EP3502394A1 - Assembly for motorising a shutter and mechanical fuse for protecting said motorising assembly - Google Patents

Abstract

A swing shutter motor assembly (10) comprising at least a first electromechanical module (M1), the first electromechanical module (M1) comprising at least a first electric motor (MA), the motor assembly comprising at least one mechanical connection (LM) comprising a first part (LM1) and a second part (LM2), the mechanical connection (LM) comprising- a mechanical transmission device (8a, 8b), - a transmission shaft (70) at the output of the mechanical transmission device (8a, 8b), - an arm (9a, 9b), the first electric motor (MA) being configured to be connected, in the assembled configuration of the motor assembly, via the mechanical linkage (LM) and a leaf (5a, 5b) of the flap (5) so as to drive the leaf (5a, 5b) during the electrical activation of the first electric motor (MA), characterized in that the mechanical connection ( LM) further comprises a mechanical fuse (200), the fuse unit (200) comprising a fuse body (202) connected to the first part (LM1) of the mechanical connection (LM) and at least one breakable part (211, 212, 213, 214) connected to the fuse body (202) ), the at least one breakable portion being configured to cooperate with a receiving zone (221, 222, 223, 224) of the second portion (LM2) of the mechanical link (LM).

Description

The invention relates to a flap shutter motor assembly to be fixed at an opening in a building.

In the field of home automation, it is known to use a motorization system for swing shutters to be fixed to a lintel or a window sill so as to automate the closing and opening of swing shutters.

Numerous motorization solutions make it possible to manage the opening and closing movements of flap shutters: it is known to use either a single motor or a single motor for a shutter composed of two leaves or leaves that can pivot on hinges. to cover an opening in a building, or to leave it uncovered.

In all cases, the solutions of the prior art define a synchronization of the movements of the two leaves. Indeed, the shutters must be closed or opened in a particular order, because of their asymmetry and the presence of a joint cover, that is to say a covering blade of a leaf on the other . Indeed, the main leaf, comprising the cover blade or cover, must be controlled first at the opening and last at closing to ensure that the cover blade is well cover a so-called secondary leaf.

A first motorization solution consists in using a one-piece motor assembly, integrating into the same housing the two motors for each leaf. Another motorization solution consists of using independent motor modules, each comprising a motor, assigned to the motorization of the motor. 'a fighter.

Thus, a first mechanical module comprising a first motor drives a first leaf and a second mechanical module comprising a second motor drives a second leaf. One of the two modules also comprises an electronic control unit of the first and second engines. Thus, the module comprising the control unit is qualified electromechanical module. These two modules are usually covered with a finishing cover. Each module also comprises a mechanical transmission device, including a gearset transmission device, for transmitting the movements respectively provided by the motors to the main and secondary leaves. A transmission shaft is located at the output of these transmission devices. Arms connect the drive shaft to the wings to transmit the rotational movement of the corresponding motor in a movement of the wing around its hinges.

Known motorization assemblies therefore comprise an electronic control unit, which controls the power supply of the motors and has, in particular, control means electronic monitoring, in particular means for detecting an abutment force (by measuring engine torque, torque variation or under-speed). These force detection means make it possible to stop the motor when the detected forces exceed a predetermined threshold. This avoids damaging the engine in case of excessive effort.

The forces detected at the electronic unit are consecutive forces applied to at least one of the leaves, especially because of an obstacle or gust of wind when the flap is moving or intermediate between the fully open position and the fully closed position of the flaps or an intrusion attempt when the flap is closed. These forces are transmitted along the kinematic chain, that is to say at the arms and mechanical transmission devices to the engine. Although taken into account in the predefined limits of effort endurable by the engine, the efforts actually cashed by the elements of the drivetrain, because brutal, can lead despite the electronic monitoring means, to damage the components of this chain kinematic, to the motor.

If the torque due to the violent force on the wings is transmitted along the drive train to the engine, the transmission device or the engine itself may be damaged. The effort detection means provided at the electronic control unit may allow to limit the forces, for example those provided by the engine if they are contrary to the forces exerted on the leaf. However, they can not always protect the driveline. For example, in a particular case where a connection between the transmission shaft and the arm is in the form of a hexagonal connection, significant efforts can lead to a deterioration of the hexagonal link, at the level of an arm or at the level of of a transmission shaft, causing significant games, or even a sliding of one of the parts relative to each other in subsequent movements. The motor assembly can then no longer be able to transmit the torques necessary for the drive in rotation of the leaves.

It is to these drawbacks that the invention more particularly intends to remedy by proposing a protected motor assembly in case of exceeding a predefined torque applied to the flaps of the flap.

