DE102016120193A1 - damping device - Google Patents

Abstract

Component (1) for a motor vehicle transmission system, the component comprising: - a torque input element (9), - a torque output element (2), - a damping device (14) with a fixed resonant frequency, wherein the device (14) in the component (1) is integrated, that it is arranged outside the path, which is used by the torque transmitted by the component between the torque input element (9) and the torque output element (2), this device (14) comprising: - a primary component (15) and - a secondary component (25) which is rotatable about an axis (X) with respect to the primary component (15) against a restoring force exerted by at least one elastic restoring member (22), the component (1) also comprising a torque limiter (30), on the one hand with the damping device (14) and on the other hand with the torque input element (9) or the torque output element (2) of the component (1) together acts to ensure the axial retention of the damping device (14) on the component (1).

Description

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

In such an application, the damping device may be incorporated in a torsional damping system of a clutch which may selectively connect the internal combustion engine to the transmission to filter the vibrations due to engine irregularities.

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

In order to filter the torsional vibrations propagating due to the irregularities of the internal combustion engine and / or to filter vibrations generated in the clutch region and occur during the slip phase of the clutch in the drive train of a vehicle, it is known to use a damping device having a resonant frequency which is fixed and independent of the speed of the internal combustion engine, such a device being also called absorber.

The patent application WO 2011/060752 discloses a damper integrated in a friction disc equipped with a torque limiter which allows the damper to be protected when subjected to high rotational speeds. For the purposes of the present patent application, a torque limiter is a component which is designed to exert a frictional force on the damping device, this force holding the primary component of the damping device rotationally fixed to the hub of the disc, as long as the torque applied by this device to the torque limiter is smaller than is a predetermined value.

The absorber after the WO 2011/060752 is held axially on the friction disc by means of a locking ring, which prevents the axial displacement of the absorber away from the friction disc, and also held by means formed in the hub shoulder, which forms a stop which prevents the axial displacement of the absorber to the friction disc. The absorber after the WO 2011/060752 is relatively complex, costly in design and generates a lot of space in the friction plate.

The patent application FR2759135A1 discloses a flywheel-integrated absorber provided with a centrifugal release system. At a lower rotational speed, the absorber is connected to the flywheel. Starting from a defined speed, the absorber is disengaged and turns freely in relation to the flywheel. The decisive criterion for this release system is thus the speed and not the torque. In addition, this absorber is relatively complicated. The centrifugal system requires a large number of elements and is therefore relatively expensive.

There is a need to dampen the torsional vibrations, and / or vibrations generated in the region of the clutch and propagating within a transmission system of a motor vehicle, by means of a low-cost device which is easy to implement and into a component of this transmission system such as a clutch disc to integrate.

• – ein Drehmomentausgangselement,
• – eine Dämpfungsvorrichtung mit fester Resonanzfrequenz, wobei die Vorrichtung so im Bauteil integriert ist, dass sie außerhalb des Weges angeordnet ist, der durch das vom Bauteil übertragenen Drehmoment zwischen dem Drehmomenteingangselement und dem Drehmomentausgangselement benutzt wird, wobei diese Vorrichtung Folgendes umfasst:
• – ein Primärbauteil und
• – ein Sekundärbauteil, das um eine Achse in Bezug auf das Primärbauteil gegen eine von mindestens einem elastischen Rückstellorgan ausgeübte Rückstellkraft drehbeweglich ist,

wobei das Bauteil auch einen Drehmomentbegrenzer umfasst;

• – der so angeordnet ist, dass er eine Reibungskraft ausübt, die eine radial zur Dämpfungsvorrichtung gerichtete Komponente aufweist, wobei diese Kraft diese Vorrichtung mit dem Drehmomenteingangselement oder dem Drehmomentausgangselement des Bauteils drehfest hält, solange das durch die Vorrichtung auf den Drehmomentbegrenzer ausgeübte Drehmoment geringer als ein vorbestimmter Wert ist, und
• – der einerseits mit der Dämpfungsvorrichtung und andererseits mit dem Drehmomenteingangselement oder dem Drehmomentausgangselement des Bauteils zusammenwirkt, so dass das axiale Halten der Dämpfungsvorrichtung auf dem Bauteil gewährleistet ist.

The invention aims to meet this need in whole or in part, and according to a first aspect, it succeeds by means of a component for a transmission system of a motor vehicle, the component comprising:
a torque input element,

• A torque output element,
• A damping device having a fixed resonance frequency, the device being integrated in the component such that it is arranged outside the path which is used by the component-transmitted torque between the torque input element and the torque output element, this device comprising:
• - a primary component and
• A secondary component which is rotatable about an axis with respect to the primary component against a restoring force exerted by at least one elastic return member,

wherein the component also includes a torque limiter;

• - Which is arranged so that it exerts a frictional force having a radially directed to the damping device component, this force rotatably holding this device with the torque input member or the torque output element of the component, as long as the torque applied by the device to the torque limiter torque is less than is predetermined value, and
• - On the one hand cooperates with the damping device and on the other hand with the torque input element or the torque output element of the component, so that the axial retention of the damping device is ensured on the component.

Such a torque limiter not only makes it possible to protect the damping device when it is exposed to high speeds, but also ensures the holding this damping device in the axial position on the component. Thus, a new function is added to the torque limiter, which allows to dispense with the additional necessary parts in the prior art when holding the axial position of the damping device on the component.

The damper device may enable to damp torsional vibrations, for example, those due to the nonuniformities of the internal combustion engine. As a variant or in addition, the damping device may allow to filter the vibrations which are generated in the region of the clutch and occur in the drive train of a vehicle during the slip phase of the clutch, these vibrations also being called "chattering vibrations".

