EP2957761B1 - Starter drive and associated starter - Google Patents

Starter drive and associated starter Download PDF

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Publication number
EP2957761B1
EP2957761B1 EP15172950.6A EP15172950A EP2957761B1 EP 2957761 B1 EP2957761 B1 EP 2957761B1 EP 15172950 A EP15172950 A EP 15172950A EP 2957761 B1 EP2957761 B1 EP 2957761B1
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EP
European Patent Office
Prior art keywords
pinion
drive
protective sleeve
bushing
sleeve
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.)
Active
Application number
EP15172950.6A
Other languages
German (de)
French (fr)
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EP2957761A1 (en
Inventor
Jean-François OEUVRARD
Tristan GUESNEY
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 EP2957761A1 publication Critical patent/EP2957761A1/en
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Publication of EP2957761B1 publication Critical patent/EP2957761B1/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
    • F02N15/06—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement
    • F02N15/067—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement the starter comprising an electro-magnetically actuated lever
    • 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
    • F02N15/06—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement
    • F02N15/062—Starter drives
    • F02N15/065—Starter drives with blocking means
    • 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
    • F02N15/06—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement
    • F02N2015/061—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement said axial displacement being limited, e.g. by using a stopper
    • 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
    • F02N2250/00—Problems related to engine starting or engine's starting apparatus
    • F02N2250/08—Lubrication of starters; Sealing means for starters

