Centrifugal pendulum device

1. A centrifugal pendulum device ( 10 ), 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 outer diameter and the second outer diameter and having a third outer diameter ( 48 ), the third diameter being smaller than the first outer diameter ( 37 ).

2. The centrifugal pendulum device ( 10 ) recited in claim 1 , wherein the first outer diameter ( 37 ) is greater than the second outer diameter ( 41 ).

3. The centrifugal pendulum device ( 10 ) recited in claim 1 , wherein a spacer element ( 52 ) for limiting an axial minimum distance between the pendulum mass support ( 12 ) and the pendulum mass ( 20 ) is formed on a pendulum mass ( 20 ) side face ( 50 ) axially facing the pendulum mass support ( 12 ) to limit an axial minimum distance between the pendulum mass support ( 12 ) and the pendulum mass ( 20 ).

4. The centrifugal pendulum device ( 10 ) recited in claim 3 , wherein the spacer element ( 52 ) is a pin.

5. The centrifugal pendulum device ( 10 ) recited in claim 3 , wherein the spacer element ( 52 ) is formed integrally with the pendulum mass ( 20 ).

6. The centrifugal pendulum device ( 10 ) recited in claim 3 , wherein the spacer element ( 52 ) is fixed to the pendulum mass ( 20 ) as a separate component.

7. The centrifugal pendulum device ( 10 ) recited in claim 6 , wherein the spacer element ( 52 ) and the pendulum mass ( 20 ) are riveted or welded or glued or soldered or screwed or splined together.

8. 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 ).

9. 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 ).