EP1649478B1 - Rotary engagement lock mechanism for automatic safety cutout - Google Patents

Rotary engagement lock mechanism for automatic safety cutout Download PDF

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Publication number
EP1649478B1
EP1649478B1 EP04767738A EP04767738A EP1649478B1 EP 1649478 B1 EP1649478 B1 EP 1649478B1 EP 04767738 A EP04767738 A EP 04767738A EP 04767738 A EP04767738 A EP 04767738A EP 1649478 B1 EP1649478 B1 EP 1649478B1
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EP
European Patent Office
Prior art keywords
lever
engagement
contact
pivot
lock mechanism
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EP04767738A
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German (de)
French (fr)
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EP1649478A1 (en
Inventor
Christophe Antico
Alain Simond
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Legrand SNC
Legrand France SA
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Legrand SNC
Legrand France SA
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Priority to PL04767738T priority Critical patent/PL1649478T3/en
Publication of EP1649478A1 publication Critical patent/EP1649478A1/en
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Publication of EP1649478B1 publication Critical patent/EP1649478B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/526—Manual reset mechanisms which may be also used for manual release actuated by lever the lever forming a toggle linkage with a second lever, the free end of which is directly and releasably engageable with a contact structure

Definitions

  • the invention relates to the field of safety of electrical installations.
  • It relates more particularly to automatic safety circuit breakers for automatically opening an electrical circuit when they are triggered by the detection of an electrical fault.
  • Such circuit breakers can be for example circuit breakers adapted to open an electrical circuit in case of a short circuit or else differential switches adapted to open a circuit in case of earthing of one of the phases.
  • circuit breakers generally comprise a set of metal contacts intended to open or close the electrical circuit, as well as a mechanism for controlling the set of contacts called a lock mechanism.
  • the lock mechanism ensures the closing and the manual opening of the circuit, by the provision of a handle outside the circuit breaker, in addition to the automatic opening of the circuit following the detection of a fault. electric.
  • the document FR 2 628 262 describes such a lock mechanism in which the maintenance of the contacts in the closed position of the circuit is ensured by the attachment of a part by a pawl. In case of electrical fault, this attachment is broken and the mechanism is triggered, causing the opening of the circuit.
  • the piece intended to be hooked by the pawl is rotatably mounted on another piece controlling the contact game.
  • This lock mechanism is satisfactory with respect to its function of cutting an electrical circuit in the particular applications described in the aforementioned document.
  • the invention nevertheless aims to improve such a lock mechanism, and more generally the cooperation of the various parts involved in triggering the mechanism.
  • the hooking lever When the lock mechanism is in its contact disposition, the hooking lever is, on the one hand, maintained in a stable position by the holding means and, on the other hand, biased by the hooking end of the articulated joystick.
  • the same lock mechanism can thus be used for a wide variety of circuit breakers, regardless of the number of contacts to be controlled and regardless of the type of circuit breaker conditioning the available energy for the actuator.
  • circuit breakers for example, require greater force to be applied to the stop than in the case of unipolar or bipolar circuit breakers.
  • the very sensitive differential switches for example, provide, in the event of an electrical fault, only a few milliamperes to the actuator, while the circuit breakers can supply several amperes.
  • auxiliaries are commonly employed in association with such circuit breakers. These auxiliaries fit on the circuit breakers so as to connect mechanically to detect the triggering of the circuit breaker. These auxiliaries must of course be adapted to the lock mechanism of the circuit breaker to which they are attached. The invention thus allows, in addition, to employ a unique range of auxiliaries, adapted to the present lock mechanism, for a wide variety of circuit breakers.
  • the attachment surface of the engaging lever is formed of a cylinder portion centered on the pivot axis of the engaging lever.
  • the hooking end of the articulated lever may be formed of a cylinder portion centered on an axis parallel to the pivot axis of the engaging lever.
  • Triggering occurs when the actuator acts on the holding means to move said support away from the first contact surface.
  • the force required for this maneuver depends directly and almost exclusively on the force exerted by the mechanism spring.
  • the load applied by the spring defines the unlocking force seen by the actuator.
  • the mechanism of the spring may have a reduced design tolerance, resulting in a greater margin of safety.
  • the mechanism further comprises a biasing spring cooperating with the attachment lever and with the stand so that said stand is biased towards the engaging lever.
  • This biasing spring allows a safe operation of the mechanism insofar as said stand will permanently tend to reach the first surface for maintaining the attachment lever.
  • FIGS 1 to 4 are schematic views for explaining the operating principles of the lock mechanism.
  • Figures 5 to 8 are views of a real lock mechanism, in section, corresponding to a practical embodiment according to the diagrams of Figures 1 to 4.
  • Figures 9 to 13 show a real lock mechanism corresponding to the above embodiment.
  • each of these contacts 1, 2 is intended to be connected to the electrical circuit (not shown) that is to be protected, their contacting closing the circuit and their mutual spacing opening, on the contrary, the circuit.
  • the contacts 1, 2 are also biased to move away from each other by an opening spring 34 (shown schematically in Figures 1 to 3 by a torque arrow).
  • the articulated lever 3 formed of a manual lever 4 rotatably mounted on a fixed axis 5 relative to the housing, the latter here acting as a frame supporting the various elements of the mechanism.
  • the articulated lever 3 also comprises a connecting rod 6 connected by a pivot connection to the manual lever 4 so that the rotation of the latter causes the rod 6 to move.
  • the latter comprises a hooking end 7 represented by a circle on the diagrams of Figures 1 to 4 and made by a cylinder extending perpendicularly to the plane of the drawing in Figures 5 to 8.
  • the mobility of the articulated lever 3 allows it to take two extreme positions: an engaged position (FIGS. 1 and 5) and a triggered position (FIGS. 3 and 8), these two positions delimiting an angular amplitude of approximately 90 ° for the lever manual 4.
  • a spring 13 biases the handle 3 to its tripped position.
  • the mechanism further comprises an intermediate lever 8 in indirect engagement with the movable contact 2 via a link 9 articulated to a support 10 carrying the movable contact, the support 10 being rotatably mounted about an axis 11 fixed by compared to the case.
  • the intermediate lever 8 is rotatably mounted about an axis 12 fixed relative to the housing and arranged so that the pivoting of the lever 8 in one direction causes the movable contact 2 against the fixed contact 1 or, in the other direction, causes the movable contact 2 away from the fixed contact 1.
  • the intermediate lever 8 further includes a ramp 14 disposed at its end opposite the link 9, this ramp 14 for receiving and guiding the attachment end 7 of the rod 6.
  • the intermediate lever 8 comprises a housing formed of a stop surface 15 and a side wall 16, this housing being able to partially receive the hooking end 7.
  • the intermediate lever 8 supports an axis 17, near the ramp 14, which is rotatably mounted a latching lever 18.
  • the latter comprises a first contact surface 19 and a second contact surface 20 arranged from and other of the axis 17, and a tooth 21 having a hooking surface 22.
  • the hooking surface 22 is a cylinder portion whose axis coincides with the pivot axis 17 of the lever hanging 18.
  • a mechanism spring here a torsion spring 38, is disposed about the axis 12 of the intermediate lever 8 and exerts a torsion force between a stop rod 23 secured to the housing and the second contact surface 20, when the mechanism is in the position of Figures 1 and 5.
  • a stop pin 24 attached to the intermediate lever 8 is provided to limit the angular stroke of the engaging lever 18 relative to the intermediate lever 8.
  • the intermediate lever 8 finally supports an axis 25 on which is rotated an auxiliary lever 26 which comprises a first branch forming a stand 27 and carrying a support pin 28 intended to cooperate with the first contact surface 19 of the hooking lever 18.
  • a spring of bias 35 is further provided to bias the support tip 28 towards said first contact surface 19.
  • the auxiliary lever 26 also comprises a second branch 29 intended to cooperate with a trip lever 30.
  • the first branch 27 and the second branch 29 are disposed on either side of the axis 25 of the auxiliary lever 26.
  • the release lever 30 is rotatably mounted about a fixed axis 31 relative to the housing and comprises a first branch 32 and a second branch 33 forming here an angle of about 90 °, the second branch having a rounded corner for its cooperation with the second branch 29 of the auxiliary lever 26.
  • the trip lever 30 can be set in motion by an electromechanical actuator 36 fixed relative to the housing and which has a retracted position (FIGS. 1 and 5) and an extended position (FIGS. 2 and 6), the passage from the retracted position to the output position being effected by electrically feeding the jack 36 when the electrical fault which causes the triggering of the mechanism is detected.
  • an electromechanical actuator 36 fixed relative to the housing and which has a retracted position (FIGS. 1 and 5) and an extended position (FIGS. 2 and 6), the passage from the retracted position to the output position being effected by electrically feeding the jack 36 when the electrical fault which causes the triggering of the mechanism is detected.
  • the auxiliary lever 26 and the release lever 30 form holding means that can thereby be set in motion by the jack 36.
  • the rod of the jack 36 acts on the first leg 32 of the release lever 30.
  • a resetting finger 37 extending perpendicularly. in the drawings and which is intended to cooperate with the mechanism spring 38.
  • the mechanism as shown in Figures 1 and 5 is in its contact position. To bring it into this position, generally from a triggered position as shown in Figures 3 and 8, it is necessary to engage the mechanism by operating the manual lever 4 (which is the only element of the mechanism to protrude of the housing) from its triggered position to its engaged position.
  • the rotation of the manual lever 4 causes the connecting rod 6 to have its catching end 7 against a stop 39 formed by the convergence of the stop surfaces 15 and hooking surfaces 22.
  • the hooking end 7 thus slips, as and when the manual lever 4 is rotated, in the funnel formed by the stop 39 to take up a position where it is in direct contact with both the surface of the 15 only with the hooking surface 22. From this moment, the further rotation of the manual lever 4 causes the pivoting of the intermediate lever 8 and, consequently, the bringing together of the contacts 1, 2.
  • auxiliary lever 26 is biased by the bias spring 35 to come into contact with the first contact surface 19 of the attachment lever 18.
  • the mechanism spring 38 will thus load until the mechanism has reached the stable contact position of Figures 1 and 5 in which the link 9 is buttressed.
  • a first component F 1 is applied to the hooking surface 22 and a second component F 2 is applied to the stop surface 15.
  • the attachment end 7 thus exerts no torque tending to rotate the latching lever, only the axis 17 itself undergoes an effort.
  • the jack 36 When an electrical fault occurs, the jack 36 will move into the extended position (see FIG. 6), causing the trigger lever 30 to pivot and thus the auxiliary lever 26 to pivot.
  • Figures 9 to 13 show a variant of the lock mechanism described.
  • the mechanism according to this variant is in all respects identical to the previous except for the reset of the cylinder 36 which is not done by the mechanism spring 38 acting on a reset finger 37 but by a reset spring 40 specific. This, visible in FIG. 9, which represents the mechanism seen on the other side, solicits an angular movement of separation between the end of the second branch 33 of the trip lever 30 and the intermediate lever 8.
  • a stopper 41 is further provided to limit the stroke of the mechanism spring 38.
  • triggering which is performed by an auxiliary external to the mechanism and which acts directly in rotation on the auxiliary lever 26.
  • the cylinder 36 and the trip lever 30 can thus be eliminated.

