EP3372821A1 - Kontaktschalter für anlasser - Google Patents

Kontaktschalter für anlasser Download PDF

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Publication number
EP3372821A1
EP3372821A1 EP18160124.6A EP18160124A EP3372821A1 EP 3372821 A1 EP3372821 A1 EP 3372821A1 EP 18160124 A EP18160124 A EP 18160124A EP 3372821 A1 EP3372821 A1 EP 3372821A1
Authority
EP
European Patent Office
Prior art keywords
wafer
core
contact
terminal
contactor
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.)
Withdrawn
Application number
EP18160124.6A
Other languages
English (en)
French (fr)
Inventor
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
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 EP3372821A1 publication Critical patent/EP3372821A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • H01H50/42—Auxiliary magnetic circuits, e.g. for maintaining armature in, or returning armature to, position of rest, for damping or accelerating movement
    • 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
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/087—Details of the switching means in starting circuits, e.g. relays or electronic switches
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/541—Auxiliary contact devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/60—Contact arrangements moving contact being rigidly combined with movable part of magnetic circuit
    • 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
    • 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
    • F02N15/006—Assembling or mounting of starting devices

Definitions

  • the invention relates to the technical field of starters for a motor vehicle engine comprising a heat engine. More particularly, the technical field of the invention relates to contactors for activating or not an electric motor of the starter.
  • some contactors comprise a switching element controlled, for example by a computer, to decide on the starting of the electric motor of the starter.
  • a problem arises from the passage of the operation of the electric motor and the engine and their coordination in their operation.
  • This switching element dissociates the advance of the pinion in the ring with the power supply of the electric motor.
  • the switching element therefore advantageously makes it possible to supply the electric motor once the pinion is engaged in the ring gear. This function makes it possible in particular to avoid milling the pinion with the crown when the two elements are rotating without being engaged.
  • FIG. 1 A first solution of the state of the art is illustrated in the figure 1 .
  • the figure 1 represents a state-of-the-art switching element MC having a movable core P2 of ferromagnetic material mounted with a coil L2 to prevent displacement of said core P2 when the coil L2 is activated.
  • the movable core P2 is also mounted with a U-shaped electrical conductor element C2 for the passage of the charges between the wafer C1 and a terminal D of a terminal B2 or vice versa.
  • the wafer C1 is a movable contact which makes it possible to connect the terminal B2 to another terminal B1, in which the terminal B2 or the terminal B1 is intended to be connected to a positive terminal of the vehicle battery and the other terminal to positive brushes of the electric motor.
  • the wafer C1 is movable between a rest position in which it is electrically isolated from at least one of the terminals and in an active position where it connects the two terminals eclectically.
  • the plate is moved by means of a rod shown itself moved by a movable main core of the not shown contactor which moves from a rest position remote from a not shown fixed core to an active position in contact with the fixed core. Moving the movable core to the active position occurs through a so-called coil call coil that when energized produces a magnetic field attracting the movable core to the fixed core.
  • the movable core further moves the pinion towards the crown as it moves from the rest position to the active position.
  • the mobile core P2 is a part which is confined in a small space and which must be mounted with many elements such as in particular a coil , a conductive element C2 and a return spring for disengaging the movable core from the terminal B2.
  • the conductive part C2 forms a U is not always optimized to achieve the conduction function because it is bulky.
  • the mobile core is thus assembled with other parts in order to separate the ferromagnetic and conductive functions of the conductor.
  • the invention makes it possible to reduce the abovementioned disadvantages.
  • the invention provides a solution of a contactor comprising a movable core bi materials for performing both the ferromagnetic function to be driven under the effect of a magnet and a conductive function through an arrangement between a conductive material and a ferromagnetic material carrying electric charges from one end to the other when making contact with the terminal and the wafer.
  • the bi-material mobile core comprises two contact pads. This allows good electrical contact on the one hand with the wafer and on the other hand with the contact terminal. Finally, another advantage is to reduce the formation of arcs at both ends of the mobile core. According to one embodiment, the bi-material mobile core is symmetrical. This makes it possible to have a kernel mount of any sense and thus simplify the assembly line.
  • the contactor comprises a return spring applying a restoring force on the moving mobile bi-material core to the initial position.
  • a spring is mounted under stress between an element secured to the cover in the different states of the starter and the movable core.
  • state of the starter is meant the different position of the contact plate.
  • the return spring and bearing against an insulating element integral with the movable core bi materials This makes it possible not to dissipate electric charges in the return spring.