When the axial retention of the damping device on the component takes place via the torque limiter, none of the axial stops uses elastic axial support for the displacement of the damping device, contrary to the teaching of the application WO 2011/060752 with respect to the element ( 17 ) in the 1 For example, this application does not abut the device against a part held axially by an energy store, such as one or more springs.

The damping device has a fixed, independent of the rotational speed of the internal combustion engine resonance frequency. Such a device is also called "absorber" because it is different from a pendulum. The absorber can help eliminate the picking problems.

The resonant frequency of the absorber is, for example, between 6 Hz and 14 Hz, in particular between 8 Hz and 12 Hz. Such a resonant frequency is particularly suitable for eliminating picking problems.

The secondary component acts as a filtering mass. The secondary component may extend primarily radially outward of the primary component. The secondary component can be in one piece.

The primary component is firmly connected, for example, to an element of the component of the transmission system, for example a hub, while the secondary component is then connected to nothing else than to the primary component, this connection taking place via the elastic restoring member or the elastic restoring members.

The elastic return member is, for example, a spring such as a coil spring. It can be a straight or a curved spring.

• – bedeutet „axial” „parallel zur Drehachse”,
• – bedeutet „radial” „senkrecht zur Drehachse und entlang einer Achse, die diese Drehachse schneidet”,
• – bedeutet „orthoradial” „senkrecht zu einer radialen Richtung in einer Ebene senkrecht zur Drehachse”,
• – bedeuten „in Umfangsrichtung” oder „in Winkelrichtung” beide „um die Drehachse herum”,
• – bedeutet der Begriff „zwei Teile sind fest verbunden”, dass sie starr gekoppelt sind, außer wenn explizit dargelegt ist, wie diese Teile fest verbunden sind. Beispielsweise bedeutet „zwei drehfeste Teile” nichts hinsichtlich der Möglichkeit oder nicht Möglichkeit einer translatorischen Bewegung zwischen diesen beiden Teilen, wobei dann beide Optionen möglich sind,
• – bedeutet „die Dämpfungsvorrichtung ist in Ruhestellung”, dass sich diese Vorrichtung in einer Position befindet, in der sie einer zentrifugalen Kraft, jedoch nicht Torsionsschwingungen ausgesetzt ist, wie denjenigen, die aus den Ungleichförmigkeiten des Verbrennungsmotors stammen.
• – bedeutet „axiales Festsetzen” oder „axiales Halten” nicht unbedingt, dass keinerlei axiale Verlagerung erlaubt ist, dies kann aber axiale Verlagerungen innerhalb eines kleinen Verlagerungsbereiches einschließen, da dieser Verlagerungsbereich eingeschränkt ist.

For the purposes of the present application:

• - means "axially""parallel to the axis of rotation",
• Means "radially""perpendicular to the axis of rotation and along an axis which intersects this axis of rotation",
• - "orthoradial" means "perpendicular to a radial direction in a plane perpendicular to the axis of rotation",
• Mean "in the circumferential direction" or "in the angular direction" both "around the rotation axis",
• - The term "two parts are firmly connected" means that they are rigidly coupled except when it is explicitly stated how these parts are firmly connected. For example, "two non-rotatable parts" means nothing with regard to the possibility or possibility of a translatory movement between these two parts, in which case both options are possible,
• - means "the damping device is at rest", that this device is in a position in which it is subjected to a centrifugal force, but not torsional vibrations, such as those originating from the nonuniformities of the internal combustion engine.
• - "Axial setting" or "Axial holding" does not necessarily mean that no axial displacement is allowed, but this may include axial displacements within a small displacement range, since this displacement range is limited.

The torque limiter cooperates, for example, with at least one groove formed in the damping device and with at least one groove formed in the one torque input element or in the one torque output element of the component, so that the axial retention of the damping device on the component is ensured.

• – einen ersten Abschnitt, der im Ganzen oder teilweise in der in der Dämpfungsvorrichtung ausgebildeten Nut aufgenommen und in dieser Nut axial festgesetzt ist, und
• – einen zweiten Abschnitt, der im Ganzen oder teilweise in der im Drehmomenteingangselement oder im Drehmomentausgangselement ausgebildeten Nut aufgenommen und in dieser Nut axial festgesetzt ist.

The torque limiter may thus include:

• - A first portion which is taken in whole or in part in the formed in the damping device groove and axially fixed in this groove, and
• - A second portion which is taken in whole or in part in the formed in the torque input element or in the torque output element groove and axially fixed in this groove.

The second portion of the torque limiter thus experiences that its axial displacement is limited by the groove formed in the torque input element or the torque output element, that is, the displacement of the torque limiter in a first axial direction with respect to the torque input element or the torque output element the groove is blocked beyond a certain position and that this displacement is also blocked in a second axial direction by the groove beyond a further position. In addition, since the damper device is axially fixed by the first portion of the torque limiter, the axial displacement of this damper device with respect to the input member or the output member is restricted, so that this damper mechanism is held axially by the torque limiter on the member. Only the torque limiter and its cooperation with the aforementioned grooves can allow this axial retention on the component, that is, no other means such as a locking ring or an additional shoulder is necessary to obtain this axial holding.

For example, the first portion includes a portion of the radially outer edge of the torque limiter while the second portion includes a portion of the radially inner edge of the torque limiter. The first portion and the second portion may be circumferentially shifted from each other.

Each of the aforementioned grooves may be axially closed at both ends, that is, each groove extends axially between two bottom walls.