Definitions

  • the present invention relates to the field of thermal motor starters, especially for motor vehicles and in particular the starter starter.
  • Starters generally comprise an electric motor coupled to a drive shaft on which is mounted, slidably, a launcher.
  • the launcher comprises a bushing and a pinion is mounted on the bushing so as to be rotated by the drive shaft via the bushing.
  • the displacement in translation of the sleeve is controlled by a fork and allows the translational movement of the pinion to engage a ring gear of the engine.
  • the pinion is slidably mounted on the bushing and a spring is placed between the bushing and the pinion so as to facilitate the gearing of the pinion on the ring particularly during the reflex start phases, that is to say during hot restart phases while the engine is still running, which is very common with the "stop and go" functions increasingly common on vehicles.
  • a solution to this problem would be to use a flexible seal, such as a bellows that would be positioned around the sliding area of the pinion.
  • a flexible seal such as a bellows that would be positioned around the sliding area of the pinion.
  • the rapid movements of the pinion could create air calls inside the bellows ("dashpot effect" in English) which would have the effect of deforming the bellows and cause rapid wear of the latter .
  • a coil spring there is also a risk, because of the high rotation speeds, of centrifugation of the spring which could also damage the bellows.
  • Another solution is disclosed in FR 2,585,773 , with a cover positioned between a pinion and a socket.
  • the object of the present invention is therefore to provide a solution for protecting the portion of the sleeve on which the pinion slides and at least partially to overcome the disadvantages of the solutions of the state of the art.
  • the cover slides around the periphery of the teeth of the pinion, in particular on the periphery of the teeth.
  • the protective sleeve is rigid. This prevents the sleeve from deforming by centrifugation.
  • the chamber is impervious against impurities of more than 2 mm. This helps prevent too much impurity disrupt the operation of the launcher.
  • the protective sleeve slides on the pinion or the second portion of the sleeve. This allows the sleeve is integral in rotation and thus prevent wear due to friction between the pinion or sleeve and the sleeve due to rotation.
  • the launcher further comprises a protective element integral in translation with the pinion, the protective sleeve covering said protective element.
  • the protection element is a washer. This saves material and therefore weight.
  • the protection element is made of material with the pinion. This allows to have a single piece and thus to avoid a bad assembly.
  • a first end of the protective sleeve opposite the pinion and the peripheral portion of the second portion of the sleeve comprise complementary fastening elements comprising on the one hand at least one projection and secondly at least one annular notch, the, at least one projection being intended to come into the, at least one annular notch.
  • the launcher comprises a stop element mounted on the first portion of the socket, the stop element being integral in translation with the socket.
  • the launcher also comprises a coupling device between the drive shaft and the bushing a part of which is fixed on the bushing, said part of the coupling device attached to the bushing being situated at the level of the bushing. the second portion of the socket.
  • the second end of the sleeve the protective element comes touching the periphery of the protection element.
  • the protective sleeve extends axially beyond the protective element and comprises, at its second end, an internal annular shoulder on which the protective element bears. when the pinion is in the initial position. This allows the sleeve to serve as a stop for the initial position or a redundancy of protection with another stop element.
  • the elastic member has a variable section and the protective sleeve has a variable section so as to surround the elastic member, the space between the protective sleeve and the elastic member being less than at 2 mm. This allows the elastic element to control the deformation of the elastic element due to compression or centrifugation.
  • the protective sleeve has a conical shape.
  • the protective sleeve has a stepped shape.
  • the protective sleeve comprises internal longitudinal ribs which surround the elastic element (19), the space between the elastic element and the ribs being less than 1 mm.
  • the protective sleeve comprises at least one condensate discharge channel formed in the inner part of the protective sleeve.
  • the figure 1 is a diagram of the front part of a starter 1, the front side being indicated by the arrow 2.
  • the starter 1 comprises a housing or protective cover 3 inside which is disposed a drive shaft 5 mounted on the at least one front bearing 7 and driven at the rear by an electric motor (not shown).
  • a driver 9 is movably mounted in translation on the drive shaft 5 and is rotated by the latter.
  • a bushing 11, also called a pinion carrier, is mounted to move in translation on the front part of the drive shaft 5 and is coupled in rotation to the driver 9 via a coupling device 13 such as a clutch system. in the case of figure 1 or a freewheel system.
  • the clutch system 13 comprises a first plurality (two in this case) of coach-linked rings 13a and 13b intermingled with a second plurality (in this case three) of rings 13c, 13d and 13e connected to the bushing 11. so that compression of the rings against each other creates a coupling between the driver 9 and the sleeve 11.
  • the bushing 11 comprises a first portion 11a and a second portion 11b of greater diameter than the first portion 11a and located towards the rear (which is the opposite side to the front side) relative to the first portion 11a, the coupling device 13 being at the second portion 11b.
  • a pinion 15 is slidably mounted, between an initial position and an offset position, on the first portion 11a of the sleeve 11 and held on the sleeve 11 by a stop member 17 integral in translation with the sleeve 11 such as a circlip 17 mounted in an annular groove 18 of the first portion 11a of the sleeve 11.
  • the pinion 15 is constrained against the stop member 17 by an elastic member 19 such as a helical spring, for example frustoconical, as on the figure 1 , mounted on the first portion 11a of the sleeve 11 and compressed between the second portion 11b of the sleeve 11 and the pinion 15 which is then abutted against the stop member 17 in its initial position.
  • the assembly comprising the bushing 11, the pinion 15, the coupling device 13, the driver 9 and the associated elements such as the helical spring 19 form a launcher 20 that can be moved in translation relative to the drive shaft 5 between a rest position where the launcher comes against a back stop (not shown) and an active position as shown on the figure 1 in which the launcher 20 comes into contact with a stop element 21 mounted on the front part of the drive shaft 5.
  • the launcher 20 is moved from its rest position to its active position by a fork (not shown) of the starter 1 connected to a contactor (not shown).
  • a fork not shown
  • the pinion 15 comes into contact with a ring gear 16 of the heat engine to be started, it is in a tooth against tooth position with the ring gear 16 so that the helical spring 19 is then compressed, especially when there is a differential speed between the 16 and the pinion 15, which prevents the pinion 15 to mesh directly with the ring gear 16.
  • the pinion 15 then moves into a staggered position and is no longer in contact with the stop element 17.
  • the compression of the spring helical 19 makes it possible to facilitate the gearing of the pinion 15 on the ring gear 16.
  • the compression of the helical spring 19 also leads to the compression of the rings of the clutch system 13, which makes it possible to drive the pinion 15 in rotation.
  • the pinion 15 is geared on the ring 16 so that the two elements overlap partially.
  • a protective sleeve 23 is mounted around the coil spring 19 so as to form a chamber between the pinion 15 and the second portion 11b of the sleeve 11.
  • the protective sleeve 23 may be attached to the second portion 11b, as shown in FIG. figure 1 , and be able to slide on the outer periphery of the pinion 15 when the pinion 15 moves between the initial position and the offset position.
  • the protective sleeve 23 can be fixed on the outer periphery of the pinion 15 and be able to slide on the second portion 11b of the sleeve 11 when the pinion moves between the initial position and the offset position.
  • the fixing of the protective sleeve 23 on the second portion 11b of the sleeve 11 or on the outer periphery of the pinion 15 can be done by complementary means such as for example a notch or annular groove and a complementary bead or projection to be positioned in the housing. notch or annular groove.
  • the notch and projection can be made in a part of 360 ° or in several parts distributed around the periphery of the sleeve 11 or the pinion 15 and the sleeve 23.
  • the protective sleeve 23 is rigid so that it is not deformed under the effect of the centrifugal force during the rotation of the sleeve 11.
  • the protective sleeve 23 remains rotationally fixed to the piece on which it is fixed, respectively the second portion 11b of the sleeve 11 or the outer periphery of the pinion 15 and slides relative to the other part, respectively the outer periphery of the pinion 15 or the second portion 11b of the sleeve 11.
  • the space allowing the sliding is less than 1 mm so as to prevent the introduction of impurities of a larger size to penetrate into the chamber formed under the protective sleeve 23.
  • the protective sleeve 23 may have a variable section with a continuous profile, for example of conical shape, or of stepped or stepped shape, in particular with a spring 19 of frustoconical shape, so as to surround the spring 19 and prevent centrifugal spring 19.
  • the protective sleeve 23 is rigid, in case of centrifugation of the spring 19, the latter is held in position by the rigid protective sleeve 23 which surrounds the spring 19.
  • the spring 19 can not damage the protective sleeve 23.
  • the protective sleeve 23 is fixed on the second portion 11b of the sleeve 11 and a protective element 25 is mounted integral in translation with the pinion 15.
  • the protective element 25 is for example a washer fixed to the rear of the pinion 15 which extends radially up to a diameter greater than the outer diameter of the pinion 15.
  • the protection element 23 can also come in way with the pinion 15.
  • the front end of the protective sleeve 23 comes to cover and touch the the periphery of the protection element 25 in the initial position of the pinion 15.
  • the protective sleeve 23 remains very close to the protection element 25 so that the possibility for the impurities to be introduced under the protective sleeve 23 remains reduced.
  • the figure 3 represents a third embodiment similar to the second embodiment except for the shape of the protective sleeve 23 in which the protective sleeve 23 comprises an internal shoulder 26 at its front end which comes to touch the pinion 15, the front part of the the periphery of the protection element 25 coming into contact with the inner longitudinal edge of said shoulder 26 when the pinion 15 is in the initial position as shown in FIG. figure 3 , which makes it possible to obtain maximum sealing when the pinion 15 is in the initial position, which represents the majority of the starter 1's time.
  • FIGS. 4a and 4b represent an example of a protective sleeve 23 which can be used alone or in combination with a protective element 25 and comprising a stepped variable section, a plurality of internal beads 27 each extending over a portion of approximately 45 ° and distributed in a manner on the periphery of the inner face of the protective sleeve 23 at its end intended to be fixed on the second portion 11b of the sleeve 11.
  • the protective sleeve 23 also comprises an internal shoulder 26 at the level of the end intended to come to touch the pinion 15.
  • the protective sleeve 23 also comprises internal longitudinal ribs 29 distributed around the periphery of the protective sleeve 23 so as to surround the spring 19 and prevent its centrifugation.
  • the ribs 29 may be provided on a tubular sleeve, conical or having a stepped profile and their height may vary depending on the profile of the sleeve 23 and / or depending on the profile of the spring 19.
  • the protective sleeve 23 may also have at least one channel 31 for discharging condensation water formed in the inner part of the protective sleeve 23 so as to evacuate any moisture that may form inside the chamber formed by the sleeve 23.
  • the channels 31, four in the case of the figure 6a are formed by a groove formed inside the sleeve and passing through the circle described by the projection (s) 27 complementary fastening means so as to allow the transfer of moisture from the inside to the outside of the sleeve of protection 23.
  • the size of the channels 31 remains low, for example less than 1 mm so as to prevent the introduction of impurities into the sleeve 23 via the said channels 31.
  • the Figures 7a and 7b an example of a washer-shaped protection member 25 which is also rigid so as not to be deformed by the forces experienced by the movement of the pinion 15.
  • the protection element 25 is for example made of aluminum or aluminum. plastic.
  • the Figures 8a to 8f represent the various stages of assembly of the launcher elements 20.
  • the figure 8a represents a diagram of the bushing 11 and the coach 9.
  • the figure 8b represents a diagram of the positioning of the spring 19 around the first portion 11a of the sleeve 11 and bearing against the second portion 11b of the sleeve 11.
  • the figure 8c represents the mounting of the protection element 25 around the first portion 11a of the sleeve 11.
  • the protection element 25 coming into contact with the end of the spring 19 opposite the second portion 11b of the sleeve 11.
  • the figure 8d represents the mounting of the pinion 15 around the first part of the sleeve 11. The pinion 15 coming against the protection element 25.
  • the figure 8e represents the mounting of the stop member 17 of the pinion 15 in an annular groove 18 formed near the end of the first portion 11a of the sleeve 11.
  • the stop member 17 to prevent the separation between the sleeve 11 and the various elements mounted on the socket 11.
  • the figure 8f represents the mounting of the protective sleeve 23 which is fixed on the periphery of the second portion 11b of the sleeve 11 on the one hand and in contact with the periphery of the protection element 25 on the other hand, the sleeve surrounding the spring 19.
  • the figure 9 represents the configuration of the launcher 20 when the starter is idle.
  • the launcher 20 is in the rest position so that the pinion 15 is located away from the ring 16. No external stress is applied to the pinion 15 so that it is in abutment against the stop member 17 and that the protective element 25 bears on the protective sleeve 23, thus protecting the chamber formed by the inside of the protective sleeve 23 from the introduction of impurities.
  • the contactor When activating the starter, the contactor moves the fork which then drives the launcher 20 forward and thus the pinion 15 towards the crown 16 as indicated by the arrow 33 of the figure 9 .
  • the pinion 15 then comes to be positioned tooth against tooth with the crown 16 as represented on the figure 10 . Because the fork moves the launcher 20 forwards, the spring 19 is compressed under the combined effect of the force applied by the fork and the reaction of the crown 16 on the pinion 15. The pinion 15 is then moved axially rearwardly with respect to the bushing 11 so that the protective element 25 is also displaced axially with respect to the protective sleeve 23 which creates a gap between the protection element 25 and the protective sleeve 23. However, the space between the protective sleeve 23 and the pinion 15 remains small, that is to say a few millimeters, for example 2 mm, so that a very limited number of impurities can be introduced under the protective sleeve 23.
  • the compression of the spring 19 also causes the clutch rings clutch system 13 to engage so that the pinion 15, via the bushing 11, is rotated. This rotation allows the pinion 15 to mesh with the crown 16.
  • the figure 3 represents the starter 1 when the launcher 20 is in abutment against the stop element 21 and the pinion 15 is fully engaged on the ring gear 16.
  • the gear of the pinion 15 on the ring gear 16 causes the pinion 15 to move axially towards the forward relative to the sleeve 11 to the stop member 17 on which the pinion 15 abuts and therefore the displacement of the protective member 25 against the shoulder of the protective sleeve 23.
  • the time during which the protective element 25 is not in contact with the protective sleeve 23 corresponds to the time that the pinion 15 to engage the ring gear 16 when starting. This time is therefore very small compared to the time during which the protection element 25 is in contact with the protective sleeve 23 so that the third embodiment has a very good protection of the chamber formed by the sleeve 23 against the introduction of pollution or impurities.
  • the use of a protective sleeve 23 located around the spring 19 of the launcher 20 and rigid enough to slide and brush the pinion 15 or a protective element 25 fixed to the pinion 15 can effectively protect the sleeve 11 and the spring 19 of the presence of impurities and thus ensure the sliding of the pinion 15 on the sleeve 11 and thus the proper operation of the starter 1.
  • the protective sleeve 23 also allows its positioning as close to the spring 19 and by its rigidity to prevent the centrifugation of the spring 19, which also contributes to the proper operation of the starter 1.