  • the wafer in the first position exerts a holding force retaining the mobile core bi moving material in initial position. This makes it possible to dispense with the bi-material core return spring in the initial position (away from the terminal).
  • the contactor comprises a control rod, the contact plate being mounted on the control rod abutting against a stop fixed to the control rod in the first position and a preload spring mounted around the control rod exerting a force on the plate in the direction of the stop of the control rod.
  • the bi-material mobile core further comprises, at the near end of the wafer, a fastening element driving the bi-material core moving from the contact position to the initial position when the wafer is moving towards the first position.
  • the movable core may comprise an element on the other side of the wafer so as to form a retention stop.
  • the wafer may then include a hole in which the attachment member extends.
  • the locking element may for example be non-conductive, for example plastic, to avoid making electrical contact with the wafer when the latter moves in the opposite direction to the contact terminal.
  • the movement of the wafer to break the electrical contact with the bi-material moving core then makes it possible to instantly drive the mobile core to an initial position remote from the terminal while maintaining it at an electric distance from the conductive part of the bi-material mobile core. .
  • the return spring can be omitted since the fastener element exerts the force allowing the core to disengage from the contact terminal to the initial position when the coil surrounding the bi-material moving core is not powered and the pad moves to the initial position.
  • the wafer drives the mobile bi-material moving core to the contact position so that this position is reached when the plate is in second position.
  • the coil surrounding the bi-material moving core produces, when electrically energized, a magnetic field on the bi-material moving core holding it in a position preventing the contact plate from pushing the movable core to the contact position.
  • the contactor comprises a tank partially covering the coil around the movable core bi materials to buckle the magnetic field generated by the coil, the coil maintaining the bi-material moving core in its initial position when the coil is electrically powered.
  • At least one chip is mounted tightly in a recessed portion of the end of the ferromagnetic portion of the bi-material moving core.
  • a contactor 1 of the invention is generally integrated in a starter for a heat engine. Such a contactor 1 makes it possible in particular to facilitate the transitions of operation between the starting of the electric motor of the starter and the operation of a heat engine of the starter.
  • the electric motor urges a starter gear in different position of the pinion to drive the engine.
  • the pinion is driven by the electric motor to engage the ring which can be in motion or not during the gearing.
  • the sequence of actuation of the mechanical parts to achieve the pinion gear must be very precise vis-à-vis the others to avoid damage to the parts interacting with each other.
  • Such a starter may comprise a reducer coupled to the rotor of the electric motor driven by the contactor 1 of the invention.
  • the contactor 1 controls firstly the axial displacement of a launcher comprising the pinion via a fork, not shown, and secondly the power supply of the electric motor by the displacement of a wafer 30 also called contact plate which comes to make the connection between two electrical terminals, one of which is connected to the battery and the other to the positive brush of the electric motor.
  • the launcher and the electric motor of the starter therefore form drive means for the engine.
  • the contactor 1 therefore forms an element that can drive the wafer and the fork to activate the drive of the launcher, which is achieved by a break in the electrical continuity between a mobile core 2 of a locking device, the wafer 30 and a Terminal 20.
  • the contactor 1 can establish an electrical continuity between the wafer 30, the movable core 2 and the terminal 20 to activate the electric motor.
  • One of the objectives of such a switch and therefore the starter is for example to ensure that the pinion is well geared in the ring before ignition of the engine.
  • the figure 2 represents a contactor 1 of the invention.
  • the contactor 1 comprises at least one locking device comprising the movable bi-material moving core 2 of the invention and a coil 9.
  • the contactor further comprises the conductive mobile plate 30 and the conductive contact terminal 20.
  • the mobile core bi material 2 is movable in translation along the axis B-B '.
  • the coil surrounding the dual-material mobile core is controlled by a calculator, called ECU.
  • the starter comprises electronics for controlling the coil, the electronics may be internal to the contactor and therefore belong to the contactor.
  • the mobile core 2 has the function of managing when the electric motor is in operation. It makes it possible to separate the progress of the pinion from the power supply of the electric motor. This function can be used to ensure that the pinion has entered the crown before feeding the electric motor. This function makes it possible to avoid in particular the milling of the pinion with the crown.
  • the ECU or the electronics with a sensor controls the state of the pinion before starting the electric motor.
  • a timer is implemented to perform this control function.
  • the wafer also said movable plate or contact plate 30 extends along its length in initial position along an axis perpendicular to the axis B-B.
  • a control rod 50 causes the displacement of the wafer 30 under the effect of a movement of a main movable core not shown contactor. It is this main mobile core that moves the range
