WO2009007593A1 - Device for blocking the torque variation damping shaft for the transmission of an automobile - Google Patents
Device for blocking the torque variation damping shaft for the transmission of an automobile Download PDFInfo
- Publication number
- WO2009007593A1 WO2009007593A1 PCT/FR2008/051142 FR2008051142W WO2009007593A1 WO 2009007593 A1 WO2009007593 A1 WO 2009007593A1 FR 2008051142 W FR2008051142 W FR 2008051142W WO 2009007593 A1 WO2009007593 A1 WO 2009007593A1
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- Prior art keywords
- shaft
- clutch
- flywheel
- transmission
- axial
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Classifications
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- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D13/00—Friction clutches
- F16D13/22—Friction clutches with axially-movable clutching members
- F16D13/38—Friction clutches with axially-movable clutching members with flat clutching surfaces, e.g. discs
- F16D13/46—Friction clutches with axially-movable clutching members with flat clutching surfaces, e.g. discs in which two axially-movable members, of which one is attached to the driving side and the other to the driven side, are pressed from one side towards an axially-located member
- F16D13/48—Friction clutches with axially-movable clutching members with flat clutching surfaces, e.g. discs in which two axially-movable members, of which one is attached to the driving side and the other to the driven side, are pressed from one side towards an axially-located member with means for increasing the effective force between the actuating sleeve or equivalent member and the pressure member
Definitions
- a shaft lock and torque variation damping device for a motor vehicle transmission is provided.
- the invention relates to the field of shaft locking devices for motor vehicle transmission, and in particular the locking devices of the input shaft of the transmission, as well as a use of this device.
- Patent application FR 2 870 910 describes a clutch shaft locking device for power bypass transmission. This device is not suitable for an input shaft of the transmission to be blocked when it is not already stopped.
- WO 94/24450 discloses a device where a drive disc of a shaft is connected to a clutch which is connected to a crankshaft. Such a device makes it possible both to disengage the crankshaft shaft and to dampen the torque variations when the clutch is actuated. This device does not allow to lock the shaft relative to a housing.
- the invention proposes a device capable of both blocking a shaft and damping the torque variation transmitted when the shaft is not blocked, while allowing a reduced axial space requirement.
- the shaft locking device for a motor vehicle transmission comprises a first shaft and a casing intended to be fixed on a casing of the transmission.
- the device comprises a damping means provided with a primary flywheel fixed on the first shaft, a fixed secondary flywheel rotation relative to a second shaft, and at least one damping element mounted between the two flywheels.
- the device further comprises an actuable clutch disposed between one of the flywheels and the housing of the device.
- the secondary flywheel being fixed in rotation with respect to the second shaft, the damping of the torque variations takes place directly between the first and second shafts.
- the fact of blocking one of the wheels by the clutch allows either to simultaneously block the two shafts, or to leave them free and directly connected by the damping means.
- the fact of using a portion of the damping means to block the shafts allows to leave the possibility of using the axial size of the damping means to arrange the clutch. This allows reduced axial size.
- the clutch and the damping means occupy substantially the same axial position, the damping element being radially inside the primary flywheel and the clutch being radially outside said flywheel.
- the clutch comprises a support plate provided with a fixing means on the housing, a thrust plate, movable in axial translation relative to the support plate, the two plates having two opposite friction surfaces and further comprising, between the two friction surfaces, a friction disc integral in rotation and movable in translation relative to the primary flywheel.
- the thrust plate comprises a plurality of peripheral guiding fingers cooperating with fitted openings of the support plate and axial stops of trays between the fingers and the support plate limiting the maximum axial space of the trays.
- the primary flywheel comprises, on either side of the plates, a fixed flywheel stop and a removable flywheel stop arranged axially at a distance from one another greater than the maximum axial dimensions of the clutch plates.
- the set of two support plates and two thrusts as well as the friction disk can be assembled around the primary flywheel between said flywheel stops. This allows the entire device to be secured to the first shaft.
- the device comprises both axial plateau stops and axial flywheel stops, the operation of assembling a crankshaft, equipped with the device, on a transmission makes it possible to position the vehicle independently on the one hand, on the one hand, damping means, and on the other hand, the support plate.
- the housing and the first shaft are arranged axially so that a game remains between each axial stop of the primary flywheel and the corresponding plate when the plates occupy a maximum axial space. This avoids, when the clutch is not actuated, the friction between the rotating fixed plate and the damping means movable in rotation.
- the primary flywheel comprises axially oriented peripheral grooves cooperating with the friction disc. This allows the friction disc to move axially and not to rub against the plates when the clutch is not actuated.
- the device comprises a means for actuating the clutch with a diaphragm in peripheral support on the housing, in central support on an actuating ring and in intermediate support on a stop of the thrust plate in one direction. opposite to the central and peripheral supports.
- a shaft lock device wherein the first shaft is a heat engine crankshaft, and the second shaft is an input shaft. a power bypass transmission.
