DE112019000726T5 - PENDULUM DAMPING DEVICE - Google Patents

Abstract

Pendulum damping device (1) which is intended for installation in a transmission chain of a motor vehicle, in particular in a coupling and has the following: - a holder (2) which can be rotated about an axis (X), - a pendulum body (3) with at least a flywheel (5) which is vibrated with respect to the holder (2), and at least one connecting element (6) which is suitable for pairing at least one flywheel (5) with the holder (2), and - a friction element (30) which is suitable for rubbing on a pendulum body (3) or on a holder (2), characterized in that the friction element (30) with the holder (2) or with the pendulum body (3) is rotatably connected.

Description

Technical area

The present invention relates to a sway damping device, in particular for a coupling of a motor vehicle transmission system.

State of the art

A sway damping device is conventionally used to filter the vibrations due to the irregularities of an automobile engine. This is because the movements of the cylinders of an internal combustion engine generate irregularities which vary in particular as a function of the number of cylinders. These irregularities can in turn generate vibrations that get into the gearbox and cause shocks and noise nuisance that are undesirable. It is thus preferred to provide a device for filtering the vibrations.

The pendulum damping device is conventionally fixed with rivets in a rigid manner on a flywheel, a cover, a phase disc of a torsion damping device, in particular on a clutch, on a hydrodynamic torque converter or on a dry-running or wet-running double clutch. Such a torsion damping device is e.g. known as the dual mass flywheel.

The pendulum damping device conventionally has an annular holder which is intended to be set in rotation, as well as one or more pendulum bodies movable in relation to this holder. The displacement of each pendulum body in relation to the holder is generally guided by two rolling elements, each of which cooperates on the one hand with roller tracks of the holder and on the other hand with roller tracks of the pendulum body. Each pendulum body comprises e.g. two pendulum masses riveted together.

A pendulum body conventionally consists of two centrifugal masses, between which the holder is sandwiched and which are generally rigidly connected to one another via a web. The centrifugal masses can be riveted to the web or have windows in which the web extends.

• - sowohl translatorisch um eine zur Drehachse des Halters parallele fiktive Achse als auch
• - in Drehung um den Schwerpunkt der Pendelmasse verlagert wird, wobei eine derartige Bewegung auch als „kombinierte Bewegung“ bezeichnet wird.

As a variant, the shape of the runways can be such that each pendulum body in relation to the holder:

• - Both translationally about a fictitious axis parallel to the axis of rotation of the holder and also
• - is shifted in rotation around the center of gravity of the pendulum mass, such a movement also being referred to as a "combined movement".

In operation, the pendulum bodies are set in a movement with respect to the holder which combines a translational movement and a rotational movement. Through this movement of the pendulum bodies in relation to the holder, a filtration resistance torque can be generated which counteracts the vibration torque of the motor.

If the pendulum damping device rotates at a low speed of usually less than 800 revolutions / min, especially when starting the vehicle, when the vehicle is braking, when the engine is stationary or when changing gears, the centrifugal force exerted on the pendulum bodies is reduced and they therefore tend to move Approach axis of rotation. The contact of the pendulum bodies with the runways can thus be interrupted, which causes undesirable noises and shocks, which can reduce the service life of the pendulum damping device.

From the registration FR 3 046 649 in the name of the applicant is known a pendulum damping device with a spring which clamps the pendulum body on the holder, the spring limiting the displacements of the pendulum body in the radial direction when the rotation of the pendulum damping device is slowed down. This solution is not entirely satisfactory.

The aim of the invention is thus to offer a simple and economical solution to the above-mentioned problems.

