EP1613858A2 - Electromagnetic contactor for controlling an electric starter - Google Patents

Electromagnetic contactor for controlling an electric starter

Info

Publication number
EP1613858A2
EP1613858A2 EP04742368A EP04742368A EP1613858A2 EP 1613858 A2 EP1613858 A2 EP 1613858A2 EP 04742368 A EP04742368 A EP 04742368A EP 04742368 A EP04742368 A EP 04742368A EP 1613858 A2 EP1613858 A2 EP 1613858A2
Authority
EP
European Patent Office
Prior art keywords
core
fixed core
tank
contactor
rib
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.)
Granted
Application number
EP04742368A
Other languages
German (de)
French (fr)
Other versions
EP1613858B1 (en
Inventor
Frédéric TALON
Pierre Magnier
Christophe Gruet
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
Original Assignee
Valeo Equipements Electriques Moteur SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valeo Equipements Electriques Moteur SAS filed Critical Valeo Equipements Electriques Moteur SAS
Publication of EP1613858A2 publication Critical patent/EP1613858A2/en
Application granted granted Critical
Publication of EP1613858B1 publication Critical patent/EP1613858B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • 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
    • F02N11/00—Starting of engines by means of electric motors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/02—Non-polarised relays
    • H01H51/04—Non-polarised relays with single armature; with single set of ganged armatures
    • H01H51/06—Armature is movable between two limit positions of rest and is moved in one direction due to energisation of an electromagnet and after the electromagnet is de-energised is returned by energy stored during the movement in the first direction, e.g. by using a spring, by using a permanent magnet, by gravity
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/02—Non-polarised relays
    • H01H51/04—Non-polarised relays with single armature; with single set of ganged armatures
    • H01H51/06—Armature is movable between two limit positions of rest and is moved in one direction due to energisation of an electromagnet and after the electromagnet is de-energised is returned by energy stored during the movement in the first direction, e.g. by using a spring, by using a permanent magnet, by gravity
    • H01H51/065—Relays having a pair of normally open contacts rigidly fixed to a magnetic core movable along the axis of a solenoid, e.g. relays for starting automobiles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/36—Stationary parts of magnetic circuit, e.g. yoke

