Centrifugal pendulum device

A torsional vibration damper, comprising:

• a damper input piece;
• a damper output piece rotatable to a limited extent relative to the damper input piece due to the action of energy storage elements;
• and,
• a centrifugal pendulum device arranged on the damper input piece and/or on the damper output piece, the centrifugal pendulum device comprising:
• first and second pendulum masses (20) arranged on both axial sides of a pendulum mass support (12) rotatable about an axis of rotation (100) to form a pendulum mass pair (22);
• a fastener (24) passing through a cutout (26) formed in the pendulum mass support (12) to fasten the first and second pendulum masses (20) to each other to form the pendulum mass pair (22);
• and,
• a rolling element (28) arranged to roll in a first recess (30) formed in the pendulum mass support (12) and in a second recess (32) formed in the first pendulum mass (20) to allow the pendulum mass pair (22) to pivot relative to the pendulum mass support (12), the rolling element (28) having a first outer diameter (37) in a first section (34) located within the first recess (30) of the pendulum mass support (12) and a second outer diameter (41) in a second section (42) located within the second recess (32) of the first pendulum mass (20);
• wherein:
• the rolling element (28) has a third section (46):
• axially located between the first and second portions in a direction parallel to the axis of rotation;
• and,
• having a third outer diameter (48);
• and,
• the third outer diameter is smaller than the first outer diameter (37).

A torsional vibration damper, comprising:

• a damper input piece;
• a damper output piece;
• an intermediate damper piece between the damper input piece and the damper output piece and rotatable to a limited extent relative to:
• the damper input piece due to the action of first energy storage elements;
• and the damper output piece due to the action of second energy storage elements and wherein a centrifugal pendulum device is arranged on the intermediate damper piece, the centrifugal pendulum device comprising:
• pendulum masses (20) arranged on both axial sides of a pendulum mass support (12) rotatable about an axis of rotation (100) to form a pendulum mass pair (22);
• a fastener (24) passing through a cutout (26) formed in the pendulum mass support (12) to fasten the pendulum masses (20) to each other to form the pendulum mass pair (22);
• and,
• a rolling element (28):
• arranged to roll in a recess (30, 32) formed in the pendulum mass support (12) and in the pendulum mass (20) to allow the pendulum mass pair (22) to pivot to a limited extent relative to the pendulum mass support (12), the rolling element (28) having a first outer diameter (37) in a first section (34) located within the recess (32) of the pendulum mass support (12) and a second outer diameter (41) in a second section (42) located within the recess (32) of the pendulum mass (20);
• wherein the rolling element (28) has a third section (46):
• axially located between the first and second portions;
• not located in the first or second recess;
• and,
• having a third outer diameter (48), the third diameter being smaller than the first outer diameter (37).