WO2008113954A2 - Electromechanical actuator for the gearbox of an automotive vehicle and clutch device with such actuator - Google Patents

Electromechanical actuator for the gearbox of an automotive vehicle and clutch device with such actuator Download PDF

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Publication number
WO2008113954A2
WO2008113954A2 PCT/FR2008/050309 FR2008050309W WO2008113954A2 WO 2008113954 A2 WO2008113954 A2 WO 2008113954A2 FR 2008050309 W FR2008050309 W FR 2008050309W WO 2008113954 A2 WO2008113954 A2 WO 2008113954A2
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WO
WIPO (PCT)
Prior art keywords
actuator
flange
actuator according
control shaft
kinematic chain
Prior art date
Application number
PCT/FR2008/050309
Other languages
French (fr)
Other versions
WO2008113954A3 (en
Inventor
Michel Raoul
Jean-Michel Teixeira
Original Assignee
Renault S.A.S.
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 Renault S.A.S. filed Critical Renault S.A.S.
Publication of WO2008113954A2 publication Critical patent/WO2008113954A2/en
Publication of WO2008113954A3 publication Critical patent/WO2008113954A3/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
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/26—Generation or transmission of movements for final actuating mechanisms
    • F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
    • F16H61/32—Electric motors actuators or related electrical control means therefor
    • 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
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H63/304—Constructional features of the final output mechanisms the final output mechanisms comprising elements moved by electrical or magnetic force
    • F16H2063/3063—Constructional features of the final output mechanisms the final output mechanisms comprising elements moved by electrical or magnetic force using screw devices
    • 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
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H63/304—Constructional features of the final output mechanisms the final output mechanisms comprising elements moved by electrical or magnetic force
    • F16H2063/3066—Constructional features of the final output mechanisms the final output mechanisms comprising elements moved by electrical or magnetic force using worm gears
    • 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
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H2063/3089—Spring assisted shift, e.g. springs for accumulating energy of shift movement and release it when clutch teeth are aligned

