DE102018117448A1 - Speed-adaptive damper device - Google Patents

Abstract

The invention relates to a speed-adaptive damper device, in particular for a drive train of a motor vehicle, with a support part rotatably arranged around an axis of rotation and with pendulum masses (1) arranged distributed over the circumference around the axis of rotation, which pendulum bearings along a predetermined pendulum track in the centrifugal field of the centrifugal force rotating around the axis of rotation The damper device is pivotally suspended on the carrier part, the self-aligning bearings each consisting of raceways (3) arranged on recesses (2) of the pendulum masses (1) and the carrier part and a pendulum roller (axially overlapping the recesses (2) and rolling on the raceways (3)) 5) are formed. In order to make better use of the space available for the pendulum masses (1), the recesses (2) are provided with openings (4) in the circumferential direction on one side.

Description

The invention relates to a speed-adaptive damper device, in particular for a drive train of a motor vehicle with a support part rotatably arranged about an axis of rotation, and pendulum masses arranged with respect to it distributed over the circumference around the axis of rotation, which can be pivoted by means of self-aligning bearings along a predetermined pendulum path in the centrifugal force field of the damper device rotating about the axis of rotation are suspended from the carrier part, wherein the self-aligning bearings are each formed from raceways arranged on recesses in the pendulum masses and the carrier part and a pendulum roller axially overlapping the recesses and rolling on the raceways.

Drive trains of motor vehicles generally have an internal combustion engine subject to torsional vibrations, so that different torsional vibration isolation devices, for example torsional vibration dampers, centrifugal force pendulums and / or other mass absorbers, are known for calming them down.

Centrifugal pendulums are used for speed-adaptive torsional vibration isolation. The torsional vibration isolation takes place in that in the centrifugal field, pendulum masses suspended from a carrier part temporarily store energy entered as torque energy as potential energy and then release it again to the drive train.

As for example from the publications WO2014 / 023303 A1 and DE 10 2013 201 981 A1 known, one or more centrifugal pendulum on a torsional vibration damper, according to the document W02014 / 114 280 A1 on a clutch disc, according to the document EP 2 600 030 A1 be provided on a hydrodynamic torque converter, on a housing of a friction clutch or at similar locations on the drive train.

Here, the pendulum masses are accommodated on a carrier part rotatably arranged about an axis of rotation, such as a pendulum mass carrier, by means of two pendulum bearings spaced in the circumferential direction along a pendulum path predetermined by pendulum bearings in the centrifugal force field of the carrier part rotating about the axis of rotation. The effectiveness of torsional vibration isolation depends not only on the mass of the pendulum masses, but also on their radius relative to the axis of rotation.

Furthermore is from the publication DE 10 2011 101 977 A1 a torsional vibration damper is known in which a ring-shaped mass pendulum is provided which is mounted centrally to the axis of rotation and which is driven in rotation by a component of the torsional vibration damper over a limited angle of rotation by means of a toothing. Furthermore is in the not pre-published German patent application No. 10 2017 130 544.0 described a ring pendulum device in which two damper parts rotatable relative to one another about an axis of rotation are provided, of which one damper part is designed as a carrier part and driven in rotation and the other damper part serves as a damper mass. Between the two damper parts, pendulum masses distributed over the circumference are provided, with pendulum bearings between them and one damper part and between these and the other damper part, a radially limited movement of the pendulum masses allowing pivoting masses are provided.

The requirements for torsional vibration isolation are increasing particularly in hybrid drive trains, in which the installation space available for the damper device is often reduced by the additional use of an electric machine.

The object of the invention is the development of a speed-adaptive damper device. In particular, such a damper device should enable adequate torsional vibration isolation with a reduced installation space.

The object is solved by the subject matter of claim 1. The claims dependent on this represent advantageous embodiments of the subject matter of claim 1.

The proposed damper device is used for torsional vibration isolation, in particular for a drive train of a motor vehicle. For this purpose, the absorber device contains a support part rotatably arranged about an axis of rotation and, compared to this, pendulum masses distributed around the circumference around the axis of rotation, which are pivotally suspended on the support part by means of self-aligning bearings along a predetermined pendulum path in the centrifugal force field of the absorber device rotating about the axis of rotation, the pendulum bearings in each case are formed from recesses in the pendulum masses and the carrier part, the pendulum track defining the raceways and a pendulum roller axially overlapping the recesses and rolling on the raceways. In order to make the installation space for the pendulum masses more effective, particularly radially outward, the recesses of the pendulum masses are provided with an opening in the circumferential direction on one side. In this way, the wall section of closed recesses can be avoided. This makes additional installation space in the pendulum system of the pendulum masses accessible with their swinging movements.

