EP3140843B1 - Kontaktvorrichtung eines anlasserschütz - Google Patents

Kontaktvorrichtung eines anlasserschütz Download PDF

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Publication number
EP3140843B1
EP3140843B1 EP15725775.9A EP15725775A EP3140843B1 EP 3140843 B1 EP3140843 B1 EP 3140843B1 EP 15725775 A EP15725775 A EP 15725775A EP 3140843 B1 EP3140843 B1 EP 3140843B1
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EP
European Patent Office
Prior art keywords
contact
spring
rod
contactor
contact plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP15725775.9A
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English (en)
French (fr)
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EP3140843A1 (de
Inventor
Romain GUIGNOT
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Equipements Electriques Moteur SAS
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Valeo Equipements Electriques Moteur SAS
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Publication of EP3140843A1 publication Critical patent/EP3140843A1/de
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • 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

Definitions

  • the present invention relates to the field of starters for heat engines, in particular for motor vehicles, and more specifically to contactors for starters which supply power to the electric motor driving the starter pinion.
  • the contactors of the starters of the state of the art have two roles, on the one hand to move the starter supporting the pinion by means of a fork so as to allow the gear of the pinion to the crown of the heat engine to be started and on the other hand, supplying the electric motor of the starter making it possible to drive the pinion in rotation.
  • the contactors include a set of coils making it possible to move the movable part of a magnetic core, the movable part of the magnetic core causing both the displacement of the fork and the displacement of a contact device comprising a contact plate. contact intended to establish electrical contact between power supply terminals of the electric motor.
  • springs called the crushing spring and return spring are placed on either side of the plate so as to force the plate against the terminals when the coils are activated and move the plate towards the terminals and to facilitate the return of the plate to its initial position when the coils are no longer supplied
  • FR2957711 A1 discloses a starter contactor of the technical state according to the preamble of claim 1.
  • the presence of one or more rebounds of the wafer on the terminals may occur when the coils are energized. This (these) rebound (s) cause (s) a bad contact and disturb (s) the operation of the starter.
  • contact devices of the state of the art generally include a large number of parts, which results in complex assembly.
  • the aim of the invention is therefore to provide an inexpensive solution having a simple mounting of the contact device making it possible to reduce the appearance of rebounds when the coils are supplied and when the wafer is moved towards the terminals.
  • the contact device must be reliable to allow the various elements to be held in position even after a large number of starts.
  • the contact rod is made of an electrically insulating material.
  • the contact rod is made of a polymer material.
  • the force of the return spring on the contact rod in the active position is between twenty-five and forty Newtons.
  • the crush spring is in contact with the contact plate.
  • the crushing spring comprises at least one coil at the end of the spring, this coil comprising a portion of flat surface perpendicular to the axis of revolution of the spring in contact with the contact plate.
  • the retaining collar is integral with the contact rod.
  • the crushing spring is held by a closing clip able to be positioned against a radial closing surface of the contact rod.
  • the number of turns of the crushing spring is greater than two.
  • the crushing spring in the rest position of the contact rod, is prestressed and applies a force of 45 Newtons + or - 10% on the contact plate.
  • the present invention also relates to a starter comprising a contactor.
  • the figures 1A and 1B show a diagram of a starter contactor 1 comprising a cover 3 enclosing a set of coils 5.
  • the set of coils 5 defines at its center a tubular chamber 7 in which is disposed a magnetic core 9.
  • the magnetic core 9 comprises a part fixed 9a and a movable part 9b which can move in translation, under the effect of the set of coils 5, between a rest position shown in figure 1 and an active position in which the movable part 9b comes into contact with the fixed part 9a of the magnetic core 9.
  • a helical spring 11 promotes the return to the rest position in the absence of supply to the set of coils 5.
  • the set of coils 5 comprises a take-up coil 5a and a contact coil 5b, the two coils 5a and 5b being supplied to move the movable part 9b of the magnetic core 9 from its rest position to its active position and then the maintenance in the active position of the moving part 9b is provided by the single contact coil 5b so as to limit the consumption of the set of coils 5.
  • the movable part 9b of the magnetic core 9 is connected to a fork 13 (shown partially) which drives the movement of a pinion launcher (not shown) from the starter towards the ring gear (not shown) of the heat engine to be started when the movable part 9b of the magnetic core 9 moves to its active position.
  • the movement of the movable part 9b of the magnetic core 9 in the active position causes the movement in translation with respect to the cover 3 of a contact rod 17 of a contact device 15 between a rest position shown in FIG. figure 1 and an active position.