Definitions

  • Electromechanical actuator for a motor vehicle gearbox and clutch device provided with such an actuator
  • the invention relates generally to the field of motor vehicle gearboxes.
  • a particularly interesting application of the invention relates to robotized gearboxes in which the clutching and shifting maneuvers are performed by actuators controlled by an onboard computer on board the vehicle and, in particular, robotized gearboxes. with passages under torque.
  • EP-A-318335 describes an automated gearbox with torque passages provided with electromechanical actuators, one of which, in particular, is provided with an electromechanical actuator. actuation in the form of a finger for controlling the movement of control forks by means of respective jaw claws which provide for one, the passage of gear ratios and the other, the control of the input clutch. .
  • the actuator actuates a self-assisted conical coupler.
  • the conical coupler is open and its actuation consists in applying a permanent external force during the synchronization and during the transmission of the engine torque. Piloting is preferably carried out according to the force applied so that a certain progressivity of the rise in effort is necessary.
  • Another function of the actuator is to actuate the input clutch, conical type, as described in EP-A-318 319 or multi-type.
  • the clutch is closed, under the action of springs.
  • the actuator shall progressively exert a restraint which initially has a maximum value, when the clutch is open, and, at the end, to a zero value, when the clutch is closed.
  • the control must preferably be performed by controlling the position of the controlled elements. The actuator must then provide a force with a larger stroke.
  • the subject of the invention is therefore an electromechanical actuator for a motor vehicle gearbox comprising an actuating member intended to control the displacement of one or more internal organs of the gearbox.
  • the actuator further comprises a first kinematic chain and a second kinematic chain each adapted to implement the actuating member and selection means adapted to selectively cause the implementation of said actuating member by means of the actuator. one or the other kinematic chain.
  • the actuating member comprises an actuating finger and a control pin on which is mounted the actuating finger.
  • the actuator comprises meanwhile a first rotary flange and a second flange rotary members each adapted to rotate the control shaft, the second flange being driven by the first flange via an elastically deformable means.
  • control shaft is mounted axially displaceable between a first axial position and a second axial position in which it meshes with the first and second flanges, respectively.
  • the actuator comprises a first selection electric motor means controlling the axial displacement of the control shaft.
  • the first kinematic chain comprises a motor thread rotated by the second motor means, a first reduction stage, a second reduction stage driving the first flange, the elastically deformable means and the second bearing.
  • the second kinematic chain may, in turn, comprise the motor net, the first and second reduction stages and the first flange.
  • the invention also relates, in a second aspect, to a clutch device which comprises an electromechanical actuator as defined above.
  • FIG. 1 is a sectional view longitudinal of an electromechanical actuator according to the invention, in a first mode of use;
  • FIGS. 1 and 2 show an exemplary embodiment of an electromechanical actuator for a robotized gearbox of a motor vehicle with undercuts provided with a coupling device of the self-assisted conical coupler type and a clutch. entrance.
  • the actuator shown in these figures is thus intended to actuate a self-assisted conical coupler by means of an elastic means providing a progressiveness in the transmission of forces, in the position shown in FIG. in action the input clutch without internal progressiveness, in the position illustrated in Figure 2, the progressivity being, in this case, transferred to the clutch using for example a spring interposed within the clutch control or in the clutch itself.
  • the electromechanical actuator essentially comprises a housing 10 closed by a cover January 1 and on which is mounted a first selection motor 12 to select the operating mode of the actuator and a second control motor 13 providing, in a conventional manner, the moving a clutch control fork or a shift fork through respective jaw claws.
