface being formed on an inner circumferential surface of the cylinder-like section;
• and means for axially securing the support elements, the securing means being arranged to act between the first damper element and each support element.

A torsional vibration damper, comprising:

• a first damper element;
• a second damper element rotatable relative to the first damper element around a rotational axis;
• first damping spring means for connecting the first and the second damper elements for torque transmission, the first damping spring means including at least one damping spring arrangement which extends in approximately a circumferential direction and has at least one damping spring;
• support means for supporting the damping spring arrangement, the support means being provided on the first damper element, the support means including support elements which support end areas of the spring arrangement in a substantially circumferential direction, the first damper element having a displacement surface for each support element, along which displacement surface the associated support element is movable in the circumferential direction;
• carrier means on the second damper element for each of the support elements for carrying the support elements along on the first damper element for displacement movement of the support element along the associated displacement surface, and pressing the respective support element toward the displacement surface, upon relative rotation between the first and the second damper elements, the first damper element having a substantially axially extending cylinder-like section, the displacement surface being formed on an inner circumferential surface of the cylinder-like section;
• and
• means for axially securing the support elements, the securing means being arranged to act between the first damper element and each support element, the support element axial securing means including a circumferential groove on an element of the displacement surface and the support element and, on another respective element, a security projection area that engages into the circumferential groove.

A torsional vibration damper, comprising:

• a first damper element;
• a second damper element rotatable relative to the first damper element around a rotational axis;
• first damping spring means for connecting the first and the second damper elements for torque transmission, the first damping spring means including at least one damping spring arrangement which extends in approximately a circumferential direction and has at least one damping spring;
• support means for supporting the damping spring arrangement, the support means being provided on the first damper element, the support means including support elements which support end areas of the spring arrangement in a substantially circumferential direction, the first damper element having a displacement surface for each support element, along which displacement surface the associated support element is movable in the circumferential direction;
• carrier means on the second damper element for each of the support elements for carrying the support elements along on the first damper element for displacement movement of the support element along the associated displacement surface, and pressing the respective support element toward the displacement surface, upon relative rotation between the first and the second damper elements, the first damper element having a substantially axially extending cylinder-like section, the displacement surface being formed on an inner circumferential surface of the cylinder-like section;
• means for axially securing the support elements, the securing means being arranged to act between the first damper element and each support element, the damping spring means including at least two damping springs, and a movable intermediate element arranged to support adjacent end areas of the damping springs, the intermediate element being movable on the displacement surface relative to the first damper element in the circumferential direction;
• and
• means for axially securing the intermediate element, the intermediate element actual securing means including a circumferential groove on an element of the displacement surface and the intermediate element and, on another respective element, a securing projection area that engages into the circumferential groove.

A torsional vibration damper, comprising:

• a first damper element;
• a second damper element rotatable relative to the first damper element around a rotational axis;
• first damping spring means for connecting the first and the second damper elements for torque transmission, the first damping spring means including at least one damping spring arrangement which extends in approximately a circumferential direction and has at least one damping spring;
• support means for supporting the damping spring arrangement, the support means being provided on the first damper element, the support means including support elements which support end areas of the spring arrangement in a substantially circumferential direction, the first damper element having a displacement surface for each support element, along which displacement surface a correspondingly configured displacement surface of the associated support element is movable in the circumferential direction;
• respective carrier means on the second damper element for each of the support elements for carrying the support element along on the first damper element for displacement movement of the support element along the associated displacement surface, and pressing the respective support element toward the displacement surface, upon relative rotation between the first and the second damper elements;
• and
• a lubricant chamber in a region of the displacement surface, which lubricant chamber is sealed at least radially and contains a lubricant therein, the carrier means on the second damper element having a convex carrier surface.

A torsional vibration damper, comprising:

• a first damper element;
• a second damper element rotatable relative to the first damper element around a rotational axis;
• first damping spring means for connecting the first and the second damper elements for torque transmission, the first damping spring means including at least one damping spring arrangement which extends in approximately a circumferential direction and has at least one damping spring;
• support means for supporting the damping spring arrangement, the support means being provided on the first damper element, the support means including support elements which support end areas of the spring arrangement in a substantially circumferential direction, the first damper element having a displacement surface for each support element, along which displacement surface a correspondingly configured displacement surface of the associated support element is movable in the circumferential direction;
• respective carrier means on the second damper element for each of the support elements for carrying the support elements along on the first damper element for displacement movement of the support element along the associated displacement surface, and pressing the respective support element toward the displacement surface, upon relative rotation between the first and the second damper elements;
• a lubricant chamber in a region of the displacement surface, which lubricant chamber is sealed at least radially and contains a lubricant therein;
• and
• overload protection means for damping torque peaks to be transmitted via the torsional vibration damper, the overload protection means including a frictional force production device operatively arranged to act between the first and the second damper elements so as to produce a frictional force that increases as the relative rotational angle increases between the first and second damper elements, the frictional force production device being configured to produce substantially no frictional force up to a threshold relative rotational angle and, after the threshold relative rotational angle is exceeded, produces one of a substantially constant frictional force and a frictional force that increases as the relative rotational angle increases.

A torsional vibration damper, comprising:

• a first damper element;
• a second damper element rotatable relative to the first damper element around a rotational axis;
• first damping spring means for connecting the first and the second damper elements for torque transmission, the first damping spring means including at least one damping spring arrangement which extends in approximately a circumferential direction and has at least one damping spring;
• support means for supporting the damping spring arrangement, the support means being provided on the first damper element, the support means including support elements which support end areas of the spring arrangement in a substantially circumferential direction, the first damper element having a displacement surface for each support element, along which displacement surface a correspondingly configured displacement surface of the associated support element is movable in the circumferential direction;
• respective carrier means on the second damper element for each of the support elements for carrying the support elements along on the first damper element for displacement movement of the support element along the associated displacement surface, and pressing the respective support element toward the displacement surface, upon relative rotation between the first and the second damper elements;
• and
• a lubricant chamber in a region of the displacement surface, which lubricant chamber is sealed at least radially and contains a lubricant therein, the damping spring arrangement including at least two damping springs, and an intermediate element arranged to support adjacent ends of the two damping springs, the intermediate element being movable relative to the first damper element in the circumferential direction, a plurality of the damping spring arrangements being arranged at substantially a uniform distance from one another in the circumferential direction, the intermediate elements being arranged on a carrier ring rotatable relative to the first damper element.

A torsional vibration damper, comprising:

• a first damper element;
• a second damper element rotatable relative to the first damper element around a rotational axis;
• first damping spring means for connecting the first and the second damper elements for torque transmission, the first damping spring means including at least one damping spring arrangement which extends in approximately a circumferential direction and has at least one damping spring;
• support means for supporting the damping spring arrangement, the support means being provided on the first damper element, the support means including support elements which support end areas of the spring arrangement in a substantially circumferential direction, the first damper element having a displacement surface for each support element, along which displacement surface a correspondingly configured displacement surface of the associated support element is movable in the circumferential direction;
• respective carrier means on the second damper element for each of the support elements for carrying the support elements along on the first damper element for displacement movement of the support element along the associated displacement surface, and pressing the respective support element toward the displacement surface, upon relative rotation between the first and the second damper elements;
• a lubricant chamber in a region of the displacement surface, which lubricant chamber is sealed at least radially and contains a lubricant therein, the first damper element having a substantially axially extending cylinder-like section, the displacement surface being formed on an inner circumferential surface of the cylinder-like section;
• and
• means for axially securing the support elements, the securing means being arranged to act between the first damper element and each support element.

A torsional vibration damper, comprising:

• a first damper element;
• a second damper element rotatable relative to the first damper element around a rotational axis;
• first damping spring means for connecting the first and the second damper elements for torque transmission, the first damping spring means including at least one damping spring arrangement which extends in approximately a circumferential direction and has at least one damping spring;
• support means for supporting the damping spring arrangement, the support means being provided on the first damper element, the support means including support elements which support end areas of the spring arrangement in a substantially circumferential direction, the first damper element having a displacement surface for each support element, along which displacement surface a correspondingly configured displacement surface of the associated support element is movable in the circumferential direction;
• respective carrier means on the second damper element for each of the support elements for carrying the support elements along on the first damper element for displacement movement of the support element along the associated displacement surface, and pressing the respective support element toward the displacement surface, upon relative rotation between the first and the second damper elements;
• and
• a lubricant chamber in a region of the displacement surface, which lubricant chamber is sealed at least radially and contains a lubricant therein;
• and
• overload protection means for damping torque peaks to be transmitted via the torsional vibration damper, the overload protection means comprising a slip clutch arrangement arranged to act between two components of the first damper element and a slip clutch arrangement arranged to act between two components of the second damper element.