  • the contact device 15 comprises a contact rod 17 provided with a retaining collar 17a integral in translation with the contact rod 17 and a contact plate 19 mounted on the contact rod 17.
  • the passage into the active position of the rod contact 17 causes contacting of the contact plate 19 with at least one electrical terminal.
  • the contact plate 19 comes into contact with two electrical terminals 21 and 23 to supply the electric motor (not shown) driving the rotation of the pinion.
  • the contact plate 19 is movable relative to the contact rod 17 between an initial position in which the contact rod 17 is in a rest position and a final position in which the contact rod 17 is in the active position. . In the initial position, the contact plate 19 is in contact with the retaining collar 17a and in the final position, a clearance is formed between the retaining collar 17a and the contact plate 19 due to the contact with the electrical terminals 21 and 23 .
  • the contact device 15 also comprises a crushing spring 25 mounted on the contact rod 17 which is positioned around a portion of the contact rod 17 and intended to compress when the contact plate 19 comes into contact with it. the electrical terminals 21 and 23 and a return spring 27 intended to facilitate the return of the contact device 15 to the rest position when the coils 5a and 5b are no longer supplied.
  • the figure 2 shows an exploded view of a contact device 15 according to the invention.
  • the contact device comprises a contact rod 17 made of an electrically insulating material, for example of a polymer material.
  • the contact rod 17 comprises a first radial surface forming a retaining collar 17a of a first diameter and a second radial surface forming a closing collar 17b of a second diameter smaller than the first diameter.
  • the retaining 17a and closing 17b flanges are integral with the contact rod 17, that is to say made from material with the contact rod 17.
  • the contact plate 19 is made of a conductive material, for example copper. , and comprises a central circular hole 19a, the diameter of which is greater than the diameter of the closing flange 17b and less than the diameter of the retaining flange 17a.
  • the contact plate is mounted on the contact rod 17 by inserting the contact rod 17 into the hole 19a of the contact plate 19 as indicated by the arrow 29.
  • the contact plate 19 then comes into contact with the collar. retaining 17a on a first side of the retaining collar 17a.
  • the width of the plate is substantially equal to the diameter of the retaining collar 17a so that the retaining collar 17a substantially covers the width of the contact plate 19 which contributes to the stability of the contact plate 19.
  • the spring d The crush 25 whose diameter is greater than the diameter of the hole 19a of the contact plate 19 is positioned around the contact rod 17 and comes into contact with the contact plate 17 as indicated by the arrow 31.
  • the crushing spring 25 comprises at least one turn at its end, a portion of which comprises a flat surface perpendicular to the axis of revolution of the crushing spring 25.
  • This flat surface is for example obtained by grinding at the end. of the spring in contact with the contact plate 17 so as to obtain a flat surface at the end of the crush spring 25 and increase the contact area between the crush spring 25 and the contact plate 17 and thus improve the stability of the contact plate 17 in particular during the passage into the active position of the contact rod 17.
  • the contact device 15 also comprises a closing clip 33, the radial width of which is greater than or equal to the diameter of the crushing spring 25 and in which a radial notch 33a is formed, the width of which is less than the diameter of the closing flange 17b and which is intended to receive a portion of the contact rod 17.
  • the closing clip 33 is positioned around the contact rod 17 against the radial surface formed by the closing flange 17b, as shown by the arrow 35.
  • the closing clip therefore comes between the crushing spring 25 and the flange. closure 17b so as to hold the crushing spring 25 and the contact plate 19 in position on the contact rod 17.
  • the closing clip 33 is therefore mounted on the contact rod 17 after the contact plate 19 and the crushing spring 25, the assembly of the closing clip 33 necessitating the compression of the crushing spring 25 in order to be mounted on the rod. contact 17.
  • the closing clip 33 then applies a preload on the crushing spring 25 which then applies a force on the contact plate 19 in the direction of the retaining flange 17a, which helps to keep the contact plate 19 as much as possible. on the retaining collar 17a.
  • the crushing spring 25 may also comprise a coil comprising a flat portion perpendicular to the axis of revolution of the crushing spring 25 at its second end in contact with the closing clip 33 so as to increase the contact surface between the crushing spring 25 and the closing clip 33.
  • the return spring 27 is positioned on the contact rod resting on a second side of the retaining collar opposite the first side as indicated by arrow 37.
  • the internal diameter of the return spring 27 is slightly less than or substantially equal to the first side. diameter of the end of the contact rod 17 intended to receive the return spring 27 so that the friction between the return spring 27 and the contact rod 17 allow the return spring 27 to be held in position on the return rod contact 17, in particular before it is mounted in contactor 1.