Definitions

  • Electromagnetic contactor for controlling an electric starter.
  • the invention relates to an electromagnetic contactor for an electric motor starter, said contactor comprising: connection terminals intended to be connected to the battery and to the electric motor, a movable core, a main fixed core an axial air gap formed between the movable core and the main fixed core, a tubular coil to generate, during excitation, a magnetic flux in the axial air gap formed between the movable core, and a main fixed core,
  • a magnetic circuit provided with a tank arranged in a magnetic yoke fixed to the fixed core, an insulating cover enclosing the contacts of the electric power circuit and carrying the connection terminals,
  • - Said tank being composed of a metallic envelope in the shape of a bell, of an internal ferrule of magnetic material surrounding the coil, and of a washer playing the role of additional fixed core crossed by the movable core, and arranged at the opposite of the main stationary core.
  • Starters generally include an electromagnetic contactor whose role is to allow: - the engagement of the pinion in the toothed ring gear at start-up, as well as its disengagement after start-up,
  • the contactor is generally constituted by an electromagnet actuating a plunger core, which by moving, closes an electric circuit for the supply of the electric motor, and pulls on an actuation lever which propels the pinion in the starting toothed ring .
  • FIG. 5 (see FIG. 5) comprises a rotary electric motor M and an output shaft fitted with a drive pinion 1 of a starting gear ring C, integral in rotation with the vehicle engine flywheel to ensure the starting of the combustion engine of the vehicle.
  • the pinion 1 is slidably mounted, via complementary grooves, on the output shaft between a rest position in which it is disengaged from the toothed ring, and an active working position in which it meshes with said ring.
  • the output shaft is rotated by the electric motor when the latter is electrically powered.
  • This shaft is distinct from the shaft of the motor M in FIG. 6 because a gear speed reducer intervenes between the two shafts.
  • the output shaft is the shaft of the motor M.
  • the electric motor of the starter is also associated with a power contactor 2 with an electromagnet disposed above the electric motor.
  • This contactor 2 comprises a tubular coil 2a carried by a support, the bottom of which constitutes a pad 2c for guiding a movable core 2b.
  • This contactor 2 has a dual function of supplying the electric motor M with current, and of moving the movable pinion 1 between the two rest and working positions.
  • the excitation of the electromagnet is controlled for example by the actuation of the ignition key, which establishes the electrical circuit towards the battery, following the closing of the main power circuit of the contactor.
  • the movable core 2b of the contactor 2 is mechanically connected by a mechanical link 4, comprising a control lever, to a launcher equipped with a freewheel transmission device.
  • the pinion 1 belongs to the launcher.
  • the fork-shaped control lever is pivotally mounted on an axis and the output shaft is rotatably mounted in a housing by means of bearings.
  • the casing is intended to be fixed on a fixed part of the vehicle and is open for the passage of the crown C. This casing thus serves to fix the starter to the engine of the vehicle.
  • the main power circuit of the contactor is provided with a pair of fixed contacts, and with a movable contact 3 in the form of a bridge, which is secured to an actuating pusher intended to be moved in translation by the movable core during excitation of the coil.
  • the pusher is intended to be moved by the movable core 2b after an axial play has been taken up and a second return spring acts on the movable core to return the latter to the rest position.
  • a first return spring urges the movable contact and pusher assembly towards an open position so as to provide an axial gap with the fixed contacts.
  • This rest position of the pusher is determined by contact of the movable contact 3 with a fixed core with a central hole for guiding the pusher provided with a shoulder for mounting a spring, called contact pressure spring, acting between this shoulder and the contact. mobile.
  • the fixed core is shouldered and has a centering surface for centering the support of the coil 2a.
  • a spring 5 housed inside the movable core 2b and engaged with a rod connected by an axis to the upper end of the fork-shaped control lever for coupling this.
  • lever at the movable core 2b The generally cylindrical contactor is located near the electric motor, extending parallel to the latter. It is fixed on the casing supra which supports the output shaft and the pinion slidably mounted on this shaft.
  • the casing also carries the cylinder head of the electric motor M closed by a rear bearing for the rotary mounting of the shaft of the electric motor M.
  • the casing carries a front bearing for the rotary mounting of the extending output shaft the shaft of the electric motor M with the intervention of a bearing between the ends of these shafts.
  • the contactor comprises a fixed part made of magnetic material, and a cover made of insulating material and comprising the connection terminals connected to the fixed contacts.
  • the fixed part of the contactor is composed of a tank-shaped cylinder head, shaped to be attached to the casing, and of the fixed core separated from the movable core by an axial air gap.
  • the tubular coil coaxially surrounds the movable core with a slight radial clearance, and is housed inside the tank.
  • the movable core under the action of the second return spring, is in a position spaced from the fixed core when the coil is not excited.
  • the mobile core moves by magnetic attraction towards the fixed core at first against the restoring force of the first return spring.
  • the movable core displaces the pusher against the force exerted by the second and the first return springs.
  • This first return spring is of greater stiffness than the second return spring and has a lower stiffness than the contact pressure spring.
  • the launcher moves, under the action of the control lever, in the direction of the crown C. If the pinion 1 does not penetrate directly into the crown C, the spring 5 is compressed to allow the closing of the fixed contacts and feed the electric motor, which then turns the pinion so that it enters the crown C
  • the structure of the magnetic circuit of such a contactor is well known, for example from the document DE 101 55 103 or from the document FR A 2 795 884 cited above.
  • the fixed core 10 of the contactor is generally immobilized in rotation relative to the fixed tank 11 by one or more deformations of the side wall of the tank, so as to constitute notches 12 which become embedded in cavities 13 formed at the periphery or at the rear of the fixed core 10.
  • indelicate manipulation of the tank can generate a risk of separation of the assembly.
  • the cover 14 must also be locked in rotation relative to the tank 11 to support a certain tightening torque C on the connection terminals.
  • the notches 12a provided for this purpose are also produced by deformation of the material at the end of the tank 11, followed by insertion into the cavities 13a of the cover 14. After exceeding a certain tightening torque on the cover 14 , the latter may undergo a start of rotational movement with a risk of escapement of the notches 12a. This case can occur in the event of insufficient mechanical rigidity of a tank obtained by stamping from a thin sheet (0.5 to 1, 5mm). The risk of ovalization of the tank under the action of a high torque is then possible, and the function of immobilization in rotation of the tank is no longer ensured.
  • the object of the invention is to remedy the aforementioned drawbacks, and to produce a starter contactor having a tank with mechanical strength reinforced, regardless of the tightening torque exerted on the connection terminals.
  • the device according to the invention is characterized in that the metal shell of the tank comprises an annular rib extending continuously opposite the cylindrical periphery of the main fixed core, said rib having an internal diameter respectively greater than that of the shell and lower than that of the envelope, so as to ensure the timing of the different parts of the tank.
  • said rib ensures both the setting of the different parts of the tank and the crimping of the envelope on the fixed core following local deformations exerted on the reduced diameter of the constriction delimiting the rib.
