WO2014207373A1 - Clutch device, in particular for a motor vehicle - Google Patents

Clutch device, in particular for a motor vehicle Download PDF

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Publication number
WO2014207373A1
WO2014207373A1 PCT/FR2014/051583 FR2014051583W WO2014207373A1 WO 2014207373 A1 WO2014207373 A1 WO 2014207373A1 FR 2014051583 W FR2014051583 W FR 2014051583W WO 2014207373 A1 WO2014207373 A1 WO 2014207373A1
Authority
WO
WIPO (PCT)
Prior art keywords
clutch device
output shaft
damping means
support
play
Prior art date
Application number
PCT/FR2014/051583
Other languages
French (fr)
Inventor
Olivier Marechal
Giovanni Grieco
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 DE112014002990.4T priority Critical patent/DE112014002990T5/en
Publication of WO2014207373A1 publication Critical patent/WO2014207373A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • F16F15/14—Suppression of vibrations in rotating systems by making use of members moving with the system using masses freely rotating with the system, i.e. uninvolved in transmitting driveline torque, e.g. rotative dynamic dampers
    • F16F15/1407—Suppression of vibrations in rotating systems by making use of members moving with the system using masses freely rotating with the system, i.e. uninvolved in transmitting driveline torque, e.g. rotative dynamic dampers the rotation being limited with respect to the driving means
    • F16F15/145—Masses mounted with play with respect to driving means thus enabling free movement over a limited range
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
    • F16F15/131—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon the rotating system comprising two or more gyratory masses
    • F16F15/13164—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon the rotating system comprising two or more gyratory masses characterised by the supporting arrangement of the damper unit

