A damper system which is supportable rotatably around an axis of rotation, having a first absorber device and a second absorber device. The first absorber device includes at least one first pendulum mass, a first coupling device and a first flange part. The first pendulum mass is coupled with the first flange part by means of the first coupling device. The first coupling device is designed to guide the first pendulum mass along a first oscillation path. The second absorber device is offset radially from the first absorber device. The second absorber device includes an absorber element. The absorber element is coupled with the first flange part.

The present invention relates to a dynamic damper provided with a planetary dear device and damper springs and aims to obtain an increased adjustable range of gear ratio for obtaining a desired reduction of rotating fluctuation and to reduce a size in a radial direction. A plurality of planetary gears 34 are provided, each forms a stepped shape (Ravigneau type planetary gear device) and is constructed by a small diameter pinion 42 and a large diameter pinion 44 juxtaposed in an axial direction so as to be rotated integrally. Rotating elements, which are selectively and desirably arranged to mesh with the small diameter pinion 42 and the large diameter pinion 44, are large diameter and small diameter ring gears and large diameter and small diameter sun gears. In addition to a carrier connecting the plurality of stepped shaped planetary gears 34, two rotating elements are selected from the large diameter and small diameter ring gears and the large diameter and small diameter sun gears. Among the selected elements, two selected rotating elements, for example, the large diameter sun gear and the carrier are assigned to the inlet and the outlet elements, respectively and the remaining small sun gear 40 is assigned to the mass element.

A vibration reduction device for reducing a torsional vibration from an engine includes an input rotary part, an output rotary part, a damper part, a dynamic vibration absorbing device, and a torque limiting part. Torsional vibration is input to the input rotary part. The output rotary part is disposed to be relatively rotatable with respect to the input rotary part. The damper part is disposed between the input rotary part and the output rotary part and attenuates the torsional vibration input to the input rotary part. The dynamic vibration absorbing device absorbs the torsional vibration output from the damper part. The torque limiting part limits transmission of torque between the input rotary part and the output rotary part.

A damper device that includes an input to which torque from an engine is transmitted, a first intermediate element, a second intermediate element, an output, a first elastic body that transmits the torque between the input and the first intermediate element, a second elastic body that transmits the torque between the first intermediate element and the output, a third elastic body that transmits the torque between the input and the second intermediate element, and a fourth elastic body that transmits the torque between the second intermediate element and the output.

A connection arrangement serves to connect a plurality of damper mass elements by connection elements in order to form a damper mass. The connection elements have in each instance a central axis in axial direction and are formed in each instance by a shaft with shaft ends at both sides, and the shaft ends and the shaft are enclosed in each instance by inner walls of passages of the damper mass elements, which inner walls extend around the central axis. At least a portion of the shaft ends has, by a hole face, a connection to the respective associated inner wall of the corresponding passage of the respective damper mass element.

A rotating inertia mass damper of a damper device comprises a planetary gear including a driven member that has external teeth and that serves as a sun gear; a plurality of pinion gears; first and second input plate members that are configured to support the plurality of pinion gears in a rotatable manner and that serve as a carrier; and a ring gear that is engaged with the plurality of pinion gears and that serves as a mass body. The ring gear has two gear main bodies that are arranged along an axial direction of the planetary gear and that are coupled with each other. Internal teeth of the two gear main bodies are shifted to each other in a circumferential direction of the gear main bodies.

A torsional vibration damping system (7) for a motor vehicle drive train (1) has an input side (14) and an output side (26) connected via a damper unit (27). The damper unit (27) includes two torsional vibration dampers (17, 18) and a vibration damper (19). The damper unit (27) are configured for placement in a wet space (30) of a housing (6).

A torque fluctuation inhibiting device includes a first rotating body, a second rotating body, a centrifugal element, a support portion, and a displacement inhibiting mechanism. Torque is input to the first rotating body. The centrifugal element is subject to centrifugal force due to rotation of the first rotating body and moves in a direction different from a direction in which the centrifugal force acts. The support portion is provided in the first rotating body or the second rotating body and moveably guides the centrifugal element in the direction different from the direction in which the centrifugal force acts on the centrifugal element. The displacement inhibiting mechanism generates circumferential force which reduces a relative displacement of the first rotating body and the second rotating body when the centrifugal element moves in the direction different from the direction in which the centrifugal force acts on the centrifugal element.

Provided is torsion damper for a vehicle including an output side-flywheel coupled to an output shaft of a driving unit in an axial direction, a first drive plate disposed to be relatively rotatable in an axial direction of the output side-flywheel, a second drive plate disposed to be relatively rotatable in an axial direction of the first drive plate, an input shaft of a transmission being coupled thereto in the axial direction, a first damper member installed between the output side-flywheel and the first drive plate and configured to absorb vibration and impact generated in a rotation direction thereof, and a second damper member installed between the first drive plate and the second drive plate and configured to absorb vibration and impact generated in a rotation direction thereof.

A damper device including an input element to which a torque from an engine is transmitted; an output element; an elastic body to transmit torque between the input element and the output element; and rotary inertia mass damper having a mass body that rotates in accordance with a relative rotation of the input element and the output element. The output element is coupled to a rotor of an electric motor, which is coupled to an input shaft of a transmission. The rotary inertia mass damper includes a planetary gear mechanism having a carrier that supports pinion gears, the carrier is a part of the input element, one of the sun gear and the ring gear is a part of the output element, and the other of the sun gear and the ring gear functions as the mass body.