  • the presence of the rib at the end of the casing of the contactor makes it possible to ensure both a stable maintenance of the ferrule and the washer inside the casing, and a stiffening of the tank 11 avoiding any deformation due to the torque exerted on the cover when tightening the connection terminals.
  • the rib can serve as a centering device for the fixed core so that the quantity of material can be reduced. With this type of arrangement, it is possible to use fixed cores of the standard type, the size of the tank being dimensioned accordingly.
  • the cover is a pressure cover acting on the fixed core, which acts on the shell.
  • the main fixed core is provided with radial cavities in which notches of the casing fit during the crimping operation.
  • the cover comprises at least one axial lug intended to engage in a notch in the fixed core when the cover is assembled on the end of the cover.
  • the notch for receiving the post can be confused with a cavity in the fixed core.
  • Figure 1 is a partial view of the contactor according to the prior art, at the level of the fixing of the tank on the fixed core;
  • Figure 2 shows a partial view of the contactor according to the prior art, at the level of the fixing of the tank on the insulating connection cover;
  • Figure 3 shows a sectional view of the contactor tank according to the invention;
  • Figure 4 is a perspective view of the tank of Figure 3;
  • FIG. 5 illustrates a half-section view of the contactor equipped with the tank of FIG. 3;
  • Figure 6 is an axial sectional view of a starter of the prior art.
  • the tank 11 is produced in several elements, comprising a metal envelope 15 in the shape of a bell, an internal cylindrical ferrule 16 in mild steel, and a washer 17 in magnetic material acting as an additional fixed core.
  • the casing 15, of cylindrical shape has a bottom 115 which is perforated centrally for passage of the core 18. This bottom has a transverse orientation relative to the axis XX of the contactor CT and is configured to form a protuberance centrally at its internal periphery 116 axial directed in the direction opposite to the washer 17.
  • the protrusion 116 is of annular shape.
  • this envelope 15 is obtained economically by deep drawing.
  • the axis XX constitutes the axis of the coil 22, of the movable core 18 and of the pusher 101 intended to be moved by the movable core 18 via an internal washer 103 secured to the core 18.
  • the contact pressure spring at 24 the first return spring, namely the cut-off spring, at 121 the second return spring and at 5 the teeth against teeth spring. All these springs are here helical springs.
  • the washer 103 of the movable core 18 closes a cavity terminated by a bottom open centrally for the passage of the rod 117 connected by the axis 118 to the control lever not shown.
  • the teeth against teeth spring 5 is supported on this bottom and on a stepped end of the rod 18.
  • a cup 120 is fixed, here by crimping, to the movable core 18. This cup serves to support one of the ends of the second return spring 121.
  • the protrusion 116 serves as a support for the other end of the spring 121 so that the envelope has an additional function.
  • the washer 17 bears against the bottom 115 of the casing 15, and comprises in the central part a circular orifice 19 allowing the axial passage of the movable core 18.
  • the central protrusion 116 of the bottom 115 also has a circular orifice allowing the passage axial of the core 18.
  • the cylindrical side wall of the envelope 15 undergoes a local constriction so as to provide an annular rib 21 opposite the location of the fixed core 10.
  • the constriction is obtained, for example, by a deformation of the material resulting in a reduction in the diameter obtained by rolling over the entire outer circumference of the envelope 15.
  • the internal diameter D1 of the rib 21 is greater than the internal diameter of the ferrule 16, and less than the diameter D3 of the envelope 15.
  • the thickness H of the rib 21 measured in the axial direction, is less than or equal to the thickness of the fixed core 10.
  • the ferrule 16 is advantageously in intimate contact through its external periphery with the internal periphery of the casing 15.
  • the same is true as regards the washer 17.
  • These parts 16, 17 are advantageously made of mild steel as well as the casing 15. so that they are electrically conductive and that the magnetic flux can pass through these parts when the coil 22 is electrically supplied.
  • the washer 17 can have the required thickness.
  • the envelope 15 can undergo a surface treatment to give it an aesthetic appearance.
  • the envelope 15 is made of non-magnetic material, for example based on aluminum.
  • the casing 15, the ferrule 16 and the washer 17 may be of square, rectangular, polygonal or other section.
  • the bottom 115 protects the washer 17 which is thus susceptible to corrosion.
  • the thickness of the washer 17 is greater than that of the ferrule 16.
  • the coil 22 is mounted, having an annular support 220. with a U-shaped section.
  • the coil 22, via its annular support 220, and the washer 17 are mounted on a support tube 23 forming a cushion for the core 18 and bearing on an annular flange 99 for centering and axial orientation of the fixed core 10.
  • This flange 99 is extended at one of its ends by a flange 100 of transverse orientation transverse orientation with respect to the axis X X.
  • This flange forms a support shoulder and therefore an axial stop for the support 220 and for the tube 23.
  • the support 23 passes through the orifice 19 of the casing 15 and of the protuberance
  • a first return spring 24 biases the movable contact 25 in a bridge against the fixed core 10, providing an axial gap with the fixed contacts 26, only one of which is visible in FIG. 5.
  • the flange 100 is here of cylindrical shape. Its external periphery comes into intimate contact with the internal periphery of the rib 21, which thus serves as a centering device for the flange 100 and therefore the fixed core 10.
  • the rib 21 therefore also makes it possible to reduce the height of the flange 100 and therefore the quantity of material of the fixed core, which is thus more economical.
  • the internal periphery of the rib 21, and therefore of the constriction comprises a cylindrical portion, as visible in FIG. 3, serving as a centering device for the flange 100.
  • This portion has the abovementioned internal diameter D1.
  • Two inclined flanks extend on either side of this centering portion to delimit therewith the rib 21.
  • One of these inclined flanks, the flank 210 adjacent to the free end of the ferrule 16, allows to tighten this ferrule so that it comes to bear on the washer 17, which itself bears on the bottom 115.
  • This inclined flank 210 is therefore a clamping flank.
  • the groove has another shape, for example overall a V shape with a rounded tip of section similar to that of the notches 12 a of FIG. 2.
  • Several local deformations of the casing 15 can be made from the outside on the reduced diameter of the internal rib 21, so as to locally repel the metal in the cavities 13 of the flange 100 of the fixed core 10 to block the latter in rotation.
  • the local deformations are preferably trapezoidal in shape. This creates a crimping of the envelope on the fixed core.
  • the base of the cover 14 is provided with tenons 27 intended to engage axially in the notches of the fixed core 10.
  • the notches coincide with the cavities 13 receiving the metal pushed back during the crimping of the casing 15
  • local deformations of the end of the casing 15 are carried out at the level of the cover 14, so as to create notches 12a ensuring the immobilization in rotation of the cover 14.
  • These notches 12a are advantageously received in cavities of the cover as in FIG. 2.
  • This cover by means of its base exerts a clamping action on the flange 100 of the fixed core 10, knowing that the cover is inclined at the level of the cavities receiving î the notches 12a so that these notches exert an axial force on the cover.
  • the parts 17, 16, 100 and 14 are therefore clamped between the bottom 115 and the notches 12 a.
  • the metal of the envelope 15 is pushed back into the cavities 13 after fixing the cover.
  • this operation can also be carried out before fixing the cover, the material being folded down at the notches being produced with the press.
  • the casing 15 can be thin because of the presence of the stiffening rib 21.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (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)
  • Motor Or Generator Frames (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