- the Applicant has indeed realized that there is interest in being able to block the input shaft of a transmission electromagnetic power transmission relative to a housing. This makes it possible to use all the power of the electrical machines of the transmission for the starting phase of the vehicle. This allows the use of the engine from a certain speed of the vehicle for which it has a better thermodynamic efficiency. Blocking the input shaft without increasing the axial size of the transmission is a particularly advantageous use.
- the device comprises a damping means 1 connected on the one hand to a crankshaft 2 and on the other hand to a transmission input shaft 3.
- the device also comprises a clutch 4 located radially at a distance The damping means 1 and the clutch 4 extend perpendicularly with respect to the common axis of the crankshaft 2 and the input shaft 3.
- the damping means 1 comprises a primary flywheel 5, a secondary flywheel 6 and a plurality of springs 7.
- the primary flywheel 5 comprises a disc portion provided in a radially inner zone with fixing means on the crankshaft 2.
- the primary flywheel 5 comprises, in a radially outer zone, a skirt 11 surrounding the plurality of springs 7 and having, facing outwards, longitudinal grooves 8.
- the secondary flywheel 6 is fixed in a radially inner zone on a corrugated hub 9 co-operating with splines 10 of the input shaft 3.
- the secondary flywheel 6 has in a radially outer zone a series of arcuate lights each receiving one of the springs 7.
- a closure flange 12 is welded to the skirt 1 1 of the primary flywheel 5.
- the flange 12, the skirt 1 1 and the disc portion of the steering wheel primary 5 constitute a partially toroidal shape surrounding the springs 7.
- the springs 7 are for example coil springs whose turns of one end are supported on a rim of the lights of the secondary flywheel 6 and the opposite end is in support on not shown notches of the flange 12.
- This type of damping means makes it possible to smooth the instantaneous torque variations between the crankshaft 2 and the input shaft 3.
- the clutch 4 comprises a support plate 13 and a thrust plate 14, as well as a friction disk 15.
- the support plate 13 has a substantially annular shape in a plane perpendicular to the axis of the device and presents a series of attachment lugs 16, angularly distributed around the axis, which make it possible to immobilize the support plate 13 relative to the casing 17 of the transmission.
- the thrust plate 14 has an annular shape 18 extended in a radially outer zone by a plurality of guide fingers 19 extending perpendicularly to the plane of the ring 18, as well as a plurality of radial excrescences 20 interspersed angularly with the plurality of guide fingers 19.
- the guide fingers 19 pass through fitted slots in the support plate 13 and project from the side of the support plate 13 opposite the annular shape 18.
- the guide fingers 19 have a notch 21.
- Each of the notches 21 of the guide fingers 19 is arranged on a circle around the axis of the device and receives a single circlip 22.
- the radial protrusions 20 each receive a spring 34 resting on the support plate 13. Through the spring 34 and the circlip 22, the support plates 13 and thrust 14 are held in the separated position.
- the friction disk 15 comprises a rigid core of annular shape 23 cooperating with the grooves 8 of the skirt 1 1.
- Friction linings 24a and 24b are arranged axially on either side of the annular core 23.
- the linings 24a and 24b are next corresponding annular friction surfaces of the annular portion 18 of the thrust disk 14 and the support plate 13.
- An annular bead 25 projects in the direction of the axis of the device from the annular portion 18 of the thrust plate 14.
- a diaphragm 26 is constituted by a plurality of angular sectors 27, one side of which is fixed in the housing 17 and whose tips converge towards an actuating ring 28.
- An actuating lever 29 has in its middle part a shape cooperating with a bearing sphere 30 fixed to the casing 17 of the transmission.
- the actuating lever 29 has a short arm bearing on the actuating ring 28 and a long arm driven in translation in the direction of the axis of the device by a not shown actuator.
- the flange 12 protrudes radially from the skirt January 1 and extends over a diameter greater than the inside diameter of the inner portion 18 of the thrust plate 14.
- This protruding shape constitutes a fixed axial abutment 31 preventing the clutch 4 s escape in a first axial direction of the space around the damping means 1.
- the flutes 8 of the primary flywheel 5 have a groove in which is housed a circlip 32.
- the support plate 13 has a countersink 33 which the inside diameter is smaller than the outside diameter of the circlip 32.
- the circlip 32 constitutes a removable axial abutment complementary to the fixed axial abutment 31. The axial distance between the fixed axial abutment 31 and the circlip 32 is greater than the distance between the countersink 33 and the thrust plate 14 when the spacing between the two is maximum because of the abutment exerted by the circlip 22.
- the circlip 32 is removed and successively assembled around the damping means 1 the thrust plate 14 then the friction disc 15 and the support plate 13.
- the thrust plate 13 is passed through by the guide fingers 29 and assembles the circlip 22. Finally, it assembles the circlips 32.
- the clutch 4 and the damping means 1 constitute a unitary assembly having a plurality of internal games.
