EP0524152A1 - Automatic stop device with actuating sleeve for electric motor - Google Patents

Automatic stop device with actuating sleeve for electric motor Download PDF

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Publication number
EP0524152A1
EP0524152A1 EP92810533A EP92810533A EP0524152A1 EP 0524152 A1 EP0524152 A1 EP 0524152A1 EP 92810533 A EP92810533 A EP 92810533A EP 92810533 A EP92810533 A EP 92810533A EP 0524152 A1 EP0524152 A1 EP 0524152A1
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EP
European Patent Office
Prior art keywords
switch
player
rocker
screw
cam
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.)
Granted
Application number
EP92810533A
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German (de)
French (fr)
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EP0524152B1 (en
Inventor
Saegusa Kazuo
Itoh Kazuo
Uchida Hiroshi
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Somfy SA
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Somfy SA
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/02—Details
    • H01H19/10—Movable parts; Contacts mounted thereon
    • H01H19/14—Operating parts, e.g. turn knob
    • H01H19/18—Operating parts, e.g. turn knob adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift
    • H01H19/186—Operating parts, e.g. turn knob adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift with travelling nuts

Definitions

  • the present invention relates to an automatic stop device for an electric motor after a certain number of revolutions, comprising a shaft driven in rotation by the motor and having on its periphery a helical profile linearly driving a sliding sliding mounted on a guide bar parallel to the axis of said shaft and actuating a switch at a determined point in its travel on said helical profile.
  • Such a device is particularly intended for controlling the automatic shutdown of blinds, shutters or doors driven by a geared motor.
  • the helical profile consists of a steel wire wound helically around the shaft and fixed at its ends on two cams integral with the shaft.
  • the helical wire passes through an arm of the player which is thus driven along the propeller.
  • the guide bar of the player is fixed by embedding at one of its ends and the actuation of the switch is done by lateral movement of the player by one of the cams of the shaft, the movement of the player being authorized by bending of its guide bar.
  • the adjustment of this device is relatively long and delicate.
  • the adjustment method is different and a priori the user does not know the upstream / downstream situation of these positions. It is therefore led, in the first place, to carry out some tests to locate these positions.
  • the user In the case where the initial stop positions are upstream of the desired stop positions, the user must, firstly activate the electric motor until it stops automatically at this initial stop position, then cause the propeller and the cam to rotate so as to ensure the closing of the switch, the restarting of the motor and the movement of the windable feed controlled by the motor, the propeller having to be driven manually until the rollable element is in the desired position.
  • the object of the present invention is to provide an automatic stop device allowing rapid, precise and unequivocal adjustment.
  • the automatic stop device is characterized in that said shaft consists of a lead screw and that the player has a profiled part engaged in the lead screw and that the guide bar of the player is mounted on a rocker allowing to move the player away from the mother screw and comprises a spring acting axially on the player so as to instantly bring the player into the position in which it actuates said switch when it is spaced from the mother screw.
  • the switch can be actuated, either by the axial displacement of the player, or by its lateral displacement by a cam secured to the mother screw, the presence of a rocker favoring this second solution.
  • the mother screw is disengageable and the axis of the lever is provided with a radial lever successively ensuring the disengagement of the mother screw and a precise initial positioning determined thereof during of the shaft drive by means of a bistable pusher.
  • the same axis can be used to actuate a shunt switch short-circuiting the stop switch and thus allowing the supply of the motor in the position away from the rocker. All these functions are fulfilled by a simple and compact construction device.
  • Figure 1 is a sectional view along I-I of Figure 2 of an automatic stop device with two lead screws and two players, in an intermediate position of these players.
  • Figure 2 is a sectional view along II-II of Figure 1.
  • FIG. 3 represents the same device with one of the portable devices at the end of the race according to a section III-III of FIG. 4.
  • FIG. 4 is a sectional view along IV-IV of FIG. 3.
  • FIG. 5 shows the same device with one of the portable players in the initial position in a V-V section in FIG. 6.
  • FIG. 6 is a sectional view along VI-VI of FIG. 5.
  • Figure 7 is a sectional view along VII-VII of Figure 5 showing the bistable actuators of the rockers.
  • FIG. 8 represents the electrical diagram for controlling the motor.
  • the device shown comprises a frame 1 in the form of a cradle on which are mounted the various mobile elements of the stop device as well as the switches and the control means.
  • the device comprises two lead screws 2 and 3 mounted coaxially and freely on a common axis 4 and pushed towards each of the ends of this axis by a common helical spring 5 disposed between the lead screws.
  • the end of the mother screw 2 opposite the spring 5 is provided with a toothed crown 6 meshing, under the thrust of the spring 5, with the internal toothing of a crown 7 fixed on the axis 4.
  • the thread of the screw mother 2 is extended behind by a portion of diameter growing in a spiral constituting a cam 8. This cam 8 ends at the rear by a stop 9. Between the crown 6 and the stop 9, the body of the mother screw 2 has a part in the shape of a heart cam 10.
  • the lead screw 3 has a spiral cam 12, a stop 13, a heart cam 14 and a toothed ring 15 meshing, under the thrust of the spring 5, with the internal toothing of a toothed ring 16 fixed on the axis 4 and provided with an external toothing 17 meshing with the output gear of the reduction gear associated with the motor to be controlled.
  • an axis 18 ( Figure 2) on which is mounted a rocker 19 integral in rotation, with a certain angular play, of the axis 18.
  • This rocker 19 is provided with two transverse arms 20 and 21 supporting a cylindrical guide bar 22 on which is freely mounted a circular player 23 provided with an edge 24 engaged in the thread of the lead screw 2.
  • the guide bar 22 is surrounded by a helical spring 25 compressed between the player 23 and the arm 21.
  • the arm 20 of the rocker has, approximately in the extension of the bar 22, a longitudinal arm 26 cooperating with a switch 27 and on which a spring acts 28 now, on the one hand, the player 23 engaged with the mother screw 2 and, on the other hand, the switch 27 actuated. This switch is closed when activated ( Figure 8).
  • a radial arm 29 On the axis 18 of the rocker is also fixed, with an angular clearance, a radial arm 29 having on the one hand a bevel 29a and on the other hand a notch 29b.
  • the arm 29 is positioned on the axis 18 so that when it is rotated in the direction of the mother screw 2, its bevel 29a abuts against the edge 30 of the mother screw by acting on it like a cam pushing the mother screw 2 to the right by compressing the spring 5 and by disengaging the mother screw from the crown 7.
  • the arm 29 comes, by its notch 29b to actuate the heart cam 10 and to position this heart cam in a known manner, for example like the reset hammer of a chronograph.
  • the other lead screw 3 cooperates with identical means designated by the same references accompanied by the sign ′. These means are mounted head to tail relative to the first means, with the exception of the rocker 19 ′ and its arms, the spring 28 ′ and the switch 27 ′ which are located opposite the corresponding elements of the first means.
  • a cam 31 ′ fixed to the end of the axis 18 ′ of the rocker, a cam intended for actuate a switch 32 ′ which short-circuit switch 31 ′ in the actuated position.
  • the axis 18 of the first means is provided with a cam identical to the cam 31 ′, but not visible in the drawing and actuating a shunt switch 32 shown in phantom because not visible in the section.
  • the axes 18 and 18 ′ drive the rockers by a sector-shaped profile with a certain angular play.
  • the arms 29 and 29 ′ are driven in the same way with a small angular play.
  • the role of these games will become clear when describing the operation of the device.
  • pinions 33 and 33 ′ are also fixed ( Figures 5 and 7).
  • the pinion 33 meshes with a rack 34 of a pusher 35 mounted in a housing at the end of the frame 1.
  • This pusher 35 compresses a spring 36 and it laterally has a heart-shaped groove 37 in which the end is engaged bent by a wire spring 38.
  • This well-known arrangement in itself provides two stable positions for the pusher 35, or a depressed position, as shown for the pusher 35 and a non-depressed position, as shown for the corresponding pusher 35 ′.
  • the pushers 35 and 35 ′ therefore make it possible to maintain the two corresponding axes 18 and 18 ′ in two determined positions. We will therefore understand the need for angular play in the drive of the rockers and clutch release arms.
  • the electrical circuit supplying the motor is shown in FIG. 8.
  • the motor M is a direct current motor supplied by a 12V current source via a change-over switch not shown.
  • the switches 27 and 27 ′ are shown in the actuated position and the switches 32 and 32 ′ in the unactuated position. The positions correspond to intermediate positions of the portable players 23 and 23 ′.
  • the switches 27 and 32 are connected in series with a diode D1 and a relay R1, while the switches 27 ′ and 32 ′ are connected in parallel, in series with a diode D3 and a relay R2.
  • Relays R1 and R2 are provided with a change-over contact r1, respectively r2 represented at rest and whose common points c are connected respectively to each of the motor terminals M.
  • a diode D6 In parallel with contact r1 is connected a diode D6 allowing the passage of the current in the motor when contact r1 is in the rest position as shown in the drawing.
  • a diode D5 is connected in parallel to contact r2.
  • the operation of the device is as follows: It is first assumed that the players 23 and 23 'are in any position, for example the position shown in Figure 1. When the engine is running, the two players are each driven by their lead screw in opposite directions. We will admit that players move in the direction of their cam 8 and 8 ′.
  • the first player which mounts on its cam, for example the player 23, drives the rocker 19 which can tilt freely on its axis 18 due to the angular play provided for this purpose.
  • the arm 26 ceases to actuate the contact 27 which opens causing the engine to stop ( Figures 3 and 4).
  • a reverse voltage is then applied to the motor to drive it in the other direction and the adjustment of the other breakpoint is carried out in the same way by means of the push-button 35 ′.
  • the limit switches could be actuated in a direction parallel to the axis of the lead screws.
  • the cams 8 and 8 ′ are not necessary.
  • the means for bistable positioning of the rockers constituted by the pushers 35 and 35 ′, could be eliminated and the rockers kept apart by other means.
  • the actuation cams of portable music players could have another shape.
  • the device could comprise a single lead screw and a single walkman.

