Electromechanical actuator and shading device comprising such an electromechanical actuator

Abstract

The invention relates to an actuator (11) comprising a reducer (19), a spring-operated brake (25), which is arranged between a first stage (37) and another stage (39) of the reducer (19), and a centering shaft (71). Each of the stages (37, 39) includes a planet carrier (66). The shaft (71) is mounted within a bore (74) of the planet carrier (66). The brake (25) comprises an input member (50) and an output member (51). The shaft (71) is housed inside a bore (72) of the input member (50) with a first clearance (J1) and inside a bore (73) of the output member (51) with a second clearance (J2). The first stage (37) comprises a bushing (76) mounted within the bore (74) of the planet carrier (66) of the first stage (37) with an interference fit. Furthermore, the centering shaft (71) is mounted within a bore (77) of the bushing (76) with a clearance fit.

Description

[0001] DESCRIPTION

[0002] TITLE: Electromechanical actuator and shading device comprising such an electromechanical actuator

[0003] The present invention relates to an electromechanical actuator for a blackout device, in other words an electromechanical actuator of a blackout device.

[0004] The present invention also relates to a blackout device comprising a screen driven in movement by such an electromechanical actuator.

[0005] In general, the present invention relates to the field of blackout devices comprising a motorized drive device moving a screen, between at least a first position and at least a second position.

[0006] A motorized drive device includes an electromechanical actuator of a movable closing, obscuring or sun protection element such as a shutter, a door, a grille, a blind or any other equivalent material, hereafter referred to as a screen.

[0007] We already know of document CN 202 431 792 U, which describes an electromechanical actuator for a blinding device. The electromechanical actuator comprises a housing, an electric motor, a gearbox, a spring brake, and a centering shaft. The electric motor, gearbox, and spring brake are mounted inside the housing. The gearbox comprises a first reduction stage, a second reduction stage, and a third reduction stage. The spring brake is located between the first and second reduction stages. Each of the first, second, and third reduction stages includes a planet carrier, a sun gear, and a plurality of planet gears. The spring brake comprises a helical spring, a drum, an input member, and an output member. The drum includes a friction surface. The friction surface is configured to cooperate with at least one turn of the helical spring.The input member includes a bore. The output member includes a bore. Furthermore, the centering shaft is mounted inside the bore of both the input member and the output member. The third-stage reduction planet carrier includes a bore. The centering shaft is mounted inside the bore of the third-stage reduction planet carrier.

[0008] Furthermore, in this CN 202 431 792 U document, the output member of the spring brake and the solar pinion of the second reduction stage are a single unit, so the bore of the output member and the bore of the solar pinion of the second reduction stage are common and form a single bore. However, this electromechanical actuator has the drawback that, when assembling the reducer with the spring brake, the output member is not centered relative to the input member inside the spring brake until the centering shaft is inserted into the bore of the input member, the bore of the output member, and the bore of the solar pinion of the second reduction stage.

[0009] In addition, the press fitting of the centering shaft into the bore of the solar pinion of the second reduction stage and into the bore of the spring brake input member constrains the operation of the spring brake, which may cause operating noise and / or degrade its efficiency.

[0010] Furthermore, the centering shaft is not inserted into a bore of the planet carrier of the first reduction stage, since the input member of the spring brake is coupled to the planet carrier of the first reduction stage by a trilobe-shaped coupling.

[0011] Therefore, the centering shaft does not allow the planet carrier of the first reduction stage to be centered relative to the second and third reduction stages, which may cause operating noise in the reducer and / or degrade its efficiency.

[0012] We also know of document EP 2 182 244 A1, which describes an electromechanical actuator for a shading device. The electromechanical actuator comprises a housing, an electric motor, a gearbox, and a brake. The electric motor, gearbox, and brake are mounted inside the housing. The gearbox comprises a first reduction stage and at least one other reduction stage. The first reduction stage comprises a planet carrier, a sun pinion, a plurality of planet pinions, a first bearing, and a second bearing. The planet carrier comprises a first bore, a second bore, and a third bore. The first and second bearings are mounted inside the first and second bores of the planet carrier of the first reduction stage, respectively. The sun pinion of the first reduction stage comprises a shaft.The solar pinion shaft of the first reduction stage is guided by the first and second bearings of the first reduction stage's planet carrier. This electromechanical actuator generally performs satisfactorily.

[0013] This document is silent on a common centering shaft for the first reduction stage and at least one other reduction stage, as well as on the type of brake.

[0014] Furthermore, the second bearing, which supports the solar pinion of the first reduction stage and is positioned opposite the brake, has only one bore to receive the shaft of this solar pinion. Moreover, the shaft of the solar pinion of the first reduction stage passes completely through the second bearing.

[0015] Therefore, the second bearing is not configured to support a centering shaft passing through at least one other reduction stage.

[0016] Furthermore, when the brake is placed between two reduction stages of the reducer, an input shaft of the brake is engaged in the third bore of the planet carrier of the first reduction stage and not in a bore of the second bearing.

[0017] The present invention aims to resolve the aforementioned drawbacks and to provide an electromechanical actuator for a blackout device, as well as a blackout device comprising such an electromechanical actuator, enabling improved guidance of the reduction stages of the reducer, so as to minimize vibrations during electrical activation of the electromechanical actuator and, consequently, the operating noise of the latter, while avoiding contact between the centering shaft and the components of the spring brake.

[0018] In this respect, the present invention relates, according to a first aspect, to an electromechanical actuator for a blackout device, the electromechanical actuator comprising at least:

[0019] - a crankcase,

[0020] - an electric motor,

[0021] - a reducer, the reducer comprising a first reduction stage and at least one other reduction stage,

[0022] - a spring brake, the spring brake being disposed between the first reduction stage and the other reduction stage, and

[0023] - a centering shaft, the electric motor, the reducer and the spring brake being mounted inside the housing, each of the first and subsequent reduction stages comprising at least:

[0024] - a planet carrier, the planet carrier comprising at least one first bore, the centering shaft being mounted inside the first bore of the planet carrier of the other reduction stage,

[0025] - a solar gable, and

[0026] - a plurality of satellite gears, the spring brake comprising at least:

[0027] - a helical spring,

[0028] - a drum, the drum comprising a friction surface, the friction surface being configured to cooperate with at least one turn of the helical spring,

[0029] - an input member, the input member comprising at least one bore, and

[0030] - an output member, the output member comprising at least one bore.

[0031] According to the invention, the centering shaft is housed inside the bore of the input member with a first operating clearance and inside the bore of the output member with a second operating clearance. The first reduction stage further comprises a first bearing, the first bearing having at least one first bore. The first bearing is mounted inside the first bore of the planet carrier of the first reduction stage with an interference fit. Furthermore, the centering shaft is mounted inside the first bore of the first bearing with a loose fit.

[0032] Thus, this construction of the electromechanical actuator, where the centering shaft is guided by the first bearing mounted in the first bore of the planet carrier of the first reduction stage and where the centering shaft is mounted without any contact with the spring brake, in particular with the input and output members at the level of their respective bores, makes it possible to improve the guidance of each of the reduction stages of the reducer, so as to minimize vibrations during the electrical activation of the electromechanical actuator and, consequently, the operating noise of the latter.

[0033] In this way, the spring brake is decoupled from the centering shaft and allows the torque supplied by the electric motor to be transmitted through its input and output components, while avoiding a force that would alter the isostaticity of the spring brake.