Definitions

  • the present invention relates to a clutch device, in particular for a motor vehicle.
  • the patent application DE 10 2006 028 552 discloses a clutch device comprising a flywheel attached to the end of a crankshaft of a heat engine, serving as a reaction plate, a pressure plate movable relative to the reaction plate between a position close to said trays, wherein said trays clamp a friction disc, and a position spaced from said trays, wherein said trays release the friction disc.
  • the latter is rotatably coupled to a central hub by means of spring damping means.
  • the central hub comprises splines cooperating with complementary splines of an input shaft of a gearbox.
  • the hub is further equipped with pendular damping means.
  • pendular damping means include a support whose radially inner periphery is fixed to the hub and whose radially outer portion is equipped with pendular masses, movable relative to the support.
  • pendular damping means can dampen and absorb vibration and motor rotation acyclisms.
  • the friction disk is equipped with liners for rubbing against the pressure plate and against the reaction plate. These packings wear out during operation, which modifies the position of the friction disk and, consequently, of the hub to which it is attached. Thus, in such a case, the position of the pendular damping means is also variable over time, in particular as a function of the wear of said linings.
  • the mounting of the hub on the input shaft of the gearbox is performed with clearance, which allows a hub of the hub relative to the shaft, again generating an imprecision as to the position actual pendulum damping means in operation.
  • the tree can flex in significant proportions, when it transmits a significant torque.
  • the space available to house the clutch device is relatively low and subject to numerous constraints of space.
  • the displacement of the damping means can disrupt their effectiveness as well as the operation of the clutch mechanism itself (poor release of the friction disc, noisiness phenomena).
  • the patent application DE 196 18 864 discloses a clutch device in which the support is rotatably mounted on the flywheel and is rotatably coupled to the hub, by means of a connecting member riveted to the hub. The connection between the connecting member and the support of the pendular masses is provided by disengageable means.
  • Such a structure in addition to its significant complexity, is also dependent on the axial position of the hub. Indeed, in operation, the wear of the lining of the friction disc, the hub swiveling phenomenon with respect to the shaft and the bending phenomenon of the shaft cause a displacement of the connecting member that can affect the operation. disengageable means and, consequently, the effectiveness of the pendular masses.
  • the patent application DE 2012 213 904 discloses a clutch device in which the pendular damping means are mounted on the output shaft and rotatably coupled thereto. More particularly, the pendular damping means comprise an annular support partly radially external of which are mounted the pendular masses, the radially inner periphery of the support having splines cooperating with complementary splines of the output shaft. Such a structure requires to provide a slight mounting clearance between the grooves of the support of the pendular damping means and the splines of the output shaft. This clearance allows a slight rotation of the pendulum damping means relative to the output shaft, which significantly degrades the efficiency of pendular masses and can generate noise in operation.
  • the invention aims in particular to provide a simple, effective and economical solution to these problems.
  • a clutch device comprising a flywheel intended to be fixed to an input shaft, such as for example a crankshaft, and a hub coupled in rotation to an output shaft, such as for example that an input shaft of a gearbox, a clutch mechanism for coupling or decoupling in rotation the flywheel and the hub, damping means comprising a support equipped with pendular masses and rotatably coupled to the shaft output via complementary splines of the damping means and the output shaft, characterized in that it comprises a play compensating member engaged with the splines of the output shaft and mounted so that movable relative to the pendulum damping means, resilient return means being mounted between said pendular damping means and said play compensator member so as to bias the play compensator member to a pos locking it in which it constrains the splines of the pendulum damping means against the splines of the output shaft.
  • the pendular damping means are thus not linked to the hub and are therefore not dependent on any axial displacement of the hub or hub swiveling phenomenon with respect to the output shaft.
  • the structure of the device according to the invention is relatively simple and it It is possible to reduce the size of the clutch device, for the reasons mentioned above.
  • the play compensating member comprises a ring comprising splines in engagement with the splines of the output shaft.
  • the elastic return means may exert a restoring torque greater than 15 Nm, preferably between 15 and 100 Nm on the ring.
  • the elastic return means comprise at least one helical spring bearing, at one end, on the play catch member and, at another end, on the pendular damping means.
  • the pendulum damping means and the play catch member may each comprise at least one window serving to accommodate at least a portion of the spring, the ends of the spring bearing on the corresponding ends of the windows , so as to return the play catch member to its locking position.
  • the damping means may comprise an annular housing in which is mounted and guided in rotation said play catch member.
  • axial stop means can maintain said play compensator member in the annular housing of the damping means.
  • the steering wheel comprises an annular rim around which the support is mounted by means of a bearing, the pendular damping means further comprising a connecting member connecting the support to the output shaft and having the splines cooperating with the complementary splines of the output shaft.
  • the connecting member may then comprise a sheet extending radially between the support and the output shaft, so as to reduce the useless mass of the pendular damping means and their size.
  • a sheet which is preferably flexible, also makes it possible to prevent the bending phenomena of the output shaft during operation from affecting the efficiency of the pendular masses.
  • the connecting member may comprise a ring whose radially inner periphery comprises the grooves cooperating with the complementary splines of the output shaft, said ring being fixed at the radially inner periphery of the sheet, the catch-up member of play being movable relative to said ring.
  • the support is annular and mounted on the output shaft, the radially inner periphery of the support comprising the splines cooperating with the complementary splines of the output shaft, the catch-up member game is mobile with respect to said support.
  • the flywheel comprises a first part, called upstream, intended to be fixed to the input shaft, and a second part, called downstream, attached to the first part and defining with the latter a annular cavity in which are housed, at least in part, the support and the pendular masses.
  • the clutch mechanism may comprise a movable pressure plate relative to a reaction plate, said pressure and reaction plates being able to clamp or release a friction disk coupled in rotation to the hub, the plate of reaction being formed by the second part of the steering wheel.
  • the friction disk can then be coupled to the hub by means of damping means and / or pre-damping means.
  • Pre-damping means are in particular known from the patent application FR 2 984 982, in the name of the Applicant.
  • FIG. 1 is a view in axial section of a clutch device according to a first embodiment of the invention
  • FIG. 2 is a detailed view of the zone referenced II in FIG. 1;
  • FIGS. 3 and 4 are exploded views, in perspective, of the connecting member of the device of FIGS. 1 and 2,
  • FIG. 5 is a perspective view of the connecting member of FIGS. 3 and 4,
  • FIG. 6 is a detailed view of the area referenced VI in FIG. 5,
  • FIG. 7 is a view in axial section of a clutch device according to a second embodiment of the invention.
  • FIG. 8 is a detailed view of the zone referenced VIII in FIG. 7
  • FIG. 9 is an exploded view, in perspective, of part of the pendulum damping means of the device of FIGS. 7 and 8,
  • FIGs 1 to 6 illustrate a clutch device 1 according to a first embodiment of the invention. It comprises a wheel 2, located upstream in Figure 1, having a first annular portion 3 and a second annular portion 4.
  • the first part 3 comprises a radial portion 5 whose radially inner periphery comprises screw holes 7 for fixing the flywheel 2 to the downstream end of a crankshaft 8 of an internal combustion engine of a motor vehicle.
  • An annular flange 9 extends axially downstream from the downstream surface of the radial portion 5. This flange 9 has a radially outer surface 10 which is cylindrical.
  • the radially outer periphery of the radial portion 5 carries a ring gear 11 and is extended by a cylindrical rim 12 extending downstream, itself extended by a projecting portion 13, annular and radially external.
  • the second portion 4 has a radial portion 14, the radially outer periphery is extended by a cylindrical rim 15 extending downstream.
  • the upstream radial face of the second portion 4 comprises an annular outer annular peripheral zone 16 which receives the annular projecting portion 13 of the first portion 3.