Landscapes

  • Transmission Devices (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Lock And Its Accessories (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
  • Switches With Compound Operations (AREA)
  • Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Centrifugal Separators (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

The device comprises at least one lead screw (2) driving a sliding yoke (23) whose guide bar (22) is mounted on a rocker arm (19). The lead screw actuates a switch (27) by means of a cam (28) via the sliding yoke. A deliberate action on the rocker arm moves away the sliding yoke (23) which is brought instantaneously into initial position by a spring (25). The lead screw (2) is for preference disengageable by means of an arm (29) driven by the axle of the sliding yoke. This arm provides an angular positioning of the lead screw by acting on a heart-shaped cam (10). The device permits rapid, sure and precise setting of the stopping points of a motor.

Description

La présente invention a pour objet un dispositif d'arrêt automatique pour moteur électrique après un certain nombre de tours, comprenant un arbre entraîné en rotation par le moteur et présentant sur son pourtour un profil hélicoïdal entraînant linéairement un baladeur monté coulissant sur une barre de guidage parallèle à l'axe dudit arbre et venant actionner un interrupteur en un point déterminé de sa course sur ledit profil hélicoïdal.The present invention relates to an automatic stop device for an electric motor after a certain number of revolutions, comprising a shaft driven in rotation by the motor and having on its periphery a helical profile linearly driving a sliding sliding mounted on a guide bar parallel to the axis of said shaft and actuating a switch at a determined point in its travel on said helical profile.

Un tel dispositif est particulièrement destiné à commander l'arrêt automatique de stores, volets ou portes entraînés par un motoréducteur.Such a device is particularly intended for controlling the automatic shutdown of blinds, shutters or doors driven by a geared motor.