• – eine Vielzahl von ersten Abschnitten, die in Umfangsrichtung diskontinuierlich aufeinander folgen und jeweils im Ganzen oder teilweise in der in der Dämpfungsvorrichtung ausgebildeten Nut aufgenommen sind, und
• – eine Vielzahl von zweiten Abschnitten, die in Umfangsrichtung diskontinuierlich aufeinander folgen und jeweils im Ganzen oder teilweise in der im Drehmomenteingangselement oder im Drehmomentausgangselement ausgebildeten Nut aufgenommen sind,

wobei jeder erste Abschnitt des Drehmomentbegrenzers in Umfangsrichtung zwischen zwei zweiten Abschnitten dieses Drehmomentbegrenzers enthalten ist.By way of example, the torque limiter includes:

• - A plurality of first portions which follow each other discontinuously in the circumferential direction and are each received in whole or in part in the formed in the damping device groove, and
• A plurality of second sections which follow one another discontinuously in the circumferential direction and are accommodated in whole or in part in the groove formed in the torque input element or in the torque output element,

wherein each first portion of the torque limiter is contained circumferentially between two second portions of this torque limiter.

In this example, a single formed in the damping device over 360 ° about the axis of rotation of the secondary component groove with all first portions of the torque limiter, and a single, formed in the torque input element or in the torque output element over 360 ° about the axis of rotation of the secondary component groove can with all the second Collaborate sections of the torque limiter.

As a variant, a plurality of circumferentially successive different grooves may be formed in the damping device, each of these grooves cooperating with one or more first portions of the torque limiter, and / or a plurality of circumferentially successive different grooves may be formed in the torque input member or in the torque output member of the component. wherein each of these grooves cooperate with one or more second portions of the torque limiter.

The groove or grooves formed in the damping device may or may be formed in the primary component.

The primary component comprises, for example, two different parts fixedly connected to one another, a portion of the groove formed in the damping device being defined by one of these parts, and the other portion of the groove formed in the damping device being defined by the other of these parts of the primary component. For example, one of the parts of the primary part defines a bottom wall and the axial part of the groove, while the other part of the primary part defines the other bottom wall of the groove

For example, one torque input element or element includes a hub, and the torque limiter may be arranged to have a frictional force with a component directed toward the damper device, which force rotatably holds this device connected to the hub, as long as that provided by the damper device Torque applied to the torque limiter is smaller than a predetermined value, and the torque limiter cooperates on the one hand with the damping device and on the other hand with the hub, so that the axial retention of the damping device is ensured on the component.

In this case, the groove formed in the torque input member or in the torque output member may be formed in the radially outer surface of the hub, which is radially opposed to the torque limiter.

The hub belongs in particular to the torque output element.

With a torque limiter according to the invention, the secondary component can oscillate with respect to the primary element, as long as the above-mentioned frictional force holds the primary component rotationally fixed to the hub. In addition to the predetermined torque value, the damping device slips with respect to the hub and guides it the energy associated with the torque to which the hub is exposed. The predetermined torque value, beyond which the slippage of the damping device takes place, is for example between 4 Nm and 8 Nm and is for example of the order of magnitude of 5 Nm.

The torque limiter may be arranged to exert a frictional force only radially on the damping device. The torque limiter may then be a shroud disposed radially between the primary component of the damper device and the hub and non-rotatably connecting the two as long as the torque applied to the torque limiter by the damper device is less than the predetermined value.

The torque limiter can be formed by an elastically deformable washer. In the free state, this dish washer may have a square-like shape, which shape is changed when the disc is inserted between the hub and the damping device. Then, the disc may have a corrugated shape, which can successively contact on the one hand with the hub and on the other hand with the primary component in a displacement in the circumferential direction in contact.

The disc can be made of spring steel, for example, C67S. The elastic disc may optionally be slotted.

• – ein Primärbauteil und
• – ein Sekundärbauteil, das um eine Achse in Bezug auf das Primärbauteil gegen eine von mindestens einem elastischen Rückstellorgan ausgeübte Rückstellkraft drehbeweglich ist,

wobei sich das elastische Rückstellorgan in Umfangsrichtung zwischen zwei Enden erstreckt, und jedes Umfangsrichtungsende dieses elastischen Rückstellorgans axial nacheinander Folgendes aufweist:

• – einen ersten axialen Abschnitt, der mit dem einen Primärbauteil oder mit dem einen Sekundärbauteil in Kontakt gelangen kann,
• – einen zweiten axialen Abschnitt, der mit dem anderen Primärbauteil oder mit dem anderen Sekundärbauteil in Kontakt gelangen kann.

According to a second aspect, which can be considered independently or combined with the above first aspect, the invention relates to a damping device with a fixed resonance frequency, wherein the device can be integrated into a component of a transmission system of a vehicle so that it is arranged outside the path, used by the torque transmitted by the component, the apparatus comprising:

• - a primary component and
• A secondary component which is rotatable about an axis with respect to the primary component against a restoring force exerted by at least one elastic return member,

wherein the elastic return member extends in the circumferential direction between two ends, and each circumferential direction end of this elastic return member axially successively comprises

• A first axial section that can come into contact with the one primary component or with the one secondary component,
• - A second axial portion which can come into contact with the other primary component or with the other secondary component.

In such a damping device, the elastic return member can successively axially contact with the primary component and the secondary component in contact. Thus, there is no end of this elastic return member having a radially inner portion in contact with either one primary member or the one secondary member and a radially outer portion in contact with the other of these members, as opposed to what for example in the application DE 10 2011 080 447 is disclosed. It is therefore not necessary to resort to a centering, such as in the DE 10 2011 080 447 to take the elastic return member. Thus, the number of components of the device is reduced, but without affecting its Filtrierleistungen.

