WO2018001779A1 - Pressure plate for a friction clutch mechanism and use thereof in a friction clutch mechanism for a motor vehicle - Google Patents

Pressure plate for a friction clutch mechanism and use thereof in a friction clutch mechanism for a motor vehicle Download PDF

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Publication number
WO2018001779A1
WO2018001779A1 PCT/EP2017/064953 EP2017064953W WO2018001779A1 WO 2018001779 A1 WO2018001779 A1 WO 2018001779A1 EP 2017064953 W EP2017064953 W EP 2017064953W WO 2018001779 A1 WO2018001779 A1 WO 2018001779A1
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WO
WIPO (PCT)
Prior art keywords
pressure plate
ring
weights
plate according
clutch mechanism
Prior art date
Application number
PCT/EP2017/064953
Other languages
French (fr)
Inventor
Pascale Brassart
Olivier Marechal
Eric Rumeau
Original Assignee
Valeo Embrayages
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valeo Embrayages filed Critical Valeo Embrayages
Priority to CN201780047170.7A priority Critical patent/CN109563886B/en
Publication of WO2018001779A1 publication Critical patent/WO2018001779A1/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D13/00Friction clutches
    • F16D13/58Details
    • F16D13/70Pressure members, e.g. pressure plates, for clutch-plates or lamellae; Guiding arrangements for pressure members
    • F16D13/71Pressure members, e.g. pressure plates, for clutch-plates or lamellae; Guiding arrangements for pressure members in which the clutching pressure is produced by springs only
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2300/00Special features for couplings or clutches
    • F16D2300/22Vibration damping

Definitions

  • the invention relates to a friction clutch mechanism for a motor vehicle.
  • the invention relates to an improvement of the pressure plate of a friction clutch mechanism.
  • Clutches concerned by the invention comprise, firstly, a disc friction assembly mounted on the input shaft of the gearbox and, secondly, a rotary mechanism with components to symmetry of revolution around an axis of rotation of the mechanism.
  • These components consist, in particular, of a pressure plate ensuring the bearing contact of the discs on the flywheel in the engaged position, a cover assembled to the plate and a spring diaphragm interposed between the plate and the cover and actuated at its center by a stop connected, via a hydraulic circuit, to the clutch pedal.
  • squeal noise an unpleasant noise generated by a vibratory phenomenon whose frequency is generally between 300 and 500 Hz.
  • This phenomenon is found origin in an irregular, unstable or disturbed mechanical behavior of the components of the clutch mechanism which come to rotatively support with friction on the disk and can be maintained, with each revolution of the motor, by a self-excitation related to the axial symmetry of these components.
  • the persistence over time of this acoustic phenomenon can produce a resonance effect likely to spread beyond the clutch mechanism, thereby becoming detrimental to both the comfort of the persons transported and the safety of the vehicle.
  • FR 3,025,269 describes a mechanism designed to solve this problem by providing that at least one of its components and, in particular, the pressure plate has a discontinuity of distribution of its mass per unit area and / or its stiffness on at least one diametrical axis.
  • the plate which is made in annular form has a inhomogeneous distribution of inertia due to a differential of relative surface mass obtained by the realization directly on the ring of cavities located diametrically opposite or by local contribution of an additional mass, for example, in the form of weights or weights.
  • this pressure plate embodiment poses problems of mechanical strength at high temperature due, on the one hand, the non-uniform inertia distribution resulting from the nature of the industrial manufacturing process by casting of cast or machining and, secondly, the small thickness of the annular plate in areas with low inertia.
  • the invention aims to remedy this technical problem and to eliminate this mechanical strength defect by providing an improved pressure plate, comprising a ring of revolution provided, at its outer periphery, at least three angularly equidistant radial tabs for connection to a cover, characterized in that said ring carries a set of two radially projecting flyweights and arranged on the diametral axis passing through both the center and one of the connection tabs to the cover.
  • This pressure plate has the advantage, thanks to the alignment of the two flyweights along the diametral axis, to reduce the vibratory instabilities that are the cause of the phenomena of "squeal noise” or "anfahrrattern while preserving the thermal behavior of the component.
  • the ring of revolution is provided with at least one fastener member added flyweights.
  • the fastening element is integrated in the thickness of the ring.
  • at least one of the weights has a circumferentially extending body and a radial connecting branch to the ring of the pressure plate.
  • the width of the radial branch is less than half of the circumferential extension of the body of the flyweight.
  • the fasteners are in the form of a plate in which is formed a through bore for the installation of a rivet.
  • the weights are made in one piece with the ring and has a lower fillet so as not to limit the bending capacity of the ring.
  • the weights are carried opposite the inner edge of the ring.
  • the weights are carried opposite the outer edge of the ring. In the latter case, it is expected that one of the two weights is fixed under the connecting tab to the cover on the side of the friction face of the ring.
  • the two weights can be carried respectively by the inner edge and the outer edge of the ring.
  • the face of the weights facing the ring has a curvilinear profile matching the edge of the ring.
  • the flyweight disposed on the side of the bracket to the lid has a lower inertia than the other flyweight disposed opposite.
  • the two weights are disposed on either side of the axis of revolution of the ring and / or that the two weights are geometries. different and / or that the two weights have different masses.
  • Another object of the invention is a use of a pressure plate as defined above in a friction clutch mechanism for a motor vehicle.
  • Still another object of the invention is a friction clutch mechanism comprising a pressure plate incorporating all or part of the features mentioned above, a cover and a diaphragm mounted between the cover and the pressure plate said cover comprises bridges adapted to receive the connecting lugs of the pressure plate and at least one of the bridges is adapted to receive one of the weights.
  • the configuration of the platform of the invention also contributes to neutralize or at least mitigate the excitation which is responsible, depending on the engine speed, the maintenance of the generating vibration of the engine. harmful noise and without it being necessary to modify the structure of the other components of the clutch mechanism.
  • the plate maintains a uniform stiffness along all the axes that does not hinder its setting cone under strong thermal stress and which does not provide additional stresses compared to a traditional tray.
  • Figure 1 shows an exploded overview of a traditional clutch mechanism.
  • Figures 2A and 2B show views, respectively, from above and in diametral section along II-II of a first embodiment of the tray of the invention.
  • Figures 3A, 3B, 4 and 5A, 5B show views, respectively, from above, from below (and in diametral section along II-II of three other embodiments of the tray of the invention.
  • FIG. 1 represents a traditional clutch mechanism comprising, in particular, and in this case essentially, four components with symmetry of revolution about the axis O, respectively, a pressure plate 1, an intermediate diaphragm 2 and a lid 3 whose mutual co-operation has already been summarily described in the introduction.
