EP0369844B1 - Locking mechanism for a current-limiting contactor - Google Patents

Locking mechanism for a current-limiting contactor Download PDF

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Publication number
EP0369844B1
EP0369844B1 EP89402918A EP89402918A EP0369844B1 EP 0369844 B1 EP0369844 B1 EP 0369844B1 EP 89402918 A EP89402918 A EP 89402918A EP 89402918 A EP89402918 A EP 89402918A EP 0369844 B1 EP0369844 B1 EP 0369844B1
Authority
EP
European Patent Office
Prior art keywords
levers
cam
switches
rollers
locked
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
EP89402918A
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German (de)
French (fr)
Other versions
EP0369844A1 (en
Inventor
André Faffart
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.)
Telemecanique SA
Original Assignee
La Telemecanique Electrique SA
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Publication of EP0369844A1 publication Critical patent/EP0369844A1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H89/00—Combinations of two or more different basic types of electric switches, relays, selectors and emergency protective devices, not covered by any single one of the other main groups of this subclass
    • H01H89/06—Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device
    • H01H89/08—Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device with both devices using the same contact pair
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/42—Driving mechanisms, i.e. for transmitting driving force to the contacts using cam or eccentric
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/20—Interlocking, locking, or latching mechanisms
    • H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H01H50/06—Bases; Casings; Covers having windows; Transparent cases or covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/005—Inversing contactors

Definitions

  • the present invention relates to a lock mechanism for a contactor-limiter, of the type comprising, in a manner similar to that described in French patent FR-A-2 570 872 filed in the name of the applicant and having served to delimit the preamble of the independent claims 1 and 2 of the present application, at least one set of switches which can be actuated on closing and on opening by a control electromagnet, which constitutes its contactor function, or even on opening alone by a device which, associated with an overload detector, ensures rapid opening corresponding to the limiter function.
  • the limiter function has priority over that of the contactor, which means that in the event of closing on a short circuit, the opening process of the switches must be carried out as quickly as possible.
  • the opening command of the switches is carried out by an appropriate mechanism, the interruption of the supply of the electromagnet intervening only to confirm the interruption.
  • An object of the invention is to provide a mechanism of the kind described in the aforementioned French patent which is extremely reliable and quick to operate, while being relatively inexpensive.
  • An object of the invention is also such a mechanism which can also be associated with a reversing contactor-limiter produced by two contactor-limiters mounted side by side.
  • An additional object is a mechanism of this type which can take three stable positions, namely "stop”, “on”, “triggered” and a transient reset position.
  • a lock mechanism for a contactor-limiter comprising two sets of power switches, each being actuated on closing and on opening by a control electromagnet by means of a push block on each of which also acts the lock mechanism by occupying at least two stable positions: a locked position of automatic operation which authorizes the closing of the sets of switches by the control electromagnets and a triggered position in which the mechanism lock maintains the two sets of switches in the open position, the passage from the locked position to the tripped position being effected vigorously.
  • the invention also relates to a lock mechanism for a contactor-limiter as described in claim 2 in which the two levers act on the same push-button.
  • the movable contacts of the switches can be brought into the normally closed position by means of return springs and actuated by the action on the push-button of an electromagnet ensuring the contactor function.
  • the rotary cam is mounted freely on a second axis perpendicular to the first parallel axes of said first levers and has a heel which allows it to be kept in said locked position by a first trigger capable to be erased to release the cam which is then brought back energetically into said triggered position by means of elastic means which are applied to the first two levers.
  • each of the levers specified above has the shape of a Z, it is articulated in the vicinity of a bend of the Z, its free end located on the side of its articulation carries a corresponding roller , and its other free end is located opposite the pusher block. Thanks to this arrangement, an energetic and well-multiplied action is obtained on the push-pieces and their switches.
  • the cam of the mechanism according to the invention has the shape of an S, and its rollers are supported on its outer contour.
  • the axis of rotation of this cam is integral with a control button at one end, which carries three locking and control cams and which is returned to a "stop” position by a helical spring which surrounds it. It is by turning this button that the mechanism is moved to the "stop", “automatic” and “reset” positions.
  • this control button can be secured to a first finger capable of pushing the rotary cam towards its locking position, position in which it engages the first trigger and is locked in rotation.
  • the rotary cam can then be released by actuating this first trigger by means of one or more fault detection relays.
  • the central axis of the device specified above carries a first control cam whose periphery has a notch into which can penetrate, under the action of second elastic means, a second finger mounted on a second lever which ensures, in this position, the closing of a switch mounted in series with the electromagnet excitation circuit serving to ensure the "contactor" function. This corresponds to the "automatic operation" position of the device.
  • the mechanism according to the invention comprises a cleat which is pivotally mounted on a third fixed axis against a spring and which can be blocked by two triggers each of which can be unlocked by a relay. fault detection.
  • One of these triggers can be the one which also blocks the main S-cam specified above and which is controlled by a fault detection relay, while the other is controlled by another fault detection relay, a link may or may not exist between these two triggers.
  • the mechanism according to the invention serves to open and close two sets of three switches 1a and 1b, the movable contacts of each group being actuated simultaneously by a pusher block 2a or 2b, respectively.
  • the latter pushes the three corresponding contacts in the direction of the opening shown in the figure, and this against springs 3a or 3b which tend to recall their respective groups of movable contacts 1a and 1b in the direction of closing.
  • the members associated with the two push-pieces 2a and 2b are symmetrical, and, for reasons of simplification, they will be designated by the same reference mark whether or not followed by the letter a or b, respectively.
  • Each pusher block 2 can be pushed or released by an electromagnet A or B by means of a lever A ′ or B ′ and against a spring A ⁇ or B ⁇ , the switches 1 closing when the corresponding electromagnet is excited.
  • Each pusher block 2 can also be pushed towards the switches 1 by one end of a lever 4.
  • this lever has the shape of a lying Z, and it is articulated around an axis 5 which is perpendicular to its plan and which is located in the vicinity of the point of Z opposite the pusher concerned.
  • the other end of this lever 4 carries a roller 6 whose axis extends substantially in the plane of the lever and in the extension of the branch of the Z which carries it.
  • Each of the two rollers 6 rests on a rotary cam 7 which is common to them, which extends substantially in the plane of the rollers 6 and which is freely mounted on an axis 8 perpendicular to the axes 5.
  • the rollers 6 are applied to the profile of the rotary cam 7 by tension springs 9, and are each guided in their movements by a disc D, respectively D ′ Which runs freely on a raceway R, R ′ parallel to the axis of the rollers.
  • a rotary control button 10 can be made integral with the other end of the axis 8 which can thus be rotated as indicated by the arrow F1 against a helical return spring 11 which surrounds it and which tends to bring it back to the "stop" position.
  • the axis 8 is integral with a cam 12 with three tracks perpendicular to the axis, and with a finger 13 which is parallel to the axis 8 and which projects in the plane of the rotary cam 7.
  • FIGS. 2 to 5 we find the push-pieces 2 of the switches 1, the levers in Z, 4 and, this time in exploded top view, the rollers 6 according to the external profile of the rotary cam. 7. Also seen, also in top view, tracks 14, 15 and 16 of the three-track cam as well as the control button 10 in its four positions. The axis 8 which connects the latter to the cams 14, 15 and 16 is shown diagrammatically by a vertical mixed line.
  • the trigger cam 7 has substantially the shape of an S mounted in its center on the axis 8, so that its width, taken along a fixed line contained in the plane of Figure 1, can go from a small value ( Figure 4) where the rollers 6 are close to each other, to a greater value ( Figures 2, 3 and 5) by spreading the rollers 6 from each other and pivoting towards the outside, against the springs 9, the branches of the Z-shaped levers, 4 which carry the rollers 6.
  • the opposite branch of the Z deviates from the associated pusher block 2, that the latter deviates from the movable contacts of the switches 1, and that these close under the effect of the springs 3.
  • the triggering cam 7 can be blocked by a spout of a trigger 17 which engages in a heel 18 formed in the external profile of the cam 7.
  • the trigger 17 is articulated on an axis 19 perpendicular to the plane of the cam 7, while its beak, pushed towards the latter by a spring 20, can be released from the heel 18 by a fault detection relay, not shown, which rotates the trigger in the direction of the arrow F2, against spring 20.
  • a cleat 21 is articulated on a pivot 22 parallel to the axis 8, at a distance therefrom and against a return spring 23. It has a finger 24 which is directed towards the axis 8 and which bears, under the effect of the spring 23, on the cam 14.
  • the latter successively comprises: a heel 25 against which the finger 24 abuts to block the axis 8 in an angular position corresponding to the "stop" position "against the action of the spring 11, and a circular portion allowing a rotation of a quarter of a turn of the axis 8 in a clockwise direction from the" off "position.
  • the cleat 21 further comprises an arcuate extension 28 which surrounds the axis 8 over a quarter of a circle approximately, opposite the finger 26, and which comprises an outer heel 29 capable of engaging with a beak of a second trigger 30.
  • This spout is pushed towards the heel 29 by a spring 31 and it can be erased by rotation of the trigger 30, against this spring 31, under the effect of another non fault detection means shown which acts in the direction of arrow F2 ′.
  • the two triggers 17 and 30 are secured in their movements by a lever 32, and a judicious calculation of the lever arms makes it possible to have on each of them a different tripping force and adapted to the fault detection means used, for example , to a thermal or magnetic protection relay, or to an undervoltage or voltage transmission relay.
  • the cleat 21 also has a shoulder 33 into which a rod 34 secured to the trigger 17 can penetrate.
  • the cam 16 secured to the axis 8 has, on its periphery, a rectangular notch 35 into which a finger 36 can penetrate which is formed at one end of a lever 37 articulated at 38, and which is pushed towards the cam 16 by a spring 39.
  • the other end of the lever 37 carries a pusher 40 which acts on the movable blade 41 of a switch 42 placed in series in the supply circuits of the coils of the electromagnets.
  • a pin 43 integral with the cleat 21 can rotate the lever 37 in the direction where the finger 36 comes out of the notch 35 of the cam 16.
  • the lever 37 in the elbow which it forms in line with the finger 36, has a recess 44 which is open towards the outside on the side of this finger by a narrow channel 45.
  • a loop spring 46 is housed in the recess 44, and its two ends are anchored in the walls of the lever 37, so that it tends to close the channel 45 against the elasticity. clean of the thermoplastic molded material which constitutes the lever in question.
  • FIGS. 2 to 5 correspond respectively to the "stop”, “automatic”, “triggered” and “reset” positions of the control button 10, these positions of the button being shown on the left side of each figure.
  • the cleat 21 is fixed in rotation in both directions by the spouts of the two triggers 17 and 30.
  • the finger 36 of the lever 37 rests on the periphery of the cam 16, at the outside of the notch 35, so that the switch 42 is open and the electromagnets A and B are not energized.
  • the push-pieces 2 are therefore pressed on the switches 1 by the levers A ′ and B ′, and the switches 1 are open.
  • the Z-shaped levers, 4 are separated from the push-pieces 2 by the cam 7, by means of the rollers 6, because the cam 7, in line with the latter, has its greatest width and is blocked by the trigger 17 in engagement with its heel 18, as well as by the finger 13 secured to the control button 10.
  • the recess 44 of the lever 37 and its loop spring 46 serve to allow correct hooking in the "automatic” position without hampering the triggering: during a maneuver of the button 10 towards the "stop” position, the notch 35 of the cam 16 biases downwardly the finger 36 held in abutment by the spring 39, and this, until exhaust, tilting of the lever 37 and opening of the switch 42.
  • the S-cam, 7 can rotate under the effect of the rollers 6 on which the springs act 9.
  • the rollers come together, which causes the free ends of the levers in Z, 4 to move towards the blocks- pushers 2 and to open the switches 1.
  • the switch 42 opens, which removes the supply of electromagnets A and B which also press push-buttons 2 to open switches 1.
  • the device which has just been described in its application to a reversing contactor-limiter device can be applied to a simple contactor-limiter, by replacing the push-buttons 2a and 2b of FIG. 1 with a single push-button 2 shown on Figure 6 on which act the free ends of the two levers in Z, 4a and 4b.
  • FIG. 7 represents means for the execution of an additional function called "verification of the opening positivity", and which use an unlocking cam 50 driven in rotation by the control button 10.
  • a lever 51 articulated at 52 and pushed by a spout 53 of the release cam 50 the latter acts on the push-button or blocks 2, independently of the rest of the mechanism, which, by forced action on the button 10, makes it possible to '' remove foreign bodies or overcome possible jams.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Push-Button Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Trip Switchboards (AREA)
  • Basic Packing Technique (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Description