When the secondary member rotatively displaces with respect to the primary member, a circumferential direction end of the elastic return member is entrained over the portion of that end which contacts the secondary member, while the other circumferential direction end of the elastic return member is stopped over the portion of that end which coincides with the primary component comes into contact.

• – den ersten axialen Abschnitt, der mit dem einen Primärbauteil oder mit dem einen Sekundärbauteil in Kontakt gelangen kann,
• – den zweiten axialen Abschnitt, der mit dem anderen Primärbauteil oder mit dem anderen Sekundärbauteil in Kontakt gelangen kann,
• – einen dritten axialen Abschnitt, der mit dem Bauteil in Kontakt gelangen kann, mit welchem der erste axiale Abschnitt in Kontakt gelangen kann.

Each circumferential direction end of the elastic return member has in particular axially one behind the other:

• The first axial section which can come into contact with the one primary component or with the one secondary component,
• The second axial section which can come into contact with the other primary component or with the other secondary component,
• - A third axial portion which can come into contact with the component, with which the first axial portion can come into contact.

In other words, the second portion is clamped axially between two portions of the circumferential direction end of the elastic return member, which can each come into contact with the same component of the damping device with which this second portion does not come into contact.

The first and third portions of the angular end of the elastic return member may come into contact with the primary component and the secondary component, respectively, while the second portion of the end of the elastic return member may come into contact with the primary component and the secondary component of the damping device, respectively.

The primary component may comprise two different parts, wherein one of these parts of the primary component has a receptacle which the elastic return member receives, so that the first axial portion of a circumferential direction end of the elastic return member can come into contact with one of the edges in the circumferential direction of this recording, and the other of these parts of the primary component has a receptacle which receives the elastic return member, so that the third axial Section of a circumferential direction end of the elastic return member can come into contact with one of the circumferential direction edges of this recording. The wall of each receptacle, against which one of the ends can come into contact in the circumferential direction of the elastic return member, extends only to a part of the axial dimension of this circumferential direction end of the elastic return member.

The receptacle formed in one of the parts of the primary component and the receptacle formed in the other part of the primary component can lie exactly axially on one another.

The two parts of the primary component may be firmly joined together by any means, such as by snapping, crimping or heat shrinking. These two parts can be axially behind each other.

Each receptacle formed in the primary member may extend circumferentially between two planar edges, each of which edges may contact a portion of a circumferential direction end of the elastic return member. Each receptacle can open axially into the other receptacle and have a bottom wall. This bottom wall has in particular a curved shape when the elastic return member is a spiral spring.

Between two recordings formed in the primary component, viewed in the circumferential direction, at least one radial nose can be formed. This nose, for example, extends radially to a dimension that is smaller than the radial dimension of the receptacles.

The secondary member may include a receptacle configured to receive the resilient return member such that the second axial portion of a circumferential direction end of the resilient return member may contact one of the circumferential direction edges of that receptacle. This receptacle thus extends in the circumferential direction between two edges, wherein each of these edges can come into contact with the second portion of one end of the elastic return member. Each of these circumferential direction edges defines, for example, a pin which projects into the receptacle formed in the secondary component, wherein this pin can penetrate into the elastic return element, for example. This receptacle can be axially open, that is, it has no bottom wall in the axial direction.

Each receptacle of the secondary component, which receives an elastic return element, can be formed in the radially inner edge of this secondary component.

Between two receptacles of the secondary component, which receive an elastic return member, seen in the circumferential direction, a receptacle without elastic return member may be formed in the secondary component. An abovementioned radial nose can then cooperate with one of these empty receptacles during the rotation of the secondary component with respect to the primary component.

When the device is in the rest position, the elastic return member at each of its circumferential direction ends can come into contact both with the two parts of the primary component and with the secondary component.

The second portion of a circumferential direction end of the resilient return member may represent at least 50% of the axial dimension of that end, while each of the first and third portions of that end then represents less than 25% of the axial dimension of that end. According to the first and second aspects of the invention mentioned above, each of the primary and secondary components is made of plastic or zamak, for example.

Furthermore, according to the first or second aspect of the invention, the damping device may include a plurality of elastic return members disposed between the primary member and the secondary member so as to generate the elastic restoring force opposing the rotation of the secondary member with respect to the primary member. These elastic return organs are then connected in parallel.

Each elastic return member may extend between two circumferential direction ends, and each of these circumferential direction ends may include first, second, and optionally third portions as previously described.

In all of the foregoing, the apparatus may include a system for generating the hysteresis for the displacement of the secondary component with respect to the primary component.

For example, the system for generating the hysteresis exerts a torque between 0.1 Nm and 2 Nm on the secondary component, the maximum torque value of the hysteresis being obtained, when the secondary component rotates with respect to the primary component by an angular amount equal to the amplitude of its rotational movement.

The applied hysteresis torque may be constant or variable. For example, the hysteresis torque is initially variable and then constant as the secondary component rotates relative to the primary component.

If the hysteresis torque is not constant, the hysteresis generating system may use at least one ramp that interacts with at least one counter ramp when the secondary member rotates relative to the primary component. The ramp can be firmly connected to the primary component while the counter ramp is firmly connected to the secondary component. The ramp and the counter ramp can be offset axially.

The ramp and the counter ramp can have the same angle.

According to a specific example for carrying out the invention, the hysteresis torque exerted with respect to the primary component during the rotation of the secondary component may initially be increasing, then constant. For this purpose, the or each ramp may be adjacent to a disc, and the or each counter-ramp may also be adjacent to a disc. When a ramp and a counter ramp interact by friction, an increasing hysteresis torque is applied to the secondary component while the hysteresis torque is constant when both discs interact by friction.