• un dispositif de transmission mécanique,
• un arbre de transmission en sortie du dispositif de transmission mécanique,
• un bras,

le premier moteur électrique étant configuré pour être relié, en configuration assemblée de l'ensemble de motorisation, par l'intermédiaire de la liaison mécanique et à un battant du volet de sorte à entraîner le battant lors de l'activation électrique du premier moteur électrique.
Selon l'invention, la liaison mécanique comprend en outre un fusible mécanique, le fusible mécanique comprenant un corps de fusible, relié à la première partie de la liaison mécanique et au moins une partie sécable reliée au corps de fusible, l'au moins une partie sécable étant configurée pour coopérer avec une zone d'accueil de la deuxième partie de la liaison mécanique.In this regard, the present invention aims, in a first aspect, a flap shutter motor assembly comprising at least a first electromechanical module, the first electromechanical module comprising at least a first electric motor, the motorization assembly comprising at least one mechanical connection (LM) comprising a first portion and a second portion, the mechanical link comprising

• a mechanical transmission device,
• a transmission shaft at the output of the mechanical transmission device,
• an arm,

the first electric motor being configured to be connected, in the assembled configuration of the motor assembly, via the mechanical connection and to a leaf of the flap so as to drive the leaf during the electrical activation of the first electric motor .
According to the invention, the mechanical connection further comprises a mechanical fuse, the mechanical fuse comprising a fuse body, connected to the first part of the mechanical link and at least one breakable part connected to the fuse body, the at least one breakable portion being configured to cooperate with a reception area of the second part of the mechanical link.

Thus, the mechanical fuse inserted between the two parts of the mechanical link ensures the protection of the electric motor.

According to an advantageous characteristic, the at least one breakable portion is able to be detached from the fuse body under the application of a force greater than a predetermined force value.

Thus, the breaking of the at least one breakable part makes it possible to break the mechanical connection and to avoid the transmission of forces greater than the preset force value towards the engine.

According to an advantageous characteristic, the second part of the mechanical connection comprises a receiving zone adapted to receive the at least one breakable portion of the mechanical fuse after its detachment from the fuse body.

Thus, the breakable portion detached from the fuse is received in the receiving zone, thus ensuring its removal relative to the fuse body and the total breaking of the mechanical link.

According to an advantageous characteristic, the arm is integral with the fuse body and the breakable part or parts and the transmission shaft comprises the reception zone and the reception areas of the breakable parts of the mechanical fuse after rupture, or vice versa.

According to an advantageous characteristic, the motorization assembly comprises a washer and a fastening screw holding the arm and the mechanical fuse on the transmission shaft, the washer comprising stepped sections of different thicknesses, the thinner section being located at the right of the at least one breakable part of the mechanical fuse.
According to another advantageous characteristic, the staggered sections of the washer comprise an inner annular section of smaller thickness than an outer annular section, the outer annular section being in contact with the fuse body.

Thus, the washer placed in close contact with the arm on the section of greater thickness makes it possible to limit the axial clearance between the transmission shaft and the arm at the level of the section of greater thickness. At the same time, it is indeed avoided to clamp the washer on the breakable parts of the mechanical fuse 200, leaving them free to move (axially and radially) to the receiving areas when they are cut.

According to an advantageous characteristic of the invention, the mechanical fuse comprises a plurality of breakable parts, each breakable part cooperating with a reception zone of the second part of the mechanical connection.

According to an advantageous characteristic, the fuse body comprises a central opening, in that the at least one breakable part is a tab connected to the fuse body, the tab extending from an edge of the central opening towards the center of the fuse. the opening.

According to an advantageous characteristic, the at least one breakable portion has a rounded free end.

Thus, the sliding of the sectioned portion in the reception area after rupture is facilitated, this allowing better evacuation of the severed portion outside the reception area.

According to an advantageous characteristic, the number of breakable parts is three, regularly distributed inside the opening of the fuse body.

According to another advantageous characteristic, the number of breakable parts is three, distributed unevenly within the opening of the fuse body, while the number of reception areas is four.

Thus, it is possible to adapt the predetermined force value associated with the mechanical fuse, while facilitating the manufacture of the fuse and corresponding home areas.

According to an advantageous characteristic, the fuse body comprises material clearances, these clearances being arranged at least on either side of each breakable part.

Thus, a slight radial play of mounting the mechanical fuse is present on the transmission shaft, this game to position a new replacement mechanical fuse in the various possible angular positions and this even if there has been a slight damage to the second part of the mechanical connection at the level of the supports of the breakable parts sectioned during a previous break.

According to an advantageous characteristic of the invention, the at least one breakable part comprises a mechanical breaking zone, the mechanical breaking zone has a first width smaller than a second width of the corresponding breakable part.

Thus, the breakable portion comprises a portion of lower mechanical strength, facilitating its sectioning.

According to an advantageous characteristic of the invention, the motor assembly comprises an electronic control unit, the control unit comprising electronic monitoring means, in particular means for detecting an abutment force, intended to stop the motor. when forces detected at the electric motor or on the mechanical link exceed a predetermined threshold.

Thus, the electronic monitoring means, associated with the mechanical fuse, provide protection of the motor assembly against forces having variable values.

The present invention aims, in a second aspect, a home automation system comprising at least one flap and a motorization assembly according to the invention.

This home automation system has characteristics and advantages similar to those described above in relation to the motorization assembly according to the invention, as mentioned above.