Landscapes

  • Lock And Its Accessories (AREA)
  • Mechanical Control Devices (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Agricultural Machines (AREA)
  • Centrifugal Separators (AREA)
  • Jib Cranes (AREA)
  • Soil Working Implements (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)

Abstract

The mechanism has a spring mechanism (38) and a lever (8) with a stop surface. The surface and a coupling surface (22) define housing with walls forming a stop when a coupling lever (18) is in stable position. A coupling end of a hand-lever (3) is forced against the stop. The surface (22) is conformed such that at all points of the surface, a normal to the surface is oriented along a direction meeting a rotating axis of the lever (18).

Description

L'invention a trait au domaine de la sécurité des installations électriques.The invention relates to the field of safety of electrical installations.

Elle concerne plus particulièrement les coupe-circuits automatiques de sécurité permettant d'ouvrir automatiquement un circuit électrique lorsqu'ils sont déclenchés par la détection d'un défaut électrique.It relates more particularly to automatic safety circuit breakers for automatically opening an electrical circuit when they are triggered by the detection of an electrical fault.

De tels coupe-circuits peuvent être par exemple des disjoncteurs adaptés à ouvrir un circuit électrique en cas de court-circuit ou encore des interrupteurs différentiels adaptés à ouvrir un circuit en cas de mise à la terre d'une des phases.Such circuit breakers can be for example circuit breakers adapted to open an electrical circuit in case of a short circuit or else differential switches adapted to open a circuit in case of earthing of one of the phases.

Ces coupe-circuits comportent généralement un jeu de contacts métalliques destinés à ouvrir ou à fermer le circuit électrique, ainsi qu'un mécanisme de commande du jeu de contacts appelé mécanisme de serrure.These circuit breakers generally comprise a set of metal contacts intended to open or close the electrical circuit, as well as a mechanism for controlling the set of contacts called a lock mechanism.

Le mécanisme de serrure assure la fermeture et l'ouverture manuelle du circuit, par la mise à disposition d'une manette à l'extérieur du coupe-circuit, en plus de l'ouverture automatique du circuit suite à la détection d'un défaut électrique.The lock mechanism ensures the closing and the manual opening of the circuit, by the provision of a handle outside the circuit breaker, in addition to the automatic opening of the circuit following the detection of a fault. electric.

Le document FR 2 628 262 décrit un tel mécanisme de serrure dans lequel le maintien des contacts en position de fermeture du circuit est assuré par l'accrochage d'une pièce par un cliquet. En cas de défaut électrique, cet accrochage est rompu et le mécanisme se déclenche, provoquant l'ouverture du circuit.The document FR 2 628 262 describes such a lock mechanism in which the maintenance of the contacts in the closed position of the circuit is ensured by the attachment of a part by a pawl. In case of electrical fault, this attachment is broken and the mechanism is triggered, causing the opening of the circuit.

Dans ce mécanisme de serrure, la pièce destinée à être accrochée par le cliquet est montée tournante sur une autre pièce commandant le jeu de contact.In this lock mechanism, the piece intended to be hooked by the pawl is rotatably mounted on another piece controlling the contact game.

Ce mécanisme de serrure, appelé "mécanisme à accrochage tournant", donne satisfaction en ce qui concerne sa fonction de coupure d'un circuit électrique dans les applications particulières décrites dans le document précité.This lock mechanism, called "rotating latching mechanism", is satisfactory with respect to its function of cutting an electrical circuit in the particular applications described in the aforementioned document.

L'invention vise néanmoins à améliorer un tel mécanisme de serrure, et plus généralement la coopération des différentes pièces impliquées dans le déclenchement du mécanisme.The invention nevertheless aims to improve such a lock mechanism, and more generally the cooperation of the various parts involved in triggering the mechanism.

Elle propose à cet effet un mécanisme de serrure à accrochage tournant pour coupe-circuit automatique de sécurité, comportant :

  • un bâti ;
  • une manette articulée montée pivotante sur un axe fixe par rapport au bâti et présentant une extrémité d'accrochage, ladite manette admettant une position enclenchée et une position déclenchée et étant sollicitée par un ressort vers sa position déclenchée ;
  • un levier intermédiaire monté pivotant autour d'un axe fixe par rapport au bâti et adapté à coopérer avec l'extrémité d'accrochage de la manette articulée ;
  • un levier d'accrochage monté pivotant autour d'un axe porté par le levier intermédiaire et comportant une surface d'accrochage adaptée à coopérer avec l'extrémité d'accrochage de la manette articulée ;
  • un ressort de mécanisme sollicitant ledit levier d'accrochage à pivoter autour de son axe dans un sens prédéterminé ;
  • un dispositif de contact comportant au moins un contact fixe et au moins un contact mobile correspondant, ce dispositif admettant une première position dans laquelle le contact fixe et le contact mobile sont écartés l'un de l'autre, et une deuxième position dans laquelle le contact fixe et le contact mobile sont maintenus l'un contre l'autre, le passage de la première à la deuxième position étant commandé par le levier intermédiaire ;
  • des moyens de maintien du levier d'accrochage dans une position stable, comportant une béquille contre laquelle ledit levier d'accrochage est adapté à venir en appui sous l'effet dudit ressort de mécanisme ;
  • un actionneur admettant une position rentrée dans laquelle il est en retrait par rapport aux moyens de maintien et une position sortie dans laquelle il agit sur les moyens de maintien ;
ledit mécanisme admettant une position de contact dans laquelle la manette articulée, dans sa position enclenchée, est arc-boutée pour solliciter ladite extrémité d'accrochage contre une butée formée conjointement par la surface d'accrochage du levier d'accrochage dans sa position stable et le levier intermédiaire, et sollicite ainsi le levier intermédiaire pour maintenir le dispositif de contact dans sa deuxième position ;
le mécanisme étant caractérisé en ce que le levier intermédiaire comporte une surface d'arrêt et en ce que, lorsque le levier d'accrochage est dans sa position stable, la surface d'accrochage et la surface d'arrêt délimitent un logement à parois convergentes formant ladite butée contre laquelle est sollicitée l'extrémité d'accrochage de la manette articulée, la surface d'accrochage étant conformée pour qu'en tout point de cette surface d'accrochage, la normale à cette surface est orientée suivant une direction rencontrant l'axe de pivotement du levier d'accrochage.It proposes for this purpose a latching lock mechanism rotating for automatic safety circuit breaker, comprising:
  • a building;
  • an articulated lever pivotally mounted on a fixed axis relative to the frame and having a hooking end, said handle having a latched position and a triggered position and being biased by a spring towards its triggered position;
  • an intermediate lever pivotally mounted about a fixed axis relative to the frame and adapted to cooperate with the attachment end of the hinged lever;
  • a hooking lever pivotally mounted about an axis carried by the intermediate lever and having a hooking surface adapted to cooperate with the hooking end of the hinge lever;
  • a mechanism spring urging said latch lever to pivot about its axis in a predetermined direction;
  • a contact device comprising at least one fixed contact and at least one corresponding moving contact, this device admitting a first position in which the fixed contact and the movable contact are spaced from each other, and a second position in which the fixed contact and the movable contact are held against each other, the passage from the first to the second position being controlled by the intermediate lever;
  • means for holding the coupling lever in a stable position, comprising a stand against which said engaging lever is adapted to bear under the effect of said mechanism spring;
  • an actuator admitting a retracted position in which it is recessed relative to the holding means and an extended position in which it acts on the holding means;
said mechanism admitting a position of contact in which the articulated lever, in its engaged position, is buttressed to solicit said hooking end against an abutment formed jointly by the attachment surface of the engaging lever in its stable position and the intermediate lever, and thus urges the intermediate lever to maintain the contact device in its second position;
the mechanism being characterized in that the intermediate lever comprises a stop surface and in that, when the attachment lever is in its stable position, the attachment surface and the stop surface delimit a housing with converging walls forming said abutment against which is applied the attachment end of the articulated lever, the attachment surface being shaped so that at any point of this attachment surface, the normal to this surface is oriented in a direction facing the pivoting axis of the coupling lever.

