EP0863531B1 - Contacteur pour couper la batterie d'une installation électrique a bord d'un véhicule - Google Patents

Contacteur pour couper la batterie d'une installation électrique a bord d'un véhicule Download PDF

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Publication number
EP0863531B1
EP0863531B1 EP97122618A EP97122618A EP0863531B1 EP 0863531 B1 EP0863531 B1 EP 0863531B1 EP 97122618 A EP97122618 A EP 97122618A EP 97122618 A EP97122618 A EP 97122618A EP 0863531 B1 EP0863531 B1 EP 0863531B1
Authority
EP
European Patent Office
Prior art keywords
shaft
contactor
cam profile
seats
base
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97122618A
Other languages
German (de)
English (en)
Other versions
EP0863531A1 (fr
Inventor
Giorgio c/o Menber's Spa Pasotto
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.)
Menbers SpA
Original Assignee
Menbers SpA
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
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Application filed by Menbers SpA filed Critical Menbers SpA
Publication of EP0863531A1 publication Critical patent/EP0863531A1/fr
Application granted granted Critical
Publication of EP0863531B1 publication Critical patent/EP0863531B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • 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
    • H01H51/08—Contacts alternately opened and closed by successive cycles of energisation and de-energisation of the electromagnet, e.g. by use of a ratchet
    • H01H51/082—Contacts alternately opened and closed by successive cycles of energisation and de-energisation of the electromagnet, e.g. by use of a ratchet using rotating ratchet mechanism
    • H01H51/084—Contacts alternately opened and closed by successive cycles of energisation and de-energisation of the electromagnet, e.g. by use of a ratchet using rotating ratchet mechanism with axial ratchet elements