  • the flat free end of the flange 12 bears on the radial face. upstream of the second part 4.
  • the two parts 3, 4 of the wheel 2 are fixed to one another at their radially outer periphery, by means of screws 17.
  • the screws 17 also serve for fixing a lid 18 in the form of a bell, fixed downstream of the second part 4 of the flywheel 2, the internal volume of the cover 18 serving to house, at least in part, a clutch mechanism 19.
  • the second part 4 of the flywheel 2 comprises a radial downstream surface 20 serving to support the linings 21 of a friction disc 22 of the clutch mechanism 19. This second part 4 thus forms a reaction plate of the clutch mechanism 19.
  • the friction disc 22 is connected to a central hub 23, by means of spring damping means 24, and spring pre-damping means 25.
  • the structure of these damping means 24 and of pre-damping 25 will not be detailed here and is known from the prior art, including the patent application FR 2 984 982 in the name of the Applicant.
  • the hub 23 has internal splines 26 cooperating with external splines of an input shaft 27 of a gearbox, also called an output shaft of the clutch device 1.
  • the clutch mechanism 19 further comprises a pressure plate 28, movable in axial translation relative to the reaction plate 4 between a position close to the reaction plate 4, in which said plates 4, 28 clamp the friction disc 22 ( position engaged), and a position spaced from said plates 4, 28, wherein said plates 4, 28 release the friction disc 22 (disengaged position).
  • the trays 4, 28, the cover 18 and the flywheel 2 are coupled in rotation with each other.
  • the displacement of the pressure plate 28 is actuated by means of a diaphragm 29 bearing on the cover 18 at zones 30, as is well known per se.
  • the clutch device 1 further comprises pendular damping means 31 comprising a support 32 extending radially.
  • the radially inner portion of the support 32 has holes 33 for mounting rivets 34.
  • the first portion 3 of the flywheel 2 has holes 40 for the passage of a riveting tool, for the establishment of the rivets 34.
  • the support 32 is pivotally mounted around the outer surface 10 of the flange 9 of the first part 3 of the wheel 2, via a Bearing, such as for example a sliding bearing 35.
  • Pendular masses 36 are mounted in pairs on the radially outer portion of the support 32, the masses 36 of the same pair being mounted facing each other and on either side of the support 32.
  • the masses 36 comprise arc-shaped elongated holes into which the ends of the rollers 38 are engaged (FIG. 2).
  • the median regions of the rollers 38 are engaged in arcuate oblong holes of the support 32.
  • Other types of assembly known to those skilled in the art, can also be used to mount the pendular masses 36 on the support 32.
  • the masses 36 are thus driven in a pendular motion relative to the support 32, the trajectories of the masses 36 being in particular dependent on the shapes of the aforementioned oblong holes.
  • a connecting member 41 connects the support 32 to the input shaft 27 of the gearbox.
  • This connecting member 41 comprises a metal sheet 42 thin and flexible, with a thickness of between 0.4 and 1.5 mm.
  • the radially outer periphery of the plate 42 comprises holes 43 allowing the rivets 34 to pass, so as to fix the plate 42 on the support 32.
  • the radially inner periphery of the plate 42 is fixed, for example by riveting, to a ring 44.
  • the ring 44 has grooves 45 at its radially inner periphery, cooperating with complementary splines 45 of the output shaft 27.
  • the said grooves 45, 46 are dimensioned so as to provide a set of mounting between them.
  • the ring 44 further comprises an annular housing 47 ( Figure 4), opening upstream, delimited externally by a cylindrical rim 48 extending upstream.
  • Tabs 49 extend radially at the radially outer periphery of the ring 44, each tab 49 having a hole 50 for engaging a rivet 51, mounted in a corresponding hole 52 of the radially inner periphery of the plate 42.
  • the periphery radially internal of the plate 42 also has holes 53 allowing the passage of the screws 7.
  • the ring 44 also comprises four oblong windows 54, each window 54 being delimited by two end faces 55 and two longitudinal faces 56, respectively radially inner and outer ( Figure 3).
  • the windows 54 are oriented substantially perpendicular to the radial direction and open on either side of the ring 44. In particular, the windows 54 open upstream in the annular housing 47. The radially inner periphery of the sheet 42, resting on the upstream face of the ring 44, closes the upstream end of the windows 54.
  • a slack adjuster 57 also in the form of a ring, is pivotally mounted in the housing 47.
  • the diameter of the slack adjuster 57 substantially corresponds to the diameter of the housing 47, so that that the rim 48 of the ring 44 guides in rotation the play-catching member 57.
  • the radially inner periphery of the play-catching member 57 comprises splines 58 intended to cooperate with the splines 46 of the spindle output 27.
  • the play catch member 57 finally has four windows 59, similar in shape and orientation to those 54 of the ring 44, arranged facing windows 54 of the ring 44 and opening only on the downstream face of the catch-up member 57.
  • Oblong slots 60 smaller than the windows 59, open at the upstream face of the play-catching member 57 and in the windows 59.
  • the catch-up member 57 is maintained axi in the annular housing 47 of the ring 44, via a split resilient locking ring 61 of the circlip type engaged in a groove in the radially inner wall of the flange 48 of the ring 44.
  • Coil compression springs 62 are mounted in the windows 54, 59, one end of each spring 62 bearing on one of the end faces 55 of the corresponding window 54 of the ring 44, the other end of the spring bearing on the opposite end face 55 of the corresponding window 59 of the play catch member 57.
  • the springs 62 exert a preload or a torque on the play catch member 57 so that, once the ring 44 and the play catch member 57 mounted around the splines 46 of the shaft 27, the springs 62 urge the clearance member 57 to a locking position in which it constrains the splines 45 of the ring 44 against the splines 46 of the output shaft 27.
  • the restoring torque exerted by the springs 62 is for example greater than 15 Nm, preferably for example between 15 and 100 Nm
  • the lights 60 can form gripping areas for a tool, for moving the play catch member 57 to its unlocked position.
  • the lights 60 are accessible from upstream, after removal of the flywheel 2 relative to the crankshaft 8.
  • the rotation of the crankshaft 8 drives that of the shaft 27, in the engaged position of the clutch mechanism 19.
  • the rotational speeds of the shaft 27 and the flywheel 2 may be different from each other.
  • the rotation of the shaft 27 causes the rotation of the support 32 equipped with the pendular masses 36, via the connecting member 41.
  • the efficiency of these pendular damping means 31 is not affected by a displacement of the hub 23, due in particular to a wear of the linings 21 of the friction disc 22 or a swiveling of the hub 23 on the 27.
  • the flexible nature of the sheet 42 makes it possible to prevent the bending phenomena of the shaft 27 affect the behavior and efficiency of the pendulum damping means 31.
  • the play-catching member 57 makes it possible to make up the clearance between the splines 45 of the ring 44 and those 46 of the shaft 27, so as to limit the noise and to guarantee the efficiency of the pendulum damping means 31.
  • Figures 7 to 1 1 illustrate a second embodiment of the clutch device 1 according to the invention.
  • the pendular damping means 31 comprise a support 32 mounted directly on the output shaft 27, and no longer around a flange of the flywheel 2.
  • support 32 extends radially outwardly to fit between the flywheels and limit angular movements (contact on the support web and not on the masses).
  • the pendular masses 36 are mounted in part radially external of the support 32, on either side of the support 32.
  • the grooves 45 and the annular housing 47 are formed directly in the radially inner portion of the support 32, the Grip catch 57 is, as previously, mounted in the annular housing 47 externally bounded by the rim 48.
  • the play catch member 57 is biased by the springs 62 towards its locking position.
  • a sheet 63 is fixed in the middle part of the support ( Figure 7). This sheet 63 extends radially outwardly and forms a thermal protection element (baffle) and protection against dust, especially from friction linings. Holes 64 are formed in the support 32, so as to allow the passage of the screws 7.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Operated Clutches (AREA)

Abstract

The invention relates to a clutch device (1) comprising a flywheel (2) intended for being attached to a crankshaft (8), and a hub (23) rotatably coupled to an input shaft (27) of a gearbox, a clutch mechanism (19) making it possible to rotatably couple or uncouple the flywheel (2) and the hub (23), damping means (31) comprising a mounting (32) provided with pendulous masses (36) and rotatably coupled to the output shaft (27) via complementary splines. The clutch device comprises a play-compensation member (57) and resilient return means (62) mounted between said pendulous damping means (31) and said play-compensation member (57) such as to bias the play-compensation member (57) into a locking position in which it pushes the splines of the pendulous damping means (31) against the splines of the shaft (27).

