Patent ID: 6106430
Filing Date: 2000-08-22
Classification: F16F,Y10T

Abstract:
A rotary vibration damping device for damping rotary vibrations in a drive train through which output torque of an internal combustion engine having a crank shaft is transmitted in a drive power flow direction driving wheels of a motor vehicle, the rotary vibration damping device comprisinga first inertial mass arrangement that is connected to the crank shaft of the internal combustion engine for rotation around a rotational axis;a second inertial mass arrangement;spring means for connecting the second inertial mass arrangement to the first inertial mass arrangement for common rotation about the rotational axis and for relative rotation with respect to the first inertial mass arrangement;at least a third inertial mass arrangement that is connected in the drive train before the spring means in the drive power flow direction for rotation about the rotational axis, the at least a third inertial mass arrangement being configured to be disconnectable from the drive train, with respect to rotary drive, when a predetermined operating state is attained, the at least a third inertial mass arrangement includes a first inertial mass part connectable to the first inertial mass arrangement, a second inertial mass part connected to the first inertial mass part, and vibration damping means arranged between the second inertial mass part and the first inertial mass part; andconnection means for connecting and disconnecting the third inertial mass arrangement to and from the drive train, the connection means being switchable between a connecting position and a disconnecting position as a function of the operating state, the connection means including a plurality of connection elements that are radially moveable relative to the rotational axis and biased into the connecting position, the connection elements being arranged at a substantially regular distance from each other in a circumferential direction, each connection element comprising a connecting ring segment with a maximum circumferential extension of 180.degree..