Lorsque le mécanisme de serrure est dans sa disposition de contact, le levier d'accrochage est, d'une part, maintenu dans une position stable par les moyens de maintien et, d'autre part, sollicité par l'extrémité d'accrochage de la manette articulée.When the lock mechanism is in its contact disposition, the hooking lever is, on the one hand, maintained in a stable position by the holding means and, on the other hand, biased by the hooking end of the articulated joystick.

La direction de la force avec laquelle l'extrémité d'accrochage sollicite ledit levier passe par l'axe de rotation de ce même levier et permet de s'affranchir de tout couple qu'aurait exercé la manette articulée sur le levier d'accrochage.The direction of the force with which the attachment end biases said lever passes through the axis of rotation of the same lever and eliminates any torque that would have exerted the joystick articulated on the lever attachment.

Aucune force tendant à faire tourner ledit levier autour de son axe ne vient donc s'ajouter à la sollicitation du ressort de mécanisme.No force tending to rotate said lever about its axis is therefore added to the bias of the mechanism spring.

Par conséquent, il est par exemple possible d'augmenter la force de sollicitation de la manette sur la butée, et donc d'augmenter la pression des contacts les uns contre les autres pour augmenter les performances en coupure ou en échauffement.Therefore, it is for example possible to increase the biasing force of the handle on the stop, and therefore to increase the pressure of the contacts against each other to increase the performance in cutoff or heating.

Cette augmentation de la force est sans effet sur la rotation du levier de déclenchement, mis à part les forces de frottement engendrées par le contact de l'extrémité d'accrochage contre la butée. Le ressort de mécanisme est prévu pour vaincre ces forces de frottement et permettre ainsi la rotation du levier d'accrochage lors du déclenchement du mécanisme. Il est ainsi possible d'employer les mêmes moyens de maintien quelle que soit la pression que l'on désire appliquer au contact.This increase in the force has no effect on the rotation of the release lever, apart from the frictional forces generated by the contact of the attachment end against the stop. The mechanism spring is provided to overcome these friction forces and thus allow rotation of the latch lever when triggering the mechanism. It is thus possible to use the same means of maintenance whatever the pressure that one wishes to apply to the contact.

Le même mécanisme de serrure peut ainsi être utilisé pour une grande variété de coupe-circuits, quel que soit le nombre de contacts à commander et quel que soit le type de coupe-circuit conditionnant l'énergie disponible pour l'actionneur.The same lock mechanism can thus be used for a wide variety of circuit breakers, regardless of the number of contacts to be controlled and regardless of the type of circuit breaker conditioning the available energy for the actuator.

En effet, les coupe-circuits tétrapolaires, par exemple, nécessitent d'exercer une force sur la butée plus importante que dans le cas des coupe-circuits unipolaires ou bipolaires.Four-pole circuit breakers, for example, require greater force to be applied to the stop than in the case of unipolar or bipolar circuit breakers.

De même, les interrupteurs différentiels très sensibles, par exemple, ne fournissent, en cas de défaut électrique, que quelques milliampères à l'actionneur, tandis que les disjoncteurs peuvent fournir plusieurs ampères.Similarly, the very sensitive differential switches, for example, provide, in the event of an electrical fault, only a few milliamperes to the actuator, while the circuit breakers can supply several amperes.

L'utilisation d'un mécanisme commun à une grande variété de produits permet, du point de vue du constructeur, d'abaisser les coûts de fabrication et de réduire les risques d'erreur de montage en simplifiant le procédé de fabrication.The use of a common mechanism for a wide variety of products makes it possible, from the manufacturer's point of view, to lower manufacturing costs and reduce the risk of assembly errors by simplifying the manufacturing process.

Par ailleurs, des auxiliaires sont couramment employés en association avec de tels coupe-circuits. Ces auxiliaires s'emboîtent sur les coupe-circuits de sorte à s'y relier mécaniquement pour détecter le déclenchement du coupe-circuit. Ces auxiliaires doivent bien sûr être adaptés au mécanisme de serrure du coupe-circuit auquel ils sont rattachés. L'invention permet donc, de plus, d'employer une gamme unique d'auxiliaires, adaptés au présent mécanisme de serrure, pour une grande variété de coupe-circuits.In addition, auxiliaries are commonly employed in association with such circuit breakers. These auxiliaries fit on the circuit breakers so as to connect mechanically to detect the triggering of the circuit breaker. These auxiliaries must of course be adapted to the lock mechanism of the circuit breaker to which they are attached. The invention thus allows, in addition, to employ a unique range of auxiliaries, adapted to the present lock mechanism, for a wide variety of circuit breakers.

On notera que le document EP 0 224 396 décrit un mécanisme de serrure pour coupe-circuit automatique de sécurité comportant un levier intermédiaire présentant une surface d'arrêt et dans lequel, lorsque le levier d'accrochage est dans sa position stable, la surface d'accrochage et la surface d'arrêt délimitent un logement à parois convergentes formant la butée contre laquelle est sollicitée l'extrémité d'accrochage de la manette articulée.It will be noted that the document EP 0 224 396 describes a lock mechanism for an automatic safety cut-off device comprising an intermediate lever having a stop surface and in which, when the attachment lever is in its stable position, the surface The hooking and the stop surface delimit a housing with convergent walls forming the abutment against which the attachment end of the articulated lever is urged.

Toutefois, dans le mécanisme décrit par EP 0 224 396, il n'existe aucun ressort de mécanisme sollicitant le levier d'accrochage à pivoter autour de son axe dans un sens prédéterminé ; et il n'existe pas davantage de moyens de maintien du levier d'accrochage dans une position stable.However, in the mechanism described in EP 0 224 396, there is no mechanism spring urging the attachment lever to rotate around its axis in a predetermined direction; and there is no further means for maintaining the engaging lever in a stable position.

De préférence, la surface d'accrochage du levier d'accrochage est formée d'une portion de cylindre centrée sur l'axe de pivotement du levier d'accrochage.Preferably, the attachment surface of the engaging lever is formed of a cylinder portion centered on the pivot axis of the engaging lever.

La résultante des efforts de contact sur une telle surface passe, mathématiquement parlant, par l'axe de rotation et est une manière de mettre en oeuvre les principes exposés précédemment.The resultant of the contact forces on such a surface passes, mathematically speaking, by the axis of rotation and is a way of implementing the principles described above.

De même, l'extrémité d'accrochage de la manette articulée peut être formée d'une portion de cylindre centrée sur un axe parallèle à l'axe de pivotement du levier d'accrochage.Similarly, the hooking end of the articulated lever may be formed of a cylinder portion centered on an axis parallel to the pivot axis of the engaging lever.

Le contact linéique de l'extrémité d'accrochage sur la surface d'accrochage, ainsi procuré, concourt à s'affranchir des phénomènes de frottement parasites.The linear contact of the attachment end on the hooking surface, thus procured, helps to overcome parasitic friction phenomena.