  • a hinge washer 5 is inserted between the pressure plate 1 and the diaphragm 2 to allow it to pivot relative to the lid 3 during the disengaging phase and, because of its intrinsic elasticity, to make up the wear at their contact area.
  • This pressure plate 1 consists, in the traditional way, of a metal ring 6 provided with three tabs 13 whose orifices 10 are intended for fixing with the lid 3 by means of series of so-called return tabs 4 (see FIG. Figure 5A). These tabs 13 extend radially and angularly equidistant to the periphery of the ring constituting the pressure plate 1.
  • the ring 6 supports various functional elements F formed or reported on its surface and cooperating with complementary elements (not shown) of the clutch mechanism which are not directly related to the invention and which, therefore, will not be explicitly described.
  • the ring 6 consists of three angular sectors la, lb, the substantially identical to 120 ° which are defined between the fastening lugs 13 ( Figure 2A).
  • the mass and therefore the overall inertia of a traditional plate is substantially equal to three times that of one of its angular sectors la, lb, the .
  • the aim of the invention is to improve this friction clutch mechanism with a view to eliminating, or at least significantly reducing, the vibration and acoustic nuisance occurring on certain vehicles during the phase of slippage at the clutch or the clutch. .
  • the invention consists in modifying the structure of the pressure plate and, more specifically, in breaking the distribution uniformity of the mass of the plate to locally create zones of imbalance having an asymmetrical differential in the distribution. inertia. These unbalance zones are formed along a diametral axis X of the ring 6 passing both by its center located on the axis of revolution 0 and by one of the lugs 13 connecting the pressure plate 1 to cover 3 so as to locally create a mass differential between 10% and 30% relative to the mass of the same unmodified ring.
  • the weight mounted on the side of the leg 13 has an inertia (and therefore a mass) lower than that of the other flyweight to take into account the intrinsic inertia of the leg 13.
  • This configuration of the pressure plate of the invention thus creates a dynamic imbalance of the rotating ring due to the presence of an axial discontinuity of the distribution of the mass and therefore the inertia around its periphery.
  • weights are provided on the axis X of the ring 6 by two flyweights 11, 12, radially projecting and facing each other, made here from one piece with the ring.
  • the weights 11, 12 have a T-shaped profile and consist of a body 11a, 12a whose edges substantially follow the inner contour of the ring by being connected to it by radial branches 11b, 12b moreover narrow width.
  • the body 11a, 12a extends circumferentially.
  • the width of the radial branches 11b, 12b is less than half of the circumferential extension of the body 11a, 12a.
  • the width and the thickness of the radial branches 11b, 12b are dimensioned so as to reduce the influence of the weights 11, 12 on the thermal behavior of the pressure plate.
  • the cone of the pressure plate under strong thermal stress remains homogeneous over the entire ring 6.
  • the weights 11, 12 have a lower fillet 14 made here with a concave profile more or less pronounced reducing their thickness to not limit the bending capacity of the ring 6.
  • Figures 3A and 3B show a second variant of the modified tray according to the invention.
  • the ring 6 is provided on its radially inner edge with elements 15 for supporting and fixing weights 11, 12 attached.
  • the elements 15 are preferably made on the side of the diaphragm 2 so as not to hinder the machining operations on the inner diameter of the ring 6.
  • the elements 15 support the flyweights.
  • These elements 15 are in the form of radial plates 15a in which there are formed through holes 15b for fastening rivets R ( Figure 3B) and can be oriented towards the inside or outside of the ring 6, depending the structure of the lid 3, which optimizes the mass of the pressure plate for a determined inertia value.
  • the plates 15a are substantially rectangular with a rectilinear outer edge and orthoradial.
  • the outer edge of the weights 11, 12 extends parallel to the outer edge of the plates 15a and their inner edge is curvilinear following the inner periphery of the ring 6.
  • the respective thicknesses of the plates 15a and reported weights 11, 12 are determined to achieve an assembly flush with the upper face of the plate, as shown in Figure 3B.
  • the fastening of the weights on the plates 15a is obtained by means of rivets R reported or extruded, if the constituent material of the weights allows it, and with a radial play of mounting, as shown in Figures 3A and 3B.
  • the pressure plate 1 maintains a uniform stiffness along all the axes to allow its cone under constraints homogeneously.
  • This modular configuration also makes it possible to adapt the local mass input and the inertia differential made by fixing specific weights in profiles, materials and weights.
  • weighted inserts of a material different from the material constituting the plate (cast iron) and, in particular, of denser materials (steel, tungsten, etc.) so as to optimize the inertia on the diametral axis.
  • FIG. 4 Another variant illustrated in Figure 4 is to integrate the elements 15 fixing the weights in the thickness of the ring.
  • the element 15 comprises a through bore on both sides the thickness of the ring 6 and forms a housing for the fastening rivet weights.
  • the weights are directly on the upper face of the inner edge of the ring 6 and the reported weights 11, 12 are then fixed directly in the ring of the pressure plate 1, as shown in FIG. to obtain a sufficient ballast without generating too much extra thickness, it is expected that the weights 11,12 comprise a body 11a, 12a which, in the fixing position, comes below the level of the upper face of the plate (FIG. extending circumferentially.
  • FIGs 5A and 5B show a fourth variant of the pressure plate according to the invention wherein the weights are both carried by the outer edge of the ring 6.
  • one of the two weights 12 said lower is reported and mounted under the bracket 13 of the pressure plate 1 to the lid 3, as shown in Figure 5B.
  • the lid 3 comprises bridges 31 adapted to receive the connecting lugs of the pressure plate and at least one of the bridges is adapted to receive one of said weights 11, 12.
  • the bridge 31 is arranged to surround at least partially the volume occupied by the weight.
  • This lower flyweight 12 is made here with a U-shaped section to define a housing for the head of the rivet R.
  • This variant provides that the other outer weight 11 is made in one piece with the ring 6 being integral from its upper face.
  • said flyweight is attached and fixed to the plate of a fastening member 15 secured to the outer edge of the ring 6, as described above with reference to a another variant.
  • the two weights are carried, respectively, one 12 by the outer edge of the ring 6 (as in Figure 5B) and the other 11, diametrically opposite, by the inner edge of the ring (as in Figure 4B).
  • the two weights can also be arranged on either side of the axis of revolution of the ring 6 and have different geometries and / or masses.
  • the fastening lugs 13 are of different shapes.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Operated Clutches (AREA)

Abstract

The invention relates to: on one hand a pressure plate (1) for a friction clutch mechanism, comprising a ring (6) of revolution that is provided, on its outer periphery, with at least three angularly equidistant radial tabs (13) for connection to a cover (3), characterized in that said ring bears a set of two masses (11, 12) which project radially and are arranged on the transverse axis (X) passing both through the center of the ring and one of the tabs (13) for connection to the cover; and, on the other hand, to the use thereof in a friction clutch mechanism and to the corresponding friction clutch mechanism.