  • the return spring 27 may comprise, at least at one of its ends, a coil comprising a flat portion perpendicular to the axis of revolution of the return spring 27 so as to obtain a end with a flat surface and maximize the contact surface with the retaining collar 17a on one side and the cover 3 of the contactor 1 on the other.
  • closure clip will now be described in more detail from the figures 3a, 3b, 3c, 3d , 4a, 4b, 4c, 4d and 5 .
  • the latter comprises a peripheral centering edge 33b on its face intended to come into contact with the closure flange 17b as shown in the figures.
  • figure 3a, 3b, 3c, 3d the peripheral centering edge 33b having a diameter slightly greater than the diameter of the closure flange 17b so as to be positioned around the latter while leaving a minimum clearance between the two.
  • the closure clip 33 therefore at least partially surrounds the closure collar 17b.
  • the closing clip 33 comprises a second peripheral centering edge 33c on its second face intended to be in contact with the crushing spring 25, the second peripheral centering edge 33c having a diameter slightly greater than the diameter of the crushing spring 25 so as to come to surround at least partially the end of the crushing spring 25 while limiting the play between the latter and the closing clip 33.
  • This second peripheral centering edge 33c makes it possible to keep the crushing spring 25 in a position centered around the contact rod 17.
  • the two peripheral centering edges 33b and 33c can be different, for example in the case where the diameter of the crushing spring 25 and of the closing flange 17b are different but can also be identical in the case where the diameter of the crushing spring 25 and of the closing flange 17b are substantially identical so as to facilitate the manufacture of the clip of f closure 33 and reduce manufacturing costs.
  • the figure 5 shows a section of the device, the closure clip 33 of which is according to the embodiment of the figure 4a to 4D , in the state mounted on the contact rod 17.
  • the first peripheral centering edge 33b is positioned around the closing flange 17b and the second peripheral centering edge 33c is positioned in the center of the crushing spring 25 allowing thus maintaining and centering the crushing spring 25 around the contact rod 17.
  • the crushing springs 25 and return springs 27 are generally metallic helical springs, for example made of steel.
  • the stiffness of the squeeze spring 25 is greater than the stiffness of the return spring 27.
  • the squeeze spring 25 is compressed between the contact pad 19 and the closure clip 33 so that 'in the rest state of the contact device 15, a preload between 40 and 50 Newtons is applied to the crushing spring 25.
  • the figure 6 shows a figure of the contact device 15 in the assembled state. This contact device 15 has only five parts: the contact rod 17, the return spring 27, the contact plate 19, the crushing spring 25 and the closing clip 33. This small number of parts makes it possible to reduce the load. cost of the device and make assembly simpler and faster, which also makes it possible to reduce assembly costs.
  • the power supply to the set of coils 5 therefore causes the contact rod to move into the active position, which causes the contact plate to come into contact with the electrical terminals 21 and 23.
  • the crushing spring 25 applies a force on the contact plate 19 at least 20 Newtons greater than the force exerted by the return spring spring 27 on the contact rod 17 due to the difference in stiffness between the crushing spring 25 and the return spring 27.
  • the force exerted by the return spring 27 on the contact rod 17 is within a range of 25 to 40 Newtons.
  • the force exerted by the crushing spring 25 on the contact plate 19 is for example 51 Newtons while the force exerted by the return spring 27 on the contact rod 17 is 28 Newtons.
  • This greater force of the crushing spring 25 relative to the return spring 27 makes it possible to limit the play formed between the contact plate 19 and the retaining collar 17a in the final position of the contact plate 19, that is to say. ie at the time of contact with the electrical terminals 21 and 23.
  • the rebound undergone by the contact plate 19 is therefore reduced when the contact rod 17 goes into the active position so that the power supply to the electric motor is carried out without qu 'there are false contacts.
  • the coils 5a and 5b of the set of coils 5 are no longer supplied.
  • the return spring 27 makes it possible to disconnect the contact plate 19 of the electrical terminals 21 and 25 so as to allow the return of the contact rod 17 in the rest position.
  • a crushing spring 25 having a large diameter, a large number of turns, a turn comprising a flat portion perpendicular to its axis of revolution at the level of at least one of its ends and of which the stiffness is greater than the stiffness of the return spring 27 makes it possible to obtain a more stable contact device when passing from the rest position to the active position when the contact plate 19 comes into contact with the electrical terminals 21 and 23 which makes it possible to greatly reduce or even eliminate the rebound effect due to the docking of the contact plate 19 on the electrical terminals 21 and 23 or due to the balancing of the crushing spring 25 after this docking.
  • the contact device 15 according to the present invention therefore makes it possible, by virtue of its structure and its reduced number of parts, to obtain a contact device 15 that is reliable over time, having a reduced production cost and reducing or eliminating the effect of rebound when switch 1 is activated.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Push-Button Switches (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Claims (11)