Description

Dispositif d'embrayage, notamment pour véhicule automobile  Clutch device, in particular for a motor vehicle
La présente invention concerne un dispositif d'embrayage, notamment pour véhicule automobile.  The present invention relates to a clutch device, in particular for a motor vehicle.
La demande de brevet DE 10 2006 028 552 divulgue un dispositif d'embrayage comportant un volant fixé à l'extrémité d'un vilebrequin d'un moteur thermique, servant de plateau de réaction, un plateau de pression mobile par rapport au plateau de réaction entre une position rapprochée desdits plateaux, dans laquelle lesdits plateaux serrent un disque de friction, et une position écartée desdits plateaux, dans laquelle lesdits plateaux libèrent le disque de friction.  The patent application DE 10 2006 028 552 discloses a clutch device comprising a flywheel attached to the end of a crankshaft of a heat engine, serving as a reaction plate, a pressure plate movable relative to the reaction plate between a position close to said trays, wherein said trays clamp a friction disc, and a position spaced from said trays, wherein said trays release the friction disc.
Ce dernier est couplé en rotation à un moyeu central par l'intermédiaire de moyens d'amortissement à ressorts. Le moyeu central comporte des cannelures coopérant avec des cannelures complémentaires d'un arbre d'entrée d'une boîte de vitesses.  The latter is rotatably coupled to a central hub by means of spring damping means. The central hub comprises splines cooperating with complementary splines of an input shaft of a gearbox.
Le moyeu est en outre équipé de moyens d'amortissement pendulaires. Ces derniers comportent un support dont la périphérie radialement interne est fixée au moyeu et dont la partie radialement externe est équipée de masses pendulaires, mobiles par rapport au support. De tels moyens d'amortissement pendulaires permettent d'amortir et d'absorber les vibrations et les acyclismes de rotation du moteur.  The hub is further equipped with pendular damping means. These include a support whose radially inner periphery is fixed to the hub and whose radially outer portion is equipped with pendular masses, movable relative to the support. Such pendular damping means can dampen and absorb vibration and motor rotation acyclisms.
Le disque de friction est équipé de garnitures destinées à frotter contre le plateau de pression et contre le plateau de réaction. Ces garnitures s'usent en fonctionnement, ce qui modifie la position du disque de friction et, par conséquent, du moyeu auquel il est lié. Ainsi, dans un tel cas, la position des moyens d'amortissement pendulaires est également variable au cours du temps, notamment en fonction de l'usure desdites garnitures.  The friction disk is equipped with liners for rubbing against the pressure plate and against the reaction plate. These packings wear out during operation, which modifies the position of the friction disk and, consequently, of the hub to which it is attached. Thus, in such a case, the position of the pendular damping means is also variable over time, in particular as a function of the wear of said linings.
Par ailleurs, le montage du moyeu sur l'arbre d'entrée de la boîte de vitesses est réalisé avec jeu, ce qui permet un rotulage du moyeu par rapport à l'arbre, générant là encore une imprécision quant à la position réelle des moyens d'amortissement pendulaires en fonctionnement. Enfin, l'arbre peut fléchir dans des proportions non négligeables, lorsqu'il transmet un couple important. Furthermore, the mounting of the hub on the input shaft of the gearbox is performed with clearance, which allows a hub of the hub relative to the shaft, again generating an imprecision as to the position actual pendulum damping means in operation. Finally, the tree can flex in significant proportions, when it transmits a significant torque.
De telles imprécisions de positionnement obligent à concevoir des cavités relativement grandes pour loger les moyens d'amortissement, en vue d'éviter tout risque d'interférence ou de collision avec d'autres parties du dispositif d'embrayage.  Such positioning inaccuracies require the design of relatively large cavities for accommodating the damping means, in order to avoid any risk of interference or collision with other parts of the clutch device.
Cependant, dans un véhicule automobile par exemple, l'espace disponible pour loger le dispositif d'embrayage est relativement faible et soumis à de nombreuses contraintes d'encombrement.  However, in a motor vehicle for example, the space available to house the clutch device is relatively low and subject to numerous constraints of space.
Par ailleurs, le déplacement des moyens d'amortissement peut perturber leur efficacité ainsi que le fonctionnement du mécanisme d'embrayage en lui-même (mauvaise libération du disque de friction, phénomènes de bruyance).  Moreover, the displacement of the damping means can disrupt their effectiveness as well as the operation of the clutch mechanism itself (poor release of the friction disc, noisiness phenomena).
La demande de brevet DE 196 18 864 divulgue un dispositif d'embrayage dans lequel le support est monté de façon mobile en rotation sur le volant et est couplé en rotation au moyeu, par l'intermédiaire d'un organe de liaison riveté au moyeu. La liaison entre l'organe de liaison et le support des masses pendulaires est assurée par des moyens débrayables.  The patent application DE 196 18 864 discloses a clutch device in which the support is rotatably mounted on the flywheel and is rotatably coupled to the hub, by means of a connecting member riveted to the hub. The connection between the connecting member and the support of the pendular masses is provided by disengageable means.
Une telle structure, outre son importante complexité, est également tributaire de la position axiale du moyeu. En effet, en fonctionnement, l'usure des garnitures du disque de friction, le phénomène de rotulage du moyeu par rapport à l'arbre et le phénomène de flexion de l'arbre provoquent un déplacement de l'organe de liaison pouvant affecter le fonctionnement des moyens débrayables et, par conséquent, l'efficacité des masses pendulaires.  Such a structure, in addition to its significant complexity, is also dependent on the axial position of the hub. Indeed, in operation, the wear of the lining of the friction disc, the hub swiveling phenomenon with respect to the shaft and the bending phenomenon of the shaft cause a displacement of the connecting member that can affect the operation. disengageable means and, consequently, the effectiveness of the pendular masses.
La demande de brevet DE 2012 213 904 divulgue un dispositif d'embrayage dans lequel les moyens d'amortissement pendulaires sont montés sur l'arbre de sortie et couplés en rotation à celui-ci. Plus particulièrement, les moyens d'amortissement pendulaires comportent un support annulaire en partie radialement externe duquel sont montées les masses pendulaires, la périphérie radialement interne du support comportant des cannelures coopérant avec des cannelures complémentaires de l'arbre de sortie. Une telle structure oblige à prévoir un léger jeu de montage entre les cannelures du support des moyens d'amortissement pendulaires et les cannelures de l'arbre de sortie. Ce jeu permet une légère rotation des moyens d'amortissement pendulaires par rapport à l'arbre de sortie, ce qui dégrade de façon significative l'efficacité des masses pendulaires et peut générer du bruit en fonctionnement. The patent application DE 2012 213 904 discloses a clutch device in which the pendular damping means are mounted on the output shaft and rotatably coupled thereto. More particularly, the pendular damping means comprise an annular support partly radially external of which are mounted the pendular masses, the radially inner periphery of the support having splines cooperating with complementary splines of the output shaft. Such a structure requires to provide a slight mounting clearance between the grooves of the support of the pendular damping means and the splines of the output shaft. This clearance allows a slight rotation of the pendulum damping means relative to the output shaft, which significantly degrades the efficiency of pendular masses and can generate noise in operation.
L'invention a notamment pour but d'apporter une solution simple, efficace et économique à ces problèmes.  The invention aims in particular to provide a simple, effective and economical solution to these problems.
A cet effet, elle propose un dispositif d'embrayage comportant un volant destiné à être fixé à un arbre d'entrée, tel par exemple qu'un vilebrequin, et un moyeu couplé en rotation à un arbre de sortie, tel par exemple qu'un arbre d'entrée d'une boîte de vitesses, un mécanisme d'embrayage permettant de coupler ou découpler en rotation le volant et le moyeu, des moyens d'amortissement comportant un support équipé de masses pendulaires et couplé en rotation à l'arbre de sortie par l'intermédiaire de cannelures complémentaires des moyens d'amortissement et de l'arbre de sortie, caractérisé en ce qu'il comporte un organe de rattrapage de jeu en prise avec les cannelures de l'arbre de sortie et monté de façon déplaçable par rapport aux moyens d'amortissement pendulaires, des moyens élastiques de rappel étant montés entre lesdits moyens d'amortissement pendulaires et ledit organe de rattrapage de jeu de façon à solliciter l'organe de rattrapage de jeu vers une position de verrouillage dans laquelle il contraint les cannelures des moyens d'amortissement pendulaires contre les cannelures de l'arbre de sortie.  For this purpose, it proposes a clutch device comprising a flywheel intended to be fixed to an input shaft, such as for example a crankshaft, and a hub coupled in rotation to an output shaft, such as for example that an input shaft of a gearbox, a clutch mechanism for coupling or decoupling in rotation the flywheel and the hub, damping means comprising a support equipped with pendular masses and rotatably coupled to the shaft output via complementary splines of the damping means and the output shaft, characterized in that it comprises a play compensating member engaged with the splines of the output shaft and mounted so that movable relative to the pendulum damping means, resilient return means being mounted between said pendular damping means and said play compensator member so as to bias the play compensator member to a pos locking it in which it constrains the splines of the pendulum damping means against the splines of the output shaft.
Les moyens d'amortissement pendulaires ne sont ainsi pas liés au moyeu et ne sont donc pas tributaires d'un éventuel déplacement axial du moyeu ou du phénomène de rotulage du moyeu par rapport à l'arbre de sortie. La structure du dispositif selon l'invention est relativement simple et il est possible de réduire l'encombrement du dispositif d'embrayage, pour les raisons évoquées précédemment. The pendular damping means are thus not linked to the hub and are therefore not dependent on any axial displacement of the hub or hub swiveling phenomenon with respect to the output shaft. The structure of the device according to the invention is relatively simple and it It is possible to reduce the size of the clutch device, for the reasons mentioned above.