• la figure 1 est une vue en perspective d'une installation domotique comprenant un volet battant motorisé,
• la figure 2 est une représentation schématique d'un ensemble de motorisation conforme à l'invention en configuration montée,
• la figure 3 est une vue schématique d'une unité électronique de commande d'un ensemble de motorisation conforme à l'invention,
• la figure 4 est une vue de côté d'une partie d'un module électromécanique d'un ensemble de motorisation conforme à un premier mode de réalisation de l'invention,
• la figure 5 est une vue de côté d'une partie d'un module électromécanique d'un ensemble de motorisation conforme à un premier mode de réalisation de l'invention.
• la figure 6 est une vue en coupe partielle d'une partie d'un module électromécanique d'un ensemble de motorisation conforme à un premier mode de réalisation de l'invention,
• la figure 7 est une vue en coupe partielle d'une partie d'un module électromécanique d'un ensemble de motorisation conforme à un premier mode de réalisation de l'invention,
• la figure 8 est une vue en coupe partielle d'une partie d'un module électromécanique d'un ensemble de motorisation conforme à un deuxième mode de réalisation de l'invention,
• la figure 9 est une vue d'un détail d'un module électromécanique d'un ensemble de motorisation conforme à l'invention,
• la figure 10 est une vue d'un détail d'un module électromécanique d'un ensemble de motorisation conforme à l'invention,
• la figure 11 est une vue d'ensemble d'une partie d'un module électromécanique d'un ensemble de motorisation conforme à l'invention.

The invention will be better understood and other advantages thereof will appear more clearly in the light of the following description of an embodiment of a shutter door motor assembly, given solely as an example. and with reference to the accompanying drawings in which:

• the figure 1 is a perspective view of a home automation system comprising a motorized shutter,
• the figure 2 is a schematic representation of an engine assembly according to the invention in mounted configuration,
• the figure 3 is a schematic view of an electronic control unit of a motorization assembly according to the invention,
• the figure 4 is a side view of a portion of an electromechanical module of a motorization assembly according to a first embodiment of the invention,
• the figure 5 is a side view of a portion of an electromechanical module of a motorization assembly according to a first embodiment of the invention.
• the figure 6 is a partial sectional view of a portion of an electromechanical module of a motorization assembly according to a first embodiment of the invention,
• the figure 7 is a partial sectional view of a portion of an electromechanical module of a motorization assembly according to a first embodiment of the invention,
• the figure 8 is a partial sectional view of a portion of an electromechanical module of a motorization assembly according to a second embodiment of the invention,
• the figure 9 is a view of a detail of an electromechanical module of an engine assembly according to the invention,
• the figure 10 is a view of a detail of an electromechanical module of an engine assembly according to the invention,
• the figure 11 is an overview of a portion of an electromechanical module of a motorization assembly according to the invention.

The Figures 1 and 2 show a domotic installation 100 of swing shutter installed at an opening 2 of a building 3, for example an opening with a window not shown. The installation comprises a motor assembly 1 attached to a lintel 4, above the opening 2. The opening 2 is equipped with a flap 5 consisting of two leaves or leaves 5a and 5b pivotable on hinges 6a , 6b so as to cover the opening 2 or to leave it uncovered, as shown in this figure. The motor assembly 1 comprises a finishing cap 10 covering part of the various components of the motor assembly 1. The motor assembly 1 thus controls a shutter installation with a main leaf 5a comprising a cover blade 7 or cover and a secondary wing 5b. The main leaf 5a must be driven first at the opening and last at the closing to ensure that the cover blade 7 is good cover the secondary leaf 5b.

The motor assembly 1 comprises a first electromechanical module M1 provided with a first electric motor MA and an electronic control unit 20, a second mechanical module M2 provided with a second electric motor MB. The electronic control unit unit 20 is in electrical connection with the two motors MA, MB. Each module M1, M2 also comprises a mechanical transmission device 8a, 8b, in particular a gearset transmission device, for transmitting the movements respectively provided by the motors MA, MB to the leaves 5a, 5b. Arms 9a, 9b connect the transmission devices 7a, 7b to the leaves 5a, 5b to transmit the rotational movement of the motor MA, MB corresponding to a movement of the leaf 5a, 5b around its hinges 6a, 6b. The mechanical connection is noted between the electric motor MA, MB and the corresponding leaf 5a, 5b, in the assembled configuration of the motorization device.

Upon receipt of a shutter movement control command, the electronic control unit 20 controls the activation of the two motors MA, MB in a sequence comprising a time shift between the activation of the priority motor MA and the secondary motor. MB: during an opening command of the shutter 5, the priority motor MA is the motor activated first, the secondary motor MB being activated with a time offset To with respect to the secondary motor MB, while on closing, the priority motor MA is activated second, with a time offset Tf relative to the secondary motor MB, the offsets at the opening and closing being equal or different.

Preferably, the electromechanical module M1 is associated with the main leaf 5a and the mechanical module M2 is associated with the secondary leaf 5b. In a case of reverse mounting (the priority motor MA being associated with the control of the secondary leaf 5b, the secondary motor MB being respectively associated with the main leaf, 5a), it is then necessary to invert the piloting sequence, that is, to say, to reverse the priorities associated with both engines. This priority inversion can be configured and stored in a memory (not shown) of the electronic control unit 20.

In the case of the motorization of a single flap leaf, the motor assembly 1 comprises an electromechanical module M1 comprising an electric motor MA and an electronic control unit 20.

The motor assembly 1 according to the invention, in particular the electronic control unit 20, comprises hardware and / or software means governing the control of the MA, MB motors. The software means include computer programs.