  • the actuation of the forks is effected by means of an actuating finger 14 whose angular displacement is caused by the second motor means either under the action of a first kinematic chain (FIG. 1) or under the action a second driveline ( Figure 2).
  • the actuating finger 14 is in fact mounted on a control shaft 15 mounted axially displaceable in the casing 10 between an axial high position, visible in FIG. 1, in which it is driven by one of the kinematic chains, and a second low axial position, illustrated in Figure 2, in which it is driven by the other kinematic chain.
  • the motor shaft 13 is equipped with a worm 16 provided externally with a thread 17 which drives a first reduction stage constituted by a wheel gear 18 with a general axis parallel to the control shaft 15, then a second reduction stage constituted by a second gear wheel
  • the second gearwheel 19 cooperates with a pinion 20 made in the form of a toothing made externally on a first flange 20 coaxial with the control shaft 15.
  • the first flange 20 has indeed a generally annular shape and is provided with an axial passage internally provided with grooves 21 which cooperate with complementary splines 22 formed in the control shaft 15, in its first axial position.
  • the actuator is also provided with a second flange 23, also of generally annular shape, coaxial with the control shaft 15.
  • This second flange 23 also comprises an axial passage for the passage of the shaft 15. It is internally provided internal teeth 24 which cooperate with corresponding grooves 25 formed in the control shaft 15, in the second axial position of the shaft 15.
  • the first and second flanges are also provided with a second flange 23, also of generally annular shape, coaxial with the control shaft 15.
  • This second flange 23 also comprises an axial passage for the passage of the shaft 15. It is internally provided internal teeth 24 which cooperate with corresponding grooves 25 formed in the control shaft 15, in the second axial position of the shaft 15.
  • the second flange 23 is rotated by the first flange 20 via the progressivity springs 27 so as to obtain a certain progressivity in the transmission of forces between the flanges.
  • the selection motor 12 is provided with a toothed wheel 28 which cooperates with a conical pinion 29 mounted on a screw-nut type drive system 30 made in the form a screw 30a on which is mounted the pinion 29 and a thread 30b formed in an axial bore formed in the control shaft 15. It is therefore conceivable that it is thus possible, by rotating the conical pinion 28, by means of the selection motor 12, to vary the axial position of the control pin 15 and consequently to choose the mode of rotation. operation of the actuator.
  • the displacement of the actuating finger 14 is carried out according to the following kinematic chain: second motor 13, worm 16, - first reduction stage, second reduction stage , first outlet flange 20, progressivity spring 27, second flange 23, - control shaft, actuating finger.
  • the first flange 20 can continue its rotation by compressing the springs 27.
  • the pressure springs increase, the torque transmitted to the axis 15 rises. This gives a progressivity in the force applied according to the relative angular position of the springs.
  • the displacement of the actuating finger 14 is carried out without progressivity of the springs, according to the following kinematic chain: motor, worm 16, first stage of reduction, - second reduction stage, first output flange 20, control shaft 15, actuating finger 14.
  • the transmission is then performed without progressivity. Indeed, when the actuating finger 14 encounters its end-of-travel obstacle, the first flange 20 and the motor 13 are blocked.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gear-Shifting Mechanisms (AREA)
  • Motor Power Transmission Devices (AREA)
  • Mechanical Operated Clutches (AREA)

Abstract

The invention relates to an electromechanical actuator for the gearbox of an automotive vehicle that comprises an actuation member (14) for controlling the movement of one or more internal members of the gearbox. It further includes a first cinematic chain and a second cinematic chain each adapted for implementing the actuation member and selection means (12) for selectively implementing said actuation member via one of said cinematic chains.