Comme précédemment, le montage des moyens d'amortissement pendulaires sur l'arbre de sortie à l'aide de cannelures complémentaires nécessite un léger jeu de montage. Ce jeu est cependant rattrapé à l'aide de l'organe de rattrapage de jeu et des moyens élastiques de rappel, de façon à garantir que les cannelures des moyens d'amortissement pendulaires restent en appui sur les cannelures de l'arbre de sortie. Ceci permet d'améliorer l'efficacité des moyens d'amortissement pendulaires et de réduire le bruit, par comparaison avec l'art antérieur.  As before, the mounting of the pendular damping means on the output shaft with the aid of complementary splines requires a slight set of mounting. This game is, however, caught up with the help of the slack adjuster and elastic return means, so as to ensure that the splines of the pendular damping means remain in abutment on the splines of the output shaft. This makes it possible to improve the efficiency of the pendular damping means and to reduce the noise, as compared with the prior art.
Selon une caractéristique de l'invention, l'organe de rattrapage de jeu comporte une bague comprenant des cannelures en prise avec les cannelures de l'arbre de sortie.  According to one characteristic of the invention, the play compensating member comprises a ring comprising splines in engagement with the splines of the output shaft.
Dans ce cas, les moyens élastiques de rappel peuvent exercer un couple de rappel supérieur à 15 Nm, de préférence compris entre 15 et 100 N.m sur la bague.  In this case, the elastic return means may exert a restoring torque greater than 15 Nm, preferably between 15 and 100 Nm on the ring.
On garantit ainsi que la bague exerce un couple supérieur au couple acyclique à filtrer, tout en étant suffisamment faible pour permettre un montage et un démontage aisé des moyens d'amortissement pendulaires par rapport à l'arbre de sortie.  This ensures that the ring exerts a torque greater than the acyclic torque to be filtered, while being small enough to allow easy mounting and dismounting of the pendular damping means relative to the output shaft.
De préférence, les moyens élastiques de rappel comportent au moins un ressort hélicoïdal venant en appui, à une extrémité, sur l'organe de rattrapage de jeu et, à une autre extrémité, sur les moyens d'amortissement pendulaires.  Preferably, the elastic return means comprise at least one helical spring bearing, at one end, on the play catch member and, at another end, on the pendular damping means.
Dans ce cas, les moyens d'amortissement pendulaires et l'organe de rattrapage de jeu peuvent comporter chacun au moins une fenêtre servant au logement d'au moins une partie du ressort, les extrémités du ressort venant en appui sur les extrémités correspondantes des fenêtres, de manière à rappeler l'organe de rattrapage de jeu vers sa position de verrouillage. Les moyens d'amortissement peuvent comporter un logement annulaire dans lequel est monté et guidé en rotation ledit organe de rattrapage de jeu. In this case, the pendulum damping means and the play catch member may each comprise at least one window serving to accommodate at least a portion of the spring, the ends of the spring bearing on the corresponding ends of the windows , so as to return the play catch member to its locking position. The damping means may comprise an annular housing in which is mounted and guided in rotation said play catch member.
Dans ce cas, des moyens d'arrêt axial peuvent maintenir ledit organe de rattrapage de jeu dans le logement annulaire des moyens d'amortissement.  In this case, axial stop means can maintain said play compensator member in the annular housing of the damping means.
Selon une forme de réalisation de l'invention, le volant comporte un rebord annulaire autour duquel est monté le support par l'intermédiaire d'un palier, les moyens d'amortissement pendulaires comportant en outre un organe de liaison reliant le support à l'arbre de sortie et comportant les cannelures coopérant avec les cannelures complémentaires de l'arbre de sortie.  According to one embodiment of the invention, the steering wheel comprises an annular rim around which the support is mounted by means of a bearing, the pendular damping means further comprising a connecting member connecting the support to the output shaft and having the splines cooperating with the complementary splines of the output shaft.
L'organe de liaison peut alors comporter une tôle s'étendant radialement entre le support et l'arbre de sortie, de manière à réduire la masse non utile des moyens d'amortissement pendulaires ainsi que leur encombrement. L'utilisation d'une tôle, de préférence flexible, permet en outre d'éviter que les phénomènes de flexion de l'arbre de sortie en fonctionnement affectent l'efficacité des masses pendulaires.  The connecting member may then comprise a sheet extending radially between the support and the output shaft, so as to reduce the useless mass of the pendular damping means and their size. The use of a sheet, which is preferably flexible, also makes it possible to prevent the bending phenomena of the output shaft during operation from affecting the efficiency of the pendular masses.
Par ailleurs, l'organe de liaison peut comporter une bague dont la périphérie radialement interne comporte les cannelures coopérant avec les cannelures complémentaires de l'arbre de sortie, ladite bague étant fixée en périphérie radialement interne de la tôle, l'organe de rattrapage de jeu étant mobile par rapport à ladite bague.  Furthermore, the connecting member may comprise a ring whose radially inner periphery comprises the grooves cooperating with the complementary splines of the output shaft, said ring being fixed at the radially inner periphery of the sheet, the catch-up member of play being movable relative to said ring.
Selon une autre forme de réalisation de l'invention, le support est annulaire et monté sur l'arbre de sortie, la périphérie radialement interne du support comportant les cannelures coopérant avec les cannelures complémentaires de l'arbre de sortie, l'organe de rattrapage de jeu étant mobile par rapport audit support.  According to another embodiment of the invention, the support is annular and mounted on the output shaft, the radially inner periphery of the support comprising the splines cooperating with the complementary splines of the output shaft, the catch-up member game is mobile with respect to said support.
De manière préférée, le volant comporte une première partie, dite amont, destinée à être fixée à l'arbre d'entrée, et une seconde partie, dite aval, fixée à la première partie et délimitant avec cette dernière une cavité annulaire dans laquelle sont logés, au moins en partie, le support et les masses pendulaires. Preferably, the flywheel comprises a first part, called upstream, intended to be fixed to the input shaft, and a second part, called downstream, attached to the first part and defining with the latter a annular cavity in which are housed, at least in part, the support and the pendular masses.
Dans ce cas, le mécanisme d'embrayage peut comporter un plateau de pression mobile par rapport à un plateau de réaction, lesdits plateaux de pression et de réaction étant aptes à serrer ou libérer un disque de friction couplé en rotation au moyeu, le plateau de réaction étant formé par la seconde partie du volant.  In this case, the clutch mechanism may comprise a movable pressure plate relative to a reaction plate, said pressure and reaction plates being able to clamp or release a friction disk coupled in rotation to the hub, the plate of reaction being formed by the second part of the steering wheel.
Le disque de friction peut alors être couplé au moyeu par l'intermédiaire de moyens d'amortissement et/ou de moyens de pré- amortissement. Des moyens de pré-amortissement sont notamment connus de la demande de brevet FR 2 984 982, au nom de la Demanderesse.  The friction disk can then be coupled to the hub by means of damping means and / or pre-damping means. Pre-damping means are in particular known from the patent application FR 2 984 982, in the name of the Applicant.
L'invention sera mieux comprise et d'autres détails, caractéristiques et avantages de l'invention apparaîtront à la lecture de la description suivante faite à titre d'exemple non limitatif en référence aux dessins annexés dans lesquels:  The invention will be better understood and other details, characteristics and advantages of the invention will appear on reading the following description given by way of non-limiting example with reference to the accompanying drawings in which:
- la figure 1 est une vue en coupe axiale d'un dispositif d'embrayage selon une première forme de réalisation de l'invention,  FIG. 1 is a view in axial section of a clutch device according to a first embodiment of the invention,
- la figure 2 est une vue de détail de la zone référencée II à la figure 1 ,  FIG. 2 is a detailed view of the zone referenced II in FIG. 1;
- les figures 3 et 4 sont des vues éclatées, en perspective, de l'organe de liaison du dispositif des figures 1 et 2,  FIGS. 3 and 4 are exploded views, in perspective, of the connecting member of the device of FIGS. 1 and 2,
- la figure 5 est une vue en perspective de l'organe de liaison des figures 3 et 4,  FIG. 5 is a perspective view of the connecting member of FIGS. 3 and 4,
- la figure 6 est une vue de détail de la zone référencée VI à la figure 5,  FIG. 6 is a detailed view of the area referenced VI in FIG. 5,
- la figure 7 est une vue en coupe axiale d'un dispositif d'embrayage selon une seconde forme de réalisation de l'invention,  FIG. 7 is a view in axial section of a clutch device according to a second embodiment of the invention,
- la figure 8 est une vue de détail de la zone référencée VIII à la figure 7, - la figure 9 est une vue éclatée, en perspective, d'une partie des moyens d'amortissement pendulaires du dispositif des figures 7 et 8, FIG. 8 is a detailed view of the zone referenced VIII in FIG. 7, FIG. 9 is an exploded view, in perspective, of part of the pendulum damping means of the device of FIGS. 7 and 8,
- les figures 10 et 1 1 sont des vues en perspective d'une partie desdits moyens d'amortissement pendulaires.  - Figures 10 and 1 1 are perspective views of a portion of said pendular damping means.