Un tel dispositif est connu du brevet FR 2 386 117. Dans ce dispositif, le profil hélicoïdal est constitué par un fil d'acier enroulé en hélice autour de l'arbre et fixé à ses extrémités sur deux cames solidaires de l'arbre. Le fil en hélice traverse un bras du baladeur qui est ainsi entraîné le long de l'hélice. La barre de guidage du baladeur est fixée par encastrement à l'une de ses extrémités et l'actionnement de l'interrupteur se fait par déplacement latéral du baladeur par l'une des cames de l'arbre, le déplacement du baladeur étant autorisé par la flexion de sa barre de guidage. Le réglage de ce dispositif est relativement long et délicat. En effet, selon que les positions d'arrêt initiales ou pré-réglées sont situées en amont ou en aval des positions d'arrêt souhaitées, la méthode de réglage est différente et à priori l'utilisateur ne connaît pas la situation amont/aval de ces positions. Il est donc amené, en premier lieu, à effectuer quelques essais pour situer ces positions. Dans le cas où les positions d'arrêt initiales sont en amont des positions d'arrêt souhaitées, l'utilisateur doit, premièrement actionner le moteur électrique jusqu'à ce qu'il s'arrête automatiquement à cette position d'arrêt initiale, puis faire entraîner l'hélice et la came en rotation de manière à assurer la fermeture de l'interrupteur, le redémarrage du moteur et le déplacement de l'éliment enroulable commandé par le moteur, l'hélice devant être entraînée manuellement jusqu'à ce que l'élément enroulable soit dans la position souhaitée. Une hystérésis due au temps de réaction de l'utilisateur et des éléments en mouvement est inévitable, ce qui a pour effet de décaler le point d'arrêt effectif et de nécessiter des retouches. Dans le cas où les positions d'arrêt initiales sont en aval des positions d'arrêt souhaitées, l'utilisateur doit tout d'abord actionner le moteur électrique jusqu'à ce que l'élément enroulable soit à la position souhaitée, puis entraîner manuellement l'hélice en rotation de manière à amener la came en contact avec l'interrupteur pour couper l'alimentation du moteur. Cette dernière opération ne peut se faire que par tâtonnement, c'est-à-dire en répétant ces opérations jusqu'à ce que la mise sous tension du moteur ne provoque plus la rotation du moteur.Such a device is known from patent FR 2 386 117. In this device, the helical profile consists of a steel wire wound helically around the shaft and fixed at its ends on two cams integral with the shaft. The helical wire passes through an arm of the player which is thus driven along the propeller. The guide bar of the player is fixed by embedding at one of its ends and the actuation of the switch is done by lateral movement of the player by one of the cams of the shaft, the movement of the player being authorized by bending of its guide bar. The adjustment of this device is relatively long and delicate. Indeed, depending on whether the initial or preset stop positions are located upstream or downstream from the desired stop positions, the adjustment method is different and a priori the user does not know the upstream / downstream situation of these positions. It is therefore led, in the first place, to carry out some tests to locate these positions. In the case where the initial stop positions are upstream of the desired stop positions, the user must, firstly activate the electric motor until it stops automatically at this initial stop position, then cause the propeller and the cam to rotate so as to ensure the closing of the switch, the restarting of the motor and the movement of the windable feed controlled by the motor, the propeller having to be driven manually until the rollable element is in the desired position. A hysteresis due to the reaction time of the user and of the moving elements is inevitable, which has the effect of shifting the effective breakpoint and requiring touch-ups. If the initial stop positions are downstream of the desired stop positions, the user must first activate the electric motor until the roll-up element is in the desired position, then manually drive the propeller in rotation so as to bring the cam into contact with the switch to cut the power to the motor. This last operation can only be done by trial and error, that is to say by repeating these operations until the powering up of the motor no longer causes the rotation of the motor.

La présente invention a pour but la réalisation d'un dispositif d'arrêt automatique permettant un réglage rapide, précis et sans équivoque.The object of the present invention is to provide an automatic stop device allowing rapid, precise and unequivocal adjustment.

Le dispositif d'arrêt automatique selon l'invention est caractérisé en ce que ledit arbre est constitué d'une vis mère et que le baladeur comporte une partie profilée engagée dans la vis mère et que la barre de guidage du baladeur est montée sur une bascule permettant d'écarter le baladeur de la vis mère et comporte un ressort agissant axialement sur le baladeur de manière à amener instantanément le baladeur dans la position dans laquelle il actionne ledit interrupteur lors de son écartement de la vis mère.The automatic stop device according to the invention is characterized in that said shaft consists of a lead screw and that the player has a profiled part engaged in the lead screw and that the guide bar of the player is mounted on a rocker allowing to move the player away from the mother screw and comprises a spring acting axially on the player so as to instantly bring the player into the position in which it actuates said switch when it is spaced from the mother screw.

Ainsi, en partant d'une position quelconque du baladeur, il est possible, par une simple action, sur la bascule, d'amener instantanément le baladeur en position initiale, c'est-à-dire en position d'arrêt du moteur. Dans cette position, le moteur peut être alimenté et l'élément enroulable qu'il commande peut être entraîné et amené dans la position d'arrêt désirée sans que le baladeur quitte sa position initiale. Lorsque la bascule est relâchée dans sa position normale, le dispositif est réglé.Thus, starting from any position of the player, it is possible, by a simple action, on the rocker, to bring the player instantly to the initial position, that is to say in the engine stop position. In this position, the motor can be powered and the windable element which it controls can be driven and brought to the desired stop position without the player leaving its initial position. When the rocker is released in its normal position, the device is adjusted.

L'interrupteur peut être actionné, soit par le déplacement axial du baladeur, soit par son déplacement latéral par une came solidaire de la vis mère, la présence d'une bascule favorisant cette seconde solution.The switch can be actuated, either by the axial displacement of the player, or by its lateral displacement by a cam secured to the mother screw, the presence of a rocker favoring this second solution.

Selon un mode d'exécution préféré de l'invention, la vis mère est débrayable et l'axe de la bascule est muni d'un levier radial assurant successivement le débrayage de la vis mère et un positionnement initial déterminé précis de celle-ci lors de l'entraînement de l'arbre au moyen d'un poussoir bistable. Le même axe peut être utilisé pour actionner un interrupteur de shuntage court-circuitant l'interrupteur d'arrêt et permettant ainsi l'alimentation du moteur dans la position écartée de la bascule. Toutes ces fonctions sont remplies par un dispositif de construction simple et compact.According to a preferred embodiment of the invention, the mother screw is disengageable and the axis of the lever is provided with a radial lever successively ensuring the disengagement of the mother screw and a precise initial positioning determined thereof during of the shaft drive by means of a bistable pusher. The same axis can be used to actuate a shunt switch short-circuiting the stop switch and thus allowing the supply of the motor in the position away from the rocker. All these functions are fulfilled by a simple and compact construction device.