The metal housing (15) of the case (11) of a contactor (CT) comprises an annular rib (21) extending continuously opposite the cylindrical periphery of the main stationary core (10), said rib having an internal diameter (D1) respectively greater than that of the ferrule (16) and smaller than that of the housing (15), so as to ensure the locking of the different parts of the case (11) and the crimping of the housing (15) on the stationary magnet (10) following local deformations exerted on the reduced diameter of the swaged part defining the rib (21). The invention is applicable to a contactor for motor vehicle starter.

Description

Contacteur électromagnétique de commande d'un démarreur électrique. Electromagnetic contactor for controlling an electric starter.
Domaine technique de l'inventionTechnical field of the invention
L'invention est relative à un contacteur électromagnétique pour un démarreur à moteur électrique, ledit contacteur comprenant : des bornes de connexion destinées à être raccordées à la batterie et au moteur électrique, un noyau mobile, un noyau fixe principal un entrefer axial ménagé entre le noyau mobile et le noyau fixe principal, une bobine tubulaire pour engendrer lors de l'excitation un flux magnétique dans l'entrefer axial ménagé entre le noyau mobile, et un noyau fixe principal,The invention relates to an electromagnetic contactor for an electric motor starter, said contactor comprising: connection terminals intended to be connected to the battery and to the electric motor, a movable core, a main fixed core an axial air gap formed between the movable core and the main fixed core, a tubular coil to generate, during excitation, a magnetic flux in the axial air gap formed between the movable core, and a main fixed core,
- un circuit magnétique doté d'une cuve agencée en culasse magnétique fixée au noyau fixe, un capot isolant renfermant les contacts du circuit électrique de puissance et portant les bornes de connexion,a magnetic circuit provided with a tank arranged in a magnetic yoke fixed to the fixed core, an insulating cover enclosing the contacts of the electric power circuit and carrying the connection terminals,
- ladite cuve étant composée d'une enveloppe métallique en forme de cloche, d'une virole interne en matériau magnétique entourant la bobine, et d'une rondelle jouant le rôle de noyau fixe additionnel traversé par le noyau mobile, et agencée à l'opposé du noyau fixe principal.- Said tank being composed of a metallic envelope in the shape of a bell, of an internal ferrule of magnetic material surrounding the coil, and of a washer playing the role of additional fixed core crossed by the movable core, and arranged at the opposite of the main stationary core.
Etat de la techniqueState of the art
Les démarreurs comportent généralement un contacteur électromagnétique dont le rôle est de permettre : - l'engagement du pignon dans la couronne dentée d'entraînement au moment du démarrage, ainsi que son désengagement après le démarrage,Starters generally include an electromagnetic contactor whose role is to allow: - the engagement of the pinion in the toothed ring gear at start-up, as well as its disengagement after start-up,
- et l'alimentation en courant du moteur électrique.- and the current supply to the electric motor.
Le contacteur est généralement constitué par un électro-aimant actionnant un noyau plongeur, qui en se déplaçant, ferme un circuit électrique pour l'alimentation du moteur électrique, et tire sur un levier d'actionnement qui propulse le pignon dans la couronne dentée de démarrage.The contactor is generally constituted by an electromagnet actuating a plunger core, which by moving, closes an electric circuit for the supply of the electric motor, and pulls on an actuation lever which propels the pinion in the starting toothed ring .
Selon le document FR-A-2795884, un démarreur de véhicule automobileAccording to document FR-A-2795884, a motor vehicle starter
(voir figure 5) comporte un moteur électrique rotatif M et un arbre de sortie équipé d'un pignon d'entraînement 1 d'une couronne dentée de démarrage C, solidaire en rotation du volant moteur du véhicule pour assurer le démarrage du moteur à combustion du véhicule. Le pignon 1 est monté à coulissement, via des cannelures complémentaires, sur l'arbre de sortie entre une position de repos dans laquelle il est désengagé de la couronne dentée, et une position active de travail dans laquelle il engrène avec ladite couronne.(see FIG. 5) comprises a rotary electric motor M and an output shaft fitted with a drive pinion 1 of a starting gear ring C, integral in rotation with the vehicle engine flywheel to ensure the starting of the combustion engine of the vehicle. The pinion 1 is slidably mounted, via complementary grooves, on the output shaft between a rest position in which it is disengaged from the toothed ring, and an active working position in which it meshes with said ring.
L'arbre de sortie est entraîné en rotation par le moteur électrique lorsque celui-ci est alimenté électriquement. Cet arbre est distinct de l'arbre du moteur M à la figure 6 car un réducteur de vitesse à engrenages intervient entre les deux arbres. En variante l'arbre de sortie est l'arbre du moteur M.The output shaft is rotated by the electric motor when the latter is electrically powered. This shaft is distinct from the shaft of the motor M in FIG. 6 because a gear speed reducer intervenes between the two shafts. As a variant, the output shaft is the shaft of the motor M.
Le moteur électrique du démarreur est également associé à un contacteur de puissance 2 à électro-aimant disposé au-dessus du moteur électrique. Ce contacteur 2 comporte une bobine tubulaire 2a portée par un support dont le fond constitue un coussinet 2c pour le guidage d'un noyau mobile 2b.The electric motor of the starter is also associated with a power contactor 2 with an electromagnet disposed above the electric motor. This contactor 2 comprises a tubular coil 2a carried by a support, the bottom of which constitutes a pad 2c for guiding a movable core 2b.
Ce contacteur 2 a une double fonction d'alimentation du moteur électrique M en courant, et de déplacement du pignon mobile 1 entre les deux positions de repos et de travail. L'excitation de l'électro-aimant est pilotée par exemple par l'actionnement de la clé de contact, qui établit le circuit électrique vers la batterie, suite à la fermeture du circuit principal de puissance du contacteur. Le noyau mobile 2b du contacteur 2 est relié mécaniquement par une liaison mécanique 4, comprenant un levier de commande, à un lanceur équipé d'un dispositif de transmission à roue libre. Le pignon 1 appartient au lanceur.This contactor 2 has a dual function of supplying the electric motor M with current, and of moving the movable pinion 1 between the two rest and working positions. The excitation of the electromagnet is controlled for example by the actuation of the ignition key, which establishes the electrical circuit towards the battery, following the closing of the main power circuit of the contactor. The movable core 2b of the contactor 2 is mechanically connected by a mechanical link 4, comprising a control lever, to a launcher equipped with a freewheel transmission device. The pinion 1 belongs to the launcher.
Le levier de commande en forme de fourchette est monté à pivotement sur un axe et l'arbre de sortie est monté à rotation dans un carter par l'intermédiaire de paliers.The fork-shaped control lever is pivotally mounted on an axis and the output shaft is rotatably mounted in a housing by means of bearings.
Le carter est destiné à être fixé sur une partie fixe du véhicule et est ouvert pour le passage de la couronne C. Ce carter sert ainsi à fixer le démarreur sur le moteur du véhicule. Le circuit principal de puissance du contacteur est doté d'une paire de contacts fixes, et d'un contact mobile 3 en forme de pont, lequel est solidarisé à un poussoir d'actionnement destiné à être déplacé en translation par le noyau mobile lors de l'excitation de la bobine.The casing is intended to be fixed on a fixed part of the vehicle and is open for the passage of the crown C. This casing thus serves to fix the starter to the engine of the vehicle. The main power circuit of the contactor is provided with a pair of fixed contacts, and with a movable contact 3 in the form of a bridge, which is secured to an actuating pusher intended to be moved in translation by the movable core during excitation of the coil.
Plus précisément le poussoir est destiné à être déplacé par le noyau mobile 2b après rattrapage d'un jeu axial et un deuxième ressort de rappel agit sur le noyau mobile pour rappeler celui-ci dans la position de repos.More specifically, the pusher is intended to be moved by the movable core 2b after an axial play has been taken up and a second return spring acts on the movable core to return the latter to the rest position.
Un premier ressort de rappel, dit ressort de coupure, sollicite l'ensemble contact mobile et poussoir vers une position d'ouverture de manière à ménager un intervalle axial avec les contacts fixes. Cette position de repos du poussoir est déterminée par contact du contact mobile 3 avec un noyau fixe troué centralement pour guidage du poussoir doté d'un épaulement pour montage d'un ressort, dit ressort de pression de contact, agissant entre cet épaulement et le contact mobile. Le noyau fixe est épaulé et présente une portée de centrage pour centrage du support de la bobine 2a.A first return spring, called cut-off spring, urges the movable contact and pusher assembly towards an open position so as to provide an axial gap with the fixed contacts. This rest position of the pusher is determined by contact of the movable contact 3 with a fixed core with a central hole for guiding the pusher provided with a shoulder for mounting a spring, called contact pressure spring, acting between this shoulder and the contact. mobile. The fixed core is shouldered and has a centering surface for centering the support of the coil 2a.