The electronic control unit, represented at figure 3 is powered on the commercial electricity network, for example 230V AC or on another energy source such as a battery and / or a solar panel. The electronic unit 20 comprises an electronic card 30 on which are implanted the electronic control components of the two motors, in particular a microprocessor 31 comprising information inputs and outputs intended for controlling the MA, MB motors, a receiver 21, in particular of the radio frequency type, for receiving control commands from a remote control point 110, in particular a radio remote control or a wired remote control connected to the control unit 20, a human-machine interface comprising a display digital 22, simple control buttons (opening, closing, stop - alternating or sequential -, programming) 23 and / or one or more light-emitting diodes 24. The Human-Machine interface is optionally accessible at the time of installation but is no longer (or hardly) once the finishing cap 10 of the motor assembly 1 is positioned on the modules M1, M2. The buttons 23 can be used for the manual control of the motors MA, MB and the pairing or association between the electronic control unit 20 and the remote control point 110.

The electronic control unit 20 further comprises means for detecting a thrust force DBE. These can act by measuring torque, torque variation or under-speed. If a predetermined threshold C1 of torque or torque variation is exceeded, the electronic control unit 20 cuts off the power supply to the motor. The electronic control unit 20 may also include position counting means (not shown).

The motor assembly 1 also comprises a frame 40 on which the mechanical modules M1 and electromechanical M2 are fixed. According to a first embodiment, the frame 40 comprises two independent frame members 40a, 40b, which can be fixed to the lintel 4 of the opening 2. According to a second embodiment, the frame 40 is a one-piece frame, made to measure for an opening 2. The length of the frame 40 is then adapted to the width of the opening 2. The two electromechanical modules M1 and M2 are mechanically installed independently on the frame 40.

The chassis 40 visible to figure 4 and 5 is a metal support, in the form of a plate, comprising a flat base 42, intended to be fixed against the lintel 4 and an opposite face 43 provided with slides 45, 46, 47.

The flat base 42 of the frame 40 comprises fixing holes (not shown), these being intended for the passage of fixing screws (not shown) making it possible to fix the frame on the lintel 4.

The slides 45, 46, 47 serve to guide and maintain a module M1 or M2 of the motor assembly 1 on the frame 40 when the latter is fixed in position to the lintel 4; The frame 40 thus comprises a central slideway 46 and two parallel lateral rails 45, 47.

• d'une paroi de fond 45f, 46f, 47f réalisée notamment par la plaque formant support du châssis 40,
• de parois latérales 45z, 46z, 47z s'étendant perpendiculairement à la face opposée 43 du châssis 40,
• de parois de recouvrement 45y, 46y, 47y s'étendant perpendiculairement aux parois latérales, en direction l'une de l'autre, de sorte à refermer partiellement la glissière 45, 46, 47.

The slides 45, 46, 47 are open at their two longitudinal ends, but they could also be closed on one of their ends, for example by an additional piece 55 attached at the end of frame 40. They extend along the axis of the largest length of the frame 40. The slides 45, 46, 47, on the model of the slide 45, form rails whose largest section I45 can accommodate a screw head 65t. Each slideway 45, 46, 47 consists of:

• a bottom wall 45f, 46f, 47f made in particular by the support plate of the frame 40,
• lateral walls 45z, 46z, 47z extending perpendicular to the opposite face 43 of the frame 40,
• covering walls 45y, 46y, 47y extending perpendicularly to the side walls, towards each other, so as to partially close the slideway 45, 46, 47.

The various walls 45f, 45z, 45y of the slideway 45 thus form a U-rail slightly closed on itself, leaving free a longitudinal opening, between the covering walls 45y, whose width i45 is smaller than the width I45 of the rail formed by the slide 45 and therefore lower than said screw head 65t. The slides 46 and 47 are constructed substantially on the same model as the slideway 45. The lateral slides 45, 47 each further comprise a wall 48, 49 extending in the extension of one of the side walls, on the edges of the frame 40. These walls 48, 49 form a guide for the mechanical module M2 or electromechanical M1 to be mounted on the frame 40. The screws 65, 66, 67 whose heads 65t, 66t, 67t can slide in the slideways are fixed on the module to be mounted on the frame member, as shown in figure 4 . Thus, the screws 65, 66, 67 form suspension means for the module M1 or M2 in the frame 40.

Once fixed, the frame is locked in rotation and in translation, thus making it possible to support the torques used during the transmission of the mechanical force between the motors and leaves flaps shutters. The frame 40 or the independent frame members 40a, 40b are fixed at the zone where the main forces are found during operation of the motor assembly 1.

The following description is similar for both modules, only one will be described with reference to Figures 6 and 7 .

The module M1 comprises a housing 60 supporting the motor MA, the transmission device 8a and the arm 9a. The housing 60 may be in several parts assembled to each other by appropriate fixing means 63. The housing also supports an output shaft 70 of the transmission device 8a, hereinafter referred to as the transmission shaft. The arm 9 is mounted on this shaft 70 by means of a washer 71 and a fixing screw 72. The face of the housing supporting the arm 9 is called top 32 of the housing while the opposite is called base 61 of the housing .

The housing 60 also comprises at least three fastening screws 65, 66, 67, offset relative to one another in the length and width of the housing 60. On the representation of the figure 6 two aligned screws 66 are shown. These cooperate with the same central slide 46.

Before the first installation of the electromechanical module M1 on the chassis 40, it is placed in such a way that the base 61 of the housing faces the slideways 45, 46, 47.

