EP1058786B1 - Motor vehicle starter with reduction gear comprising means forming torsional damper - Google Patents

Motor vehicle starter with reduction gear comprising means forming torsional damper Download PDF

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Publication number
EP1058786B1
EP1058786B1 EP99959501A EP99959501A EP1058786B1 EP 1058786 B1 EP1058786 B1 EP 1058786B1 EP 99959501 A EP99959501 A EP 99959501A EP 99959501 A EP99959501 A EP 99959501A EP 1058786 B1 EP1058786 B1 EP 1058786B1
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EP
European Patent Office
Prior art keywords
crown
starter according
toothed crown
casing
pads
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP99959501A
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German (de)
French (fr)
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EP1058786A1 (en
Inventor
José IZQUIERDO
Pascal Jacquin
Pierre Valot
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Equipements Electriques Moteur SAS
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Valeo Equipements Electriques Moteur SAS
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Publication of EP1058786A1 publication Critical patent/EP1058786A1/en
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Publication of EP1058786B1 publication Critical patent/EP1058786B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
    • F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
    • F02N15/04—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
    • F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
    • F02N15/04—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears
    • F02N15/043—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the gearing including a speed reducer
    • F02N15/046—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the gearing including a speed reducer of the planetary type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/13—Machine starters
    • Y10T74/131—Automatic
    • Y10T74/137—Reduction gearing

Definitions

  • the present invention relates to a vehicle starter automobile.
  • the invention relates more particularly to a starter motor vehicle of the type comprising a housing in which is arranged an electric motor whose output shaft drives in rotation a coaxial launcher with the interposition of a reducer with planetary gear comprising a crown of rigid material, internally toothed, which is housed at least partially in a housing cavity in which it is immobilized in rotation by means by cooperation of forms and which has an internally toothed cylindrical annular skirt and closed at its front axial end by a transverse wall of radial orientation pierced in its center for the passage of a gearbox output shaft.
  • the object of the invention is to propose a new design of a starter of the type mentioned above which remedies the disadvantages which have just been mentioned.
  • the invention proposes a starter, characterized in that the crown has studs molded in a flexible material, in particular an elastomeric material, which are interposed between the ring gear and portions complementary to the housing cavity to immobilize the toothed crown in rotation relative to the case and ensure a torsional damper function between these two elements.
  • FIG. 1 a starter 10 of motor vehicle of the type comprising an electric motor 12 whose rotor 14 is mounted to rotate, around an axis X-X to inside a rear part 16 of the starter housing which is completed by a front part 18 in the form of a hood.
  • the upper part of the starter 10 has a electromagnetic contactor 19 which, via a lever 20 in the form of a fork, acts in a known manner on a launcher 22 which is slidably mounted on a launcher shaft 24 coaxial with the output shaft 26 of the electric motor 12.
  • the planetary gear 34 also includes a crown 44 internally toothed inside which mesh the satellites 36 and which is immobilized in rotation relative to the starter housing 10.
  • the internal cylindrical surface of the skirt 46 is toothed and it has for this purpose a series of teeth 62 which extend over the entire axial length of the internal surface tooth 61, that is to say notably substantially to the bottom of the ring gear 44 formed by the transverse face internal 64 of the wall 50.
  • the toothed crown 44 consists essentially of a cylindrical annular skirt 46 which is open axially to its rear end 48 and whose front end is closed by a transverse wall of radial orientation 50 which is pierced in the center with a hole 52 in which, with interposition of a socket 54, is rotatably mounted the shaft of exit 42.
  • the internally toothed crown 34 is a part molded in rigid plastic which is overmolded on a metal plate 55 which extends in a transverse plane perpendicular to the X-X axis and which supports different components of starter 10 on which they are assembled by mounting screws 17 which are used in particular to fix together the rear 16 and front 18 parts of the housing of the starter and contactor 19.
  • the peripheral surface 56 of the skirt 46 of the crown 44 is a cylindrical surface and the ring gear 44 is received in a complementary hollow cylindrical cavity 58 formed in the cover 18 of the starter housing 10 and which is open axially rearward to allow insertion axial, from right to left considering Figure 1, of the ring gear 44 in the cavity 58.
  • the toothed crown 44 is a part molded in rigid or semi-rigid material, for example in material plastic or metal, this rigid body of the crown 44 constituting a core coated, in different zones, with parts molded from a flexible M2 material such as for example rubber or an elastomeric material.
  • the rigid material M1 constituting the body of the crown 44 of the planetary gear train 34 allows the transmission of forces in order to ensure the reduction of movement and the training in rotation of the starter shaft 24 by the output shaft 26 of the electric motor 12, while the molded parts in the flexible material M2 basically have functions torsional and vibration damper (s) between the train planetary 34 and the starter housing elements 10.
  • the cylindrical outer surface 63 of the skirt 46 of rigid material is coated with a peripheral layer C vibration isolation molded in flexible M2 material and which is interposed between the skirt 46 and complementary portions of cavity 58 so that the outer peripheral surface 56 of the skirt of the toothed crown 44 in contact with the element housing 18 or the outer surface of the peripheral layer C in flexible material M2.
  • the layer vibration isolation device C has a rib 66 axial orientation which is an angular indexing rib of the crown 44 in the cavity 58 of the housing in two parts 16, 18.
  • the ring gear 44 also includes pads P made by molding in flexible M2 material which provide a function torsional damper between the ring gear 44 and the box 16, 18 of the starter 10.
  • the pads P are six in number and are distributed angularly so regular around the X-X axis of the ring gear 44.
  • the studs P extend axially from back to front, i.e. right to left considering these figures, so that protrude axially beyond the mean transverse plane of the transverse wall 50, from the external transverse face 65 thereof, to be received each in an axial groove 68 formed in the housing or cavity 58 and which open out axially backwards to allow axial insertion studs P in the grooves 68.
  • each pad P is delimited by two opposite side faces 70 of generally axial orientation each of which cooperates with a facing surface portion 72 laterally delimiting a complementary axial groove 68.
  • the layer peripheral C and the pads P are produced simultaneously in a flexible molding operation M2 around the body or core of rigid material M1 of the ring gear 44.
  • the transverse wall 50 has a series of axial holes through 74 through each of which material extends flexible molding M2 of a damping pad P to constitute a foot 76 for securing the corresponding stud P on the crown toothed rigid material 44.
  • each pad P includes a lashing foot 76 but the invention is not limited to this arrangement.
  • the transverse wall 50 comprises, at the level of each stud P, a pair of link arms 78 each of which extends axially towards the rear from the outer face 65 of the wall 50 for extend inside the body of M2 material of a stud correspondent P.
  • the invention is not limited to the case where the elements in flexible M2 material are overmolded around the rigid body in material M1.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Retarders (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Gears, Cams (AREA)