Selon des caractéristiques préférées de l'invention :

  • le levier d'accrochage comporte une première surface de contact et une deuxième surface de contact, cette dernière étant sollicitée par le ressort de mécanisme pour la rotation du levier d'accrochage autour de son axe ; et éventuellement
  • la première surface de contact et la deuxième surface de contact sont disposées chacune de part et d'autre de l'axe de pivotement du levier d'accrochage, et les moyens de maintien comportent un appui situé à une extrémité de la béquille et qui, lorsque le mécanisme est dans sa position de contact, est disposé contre ladite première surface de contact.
According to preferred features of the invention:
  • the attachment lever comprises a first contact surface and a second contact surface, the latter being biased by the mechanism spring for the rotation of the coupling lever about its axis; and eventually
  • the first contact surface and the second contact surface are each disposed on either side of the pivot axis of the coupling lever, and the holding means comprise a support located at one end of the stand and which, when the mechanism is in its contact position, is disposed against said first contact surface.

Le déclenchement a lieu lorsque l'actionneur agit sur les moyens de maintien pour écarter ledit appui de la première surface de contact.Triggering occurs when the actuator acts on the holding means to move said support away from the first contact surface.

Dans ce contexte, la force nécessaire à cette manoeuvre dépend directement, et quasi uniquement, de la force exercée par le ressort de mécanisme. La charge appliquée par le ressort définit l'effort de déverrouillage vu par l'actionneur.In this context, the force required for this maneuver depends directly and almost exclusively on the force exerted by the mechanism spring. The load applied by the spring defines the unlocking force seen by the actuator.

De plus, cet effort de déverrouillage présente une faible dispersion parmi les mécanismes produits, le ressort de mécanisme pouvant avoir, de conception, une tolérance réduite d'où une marge de sécurité plus importante.In addition, this unlocking effort has a low dispersion among the mechanisms produced, the mechanism of the spring may have a reduced design tolerance, resulting in a greater margin of safety.

De préférence, le mécanisme comporte en outre un ressort de polarisation coopérant avec le levier d'accrochage et avec la béquille de manière que ladite béquille soit sollicitée vers le levier d'accrochage.Preferably, the mechanism further comprises a biasing spring cooperating with the attachment lever and with the stand so that said stand is biased towards the engaging lever.

Ce ressort de polarisation permet un fonctionnement sûr du mécanisme dans la mesure où ladite béquille va en permanence avoir tendance à rejoindre la première surface pour le maintien du levier d'accrochage.This biasing spring allows a safe operation of the mechanism insofar as said stand will permanently tend to reach the first surface for maintaining the attachment lever.

Pour des raisons de sûreté de fonctionnement et de commodité de réalisation, les caractéristiques préférées suivantes peuvent être envisagées, indépendamment les unes des autres :

  • les moyens de maintien comportent un levier auxiliaire monté pivotant autour d'un axe porté par le levier intermédiaire, ce levier auxiliaire comportant, à l'une de ses extrémités, ladite béquille ; et un levier de déclenchement monté pivotant autour d'un axe fixe par rapport au bâti et adapté à coopérer avec l'actionneur ainsi qu'avec le levier auxiliaire, de sorte à écarter la béquille de la première surface de contact lorsque l'actionneur passe de sa position rentrée à sa position sortie ;
  • le ressort de mécanisme est un ressort de torsion comportant un enroulement cylindrique de spires ainsi que deux branches saillantes, l'enroulement cylindrique de spires étant centré sur l'axe de pivotement du levier intermédiaire, tandis que, lorsque le mécanisme est dans sa position de contact, l'une des branches prend appui sur ladite deuxième surface de contact et l'autre branche prend appui sur une tige d'arrêt fixe par rapport au bâti ;
  • le levier auxiliaire comporte, réparties de part et d'autre de son axe de pivotement, ladite béquille et une branche présentant une portion d'extrémité en arc de cercle adaptée à coopérer avec le levier de déclenchement ;
  • le levier de déclenchement comporte deux branches formant un angle entre elles et se rejoignant à l'axe de pivotement du levier de déclenchement, la première de ces branches présentant une portion disposée en vis-à-vis de l'actionneur et la deuxième de ces branches comportant une portion arrondie destinée à coopérer avec le levier auxiliaire ;
  • les moyens de maintien comportent un doigt de réarmé adapté à être sollicité par le ressort de mécanisme lorsque le mécanisme est hors de sa position de contact, le doigt de réarmé permettant au ressort de mécanisme de faire passer l'actionneur de sa position sortie à sa position rentrée ;
  • le levier de déclenchement comporte un doigt de réarmé situé à l'extrémité de la première branche, au-delà de la portion en vis-à-vis de l'actionneur, et adapté à être sollicité par le ressort de mécanisme lorsque le mécanisme est hors de sa position de contact, le doigt de réarmé permettant au ressort de mécanisme de ramener la première branche contre l'actionneur pour mettre ce dernier en position rentrée ;
  • le mécanisme comporte en outre un ressort de réarmé adapté à solliciter les moyens de maintien lorsque le mécanisme est hors de sa position de contact, le ressort de réarmé permettant de faire passer l'actionneur de sa position sortie à sa position rentrée ;
  • le mécanisme comporte en outre un ressort de réarmé adapté à solliciter le levier de déclenchement lorsque le mécanisme est hors de sa position de contact, le ressort de réarmé permettant de ramener la première branche contre l'actionneur pour mettre ce dernier en position rentrée :
  • le levier intermédiaire comporte une rampe adaptée à recevoir l'extrémité d'accrochage de la manette articulée, ladite surface d'arrêt étant disposée à l'entrée de ladite rampe ;
  • le mécanisme comporte en outre un pion d'arrêt rattaché au levier intermédiaire et adapté à limiter l'amplitude angulaire du pivotement du levier d'accrochage par rapport au levier intermédiaire ;
  • la manette articulée comporte un levier manuel destiné à faire saillie du boîtier du coupe-circuit pour être manipulable de l'extérieur ainsi qu'une biellette rattachée par une articulation audit levier et présentant à son extrémité opposée à l'articulation, ladite extrémité d'accrochage ;
  • le contact mobile comporte un support monté pivotant sur un axe fixe par rapport au bâti et le mécanisme comporte en outre une biellette reliant le levier intermédiaire et le contact mobile pour permettre la commande du dispositif de contact par le levier intermédiaire ;
  • l'actionneur est un vérin électromécanique.
For reasons of operational safety and convenience of production, the following preferred features can be envisaged, independently of one another:
  • the holding means comprise an auxiliary lever mounted pivoting about an axis carried by the intermediate lever, the auxiliary lever having, at one of its ends, said stand; and a trigger lever pivotally mounted about a fixed axis relative to the frame and adapted to cooperate with the actuator and with the auxiliary lever, so as to move the stand off the first contact surface when the actuator passes from its retracted position to its extended position;
  • the mechanism spring is a torsion spring comprising a cylindrical winding of turns and two projecting branches, the cylindrical winding of turns being centered on the pivot axis of the intermediate lever, whereas, when the mechanism is in its position of contact, one of the branches bears on said second contact surface and the other branch is supported on a fixed stop rod relative to the frame;
  • the auxiliary lever comprises, distributed on either side of its pivot axis, said stand and a leg having an arcuate end portion adapted to cooperate with the trigger lever;
  • the trip lever comprises two branches forming an angle between them and joining the pivot axis of the trip lever, the first of these branches having a portion disposed vis-à-vis the actuator and the second of these branches having a rounded portion for cooperating with the auxiliary lever;
  • the holding means comprise a reset finger adapted to be biased by the mechanism spring when the mechanism is out of its contact position, the reset finger allowing the mechanism spring to move the actuator from its extended position to its retracted position;
  • the trip lever comprises a reset finger located at the end of the first branch, beyond the portion vis-à-vis the actuator, and adapted to be biased by the mechanism spring when the mechanism is out of its contact position, the reset finger allowing the mechanism spring to bring the first leg against the actuator to put the latter in the retracted position;
  • the mechanism further comprises a reset spring adapted to urge the holding means when the mechanism is out of position contact, the reset spring for moving the actuator from its extended position to its retracted position;
  • the mechanism further comprises a reset spring adapted to urge the release lever when the mechanism is out of its contact position, the reset spring for bringing the first leg against the actuator to put the latter in the retracted position:
  • the intermediate lever comprises a ramp adapted to receive the hooking end of the articulated lever, said stop surface being disposed at the inlet of said ramp;
  • the mechanism further comprises a stop pin attached to the intermediate lever and adapted to limit the angular amplitude of the pivoting of the engaging lever relative to the intermediate lever;
  • the articulated lever comprises a manual lever intended to protrude from the casing of the circuit-breaker so as to be manipulable from the outside as well as a connecting rod attached by an articulation to said lever and having at its end opposite to the articulation, said end of hanging;
  • the movable contact comprises a support pivotally mounted on a fixed axis relative to the frame and the mechanism further comprises a connecting rod connecting the intermediate lever and the movable contact to allow the control of the contact device by the intermediate lever;
  • the actuator is an electromechanical actuator.