La présente invention concerne un mécanisme à serrure pour contacteur-limiteur, du genre comprenant, d'une façon analogue à celle décrite dans le brevet français FR-A-2 570 872 déposé au nom de la demanderesse et ayant servi à délimiter le préambule des revendications indépendantes 1 et 2 de la présente demande, au moins un jeu d'interrupteurs pouvant être actionné à la fermeture et à l'ouverture par un électroaimant de commande, ce qui constitue sa fonction de contacteur, ou encore à l'ouverture seule par un dispositif qui, associé à un détecteur de surcharge, assure une ouverture rapide correspondant à la fonction de limiteur.The present invention relates to a lock mechanism for a contactor-limiter, of the type comprising, in a manner similar to that described in French patent FR-A-2 570 872 filed in the name of the applicant and having served to delimit the preamble of the independent claims 1 and 2 of the present application, at least one set of switches which can be actuated on closing and on opening by a control electromagnet, which constitutes its contactor function, or even on opening alone by a device which, associated with an overload detector, ensures rapid opening corresponding to the limiter function.

La fonction de limiteur est prioritaire sur celle de contacteur, ce qui veut dire qu'en cas de fermeture sur court-circuit, le processus d'ouverture des interrupteurs doit s'effectuer le plus rapidement possible. A cette fin, la commande d'ouverture des interrupteurs est réalisée par un mécanisme approprié, la coupure de l'alimentation de l'électroaimant n'intervenant que pour confirmer la coupure.The limiter function has priority over that of the contactor, which means that in the event of closing on a short circuit, the opening process of the switches must be carried out as quickly as possible. To this end, the opening command of the switches is carried out by an appropriate mechanism, the interruption of the supply of the electromagnet intervening only to confirm the interruption.

On connaît par ailleurs, par le brevet US-A-2 229 981, un interrupteur à plusieurs positions actionné par des cames.Furthermore, from US-A-2 229 981, a multi-position switch actuated by cams is known.

Un but de l'invention est de proposer un mécanisme du genre de celui décrit dans le brevet français précité qui soit extrêmement fiable et à fonctionnement rapide, tout en étant relativement peu coûteux.An object of the invention is to provide a mechanism of the kind described in the aforementioned French patent which is extremely reliable and quick to operate, while being relatively inexpensive.

Un objet de l'invention est en outre un tel mécanisme qui puisse être également associé à un contacteur-limiteur inverseur réalisé par deux contacteurs-limiteurs montés côte à côte.An object of the invention is also such a mechanism which can also be associated with a reversing contactor-limiter produced by two contactor-limiters mounted side by side.