Definitions

  • the present invention concerns a contactor, in particular of the type intended for use as a battery isolator in an electrical installation on board a vehicle.
  • Contactors of this type generally have a static base carrying one or more fixed contacts, an axially-movable shaft carrying one or more movable contacts which cooperate with the fixed contacts, resilient means which tend to urge the shaft towards a first operative position and an electromagnetic control device capable of generating a force which urges the shaft towards a second operative position against the action of the said resilient means.
  • one of the two operative contactor positions (the contacts being open or closed) is an unstable configuration which is maintained against the thrust of the resilient means by maintaining a voltage across the electrical coil, which generates an electromagnetic biasing force on the shaft carrying the mobile contacts.
  • the electrical consumption of the coil is undesirable where the contactor is to be used as a general battery-isolator switch in the electrical installation of a vehicle.
  • stepping relays used, for example, in domestic light installations have two stable working positions which do not need a voltage to be maintained across the coil of the electromagnetic control device.
  • the structure of these relays makes them inappropriate for use in - low voltage electrical installations where the switch currents are very high, often of the order of tens or even hundreds of amperes.
  • FR-A-1277250 discloses a contactor having the features of the preamble of claim 1, including a shaft which is movable with respect to a base in the direction of its own longitudinal axis, and which carries at least one movable contact for face-to-face cooperation with a fixed contact.
  • This contactor comprises a spring urging the shaft towards a first operative position, and an electromagnetic control device capable of generating a force which urges the shaft into a second operative position against the action of said spring.
  • a retaining device is operatively associated with the shaft and has two stable retaining positions corresponding to the first and the second operative positions of the shaft.
  • the retaining device has a cam profile with first and second stable engagement seats. The cam profile is engaged by a stationary engagement member which keeps the shaft in one of the said operative positions.
  • US-A-2703348 discloses a contactor comprising a reciprocal solenoid core, cooperating with a solenoid coil and carrying an actuating pin extending from the core and contacting the free end of an actuating arm.
  • a pin fixed to the inner surface of the coil projects into a channel track formed on the outer surface of the solenoid core.
  • the object of the present invention is to provide a contactor of the type defined in the preamble of claim 1, which is more effective and reliable then the known solutions.
  • this object is achieved by a contactor having the characteristics forming the subject of the main claim.
  • the contactor 10 includes a static base including a plate 12 made, for example, from injectionmoulded plastics material and carrying at least one fixed contact.
  • the plate 12 has two pairs of fixed contacts 14, each of which is constituted by a square element of conductive material fixed to an associated pin 16 which extends from the side of the plate 12 opposite the fixed contacts 14.
  • the pins 16 connect to conductors (not shown) of an electrical circuit.
  • the static base of the contactor 10 also includes a support element 18 formed, for example, from sheet steel having two walls 20, 22 bent at right angles to the plate 12.
  • the support element 18 also has a cover 24 and a base 26 fixed to the plate 12, for example, by means of screws 28.
  • the support element 18 carries a coil 30 capable of generating an electromagnetic biasing force.
  • the coil 30 is normally deactivated and can be activated, for example, by pressing a control button (not shown).
  • the contactor 10 includes a shaft 32 carried by the support element 18 in such a way as to be translatable along its own longitudinal axis.
  • a part 32a of the shaft 32 is slidably mounted within a tubular guide element 34 fixed to the wall 22 of the support element 18.
  • a cylindrical member 36 mounted in a freely rotatable manner on the shaft 32, is formed from ferromagnetic material and cooperates with the stationary coil 30 to form an electromagnetic drive device capable of generating a biasing force on the shaft 32.
  • the cylindrical member 36 is freely rotatable about the axis of the shaft 32 but is held axially on the shaft 32 by two shoulders 37, 40. Therefore, for movements along the longitudinal axis of the shaft 32, the cylindrical member 36 is fixed to the shaft 32.
  • a movable contact constituted by a small plate 38 made from electrically conductive material is slidably mounted on a portion 32b of the shaft 32.
  • the small plate 38 is free to slide axially along the portion 32b of the shaft 32, and is urged against the shoulder 40 by a compression coil spring 42.
  • the small plate 38 is electrically insulated from the shaft 32 by means of an insulating washer 44 which abuts against the shoulder 40 and a bush 46 fitted in a hole 48 in the plate 38.
  • the spring 42 is axially retained by an insulating washer 50 held to the shaft 32 by a circlip 52.
  • a compression coil spring 53 is interposed between the tubular guide element 34 of the element 18 and the shoulder 37 of the shaft 32. The spring 53 then exerts a resilient force on the shaft 32 in the direction indicated by the arrow F in Figure 2.
  • the outer cylindrical surface of the cylindrical member 36 is cut as a cam profile 54.
  • the cam profile 54 cooperates with at least one engagement member carried on the static base.
  • three engagement members 56 are provided constituted by radial pins carried by the wall 20 of the support element 18. Since there are three engagement members for the cam profile 54, the cam profile 54 has three identical cam sections in succession around the entire circumference of the cylindrical member 36. With reference to Figure 3, the three cam sections are indicated 58a, 58b and 58c and each extends over a circumferential portion of the cylindrical member 36 through an angle of 120°.
  • each cam section 58a, 58b, 58c has two seats indicated, respectively, 60a, 62a, 60b, 62b and 60c, 62c in correspondence with which a stable relative engagement arises between the cam profile 54 and the engagement members 56.
  • the seats 60, 62 of each cam section 58 are axially offset by a distance equal to the axial stroke followed by the shaft 32 in order to pass from a first to a second operative position.
  • the contactor when the engagement members 56 correspond with the seats 60a, 60b and 60c, the contactor is in the operative configuration in which the contacts are open while, when the engagement members 56 correspond with the seats 62a, 62b, 62c, the contactor is in the operative position with the contacts closed.
  • this situation could be reversed, that is, the operative position with the contacts closed corresponding to the seats 60a, 60b, 60c, and the operative position in which the contacts are open corresponding to the seats 62a, 62b, 62c.
  • the cam profile 54 has inclined surfaces 64a, 66a, 68a; 64b, 66b, 68b and 64c, 66c, 68c disposed so as to cause a relative angular movement of the engagement members 56 and the cylindrical member 36 corresponding with a relative axial, to and fro movement of the cylindrical member 36 and the engagement members 56 in the directions indicated by the arrows A and B in Figure 3.
  • the surfaces 64, 66 and 68 are disposed so as to cause an angular movement of the cylindrical member 36 equal to the angular offset between the seats 60 and 62 as a function of a complete, to and fro movement of the shaft 32 in the directions indicated by the arrows A and B. Consequently, the shaft 32 moves alternatively from one operative position to the other following each activation of the coil 30.
  • the contactor is in the open-contact position as the small plate 38 is axially spaced from the fixed contacts 14.
  • the engagement members 56 engage the associated seats 60a, 60b, 60c of the cam profile.
  • the contactor is in a stable configuration as the force of the spring 53 is counteracted by the mechanical contact of the engagement members 56 against the associated seats 60a, 60b 60c of the cam profile 54.
  • the coil is deactivated. By activating the coil, a biasing force is generated on the ferromagnetic core constituted by the cylindrical member 36, which force causes the shaft 32 to move axially against the action of the spring 53.
  • Figure 5 shows the contactor at the end of its stroke in the direction indicated by the arrow C in Figure 5.
  • the engagement members 56 are at the top of the inclined surfaces 66a, 66b, 66c ( Figure 3).
  • the position illustrated in Figure 5 is an unstable position as, when the biasing action of the coil ceases, the shaft 32 tends to move in the opposite direction to that indicated by the arrow C in Figure 5, due to the thrust of the spring 53.
  • the coil is only energised for the time necessary for the shaft 52 to move to the configuration shown in Figure 5.
  • the coil is deenergised immediately afterwards and the shaft 32, due to the thrust of the spring 53, moves into the configuration shown in Figure 6.
  • the engagement members 56 engage the associated seats 62a, 62b, 62c ( Figure 3). In this operative position, the contacts are closed.
  • the coil is re-energised in order to move the contactor into the open-contact configuration, thus returning the shaft 32 downwards to the configuration of Figure 7. Thereafter, as soon as the supply to the coil has been interrupted, the shaft 32 moves upwards under the thrust of the spring 53, bringing it into the open-contact configuration illustrated in Figure 8, which is identical to the starting configuration illustrated in Figure 4.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Battery Mounting, Suspending (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Electromagnets (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Claims (5)