Il est également prévu un ressort 5, dit ressort dents contre dents, logé à l'intérieur du noyau mobile 2b et en prise avec une tige reliée par un axe à l'extrémité supérieure du levier de commande en forme de fourchette pour attelage de ce levier au noyau mobile 2b. Le contacteur de forme générale cylindrique, est situé à proximité du moteur électrique, en s' étendant parallèlement à ce dernier. Il est fixé sur le carter précité qui supporte l'arbre de sortie et le pignon monté à coulissement sur cet arbre. De manière connue le carter porte également la culasse du moteur électrique M fermée par un palier arrière pour le montage à rotation de l'arbre du moteur électrique M. Le carter porte un palier avant pour le montage à rotation de l'arbre de sortie prolongeant l'arbre du moteur électrique M avec l'intervention d'un palier entre les extrémités de ces arbres.There is also a spring 5, called a tooth against tooth spring, housed inside the movable core 2b and engaged with a rod connected by an axis to the upper end of the fork-shaped control lever for coupling this. lever at the movable core 2b. The generally cylindrical contactor is located near the electric motor, extending parallel to the latter. It is fixed on the casing supra which supports the output shaft and the pinion slidably mounted on this shaft. In a known manner, the casing also carries the cylinder head of the electric motor M closed by a rear bearing for the rotary mounting of the shaft of the electric motor M. The casing carries a front bearing for the rotary mounting of the extending output shaft the shaft of the electric motor M with the intervention of a bearing between the ends of these shafts.
En plus du noyau mobile, le contacteur comporte une partie fixe en matière magnétique, et un capot en matière isolant et comprenant les bornes de connexion reliées aux contacts fixes. La partie fixe du contacteur est composée d'une culasse en forme de cuve, conformée pour être rapportée sur le carter, et du noyau fixe séparé du noyau mobile par un entrefer axial. La bobine tubulaire entoure coaxialement le noyau mobile avec un léger jeu radial, et est logée à l'intérieur de la cuve.In addition to the movable core, the contactor comprises a fixed part made of magnetic material, and a cover made of insulating material and comprising the connection terminals connected to the fixed contacts. The fixed part of the contactor is composed of a tank-shaped cylinder head, shaped to be attached to the casing, and of the fixed core separated from the movable core by an axial air gap. The tubular coil coaxially surrounds the movable core with a slight radial clearance, and is housed inside the tank.
Le noyau mobile, sous l'action du second ressort de rappel se trouve en position écartée par rapport au noyau fixe lorsque la bobine n'est pas excitée.The movable core, under the action of the second return spring, is in a position spaced from the fixed core when the coil is not excited.
Lors de l'alimentation électrique de la bobine, c'est-à-dire lors de l'excitation de la bobine, le noyau mobile se déplace par attraction magnétique en direction du noyau fixe dans un premier temps à encontre de la force de rappel du premier ressort de rappel. Après rattrapage du jeu axial entre le noyau mobile et le poussoir, dans un deuxième temps, le noyau mobile déplace le poussoir à l'encontre de la force exercée par le deuxième et le premier ressorts de rappel. Ce premier ressort de rappel est de plus forte raideur que le second ressort de rappel et a une raideur plus faible que le ressort de pression de contact.During the electrical supply of the coil, that is to say during the excitation of the coil, the mobile core moves by magnetic attraction towards the fixed core at first against the restoring force of the first return spring. After taking up the axial clearance between the movable core and the pusher, in a second step, the movable core displaces the pusher against the force exerted by the second and the first return springs. This first return spring is of greater stiffness than the second return spring and has a lower stiffness than the contact pressure spring.
Ce mouvement se poursuit jusqu'à venu en prise du contact mobile avec les contact fixes et alimentation du moteur électrique. Ensuite le ressort de pression de contact est comprimé jusqu'à contact du noyau mobile avec le noyau fixe.This movement continues until it comes into contact with the mobile contact with the fixed contacts and supply of the electric motor. Then the contact pressure spring is compressed until contact of the movable core with the fixed core.
En même temps le lanceur se déplace, sous l'action du levier de commande, en direction de la couronne C. En cas de non pénétration directe du pignon 1 dans la couronne C , le ressort 5 est comprimé pour autoriser la fermeture des contacts fixes et alimenter le moteur électrique , qui fait alors tourner le pignon pour que celui-ci pénètre dans la couronne CAt the same time the launcher moves, under the action of the control lever, in the direction of the crown C. If the pinion 1 does not penetrate directly into the crown C, the spring 5 is compressed to allow the closing of the fixed contacts and feed the electric motor, which then turns the pinion so that it enters the crown C
La structure du circuit magnétique d'un tel contacteur est bien connue, par exemple du document DE 101 55 103 ou par le document FR A 2 795 884 précité.The structure of the magnetic circuit of such a contactor is well known, for example from the document DE 101 55 103 or from the document FR A 2 795 884 cited above.
Sur la figure 1 , le noyau fixe 10 du contacteur est généralement immobilisé en rotation par rapport à la cuve 11 fixe par une ou plusieurs déformations de la paroi latérale de la cuve, de manière à constituer des crantages 12 venant s'incruster dans des cavités 13 ménagées à la périphérie ou à l'arrière du noyau fixe 10. Dans le cas où la cuve est réalisée par empilage de plusieurs éléments, une manipulation indélicate de la cuve peut engendrer un risque de désolidarisation de l'ensemble.In FIG. 1, the fixed core 10 of the contactor is generally immobilized in rotation relative to the fixed tank 11 by one or more deformations of the side wall of the tank, so as to constitute notches 12 which become embedded in cavities 13 formed at the periphery or at the rear of the fixed core 10. In the case where the tank is made by stacking several elements, indelicate manipulation of the tank can generate a risk of separation of the assembly.
Sur la figure 2, le capot 14 doit également être bloqué en rotation par rapport à la cuve 11 pour supporter un certain couple C de serrage sur les bornes de connexion. Les crantages 12a prévus à cet effet sont également réalisés par déformation de la matière de l'extrémité de la cuve 11 , suivie de l'insertion dans des cavités 13a du capot 14. Après dépassement d'un certain couple de serrage sur le capot 14, ce dernier peut subir un début de mouvement de rotation avec un risque d'échappement des crantages 12a. Ce cas peut se produire en cas d'insuffisance de rigidité mécanique d'une cuve obtenue par emboutissage à partir d'une tôle de faible épaisseur (0,5 à 1 ,5mm). Le risque d'ovalisation de la cuve sous l'action d'un couple de rotation important est alors possible, et la fonction d'immobilisation en rotation de la cuve n'est plus assurée.In FIG. 2, the cover 14 must also be locked in rotation relative to the tank 11 to support a certain tightening torque C on the connection terminals. The notches 12a provided for this purpose are also produced by deformation of the material at the end of the tank 11, followed by insertion into the cavities 13a of the cover 14. After exceeding a certain tightening torque on the cover 14 , the latter may undergo a start of rotational movement with a risk of escapement of the notches 12a. This case can occur in the event of insufficient mechanical rigidity of a tank obtained by stamping from a thin sheet (0.5 to 1, 5mm). The risk of ovalization of the tank under the action of a high torque is then possible, and the function of immobilization in rotation of the tank is no longer ensured.
Objet de l'inventionSubject of the invention
L'objet de l'invention consiste à remédier aux inconvénients précités, et à réaliser un contacteur de démarreur ayant une cuve à tenue mécanique renforcée, indépendamment du couple de serrage exercé sur les bornes de connexion.The object of the invention is to remedy the aforementioned drawbacks, and to produce a starter contactor having a tank with mechanical strength reinforced, regardless of the tightening torque exerted on the connection terminals.
Le dispositif selon l'invention est caractérisé en ce que l'enveloppe métallique de la cuve comporte une nervure annulaire s'étendânt en continu en regard de la périphérie cylindrique du noyau fixe principal, ladite nervure ayant un diamètre interne respectivement supérieur à celui de la virole et inférieur à celui de l'enveloppe, de manière à assurer le calage des différentes pièces de la cuve.The device according to the invention is characterized in that the metal shell of the tank comprises an annular rib extending continuously opposite the cylindrical periphery of the main fixed core, said rib having an internal diameter respectively greater than that of the shell and lower than that of the envelope, so as to ensure the timing of the different parts of the tank.
Avantageusement la dite nervure assure à la fois le calage des différentes pièces de la cuve et le sertissage de l'enveloppe sur le noyau fixe suite à des déformations locales exercées sur le diamètre réduit du rétreint délimitant la nervure.Advantageously, said rib ensures both the setting of the different parts of the tank and the crimping of the envelope on the fixed core following local deformations exerted on the reduced diameter of the constriction delimiting the rib.