Description

La présente invention concerne un démarreur de véhicule automobile.The present invention relates to a vehicle starter automobile.

L'invention concerne plus particulièrement un démarreur de véhicule automobile du type comportant un boítier dans lequel est agencé un moteur électrique dont l'arbre de sortie entraíne en rotation un lanceur coaxial avec interposition d'un réducteur à train épicycloïdal comportant une couronne en matériau rigide, dentée intérieurement, qui est logée au moins partiellement dans une cavité du boítier dans laquelle elle est immobilisée en rotation par des moyens par coopération de formes et qui comporte une jupe annulaire cylindrique dentée intérieurement et fermée à son extrémité axiale avant par une paroi transversale d'orientation radiale percée en son centre pour le passage d'un arbre de sortie du réducteur.The invention relates more particularly to a starter motor vehicle of the type comprising a housing in which is arranged an electric motor whose output shaft drives in rotation a coaxial launcher with the interposition of a reducer with planetary gear comprising a crown of rigid material, internally toothed, which is housed at least partially in a housing cavity in which it is immobilized in rotation by means by cooperation of forms and which has an internally toothed cylindrical annular skirt and closed at its front axial end by a transverse wall of radial orientation pierced in its center for the passage of a gearbox output shaft.

Les temps de compression du moteur thermique, pendant la phase d'entraínement, provoquent des variations de charge et des rattrapages de jeux angulaires dans les différents engrenages. Il en résulte des vibrations et des chocs nuisibles à la durée de vie du démarreur. Ce phénomène est accompagné d'une émission sonore suffisamment intense pour être perçue désagréablement par l'utilisateur.The compression times of the heat engine, during training phase, cause load variations and take-up of angular clearances in the different gears. This results in vibrations and shocks harmful to life starter life. This phenomenon is accompanied by a program loud enough to be unpleasantly perceived by the user.

Selon une conception connue, et tel que décrite par exemple dans le document FR 2,751,803, afin de réduire les fortes surcharges mécaniques transmises aux organes tournants du démarreur, qui résultent des brusques variations de vitesse(s) apparaissant durant la période de démarrage du fait des brusques ralentissements du moteur thermique qui peuvent survenir suite aux premières explosions trop en avance par rapport au passage. au point mort haut des pistons, il a été proposé d'associer à un réducteur à train épicycloïdal un ou plusieurs amortisseurs constitués de blocs de caoutchouc qui arrêtent en rotation la couronne dentée du train d'engrenages.According to a known design, and as described for example in document FR 2,751,803, in order to reduce the strong mechanical overloads transmitted to the rotating members of the starter, which result from sudden variations in speed (s) appearing during the start-up period due to sudden changes thermal engine slowdowns which may occur following at the first explosions too far ahead of the passage. at top dead center of the pistons, it has been proposed to associate with a planetary gearbox one or more shock absorbers made of rubber blocks which stop the rotation gear ring gear.