Un objet supplémentaire est un mécanisme de ce type qui puisse prendre trois positions stables, à savoir "arrêt", "marche", "déclenché" et une position transitoire de réarmement.An additional object is a mechanism of this type which can take three stable positions, namely "stop", "on", "triggered" and a transient reset position.

L'invention parvient à ces résultats au moyen d'un mécanisme à serrure pour contacteur-limiteur comprenant deux jeux d'interrupteurs de puissance, chacun étant actionné à la fermeture et à l'ouverture par un électroaimant de commande par l'intermédiaire d'un bloc-poussoir sur chacun desquels agit également le mécanisme de serrure en occupant au moins deux positions stables : une position verrouillée de marche automatique qui autorise la fermeture des jeux d'interrupteurs par les électroaimants de commande et une position déclenchée dans laquelle le mécanisme de serrure maintient les deux jeux d'interrupteurs en position ouverte, le passage de la position verrouillée à la position déclenchée s'effectuant énergiquement.The invention achieves these results by means of a lock mechanism for a contactor-limiter comprising two sets of power switches, each being actuated on closing and on opening by a control electromagnet by means of a push block on each of which also acts the lock mechanism by occupying at least two stable positions: a locked position of automatic operation which authorizes the closing of the sets of switches by the control electromagnets and a triggered position in which the mechanism lock maintains the two sets of switches in the open position, the passage from the locked position to the tripped position being effected vigorously.

Selon l'invention, ce mécanisme de serrure est caractérisé en ce qu'il comprend :

  • deux premiers leviers, chacun d'eux étant respectivement articulé autour d'un premier axe fixe, les deux premier axes fixes étant parallèles, chacun de ces deux leviers agissant respectivement sur le bloc-poussoir qui lui est associé, chacun desdits leviers comprenant un galet, et
  • de premiers moyens élastiques qui appliquent lesdits galets sur le profil d'une came rotative présentant au droit des galets, une largeur maximale dans ladite position verrouillée, et une largeur minimale dans ladite position déclenchée,
  • des moyens pour faire passer cette came rotative de la position verrouillée où elle maintient les premiers leviers écartés des bloc-poussoirs, vers la position déclenchée où les premiers leviers agissent sur les bloc-poussoirs pour maintenir les jeux d'interrupteurs en position ouverte.
According to the invention, this lock mechanism is characterized in that it comprises:
  • first two levers, each of them being respectively articulated around a first fixed axis, the two first fixed axes being parallel, each of these two levers acting respectively on the pusher block associated therewith, each of said levers comprising a roller , and
  • first elastic means which apply said rollers to the profile of a rotary cam having at right angles to the rollers, a maximum width in said locked position, and a minimum width in said triggered position,
  • means for passing this rotary cam from the locked position where it keeps the first levers away from the push-buttons, towards the triggered position where the first levers act on the push-buttons to maintain the sets of switches in the open position.

L'invention concerne également un mécanisme à serrure pour contacteur-limiteur tel que décrit à la revendication 2 dans lequel les deux leviers agissent sur le même bloc-poussoir.The invention also relates to a lock mechanism for a contactor-limiter as described in claim 2 in which the two levers act on the same push-button.

Il convient de noter qu'en position verrouillée, les contacts mobiles des interrupteurs peuvent être amenés en position normalement fermée grâce à des ressorts de rappels et actionnés grâce à l'action sur le bloc-poussoir d'un électroaimant assurant la fonction contacteur.It should be noted that in the locked position, the movable contacts of the switches can be brought into the normally closed position by means of return springs and actuated by the action on the push-button of an electromagnet ensuring the contactor function.

Selon un mode d'exécution avantageux de l'invention, la came rotative est montée libre sur un second axe perpendiculaire aux premiers axes parallèles desdits premiers leviers et présente un talon qui lui permet d'être maintenue dans ladite position verrouillée par une première gâchette susceptible de s'effacer pour libérer la came qui est alors ramenée énergiquement dans ladite position déclenchée par l'intermédiaire des moyens élastiques qui s'appliquent sur les deux premiers leviers.According to an advantageous embodiment of the invention, the rotary cam is mounted freely on a second axis perpendicular to the first parallel axes of said first levers and has a heel which allows it to be kept in said locked position by a first trigger capable to be erased to release the cam which is then brought back energetically into said triggered position by means of elastic means which are applied to the first two levers.

On comprend que, lorsque l'on déverrouille la came rotative de ce dispositif, laquelle est libre de tourner autour de son axe qui lui est perpendiculaire, les galets qui s'appuient sur elle, la serrent grâce à leurs moyens élastiques de rappel et l'amènent vers sa position de plus faible largeur. Les galets qui s'appuient sur elle se rapprochent simultanément l'une de l'autre en provoquant un basculement des leviers, dont les extrémités libres viennent repousser le bloc-poussoir dans le sens de l'ouverture des interrupteurs.It is understood that, when the rotary cam of this device is unlocked, which is free to rotate about its axis which is perpendicular to it, the rollers which rest on it, tighten it by means of their elastic return means and the 'bring to its narrower position. The rollers which rest on it simultaneously approach each other, causing the levers to tilt, the free ends of which push the push block in the direction of opening of the switches.

Selon une forme de réalisation avantageuse de ce mécanisme, chacun des leviers spécifiés ci-avant présente la forme d'un Z, il est articulé au voisinage d'un coude du Z, son extrémité libre située du côté de son articulation porte un galet correspondant, et son autre extrémité libre est située en regard du bloc-poussoir. Grâce à cette disposition, on obtient une action énergique et bien démultipliée sur les blocs-poussoirs et leurs interrupteurs.According to an advantageous embodiment of this mechanism, each of the levers specified above has the shape of a Z, it is articulated in the vicinity of a bend of the Z, its free end located on the side of its articulation carries a corresponding roller , and its other free end is located opposite the pusher block. Thanks to this arrangement, an energetic and well-multiplied action is obtained on the push-pieces and their switches.

De préférence, la came du mécanisme selon l'invention présente la forme d'un S, et ses galets s'appuient sur son contour extérieur.Preferably, the cam of the mechanism according to the invention has the shape of an S, and its rollers are supported on its outer contour.

Avantageusement, l'axe de rotation de cette came est solidaire d'un bouton de commande à une extrémité, qui porte trois cames de verrouillage et de commande et qui est rappelé vers une position "arrêt" par un ressort hélicoïdal qui l'entoure. C'est en faisant tourner ce bouton que l'on fait passer le mécanisme aux positions "arrêt", "automatique" et "réarmement".Advantageously, the axis of rotation of this cam is integral with a control button at one end, which carries three locking and control cams and which is returned to a "stop" position by a helical spring which surrounds it. It is by turning this button that the mechanism is moved to the "stop", "automatic" and "reset" positions.

Par ailleurs, ce bouton de commande peut être solidaire d'un premier doigt susceptible de pousser la came rotative vers sa position de verrouillage, position dans laquelle elle vient en prise avec la première gâchette et se trouve bloquée en rotation. La came rotative peut être ensuite libérée par actionnement de cette première gâchette au moyen d'un ou plusieurs relais de détection de défaut.Furthermore, this control button can be secured to a first finger capable of pushing the rotary cam towards its locking position, position in which it engages the first trigger and is locked in rotation. The rotary cam can then be released by actuating this first trigger by means of one or more fault detection relays.

Avantageusement, l'axe central du dispositif spécifié ci-avant porte une première came de commande dont la périphérie présente une encoche dans laquelle peut pénétrer, sous l'action de seconds moyens élastiques, un second doigt monté sur un second levier qui assure, dans cette position, la fermeture d'un interrupteur monté en série avec le circuit d'excitation des électroaimants servant à assurer la fonction "contacteur". Ceci correspond à la position "marche automatique" du dispostif.Advantageously, the central axis of the device specified above carries a first control cam whose periphery has a notch into which can penetrate, under the action of second elastic means, a second finger mounted on a second lever which ensures, in this position, the closing of a switch mounted in series with the electromagnet excitation circuit serving to ensure the "contactor" function. This corresponds to the "automatic operation" position of the device.