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

Description

La présente invention concerne le domaine des démarreurs de moteurs thermiques, notamment pour véhicules automobiles et en particulier du lanceur de démarreur.The present invention relates to the field of thermal motor starters, especially for motor vehicles and in particular the starter starter.

Les démarreurs comportent généralement un moteur électrique couplé à un arbre d'entraînement sur lequel est montée, de manière coulissante, un lanceur. Le lanceur comprend une douille et un pignon est monté sur la douille de manière à être entraîné en rotation par l'arbre d'entraînement via la douille. Le déplacement en translation de la douille est commandé par une fourchette et permet le déplacement en translation du pignon pour venir engrener sur une couronne du moteur thermique. De plus, le pignon est monté coulissant sur la douille et un ressort est placé entre la douille et le pignon de manière à faciliter l'engrenage du pignon sur la couronne notamment lors des phases de démarrage réflexe, c'est-à-dire lors des phases de redémarrage à chaud alors que le moteur thermique tourne encore, ce qui est très courant avec les fonctions « stop and go » de plus en plus répandues sur les véhicules. Cependant, afin de maintenir la capacité du pignon de coulisser sur la douille en comprimant le ressort lorsque le pignon est dent contre dent avec la couronne, il convient de protéger la partie de la douille sur laquelle coulisse le pignon ainsi que le ressort contre la présence d'impuretés et de pollutions qui pourraient entraver ou perturber le coulissement du pignon et la compression du ressort.Starters generally comprise an electric motor coupled to a drive shaft on which is mounted, slidably, a launcher. The launcher comprises a bushing and a pinion is mounted on the bushing so as to be rotated by the drive shaft via the bushing. The displacement in translation of the sleeve is controlled by a fork and allows the translational movement of the pinion to engage a ring gear of the engine. In addition, the pinion is slidably mounted on the bushing and a spring is placed between the bushing and the pinion so as to facilitate the gearing of the pinion on the ring particularly during the reflex start phases, that is to say during hot restart phases while the engine is still running, which is very common with the "stop and go" functions increasingly common on vehicles. However, in order to maintain the ability of the pinion to slide on the sleeve by compressing the spring when the pinion is tooth against tooth with the crown, it is necessary to protect the portion of the sleeve on which slides the pinion and the spring against the presence impurities and pollution that could hinder or disrupt the sliding of the pinion and the compression of the spring.

Une solution pour résoudre ce problème serait d'utiliser un joint souple, comme par exemple un soufflet qui viendrait se positionner autour de la zone de coulissement du pignon. Cependant, avec une telle solution, les mouvements rapides du pignon pourrait créer des appels d'air à l'intérieur du soufflet (« dashpot effect » en anglais) ce qui aurait pour effet de déformer le soufflet et provoquer une usure rapide de ce dernier. Par ailleurs, avec un ressort hélicoïdal, il y a aussi un risque, du fait des vitesses de rotation élevées, de centrifugation du ressort ce qui pourrait également endommagé le soufflet. Une autre solution est divulgué dans FR 2 585 773 , avec un capot positionné entre un pignon et une douille.A solution to this problem would be to use a flexible seal, such as a bellows that would be positioned around the sliding area of the pinion. However, with such a solution, the rapid movements of the pinion could create air calls inside the bellows ("dashpot effect" in English) which would have the effect of deforming the bellows and cause rapid wear of the latter . Moreover, with a coil spring, there is also a risk, because of the high rotation speeds, of centrifugation of the spring which could also damage the bellows. Another solution is disclosed in FR 2,585,773 , with a cover positioned between a pinion and a socket.

Le but de la présente invention est donc de fournir une solution permettant de protéger la partie de la douille sur laquelle coulisse le pignon et de surmonter au moins partiellement les inconvénients des solutions de l'état de la technique.The object of the present invention is therefore to provide a solution for protecting the portion of the sleeve on which the pinion slides and at least partially to overcome the disadvantages of the solutions of the state of the art.

La présente invention a donc pour objet un lanceur de démarreur pour moteur thermique, le lanceur comprenant :

  • une douille montée mobile en translation sur un arbre d'entraînement, la douille comprenant une première portion et une seconde portion de diamètre supérieure à la première portion,
  • un pignon monté sur la première portion de la douille entre une extrémité de la première portion de la douille et la seconde portion, le pignon étant mobile en translation par rapport à la douille entre une position initiale et une position décalée dans lequel le pignon est plus éloigné de l'extrémité de la première portion de la douille qu'en position initial, - un élément élastique monté sur la première portion et disposé entre le pignon et la seconde portion de la douille configuré pour contraindre le pignon en position initiale,
caractérisé en ce que le lanceur comprend également :
  • un manchon de protection monté autour de l'élément élastique formant une chambre entre le pignon et la seconde portion de la douille et dans lequel le manchon de protection est apte à glisser sur la périphérie extérieure du pignon ou sur la seconde portion de la douille lorsque le pignon se déplace entre la position initiale et la position décalée.
The present invention therefore relates to a starter launcher for a heat engine, the launcher comprising:
  • a sleeve movable in translation on a drive shaft, the sleeve comprising a first portion and a second portion of greater diameter than the first portion,
  • a pinion mounted on the first portion of the sleeve between one end of the first portion of the sleeve and the second portion, the pinion being movable in translation relative to the sleeve between an initial position and an offset position in which the pinion is more away from the end of the first portion of the sleeve in the initial position, - an elastic element mounted on the first portion and disposed between the pinion and the second portion of the sleeve configured to constrain the pinion in the initial position,
characterized in that the launcher further comprises:
  • a protective sleeve mounted around the elastic element forming a chamber between the pinion and the second portion of the sleeve and wherein the protective sleeve is able to slide on the outer periphery of the pinion or the second portion of the sleeve when the pinion moves between the initial position and the offset position.

Cela permet de former un moyen de protection de la partie de la douille sur lequel coulisse le pignon afin d'éviter un blocage par exemple.This makes it possible to form a means for protecting the part of the bush on which the pinion slides, in order to avoid blocking, for example.

Selon un aspect de l'invention, le capot coulisse autour de la périphérie des dents du pignon, notamment sur la périphérie des dents.According to one aspect of the invention, the cover slides around the periphery of the teeth of the pinion, in particular on the periphery of the teeth.

Cela permet d'avoir un capot qui forme un préau en amont de la chambre pour empêcher les impuretés tel que poussière, graisse etc, de rentrer dans la chambre.This makes it possible to have a hood which forms a prehole upstream of the chamber to prevent impurities such as dust, grease, etc., from entering the chamber.

Selon un autre aspect de la présente invention, le manchon de protection est rigide.
Cela permet d'éviter que le manchon se déforme par la centrifugation.According to another aspect of the present invention, the protective sleeve is rigid.
This prevents the sleeve from deforming by centrifugation.

Selon un aspect supplémentaire de la présente invention, la chambre est étanche contre des impuretés de plus de 2 mm. Cela permet d'empêcher qu'une trop grosse impureté vienne perturber le fonctionnement du lanceur.According to a further aspect of the present invention, the chamber is impervious against impurities of more than 2 mm. This helps prevent too much impurity disrupt the operation of the launcher.

Selon un aspect additionnel de la présente invention, le manchon de protection coulisse sur le pignon ou sur la seconde portion de la douille. Cela permet que le manchon soit solidaire en rotation et donc d'empêcher une usure dû au frottement entre le pignon ou la douille et le manchon du fait d'une rotation.According to an additional aspect of the present invention, the protective sleeve slides on the pinion or the second portion of the sleeve. This allows the sleeve is integral in rotation and thus prevent wear due to friction between the pinion or sleeve and the sleeve due to rotation.

Selon un autre aspect de la présente invention, le lanceur comprend en outre un élément de protection solidaire en translation avec le pignon, le manchon de protection recouvrant ledit élément de protection.According to another aspect of the present invention, the launcher further comprises a protective element integral in translation with the pinion, the protective sleeve covering said protective element.

Selon un aspect supplémentaire de la présente invention, l'élément de protection est une rondelle. Cela permet de gagner de la matière et donc du poids.According to a further aspect of the present invention, the protection element is a washer. This saves material and therefore weight.