When sliding the electromechanical module M1 along the slides 45, 46, 47 of the frame 40, the screws 65, 66, 67 are angularly locked by the hexagonal shape of their head 65t, 66t, 67t and bear against the housing 60 , in particular are abutting abutments 120, 121 of the housing 60. The face of the housing 60 opposite to that supporting the arm 9a thus moves in abutment on the outside of the slides, because of the spacing provided by the abutments. 120, 121, when the module slides in the chassis 40.

These fastening screws 65, 66, 67 pass through the module and can therefore be clamped by the top 63 of the housing supporting the arm 9a, for example by means of corresponding nuts (or socket nuts) 75, 76, 77 , thus making it possible to block the module in rotation and in translation with respect to the frame element. The screws 65, 66, 67 and tightening nuts 75, 76, 77 are distributed around the transmission shaft 70, so as to also distribute the attachment points of the electromechanical module M1 on the frame 40. A significant tightening torque on each screw 65, 66, 67 causes a translation thereof towards the housing 60 and crushing or deformation of the stops 120, 121. The screws 65, 66, 67 then come into contact with the slideways 45, 46, 47 of the chassis 40 which locks the position of the electromechanical module M1. The attachment of the mechanical module M2 occurs in the same way.

Once the modules M1 and M2 are fixed, the corresponding arms 9a, 9b are free to move in rotation to drive the leaves 5a, 5b.

During a particularly strong force exerted on one of the leaves 5a, 5b, for example under the effect of a gust of strong wind, the arm is rotated independently of the engine, which has the effect of creating a significant torque at the link between the arm 9a, 9b and the corresponding transmission shaft 70.

The motor assembly comprises a mechanical fuse 200, installed on the mechanical link LM between the electric motor MA, MB and the corresponding leaf 5a, 5b. A mechanical fuse is equivalent to a device for breaking a kinematic chain, here the mechanical link LM between the motor and the flap. The mechanical link LM comprises a first portion LM1 and a second portion LM2, the mechanical fuse 200 being interposed between the two parts LM1, LM2 of the mechanical link LM. In particular, the mechanical fuse 200 is inserted between the transmission shaft 70 and the arm 9a, 9b. The mechanical fuse 200 participates in the mechanical transmission between the motor MA, MB and the leaf 5a, 5b in an assembled configuration of the motor assembly, and is configured to break this mechanical connection LM during the application of a force greater than a predefined force, for example in case of exceeding a predefined force, for example a torque in said breaking rotation C2 at the mechanical fuse 200. For this purpose, it could be installed between each engine MA, MB and the corresponding arm 9a, 9b, other than between the transmission shaft 70 and the arm 9a, 9b. In the first embodiment shown in Figures 4 to 7 the mechanical fuse 200 is integrally formed with the arm 9a, 9b. The arm 9a, 9b and the mechanical fuse 200 are fixed to the transmission shaft by the washer 71 and the fixing screw 72.

In a second embodiment, represented at figure 8 , the mechanical fuse 200 is an independent part of the arm 9a, 9b, secured to the arm by appropriate means (not shown) blocking the mechanical fuse 200 in rotation relative to the arm 9a, 9b.

The mechanical fuse 200 comprises a fuse body 202 and one or more breakable parts 211, 212, 213, 214 under the application of a break torque C2. This breaking torque can be between 180 Nm and 250 Nm, for example of the order of 200 Nm, or of the order of 230 Nm.

According to the representations of Figures 6 to 11 the fuse body 202 is a substantially annular body having a central opening. The fuse body is possibly a part of the arm 9a, 9b itself. The mechanical fuse 200 comprises a plurality of breakable portions 211, 212, 213, 214 in the form of tabs, attached to the fuse body 202 and extending from an edge of the opening to the inside of the opening of the body of the fuse body. fuse 202. The breakable parts of the fuse are connected to the fuse body by a mechanical breaking zone 231, 232, 233, 234. Each mechanical break zone 231, 232, 233, 234 may have a first width Izr equal to or lower than a second width Ip of the part breakable 211, 212, 213, 214 corresponding. The widths Izr of the different mechanical breaking zones 231, 232, 233, 234 of the mechanical fuse 200 are all equal. However, they could be different. The free ends of the breakable portions 211, 212, 213, 214, not connected to the fuse body, are rounded.

The transmission shaft 70 comprises housing so-called receiving areas 221, 222, 223, 224, for example in the form of grooves, corresponding at least to each breakable portion 211, 212, 213, 214 of the mechanical fuse 200. These grooves 221, 222, 223, 224 are formed by milling into the solid end of the drive shaft 70. Each receiving zone or groove 221, 222, 223, 224 is adapted to receive a breakable portion 211, 212, 213 , 214 of the mechanical fuse 200 in an assembled configuration of the mechanical fuse 200 on the transmission shaft 70. Thus, the mechanical fuse 200, can be assembled without play, or with a controlled clearance, with the transmission shaft 70, in inserting the breakable portions 211, 212, 213, 214 in the form of tabs in the grooves 221, 222, 223, 224 corresponding along a longitudinal axis of the transmission shaft. The cooperation of the breakable parts 211, 212, 213, 214 and grooves 221, 222, 223, 224 ensures the rotational drive of the arm by the transmission shaft in normal operation.