Les figures 1 à 6 illustrent un dispositif d'embrayage 1 selon une première forme de réalisation de l'invention. Celui-ci comporte un volant 2, situé à l'amont sur la figure 1 , comportant une première partie 3 annulaire et une seconde partie 4 annulaire. La première partie 3 comporte une portion radiale 5 dont la périphérie radialement interne comprend des trous 6 de passage de vis 7 servant à la fixation du volant 2 sur l'extrémité aval d'un vilebrequin 8 d'un moteur à combustion interne d'un véhicule automobile. Un rebord annulaire 9 s'étend axialement vers l'aval depuis la surface aval de la partie radiale 5. Ce rebord 9 comporte une surface radialement externe 10 qui est cylindrique.  Figures 1 to 6 illustrate a clutch device 1 according to a first embodiment of the invention. It comprises a wheel 2, located upstream in Figure 1, having a first annular portion 3 and a second annular portion 4. The first part 3 comprises a radial portion 5 whose radially inner periphery comprises screw holes 7 for fixing the flywheel 2 to the downstream end of a crankshaft 8 of an internal combustion engine of a motor vehicle. An annular flange 9 extends axially downstream from the downstream surface of the radial portion 5. This flange 9 has a radially outer surface 10 which is cylindrical.
La périphérie radialement externe de la partie radiale 5 porte une couronne dentée 1 1 et est prolongée par un rebord cylindrique 12 s'étendant vers l'aval, lui-même prolongé par une partie en saillie 13, annulaire et radialement externe.  The radially outer periphery of the radial portion 5 carries a ring gear 11 and is extended by a cylindrical rim 12 extending downstream, itself extended by a projecting portion 13, annular and radially external.
La seconde partie 4 comporte une partie radiale 14, dont la périphérie radialement externe est prolongée par un rebord cylindrique 15 s'étendant vers l'aval. La face radiale amont de la seconde partie 4 comporte une zone périphérique externe annulaire en creux 16 qui reçoit la partie en saillie annulaire 13 de la première partie 3. En outre, l'extrémité libre plane du rebord 12 est en appui sur la face radiale amont de la seconde partie 4. Les deux parties 3, 4 du volant 2 sont fixées l'une à l'autre, à leur périphérie radialement externe, par l'intermédiaire de vis 17.  The second portion 4 has a radial portion 14, the radially outer periphery is extended by a cylindrical rim 15 extending downstream. The upstream radial face of the second portion 4 comprises an annular outer annular peripheral zone 16 which receives the annular projecting portion 13 of the first portion 3. In addition, the flat free end of the flange 12 bears on the radial face. upstream of the second part 4. The two parts 3, 4 of the wheel 2 are fixed to one another at their radially outer periphery, by means of screws 17.
Les vis 17 servent également à la fixation d'un couvercle 18 en forme de cloche, fixé en aval de la seconde partie 4 du volant 2, le volume interne du couvercle 18 servant à loger, au moins en partie, un mécanisme d'embrayage 19. La seconde partie 4 du volant 2 comporte une surface aval radiale 20 servant à l'appui des garnitures 21 d'un disque de friction 22 du mécanisme d'embrayage 19. Cette seconde partie 4 forme ainsi un plateau de réaction du mécanisme d'embrayage 19. Le disque de friction 22 est relié à un moyeu central 23, par l'intermédiaire de moyens d'amortissement à ressorts 24, et de moyens de pré-amortissement à ressorts 25. La structure de ces moyens d'amortissement 24 et de pré-amortissement 25 ne sera pas détaillée ici et est connue de l'art antérieur, notamment de la demande de brevet FR 2 984 982 au nom de la Demanderesse. The screws 17 also serve for fixing a lid 18 in the form of a bell, fixed downstream of the second part 4 of the flywheel 2, the internal volume of the cover 18 serving to house, at least in part, a clutch mechanism 19. The second part 4 of the flywheel 2 comprises a radial downstream surface 20 serving to support the linings 21 of a friction disc 22 of the clutch mechanism 19. This second part 4 thus forms a reaction plate of the clutch mechanism 19. The friction disc 22 is connected to a central hub 23, by means of spring damping means 24, and spring pre-damping means 25. The structure of these damping means 24 and of pre-damping 25 will not be detailed here and is known from the prior art, including the patent application FR 2 984 982 in the name of the Applicant.
Le moyeu 23 comporte des cannelures internes 26, coopérant avec des cannelures externes d'un arbre 27 d'entrée d'une boîte de vitesses, également appelé arbre de sortie du dispositif d'embrayage 1 .  The hub 23 has internal splines 26 cooperating with external splines of an input shaft 27 of a gearbox, also called an output shaft of the clutch device 1.
Le mécanisme d'embrayage 19 comporte en outre un plateau de pression 28, mobile en translation axiale par rapport au plateau de réaction 4 entre une position rapprochée du plateau de réaction 4, dans laquelle lesdits plateaux 4, 28 serrent le disque de friction 22 (position embrayée), et une position écartée desdits plateaux 4, 28, dans laquelle lesdits plateaux 4, 28 libèrent le disque de friction 22 (position débrayée). Les plateaux 4, 28, le couvercle 18 et le volant 2 sont couplés en rotation les uns avec les autres.  The clutch mechanism 19 further comprises a pressure plate 28, movable in axial translation relative to the reaction plate 4 between a position close to the reaction plate 4, in which said plates 4, 28 clamp the friction disc 22 ( position engaged), and a position spaced from said plates 4, 28, wherein said plates 4, 28 release the friction disc 22 (disengaged position). The trays 4, 28, the cover 18 and the flywheel 2 are coupled in rotation with each other.
Le déplacement du plateau de pression 28 est actionné par l'intermédiaire d'un diaphragme 29 en appui sur le couvercle 18 au niveau de zones 30, comme cela est bien connu en soi.  The displacement of the pressure plate 28 is actuated by means of a diaphragm 29 bearing on the cover 18 at zones 30, as is well known per se.
Le dispositif d'embrayage 1 comporte de plus des moyens d'amortissement pendulaires 31 comprenant un support 32 s'étendant radialement. La partie radialement interne du support 32 comporte des trous 33 servant au montage de rivets 34. La première partie 3 du volant 2 comporte des trous 40 servant au passage d'un outil de rivetage, pour la mise en place des rivets 34.  The clutch device 1 further comprises pendular damping means 31 comprising a support 32 extending radially. The radially inner portion of the support 32 has holes 33 for mounting rivets 34. The first portion 3 of the flywheel 2 has holes 40 for the passage of a riveting tool, for the establishment of the rivets 34.
Le support 32 est monté pivotant autour de la surface externe 10 du rebord 9 de la première partie 3 du volant 2, par l'intermédiaire d'un palier, tel par exemple qu'un palier lisse 35. Des masses pendulaires 36 sont montées par paires sur la partie radialement externe du support 32, les masses 36 d'une même paire étant montées en regard l'une de l'autre et de part et d'autre du support 32. Les masses 36 comportent des trous oblongs en forme d'arc, dans lesquels sont engagées les extrémités de rouleaux 38 (figure 2). Les zones médianes des rouleaux 38 sont engagées dans des trous oblongs en forme d'arc du support 32. D'autres types de montage, connus de l'homme du métier, peuvent également être utilisés afin de monter les masses pendulaires 36 sur le support 32. The support 32 is pivotally mounted around the outer surface 10 of the flange 9 of the first part 3 of the wheel 2, via a Bearing, such as for example a sliding bearing 35. Pendular masses 36 are mounted in pairs on the radially outer portion of the support 32, the masses 36 of the same pair being mounted facing each other and on either side of the support 32. The masses 36 comprise arc-shaped elongated holes into which the ends of the rollers 38 are engaged (FIG. 2). The median regions of the rollers 38 are engaged in arcuate oblong holes of the support 32. Other types of assembly, known to those skilled in the art, can also be used to mount the pendular masses 36 on the support 32.
Lors de la rotation du support 32, les masses 36 sont ainsi animées d'un mouvement pendulaire par rapport au support 32, les trajectoires des masses 36 étant notamment dépendantes des formes des trous oblongs précités.  During the rotation of the support 32, the masses 36 are thus driven in a pendular motion relative to the support 32, the trajectories of the masses 36 being in particular dependent on the shapes of the aforementioned oblong holes.
Un organe de liaison 41 relie le support 32 à l'arbre d'entrée 27 de la boîte de vitesses. Cet organe de liaison 41 , mieux visible aux figures 3 à 5, comporte une tôle métallique 42 fine et flexible, d'épaisseur comprise entre 0,4 et 1 ,5 mm. La périphérie radialement externe de la tôle 42 comporte des trous 43 permettant le passage des rivets 34, de manière à fixer la tôle 42 sur le support 32. La périphérie radialement interne de la tôle 42 est fixée, par exemple par rivetage, à une bague 44.  A connecting member 41 connects the support 32 to the input shaft 27 of the gearbox. This connecting member 41, better visible in Figures 3 to 5, comprises a metal sheet 42 thin and flexible, with a thickness of between 0.4 and 1.5 mm. The radially outer periphery of the plate 42 comprises holes 43 allowing the rivets 34 to pass, so as to fix the plate 42 on the support 32. The radially inner periphery of the plate 42 is fixed, for example by riveting, to a ring 44.
Plus particulièrement, la bague 44 comporte des cannelures 45 à sa périphérie radialement interne, coopérant avec des cannelures complémentaires 45 de l'arbre de sortie 27. Lesdites cannelures 45, 46 sont dimensionnées de manière à prévoir un jeu de montage entre elles. La bague 44 comporte en outre un logement annulaire 47 (figure 4), débouchant à l'amont, délimité extérieurement par un rebord cylindrique 48 s'étendant vers l'amont. Des pattes 49 s'étendent radialement en périphérie radialement externe de la bague 44, chaque patte 49 comportant un trou 50 servant à l'engagement d'un rivet 51 , monté dans un trou correspondant 52 de la périphérie radialement interne de la tôle 42. La périphérie radialement interne de la tôle 42 comporte également des trous 53 permettant le passage des vis 7. More particularly, the ring 44 has grooves 45 at its radially inner periphery, cooperating with complementary splines 45 of the output shaft 27. The said grooves 45, 46 are dimensioned so as to provide a set of mounting between them. The ring 44 further comprises an annular housing 47 (Figure 4), opening upstream, delimited externally by a cylindrical rim 48 extending upstream. Tabs 49 extend radially at the radially outer periphery of the ring 44, each tab 49 having a hole 50 for engaging a rivet 51, mounted in a corresponding hole 52 of the radially inner periphery of the plate 42. The periphery radially internal of the plate 42 also has holes 53 allowing the passage of the screws 7.