L'exposé de l'invention sera maintenant poursuivi par la description d'un exemple préféré de réalisation, donné ci-après à titre illustratif et non limitatif, en référence aux dessins annexés. Sur ceux-ci :

  • la figure 1 est un schéma cinématique représentant les diverses pièces d'un mécanisme de serrure conforme à l'invention, ainsi que les modes de coopération entre ces pièces, le mécanisme étant dans sa position de contact ;
  • la figure 2 est une vue similaire à la figure 1, le mécanisme étant dans une position déclenchée, immédiatement après l'intervention de l'actionneur ;
  • la figure 3 est une vue similaire à la figure 1, le mécanisme étant dans une position où, chronologiquement après la position de la figure 2, le mécanisme a réarmé l'actionneur et est prêt à passer à sa position de contact si l'utilisateur agit sur la manette ;
  • la figure 4 est une vue agrandie de l'encart repéré XIII sur la figure 1 et montrant schématiquement l'orientation des forces mises en jeu ;
  • la figure 5 est une vue en coupe d'un mécanisme de serrure conforme au mode de réalisation des figures 1 à 4, le mécanisme étant dans une position correspondant à celle de la figure 1 ;
  • la figure 6 est une vue du mécanisme de la figure 5, le mécanisme venant juste d'être déclenché :
  • la figure 7 est une vue du mécanisme de la figure 5, le mécanisme étant dans une position où, chronologiquement après la position de la figure 6, les contacts sont écartés, cette position correspondant également à la position de la figure 2 ;
  • la figure 8 est une vue du mécanisme de la figure 5, le mécanisme étant dans une position où, chronologiquement après la position de la figure 7, la manette articulée est revenue à sa position déclenchée, cette position correspondant également à la position de la figure 3 ;
  • la figure 9 est une vue en perspective d'un mécanisme de serrure selon une variante de réalisation de l'invention dans laquelle le mécanisme comporte un ressort spécifique pour le réarmé de l'actionneur, la figure 9 étant prise du côté où ce ressort de réarmé est visible ;
  • les figures 10 à 13 correspondent aux figures 5 à 8 dans le cas de la variante de réalisation de la figure 9.
The disclosure of the invention will now be continued by the description of a preferred embodiment, given below by way of illustration and not limitation, with reference to the accompanying drawings. On these:
  • Figure 1 is a kinematic diagram showing the various parts of a lock mechanism according to the invention, and the modes of cooperation between these parts, the mechanism being in its contact position;
  • Figure 2 is a view similar to Figure 1, the mechanism being in a triggered position, immediately after the intervention of the actuator;
  • FIG. 3 is a view similar to FIG. 1, the mechanism being in a position where, chronologically after the position of FIG. 2, the mechanism has rearmed the actuator and is ready to move to its contact position if the user operates on the controller
  • FIG. 4 is an enlarged view of the inset marked XIII in FIG. 1 and schematically showing the orientation of the forces involved;
  • Figure 5 is a sectional view of a lock mechanism according to the embodiment of Figures 1 to 4, the mechanism being in a position corresponding to that of Figure 1;
  • FIG. 6 is a view of the mechanism of FIG. 5, the mechanism having just been triggered:
  • Figure 7 is a view of the mechanism of Figure 5, the mechanism being in a position where, chronologically after the position of Figure 6, the contacts are spaced apart, this position also corresponding to the position of Figure 2;
  • FIG. 8 is a view of the mechanism of FIG. 5, the mechanism being in a position where, chronologically after the position of FIG. 7, the articulated joystick has returned to its triggered position, this position also corresponding to the position of FIG. 3;
  • Figure 9 is a perspective view of a lock mechanism according to an alternative embodiment of the invention wherein the mechanism comprises a specific spring for the reset of the actuator, Figure 9 being taken from the side where the spring of rearmed is visible;
  • FIGS. 10 to 13 correspond to FIGS. 5 to 8 in the case of the variant embodiment of FIG. 9.

Les figures 1 à 4 sont des vues schématiques destinées à l'exposé des principes de fonctionnement du mécanisme de serrures.Figures 1 to 4 are schematic views for explaining the operating principles of the lock mechanism.

Les figures 5 à 8 sont des vues d'un mécanisme de serrure réel, en coupe, correspondant à une réalisation pratique conforme aux schémas des figures 1 à 4.Figures 5 to 8 are views of a real lock mechanism, in section, corresponding to a practical embodiment according to the diagrams of Figures 1 to 4.

Enfin, les figures 9 à 13 représentent un mécanisme de serrure réel correspondant à la variante de réalisation précitée.Finally, Figures 9 to 13 show a real lock mechanism corresponding to the above embodiment.

En ce qui concerne le fonctionnement du mécanisme, il sera exposé aussi bien en référence aux figures 1 à 4 que, parallèlement, aux figures 5 à 8, les pièces correspondantes portant le même numéro de référence.As regards the operation of the mechanism, it will be exposed as well with reference to Figures 1 to 4 that, in parallel, to Figures 5 to 8, the corresponding parts with the same reference number.

Le mécanisme visible sur ces figures est destiné à être monté dans un boîtier non représenté.The mechanism visible in these figures is intended to be mounted in a housing not shown.

II comporte une paire de contacts 1, 2 dont l'un 1 est fixe et l'autre 2 est mobile. Chacun de ces contacts 1, 2 est destiné à être relié au circuit électrique (non représenté) que l'on souhaite protéger, leur mise en contact fermant le circuit et leur écartement mutuel ouvrant, au contraire, le circuit.It comprises a pair of contacts 1, 2 of which one is fixed and the other 2 is movable. Each of these contacts 1, 2 is intended to be connected to the electrical circuit (not shown) that is to be protected, their contacting closing the circuit and their mutual spacing opening, on the contrary, the circuit.

Seuls deux contacts 1, 2 sont ici représentés, de profil, étant entendu que des paires supplémentaires de contacts viendraient s'aligner avec la paire décrite dans le cas où l'on voudrait commander simultanément la coupure de différents circuits ou de différentes phases d'un même circuit.Only two contacts 1, 2 are here shown in profile, it being understood that additional pairs of contacts would be aligned with the pair described in the case where it would be desired to simultaneously control the cut of different circuits or different phases of the same circuit.

Les contacts 1, 2 sont par ailleurs sollicités pour s'écarter l'un de l'autre par un ressort d'ouverture 34 (schématisé sur les figures 1 à 3 par une flèche de couple).The contacts 1, 2 are also biased to move away from each other by an opening spring 34 (shown schematically in Figures 1 to 3 by a torque arrow).

C'est le mécanisme de serrure qui va assurer la commande des contacts 1, 2.It is the lock mechanism that will ensure the control of the contacts 1, 2.

Il comporte une manette articulée 3 formée d'un levier manuel 4 monté tournant sur un axe 5 fixe par rapport au boîtier, ce dernier jouant ici le rôle d'un bâti supportant les différents éléments du mécanisme. La manette articulée 3 comporte également une biellette 6 reliée par une liaison pivot au levier manuel 4 de manière que la rotation de ce dernier entraîne le déplacement de la biellette 6. Celle-ci comporte une extrémité d'accrochage 7 représentée par un cercle sur les schémas des figures 1 à 4 et réalisée par un cylindre s'étendant perpendiculairement au plan du dessin sur les figures 5 à 8.It comprises an articulated lever 3 formed of a manual lever 4 rotatably mounted on a fixed axis 5 relative to the housing, the latter here acting as a frame supporting the various elements of the mechanism. The articulated lever 3 also comprises a connecting rod 6 connected by a pivot connection to the manual lever 4 so that the rotation of the latter causes the rod 6 to move. The latter comprises a hooking end 7 represented by a circle on the diagrams of Figures 1 to 4 and made by a cylinder extending perpendicularly to the plane of the drawing in Figures 5 to 8.

La mobilité de la manette articulée 3 lui permet de prendre deux positions extrêmes : une position enclenchée (figures 1 et 5) et une position déclenchée (figures 3 et 8), ces deux positions délimitant une amplitude angulaire d'environ 90° pour le levier manuel 4. Un ressort 13 (matérialisé par une flèche de couple sur les figures 1 à 3) sollicite la manette 3 vers sa position déclenchée.The mobility of the articulated lever 3 allows it to take two extreme positions: an engaged position (FIGS. 1 and 5) and a triggered position (FIGS. 3 and 8), these two positions delimiting an angular amplitude of approximately 90 ° for the lever manual 4. A spring 13 (shown by a torque arrow in Figures 1 to 3) biases the handle 3 to its tripped position.

Le mécanisme comporte de plus un levier intermédiaire 8 en prise indirecte avec le contact mobile 2 par l'intermédiaire d'une biellette 9 articulée à un support 10 portant le contact mobile, le support 10 étant monté tournant autour d'un axe 11 fixe par rapport au boîtier.The mechanism further comprises an intermediate lever 8 in indirect engagement with the movable contact 2 via a link 9 articulated to a support 10 carrying the movable contact, the support 10 being rotatably mounted about an axis 11 fixed by compared to the case.