Selon un aspect additionnel de la présente invention, l'élément de protection est fait de matière avec le pignon. Cela permet d'avoir une unique pièce et donc d'éviter un mauvais montage.According to an additional aspect of the present invention, the protection element is made of material with the pinion. This allows to have a single piece and thus to avoid a bad assembly.

Selon un autre aspect de la présente invention, une première extrémité du manchon de protection opposée au pignon et la partie périphérique de la seconde portion de la douille comprennent des éléments de fixation complémentaires comprenant d'une part au moins une saillie et d'autre part au moins une encoche annulaire, la, au moins une, saillie étant destinée à venir dans la, au moins une, encoche annulaire.According to another aspect of the present invention, a first end of the protective sleeve opposite the pinion and the peripheral portion of the second portion of the sleeve comprise complementary fastening elements comprising on the one hand at least one projection and secondly at least one annular notch, the, at least one projection being intended to come into the, at least one annular notch.

Selon un autre aspect de la présente invention, le lanceur comprend un élément d'arrêt monté sur la première portion de la douille, l'élément d'arrêt étant solidaire en translation avec la douille.According to another aspect of the present invention, the launcher comprises a stop element mounted on the first portion of the socket, the stop element being integral in translation with the socket.

Selon un aspect supplémentaire de la présente invention, le lanceur comprend également un dispositif de couplage entre l'arbre d'entraînement et la douille dont une partie est fixée sur la douille, ladite partie du dispositif de couplage fixée à la douille étant située au niveau de la deuxième portion de la douille.According to a further aspect of the present invention, the launcher also comprises a coupling device between the drive shaft and the bushing a part of which is fixed on the bushing, said part of the coupling device attached to the bushing being situated at the level of the bushing. the second portion of the socket.

Selon un aspect additionnel de la présente invention, la deuxième extrémité du manchon de protection vient effleurer la périphérie de l'élément de protection.According to an additional aspect of the present invention, the second end of the sleeve the protective element comes touching the periphery of the protection element.

Selon un autre aspect de la présente invention, le manchon de protection s'étend axialement au-delà de l'élément de protection et comprend, au niveau de sa deuxième extrémité un épaulement annulaire interne sur lequel vient s'appuyer l'élément de protection lorsque le pignon est en position initiale.
Cela permet que le manchon puisse servir de butée pour la position initiale ou encore d'une redondance de protection avec un autre élément d'arrêt.According to another aspect of the present invention, the protective sleeve extends axially beyond the protective element and comprises, at its second end, an internal annular shoulder on which the protective element bears. when the pinion is in the initial position.
This allows the sleeve to serve as a stop for the initial position or a redundancy of protection with another stop element.

Selon un aspect supplémentaire de la présente invention, l'élément élastique a une section variable et le manchon de protection a une section variable de manière à entourer l'élément élastique, l'espace entre le manchon de protection et l'élément élastique étant inférieur à 2 mm. Cela permet de laisser l'élément élastique de maitriser la déformation de l'élément élastique du fait de la compression ou de la centrifugation.According to a further aspect of the present invention, the elastic member has a variable section and the protective sleeve has a variable section so as to surround the elastic member, the space between the protective sleeve and the elastic member being less than at 2 mm. This allows the elastic element to control the deformation of the elastic element due to compression or centrifugation.

Selon un aspect additionnel de la présente invention, le manchon de protection a une forme conique.According to an additional aspect of the present invention, the protective sleeve has a conical shape.

Cela permet de gagner en volume du démarreur.This allows to gain volume of the starter.

Selon un autre aspect de la présente invention, le manchon de protection a une forme étagée.According to another aspect of the present invention, the protective sleeve has a stepped shape.

Selon un aspect supplémentaire de la présente invention, le manchon de protection comprend des nervures longitudinales internes qui viennent entourer l'élément élastique (19), l'espace entre l'élément élastique et les nervures étant inférieur à 1 mm.According to a further aspect of the present invention, the protective sleeve comprises internal longitudinal ribs which surround the elastic element (19), the space between the elastic element and the ribs being less than 1 mm.

Selon un aspect additionnel de la présente invention, le manchon de protection comprend au moins un canal d'évacuation d'eau de condensation ménagé dans la partie interne du manchon de protection.According to an additional aspect of the present invention, the protective sleeve comprises at least one condensate discharge channel formed in the inner part of the protective sleeve.

Cela permet d'évacuer l'eau produite par condensation.This allows to evacuate the water produced by condensation.

La présente invention concerne également un démarreur comprenant un lanceur tel que décrit précédemment.
Selon un aspect de l'invention, le démarreur comprend en outre un contacteur pour déplacer le lanceur entre une position repos et une position engrenée, le contacteur comprenant :

  • une fourchette formant levier pour déplacer le lanceur de sa position repos vers la position engrenée et vice-versa,
  • un noyau fixe,
  • un noyau mobile entre une position repos et une position active en contact avec le noyau fixe, le noyau mobile déplaçant le lanceur de sa position repos vers sa position engrenée et vice versa par le biais de la fourchette,
  • au moins une bobine d'appel pour déplacer le noyau mobile de sa position repos vers la position actif, un ressort de rappel pour ramener le noyau mobile vers la position repos lorsque la bobine n'est pas alimentée, et un ressort de dent contre dent monté dans le noyau mobile, le ressort dent dent se comprimant lorsque le pignon est dent contre dent de la couronne pour démarrer le moteur thermique pour permettre au noyau mobile de continuer à se déplacer vers le noyau fixe.
Selon un aspect de la précédente invention, le contacteur comprend en outre une tige de commande mobile, deux bornes électriques, une plaquette de contact mobile sur la tige de commande, et en ce que le noyau mobile déplace la tige de commande pour déplacer la plaquette de contact vers les bornes de contact jusqu'à ce que celle-ci ferme le contact entre les deux bornes pour alimenter le moteur électrique.The present invention also relates to a starter comprising a launcher as described above.
According to one aspect of the invention, the starter further comprises a contactor for moving the launcher between a rest position and an interengaged position, the contactor comprising:
  • a lever fork to move the launcher from its rest position to the position meshed and vice versa,
  • a fixed core,
  • a movable core between a rest position and an active position in contact with the fixed core, the movable core moving the launcher from its rest position to its engaged position and vice versa through the fork,
  • at least one call coil for moving the movable core from its rest position to the active position, a return spring for returning the movable core to the rest position when the coil is not energized, and a tooth spring against the tooth mounted in the movable core, the tooth tooth spring compresses when the pinion is tooth against tooth crown to start the engine to allow the movable core to continue to move to the fixed core.
According to one aspect of the invention, the contactor further comprises a movable control rod, two electrical terminals, a movable contact pad on the control rod, and in that the movable core moves the control rod to move the plate. contact to the contact terminals until the latter closes the contact between the two terminals to supply the electric motor.

D'autres caractéristiques et avantages de l'invention apparaîtront dans la description qui va maintenant en être faite, en référence aux dessins annexés qui en représentent, à titre indicatif mais non limitatif, des modes de réalisation possibles.Other features and advantages of the invention will appear in the description which will now be made, with reference to the accompanying drawings which show, by way of indication but not limitation, possible embodiments.