Summary of the invention

• - mindestens einen Halter, der um eine Achse X drehbar ist,
• - einen Pendelkörper mit mindestens einer Schwungmasse, die in Bezug auf den Halter in Schwingung geführt ist, und mindestens ein Verbindungsorgan, das dazu geeignet ist, mindestens eine Schwungmasse mit dem Halter zu paaren, und
• - ein Reiborgan, das dazu geeignet ist, an einem Pendelkörper oder an einem Halter zu reiben,

bei der das Reiborgan mit dem Halter bzw. mit dem Pendelkörper drehfest verbunden ist.For this purpose, the invention proposes a sway damping device which is intended for installation in a transmission chain of a motor vehicle, in particular in a coupling, and which has the following:

• - at least one holder that can be rotated about an axis X,
• a pendulum body with at least one flywheel, which is guided in oscillation with respect to the holder, and at least one connecting member which is suitable for pairing at least one flywheel with the holder, and
• - a friction element suitable for rubbing against a pendulum body or a holder,

in which the friction element is non-rotatably connected to the holder or to the pendulum body.

As can be seen in more detail in the following description, the friction element can rub against one, the other or both centrifugal masses, that is, the pendulum body or the holder, with certain relative displacements of the pendulum body and the holder.

According to the invention, the friction member exerts a frictional force on the pendulum body or the holder, which counteracts the displacement of this pendulum body in relation to the holder or vice versa, whereby it is possible due to the energy absorbed by the friction to limit the noise that comes with the undesired shocks between the holder and the pendulum body or between the rolling element and the pendulum body or between the rolling element and the holder and can occur at the end of these relative displacements.

According to the invention, the friction element can be compressed between the centrifugal masses or between the holders. The friction element can exert an axial preload on the pendulum body or the holder, which is between 2 N and 15 N (Newtons), preferably between 4 N and 8 N and is equally distributed on each of the two centrifugal masses or on each of the two holders. The total clamping force, which is expressed in Newtons, is dependent both on the intrinsic characteristics of the friction element and on the coefficient of friction between the rolling element and the pendulum body.

The fact that the friction element is non-rotatably connected to the holder or to the pendulum body leads to a blocking of its rotation in relation to the holder or the pendulum body.

With such a device it is thus possible to maintain a homogeneous friction independently of the movement of the pendulum body or the holder with respect to the holder or the pendulum body. Such a frictional force can generate hysteresis.

The friction element advantageously has an axial prestress and a tangential prestress. In numerous hysteresis systems, there is play between the friction element and the element, usually a holder or a pendulum body, in which it is inserted. This play is created by manufacturing tolerances and a play that is required for the differential thermal expansion, usually when the friction element has a plastic housing, while the holder or the pendulum body is made of steel. With the tangential bias of the friction element in the sense of the present invention, this play between the friction element and the holder or the pendulum body can be compensated for. Another advantage of the present invention is that the friction element, which provides the main load (axial preload), also provides the tangential preload to compensate for the play.

The tangential preload is advantageously between 0.8 N and 6 N, preferably between 1.6 N and 3.2 N.

The values of the axial and / or tangential preloads are related to the coefficients of friction of the elements of the pendulum damping device, which vary depending on the environment in which it is located. The person skilled in the art is thus able to adapt the values of the pre-stresses depending on the environment of the application.

These values of the preload are also specified in the context of an application with friction for a passenger car. The person skilled in the art is thus able to adapt these values to other applications.