La présence de la nervure à l'extrémité de l'enveloppe du contacteur permet d'assurer à la fois un maintien stable de la virole et de la rondelle à l'intérieur de l'enveloppe, et une rigidification de la cuve 11 évitant toute déformation due au couple de rotation exercé sur le capot lors du serrage des bornes de connexion. En outre la nervure peut servir de centreur au noyau fixe en sorte que l'on peut réduire la quantité de matière de celui-ci. Avec ce type de disposition on peut utiliser des noyaux fixes du type standard, la taille de la cuve étant dimensionnée en conséquence. Le capot est un capot presseur agissant sur le noyau fixe, lequel agit sur la virole.The presence of the rib at the end of the casing of the contactor makes it possible to ensure both a stable maintenance of the ferrule and the washer inside the casing, and a stiffening of the tank 11 avoiding any deformation due to the torque exerted on the cover when tightening the connection terminals. In addition, the rib can serve as a centering device for the fixed core so that the quantity of material can be reduced. With this type of arrangement, it is possible to use fixed cores of the standard type, the size of the tank being dimensioned accordingly. The cover is a pressure cover acting on the fixed core, which acts on the shell.
Selon un mode de réalisation préférentiel, le noyau fixe principal est pourvu de cavités radiales dans lesquelles s'encastrent des crantages de l'enveloppe au cours de l'opération de sertissage. Le capot comporte au moins un tenon axial destiné à s'engager dans une encoche du noyau fixe lors de l'assemblage du capot sur l'extrémité de l'enveloppe. Selon une caractéristique de l'invention, l'encoche de réception du tenon peut être confondue avec une cavité du noyau fixe. Après assemblage, des crantages additionnels sont réalisés sur l'extrémité de l'enveloppe pour l'immobilisation en rotation du capot isolant.According to a preferred embodiment, the main fixed core is provided with radial cavities in which notches of the casing fit during the crimping operation. The cover comprises at least one axial lug intended to engage in a notch in the fixed core when the cover is assembled on the end of the cover. According to a characteristic of the invention, the notch for receiving the post can be confused with a cavity in the fixed core. After assembly, additional notches are made on the end of the envelope for immobilization in rotation of the insulating cover.
Description sommaire des dessinsBrief description of the drawings
D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre d'un mode de réalisation de l'invention donné à titre d'exemple non limitatif, et représenté aux dessins annexés, dans lesquels:Other advantages and characteristics will emerge more clearly from the description which follows of an embodiment of the invention given by way of nonlimiting example, and represented in the appended drawings, in which:
la figure 1 est une vue partielle du contacteur selon l'art antérieur, au niveau de la fixation de la cuve sur le noyau fixe ; la figure 2 montre une vue partielle du contacteur selon l'art antérieur, au niveau de la fixation de la cuve sur le capot isolant de raccordement ; la figure 3 représente une vue en coupe de la cuve du contacteur selon l'invention ; la figure 4 est une vue en perspective de la cuve de la figure 3 ; la figure 5 illustre une demi-vue en coupe du contacteur équipé de la cuve de la figure 3 ; la figure 6 est une vue en coupe axiale d'un démarreur de l'art antérieur.Figure 1 is a partial view of the contactor according to the prior art, at the level of the fixing of the tank on the fixed core; Figure 2 shows a partial view of the contactor according to the prior art, at the level of the fixing of the tank on the insulating connection cover; Figure 3 shows a sectional view of the contactor tank according to the invention; Figure 4 is a perspective view of the tank of Figure 3; FIG. 5 illustrates a half-section view of the contactor equipped with the tank of FIG. 3; Figure 6 is an axial sectional view of a starter of the prior art.
Description d'un mode de réalisation préférentiel.Description of a preferred embodiment.
A la figure 3 le noyau mobile 18 est en position de repos en sorte que l'entrefer axial entre le noyau fixe 10 et le noyau mobile 18 est maximum.In Figure 3 the movable core 18 is in the rest position so that the axial air gap between the fixed core 10 and the movable core 18 is maximum.
Sur les figures 3 à 5, la cuve 11 est réalisée en plusieurs éléments, comprenant une enveloppe 15 métallique en forme de cloche, une virole 16 interne cylindrique en acier doux, et une rondelle 17 en matériau magnétique faisant office de noyau fixe additionnel. L'enveloppe 15, de forme cylindrique, comporte un fond 115 troué centralement pour passage du noyau 18. Ce fond est d'orientation transversale par rapport à l'axe X X du contacteur CT et est configuré pour former centralement à sa périphérie interne une protubérance 116 axiale dirigée en direction opposée à la rondelle 17. La protubérance 116 est de forme annulaire. Avantageusement cette enveloppe 15 est obtenue de manière économique par emboutissage profond.In FIGS. 3 to 5, the tank 11 is produced in several elements, comprising a metal envelope 15 in the shape of a bell, an internal cylindrical ferrule 16 in mild steel, and a washer 17 in magnetic material acting as an additional fixed core. The casing 15, of cylindrical shape, has a bottom 115 which is perforated centrally for passage of the core 18. This bottom has a transverse orientation relative to the axis XX of the contactor CT and is configured to form a protuberance centrally at its internal periphery 116 axial directed in the direction opposite to the washer 17. The protrusion 116 is of annular shape. Advantageously, this envelope 15 is obtained economically by deep drawing.
L'axe X X constitue l'axe de la bobine 22, du noyau mobile 18 et du poussoir 101 destiné à être déplacé par le noyau mobile 18 via une rondelle interne 103 solidaire du noyau 18. On voit en 102 le ressort de pression de contact, en 24 le premier ressort de rappel, à savoir le ressort de coupure, en 121 le second ressort de rappel et en 5 le ressort dents contre dents. Tous ces ressorts sont ici des ressorts hélicoïdaux. On notera que la rondelle 103 du noyau mobile 18 ferme une cavité terminée par un fond ouvert centralement pour le passage de la tige 117 reliée par l'axe 118 au levier de commande non représenté. Le ressort dents contre dents 5 prend appui sur ce fond et sur une extrémité épaulée de la tige18.The axis XX constitutes the axis of the coil 22, of the movable core 18 and of the pusher 101 intended to be moved by the movable core 18 via an internal washer 103 secured to the core 18. We see at 102 the contact pressure spring , at 24 the first return spring, namely the cut-off spring, at 121 the second return spring and at 5 the teeth against teeth spring. All these springs are here helical springs. It will be noted that the washer 103 of the movable core 18 closes a cavity terminated by a bottom open centrally for the passage of the rod 117 connected by the axis 118 to the control lever not shown. The teeth against teeth spring 5 is supported on this bottom and on a stepped end of the rod 18.
Une coupelle 120 est fixée, ici par sertissage, sur le noyau mobile 18. Cette coupelle sert d'appui à l'une des extrémités du second ressort de rappel 121.A cup 120 is fixed, here by crimping, to the movable core 18. This cup serves to support one of the ends of the second return spring 121.
Suivant une caractéristique la protubérance 116 sert d'appui à l'autre extrémité du ressort 121 en sorte que l'enveloppe à une fonction supplémentaire.According to one characteristic, the protrusion 116 serves as a support for the other end of the spring 121 so that the envelope has an additional function.
La rondelle 17 est en appui contre le fond 115 de l'enveloppe 15, et comporte dans la partie centrale un orifice 19 circulaire autorisant le passage axial du noyau mobile 18. La protubérance centrale 116 du fond 115 présente également un orifice circulaire autorisant le passage axial du noyau 18.The washer 17 bears against the bottom 115 of the casing 15, and comprises in the central part a circular orifice 19 allowing the axial passage of the movable core 18. The central protrusion 116 of the bottom 115 also has a circular orifice allowing the passage axial of the core 18.
Pour assurer les deux fonctions, d'une part, de maintien stable de la viroleTo ensure the two functions, on the one hand, of stable maintenance of the shell
16 et de la rondelle 1 dans l'enveloppe 15, et d'autre part, de rigidification de la cuve 11 évitant toute déformation due au couple de rotation exercé sur le capot16 and of the washer 1 in the casing 15, and on the other hand, of stiffening of the tank 11 avoiding any deformation due to the torque exerted on the cover
14 lors du serrage des bornes de connexion 20, la paroi latérale cylindrique de l'enveloppe 15 subit un retreint local de manière à ménager une nervure 21 annulaire en regard de l'emplacement du noyau fixe 10. Le retreint est obtenu à titre d'exemple par une déformation de la matière entraînant une diminution du diamètre obtenue par roulage sur toute la circonférence externe de l'enveloppe 15.14 when tightening the connection terminals 20, the cylindrical side wall of the envelope 15 undergoes a local constriction so as to provide an annular rib 21 opposite the location of the fixed core 10. The constriction is obtained, for example, by a deformation of the material resulting in a reduction in the diameter obtained by rolling over the entire outer circumference of the envelope 15.
Le diamètre interne D1 de la nervure 21 est supérieur au diamètre interne de la virole 16, et inférieur au diamètre D3 de l'enveloppe 15. L'épaisseur H de la nervure 21 mesurée dans la direction axiale, est inférieure ou égale à l'épaisseur du noyau fixe 10. Ainsi qu'il ressort à l'évidence de la description et des dessins on monte d'abord la rondelle 17 dans l'enveloppe 15 au contact du fond 115, puis on enfile le virole dans l'enveloppe 15 et enfin on déforme la matière de l'enveloppe 15 au contact de l'extrémité libre de la virole 16 pour blocage axial de celle-ci et formation du retreint. On obtient ainsi une cuve 11 en trois parties 15, 16, 17 constituant un sous ensemble manipulable et transportable. Cette solution ne fait pas appel à des opérations de soudage.The internal diameter D1 of the rib 21 is greater than the internal diameter of the ferrule 16, and less than the diameter D3 of the envelope 15. The thickness H of the rib 21 measured in the axial direction, is less than or equal to the thickness of the fixed core 10. As is evident from the description and the drawings, the washer 17 is first mounted in the casing 15 in contact with the bottom 115, then the ferrule is threaded into the casing 15 and finally the material of the envelope 15 is deformed in contact with the free end of the ferrule 16 for axial locking thereof and formation of the constriction. A tank 11 is thus obtained in three parts 15, 16, 17 constituting a manipulable and transportable sub-assembly. This solution does not require welding operations.
