DE102016107403A1 - Device for damping torsional vibrations - Google Patents

Abstract

Torsional vibration damping device (1) comprising:
A holder (2) which is rotatable about an axis (X),
At least one pendulum body (3) comprising: a first and a second pendulum mass (5) axially spaced apart and movable relative to the holder (2), the first pendulum mass (5) being axially movable on a first side of the holder (2 ) and the second pendulum mass (5) is arranged axially on a second side of the holder (2), and with at least one member (6) for connecting the first and the second pendulum mass (5), which arranges the masses in pairs,
wherein the holder (2) and the pendulum masses (5) comprise metal and the device (1) is designed so that the axial abutment of a pendulum mass (5) on the holder (2) never manifests itself exclusively by a contact of metal to metal.

Description

The present invention relates to a device for damping torsional vibrations, in particular for a motor vehicle transmission system.

In such an application, the torsional vibration damping device may be incorporated in a torsional damping system of a clutch with which the internal combustion engine can optionally be connected to the transmission in order to filter the vibrations due to the nonuniformities of the engine.

As a variant, in such an application, the torsional vibration damping device may be integrated in a friction disc of the clutch or in a hydrodynamic torque converter.

In such a Torsionsschwingungsdämpfungsvorrichtung a metal holder and one or more movable to this holder pendulum body are conventionally used, the displacement of the pendulum body is guided with respect to the holder of rolling members, which cooperate on the one hand with runways, which are fixedly connected to the holder, and on the other with roller tracks, which are firmly connected to the pendulum bodies. Each pendulum body has, for example, two pendulum masses of metal, which are riveted together and sandwich the holder.

Between the pendulum masses and the holder axial shocks can occur. These axial impacts then correspond to contact of metal on metal and can lead to premature wear of the above elements of the damping device and / or produce unwanted noise.

To prevent the occurrence of such shocks, for example, from the application DE 10 2006 028 556 known to arrange plastic shoes axially between the holder and the pendulum masses of a body. Since such shoes are made of plastic, they can not withstand high temperatures, otherwise they are subject to problems in terms of mechanical resistance or premature wear. However, the temperature in the clutch cover can rise up to 200 ° C. Such plastic shoes are thus not permanently effective.

There is a need to permanently reduce the problems associated with the axial impacts between the holder and the pendulum masses.

• – einen Halter, der um eine Achse drehbeweglich ist,
• – mindestens einen Pendelkörper, mit: einer ersten und einer zweiten Pendelmasse, die axial voneinander beabstandet und bezogen auf den Halter beweglich sind, wobei die erste Pendelmasse axial auf einer ersten Seite des Halters und die zweite Pendelmasse axial auf einer zweiten Seite des Halters angeordnet ist, und mit mindestens einem Organ zur Verbindung der ersten und der zweiten Pendelmasse, das die Massen paarweise ordnet, wobei der Halter und die Pendelmassen Metall umfassen und die Vorrichtung so ausgelegt ist, dass das axiale Anschlagen einer Pendelmasse am Halter sich niemals ausschließlich durch einen Kontakt von Metall auf Metall ausdrückt.

The object of the invention is to respond to this need, according to one of its aspects with a device for damping torsional vibrations, which comprises:

• A holder which is rotatable about an axis,
• - At least one pendulum body, comprising: a first and a second pendulum mass axially spaced and movable relative to the holder, wherein the first pendulum mass axially on a first side of the holder and the second pendulum mass is axially disposed on a second side of the holder , and at least one member for connecting the first and second pendulum mass, which pairs the masses, wherein the holder and the pendulum masses comprise metal and the device is designed so that the axial abutment of a pendulum mass on the holder never exclusively by a contact from metal to metal.

In other words, if the invention permits the presence of metal-to-metal contact when a pendulum mass is axially in abutment with the holder, either from the first use of the apparatus or after a certain number of cycles of use, that metal-to-metal contact is in other words never the only contact that exists in such an axial stop position. Such an effect is not achieved with the plastic shoes of the prior art, since as soon as these shoes are completely worn out there is only a metal to metal contact between the holder and the pendulum masses.

• – bedeutet „axial” „parallel zur Drehachse des Halters”,
• – bedeutet „radial” „entlang einer Achse, die zu einer Ebene gehört, die orthogonal zur Drehachse des Halters verläuft und diese Drehachse des Halters schneidet”,
• – bedeutet „winkelmäßig” oder „umfangsmäßig” „um die Drehachse des Halters herum”,
• – bedeutet „fest verbunden” „starr gekoppelt”,
• – ist die Ruhestellung der Vorrichtung diejenige, in der die Pendelkörper einer Fliehkraft aber keinen Torsionsschwingungen ausgesetzt sind, welche aus den Ungleichförmigkeiten des Verbrennungsmotors stammen,
• – bedeutet „ein Teil ist axial in Anschlag an einem anderen Teil”, dass diese beiden Teile aufgrund eines Kontakts zwischen diesen beiden Teilen axial zueinander fest sind.