Description

Plateau de pression pour mécanisme d'embrayage à friction et son utilisation dans un mécanisme d'embrayage à friction pour véhicule automobile  Pressure plate for a friction clutch mechanism and its use in a friction clutch mechanism for a motor vehicle
[0001] L'invention se rapporte à un mécanisme d'embrayage à friction pour véhicule automobile. The invention relates to a friction clutch mechanism for a motor vehicle.
Plus précisément, l'invention concerne un perfectionnement du plateau de pression d'un mécanisme d'embrayage à friction. More specifically, the invention relates to an improvement of the pressure plate of a friction clutch mechanism.
EXPOSÉ DE L'INVENTION STATEMENT OF THE INVENTION
[0002] Les embrayages concernés par l'invention comprennent, d'une part, un ensemble de friction à disques monté sur l'arbre d'entrée de la boîte de vitesses et, d'autre part, un mécanisme rotatif avec des composants à symétrie de révolution autour d'un axe de rotation du mécanisme. Ces composants sont constitués, notamment, d'un plateau de pression assurant le contact d'appui des disques sur le volant moteur en position embrayée, d'un couvercle assemblé au plateau et d'un diaphragme à effet de ressort monté de façon intercalaire entre le plateau et le couvercle et actionné en son centre par une butée raccordée, via un circuit hydraulique, à la pédale d'embrayage.  Clutches concerned by the invention comprise, firstly, a disc friction assembly mounted on the input shaft of the gearbox and, secondly, a rotary mechanism with components to symmetry of revolution around an axis of rotation of the mechanism. These components consist, in particular, of a pressure plate ensuring the bearing contact of the discs on the flywheel in the engaged position, a cover assembled to the plate and a spring diaphragm interposed between the plate and the cover and actuated at its center by a stop connected, via a hydraulic circuit, to the clutch pedal.
[0003] Il se trouve que les phases de ré-embrayage s'accompagnent parfois d'un bruit désagréable (dénommé « squeal noise ») généré par un phénomène vibratoire dont la fréquence est généralement comprise entre 300 et 500 Hz. Ce phénomène trouve son origine dans un comportement mécanique irrégulier, instable ou perturbé des composants du mécanisme d'embrayage qui viennent en appui rotatif avec friction sur le disque et peut se trouver entretenu, à chaque tour du moteur, par une auto -excitation liée à la symétrie axiale de ces composants. Or, la persistance dans le temps de ce phénomène acoustique peut produire un effet de résonance susceptible de se propager au-delà du mécanisme d'embrayage en devenant alors préjudiciable tant au confort des personnes transportées qu'à la sécurité du véhicule. [0004] Le FR 3 025 269 décrit un mécanisme conçu pour résoudre ce problème en prévoyant que l'un au moins de ses composants et, notamment, le plateau de pression présente une discontinuité de distribution de sa masse surfacique et/ou de sa raideur sur au moins un axe diamétral. Le plateau qui est réalisé sous forme annulaire, présente une répartition d'inertie non homogène du fait d'un différentiel de masse surfacique relatif obtenu par la réalisation directement sur l'anneau de cavités situées diamétralement en vis à vis ou par apport local d'une masse additionnelle, par exemple, sous forme de masselottes ou de lests. [0005] Cependant, ce mode de réalisation de plateau de pression pose des problèmes de tenue mécanique à température élevée en raison, d'une part, de la répartition d'inertie non uniforme résultant de la nature du procédé de fabrication industrielle par coulée de fonte ou usinage et, d'autre part, de la faible épaisseur du plateau annulaire dans les zones à faible inertie. [0006] L'invention vise à remédier à ce problème technique et à supprimer ce défaut de tenue mécanique en proposant un plateau de pression perfectionné, comprenant un anneau de révolution pourvu, à sa périphérie externe, d'au moins trois pattes radiales angulairement équidistantes pour le raccordement à un couvercle, caractérisé en ce que ledit anneau porte un jeu de deux masselottes radialement en saillie et disposées sur l'axe diamétral passant à la fois par le centre et par l'une des pattes de raccordement au couvercle. It turns out that the re-clutch phases are sometimes accompanied by an unpleasant noise (called "squeal noise") generated by a vibratory phenomenon whose frequency is generally between 300 and 500 Hz. This phenomenon is found origin in an irregular, unstable or disturbed mechanical behavior of the components of the clutch mechanism which come to rotatively support with friction on the disk and can be maintained, with each revolution of the motor, by a self-excitation related to the axial symmetry of these components. However, the persistence over time of this acoustic phenomenon can produce a resonance effect likely to spread beyond the clutch mechanism, thereby becoming detrimental to both the comfort of the persons transported and the safety of the vehicle. FR 3,025,269 describes a mechanism designed to solve this problem by providing that at least one of its components and, in particular, the pressure plate has a discontinuity of distribution of its mass per unit area and / or its stiffness on at least one diametrical axis. The plate which is made in annular form, has a inhomogeneous distribution of inertia due to a differential of relative surface mass obtained by the realization directly on the ring of cavities located diametrically opposite or by local contribution of an additional mass, for example, in the form of weights or weights. However, this pressure plate embodiment poses problems of mechanical strength at high temperature due, on the one hand, the non-uniform inertia distribution resulting from the nature of the industrial manufacturing process by casting of cast or machining and, secondly, the small thickness of the annular plate in areas with low inertia. The invention aims to remedy this technical problem and to eliminate this mechanical strength defect by providing an improved pressure plate, comprising a ring of revolution provided, at its outer periphery, at least three angularly equidistant radial tabs for connection to a cover, characterized in that said ring carries a set of two radially projecting flyweights and arranged on the diametral axis passing through both the center and one of the connection tabs to the cover.
[0007] Ce plateau de pression, selon l'invention, présente l'avantage, grâce à l'alignement des deux masselottes selon l'axe diamétral, de réduire les instabilités vibratoires qui sont à l'origine des phénomènes de « squeal noise » ou de « anfahrrattern tout en préservant le comportement thermique du composant. This pressure plate, according to the invention, has the advantage, thanks to the alignment of the two flyweights along the diametral axis, to reduce the vibratory instabilities that are the cause of the phenomena of "squeal noise" or "anfahrrattern while preserving the thermal behavior of the component.
[0008] Selon une première variante, l'anneau de révolution est pourvu d'au moins un élément de fixation de masselottes rapportées. According to a first variant, the ring of revolution is provided with at least one fastener member added flyweights.