  1. Contacteur destiné à être utilisé en particulier comme isolateur de batterie d'accumulateurs dans une installation électrique embarquée sur un véhicule, comprenant :
    une base statique (12, 18) portant au moins un contact fixe (14),
    un arbre (32) mobile par rapport à la base (12, 18) dans la direction de son axe longitudinal et qui porte au moins un contact mobile (38) destiné à coopérer face à face avec le contact fixe (14),
    un dispositif élastique (53) tendant à rappeler l'arbre (32) vers une première position de fonctionnement, et
    un dispositif électromagnétique de commande (30, 36) capable de créer une force qui tend à chasser l'arbre (32) vers une seconde position de fonctionnement malgré l'action du dispositif élastique (53), et
    un dispositif de retenue (54, 56) associé pendant le fonctionnement à l'arbre (32) et à la base (18, 12), et ayant deux positions stables de retenue qui correspondent à la première et à la seconde position de fonctionnement de l'arbre (32), le dispositif de retenue (54, 56) étant destiné à passer de l'une à l'autre des positions stables de retenue chaque fois que le dispositif électromagnétique de commande (30, 36) est activé,
       caractérisé en ce que le dispositif de retenue comporte un organe (36) fixé axialement à l'arbre (32) et qui peut tourner librement autour de cet arbre.
  2. Contacteur selon la revendication 1, dans lequel ledit organe (36) a un profil de came (54) qui coopère avec au moins un organe fixe de coopération (56) porté par la base (18).
  3. Contacteur selon la revendication 2, caractérisé en ce que le profil de came (54) comporte au moins un premier siège (60a, 60b, 60c) et un second siège (62a, 62b, 62c) de coopération stable associés entre le profil de came (54) et l'organe de coopération (56), le premier et le second siège étant espacés axialement et circonférentiellement l'un par rapport à l'autre.
  4. Contacteur selon la revendication 3, caractérisé en ce que le premier et le second siège (60a, 60b, 60c, 62a, 62b, 62c) de coopération sont raccordés l'un à l'autre par une branche ayant un profil de came comprenant des surfaces inclinées (64a, 64b, 64c, 66a, 66b, 66c, 68a, 68b, 68c) pouvant faire tourner l'organe cylindrique (36) d'une quantité égale au déplacement angulaire des sièges et en correspondance avec chaque déplacement axial de l'arbre (32) après l'activation du dispositif de commande.
  5. Contacteur selon la revendication 4, caractérisé en ce que le dispositif de retenue comprend au moins deux organes de coopération (56), et en ce que le profil de came a au moins deux tronçons identiques (58a, 58b, 58c) placés en série l'un avec l'autre et s'étendant chacun le long d'une partie de la surface de l'organe cylindrique ayant une étendue angulaire égale à 360°/n, n étant le nombre d'organes de coopération.
EP97122618A 1997-03-06 1997-12-22 Contacteur pour couper la batterie d'une installation électrique a bord d'un véhicule Expired - Lifetime EP0863531B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT97TO000182A IT1291168B1 (it) 1997-03-06 1997-03-06 Contattore, in particolare per il distacco delle batterie in impianti elettrici a bordo di veicoli.
ITTO970182 1997-03-06