[0034] Therefore, this construction of the reducer with the spring brake makes it possible to avoid transmitting stresses from the reducer to the spring brake, thus eliminating sources of vibration that could generate operating noise during the electrical activation of the electromechanical actuator.

[0035] According to an advantageous feature of the invention, the first bearing further comprises a second bore. The solar pinion of the first reduction stage comprises a shaft. Furthermore, the shaft of the solar pinion of the first reduction stage is mounted inside the second bore of the first bearing with a free fit.

[0036] According to another advantageous feature of the invention, the centering shaft is mounted inside the first bore of the planet carrier of the other reduction stage with a tight fit.

[0037] According to another advantageous feature of the invention, the first-stage reduction planet carrier further comprises:

[0038] - a second bearing, the second bearing comprising a bore, and - a second bore.

[0039] The second bearing is mounted inside the second bore of the first reduction stage's planet carrier with an interference fit. The first reduction stage's solar pinion includes a shaft. Furthermore, the shaft of the first reduction stage's solar pinion is mounted inside the second bearing's bore with a loose fit.

[0040] According to another advantageous feature of the invention, the planet carrier of the first reduction stage comprises a first part and a second part. The first part is assembled with the second part. The first bore of the planet carrier of the first reduction stage is formed in the second part.

[0041] According to another advantageous feature of the invention, the planet carrier of the first reduction stage comprises a plurality of beams. The assembly of the first part with the second part of the planet carrier is achieved via these beams. The planet carrier of the first reduction stage further comprises shafts. In addition, a planet gear is mounted for free rotation on each of the shafts of the planet carrier of the first reduction stage.

[0042] According to another advantageous feature of the invention, the planet carrier of the other reduction stage is made by means of a plate and shafts, the shafts being fixed to the plate. In addition, a planet gear is mounted freely for rotation on each of the shafts of the planet carrier of the other reduction stage.

[0043] According to another advantageous feature of the invention, the solar pinion of the other reduction stage includes a bore. Furthermore, the centering shaft is mounted inside the bore of the solar pinion of the other reduction stage with a free fit.

[0044] According to another advantageous feature of the invention, the centering shaft is made of a metallic material.

[0045] The present invention relates, according to a second aspect, to a blocking device, the blocking device comprising at least:

[0046] - a screen, and

[0047] - an electromechanical actuator according to the invention and as mentioned above, the screen being driven in movement by the electromechanical actuator.

[0048] This obscuring device has characteristics and advantages similar to those described above, in relation to the electromechanical actuator according to the invention. Other features and advantages of the invention will become apparent in the following description, made with reference to the accompanying drawings, given by way of non-limiting examples, in which:

[0049] [Fig 1] Figure 1 is a schematic cross-sectional view of an installation comprising a blackout device according to an embodiment of the invention;

[0050] [Fig 2] Figure 2 is a schematic perspective view of the installation illustrated in Figure 1;

[0051] [Fig 3] Figure 3 is a schematic perspective view of an electromechanical actuator according to the invention and belonging to the occulting device illustrated in Figures 1 and 2, this schematic view being interrupted locally at the level of a part of the electromechanical actuator;

[0052] [Fig 4] Figure 4 is a schematic cross-sectional view of the electromechanical actuator illustrated in Figure 3, along a cutting plane passing through an axis of rotation of the electromechanical actuator, this schematic cross-sectional view being interrupted locally at several parts of the electromechanical actuator;

[0053] [Fig 5] Figure 5 is a schematic perspective and exploded view of part of the electromechanical actuator illustrated in Figures 3 and 4;

[0054] [Fig 6] Figure 6 is a schematic cross-sectional view of a reducer and spring brake of the electromechanical actuator illustrated in Figures 3 to 5, along the cutting plane passing through the axis of rotation of the electromechanical actuator, this view corresponding approximately to detail IV in Figure 4;

[0055] [Fig 7] Figure 7 is a larger scale view of the left part of Figure 6;

[0056] [Fig 8] Figure 8 is a larger scale view of the right-hand side of Figure 6;

[0057] [Fig 9] Figure 9 is a schematic perspective and exploded view of a first reduction stage of the electromechanical actuator reducer illustrated in figures 3 to 8;

[0058] [Fig 10] Figure 10 is a schematic perspective and exploded view of a spring brake of the electromechanical actuator illustrated in figures 3 to 8;

[0059] [Fig 11] Figure 11 is a first schematic cross-sectional view of the spring brake illustrated in Figures 4 to 7 and 10, along the cutting plane passing through the axis of rotation of the electromechanical actuator illustrated in Figures 3 to 8; [Fig 12] Figure 12 is a second schematic cross-sectional view of the spring brake illustrated in Figures 4 to 7, 10 and 11, along a cutting plane perpendicular to the axis of rotation of the electromechanical actuator illustrated in Figures 3 to 8; and

[0060] [Fig 13] Figure 13 is a schematic perspective and exploded view of the second and third reduction stages of the electromechanical actuator reducer illustrated in Figures 3 to 8.

[0061] First, with reference to Figures 1 and 2, we describe an installation 6 comprising a closing, shading, or solar protection device 3 according to an embodiment of the invention. This installation 6, installed in a building B, has an opening 1, in which a window or door (not shown) is located. This installation 6 is equipped with a screen 2 belonging to the closing, shading, or solar protection device 3, in particular a motorized blind.

[0062] The closing, shading, or sun protection device 3 is hereinafter referred to as the "shading device." The shading device 3 comprises the screen 2.

[0063] The blackout device 3 may be a blind, in particular a blind comprising a roller fabric, a blind comprising a pleated or honeycomb screen, or a blind with adjustable slats, or a roller shutter. The present invention applies to all types of blackout devices.

[0064] Here, installation 6 includes the blackout device 3.

[0065] With reference to figures 1 and 2, a roller blind conforming to an embodiment of the invention is described.

[0066] The occulting device 3 includes a motorized drive device 5. The motorized drive device 5 includes an electromechanical actuator 11 illustrated in figures 3 and following.

[0067] The screen 2 is configured to be moved, in other words is moved, by means of the motorized drive device 5 and, more particularly, of the electromechanical actuator 11.

[0068] Advantageously, the motorized drive device 5 and, consequently, the shading device 3 further includes a winding tube 4. In addition, the winding tube 4 is arranged so as to be driven in rotation by the electromechanical actuator 11.

[0069] Here, the screen 2 is rollable onto the winding tube 4. Thus, the screen 2 of the blackout device 3 is rolled onto the winding tube 4 or unrolled around it, the winding tube 4 being driven by the motorized drive device 5, in particular by the electromechanical actuator 11.

[0070] In this way, screen 2 is mobile between a rolled-up position, particularly high, and an unrolled position, particularly low, and vice versa.

[0071] The screen 2 of the shading device 3 is a closing, shading and / or sun protection screen, rolling and unrolling around the winding tube 4, the inner diameter of which is greater than the outer diameter of the electromechanical actuator 11, so that the electromechanical actuator 11 can be inserted into the winding tube 4, when assembling the shading device 3.

[0072] Advantageously, the occultation device 3 includes a holding device 9, 23.

[0073] Advantageously, the retaining device 9, 23 can include two supports 23. One support 23 is disposed at each end of the winding tube 4, particularly in an assembled configuration of the blackout device 3.

[0074] Thus, the winding tube 4 is held by means of the supports 23. Only one of the supports 23 is visible in figure 1 and they are not shown in figure 2. The supports 23 allow the blackout device 3 to be mechanically linked to the structure of building B, in particular to a wall M of building B.