[0009] De préférence, l'élément de fixation est intégré dans l'épaisseur de l'anneau. [0010] Avantageusement, au moins une des masselottes présente un corps s'étendant circonférentiellement et une branche radiale de raccordement à l'anneau du plateau de pression. Preferably, the fastening element is integrated in the thickness of the ring. Advantageously, at least one of the weights has a circumferentially extending body and a radial connecting branch to the ring of the pressure plate.
[0011] Avantageusement, la largeur de la branche radiale est inférieure à la moitié de l'extension circonférentielle du corps de la masselotte. Advantageously, the width of the radial branch is less than half of the circumferential extension of the body of the flyweight.
[0012] Selon une autre variante, les éléments de fixation sont sous forme d'une platine dans laquelle est ménagé un alésage traversant pour la pose d'un rivet. According to another variant, the fasteners are in the form of a plate in which is formed a through bore for the installation of a rivet.
[0013] Selon encore une autre variante, les masselottes sont réalisées d'une seule pièce avec l'anneau et présente un congé inférieur pour ne pas limiter la capacité de flexion de l'anneau. According to yet another variant, the weights are made in one piece with the ring and has a lower fillet so as not to limit the bending capacity of the ring.
[0014] Selon une variante spécifique, les masselottes sont portées en vis à vis par le bord intérieur de l'anneau. According to a specific variant, the weights are carried opposite the inner edge of the ring.
[0015] Selon une autre variante, les masselottes sont portées en vis à vis par le bord extérieur de l'anneau. [0016] Dans ce dernier cas, il est prévu que l'une des deux masselottes est fixée sous la patte de raccordement au couvercle du côté de la face de friction de l'anneau. According to another variant, the weights are carried opposite the outer edge of the ring. In the latter case, it is expected that one of the two weights is fixed under the connecting tab to the cover on the side of the friction face of the ring.
[0017] Alternativement, les deux masselottes peuvent être portées respectivement par le bord intérieur et le bord extérieur de l'anneau. Alternatively, the two weights can be carried respectively by the inner edge and the outer edge of the ring.
[0018] Selon une autre caractéristique, la face des masselottes en regard de l'anneau a un profil curviligne épousant le bord de l'anneau. According to another characteristic, the face of the weights facing the ring has a curvilinear profile matching the edge of the ring.
[0019] Avantageusement, la masselotte disposée du côté de la patte de raccordement au couvercle a une plus faible inertie que l'autre masselotte disposée en vis à vis. Advantageously, the flyweight disposed on the side of the bracket to the lid has a lower inertia than the other flyweight disposed opposite.
[0020] Selon d'autres caractéristiques de l'invention, il est possible de prévoir que les deux masselottes soient disposées de part et d'autre de l'axe de révolution de l'anneau et/ou que les deux masselottes soient de géométries différentes et/ou que les deux masselottes présentent des masses différentes. [0021] Un autre objet de l'invention est une utilisation d'un plateau de pression tel que défini ci-dessus dans un mécanisme d'embrayage à friction pour véhicule automobile. According to other features of the invention, it is possible to provide that the two weights are disposed on either side of the axis of revolution of the ring and / or that the two weights are geometries. different and / or that the two weights have different masses. Another object of the invention is a use of a pressure plate as defined above in a friction clutch mechanism for a motor vehicle.
[0022] Encore un autre objet de l'invention est un mécanisme d'embrayage à friction comprenant un plateau de pression reprenant tout ou partie des caractéristiques mentionnées précédemment, un couvercle et un diaphragme monté de façon intercalaire entre le couvercle et le plateau de pression, ledit couvercle comporte des ponts aptes à recevoir les pattes de raccordement du plateau de pression et au moins l'un des ponts est apte à recevoir l'une des masselottes. [0023] Les discontinuités apportées au niveau de l'inertie du plateau de pression selon l'invention permettent de limiter le couplage de ses modes axi-symétriques et, en conséquence, de supprimer ou de réduire les instabilités vibratoires qui sont à l'origine des phénomènes de « squeal noise » ou de « anfahrrattern ». Still another object of the invention is a friction clutch mechanism comprising a pressure plate incorporating all or part of the features mentioned above, a cover and a diaphragm mounted between the cover and the pressure plate said cover comprises bridges adapted to receive the connecting lugs of the pressure plate and at least one of the bridges is adapted to receive one of the weights. Discontinuities brought to the level of the inertia of the pressure plate according to the invention make it possible to limit the coupling of its axi-symmetric modes and, consequently, to eliminate or reduce the vibratory instabilities which are at the origin phenomena of "squeal noise" or "anfahrrattern".
[0024] En outre et plus particulièrement, la configuration du plateau de l'invention contribue aussi à neutraliser ou tout au moins à atténuer l'excitation qui est responsable, en fonction du régime du moteur, de l'entretien de la vibration génératrice du bruit néfaste et sans qu'il soit nécessaire de modifier la structure des autres composants du mécanisme d'embrayage. In addition and more particularly, the configuration of the platform of the invention also contributes to neutralize or at least mitigate the excitation which is responsible, depending on the engine speed, the maintenance of the generating vibration of the engine. harmful noise and without it being necessary to modify the structure of the other components of the clutch mechanism.
[0025] Grâce à l'invention, le plateau conserve une raideur homogène selon tous les axes qui n'entrave pas sa mise en cône sous forte sollicitation thermique et qui n'apporte pas de sollicitations supplémentaires par rapport à un plateau traditionnel. Thanks to the invention, the plate maintains a uniform stiffness along all the axes that does not hinder its setting cone under strong thermal stress and which does not provide additional stresses compared to a traditional tray.
[0026] L'ajout de masses à l'intérieur et/ou à l'extérieur de l'anneau du plateau permet d'éviter son amincissement qui était auparavant préjudiciable à sa tenue en température tout en apportant une réponse efficace à la fonction de découplage. [0027] Le plateau dont l'anneau a initialement une répartition de masse uniforme présente ainsi, du fait de l'ajout des masselottes, des inerties de basculement différentes suivant les axes principaux. BREVE DESCRIPTION DES FIGURES The addition of masses inside and / or outside the tray ring prevents its thinning which was previously detrimental to its temperature resistance while providing an effective response to the function of decoupling. The plate whose ring initially has a uniform mass distribution and has, due to the addition of flyweights, different tilting inertia along the main axes. BRIEF DESCRIPTION OF THE FIGURES
[0028] D'autres caractéristiques et avantages de l'invention ressortiront à la lecture de la description qui va suivre, en référence aux figures annexées et détaillées ci-après. La figure 1 représente une vue d'ensemble éclatée d'un mécanisme d'embrayage traditionnel.  Other features and advantages of the invention will become apparent from reading the description which follows, with reference to the accompanying figures and detailed below. Figure 1 shows an exploded overview of a traditional clutch mechanism.