For the purposes of the present application:

• - means "axially""parallel to the axis of rotation of the holder",
• - means "radially""along an axis belonging to a plane orthogonal to the axis of rotation of the holder and intersecting this axis of rotation of the holder",
• - means "angular" or "circumferential""around the axis of rotation of the holder",
• - means "firmly connected""rigidlycoupled",
• The rest position of the device is that in which the pendulum bodies of a centrifugal force but are not subjected to torsional vibrations which originate from the irregularities of the internal combustion engine,
• - means "one part is axially in abutment with another part", that these two parts are axially fixed to each other due to a contact between these two parts.

According to a first embodiment of the invention, the holder or a pendulum mass carries an organ to the axial intermediate position, said organ to the axial intermediate position a Plastic portion and a metal portion includes, wherein these portions are arranged so that when axial abutment of this pendulum mass on the holder of this axial abutment takes place on the one hand on the plastic portion of the organ to the axial intermediate position and on the other hand via the metal portion of the organ to the axial intermediate position.

In other words, according to this first embodiment of the invention, the metal portion and the plastic portion at the same time ensure the contact between the pendulum mass and the holder during axial abutment. Due to the presence of the plastic portion, it is possible, similar to the prior art plastic shoes, to have no local contact of metal on metal and thus to limit the wear and the noise associated with this contact from metal to metal. With the presence of the metal portion of the plastic portion can be protected. Namely, this metal portion is not affected by the above-mentioned problems inherent in the plastic, so that its behavior changes only slightly in the long term. The presence of the metal portion thus prevents the wear of the plastic portion by friction as the pendulum body moves. There is thus always a plastic part, which participates in the above-mentioned axial striking.

According to the first embodiment, the axial intermediate position part is a separate part from the pendulum body and the holder, but it may be supported by the holder or the pendulum body.

This intermediate position part can have a portion which is arranged axially between the holder and the pendulum mass, so that the axial abutment of the pendulum mass on the holder via this portion of the intermediate position part. Both the holder and the pendulum mass thus reach into contact with this portion of the intermediate position part.

According to a first variant of this first embodiment, the metal portion may be received in a cavity formed in the plastic portion, said cavity opening into an end face of the plastic portion and the end face ensuring contact over the plastic portion when the pendulum mass axially engages the holder ,

In other words, then the metal portion is supported by the plastic portion.

The cavity may have a shape that prevents leakage of the metal portion once the metal portion is disposed in the cavity.

The dimensions of the metal portion and the cavity may be such that the metal portion is flush with this end surface of the plastic portion when the metal portion is disposed in the cavity. It is thus ensured an axial striking, which takes place simultaneously over the metal portion and the plastic portion.

In a variant, the dimensions of the metal portion and the cavity may be such that the metal portion projects beyond the end surface of the plastic portion out of the cavity when the metal portion is disposed in the cavity, the plastic portion being sufficiently compressible to allow the metal portion to become interior of the cavity moves when the pendulum mass presses axially on the holder just before it axially abuts the holder so that the metal portion then flush with this end face of the plastic portion as soon as the pendulum mass is axially against the holder in abutment. In this case, there may be a transition phase prior to the axial abutment in which there is only one contact over the metal portion and in which the pendulum mass still moves axially relative to the holder due to the ongoing compression of the plastic portion. As soon as the maximum compression state for the plastic section has been reached, the pendulum mass is axially in abutment against the holder, and this striking takes place via the plastic section and over the metal section.

In one or other of the above variants, the plastic portion may be received in a hole formed in the pendulum mass or in the holder, and by placing the metal portion in the cavity, a force is then exerted on the plastic portion, which clamps this plastic portion in Hole allows.

In other words, then the plastic portion is not held in position in the hole, as long as the metal portion is not disposed therein.

Alternatively, in one or other of the above variants, the metal portion may be press-fitted in the cavity. Holding the plastic portion in the hole thus does not depend on the placement of the metal portion in the cavity.

In all of the foregoing, one or more gaps may be formed in the wall of the cavity so that insertion of the metal portion therein is facilitated.

In all of the foregoing, the metal portion may be a sphere, such as a steel ball.

As a variant, the metal portion may be a metal insert formed on the plastic portion.

The intermediate axial position member is supported, for example, by the holder. In this case, the plastic portion may extend into a blind hole formed in one of the sides of the holder. In this side of the holder, a plurality of blind holes may be formed, each hole then receives an organ to the axial intermediate position with which an inventive axial abutment of the pendulum mass on the holder relative to this side of the holder can be obtained.