[0075] Advantageously, the retaining device 9, 23 can include a box 9. In addition, the winding tube 4 and at least part of the screen 2 are housed inside the box 9, particularly in the assembled configuration of the blackout device 3.

[0076] Generally, the box 9 is positioned above the opening 1, or in the upper part of the opening 1.

[0077] Here and as illustrated in figure 1, the supports 23 are also housed inside the box 9.

[0078] Advantageously, the box 9 includes two cheeks 10, as illustrated in figure 2. One cheek 10 is arranged at each end of the box 9, in particular in the assembled configuration of the occultation device 3.

[0079] Alternatively, shown in Figure 2, the winding tube 4 is held via the box 9, in particular via the cheeks 10 of the box 9, without using supports, such as the supports 23 mentioned above.

[0080] Advantageously, the blackout device 3 can also include two side guides 26, as illustrated only in Figure 2. Each side guide 26 includes a groove 29. Each groove 29 of one of the side guides 26 cooperates, or is configured to cooperate, with a side edge 2a of the screen 2, particularly in the assembled configuration of the blackout device 3, so as to guide the screen 2, when the screen 2 is wound and unwound around the winding tube 4.

[0081] The electromechanical actuator 11 is, for example, of the tubular type. This allows the winding tube 4 to be rotated around an axis of rotation X, so as to move, in particular unwind or wind up, the screen 2 of the occulting device 3.

[0082] In an assembled state of the occulting device 3, the electromechanical actuator 11 is inserted into the winding tube 4.

[0083] Advantageously, the blackout device 3 further includes a load bar 8 to exert tension on the screen 2.

[0084] The roller blind, which forms the blackout device 3, comprises a fabric, forming the screen 2 of the roller blind 3. A first end of the screen 2, in particular the upper end of the screen 2, in particular in the assembled configuration of the blackout device 3, is fixed to the roller tube 4. In addition, a second end of the screen 2, in particular the lower end of the screen 2, in particular in the assembled configuration of the blackout device 3, is fixed to the weight bar 8.

[0085] Here, the canvas forming screen 2 is made from a textile material.

[0086] In one embodiment, not shown, the first end of the screen 2 has a hem through which a rod, particularly made of plastic, is inserted. This hem at the first end of the screen 2 is created by stitching the fabric forming the screen 2. When assembling the screen 2 onto the roller tube 4, the hem and the rod at the first end of the screen 2 are slid into a groove on the outer face of the roller tube 4, specifically along the entire length of the roller tube 4, so as to secure the screen 2 to the roller tube 4 and to allow the screen 2 to be wound and unwound around the roller tube 4.

[0087] The method of attaching the screen 2 to the winding tube 4 is not limiting and may vary. It may be implemented, for example, by means of adhesive or one or more joints fixed, in particular by screwing or riveting, to the winding tube 4.

[0088] Regardless of the embodiment, the first end of the screen 2 is positioned at the level of the retaining device 9, 23.

[0089] In the case of a roller blind, the rolled-up high position corresponds to a predetermined upper limit position, or to the weight bar 8 of the screen 2 being pressed against an edge of the casing 9 of the roller blind 3, and the rolled-up low position corresponds to a predetermined lower limit position, or to the weight bar 8 of the screen 2 being pressed against a threshold 7 of the opening 1, or to the complete unrolling of the screen 2.

[0090] Advantageously, the motorized drive device 5 is controlled by a control unit. The control unit can be, for example, a local control unit 12 or a central control unit 13.

[0091] Advantageously, the local control unit 12 can be connected, via wired or wireless connection, to the central control unit 13.

[0092] Advantageously, the central control unit 13 can control the local control unit 12, as well as other similar local control units distributed throughout building B.

[0093] The motorized drive device 5 is preferably configured to execute movement commands, including unwinding or rolling, of the screen 2 of the shading device 3, which may be issued, in particular, by the local control unit 12 or the central control unit 13.

[0094] Installation 6 comprises either the local control unit 12, or the central control unit 13, or the local control unit 12 and the central control unit 13.

[0095] We now describe in more detail and with reference to figures 3 to 13 the motorized drive device 5, including the electromechanical actuator 11, belonging to the installation 6 and, more particularly, to the occulting device 3 illustrated in figures 1 and 2.

[0096] The electromechanical actuator 11 comprises a housing 17, in particular tubular, an electric motor 16 and a reducer 19.

[0097] Here, the housing 17 extends along the axis of rotation X.

[0098] Here, the electric motor 16 and the reducer 19 are mounted, in other words are housed, inside the casing 17, in particular in an assembled configuration of the electromechanical actuator 11.

[0099] Advantageously, the electric motor 16 comprises a rotor 16a and a stator 16b, as illustrated in Figure 4.

[0100] Here, the rotor 16a and the stator 16b are positioned coaxially around the axis of rotation X, which is also the axis of rotation of the winding tube 4 in the mounted configuration of the motorized drive device 5.

[0101] Advantageously, the electric motor 16 can be of the electronically commutated brushless type, also called "BLDC" (acronym for the Anglo-Saxon term BrushLess Direct Current) or "permanent magnet synchronous", of the direct current type or of the asynchronous type.

[0102] Advantageously, the rotor 16a of the electric motor 16 includes a shaft 53.

[0103] Here, the housing 17 is hollow. The housing 17 comprises a first end 17a and a second end 17b. The second end 17b is opposite the first end 17a.

[0104] Here, the housing 17 of the electromechanical actuator 11 is cylindrical in shape, in particular of revolution around the axis of rotation X, and is open at each of its ends 17a, 17b.

[0105] Advantageously, the housing 17 is a tube with a circular cross-section.

[0106] Here, the housing 17 is made of a metallic material.

[0107] The material of the electromechanical actuator housing is not limited and can vary. In particular, it can be a plastic material.

[0108] Control means for the electromechanical actuator 11, enabling the movement of the screen 2 of the occulting device 3, consist of at least one control unit 15, in particular an electronic control unit.

[0109] This control unit 15 belongs to the motorized drive device 5 and, more particularly, to the electromechanical actuator 11 and is capable of starting up the electric motor 16 of the electromechanical actuator 11 and, in particular, of enabling the supply of electrical energy to the electric motor 16.

[0110] Thus, the control unit 15 controls, in particular, the electric motor 16, so as to open or close the screen 2, as described previously.

[0111] The control means for the electromechanical actuator 11 include hardware and / or software means.

[0112] As a non-limiting example, the hardware may include at least one microcontroller 30, as illustrated in Figure 2.

[0113] Advantageously, the control unit 15 comprises a first electronic board 15a, as illustrated in figure 4, and a second electronic board, not shown.

[0114] Advantageously, the control unit 15 further includes a first communication module 27, as illustrated in Figure 2, in particular for receiving control orders, the control orders being issued by an order transmitter, such as the local control unit 12 or the central control unit 13, these orders being intended to control the motorized drive device 5.

[0115] Advantageously, the first communication module 27 of the control unit 15 is wireless. In particular, the first communication module 27 is configured to receive radio control commands.

[0116] Advantageously, the first communication module 27 can also allow the reception of command orders transmitted by wired means.

[0117] Advantageously, the electromechanical actuator 11 further includes a radio antenna 120. In addition, the radio antenna 120 is electrically connected, or is configured to be electrically connected, to the control unit 15 and, consequently, to the first communication module 27, particularly in the assembled configuration of the electromechanical actuator 11.