Les figures 2A et 2B représentent, des vues, respectivement, de dessus et en coupe diamétrale selon II-II d'un premier mode de réalisation du plateau de l'invention. Figures 2A and 2B show views, respectively, from above and in diametral section along II-II of a first embodiment of the tray of the invention.
Les figures 3A, 3B, 4 et 5A, 5B représentent des vues, respectivement, de dessus, de dessous (et en coupe diamétrale selon II-II de trois autres modes de réalisation du plateau de l'invention. Figures 3A, 3B, 4 and 5A, 5B show views, respectively, from above, from below (and in diametral section along II-II of three other embodiments of the tray of the invention.
Pour plus de clarté, les éléments identiques ou similaires sont repérés par des signes de référence identiques sur l'ensemble des figures. For the sake of clarity, identical or similar elements are marked with identical reference signs throughout the figures.
DESCRIPTION DÉTAILLÉE DE MODES DE REALISATION DETAILED DESCRIPTION OF EMBODIMENTS
[0029] Naturellement, les modes de réalisation illustrés par les figures présentées ci-dessus ne sont donnés qu'à titre d'exemples non limitatifs. Il est explicitement prévu, selon l'invention, que l'on puisse combiner entre eux ces différents modes pour en proposer d'autres. Of course, the embodiments illustrated by the figures presented above are given by way of non-limiting examples. It is explicitly provided, according to the invention, that one can combine these different modes to propose others.
[0030] La figure 1 représente un mécanisme d'embrayage traditionnel comprenant, notamment et, ici essentiellement, quatre composants à symétrie de révolution autour de l'axe O, respectivement, un plateau de pression 1, un diaphragme intercalaire 2 et un couvercle 3 dont la coopération mutuelle a déjà été sommairement décrite en introduction. FIG. 1 represents a traditional clutch mechanism comprising, in particular, and in this case essentially, four components with symmetry of revolution about the axis O, respectively, a pressure plate 1, an intermediate diaphragm 2 and a lid 3 whose mutual co-operation has already been summarily described in the introduction.
Accessoirement, une rondelle d'articulation 5 est introduite entre le plateau de pression 1 et le diaphragme 2 pour lui permettre de pivoter par rapport au couvercle 3 lors de la phase de débrayage et, du fait de son élasticité intrinsèque, de rattraper l'usure au niveau de leur zone de contact. Ce plateau de pression 1 est constitué, de manière traditionnelle, d'un anneau métallique 6 pourvu de trois pattes 13 dont les orifices 10 sont destinés à la fixation avec le couvercle 3 par l'intermédiaire de séries de languettes 4 dites de rappel (voir figure 5A). Ces pattes 13 s'étendent radialement et de façon angulairement équidistantes à la périphérie de l'anneau constituant le plateau de pression 1. Incidentally, a hinge washer 5 is inserted between the pressure plate 1 and the diaphragm 2 to allow it to pivot relative to the lid 3 during the disengaging phase and, because of its intrinsic elasticity, to make up the wear at their contact area. This pressure plate 1 consists, in the traditional way, of a metal ring 6 provided with three tabs 13 whose orifices 10 are intended for fixing with the lid 3 by means of series of so-called return tabs 4 (see FIG. Figure 5A). These tabs 13 extend radially and angularly equidistant to the periphery of the ring constituting the pressure plate 1.
[0031] Cet anneau supporte différents éléments fonctionnels F ménagés ou rapportés sur sa surface et coopérant avec des éléments complémentaires (non représentés) du mécanisme d'embrayage qui, sont sans rapport direct avec l'invention et qui, par conséquent, ne seront pas explicitement décrits. [0032] L'anneau 6 est constitué de trois secteurs angulaires la, lb, le sensiblement identiques à 120° qui sont délimités entre les pattes de fixation 13 (figure 2A). This ring supports various functional elements F formed or reported on its surface and cooperating with complementary elements (not shown) of the clutch mechanism which are not directly related to the invention and which, therefore, will not be explicitly described. The ring 6 consists of three angular sectors la, lb, the substantially identical to 120 ° which are defined between the fastening lugs 13 (Figure 2A).
Dans un plateau de pression 1 traditionnel tel qu'illustré par la figure 1, les masses des secteurs sont égales mais, du fait de la présence des éléments fonctionnels F en saillie ou en creux, elle n'est pas nécessairement répartie de façon homogène sur chaque secteur et donc sur le pourtour de l'anneau 6. In a traditional pressure plate 1 as illustrated in FIG. 1, the masses of the sectors are equal but, because of the presence of the functional elements F protruding or recessed, it is not necessarily distributed homogeneously over each sector and therefore on the periphery of the ring 6.
Dans ces conditions, compte tenu de la symétrie de révolution de l'anneau 6, la masse et donc l'inertie globale d'un plateau traditionnel est sensiblement égale à trois fois celle de l'un de ses secteurs angulaires la, lb, le. L'invention vise à perfectionner ce mécanisme d'embrayage à friction en vue de supprimer, ou tout au moins, de réduire de façon significative les nuisances vibratoires et acoustiques survenant sur certains véhicules, dans la phase de patinage à l'embrayage ou au débrayage. Under these conditions, given the symmetry of revolution of the ring 6, the mass and therefore the overall inertia of a traditional plate is substantially equal to three times that of one of its angular sectors la, lb, the . The aim of the invention is to improve this friction clutch mechanism with a view to eliminating, or at least significantly reducing, the vibration and acoustic nuisance occurring on certain vehicles during the phase of slippage at the clutch or the clutch. .
[0033] Dans ce but, l'invention consiste à modifier la structure du plateau de pression et, plus précisément, à rompre l'uniformité de répartition de la masse du plateau pour créer localement des zones de déséquilibre présentant un différentiel asymétrique dans la distribution d'inertie. [0034] Ces zones de déséquilibre sont ménagées selon un axe diamétral X de l'anneau 6 passant à la fois par son centre situé sur l'axe de révolution 0 et par l'une des pattes 13 de raccordement du plateau de pression 1 au couvercle 3 de façon à créer localement un différentiel de masse compris entre 10% et 30% par rapport à la masse du même anneau non modifié. For this purpose, the invention consists in modifying the structure of the pressure plate and, more specifically, in breaking the distribution uniformity of the mass of the plate to locally create zones of imbalance having an asymmetrical differential in the distribution. inertia. These unbalance zones are formed along a diametral axis X of the ring 6 passing both by its center located on the axis of revolution 0 and by one of the lugs 13 connecting the pressure plate 1 to cover 3 so as to locally create a mass differential between 10% and 30% relative to the mass of the same unmodified ring.