The ramp may be carried by the primary component, for example by being formed in the surface of one of the two parts of this primary component, or by a coating applied to the surface of a part of the primary component.

Optionally, a plurality of circumferentially consecutive ramps may be formed in the primary component. These ramps can all have the same shape.

The counter-ramp may be formed in a separate from the secondary component but rotatably connected thereto component and optionally also axially with respect to the secondary component.

The counter-ramp is supported for example by an axially offset to the secondary component and fixedly connected to this secondary component, the component having a portion which is in contact with the primary component. The component can be elastically deformable. The component includes, for example, a radially outer portion which is fixedly connected to the secondary component and a radially inner portion which is in contact with the primary component.

The radially outer portion of the component extends, for example, continuously about the axis of rotation and in particular radially between a circular radially inner edge and a circular radially outer edge. The radially inner portion of this component may comprise one or more carriers. Viewed in a plane perpendicular to the axis of rotation of the device, each carrier may be U-shaped. Each carrier then has two arms, each arm starting at the radially inner edge of the radially outer portion of the component, and both arms being connected by a connecting part which then carries the counter-ramp. The latter can be formed directly in the connection part or via a coating applied to this connection part.

Optionally, a plurality of circumferentially successive counter-ramps may be provided in the component. These counter ramps can all have the same shape.

In all of the foregoing, the number of counter ramps may be equal to the number of ramps. This number is for example between two and six and is for example equal to four. There are then four ramps and four counter ramps.

In all the foregoing, each ramp may protrude towards the ramp and in particular have a convex profile, while each counter ramp then has a concave profile. The reverse is possible, with each counter-ramp then projecting towards the ramp, each counter-ramp in particular having a convex profile, while each ramp then has a concave profile.

In all of the foregoing, the ramp or ramps and the counter ramp or counter ramps may be located radially inward of the secondary component, that is, they are at a radial distance of the axis of rotation that is less than the smallest radial distance between the secondary component and the axis of rotation ,

Holes may be formed in the radially outer portion of the component, which holes may receive means for fixed connection with the secondary component, for example rivets.

The carriers can be evenly distributed around the axis of rotation.

• – mindestens einen Reibbelag, der einen Drehmomenteingang definiert,
• – eine Nabe, die um die Drehachse des Sekundärbauteils drehbeweglich ist und einen Drehmomentausgang definiert,
• – die Dämpfungsvorrichtung wie oben definiert, die von der Nabe getragen und außerhalb des Weges angeordnet ist, der von dem durch die Scheibe zwischen dem Drehmomenteingang und dem Drehmomentausgang übertragenen Drehmoment benutzt wird.

The invention also relates to a friction disc for a clutch, comprising:

• At least one friction lining defining a torque input,
• A hub which is rotatable about the axis of rotation of the secondary component and defines a torque output,
• - The damping device as defined above, which is supported by the hub and disposed outside the path, which is used by the torque transmitted through the disc between the torque input and the torque output.

The friction disc may be free from any torsional vibration damping device other than the aforementioned damper device or "absorber device", in which case the friction lining or linings are fixed to the hub.

In a variant, the friction lining or the friction linings are rotatable with respect to the hub, and a torsional vibration damping device other than the aforementioned damping device is provided and disposed between the friction lining or friction linings and the hub. This torsional vibration damping device then counteracts the rotation of the friction lining or the friction linings with respect to the hub. The torsional vibration damping device comprises, for example, a plurality of springs. In such a case, the torque limiter of the friction disc is preferably a torque limiter that acts exclusively radially as described above.

The damping device according to the invention can also be integrated into other components as a friction disc for a clutch, for example, in a two-mass damping flywheel or a hydrodynamic torque converter.

The invention will be better understood upon reading the following description of a non-limiting example for carrying out this invention and upon considering the attached drawings, which show:

1 A view of a friction disc comprising a damping device according to an embodiment of the invention,

2 - The damping device of 1 in an exploded view,

3 and 4 respectively sectional views according to AA and BB of 1 .

5 a detail of 1 , wherein some elements of the figure are shown transparent,

6 and 7 axial sectional views of the representation of 5 .

8th a view similar to 2 , a friction disc with a damping device according to a second embodiment of the invention,

9 a view of the damping device of 8th , which is put together and shown standing alone,

10 a sectional view according to XX of 9 , and

11 and 12 Details of the device 9 When the device is at rest or a torsional vibration or vibration is filtered by the device.

In the 1 is a front view of a friction disc 1 for a clutch of a transmission system of a motor vehicle. This friction disc 1 has a hub in the example considered 2 on, the unillustrated shaft of a transmission by means of grooves 3 to drive an axis X in rotation.

The friction disc 1 has a Reibbelagträger 6 on, who also in the 3 and 4 good to see. In the example considered, the carrier is 6 several parts. It includes a flange 7 which is radially from the hub 2 extends, and a plate 8th that the friction linings 9 wearing. The plate 8th is here at the flange 7 through in 3 visible rivets 5 attached. The plate 8th extends mainly radially outward with respect to the flange 7 , A variety of cutouts with the same shape, in the plate 8th are formed, follow each other, for example, about the axis X.

The friction linings 9 thus define a torque input for the friction disc while the hub 2 a torque output for the disc 1 Are defined.

As in particular in the 3 and 4 is better to see here is the friction lining 6 with the hub 2 firmly connected, that is, the disc 1 is free of a torsional vibration damping device, which is arranged on the way, the torque between the torque input and the torque output in the disc 1 is used.

As a variant and although not shown, such a Torsionsschwingungsdämpfungsvorrichtung, between the hub 2 and the carrier 6 is arranged to be present, this damping device, for example, a variety of springs, which allow a portion of the torsional vibrations between the friction linings 9 and the hub 2 to dampen.

