DE102009052055A1 - Centrifugal force pendulum device for vibration damping in dual mass flywheel of drive train of motor vehicle, has pendulum masses of two orders suspended at front side and rear side of rotating support disk - Google Patents

Abstract

The device (1) has pendulum masses (7A, 7B) of two orders suspended at a front side and a rear side of a rotating support disk (3). The pendulum masses accomplish relative movement to the carrier disk along a predetermined swing path. The pendulum masses of equal order have an identical swing path. The pendulum masses are arranged to each other around 90 degrees in circumferential direction. The carrier disk is arranged as a flange for a dual mass flywheel that taps torque from a bow spring and transfers to a secondary flywheel. An independent claim is also included for a dual mass flywheel comprising a centrifugal force pendulum device.

Description

The The present invention relates to a centrifugal pendulum device for vibration damping in the drive train of a motor vehicle. The present invention further relates to a dual mass flywheel and the use of such a centrifugal pendulum device.

By the periodic combustion processes of a reciprocating engine in particular in the train operating vibrations in the following Powertrain of the motor vehicle excited. In the sense of the patent application The term motor vehicles also includes trucks, agricultural machinery and the like. Such vibrations are in particular speed and / or Rotational load vibrations. The resulting noise and vibrations lead to subjectively perceptible losses on noise and ride comfort. For damping such Vibrations in the drive train of a motor vehicle are from the Prior art torsional vibration damper known, such. B. dual mass flywheels. By combining a such torsional vibration damper with a dynamic vibration absorber, such as in particular a centrifugal pendulum device, the damping effect be significantly improved.

A Such centrifugal pendulum device comprises at least one pendulum mass, preferably several pendulum masses, for example. By means of rollers or Like. Hung from a rotating carrier disc are and along given pendulum tracks a relative movement can run to this carrier disk, in this case a variable distance from the axis of rotation of the carrier disk take. Such pendulum mass is also called centrifugal pendulum or bifilar pendulum mass. As a result of the vibrations in the powertrain, the pendulum masses become pendulum or oscillate stimulated, with their focal points permanent and time-shifted to change the vibrations in the drive train, which means mechanical feedback damping the vibrations causes in the drive train of the motor vehicle. The damping effect can by appropriate vote of the pendulum masses and / or their Pendulum lifts are adjusted.

The reduction of vibrations in waves by means of pendulum masses is, for example, in the patent DE 597091 described. Centrifugal pendulum devices are, for example, from the patents DE 10 2006 028 556 A1 and DE 10 2006 028 552 A1 the same applicant.

One A common problem in the prior art is excitation with low-frequency vibrations in train operation, in particular during Step transition. Currently these are low frequency vibrations by modifying the transfer characteristics of the dual mass flywheel intercepted, for example by moving the transition point a multi-level characteristic. However, this leads partially to fundamental changes in the characteristics of the dual-mass flywheel, which, for example, its transmission behavior in Start or start can worsen. Alternatively exists the possibility to adapt the motor characteristics. Such However, modifications of the motor characteristics can only be made by be made to the engine manufacturers.

A The object of the invention is a universal centrifugal pendulum device to provide with an improved damping effect, in particular for damping low-frequency vibrations suitable is.

These Task is solved by a centrifugal pendulum device with the features of claim 1. Preferred and advantageous Further developments are the subject of the dependent claims. A dual mass flywheel with such a centrifugal pendulum device is the subject of a sibling claim. Preferred uses This centrifugal pendulum device are the subject of further sibling Claims.

According to the invention a centrifugal pendulum device for arrangement in the drive train a motor vehicle proposed comprising at least one pendulum mass, suspended from a rotating carrier disc is arranged and along at least one predetermined pendulum track a Perform relative movement to the carrier disk can, wherein on the carrier disc at least one pendulum mass a first order and at least one pendulum mass of another Order hung or arranged.

Prefers becomes an optimum between pendulum masses of different orders certainly. Such an optimum is used, for example, to avoid an imbalance.

Under the order of a pendulum mass can in the context of the invention a Excitation order to be understood. The excitation order is here defined as the number of excitation cycles per revolution of the crankshaft.

n

der Abstimmungsordnung;

λ_P

der Eigenfrequenz der Pendelmasse, und

φ .

der Drehgeschwindigkeit der Trägerscheibe.

In the context of the invention, the order of a pendulum mass can preferably also be understood as meaning a voting order. The order of coordination of a pendulum mass means the ratio between its natural frequency and the speed of rotation of the body on which this is suspended or mounted, ie the rotating carrier disc. This can be described mathematically or kinematically-physically as follows:

n

the voting order;

λ _P

the natural frequency of the pendulum mass, and

φ.

the rotational speed of the carrier disk.

Of the Value for the voting order can be set with the value for the excitation order according to the above statements correlate.

Under the order of a pendulum mass can also be understood in particular a geometrically fixed order on the pendulum geometry, such as. In the DE 10 2006 028 552 A1 described.