Cette solution est toutefois encombrante, fait appel à des composants supplémentaires et occasionne un coût supplémentaire important tout en compliquant les opérations d'assemblage des composants du réducteur et/ou du démarreur. This solution is however cumbersome, uses additional components and comes at a cost additional important while complicating operations assembling components of the reducer and / or starter.

L'invention a pour objet de proposer une nouvelle conception d'un démarreur du type mentionné précédemment qui remédie aux inconvénients qui viennent d'être évoqués.The object of the invention is to propose a new design of a starter of the type mentioned above which remedies the disadvantages which have just been mentioned.

Dans ce but, l'invention propose un démarreur, caractérisé en ce que la couronne comporte des plots moulés en un matériau souple, notamment en matériau élastomère, qui sont interposés entre la couronne dentée et des portions complémentaires de la cavité du boítier pour immobiliser la couronne dentée en rotation par rapport au boítier et assurer une fonction d'amortisseur de torsion entre ces deux éléments.To this end, the invention proposes a starter, characterized in that the crown has studs molded in a flexible material, in particular an elastomeric material, which are interposed between the ring gear and portions complementary to the housing cavity to immobilize the toothed crown in rotation relative to the case and ensure a torsional damper function between these two elements.

Selon d'autres caractéristiques de l'invention :

  • la surface extérieure cylindrique de la jupe de la couronne dentée est munie d'une couche périphérique d'isolation vibratoire qui est moulée dans ledit matériau souple et qui est interposée entre la jupe et les portions complémentaires de la cavité formant logement pour la jupe de la couronne dentée ;
  • les plots amortisseurs et la couche périphérique d'isolation vibratoire sont réalisées par surmoulage sur la couronne dentée ;
  • la couronne en matériau rigide d'une part, et les plots amortisseurs et la couche périphérique d'isolation en matériau souple d'autre part, sont réalisées simultanément selon une technique de moulage bi-matières rigide et souple respectivement ;
  • les plots amortisseurs s'étendent axialement vers l'avant à partir de la face externe de la paroi transversale de la couronne dentée et coopèrent par leurs faces latérales opposées d'orientation axiale avec des portions de surfaces en vis-à-vis dont chaque paire délimite latéralement une rainure axiale complémentaire formée dans la cavité du boítier ;
  • la couronne dentée comporte une série de bras de liaison qui s'étendent axialement, à partir de la face externe de sa paroi transversale, à l'intérieur des plots amortisseurs ;
  • la paroi transversale de la couronne dentée comporte une série de trous axiaux débouchants à travers chacun desquels s'étend du matériau souple de moulage d'un plot amortisseur pour constituer un pied d'arrimage du plot correspondant sur la couronne dentée ;
  • les plots amortisseurs sont répartis angulairement de manière régulière autour de l'axe de la couronne dentée ;
  • le perçage central de la couronne délimite un palier pour le guidage en rotation de l'arbre de sortie du réducteur, et la surface interne du palier est munie d'une couche d'isolation vibratoire qui est moulée dans ledit matériau souple et qui est interposée entre la surface interne du palier et un coussinet de guidage en rotation de l'arbre de sortie ;
  • la couche périphérique d'isolation comporte une nervure d'indexation angulaire de la couronne dans la cavité du boítier.
According to other characteristics of the invention:
  • the cylindrical outer surface of the skirt of the toothed ring is provided with a peripheral layer of vibration isolation which is molded in said flexible material and which is interposed between the skirt and the complementary portions of the cavity forming a housing for the skirt of the toothed crown;
  • the shock absorbing pads and the peripheral vibration isolation layer are produced by overmolding on the ring gear;
  • the crown of rigid material on the one hand, and the damping pads and the peripheral insulation layer of flexible material on the other hand, are produced simultaneously according to a rigid and flexible bi-material molding technique respectively;
  • the damping pads extend axially forwards from the external face of the transverse wall of the ring gear and cooperate by their opposite lateral faces of axial orientation with portions of facing surfaces, each pair of which laterally delimits a complementary axial groove formed in the cavity of the housing;
  • the ring gear comprises a series of link arms which extend axially, from the external face of its transverse wall, inside the damping pads;
  • the transverse wall of the ring gear has a series of axial through holes through each of which extends flexible material for molding a damping pad to constitute a foot for securing the corresponding pad on the ring gear;
  • the damping pads are distributed angularly in a regular manner around the axis of the ring gear;
  • the central bore of the crown delimits a bearing for the guiding in rotation of the output shaft of the reduction gear, and the internal surface of the bearing is provided with a layer of vibration isolation which is molded in said flexible material and which is interposed between the internal surface of the bearing and a bearing guide in rotation of the output shaft;
  • the peripheral insulation layer comprises an angular indexing rib of the crown in the housing cavity.