[0118] Here, the radio antenna 120 is made of a wire, specifically a metallic one, which could be, for example, copper or aluminum. Furthermore, this wire is covered with electrical insulation, that is to say, it is housed in an electrical insulation sheath, which could be, for example, made of plastic. Moreover, the wire forming the radio antenna 120 is partially located outside the electromechanical actuator 11, as can be seen in Figure 3.

[0119] In another variant, not shown, the 120 radio antenna is made using a coaxial cable.

[0120] In another variant, not shown, the radio antenna 120 is made by means of a printed circuit board, which can, for example, be integrated into one of the electronic boards, 15a or equivalent, of the control unit 15.

[0121] Advantageously, the control unit 15, the local control unit 12 and / or the central control unit 13 can be in communication with a weather station, not shown, located inside building B or outside building B, including, in particular, one or more sensors that can be configured to determine, for example, temperature, brightness, or wind speed, in the case where the weather station is located outside building B.

[0122] Advantageously, the control unit 15, the local control unit 12 and / or the central control unit 13 can also be in communication with a server 28, as illustrated in Figure 2, so as to control the electromechanical actuator 11 according to data made available remotely via a communication network, in particular an internet network that can be connected to the server 28.

[0123] The control unit 15 can be operated from the local control unit 12 and / or the central control unit 13. The local control unit 12 and / or the central control unit 13 is equipped with a control keypad. The control keypad of the local control unit 12 or the central control unit 13 includes one or more selection elements 14 and, optionally, one or more display elements 34.

[0124] By way of example, and not exhaustively, selection elements can be push buttons and / or touch-sensitive keys. Display elements can be light-emitting diodes and / or a display, for example LCD (Liquid Crystal Display) or TFT (Thin Film Transistor). Selection and display elements can also be implemented using a touchscreen.

[0125] Advantageously, the local control unit 12 and / or the central control unit 13 includes at least one second communication module 36.

[0126] Thus, the second communication module 36 of the local control unit 12 or of the central control unit 13 is configured to transmit, in other words, sends out, control orders, in particular by wireless means, for example radioelectric, and / or by wired means.

[0127] In addition, the second communication module 36 of the local control unit 12 or of the central control unit 13 can also be configured to receive, in other words receives, control orders, in particular through the same means.

[0128] Advantageously, the second communication module 36 of the local control unit 12 or of the central control unit 13 is configured to communicate, in other words, communicates, with the first communication module 27 of the control unit 15.

[0129] Thus, the second communication module 36 of the local control unit 12 or of the central control unit 13 exchanges control orders with the first communication module 27 of the control unit 15, either unidirectionally or bidirectionally.

[0130] Advantageously, the local control unit 12 is a control point, which can be fixed or mobile. A fixed control point can be a control box intended to be fixed to a wall M of building B or to the face of a window or door frame. A mobile control point can be a remote control, a smartphone, or a tablet.

[0131] Advantageously, the local control unit 12 and / or the central control unit 13 further includes a controller 35. The motorized drive device 5, in particular the control unit 15, is preferably configured to execute movement commands, in particular closing and opening, of the screen 2 of the shading device 3. These commands can be issued, in particular, by the local control unit 12 or by the central control unit 13.

[0132] The motorized drive device 5 can be controlled by the user, for example by receiving a command order corresponding to a press on the or one of the selection elements 14 of the local control unit 12 or of the central control unit 13.

[0133] Advantageously, the occultation installation 6 also includes at least one sensor, not shown.

[0134] As an addition or alternative, the sensor can be integrated into the weather station.

[0135] Advantageously, the sensor includes at least one second communication module 36, such as that described with reference to the local control unit 12 or the central control unit 13. In addition, the second communication module 36 of the sensor is configured to communicate, that is to say, communicates, with the first communication module 27 of the control unit 15.

[0136] Advantageously, the sensor can be, for example, a light sensor, a temperature sensor, a humidity sensor or a wind sensor.

[0137] Thus, the motorized drive device 5 can also be controlled automatically by receiving a command order corresponding to at least one signal from the sensor.

[0138] In addition or alternatively, the motorized drive device 5 can also be controlled automatically by receiving a command order corresponding to at least one signal from a clock, not shown, of the control unit 15, in particular the microcontroller 30.

[0139] In addition or as an alternative, the sensor and / or the clock can be integrated into the local control unit 12 or the central control unit 13.

[0140] Advantageously, the electromechanical actuator 11 further includes a crown, not shown, which can also be called a sleeve.

[0141] The crown is disposed, or rather configured to be disposed, in the vicinity of the first end 17a of the housing 17, particularly in the assembled configuration of the electromechanical actuator 11. Advantageously, the motorized drive device 5 and, more particularly, the electromechanical actuator 11 further includes an electrical power cable 18, as illustrated in Figures 2 and 4.

[0142] Advantageously, the control unit 15 can be supplied with electrical energy by means of the power supply cable 18 electrically connected to at least one source of electrical power supply, not shown, which may be, for example, an electrical power supply network, in particular from the mains or called "PoE" (acronym for the Anglo-Saxon term Power over Ethernet), in other words a power supply network via Ethernet cable, and / or to a battery, which may be rechargeable, in particular by means of a photovoltaic panel and / or a charger, not shown, or through the electrical power supply network.

[0143] Thus, the power supply cable 18 allows the electromechanical actuator 11, in particular the control unit 15 and the electric motor 16, to be supplied with electrical energy from the source(s) of electrical power supply.

[0144] In a variant illustrated in Figure 4, an electrical power supply source formed by a battery 24 is mounted, in other words is housed, inside the casing 17, particularly in the assembled configuration of the electromechanical actuator 11. In this case, the electrical power cable 18 can be electrically connected to at least one photovoltaic panel and / or charger, not shown.

[0145] Here, the radio antenna 120 is separate from the power supply cable 18.

[0146] Alternatively, not shown, the radio antenna 120 is an integral part of the power supply cable 18. In other words, the power supply cable 18 includes the radio antenna 120.

[0147] Advantageously, the electromechanical actuator 11 further includes an output shaft 20. In addition, the output shaft 20 is disposed, that is to say, is configured to be disposed, in the vicinity of the second end 17b of the housing 17, particularly in the assembled configuration of the electromechanical actuator 11.

[0148] Advantageously, the output shaft 20 is arranged inside the winding tube 4 and at least partly outside the housing 17.

[0149] Advantageously, one end of the output shaft 20 is projecting out of relation to the housing 17 of the electromechanical actuator 11, in particular in relation to the second end 17b of the housing 17 opposite to the first end 17a.

[0150] Advantageously, the output shaft 20 is configured to drive a connecting element, not shown, which is attached to the winding tube 4. The connecting element is, for example, in the form of a wheel. When the electromechanical actuator 11 is switched on, the electric motor 16 and the gearbox 19 drive the output shaft 20 in rotation. In addition, the output shaft 20 drives the winding tube 4 in rotation via the connecting element.

[0151] Thus, the winding tube 4 causes the screen 2 of the occulting device 3 to rotate, so as to open or close the opening 1.

[0152] The electromechanical actuator 11 further includes a spring brake 25.

[0153] The spring brake 25 is configured to brake and / or lock the output shaft 20 of the electromechanical actuator 11 in rotation, so as to regulate the rotational speed of the winding tube 4, when moving the screen 2, and to keep the winding tube 4 locked, when the electromechanical actuator 11 is electrically deactivated.

[0154] The spring brake 25 is mounted, in other words is housed, inside the casing 17 of the electromechanical actuator 11, in particular in the assembled configuration of the electromechanical actuator 11.