Description

Actionneur électromécanique pour boîte de vitesses de véhicule automobile et dispositif d'embrayage pourvu d'un tel actionneur Electromechanical actuator for a motor vehicle gearbox and clutch device provided with such an actuator
L'invention concerne, de manière générale, le domaine des boîtes de vitesses de véhicule automobile.The invention relates generally to the field of motor vehicle gearboxes.
Plus particulièrement, elle se rapporte à un actionneur électromécanique pour une telle boîte de vitesses.More particularly, it relates to an electromechanical actuator for such a gearbox.
Une application particulièrement intéressante de l' invention concerne les boîtes de vitesses robotisées dans lesquelles les manœuvres d' embrayage et de passage des vitesses sont réalisées par des actionneurs contrôlés par un calculateur embarqué à bord du véhicule et, en particulier, les boîtes de vitesses robotisées à passages sous couple.A particularly interesting application of the invention relates to robotized gearboxes in which the clutching and shifting maneuvers are performed by actuators controlled by an onboard computer on board the vehicle and, in particular, robotized gearboxes. with passages under torque.
On connaît déjà, dans l' état de la technique, des actionneurs électromécaniques pour boîtes de vitesses robotisées. On pourra ainsi, par exemple, se référer au document EP-A- I 318 335 qui décrit une boîte de vitesses automatisée à passages sous couple pourvue d' actionneurs électromécaniques dont l'un, en particulier, est pourvu d'un organe d' actionnement sous la forme d'un doigt destiné à commander le déplacement de fourchettes de commande par l' intermédiaire de crabots respectifs qui assurent l'une, le passage de rapports de vitesse et l' autre, la commande de l' embrayage d' entrée.Already known in the state of the art, electromechanical actuators for robotic gearboxes. For example, reference can be made to EP-A-318335, which describes an automated gearbox with torque passages provided with electromechanical actuators, one of which, in particular, is provided with an electromechanical actuator. actuation in the form of a finger for controlling the movement of control forks by means of respective jaw claws which provide for one, the passage of gear ratios and the other, the control of the input clutch. .
Dans ce type de boîte de vitesses, l' actionneur met en action un coupleur conique auto-assisté. Par défaut, le coupleur conique est ouvert et sa mise en action consiste à lui appliquer un effort extérieur permanent pendant la synchronisation et pendant la transmission du couple moteur. Le pilotage est, de préférence, réalisé en fonction de l' effort appliqué de sorte qu'une certaine progressivité de la montée en effort est nécessaire. Une autre fonction de l' actionneur consiste à mettre en action l' embrayage d' entrée, de type conique, comme décrit dans le document EP-A- I 318 319 ou de type multidiques. Par défaut, l'embrayage est fermé, sous l' action de ressorts. Lors de la fermeture progressive de l' embrayage, l' actionneur doit exercer progressivement une retenue qui, au départ, a une valeur maximale, lorsque l' embrayage est ouvert, et, à la fin, à une valeur nulle, lorsque l' embrayage est fermé. Dans ce cas, et contrairement au pilotage réalisé par un coupleur conique, le pilotage doit être préférentiellement réalisé en contrôlant la position des éléments pilotés . L' actionneur doit alors fournir un effort selon une course plus étendue.In this type of gearbox, the actuator actuates a self-assisted conical coupler. By default, the conical coupler is open and its actuation consists in applying a permanent external force during the synchronization and during the transmission of the engine torque. Piloting is preferably carried out according to the force applied so that a certain progressivity of the rise in effort is necessary. Another function of the actuator is to actuate the input clutch, conical type, as described in EP-A-318 319 or multi-type. By default, the clutch is closed, under the action of springs. At the gradual closure of the clutch, the actuator shall progressively exert a restraint which initially has a maximum value, when the clutch is open, and, at the end, to a zero value, when the clutch is closed. In this case, and contrary to the control performed by a conical coupler, the control must preferably be performed by controlling the position of the controlled elements. The actuator must then provide a force with a larger stroke.
Alors que lors de la mise en action d'un coupleur conique autoassisté, on prévoit un ressort intercalé dans la chaîne cinématique servant à appliquer l'effort sur le coupleur, pour obtenir une certaine progressivité dans la montée en effort, lors de la mise en action de l' embrayage d' entrée, la progressivité interne de l' actionneur est néfaste à ce type de pilotage. Au vu de ce qui précède, il existe un besoin pour disposer d'un actionneur électromécanique qui puisse actionner un organe interne d'une boîte de vitesses selon deux modes d' actionnement distincts, selon la fonction à réaliser par l' actionneur.While during actuation of a conical coupler selfassisted, there is provided a spring interposed in the kinematic chain for applying the force on the coupler, to obtain a certain progressiveness in the rise in effort, when setting action of the input clutch, the internal progressivity of the actuator is detrimental to this type of control. In view of the foregoing, there is a need for an electromechanical actuator that can actuate an internal member of a gearbox according to two different modes of actuation, depending on the function to be performed by the actuator.