In order to nevertheless keep the pendulum rollers captive in the recesses, the opening can have a smaller opening cross section than a cross section of the pendulum rollers through the central axis.

The proposed absorber device can be designed as a centrifugal pendulum with pendulum masses received on both sides on a support part designed as a pendulum flange or between two side parts that serve as a support part, the pendulum masses having two circumferentially spaced recesses, both recesses having an opening on the sides facing away from one another ,

In an alternative embodiment of the proposed damper device in the form of a ring pendulum, two damper parts can be provided which are rotatable relative to one another about the axis of rotation, one damper part being designed as a carrier part and the other damper part being designed as a damper mass, the pendulum masses being a single pendulum bearing relative to a damper part and with the form another damper part by means of a rotary bearing spaced in the circumferential direction from the self-aligning bearing with a radial degree of freedom.

For example, the wall distance of the recesses can be avoided by displacing the recesses with the raceways of the pendulum masses so far that the recesses are cut open on the outside in the circumferential direction. In this way, the required punch cross section is eliminated. At the same time, a small part of the path curvature of the raceways at the openings, which is necessary for producing closed recesses, is eliminated, so that additional installation space is saved. The openings of the recesses are advantageously narrower than the pendulum roller at the widest point, so that they are held captively in the recesses.

• - die Laufbahnen können weiter auseinandergerückt werden, so dass zusätzlicher Bauraum für eine zentrale Vernietung von axial gegenüberliegend angeordneten Pendelmassen oder aus mehreren Blechen geschichteten Pendelmassen, für Anschlagspuffer, für verbesserte Rollbedingungen für die Pendelrolle, für einen vergrößerten Abstand zwischen einem Drehlager und einem Pendellager mit einer größeren Hebelarmlänge in einem Ringpendel und/oder dergleichen zur Verfügung steht;
• - die Pendelmassen können kürzer ausfallen, so dass eine größere Teilung der Pendelmassen über den Umfang und/oder Pendelmassen mit geringerem Außendurchmesser möglich sind,
• - die Pendelmassen können axial verbreitert ausgebildet sein, da nur einseitig limitierende Stanzrundungen der Ausnehmungen darzustellen sind und auf diese Weise die Masse der Pendelmassen erhöht werden kann.

The following options are available due to the increase in installation space:

• - The raceways can be moved further apart, so that additional space for a central riveting of axially oppositely arranged pendulum masses or pendulum masses layered from several sheets, for stop buffers, for improved rolling conditions for the pendulum roller, for an increased distance between a pivot bearing and a pendulum bearing with one greater lever arm length in a ring pendulum and / or the like is available;
• the pendulum masses can be shorter, so that a greater division of the pendulum masses over the circumference and / or pendulum masses with a smaller outside diameter are possible,
• - The pendulum masses can be axially widened, since only one-sided limiting rounding of the recesses are to be shown and in this way the mass of the pendulum masses can be increased.

It goes without saying that the invention also includes carrier parts with cutouts bordering the cutouts on one or both sides, the cutouts being open towards the cutouts, that is to say the cutouts having openings in the circumferential direction with respect to the cutouts. The invention also provides recesses with openings provided in the circumferential direction, which are provided in support parts designed as a pendulum flange, through which recesses bolts or other connecting means for connecting axially opposite pendulum masses are guided.

• 1 eine Ansicht einer Pendelmasse für ein Fliehkraftpendel,
• 2 eine Ansicht einer Pendelmasse für ein Ringpendel,
• 3 eine Ansicht einer gegenüber der Pendelmasse der 1 abgeänderten Pendelmasse für ein Fliehkraftpendel,
• 4 eine Ansicht einer gegenüber der Pendelmasse der 2 abgeänderten Pendelmasse für ein Ringpendel und
• 5 eine Ansicht einer Tilgereinrichtung bei abgenommenen vorderen Pendelmassen.

The invention is based on the in the 1 to 5 illustrated embodiments explained in more detail. Show:

• 1 a view of a pendulum mass for a centrifugal pendulum,
• 2 a view of a pendulum mass for a ring pendulum,
• 3 a view of one opposite the pendulum mass of the 1 modified pendulum mass for a centrifugal pendulum,
• 4 a view of one opposite the pendulum mass of the 2 modified pendulum mass for a ring pendulum and
• 5 a view of an absorber device with removed front pendulum masses.