- the second and third phases previously described are distinct, it is possible to adjust independently of one another the axial positioning of the crankshaft and the drive means 1 relative to the casing 17 of the transmission and the positioning 4. In this way, a minimum clearance is maintained so that the countersink 33 fixed relative to the housing does not rub with the circlip 32 mobile in rotation. In the same way, the circlip 22 makes it possible to prevent the thrust plate 14 from rubbing with the fixed axial abutment 31.
- the actuating lever 29 and the diaphragm 26 make it possible to increase the axial displacement so that a high force can be exerted simultaneously on the entire periphery of the thrust plate 14 so that the linings 24a and 24b are pressed between the thrust plate 14 and the support plate 13. And this, until the friction force exerts a greater resistance torque to the engine torque exerted on the damping means 1 is by the transmission shaft 3, or by the crankshaft 2.
- the clutch 4 is not used as a clutch to transmit the torque of the crankshaft to the wheels of the vehicle, the clutch 4 previously described serves to lock the input shaft 3 in the starting phase of the vehicle so that the two electrical machines of the electromechanical transmission power bypass can be supported on the input shaft 3 to drive the vehicle only from the electrical machines.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
Description
Dispositif de blocage d'arbre et d'amortissement de variation de couple pour transmission de véhicule automobile. A shaft lock and torque variation damping device for a motor vehicle transmission.
L' invention concerne le domaine des dispositifs de blocage d' arbre pour transmission de véhicule automobile, et en particulier les dispositifs de blocage de l' arbre d'entrée de la transmission, ainsi qu'une utilisation de ce dispositif.The invention relates to the field of shaft locking devices for motor vehicle transmission, and in particular the locking devices of the input shaft of the transmission, as well as a use of this device.
La plupart des transmissions reliées à un vilebrequin de moteur thermique comprennent un dispositif d' amortissement disposé entre l' arbre d'entrée de la transmission et le vilebrequin. Cela permet de lisser les variations instantanées de couple auxquelles est soumis le vilebrequin du fait de la contribution de chaque piston du moteur thermique.Most transmissions connected to a crankshaft engine include a damping device disposed between the input shaft of the transmission and the crankshaft. This makes it possible to smooth the instantaneous torque variations to which the crankshaft is subjected because of the contribution of each piston of the heat engine.
La demande de brevet FR 2 870 910 décrit un dispositif de blocage d' arbre à crabot pour transmission à dérivation de puissance. Ce dispositif ne convient pas pour un arbre d' entrée de la transmission devant être bloqué alors qu' il n'est pas déj à arrêté.Patent application FR 2 870 910 describes a clutch shaft locking device for power bypass transmission. This device is not suitable for an input shaft of the transmission to be blocked when it is not already stopped.
Par la demande WO 94/24 450, on connaît un dispositif où un disque d' entraînement d'un arbre est relié à un embrayage, lequel est relié à un vilebrequin. Un tel dispositif permet à la fois de débrayer l' arbre du vilebrequin et d' amortir les variations de couple lorsque l' embrayage est actionné. Ce dispositif ne permet pas de bloquer l' arbre par rapport à un carter.WO 94/24450 discloses a device where a drive disc of a shaft is connected to a clutch which is connected to a crankshaft. Such a device makes it possible both to disengage the crankshaft shaft and to dampen the torque variations when the clutch is actuated. This device does not allow to lock the shaft relative to a housing.
L' invention propose un dispositif capable à la fois de bloquer un arbre et d' amortir la variation de couple transmis lorsque l' arbre n'est pas bloqué et ceci, tout en permettant un encombrement axial réduit.The invention proposes a device capable of both blocking a shaft and damping the torque variation transmitted when the shaft is not blocked, while allowing a reduced axial space requirement.
Selon un mode de réalisation, le dispositif de blocage d' arbre pour transmission de véhicule automobile comprend un premier arbre et un carter destiné à être fixé sur un carter de la transmission. Le dispositif comprend un moyen d' amortissement muni d'un volant primaire fixé sur le premier arbre, d'un volant secondaire fixe en rotation par rapport à un deuxième arbre, et d' au moins un élément amortisseur monté entre les deux volants . Le dispositif comprend en outre un embrayage actionnable disposé entre l'un des volants et le carter du dispositif.According to one embodiment, the shaft locking device for a motor vehicle transmission comprises a first shaft and a casing intended to be fixed on a casing of the transmission. The device comprises a damping means provided with a primary flywheel fixed on the first shaft, a fixed secondary flywheel rotation relative to a second shaft, and at least one damping element mounted between the two flywheels. The device further comprises an actuable clutch disposed between one of the flywheels and the housing of the device.
Le volant secondaire étant fixe en rotation par rapport au deuxième arbre, l' amortissement des variations de couple a lieu directement entre les premier et deuxième arbres . Le fait de bloquer l'un des volants par l' embrayage permet, soit de bloquer simultanément les deux arbres, soit de les laisser libres et reliés directement par le moyen d' amortissement. De plus, le fait d'utiliser une partie du moyen d' amortissement pur bloquer les arbres permet de laisser la possibilité d'utiliser l' encombrement axial du moyen d' amortissement pour disposer l'embrayage. Cela permet un encombrement axial réduit.The secondary flywheel being fixed in rotation with respect to the second shaft, the damping of the torque variations takes place directly between the first and second shafts. The fact of blocking one of the wheels by the clutch allows either to simultaneously block the two shafts, or to leave them free and directly connected by the damping means. In addition, the fact of using a portion of the damping means to block the shafts allows to leave the possibility of using the axial size of the damping means to arrange the clutch. This allows reduced axial size.