[0155] The reducer 19 includes at least two reduction stages 37, 38, 39.

[0156] Here, as illustrated in Figures 4 to 8, the reducer 19 comprises three reduction stages 37, 38, 39. Each of the three reduction stages 37, 38, 39 is of the epicyclic type. The three reduction stages 37, 38, 39 are hereafter referred to as the first reduction stage 37, the second reduction stage 38, and the third reduction stage 39.

[0157] The number of reduction stages in the reducer is not limited. The number of reduction stages can be two or more than four.

[0158] Here and as illustrated in figures 4, 6 and 7, the spring brake 25 is configured to be disposed, in other words is disposed, between the first reduction stage 37 and the second reduction stage 38 of the reducer 19, in particular in the assembled configuration of the electromechanical actuator 11.

[0159] Advantageously, the reducer 19 comprises a first end 19a and a second end 19b. The second end 19b is opposite the first end 19a. The first end 19a of the reducer 19 is positioned opposite the electric motor 16, that is, faces the electric motor 16, particularly in the assembled configuration of the electromechanical actuator 11. Furthermore, the second end 19b of the reducer 19 is positioned opposite the output shaft 20 of the electromechanical actuator 11, that is, faces the output shaft 20 of the electromechanical actuator 11, particularly in the assembled configuration of the electromechanical actuator 11.

[0160] Here, the first reduction stage 37 is located at the first end 19a of the reducer 19. The third reduction stage 39 is located at the second end 19b of the reducer 19. In addition, the second reduction stage 38 is located between the first reduction stage 37 and the third reduction stage 39 and, more specifically, between the spring brake 25 and the third reduction stage 39.

[0161] As shown in Figure 9 for the first reduction stage 37 and in Figure 13 for the second and third reduction stages, each of the first, second and third reduction stages 37, 38, 39 comprises a solar pinion 40 and a plurality of satellite pinions 63.

[0162] Advantageously, the solar gable 40 of the first stage of reduction 37 includes a shaft 59.

[0163] Here, the first and second reduction stages 37, 38 respectively comprise three satellite gears 63, as illustrated in figures 9 and 13. And the third reduction stage 39 comprises four satellite gears 63, as illustrated in figure 13.

[0164] The solar pinion 40 and the satellite pinions 63 of the first reduction stage 37 can be called the first solar pinion and the first satellite pinions. The solar pinion and the satellite pinions of the second reduction stage 38 can be called the second solar pinion and the second satellite pinions. Furthermore, the solar pinion and the satellite pinions of the third reduction stage 39 can be called the third solar pinion and the third satellite pinions.

[0165] We denote X19 an axis of rotation of the reducer 19.

[0166] We note X40 as an axis of rotation of the or each solar pinion 40.

[0167] The rotation axis X40 of the solar pinion 40 coincides with the rotation axis X19 of the reducer 19. Therefore, the rotation axis X40 and the rotation axis X19 are represented by the same axis line in the figures.

[0168] Advantageously, the satellite gears 63 of the first, second and third reduction stages 37, 38, 39 are regularly distributed around the axis of rotation X19.

[0169] The number of planetary gears in the first, second, and third reduction stages is not limited and can vary. A single reduction stage can have two or more planetary gears.

[0170] Here, the solar pinion 40 of the first reduction stage 37 comprises a single tooth 46. Whereas the solar pinion 40 of each of the second and third reduction stages 38, 39 comprises a first part and a second part. The first part of the solar pinion 40 of the third reduction stage 39 comprises a first tooth 42. Furthermore, the second part of the solar pinion 40 of each of the second and third reduction stages 38, 39 comprises a second tooth 64. Alternatively, not shown, the solar pinion 40 of the first reduction stage 37 comprises a first part and a second part. The first part of the solar pinion 40 comprises a first tooth. Furthermore, the second part of the solar pinion 40 comprises a second tooth.

[0171] In an example of an embodiment, as illustrated in Figure 13, for one or each of the reduction stages, in this case for the third reduction stage 39, the second toothing 64 of the second part of the solar pinion 40 is angularly set, in other words does not have an angular offset, with respect to the first toothing 42 of the first part of the solar pinion 40, around the axis of rotation X40 of this solar pinion 40.

[0172] As an alternative, not shown, for one or each of the reduction stages 37, 38, 39, the second toothing 64 of the second part of the solar pinion 40 is angularly offset by half a step relative to the first toothing 42 of the first part of the solar pinion 40, around the axis of rotation X40 of this solar pinion 40.

[0173] Advantageously, in each of the first, second and third reduction stages 37, 38, 39, the solar pinion 40 is meshed, in other words is configured to mesh, with each satellite pinion 63 of this reduction stage 37, 38, 39, in particular in an assembled configuration of the reducer 19.

[0174] Advantageously, in each of the first, second and third reduction stages 37, 38, 39, the satellite gears 63 are identical, at least by groups of satellite gears of a reduction stage 37, 38, 39.

[0175] Advantageously, in each of the first, second and third reduction stages 37, 38, 39, the satellite pinions 63 are eccentric with respect to the axis of rotation X19 of the reducer 19 and, more particularly, with respect to the solar pinion 40 of this reduction stage 37, 38, 39, especially in the assembled configuration of the reducer 19.

[0176] Thus, for a given reduction stage 37, 38, 39, an axis of rotation of each satellite pinion 63 is parallel to, and radially offset from, the axis of rotation X19 of the reducer 19 and, more particularly, parallel to, and radially offset from, the axis of rotation X40 of the solar pinion 40 of this reduction stage 37, 38, 39.

[0177] Advantageously, the reducer 19 further includes an input shaft 43.

[0178] Here and as illustrated in figures 4 to 7 and 9, the shaft 59 of the solar pinion 40 of the first reduction stage 37 constitutes the input shaft 43 of the reducer 19. In other words, the shafts 59 and 43 are formed from one and the same piece.

[0179] In an alternative, not shown, the solar pinion 40 of the first reduction stage 37 is carried by the input shaft 43 of the reducer 19. In this case, the shafts 59 and 43 are two separate parts and are fixed together in rotation, around the axis of rotation X19 of the reducer 19.

[0180] Thus, whatever the example of realization, the solar pinion 40 of the first stage of reduction 37 is integral with the input shaft 43 of the reducer 19.

[0181] Advantageously, the reducer 19 further includes an output shaft 67.

[0182] Advantageously, the output shaft 67 of the reducer 19 is rotationally fixed, in other words is configured to be rotationally fixed, with the output shaft 20 of the electromechanical actuator 11, around the axis of rotation X19 of the reducer 19, in particular in the assembled configuration of the electromechanical actuator 11.

[0183] Here and as illustrated in figure 13, the output shaft 67 of the reducer 19 and the output shaft 20 of the electromechanical actuator 11 have complementary shapes which enable them to be fixed together in rotation, around the axis of rotation X19 of the reducer 19. These complementary shapes are hollow elements and protruding elements.

[0184] The mechanical linkage elements between the output shaft of the reducer and the output shaft of the electromechanical actuator are not limited and may vary. They may be, for example, by elastic snap-fit, press fit, screw or riveting.

[0185] In another variant, not shown, the output shaft 20 of the electromechanical actuator 11 constitutes the output shaft 67 of the reducer 19.

[0186] Advantageously, the input shaft 43 and the output shaft 67 of the reducer 19 are coaxial, that is to say, are configured to be coaxial, particularly in the assembled configuration of the reducer 19.