In the other side of the holder further blind holes may be formed, each blind hole then receives organs to the axial intermediate position, so that an inventive axial abutment of the pendulum mass is obtained on the holder relative to this other side of the holder.

As a variant, the plastic portion may be received in a through hole formed in the holder. The plastic portion may extend axially between two end surfaces in each of which a cavity for a metal portion, such as a ball is formed.

As a variant, the axial intermediate position member is carried by one side of a pendulum mass facing the holder. A hole that is or is not a blind hole and receives a plastic portion is then provided in this side of the pendulum mass. The metal portion may then be received in a cavity formed in the plastic portion disposed in this hole.

Each pendulum mass of a pendulum body has, for example, a side opposite to the holder, in which a plurality of holes are formed, each hole receiving an axial intermediate position member as mentioned above.

According to this first embodiment of the invention, the holder as well as the pendulum masses may be made of metal.

• – mindestens einen Metallvorsprung definiert, der sich axial zur axial gegenüberliegenden Seite bzw. Fläche erstreckt, und
• – mindestens ein Kunststoffteil trägt, das sich axial zur axial gegenüberliegenden Seite bzw. Fläche erstreckt.

According to a second embodiment of the invention, one of the sides of the holder lies axially opposite a surface of one of the pendulum masses, this surface or this side being:

• - Defined at least one metal projection which extends axially to the axially opposite side or surface, and
• - At least one plastic part carries, which extends axially to the axially opposite side or surface.

According to this second embodiment of the invention, the axial abutment of a pendulum mass on the holder is not only an additional, separate from the holder and the pendulum mass part.

When the pendulum mass is abutted axially on the holder, a contact between metal and metal is obtained directly via the holder and the pendulum mass.

According to a first variant, the plastic part extends axially beyond the metal projection. In this case, the axial abutment of the pendulum mass on the holder takes place exclusively on the plastic part, as long as its wear has not eliminated the axial offset, which is present in advance between the plastic part and the metal projection. The operation of the device is thus similar in a first usage range to that with the prior art plastic shoes. Once the axial offset has been eliminated due to the wear of the plastic part, the plastic part and the metal projection are axially at the same height, so that the axial abutment takes place simultaneously on the plastic part and the metal projection, similar to that described with reference to the first embodiment of the invention.

According to a second variant, the plastic part and the metal projection extend to the same extent axially from the surface of a pendulum mass to the side of the holder or from the side of the holder to the surface of the pendulum mass. Thus, each axial abutment takes place simultaneously over the plastic part and the metal projection, without the first use region according to the variant described above being present.

The metal projection and the plastic part are carried for example by the pendulum mass. For example, a plurality of metal protrusions are carried by the pendulum mass, each metal protrusion being formed, in particular, near an angled end of the pendulum mass.

The plastic part may extend integrally between the two metal projections. As a variant, the plastic part may have a plurality of separate sections which succeed one another between the two metal projections of the pendulum mass.

In a variant, the metal projection and the plastic part are carried by the holder.

The device may comprise at least one rolling element, which cooperates on the one hand with a runway, which is fixedly connected to the holder, and on the other hand with at least one runway, which is fixedly connected to the pendulum body to the Displacement of the pendulum body with respect to the holder to lead.

The rolling element can interact only via its outer surface with the fixed to the holder runway and with the fixed to the pendulum body runway. Thus, one and the same portion of this outer surface may alternatively cooperate with the runway fixedly connected to the holder and with the runway fixedly connected to the pendulum body, when the rolling element is displaced.

The connecting member may be disposed in a window formed in the holder, and a part of the edge of this window may form the runway fixedly connected to the holder.

According to one embodiment of the invention, the fixed to the pendulum body runway is defined by the connecting member. In other words, the rolling element cooperates on the one hand with the holder and on the other with the connecting member to guide the displacement of the pendulum body with respect to the holder. According to this example, one and the same window formed in the holder receives part of the connecting member and has an edge, a part of which forms the runway fixed to the holder. Each rolling element can only be acted upon by compression between the above runways. The fixedly connected to the holder runway and fixed to the pendulum body runway, which cooperate with one and the same rolling element, at least partially radially opposite each other, d. H. There are levels that are perpendicular to the axis of rotation and in which extend these two runways.

According to a further embodiment of the invention, the pendulum body can define two separate runways, wherein a runway in the first pendulum mass and a runway in the second pendulum mass are defined. For example, the first and second pendulum masses have a cavity that receives the rolling element, and part of the edge of this cavity forms the corresponding raceway. The part of the rolling element which is arranged axially between the first and the second pendulum mass is received in a cavity of the holder, this cavity being separated from the window in which the connecting element is received.