Selon une forme de réalisation avantageuse, le mécanisme selon l'invention comporte un taquet qui est monté pivotant sur un troisième axe fixe à l'encontre d'un ressort et qui peut être bloqué par deux gâchettes dont chacune peut être déverrouillée par un relais de détection de défaut. L'une de ces gâchettes peut être celle qui bloque également la came principale en S spécifiée ci-avant et qui est commandée par un relais de détection de défaut, cependant que l'autre est commandée par un autre relais de détection de défaut, une liaison pouvant ou non exister entre ces deux gâchettes.According to an advantageous embodiment, the mechanism according to the invention comprises a cleat which is pivotally mounted on a third fixed axis against a spring and which can be blocked by two triggers each of which can be unlocked by a relay. fault detection. One of these triggers can be the one which also blocks the main S-cam specified above and which is controlled by a fault detection relay, while the other is controlled by another fault detection relay, a link may or may not exist between these two triggers.

Lorsque le mécanisme selon l'invention doit fonctionner comme un contacteur-limiteur inverseur, les leviers spécifiés ci-avant agissent simultanément sur les blocspoussoirs correspondant à l'ensemble des interrupteurs à actionner.When the mechanism according to the invention must function as a reversing contactor-limiter, the levers specified above act simultaneously on the push-buttons corresponding to all of the switches to be actuated.

La description qui va suivre, et qui ne présente aucun caractère limitatif, permettra de bien comprendre comment la présente invention peut être mise en pratique. Elle doit être lue en regard des dessins annexés, parmi lesquels :

  • La figure 1 montre une vue de côté schématique du mécanisme à serrure selon la présente invention, associé à deux contacteurs ;
  • Les figures 2 à 5 représentent le mécanisme de la figure 1 dont certains organes ont été arrachés et représentés en vue de dessus, respectivement pour les quatre positions de son bouton tournant de commande ;
  • La figure 6 montre une vue de côté schématique partielle d'un contacteur-limiteur selon l'invention ; et
  • La figure 7 montre un dispositif de déblocage du mécanisme de l'invention.
The description which follows, and which has no limiting character, will make it possible to understand clearly how the present invention can be put into practice. It should be read against the accompanying drawings, among which:
  • Figure 1 shows a schematic side view of the lock mechanism according to the present invention, associated with two contactors;
  • Figures 2 to 5 show the mechanism of Figure 1, some parts of which have been broken away and shown in top view, respectively for the four positions of its rotary control button;
  • FIG. 6 shows a partial schematic side view of a contactor-limiter according to the invention; and
  • FIG. 7 shows a device for unlocking the mechanism of the invention.

Comme on le voit sur la figure 1, le mécanisme selon l'invention sert à ouvrir et à fermer deux jeux de trois interrupteurs 1a et 1b, les contacts mobiles de chaque groupe étant actionnés simultanément par un bloc-poussoir 2a ou 2b, respectivement. Ce dernier pousse les trois contacts correspondants dans le sens de l'ouverture représenté sur la figure, et ce à l'encontre de ressorts 3a ou 3b qui tendent à rappeler leurs groupes de contacts mobiles respectifs 1a et 1b dans le sens de la fermeture.As can be seen in FIG. 1, the mechanism according to the invention serves to open and close two sets of three switches 1a and 1b, the movable contacts of each group being actuated simultaneously by a pusher block 2a or 2b, respectively. The latter pushes the three corresponding contacts in the direction of the opening shown in the figure, and this against springs 3a or 3b which tend to recall their respective groups of movable contacts 1a and 1b in the direction of closing.

Les organes associés aux deux blocs-poussoirs 2a et 2b sont symétriques, et, pour des raisons de simplification, on les désignera par le même repère suivi ou non de la lettre a ou b, respectivement.The members associated with the two push-pieces 2a and 2b are symmetrical, and, for reasons of simplification, they will be designated by the same reference mark whether or not followed by the letter a or b, respectively.

Chaque bloc-poussoir 2 peut être poussé ou libéré par un électroaimant A ou B par l'intermédiaire d'un levier A′ ou B′ et à l'encontre d'un ressort A˝ ou B˝, les interrupteurs 1 se fermant lorsque l'électroaimant correspondant est excité.Each pusher block 2 can be pushed or released by an electromagnet A or B by means of a lever A ′ or B ′ and against a spring A˝ or B˝, the switches 1 closing when the corresponding electromagnet is excited.

Chaque bloc-poussoir 2 peut être poussé également vers les interrupteurs 1 par une extrémité d'un levier 4. A cette fin, ce levier présente la forme d'un Z couché, et il est articulé autour d'un axe 5 qui est perpendiculaire à son plan et qui est situé au voisinage de la pointe du Z opposée au poussoir concerné. L'autre extrémité de ce levier 4 porte un galet 6 dont l'axe s'étend sensiblement dans le plan du levier et dans le prolongement de la branche du Z qui le porte. Chacun des deux galets 6 s'appuie sur une came rotative 7 qui leur est commune, qui s'étend sensiblement dans le plan des galets 6 et qui est montée libre sur un axe 8 perpendiculaire aux axes 5. Les galets 6 sont appliqués sur le profil de la came rotative 7 par des ressorts de traction 9, et sont chacun guidés dans leurs déplacements par un disque D, respectivement D′ qui roule librement sur un chemin de roulement R, R′ parallèle à l'axe des galets.Each pusher block 2 can also be pushed towards the switches 1 by one end of a lever 4. To this end, this lever has the shape of a lying Z, and it is articulated around an axis 5 which is perpendicular to its plan and which is located in the vicinity of the point of Z opposite the pusher concerned. The other end of this lever 4 carries a roller 6 whose axis extends substantially in the plane of the lever and in the extension of the branch of the Z which carries it. Each of the two rollers 6 rests on a rotary cam 7 which is common to them, which extends substantially in the plane of the rollers 6 and which is freely mounted on an axis 8 perpendicular to the axes 5. The rollers 6 are applied to the profile of the rotary cam 7 by tension springs 9, and are each guided in their movements by a disc D, respectively D ′ Which runs freely on a raceway R, R ′ parallel to the axis of the rollers.

Un bouton rotatif de commande 10 peut être rendu solidaire de l'autre extrémité de l'axe 8 que l'on peut ainsi faire tourner comme indiqué par la flèche F1 à l'encontre d'un ressort hélicoïdal de rappel 11 qui l'entoure et qui tend à le ramener vers la position "arrêt". Enfin, l'axe 8 est solidaire d'une came 12 à trois pistes perpendiculaires à l'axe, et d'un doigt 13 qui est parallèle à l'axe 8 et qui fait saillie dans le plan de la came rotative 7.A rotary control button 10 can be made integral with the other end of the axis 8 which can thus be rotated as indicated by the arrow F1 against a helical return spring 11 which surrounds it and which tends to bring it back to the "stop" position. Finally, the axis 8 is integral with a cam 12 with three tracks perpendicular to the axis, and with a finger 13 which is parallel to the axis 8 and which projects in the plane of the rotary cam 7.