The motor assembly 10, in particular the transmission shaft 70, also comprises one or more housings called receiving zones 241, 242, 243, 244 of the breakable part or parts of the mechanical fuse 200 after breaking. These receiving zones 241, 242, 243, 244 lie in the extension of the grooves 221, 222, 223, 224 accommodating the breakable portions 211, 212, 213, 214 or at least partially coincide with the grooves of the shaft. transmission 70. The motor assembly 10 thus comprises receiving areas 221, 222, 223, 224 of the breakable portions 211, 212, 213, 214 of the mechanical fuse 200 and the receiving zones 241, 242, 243, 244 of these breakable parts after rupture, the receiving zones being offset at least partially relative to the reception areas 221, 222, 223, 224. As shown in FIGS. Figures 6 to 11 , the length of the grooves I22 is greater than the length I21 of the breakable parts 211, 212, 213, 214, which makes them capable of forming the receiving zones 241, 242, 243, 244 of the breakable parts 211, 212, 213, 214 of the mechanical fuse 200 after rupture.

When the forces related to the movement of the leaf 5a, 5b are below the predetermined threshold C1 or the breaking torque C2, the cooperation of the grooves and breakable zones in the form of legs causes the rotation of the arm 5a, 5b under the action of the corresponding MA or MB engine.

When applying a large force on one of the leaves 5a, 5b, the torque exerted at the fuse exceeding the predetermined breaking torque C2, the breakable part or parts of the fuse are mechanically detached from the fuse body, move freely at a distance from fuse body 202 and are housed in the receiving zone or zones 241, 242, 243, 244 provided for this purpose. The release of this or these breakable parts of the mechanical fuse 200 releases the rotation between the arm and the drive shaft 70. The arm thus rotates empty and no longer runs the motor or the transmission device and damage them . This prevents one of the severed severed parts from remaining in contact with the fuse body 202 and thus also risks damaging the arm 9a, 9b and / or the transmission shaft 70. In the same manner, if the broken fuse parts are evacuated and are prevented from getting caught between the arm and the transmission shaft, it is avoided to maintain a rotational drive of the undesired drive shaft 70, during or after the breaking force. This unwanted training would indeed be with play in subsequent cycles, which would lead to malfunctions.

Similarly, the rounded free end of the breakable portions 211, 212, 213, 214 facilitates the sliding of the severed portion in the groove after rupture and thus a better evacuation of the sectioned portion in the receiving zone. This also limits the risk of jamming of the severed portion in the corresponding groove. In the case of one end of the breakable portions 211, 212, 213, 214 comprising angles, in particular right angles, the angles can penetrate into the material constituting the transmission shaft and the breakable parts 211, 212, 213, 214 can get stuck across the grooves of the shaft: the movement between the drive shaft and the arm is no longer free. The dimensions of the breakable portions 211, 212, 213, 214 are also involved in sliding from the reception area to the receiving area. Indeed, the guidance of the breakable part once cut is all the easier as the length of the breakable portion is important relative to the width of the grooves. Alternatively, if the width of a breakable portion is much less than that of the corresponding groove, which corresponds to the presence of a controlled clearance between the mechanical fuse 200 and the drive shaft 70), the length of the breakable portion being close to the width of the groove, the breakable portion will have a tendency to break before touching a wall of the groove. It can easily be evacuated to the corresponding reception area.

To facilitate the free rotation of the moving parts on either side of the mechanical fuse 200, here the arm 9a, 9b and the transmission shaft 70, the mechanical breaking zone 231, 232, 233, 234 is located outside of the circle C70 in which the transmission shaft 70 is circumscribed. The severing of breakable portions 211, 212, 213, 214 under the action of a large mechanical force causes a rupture thereof, but the surface of the rupture zone is generally uneven and rough. It is therefore preferable that it is outside and away from the circle C70 in which the transmission shaft is circumscribed. This avoids Damage to the drive shaft when the arm or drive shaft moves after breaking.

The breakable parts 211, 212, 213, 214 are regularly distributed or not around the mechanical fuse 200, in particular inside the fuse body 202 and are connected to the fuse body by mechanical break zones 231, 232, 233 , 234 of smaller section, that is to say of smaller thickness or smaller width Izr. This reduced width can be obtained by molding or by laser cutting. Alternatively, the section of the mechanical rupture zones 231, 232, 233, 234 is equal to the section of the breakable parts.

The breaking torque C2 for the mechanical fuse 200 depends on the number of breakable parts, their positioning relative to the fuse and the section of the rupture zone 231, 232, 233, 234. The use of four grooves made by removal of material in the solid end of the transmission shaft allows a very simple manufacturing industrial operation, by two orthogonally milled cutters. The grooves 221, 222, 223, 224 extend along orthogonal diameters of the transmission shaft 70 and open on either side of the transmission shaft 70. However, the break torque C2 can be adapted. especially by using only part of the grooves. The embodiment thus comprises three breakable parts distributed unevenly within the fuse body 202, while the number of grooves 221, 222, 223, 224 is four. One of the grooves is empty when mounting the mechanical fuse 200 on the transmission shaft 70. The three breakable parts could alternately be evenly distributed at 120 ° to each other, however, the method for obtaining the grooves (or areas of receiving the broken parts of the fuse) corresponding, also at 120 ° from each other, would then be more complex.