[0035] Dans toutes les variantes, il est alors prévu que la masselotte montée du côté de la patte 13 ait une inertie (et donc une masse) plus faible que celle de l'autre masselotte pour tenir compte de l'inertie intrinsèque de la patte 13. In all variants, it is then expected that the weight mounted on the side of the leg 13 has an inertia (and therefore a mass) lower than that of the other flyweight to take into account the intrinsic inertia of the leg 13.
[0036] Cette configuration du plateau de pression de l'invention créé ainsi un déséquilibre dynamique de l'anneau en rotation du fait de la présence d'une discontinuité axiale de la distribution de la masse et donc de l'inertie sur son pourtour. This configuration of the pressure plate of the invention thus creates a dynamic imbalance of the rotating ring due to the presence of an axial discontinuity of the distribution of the mass and therefore the inertia around its periphery.
Il en résulte une modification très sensible de la cinématique de rotation du plateau de pression par un effet de ballant ou d'inertie de basculement orienté suivant deux axes perpendiculaires à la fois entre eux et relativement à son axe de révolution. This results in a very substantial change in the rotational kinematics of the pressure plate by a swinging effect or tilting inertia oriented along two axes perpendicular to each other and relative to its axis of revolution.
[0037] Dans le mode de réalisation illustré par les figures 2A et 2B, des lests sont apportés sur l'axe X de l'anneau 6 par deux masselottes 11, 12, radialement en saillie et en vis à vis, réalisées ici d'une seule pièce avec l'anneau. Dans ce mode réalisation, les masselottes 11, 12 ont un profil en T et sont constituées d'un corps lia, 12a dont les bords suivent sensiblement le contour intérieur de l'anneau en lui étant raccordés par des branches radiales 11b, 12b de plus faible largeur. Le corps lia, 12a s'étend circonférentiellement. In the embodiment illustrated by FIGS. 2A and 2B, weights are provided on the axis X of the ring 6 by two flyweights 11, 12, radially projecting and facing each other, made here from one piece with the ring. In this embodiment, the weights 11, 12 have a T-shaped profile and consist of a body 11a, 12a whose edges substantially follow the inner contour of the ring by being connected to it by radial branches 11b, 12b moreover narrow width. The body 11a, 12a extends circumferentially.
Dans le cas présent, la largeur des branches radiales 11b, 12b est inférieure à la moitié de l'extension circonférentielle du corps lia, 12a. La largeur et l'épaisseur des branches radiales 11b, 12b sont dimensionnées de manière à réduire l'influence des masselottes 11, 12 sur le comportement thermique du plateau de pression. La mise en cône du plateau de pression sous forte sollicitation thermique reste homogène sur l'intégralité de l'anneau 6. [0038] Comme illustré par la vue en coupe de la figure 2B, les masselottes 11, 12 présentent un congé inférieur 14 réalisé ici avec un profil concave plus ou moins prononcé réduisant leur épaisseur pour ne pas limiter la capacité de flexion de l'anneau 6. [0039] D'autres variantes de modifications susceptibles d'être apportées au plateau de pression 1, prises isolément ou en combinaison, vont être décrites de façon détaillée ci-après, en référence aux figures 3A, 3B, 4A, 4B et 5A, 5B. In the present case, the width of the radial branches 11b, 12b is less than half of the circumferential extension of the body 11a, 12a. The width and the thickness of the radial branches 11b, 12b are dimensioned so as to reduce the influence of the weights 11, 12 on the thermal behavior of the pressure plate. The cone of the pressure plate under strong thermal stress remains homogeneous over the entire ring 6. As illustrated by the sectional view of Figure 2B, the weights 11, 12 have a lower fillet 14 made here with a concave profile more or less pronounced reducing their thickness to not limit the bending capacity of the ring 6. Other variants of modifications that may be made to the pressure plate 1, taken individually or in combination, will be described in detail hereinafter with reference to FIGS. 3A, 3B, 4A, 4B and FIG. 5A, 5B.
[0040] Les figures 3A et 3B représentent une seconde variante du plateau modifié selon l'invention. Dans cette variante, l'anneau 6 est pourvu, sur son bord radialement intérieur, d'éléments 15 de support et de fixation de masselottes 11, 12 rapportées. Les éléments 15 sont réalisés, de préférence, du côté du diaphragme 2 pour ne pas gêner les opérations d'usinage sur le diamètre intérieur de l'anneau 6. Les éléments 15 supportent les masselottes. Figures 3A and 3B show a second variant of the modified tray according to the invention. In this variant, the ring 6 is provided on its radially inner edge with elements 15 for supporting and fixing weights 11, 12 attached. The elements 15 are preferably made on the side of the diaphragm 2 so as not to hinder the machining operations on the inner diameter of the ring 6. The elements 15 support the flyweights.
Ces éléments 15 sont sous forme de platines radiales 15a dans lesquelles sont ménagés des alésages traversants 15b destinés à la fixation de rivets R (figure 3B) et peuvent être orientés vers l'intérieur ou vers l'extérieur de l'anneau 6, en fonction de la structure du couvercle 3, ce qui permet d'optimiser la masse du plateau de pression pour une valeur d'inertie déterminée. These elements 15 are in the form of radial plates 15a in which there are formed through holes 15b for fastening rivets R (Figure 3B) and can be oriented towards the inside or outside of the ring 6, depending the structure of the lid 3, which optimizes the mass of the pressure plate for a determined inertia value.
[0041] Les platines 15a sont sensiblement rectangulaires avec un bord extérieur rectiligne et orthoradial. Le bord extérieur des masselottes 11, 12 s'étend parallèlement au bord extérieur des platines 15a et leur bord intérieur est curviligne en suivant le pourtour intérieur de l'anneau 6. The plates 15a are substantially rectangular with a rectilinear outer edge and orthoradial. The outer edge of the weights 11, 12 extends parallel to the outer edge of the plates 15a and their inner edge is curvilinear following the inner periphery of the ring 6.
Les épaisseurs respectives des platines 15a et des masselottes rapportées 11, 12 sont déterminées pour réaliser un assemblage affleurant la face supérieure du plateau, comme illustré par la figure 3B. La fixation des masselottes sur les platines 15a est obtenue au moyen de rivets R rapportés ou extrudés, si la matière constitutive des masselottes l'autorise, et avec un jeu radial de montage, comme illustré par les figures 3A et 3B. [0042] Dans ce mode de réalisation, le plateau de pression 1 conserve une raideur homogène selon tous les axes pour permettre sa mise en cône sous contraintes de façon homogène. The respective thicknesses of the plates 15a and reported weights 11, 12 are determined to achieve an assembly flush with the upper face of the plate, as shown in Figure 3B. The fastening of the weights on the plates 15a is obtained by means of rivets R reported or extruded, if the constituent material of the weights allows it, and with a radial play of mounting, as shown in Figures 3A and 3B. In this embodiment, the pressure plate 1 maintains a uniform stiffness along all the axes to allow its cone under constraints homogeneously.