Le dessin annexé représente, à titre d'exemple, un mode d'exécution du dispositif selon l'invention.The accompanying drawing shows, by way of example, an embodiment of the device according to the invention.

La figure 1 est une vue en coupe selon I-I de la figure 2 d'un dispositif d'arrêt automatique à deux vis mères et deux baladeurs, dans une position intermédiaire de ces baladeurs.Figure 1 is a sectional view along I-I of Figure 2 of an automatic stop device with two lead screws and two players, in an intermediate position of these players.

La figure 2 est une vue en coupe selon II-II de la figure 1.Figure 2 is a sectional view along II-II of Figure 1.

La figure 3 représente le même dispositif avec l'un des baladeurs en fin de course selon une coupe III-III de la figure 4.FIG. 3 represents the same device with one of the portable devices at the end of the race according to a section III-III of FIG. 4.

La figure 4 est une vue en coupe selon IV-IV de la figure 3.FIG. 4 is a sectional view along IV-IV of FIG. 3.

La figure 5 représente le même dispositif avec l'un des baladeurs en position initiale selon une coupe V-V de la figure 6.FIG. 5 shows the same device with one of the portable players in the initial position in a V-V section in FIG. 6.

La figure 6 est une vue en coupe selon VI-VI de la figure 5.FIG. 6 is a sectional view along VI-VI of FIG. 5.

La figure 7 est une vue en coupe selon VII-VII de la figure 5 montrant les poussoirs bistables d'actionnement des bascules.Figure 7 is a sectional view along VII-VII of Figure 5 showing the bistable actuators of the rockers.

La figure 8 représente le schéma électrique de commande du moteur.FIG. 8 represents the electrical diagram for controlling the motor.

On se réfère aux figures 1 et 2.We refer to Figures 1 and 2.

Le dispositif représenté comporte un bâti 1 en forme de berceau sur lequel sont montés les différents éléments mobiles du dispositif d'arrêt ainsi que les interrupteurs et les moyens de commande.The device shown comprises a frame 1 in the form of a cradle on which are mounted the various mobile elements of the stop device as well as the switches and the control means.

Le dispositif comprend deux vis mères 2 et 3 montées coaxialement et librement sur un axe commun 4 et poussées vers chacune des extrémités de cet axe par un ressort hélicoïdal commun 5 disposé entre les vis mères. L'extrémité de la vis mère 2 opposée au ressort 5 est munie d'une couronne dentée 6 engrenant, sous la poussée du ressort 5, avec la denture intérieure d'une couronne 7 fixée sur l'axe 4. Le filetage de la vis mère 2 est prolongé en arrière par une partie de diamètre grandissant en spirale constituant une came 8. Cette came 8 se termine en arrière par une butée 9. Entre la couronne 6 et la butée 9, le corps de la vis mère 2 présente une partie en forme de came coeur 10.The device comprises two lead screws 2 and 3 mounted coaxially and freely on a common axis 4 and pushed towards each of the ends of this axis by a common helical spring 5 disposed between the lead screws. The end of the mother screw 2 opposite the spring 5 is provided with a toothed crown 6 meshing, under the thrust of the spring 5, with the internal toothing of a crown 7 fixed on the axis 4. The thread of the screw mother 2 is extended behind by a portion of diameter growing in a spiral constituting a cam 8. This cam 8 ends at the rear by a stop 9. Between the crown 6 and the stop 9, the body of the mother screw 2 has a part in the shape of a heart cam 10.

De manière analogue, la vis mère 3 présente une came en spirale 12, une butée 13, une came coeur l4 et une couronne dentée 15 engrenant, sous la poussée du ressort 5, avec la denture intérieure d'une couronne dentée 16 fixée sur l'axe 4 et munie d'une denture extérieure 17 engrenant avec le mobile de sortie du réducteur associé au moteur à commander.Similarly, the lead screw 3 has a spiral cam 12, a stop 13, a heart cam 14 and a toothed ring 15 meshing, under the thrust of the spring 5, with the internal toothing of a toothed ring 16 fixed on the axis 4 and provided with an external toothing 17 meshing with the output gear of the reduction gear associated with the motor to be controlled.

Sur le bâti 1 est monté parallèlement aux vis mères, un axe 18 (figure 2) sur lequel est montée une bascule 19 solidaire en rotation, avec un certain jeu angulaire, de l'axe 18. Cette bascule 19 est munie de deux bras transversaux 20 et 21 supportant une barre de guidage cylindrique 22 sur laquelle est montée librement un baladeur circulaire 23 muni d'une arête 24 engagée dans le filetage de la vis mère 2. La barre de guidage 22 est entourée d'un ressort hélicoïdal 25 comprimé entre le baladeur 23 et le bras 21. Le bras 20 de la bascule présente, approximativement dans le prolongement de la barre 22, un bras longitudinal 26 coopérant avec un interrupteur 27 et sur lequel agit un ressort 28 maintenant, d'une part, le baladeur 23 en prise avec la vis mère 2 et, d'autre part, l'interrupteur 27 actionné. Cet interrupteur est fermé lorsqu'il est actionné (figure 8).On the frame 1 is mounted parallel to the mother screws, an axis 18 (Figure 2) on which is mounted a rocker 19 integral in rotation, with a certain angular play, of the axis 18. This rocker 19 is provided with two transverse arms 20 and 21 supporting a cylindrical guide bar 22 on which is freely mounted a circular player 23 provided with an edge 24 engaged in the thread of the lead screw 2. The guide bar 22 is surrounded by a helical spring 25 compressed between the player 23 and the arm 21. The arm 20 of the rocker has, approximately in the extension of the bar 22, a longitudinal arm 26 cooperating with a switch 27 and on which a spring acts 28 now, on the one hand, the player 23 engaged with the mother screw 2 and, on the other hand, the switch 27 actuated. This switch is closed when activated (Figure 8).