L' invention a donc pour objet un actionneur électromécanique pour boîte de vitesses de véhicule automobile comprenant un organe d' actionnement destiné à commander le déplacement d'un ou de plusieurs organes internes de la boîte de vitesses .The subject of the invention is therefore an electromechanical actuator for a motor vehicle gearbox comprising an actuating member intended to control the displacement of one or more internal organs of the gearbox.
L' actionneur comprend en outre une première chaîne cinématique et une deuxième chaîne cinématique adaptées chacune pour mettre en œuvre l' organe d' actionnement et des moyens de sélection aptes à provoquer sélectivement la mise en œuvre dudit organe d' actionnement au moyen de l'une ou l' autre chaîne cinématique.The actuator further comprises a first kinematic chain and a second kinematic chain each adapted to implement the actuating member and selection means adapted to selectively cause the implementation of said actuating member by means of the actuator. one or the other kinematic chain.
Il est ainsi possible d' intercaler à l'une des chaînes cinématiques un ressort de progressivité de manière à disposer d'une certaine progressivité dans la montée en effort lorsque l' on doit mettre en action un coupleur conique.It is thus possible to insert in one of the kinematic chains a progressivity spring so as to have a certain progressivity in the rise in force when a conical coupler has to be activated.
Ainsi, selon une autre caractéristique de l'invention, l' organe d' actionnement comprend un doigt d' actionnement et un axe de commande sur lequel est monté le doigt d' actionnement. L' actionneur comprend quant à lui un premier flasque rotatif et un deuxième flasque rotatif adaptés chacun pour entraîner en rotation l' axe de commande, le deuxième flasque étant entraîné par le premier flasque par l' intermédiaire d'un moyen élastiquement déformable.Thus, according to another characteristic of the invention, the actuating member comprises an actuating finger and a control pin on which is mounted the actuating finger. The actuator comprises meanwhile a first rotary flange and a second flange rotary members each adapted to rotate the control shaft, the second flange being driven by the first flange via an elastically deformable means.
Selon encore une autre caractéristique de l' invention, l' axe de commande est monté axialement déplaçable entre une première position axiale et une deuxième position axiale dans lesquelles il engrène avec les premier et deuxième flasques, respectivement.According to yet another characteristic of the invention, the control shaft is mounted axially displaceable between a first axial position and a second axial position in which it meshes with the first and second flanges, respectively.
Par exemple, l' actionneur comprend un premier moyen moteur électrique de sélection commandant le déplacement axial de l' axe de commande.For example, the actuator comprises a first selection electric motor means controlling the axial displacement of the control shaft.
Il peut également comprendre un deuxième moyen moteur électrique de commande adapté pour provoquer la rotation de l' axe de commande par l' intermédiaire d' au moins l'une des première ou deuxième chaînes cinématiques . Dans un mode de réalisation, la première chaîne cinématique comprend un filet moteur entraîné en rotation par le deuxième moyen moteur, un premier étage de réduction, un deuxième étage de réduction entraînant le premier flasque, les moyens élastiquement déformables et le deuxième palier. La deuxième chaîne cinématique peut, quant à elle, comporter le filet moteur, les premier et deuxième étages de réduction et le premier flasque.It may also comprise a second electric control motor means adapted to cause the rotation of the control shaft via at least one of the first or second drivelines. In one embodiment, the first kinematic chain comprises a motor thread rotated by the second motor means, a first reduction stage, a second reduction stage driving the first flange, the elastically deformable means and the second bearing. The second kinematic chain may, in turn, comprise the motor net, the first and second reduction stages and the first flange.
L'invention a également pour objet, selon un deuxième aspect, un dispositif d'embrayage qui comprend un actionneur électromécanique tel que défini ci-dessus .The invention also relates, in a second aspect, to a clutch device which comprises an electromechanical actuator as defined above.
D' autres buts, caractéristiques et avantages de l' invention apparaîtront à la lecture de la description suivante, donnée uniquement à titre d' exemple non limitatif, et faite en référence aux dessins annexés sur lesquels : - la figure 1 est une vue en coupe longitudinale d'un actionneur électromécanique conforme à l' invention, dans un premier mode d'utilisation ; etOther objects, features and advantages of the invention will become apparent on reading the following description, given solely by way of nonlimiting example, and with reference to the accompanying drawings, in which: FIG. 1 is a sectional view longitudinal of an electromechanical actuator according to the invention, in a first mode of use; and