La bague 44 comporte également quatre fenêtres oblongues 54, chaque fenêtre 54 étant délimitée par deux faces d'extrémité 55 et deux faces longitudinales 56, respectivement radialement interne et externe (figure 3). Les fenêtres 54 sont orientées sensiblement perpendiculairement à la direction radiale et débouchent de part et d'autre de la bague 44. En particulier, les fenêtres 54 débouchent à l'amont dans le logement annulaire 47. La périphérie radialement interne de la tôle 42, en appui sur la face amont de la bague 44, ferme l'extrémité amont des fenêtres 54.  The ring 44 also comprises four oblong windows 54, each window 54 being delimited by two end faces 55 and two longitudinal faces 56, respectively radially inner and outer (Figure 3). The windows 54 are oriented substantially perpendicular to the radial direction and open on either side of the ring 44. In particular, the windows 54 open upstream in the annular housing 47. The radially inner periphery of the sheet 42, resting on the upstream face of the ring 44, closes the upstream end of the windows 54.
Un organe de rattrapage de jeu 57, se présentant également sous la forme d'une bague, est monté pivotant dans le logement 47. Le diamètre de l'organe de rattrapage de jeu 57 correspond sensiblement au diamètre du logement 47, de manière à ce que le rebord 48 de la bague 44 guide en rotation l'organe de rattrapage de jeu 57. La périphérie radialement interne de l'organe de rattrapage de jeu 57 comporte des cannelures 58, destinées à coopérer avec les cannelures 46 de l'arbre de sortie 27. L'organe de rattrapage de jeu 57 comporte enfin quatre fenêtres 59, de forme et d'orientation similaires à celles 54 de la bague 44, disposées en regard des fenêtres 54 de la bague 44 et débouchant uniquement sur la face aval de l'organe de rattrapage de jeu 57. Des lumières oblongues 60, de plus faibles dimensions que les fenêtres 59, débouchent au niveau de la face amont de l'organe de rattrapage de jeu 57 et dans les fenêtres 59. L'organe de rattrapage de jeu 57 est maintenu axialement dans le logement annulaire 47 de la bague 44, par l'intermédiaire d'un anneau d'arrêt élastique fendu 61 , du type circlips, engagé dans une gorge ménagée dans la paroi radialement interne du rebord 48 de la bague 44.  A slack adjuster 57, also in the form of a ring, is pivotally mounted in the housing 47. The diameter of the slack adjuster 57 substantially corresponds to the diameter of the housing 47, so that that the rim 48 of the ring 44 guides in rotation the play-catching member 57. The radially inner periphery of the play-catching member 57 comprises splines 58 intended to cooperate with the splines 46 of the spindle output 27. The play catch member 57 finally has four windows 59, similar in shape and orientation to those 54 of the ring 44, arranged facing windows 54 of the ring 44 and opening only on the downstream face of the catch-up member 57. Oblong slots 60, smaller than the windows 59, open at the upstream face of the play-catching member 57 and in the windows 59. The catch-up member 57 is maintained axi in the annular housing 47 of the ring 44, via a split resilient locking ring 61 of the circlip type engaged in a groove in the radially inner wall of the flange 48 of the ring 44.
Des ressorts hélicoïdaux de compression 62 sont montés dans les fenêtres 54, 59, une extrémité de chaque ressort 62 prenant appui sur l'une des faces d'extrémité 55 de la fenêtre correspondante 54 de la bague 44, l'autre extrémité du ressort prenant appui sur la face d'extrémité opposée 55 de la fenêtre correspondante 59 de l'organe de rattrapage de jeu 57. Les ressorts 62 exercent une précharge ou un couple sur l'organe de rattrapage de jeu 57 de telle manière que, une fois la bague 44 et l'organe de rattrapage de jeu 57 montés autour des cannelures 46 de l'arbre 27, les ressorts 62 sollicitent l'organe de rattrapage de jeu 57 vers une position de verrouillage dans laquelle il contraint les cannelures 45 de la bague 44 contre les cannelures 46 de l'arbre de sortie 27. Le couple de rappel exercé par les ressorts 62 est par exemple supérieur à 15 N.m., de préférence par exemple compris entre 15 et 100 N.m. Coil compression springs 62 are mounted in the windows 54, 59, one end of each spring 62 bearing on one of the end faces 55 of the corresponding window 54 of the ring 44, the other end of the spring bearing on the opposite end face 55 of the corresponding window 59 of the play catch member 57. The springs 62 exert a preload or a torque on the play catch member 57 so that, once the ring 44 and the play catch member 57 mounted around the splines 46 of the shaft 27, the springs 62 urge the clearance member 57 to a locking position in which it constrains the splines 45 of the ring 44 against the splines 46 of the output shaft 27. The restoring torque exerted by the springs 62 is for example greater than 15 Nm, preferably for example between 15 and 100 Nm
Lorsque l'on souhaite retirer le module, formé par exemple par la première partie 3 du volant 2 et les moyens d'amortissement pendulaires 31 , de l'arbre 27, il convient de faire pivoter légèrement l'organe de rattrapage de jeu 57 à encontre du couple de rappel exercé par les ressorts 62, vers une position dite de déverrouillage. Pour cela, les lumières 60 peuvent former des zones de prise pour un outillage, permettant de déplacer l'organe de rattrapage de jeu 57 vers sa position de déverrouillage. Les lumières 60 sont accessibles depuis l'amont, après retrait du volant 2 par rapport au vilebrequin 8.  When it is desired to remove the module, formed for example by the first part 3 of the flywheel 2 and the pendular damping means 31, from the shaft 27, it is necessary to slightly rotate the play-catching member 57 to against the return torque exerted by the springs 62, to a so-called unlocking position. For this, the lights 60 can form gripping areas for a tool, for moving the play catch member 57 to its unlocked position. The lights 60 are accessible from upstream, after removal of the flywheel 2 relative to the crankshaft 8.
Lors du fonctionnement du dispositif d'embrayage 1 , la rotation du vilebrequin 8 entraîne celle de l'arbre 27, en position embrayée du mécanisme d'embrayage 19. Lors des phases de débrayage (changement du rapport de vitesses, par exemple), les vitesses de rotation de l'arbre 27 et du volant 2 peuvent être différentes l'une de l'autre. Dans tous les cas, la rotation de l'arbre 27 entraîne la rotation du support 32 équipé des masses pendulaires 36, par l'intermédiaire de l'organe de liaison 41 . Comme indiqué précédemment, l'efficacité de ces moyens d'amortissement pendulaires 31 n'est pas affectée par un déplacement du moyeu 23, dû notamment à une usure des garnitures 21 du disque de friction 22 ou à un rotulage du moyeu 23 sur l'arbre 27. Par ailleurs, le caractère flexible de la tôle 42 permet d'éviter que les phénomènes de flexion de l'arbre 27 affectent le comportement et l'efficacité des moyens d'amortissement pendulaires 31 . Enfin, l'organe de rattrapage de jeu 57 permet de rattraper le jeu entre les cannelures 45 de la bague 44 et celles 46 de l'arbre 27, de manière à limiter le bruit et à garantir l'efficacité des moyens d'amortissement pendulaires 31 . During operation of the clutch device 1, the rotation of the crankshaft 8 drives that of the shaft 27, in the engaged position of the clutch mechanism 19. During the declutching phases (gear ratio change, for example), the rotational speeds of the shaft 27 and the flywheel 2 may be different from each other. In all cases, the rotation of the shaft 27 causes the rotation of the support 32 equipped with the pendular masses 36, via the connecting member 41. As indicated above, the efficiency of these pendular damping means 31 is not affected by a displacement of the hub 23, due in particular to a wear of the linings 21 of the friction disc 22 or a swiveling of the hub 23 on the 27. Moreover, the flexible nature of the sheet 42 makes it possible to prevent the bending phenomena of the shaft 27 affect the behavior and efficiency of the pendulum damping means 31. Finally, the play-catching member 57 makes it possible to make up the clearance between the splines 45 of the ring 44 and those 46 of the shaft 27, so as to limit the noise and to guarantee the efficiency of the pendulum damping means 31.
Les figures 7 à 1 1 illustrent une deuxième forme de réalisation du dispositif d'embrayage 1 selon l'invention. Celui-ci diffère de celui décrit des figures 1 à 6, en ce que les moyens d'amortissement pendulaires 31 comportent un support 32 monté directement sur l'arbre de sortie 27, et non plus autour d'un rebord du volant 2. Le support 32 s'étend radialement vers l'extérieur pour se loger entre les volants et limiter les mouvements angulaires (contact sur le voile de support et non sur les masses). Comme précédemment, les masses pendulaires 36 sont montées en partie radialement externe du support 32, de part et d'autre du support 32. Les cannelures 45 et le logement annulaire 47 sont formés directement en partie radialement interne du support 32, l'organe de rattrapage de jeu 57 étant, comme précédemment, monté dans le logement annulaire 47 délimité extérieurement par le rebord 48. De même, comme précédemment, l'organe de rattrapage de jeu 57 est rappelé par les ressorts 62, vers sa position de verrouillage.  Figures 7 to 1 1 illustrate a second embodiment of the clutch device 1 according to the invention. This differs from that described in FIGS. 1 to 6, in that the pendular damping means 31 comprise a support 32 mounted directly on the output shaft 27, and no longer around a flange of the flywheel 2. support 32 extends radially outwardly to fit between the flywheels and limit angular movements (contact on the support web and not on the masses). As previously, the pendular masses 36 are mounted in part radially external of the support 32, on either side of the support 32. The grooves 45 and the annular housing 47 are formed directly in the radially inner portion of the support 32, the Grip catch 57 is, as previously, mounted in the annular housing 47 externally bounded by the rim 48. Similarly, as before, the play catch member 57 is biased by the springs 62 towards its locking position.
Une tôle 63 est fixée en partie médiane du support (figure 7). Cette tôle 63 s'étend radialement vers l'extérieur et forme un élément de protection thermique (déflecteur) et de protection contre les poussières, notamment provenant des garnitures de friction. Des trous 64 sont ménagés dans le support 32, de manière à permettre le passage des vis 7.  A sheet 63 is fixed in the middle part of the support (Figure 7). This sheet 63 extends radially outwardly and forms a thermal protection element (baffle) and protection against dust, especially from friction linings. Holes 64 are formed in the support 32, so as to allow the passage of the screws 7.
Le montage et le démontage des moyens d'amortissement pendulaires 31 sur l'arbre 27 sont réalisés de la même manière que précédemment.  The mounting and disassembly of the pendular damping means 31 on the shaft 27 are made in the same manner as before.