Sur l'axe 18 de la bascule est en outre calé, avec un jeu angulaire, un bras radial 29 présentant d'une part un biseau 29a et d'autre part une encoche 29b. Le bras 29 est positionné sur l'axe 18 de telle sorte que lorsqu'il est entraîné en rotation dans la direction de la vis mère 2, son biseau 29a vient buter contre l'arête 30 de la vis mère en agissant sur celle-ci comme une came repoussant la vis mère 2 vers la droite en comprimant le ressort 5 et en débrayant la vis mère de la couronne 7.On the axis 18 of the rocker is also fixed, with an angular clearance, a radial arm 29 having on the one hand a bevel 29a and on the other hand a notch 29b. The arm 29 is positioned on the axis 18 so that when it is rotated in the direction of the mother screw 2, its bevel 29a abuts against the edge 30 of the mother screw by acting on it like a cam pushing the mother screw 2 to the right by compressing the spring 5 and by disengaging the mother screw from the crown 7.

En poursuivant sa course, le bras 29 vient, par son encoche 29b actionner la came coeur 10 et positionner cette came coeur de manière connue, par exemple comme le marteau de remise à zéro d'un chronographe.Continuing its course, the arm 29 comes, by its notch 29b to actuate the heart cam 10 and to position this heart cam in a known manner, for example like the reset hammer of a chronograph.

L'autre vis mère 3 coopère avec des moyens identiques désignés par les mêmes références accompagnées du signe ′. Ces moyens sont montés en tête-bèche relativement aux premiers moyens, à l'exception de la bascule 19′ et de ses bras, du ressort 28′ et de l'interrupteur 27′ qui sont situés en face des éléments correspondants des premiers moyens. Dans la partie supérieure de la figure 1, on distingue additionnellement une came 31′ fixée à l'extrémité de l'axe 18′ de la bascule, came destinée à actionner un interrupteur 32′ venant court-circuiter l'interrupteur 31′ en position actionnée. L'axe 18 des premiers moyens est muni d'une came identique à la came 31′, mais non visible sur le dessin et actionnant un interrupteur de shuntage 32 représenté en traits mixtes car non visible sur la coupe.The other lead screw 3 cooperates with identical means designated by the same references accompanied by the sign ′. These means are mounted head to tail relative to the first means, with the exception of the rocker 19 ′ and its arms, the spring 28 ′ and the switch 27 ′ which are located opposite the corresponding elements of the first means. In the upper part of FIG. 1, there is additionally a cam 31 ′ fixed to the end of the axis 18 ′ of the rocker, a cam intended for actuate a switch 32 ′ which short-circuit switch 31 ′ in the actuated position. The axis 18 of the first means is provided with a cam identical to the cam 31 ′, but not visible in the drawing and actuating a shunt switch 32 shown in phantom because not visible in the section.

Comme ceci est visible à la figure 2, les axes 18 et 18′ entraînent les bascules par un profil en forme de secteur avec un certain jeu angulaire. Les bras 29 et 29′ sont entraînés de la même manière avec un petit jeu angulaire. Le rôle de ces jeux apparaîtra clairement lors de la description du fonctionnement du dispositif. Sur les axes 18 et 18′ de bascules, sont en outre fixés des pignons 33 et 33′ (figures 5 et 7). Le pignon 33 engrène avec une crémaillère 34 d'un poussoir 35 monté dans un logement à l'extrémité du bâti 1. Ce poussoir 35 comprime un ressort 36 et il présente latéralement une rainure 37 en forme de coeur dans laquelle est engagée l'extrémité coudée d'un ressort fil 38. Cet agencement bien connu en soit assure deux positions stables au poussoir 35, soit une position enfoncée, comme représenté pour le poussoir 35 et une position non enfoncée, comme représenté pour le poussoir correspondant 35′. Les poussoirs 35 et 35′ permettent donc de maintenir les deux axes correspondants 18 et 18′ dans deux positions déterminées. On comprendra dès lors la nécessité de jeux angulaires dans l'entraînement des bascules et des bras de débrayage.As can be seen in FIG. 2, the axes 18 and 18 ′ drive the rockers by a sector-shaped profile with a certain angular play. The arms 29 and 29 ′ are driven in the same way with a small angular play. The role of these games will become clear when describing the operation of the device. On the axes 18 and 18 ′ of rockers, pinions 33 and 33 ′ are also fixed (Figures 5 and 7). The pinion 33 meshes with a rack 34 of a pusher 35 mounted in a housing at the end of the frame 1. This pusher 35 compresses a spring 36 and it laterally has a heart-shaped groove 37 in which the end is engaged bent by a wire spring 38. This well-known arrangement in itself provides two stable positions for the pusher 35, or a depressed position, as shown for the pusher 35 and a non-depressed position, as shown for the corresponding pusher 35 ′. The pushers 35 and 35 ′ therefore make it possible to maintain the two corresponding axes 18 and 18 ′ in two determined positions. We will therefore understand the need for angular play in the drive of the rockers and clutch release arms.