Avantageusement, l' embrayage et le moyen d' amortissement occupent sensiblement la même position axiale, l' élément amortisseur étant radialement à l' intérieur du volant primaire et l' embrayage étant radialement à l'extérieur dudit volant.Advantageously, the clutch and the damping means occupy substantially the same axial position, the damping element being radially inside the primary flywheel and the clutch being radially outside said flywheel.
Avantageusement, l' embrayage comprend un plateau d' appui muni d'un moyen de fixation sur le carter, un plateau de poussée, mobile en translation axiale par rapport au plateau d' appui, les deux plateaux présentant deux surfaces de friction en regard et comprenant en outre, entre les deux surfaces de friction, un disque de friction solidaire en rotation et mobile en translation par rapport au volant primaire.Advantageously, the clutch comprises a support plate provided with a fixing means on the housing, a thrust plate, movable in axial translation relative to the support plate, the two plates having two opposite friction surfaces and further comprising, between the two friction surfaces, a friction disc integral in rotation and movable in translation relative to the primary flywheel.
Avantageusement, le plateau de poussée comprend une pluralité de doigts de guidage périphériques coopérant avec des ouvertures ajustées du plateau d' appui et des butées axiales de plateaux entre les doigts et le plateau d' appui limitant l'encombrement axial maximum des plateaux.Advantageously, the thrust plate comprises a plurality of peripheral guiding fingers cooperating with fitted openings of the support plate and axial stops of trays between the fingers and the support plate limiting the maximum axial space of the trays.
Selon une variante, le volant primaire comprend, de part et d' autre des plateaux, une butée de volant fixe et une butée de volant amovible disposées axialement à une distance l'une de l' autre supérieure à l' encombrement axial maximum des plateaux d' embrayage.According to one variant, the primary flywheel comprises, on either side of the plates, a fixed flywheel stop and a removable flywheel stop arranged axially at a distance from one another greater than the maximum axial dimensions of the clutch plates.
Grâce aux butées fixes et amovibles du volant primaire, l' ensemble des deux plateaux d' appui et deux poussées ainsi que le disque de friction peuvent être assemblés autour du volant primaire entre lesdites butées de volant. Cela permet à l' ensemble du dispositif d' être solidaire du premier arbre. Lorsque le dispositif comprend à la fois des butées axiales de plateau et des butées axiales de volant, l' opération d' assemblage d'un vilebrequin, équipé du dispositif, sur une transmission permet de positionner de manière indépendante, d'une part, le moyen d' amortissement, et d' autre part, le plateau d' appui.Thanks to the fixed and removable stops of the primary flywheel, the set of two support plates and two thrusts as well as the friction disk can be assembled around the primary flywheel between said flywheel stops. This allows the entire device to be secured to the first shaft. When the device comprises both axial plateau stops and axial flywheel stops, the operation of assembling a crankshaft, equipped with the device, on a transmission makes it possible to position the vehicle independently on the one hand, on the one hand, damping means, and on the other hand, the support plate.
Avantageusement, le carter et le premier arbre sont disposés axialement de manière qu'un jeu subsiste entre chaque butée axiale du volant primaire et le plateau correspondant lorsque les plateaux occupent un encombrement axial maximum. Cela évite, lorsque l' embrayage n' est pas actionné, les frottements entre le plateau fixe en rotation et le moyen d' amortissement mobile en rotation.Advantageously, the housing and the first shaft are arranged axially so that a game remains between each axial stop of the primary flywheel and the corresponding plate when the plates occupy a maximum axial space. This avoids, when the clutch is not actuated, the friction between the rotating fixed plate and the damping means movable in rotation.
Avantageusement, le volant primaire comprend des cannelures périphériques orientées axialement coopérant avec le disque de friction. Cela permet au disque de friction d' être mobile axialement et de ne pas frotter contre les plateaux lorsque l' embrayage n' est pas actionné.Advantageously, the primary flywheel comprises axially oriented peripheral grooves cooperating with the friction disc. This allows the friction disc to move axially and not to rub against the plates when the clutch is not actuated.
Selon une autre variante, le dispositif comprend un moyen d' actionnement de l'embrayage avec un diaphragme en appui périphérique sur le carter, en appui central sur un anneau d' actionnement et en appui intermédiaire sur une butée du plateau de poussée selon une direction opposée aux appuis central et périphérique. Cela permet de démultiplier l' effort axial exercé par les plateaux sur le disque de friction.According to another variant, the device comprises a means for actuating the clutch with a diaphragm in peripheral support on the housing, in central support on an actuating ring and in intermediate support on a stop of the thrust plate in one direction. opposite to the central and peripheral supports. This makes it possible to increase the axial force exerted by the plates on the friction disc.