The centrifugal pendulum device according to the invention has the advantage that a vibration damping at different Frequencies or in different frequency ranges can be done. The inventive combination of centrifugal pendulum different orders is for both damping low-frequency vibrations as well as for damping high-frequency oscillations suitable. As a result, the damping effect Overall, significantly improved, especially in low-frequency Areas. This is especially in combination with a torsional vibration damper or a dual-mass flywheel, since now no or only a slight adjustment of the transfer characteristics the dual mass flywheel is required and thus its transmission behavior largely unaffected.

The Carrier disk of the centrifugal pendulum device according to the invention with respect to its end face or end face preferred in about an annular contour. Hereby are defines a radial direction and a circumferential direction. As a pendulum track geometry for a pendulum mass is a circle pendulum or a Epicycloid pendulum track preferred. In particular, is also a path correction intended. Circular aerial tramways can be preferred in small Oscillation angles of a pendulum mass are used while Epicycloid pendulum lifts preferred for larger ones Oscillation angles can be used. Further, too asymmetric aerial tramways possible.

According to one preferred development is provided that several pendulum masses of the same order are hung on the carrier disc, where the pendulum masses of a same order an identical aerial tramway or have identical aerial tramways.

According to one preferred development is provided that on the carrier disk at least one pendulum mass of a first order and at least a pendulum mass of a second order are suspended. The proposed centrifugal pendulum device thus receives two orders, which are also called main order and as secondary order or Niederordnung can be designated.

A Main order can be determined, for example, via the excitation order be, according to the above. That means z. B. that the main order of a pendulum mass for a common four-cylinder internal combustion engine a 2nd-order order is made up of four ignitions per two revolutions of the crankshaft results. An adjunct is In this case, an order of higher degree, for example 4-th, is preferred Grades whose amplitudes can be relatively large and therefore noticeable to the driver.

According to one preferred development is provided that a variety of Pendulum masses of first order and a variety of pendulum masses second Order are provided on the carrier disc in one Circumference are suspended alternately. Prefers are these pendulum masses along a substantially same perimeter, d. H. with the same radial distance from the axis of rotation arranged.

According to one preferred development is provided that in each case two pendulum masses the same order opposite to the carrier disc are arranged. With opposite here is regarding the Circumferential direction meant an angular offset of 180 ° to each other. Preferably, it is provided that the opposite or pendulum pendulum masses and especially their Pendulum tracks are identical.

According to one preferred development is provided that at least at one Front side of the carrier disc two pendulum masses of the first Order and two pendulums of the second order hung are.

According to one preferred development thereof is provided that the two Pendulum masses of the same order on the same front side of the Support disk are suspended opposite. With opposite here again is an angular offset meant by 180 ° to each other.

According to a preferred embodiment, it is provided that the pendulum masses of the first Ord tion to the pendulum masses of the second order in a circumferential direction offset by 90 ° to each other. Again, it is preferably provided that these pendulum masses are arranged along a substantially same circumferential line.

According to one preferred development is provided that the pendulum masses an order in pairs and mirror-symmetrical at the front and the back of the carrier disc suspended are.

According to one preferred development is provided that the carrier disk is also prepared as a flange for a dual-mass flywheel, which picks up the torque from the bow springs and on a Secondary flywheel transmits. hereby can the transmission behavior of the dual mass flywheel be significantly improved.

The Invention further relates to a torsional vibration damper, in particular a dual-mass flywheel, for arrangement in the drive train a motor vehicle, comprising a primary flywheel and a secondary flywheel, wherein a torque transmission from the primary flywheel to the secondary flywheel by means of of vibration-damping bow springs and a non-rotatable flange connected to the secondary flywheel, and wherein the flange as a carrier disk for a Centrifugal pendulum device according to one of the preceding Claims trained or prepared.

Of the Flange cooperates with the bow springs of the dual mass flywheel and preferably engages by means of radially projecting wings at the bow spring ends.

Prefers is the primary flywheel as a primary flywheel or primary flywheel and the secondary flywheel as secondary flywheel or secondary flywheel educated.

Prefers is the use of a centrifugal pendulum device according to the invention for vibration damping in the drive train of a motor vehicle.

Prefers is also the use of an inventive Centrifugal pendulum device in a dual mass flywheel.

in the Below is an embodiment of the invention based explained the accompanying figure. The figure shows the embodiment the centrifugal pendulum device in the axial plan view.

The centrifugal pendulum device is a total of 1 designated. The axis of rotation extends perpendicular to the image plane and is with 2 designated. The centrifugal pendulum device 1 includes a carrier disk 3 , which has approximately an annular contour in the illustrated axial plan view. The carrier disk 3 has on its outer circumference two opposite lobes or wings 4 on, which can interact with the bow springs of a not shown two mass flywheel. Accordingly, the carrier disk 3 also provided as a flange in a dual mass flywheel. About the holes 5 can be made a rotationally fixed connection to a secondary flywheel or secondary flywheel. The centrifugal pendulum device 1 is thus provided for the secondary-side arrangement.