• - die erfindungsgemäße Vorrichtung kann in Öl oder in Luft funktionieren;
• - das Reiborgan weist Folgendes auf:
  • • einen ersten Abschnitt, der ein erstes axiales Ende definiert und aus einer Innenfläche und einer Außenfläche besteht, wobei die Außenfläche eine Reibfläche S₁ definiert,
  • • einen zweiten Abschnitt, der ein zweites axiales Ende definiert und aus einer Innenfläche und einer Außenfläche besteht, und
  • • ein elastisches Element, das vorteilhafterweise kegelstumpfförmig ist und sich zwischen einem ersten und einem zweiten Ende erstreckt, wobei das erste und das zweite Ende mit den Innenflächen des ersten bzw. zweiten Abschnitts in Kontakt stehen, so dass diese beiden Abschnitte axial voneinander entfernt werden;
• - die Außenfläche des zweiten axialen Endes definiert eine Reibfläche S₂ , die mit der Reibfläche S₁ identisch ist;
• - die Reibflächen S₁ und S₂ sind parallel zueinander;
• - sowohl der erste als auch der zweite Abschnitt des Reiborgans weisen mindestens ein Rastelement auf, wobei die Rastelemente dazu ausgebildet sind, eine lösbare Verrastung miteinander herzustellen;
• - der erste und der zweite Abschnitt des Reiborgans sind identisch; es ist dadurch möglich, die herzustellenden Teile zu normen;
• - das elastische, d.h. elastisch verformbare Element ist eine kegelstumpfförmige Feder;
• - das Reiborgan weist darüber hinaus zwei Positionierungsmittel auf, die an den Innenflächen liegen;
• - die Positionierungsmittel sind kegelstumpfförmig;
• - die Mitten der Positionierungsmittel sind in Umfangsrichtung zueinander versetzt;
• - die Mitten der Positionierungsmittel sind mit einem Abstand zwischen 5 und 50 mm in Umfangsrichtung zueinander versetzt;
• - der Wert der axialen Vorspannung beträgt mehr als 2,5 N, und die tangentiale Vorspannung beträgt mehr als 1 N;
• - das Reiborgan ist so ausgebildet, dass es die Bremsung des Pendelkörpers oder des Halters ausübt;
• - das Reiborgan wirkt mit axialen Innenflächen der Pendelmassen zusammen, die im Wesentlichen eben sind.

The device according to the invention can also include one or more of the following features, which are considered individually or in all technically possible combinations:

• the device according to the invention can function in oil or in air;
• - the friction element shows:
  • A first section defining a first axial end and consisting of an inner surface and an outer surface, the outer surface being a friction surface S ₁ Are defined,
  • A second section defining a second axial end and consisting of an inner surface and an outer surface, and
  • An elastic element, advantageously frustoconical and extending between a first and a second end, the first and second ends being in contact with the inner surfaces of the first and second sections, respectively, so that these two sections are axially spaced apart;
• the outer surface of the second axial end defines a friction surface S ₂ that with the friction surface S ₁ is identical;
• - the friction surfaces S ₁ and S ₂ are parallel to each other;
• - Both the first and the second section of the friction member have at least one locking element, the locking elements for this purpose are designed to produce a releasable latching with one another;
• the first and second sections of the friction element are identical; it is thereby possible to standardize the parts to be produced;
• - the elastic, ie elastically deformable element is a frustoconical spring;
• the friction element also has two positioning means which lie on the inner surfaces;
• the positioning means are frustoconical;
• - The centers of the positioning means are offset from one another in the circumferential direction;
• - The centers of the positioning means are offset from one another in the circumferential direction with a distance between 5 and 50 mm;
• - the axial preload value is greater than 2.5 N and the tangential preload is greater than 1 N;
• - The friction member is designed so that it applies the braking of the pendulum body or the holder;
• - The friction element interacts with axial inner surfaces of the pendulum masses, which are essentially flat.

The invention also relates to a component for a transmission system of a motor vehicle, the component being in particular a dual mass flywheel, a hydrodynamic torque converter or a clutch friction disk with a pendulum damping device according to the invention.

• - einem Verbrennungsmotor zum Antreiben des Fahrzeugs und
• - einem Bauteil für ein erfindungsgemäßes Übertragungssystem.

Finally, according to another of its aspects, the invention relates to a vehicle drive train with:

• - an internal combustion engine for driving the vehicle and
• - A component for a transmission system according to the invention.

Figure list

• - 1 teilweise von vorne und in Durchsicht eine Pendeldämpfungsvorrichtung gemäß der vorliegenden Erfindung, wobei die Vorrichtung in einer ersten Ausgestaltung vorliegt,
• - 2 ein Reiborgan gemäß einem Ausführungsbeispiel der Erfindung,
• - 3 ein Reiborgan gemäß einem weiteren Ausführungsbeispiel der Erfindung, das in einem Halter eingesetzt ist,
• - 4a und 4b Schnittansichten entlang der Schnittebene B-B, die in 3 gezeigt ist, bzw. D-D, die in 4a gezeigt ist,
• - 5 ein Beispiel für ein Verfahren, mit dem ein elastisches Element erhalten werden kann, das gemäß zwei Achsen komprimiert wird.