D'autres caractéristiques et avantages de l'invention apparaítront à la lecture de la description détaillée qui suit pour la compréhension de laquelle on se reportera aux dessins annexés dans lesquels :

  • la figure 1 est une vue en section axiale partielle d'un exemple de réalisation d'un démarreur du type à réducteur à train épicycloïdal selon l'état de la technique ;
  • la figure 2 est une vue à plus grande échelle d'une partie d'un démarreur à réducteur à train épicycloidal réalisé conformément aux enseignements de l'invention ;
  • la figure 3 est une vue, en section selon la ligne 3-3 de la figure 4, qui illustre la couronne dentée intérieurement du train épicycloïdal de la figure 2 ;
  • la figure 4 est une vue axiale en bout selon la flèche F4 de la figure 3 ; et
  • la figure 5 est une vue de détail en section selon la ligne 5-5 de la figure 3.
Other characteristics and advantages of the invention will appear on reading the detailed description which follows for the understanding of which reference will be made to the appended drawings in which:
  • Figure 1 is a partial axial sectional view of an exemplary embodiment of a starter of the planetary gearbox type according to the prior art;
  • Figure 2 is an enlarged view of a portion of a planetary gear reducer starter made in accordance with the teachings of the invention;
  • Figure 3 is a view, in section along line 3-3 of Figure 4, which illustrates the internally toothed ring of the planetary train of Figure 2;
  • Figure 4 is an axial end view along arrow F4 of Figure 3; and
  • FIG. 5 is a detail view in section along line 5-5 of FIG. 3.

On a représenté sur la figure 1 un démarreur 10 de véhicule automobile du type comportant un moteur électrique 12 dont le rotor 14 est monté tournant, autour d'un axe X-X à l'intérieur d'une partie arrière 16 du boítier du démarreur qui est complétée par une partie avant 18 en forme de capot.There is shown in Figure 1 a starter 10 of motor vehicle of the type comprising an electric motor 12 whose rotor 14 is mounted to rotate, around an axis X-X to inside a rear part 16 of the starter housing which is completed by a front part 18 in the form of a hood.

La partie supérieure du démarreur 10 comporte un contacteur électromagnétique 19 qui, par l'intermédiaire d'un levier 20 en forme de fourche, agit de manière connue sur un lanceur 22 qui est monté coulissant sur un arbre de lanceur 24 coaxial à l'arbre de sortie 26 du moteur électrique 12. The upper part of the starter 10 has a electromagnetic contactor 19 which, via a lever 20 in the form of a fork, acts in a known manner on a launcher 22 which is slidably mounted on a launcher shaft 24 coaxial with the output shaft 26 of the electric motor 12.

L'arbre de sortie 26 du moteur électrique 12, lié en rotation au rotor 14, fait saillie axialement vers l'avant au-delà de la face avant 28 du stator 30 et il entraíne en rotation un pignon 32 qui est le pignon solaire d'un train épicycloïdal 34 qui constitue un réducteur à engrenages interposé entre l'arbre de sortie 26 et l'arbre de lanceur 24.The output shaft 26 of the electric motor 12, linked at rotation to rotor 14, protrudes axially forward beyond of the front face 28 of the stator 30 and it rotates a pinion 32 which is the sun pinion of a planetary gear train 34 which constitutes a gear reducer interposed between the output shaft 26 and the launcher shaft 24.

Le pignon solaire 32 coopère avec les pignons satellites 36 du train épicycloïdal 34 qui sont montés à rotation autour d'axes 38 qui sont portés par un plateau transversal d'orientation radiale 40 porte-satellites qui est lié en rotation à l'arbre de sortie 42 du réducteur 34 qui est lié en rotation à l'extrémité arrière (non représentée) de l'arbre de lanceur 24 pour l'entraínement en rotation de ce dernier par l'arbre de sortie 42.The sun gear 32 cooperates with the planet gears 36 of the planetary gear 34 which are rotatably mounted around axes 38 which are carried by a transverse plate radial orientation 40 planet carrier which is linked in rotation at the output shaft 42 of the reduction gear 34 which is linked in rotation at the rear end (not shown) of the shaft launcher 24 for the rotational drive of the latter by the output shaft 42.

Le train épicycloidal 34 comporte aussi une couronne 44 dentée intérieurement à l'intérieur de laquelle engrènent les satellites 36 et qui est immobilisée en rotation par rapport au boítier du démarreur 10.The planetary gear 34 also includes a crown 44 internally toothed inside which mesh the satellites 36 and which is immobilized in rotation relative to the starter housing 10.