  • the wafer 30 therefore moves from an initial position in which the starter is not powered to a contact position for powering the electric motor.
  • the contact plate makes contact with another terminal 40 connected to the positive terminal of the drums.
  • the terminal 40 is connected to the positive brush of the electric motor, in this case the terminal 20 is connected to the positive terminal of the battery.
  • relays or other electrical elements can connect terminal 40 or 20 according to the example to the positive terminal.
  • the wafer is in an electrically conductive material, for example copper or silver.
  • the contact terminal 20 is intended to transmit electrical control to the electric motor, when an electrical continuity between the movable core 2 and the wafer 30 is established.
  • the contact terminal 20 is a single material.
  • the contact terminal 20 comprises a conductive pad arranged at the end of the contact terminal 20 which is intended to be in contact with the bi-material core.
  • the figure 2 represents an exemplary embodiment in which a wafer 21 of the contact terminal 20 is intended to be in contact with the wafer 3 'of the bi-material core 2.
  • the terminal 20 can be electrically connected to the positive wiper of the electric motor directly if the inductor includes magnets or indirectly for example if the inductor comprises coils. By directly is meant by one or more conductors whose sole role is to transmit the electric charges (braid, electrical bridge, electrical pad etc.).
  • a fuse may also for example be electrically mounted between the brushes and the terminal 20.
  • the figure 2 represents in a first view the bi-material core of the invention arranged between the wafer 30 and the terminal 20.
  • the movable core b material 2 is a movable core 2 evolving between two positions: an initial position and a contact position.
  • the movable core bi material 2 comprises a first face 23 in which a conductive material 3 which has a contact surface 32 and in this case points of contact.
  • This first contact surface 32 is intended to be in contact with the wafer 30.
  • the movable core b material 2 comprises a second face 23 'of a conductive material 3' having contact points 32 or at least one contact surface 32. This second face 23 'is in contact with the terminal 20 when the mobile core 2 is in the contact position. It is recalled that the displacements in translation are along the axis B-B '.
  • a prestressing spring 51 makes it possible to ensure a pressure between the elements put in contact.
  • the prestressing spring 51 maintains a slight pressure on the wafer 30.
  • a spring 52 makes it possible to determine a progressive end of stroke of the control rod 50 under the effect of the main movable core.
  • the biasing spring is mounted around the control rod and exerts a force on the wafer in the direction of a stop not shown of the control rod.
  • the contact plate is mounted on the control rod pressed by the preload spring against the stop fixed to the control rod in the initial position. When the wafer comes into contact with the terminal 40, the preloading spring makes it possible to ensure a contact pressure between the wafer and this terminal.
  • the preloading spring is used to press the contact plate against the contact surface 32 of the movable core 2 which comprises its contact surface 23 'pressed against the terminal 20.
  • This ensures a contact pressure between the wafer and the movable core bi materials and another terminal and the movable core on the terminal 20 when the wafer is in the connected position.
  • This contact pressure allows good electrical contact between the various elements.
  • the prestressing spring 51 ensures a maintained contact between the 3 parts.
  • a return spring 6 makes it possible to maintain a slight stress on the bi-material movable element 2 in order to push the movable core 2 from the contact position to the initial position when the plate 30 no longer exerts displacement force on the core.
  • movable bi material 2. This ensures that the mobile core 2 is in the initial position when the starter is no longer electrically powered.
  • the mobile core 2 is potentially subject to various constraints exerted on it.
  • a first constraint comes from the wafer 30 when the latter is driven by the control rod 50.
  • the wafer 30 then exerts a force on the first conductive surface 23 of the movable core 2 driving the latter in translation.
  • a second constraint comes from the return spring 6 exerting a restoring force on the movable core 2 when the latter is moved in contact with the terminal 20.
  • a third constraint can be generated from a magnetic control by the presence of a coil 9 surrounding the mobile core 2 and causing an electromagnetic force on the movable core 2 which comprises a body 5 composed in particular of a ferromagnetic material.
  • the contactor 1 comprises a call coil and a unrepresented holding coil.
  • the call coil with the holding coil is used to engage the movement of the main movable core not shown which moves the control rod and therefore the contact plate.
  • the holding coil keeps the main movable core in a final position in contact with a fixed core not shown.
  • This decomposition of the magnetic forces applied during the different phases of the movements of a main mobile core makes it possible to optimize the energy of the system.
  • the movable core makes it possible to move a fork as well as the wafer towards the second position and thus the movable core bi material towards the position of contact.
  • the resultant of the magnetic field of the holding coil is smaller than the resultant of the magnetic field of the call coil. The use of two coils therefore allows an adaptation of the energy required for the function to be performed.