On se reportera maintenant aux figures 2 à 5 où l'on retrouve les blocs-poussoirs 2 des interrupteurs 1, les leviers en Z, 4 et, cette fois en vue de dessus éclatée, les galets 6 suivant le profil extérieur de la came rotative 7. On y voit aussi, également en vue de dessus, les pistes 14, 15 et 16 de la came à trois pistes ainsi que le bouton de commande 10 dans ses quatre positions. L'axe 8 qui relie ce dernier aux cames 14, 15 et 16 est schématisé par un trait mixte vertical.We will now refer to FIGS. 2 to 5 where we find the push-pieces 2 of the switches 1, the levers in Z, 4 and, this time in exploded top view, the rollers 6 according to the external profile of the rotary cam. 7. Also seen, also in top view, tracks 14, 15 and 16 of the three-track cam as well as the control button 10 in its four positions. The axis 8 which connects the latter to the cams 14, 15 and 16 is shown diagrammatically by a vertical mixed line.

La came de déclenchement 7 présente sensiblement la forme d'un S monté en son centre sur l'axe 8, de sorte que sa largeur, prise selon une ligne fixe contenue dans le plan de la figure 1, peut passer d'une valeur faible (figure 4) où les galets 6 sont proches l'un de l'autre, à une valeur plus importante (figures 2, 3 et 5) en écartant les galets 6 l'un de l'autre et en faisant pivoter vers l'extérieur, à l'encontre des ressorts 9, les branches des leviers en Z, 4 qui portent les galets 6. Il en résulte que la branche opposée du Z s'écarte du bloc-poussoir associé 2, que ce dernier s'écarte des contacts mobiles des interrupteurs 1, et que ceux-ci se ferment sous l'effet des ressorts 3.The trigger cam 7 has substantially the shape of an S mounted in its center on the axis 8, so that its width, taken along a fixed line contained in the plane of Figure 1, can go from a small value (Figure 4) where the rollers 6 are close to each other, to a greater value (Figures 2, 3 and 5) by spreading the rollers 6 from each other and pivoting towards the outside, against the springs 9, the branches of the Z-shaped levers, 4 which carry the rollers 6. As a result, the opposite branch of the Z deviates from the associated pusher block 2, that the latter deviates from the movable contacts of the switches 1, and that these close under the effect of the springs 3.

C'est dans cette position que la came de déclenchement 7 peut être bloquée par un bec d'une gâchette 17 qui vient en prise dans un talon 18 ménagé dans le profil extérieur de la came 7. La gâchette 17 est articulée sur un axe 19 perpendiculaire au plan de la came 7, cependant que son bec, poussé vers cette dernière par un ressort 20, peut être dégagé du talon 18 par un relais de détection de défaut, non représenté, qui fait tourner la gâchette dans le sens de la flèche F2, à l'encontre du ressort 20.It is in this position that the triggering cam 7 can be blocked by a spout of a trigger 17 which engages in a heel 18 formed in the external profile of the cam 7. The trigger 17 is articulated on an axis 19 perpendicular to the plane of the cam 7, while its beak, pushed towards the latter by a spring 20, can be released from the heel 18 by a fault detection relay, not shown, which rotates the trigger in the direction of the arrow F2, against spring 20.

On comprend aisément que, lorsque le bec de la gâchette 17 s'efface par rapport au talon 18 de la came 7, cette dernière tourne dans le sens de la plus faible largeur entre les galets 6, car ceux-ci sont tirés l'un vers l'autre par les ressorts 9. La came 7 prend alors la position représentée sur la figure 4.It is easily understood that, when the beak of the trigger 17 disappears relative to the heel 18 of the cam 7, the latter rotates in the direction of the smallest width between the rollers 6, because these are pulled one towards the other by the springs 9. The cam 7 then takes the position shown in FIG. 4.

Un taquet 21 est articulé sur un pivot 22 parallèle à l'axe 8, à distance de celui-ci et à l'encontre d'un ressort de rappel 23. Il comporte un doigt 24 qui est dirigé vers l'axe 8 et qui s'appuie, sous l'effet du ressort 23, sur la came 14. Celle-ci comporte successivement : un talon 25 contre lequel le doigt 24 vient en butée pour bloquer l'axe 8 dans une position angulaire correspondant à la position "arrêt" contre l'action du ressort 11, et une portion circulaire autorisant une rotation d'un quart de tour de l'axe 8 dans le sens des aiguilles d'une montre à partir de la position "arrêt".A cleat 21 is articulated on a pivot 22 parallel to the axis 8, at a distance therefrom and against a return spring 23. It has a finger 24 which is directed towards the axis 8 and which bears, under the effect of the spring 23, on the cam 14. The latter successively comprises: a heel 25 against which the finger 24 abuts to block the axis 8 in an angular position corresponding to the "stop" position "against the action of the spring 11, and a circular portion allowing a rotation of a quarter of a turn of the axis 8 in a clockwise direction from the" off "position.

Quant à la came 15 de l'axe 8, représentée seulement sur la figure 4, ses rotations dans le sens inverse des aiguilles d'une montre, et donc celles de l'axe 8 qui en est solidaire, sont bloquées par un autre doigt 26 dirigé vers l'intérieur à l'extrémité du taquet 21 qui vient en prise avec un méplat 27 ménagé sur cette came 15, en position "déclenchée".As for the cam 15 of the axis 8, shown only in FIG. 4, its rotations anticlockwise, and therefore those of the axis 8 which is integral therewith, are blocked by another finger 26 directed inwards at the end of the cleat 21 which engages with a flat 27 formed on this cam 15, in the "triggered" position.

Le taquet 21 comprend encore un prolongement arqué 28 qui entoure l'axe 8 sur un quart de cercle environ, à l'opposé du doigt 26, et qui comporte un talon extérieur 29 susceptible de venir en prise avec un bec d'une seconde gâchette 30. Ce bec est poussé vers le talon 29 par un ressort 31 et il peut en être effacé par rotation de la gâchette 30, à l'encontre de ce ressort 31, sous l'effet d'un autre moyen de détection de défaut non représenté qui agit dans le sens de la flèche F2′.The cleat 21 further comprises an arcuate extension 28 which surrounds the axis 8 over a quarter of a circle approximately, opposite the finger 26, and which comprises an outer heel 29 capable of engaging with a beak of a second trigger 30. This spout is pushed towards the heel 29 by a spring 31 and it can be erased by rotation of the trigger 30, against this spring 31, under the effect of another non fault detection means shown which acts in the direction of arrow F2 ′.

Les deux gâchettes 17 et 30 sont solidarisées dans leurs déplacements par un levier 32, et un calcul judicieux des bras de leviers permet d'avoir sur chacune d'elles un effort de déclenchement différent et adapté au moyen de détection de défaut utilisé, par exemple, à un relais de protection thermique ou magnétique, ou à un relais à manque de tension ou à émission de tension.The two triggers 17 and 30 are secured in their movements by a lever 32, and a judicious calculation of the lever arms makes it possible to have on each of them a different tripping force and adapted to the fault detection means used, for example , to a thermal or magnetic protection relay, or to an undervoltage or voltage transmission relay.

Enfin, le taquet 21 comporte encore un épaulement 33 dans lequel peut pénétrer une tige 34 solidaire de la gâchette 17.Finally, the cleat 21 also has a shoulder 33 into which a rod 34 secured to the trigger 17 can penetrate.

