CENTRIFUGAL PENDULUM
A rotational speed-adaptive centrifugal force pendulum for a shaft that can be rotated about an axis, having a pendulum flange on which at least two axially opposite absorber masses that are connected to each other via a spacing element are arranged. The absorber masses and/or the pendulum flange of the centrifugal force pendulum have at least one cutout in which the spacing element of the absorber mass is guided. The cutout is designed as a curve that deviates from a circle or a circular segment starting from a neutral position, by a radius increase of the cutout in one region starting from the neutral position and by a radius reduction of the cutout in the other region starting from the neutral position.
1 . A centrifugal pendulum ( 10 ) for a shaft rotating around an axis, comprising:
a pendulum flange ( 12 ) on which at least two axially opposite absorber masses ( 14 ) connected to each other by way of a spacer element ( 34 , 36 , 38 ) are mounted; and,
at least one cutout ( 32 ) in the absorber masses ( 14 ) and/or the pendulum flange ( 12 ) of the centrifugal pendulum ( 10 ) in which the spacer element of the absorber mass ( 14 ) is guided;
wherein, starting at a neutral position ( 33 ), the cutout ( 32 ) is formed by a circle or a curve deviating from a circular segment by a radius increase of the cutout ( 32 ) in an area ( 39 ) starting from the neutral position ( 33 ) and a radius reduction of the cutout ( 32 ) in another area starting from the neutral position ( 33 ).
2 . The centrifugal pendulum recited in claim 1 , wherein the two absorber masses ( 14 ) and the pendulum flange ( 12 ) of the centrifugal pendulum ( 10 ) each has a cutout ( 32 ), wherein the cutout ( 32 ) of the pendulum flange ( 12 ) is arranged with respect to the cutout ( 32 ) of the absorber mass ( 14 ) in such a way that the area ( 39 ) of the cutout of the pendulum flange ( 12 ) which has a radius increase starting from the neutral position ( 33 ) lies opposite the area ( 40 ) of the cutout ( 32 ) of the absorber mass ( 14 ) that has a radius reduction starting from the neutral position ( 33 ).
3 . The centrifugal pendulum recited in claim 2 , wherein the two absorber masses ( 14 ) and the pendulum flange ( 12 ) of the centrifugal pendulum ( 10 ) each have two cutouts ( 32 ), whereby especially the two cutouts ( 32 ) of the pendulum flange ( 12 ) are arranged mirror-inverted with respect to each other and the two cutouts ( 32 ) of the respective absorber mass ( 14 ) are arranged mirror-inverted with respect to each other.
4 . The centrifugal pendulum recited in claim 1 , wherein the pendulum flange ( 12 ) has two cutouts ( 32 ), whereby a respective motion path ( 28 , 30 ) of two points ( 20 , 22 ) of the absorber mass ( 14 ) in the cutouts ( 32 ) can be determined using the following equations:
x Ri =0.5 B (cos β i −1)+l i sin φ i +( H−Y s )sin β i
x Ri =0.5 B (l−cos β i )+l i sin φ i +( H−Y s )sin β i
y Ri =0.5 B sin β i −L i −l i cos φ i −( H−Y s )cos β i +H
y Ri =0.5B sin β i +L i +l i cos φ i +(H−Y s )cos β i −H, wherein φ 1 is the oscillation angle of the pendulum, β 1 is the turning angle of the mass and/or absorber mass (mass element); Y s is the distance of mass center of gravity (mass element); L 1 is the distance of the oscillation center; l 1 is the oscillation length of the mass and/or absorber mass; H is the distance of the first or second point of the absorber mass from the oscillation center; and, B is the distance of the first and second point from each other.
5 . The centrifugal pendulum recited in claim 1 , wherein the spacer element ( 34 , 38 ) is a pin element ( 34 ), a roller ( 38 ) or a stepped roller ( 38 ).
6 . The centrifugal pendulum recited in claim 1 , wherein the spacer element ( 34 , 38 ) has an additional bearing ( 36 ).
7 . The centrifugal pendulum recited in claim 1 , wherein the cutout ( 32 ) is designed in such a way that the absorber mass ( 14 ) can execute a translational and a rotary motion, whereby the at least one cutout ( 32 ) especially has a non-symmetrical curve or path curve.
8 . The centrifugal pendulum recited in claim 1 , wherein a turning angle (β) of the absorber mass ( 14 ) and/or a distance (L) of an oscillation center ( 24 ) of the centrifugal pendulum ( 10 ) and/or an oscillation length ( 1 ) of the absorber mass ( 14 ) depend on an oscillation angle (φ) of the centrifugal pendulum ( 10 ).
9 . The centrifugal pendulum recited in claim 1 , wherein a diameter of the spacer element ( 34 , 36 , 38 ) is smaller than a width of the cutout ( 32 ) in which the spacer element ( 34 , 36 , 38 ) is guided.
10 . A drive train, especially of a vehicle, which has a centrifugal pendulum ( 10 ) as recited in claim 1 .
11 . A drive train, especially of a vehicle, which has a centrifugal pendulum ( 10 ) as recited in claim 2 .
12 . A drive train, especially of a vehicle, which has a centrifugal pendulum ( 10 ) as recited in claim 3 .
13 . A drive train, especially of a vehicle, which has a centrifugal pendulum ( 10 ) as recited in claim 4 .
14 . A drive train, especially of a vehicle, which has a centrifugal pendulum ( 10 ) as recited in claim 5 .
15 . A drive train, especially of a vehicle, which has a centrifugal pendulum ( 10 ) as recited in claim 6 .
16 . A drive train, especially of a vehicle, which has a centrifugal pendulum ( 10 ) as recited in claim 7 .
17 . A drive train, especially of a vehicle, which has a centrifugal pendulum ( 10 ) as recited in claim 8 .
18 . A drive train, especially of a vehicle, which has a centrifugal pendulum ( 10 ) as recited in claim 9 .