• – einen Abschnitt, der in einem Hohlraum der ersten Pendelmasse angeordnet ist und mit der Rollbahn zusammenwirkt, die von einem Teil des Rands dieses Hohlraums gebildet ist,
• – einen Abschnitt, der in einem Hohlraum des Halters angeordnet ist und mit der Rollbahn zusammenwirkt, die von einem Teil des Rands dieses Hohlraums gebildet ist, und
• – einen Abschnitt, der in einem Hohlraum der zweiten Pendelmasse angeordnet ist und mit der Rollbahn zusammenwirkt, die von einem Teil des Rands dieses Hohlraums gebildet ist.

The roll member may then sequentially include:

• A portion which is disposed in a cavity of the first pendulum mass and cooperates with the runway formed by a part of the edge of this cavity,
• A portion which is disposed in a cavity of the holder and cooperates with the runway formed by a part of the edge of this cavity, and
• - A portion which is disposed in a cavity of the second pendulum mass and cooperates with the runway, which is formed by a part of the edge of this cavity.

Each pendulum body may be equipped with one or more stop damping members, with which the shocks between the pendulum body and the holder at the end of a displacement of the pendulum body from the rest position and / or at a radial fall of the pendulum body, for example when stopping the vehicle combustion engine can be reduced ,

Each stop damping member is arranged, for example, radially between the radially inner edge of the connecting member and the radially inner edge of the window.

In a particular embodiment of the invention, each pendulum body on two connecting members, wherein each connecting member cooperates with a rolling member and each connecting member is assigned to a stop damping member.

Each stop damper can have elastic properties that enable the damping of the shocks associated with the contact of the pendulum body and the holder. Each stop damping element consists for example of elastomer or rubber.

From the holder separate windows can then be assigned to one and the same pendulum body, each window receives one of the connecting members and optionally the associated rolling element.

In all of the foregoing, for example, each rolling element is a roller of circular cross-section in a plane perpendicular to the axis of rotation of the holder. The axial ends of the roller may be provided without a thin annular border. The roll is made of steel, for example. The roll can be hollow or full.

In all the foregoing, the shape of the runways may be such that the shuttle members are translationally displaced only with respect to the holder about a fictitious axis that is parallel to the axis of rotation of the holder.

• – translatorisch um eine fiktive Achse, die parallel zur Drehachse des Halters verläuft, als auch
• – drehbar um den Schwerpunkt des Pendelkörpers bewegt werden, wobei eine derartige Bewegung auch als „kombinierte Bewegung” bezeichnet wird und beispielsweise in der Anmeldung DE 10 2011 086 532 offenbart ist.

Alternatively, the shape of the runways may be such that the pendulum bodies with respect to the holder both:

• - Translational about a fictitious axis that runs parallel to the axis of rotation of the holder, as well
• Be rotatably moved about the center of gravity of the pendulum body, wherein such movement is also referred to as "combined movement" and for example in the application DE 10 2011 086 532 is disclosed.

The device has, for example, several pendulum bodies, for example in a number between two and eight, in particular three or six pendulum bodies. All of these pendulum bodies can be arranged circumferentially in succession. The device can thus have a plurality of planes perpendicular to the axis of rotation, in each of which all pendulum bodies are arranged.

In all the foregoing, the holder may be made in one piece and, for example, completely metallic.

Each pendulum mass can also be completely metallic.

The invention also according to another of its aspects is a component for a motor vehicle transmission system, wherein the component is in particular a double-damping flywheel, a hydrodynamic torque converter or a friction disc with a device for damping torsional vibrations as defined above.

• – eine Abdeckung der Komponente,
• – eine Führungsscheibe der Komponente,
• – eine Phasenscheibe der Komponente oder
• – ein von der Abdeckung, der Führungsscheibe und der Phasenscheibe getrennter Halter.

The holder of the torsional vibration damping device may then be as follows:

• A cover of the component,
• A guide plate of the component,
• A phase slice of the component or
• - A separate from the cover, the guide disc and the phase disc holder.

The invention will be better understood by reading the following description of non-limiting examples of its practice and consideration of the accompanying drawings, in which:

1 schematically shows a torsion damping device according to an embodiment of the invention,

2 shows an exploded view of an axial intermediate position member according to a first embodiment of the invention,

3 the organ to the axial intermediate position 2 shows, when assembled, but prior to its location in the torsional vibration damping device,

4 and 5 show a first variant of the first embodiment of the invention, in which the axial intermediate position member is carried by a mass of a pendulum body,

6 and 7 show a second variant of the first embodiment of the invention, in which the axial intermediate position member is supported by the holder, wherein 9 slightly different from

8th schematically shows a second embodiment of the invention and

10 schematically shows another example of the Torsionsschwingungsdämpfungsvorrichtung, to which the invention can be applied.