- la figure 2 montre l' actionneur de la figure 1 , dans un autre mode de fonctionnement. Sur les figures 1 et 2, on a représenté un exemple de réalisation d'un actionneur électromécanique pour boîte de vitesses robotisée de véhicule automobile à passages sous couple équipée d'un dispositif de couplage de type coupleur conique auto-assisté et d'un embrayage d' entrée.- Figure 2 shows the actuator of Figure 1, in another mode of operation. FIGS. 1 and 2 show an exemplary embodiment of an electromechanical actuator for a robotized gearbox of a motor vehicle with undercuts provided with a coupling device of the self-assisted conical coupler type and a clutch. entrance.
L' actionneur représenté sur ces figures est ainsi destiné à mettre en action un coupleur conique auto-assisté par l' intermédiaire d'un moyen élastique procurant une progressivité dans la transmission des efforts, dans la position représentée à la figure 1 , et à mettre en action l' embrayage d' entrée sans progressivité interne, dans la position illustrée à la figure 2, la progressivité étant, dans ce cas, transférée à l' embrayage en utilisant par exemple un ressort intercalé au sein de la commande d'embrayage ou dans l' embrayage lui-même.The actuator shown in these figures is thus intended to actuate a self-assisted conical coupler by means of an elastic means providing a progressiveness in the transmission of forces, in the position shown in FIG. in action the input clutch without internal progressiveness, in the position illustrated in Figure 2, the progressivity being, in this case, transferred to the clutch using for example a spring interposed within the clutch control or in the clutch itself.
L' actionneur électromécanique comporte essentiellement un carter 10 obturé par un couvercle 1 1 et sur lequel est monté un premier moteur de sélection 12 pour sélectionner le mode de fonctionnement de l' actionneur et un deuxième moteur 13 de commande assurant, de manière classique, le déplacement d'une fourchette de commande d' embrayage ou d'une fourchette de passages de rapport par l' intermédiaire de crabots respectifs .The electromechanical actuator essentially comprises a housing 10 closed by a cover January 1 and on which is mounted a first selection motor 12 to select the operating mode of the actuator and a second control motor 13 providing, in a conventional manner, the moving a clutch control fork or a shift fork through respective jaw claws.
L' actionnement des fourchettes s ' effectue au moyen d'un doigt d' actionnement 14 dont le déplacement angulaire est provoqué par le deuxième moyen moteur soit sous l' action d'une première chaîne cinématique (figure 1 ), soit sous l' action d'une deuxième chaîne cinématique (figure 2) .The actuation of the forks is effected by means of an actuating finger 14 whose angular displacement is caused by the second motor means either under the action of a first kinematic chain (FIG. 1) or under the action a second driveline (Figure 2).
Le doigt d' actionnement 14 est en effet monté sur un axe de commande 15 monté axialement déplaçable dans le carter 10 entre une position axiale haute, visible sur la figure 1 , dans laquelle il est entraîné par l'une des chaînes cinématiques, et une deuxième position axiale basse, illustrée à la figure 2, dans laquelle il est entraîné par l' autre chaîne cinématique.The actuating finger 14 is in fact mounted on a control shaft 15 mounted axially displaceable in the casing 10 between an axial high position, visible in FIG. 1, in which it is driven by one of the kinematic chains, and a second low axial position, illustrated in Figure 2, in which it is driven by the other kinematic chain.
En se référant tout d' abord à la figure 1 , l' arbre du moteur 13 est équipé d'une vis sans fin 16 pourvue extérieurement d'un filet 17 qui entraîne un premier étage de réduction constitué par une roue dentée 18 d' axe général parallèle à l' axe de commande 15, puis un deuxième étage de réduction constitué par une deuxième roue dentéeReferring first to Figure 1, the motor shaft 13 is equipped with a worm 16 provided externally with a thread 17 which drives a first reduction stage constituted by a wheel gear 18 with a general axis parallel to the control shaft 15, then a second reduction stage constituted by a second gear wheel
19 coaxiale à la première roue dentée 18 mais de diamètre inférieur.19 coaxial with the first gear 18 but smaller diameter.
Comme on le voit, la deuxième roue dentée 19 coopère avec un pignon 20 réalisé sous la forme d'une denture pratiquée extérieurement sur un premier flasque 20 coaxial à l' arbre de commande 15.As can be seen, the second gearwheel 19 cooperates with a pinion 20 made in the form of a toothing made externally on a first flange 20 coaxial with the control shaft 15.
Le premier flasque 20 comporte en effet une forme générale annulaire et est pourvu d'un passage axial muni intérieurement de cannelures 21 qui coopèrent avec des cannelures complémentaires 22 pratiquées dans l' axe de commande 15, dans sa première position axiale.The first flange 20 has indeed a generally annular shape and is provided with an axial passage internally provided with grooves 21 which cooperate with complementary splines 22 formed in the control shaft 15, in its first axial position.