The friction disc 1 also includes a damping device 14 , The device 14 here is a absorber, meaning that it is out of the way of using the torque that drives the disc 1 from the friction linings 9 to the hub 2 transmits, and that it has a fixed resonance frequency, which is independent of the rotational speed of the internal combustion engine of the vehicle. The resonant frequency of the absorber 14 is in the example considered between 8 Hz and 14 Hz.

In the example considered, the absorber 14 a primary component 15 on, around the hub 2 is arranged. In the considered example is between this component 15 and the hub 2 formed a radial distance, as in the 3 and 4 you can see.

In the example described, there is the primary component 15 from two parts 16 and 17 , which are firmly connected by snap together and follow each other axially along the axis X successively. The part 17 of the primary component 15 is the one who has the friction linings 9 is closest.

As will be seen in more detail later in each part 16 and 17 of the primary component 15 Recordings defined to elastic return organs 22 which are just spiral springs here. In the example considered are three springs 22 intended. The only spring, the whole of the springs 22 of the Tilgers 14 has, for example, an angle stiffness coefficient between 0.02 Nm / ° and 0.15 Nm / °.

These feathers 22 are between the primary component 15 and a secondary component 25 inserted, the latter forming a filter mass. As shown in the figures, the secondary component extends 25 mainly radially outward with respect to the primary component 15 , The secondary component 25 defines a mass, for example, has an inertia between 0.0005 kg · m ² and 0.002 kg · m ² .

The secondary component 25 is in relation to the primary component 15 rotatable about the axis X, the springs 22 this rotation of the secondary component 25 counteract by limiting the rash. The rotational amplitude of the secondary component 25 in relation to the primary component 15 is in the example considered between 14 ° and 18 °.

The friction disc 1 of the example described also includes a torque limiter 30 , The torque limiter 30 Here is an elastically deformable disc, which is introduced into the radial gap. As in particular in the 5 can be seen, has the elastically deformable disc 30 a slot 31 on. After its introduction into the radial gap, the elastically deformable disc has 30 successively in the circumferential direction a change of first sections 33 that with the primary component 15 of the Tilgers 14 get in touch, and from second sections 34 on that with the hub 2 get in touch. Every first section 33 includes a portion of the radially outer edge of the torque limiter 30 while every other section 34 a portion of the radially inner edge of the torque limiter 30 includes.

In the considered example are in the wall of the hub 2 and in the wall of the primary component 15 of the Tilgers 14 Formed grooves. The interaction of the torque limiter 30 Therefore, with these grooves forms a system for axially holding the primary component 15 and thus the Tilgers 14 on the hub 2 ,

In the example described, one and the same groove 37 in the radially outer wall of the hub 2 formed, and this groove extends 360 ° about the axis of rotation X. This groove 37 then takes all second sections 34 of the torque limiter. Similarly, in the example described, one and the same groove 38 in the primary component 15 formed of the absorber, and this groove 38 which extends 360 ° about the axis of rotation X, then takes all first sections 33 of the torque limiter.

In the example shown, each groove 37 and 38 closed at its axial ends by a bottom wall.

More specifically, in the 6 and 7 found that the groove 38 in every part 17 and 17 of the primary component 15 of the Tilgers 14 is trained. You can now see that part 17 of the primary component of the absorber 14 thus a bottom wall 39 the groove 38 and the axial part 40 this groove 38 forms while the part 16 of the primary component 15 the other bottom wall 41 the groove 38 forms. The primary component 14 is thus in relation to the hub 2 via the torque limiter 30 fixed axially.

As long as that on the absorber 14 applied torque is smaller than a predetermined value, for example, between 4 Nm and 8 Nm, exercises the torque limiter 30 a radial frictional force, which is the primary component 15 of the Tilgers 14 with the hub 2 firmly connected. The torque limiter 30 is designed here to be radial only to the absorber 14 to act, that is, the frictional force that he exerted on the primary component 15 of the Tilgers 15 is free of a component that is other than the radial component.

If that's on the absorber 14 applied torque, however, is too large, for example if the absorber 14 is excited to its resonant frequency, that of him on the torque limiter 30 applied torque the predetermined value. The primary component 15 of the Tilgers 14 then slips in relation to the hub 2 what makes possible in the absorber 14 derive generated energy and thus protect it.

In the example described, the absorber comprises 14 nor a system for generating the hysteresis for the displacement of the secondary component 25 in relation to the primary component 15 , This system for generating the hysteresis uses, among other things, an elastically deformable part 50 which will now be described.

• – einen scheibenförmigen, radial äußeren Abschnitt 51, der sich kontinuierlich um die Achse X erstreckt, und
• – einen radial inneren Abschnitt 52, der sich diskontinuierlich um die Achse X erstreckt.

This elastically deformable part 50 is with the secondary component 25 firmly connected and includes:

• - A disc-shaped, radially outer portion 51 which extends continuously around the axis X, and
• - a radially inner portion 52 which extends discontinuously about the axis X.

The radially inner section 52 here includes several carriers 54 , which is radially inward, that is to the axis X, starting from the radially outer portion 51 the disc 50 protrude. In the example described are three carriers 54 evenly distributed around the axis X.

As in particular in 3 shown, comes the part 50 with its radially inner portion 52 about the carriers 54 against the primary component 15 of the Tilgers 14 in Appendix. As in 1 can be seen, in the example considered, the radially outer portion 51 the disc 50 a circular radially outer edge 56 and a circular radially inner edge 57 on. A lot of holes 58 are in this section 51 at the height of each carrier 54 educated. Each of these holes 48 takes a means 59 for attaching the disc 50 with the secondary component 25 of the Tilgers 14 on, like in 2 is shown for example. The fasteners 59 are for example rivets.