Le levier intermédiaire 8 est monté tournant autour d'un axe 12 fixe par rapport au boîtier et disposé de telle sorte que le pivotement du levier 8 dans un sens entraîne le contact mobile 2 contre le contact fixe 1 ou, dans l'autre sens, entraîne le contact mobile 2 à l'écart du contact fixe 1.The intermediate lever 8 is rotatably mounted about an axis 12 fixed relative to the housing and arranged so that the pivoting of the lever 8 in one direction causes the movable contact 2 against the fixed contact 1 or, in the other direction, causes the movable contact 2 away from the fixed contact 1.

Le levier intermédiaire 8 comporte de plus une rampe 14 disposée à son extrémité opposée à la biellette 9, cette rampe 14 permettant de recevoir et de guider l'extrémité d'accrochage 7 de la biellette 6.The intermediate lever 8 further includes a ramp 14 disposed at its end opposite the link 9, this ramp 14 for receiving and guiding the attachment end 7 of the rod 6.

A l'entrée de la rampe 14, le levier intermédiaire 8 comporte un logement formé d'une surface d'arrêt 15 et d'une paroi latérale 16, ce logement pouvant recevoir partiellement l'extrémité d'accrochage 7.At the entrance to the ramp 14, the intermediate lever 8 comprises a housing formed of a stop surface 15 and a side wall 16, this housing being able to partially receive the hooking end 7.

De plus, le levier intermédiaire 8 supporte un axe 17, à proximité de la rampe 14, sur lequel est monté tournant un levier d'accrochage 18. Ce dernier comporte une première surface de contact 19 et une deuxième surface de contact 20 disposées de part et d'autre de l'axe 17, ainsi qu'une dent 21 présentant une surface d'accrochage 22. La surface d'accrochage 22 est une portion de cylindre dont l'axe est confondu avec l'axe de pivotement 17 du levier d'accrochage 18.In addition, the intermediate lever 8 supports an axis 17, near the ramp 14, which is rotatably mounted a latching lever 18. The latter comprises a first contact surface 19 and a second contact surface 20 arranged from and other of the axis 17, and a tooth 21 having a hooking surface 22. The hooking surface 22 is a cylinder portion whose axis coincides with the pivot axis 17 of the lever hanging 18.

Un ressort de mécanisme, ici un ressort de torsion 38, est disposé autour de l'axe 12 du levier intermédiaire 8 et exerce une force de torsion entre une tige d'arrêt 23 solidaire du boîtier et la deuxième surface de contact 20, lorsque le mécanisme est dans la position des figures 1 et 5.A mechanism spring, here a torsion spring 38, is disposed about the axis 12 of the intermediate lever 8 and exerts a torsion force between a stop rod 23 secured to the housing and the second contact surface 20, when the mechanism is in the position of Figures 1 and 5.

Un pion d'arrêt 24 rattaché au levier intermédiaire 8 est prévu pour limiter la course angulaire du levier d'accrochage 18 par rapport au levier intermédiaire 8.A stop pin 24 attached to the intermediate lever 8 is provided to limit the angular stroke of the engaging lever 18 relative to the intermediate lever 8.

Le levier intermédiaire 8 supporte enfin un axe 25 sur lequel est monté tournant un levier auxiliaire 26 qui comporte une première branche formant une béquille 27 et portant une pointe d'appui 28 destinée à coopérer avec la première surface de contact 19 du levier d'accrochage 18. Un ressort de polarisation 35 est par ailleurs prévu pour solliciter la pointe d'appui 28 vers ladite première surface de contact 19.The intermediate lever 8 finally supports an axis 25 on which is rotated an auxiliary lever 26 which comprises a first branch forming a stand 27 and carrying a support pin 28 intended to cooperate with the first contact surface 19 of the hooking lever 18. A spring of bias 35 is further provided to bias the support tip 28 towards said first contact surface 19.

Le levier auxiliaire 26 comporte également une deuxième branche 29 destinée à coopérer avec un levier de déclenchement 30.The auxiliary lever 26 also comprises a second branch 29 intended to cooperate with a trip lever 30.

La première branche 27 et la deuxième branche 29 sont disposées de part et d'autre de l'axe 25 du levier auxiliaire 26.The first branch 27 and the second branch 29 are disposed on either side of the axis 25 of the auxiliary lever 26.

Le levier de déclenchement 30 est monté tournant autour d'un axe 31 fixe par rapport au boîtier et comporte une première branche 32 et une deuxième branche 33 formant ici un angle d'environ 90°, la deuxième branche ayant un coin arrondi pour sa coopération avec la deuxième branche 29 du levier auxiliaire 26.The release lever 30 is rotatably mounted about a fixed axis 31 relative to the housing and comprises a first branch 32 and a second branch 33 forming here an angle of about 90 °, the second branch having a rounded corner for its cooperation with the second branch 29 of the auxiliary lever 26.

Le levier de déclenchement 30 peut être mis en mouvement par un vérin électromécanique 36 fixe par rapport au boîtier et qui admet une position rentrée (figures 1 et 5) et une position sortie (figures 2 et 6), le passage de la position rentrée à la position sortie s'effectuant en alimentant électriquement le vérin 36 lors de la détection du défaut électrique qui doit causer le déclenchement du mécanisme.The trip lever 30 can be set in motion by an electromechanical actuator 36 fixed relative to the housing and which has a retracted position (FIGS. 1 and 5) and an extended position (FIGS. 2 and 6), the passage from the retracted position to the output position being effected by electrically feeding the jack 36 when the electrical fault which causes the triggering of the mechanism is detected.

Le levier auxiliaire 26 et le levier de déclenchement 30 forment des moyens de maintien pouvant de cette manière être mis en mouvement par le vérin 36.The auxiliary lever 26 and the release lever 30 form holding means that can thereby be set in motion by the jack 36.

La tige du vérin 36 agit sur la première branche 32 du levier de déclenchement 30. Sur ladite première branche 32, au-delà de la portion destinée au contact avec la tige de vérin 36, est prévu un doigt de réarmé 37 s'étendant perpendiculairement au plan des dessins et qui est destiné à coopérer avec le ressort de mécanisme 38.The rod of the jack 36 acts on the first leg 32 of the release lever 30. On said first leg 32, beyond the portion intended for contact with the jack rod 36, there is provided a resetting finger 37 extending perpendicularly. in the drawings and which is intended to cooperate with the mechanism spring 38.

En effet, lorsque le mécanisme est dans la position des figures 1 et 5, le ressort 38 exerce une force d'écartement angulaire entre la tige d'arrêt 23 et la deuxième surface de contact 20 du levier d'accrochage 18.Indeed, when the mechanism is in the position of Figures 1 and 5, the spring 38 exerts an angular spacing force between the stop rod 23 and the second contact surface 20 of the attachment lever 18.

Tandis que, lorsque le mécanisme est dans la position des figures 2 et 7, le ressort 38 exerce cette fois-ci une force entre la tige d'arrêt 23 et le doigt de réarmé 37 dans la mesure où, dans cette position, le doigt de réarmé se situe en-deçà du niveau où se trouve la deuxième surface de contact 20.While, when the mechanism is in the position of Figures 2 and 7, the spring 38 this time exerts a force between the stop rod 23 and the resetting finger 37 to the extent that, in this position, the finger rearmed is below the level where the second contact surface 20 is located.

Le mécanisme de serrure qui vient d'être décrit fonctionne de la manière indiquée ci-après.The lock mechanism which has just been described operates as indicated below.

Le mécanisme tel qu'il est montré dans ses figures 1 et 5 est dans sa position de contact. Pour l'amener dans cette position, à partir généralement d'une position déclenchée telle que représentée aux figures 3 et 8, il est nécessaire d'enclencher le mécanisme en actionnant le levier manuel 4 (qui est le seul élément du mécanisme à faire saillie du boîtier) de sa position déclenchée à sa position enclenchée.The mechanism as shown in Figures 1 and 5 is in its contact position. To bring it into this position, generally from a triggered position as shown in Figures 3 and 8, it is necessary to engage the mechanism by operating the manual lever 4 (which is the only element of the mechanism to protrude of the housing) from its triggered position to its engaged position.

La rotation du levier manuel 4 entraîne la biellette 6 à venir disposer son extrémité d'accrochage 7 contre une butée 39 formée par la convergence des surfaces d'arrêt 15 et d'accrochage 22.The rotation of the manual lever 4 causes the connecting rod 6 to have its catching end 7 against a stop 39 formed by the convergence of the stop surfaces 15 and hooking surfaces 22.

