Centrifugal-force pendulum device
A centrifugal-force pendulum device having a pendulum flange and at least two pendulum masses fastened on both sides of the pendulum flange by means of a spacer bolt received in a cut-out of the pendulum flange to form a pendulum mass pair, wherein the pendulum mass pair is guided and pivoted in a limited manner with respect to the pendulum flange by means of at least two rolling elements, and the rolling elements are received and roll in guide tracks in the pendulum masses and in complementarily shaped guide tracks in the pendulum flange, and wherein the spacer bolt is equipped, in its axial region which reaches through the cut-out in the pendulum flange, with damping means for damping contact of the spacer bolt against the cut-out, and compression of the damping means is limited by contact of a rolling element against the guide track which receives the rolling element.
1. A method of damping vibration with a centrifugal pendulum device including a pendulum flange, a first pendulum mass and a second pendulum mass arranged on a first side and a second side of the pendulum flange, respectively, a first spacer bolt and a second spacer bolt fixed to the first and second pendulum masses, respectively, and passing through a first recess and a second recess in the pendulum flange, respectively, a first roller element passing through a first guide track in the flange and accommodated in a second guide track and a third guide track in the first and second pendulum masses, respectively, a second roller element passing through a fourth guide track in the flange and accommodated in a fifth guide track and a sixth guide track in the first and second pendulum masses, respectively, a first damping sheath disposed about the first spacer bolt, and a second damping sheath disposed about the second spacer bolt, the method comprising:
pivoting the first and second pendulum masses with respect to the pendulum flange;
displacing the first spacer bolt and the second spacer bolt in the first and second recesses, respectively;
partially compressing the first and second damping sheaths against the pendulum flange;
rolling the first and second roller elements within the first and fourth guide tracks, respectively;
contacting the flange with the first and second roller elements; and,
preventing, with the contact between the pendulum flange and the first and second roller elements, further compression of the first and second damping sheaths against the pendulum flange.
2. The method of claim 1 , wherein displacing the first and second spacer bolts in the first and second recesses includes:
displacing the first and second spacer bolts closer, in a radial direction, to an axis of rotation for the centrifugal pendulum device; and,
contacting, with the first and second damping sheaths, first and second ends of the first and second recesses, respectively.
3. The method of claim 1 , wherein partially compressing the first and second damping sheaths against the pendulum flange includes less than fully compressing the first and second damping sheaths against the pendulum flange.
4. The method of claim 1 , wherein:
rolling the first roller element within the first guide tracks includes contacting a first end of the first guide track with the first roller element; and,
rolling the second roller element within the fourth guide track includes contacting a second end of the fourth guide track with the second roller element.
5. The method of claim 4 , wherein:
contacting the first end of the first guide track with the first damping sheath includes partially compressing the first damping sheath against the first end; and,
contacting the second end of the fourth guide track with the second damping sheath includes partially compressing the second damping sheath against the second end.
6. A method of damping vibration with a centrifugal pendulum device including a pendulum flange, a first pendulum mass and a second pendulum mass arranged on a first side and a second side of the pendulum flange, respectively, a first spacer bolt and a second spacer bolt fixed to the first and second pendulum masses, respectively, and passing through a first recess and a second recess in the pendulum flange, respectively, a first roller element passing through a first guide track in the flange and accommodated in a second guide track and a third guide track in the first and second pendulum masses, respectively, a second roller element passing through a fourth guide track in the flange and accommodated in a fifth guide track and a sixth guide track in the first and second pendulum masses, respectively, a first damping sheath disposed about the first spacer bolt, and a second damping sheath disposed about the second spacer bolt, the method comprising:
displacing the first spacer bolt and the second spacer bolt in the first and second recesses, respectively, closer, in a radial direction, to an axis of rotation for the centrifugal pendulum device;
contacting the first and second damping sheaths with first and second ends of the first and second recesses, respectively;
partially compressing the first and second damping sheaths against first and second ends of the first and second recesses, respectively;
pivoting the first and second pendulum masses with respect to the pendulum flange;
rolling the first and second roller elements within the first and second guide tracks, respectively;
contacting the pendulum flange with the first and second roller elements; and,
preventing, with the contact between the pendulum flange and the first and second roller elements, full compression of the first and second damping sheaths against the pendulum flange.
7. The method of claim 6 , wherein partially compressing the first and second damping sheaths against the pendulum flange includes less than fully compressing the first and second damping sheaths against the pendulum flange.
8. The method of claim 6 , wherein contacting the pendulum flange with the first and second roller elements includes:
contacting a third end of the first guide track with the first roller element; and,
contacting a fourth end of the fourth guide track with the second roller element.
9. A method of damping vibration with a centrifugal pendulum device including a pendulum flange, a first pendulum mass and a second pendulum mass arranged on a first side and a second side of the pendulum flange, respectively, a first spacer bolt and a second spacer bolt fixed to the first and second pendulum masses, respectively, and passing through a first recess and a second recess in the pendulum flange, respectively, wherein the first recess includes a first inner radial surface and a first outer radial surface and the second recess includes a second inner radial surface and a second outer radial surface, a first roller element passing through a first guide track in the flange and accommodated in a second guide track and a third guide track in the first and second pendulum masses, respectively, a second roller element passing through a fourth guide track in the flange and accommodated in a fifth guide track and a sixth guide track in the first and second pendulum masses, respectively, a first damping sheath disposed about the first spacer bolt, and a second damping sheath disposed about the second spacer bolt, the method comprising:
displacing the first spacer bolt along the first inner and outer radial surfaces and the second spacer bolt along the second inner and outer radial surfaces;
contacting the first and second damping sheaths with first and second ends of the first and second recesses, respectively;
less than fully compressing the first and second damping sheaths against the first and second ends, respectively;
pivoting the first and second pendulum masses with respect to the pendulum flange;
rolling the first and second roller elements within the first and second guide tracks, respectively;
contacting the first roller element with a third end of the first guide track;
contacting the second roller element with a fourth end of the second guide track; and,
preventing, with the contact between the pendulum flange and the first and second roller elements, further compression of the first and second damping sheaths against the pendulum flange.
10. The method of claim 9 , further comprising:
displacing the first and second spacer bolts in the first and second recesses such that the first and second spacer bolts are closer, in a radial direction, to an axis of rotation for the centrifugal pendulum device.