La came 16 solidaire de l'axe 8 comporte, sur sa périphérie, une encoche rectangulaire 35 dans laquelle peut pénétrer un doigt 36 qui est ménagé à une extrémité d'un levier 37 articulé en 38, et qui est poussé vers la came 16 par un ressort 39. L'autre extrémité du levier 37 porte un poussoir 40 qui agit sur la lame mobile 41 d'un interrupteur 42 placé en série dans les circuits d'alimentation des bobines des électroaimants. Lorsque le doigt 36 est en position normale sur la périphérie de la came 16 (figures 2, 4 et 5), le poussoir 40 appuie sur la lame mobile 41, et l'interrupteur 42 est ouvert, alors que, lorsque ce doigt 36 pénètre dans l'encoche 35 de la came 16 (figure 3), le poussoir 40 relâche la lame 41 et l'interrupteur 42 se ferme.The cam 16 secured to the axis 8 has, on its periphery, a rectangular notch 35 into which a finger 36 can penetrate which is formed at one end of a lever 37 articulated at 38, and which is pushed towards the cam 16 by a spring 39. The other end of the lever 37 carries a pusher 40 which acts on the movable blade 41 of a switch 42 placed in series in the supply circuits of the coils of the electromagnets. When the finger 36 is in normal position on the periphery of the cam 16 (Figures 2, 4 and 5), the pusher 40 presses on the movable blade 41, and the switch 42 is open, whereas, when this finger 36 penetrates in the notch 35 of the cam 16 (FIG. 3), the pusher 40 releases the blade 41 and the switch 42 closes.

De plus, une broche 43 solidaire du taquet 21 peut faire tourner le levier 37 dans le sens où le doigt 36 sort de l'encoche 35 de la came 16.In addition, a pin 43 integral with the cleat 21 can rotate the lever 37 in the direction where the finger 36 comes out of the notch 35 of the cam 16.

D'autre part, et pour des raisons qui seront exposées plus loin, le levier 37, dans le coude qu'il forme au droit du doigt 36, présente un évidement 44 qui est ouvert vers l'extérieur du côté de ce doigt par un étroit canal 45. Un ressort en boucle 46 est logé dans l'évidement 44, et ses deux extrémités sont ancrées dans les parois du levier 37, de telle sorte qu'il tende à refermer le canal 45 à l'encontre de l'élasticité propre de la matière moulée thermoplastique qui constitue le levier en question.On the other hand, and for reasons which will be explained below, the lever 37, in the elbow which it forms in line with the finger 36, has a recess 44 which is open towards the outside on the side of this finger by a narrow channel 45. A loop spring 46 is housed in the recess 44, and its two ends are anchored in the walls of the lever 37, so that it tends to close the channel 45 against the elasticity. clean of the thermoplastic molded material which constitutes the lever in question.

Le mode de fonctionnement de ce mécanisme à serrure sera décrit maintenant en regard des figures 2 à 5 qui correspondent respectivement aux positions "arrêt", "automatique", "déclenché" et "réarmement" du bouton de commande 10, ces positions du bouton étant représentées sur la partie de gauche de chaque figure.The mode of operation of this lock mechanism will now be described with reference to FIGS. 2 to 5 which correspond respectively to the "stop", "automatic", "triggered" and "reset" positions of the control button 10, these positions of the button being shown on the left side of each figure.

Dans la position "arrêt" de la figure 2, le taquet 21 est fixé en rotation dans les deux sens par les becs des deux gâchettes 17 et 30. Le doigt 36 du levier 37 repose sur la périphérie de la came 16, à l'extérieur de l'encoche 35, de sorte que l'interrupteur 42 est ouvert et que les électroaimants A et B ne sont pas excités. Les blocs-poussoirs 2 sont donc appuyés sur les interrupteurs 1 par les leviers A′ et B′, et les interrupteurs 1 sont ouverts. Enfin, les leviers en Z, 4 sont écartés des blocs-poussoirs 2 par la came 7, par l'intermédiaire des galets 6, car la came 7, au droit de ces derniers, présente sa plus grande largeur et est bloquée par la gâchette 17 en prise avec son talon 18, ainsi que par le doigt 13 solidaire du bouton de commande 10.In the "stop" position of FIG. 2, the cleat 21 is fixed in rotation in both directions by the spouts of the two triggers 17 and 30. The finger 36 of the lever 37 rests on the periphery of the cam 16, at the outside of the notch 35, so that the switch 42 is open and the electromagnets A and B are not energized. The push-pieces 2 are therefore pressed on the switches 1 by the levers A ′ and B ′, and the switches 1 are open. Finally, the Z-shaped levers, 4 are separated from the push-pieces 2 by the cam 7, by means of the rollers 6, because the cam 7, in line with the latter, has its greatest width and is blocked by the trigger 17 in engagement with its heel 18, as well as by the finger 13 secured to the control button 10.

Lorsqu'on passe à la position "automatique" de la figure 3, où l'axe 8 et les cames 14, 15 et 16 qui lui sont associées ont tourné de 90° dans le sens des aiguilles d'une montre, le taquet 21 reste bloqué par les gâchettes 17 et 30, son doigt 24 restant au contact de la portion circulaire de la came 14. D'autre part, la came en S, 7 reste bloquée par la gâchette 17, mais elle est libérée du doigt 13 solidaire du bouton 10. La rotation de la came 16 a entraîné la pénétration du doigt 36 dans son encoche 35, ce qui a fermé l'interrupteur 42 et assure le blocage en position "auto". Les électroaimants A et B sont habilités à fonctionner. Dans cet exemple, l'électroaimant B est excité et a fait pivoter le levier B′ à l'encontre du ressort correspondant, de sorte que le bloc-poussoir 2b a relâché les contacts mobiles des interrupteurs 1b qui se ferment sous l'effet des ressorts 3b.When we move to the "automatic" position in Figure 3, where the axis 8 and the cams 14, 15 and 16 associated with it have rotated 90 ° clockwise, the cleat 21 remains blocked by the triggers 17 and 30, its finger 24 remaining in contact with the circular portion of the cam 14. On the other hand, the cam in S, 7 remains blocked by the trigger 17, but it is released from the finger 13 secured to the button 10. The rotation of the cam 16 caused the penetration of the finger 36 into its notch 35, which closed the switch 42 and ensures blocking in "auto" position. Electromagnets A and B are enabled to operate. In this example, the electromagnet B is excited and made the lever B ′ pivot against the corresponding spring, so that the pusher block 2b has released the movable contacts of the switches 1b which close under the effect of springs 3b.

On notera encore que l'évidement 44 du levier 37 et son ressort en boucle 46 servent à permettre un accrochage correct en position "automatique" sans gêner le déclenchement : lors d'une manoeuvre du bouton 10 vers la position "arrêt", l'encoche 35 de la came 16 sollicite, vers le bas, le doigt 36 maintenu en appui par le ressort 39, et cela, jusqu'à échappement, basculement du levier 37 et ouverture de l'interrupteur 42.It will also be noted that the recess 44 of the lever 37 and its loop spring 46 serve to allow correct hooking in the "automatic" position without hampering the triggering: during a maneuver of the button 10 towards the "stop" position, the notch 35 of the cam 16 biases downwardly the finger 36 held in abutment by the spring 39, and this, until exhaust, tilting of the lever 37 and opening of the switch 42.

Si, maintenant, l'un ou l'autre des relais de surcharge se déclenche, en exerçant une force F2 ou F2′ sur la gâchette 17 ou 30, ceci libère le taquet 21 qui pivote de 45° environ dans le sens opposé aux aiguilles d'une montre, sous l'effet du ressort de rappel 23, jusqu'à prendre la position de la figure 4. Parallèlement, l'axe 8 qui n'est plus retenu par le doigt 36 qui échappe à l'encoche 35, pivote sous l'effet du ressort 11, dans le sens inverse des aiguilles d'une montre jusqu'à ce que le méplat 27 de la came 15 soit retenu par le doigt 26. L'axe 8 et le bouton se trouvent alors en position "déclenchée".If, now, one or the other of the overload relays trips, exerting a force F2 or F2 ′ on the trigger 17 or 30, this releases the cleat 21 which pivots about 45 ° in the opposite direction to the needles of a watch, under the effect of the return spring 23, until it takes the position of FIG. 4. At the same time, the axis 8 which is no longer retained by the finger 36 which escapes the notch 35, pivots under the effect of the spring 11, anticlockwise until the flat 27 of the cam 15 is retained by the finger 26. The pin 8 and the button are then in position "triggered".