Other features, objects and advantages of the present invention will be better understood upon reading the following detailed description and from the accompanying drawings, given by way of non-limiting example. In the drawings show:

• - 1 partially from the front and in phantom, a pendulum damping device according to the present invention, the device being in a first embodiment,
• - 2 a friction member according to an embodiment of the invention,
• - 3 a friction member according to a further embodiment of the invention, which is inserted in a holder,
• - 4a and 4b Sectional views along the section plane BB shown in 3 is shown, or DD, which is shown in 4a is shown
• - 5 an example of a method by which an elastic element can be obtained which is compressed along two axes.

In the different figures, identical reference symbols are used to designate identical or similar organs.

Definitions

For the purposes of the present invention and unless otherwise stated, “axial” means “parallel to the axis of rotation X of the holder”;
“radial” means “along a transverse axis that intersects the axis of rotation of the holder”;
“At an angle” or “in the circumferential direction” means “around the axis of rotation of the holder”, ie oriented orthogonally to the X axis of the holder and orthogonally to the radial direction. When two elements are referred to as being “offset in the circumferential direction”, this means that the centers of these elements, which lie around the axis of rotation of the holder, are not axially aligned with one another. The distance between the two centers of the two elements referred to as being offset in the circumferential direction is the distance that separates these two centers in one and the same circumferential plane.

“Centrifugal contact” is to be understood as a contact force that comprises a component that is directed away from the X axis.

“Motor vehicle” is to be understood as meaning not only passenger vehicles, but also industrial vehicles, which in particular includes trucks, vehicles for public transport or agricultural vehicles.

A “pendulum body” is understood to mean a mass that is attached in such a way that it oscillates on the holder in response to the irregularities of the vehicle engine. A pendulum body conventionally consists of two oscillating masses which extend so that they sandwich the holder and which are rigidly fixed to one another are connected. A pendulum body can also consist of a single flywheel.

“Braking” is the effect of friction that counteracts movement without completely blocking it.

Two parts are said to be “paired” when they are permanently locked together. This blocking can result from the direct attachment of the first part to the second part or from the attachment via one or more intermediate parts.

The rest position of the device is that in which the centrifugal masses are subjected to a centrifugal force, but not to torsional vibrations which originate from the irregularities of the internal combustion engine.

The centrifugal masses are referred to as “held by the centrifugal force” if the rotational speed of the holder is sufficient so that the centrifugal masses are held radially outward against the rolling elements and via these against the holder.

Unless otherwise stated, the verbs “comprise”, “have” or “contain” are used in the broad sense, i.e. to be interpreted in a non-limiting manner.

Detailed description of the invention

A pendulum damping device according to the invention 1 is in 1 partially shown. In particular, a motor vehicle transmission system can use the device 1 be equipped, which is integrated, for example, in a component (not shown) of such a transmission system, this component being, for example, a dual mass flywheel, a hydrodynamic torque converter, a degree of swing firmly connected to the crankshaft, a dry-running or wet-running double clutch, a simple wet clutch, a Component of a hybrid drive train or a clutch friction disc.

This component can be part of a drive train of a motor vehicle which has an internal combustion engine with a predetermined number of cylinders, e.g. with three, four or six cylinders.

Such a component can have a torsion damper in a known manner which comprises at least one input element, at least one output element and organs for elastic restoring with circumferential action, which are arranged between the input and the output element. For the purposes of the present application, the terms “input” and “output” are defined in relation to the direction in which the torque is transmitted from the vehicle's internal combustion engine to its wheels.

The pendulum damping device 1 has a pendulum body 3 on that on a holder 2 is appropriate. The pendulum body 3 includes two flywheels 5 that have at least one connecting element, generally called a "strut" 6 are paired. Each of the flywheels 5 has a body that extends radially and circumferentially and is generally arcuate. The flywheels 5 lie on one side and the other of a holder 2 and are axially opposite one another.