[0187] Thus, the input shaft 43 and the output shaft 67 of the reducer 19 are arranged along the same axis of rotation X19, which is also the axis of rotation of the reducer 19, in particular in the assembled configuration of the reducer 19.

[0188] Advantageously, the reducer 19 further comprises at least one crown 65. The crown or each of the crowns 65 comprises an internal toothing 60.

[0189] Here, and as illustrated in Figures 4 to 8, 9, and 13, the reducer 19 comprises two ring gears 65. One of the two ring gears 65 is formed by combining a second ring gear from the second reduction stage 38 with a third ring gear from the third reduction stage 39. In this case, the planetary gears 63 of the second and third reduction stages 38, 39 are meshed, that is, configured to mesh, with the same ring gear 65, particularly in the assembled configuration of the reducer 19. In this case, this single ring gear 65 belongs to both the second and third reduction stages 38, 39. Furthermore, in this case, the other of the two ring gears 65 is formed by the first ring gear from the first reduction stage 37. Advantageously, the ring gear(s) 65 are made of either steel or plastic.

[0190] As a non-limiting example, the steel of the crown or each crown is sintered steel.

[0191] As a non-limiting example, the plastic material of the crown or each crown is polybutylene terephthalate, also known as PBT, or polyacetal, also known as POM.

[0192] Alternatively, not shown, one of the two rings 65 is formed by combining a first ring from the first reduction stage 37 with a second ring from the second reduction stage 38. In this case, the planetary gears 63 of the first and second reduction stages 37, 38 are meshed, that is, configured to mesh, with the same ring 65, particularly in the assembled configuration of the reducer 19. In this case, this single ring 65 belongs to both the first and second reduction stages 37, 38. Furthermore, in this case, the other of the two rings 65 is formed by a third ring from the third reduction stage 39.

[0193] Alternatively, and not shown, the reducer 19 comprises three ring gears 65. These three ring gears 65 can be called the first ring gear, second ring gear, and third ring gear. Each planetary gear 63 of each of the first, second, and third reduction stages 37, 38, 39 is meshed, or configured to mesh, with the ring gear 65, specifically with the internal teeth 60 of the ring gear 65, of that reduction stage 37, 38, 39, particularly in the assembled configuration of the reducer 19. In this case, the first, second, and third ring gears 65 belong respectively to one of the first, second, and third reduction stages 37, 38, 39.

[0194] In another variant, not shown, the reducer 19 comprises a single ring gear 65. In this case, the planetary gears 63 of each of the first, second and third reduction stages 37, 38, 39 are meshed, that is to say, are configured to mesh, with the single ring gear 65, in particular with the internal teeth 60 of the single ring gear 65, in particular in the assembled configuration of the reducer 19. In this case, this single ring gear 65 belongs to the first, second and third reduction stages 37, 38, 39.

[0195] Each of the first, second and third reduction stages 37, 38, 39 further includes a satellite carrier 66. Advantageously, the satellite carrier or each 66 is made of either steel or plastic.

[0196] As a non-limiting example, the steel of the satellite carrier(s) is sintered steel.

[0197] As a non-limiting example, the plastic material of the satellite carrier(s) is polybutylene terephthalate, also known as PBT, or polyacetal, also known as POM.

[0198] Advantageously, the planet carrier 66 of the last reduction stage, in this case of the third reduction stage 39, is integral with the output shaft 67 of the reducer 19.

[0199] Thus, the output shaft 67 of the reducer 19 is driven in rotation, in particular via the planet carrier 66 of the third reduction stage 39, when the input shaft 43 of the reducer 19 is driven in rotation, in particular during an electrical activation of the electric motor 16 causing the rotor 16a to be driven in rotation.

[0200] Here, as illustrated in Figures 4, 6, 8, and 13, the planet carrier 66 of the third reduction stage 39 and the output shaft 67 of the reducer 19 form a single piece, which can be manufactured, for example, by sintering. This piece can be made, in particular, from a plastic or a metallic material.

[0201] Alternatively, and not shown, the planet carrier 66 of the third reduction stage 39 and the output shaft 67 of the gearbox 19 form two separate parts. In this case, particularly in the assembled configuration of the gearbox 19, the two parts are connected, or rather configured to be connected, by means of removable fastening elements. By way of non-limiting examples, the fastening elements may be of the snap-fit ​​or screw type.

[0202] Advantageously, the electromechanical actuator 11 further comprises a first cover 44 and a second cover 45. The first cover 44 is disposed at the first end 19a of the reducer 19. Furthermore, the second cover 45 is disposed at the second end 19b of the reducer 19.

[0203] In one embodiment, the first cover 44 and the ring 65 of the first reduction stage 37 form two separate parts, as illustrated in Figures 4 and 5. In addition, the second cover 45 and the ring 65 of the second and third reduction stages 38, 39 form two separate parts, as illustrated in Figures 4 to 6, 8 and 13. In this case, particularly in the assembled configuration of the reducer 19, on the one hand, the first cover 44 and the ring 65 of the first reduction stage 37 and, on the other hand, the second cover 45 and the ring 65 of the second and third reduction stages 38, 39 are connected together, in other words, are configured to be connected together, by means of fastening elements 79, in particular by elastic snap-fit.

[0204] Here, the fixing elements 79 are four in number and arranged at 90° to each other, around the axis of rotation X. Only two fixing elements 79 of the first cover 44 are visible in figure 5 and only two fixing elements 79 of the ring 65 of the second and third reduction stages 38, 39 are visible in figure 13.

[0205] The number and type of fasteners for the first cover with the first-stage reduction ring and for the second cover with the second and third-stage reduction rings are not limited and may vary. For example, there may be two fasteners arranged diametrically opposite each other around the axis of rotation, i.e., 180° apart, or three fasteners arranged at 120° angles to each other around the axis of rotation. These fasteners may also be screw-type or push-fit.

[0206] Alternatively, not shown, the second lid 45 and the crown 65 of the only third stage of reduction 39 form two separate pieces.

[0207] In another variant, not shown, the first cover 44 is integrated into the ring 65 of the first reduction stage 37, so as to form a single piece. Furthermore, the second cover 45 is integrated into the ring 65 of the third reduction stage 39, so as to form a single piece. In this case, the single piece can be produced, for example, by sintering. This piece can be made, in particular, of a plastic or a metallic material.

[0208] In another variant, not shown, the first cover 44 is fixed, or rather configured to be fixed, to the second cover 45 by means of fasteners, particularly in the assembled configuration of the reducer 19. The fasteners may be two elastic snap-fit ​​fasteners arranged diametrically opposite each other with respect to the axis of rotation X, i.e., 180° apart, around the axis of rotation X. The number and type of fasteners are not limited and may vary. For example, there may be three fasteners arranged at an angle of 120° to each other around the axis of rotation. They may also be screw-type or push-fit fasteners.

[0209] Advantageously, the reducer 19 may further comprise a ring, not shown, i.e., a tube. One or each of the first, second, and third reduction stages 37, 38, 39 and, optionally, the spring brake 25 are mounted, i.e., housed, inside the ring, particularly in the assembled configuration of the reducer 19. Furthermore, the ring is mounted, i.e., housed, inside the housing 17, particularly in the assembled configuration of the electromechanical actuator 11.

[0210] Advantageously, the ring is fixed, or rather configured to be fixed, to the housing 17 by means of at least one fixing element, not shown, particularly in the assembled configuration of the electromechanical actuator 11.

[0211] In one embodiment, the ring is fixed to the housing 17 by means of a fixing screw, not shown, passing through a through hole, not shown, made in the housing 17 and screwing into a fixing hole of the ring.