L' actionneur est également pourvu d'un deuxième flasque 23 , également de forme globalement annulaire, coaxial à l' arbre de commande 15. Ce deuxième flasque 23 comporte également un passage axial pour le passage de l' arbre 15. Il est pourvu intérieurement de dentures internes 24 qui coopèrent avec des cannelures 25 correspondantes pratiquées dans l' arbre de commande 15, dans la deuxième position axiale de l' arbre 15. En outre, comme on le voit, les premier et deuxième flasquesThe actuator is also provided with a second flange 23, also of generally annular shape, coaxial with the control shaft 15. This second flange 23 also comprises an axial passage for the passage of the shaft 15. It is internally provided internal teeth 24 which cooperate with corresponding grooves 25 formed in the control shaft 15, in the second axial position of the shaft 15. In addition, as seen, the first and second flanges
20 et 23, comportent, au voisinage de leur périphérie, des empreintes complémentaires qui définissent des logements, tels que 26, dans lesquels sont placés des ressorts de progressivité 27.20 and 23, comprise, in the vicinity of their periphery, complementary impressions which define housings, such as 26, in which progressivity springs 27 are placed.
En d' autres termes, selon cet agencement, le deuxième flasque 23 est entraîné en rotation par le premier flasque 20 par l' intermédiaire des ressorts de progressivité 27 de manière à obtenir une certaine progressivité dans la transmission des efforts entre les flasques .In other words, according to this arrangement, the second flange 23 is rotated by the first flange 20 via the progressivity springs 27 so as to obtain a certain progressivity in the transmission of forces between the flanges.
Enfin, pour provoquer le déplacement axial de l' arbre 15, le moteur de sélection 12 est pourvu d'une roue 28 dentée qui coopère avec un pignon conique 29 monté sur un système d' entraînement de type vis-écrou 30 réalisé sous la forme d'une vis 30a sur laquelle est montée le pignon 29 et d'un filetage 30b pratiqué dans un alésage axiale ménagé dans l' arbre de commande 15. On conçoit dès lors qu' il est ainsi possible, par mise en rotation du pignon conique 28, au moyen du moteur de sélection 12, de faire varier la position axiale de l' axe de commande 15 et choisir, en conséquence, le mode de fonctionnement de l' actionneur. Ainsi, selon un premier mode de fonctionnement illustré à la figure 1 , le déplacement du doigt d' actionnement 14 s' effectue selon la chaîne cinématique suivante : deuxième moteur 13, vis sans fin 16, - premier étage de réduction, deuxième étage de réduction, premier flasque de sortie 20, ressort de progressivité 27, deuxième flasque 23, - axe de commande, doigt d' actionnement.Finally, to cause axial displacement of the shaft 15, the selection motor 12 is provided with a toothed wheel 28 which cooperates with a conical pinion 29 mounted on a screw-nut type drive system 30 made in the form a screw 30a on which is mounted the pinion 29 and a thread 30b formed in an axial bore formed in the control shaft 15. It is therefore conceivable that it is thus possible, by rotating the conical pinion 28, by means of the selection motor 12, to vary the axial position of the control pin 15 and consequently to choose the mode of rotation. operation of the actuator. Thus, according to a first operating mode illustrated in FIG. 1, the displacement of the actuating finger 14 is carried out according to the following kinematic chain: second motor 13, worm 16, - first reduction stage, second reduction stage , first outlet flange 20, progressivity spring 27, second flange 23, - control shaft, actuating finger.
Dans ce cas, lorsque le doigt d' actionnement rencontre son obstacle en fin de course, bloquant l' axe de commande 15 et le deuxième flasque 23 , le premier flasque 20 peut continuer sa rotation en comprimant les ressorts 27. A mesure que la pression des ressorts augmente, le couple transmis à l' axe 15 s ' élève. On obtient ainsi une progressivité dans l' effort appliqué selon la position angulaire relative des ressorts .In this case, when the actuating finger meets its obstacle at the end of the stroke, blocking the control pin 15 and the second flange 23, the first flange 20 can continue its rotation by compressing the springs 27. As the pressure springs increase, the torque transmitted to the axis 15 rises. This gives a progressivity in the force applied according to the relative angular position of the springs.
Selon un deuxième mode d'utilisation de l' actionneur, illustré à la figure 2, le déplacement du doigt d' actionnement 14 s' effectue sans progressivité des ressorts, selon la chaîne cinématique suivante : moteur, vis sans fin 16, premier étage de réduction, - deuxième étage de réduction, premier flasque de sortie 20, axe de commande 15, doigt d' actionnement 14. La transmission est alors réalisée sans progressivité. En effet, lorsque le doigt d' actionnement 14 rencontre son obstacle de fin de course, le premier flasque 20 ainsi que le moteur 13 sont bloqués . According to a second mode of use of the actuator, illustrated in FIG. 2, the displacement of the actuating finger 14 is carried out without progressivity of the springs, according to the following kinematic chain: motor, worm 16, first stage of reduction, - second reduction stage, first output flange 20, control shaft 15, actuating finger 14. The transmission is then performed without progressivity. Indeed, when the actuating finger 14 encounters its end-of-travel obstacle, the first flange 20 and the motor 13 are blocked.