Le circuit électrique d'alimentation du moteur est représenté à la figure 8. Le moteur M est un moteur à courant continu alimenté par une source de courant de 12V par l'intermédiaire d'un commutateur inverseur non représenté. Les interrupteurs 27 et 27′ sont représentés en position actionnée et les interrupteurs 32 et 32′ en position non actionnée. Les positions correspondent à des positions intermédiaires des baladeurs 23 et 23′. Les interrupteurs 27 et 32 sont montés en série avec une diode D1 et un relais R1, tandis que les interrupteurs 27′ et 32′ sont montés parallèlement, en série avec une diode D3 et un relais R2. Les diodes D1, D3 sont antiparallèles. Entre les bornes des bobinages de chacun des relais R1, R2 sont montées, de manière antiparallèle, des diodes de roue libre D2 et D4. Les relais R1 et R2 sont munis d'un contact inverseur r1, respectivement r2 représentés au repos et dont les points communs c sont reliés respectivement à chacune des bornes du moteur M. En parallèle au contact r1 est branchée une diode D6 permettant le passage du courant dans le moteur lorsque le contact r1 est en position de repos telle que représentée au dessin. De même, une diode D5 est branchée en parallèle au contact r2. Lorsque le circuit est alimenté avec la polarité représentée au dessin, le courant traverse l'interrupteur 27′, la diode D3 et le relais R2 qui est alors excité. Le contact r2 passe dans la position b et le courant peut traverser le moteur M par le contact r2 et la diode D6. Pour l'autre sens de rotation du moteur M, c'est le relais R1 qui est excité et le moteur est alimenté à travers le contact r1 sur la borne b et la diode D5.The electrical circuit supplying the motor is shown in FIG. 8. The motor M is a direct current motor supplied by a 12V current source via a change-over switch not shown. The switches 27 and 27 ′ are shown in the actuated position and the switches 32 and 32 ′ in the unactuated position. The positions correspond to intermediate positions of the portable players 23 and 23 ′. The switches 27 and 32 are connected in series with a diode D1 and a relay R1, while the switches 27 ′ and 32 ′ are connected in parallel, in series with a diode D3 and a relay R2. The diodes D1, D3 are antiparallel. Freewheeling diodes D2 and D4 are mounted between the terminals of the windings of each of the relays R1, R2. Relays R1 and R2 are provided with a change-over contact r1, respectively r2 represented at rest and whose common points c are connected respectively to each of the motor terminals M. In parallel with contact r1 is connected a diode D6 allowing the passage of the current in the motor when contact r1 is in the rest position as shown in the drawing. Likewise, a diode D5 is connected in parallel to contact r2. When the circuit is supplied with the polarity shown in the drawing, the current flows through the switch 27 ′, the diode D3 and the relay R2 which is then energized. Contact r2 goes to position b and current can flow through motor M through contact r2 and diode D6. For the other direction of rotation of the motor M, it is the relay R1 which is energized and the motor is supplied through the contact r1 on the terminal b and the diode D5.

Le fonctionnement du dispositif est le suivant :
   On suppose tout d'abord que les baladeurs 23 et 23′ sont dans une position quelconque, par exemple la position représentée à la figure 1. Lorsque le moteur tourne, les deux baladeurs sont entraînés chacun par leur vis mère en sens opposés. On admettra que les baladeurs se déplacent en direction de leur came 8 et 8′. Le premier baladeur qui monte sur sa came, par exemple le baladeur 23, entraîne la bascule 19 qui peut basculer librement sur son axe 18 en raison du jeu angulaire prévu à cet effet. Le bras 26 cesse d'actionner le contact 27 qui s'ouvre provoquant l'arrêt du moteur (figures 3 et 4).The operation of the device is as follows:
It is first assumed that the players 23 and 23 'are in any position, for example the position shown in Figure 1. When the engine is running, the two players are each driven by their lead screw in opposite directions. We will admit that players move in the direction of their cam 8 and 8 ′. The first player which mounts on its cam, for example the player 23, drives the rocker 19 which can tilt freely on its axis 18 due to the angular play provided for this purpose. The arm 26 ceases to actuate the contact 27 which opens causing the engine to stop (Figures 3 and 4).

Le réglage des points d'arrêt haut et bas d'un store, sera décrit au moyen des figures 5 et 6.The adjustment of the top and bottom stopping points of a blind will be described by means of Figures 5 and 6.

On enfonce les deux poussoirs 35 et 35′ dans leur seconde position. Les deux bascules 19 et 19′ sont ainsi écartées des vis mères et les baladeurs 23 et 23′ sont ramenés instantanément dans leur position initiale par leurs ressorts 25 et 25′ c'est-à-dire en butée contre les butées 9 et 13 comme représenté à la figure 5 pour le baladeur 23 et le poussoir 35. L'enfoncement du poussoir 35 a en outre pour effet, au bout d'une certaine course, déterminée par le jeu du bras 29 sur l'axe 18, d'entraîner le bras 29 qui vient successivement débrayer la vis mère 2 et positionner angulairement cette vis mère par sa came coeur 10. Il en va de même pour la vis mère 3. Simultanément, les contacts de shuntage 32 et 32′ sont fermés permettant l'alimentation du moteur. Il est dès lors possible d'alimenter le moteur et d'amener l'élément enroulable dans une première position d'arrêt, par exemple celle déterminée par le baladeur 23. Il suffit alors de presser une nouvelle fois sur le bouton poussoir 35 pour ramener la bascule dans sa position de repos représentée à la figure 1. La vis mère 2 est à nouveau embrayée et le baladeur 23 en prise avec celle-ci. Le réglage du premier point d'arrêt est ainsi terminé.We push the two pushers 35 and 35 ′ in their second position. The two rockers 19 and 19 ′ are thus spaced from the mother screws and the players 23 and 23 ′ are instantly returned to their initial position by their springs 25 and 25 ′, that is to say in abutment against the stops 9 and 13 as shown in Figure 5 for the player 23 and the pusher 35. The depression of the pusher 35 also has the effect, after a certain stroke, determined by the play of the arm 29 on the axis 18, to cause the arm 29 which successively disengages the mother screw 2 and angularly position this mother screw by its heart cam 10. The same goes for the mother screw 3. Simultaneously, the shunt contacts 32 and 32 ′ are closed allowing the supply of the motor. It is therefore possible to power the motor and bring the windable element into a first stop position, for example that determined by the player 23. It then suffices to press the push button 35 again to bring back the rocker in its rest position shown in Figure 1. The mother screw 2 is again engaged and the player 23 engaged therewith. The setting of the first breakpoint is thus completed.

Une tension inverse est ensuite appliquée au moteur pour l'entraîner dans l'autre sens et le réglage de l'autre point d'arrêt s'effectue de la même manière au moyen du poussoir 35′.A reverse voltage is then applied to the motor to drive it in the other direction and the adjustment of the other breakpoint is carried out in the same way by means of the push-button 35 ′.

Le réglage des deux points d'arrêt s'effectue donc très rapidement, par l'intermédiaire d'opérations simples, sans risque d'erreur et avec une très grande précision étant donné la mise à zéro des vis mères au moyen des cames coeurs.The adjustment of the two breakpoints is therefore carried out very quickly, by means of simple operations, without risk of error and with very high precision given the setting of the mother screws by means of the cams.