The zone of attachment of the breakable portions 211, 212, 213, 214 to the fuse body 202 can be confused with the mechanical rupture zone 231, 232, 233, 234. Alternatively, the mechanical rupture zone 231, 232, 233, 234 may be slightly shifted towards the center of the fuse body 202, as long as it remains outside the circle C70 in which the transmission shaft is circumscribed.

The fuse body 202 has an irregular inner periphery, including material clearance zones 204 at least on either side of the breakable portions 211, 212, 213, 214 attached to the fuse body 202. This clearance of material can be present even in the area where should be the breakable portion 214, omitted to adapt the break torque C2. This release of material 204 allows a slight radial play of mounting of the mechanical fuse 200 on the drive shaft 70, this clearance for positioning a new mechanical fuse 200 replacement in the various possible angular positions and this even if there has been a slight damage to the drive shaft 70 (at the supports of the 3 breakable parts severed during a previous movement).

According to a first embodiment, the mechanical fuse 200 is integrally formed with the arm 9a, 9b. In case of over-stress causing the rupture of the mechanical fuse 200, only the arm 9a, 9b is to be replaced: it is a simple and inexpensive mechanical part. The integration of the mechanical fuse 200 in the arm 9a, 9b allows simplification of manufacture and assembly. The material used for the arm 9a, 9b and therefore for the mechanical fuse 200 has interesting properties in terms of resistance and plastic behavior. It is indeed important that the mechanical fuse 200 has little or no plastic deformation before breaking, so as to avoid introducing a game in rotation (due to plastic deformation) in the transmission chain.

According to a second embodiment not shown, the mechanical fuse 200 is an independent piece, for example coupled to the arm 9a, 9b and to the transmission shaft so as to transmit the movement in normal operation between the two parts of the drive train . In case of over-stress causing the rupture of the mechanical fuse 200, only the mechanical fuse 200 is to be replaced. However, its design is more complex because it must incorporate coupling means, including means for coupling to the arm 9a, 9b.

Ideally, the mechanical fuse 200 is formed of high tensile steel (HLE S500 or S700), material for which the break occurs quickly after the beginning of the plastic deformation. The material selected for the drive shaft is the most resistant as possible: eg hardened and tempered steel. The mechanical fuse 200 can be made by molding and rectified by laser: the laser-cut shape, for example, makes it possible to refine the section or the width or the thickness of the zones of mechanical rupture 231, 232, 233, 234 and is realized in order to limit the heating by passing the laser beam in close areas and in a short period of time. The figure 9 dashed shows material withdrawals 206a, 206b, reducing the section of the rupture zone 233.

Since the motor assembly can be suspended from a lintel above an opening, an arm holding member 9a, 9b on the transmission shaft must be provided, which retains the connection between the arm 9a, 9b and the transmission shaft 70 including in case of rupture of the mechanical fuse 200. This holding element may take the form of the fixing screw 72, screwed into a corresponding thread 73 provided in the transmission shaft 70 and the washer 71.

According to a particularly advantageous embodiment, a specific washer 71 is used. The washer includes several staggered sections 71e, 71E. In other words, a first section 71e in the center of the washer 71 has a thickness less than a second section 71E corresponding to its outer periphery. When mounting the arm 9a, 9b and the mechanical fuse 200 on the drive shaft 70, the washer 71 is placed in close contact preferably with the arm 9a, 9b on the thicker section 71E. This makes it possible to limit the axial clearance between the transmission shaft 70 and the arm 9a, 9b. At the same time, neither the first section 71e nor the second section 71E of the washer 71 are in contact with the breakable parts 211, 212, 213, 214 of the mechanical fuse 200. Indeed, it is avoided to tighten the washer 71 on the breakable portions 211, 212, 213, 214 of the mechanical fuse 200. Clamping on the breakable parts indeed disturb the value of the break torque C2 randomly (it would be dependent on the torque that is random). In addition, the presence of a clearance between the washer and the breakable portions 211, 212, 213, 214 leaves them free to move (axially and radially) to the receiving areas when they are cut. The washer 71 must be mounted so as to leave an axial clearance between its thinner section and the fuse, in line with the breakable parts 211, 212, 213, 214. The washer 71 is preferably symmetrical, that is to say to say that it is staged on both sides. This simplifies the assembly in that no constraint on the mounting direction of the washer must be imposed.

In the case where there is a controlled game between the fuse and the drive shaft, it must be caught when arriving in abutment in normal operation. When stopping in the intermediate position, the presence of the washer 71, or an equivalent Belleville washer, exerting an axial force tightening the arm 9a, 9b and the transmission shaft 70 can generate a sufficient stress to avoid a relative movement of the arm 9a, 9b relative to the transmission shaft 70. This prevents the flaps 5 are slammed under the effect of an external force as wind.

The sections of mechanical break zones 231, 232, 233, 234 may all be identical. Alternatively, the sections of different breaking zones 231, 232, 233, 234 of the mechanical fuse 200 are different, the breaking torque C2 then being different for different breakable parts 211, 212, 213, 214. This makes it possible to favor parts of 200 mechanical fuse that will break before others. It is thus possible to control the order of rupture of the breakable portions 211, 212, 213, 214 of the mechanical fuse 200. The various breaks can be successively and rapidly linked to the same event leading to a break. This gradually reduces the stresses at the transmission shaft 70 or the motor MA, MB during the breaking event. Alternatively, the breaking of a breakable portion 211, 212, 213, 214 without breaking another reduces the breaking torque necessary to cut the remaining breakable parts. The motor assembly is thus protected during successive breaking events.