In 1 is a damping device 1 represented, to which the invention can be applied. The damping device 1 is of the pendulum oscillator type. The damping device 1 may in particular equip a motor vehicle transmission system and is integrated, for example, in a component, not shown, of such a transmission system, wherein this component is, for example, a double-damping flywheel.

This component may be part of a motor vehicle drive chain, which includes an internal combustion engine, in particular with three or four cylinders.

In 1 is the device 1 at rest.

Such a component may comprise in a known manner a torsional damper having at least one input member, at least one output member and circumferential elastic recovery means disposed between the input and output members. For the purposes of the present application, the terms "input" and "output" are defined relative to the direction of transmission of the torque from the internal combustion engine of the vehicle to the wheels thereof.

• – einen Halter 2, der um eine Achse X drehbeweglich ist, und
• – mehrere Pendelkörper 3, die in Bezug auf den Halter 2 beweglich sind.

In the example considered, the device 1 Following:

• - a holder 2 which is rotatable about an axis X, and
• - several pendulum bodies 3 that in terms of the holder 2 are mobile.

In the example considered, three pendulum bodies 3 provided, which are evenly distributed on the circumference of the axis X.

• – einem Eingangselement des Torsionsdämpfers,
• – einem Ausgangselement oder einem Phasenzwischenelement, das zwischen zwei Federreihen des Dämpfers angeordnet ist, oder
• – einem Element, das drehbar mit einem der vorgenannten Elemente gekoppelt und von diesen verschieden ist, wobei es sich zum Beispiel um einen zur Vorrichtung 1 zugehörigen Halter handelt.

The holder 2 the damping device 1 can consist of:

• An input element of the torsion damper,
• An output element or a phase intermediate element, which is arranged between two spring rows of the damper, or
• - An element which is rotatably coupled to one of the aforementioned elements and different from these, which is for example one to the device 1 associated holder acts.

At the holder 2 in particular, it is a guide pulley, a phase pulley, a cover of the double-damping flywheel, a part of the secondary flywheel or a plate attached to the primary flywheel. The holder 2 is made of metal, here steel. In the example considered, the holder has 2 Overall, the shape of a ring with two opposite sides 4 that are flat surfaces here.

• – zwei Pendelmassen 5, wobei sich jede Pendelmasse 5 axial gegenüber einer Seite 4 des Halters 2 erstreckt, und
• – zwei Verbindungsorgane 6, die die beiden Pendelmassen 5 fest miteinander verbinden.

As in particular in 1 can be seen, in the example considered, each pendulum body 3 Following:

• - two pendulum masses 5 , where each pendulum mass 5 axially opposite to one side 4 of the owner 2 extends, and
• - two connecting organs 6 that the two pendulum masses 5 firmly connect with each other.

Every pendulum mass 5 consists in the considered example of metal. The connecting organs 6 , which are also referred to as "cross struts" are angularly offset in the example considered.

Every connecting organ 6 partially extends into a window 9 formed in the holder. In the example considered, the window defines 9 an empty space inside the holder, this window being of a closed contour 10 is limited.

The device 1 furthermore has rolling elements in the considered example 11 on, which is the displacement of the pendulum body 3 in terms of the holder 2 to lead. At the rolling organs 11 these are rollers in which at least one section has a circular cross-section.

In the example described, the movement of each pendulum body 3 in terms of the holder 2 of two rolling organs 11 guided, each with one of the connecting organs 6 of the pendulum body 3 interact.

Every rolling organ 11 acts on the one hand with a runway 12 together, by the holder 2 defined and here by part of the contour 10 of the window 9 is formed, and on the other hand with a runway 13 coming from the pendulum body 3 defined and here by a part of the outer contour of the connecting member 6 is formed.

Every rolling organ 11 interacts with its relocation in relation to the holder 2 and on the pendulum body 3 at radially inner height with the runway 13 and at radially outer height with the runway 12 by, for example, only between the taxiways 12 and 13 is acted upon by compression. Like in 1 shown, have the runways 12 and 13 in the example described, portions which are radially opposed to each other.

In the examples considered, the device 1 Cushioning organs 25 on. Every connecting organ 6 For example, carries a stopper damping element 25 ,

As in 1 represented, these stopper damper organs 25 as described in the application filed on 14 October 2014 under number 14 59836 in France. As a variant, these Anschlagdämpfungsorgane 25 have the form of a coating, which in a plane orthogonal to the axis of rotation part of the circumference of the connecting member 6 surrounds.

Each stop damper 25 may have axial pins whose ends in one of the pendulum masses 5 are included, so they this stopper damping element 25 with the pendulum masses of a pendulum body 3 firmly connect.