La surface cylindrique interne de la jupe 46 est dentée et elle comporte à cet effet une série de dents 62 qui s'étendent sur toute la longueur axiale de la surface interne dentée 61, c'est-à-dire notamment sensiblement jusqu'au fond de la couronne dentée 44 constituée par la face transversale interne 64 de la paroi 50.The internal cylindrical surface of the skirt 46 is toothed and it has for this purpose a series of teeth 62 which extend over the entire axial length of the internal surface tooth 61, that is to say notably substantially to the bottom of the ring gear 44 formed by the transverse face internal 64 of the wall 50.

La couronne dentée 44 est constituée pour l'essentiel par une jupe annulaire cylindrique 46 qui est ouverte axialement à son extrémité arrière 48 et dont l'extrémité avant est fermée par une paroi transversale d'orientation radiale 50 qui est percée en son centre d'un trou 52 dans lequel, avec interposition d'une douille 54, est monté à rotation l'arbre de sortie 42.The toothed crown 44 consists essentially of a cylindrical annular skirt 46 which is open axially to its rear end 48 and whose front end is closed by a transverse wall of radial orientation 50 which is pierced in the center with a hole 52 in which, with interposition of a socket 54, is rotatably mounted the shaft of exit 42.

Dans cet exemple de réalisation selon l'état de la technique, la couronne dentée intérieurement 34 est une pièce moulée en matière plastique rigide qui est surmoulée sur une plaque métallique 55 qui s'étend dans un plan transversal perpendiculaire à l'axe X-X et qui sert de support à différents composants du démarreur 10 sur laquelle ils sont assemblés par des vis de montage 17 qui interviennent notamment pour fixer ensemble les parties arrière 16 et avant 18 du boítier du démarreur ainsi que le contacteur 19.In this embodiment according to the state of the technical, the internally toothed crown 34 is a part molded in rigid plastic which is overmolded on a metal plate 55 which extends in a transverse plane perpendicular to the X-X axis and which supports different components of starter 10 on which they are assembled by mounting screws 17 which are used in particular to fix together the rear 16 and front 18 parts of the housing of the starter and contactor 19.

On décrira maintenant en détail le mode de réalisation illustré aux figures 2 à 5.The embodiment will now be described in detail. illustrated in Figures 2 to 5.

Dans cet exemple de réalisation, il n'y a pas de plaque intermédiaire transversale pour la fixation des différents composants et les deux parties de boítier 16 et 18 sont serrées axialement directement par des vis 17.In this exemplary embodiment, there is no plate transverse intermediate for fixing the different components and the two housing parts 16 and 18 are tightened axially directly by screws 17.

La surface périphérique 56 de la jupe 46 de la couronne 44 est une surface cylindrique et la couronne dentée 44 est reçue dans une cavité cylindrique creuse complémentaire 58 formée dans le capot 18 du boítier du démarreur 10 et qui est ouverte axialement vers l'arrière pour permettre l'introduction axiale, de la droite vers la gauche en considérant la figure 1, de la couronne dentée 44 dans la cavité 58.The peripheral surface 56 of the skirt 46 of the crown 44 is a cylindrical surface and the ring gear 44 is received in a complementary hollow cylindrical cavity 58 formed in the cover 18 of the starter housing 10 and which is open axially rearward to allow insertion axial, from right to left considering Figure 1, of the ring gear 44 in the cavity 58.

Plus précisément, la couronne dentée 44 est une pièce moulée en matériau rigide ou semi-rigide, par exemple en matière plastique ou en métal, ce corps rigide de la couronne 44 constituant un noyau revêtu, dans différentes zones, de parties moulées en un matériau souple M2 tel que par exemple du caoutchouc ou un matériau élastomère.More specifically, the toothed crown 44 is a part molded in rigid or semi-rigid material, for example in material plastic or metal, this rigid body of the crown 44 constituting a core coated, in different zones, with parts molded from a flexible M2 material such as for example rubber or an elastomeric material.

Le matériau rigide M1 constitutif du corps de la couronne 44 du train épicycloidal 34 permet la transmission des efforts afin d'assurer la réduction de mouvement et l'entraínement en rotation de l'arbre du lanceur 24 par l'arbre 26 de sortie du moteur électrique 12, tandis que les parties moulées dans le matériau souple M2 ont essentiellement des fonctions d'amortisseur(s) de torsion et de vibration entre le train épicycloïdal 34 et les éléments de boítier du démarreur 10.The rigid material M1 constituting the body of the crown 44 of the planetary gear train 34 allows the transmission of forces in order to ensure the reduction of movement and the training in rotation of the starter shaft 24 by the output shaft 26 of the electric motor 12, while the molded parts in the flexible material M2 basically have functions torsional and vibration damper (s) between the train planetary 34 and the starter housing elements 10.