The invention is described above relating to the attachment of a frame member to a lintel, a lintel being generally defined as an architectural support element of materials of a wall above an opening in a building. It is similarly applicable to the attachment of the frame members in the lower position of the opening, that is to say at a threshold of the opening. The terms linteau and threshold both correspond to an architectural element of an opening.

Claims (15)

A swing shutter motor assembly (10) comprising at least a first electromechanical module (M1), the first electromechanical module (M1) comprising at least a first electric motor (MA), the motor assembly comprising at least one mechanical connection (LM) comprising a first part (LM1) and a second part (LM2), the mechanical connection (LM) comprising a mechanical transmission device (8a, 8b), a transmission shaft (70) at the output of the mechanical transmission device (8a, 8b), an arm (9a, 9b), the first electric motor (MA) being configured to be connected, in the assembled configuration of the motor assembly, via the mechanical link (LM) and to a leaf (5a, 5b) of the flap (5) so to drive the leaf (5a, 5b) during the electrical activation of the first electric motor (MA), characterized in that the mechanical connection (LM) further comprises a mechanical fuse (200), the mechanical fuse (200) comprising a fuse body (202), connected to the first part (LM1) of the mechanical connection (LM) and at least one breakable part (211, 212, 213, 214) connected to the fuse body (202), the at least one breakable portion being configured to cooperate with a receiving zone (221, 222, 223, 224) of the second portion (LM2) of the mechanical link (LM). Motorization assembly (10) according to claim 1, characterized in that the at least one breakable part (211, 212, 213, 214) is capable of being detached from the fuse body (202) under the application of a force greater than a predetermined force value (C2). Motor assembly (10) according to claim 2, characterized in that the second part (LM2) of the mechanical connection (LM) comprises a receiving zone (241, 242, 243, 244) able to receive the at least a part splitting (211, 212, 213, 214) of the mechanical fuse (200) after its detachment from the fuse body (202). Motorization assembly (10) according to the preceding claim, characterized in that the arm (9a, 9b) is integral with the fuse body and the breakable part (s) (211, 212, 213, 214) and in that the drive shaft comprises the receiving area (221, 222, 223, 224) and the receiving areas (241, 242, 243, 244) of the breakable portions (211, 212, 213, 214) of the mechanical fuse (200) after rupture, or vice versa. Motorization assembly (10) according to the preceding claim, characterized in that it comprises a washer (71) and a fixing screw (72) holding the arm (9a, 9b) and the mechanical fuse (200) on the shaft transmission (70), the washer comprising stepped sections (71e, 71E) of different thicknesses, the smaller section being located at right of the at least one breakable portion (211, 212, 213, 214) of the fuse mechanical (100). Motorization assembly (10) according to the preceding claim, characterized in that the staggered sections of the washer (71) comprise an inner annular section of smaller thickness than an outer annular section, the outer annular section being in contact with the body fuse (202). Motorization assembly (10) according to one of the preceding claims, characterized in that the mechanical fuse (200) comprises a plurality of breakable parts (211, 212, 213, 214), each breakable part cooperating with a reception area (221, 222, 223, 224) of the second part (LM2) of the mechanical link (LM). Motor assembly (10) according to one of the preceding claims, characterized in that the fuse body (202) comprises a central opening, in that the at least one breakable part (211, 212, 213, 214) is a tab connected to the fuse body (202), the tab extending from an edge of the central opening to the center of the opening. Motorization assembly (10) according to the preceding claim, characterized in that the at least one breakable portion (211, 212, 213, 214) has a rounded free end. Motorization assembly (10) according to one of claims 8 to 9, characterized in that the number of breakable parts (211, 212, 213, 214) is three, distributed regularly inside the opening of the body fuse (202). Motorization unit (10) according to one of claims 8 to 10, characterized in that the number of breakable parts (211, 212, 213, 214) is three, distributed unevenly within the opening of the fuse body (202), while the number of home areas (221, 222, 223, 224) is four. Motor assembly (10) according to one of claims 8 to 11, characterized in that the fuse body (202) comprises material clearances (204), these clearances (204) being disposed at least on either side of each breakable portion (211, 212, 213, 214). Motorization assembly (10) according to one of the preceding claims, characterized in that the at least one breakable part (211, 212, 213, 214) comprises a mechanical breaking zone (231, 232, 233, 234), the mechanical breaking zone (231, 232, 233, 234) has a first width (Izr) smaller than a second width (Ip) of the corresponding breakable portion (211, 212, 213, 214). Motor assembly (10) according to one of the preceding claims, characterized in that it comprises an electronic control unit (20), the control unit (20) comprising electronic monitoring means (DBE), in particular means for detecting a thrust force intended to stop the electric motor (MA) when forces detected at the electric motor (MA) or at the mechanical link (LM) exceed a predetermined threshold (C1). Home automation system (100) comprising at least one swing flap (5) and a motor assembly (10) according to any one of the preceding claims, assembled to the flap (5).

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