Torsional vibration damper with a closure for openings for filling the grease chamber

A torsional vibration damper, comprising:

• a first, drive-side flywheel mass;
• a second flywheel mass rotatable relative to the first flywheel mass about a rotational axis;
• a torsional damping device that connects the second flywheel mass to the first flywheel mass, at least one of the flywheel masses having a grease chamber configured to at least partially accommodate the torsional damping device, the at least one flywheel mass having at least one through-opening that axially penetrates a wall of the at least one flywheel mass to permit filling of the grease chamber with viscous medium;
• a closure member formed as a cover that is movable in an axial direction relative to the opening between a sealing position in which the cover seals the opening relative to the grease chamber and open position in which the cover is removed from the opening to permit filling of the grease chamber;
• and
• a connection piece guidable through the opening in the flywheel mass so as to move the cover from the opening for fling the grease chamber with the viscous medium.