Ainsi, la surface extérieure cylindrique 63 de la jupe 46 en matériau rigide est revêtue d'une couche périphérique C d'isolation vibratoire moulée dans le matériau souple M2 et qui est interposée entre la jupe 46 et des portions complémentaires de la cavité 58 de manière que la surface périphérique externe 56 de la jupe de la couronne dentée 44 en contact avec l'élément de boítier 18 soit la surface externe de la couche périphérique C en matériau souple M2. Thus, the cylindrical outer surface 63 of the skirt 46 of rigid material is coated with a peripheral layer C vibration isolation molded in flexible M2 material and which is interposed between the skirt 46 and complementary portions of cavity 58 so that the outer peripheral surface 56 of the skirt of the toothed crown 44 in contact with the element housing 18 or the outer surface of the peripheral layer C in flexible material M2.

Comme on peut le voir sur les figures, la couche périphérique d'isolation vibratoire C comporte une nervure 66 d'orientation axiale qui est une nervure d'indexation angulaire de la couronne 44 dans la cavité 58 du boítier en deux parties 16, 18.As can be seen in the figures, the layer vibration isolation device C has a rib 66 axial orientation which is an angular indexing rib of the crown 44 in the cavity 58 of the housing in two parts 16, 18.

La couronne dentée 44 comporte aussi des plots P réalisés par moulage en matériau souple M2 qui assurent une fonction d'amortisseur de torsion entre la couronne dentée 44 et le boítier 16, 18 du démarreur 10.The ring gear 44 also includes pads P made by molding in flexible M2 material which provide a function torsional damper between the ring gear 44 and the box 16, 18 of the starter 10.

Dans l'exemple illustré sur les figures, les plots P sont au nombre de six et sont répartis angulairement de manière régulière autour de l'axe X-X de la couronne dentée 44.In the example illustrated in the figures, the pads P are six in number and are distributed angularly so regular around the X-X axis of the ring gear 44.

Comme on peut le voir aux figures 2 à 4, cinq des plots P sont identiques tandis que le sixième plot, c'est-à-dire le plot supérieur en considérant les figures qui est adjacent à la nervure d'indexation angulaire 66, présente une longueur axiale réduite vers l'avant, notamment pour faciliter l'agencement du levier 20.As can be seen in Figures 2 to 4, five of the pads P are identical while the sixth stud, i.e. the stud upper considering the figures which is adjacent to the angular indexing rib 66, has an axial length reduced towards the front, in particular to facilitate the arrangement of the lever 20.

Comme on le voit aux figures 2 et 3, les plots P s'étendent axialement d'arrière en avant, c'est-à-dire de la droite vers la gauche en considérant ces figures, de manière à faire saillie axialement au-delà du plan transversal moyen de la paroi transversale 50, à partir de la face transversale externe 65 de celle-ci, pour être reçus chacun dans une rainure axiale 68 formée dans le logement ou cavité 58 et qui débouchent axialement vers l'arrière pour permettre l'introduction axiale des plots P dans les rainures 68.As seen in Figures 2 and 3, the studs P extend axially from back to front, i.e. right to left considering these figures, so that protrude axially beyond the mean transverse plane of the transverse wall 50, from the external transverse face 65 thereof, to be received each in an axial groove 68 formed in the housing or cavity 58 and which open out axially backwards to allow axial insertion studs P in the grooves 68.

Plus précisément, chaque plot P est délimité par deux faces latérales opposées 70 d'orientation globalement axiale dont chacune coopère avec une portion de surface en vis-à-vis 72 délimitant latéralement une rainure axiale 68 complémentaire.More precisely, each pad P is delimited by two opposite side faces 70 of generally axial orientation each of which cooperates with a facing surface portion 72 laterally delimiting a complementary axial groove 68.

Dans l'exemple illustré sur les figures, la couche périphérique C et les plots P sont réalisés simultanément en une opération de surmoulage de matériau souple M2 autour du corps ou noyau en matériau rigide M1 de la couronne dentée 44.In the example illustrated in the figures, the layer peripheral C and the pads P are produced simultaneously in a flexible molding operation M2 around the body or core of rigid material M1 of the ring gear 44.

Pour obtenir un bon accrochage des plots surmoulés P, la paroi transversale 50 comporte une série de trous axiaux débouchants 74 à travers chacun desquels s'étend du matériau souple de moulage M2 d'un plot amortisseur P pour constituer un pied 76 d'arrimage du plot correspondant P sur la couronne dentée en matériau rigide 44.To obtain good attachment of the overmolded studs P, the transverse wall 50 has a series of axial holes through 74 through each of which material extends flexible molding M2 of a damping pad P to constitute a foot 76 for securing the corresponding stud P on the crown toothed rigid material 44.

Dans l'exemple illustré sur les figures, chaque plot P comporte un pied d'arrimage 76 mais l'invention n'est pas limitée à cet agencement.In the example illustrated in the figures, each pad P includes a lashing foot 76 but the invention is not limited to this arrangement.