Sur ces dessins:

  • la figure 1 représente un schéma de la partie avant d'un démarreur comprenant le lanceur selon un premier mode de réalisation de la présente invention;
  • la figure 2 représente un schéma de la partie avant d'un démarreur comprenant le lanceur selon un deuxième mode de réalisation de la présente invention;
  • la figure 3 représente un schéma de la partie avant d'un démarreur comprenant le lanceur selon un troisième mode de réalisation de la présente invention;
  • les figure 4a et 4b représentent un schéma d'un manchon de protection selon un premier mode de réalisation de la présente invention;
  • la figure 5 représente un schéma d'un manchon de protection selon un deuxième mode de réalisation de la présente invention;
  • les figure 6a et 6b représentent un schéma d'un manchon de protection selon un troisième mode de réalisation de la présente invention;
  • les figure 7a et 7b représentent un schéma d'un élément de protection selon un premier mode de réalisation de la présente invention;
  • les figure 8a à 8f représentent des schémas des différentes étapes d'assemblage d'un lanceur selon un mode de réalisation de la présente invention;
  • la figure 9 représente un schéma de la partie avant d'un démarreur comprenant le lanceur selon un troisième mode de réalisation de la présente invention dans une position de repos;
  • la figure 10 représente un schéma de la partie avant d'un démarreur comprenant le lanceur selon un troisième mode de réalisation de la présente invention dans une position dent contre dent ;
On these drawings:
  • the figure 1 represents a diagram of the front portion of a starter comprising the launcher according to a first embodiment of the present invention;
  • the figure 2 is a diagram of the front portion of a starter comprising the launcher according to a second embodiment of the present invention;
  • the figure 3 is a diagram of the front portion of a starter comprising the launcher according to a third embodiment of the present invention;
  • the Figure 4a and 4b represent a diagram of a protective sleeve according to a first mode embodiment of the present invention;
  • the figure 5 shows a schematic of a protective sleeve according to a second embodiment of the present invention;
  • the Figure 6a and 6b show a schematic of a protective sleeve according to a third embodiment of the present invention;
  • the Figure 7a and 7b represent a diagram of a protection element according to a first embodiment of the present invention;
  • the figure 8a to 8f are diagrams of the various steps of assembling a launcher according to an embodiment of the present invention;
  • the figure 9 is a diagram of the front portion of a starter comprising the launcher according to a third embodiment of the present invention in a rest position;
  • the figure 10 is a diagram of the front portion of a starter comprising the launcher according to a third embodiment of the present invention in a tooth against tooth position;

Sur ces figures, les mêmes numéros de référence désignent des éléments identiques.In these figures, the same reference numbers designate identical elements.

La figure 1 représente un schéma de la partie avant d'un démarreur 1, le côté avant étant indiqué par la flèche 2. Le démarreur 1 comprend un carter ou capot de protection 3 à l'intérieur duquel est disposé un arbre d'entraînement 5 monté sur au moins un palier avant 7 et entraîné à l'arrière par un moteur électrique (non représenté). Un entraîneur 9 est monté mobile en translation sur l'arbre d'entraînement 5 et est entraîné en rotation par ce dernier. Une douille 11, aussi appelée porte-pignon, est montée mobile en translation sur la partie avant de l'arbre d'entraînement 5 et est couplée en rotation à l'entraîneur 9 via un dispositif de couplage 13 tels qu'un système à embrayage dans le cas de la figure 1 ou un système à roue libre. Le système à embrayage 13 comprend une première pluralité (deux dans le cas présent) de bagues 13a et 13b liées à l'entraîneur entremêlées à une deuxième pluralité (trois dans le cas présent) de bagues 13c, 13d et 13e liées à la douille 11 de sorte que la compression des bagues les unes contre les autres crée un couplage entre l'entraîneur 9 et la douille 11.The figure 1 is a diagram of the front part of a starter 1, the front side being indicated by the arrow 2. The starter 1 comprises a housing or protective cover 3 inside which is disposed a drive shaft 5 mounted on the at least one front bearing 7 and driven at the rear by an electric motor (not shown). A driver 9 is movably mounted in translation on the drive shaft 5 and is rotated by the latter. A bushing 11, also called a pinion carrier, is mounted to move in translation on the front part of the drive shaft 5 and is coupled in rotation to the driver 9 via a coupling device 13 such as a clutch system. in the case of figure 1 or a freewheel system. The clutch system 13 comprises a first plurality (two in this case) of coach-linked rings 13a and 13b intermingled with a second plurality (in this case three) of rings 13c, 13d and 13e connected to the bushing 11. so that compression of the rings against each other creates a coupling between the driver 9 and the sleeve 11.

La douille 11 comprend une première portion 11a et une seconde portion 11b de diamètre supérieure à la première portion 11a et située vers l'arrière (qui est le côté opposé au côté avant) par rapport à la première portion 11a, le dispositif de couplage 13 se trouvant au niveau de la second portion 11b.The bushing 11 comprises a first portion 11a and a second portion 11b of greater diameter than the first portion 11a and located towards the rear (which is the opposite side to the front side) relative to the first portion 11a, the coupling device 13 being at the second portion 11b.

Un pignon 15 est monté coulissant, entre une position initiale et une position décalée, sur la première portion 11a de la douille 11 et maintenu sur la douille 11 par un élément d'arrêt 17 solidaire en translation avec la douille 11 tel qu'un circlip 17 monté dans une gorge annulaire 18 de la première portion 11a de la douille 11. Le pignon 15 est contraint contre l'élément d'arrêt 17 par un élément élastique 19 tel qu'un ressort hélicoïdal, par exemple tronconique, comme sur la figure 1, monté sur la première portion 11a de la douille 11 et comprimé entre la second portion 11b de la douille 11 et le pignon 15 qui est alors en butée contre l'élément d'arrêt 17 dans sa position initiale.A pinion 15 is slidably mounted, between an initial position and an offset position, on the first portion 11a of the sleeve 11 and held on the sleeve 11 by a stop member 17 integral in translation with the sleeve 11 such as a circlip 17 mounted in an annular groove 18 of the first portion 11a of the sleeve 11. The pinion 15 is constrained against the stop member 17 by an elastic member 19 such as a helical spring, for example frustoconical, as on the figure 1 , mounted on the first portion 11a of the sleeve 11 and compressed between the second portion 11b of the sleeve 11 and the pinion 15 which is then abutted against the stop member 17 in its initial position.

L'ensemble comprenant la douille 11, le pignon 15, le dispositif de couplage 13, l'entraîneur 9 et les éléments associés comme le ressort hélicoïdal 19 forme un lanceur 20 mobile en translation par rapport à l'arbre d'entraînement 5 entre une position de repos où le lanceur vient contre une butée arrière (non représentée) et une position active telle que représenté sur la figure 1 dans laquelle le lanceur 20 vient en contact avec un élément d'arrêt 21 monté sur la partie avant de l'arbre d'entraînement 5.The assembly comprising the bushing 11, the pinion 15, the coupling device 13, the driver 9 and the associated elements such as the helical spring 19 form a launcher 20 that can be moved in translation relative to the drive shaft 5 between a rest position where the launcher comes against a back stop (not shown) and an active position as shown on the figure 1 in which the launcher 20 comes into contact with a stop element 21 mounted on the front part of the drive shaft 5.

Ainsi, en fonctionnement, le lanceur 20 est déplacé de sa position de repos vers sa position active par une fourchette (non représentée) du démarreur 1 reliée à un contacteur (non représenté). Lorsque le pignon 15 entre en contact avec une couronne 16 du moteur thermique à démarrer, il est dans une position dent contre dent avec la couronne 16 de sorte que le ressort hélicoïdal 19 est alors comprimé, notamment lorsqu'il existe une vitesse différentielle entre la couronne 16 et le pignon 15, qui empêche au pignon 15 d'engrener directement sur la couronne 16. Le pignon 15 passe alors dans une position décalée et n'est plus en contact avec l'élément d'arrêt 17. La compression du ressort hélicoïdal 19 permet de faciliter l'engrenage du pignon 15 sur la couronne 16. De plus, la mise en compression du ressort hélicoïdal 19 conduit également à la compression des bagues du système à embrayage 13 ce qui permet d'entraîner en rotation le pignon 15. Sur la figure 1, le pignon 15 est engrené sur la couronne 16 de sorte que les deux éléments se superposent partiellement.Thus, in operation, the launcher 20 is moved from its rest position to its active position by a fork (not shown) of the starter 1 connected to a contactor (not shown). When the pinion 15 comes into contact with a ring gear 16 of the heat engine to be started, it is in a tooth against tooth position with the ring gear 16 so that the helical spring 19 is then compressed, especially when there is a differential speed between the 16 and the pinion 15, which prevents the pinion 15 to mesh directly with the ring gear 16. The pinion 15 then moves into a staggered position and is no longer in contact with the stop element 17. The compression of the spring helical 19 makes it possible to facilitate the gearing of the pinion 15 on the ring gear 16. Moreover, the compression of the helical spring 19 also leads to the compression of the rings of the clutch system 13, which makes it possible to drive the pinion 15 in rotation. . On the figure 1 , the pinion 15 is geared on the ring 16 so that the two elements overlap partially.