La virole 16 est avantageusement en contact intime par sa périphérie externe avec la périphérie interne de l'enveloppe 15. Il en est de même en ce qui concerne la rondelle 17. Ces pièces 16, 17 sont avantageusement en acier doux ainsi que l'enveloppe 15. en sorte qu'elles sont électriquement conductrices et que le flux magnétique peut transiter par ces pièces lorsque la bobine 22 est alimentée électriquement. La rondelle 17 peut avoir l'épaisseur requise. Bien entendu l'enveloppe 15 peut subir un traitement de surface pour lui conférer un aspect esthétique. En variante l'enveloppe 15 est en matériau non magnétique, par exemple à base d'aluminium.The ferrule 16 is advantageously in intimate contact through its external periphery with the internal periphery of the casing 15. The same is true as regards the washer 17. These parts 16, 17 are advantageously made of mild steel as well as the casing 15. so that they are electrically conductive and that the magnetic flux can pass through these parts when the coil 22 is electrically supplied. The washer 17 can have the required thickness. Of course, the envelope 15 can undergo a surface treatment to give it an aesthetic appearance. As a variant, the envelope 15 is made of non-magnetic material, for example based on aluminum.
En variante l'enveloppe 15, la virole 16 et la rondelle 17 peuvent être de section carrée, rectangulaire, polygonale ou autre.As a variant, the casing 15, the ferrule 16 and the washer 17 may be of square, rectangular, polygonal or other section.
Le fond 115 protège la rondelle 17 qui est ainsi peut sensible à la corrosion. Il en est de même en ce qui concerne la virole 16. L'épaisseur de la rondelle 17 est supérieure à celle de la virole 16. Après on monte la bobine 22 présentant un support annulaire 220. à section en forme de UThe bottom 115 protects the washer 17 which is thus susceptible to corrosion. The same applies to the ferrule 16. The thickness of the washer 17 is greater than that of the ferrule 16. Then the coil 22 is mounted, having an annular support 220. with a U-shaped section.
La bobine 22, via son support 220 annulaire, et la rondelle 17 sont montées sur un tube support 23 formant coussinet pour le noyau 18 et prenant appui sur un rebord annulaire 99 de centrage et d'orientation axiale du noyau fixe 10. Ce rebord 99 est prolongé à l'une de ses extrémités par un flasque 100 d'orientation transversale d'orientation transversale par rapport à l'axe X X.The coil 22, via its annular support 220, and the washer 17 are mounted on a support tube 23 forming a cushion for the core 18 and bearing on an annular flange 99 for centering and axial orientation of the fixed core 10. This flange 99 is extended at one of its ends by a flange 100 of transverse orientation transverse orientation with respect to the axis X X.
Ce flasque forme un épaulement d'appui et donc une butée axiale pour le support 220 et pour le tube 23. Le support 23 traverse l'orifice 19 de l'enveloppe 15 et de la protubéranceThis flange forms a support shoulder and therefore an axial stop for the support 220 and for the tube 23. The support 23 passes through the orifice 19 of the casing 15 and of the protuberance
116. Un premier ressort 24 de rappel sollicite le contact mobile 25 en pont contre le noyau fixe 10, en ménageant un intervalle axial avec les contacts fixes 26, dont un seul est visible sur la figure 5.116. A first return spring 24 biases the movable contact 25 in a bridge against the fixed core 10, providing an axial gap with the fixed contacts 26, only one of which is visible in FIG. 5.
Le flasque 100 est ici de forme cylindrique. Sa périphérie externe vient en contact intime avec la périphérie interne de la nervure 21 , qui sert ainsi de centreur au flasque 100 et donc au noyau fixe 10. La nervure 21 permet donc également de diminuer la hauteur du flasque 100 et donc la quantité de matière du noyau fixe, qui ainsi est plus économique.The flange 100 is here of cylindrical shape. Its external periphery comes into intimate contact with the internal periphery of the rib 21, which thus serves as a centering device for the flange 100 and therefore the fixed core 10. The rib 21 therefore also makes it possible to reduce the height of the flange 100 and therefore the quantity of material of the fixed core, which is thus more economical.
Avantageusement la périphérie interne de la nervure 21 , et donc du retreint, comporte une portion cylindrique , comme visible à la figure 3, servant de centreur au flasque 100. Cette portion est de diamètre interne D1 précité. Deux flancs inclinés s'étendent de part et d'autre de cette portion de centrage pour délimiter avec celle-ci la nervure 21. L'un de ces flancs incliné, le flanc 210 adjacent à l'extrémité libre de la virole 16, permet de serrer cette virole afin qu'elle vienne en appui sur la rondelle 17, elle-même en appui sur le fond 115. Ce flanc incliné 210 est donc un flanc de serrage. Bien entendu en variante la rainure a une autre forme par exemple globalement un forme en V à pointe arrondie de section analogue à celle des crantages 12 a de la figure 2.Advantageously, the internal periphery of the rib 21, and therefore of the constriction, comprises a cylindrical portion, as visible in FIG. 3, serving as a centering device for the flange 100. This portion has the abovementioned internal diameter D1. Two inclined flanks extend on either side of this centering portion to delimit therewith the rib 21. One of these inclined flanks, the flank 210 adjacent to the free end of the ferrule 16, allows to tighten this ferrule so that it comes to bear on the washer 17, which itself bears on the bottom 115. This inclined flank 210 is therefore a clamping flank. Of course as a variant, the groove has another shape, for example overall a V shape with a rounded tip of section similar to that of the notches 12 a of FIG. 2.
La périphérie externe du noyau fixe 10, à savoir la périphérie externe du flasque 100, comprend ici avantageusement des cavités 13 autorisant un double effet de blocage de la cuve 11 et du capot 14 sur le noyau fixe 10. Plusieurs déformations locales de l'enveloppe 15 peuvent être pratiquées de l'extérieur sur le diamètre réduit de la nervure 21 interne, de manière à repousser localement le métal dans les cavités 13 du flasque 100 du noyau fixe 10 pour bloquer celui-ci en rotation. Les déformations locales sont de préférence de forme trapézoïdales. On réalise ainsi un sertissage de l'enveloppe sur le noyau fixe.The outer periphery of the fixed core 10, namely the outer periphery of the flange 100, here advantageously comprises cavities 13 allowing a double locking effect of the tank 11 and the cover 14 on the fixed core 10. Several local deformations of the casing 15 can be made from the outside on the reduced diameter of the internal rib 21, so as to locally repel the metal in the cavities 13 of the flange 100 of the fixed core 10 to block the latter in rotation. The local deformations are preferably trapezoidal in shape. This creates a crimping of the envelope on the fixed core.
L'embase du capot 14 est dotée de tenons 27 destinés à s'engager axialement dans des encoches du noyau fixe 10. Sur la figure 5, les encoches sont confondues avec les cavités 13 recevant le métal refoulé lors du sertissage de l'enveloppe 15. Après l'assemblage final du contacteur CT, on réalise des déformations locales de l'extrémité de l'enveloppe 15 au niveau du capot 14, de manière à créer des crantages 12a assurant l'immobilisation en rotation du capot 14. Ces crantages 12a sont avantageusement reçus dans des cavités du capot comme à la figure 2. Ce capot, par l'intermédiaire de son embase exerce une action de serrage sur le flasque 100 du noyau fixe 10, sachant que le capot est incliné au niveau des cavités recevant îles crantages 12a en sorte que ces crantages exercent une force axiale sur le capot.. Les pièces 17,16, 100 et 14 sont donc serrées entre le fond 115 et les crantages 12 a. Avantageusement on repousse le métal de l'enveloppe 15 dans les cavités 13 après fixation du capot. Bien entendu on peut également réaliser cette opération avant fixation du capot, le rabattement de matière au niveau de crantages étant réalisé à la presse.The base of the cover 14 is provided with tenons 27 intended to engage axially in the notches of the fixed core 10. In FIG. 5, the notches coincide with the cavities 13 receiving the metal pushed back during the crimping of the casing 15 After the final assembly of the CT contactor, local deformations of the end of the casing 15 are carried out at the level of the cover 14, so as to create notches 12a ensuring the immobilization in rotation of the cover 14. These notches 12a are advantageously received in cavities of the cover as in FIG. 2. This cover, by means of its base exerts a clamping action on the flange 100 of the fixed core 10, knowing that the cover is inclined at the level of the cavities receiving î the notches 12a so that these notches exert an axial force on the cover. The parts 17, 16, 100 and 14 are therefore clamped between the bottom 115 and the notches 12 a. Advantageously, the metal of the envelope 15 is pushed back into the cavities 13 after fixing the cover. Of course, this operation can also be carried out before fixing the cover, the material being folded down at the notches being produced with the press.
Ainsi qu'on l'aura compris les déformations locales pénétrant dans les cavités et les tenons 27 permettent d'indexer angulairement les différentes pièces le unes par rapport aux autres.As will have been understood, the local deformations entering the cavities and the pins 27 make it possible to angularly index the different parts with respect to each other.
Grâce à l'invention l'enveloppe 15 peut être de faible épaisseur du fait de la présence de la nervure de rigidification 21. Thanks to the invention, the casing 15 can be thin because of the presence of the stiffening rib 21.