Claims

REVENDICATIONS
1. Actionneur électromécanique pour boîte de vitesses automatique comprenant un organe d' actionnement ( 14) destiné à commander le déplacement d'un ou de plusieurs organes internes de la boîte de vitesses, caractérisé en ce qu' il comprend en outre une première chaîne cinématique et une deuxième chaîne cinématique adaptées chacune pour mettre en œuvre l' organe d' actionnement et des moyens de sélection ( 12) aptes à provoquer sélectivement la mise en œuvre dudit organe d' actionnement ( 14) au moyen de l'une ou l' autre chaîne cinématique.An electromechanical actuator for an automatic transmission comprising an actuating member (14) for controlling the displacement of one or more internal members of the gearbox, characterized in that it further comprises a first kinematic chain. and a second kinematic chain each adapted to implement the actuating member and selecting means (12) capable of selectively causing said actuator (14) to be operated by means of one or the other other kinematic chain.
2. Actionneur électromagnétique selon la revendication 1 , caractérisé en ce que l' organe d' actionnement comprend un doigt d' actionnement et un axe de commande ( 15) sur lequel est monté le doigt. 2. Electromagnetic actuator according to claim 1, characterized in that the actuating member comprises an actuating finger and a control shaft (15) on which is mounted the finger.
3. Actionneur selon la revendication 2, caractérisé en ce qu' il comprend un premier flasque rotatif (20) et un deuxième flasque rotatif (23) adaptés chacun pour entraîner en rotation l' axe de commande ( 15), le deuxième flasque (23) étant entraîné par le premier flasque (20) par l' intermédiaire d'un moyen élastiquement déformable (27) .3. Actuator according to claim 2, characterized in that it comprises a first rotary flange (20) and a second rotary flange (23) each adapted to drive in rotation the control shaft (15), the second flange (23). ) being driven by the first flange (20) via an elastically deformable means (27).
4. Actionneur selon la revendication 3, caractérisé en ce que l' axe de commande ( 15) est monté axialement déplaçable entre une première position axiale et une deuxième position axiale dans lesquelles il engrène avec lesdits flasques, respectivement. 4. An actuator according to claim 3, characterized in that the control shaft (15) is mounted axially displaceable between a first axial position and a second axial position in which it meshes with said flanges, respectively.
5. Actionneur selon la revendication 4, caractérisé en ce qu' il comprend un premier moyen moteur électrique de sélection ( 12) commandant le déplacement axial de l' axe de commande ( 15) .5. An actuator according to claim 4, characterized in that it comprises a first electric selection motor means (12) controlling the axial displacement of the control shaft (15).
6. Actionneur selon l'une quelconque des revendications 3 à 5, caractérisé en ce qu' il comprend un deuxième moyen moteur électrique ( 13) de commande adapté pour provoquer la rotation de l' axe de commande par l' intermédiaire d' au moins l'une des première et deuxième chaînes cinématiques . 6. Actuator according to any one of claims 3 to 5, characterized in that it comprises a second electric motor means (13) of control adapted to cause the rotation of the control shaft via at least one of the first and second drivelines.
7. Actionneur selon la revendication 6, caractérisé en ce que la première chaîne cinématique comprend un filet moteur ( 17) entraîné en rotation par le deuxième moyen moteur, un premier étage de réduction ( 18), un deuxième étage de réduction ( 19) entraînant le premier flasque (20), les moyens élastiquement déformables (27) et le deuxième flasque (23) .7. Actuator according to claim 6, characterized in that the first kinematic chain comprises a motor thread (17) driven in rotation by the second motor means, a first reduction stage (18), a second reduction stage (19) driving the first flange (20), the elastically deformable means (27) and the second flange (23).
8. Actionneur selon la revendication 7, caractérisé en ce que la deuxième chaîne cinématique comprend le filet ( 17) moteur, les premier et deuxième étages de réduction et le premier flasque (20) . 8. Actuator according to claim 7, characterized in that the second kinematic chain comprises the thread (17) motor, the first and second reduction stages and the first flange (20).
9. Dispositif d' embrayage, caractérisé en ce qu' il comprend un actionneur électromécanique selon l'une quelconque des revendications 1 à 7. 9. A clutch device, characterized in that it comprises an electromechanical actuator according to any one of claims 1 to 7.
PCT/FR2008/050309 2007-03-07 2008-02-25 Electromechanical actuator for the gearbox of an automotive vehicle and clutch device with such actuator WO2008113954A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0753695A FR2913475B1 (en) 2007-03-07 2007-03-07 ELECTROMECHANICAL ACTUATOR FOR A MOTOR VEHICLE GEARBOX AND CLUTCH DEVICE COMPRISING SUCH ACTUATOR.
FR0753695 2007-03-07

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WO2008113954A2 true WO2008113954A2 (en) 2008-09-25
WO2008113954A3 WO2008113954A3 (en) 2008-11-06

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2948161A1 (en) * 2009-07-16 2011-01-21 Renault Sa Method for controlling electromechanical actuator of automatic robotized gearbox of motor vehicle, involves coupling grooves of controlling axle with complementary grooves of transfer body in docking phase by oscillating movement of motor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2777834A1 (en) * 1998-04-28 1999-10-29 Valeo Electro-mechanical actuator for automatic mechanical gearbox fitted to motor vehicle
US6003649A (en) * 1996-04-03 1999-12-21 Luk Getreibe-Systeme Gmbh Method and apparatus for actuating a transmission
FR2785659A1 (en) * 1998-11-09 2000-05-12 Mannesmann Sachs Ag ACTUATOR, ESPECIALLY AN AUTOMATIC GEARBOX
EP1318335A1 (en) * 2001-12-07 2003-06-11 Renault s.a.s. Automated gearbox with powershifting

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6003649A (en) * 1996-04-03 1999-12-21 Luk Getreibe-Systeme Gmbh Method and apparatus for actuating a transmission
FR2777834A1 (en) * 1998-04-28 1999-10-29 Valeo Electro-mechanical actuator for automatic mechanical gearbox fitted to motor vehicle
FR2785659A1 (en) * 1998-11-09 2000-05-12 Mannesmann Sachs Ag ACTUATOR, ESPECIALLY AN AUTOMATIC GEARBOX
EP1318335A1 (en) * 2001-12-07 2003-06-11 Renault s.a.s. Automated gearbox with powershifting

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2948161A1 (en) * 2009-07-16 2011-01-21 Renault Sa Method for controlling electromechanical actuator of automatic robotized gearbox of motor vehicle, involves coupling grooves of controlling axle with complementary grooves of transfer body in docking phase by oscillating movement of motor

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FR2913475A1 (en) 2008-09-12
WO2008113954A3 (en) 2008-11-06
FR2913475B1 (en) 2009-08-28

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