L'action de coulissement du pignon 15 par rapport à la douille 11 et l'action du ressort hélicoïdal 19 pour contraindre le pignon 15 vers la couronne 16 en position active du lanceur 20 apparaissent donc primordiales pour le bon fonctionnement du démarreur 1. Il convient donc d'empêcher tout corps étranger ou impureté de faire obstacle au coulissement du pignon 15 sur la douille 11 et à la compression du ressort hélicoïdal 19.The sliding action of the pinion 15 relative to the sleeve 11 and the action of the coil spring 19 to constrain the pinion 15 towards the ring 16 in the active position of the launcher 20 Therefore, it is essential to prevent any foreign body or impurity from obstructing the sliding of the pinion 15 on the bushing 11 and the compression of the coil spring 19.

Pour cela, un manchon de protection 23 est monté autour du ressort hélicoïdal 19 de manière à former une chambre entre le pignon 15 et la seconde portion 11b de la douille 11.For this, a protective sleeve 23 is mounted around the coil spring 19 so as to form a chamber between the pinion 15 and the second portion 11b of the sleeve 11.

Le manchon de protection 23 peut être fixé sur la seconde portion 11b, comme représenté sur la figure 1, et être apte à glisser sur la périphérie extérieure du pignon 15 lorsque le pignon 15 se déplace entre la position initiale et la position décalée.The protective sleeve 23 may be attached to the second portion 11b, as shown in FIG. figure 1 , and be able to slide on the outer periphery of the pinion 15 when the pinion 15 moves between the initial position and the offset position.

Alternativement, le manchon de protection 23 peut être fixé sur la périphérie extérieure du pignon 15 et être apte à glisser sur la seconde portion 11b de la douille 11 lorsque le pignon se déplace entre la position initiale et la position décalée.Alternatively, the protective sleeve 23 can be fixed on the outer periphery of the pinion 15 and be able to slide on the second portion 11b of the sleeve 11 when the pinion moves between the initial position and the offset position.

La fixation du manchon de protection 23 sur la seconde portion 11b de la douille 11 ou sur la périphérie extérieure du pignon 15 peut se faire par des moyens complémentaires comme par exemple une encoche ou gorge annulaire et un bourrelet ou saillie complémentaire venant se positionner dans l'encoche ou gorge annulaire. L'encoche et la saillie pouvant être réalisés en une partie de 360° ou en plusieurs parties réparties sur le pourtour de la douille 11 ou du pignon 15 et du manchon 23.The fixing of the protective sleeve 23 on the second portion 11b of the sleeve 11 or on the outer periphery of the pinion 15 can be done by complementary means such as for example a notch or annular groove and a complementary bead or projection to be positioned in the housing. notch or annular groove. The notch and projection can be made in a part of 360 ° or in several parts distributed around the periphery of the sleeve 11 or the pinion 15 and the sleeve 23.

De plus, le manchon de protection 23 est rigide de sorte qu'il n'est pas déformé sous l'effet de la force centrifuge lors de la rotation de la douille 11. Ainsi, le manchon de protection 23 reste solidaire en rotation à la pièce sur laquelle il est fixé, respectivement la seconde portion 11b de la douille 11 ou la périphérie extérieure du pignon 15 et coulisse par rapport à l'autre pièce, respectivement la périphérie extérieure du pignon 15 ou la seconde portion 11b de la douille 11. L'espace permettant le coulissement est inférieur à 1 mm de manière à empêcher l'introduction d'impuretés d'une taille supérieure de pénétrer dans la chambre formée sous le manchon de protection 23.In addition, the protective sleeve 23 is rigid so that it is not deformed under the effect of the centrifugal force during the rotation of the sleeve 11. Thus, the protective sleeve 23 remains rotationally fixed to the piece on which it is fixed, respectively the second portion 11b of the sleeve 11 or the outer periphery of the pinion 15 and slides relative to the other part, respectively the outer periphery of the pinion 15 or the second portion 11b of the sleeve 11. The space allowing the sliding is less than 1 mm so as to prevent the introduction of impurities of a larger size to penetrate into the chamber formed under the protective sleeve 23.

Par ailleurs, le manchon de protection 23 peut avoir une section variable avec un profil continu, par exemple de forme conique, ou de forme étagée ou en escalier, notamment avec un ressort 19 de forme tronconique, de manière à entourer le ressort 19 et empêcher la centrifugation du ressort 19. En effet, le manchon de protection 23 étant rigide, en cas de centrifugation du ressort 19, ce dernier est maintenu en position par le manchon de protection 23 rigide qui entoure le ressort 19. De plus, à la différence d'un soufflet souple, le ressort 19 ne peut endommager le manchon de protection 23.Furthermore, the protective sleeve 23 may have a variable section with a continuous profile, for example of conical shape, or of stepped or stepped shape, in particular with a spring 19 of frustoconical shape, so as to surround the spring 19 and prevent centrifugal spring 19. In fact, the protective sleeve 23 is rigid, in case of centrifugation of the spring 19, the latter is held in position by the rigid protective sleeve 23 which surrounds the spring 19. In addition, unlike a flexible bellows, the spring 19 can not damage the protective sleeve 23.

Selon un deuxième mode de réalisation représenté sur la figure 2, le manchon de protection 23 est fixé sur la seconde portion 11b de la douille 11 et un élément de protection 25 est monté solidaire en translation avec le pignon 15. L'élément de protection 25 est par exemple une rondelle fixée à l'arrière du pignon 15 qui s'étend radialement jusqu'à un diamètre supérieur au diamètre extérieur du pignon 15. L'élément de protection 23 peut également venir de manière avec le pignon 15. L'extrémité avant du manchon de protection 23 vient recouvrir et effleurer la périphérie de l'élément de protection 25 dans la position initiale du pignon 15. De plus, même en position décalée du pignon 15, le manchon de protection 23 reste très proche de l'élément de protection 25 de sorte que la possibilité pour les impuretés de s'introduire sous le manchon de protection 23 reste réduite.According to a second embodiment shown on the figure 2 , the protective sleeve 23 is fixed on the second portion 11b of the sleeve 11 and a protective element 25 is mounted integral in translation with the pinion 15. The protective element 25 is for example a washer fixed to the rear of the pinion 15 which extends radially up to a diameter greater than the outer diameter of the pinion 15. The protection element 23 can also come in way with the pinion 15. The front end of the protective sleeve 23 comes to cover and touch the the periphery of the protection element 25 in the initial position of the pinion 15. In addition, even in the offset position of the pinion 15, the protective sleeve 23 remains very close to the protection element 25 so that the possibility for the impurities to be introduced under the protective sleeve 23 remains reduced.

La figure 3 représente un troisième mode de réalisation similaire au deuxième mode de réalisation excepté concernant la forme du manchon de protection 23 dans lequel le manchon de protection 23 comprend un épaulement interne 26 au niveau de son extrémité avant qui vient effleurer le pignon 15, la partie avant de la périphérie de l'élément de protection 25 venant en contact avec le bord longitudinal interne dudit épaulement 26 lorsque le pignon 15 est en position initiale comme représenté sur la figure 3, ce qui permet d'obtenir une étanchéité maximale lorsque le pignon 15 est en position initiale ce qui représente la majorité du temps du démarreur 1.The figure 3 represents a third embodiment similar to the second embodiment except for the shape of the protective sleeve 23 in which the protective sleeve 23 comprises an internal shoulder 26 at its front end which comes to touch the pinion 15, the front part of the the periphery of the protection element 25 coming into contact with the inner longitudinal edge of said shoulder 26 when the pinion 15 is in the initial position as shown in FIG. figure 3 , which makes it possible to obtain maximum sealing when the pinion 15 is in the initial position, which represents the majority of the starter 1's time.

Les figures 4a et 4b représentent un exemple de manchon de protection 23 qui peut être utilisé seul ou en combinaison avec un élément de protection 25 et comprenant une section variable en escalier, plusieurs bourrelets internes 27 s'étendant chacun sur une portion d'environ 45° et répartis de manière régulière sur le pourtour de la face interne du manchon de protection 23 au niveau de son extrémité destinée a venir se fixer sur la seconde portion 11b de la douille 11. Le manchon de protection 23 comprend également un épaulement interne 26 au niveau de l'extrémité destinée à venir effleurer le pignon 15.The Figures 4a and 4b represent an example of a protective sleeve 23 which can be used alone or in combination with a protective element 25 and comprising a stepped variable section, a plurality of internal beads 27 each extending over a portion of approximately 45 ° and distributed in a manner on the periphery of the inner face of the protective sleeve 23 at its end intended to be fixed on the second portion 11b of the sleeve 11. The protective sleeve 23 also comprises an internal shoulder 26 at the level of the end intended to come to touch the pinion 15.