The 1 shows the pendulum mass 1 for a centrifugal pendulum with two circumferentially spaced recesses 2 with careers 3 to form a self-aligning bearing with a support part, not shown. The pendulum mass 1 is shortened on both circumferential ends compared to a conventional pendulum mass with a dashed outline, so that the recesses 2 are cut open and openings 4 to the outside. The width d of the openings 4 is smaller than the diameter D the pendulum rollers 5 so that they are secured against loss in the recesses 2 remain.

The 2 shows the pendulum mass intended for a ring pendulum 1a in view. In contrast to the pendulum mass 1 the 1 shows the pendulum mass 1a just a recess 2a with an opening 4a and a career 3a to form a self-aligning bearing with one of the absorber parts. In the circumferential direction spaced from the recess 2a is the pivot bearing 6a for radially displaceable storage of the pendulum mass 1a provided on the other absorber part of the ring pendulum. According to the pendulum mass 1 the 1 is the pendulum mass 1a only on one side compared to a conventional pendulum mass with a dashed outline, forming the opening 4a shortened.

The 3 shows the opposite of the pendulum mass 1 the 1 modified pendulum mass 1b which with the same dimensions of a conventional pendulum mass in the circumferential direction such an enlarged distance of the recesses 2 B with the careers 3b has the recesses 2 B openings to the outside in the circumferential direction 4b form.

According to the combination of the pendulum masses 1 and 1a the 2 and 3 shows the pendulum mass 1c the 4 with the same dimensions with a conventional pendulum mass, an increased distance between the pivot bearing 6c and the recess 2c with the career 3c on, so that the pivot bearing 6c opposite side of the recess 2c the opening 4c formed.

The 5 shows the absorber 7 with the support part designed as a pendulum flange 8th and the pendulum masses distributed on both sides over the circumference 1 , whose recesses are not shown, in view with the front pendulum masses removed. The carrier part 8th alternatively or in addition to cutouts of the pendulum masses provided with an opening in the circumferential direction 9 on the the recesses 10 with the careers 11 to form spherical bearings overlap with the pendulum masses, so that between cutouts 9 and recesses 10 openings 12 are trained.

LIST OF REFERENCE NUMBERS

1

pendulum mass

1a

pendulum mass

1b

pendulum mass

1c

pendulum mass

2

recess

2a

recess

2 B

recess

2c

recess

3

career

3a

career

3b

career

3c

career

4

opening

4a

opening

4b

opening

4c

opening

5

Spherical roller

6a

pivot bearing

6c

pivot bearing

7

Tilgereinrichtung

8th

support part

9

neckline

10

recess

11

career

12

opening

d

width

D

diameter

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• WO 2014/023303 A1 [0004]
• DE 102013201981 A1 [0004]
• WO 2014/114280 A1 [0004]
• EP 2600030 A1 [0004]
• DE 102011101977 A1 [0006]
• DE 102017130544 [0006]

Claims (4)

Damper device (7) in particular for a drive train of a motor vehicle with a support part (8) arranged rotatably about an axis of rotation and with pendulum masses (1, 1a, 1b, 1c) distributed around the circumference around the axis of rotation, which by means of self-aligning bearings along a predetermined pendulum track are pivotably suspended from the support part (8) in the centrifugal force field of the damper device (7) rotating about the axis of rotation, the self-aligning bearings each consisting of recesses (2, 2a, 2b, 2c, 10) of the pendulum masses (1, 1a, 1b, 1c) and the carrier part (8) arranged raceways (3, 3a, 3b, 3c, 11) and one of the recesses (2, 2a, 2b, 2c, 2d, 10) axially overlapping and on the raceways (3, 3a, 3b, 3c , 11) rolling pendulum roller (5) are formed, characterized in that the recesses (2, 2a, 2b, 2c, 2d, 10) are provided with openings (4, 4a, 4b, 4c, 12) in the circumferential direction on one side , Damper device (7) after Claim 1 , characterized in that the openings (4, 4a, 4b, 4c, 12) have a smaller width (d) than the diameter (D) of the pendulum rollers (5). Damper device (7) after Claim 1 or 2 , characterized in that the pendulum masses (1, 1b) have two circumferentially spaced recesses (2, 2b), both recesses (2, 2b) having an opening (4, 4b) on the sides facing away from one another. Damper device after Claim 1 or 2 , characterized in that two damper parts rotatably arranged relative to one another about the axis of rotation are provided, one damper part being designed as a carrier part and the other damper part being designed as a damper mass, the pendulum masses (1a, 1c) in each case being a single pendulum bearing with respect to one damper part and with the other damper part by means of a rotary bearing (6a, 6c) spaced in the circumferential direction from the self-aligning bearing with a radial degree of freedom.

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