Publications (2)

Publication Number Publication Date
EP0863531A1 EP0863531A1 (fr) 1998-09-09
EP0863531B1 true EP0863531B1 (fr) 2001-03-14

Family

ID=11415476

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97122618A Expired - Lifetime EP0863531B1 (fr) 1997-03-06 1997-12-22 Contacteur pour couper la batterie d'une installation électrique a bord d'un véhicule

Country Status (5)

Country Link
EP (1) EP0863531B1 (fr)
AT (1) ATE199796T1 (fr)
DE (1) DE69704261T2 (fr)
ES (1) ES2157516T3 (fr)
IT (1) IT1291168B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011119306A1 (de) 2011-11-24 2013-05-29 Daimler Ag Kontaktpaarung mit einer Doppelkontaktstelle für ein elektrisches Schaltgerät

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2820878B1 (fr) * 2001-02-15 2004-04-02 Soderep Ecans Sa Perfectionnement a un dispositif de manoeuvre bistable en translation d'un axe mobile
FR2820877B1 (fr) * 2001-02-15 2005-02-11 Soderep Ecans Sa Dispositif de manoeuvre bistable en translation d'un axe mobile
ITTO20110396A1 (it) * 2011-05-05 2012-11-06 Menber S Spa Contattore, in particolare per il distacco delle batterie in impianti elettrici a bordo di veicoli
ITTO20110397A1 (it) * 2011-05-05 2012-11-06 Menber S Spa Contattore, in particolare per il distacco delle batterie in impianti elettrici a bordo di veicoli
US11710592B2 (en) 2019-11-17 2023-07-25 Littelfuse, Inc. Bi-stable mechanical latch including positioning spheres

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE879726C (de) * 1949-11-25 1953-06-15 Hans Sauer Elektromechanischer Rotor zur Betaetigung von Schaltern, Relais, Pumpen, Werkzeugen, Drehwerken und aehnlichen Geraeten
US2703348A (en) * 1950-06-24 1955-03-01 Oswald E Knapp Remote control switch
FR1277250A (fr) * 1961-01-06 1961-11-24 Coupe-circuit pour véhicule
US3290631A (en) * 1963-07-18 1966-12-06 Albright Engineers Ltd Latched closed electric solenoid switch
US4725801A (en) * 1986-10-24 1988-02-16 Hamilton Standard Controls, Inc. Bistable solenoid switch

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011119306A1 (de) 2011-11-24 2013-05-29 Daimler Ag Kontaktpaarung mit einer Doppelkontaktstelle für ein elektrisches Schaltgerät
WO2013075765A1 (fr) 2011-11-24 2013-05-30 Daimler Ag Paire de contacts pourvue d'un site de contact double pour un appareil de commutation électrique

Also Published As

Publication number Publication date
IT1291168B1 (it) 1998-12-29
DE69704261T2 (de) 2001-07-19
ATE199796T1 (de) 2001-03-15
DE69704261D1 (de) 2001-04-19
ES2157516T3 (es) 2001-08-16
EP0863531A1 (fr) 1998-09-09
ITTO970182A1 (it) 1998-09-06

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