At the carrier disk 3 are in the range of the outer circumference four pendulum masses 7A and 7B arranged. The pendulum masses 7A and 7B are by means of rollers 8th and corresponding cam tracks or slots 9 in the pendulum masses 7A and 76 , as well as curved tracks 10 in the carrier disk 3 , relatively movable to the carrier disk 3 suspended and can thus swing or commute. Due to the caster-curved track guides are the pendulum masses 7A and 7B Trajectories or pendulum tracks and swing angle given. Instead of such caster-curved track guides, other guides may be provided.

According to the invention, the pendulum masses 7A and 7B a different order. The two pendulum masses 7A belong to a first order or main order and the two pendulum masses 7B belong to a second order or secondary order or subordination. However, this assignment can also be reversed. This can advantageously the damping effect of the centrifugal pendulum device 1 be significantly improved, preferably in the low-frequency vibration range and in particular with respect to different vibration frequencies.

The pendulum masses 7A and 7B are on the same front side of the carrier disk 3 arranged or suspended. The two pendulum masses 7A the first order are opposite, ie offset in the circumferential direction by 180 ° to each other. The same applies to the two pendulum masses 7B the second order. The respective opposite or opposing pendulum masses 7A and their pendulum tracks are identical, ie, they have the same mass and the same geometry. The same applies to the pendulum masses 7B , Between the individual pendulum masses 7A and 7B is given in the circumferential direction in each case an angular distance or angular offset of approximately 90 °.

1

Fliehkraftpendeieinrichtung

2

axis of rotation

3

Carrier disk; flange

4

Wing, Cloth (on the carrier disk)

5

Hole (s)

7A

pendulum mass (1st order / main order)

7B

pendulum mass (2nd order / lower order)

8th

castors (including caster bolts); support role

9

cam track (in pendulum mass)

10

cam track (in carrier disk)

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 597091 [0004]
• DE 102006028556 A1 [0004]
• - DE 102006028552 A1 [0004, 0013]

Claims (12)

Centrifugal pendulum device ( 1 ) for arrangement in the drive train of a motor vehicle, comprising at least one pendulum mass which is mounted on a rotating carrier disc ( 3 ) is suspended and along at least one predetermined pendulum track a relative movement to the carrier disc ( 3 ), characterized in that on the carrier disc ( 3 ) at least one pendulum mass ( 7A ) of a first order and at least one pendulum mass of another order are suspended. Centrifugal pendulum device ( 1 ) according to claim 1, characterized in that a plurality of pendulum masses of a same order are suspended on the carrier disk, wherein the pendulum masses of a same order have an identical pendulum track. Centrifugal pendulum device ( 1 ) according to claim 1 or 2, characterized in that on the carrier disc ( 3 ) at least one pendulum mass ( 7A ) of a first order and at least one pendulum mass ( 7B ) is suspended in a second order. Centrifugal pendulum device ( 1 ) according to claim 3, characterized in that a plurality of pendulum masses ( 7A ) first order and a variety of pendulum masses ( 7B ) second order provided on the carrier disc ( 3 ) are alternately suspended in a circumferential direction. Centrifugal pendulum device ( 1 ) according to claim 4, characterized in that in each case two pendulum masses ( 7A . 7B ) of the same order opposite to the carrier disc ( 3 ) are arranged. Centrifugal pendulum device ( 1 ) according to claim 4 or 5, characterized in that at least at one end face of the carrier disc ( 3 ) two pendulum masses ( 7A ) of the first order and two pendulum masses ( 7B ) of the second order are suspended. Centrifugal pendulum device ( 1 ) according to claim 6, characterized in that the two pendulum masses ( 7A . 7B ) of the same order on the same end face of the carrier disk ( 3 ) are suspended opposite each other. Centrifugal pendulum device ( 1 ) according to one of claims 4 to 7, characterized in that the pendulum masses ( 7A ) of the first order to the pendulum masses ( 7B ) of the second order in a circumferential direction are offset by 90 ° to each other. Centrifugal pendulum device ( 1 ) according to one of claims 3 to 8, characterized in that the pendulum masses ( 7A . 7B ) of an order in pairs and mirror-symmetrically on the front and the rear side of the carrier disc ( 3 ) are suspended. 10 centrifugal pendulum device ( 1 ) according to one of the preceding claims, characterized in that the carrier disc ( 3 ) is also prepared as a flange for a dual mass flywheel, which picks up the torque from the bow springs and transmits to a secondary flywheel. A dual mass flywheel for arrangement in the drive train of a motor vehicle, comprising a primary flywheel and a secondary flywheel, wherein a torque transmission from the primary flywheel to the secondary flywheel by means of vibration damping bow springs and a non-rotatably connected to the secondary flywheel flange, characterized in that the flange as a carrier disk for a centrifugal pendulum device ( 1 ) according to one of the preceding claims. Use of a centrifugal pendulum device ( 1 ) according to one of claims 1 to 10 for vibration damping in the drive train of a motor vehicle. Use of a centrifugal pendulum device ( 1 ) according to one of claims 1 to 10 in a dual mass flywheel.