  1. Anlasserschütz (1) umfassend:
    - eine Abdeckung (3),
    - einen Kontaktstift (17), der bezogen auf die Abdeckung (3) zwischen einer Ruheposition und einer aktiven Position beweglich ist,
    - einen Haltekragen (17a), der translatorisch fest mit dem Kontaktstift (17) verbunden ist,
    - ein Kontaktplättchen (19) aus elektrisch leitendem Material, das am Kontaktstift (17) angebracht ist, wobei das Kontaktplättchen (19) bezogen auf den Kontaktstift (17) zwischen einer Ausgangsposition, in der sich der Kontaktstift (17) in der Ruheposition befindet, und einer Endposition, in sich der Kontaktstift (17) in der aktiven Position befindet, beweglich ist, wobei das Kontaktplättchen (19) in der Ausgangsposition mit dem Haltekragen (17a) in Kontakt steht und in der Endposition ein Spiel zwischen dem Haltekragen (17a) und dem Kontaktplättchen (19) gebildet ist,
    - mindestens einen elektrischen Anschluss (21, 23), wobei der mindestens eine elektrische Anschluss (21, 23) mit dem Kontaktplättchen (19) in dessen Endposition in Kontakt steht,
    - eine Druckfeder (25), die dazu bestimmt ist, auf einer ersten Seite des Kontaktplättchens (19) um den Kontaktstift (17) angebracht zu sein, wobei die Druckfeder (25) in der Endposition eine Druckkraft des Kontaktplättchens (19) auf den mindestens einen Anschluss ausübt,
    - eine Rückstellfeder (27), die dazu bestimmt ist, am Kontaktstift (17) auf einer zweiten Seite des Kontaktplättchens (19) angebracht zu sein, die der ersten Seite des Kontaktplättchens (19) gegenüberliegt, wobei die Rückstellfeder (27) auf den Kontaktstift (17) eine Kraft zur Rückstellung aus der aktiven Position zur Ruheposition ausübt, die es gestattet, das Kontaktplättchen (19) von dem mindestens einen elektrischen Anschluss (21, 23) zu trennen, dadurch gekennzeichnet, dass die Kraft der Druckfeder (25) auf das Kontaktplättchen (19) in der Endposition um mindestens zwanzig Newton höher als die Kraft der Rückstellfeder (27) auf den Kontaktstift (17) in der aktiven Position ist.
  2. Schütz (1) nach Anspruch 1, wobei der Kontaktstift (17) aus elektrisch isolierendem Material hergestellt ist.
  3. Schütz (1) nach Anspruch 2, wobei der Kontaktstift (17) aus Polymermaterial hergestellt ist.
  4. Schütz (1) nach einem der vorhergehenden Ansprüche, wobei die Kraft der Rückstellfeder (27) auf den Kontaktstift (17) in der aktiven Position zwischen fünfundzwanzig und vierzig Newton beträgt.
  5. Schütz (1) nach einem der vorhergehenden Ansprüche, wobei die Druckfeder (25) mit dem Kontaktplättchen (19) in Kontakt steht.
  6. Schütz (1) nach Anspruch 5, wobei die Druckfeder (25) mindestens eine Windung am Ende der Feder (25) aufweist, wobei diese Windung einen ebenen Flächenabschnitt aufweist, der senkrecht zur Umdrehungsachse der Feder verläuft, die mit dem Kontaktplättchen (19) in Kontakt steht.
  7. Schütz (1) nach Anspruch 6, wobei der Haltekragen (17a) mit dem Kontaktstift (17) einstückig ausgebildet ist.
  8. Schütz (1) nach einem der vorhergehenden Ansprüche, wobei die Druckfeder (25) von einem Verschlussclip (33) gehalten wird, der geeignet ist, gegen eine radiale Verschlussfläche (17b) des Kontaktstifts (17) positioniert zu sein.
  9. Schütz (1) nach einem der vorhergehenden Ansprüche, wobei die Anzahl von Windungen der Druckfeder (25) größer als zwei ist.
  10. Schütz (1) nach einem der vorhergehenden Ansprüche, wobei in der Ruheposition des Kontaktstifts (17) die Druckfeder (25) vorgespannt ist und eine Kraft von 45 Newton +oder- 10 % auf das Kontaktplättchen (19) ausübt.
  11. Anlasser umfassend ein Schütz (1) nach einem der vorhergehenden Ansprüche.
EP15725775.9A 2014-05-05 2015-04-22 Kontaktvorrichtung eines anlasserschütz Active EP3140843B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1454029A FR3020716B1 (fr) 2014-05-05 2014-05-05 Dispositif de contact d'un contacteur de demarreur
PCT/FR2015/051084 WO2015170025A1 (fr) 2014-05-05 2015-04-22 Dispositif de contact d'un contacteur de demarreur