Through these stop damping organs 25 it is possible to dampen the shocks associated with striking the pendulum body 3 on the holder 2 at the end of a shift from rest and regardless of the direction of relocation. Such a displacement takes place in the axis of rotation X orthogonal plane and not axially. The stop damping organs 25 can also allow for an attenuation of the shocks associated with the radial fall of the pendulum body 3 be related at low rotational speeds of the vehicle engine, for example when starting or stopping the vehicle.

It will now be based on the 2 to 8th Embodiments of the invention described in more detail, with which it can be ensured that the axial abutment of a pendulum body 5 on the holder 2 never expresses itself in contact of metal with metal, even if the holder 2 and the pendulum masses 5 in the example considered consist exclusively of metal.

According to the 2 to 7 showing a first embodiment of the invention are between each pendulum mass 5 and the holder 2 organs 30 provided for the axial intermediate position.

Every organ 30 to the axial intermediate position comprises a plastic section 31 and a metal section 32 ,

The plastic section 31 has an end face 33 on, over which the contact between the holder 2 and the pendulum mass 5 completely or partially, if this axially on the holder 2 is in attack. This endface 33 is essentially flat, and a cavity 35 is in this area 33 educated. This cavity 35 then extends from the end face 33 to the interior of the plastic section 31 ,

The endface 33 belongs to a section 34 of the plastic section 31 that is axially between the holder 2 and the pendulum mass 5 lies, if this axially on the holder 2 is in attack.

The metal section 32 is at the 2 to 7 a ball, which consists for example of steel and in the cavity 35 is included.

As in the 2 and 3 shown, the plastic section 31 a part 37 having a substantially circular cross section, in the holder 2 or in the pendulum mass 5 lies, taking the section 34 of the organ 30 to the axial intermediate position across this section 37 extends beyond.

As in the 2 and 3 shown in the wall of the section 37 at the level of the cavity 35 grooves 40 be formed, so that the insertion of the ball 32 in the cavity 35 is simplified. It can also have one or more stiffening ribs 42 in the wall of this section 37 be educated.

As in the 2 and 3 shown, is the plastic section 31 of the organ 30 to the axial intermediate position in a hole 44 mounted in the holder 2 or in the pendulum mass 5 is formed.

In the example of the 4 and 5 is the hole 44 in a pendulum mass 5 educated. It may be a blind hole or not. It can then have several holes 44 in the area of a pendulum mass 5 be formed, which the holder 2 axially opposed, this surface then several organs 30 contributes to the axial intermediate position, which are identical or not.

As in the 4 and 5 can be shown, the clamping of the plastic section 31 in one in a pendulum mass 5 trained hole 44 can only be achieved if the metal ball 32 in the cavity 35 is arranged. In other words, by placing the ball 32 in the cavity 35 the plastic section 31 compressed locally, due to this compression, a jamming of the organ 30 to the axial intermediate position in the hole 44 is obtained.

In a variant, not shown, the clamping of the plastic section 31 in the hole 44 regardless of arranging the ball 32 in the cavity 35 get, with the ball 32 in the cavity 35 is pressed.

As in 5 You can see the dimensions of the metal ball 32 and the cavity 35 be such that this ball 32 with the end face 33 of the plastic section 31 flush closes when the ball 32 in the cavity 35 lies. The axial impact of the pendulum mass 5 on the holder 2 then takes place via a simultaneous investment of the holder 2 both at the end face 33 as well as on the metal ball 32 ,

Every pendulum mass 5 a pendulum body 3 can be on any surface that is one side 4 of the owner 2 axially opposite, as described above organs 30 wear to the axial intermediate position.

The example of 6 and 7 differs from the one just described in particular in that the holes 44 in the holder 2 are formed. Every hole 44 can be continuous while maintaining the full thickness of the holder 2 between two pages 4 be educated.

In this case, the organ 30 for axial intermediate position a plastic section 31 have that in this hole 44 is arranged and extending between two end faces 33 extends. In the example of the 6 and 7 there is no section 34 of the plastic section 31 axially between the holder 2 and the pendulum mass 5 if this is axial on the holder 2 is in attack.

A cavity 35 is then in each endface 33 formed, wherein this cavity has a metal portion 32 receives, which is similar to the previously described in the form of a metal ball.

As in particular in 7 can be seen in this example, the dimensions of the metal ball 32 and the cavity 35 be such that the ball 32 on a stretch d over the end face 33 out of the cavity 35 protrudes as soon as they are in the cavity 35 lies and no axial impact of the pendulum mass 5 on the holder 2 consists.

The plastic material that is the section 31 can then be sufficiently compressible, thus a displacement of the ball 32 in the cavity 35 possible as soon as the pendulum mass 5 axially on the holder 2 is applied.