Cette configuration modulaire permet aussi d'adapter l'apport local de masse et le différentiel d'inertie réalisé en fixant des masselottes spécifiques en profils, matières et en poids. This modular configuration also makes it possible to adapt the local mass input and the inertia differential made by fixing specific weights in profiles, materials and weights.
Il serait ainsi possible, selon l'invention, de réaliser des masselottes rapportées en un matériau différent du matériau constitutif du plateau (fonte) et, notamment, en des matériaux plus denses (acier, tungstène,...) de façon à optimiser l'inertie sur l'axe diamétral. It would thus be possible, according to the invention, to produce weighted inserts of a material different from the material constituting the plate (cast iron) and, in particular, of denser materials (steel, tungsten, etc.) so as to optimize the inertia on the diametral axis.
[0043] Une autre variante illustrée par la figure 4 consiste à intégrer les éléments 15 de fixation des masselottes dans l'épaisseur de l'anneau. L'élément 15 comprend un alésage traversant de part et d'autre l'épaisseur de l'anneau 6 et forme un logement pour le rivet de fixation des masselottes. Dans cette configuration, les masselottes sont directement sur la face supérieure du bord intérieur de l'anneau 6 et les masselottes rapportées 11, 12 sont alors fixées directement dans l'anneau du plateau de pression 1, comme illustré par la figure 4. Afin d'obtenir un lest suffisant sans générer une surépaisseur trop importante, il est prévu que les masselottes 11,12 comportent un corps lia, 12a qui, en position de fixation, vient sous le niveau de la face supérieure du plateau (figure 4) en s'étendant circonférentiellement. Another variant illustrated in Figure 4 is to integrate the elements 15 fixing the weights in the thickness of the ring. The element 15 comprises a through bore on both sides the thickness of the ring 6 and forms a housing for the fastening rivet weights. In this configuration, the weights are directly on the upper face of the inner edge of the ring 6 and the reported weights 11, 12 are then fixed directly in the ring of the pressure plate 1, as shown in FIG. to obtain a sufficient ballast without generating too much extra thickness, it is expected that the weights 11,12 comprise a body 11a, 12a which, in the fixing position, comes below the level of the upper face of the plate (FIG. extending circumferentially.
[0044] Les figures 5A et 5B représentent une quatrième variante du plateau de pression selon l'invention dans laquelle les masselottes sont toutes deux portées par le bord extérieur de l'anneau 6. Dans ce cas, l'une des deux masselottes 12 dite inférieure est rapportée et montée sous la patte de fixation 13 du plateau de pression 1 au couvercle 3, comme illustré par la figure 5B. A cet effet, le couvercle 3 comporte des ponts 31 aptes à recevoir les pattes de raccordement du plateau de pression et au moins l'un des ponts est apte à recevoir l'une desdites masselottes 11, 12. Le pont 31 est agencé pour entourer au moins partiellement le volume occupé par la masselotte. Figures 5A and 5B show a fourth variant of the pressure plate according to the invention wherein the weights are both carried by the outer edge of the ring 6. In this case, one of the two weights 12 said lower is reported and mounted under the bracket 13 of the pressure plate 1 to the lid 3, as shown in Figure 5B. For this purpose, the lid 3 comprises bridges 31 adapted to receive the connecting lugs of the pressure plate and at least one of the bridges is adapted to receive one of said weights 11, 12. The bridge 31 is arranged to surround at least partially the volume occupied by the weight.
Cette masselotte inférieure 12 est réalisée ici avec une section en U de façon à délimiter un logement pour la tête du rivet R. Cette variante prévoit que l'autre masselotte extérieure 11 est réalisée d'une seule pièce avec l'anneau 6 en étant solidaire de sa face supérieure. Il serait toutefois possible, sans sortir du cadre de l'invention, de prévoir que cette masselotte soit rapportée et fixée sur la platine d'un élément 15 de fixation solidaire du bord extérieur de l'anneau 6, comme décrit précédemment en référence à une autre variante. This lower flyweight 12 is made here with a U-shaped section to define a housing for the head of the rivet R. This variant provides that the other outer weight 11 is made in one piece with the ring 6 being integral from its upper face. However, it would be possible, without departing from the scope of the invention, to provide that said flyweight is attached and fixed to the plate of a fastening member 15 secured to the outer edge of the ring 6, as described above with reference to a another variant.
[0045] Selon une autre variante, non représentée, consisterait en ce que les deux masselottes sont portées, respectivement, l'une 12 par le bord extérieur de l'anneau 6 (comme sur la figure 5B) et l'autre 11, diamétralement opposée, par le bord intérieur de l'anneau (comme sur la figure 4B). According to another variant, not shown, would consist that the two weights are carried, respectively, one 12 by the outer edge of the ring 6 (as in Figure 5B) and the other 11, diametrically opposite, by the inner edge of the ring (as in Figure 4B).
[0046] Les deux masselottes peuvent aussi être disposées de part et d'autre de l'axe de révolution de l'anneau 6 et présenter des géométries et/ou des masses différentes. The two weights can also be arranged on either side of the axis of revolution of the ring 6 and have different geometries and / or masses.
[0047] Selon encore une autre variante de l'invention, il est prévu que les pattes de fixation 13 soient de formes différentes. According to yet another variant of the invention, it is provided that the fastening lugs 13 are of different shapes.

Claims

Revendications claims
1 . Plateau de pression (1) pour mécanisme d'embrayage à friction comprenant un anneau (6) de révolution pourvu, à sa périphérie externe, d'au moins trois pattes radiales (13) angulairement équidistantes pour le raccordement à un couvercle (3), caractérisé en ce que ledit anneau porte un jeu de deux masselottes (11, 12) radialement en saillie et disposées sur l'axe diamétral (X) passant à la fois par son centre et l'une des pattes (13) de raccordement au couvercle. 1. Pressure plate (1) for friction clutch mechanism comprising a ring (6) of revolution provided, at its outer periphery, with at least three radial lugs (13) angularly equidistant for connection to a lid (3), characterized in that said ring carries a set of two flyweights (11, 12) radially projecting and arranged on the diametral axis (X) passing through both its center and one of the lugs (13) connecting to the cover .
2. Plateau de pression selon la revendication 1, caractérisé en ce que ledit anneau (6) est pourvu d'au moins un élément (15) de fixation de masselottes (11, 12) rapportées. 2. Pressure plate according to claim 1, characterized in that said ring (6) is provided with at least one element (15) for fixing weights (11, 12) reported.
