Centrifugal pendulum

Patent metadata

Field	Value
Publication number	US-9915317-B2
Application number	US-201514631967-A
Country	US
Kind code	B2
Filing date	Feb 26, 2015
Priority date	Aug 27, 2012
Publication date	Mar 13, 2018
Grant date	Mar 13, 2018

Abstract

A centrifugal pendulum, in particular for arrangement on a drive shaft of an internal combustion engine, has a drive ring which can be mounted on a drive shaft for rotation therewith, and a synchronizing ring which is freely rotatable relative to the drive ring. The axis of rotation of the drive ring and the axis of rotation of the synchronizing ring are identical. The centrifugal pendulum further includes at least one pendulum body which is mounted movably on the drive ring. The pendulum body is kinematically coupled via at least one coupling element to the synchronizing ring such that, in the event of a rotation of the synchronizing ring relative to the drive ring in a first direction, the coupling element deflects the pendulum body toward the axis of rotation.

First claim

What is claimed is:

1. A centrifugal pendulum, comprising:
a drive ring;
a synchronizing ring; and
a plurality of pendulum bodies that are mounted on the drive ring, wherein
each pendulum body: i) at an edge thereof, defines an opening into which a bearing is inserted, ii) has an elongated wedge shape that defines therein a wedge-shaped cutout portion, iii) defines a pendulum contour within which a coupling body that couples each pendulum body to the synchronizing ring is free to move, and iv) has a center of mass that is located between the wedge-shaped cutout portion and the pendulum contour.

2. The centrifugal pendulum according to claim 1 , wherein the centrifugal pendulum is configured for arrangement on a drive shaft of an internal combustion engine.

3. The centrifugal pendulum according to claim 1 , wherein an axis of rotation of the drive ring and an axis of rotation of the synchronizing ring are identical.

4. The centrifugal pendulum according to claim 1 , wherein the plurality of pendulum bodies are mounted rotatably on the drive ring, and the coupling body permits only a limited rotation of each pendulum body.

5. The centrifugal pendulum according to claim 1 , wherein:
the plurality of pendulum bodies lie between two rigidly interconnected discs of the synchronizing ring; and
the coupling body extends from a first contour on a first one of the two disks through the pendulum contour into a second contour of a second one of the two disks, said second contour lying exactly opposite to the first contour.

6. The centrifugal pendulum according to claim 1 , wherein:
the synchronizing ring projects between two rigidly interconnected halves of the plurality of pendulum bodies; and
the coupling body extends from a first contour of a first pendulum body half through a contour of the synchronizing ring into a second contour of a second pendulum body half, said second contour lying exactly opposite to the first contour.

7. The centrifugal pendulum according to claim 1 , wherein the plurality of pendulum bodies are mounted on the drive ring so as to be displaceable in a translatory manner.

8. The centrifugal pendulum according to claim 7 , wherein the translatory displacement is in a radial direction.

9. The centrifugal pendulum according to claim 1 , wherein:
the coupling element is a thread or a band with which the plurality of pendulum bodies are connected to the synchronizing ring, and
the synchronizing ring has an outer circumference with a contour against which the thread or the band nestles during a rotation between drive ring and synchronizing ring.

10. The centrifugal pendulum according to claim 1 , wherein the coupling element is an articulation mechanism via which the pendulum bodies are connected to the synchronizing ring.

11. The centrifugal pendulum according to claim 1 , wherein the coupling element is a bolt.

12. The centrifugal pendulum according to claim 1 , wherein the plurality of pendulum bodies are coupled to an outer section of the synchronizing ring by being hooked into a roller which can roll on a contour of the synchronizing ring.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Ulbrich Heinz
• Mayet Johannes

Classifications

• F16F15/145

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

• F16F15/31 Primary

  characterised by means for varying the moment of inertia · CPC title

• Y10T74/2128

  Damping using swinging masses, e.g., pendulum type, etc. · CPC title

• F16F15/1471 Primary

  with a kinematic mechanism, i.e. linkages, levers · CPC title