Selon un autre aspect de l' invention, celle-ci porte sur une utilisation d'un dispositif de blocage d' arbre, dans laquelle le premier arbre est un vilebrequin de moteur thermique, et le deuxième arbre est un arbre d' entrée d'une transmission à dérivation de puissance. Le demandeur s' est en effet rendu compte qu'il y a intérêt à pouvoir bloquer l' arbre d'entrée d'une transmission électromagnétique à dérivation de puissance par rapport à un carter. Cela permet de pouvoir utiliser toute la puissance des machines électriques de la transmission pour la phase de démarrage du véhicule. Cela permet d'utiliser le moteur thermique à partir d'une certaine vitesse du véhicule pour lequel celui-ci présente un meilleur rendement thermodynamique. Le fait de bloquer l' arbre d' entrée sans augmenter l' encombrement axial de la transmission est une utilisation particulièrement avantageuse.According to another aspect of the invention, it relates to a use of a shaft lock device, wherein the first shaft is a heat engine crankshaft, and the second shaft is an input shaft. a power bypass transmission. The Applicant has indeed realized that there is interest in being able to block the input shaft of a transmission electromagnetic power transmission relative to a housing. This makes it possible to use all the power of the electrical machines of the transmission for the starting phase of the vehicle. This allows the use of the engine from a certain speed of the vehicle for which it has a better thermodynamic efficiency. Blocking the input shaft without increasing the axial size of the transmission is a particularly advantageous use.
D ' autres caractéristiques et avantages de l' invention apparaîtront à la lecture de la description détaillée d'un mode de réalisation pris à titre d' exemple non limitatif et illustré par le dessin annexé, selon lequel la figure est une coupe axiale d'un dispositif de l' invention.Other features and advantages of the invention will appear on reading the detailed description of an embodiment taken by way of non-limiting example and illustrated by the appended drawing, in which the figure is an axial section of a device of the invention.
Comme illustré sur la figure, le dispositif comprend un moyen d' amortissement 1 relié d'une part à un vilebrequin 2 et d' autre part à un arbre d'entrée de transmission 3. Le dispositif comprend également un embrayage 4 situé radialement à l' extérieur du moyen d' amortissement 1. L' ensemble du moyen d' amortissement 1 et de l' embrayage 4 s' étend perpendiculairement par rapport à l' axe commun du vilebrequin 2 et de l' arbre d' entrée 3.As illustrated in the figure, the device comprises a damping means 1 connected on the one hand to a crankshaft 2 and on the other hand to a transmission input shaft 3. The device also comprises a clutch 4 located radially at a distance The damping means 1 and the clutch 4 extend perpendicularly with respect to the common axis of the crankshaft 2 and the input shaft 3.
Le moyen d' amortissement 1 comprend un volant primaire 5, un volant secondaire 6 et une pluralité de ressorts 7. Le volant primaire 5 comprend une partie discale munie dans une zone radialement intérieure de moyens de fixation sur le vilebrequin 2. Le volant primaire 5 comprend, dans une zone radialement extérieure, une jupe 1 1 entourant la pluralité de ressorts 7 et présentant, tournées vers l' extérieur, des cannelures longitudinales 8. Le volant secondaire 6 est fixé dans une zone radialement intérieure sur un moyeu cannelé 9 coopérant avec des cannelures 10 de l' arbre d' entrée 3. Le volant secondaire 6 présente dans une zone radialement extérieure une série de lumières en forme d' arc de cercle recevant chacune un des ressorts 7. Un flasque de fermeture 12 est soudé sur la jupe 1 1 du volant primaire 5. Le flasque 12, la jupe 1 1 et la partie discale du volant primaire 5 constituent une forme partiellement torique entourant les ressorts 7. Les ressorts 7 sont par exemple des ressorts à boudin dont les spires d'une extrémité sont en appui sur un rebord des lumières du volant secondaire 6 et dont l' extrémité opposée est en appui sur des crans non représentés du flasque 12. Ainsi, le couple est transmis du vilebrequin 2 à l' arbre d' entrée 3 en passant par la compression des ressorts entre lesdites surfaces d' appui non visibles sur la figure. Ce type de moyens d' amortissement permet de lisser les variations de couple instantanées entre le vilebrequin 2 et l' arbre d' entrée 3.The damping means 1 comprises a primary flywheel 5, a secondary flywheel 6 and a plurality of springs 7. The primary flywheel 5 comprises a disc portion provided in a radially inner zone with fixing means on the crankshaft 2. The primary flywheel 5 comprises, in a radially outer zone, a skirt 11 surrounding the plurality of springs 7 and having, facing outwards, longitudinal grooves 8. The secondary flywheel 6 is fixed in a radially inner zone on a corrugated hub 9 co-operating with splines 10 of the input shaft 3. The secondary flywheel 6 has in a radially outer zone a series of arcuate lights each receiving one of the springs 7. A closure flange 12 is welded to the skirt 1 1 of the primary flywheel 5. The flange 12, the skirt 1 1 and the disc portion of the steering wheel primary 5 constitute a partially toroidal shape surrounding the springs 7. The springs 7 are for example coil springs whose turns of one end are supported on a rim of the lights of the secondary flywheel 6 and the opposite end is in support on not shown notches of the flange 12. Thus, the torque is transmitted from the crankshaft 2 to the input shaft 3 through the compression of the springs between said bearing surfaces not visible in the figure. This type of damping means makes it possible to smooth the instantaneous torque variations between the crankshaft 2 and the input shaft 3.