As shown, every carrier 54 Be U-shaped when viewed parallel to X axis. Every carrier 54 thus has two arms 62 on, with each arm 62 at the radial inner edge 57 the radially outer portion 51 of the part 50 starts, and where the two arms 62 through a connecting part 63 connected, then a Gegenrampe 64 wearing. The latter can be directly in the connecting part 63 or be formed over a coating applied to this connection part. Each connection part 63 thus carries a counter ramp 64 , so that in the example described three counter-ramps through the part 50 be worn.

These counter ramps 64 interact with ramps 70 which will now be described. In the example considered are the ramps 70 on the surface of the part 16 of the primary component 15 opposite the part 50 educated. As in 2 There are three ramps here 70 intended. According to this example, each counter ramp stands 64 in the direction of the ramp 70 in front of which it cooperates, in particular having a convex profile, while each ramp then has a concave profile.

Now, the manner in which a variable hysteresis torque is generated by the system for generating the hysteresis in the rotation of the secondary component will be described 25 in relation to the primary component 15 of the Tilgers 14 can be generated.

During the rotation of the secondary component 25 of the Tilgers 14 in relation to the primary component 15 , practices the primary component 15 a variable friction torque or hysteresis torque on the secondary component 25 over the ramps 70 out, who are the counter ramps 64 with the secondary component 25 firmly connected part 50 deform. The shapes of the ramps and counter ramps are selected, for example, so that the hysteresis torque is maximum when the secondary component 25 in relation to the primary component 15 shifted according to its rotational amplitude. This maximum value of the hysteresis torque is for example of the order of magnitude of 2 Nm.

With reference to the 8th to 12 Now, a second embodiment of the invention will be described.

According to this second example, the system for axially holding the primary component 15 of the Tilgers 14 on the hub 2 be different, as it is not the torque limiter 30 used, but for example, a retaining ring having an axial stop for the displacement of the primary component 15 away from the friction lining 9 forms, and a shoulder of the hub 2 used, which has an axial stop for the axial displacement of the primary component 15 in the direction of the friction lining 9 forms.

According to this second embodiment, the cooperation between the springs 22 and in the primary component 15 and secondary component 25 of the Tilgers 14 trained shots 20 the way it is with respect to the 10 to 12 is described. In the 11 and 12 is the part 16 of the primary component 15 of the Tilgers 14 shown transparently.

Recordings 20 are in the part 16 of the primary component 15 , in part 17 this primary component 15 and in the secondary component 25 educated.

As in 10 For example, each flows into the primary component 15 trained recording 20 on one side axially in the direction of the secondary component 25 , and this shot is blind on the other side, as it passes through a bottom wall 75 is closed. This bottom wall 75 here is curved, as they are essentially the same shape as the spring 22 Has.

Each in a part of the primary component 15 of the Tilgers 14 trained recording 20 extends in the circumferential direction between two flat edges 76 where each of these edges 76 a stop for the displacement in the circumferential direction in this recording 20 recorded spring 22 can form.

Each in the secondary component 25 trained recording 20 is here axially open and opens on each side in the direction of a recording 20 that in one part 16 or 17 of the primary component 15 is trained. Each of these recordings extends in the circumferential direction between two edges 77 where each of these edges 77 a stop for the displacement in the angular direction of the spring 22 forms. Every edge 77 one in the secondary component 25 trained recording 20 defined in the example described a pin 80 in the recording 20 protruding, with this pin in the spring 22 can penetrate. As in 8th shown, between two consecutive in the secondary component 25 trained and a spring 22 taking pictures 20 be formed a receptacle which is free of spring 22 is.

The arrangement and axial superimposition of the different, in the parts 16 and 17 of the primary component 15 and in the secondary component 25 trained shots 20 can allow that when the absorber 14 as in 11 at rest, the circumferential direction ends of each spring on the one hand with an edge 76 of the part 16 of the primary component 15 , with a border 77 of the secondary component 25 and with a border 76 of the part 17 get in contact with the primary component.

• – einen ersten axialen Abschnitt 85, der dann mit dem Teil 17 des Primärbauteils 15 in Kontakt gelangt,
• – einen zweiten axialen Abschnitt 86, der dann mit dem Sekundärbauteil 25 in Kontakt gelangt, und
• – einen dritten axialen Abschnitt 77, der mit dem Teil 16 des Primärbauteils 15 in Kontakt gelangen kann.

In other words, each end of the spring 22 successively axially in this rest position the following:

• A first axial section 85 who then with the part 17 of the primary component 15 get in touch,
• - a second axial section 86 that then with the secondary component 25 get in touch, and
• - a third axial section 77 that with the part 16 of the primary component 15 can get in contact.

As in particular in 10 can be seen, the second section makes 86 a circumferential direction end of the spring 22 for example, about 50% of the axial dimension of this end of the spring 22 off while each of the first 85 and third 87 Sections of this end make up about 25% of this axial dimension.

As in 12 is visible, if the secondary component 25 rotating about the axis X with respect to the primary component 15 is a circumferential direction end of the spring 22 about his second section 86 through the secondary component 25 taken along, while the other circumferential direction end of this spring 22 about his first 85 and second 87 Sections through the primary component 15 is stopped.

The invention is not limited to the example just described.

The absorber 14 according to the invention can also be assigned to other components of a transmission system as a friction disc for a clutch, such as a hydrodynamic torque converter or a dual mass damping flywheel or a primary inertia such as a flywheel.