3. Plateau de pression selon la revendication précédente, caractérisé en ce qu'au moins un élément (15) de fixation est intégré dans l'épaisseur de l'anneau (6).  3. Pressure plate according to the preceding claim, characterized in that at least one fastening element (15) is integrated in the thickness of the ring (6).
4. Plateau de pression selon la revendication 2, caractérisé en ce que l'élément (15) de fixation est réalisé sous forme d'une platine (15a) dans laquelle est ménagé un alésage traversant (15b) pour la pose d'un rivet (R) de fixation des masselottes. 4. Pressure plate according to claim 2, characterized in that the element (15) for fixing is formed as a plate (15a) in which is formed a through bore (15b) for the installation of a rivet (R) fixing the weights.
5. Plateau de pression selon la revendication 1 ou 2, caractérisé en ce qu'au moins une des masselottes (11, 12) est réalisée d'une seule pièce avec l'anneau (1). 5. Pressure plate according to claim 1 or 2, characterized in that at least one of the weights (11, 12) is formed in one piece with the ring (1).
6. Plateau de pression selon la revendication précédente, caractérisé en ce que la au moins une des masselottes (11, 12) présente : 6. Pressure plate according to the preceding claim, characterized in that the at least one of the weights (11, 12) has:
un corps (lia, 12a) s'étendant circonférentiellement et, une branche radiale (11b, 12b) de raccordement à l'anneau (6).  a body (11a, 12a) extending circumferentially and a radial branch (11b, 12b) for connection to the ring (6).
7. Plateau de pression selon la revendication précédente, caractérisé en ce que la largeur de la branche radiale (11b, 12b) est inférieure à la moitié de l'extension circonférentielle du corps (lia, 12a) de la masselotte. 7. Pressure plate according to the preceding claim, characterized in that the width of the radial branch (11b, 12b) is less than half of the circumferential extension of the body (11a, 12a) of the weight.
8. Plateau de pression selon l'une des revendications précédentes, caractérisé en ce que lesdites masselottes (11, 12) sont portées en vis à vis par le bord intérieur de l'anneau (6). 8. Pressure plate according to one of the preceding claims, characterized in that said weights (11, 12) are carried facing the inner edge of the ring (6).
9. Plateau de pression selon l'une des revendications 1 à 7, caractérisé en ce que lesdites masselottes (11, 12) sont portées en vis à vis par le bord extérieur de l'anneau (6). 9. Pressure plate according to one of claims 1 to 7, characterized in that said weights (11, 12) are carried facing the outer edge of the ring (6).
10. Plateau de pression selon la revendication précédente, caractérisé en ce que l'une (12) des deux masselottes est fixée sous la patte (13) de raccordement au couvercle (3) du côté de la face de friction de l'anneau (6).  10. Pressure plate according to the preceding claim, characterized in that one (12) of the two weights is fixed under the tab (13) for connection to the cover (3) on the side of the friction face of the ring ( 6).
1 1 . Plateau de pression selon l'une des revendications 1 à 7, caractérisé en ce que les deux masselottes (11, 12) sont portées respectivement par le bord intérieur et le bord extérieur de l'anneau (6).  1 1. Pressure plate according to one of claims 1 to 7, characterized in that the two weights (11, 12) are carried respectively by the inner edge and the outer edge of the ring (6).
12. Plateau de pression selon l'une des revendications précédentes, caractérisé en ce que la face desdites masselottes (11, 12) en regard de l'anneau (6) a un profil curviligne épousant le bord de l'anneau. 12. Pressure plate according to one of the preceding claims, characterized in that the face of said weights (11, 12) facing the ring (6) has a curvilinear profile matching the edge of the ring.
13. Plateau de pression selon l'une des revendications précédentes, caractérisé en ce que la masselotte (12) disposée du côté de la patte (13) de raccordement au couvercle (3) a une plus faible inertie que l'autre masselotte (11) disposée en vis à vis.  13. Pressure plate according to one of the preceding claims, characterized in that the weight (12) disposed on the side of the lug (13) for connection to the cover (3) has a lower inertia than the other flyweight (11). ) arranged opposite.
14. Utilisation d'un plateau de pression (1) selon l'une des revendications précédentes dans un mécanisme d'embrayage à friction pour véhicule automobile.  14. Use of a pressure plate (1) according to one of the preceding claims in a friction clutch mechanism for a motor vehicle.
15. Mécanisme d'embrayage à friction comprenant : 15. Friction clutch mechanism comprising:
un plateau de pression (1) selon l'une quelconque des revendications précédentes,  a pressure plate (1) according to any one of the preceding claims,
un couvercle (3),  a lid (3),
un diaphragme (2) monté de façon intercalaire entre le couvercle (3) et le plateau de pression (1),  a diaphragm (2) interposed between the cover (3) and the pressure plate (1),
caractérisé en ce que ledit couvercle comporte des ponts (31) aptes à recevoir les pattes de raccordement du plateau de pression et en ce que au moins l'un des ponts est apte à recevoir l'une desdites masselottes (11, 12).  characterized in that said cover comprises bridges (31) adapted to receive the connecting lugs of the pressure plate and in that at least one of the bridges is adapted to receive one of said flyweights (11, 12).
PCT/EP2017/064953 2016-06-28 2017-06-19 Pressure plate for a friction clutch mechanism and use thereof in a friction clutch mechanism for a motor vehicle WO2018001779A1 (en)

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FR1656047A FR3053084B1 (en) 2016-06-28 2016-06-28 PRESSURE PLATE FOR FRICTION CLUTCH MECHANISM AND USE THEREOF IN FRICTION CLUTCH MECHANISM FOR MOTOR VEHICLE
FR1656047 2016-06-28

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Publication number Priority date Publication date Assignee Title
US5906258A (en) * 1996-05-14 1999-05-25 Exedy Corporation Pressure plate preformed with protrusions and method for balancing the pressure plate by removing portions of the protrusions
FR2853374A1 (en) * 2003-04-05 2004-10-08 Zf Sachs Ag Pressure plate assembly for friction clutch, has actuating plates activated by action of force actuating device of clutch disc assembly, and balance weight excrescence fixed on plate assembly to compensate imbalance
US8434606B2 (en) * 2009-04-27 2013-05-07 Schaeffler Technologies AG & Co. KG Clutch
FR3025269A1 (en) 2014-09-03 2016-03-04 Valeo Embrayages CLUTCH MECHANISM AND USE THEREOF IN A TRANSMISSION SYSTEM FOR A MOTOR VEHICLE

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CN109563886B (en) 2020-11-03
FR3053084A1 (en) 2017-12-29
CN109563886A (en) 2019-04-02
FR3053084B1 (en) 2018-07-27

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