Claims

!E EMDIC TI©[^! E EMDIC TI © [ ^
Contacteur électromagnétique pour un démarreur à moteur électrique, ledit contacteur (CT) comprenant :Electromagnetic contactor for an electric motor starter, said contactor (CT) comprising:
des bornes de connexion destinées à être raccordées à une batterie et au moteur électrique (M) un noyau mobile (18) un noyau fixe principal (10) un entrefer axial ménagé entre le noyau mobile (18) et le noyau fixe (10) une bobine (22) tubulaire pour engendrer lors de son excitation un flux magnétique dans l'entrefer axial ménagé entre le noyau mobile (18) et le noyau fixe principal (10), un circuit magnétique doté d'une cuve (11) agencée en culasse magnétique fixée au noyau fixe (10), un capot (14) isolant renfermant les contacts (25, 26) du circuit électrique de puissance et portant les bornes (20) de connexion destinées à être raccordées à la batterie et au moteur électrique, ladite cuve (11) étant composée d'une enveloppe (15) métallique en forme de cloche, d'une virole (16) interne en matériau magnétique entourant la bobine (22), et d'une rondelle (17) jouant le rôle de noyau fixe additionnel traversé par le noyau mobile (18) et agencée à l'opposé du noyau fixe principal (10), caractérisé en ce que l'enveloppe (15) métallique de la cuve (11) comporte une nervure (21) annulaire s'étendant en continu en regard de la périphérie cylindrique du noyau fixe (10) principal, ladite nervure ayant un diamètre interne (D1) respectivement supérieur à celui de la virole (16) et inférieur à celui de l'enveloppe (15), de manière à assurer le calage des différentes pièces de la cuve (11 ). connection terminals intended to be connected to a battery and to the electric motor (M) a mobile core (18) a main fixed core (10) an axial air gap formed between the mobile core (18) and the fixed core (10) a tubular coil (22) for generating, during its excitation, a magnetic flux in the axial air gap formed between the movable core (18) and the main fixed core (10), a magnetic circuit provided with a tank (11) arranged in a cylinder head magnetic fixed to the fixed core (10), an insulating cover (14) containing the contacts (25, 26) of the electric power circuit and carrying the connection terminals (20) intended to be connected to the battery and to the electric motor, said tank (11) being composed of a bell-shaped metal casing (15), an internal ferrule (16) made of magnetic material surrounding the coil (22), and a washer (17) acting as a core additional fixed crossed by the movable core (18) and arranged opposite d u main fixed core (10), characterized in that the metal casing (15) of the tank (11) comprises an annular rib (21) extending continuously opposite the cylindrical periphery of the main fixed core (10) , said rib having an internal diameter (D1) respectively greater than that of the shell (16) and less than that of the envelope (15), so as to ensure the timing of the different parts of the tank (11).
2. Contacteur selon la revendication 1 , caractérisé en ce que la nervure (21) assure à la fois le calage des différentes pièces de la cuve (11), et le sertissage de l'enveloppe (15) sur le noyau fixe (10) suite à des déformations locales exercées sur le diamètre réduit du retreint délimitant la nervure (21).2. Contactor according to claim 1, characterized in that the rib (21) ensures both the setting of the different parts of the tank (11), and the crimping of the casing (15) on the fixed core (10) following local deformations exerted on the reduced diameter of the constriction delimiting the rib (21).
3. Contacteur selon la revendication 2, caractérisé en ce que le noyau fixe (10) principal est pourvu de cavités (13) radiales dans lesquelles s'encastrent des crantages (12) issus du sertissage.3. Contactor according to claim 2, characterized in that the main fixed core (10) is provided with radial cavities (13) in which notches (12) from the crimping fit.
4. Contacteur selon la revendication 2, caractérisé en ce que le capot (14) comporte au moins un tenon (27) axial destiné à s'engager dans une encoche du noyau fixe (10) lors de l'assemblage du capot sur l'extrémité de l'enveloppe (15).4. Contactor according to claim 2, characterized in that the cover (14) comprises at least one pin (27) axial intended to engage in a notch of the fixed core (10) during the assembly of the cover on the end of the envelope (15).
5. Contacteur selon la revendication 4, caractérisé en ce que l'encoche de réception du tenon (27) est confondue avec une cavité (13) du noyau fixe (10).5. Contactor according to claim 4, characterized in that the notch for receiving the post (27) coincides with a cavity (13) of the fixed core (10).
6. Contacteur selon l'une des revendications précédentes, caractérisé en ce que des crantages (12a) sont réalisés après assemblage sur l'extrémité de l'enveloppe (15) pour l'immobilisation en rotation du capot (14). 6. Contactor according to one of the preceding claims, characterized in that notches (12a) are produced after assembly on the end of the casing (15) for immobilization in rotation of the cover (14).
EP04742368.6A 2003-03-28 2004-03-26 Electromagnetic contactor for controlling an electric starter Expired - Lifetime EP1613858B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0303876A FR2854665B1 (en) 2003-03-28 2003-03-28 ELECTROMAGNETIC CONTACTOR FOR CONTROLLING AN ELECTRIC STARTER
PCT/FR2004/000764 WO2004088126A2 (en) 2003-03-28 2004-03-26 Electromagnetic contactor for controlling an electric starter

Publications (2)

Publication Number Publication Date
EP1613858A2 true EP1613858A2 (en) 2006-01-11
EP1613858B1 EP1613858B1 (en) 2015-07-29

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ID=33104299

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EP04742368.6A Expired - Lifetime EP1613858B1 (en) 2003-03-28 2004-03-26 Electromagnetic contactor for controlling an electric starter

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US (1) US7375606B2 (en)
EP (1) EP1613858B1 (en)
JP (1) JP4516065B2 (en)
KR (1) KR101074729B1 (en)
CN (1) CN1742156B (en)
BR (1) BRPI0406437B1 (en)
FR (1) FR2854665B1 (en)
MX (1) MXPA05010344A (en)
WO (1) WO2004088126A2 (en)

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WO2015075400A1 (en) 2013-11-21 2015-05-28 Valeo Equipements Electriques Moteur Starter and starter drive assembly for a combustion engine
DE102018009455A1 (en) 2017-12-11 2019-06-13 Valeo Equipements Electriques Moteur Electric motor for a starter of an internal combustion engine and starter, which is equipped with such an electric motor

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FR2885983B1 (en) * 2005-05-19 2015-07-24 Valeo Equip Electr Moteur SEALING BY DEFORMATION OF MATERIAL
EP2080898B1 (en) * 2008-01-18 2020-03-11 Denso Corporation Starter with compact structure
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Publication number Priority date Publication date Assignee Title
WO2015075400A1 (en) 2013-11-21 2015-05-28 Valeo Equipements Electriques Moteur Starter and starter drive assembly for a combustion engine
DE102018009455A1 (en) 2017-12-11 2019-06-13 Valeo Equipements Electriques Moteur Electric motor for a starter of an internal combustion engine and starter, which is equipped with such an electric motor

Also Published As

Publication number Publication date
CN1742156B (en) 2011-04-13
EP1613858B1 (en) 2015-07-29
JP4516065B2 (en) 2010-08-04
KR20050107755A (en) 2005-11-15
MXPA05010344A (en) 2005-11-17
WO2004088126A3 (en) 2004-11-18
FR2854665B1 (en) 2007-02-23
US20070171583A1 (en) 2007-07-26
BRPI0406437B1 (en) 2013-01-22
WO2004088126A2 (en) 2004-10-14
CN1742156A (en) 2006-03-01
US7375606B2 (en) 2008-05-20
JP2006524888A (en) 2006-11-02
KR101074729B1 (en) 2011-10-18
BRPI0406437A (en) 2005-10-04
FR2854665A1 (en) 2004-11-12

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