L' embrayage 4 comprend un plateau d' appui 13 et un plateau de poussée 14, ainsi qu'un disque de friction 15. Le plateau d' appui 13 présente une forme essentiellement annulaire dans un plan perpendiculaire à l' axe du dispositif et présente une série d' oreilles de fixation 16, réparties angulairement autour de l' axe, qui permettent d' immobiliser le plateau d' appui 13 par rapport au carter 17 de la transmission. Le plateau de poussée 14 présente une forme annulaire 18 prolongée dans une zone radialement extérieure par une pluralité de doigts de guidage 19 s' étendant perpendiculairement au plan de l' anneau 18, ainsi qu'une pluralité d' excroissances radiales 20 intercalées angulairement avec la pluralité de doigts de guidage 19. Les doigts de guidage 19 traversent des lumières ajustées ménagées dans le plateau d' appui 13 et font saillie du côté du plateau d' appui 13 opposé à la forme annulaire 18. Les doigts de guidage 19 présentent une encoche 21. Chacune des encoches 21 des doigts de guidage 19 est disposée sur un cercle autour de l' axe du dispositif et reçoit un circlips unique 22. Les excroissances radiales 20 reçoivent chacune un ressort 34 en appui sur le plateau d' appui 13. Grâce au ressort 34 et au circlips 22, les plateaux d' appui 13 et de poussée 14 sont maintenus en position écartée.The clutch 4 comprises a support plate 13 and a thrust plate 14, as well as a friction disk 15. The support plate 13 has a substantially annular shape in a plane perpendicular to the axis of the device and presents a series of attachment lugs 16, angularly distributed around the axis, which make it possible to immobilize the support plate 13 relative to the casing 17 of the transmission. The thrust plate 14 has an annular shape 18 extended in a radially outer zone by a plurality of guide fingers 19 extending perpendicularly to the plane of the ring 18, as well as a plurality of radial excrescences 20 interspersed angularly with the plurality of guide fingers 19. The guide fingers 19 pass through fitted slots in the support plate 13 and project from the side of the support plate 13 opposite the annular shape 18. The guide fingers 19 have a notch 21. Each of the notches 21 of the guide fingers 19 is arranged on a circle around the axis of the device and receives a single circlip 22. The radial protrusions 20 each receive a spring 34 resting on the support plate 13. Through the spring 34 and the circlip 22, the support plates 13 and thrust 14 are held in the separated position.
Le disque de friction 15 comprend une âme rigide de forme annulaire 23 coopérant avec les cannelures 8 de la jupe 1 1. Des garnitures de friction 24a et 24b sont disposées axialement de part et d' autre de l' âme annulaire 23. Les garnitures 24a et 24b sont en regard de surfaces annulaires de friction correspondantes de la partie annulaire 18 du disque de poussée 14 et du plateau d' appui 13.The friction disk 15 comprises a rigid core of annular shape 23 cooperating with the grooves 8 of the skirt 1 1. Friction linings 24a and 24b are arranged axially on either side of the annular core 23. The linings 24a and 24b are next corresponding annular friction surfaces of the annular portion 18 of the thrust disk 14 and the support plate 13.
Un bourrelet annulaire 25 fait saillie dans la direction de l' axe du dispositif de la partie annulaire 18 du plateau de poussée 14.An annular bead 25 projects in the direction of the axis of the device from the annular portion 18 of the thrust plate 14.
Un diaphragme 26 est constitué d'une pluralité de secteurs angulaires 27 dont un côté est fixé dans le carter 17 et dont les pointes convergent vers un anneau d' actionnement 28.A diaphragm 26 is constituted by a plurality of angular sectors 27, one side of which is fixed in the housing 17 and whose tips converge towards an actuating ring 28.
Un levier d' actionnement 29 présente dans sa partie médiane une forme coopérant avec une sphère d' appui 30 fixée sur le carter 17 de la transmission. Le levier d' actionnement 29 présente un bras court prenant appui sur l' anneau d' actionnement 28 et un bras long entraîné en translation dans le sens de l' axe du dispositif par un actionneur non représenté.An actuating lever 29 has in its middle part a shape cooperating with a bearing sphere 30 fixed to the casing 17 of the transmission. The actuating lever 29 has a short arm bearing on the actuating ring 28 and a long arm driven in translation in the direction of the axis of the device by a not shown actuator.