Claims

REVENDICATIONS
1 . Dispositif d'embrayage (1 ) comportant un volant (2) destiné à être fixé à un arbre d'entrée, tel par exemple qu'un vilebrequin (8), et un moyeu (23) couplé en rotation à un arbre de sortie, tel par exemple qu'un arbre (27) d'entrée d'une boîte de vitesses, un mécanisme d'embrayage (19) permettant de coupler ou découpler en rotation le volant (2) et le moyeu (23), et des moyens d'amortissement (31 ) comportant un support (32) équipé de masses pendulaires (36) et couplé en rotation à l'arbre de sortie (27) par l'intermédiaire de cannelures complémentaires (45, 46) des moyens d'amortissement (31 ) et de l'arbre de sortie (27), caractérisé en ce qu'il comporte un organe de rattrapage de jeu (57) en prise avec les cannelures (46) de l'arbre de sortie (27) et monté de façon déplaçable par rapport aux moyens d'amortissement pendulaires (31 ), des moyens élastiques de rappel (62) étant montés entre lesdits moyens d'amortissement pendulaires (31 ) et ledit organe de rattrapage de jeu (57) de façon à solliciter l'organe de rattrapage de jeu (57) vers une position de verrouillage dans laquelle il contraint les cannelures (45) des moyens d'amortissement pendulaires (31 ) contre les cannelures (46) de l'arbre de sortie (27). 1. Clutch device (1) comprising a flywheel (2) intended to be fixed to an input shaft, such as for example a crankshaft (8), and a hub (23) coupled in rotation to an output shaft, such as for example a shaft (27) input to a gearbox, a clutch mechanism (19) for coupling or decoupling in rotation the flywheel (2) and the hub (23), and means damping device (31) comprising a support (32) equipped with pendulum masses (36) and rotatably coupled to the output shaft (27) by means of complementary splines (45, 46) of the damping means ( 31) and the output shaft (27), characterized in that it comprises a play-catching member (57) engaged with the splines (46) of the output shaft (27) and mounted so as to displaceable relative to the pendulum damping means (31), elastic return means (62) being mounted between said pendular damping means (31) and said catching clearance (57) so as to urge the play catch member (57) to a locking position in which it constrains the grooves (45) of the pendular damping means (31) against the grooves (46) of the output shaft (27).
2. Dispositif d'embrayage selon la revendication 1 , caractérisé en ce que l'organe de rattrapage de jeu (57) comporte une bague comprenant des cannelures (58) en prise avec les cannelures (46) de l'arbre de sortie (27).  2. A clutch device according to claim 1, characterized in that the play compensating member (57) comprises a ring comprising splines (58) engaged with the splines (46) of the output shaft (27). ).
3. Dispositif d'embrayage selon la revendication 2, caractérisé en ce que les moyens élastiques de rappel (62) exercent un couple de rappel supérieur à 15 N.m., de préférence compris entre 15 et 100 N.m sur la bague.  3. Clutch device according to claim 2, characterized in that the elastic return means (62) exert a restoring torque greater than 15 N.m., preferably between 15 and 100 Nm on the ring.
4. Dispositif d'embrayage selon l'une des revendications 1 à 3, caractérisé en ce que les moyens élastiques de rappel comportent au moins un ressort hélicoïdal (62) venant en appui, à une extrémité, sur l'organe de rattrapage de jeu (57) et, à une autre extrémité, sur les moyens d'amortissement pendulaires (31 ). 4. Clutch device according to one of claims 1 to 3, characterized in that the elastic return means comprise at least one coil spring (62) bearing, at one end, on the slack adjuster (57) and, at another end, the pendulum damping means (31).
5. Dispositif d'embrayage selon la revendication 4, caractérisé en ce que les moyens d'amortissement pendulaires (31 ) et l'organe de rattrapage de jeu (57) comportent chacun au moins une fenêtre (54, 59) servant au logement d'au moins une partie du ressort (62), les extrémités du ressort (62) venant en appui sur les extrémités correspondantes (55) des fenêtres (54, 59), de manière à solliciter l'organe de rattrapage de jeu (57) vers sa position de verrouillage.  5. Clutch device according to claim 4, characterized in that the pendulum damping means (31) and the play compensator (57) each comprise at least one window (54, 59) for housing at least a portion of the spring (62), the ends of the spring (62) bearing on the corresponding ends (55) of the windows (54, 59), so as to urge the play-catching member (57) towards its locking position.
6. Dispositif d'embrayage selon l'une des revendications 1 à 5, caractérisé en ce que les moyens d'amortissement (31 ) comportent un logement annulaire (57) dans lequel est monté et guidé en rotation ledit organe de rattrapage de jeu (54).  6. Clutch device according to one of claims 1 to 5, characterized in that the damping means (31) comprise an annular housing (57) in which is mounted and guided in rotation said play catch member ( 54).
7. Dispositif d'embrayage selon la revendication 6, caractérisé en ce que des moyens d'arrêt axial (61 ) maintiennent ledit organe de rattrapage de jeu (61 ) dans le logement annulaire (57) des moyens d'amortissement pendulaires (61 ).  Clutch device according to claim 6, characterized in that axial stop means (61) hold said play compensating member (61) in the annular housing (57) of the pendular damping means (61). .
8. Dispositif d'embrayage (1 ) selon l'une des revendications 1 à 7, caractérisé en ce que le volant (2) comporte un rebord annulaire (9) autour duquel est monté le support (32) par l'intermédiaire d'un palier (35), les moyens d'amortissement pendulaires (31 ) comportant en outre un organe de liaison (41 ) reliant le support (32) à l'arbre de sortie (27) et comportant les cannelures (45) coopérant avec les cannelures complémentaires (46) de l'arbre de sortie (26).  8. Clutch device (1) according to one of claims 1 to 7, characterized in that the flywheel (2) comprises an annular rim (9) around which is mounted the support (32) via a bearing (35), the pendular damping means (31) further comprising a connecting member (41) connecting the support (32) to the output shaft (27) and having the grooves (45) cooperating with the complementary splines (46) of the output shaft (26).
9. Dispositif d'embrayage (1 ) selon la revendication 8, caractérisé en ce que l'organe de liaison (41 ) comporte une tôle (42) s'étendant radialement entre le support (32) et l'arbre de sortie (27).  9. clutch device (1) according to claim 8, characterized in that the connecting member (41) comprises a plate (42) extending radially between the support (32) and the output shaft (27). ).
10. Dispositif d'embrayage (1 ) selon les revendications 8 et 9, caractérisé en ce que l'organe de liaison (41 ) comporte une bague (44) dont la périphérie radialement interne comporte les cannelures (45) coopérant avec les cannelures complémentaires (46) de l'arbre de sortie (27), ladite bague (44) étant fixée en périphérie radialement interne de la tôle (42), l'organe de rattrapage de jeu (57) étant mobile par rapport à ladite bague (44). 10. clutch device (1) according to claims 8 and 9, characterized in that the connecting member (41) comprises a ring (44) whose radially inner periphery comprises the grooves (45) cooperating with the complementary grooves (46) of the output shaft (27), said ring (44) being fixed at the radially inner periphery of the sheet (42), the play catch member (57) being movable relative to said ring (44).
1 1 . Dispositif d'embrayage (1 ) selon l'une des revendications 1 à 7, caractérisé en ce que le support (32) est annulaire et monté sur l'arbre de sortie (27), la périphérie radialement interne du support (32) comportant les cannelures (45) coopérant avec les cannelures complémentaires (46) de l'arbre de sortie (27), l'organe de rattrapage de jeu (57) étant mobile par rapport audit support (32).  1 1. Clutch device (1) according to one of claims 1 to 7, characterized in that the support (32) is annular and mounted on the output shaft (27), the radially inner periphery of the support (32) comprising the splines (45) cooperating with the complementary splines (46) of the output shaft (27), the play catch member (57) being movable relative to said support (32).
12. Dispositif d'embrayage (1 ) selon l'une des revendications 1 à 1 1 , caractérisé en ce que le volant (2) comporte une première partie (3), dite amont, destinée à être fixée à l'arbre d'entrée (8), et une seconde partie (4), dite aval, fixée à la première partie (3) et délimitant avec cette dernière une cavité annulaire dans laquelle sont logés, au moins en partie, le support (32) et les masses pendulaires (36).  12. Clutch device (1) according to one of claims 1 to 1 1, characterized in that the wheel (2) comprises a first portion (3), said upstream, intended to be fixed to the shaft of inlet (8), and a second portion (4), said downstream, attached to the first portion (3) and delimiting with the latter an annular cavity in which are housed, at least in part, the support (32) and the masses pendulum (36).
13. Dispositif d'embrayage (1 ) selon la revendication 12, caractérisé en ce que le mécanisme d'embrayage (19) comporte un plateau de pression (28) mobile par rapport à un plateau de réaction (4), lesdits plateaux de pression (28) et de réaction (4) étant aptes à serrer ou libérer un disque de friction (22) couplé en rotation au moyeu (23), le plateau de réaction étant formé par la seconde partie (4) du volant (2).  13. clutch device (1) according to claim 12, characterized in that the clutch mechanism (19) comprises a pressure plate (28) movable relative to a reaction plate (4), said pressure plates (28) and reaction (4) being able to clamp or release a friction disc (22) rotatably coupled to the hub (23), the reaction plate being formed by the second portion (4) of the flywheel (2).
14. Dispositif d'embrayage (1 ) selon la revendication 13, caractérisé en ce que le disque de friction (22) est couplé au moyeu par l'intermédiaire de moyens d'amortissement (24) et/ou de moyens de pré- amortissement (25).  14. clutch device (1) according to claim 13, characterized in that the friction disc (22) is coupled to the hub by means of damping means (24) and / or pre-damping means (25).
PCT/FR2014/051583 2013-06-25 2014-06-24 Clutch device, in particular for a motor vehicle WO2014207373A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112014002990.4T DE112014002990T5 (en) 2013-06-25 2014-06-24 Coupling device, in particular for a motor vehicle

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FR1356090A FR3007481B1 (en) 2013-06-25 2013-06-25 CLUTCH DEVICE, IN PARTICULAR FOR MOTOR VEHICLE
FR1356090 2013-06-25

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010054283A1 (en) * 2009-12-21 2011-06-22 Schaeffler Technologies GmbH & Co. KG, 91074 Hub for shaft-hub-connection of secondary side of dual-mass flywheel in drive train of motor vehicle, has spring element arranged for tensioning counter disk at shaft against hub disk tangential to rotation axis of shaft
DE102012213904A1 (en) * 2011-09-09 2013-03-14 Schaeffler Technologies AG & Co. KG Powertrain with helical gear and centrifugal pendulum

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010054283A1 (en) * 2009-12-21 2011-06-22 Schaeffler Technologies GmbH & Co. KG, 91074 Hub for shaft-hub-connection of secondary side of dual-mass flywheel in drive train of motor vehicle, has spring element arranged for tensioning counter disk at shaft against hub disk tangential to rotation axis of shaft
DE102012213904A1 (en) * 2011-09-09 2013-03-14 Schaeffler Technologies AG & Co. KG Powertrain with helical gear and centrifugal pendulum

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FR3007481A1 (en) 2014-12-26
FR3007481B1 (en) 2015-09-25

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