This shift of the ball 32 to the interior of the plastic section 31 can thus be done before the pendulum mass 5 axially on the holder 2 in abutment, whereby it is possible by this displacement that the metal ball 32 with the endface 33 flush as soon as the pendulum mass 5 axially on the holder 2 is in attack. In this example, therefore, a simultaneous contact with the metal ball 32 and at the end surface 33 before, when the pendulum mass 5 in abutment on the holder 2 is. In this case, there may be a transitional phase prior to axial impact in which there is only one contact over the metal portion and during which the pendulum mass is still displaced axially due to the ongoing compression of the plastic portion with respect to the holder. Once the maximum compression state for the plastic section is reached, the pendulum mass is axially on the holder in abutment, wherein this striking is done via the plastic portion and the metal portion.

In the example of the 6 and 7 is the metal ball 32 for example in the cavity 35 pressed. As a variant, the metal ball 32 in the cavity 35 be attached while maintaining the ability to roll when in the cavity 35 is arranged.

At the in 9 shown variant is an additional element 34 to the plastic section 31 heard, so added that it is axially between the holder 2 and the pendulum mass 5 inserts when these axially on the holder 2 is in attack. Every side 4 of the owner 2 is then with such an additional element 34 Mistake. In this variant, a connection 70 connect two separate elements together in the hole 44 are included and also to the plastic section 31 belong. The connection 70 is for example an adhesive or welded connection. In the variant off 9 is thus the plastic section 31 not integrally formed, but is by the two additional elements 34 and the two elements formed in the hole 44 are arranged one after the other and over the connection 70 connected to each other.

• – mindestens ein Metallvorsprung 50 definiert, der sich axial zur Seite 4 erstreckt, und
• – mindestens ein Kunststoffteil 51 getragen, das sich axial zur Seite 4 erstreckt.

It will now be based on 8th A second embodiment of the invention described. According to this second embodiment is of a surface 53 a pendulum mass 5 that one page 4 axially opposite the holder:

• - At least one metal projection 50 defined, which is axially to the side 4 extends, and
• - At least one plastic part 51 carried axially to the side 4 extends.

In the example considered, the area defines 53 two metal protrusions 50 and carries two separate plastic parts 51 , these plastic parts 51 in between the metal protrusions 50 limited angular range are arranged one after the other. Every metal tab 50 here has the same shape and is near an angle end of the pendulum mass 5 educated.

As in 8th can be seen, here is every metal lead 50 obtained by deep drawing. The formation of a metal ledge 50 on the surface 53 thus corresponds to the presence of a depression 54 on the surface 56 the pendulum mass 5 that the area 53 opposite.

Every surface 53 a pendulum mass 5 axially against one side of the holder 2 can have one or more metal tabs 50 and one or more plastic parts 51 wear.

In 8th that are part of the device 1 For damping torsional vibrations in a new or almost new state, each plastic part extends 51 axially beyond the metal projection. It is indeed in 8th determine that each plastic part 51 over a distance e axially over the metal projections 50 extends beyond.

In a first range of use, zero wear or low wear of the plastic parts 51 corresponds, the axial striking of the pendulum mass 5 on the holder 2 exclusively via the plastic parts 51 because the metal protrusions 50 not with the holder 2 can get in contact.

After a certain wear of the plastic parts 51 takes the axial dimension of the plastic parts to the value of those of the metal projections, so that the axial abutment of the pendulum mass 5 on the holder 2 about the simultaneous investment of the holder 2 both at the end face 33 as well as on the metal ball 32 he follows.

The invention is not limited to the examples just described.

According to the second embodiment, the metal protrusions 50 and the plastic parts 51 on the website 4 of the owner 2 be arranged and move axially to the surface 53 axially opposite a pendulum mass 5 extend.

Furthermore, according to the second example, it is possible that the metal projections do not interfere with the remaining pendulum mass 5 or the rest of the holder 2 are integrally formed, being thereby by adding material, for example, on the holder 2 or on the pendulum mass 5 are attached.

The invention is not further on a device 1 for damping torsional vibrations according to 1 limited and can also be in a like in 10 be shown device for damping torsional vibrations integrated.

The example 10 is different from the one with respect to the 1 to 9 is described, in that the pendulum body 3 and the holder 2 have a different structure.

The window 9 is here radially open to the outside, the outline 10 then no closed line defined.

In the example off 10 are the two pendulum masses 5 over several rivets 60 connected in a leader 62 are included. As in 10 can be seen, this leader piece 62 angled edges 64 whose shape coincides with that of the outline 10 the opening 9 can cooperate to make a stop for the displacement of the pendulum body 3 in terms of the holder 2 to build.