Le flasque 12 fait saillie radialement de la jupe 1 1 et s ' étend sur un diamètre supérieur au diamètre intérieur de la partie intérieure 18 du plateau de poussée 14. Cette forme en saillie constitue une butée axiale fixe 31 empêchant l' embrayage 4 de s ' échapper selon une première direction axiale de l' espace situé autour du moyen d' amortissement 1. Les cannelures 8 du volant primaire 5 présentent une gorge dans laquelle vient se loger un circlips 32. Le plateau d' appui 13 présente un lamage 33 dont le diamètre intérieur est inférieur au diamètre extérieur du circlips 32. Le circlips 32 constitue une butée axiale amovible complémentaire de la butée axiale fixe 31. La distance axiale entre la butée axiale fixe 31 et le circlips 32 est supérieure à la distance entre le lamage 33 et le plateau de poussée 14 lorsque l' écartement entre les deux est maximum en raison de la butée exercée par le circlips 22.The flange 12 protrudes radially from the skirt January 1 and extends over a diameter greater than the inside diameter of the inner portion 18 of the thrust plate 14. This protruding shape constitutes a fixed axial abutment 31 preventing the clutch 4 s escape in a first axial direction of the space around the damping means 1. The flutes 8 of the primary flywheel 5 have a groove in which is housed a circlip 32. The support plate 13 has a countersink 33 which the inside diameter is smaller than the outside diameter of the circlip 32. The circlip 32 constitutes a removable axial abutment complementary to the fixed axial abutment 31. The axial distance between the fixed axial abutment 31 and the circlip 32 is greater than the distance between the countersink 33 and the thrust plate 14 when the spacing between the two is maximum because of the abutment exerted by the circlip 22.
On va maintenant décrire l' assemblage du dispositif dans le carter 17 de la transmission. Dans une première phase, le circlips 32 est enlevé et on assemble successivement autour du moyen d' amortissement 1 le plateau de poussée 14 puis le disque de friction 15 et le plateau d' appui 13. On fait traverser le plateau d' appui 13 par les doigts de guidage 29 et on assemble le circlips 22. Enfin, on assemble le circlips 32. A l' issue de cette première phase, l' embrayage 4 et le moyen d' amortissement 1 constituent un ensemble solidaire présentant de mutliples jeux intérieurs .We will now describe the assembly of the device in the housing 17 of the transmission. In a first phase, the circlip 32 is removed and successively assembled around the damping means 1 the thrust plate 14 then the friction disc 15 and the support plate 13. The thrust plate 13 is passed through by the guide fingers 29 and assembles the circlip 22. Finally, it assembles the circlips 32. At the end of this first phase, the clutch 4 and the damping means 1 constitute a unitary assembly having a plurality of internal games.
Dans une deuxième phase, on assemble le plateau d' appui 13 sur le vilebrequin 2 de sorte que le dispositif est solidaire du bloc moteur. Lorsque l' on approche la transmission du bloc moteur, l' arbre d' entrée 3 de la transmission traverse l' anneau d' actionnement 18 et vient pénétrer dans le moyeu cannelé 9. Puis le carter de la transmission 17 est fixé sur le bloc moteur non représenté et solidaire axialement du vilebrequin 2.In a second phase, it assembles the support plate 13 on the crankshaft 2 so that the device is integral with the engine block. When approaching the transmission of the engine block, the input shaft 3 of the transmission passes through the actuating ring 18 and penetrates into the splined hub 9. Then the transmission case 17 is fixed on the block motor not shown and axially secured to the crankshaft 2.
Enfin dans une troisième phase, on fixe les oreilles de fixationFinally in a third phase, we fix the fixing ears
16 sur le carter 17 grâce à un moyen de fixation 34.16 on the housing 17 by means of fixing means 34.
Grâce au fait que les deuxième et troisième phases précédemment décrites soient distinctes, il est possible de régler indépendamment l'un de l' autre le positionnement axial du vilebrequin et du moyen d' entraînement 1 par rapport au carter 17 de la transmission et le positionnement axial de l' embrayage 4. De cette manière, un jeu minimum est maintenu pour que le lamage 33 fixe par rapport au carter ne frotte pas avec le circlips 32 mobile en rotation. De la même manière, le circlips 22 permet d' empêcher le plateau de poussée 14 de frotter avec la butée axiale fixe 31.Thanks to the fact that the second and third phases previously described are distinct, it is possible to adjust independently of one another the axial positioning of the crankshaft and the drive means 1 relative to the casing 17 of the transmission and the positioning 4. In this way, a minimum clearance is maintained so that the countersink 33 fixed relative to the housing does not rub with the circlip 32 mobile in rotation. In the same way, the circlip 22 makes it possible to prevent the thrust plate 14 from rubbing with the fixed axial abutment 31.