Dans la mesure où les plots P assurent une fonction d'immobilisation en rotation de la couronne 44 par rapport au boítier 16, 18 ainsi qu'une fonction d'amortisseur en torsion entre la couronne 44 et le boítier 18, il est nécessaire d'assurer une bonne liaison tangentielle en rotation entre les plots P et le corps rigide de la couronne 44.Insofar as the P pads provide a function immobilizing the crown 44 in rotation relative to the box 16, 18 as well as a torsional damper function between the crown 44 and the case 18, it is necessary ensure a good tangential connection in rotation between the studs P and the rigid body of the crown 44.

A cet effet, comme on peut le voir à la figure 5, la paroi transversale 50 comporte, au droit de chaque plot P, une paire de bras de liaison 78 dont chacun s'étend axialement vers l'arrière à partir de la face externe 65 de la paroi 50 pour s'étendre à l'intérieur du corps en matériau M2 d'un plot correspondant P.For this purpose, as can be seen in Figure 5, the transverse wall 50 comprises, at the level of each stud P, a pair of link arms 78 each of which extends axially towards the rear from the outer face 65 of the wall 50 for extend inside the body of M2 material of a stud correspondent P.

Selon une variante de réalisation non représentée sur les figures, et toujours afin de limiter la transmission des bruits nuisibles, il est possible de munir la surface interne du perçage 52 du corps en matériau rigide M1 de la couronne dentée 44 avec une couche périphérique interne en matériau souple M2.According to an alternative embodiment not shown on the figures, and always in order to limit the transmission of noise it is possible to equip the internal surface of the drilling 52 of the body of rigid material M1 of the ring gear 44 with an internal peripheral layer of flexible material M2.

L'invention n'est pas limitée au cas où les éléments en matériau souple M2 sont surmoulés autour du corps rigide en matériau M1.The invention is not limited to the case where the elements in flexible M2 material are overmolded around the rigid body in material M1.

Il est aussi possible de réaliser la couronne 44 en matériau rigide M1 d'une part et les éléments moulés en matériau souple M2 d'autre part simultanément selon une technique de moulage bi-matières.It is also possible to make the crown 44 by rigid material M1 on the one hand and the molded elements of material flexible M2 on the other hand simultaneously using a bi-material molding.

Claims (10)

  1. A motor vehicle starter (10) comprising a casing (18) in which there is arranged an electric motor (12) having an output shaft (26) which drives in rotation a coaxial actuating head (22), with a speed reducing epicyclic gear train (34) interposed, the gear train comprising a crown (44) of rigid material (M1), having internal teeth (62), which is mounted at least partially within a cavity (58) of the casing and which includes an annular cylindrical skirt portion (46) having internal teeth and closed at its front axial end by a radially oriented transverse wall (50) pierced at its centre (52) for passage of an output shaft (42) of the speed reducing gear train, the said crown (44) including pads (P) moulded in a flexible material (M2), in particular an elastomeric material, whereby to provide a torsion damping function, characterised in that the said pads (P) are interposed between the toothed crown (44) and complementary portions (68) of the cavity (58) of the casing (16, 18), so as to immobilise the toothed crown (44) against rotation with respect to the casing (18) and to provide a torsion damping function between the two said elements (44, 18).
  2. A starter according to the preceding Claim, characterised in that the cylindrical outer surface (63) of the skirt portion (46) of the toothed crown (44) is provided with a vibration isolating peripheral layer (C) which is moulded in the said flexible material (M2) and which is interposed between the skirt portion (46) and the complementary portions of the cavity defining a housing (58) for the skirt portion of the toothed crown.
  3. A starter according to the preceding Claim, characterised in that the damping pads (P) and the vibration isolating peripheral layer (C) are formed by moulding in situ on the toothed crown (44).
  4. A starter according to Claim 2, characterised in that the crown of rigid material (M1) on the one hand, and the damping pads (P) and isolating peripheral layer (C) of flexible material on the other hand, are formed simultaneously, by a technique of moulding in two materials, namely the rigid material (M1) and the flexible material (M2) respectively.
  5. A starter according to the preceding Claim, characterised in that the damping pads (P) extend axially forwards from the outer face (65) of the transverse wall (50) of the toothed crown (44), and cooperate, through their opposed axially oriented, opposed lateral faces (40), with surface portions (72) in facing relationship with each other, each pair of which delimits laterally a complementary axial groove (68) formed in the cavity (58) of the casing (18).
  6. A starter according to the preceding Claim, characterised in that the toothed crown (44) includes a set of connecting arms (76) which extend axially from the outer face (65) of its transverse wall (50) into the interior of the damping pads (P).
  7. A starter according to Claim 5, characterised in that the transverse wall (50) of the toothed crown has a set of axial through holes (74), through each of which there extends flexible moulding material (M2) of a damping pad (P), whereby to constitute a foot (76) for anchoring the corresponding pad (P) on the toothed crown (44).
  8. A starter according to the preceding Claim, characterised in that the damping pads (P) are spaced apart circumferentially at regular intervals about the axis (X-X) of the toothed crown (44).
  9. A starter according to the preceding Claim, characterised in that the central hole (52) of the crown defines a bearing for guiding rotation of the output shaft (42) of the speed reducing gear train (34), and in that the inner surface (52) of the bearing is provided with a vibration isolating layer which is moulded in the said flexible material (M2) and which is interposed between the internal surface of the bearing and a cushion element (54) for guiding the output shaft in rotation.
  10. A starter according to Claim 2, characterised in that the isolating peripheral layer (C) includes a rib (66) for angular indexation of the crown (44) in the cavity (58) of the casing (16, 18).
EP99959501A 1998-12-23 1999-12-20 Motor vehicle starter with reduction gear comprising means forming torsional damper Expired - Lifetime EP1058786B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9816310 1998-12-23
FR9816310A FR2787833B1 (en) 1998-12-23 1998-12-23 STARTER OF A MOTOR VEHICLE WITH GEAR REDUCER COMPRISING TORSION SHOCK ABSORBER MEANS
PCT/FR1999/003209 WO2000039454A1 (en) 1998-12-23 1999-12-20 Motor vehicle starter with reduction gear comprising means forming torsional damper