The pendulum damping device 1 also has a friction element 30th on.

• - ein Eingangselement des Torsionsdämpfers,
• - ein Ausgangselement oder ein Phasenzwischenelement, das zwischen zwei Federreihen des Dämpfers angeordnet ist, oder
• - ein Element, das mit einem der vorgenannten Elemente drehfest verbunden ist und sich von diesen unterscheidet, wobei es sich dann z.B. um einen zur Vorrichtung 1 zugehörigen Halter handelt.

The holder 2 can be:

• - an input element of the torsion damper,
• an output element or an intermediate phase element which is arranged between two rows of springs of the damper, or
• - An element which is non-rotatably connected to one of the aforementioned elements and differs from these, in which case it is, for example, one for the device 1 associated holder is.

The holder 2 is in particular a guide disk or a phase disk.

The holder 2 can also be another element, such as a flange.

In the example under consideration, the holder has 2 overall, the shape of a ring, which consists of a stamped metal sheet, generally made of steel, with a thickness of usually less than 10 mm, preferably less than 9 mm, preferably less than 8 mm.

On the holder 2 Additional organs such as damping buffers and / or stops and / or guides for damping and / or limiting and / or guiding the oscillating movement of the centrifugal masses, which for example consist of polymer, can be attached.

Multiple windows 19th traverse the holder 2 according to its thickness. The window 19th define empty spaces within the holder 2 . The window 19th can be arranged in pairs. The pairs of windows 19th are evenly around the entire circumference of the holder 2 distributed. The holder 2 has just as many pairs of windows 19th like flywheels 5 on.

The device 1 also has at least one rolling element 11 , e.g. a role on. Every pendulum body 3 is conventionally about two rolling elements 11 each having a window 19th of the holder and the movement of the flywheels 5 in relation to the holder 2 lead, swinging on the holder 2 appropriate. Every roll organ 11 works on the one hand with one with the holder 2 firmly connected runway 12 and on the other hand with one with the pendulum body 3 firmly connected runway 13 together when the pendulum body 3 is held by centrifugal force. The edges of the windows 19th , in particular the radially outer parts of the edges define the holder roller tracks 12 . The concave radially outer edge of the strut 6 that to the exterior of the holder 2 is agile, the strut runway 13 form. Alternatively, the concave radially inner edge of a window in one of the flywheels 5 is formed, the strut runway 13 form. The rolling organs 11 can freely in the windows 19th of the holder 2 to be appropriate. The rolling surface of the roller organ 11 can be a cylinder with constant radius.

In 1 one of the flywheels is shown in phantom, so that the runways 12 , 13 and the rolling elements 11 you can see.

The pendulum bodies 3 are preferably distributed around the X axis at the same angle. Their number is preferably greater than or equal to two and / or less than eight. The device can in particular have two, three, four, five, six or seven centrifugal masses 3 include.

The flywheels 5 , the liaison bodies 6 and the rolling elements 11 are for example made of steel. The rolling organs 11 and the associated connecting organs 6 are each in the same window 19th that is in the holder 2 is formed, arranged.

The device 1 also has a friction element 30th on, the axially between the first and second centrifugal masses 5 is arranged. The friction organ 30th can in one in the holder 2 formed opening 34 be recorded and on the first and second flywheels 5 rub. The opening 34 is here for the friction organ 30th provided, ie it does not take up any further element. The opening 34 differs from the windows 19th .

The friction organ 30th is rotatably fixed with the holder 2 connected. The opening 34 and the shape of the friction organ 30th are designed, for example, so that the friction element 30th rotatably with the holder 2 connected is. In other words is the opening 34 designed so that the friction element 30th the (translational and rotational) movements of the pendulum body 3 does not follow. In the device according to the present invention, the friction element can thus 30th when the keeper 2 not turning, not turning either. When the pendulum body 3 is subject to rotation, rubs the friction element, for example 30th to dampen its rotation.

The friction organ 30th enables in particular a limitation of the swing of the pendulum body 3 or the holder 2 in the circumferential and rotational direction.