Selon un mode de réalisation alternatif représenté sur la figure 5, le manchon de protection 23 comprend également des nervures longitudinales internes 29 réparties sur le pourtour du manchon de protection 23 de manière à venir entourer le ressort 19 et empêcher sa centrifugation. Les nervures 29 peuvent être prévues sur un manchon tubulaire, conique ou présentant un profil étagé et leur hauteur peut varier en fonction du profil du manchon 23 et/ou en fonction du profil du ressort 19.According to an alternative embodiment represented on the figure 5 , the protective sleeve 23 also comprises internal longitudinal ribs 29 distributed around the periphery of the protective sleeve 23 so as to surround the spring 19 and prevent its centrifugation. The ribs 29 may be provided on a tubular sleeve, conical or having a stepped profile and their height may vary depending on the profile of the sleeve 23 and / or depending on the profile of the spring 19.

Par ailleurs, comme représenté sur les figures 6a et 6b, le manchon de protection 23 peut également présenter au moins un canal 31 d'évacuation d'eau de condensation ménagé dans la partie interne du manchon de protection 23 de manière à évacuer l'humidité qui pourrait se former à l'intérieur de la chambre formée par le manchon 23. Les canaux 31, quatre dans le cas de la figure 6a, sont formés par une gorge ménagée à l'intérieur du manchon et traversant le cercle décrit par la ou les saillies 27 des moyens complémentaires de fixation de manière à permettre le transfert de l'humidité de l'intérieur vers l'extérieur du manchon de protection 23. La taille des canaux 31 reste faible, par exemple inférieure à 1 mm de manière à éviter l'introduction d'impuretés dans le manchon 23 via les lesdits canaux 31.Moreover, as represented on Figures 6a and 6b , the protective sleeve 23 may also have at least one channel 31 for discharging condensation water formed in the inner part of the protective sleeve 23 so as to evacuate any moisture that may form inside the chamber formed by the sleeve 23. The channels 31, four in the case of the figure 6a , are formed by a groove formed inside the sleeve and passing through the circle described by the projection (s) 27 complementary fastening means so as to allow the transfer of moisture from the inside to the outside of the sleeve of protection 23. The size of the channels 31 remains low, for example less than 1 mm so as to prevent the introduction of impurities into the sleeve 23 via the said channels 31.

Les figures 7a et 7b représentent un exemple d'élément de protection 25 en forme de rondelle et qui est également rigide de manière à ne pas être déformée par les forces subies par le mouvement du pignon 15. L'élément de protection 25 est par exemple réalisé en aluminium ou en plastique.
Les figures 8a à 8f représentent les différentes étapes d'assemblage des éléments du lanceur 20.The Figures 7a and 7b an example of a washer-shaped protection member 25 which is also rigid so as not to be deformed by the forces experienced by the movement of the pinion 15. The protection element 25 is for example made of aluminum or aluminum. plastic.
The Figures 8a to 8f represent the various stages of assembly of the launcher elements 20.

La figure 8a représente un schéma de la douille 11 et de l'entraîneur 9.The figure 8a represents a diagram of the bushing 11 and the coach 9.

La figure 8b représente un schéma du positionnement du ressort 19 autour de la première portion 11a de la douille 11 et en appui contre la seconde portion 11b de la douille 11.The figure 8b represents a diagram of the positioning of the spring 19 around the first portion 11a of the sleeve 11 and bearing against the second portion 11b of the sleeve 11.

La figure 8c représente le montage de l'élément de protection 25 autour de la première portion 11a de la douille 11. L'élément de protection 25 venant en contact avec l'extrémité du ressort 19 opposée à la seconde portion 11b de la douille 11.The figure 8c represents the mounting of the protection element 25 around the first portion 11a of the sleeve 11. The protection element 25 coming into contact with the end of the spring 19 opposite the second portion 11b of the sleeve 11.

La figure 8d représente le montage du pignon 15 autour de la première partie de la douille 11. Le pignon 15 venant contre l'élément de protection 25.The figure 8d represents the mounting of the pinion 15 around the first part of the sleeve 11. The pinion 15 coming against the protection element 25.

La figure 8e représente le montage de l'élément d'arrêt 17 du pignon 15 dans une gorge annulaire 18 ménagée près de l'extrémité de la première portion 11a de la douille 11. L'élément d'arrêt 17 venant empêcher la désolidarisation entre la douille 11 et les différents éléments montés sur la douille 11.The figure 8e represents the mounting of the stop member 17 of the pinion 15 in an annular groove 18 formed near the end of the first portion 11a of the sleeve 11. The stop member 17 to prevent the separation between the sleeve 11 and the various elements mounted on the socket 11.

La figure 8f représente le montage du manchon de protection 23 qui vient se fixer sur la périphérie de la seconde portion 11b de la douille 11 d'une part et en contact avec la périphérie de l'élément de protection 25 d'autre part, le manchon entourant le ressort 19.The figure 8f represents the mounting of the protective sleeve 23 which is fixed on the periphery of the second portion 11b of the sleeve 11 on the one hand and in contact with the periphery of the protection element 25 on the other hand, the sleeve surrounding the spring 19.

Le fonctionnement du lanceur 20 va maintenant être décrit à partir des figures 3, 9 et 10 qui représentent le troisième mode de réalisation respectivement dans différentes configurations du lanceur 20.The operation of the launcher 20 will now be described from the figures 3 , 9 and 10 which represent the third embodiment respectively in different configurations of the launcher 20.

La figure 9 représente la configuration du lanceur 20 lorsque le démarreur est inactif. Le lanceur 20 est en position de repos de sorte que le pignon 15 est situé à distance de la couronne 16. Aucune contrainte extérieure n'est appliquée sur la pignon 15 de sorte qu'il est en butée contre l'élément d'arrêt 17 et que l'élément de protection 25 est en appui sur la manchon de protection 23, protégeant ainsi la chambre formée par l'intérieur du manchon de protection 23 de l'introduction d'impuretés.The figure 9 represents the configuration of the launcher 20 when the starter is idle. The launcher 20 is in the rest position so that the pinion 15 is located away from the ring 16. No external stress is applied to the pinion 15 so that it is in abutment against the stop member 17 and that the protective element 25 bears on the protective sleeve 23, thus protecting the chamber formed by the inside of the protective sleeve 23 from the introduction of impurities.

Lors de l'activation du démarreur, le contacteur déplace la fourchette qui entraîne alors le lanceur 20 vers l'avant et donc le pignon 15 vers la couronne 16 comme indiqué par la flèche 33 de la figure 9.When activating the starter, the contactor moves the fork which then drives the launcher 20 forward and thus the pinion 15 towards the crown 16 as indicated by the arrow 33 of the figure 9 .

Le pignon 15 vient alors se positionner dent contre dent avec la couronne 16 comme représenté sur la figure 10. Du fait que la fourchette déplace le lanceur 20 vers l'avant, le ressort 19 est comprimé sous l'effet conjoint de la force appliquée par la fourchette et de la réaction de la couronne 16 sur le pignon 15. Le pignon 15 est alors déplacé axialement vers l'arrière par rapport à la douille 11 de sorte que l'élément de protection 25 est également déplacé axialement par rapport au manchon de protection 23 ce qui crée un espace entre l'élément de protection 25 et le manchon de protection 23. Cependant, l'espace entre le manchon de protection 23 et le pignon 15 reste faible, c'est à dire quelques millimètres par exemple 2mm de sorte qu'un nombre très limité d'impuretés peut s'introduire sous le manchon de protection 23.The pinion 15 then comes to be positioned tooth against tooth with the crown 16 as represented on the figure 10 . Because the fork moves the launcher 20 forwards, the spring 19 is compressed under the combined effect of the force applied by the fork and the reaction of the crown 16 on the pinion 15. The pinion 15 is then moved axially rearwardly with respect to the bushing 11 so that the protective element 25 is also displaced axially with respect to the protective sleeve 23 which creates a gap between the protection element 25 and the protective sleeve 23. However, the space between the protective sleeve 23 and the pinion 15 remains small, that is to say a few millimeters, for example 2 mm, so that a very limited number of impurities can be introduced under the protective sleeve 23.