L'extrémité d'accrochage 7 glisse ainsi, au fur et à mesure de la rotation du levier manuel 4, dans l'entonnoir formé par la butée 39 jusqu'à prendre une position où il est en contact franc aussi bien avec la surface d'arrêt 15 qu'avec la surface d'accrochage 22. A partir de ce moment, la poursuite de la rotation du levier manuel 4 entraîne le pivotement du levier intermédiaire 8 et, par conséquent, le rapprochement des contacts 1,2.The hooking end 7 thus slips, as and when the manual lever 4 is rotated, in the funnel formed by the stop 39 to take up a position where it is in direct contact with both the surface of the 15 only with the hooking surface 22. From this moment, the further rotation of the manual lever 4 causes the pivoting of the intermediate lever 8 and, consequently, the bringing together of the contacts 1, 2.

Parallèlement, le levier auxiliaire 26 est sollicité par le ressort de polarisation 35 pour venir au contact de la première surface de contact 19 du levier d'accrochage 18.In parallel, the auxiliary lever 26 is biased by the bias spring 35 to come into contact with the first contact surface 19 of the attachment lever 18.

Du fait du pivotement du levier intermédiaire 8 et, par conséquent de la deuxième surface de contact 20 du levier d'accrochage 18, celle-ci va venir au contact du ressort de mécanisme 38 et, au fur et à mesure de la rotation, va libérer le doigt de réarmé 37 de la contrainte du ressort 38.Due to the pivoting of the intermediate lever 8 and, consequently, of the second contact surface 20 of the attachment lever 18, the latter will come into contact with the mechanism spring 38 and, as the rotation proceeds, releasing the reset finger 37 from the stress of the spring 38.

Le ressort de mécanisme 38 va ainsi se charger jusqu'à ce que le mécanisme ait atteint la position stable, de contact, des figures 1 et 5 dans lesquelles la biellette 9 est arc-boutée.The mechanism spring 38 will thus load until the mechanism has reached the stable contact position of Figures 1 and 5 in which the link 9 is buttressed.

Dans cette position, les forces exercées par l'extrémité d'accrochage 7 sur la butée 39 sont détaillées à la figure 4.In this position, the forces exerted by the attachment end 7 on the abutment 39 are detailed in FIG.

Une première composante F1 est appliquée à la surface d'accrochage 22 et une seconde composante F2 est appliquée à la surface d'arrêt 15.A first component F 1 is applied to the hooking surface 22 and a second component F 2 is applied to the stop surface 15.

Quelle que soit la position d'équilibre qu'a atteint l'extrémité d'accrochage lors de son enfoncement dans la butée 39, elle ne pourra transmettre qu'une composante F1 selon une direction passant par l'axe 17 du levier d'accrochage 18, du fait de la forme circulaire centrée sur cet axe 17 de la surface d'accrochage 22. Les autres directions de force seront transmises par la composante F2.Whatever the equilibrium position reached by the attachment end when it is driven into the abutment 39, it can only transmit a component F 1 in a direction passing through the axis 17 of the lever. hanging 18, because of the circular shape centered on this axis 17 of the hooking surface 22. The other force directions will be transmitted by the component F2 .

L'extrémité d'accrochage 7 n'exerce ainsi aucun couple tendant à faire tourner le levier d'accrochage, seul l'axe 17 lui-même subit un effort.The attachment end 7 thus exerts no torque tending to rotate the latching lever, only the axis 17 itself undergoes an effort.

Lors de l'apparition d'un défaut électrique, le vérin 36 va se mettre en position sortie (voir figure 6), entraînant le pivotement du levier de déclenchement 30 et donc le pivotement du levier auxiliaire 26.When an electrical fault occurs, the jack 36 will move into the extended position (see FIG. 6), causing the trigger lever 30 to pivot and thus the auxiliary lever 26 to pivot.

Ceci a pour conséquence, sous l'effet du ressort de mécanisme 38, d'écarter la dent 21 de l'entrée de la rampe 14 et de permettre au levier intermédiaire 8 de pivoter sous l'effet du ressort d'ouverture 34, quelle que soit la position du levier manuel 4 puisque l'extrémité d'accrochage peut désormais se positionner dans la rampe 14 (voir figures 2 et 7). Les contacts 1,2 sont ainsi écartés et le circuit électrique ouvert.This has the consequence, under the effect of the mechanism spring 38, to move the tooth 21 from the inlet of the ramp 14 and to allow the intermediate lever 8 to pivot under the effect of the opening spring 34, which whatever the position of the manual lever 4 since the hooking end can now be positioned in the ramp 14 (see Figures 2 and 7). The contacts 1.2 are thus discarded and the electrical circuit open.

La phase suivante voit le ressort de mécanisme 38 agir sur le doigt de réarmé 37 pour ramener le vérin 36 à sa position rentrée, et le ressort 13 sollicite la manette 3 vers sa position déclenchée en entraînant l'extrémité d'accrochage 7 à sortir de la rampe 14 pour se positionner à l'entrée de la butée 39, prête pour un nouvel enclenchement (figures 3 et 8).The next phase sees the mechanism spring 38 act on the resetting finger 37 to return the jack 36 to its retracted position, and the spring 13 biases the lever 3 towards its triggered position by driving the hooking end 7 out of position. the ramp 14 to be positioned at the entrance of the stop 39, ready for a new engagement (Figures 3 and 8).

Les figures 9 à13 représentent une variante du mécanisme de serrure décrit.Figures 9 to 13 show a variant of the lock mechanism described.

Le mécanisme selon cette variante est en tout point identique au précédent à l'exception du réarmé du vérin 36 qui ne se fait pas par le ressort de mécanisme 38 agissant sur un doigt de réarmé 37 mais par un ressort de réarmé 40 spécifique. Celui-ci, visible à la figure 9 qui représente le mécanisme vu de l'autre côté, sollicite un mouvement angulaire d'écartement entre l'extrémité de la deuxième branche 33 du levier de déclenchement 30 et le levier intermédiaire 8.The mechanism according to this variant is in all respects identical to the previous except for the reset of the cylinder 36 which is not done by the mechanism spring 38 acting on a reset finger 37 but by a reset spring 40 specific. This, visible in FIG. 9, which represents the mechanism seen on the other side, solicits an angular movement of separation between the end of the second branch 33 of the trip lever 30 and the intermediate lever 8.

Une butée d'arrêt 41 est de plus prévue pour limiter la course du ressort de mécanisme 38.A stopper 41 is further provided to limit the stroke of the mechanism spring 38.

Une autre variante non représentée concerne le déclenchement qui est réalisé par un auxiliaire externe au mécanisme et qui agit directement en rotation sur le levier auxiliaire 26. Le vérin 36 et le levier de déclenchement 30 peuvent ainsi être supprimés.Another variant not shown is the triggering which is performed by an auxiliary external to the mechanism and which acts directly in rotation on the auxiliary lever 26. The cylinder 36 and the trip lever 30 can thus be eliminated.

Claims (19)