Publications (2)

Publication Number Publication Date
EP3140843A1 EP3140843A1 (de) 2017-03-15
EP3140843B1 true EP3140843B1 (de) 2021-04-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP15725775.9A Active EP3140843B1 (de) 2014-05-05 2015-04-22 Kontaktvorrichtung eines anlasserschütz

Country Status (4)

Country Link
EP (1) EP3140843B1 (de)
CN (1) CN106463280A (de)
FR (1) FR3020716B1 (de)
WO (1) WO2015170025A1 (de)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2739899B1 (fr) * 1995-10-12 1997-11-21 Valeo Equip Electr Moteur Contacteur de demarreur portant des contacts fixes perfectionnes et demarreur de vehicule automobile equipe d'un tel contacteur
FR2895143B1 (fr) * 2005-12-15 2011-03-18 Valeo Equip Electr Moteur Equipage mobile pour contacteur electromagnetique et contacteur comportant un tel equipage
FR2957711B1 (fr) * 2010-03-22 2016-10-14 Valeo Equip Electr Moteur Equipage mobile pour contacteur electromagnetique et contacteur electromagnetique de puissance associe
DE102012201967B4 (de) * 2012-02-09 2019-01-17 Te Connectivity Germany Gmbh Schaltkontaktbaugruppe sowie Bausatz und Montageverfahren hierfür

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WINTZ JEAN-LUC ET AL: "Design Guideline of Contactors: Optimal Use of Assembled Contacts", 2013 IEEE 59TH HOLM CONFERENCE ON ELECTRICAL CONTACTS (HOLM 2013), IEEE, 22 September 2013 (2013-09-22), pages 1 - 10, XP032520923, ISSN: 1062-6808, ISBN: 978-1-4799-1556-9, [retrieved on 20131031], DOI: 10.1109/HOLM.2013.6651406 *

Also Published As

Publication number Publication date
WO2015170025A1 (fr) 2015-11-12
CN106463280A (zh) 2017-02-22
FR3020716A1 (fr) 2015-11-06
EP3140843A1 (de) 2017-03-15
FR3020716B1 (fr) 2017-11-03

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