The opening advantageously has 34 a shape made up of at least two points that are at different distances from a point called the center. The opening 34 usually has any geometric shape other than a circle. Advantageously have the opening 34 and the friction organ 30th partially complementary shapes, further advantageously completely complementary shapes. In the example of 1 have the opening 34 and the friction organ 30th completely complementary shapes.

The radial dimension of the opening is advantageous 34 slightly larger than the radial dimension of the friction element 30th . This radial play is in particular between 1% and 10% of the radial dimension of the friction element in the opening 34 .

At the in 1 Illustrated embodiment and according to the invention is the friction member 30th from the holder 2 and the pendulum body 3 independently. It is neither on the holder 2 still on the pendulum body 3 rigidly attached.

The lack of a rigid attachment of the friction element is advantageous 30th in particular a simpler and faster assembly of the device 1 possible.

In a variant not shown, the pendulum damping device 1 a pendulum body 3 with one between two holders 2 attached flywheel 5 on. The friction organ 30th is then received in an opening in the flywheel and can be attached to the two holders 2 rub axially on one side and the flywheel on the other 5 lie.

2 shows a friction element 30th that is at the device 1 can be used in accordance with the present invention.

The friction organ 30th includes a first section 32 and a second section 33 that can form a housing. As in 1 illustrates defines the first section 32 the end of the friction organ 30th , the opposite of the first pendulum mass 5 of the pendulum body 3 lies while the second section 33 the end of the friction organ 30th defines that compared to the second pendulum mass 5 this pendulum body 3 lies.

The first paragraph 32 defines a first axial end and consists of an inner surface 32i and an outer surface 32e . The outside surface 32e defines a friction surface S1 . The second section 33 defines a second axial end and consists of an inner surface 33i and an outer surface 33e . The outside surface 33e defines a friction surface S2 . The friction surface S2 is advantageously identical to the friction surface S1 . The inner surfaces 32i and 33i stand with the elastic element 31 in contact.

At the in 2 In the illustrated embodiment, the first and second sections 32 and 33 each have a locking element. The locking element can on the one hand by a hook 35 and on the other hand through an eyelet 36 be formed so that the hook 35 of the first section 32 and the eyelet 36 of the second section 33 and vice versa form a releasable latch.

The friction element advantageously has 30th also an elastic element 31 on that within this friction organ 30th lies. The elastic element 31 thus does not define the scope of the friction element 30th . The elastic element is advantageous 31 a frustoconical spring.

The friction element advantageously has 30th also two positioning means 37 on that on the inner surfaces 32i or. 33i lie.

3 shows the friction organ 30th according to a further embodiment of the invention, which is in a holder 2 is used. In the example under consideration, the friction element is 30th not between the two centrifugal masses 5 of the pendulum body 3 clamped. If there is no such clamping, it is the locking elements of the friction element 30th the one hand by a hook 35 and on the other hand through an eyelet 36 may be formed that the first section 32 and the second section 33 stick together. An embodiment of the releasable locking system is in the 4a and 4b shown in more detail.

The latching element or the latching elements are advantageously used to hold the first and second sections 31 and 32 of the friction element in position on the production line.

In a variant not shown, the friction element 30th in an opening of the holder 2 or the pendulum body 3 recorded and axially by two flywheels 5 of the pendulum body 3 or by two holders 2 be clamped. When the friction organ 30th by two flywheels 5 of the pendulum body 3 or by two holders 2 axially clamped are the ends 37 and 38 the locking elements spaced apart axially and thus no longer in contact.

As in the 3 and 4a As illustrated, the elastic member extends 31 between a first and a second end, the first and the second end with the inner surfaces ( 32i and 33i) of the first or second axial end ( 32 and 33 ) stay in contact.

The friction element advantageously has 30th an axial preload and a tangential preload. The axial preload is achieved by clamping the elastic element 31 by the convergence of the first and second sections 32 and 33 receive.