  1. Rotary engagement lock mechanism for automatic safety cutout, including:
    - a frame;
    - a hinged release bar (3) mounted to pivot on a pivot (5) fixed relative to the frame and having an engagement end (7), said release bar (3) having a set position and a tripped position and being urged by a spring (13) towards its tripped position;
    - an intermediate lever (8) mounted to pivot on a pivot (12) fixed relative to the frame and adapted to co-operate with the engagement end (7) of the hinged release bar (3);
    - an engagement lever (18) mounted to pivot on a pivot (17) carried by the intermediate lever (8) and having an engagement surface (22) adapted to co-operate with the engagement end (7) of the hinged release bar (3);
    - a mechanism spring (38) adapted to urge said engagement lever (18) to pivot about its axis (17) in a predetermined direction;
    - a contact device including at least one fixed contact (1) and at least one corresponding mobile contact (2), this device having a first position in which the fixed contact (1) and the mobile contact (2) are moved apart from each other and a second position in which the fixed contact (1) and the mobile contact (2) are held against each other, movement from the first position to the second position being driven by the intermediate lever (8);
    - holding means (26, 30) adapted to hold the engagement lever (18) in a stable position, including a strut (27) against which said engagement lever (18) is adapted to be pressed by said mechanism spring (38);
    - an actuator (36) having a retracted position in which it is set back relative to the holding means (26, 30) and an extended position in which it operates on the holding means (26, 30);
    said mechanism having a contact position in which the hinged release bar (3), in its set position, is braced to urge said engagement end (7) against an abutment (39) formed conjointly by the engagement surface (22) of the engagement lever (18) in its stable position and the intermediate lever (8), and thus urges the intermediate lever (8) to hold the contact device in its second position;
    the mechanism being characterised in that the intermediate lever (8) has a stop surface (15) and in that, when the engagement lever (18) is in its stable position, the engagement surface (22) and the stop surface (15) delimit a housing with convergent walls forming said abutment (39) against which the engagement end (7) of the hinged release bar (3) is urged, in that the engagement surface (22) being shaped so that anywhere on the engagement surface (22) the normal to that surface (22) is oriented in a direction intersecting the pivot (17) of the engagement lever (18).
  2. Lock mechanism according to claim 1, characterised in that the engagement surface (22) of the engagement lever (18) is formed of a portion of a cylinder centred on the pivot (17) of the engagement lever (18).
  3. Lock mechanism according to either claim 1 or claim 2, characterised in that the engagement end (7) of the hinged release bar (3) is formed by a portion of a cylinder centred on a pivot parallel to the pivot (17) of the engagement lever (18).
  4. Lock mechanism according to any one of claims 1 to 3, characterised in that the engagement lever (18) has a first contact surface (19) and a second contact surface (20), the latter being urged by the mechanism spring (38) to rotate the engagement lever (18) about its pivot (17).
  5. Lock mechanism according to claim 4, characterised in that the first contact surface (19) and the second contact surface (20) are disposed on respective opposite sides of the pivot (17) of the engagement lever (18) and the holding means (26, 30) include a rest (28) situated at one end of the strut (27) and which, when the mechanism is in its contact position, is disposed against said first contact surface (19).
  6. Lock mechanism according to any one of claims 1 to 5, characterised in that the mechanism further includes a bias spring (35) adapted to co-operate with the engagement lever (18) and with the strut (27) so that said strut (27) is urged towards the engagement lever (18).
  7. Lock mechanism according to any one of claims 4 to 6, characterised in that the holding means include:
    - an auxiliary lever (26) mounted to pivot about a pivot (25) carried by the intermediate lever (8), this auxiliary lever (26) having said strut (27) at one of its ends;
    - a tripping lever (30) mounted to pivot about a pivot (31) fixed relative to the frame and adapted to co-operate with the actuator (36) and with the auxiliary lever (26) so as to move the strut (27) away from the first contact surface (19) when the actuator (36) goes from its retracted position to its extended position.
  8. Lock mechanism according to any one of claims 4 to 7, characterised in that the mechanism spring (38) is a torsion spring comprising a cylindrical winding of turns and two projecting branches, the cylindrical winding of turns being centred on the pivot (12) of the intermediate lever (8), and, when the mechanism is in its contact position, one of the branches bears on said second contact surface (20) and the other branch bears on a stop rod (23) fixed relative to the frame.
  9. Lock mechanism according to either claim 7 or claim 8, characterised in that the auxiliary lever (26) includes, distributed on either side of its pivot axis (25), said strut (27) and a branch (29) having an end portion adapted to co-operate with the tripping lever (30).
  10. Lock mechanism according to any one of claims 7 to 9, characterised in that the tripping lever (30) has two branches (32, 33) at an angle to each other and intersecting the pivot (31) of the tripping lever (30), the first branch (32) having a portion facing the actuator (36) and the second branch (33) having a rounded portion adapted to co-operate with the auxiliary lever (26).
  11. Lock mechanism according to any one of claims 1 to 10, characterised in that the holding means (26, 30) include a reset finger (37) adapted to be urged by the mechanism spring (38) when the mechanism is not in its contact position, the reset finger (37) being adapted to enable the mechanism spring (38) to move the actuator (36) from its extended position to its retracted position.
  12. Lock mechanism according to claim 10, characterised in that the tripping lever (30) includes a reset finger (37) situated at the end of the first branch (32), beyond the portion facing the actuator (36), and adapted to be loaded by the mechanism spring (38) when the mechanism is not in its contact position, the reset finger (37) being adapted to enable the mechanism spring (38) to return the first branch (32) against the action of the actuator (36) to move the latter to the retracted position.
  13. Lock mechanism according to any one of claims 1 to 10, characterised in that the mechanism further includes a reset spring (40) adapted to urge the holding means (26, 30) when the mechanism is not in its contact position, the reset spring (40) being adapted to enable the actuator (36) to be moved from its extended position to its retracted position.
  14. Lock mechanism according to claim 10, characterised in that the mechanism further includes a reset spring (40) adapted to load the tripping lever (30) when the mechanism is not in its contact position, the reset spring (40) being adapted to enable the first branch (32) to be moved against the actuator (36) to move the latter to its retracted position.
  15. Lock mechanism according to any one of claims 1 to 14, characterised in that the intermediate lever (8) includes a ramp (14) adapted to receive the engagement end (7) of the hinged release bar (3), said stop surface (15) being disposed at the entry end of said ramp (14).
  16. Lock mechanism according to any one of claims 1 to 15, characterised in that the mechanism further includes a stop peg (24) attached to the intermediate lever (8) and adapted to limit the angular amplitude of pivoting of the engagement lever (18) relative to the intermediate lever (8).
  17. Lock mechanism according to any one of claims 1 to 16, characterised in that the hinged release bar (3) includes a manual lever (4) adapted to project from the casing of the cutout so that it can be manipulated from the outside and a link (6) hinged to said lever (4) and having said engagement end (7) at its end opposite the hinge.
  18. Lock mechanism according to any one of claims 1 to 17, characterised in that the mobile contact (2) includes a support (10) mounted to pivot on a pivot (11) fixed relative to the frame and in that the mechanism further includes a link (9) connecting the intermediate lever (8) and the mobile contact (2) to enable the intermediate lever (8) to operate the contact device.
  19. Lock mechanism according to any one of claims 1 to 18, characterised in that the actuator (36) is an electromechanical actuator.
EP04767738A 2003-07-24 2004-07-20 Rotary engagement lock mechanism for automatic safety cutout Active EP1649478B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04767738T PL1649478T3 (en) 2003-07-24 2004-07-20 Rotary engagement lock mechanism for automatic safety cutout

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0309065A FR2858109B1 (en) 2003-07-24 2003-07-24 ROTATING HITCH LOCKING MECHANISM FOR AUTOMATIC SAFETY CIRCUIT BREAKER
PCT/FR2004/001920 WO2005010909A1 (en) 2003-07-24 2004-07-20 Rotary engagement lock mechanism for automatic safety cutout

Publications (2)

Publication Number Publication Date
EP1649478A1 EP1649478A1 (en) 2006-04-26
EP1649478B1 true EP1649478B1 (en) 2006-12-27

Family

ID=33561064

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04767738A Active EP1649478B1 (en) 2003-07-24 2004-07-20 Rotary engagement lock mechanism for automatic safety cutout

Country Status (11)

Country Link
EP (1) EP1649478B1 (en)
CN (1) CN100470705C (en)
AT (1) ATE349769T1 (en)
BR (1) BRPI0412220A (en)
CO (1) CO5670332A2 (en)
DE (1) DE602004003949T2 (en)
ES (1) ES2279437T3 (en)
FR (1) FR2858109B1 (en)
PL (1) PL1649478T3 (en)
RU (1) RU2340030C2 (en)
WO (1) WO2005010909A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE443921T1 (en) * 2006-02-03 2009-10-15 Hager Electro Sas SWITCH LOCK WITH MOVABLE ROTARY AXLE
DE102011003801A1 (en) * 2011-02-08 2012-08-09 Siemens Aktiengesellschaft Residual Current Device
CN102254755B (en) * 2011-06-28 2013-10-16 法泰电器（江苏）股份有限公司 Operation mechanism of circuit breaker
CN104465239B (en) * 2013-09-24 2017-04-12 上海电科电器科技有限公司 Interchange type operating mechanism
FR3121274B1 (en) * 2021-03-26 2024-02-02 Schneider Electric Ind Sas Electrical protection device and electrical panel comprising such an electrical protection device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2919917C2 (en) * 1979-05-17 1981-07-30 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Switching mechanism for circuit breakers
FR2589627B1 (en) * 1985-10-31 1988-08-26 Merlin Gerin CONTROL MECHANISM FOR LOW VOLTAGE ELECTRIC CIRCUIT BREAKER
FR2628262B1 (en) * 1988-03-04 1995-05-12 Merlin Gerin CONTROL MECHANISM OF A TRIGGERING AUXILIARY BLOCK FOR MODULAR CIRCUIT BREAKER

Also Published As

Publication number Publication date
RU2006105650A (en) 2006-08-10
ATE349769T1 (en) 2007-01-15
CN1830049A (en) 2006-09-06
CN100470705C (en) 2009-03-18
WO2005010909A1 (en) 2005-02-03
ES2279437T3 (en) 2007-08-16
EP1649478A1 (en) 2006-04-26
DE602004003949D1 (en) 2007-02-08
DE602004003949T2 (en) 2007-10-18
BRPI0412220A (en) 2006-08-22
PL1649478T3 (en) 2007-05-31
CO5670332A2 (en) 2006-08-31
FR2858109B1 (en) 2005-10-14
FR2858109A1 (en) 2005-01-28
RU2340030C2 (en) 2008-11-27

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