La gâchette 17 étant ainsi ouverte, soit directement par la force F2, soit indirectement par la force F2′ et le levier de transmission 32, la came en S, 7 peut tourner sous l'effet des galets 6 sur lesquels agissent les ressorts 9. Les galets se rapprochent, ce qui amène les extrémités libres des leviers en Z, 4 à se déplacer vers les blocs-poussoirs 2 et à ouvrir les interrupteurs 1. Du fait que le doigt 36 du levier 37 est sorti de l'encoche 35 de la came 16, l'interrupteur 42 s'ouvre, ce qui supprime l'alimentation des électroaimants A et B qui appuient également sur les blocs-poussoirs 2 pour ouvrir les interrupteurs 1.The trigger 17 being thus opened, either directly by the force F2, or indirectly by the force F2 ′ and the lever transmission 32, the S-cam, 7 can rotate under the effect of the rollers 6 on which the springs act 9. The rollers come together, which causes the free ends of the levers in Z, 4 to move towards the blocks- pushers 2 and to open the switches 1. Because the finger 36 of the lever 37 has come out of the notch 35 of the cam 16, the switch 42 opens, which removes the supply of electromagnets A and B which also press push-buttons 2 to open switches 1.

Pour réarmer le mécanisme, il suffit de tourner le bouton de commande 10 d'un peu plus de 45°, à l'encontre de son ressort hélicoïdal de rappel 11, de sorte qu'il passe légèrement au-delà de la position d'arrêt de la figure 2. La came 7, poussée par le doigt 13 solidaire du bouton 10, s'enclenche alors par son talon 18 sur la gâchette 17, avec une légère surcourse, cependant que le taquet 21 reprend sa position initiale où il est bloqué par les deux gâchettes 17 et 30, et ce, grâce à l'action du talon 25 de la came 14 qui pousse le doigt 24 du taquet. L'interrupteur 42 associé à la came 16 reste ouvert, et le processus peut recommencer.To reset the mechanism, simply turn the control knob 10 by a little more than 45 °, against its helical return spring 11, so that it passes slightly beyond the position of stop in FIG. 2. The cam 7, pushed by the finger 13 secured to the button 10, then engages by its heel 18 on the trigger 17, with a slight overtravel, while the cleat 21 returns to its initial position where it is blocked by the two triggers 17 and 30, and this, thanks to the action of the heel 25 of the cam 14 which pushes the finger 24 of the cleat. The switch 42 associated with the cam 16 remains open, and the process can start again.

Le dispositif qui vient d'être décrit dans son application à un appareil contacteur-limiteur inverseur peut être appliqué à un simple contacteur-limiteur, en remplaçant les blocs-poussoirs 2a et 2b de la figure 1 par un bloc-poussoir unique 2 représenté sur la figure 6 sur lequel agissent les extrémités libres des deux leviers en Z, 4a et 4b.The device which has just been described in its application to a reversing contactor-limiter device can be applied to a simple contactor-limiter, by replacing the push-buttons 2a and 2b of FIG. 1 with a single push-button 2 shown on Figure 6 on which act the free ends of the two levers in Z, 4a and 4b.

La figure 7 représente des moyens pour l'exécution d'une fonction annexe appelée "vérification de la positivité d'ouverture", et qui utilisent une came de déblocage 50 entraînée en rotation par le bouton de commande 10. Par l'intermédiaire d'un levier 51 articulé en 52 et poussé par un bec 53 de la came de déblocage 50, cette dernière agit sur le ou les blocs-poussoirs 2, indépendamment du reste du mécanisme, ce qui, par action forcée sur le bouton 10, permet d'éliminer des corps étrangers ou de vaincre des coincements éventuels.FIG. 7 represents means for the execution of an additional function called "verification of the opening positivity", and which use an unlocking cam 50 driven in rotation by the control button 10. By means of a lever 51 articulated at 52 and pushed by a spout 53 of the release cam 50, the latter acts on the push-button or blocks 2, independently of the rest of the mechanism, which, by forced action on the button 10, makes it possible to '' remove foreign bodies or overcome possible jams.

Claims (14)

  1. A lock mechanism for a limiting contact maker, comprising two sets of power switches (1a, 1b), each being closed and opened by a control electromagnet (A, B), by means of a pusher block (2a, 2b), which are also acted upon by the locking mechanism when it takes two stable positions : a locked automatic operational position which allows closing of the set of switches (1a, 1b) by the control electromagnets (A, B) and a tripped position, wherein the lock mechanism maintains the two sets of switches (1a, 1b) in the open position, movement from the locked position to the tripped position being effected energetically,
    characterized by the fact that the lock mechanism comprises :
    - two first levers (4a, 4b), each of which is respectively articulated about a first fixed shaft (5a, 5b), the first two fixed shafts (5a, 5b) being parallel, each of said two levers (4a, 4b) acting respectively on the pusher block (2a, 2b) associated therewith, each of said levers (4a, 4b) comprising a roller (6a, 6b), and
    - first resilient means (9a, 9b) which apply said rollers (6a, 6b) on the profile of a rotary cam (7) which has, in line with the rollers (6a, 6b), a maximum width in said locked position and a minimum width in said tripped position,
    - means for moving said rotary cam (7) from the locked position, where it maintains the first levers (4a, 4b) separated from the pusher blocks (2a, 2b), towards the tripped position where the first levers (4a, 4b) act on the pusher blocks (2a; 2b) for holding the set of switches (1a, 1b) in the open position.
  2. Lock mechanism for a limiting contact maker, comprising a set of power switches (1) which may be closed and opened by a control electromagnet by means of a pusher block (2), which is also acted upon by the lock mechanism taking at least two stable positions : a locked automatic operational position which allows closure of the set of switches (1) by the control electromagnet and a tripped position in which the mechanism maintains the set of switches (1) in the open position, movement from the locked position towards the tripped position being effected energetically,
    characterized by the fact that the lock mechanism comprises :
    - two first levers (4a, 4b), each of which is respectively articulated about a first fixed shaft (5a, 5b), the first two fixed shafts (5a, 5b) being parallel, each of said two levers (4a, 4b) acting on said pusher block (2) and comprising a roller (6a, 6b), and
    - first resilient means (9a, 9b) which apply said rollers (6a, 6b) on the profile of a rotary cam (7) having, in line with the rollers (6a, 6b), a maximum width in said locked position and a minimum width in said tripped position,
    - means to move said rotary cam (7) from the locked position where it holds the first levers (4a, 4b) away from the pusher block (2), towards the tripped position where the first levers (4a, 4b) act on the pusher block (2) to maintain the set of switches (1) in the open position.
  3. The mechanism according to one of claims 1 and 2,
    characterized in that the rotary cam (7) is mounted freely on a second shaft (8) perpendicular to the first parallel shafts (5a, 5b) of said first levers (4a, 4b) and has a heel (18) enabling it to be maintained in said locked position by a first trigger (17) which is retractable in order to release the cam which is then returned energetically to said tripped position by resilient means (9a, 9b) applied to the two first levers (4a, 4b).
  4. The mechanism as claimed in one of the preceding claims,
    characterized in that each of said first levers (4a, 4b) has the form of a Z, is articulated in the vicinity of a bend of the Z, its free end situated on the same side as its articulation carrying said roller (6a, 6b) and its other free end being situated opposite the pusher block (2a, 2b ; 2).
  5. The mechanism as claimed in one of the preceding claims,
    characterized in that said rotary cam (7) has the form of an S, and said rollers (6a, 6b) bear on its external contour.
  6. The mechanism as claimed in claim 5,
    characterized in that said rollers (6a, 6b) are each guided in their movement by a disk (D, D') which rolls freely on a running track (R, R') parallel to the axis of movement of the rollers (6a, 6b).
  7. The mechanism as claimed in anyone of claims 3 to 6,
    characterized in that said second shaft (8) is fast with a control knob (10) at one end, carries three locking and control cams (14, 15, 16), and is returned to a "stop" position by a helical spring (11) which surrounds it.
  8. The mechanism as claimed in claim 7,
    characterized in that said control knob (10) is fast with a first finger (13) capable of urging said rotary cam (7) towards said locked position, said first trigger (17) then engaging with said heel (18) of the rotary cam (7) and being retracted by means of an overload relay placed in series with the power switches (1a, 1b ; 1).
  9. The mechanism as claimed in one of claims 7 and 8,
    characterized in that the first cam (16) of said three locking and control cams (14, 15, 16) is a control cam and has on its periphery a notch (35) into which may penetrate, under the action of second resilient means (39), a second finger (36) mounted on an end of a second lever (37) whose other end acts on at least one switch (42a, 42b ; 42) to close same when said second finger (36) penetrates into said notch (35), said switch (42) being mounted in the energizing circuit of the control electromagnets (A, B).
  10. The mechanism as claimed in one of claims 7 to 9,
    characterized in that it comprises a dog (21) mounted for pivoting on a third fixed shaft (22) against a spring (23) and which may be locked by said first trigger (17) and a second trigger (30), each of said triggers being capable to be unlocked by an overload relay.
  11. The mechanism as claimed in claim 10,
    characterized in that the second trigger (30) is controlled by another overload relay, a mechanical drive (32) being provided between the first (17) and the second (30) trigger.
  12. The mechanism as claimed in one of claims 10 and 11,
    characterized in that said dog (21) is locked in its travel towards said tripped position by the abutment of a third finger (26) which is fast therewith on a flat (27) formed on the second cam (15) of said three locking and control cams (14, 15, 16).
  13. The mechanism as claimed in one of claims 10 to 12,
    characterized in that said dog (21) comprises a fourth finger (24) onto which bears a heel (25) provided on the third cam (14) of said three locking and control cams (14, 15, 16) to push said dog (21) towards said "stop" position.
  14. The mechanism as claimed in one of claims 1 to 13,
    characterized in that it comprises an unlocking cam (50) which is mounted on said second shaft (8) and acts on said pusher block (2) through a third lever (51).
EP89402918A 1988-11-17 1989-10-24 Locking mechanism for a current-limiting contactor Expired - Lifetime EP0369844B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8814919 1988-11-17
FR8814919A FR2639144B1 (en) 1988-11-17 1988-11-17 LOCK MECHANISM FOR LIMIT SWITCH