On va maintenant décrire le fonctionnement du dispositif. Lorsque le levier d' actionnement 29 pivote autour de la sphère d' appui 30, l' anneau d' actionnement 28 est déplacé axialement vers la droite de la figure, et les secteurs angulaires 27 prennent appui sur le carterWe will now describe the operation of the device. When the actuating lever 29 pivots around the bearing sphere 30, the actuating ring 28 is moved axially to the right of the figure, and the angular sectors 27 are supported on the casing
17 pour appuyer sur le bourrelet annulaire 25. Le levier d' actionnement 29 et le diaphragme 26 permettent de démultiplier le déplacement axial de manière qu'un effort élevé puisse être exercé simultanément sur tout le pourtour du plateau de poussée 14 de manière que les garnitures 24a et 24b soient pressées entre le plateau de poussée 14 et le plateau d' appui 13. Et ceci, jusqu' à ce que l' effort de frottement exerce un couple de résistance supérieur au couple moteur exercé sur le moyen d' amortissement 1 soit par l' arbre de transmission 3, soit par le vilebrequin 2. Dans une utilisation du dispositif avec une transmission à dérivation de puissance, l' embrayage 4 ne sert pas d' embrayage pour transmettre le couple du vilebrequin aux roues du véhicule, l' embrayage 4 précédemment décrit sert à bloquer l' arbre d' entrée 3 dans la phase de démarrage du véhicule de manière que les deux machines électriques de la transmission électromécanique à dérivation de puissance puissent prendre appui sur l' arbre d' entrée 3 pour entraîner le véhicule uniquement à partir des machines électriques. 17 to press the annular bead 25. The actuating lever 29 and the diaphragm 26 make it possible to increase the axial displacement so that a high force can be exerted simultaneously on the entire periphery of the thrust plate 14 so that the linings 24a and 24b are pressed between the thrust plate 14 and the support plate 13. And this, until the friction force exerts a greater resistance torque to the engine torque exerted on the damping means 1 is by the transmission shaft 3, or by the crankshaft 2. In a use of the device with a power bypass transmission, the clutch 4 is not used as a clutch to transmit the torque of the crankshaft to the wheels of the vehicle, the clutch 4 previously described serves to lock the input shaft 3 in the starting phase of the vehicle so that the two electrical machines of the electromechanical transmission power bypass can be supported on the input shaft 3 to drive the vehicle only from the electrical machines.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0756424 | 2007-07-11 | ||
| FR0756424A FR2918728B1 (en) | 2007-07-11 | 2007-07-11 | SHAFT LOCKING AND TORQUE VARIATION DAMPING DEVICE FOR TRANSMISSION OF MOTOR VEHICLE. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2009007593A1 true WO2009007593A1 (en) | 2009-01-15 |
Family
ID=39272360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2008/051142 Ceased WO2009007593A1 (en) | 2007-07-11 | 2008-06-25 | Device for blocking the torque variation damping shaft for the transmission of an automobile |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR2918728B1 (en) |
| WO (1) | WO2009007593A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4323392A1 (en) * | 1992-08-05 | 1994-02-10 | Fichtel & Sachs Ag | Arrangement for attaching a clutch to a crankshaft |
| GB2296959A (en) * | 1993-03-26 | 1996-07-17 | Fichtel & Sachs Ag | Clutch assembly and crankshaft attachment means having torque transmitting dowels |
| GB2340559A (en) * | 1996-03-16 | 2000-02-23 | Mannesmann Sachs Ag | Friction clutch with automatic wear adjuster having a leaf spring |
| WO2004083677A1 (en) * | 2003-03-21 | 2004-09-30 | Daimlerchrysler Ag | Two-mass oscillating wheel with two serially mounted torsion dampers |
| EP1491792A1 (en) * | 2003-06-28 | 2004-12-29 | ZF Sachs AG | Vehicle driveline torque transmission system |
| EP1584830A1 (en) * | 2004-04-10 | 2005-10-12 | BorgWarner Inc. | Clutch device, in particular starting clutch |
-
2007
- 2007-07-11 FR FR0756424A patent/FR2918728B1/en not_active Expired - Fee Related
-
2008
- 2008-06-25 WO PCT/FR2008/051142 patent/WO2009007593A1/en not_active Ceased
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4323392A1 (en) * | 1992-08-05 | 1994-02-10 | Fichtel & Sachs Ag | Arrangement for attaching a clutch to a crankshaft |
| GB2296959A (en) * | 1993-03-26 | 1996-07-17 | Fichtel & Sachs Ag | Clutch assembly and crankshaft attachment means having torque transmitting dowels |
| GB2340559A (en) * | 1996-03-16 | 2000-02-23 | Mannesmann Sachs Ag | Friction clutch with automatic wear adjuster having a leaf spring |
| WO2004083677A1 (en) * | 2003-03-21 | 2004-09-30 | Daimlerchrysler Ag | Two-mass oscillating wheel with two serially mounted torsion dampers |
| EP1491792A1 (en) * | 2003-06-28 | 2004-12-29 | ZF Sachs AG | Vehicle driveline torque transmission system |
| EP1584830A1 (en) * | 2004-04-10 | 2005-10-12 | BorgWarner Inc. | Clutch device, in particular starting clutch |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2918728B1 (en) | 2010-01-15 |
| FR2918728A1 (en) | 2009-01-16 |
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