The tangential prestressing is advantageously achieved by shearing the first section 32 and the second section 33 receive. Assuming the first section 32 and the second section 33 together form a cuboid, the shear is a change in the angle, which is no longer a right angle. This corresponds to forces that usually apply to the first and second friction surfaces S1 and S2 be exercised parallel to the surface.

As in the 3 and 4a shown, the shear causes the centers of the positioning means 37 are offset from one another in the circumferential direction and at a distance d which is between 5 and 50 mm. Before the shear, the centers are the positioning means 37 around the axis of rotation of the holder 2 are axially aligned.

5 shows an example of a shearing method with which it is possible to locate the centers of the positioning means 37 to offset each other in the circumferential direction. In a first step, the first and second sections 32 and 33 on an uncompressed elastic element 31 such as a straight or frustoconical spring. In a second step there is a vertical compression, ie in one to the surfaces S ₁ and S ₂ perpendicular plane, carried out by the first and the second section 32 and 33 are moved closer to each other so that the axial preload is maintained. Eventually there will be a horizontal shear, ie in one to the faces S1 and S2 parallel plane, by shifting the two sections 32 and 33 performed, resulting in an inclination of the elastic element 31 leads and thereby a force is opposed. It follows from these steps that the friction element 30th an elastic element 31 which is compressed along two axes.

The horizontal shear is advantageously carried out by displacing the first and / or second section 32 and 33 in one to the surfaces S ₁ and S ₂ parallel plane. Will only be a section 32 or 33 in one to the surfaces S1 and S2 moving parallel plane is the second section 32 or 33 fixed.

The invention is of course not described in terms of the embodiments described and shown, which are only used for illustration. The various embodiments could also be combined.

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely 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

• FR 3046649 [0009]

Claims (10)

Pendulum damping device (1) which is intended for installation in a transmission chain of a motor vehicle, in particular in a coupling and has the following: - at least one holder (2) which can be rotated about an axis (X), - a pendulum body (3) at least one flywheel (5), which is guided in oscillation with respect to the holder (2), and at least one connecting member (6) which is suitable for pairing at least one flywheel (5) with the holder (2), and - A friction element (30) which is arranged axially between a first and a second flywheel (5) and is suitable for rubbing against these, or a friction element (30) which can rub against two holders (2) which axially open the one and the other side of the flywheel (5), characterized in that the friction element (30) is non-rotatably connected to the holder (2) or to the pendulum body (3). Device according to Claim 1 , characterized in that the friction element (30) has an axial prestress and a tangential prestress. Device according to Claim 1 or 2 , characterized in that the friction member (30) has: - a first section (32) which defines a first axial end and consists of an inner surface (32i) and an outer surface (32e), the outer portion (32e) being a friction surface S ₁ defines - a second portion (33) which defines a second axial end and consists of an inner surface (33i) and an outer surface (33e), and - an elastic element (31), which is advantageously frustoconical and extends between a first and second ends, the first and second ends being in contact with the inner surfaces (32i and 33i) of the first and second sections (32 and 33), respectively, so that these two sections are axially separated from one another. Device according to Claim 3 , characterized in that the outer surface (33e) of the second axial end defines a friction surface S ₂ which is identical to the friction surface S ₁ . Device according to Claim 3 or 4th , characterized in that both the first and the second section (32 and 33) have at least one latching element, the latching elements being designed to produce a releasable latching with one another. Device according to one of the Claims 3 to 5 , characterized in that the friction element (30) also has two positioning means (37) which lie on the inner surfaces (32i and 33i), the centers of the positioning means being offset from one another in the circumferential direction. Device according to Claim 6 , characterized in that the centers of the positioning means (37) are offset from one another in the circumferential direction with a distance between 5 and 50 mm. Device according to one of the preceding claims, characterized in that the value of the axial pre-tension is more than 2.5 N and the tangential pre-tension is more than 1 N. Component for a transmission system of a motor vehicle, the component being in particular a dual-mass flywheel, a hydrodynamic torque converter or a clutch friction disk with a pendulum damping device according to one of the preceding claims. Vehicle drive train with: - an internal combustion engine for driving the vehicle and - A component for a transmission system according to the preceding claim.

Images