Publications (2)

Publication Number Publication Date
EP1058786A1 EP1058786A1 (en) 2000-12-13
EP1058786B1 true EP1058786B1 (en) 2004-08-04

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EP99959501A Expired - Lifetime EP1058786B1 (en) 1998-12-23 1999-12-20 Motor vehicle starter with reduction gear comprising means forming torsional damper

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US (1) US6490940B1 (en)
EP (1) EP1058786B1 (en)
KR (1) KR100671579B1 (en)
CN (1) CN1205408C (en)
BR (1) BR9908154A (en)
DE (1) DE69919135T2 (en)
FR (1) FR2787833B1 (en)
WO (1) WO2000039454A1 (en)

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FR2981412B1 (en) * 2011-10-14 2017-04-14 Valeo Equip Electr Moteur STARTER HEAD AND STARTER EQUIPPED WITH SUCH HEAD
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DE102012211006B4 (en) * 2012-06-27 2021-03-18 Seg Automotive Germany Gmbh Cranking device for cranking an internal combustion engine and method for this
FR2997732A1 (en) 2012-11-08 2014-05-09 Valeo Equip Electr Moteur THERMAL MOTOR STARTER PROVIDED WITH SHEAR ABSORPTION DEVICE
FR3003412B1 (en) 2013-03-14 2016-12-09 Valeo Equip Electr Moteur ELECTRIC MACHINE ROTOR PROVIDED WITH AT LEAST ONE WELDING CHUNK HOLDING FREIGHT AND CORRESPONDING ELECTRIC MACHINE
FR3004496B1 (en) 2013-04-15 2017-08-11 Valeo Equip Electr Moteur CROWN WITH INSERT FOR SPEED REDUCER OF A THERMAL MOTOR STARTER AND CORRESPONDING SPEED REDUCER ASSEMBLY.
FR3013396A1 (en) 2013-11-21 2015-05-22 Valeo Equip Electr Moteur STARTER MOTOR THERMAL MOTOR STARTER LAUNCHER AND STARTER COMPRISING SUCH LAUNCHER
JP2015165114A (en) * 2014-03-03 2015-09-17 株式会社デンソー starter
FR3024608B1 (en) 2014-07-31 2018-03-02 Valeo Equipements Electriques Moteur INDUCTOR OF ROTATING ELECTRICAL MACHINE WITH IMPROVED MAGNETIC PERFORMANCE
FR3029364B1 (en) 2014-11-27 2017-08-25 Valeo Equip Electr Moteur STARTER ROTOR FOR MOTOR VEHICLE WITH PROTECTIVE LAYER ON THE HEEL
WO2017055731A1 (en) 2015-09-28 2017-04-06 Valeo Equipements Electriques Moteur Corrosion-resistant starter rotor for a motor vehicle
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FR3049985B1 (en) * 2016-04-08 2019-10-04 Valeo Equipements Electriques Moteur MOTOR VEHICLE THERMAL MOTOR STARTER PROVIDED WITH A BASE PLATE COMPRISING A SIPPER
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Also Published As

Publication number Publication date
WO2000039454A1 (en) 2000-07-06
US6490940B1 (en) 2002-12-10
CN1205408C (en) 2005-06-08
KR100671579B1 (en) 2007-01-18
KR20010041146A (en) 2001-05-15
DE69919135D1 (en) 2004-09-09
FR2787833B1 (en) 2001-03-02
CN1291259A (en) 2001-04-11
FR2787833A1 (en) 2000-06-30
DE69919135T2 (en) 2005-01-20
EP1058786A1 (en) 2000-12-13
BR9908154A (en) 2000-10-31

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