The interaction between the springs 22 and in the primary component 15 and in the secondary component 25 of the Tilgers 14 trained shots 20 , as with respect to the 8th to 12 can also be described with reference to the 1 to 7 described friction disc can be applied.

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

• WO 2011/060752 [0005, 0006, 0006, 0012]
• FR 2759135 A1 [0007]
• DE 102011080447 [0037, 0037]

Claims (11)

Component ( 1 ) for a motor vehicle transmission system, the component comprising: - a torque input element ( 9 ), - a torque output element ( 2 ), - a damping device ( 14 ) having a fixed resonance frequency, wherein the device ( 14 ) is so integrated in the component, that it is arranged outside the path, which by the torque between the torque input element ( 9 ) and the torque output element ( 2 ), this device ( 14 ) comprises: - a primary component ( 15 ) and - a secondary component ( 25 ) about an axis (X) with respect to the primary component (FIG. 15 ) against one of at least one elastic return member ( 22 ) is rotationally movable, wherein the component ( 1 ) also a torque limiter ( 30 ); - which is arranged so that a frictional force is applied, which is a radial to the damping device ( 14 ) directed component, said force this device ( 14 ) with the torque input element ( 9 ) or the torque output element ( 2 ) of the component ( 1 ) rotatably as long as that through the device ( 14 ) on the torque limiter ( 30 ) is less than a predetermined value, and - on the one hand with the damping device ( 14 ) and on the other hand with the torque input element ( 9 ) or the torque output element ( 2 ) of the component ( 1 ) cooperates to the axial holding of the damping device ( 14 ) on the component ( 1 ) to ensure. Component according to Claim 1, in which the torque limiter ( 30 ) with at least one in the damping device ( 14 ) formed groove ( 38 ) and at least one in the one torque input element ( 9 ) or in which a torque output element ( 2 ) formed groove ( 37 ) cooperates to the axial holding of the damping device ( 14 ) on the component ( 1 ) to ensure. Component according to Claim 2, in which the torque limiter ( 30 ) Comprises: - a first section ( 33 ), which in whole or in part in the in the damping device ( 14 ) formed groove ( 38 ) and in this groove ( 38 ) is axially fixed, and - a second section ( 34 ), which in whole or in part in the torque input element ( 9 ) or in the torque output element ( 2 ) formed groove ( 37 ) and in this groove ( 37 ) is axially fixed. Component according to Claim 3, in which the torque limiter ( 30 ) Comprises: a plurality of first sections ( 33 ), which follow each other discontinuously in the circumferential direction and in each case in whole or in part in the damping device ( 14 ) formed groove ( 38 ), and - a plurality of second sections ( 34 ), which follow each other discontinuously in the circumferential direction and in each case in whole or in part in the in the torque input element ( 9 ) or in the torque output element ( 2 ) formed groove ( 37 ), each first section ( 33 ) of the torque limiter ( 30 ) in the circumferential direction between two second sections ( 34 ) this torque limiter ( 30 ) is included. Component according to one of Claims 2 to 4, in which the primary component ( 15 ) two different, firmly connected parts ( 16 . 17 ), one share ( 39 . 40 ) in the damping device ( 14 ) formed groove ( 38 ) by one of these parts ( 16 . 17 ) and the other part ( 41 ) in the damping device ( 14 ) formed groove ( 38 ) through the other of these parts ( 16 . 17 ) of the primary component ( 15 ) is defined. Component according to one of the preceding claims, wherein each circumferential direction end of the elastic return member ( 22 ) in axial succession comprises: - a first axial section ( 85 ) connected to the one primary component ( 15 ) or with the one secondary component ( 25 ), - a second axial section ( 86 ) connected to the other primary component ( 15 ) or with the other secondary component ( 25 ), - a third axial section ( 87 ) connected to the component ( 15 . 25 ), with which the first axial section ( 85 ) can come into contact. Component according to one of the preceding claims, in which the one torque input element ( 9 ) or a torque output element ( 2 ) has a hub, and wherein the torque limiter ( 30 ) is arranged so that it exerts a frictional force, which a radially on the damping device ( 14 ) directed component, said force this device ( 14 ) rotatably with the hub, as long as by the damping device ( 14 ) on the torque limiter ( 30 ) torque is less than a predetermined value, and in which the torque limiter ( 30 ) on the one hand with the damping device ( 14 ) and on the other hand cooperates with the hub, to the axial holding of the damping device ( 14 ) on the component ( 1 ) to ensure. Component according to Claims 2 and 7, in which the components in the torque input element ( 9 ) or im Torque output element ( 2 ) formed groove ( 37 ) is formed in the radially outer surface of the hub, which is radially opposite the torque limiter ( 30 ) lies. Device according to Claim 7 or 8, in which the hub is in the torque output element (10). 2 ) belongs. Component according to one of the preceding claims, comprising a system for generating the hysteresis ( 64 . 70 ) for relocating the secondary component ( 25 ) with respect to the primary component ( 15 ), wherein the system for generating the hysteresis in particular at least one ramp ( 70 ) associated with the primary component ( 15 ) and in particular is supported by the primary component, and at least one counter ramp ( 64 ) associated with the secondary component ( 25 ), in particular by a part ( 50 ), which is fixedly connected to the secondary component, wherein the ramp ( 70 ) and the counter ramp ( 64 ) preferably by friction during the rotation of the secondary component ( 25 ) with respect to the primary component ( 15 ) interact. Component ( 1 ) according to one of the preceding claims, which is a friction disc for a clutch, wherein the torque input element at least one friction lining ( 9 ) and the torque output element about the axis of rotation (X) of the secondary component ( 25 ) rotatable hub ( 2 ).

Images