Par ailleurs, la compression du ressort 19 entraîne également l'embrayage des bagues du système d'embrayage 13 de sorte que le pignon 15, via la douille 11, est entraîné en rotation. Cette rotation permet au pignon 15 d'engrener sur la couronne 16.Furthermore, the compression of the spring 19 also causes the clutch rings clutch system 13 to engage so that the pinion 15, via the bushing 11, is rotated. This rotation allows the pinion 15 to mesh with the crown 16.

La figure 3 représente le démarreur1 lorsque le lanceur 20 est en butée contre l'élément d'arrêt 21 et le pignon 15 est engrené complètement sur la couronne 16. L'engrenage du pignon 15 sur la couronne 16 entraîne le déplacement du pignon 15 axialement vers l'avant par rapport à la douille 11 jusqu'à l'élément d'arrêt 17 sur lequel le pignon 15 vient en butée et par conséquent le déplacement de l'élément de protection 25 contre l'épaulement du manchon de protection 23. Le temps pendant lequel l'élément de protection 25 n'est pas en contact avec le manchon de protection 23 correspond au temps que met le pignon 15 pour engrener sur la couronne 16 lors d'un démarrage. Ce temps est donc très réduit par rapport au temps pendant lequel l'élément de protection 25 est en contact avec le manchon de protection 23 de sorte que le troisième mode de réalisation présente une très bonne protection de la chambre formée par le manchon 23 contre l'introduction de pollution ou d'impuretés.The figure 3 represents the starter 1 when the launcher 20 is in abutment against the stop element 21 and the pinion 15 is fully engaged on the ring gear 16. The gear of the pinion 15 on the ring gear 16 causes the pinion 15 to move axially towards the forward relative to the sleeve 11 to the stop member 17 on which the pinion 15 abuts and therefore the displacement of the protective member 25 against the shoulder of the protective sleeve 23. The time during which the protective element 25 is not in contact with the protective sleeve 23 corresponds to the time that the pinion 15 to engage the ring gear 16 when starting. This time is therefore very small compared to the time during which the protection element 25 is in contact with the protective sleeve 23 so that the third embodiment has a very good protection of the chamber formed by the sleeve 23 against the introduction of pollution or impurities.

Ainsi, l'utilisation d'un manchon de protection 23 situé autour du ressort 19 du lanceur 20 et suffisamment rigide pour glisser et effleurer le pignon 15 ou une élément de protection 25 fixé au pignon 15 permet de protéger efficacement la douille 11 et le ressort 19 de la présence d'impuretés et ainsi d'assurer le coulissement du pignon 15 sur la douille 11 et donc le bon fonctionnement du démarreur 1. Par ailleurs, le manchon de protection 23 permet également de par son positionnement au plus près du ressort 19 et de par sa rigidité d'empêcher la centrifugation du ressort 19, ce qui contribue également au bon fonctionnement du démarreur 1.Thus, the use of a protective sleeve 23 located around the spring 19 of the launcher 20 and rigid enough to slide and brush the pinion 15 or a protective element 25 fixed to the pinion 15 can effectively protect the sleeve 11 and the spring 19 of the presence of impurities and thus ensure the sliding of the pinion 15 on the sleeve 11 and thus the proper operation of the starter 1. Moreover, the protective sleeve 23 also allows its positioning as close to the spring 19 and by its rigidity to prevent the centrifugation of the spring 19, which also contributes to the proper operation of the starter 1.

Claims (15)

  1. Drive (20) for a starter (1) for a combustion engine, the drive (20) comprising:
    - a bushing (11) mounted with the ability to move translationally along a drive shaft (5), the bushing comprising a first portion (11a) and a second portion (11b) of greater diameter than the first portion (11a),
    - a pinion (15) mounted on the first portion (11a) of the bushing (11) between the end of the first portion of the bushing and the second portion (11b), the pinion (15) being able to move translationally with respect to the bushing (11) between an initial position and an offset position in which the pinion is further away from the end of the first portion of the bushing than in the initial position,
    - an elastic element (19) mounted on the first portion (11a) and positioned between the pinion (15) and the second portion (11b) of the bushing (11) and configured to force the pinion (15) into the initial position,
    characterized in that the drive (20) also comprises:
    - a protective sleeve (23) mounted around the elastic element (19) and forming a chamber between the pinion (15) and the second portion (11b) of the bushing (11), and in which the protective sleeve (23) is able to slide on the exterior periphery of the pinion (15) or on the second portion (11b) of the bushing (11) when the pinion (15) moves between the initial position and the offset position.
  2. Drive (20) according to Claim 1, in which the protective sleeve (23) is rigid.
  3. Drive (20) according to Claim 1 or 2, in which the chamber is impervious to impurities measuring more than 2 mm.
  4. Drive (20) according to one of the preceding claims, in which the protective sleeve (23) slides on the pinion (15) or on the second portion (11b) of the bushing (11).
  5. Drive (20) according to one of the preceding claims, further comprising a protective element (25) moving as one with the pinion (15) in translational movement, the protective sleeve (23) covering the said protective element (25).
  6. Drive (20) according to Claim 5, in which the protective element (25) is a washer.
  7. Drive (20) according to Claim 5 or 6, in which the protective element (25) is made as one with the pinion (15) .
  8. Drive (20) according to one of the preceding claims, in which a first end of the protective sleeve (23) of the opposite end to the pinion (15) and the peripheral part of the second portion (11b) of the bushing (11) comprise complementary fixing elements comprising, on the one hand, at least one projection, and on the other hand, at least one annular notch, the at least one projection being intended to fit into the at least one annular notch.
  9. Drive (20) according to one of Claims 5 to 8, in which, when the pinion is in the initial position, the second end of the protective sleeve (23) lies flush with the periphery of the protective element (25).
  10. Drive (20) according to one of Claims 5 to 8, in which the protective sleeve (23) extends axially beyond the protective element (25) and comprises, at its second end, an internal annular shoulder (26) against which the protective element (25) presses when the pinion (15) is in the initial position.
  11. Drive (20) according to one of the preceding claims, in which the elastic element (19) has a variable cross section and the protective sleeve (23) has a variable cross section so as to surround the elastic element (19), the space between the protective sleeve (23) and the elastic element (19) being smaller than 2mm.
  12. Drive (20) according to Claim 11, in which the protective sleeve (23) has a conical shape.
  13. Drive (20) according to one of the preceding claims, in which the protective sleeve (23) comprises internal longitudinal ribs (29) which surround the elastic element (19), the space between the elastic element (19) and the ribs (29) being smaller than 1 mm.
  14. Drive (20) according to one of the preceding claims, in which the protective sleeve (23) comprises at least one condensation-removal channel (31) formed in the internal part of the protective sleeve (23).
  15. Starter (1) comprising a drive (20) according to one of the preceding claims.
EP15172950.6A 2014-06-20 2015-06-19 Starter drive and associated starter Active EP2957761B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1455712A FR3022593A1 (en) 2014-06-20 2014-06-20 STARTER LAUNCHER AND STARTER STARTER

Publications (2)

Publication Number Publication Date
EP2957761A1 EP2957761A1 (en) 2015-12-23
EP2957761B1 true EP2957761B1 (en) 2018-12-19

Family

ID=51570610

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15172950.6A Active EP2957761B1 (en) 2014-06-20 2015-06-19 Starter drive and associated starter

Country Status (2)

Country Link
EP (1) EP2957761B1 (en)
FR (1) FR3022593A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3056260B1 (en) * 2016-09-16 2018-08-31 Valeo Equipements Electriques Moteur STARTER WITH PINION HOLDER AND PINION

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2585773A1 (en) * 1985-07-30 1987-02-06 Paris & Du Rhone Device for advancing the starting member of an electric starter
JPH1182251A (en) * 1997-09-11 1999-03-26 Hitachi Ltd Starter
FR2858367B1 (en) * 2003-05-30 2006-01-27 Valeo Equip Electr Moteur DEVICE FOR ANGULAR POSITIONING OF A STARTER CYLINDER HEAD IN RELATION TO ITS SUPPORT

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
FR3022593A1 (en) 2015-12-25
EP2957761A1 (en) 2015-12-23

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