Dans une version simplifiée, il serait bien entendu possible de se passer des cames coeurs, une position initiale angulaire précise des vis mères n'étant pas nécessaire dans tous les cas.In a simplified version, it would of course be possible to dispense with the core cams, a precise angular initial position of the lead screws not being necessary in all cases.

Comme déjà mentionné dans l'introduction, les interrupteurs de fin de course pourraient être actionnés dans une direction parallèle à l'axe des vis mères. Dans ce cas, les cames 8 et 8′ ne sont pas nécessaires.As already mentioned in the introduction, the limit switches could be actuated in a direction parallel to the axis of the lead screws. In this case, the cams 8 and 8 ′ are not necessary.

Selon un mode d'exécution simplifié on pourrait également renoncer au débrayage des vis mères.According to a simplified embodiment, one could also give up the disengagement of the lead screws.

Selon un autre mode d'exécution simplifié de l'invention, les moyens de positionnement bistable des bascules, constitués par les poussoirs 35 et 35′, pourraient être supprimés et les bascules maintenues écartées par un autre moyen.According to another simplified embodiment of the invention, the means for bistable positioning of the rockers, constituted by the pushers 35 and 35 ′, could be eliminated and the rockers kept apart by other means.

Les cames d'actionnement des baladeurs pourraient avoir une autre forme.The actuation cams of portable music players could have another shape.

Si l'on ne désire qu'un point d'arrêt, le dispositif pourrait comporter une seule vis mère et un seul baladeur.If only one stopping point is desired, the device could comprise a single lead screw and a single walkman.

Claims (8)

Dispositif d'arrêt automatique pour moteur électrique après un certain nombre de tours, comprenant un arbre (2) entraîné en rotation par le moteur et présentant sur son pourtour un profil hélicoïdal entraînant linéairement un baladeur (23) monté coulissant sur une barre de guidage (22) parallèle à l'axe dudit arbre et venant actionner un interrupteur (27) en un point déterminé de sa course sur ledit profil hélicoïdal, caractérisé en ce que ledit arbre est constitué d'une vis mère (2) et que le baladeur (23) comporte une partie profilée (24) engagée dans la vis mère et que la barre de guidage (22) du baladeur est montée sur une bascule (19) permettant d'écarter le baladeur de la vis mère et comporte un ressort (25) agissant axialement sur le baladeur de manière à amener instantanément le baladeur dans la position dans laquelle il actionne ledit interrupteur lors de son écartement de la vis mère.Automatic stop device for an electric motor after a certain number of turns, comprising a shaft (2) driven in rotation by the motor and having on its periphery a helical profile linearly driving a walkman (23) mounted sliding on a guide bar ( 22) parallel to the axis of said shaft and actuating a switch (27) at a determined point in its travel on said helical profile, characterized in that said shaft consists of a lead screw (2) and that the sliding gear ( 23) has a profiled part (24) engaged in the lead screw and that the guide bar (22) of the player is mounted on a rocker (19) making it possible to separate the player from the lead screw and includes a spring (25) acting axially on the player so as to instantly bring the player into the position in which it actuates said switch when it is spaced from the mother screw. Dispositif d'arrêt automatique selon la revendication 1, dans lequel la vis mère est montée mobile axialement sur un axe (4) et maintenue embrayée par un ressort (5) avec un mobile (7) cinématiquement lié au moteur, caractérisé en ce qu'il comporte un bras radial (29) solidaire de la bascule et présentant un profil (29a) tel que dans une position écartée de la bascule il vient pousser et débrayer la vis mère.Automatic stop device according to claim 1, in which the lead screw is mounted axially movable on an axis (4) and kept engaged by a spring (5) with a movable (7) kinematically linked to the motor, characterized in that it comprises a radial arm (29) integral with the rocker and having a profile (29a) such that in a position away from the rocker it pushes and disengages the mother screw. Dispositif selon la revendication 2, caractérisé en ce que la vis mère (2) porte une came coeur (10) située sur la trajectoire dudit bras radial (29) et actionnée par ce bras, après débrayage de la vis mère, pour assurer un positionnement angulaire initial précis de la vis mère.Device according to claim 2, characterized in that the mother screw (2) carries a heart cam (10) located on the path of said radial arm (29) and actuated by this arm, after disengaging the mother screw, to ensure positioning precise initial angular of the mother screw. Dispositif selon l'une des revendications 1, 2 ou 3, dans lequel la vis mère comporte, à l'une de ses extrémités, une came (8) provoquant le déplacement radial du baladeur et l'actionnement de l'interrupteur (27) par le déplacement du baladeur, caractérisé en ce que ladite came (8) est constituée par un prolongement en forme de spirale du filetage de la vis mère.Device according to one of claims 1, 2 or 3, in which the lead screw comprises, at one of its ends, a cam (8) causing the radial movement of the player and actuation of the switch (27) by the movement of the player, characterized in that said cam (8) is constituted by a spiral-shaped extension of the thread of the mother screw. Dispositif selon la revendication 4, caractérisé en ce qu'il comprend un second interrupteur (32) dont l'actionnement a pour effet de court-circuiter le premier interrupteur, un organe actionnant ce second interrupteur dans une position écartée de la bascule et des moyens d'actionnement bistables (35) de la bascule agencés de manière à maintenir, dans une première position, le baladeur en prise avec la vis mère et, dans une seconde position, à maintenir la bascule écartée et le second interrupteur actionné.Device according to claim 4, characterized in that it comprises a second switch (32), the actuation of which has the effect of short-circuiting the first switch, a member actuating this second switch in a position separated from the rocker and means bistable actuation (35) of the rocker arranged so as to keep, in a first position, the player in engagement with the mother screw and, in a second position, to keep the rocker apart and the second switch actuated. Dispositif selon l'ensemble des revendications 1 à 5, caractérisé en ce que la bascule (19) et le bras radial (29) sont liés coaxialement à un axe de commande (18) avec des jeux angulaires tels que le bras radial n'est pas entraîné lorsque la bascule est écartée par l'action de ladite came sur le baladeur, et que lorsque ledit axe de commande est actionné par lesdits moyens d'actionnement bistables pour être écartés de la vis mère, il provoque successivement l'écartement du baladeur de la vis mère, l'entraînement du bras radial et par là le débrayage de la vis mère, puis son positionnement angulaire par la came coeur et l'actionnement du second interrupteur.Device according to all of claims 1 to 5, characterized in that the rocker (19) and the radial arm (29) are coaxially connected to a control axis (18) with angular clearances such that the radial arm is not not driven when the rocker is moved apart by the action of said cam on the player, and when when said control pin is actuated by said bistable actuating means to be moved away from the mother screw, it successively causes the player to move apart of the mother screw, driving the radial arm and thereby disengaging the mother screw, then its angular positioning by the core cam and actuation of the second switch. Dispositif d'arrêt automatique selon l'une des revendications 1 à 6, caractérisé en ce qu'il est double de manière à assurer deux points d'arrêt pour deux sens de rotation différents du moteur et que les deux vis mères (2, 3) sont coaxiales.Automatic stop device according to one of claims 1 to 6, characterized in that it is double so as to provide two stop points for two different directions of rotation of the motor and that the two lead screws (2, 3 ) are coaxial. Dispositif d'arrêt automatique selon la revendication 7, caractérisé en ce que l'un des interrupteurs (27) et son interrupteur de shuntage (32) sont branchés entre les bornes d'une source d'alimentation à courant continu à polarité inversable et en série avec une première diode (D1) et un premier relais (R1) entre les bornes duquel est branchée une première diode de roue libre (D2), que l'autre interrupteur (27′) et son interrupteur de shuntage (32′) sont branchés entre les bornes de la source de courant continu et en série avec une deuxième diode (D3) antiparallèle à la première diode (D1) et un second relais (R2) entre les bornes duquel est branchée une seconde diode de roue libre (D4), et que chacun des relais comporte un contact inverseur (r1, r2) dont les points communs sont reliés à chacune des bornes du moteur (M), des diodes (D5, D6) branchées parallèlement au contact inverseur assurant le passage du courant en direction de la source.Automatic stop device according to claim 7, characterized in that one of the switches (27) and its shunt switch (32) are connected between the terminals of a direct current power source with reversible polarity and in series with a first diode (D1) and a first relay (R1) between the terminals of which a first freewheeling diode (D2) is connected, that the other switch (27 ′) and its shunt switch (32 ′) are connected between the terminals of the direct current source and in series with a second diode (D3) antiparallel to the first diode (D1) and a second relay (R2) between the terminals of which a second freewheeling diode (D4) is connected , and that each of the relays includes a change-over contact (r1, r2) whose common points are connected to each of the motor terminals (M), diodes (D5, D6) connected parallel to the change-over contact ensuring the flow of current in the direction from the source.
EP92810533A 1991-07-19 1992-07-14 Automatic stop device with actuating sleeve for electric motor Expired - Lifetime EP0524152B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9109173 1991-07-19
FR9109173A FR2679376B1 (en) 1991-07-19 1991-07-19 AUTOMATIC SHUTDOWN DEVICE WITH ELECTRIC MOTOR.