[0212] The number and type of fasteners for attaching the ring to the housing are not limited. There may be, for example, two or more. They may also be, for example, riveted fasteners.

[0213] Advantageously, the electromechanical actuator 11 further includes a device for detecting end of travel and / or obstacle during the movement of the screen 2. This device can be mechanical or electronic.

[0214] Advantageously, the end-of-travel and / or obstacle detection device is implemented by means of the microcontroller 30 of the control unit 15 and, in particular, by means of an algorithm implemented by this microcontroller 30.

[0215] The winding tube 4 is driven in rotation around the axis of rotation X and the housing 17 of the electromechanical actuator 11, supported by two pivot joints. The first pivot joint is located at one end of the winding tube 4 by means of the ring. The ring thus provides a bearing. The second pivot joint, not shown, is located at the other end of the winding tube 4, opposite the first end.

[0216] The crown forms, in other words is configured to form or constitute, a bearing for the rotational guidance of the winding tube 4, around the housing 17, in particular in an assembled configuration of the motorized drive device 5 and, consequently, of the occulting device 3.

[0217] Advantageously, the electromechanical actuator 11 further includes a torque support 21.

[0218] Here, the torque support 21 is located at the first end 17a of the housing 17, particularly in the assembled configuration of the electromechanical actuator 11. The torque support 21 allows the forces exerted by the electromechanical actuator 11, in particular the torque exerted by the electromechanical actuator 11, to be absorbed by the structure of building B. The torque support 21 advantageously also allows the forces exerted by the winding tube 4 to be absorbed, in particular the weight of the winding tube 4, the electromechanical actuator 11 and the screen 2, and ensures that these forces are absorbed by the structure of building B.

[0219] Thus, the torque support 21 allows the electromechanical actuator 11 to be fixed on the retaining device 9, 23, in particular to one of the supports 23 or to one of the cheeks 10 of the casing 9.

[0220] Advantageously, the torque support 21 protrudes at the first end 17a of the housing 17.

[0221] Advantageously, the torque support 21 closes, in other words is configured to close, the first end 17a of the housing 17, particularly in the assembled configuration of the electromechanical actuator 11.

[0222] Furthermore, the torque support 21 can support at least part of the control unit 15.

[0223] Advantageously, particularly in the assembled configuration of the electromechanical actuator 11, the torque support 21 is fixed, or rather configured to be fixed, to the housing 17 by means of first fixing elements 32, 33, in particular by press fitting, and second fixing elements 41, 86, in particular by screwing.

[0224] Here, and as illustrated in Figure 3, the first fastening elements 32, 33 are two grooves 32 formed on the torque support 21, only one of which is visible in Figure 3, and two notches 33 formed in the housing 17, only one of which is visible in Figure 3. The grooves 32, and the notches 33 respectively, are arranged diametrically opposite each other with respect to the axis of rotation X, that is, 180° apart, around the axis of rotation X. Each of the grooves 32 of the torque support 21 is fitted into one of the notches 33 of the housing 17. In addition, the second two fastening elements 41, 86 are a fixing screw 41, a through hole 86 formed in the housing 17, and a screw shank, not shown, formed in the torque support 21. The fixing screw 41 is housed in the through hole 86 of the housing 17 and is screwed into the screwing barrel of the torque support 21.

[0225] The number and type of the first and second mounting elements connecting the torque support to the housing are not limited and may vary. For example, there may be one, two arranged diametrically opposite each other around the axis of rotation (i.e., 180° apart), or three arranged at 120° angles to each other around the axis of rotation. They may also be elastic snap-fit ​​mounting elements. Furthermore, they may consist of a single type of mounting element rather than a combination of different types.

[0226] Advantageously, the torque support 21 comprises a first part 21a, which can also be called a "fixed point", and a second part 21b, which can also be called an "actuator head".

[0227] Advantageously, the first part 21a of the torque support 21 is assembled, or rather configured to be assembled, with the housing 17, particularly in the assembled configuration of the electromechanical actuator 11. Furthermore, the second part 21b of the torque support 21 is configured to be assembled, or rather is assembled, with the retaining device 9, 23, particularly in an assembled configuration of the electromechanical actuator 11 in the concealing device 3.

[0228] In an example embodiment shown in Figure 4, the second part 21b of the torque support 21 is assembled, in other words is configured to be assembled, on the first part 21a of the torque support 21, in particular in the assembled configuration of the electromechanical actuator 11. In this case, the second part 21b of the torque support 21 is assembled on the first part 21a of the torque support 21 by means of assembly elements, not shown.

[0229] Thus, the torque support 21 consists of at least two separate parts, each forming respectively the first and second parts 21a, 21b of the torque support 21.

[0230] In this way, the second part 21b of the torque support 21 can be interchangeable with the first part 21a of the torque support 21, in particular depending on the shape and type of the retaining elements, not shown, of the retaining device 9, 23.

[0231] In another embodiment, the couple support 21 can be made of a single piece forming the first and second parts 21a, 21b of the couple support 21.

[0232] Advantageously, the second part 21 b of the couple support 21 can have different external shapes, including a fluted shape, known as "star-shaped", in other words including reliefs on its contour, or a round shape, in other words without reliefs on its contour, as illustrated in figures 3 and 4.

[0233] Advantageously, at least a portion of the first part 21a of the torque support 21 is generally cylindrical in shape and is disposed, or rather configured to be disposed, inside the housing 17, particularly in the assembled configuration of the electromechanical actuator 11.

[0234] Advantageously, an outside diameter 021 of at least a portion of the second part 21b of the torque support 21 is strictly greater than an outside diameter 017 of the housing 17.

[0235] Advantageously, the torque support 21 further includes a stop 87. In addition, the stop 87 is supported, that is to say, is configured to be supported, against the housing 17, at the level of the first end 17a of the housing 17, in particular in the assembled configuration of the electromechanical actuator 11.

[0236] Thus, the stop 87 of the torque support 21 allows the sinking of the first part 21a of the torque support 21 into the housing 17, along the direction of the axis of rotation X.

[0237] Here, the stop 87 of the torque support 21 includes a shoulder. More specifically, it is made in the form of a collar, in particular cylindrical in shape and with a straight generatrix.

[0238] In one embodiment, the ring is disposed or inserted, in other words is configured to be disposed or inserted, around the torque support 21, in particular the second part 21b of the torque support 21, especially in the assembled configuration of the electromechanical actuator 11. In this case, the ring is mounted freely to rotate around the torque support 21, in particular the second part 21b of the torque support 21.

[0239] Alternatively, not shown, the crown is disposed or inserted, in other words is configured to be disposed or inserted, around a part of the housing 17, in particular in the assembled configuration of the electromechanical actuator 11. In this case, the crown is mounted freely to rotate around the housing 17.

[0240] In another variant, not shown, the ring is disposed or inserted, in other words is configured to be disposed or inserted, on the one hand, around the torque support 21 and, on the other hand, around a part of the housing 17 of the electromechanical actuator 11, in particular the first end 17a of the housing 17, especially in the assembled configuration of the electromechanical actuator 11. In such a case, the ring can be mounted freely in rotation, on the one hand, around the torque support 21 and, on the other hand, around the housing 17 of the electromechanical actuator 11.

[0241] Advantageously, the torque support 21 further includes a cover 22. The cover 22 is mounted, or rather configured to be mounted, on the torque support 21, in particular on the first and / or second parts 21a, 21b of the torque support 21, especially in the assembled configuration of the electromechanical actuator 11.