Publications (2)

Publication Number Publication Date
EP0369844A1 EP0369844A1 (en) 1990-05-23
EP0369844B1 true EP0369844B1 (en) 1994-03-02

Family

ID=9371919

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89402918A Expired - Lifetime EP0369844B1 (en) 1988-11-17 1989-10-24 Locking mechanism for a current-limiting contactor

Country Status (16)

Country Link
US (1) US5012214A (en)
EP (1) EP0369844B1 (en)
JP (1) JPH02192626A (en)
KR (1) KR920008833B1 (en)
CN (1) CN1023584C (en)
CA (1) CA2002308C (en)
DE (1) DE68913439T2 (en)
DK (1) DK577389A (en)
ES (1) ES2017235A6 (en)
FI (1) FI95850C (en)
FR (1) FR2639144B1 (en)
HK (1) HK128794A (en)
IE (1) IE63410B1 (en)
SE (1) SE469765B (en)
SU (1) SU1716981A3 (en)
ZA (1) ZA898352B (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1231103B (en) * 1989-08-09 1991-11-18 Sace Spa SELF-COORDINATED MANEUVERING AND PROTECTION DEVICE FOR ELECTRICAL EQUIPMENT.
FR2655769B1 (en) * 1989-12-08 1994-03-04 Telemecanique ADAPTATION DEVICE FOR AUXILIARY CONTACTS BOX.
ES2042390B1 (en) * 1992-02-18 1996-10-01 Power Controls Iberica S A MECHANICAL INTERLOCK FOR CONTACTOR BATTERIES.
FR2706221B1 (en) * 1993-06-07 1995-07-21 Telemecanique Protection switch device.
EP0669633B1 (en) * 1994-02-25 1999-09-29 Schneider Electric Industries SA Protective switching device
US5503526A (en) * 1995-01-23 1996-04-02 Neils; John J. Fire fighting fan with three point support
CN1253912C (en) 2003-05-29 2006-04-26 刘平 Electric power switch apparatus
AU2011370144B2 (en) * 2011-06-09 2015-04-02 Mitsubishi Electric Corporation Operating mechanism
DE102013222495A1 (en) * 2013-11-06 2015-05-07 Robert Bosch Gmbh protective arrangement
CN106531491B (en) * 2017-01-05 2018-11-16 常熟开关制造有限公司(原常熟开关厂） The operating mechanism of automatic change-over
CN113078031B (en) * 2021-04-02 2021-12-31 浙江安迅电气股份有限公司 Magnetic latching relay and voltage regulating device thereof

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Publication number Priority date Publication date Assignee Title
FR2570872A1 (en) * 1984-09-27 1986-03-28 Telemecanique Electrique VARIABLE COMPOSITION SWITCHING DEVICE

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Publication number Priority date Publication date Assignee Title
US2229981A (en) * 1937-02-12 1941-01-28 Gen Electric Electric switch
NL97219C (en) * 1954-05-11
US3467800A (en) * 1967-03-21 1969-09-16 Gen Electric Reversible cam actuating mechanism for electric switches
FR2516297A1 (en) * 1981-11-09 1983-05-13 Telemecanique Electrique CONTACTOR APPARATUS COMPRISING AUTOMATIC OPENING MEANS, POWER CIRCUITS, AND A LOCAL CONTROL DEVICE
DE3637418A1 (en) * 1986-11-03 1988-05-11 Kloeckner Moeller Elektrizit SWITCHING DEVICE

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
FR2570872A1 (en) * 1984-09-27 1986-03-28 Telemecanique Electrique VARIABLE COMPOSITION SWITCHING DEVICE

Also Published As

Publication number Publication date
JPH02192626A (en) 1990-07-30
IE63410B1 (en) 1995-04-19
IE893580L (en) 1990-05-17
FI895490A0 (en) 1989-11-17
SE8903650D0 (en) 1989-11-01
HK128794A (en) 1994-11-25
DE68913439D1 (en) 1994-04-07
FR2639144B1 (en) 1993-05-28
DK577389A (en) 1990-05-18
CA2002308A1 (en) 1990-05-17
DK577389D0 (en) 1989-11-17
KR900008563A (en) 1990-06-04
SU1716981A3 (en) 1992-02-28
FR2639144A1 (en) 1990-05-18
CN1023584C (en) 1994-01-19
ES2017235A6 (en) 1991-01-01
DE68913439T2 (en) 1994-08-04
CN1042796A (en) 1990-06-06
FI95850B (en) 1995-12-15
SE469765B (en) 1993-09-06
SE8903650L (en) 1990-05-18
KR920008833B1 (en) 1992-10-09
EP0369844A1 (en) 1990-05-23
FI95850C (en) 1996-03-25
US5012214A (en) 1991-04-30
ZA898352B (en) 1990-07-25
CA2002308C (en) 1995-12-26

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