  • the contactor comprises the coil 9 of the locking device, it then forms a holding electromagnet bi-material mobile core in the initial position.
  • the holding coil 9 thus makes it possible to keep the mobile core 2 in an initial position POSi.
  • the locking device prevents an electrical contact between the wafer and the terminal 20 connected in this embodiment to the electric motor.
  • the contactor comprises another coil surrounding the coil 9 and in that its supply is opposite to the first coil so as to cancel the magnetic field of the coil 9 to no longer hold in the initial POSI position the mobile core bi material.
  • This additional coil can be used instead of another starter having a different control law that involves.
  • the locking device comprises a support that can be made of plastic 101 making it possible to form a support for the coil 9 that surrounds the ferromagnetic body of the mobile core 2.
  • the support 101 makes it possible to prevent the moving core and the coil of contact from being brought into contact with each other. so as to prevent a charge transfer taking place between the two parts and to guide the movable core bi material 2.
  • the coil 9 is powered by an input 13 to activate or deactivate the magnetic field according to the control of the ECU calculator or electronics .
  • the coil 9 is integrated in a tank 7 which makes it possible to close the magnetic field with the mobile core 2.
  • the tank 7 comprises a cavity for the passage of the necessary connections in particular to supply the coil.
  • the locking device may further comprise a plastic overmolding body 11 for holding the tank, the support, the coil 9 around the movable core bi material.
  • the tank partially surrounds the coil because it comprises an opening, for example about 30 °. This opening makes it possible to pass the entry and exit of the reel.
  • the cut represented for example on the figure 2 was made in the opening of the tank 7.
  • the opening is located on the side of the feed wire 13 relative to the axis BB '.
  • the release spring 6 can bear against an insulating part, for example made of plastic, such as a washer, itself bearing against one end of the movable core 2.
  • the displacements of the mobile core 2 are made possible in translation, they are in this case limited in all the other directions so as to make the mobile core 2 functional to establish or not an electrical contact with the wafer 30 and the terminal 20.
  • the other degrees of freedom of the mobile core 2 are limited in this case.
  • the locking device is mounted in the hood.
  • the blocking device comprises in this case the over-molded part overmolded on the coil 9 and the support piece 101, the ferromagnetic tank 7 so as to form a body integral with the locking device.
  • the blocking device comprises a blocking stopper 110 formed by the ferromagnetic tank 7 of an element limiting the displacement of the movable core 2.
  • the figure 3 represents the mobile core bi material 2 in an initial position POS i, that is to say in a position in which it is neither in contact with the wafer 30 nor in contact with the terminal 20.
  • the initial position POS i of movable core 2 corresponds to a position in which a distance between the movable core 2 and the contact terminal 20 ensures an electrical discontinuity between the two parts.
  • the wafer 30 is in a first POS1 position.
  • the first POS1 position of the wafer 30 corresponds to a position in which a distance between the wafer 30 and the movable core 2 ensures an electrical discontinuity between the two parts.
  • the figure 4 represents the electric board 30 in a second POS2 position reached under the effect of a longitudinal displacement MVT_50 of the control rod 50 along its main axis A-A '.
  • the control rod 50 moves from a POS0 position to a POS0 'position by performing longitudinal displacement MVT_50.
  • This displacement makes it possible to cause a movement MVT_30 of the wafer 30 from a first position POS1 to a second position POS2.
  • the coil 9 being fed applies a ferromagnetic force to the movable core 2 and blocks the contact plate 30.
  • the prestressing spring 51 is compressed due to the immobilization of the movable core 2 which blocks one side of the wafer 30.
  • the wafer In this case pivots and its other end comprises a portion of its contact surface with the other terminal 40.
  • the wafer does not pivot and therefore its other end remains remote from the other terminal 40.
  • figure 4 represents a wafer 30 slightly oriented relative to the normal of the axis AA 'when the latter comes into contact with the movable core 2.
  • the figure 5 represents the electric board 30 in the second position POS2 after the movable core 2 has moved to be in contact with one end of the electrical terminal 20.
  • the contact position of the movable core with the mobile terminal 20 is noted POSc.
  • the second POS2 position of the wafer 30 therefore corresponds to a POSc contact position of the mobile core 2 with the contact terminal 20 and with the wafer 30.
  • the mobile core 2 maintained by the wafer 30 ensures an electrical contact between the terminal 20 and the wafer 30.
  • the electrical contact is a continuous contact between the wafer 30 and the terminal 20, where the mobile core 2 is a conductive element passing electrical charges between the wafer 30 and the terminal of contact 20.
  • a release spring 6 makes it possible to exert a restoring force on the movable core 2 in order to release the latter from the POSc contact position when the electrical contact between the parts has to be interrupted, which occurs when the coil or coils Call and hold surrounding the main fixed core of the contactor is no longer powered.
  • the wafer 30 disengages under the effect of a movement of the control rod 50 in the other direction than that of the contact terminal 20.
