Centrifugal pendulum and torque transfer device having such a centrifugal pendulum

Patent metadata

Field	Value
Publication number	US-2016348779-A1
Application number	US-201515117413-A
Country	US
Kind code	A1
Filing date	Jan 29, 2015
Priority date	Feb 12, 2014
Publication date	Dec 1, 2016
Grant date	—

Abstract

A centrifugal pendulum for a drivetrain of a motor vehicle, which is mounted rotatably around an axis of rotation, having a pendulum mass, a slotted guide and a pendulum flange, wherein the pendulum mass is coupled to the pendulum flange via the slotted guide, wherein the slotted guide is designed to position the pendulum mass movably in an oscillating motion along a curved oscillation path between a rest position and at least one deflected position that differs from the rest position, wherein the rest position and the deflected position have a common curvature reference point, wherein the rest position is at a first distance from the curvature reference point and the deflected position is at a second distance from the curvature reference point, wherein the first distance is different from the second distance.

First claim

What is claimed is:

1 - 10 . (canceled)

11 . A centrifugal pendulum for a drivetrain of a motor vehicle, the centrifugal pendulum mountable rotatably around an axis of rotation, the centrifical pendulum comprising
a pendulum flange, a slotted guide, and a pendulum mass, wherein the pendulum mass is connected to the pendulum flange via the slotted guide; wherein the slotted guide is configured to position the pendulum mass movably in an oscillating motion along a curved oscillation path between a rest position and at least one deflected position that differs from the rest position; wherein the rest position and the deflected position have a common curvature reference point; wherein the rest position is at a first distance from the curvature reference point and the deflected position is at a second distance from the curvature reference point; and wherein the first distance is different from the second distance.

12 . A centrifugal pendulum according to claim 11 , wherein the second distance is greater than the first distance.

13 . A centrifugal pendulum according to claim 11 , wherein the second distance is smaller than the first distance.

14 . A centrifugal pendulum according to claim 11 , wherein the ratio of the second distance to the first distance has a value that falls within at least one of the following ranges: 0.8 to 0.99; 0.8 to 0.98; 0.8 to 0.95; 0.9 to 0.99; 0.9 to 0.98; 0.9 to 0.95; 0.95 to 0.98; 0.95 to 0.99; 1.01 to 1.2; 1.02 to 1.2; 1.05 to 1.2; 1.01 to 1.1; 1.02 to 1.1; 1.05 to 1.1; 1.01 to 1.05; 1.02 to 1.05.

15 . A centrifugal pendulum according to claim 11 , wherein the oscillation path is at least partially elliptical and/or parabolic and/or hyperbolic and/or according to a function of the nth order where n ε N>2.

16 . A centrifugal pendulum according to claim 11 ,
wherein the slotted guide has a first cutout with a first cutout contour in the pendulum flange, and at least one second cutout with a second cutout contour in the pendulum mass; wherein extending through the first cutout and the second cutout is a guide element which rests against the first cutout contour and against the second cutout contour when the pendulum mass is oscillating, to determine the oscillation path.

17 . A centrifugal pendulum according to claim 11 , wherein the second distance is at least 0.1 mm greater than the first distance, or wherein the second distance is at least 0.1 mm smaller than the first distance.

18 . A centrifugal pendulum according to claim 11 , wherein the second distance is at least 0.3 mm greater than the first distance, or wherein the second distance is at least 0.3 mm smaller than the first distance.

19 . A centrifugal pendulum according to claim 11 , wherein the oscillation path is axially symmetric or asymmetric in reference to a plane of symmetry running between the rest position and the axis of rotation.

20 . A centrifugal pendulum according to claim 11 ,
wherein the oscillation path has in a first circumferential direction a first oscillation path section with the deflected position, and in a second circumferential direction opposite the first circumferential direction has a second oscillation path section with another deflected position; wherein the other deflected position is at a third distance from the curvature reference point; and wherein the third distance is different from the first distance and/or second distance.

21 . A torque transfer device for transferring torque between an input side and an output side, the torque transfer device comprising:
a centrifugal pendulum according to claim 11 ; a hydrodynamic converter which is designed to transfer a torque between the input side and the output side, the hydrodynamic converter being in a first torque transfer path; a clutch which is configured to provide a torque transfer selectively between the input side and the output side, the clutch being in a second transfer path; and wherein the hydrodynamic converter includes at least one turbine wheel, and wherein the centrifugal pendulum is positioned on the turbine wheel.

22 . A torque transfer device according to claim 21 , wherein the centrifugal pendulum has a first order of matching and a second order of matching, where the first order of matching is different from the second order of matching.

Assignees

• Schaeffler Technologies Ag

Inventors

• Voegtle Benjamin
• Krause Thorsten

Classifications

• F16H2045/0263

  the damper comprising a pendulum · CPC title

• F16F15/145 Primary

  Masses mounted with play with respect to driving means thus enabling free movement over a limited range · CPC title

• F16H45/02 Primary

  with mechanical clutches for bridging a fluid gearing of the hydrokinetic type (control of torque converter lock-up clutches F16H61/14) · CPC title

• F16H47/06

  the fluid gearing being of the hydrokinetic type · CPC title

• F16F15/14 Primary

  using masses freely rotating with the system, {i.e. uninvolved in transmitting driveline torque, e.g. rotative dynamic dampers (compensation of inertia forces F16F15/22; weights for balancing rotating bodies F16F15/32)} · CPC title