In this example are from the window 9 separate cavities 66 in the holder 2 formed and are substantially axially compared to other cavities 70 in the pendulum masses 5 are formed. Every rolling organ 11 is at the same time in a cavity 66 and in a cavity 70 absorbed, so that the displacement of the pendulum body 3 in terms of the holder 2 to be led.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been 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.

Cited patent literature

• DE 102006028556 [0006]
• DE 102011086532 [0053]

Claims (12)

Contraption ( 1 ) for damping torsional vibrations, comprising: - a holder ( 2 ) which is rotatable about an axis (X), - at least one pendulum body ( 3 ) comprising: a first and a second pendulum mass ( 5 ) axially spaced and relative to the holder ( 2 ) are movable, the first pendulum mass ( 5 ) axially on a first side of the holder ( 2 ) and the second pendulum mass ( 5 ) axially on a second side of the holder ( 2 ) and at least one organ ( 6 ) for connecting the first and the second pendulum mass ( 5 ), which arranges the masses in pairs, whereby the holder ( 2 ) and the pendulum masses ( 5 ) Metal and the device ( 1 ) is designed so that the axial abutment of a pendulum mass ( 5 ) on the holder ( 2 ) never expresses itself exclusively through contact of metal with metal. Device according to claim 1, wherein the holder ( 2 ) or a pendulum mass ( 5 ) an organ for the axial intermediate position ( 30 ), wherein this organ to the axial intermediate position ( 30 ) a plastic section ( 31 ) and a metal section ( 32 ), these sections ( 31 . 32 ) are arranged so that when an axial striking this pendulum mass ( 5 ) on the holder ( 2 ) this axial abutment on the one hand on the plastic portion ( 31 ) of the organ to the axial intermediate position ( 30 ) and on the other hand via the metal section ( 32 ) of the organ to the axial intermediate position ( 30 ) he follows. Device according to claim 2, wherein the metal section ( 32 ) in a cavity ( 35 ) received in the plastic section ( 31 ), this cavity ( 35 ) into an end surface ( 33 ) of the plastic section ( 31 ) and the end surface ( 33 ) striking over the plastic section ( 31 ), when the pendulum mass ( 5 ) axially on the holder ( 2 ) comes to a stop. Device according to claim 3, wherein the dimensions of the metal section ( 32 ) and the cavity ( 35 ) are such that the metal portion ( 32 ) with the end face ( 33 ) of the plastic section ( 31 ) flush when this metal section ( 32 ) in the cavity ( 35 ) is arranged. Device according to claim 3, wherein the dimensions of the metal section ( 32 ) and the cavity ( 35 ) are such that the metal portion ( 32 ) over the end surface ( 33 ) of the plastic section ( 31 ) out of the cavity ( 35 ) protrudes when in the cavity ( 35 ), wherein the plastic section ( 31 ) is sufficiently compressible, so that the metal section ( 32 ) to the interior of the cavity ( 35 ) moves when the pendulum mass ( 5 ) axially on the holder ( 2 ) just before pressing it axially on the holder ( 2 ) comes into abutment, so that the metal section ( 32 ) with the end face ( 33 ) of the plastic section ( 31 ) flush when the pendulum mass ( 5 ) axially on the holder ( 2 ) is in attack. Device according to one of claims 3 to 5, wherein the plastic portion ( 31 ) in a hole ( 44 ) contained in the pendulum mass ( 5 ) or in the holder ( 2 ) is formed, and by arranging the metal portion ( 32 ) in the cavity ( 35 ) a force on the plastic section ( 31 ) is applied, the clamping of this plastic section ( 31 ) in the hole ( 44 ). Device according to one of claims 3 to 5, wherein the metal portion ( 32 ) in the cavity ( 35 ) is pressed. Device according to one of claims 3 to 7, wherein the metal portion ( 32 ) is a ball. Apparatus according to claim 1, wherein one of the pages ( 4 ) of the holder ( 2 ) of an area ( 53 ) one of the pendulum masses ( 5 ) axially opposite and this surface ( 53 ) or this page ( 4 ): - at least one metal projection ( 50 ) defined axially to the axially opposite side ( 4 ) or area ( 53 ), and - at least one plastic part ( 51 ), which extends axially to the axially opposite side ( 4 ) or area ( 53 ). Apparatus according to claim 9, wherein the plastic part ( 51 ) axially over the metal projection ( 50 ) extends. Apparatus according to claim 9, wherein the plastic part ( 51 ) and the metal projection ( 50 ) axially to the same extent ( 4 ) of the holder ( 2 ) or to the surface ( 53 ) of the pendulum mass ( 5 ). Double damping flywheel for a motor vehicle transmission system, with a device for damping torsional vibrations according to one of the preceding claims.

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