  • the release of the wafer 30 allows the spring to release 6 to exert a force on the movable core 2 so as to move it to its initial position POSI ..
  • the movable core 2 of the locking device of the invention comprises at each of its ends a contact pad 3, 3 'at each of its ends 23, 23'.
  • at least one contact pad 3, 3 ' is made of a conductive material such as copper or silver alloys, for example, according to one embodiment, the two contact pads are formed in the same material.
  • Conductive materials such as copper or silver having a low resistivity can establish power contacts of the order of 1000A. These materials have the advantage of promoting the cutting of these arcs as well as to limit the wear of these contacts due to electric arcs. These arcs are generally present at the junction of the elements in contact, such as the contact between the wafer 30 and the movable core 2 or the contact terminal 20 and the movable core 2. The electric arcs can be formed, for example, when two pieces in contact have a game between them. Thus, the driving force of the wafer 30 due to the prestressing spring 51 cooperate to eliminate a large part of the clearance between the parts brought into contact.
  • the low resistivity of the conductive pellets 3, 3 limit the risks of welding that can occur when the resistance of the conductive material is too high and that same material carries a high current.
  • the prestressing spring 51 makes it possible to maintain good contact between the parts to ensure electrical continuity between the wafer 30, the movable core 2 and the contact terminal 20.
  • the return spring 6 must therefore be lower in force to the spring prestressing device 51 to maintain a pressure force between the parts in contact.
  • This pressure force is configured to take into account, if necessary, a backlash of play between the parts in contact and ensure a pressure between it to have a good electrical contact.
  • a mono-material core should impose greater constraints to maintain the electrical contacts due to the difference in resistivity between steel and copper. Indeed, the steel would not allow to establish a good conductive contact with the surrounding parts of the movable core 2 that are the wafer 30 and the terminal 20.
  • the contactor 1 of the invention therefore makes it possible to reduce the bulk of the mobile core 2 by virtue of the fact that it is bi-materials.
  • the presence of conductive pads having a very low resistivity at the end of the movable core 2 avoids the formation of welding effects and limits the wear of the contact pieces.
  • the pellets 3, 3 ' make it possible to establish a good contact on the one hand with the plate 30 and on the other hand with the contact terminal 20.
  • the contact pads 3, 3 ' are fixed at each end in the body 5 of the movable core 2.
  • the body 5 is composed of a ferromagnetic material such as steel, or an alloy based on iron, or of other materials having magnetic properties and electrical conductor for subjecting the movable core 2 to a force resulting from a magnetic field caused by a coil 9 partially surrounding the movable core 2.
  • the good electrical conductivity promotes a passage of charges that is facilitated between these parts.
  • the pellets 3, 3 ' can be attached to each end of the movable core 2 by means of a fastener, by welding or by stamping, stamping or crimping.
  • the body 5 comprises hollow hollow extremities having an internal groove for holding the pellets 3, 3 'integrated within them.
  • the hollow end cavities are designed so that the pellets 3, 3 'comprise a portion 35 of material holding each pellet 3, 3' in their cavity.
  • a circumferential inclination forming a retaining rim of the cavity makes it possible to retain the pellet 3, 3 'in the cavity.
  • the figure 2 represents such edges of the portion 35 of the pellet.
  • the chip 3, 3 ' has a circumferential edge 31 making it possible to offer an optimized electrical contact surface with the wafer 30 or the terminal 20.
  • the circumferential edge 31 has on the surface facing the body 5 at least one asperity 33 so as to reinforce the maintenance of the pellet 3, 3 'in the body 5.
  • the roughness 33 may comprise at least one tip or a circumferential groove adapted to cooperate with a mirror asperity of the body 5.
  • the asperities form concentric ridges on the surface of the pellets 3, 3 '.
  • the wafer 3, 3 ' has a flat surface to form the electrical contact with the wafer 30 or the terminal 20 as the wafer 23'.
  • the pellet 3, 3 ' has asperities on its surface forming, for example, pins or tips or conductive lines to ensure contact at certain points of the pellet 3, 3' with the terminal 20 or the plate 30.
  • the distribution of roughness on the surface of the pellet 3, 3 ' is homogeneous.
  • asperities An advantage of the presence of asperities is to reduce the contact pressure between the parts. In addition, these asperities allow the ice created by the condensation of water at freezing temperatures to settle in the recesses so that the projections can be in contact with the wafer.
  • the body 5 has a general shape of revolution comprising cylindrical portions.
  • the ferromagnetic body 5 comprises a central conductive core joining the two pellets 3, 3 'to each other.
  • An advantage of the invention is to manufacture a low cost mobile core 2 having a compact solution for a starter.
  • the invention also offers a more ergonomic solution than the state of the art because the bi-material mobile core 2 incorporates from its design functions ferromagnetic and conductive in one piece.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Contacts (AREA)
  • Electromagnets (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
EP18160124.6A 2017-03-07 2018-03-06 Kontaktschalter für anlasser Withdrawn EP3372821A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1751825A FR3063831B1 (fr) 2017-03-07 2017-03-07 Contacteur pour demarreur