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EP0524152A1 true EP0524152A1 (en) 1993-01-20
EP0524152B1 EP0524152B1 (en) 1996-03-27

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AT (1) ATE136154T1 (en)
DE (1) DE69209393T2 (en)
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US5402984A (en) * 1994-01-18 1995-04-04 The United States Of America As Represented By The Secretary Of The Navy Jack mechanism having positive stop means for its crank handle
US7389806B2 (en) * 2005-02-24 2008-06-24 Lawrence Kates Motorized window shade system
US20070079516A1 (en) * 2005-10-07 2007-04-12 Eckstein Patrick J Device for marking a straight line
US20090308543A1 (en) * 2008-06-13 2009-12-17 Lawrence Kates Motorized window shade system and mount
CN107647891B (en) * 2017-10-20 2023-08-29 北京派尔特医疗科技股份有限公司 Electric endoscope anastomat
CN118173407B (en) * 2024-05-14 2024-07-09 山西王家岭煤业有限公司 Safety device for coal mine circuit switch

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DE1081553B (en) * 1958-09-23 1960-05-12 Dittelbach & Kerzler Spindle limit switch with built-in pre-contact
DE2714493B1 (en) * 1977-03-31 1978-02-09 Siemens Ag LIMIT SWITCH FOR A SHAFT DRIVEN OVER A LARGER ROTATION ANGLE
FR2599524A1 (en) * 1986-05-28 1987-12-04 Somfy Device for automatically stopping the winding and unwinding of a windable element

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FR2076529A5 (en) * 1970-01-19 1971-10-15 Carpano & Pons
US4396813A (en) * 1981-12-03 1983-08-02 Westinghouse Electric Corp. Enclosed circuit interrupter of the drawout type having a position actuated drive clutch on the drive means
FR2656463B1 (en) * 1989-12-22 1992-04-17 Somfy AUTOMATIC STOPPING DEVICE FOR AN ELECTRIC MOTOR AFTER A NUMBER OF TURNS.

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Publication number Priority date Publication date Assignee Title
DE1081553B (en) * 1958-09-23 1960-05-12 Dittelbach & Kerzler Spindle limit switch with built-in pre-contact
DE2714493B1 (en) * 1977-03-31 1978-02-09 Siemens Ag LIMIT SWITCH FOR A SHAFT DRIVEN OVER A LARGER ROTATION ANGLE
FR2599524A1 (en) * 1986-05-28 1987-12-04 Somfy Device for automatically stopping the winding and unwinding of a windable element

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FR2679376A1 (en) 1993-01-22
DE69209393T2 (en) 1996-10-31
ATE136154T1 (en) 1996-04-15
DE69209393D1 (en) 1996-05-02
FR2679376B1 (en) 1993-11-12
ES2048720T1 (en) 1994-04-01
ES2048720T3 (en) 1996-05-16
US5230416A (en) 1993-07-27
EP0524152B1 (en) 1996-03-27

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