Publications (1)

Publication Number Publication Date
EP3372821A1 true EP3372821A1 (de) 2018-09-12

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EP18160124.6A Withdrawn EP3372821A1 (de) 2017-03-07 2018-03-06 Kontaktschalter für anlasser

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EP (1) EP3372821A1 (de)
FR (1) FR3063831B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114496660A (zh) * 2022-04-08 2022-05-13 江铃汽车股份有限公司 一种防粘连高压继电器

Citations (4)

* Cited by examiner, † Cited by third party
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DE817620C (de) * 1950-01-31 1951-10-18 Hans Buchele Fa Elektrischer Schalter fuer Einphasen-Motoren
EP0744761A2 (de) * 1995-05-26 1996-11-27 Nippondenso Co., Ltd. Magnetschalter für Anlasser
EP0790630A2 (de) * 1996-02-13 1997-08-20 Denso Corporation Magnetschalter für Anlasser mit elastisch verformbarem Kontakt
WO2013093371A1 (fr) * 2011-12-22 2013-06-27 Valeo Equipements Electriques Moteur Commutateur electromagnetique pour demarreur de moteur thermique comprenant au moins deux contacts mobile

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE817620C (de) * 1950-01-31 1951-10-18 Hans Buchele Fa Elektrischer Schalter fuer Einphasen-Motoren
EP0744761A2 (de) * 1995-05-26 1996-11-27 Nippondenso Co., Ltd. Magnetschalter für Anlasser
EP0790630A2 (de) * 1996-02-13 1997-08-20 Denso Corporation Magnetschalter für Anlasser mit elastisch verformbarem Kontakt
WO2013093371A1 (fr) * 2011-12-22 2013-06-27 Valeo Equipements Electriques Moteur Commutateur electromagnetique pour demarreur de moteur thermique comprenant au moins deux contacts mobile

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114496660A (zh) * 2022-04-08 2022-05-13 江铃汽车股份有限公司 一种防粘连高压继电器
CN114496660B (zh) * 2022-04-08 2022-07-08 江铃汽车股份有限公司 一种防粘连高压继电器

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