[0242] Advantageously, the control unit 15 is disposed at least partly inside the housing 17 of the electromechanical actuator 11.

[0243] Furthermore, the control unit 15 can be disposed at least partly outside the housing 17 of the electromechanical actuator 11 and, in particular, mounted in the torque support 21 or in one of the supports 23.

[0244] In one embodiment, the first electronic board 15a of the control unit 15 is arranged inside the housing 17 of the electromechanical actuator 11, particularly in the assembled configuration of the electromechanical actuator 11, as illustrated in Figure 4. Furthermore, the second electronic board is arranged inside the torque support 21 of the electromechanical actuator 11, particularly in the assembled configuration of the electromechanical actuator 11.

[0245] Advantageously, the first electronic board 15a is configured to control the electric motor 16. In addition, the second electronic board is configured to, among other things, access parameterization and / or configuration functions of the electromechanical actuator 11, by means of at least one selection device 61 and, optionally, at least one display device 91, as illustrated in Figure 3.

[0246] Here, the control unit 15, in particular each of the first and second electronic boards 15a and equivalent, is supplied with electrical energy, in particular by means of the power supply cable 18 and / or the battery 24.

[0247] Advantageously, the torque support 21 includes, or integrates, the selection device(s) 61, in particular a button, which may be, for example, of the push-button or magnetic type. Furthermore, the selection device(s) 61 are configured, in particular, to adjust the electromechanical actuator 11 through one or more configuration modes, to pair one or more control units 12, 13 with the electromechanical actuator 11, to reset one or more parameters, which may be, for example, a limit switch position, to reset the paired control unit(s) 12, 13, or to control the movement of the screen 2.

[0248] Advantageously, the torque support 21 includes, in other words integrates, the display device or each display device 91. In addition, the display device or each display device 91 is configured, in particular, to display a visual indication, which may be, for example, representative of an operating mode of the electromechanical actuator 11, in particular a configuration mode or a control mode, or of a state of an element of the motorized drive device 5.

[0249] Advantageously, the electromechanical actuator 11 further includes at least one vibration filtering module 118.

[0250] Here, the vibration filtering module 118 is integrated into the torque support 21.

[0251] Here and as illustrated in figure 4, the vibration filtering module 118 is assembled on the torque support 21 and, more particularly, fixed to the torque support 21, notably by screwing, by means of a fixing screw 119.

[0252] Alternatively, not shown, the vibration filtering module 118 is separated from the torque support 21.

[0253] Advantageously, the electromechanical actuator 11 further includes a torque transmission device 31.

[0254] The torque transmission device 31 is mounted, in other words is housed, inside the casing 17, particularly in the assembled configuration of the electromechanical actuator 11.

[0255] Here, the input shaft 43 of the reducer 19 is coupled, or rather configured to be coupled, with the rotor 16a of the electric motor 16 via the torque transmission device 31, in particular in the assembled configuration of the electromechanical actuator 11.

[0256] Advantageously, the torque transmission device 31 includes a first housing 54. The first housing 54 receives, in other words is configured to receive or to house, a part of the shaft 53 of the rotor 16a of the electric motor 16, in particular in the assembled configuration of the electromechanical actuator 11.

[0257] Here, the part of the shaft 53 of the rotor 16a of the electric motor 16 is in direct contact with the first housing 54 of the torque transmission device 31.

[0258] Alternatively, and not shown, the torque transmission device 31 includes an adapter. The adapter is mounted, or configured to be mounted, on a portion of the shaft 53 of the rotor 16a of the electric motor 16, particularly in the assembled configuration of the electromechanical actuator 11. Mounting can be achieved, for example, by press-fitting the adapter onto the portion of the shaft 53 of the rotor 16a. In this case, the first housing 54 receives, or is configured to receive or house, the portion of the shaft 53 of the rotor 16a of the electric motor 16 via the adapter, particularly in the assembled configuration of the electromechanical actuator 11. Thus, the portion of the shaft 53 of the rotor 16a of the electric motor 16 is in contact with the first housing 54 of the torque transmission device 31 through the adapter.Advantageously, the first housing 54 of the torque transmission device 31 has a first shape, in particular a cross shape. The portion of the shaft 53 of the rotor 16a has a second shape, in particular a flat shape, such as, for example, the free end of a flathead screwdriver. Furthermore, the second shape of the portion of the shaft 53 of the rotor 16a is configured to be inserted, that is, is inserted, into the first shape of the first housing 54 of the torque transmission device 31, in particular in the assembled configuration of the electromechanical actuator 11.

[0259] Alternatively, not shown, the first form of the first housing 54 of the torque transmission device 31 is slot-shaped.

[0260] In another variant, not shown, the first form of the first housing 54 of the torque transmission device 31 includes holes, which may, for example, be two in number. Furthermore, the second form of the shaft portion 53 of the rotor 16a includes pins, such as those in the shape of a fork, which may, for example, be two in number.

[0261] In another variant, not shown, the first shape of the first housing 54 of the torque transmission device 31 is a star or internal tooth shape. Furthermore, the second shape of the shaft portion 53 of the rotor 16a is a complementary star or external tooth shape.

[0262] Advantageously, the torque transmission device 31 includes a second housing 55. The second housing 55 receives, in other words is configured to receive or to house, a part of the solar pinion 40 of the first reduction stage 37, in particular the shaft 59 of the solar pinion 40, especially in the assembled configuration of the electromechanical actuator 11.

[0263] Thus, the torque transmission device 31 allows the torque supplied by the electric motor 16 to be transmitted to the reducer 19, in particular to the first reduction stage 37.

[0264] Alternatively, and not shown, the torque transmission device 31 includes a coupling element. The coupling element is assembled, or rather configured for assembly, inside the second housing 55 of the torque transmission device 31, particularly in the assembled configuration of the electromechanical actuator 11. Furthermore, the coupling element is assembled onto the shaft 59 of the sun pinion 40.

[0265] Advantageously, the electromechanical actuator 11 further includes a counting device 115. The counting device 115 is configured to cooperate, that is to say, cooperates, with the control unit 15. In addition, the counting device 115 and the control unit 15 are configured to determine a position, which may be called "current", of the screen 2.

[0266] Advantageously, the control unit 15 is configured to monitor at least one signal from the counting device 115 at a predetermined frequency, notably depending on the position of the screen 2.

[0267] Here, the counting device 115 is of the magnetic type.

[0268] In such a case, the counting device 115 includes an encoder wheel 116 and one or more sensors 117, in particular Hall effect sensors.

[0269] Here and as illustrated in figure 4, the counting device 115 includes two sensors 117.

[0270] The number of sensors is not limited and can vary. It can be, for example, one or three.

[0271] Here, the encoder wheel 116 is connected to the shaft 53 of the electric motor 16. In addition, the sensor or each sensor 117 is assembled on an electronic board of the control unit 15, in particular on a third electronic board 15c, illustrated only in figure 4, or, alternatively, on the first electronic board 15a.

[0272] Thus, the counting device 115 makes it possible to determine the number of revolutions made by the shaft 53 of the electric motor 16.

[0273] Alternatively, and not shown, the ring gear has teeth on its inner face configured to cooperate with a pinion mounted inside the torque support 21 or, alternatively, inside the housing 17 of the electromechanical actuator 11. In this case, the encoder wheel 116 is connected to the pinion, in particular by means of a shaft. Thus, the teeth of the ring gear are configured to drive the pinion in rotation, so as to count the number of revolutions of the winding tube 4. In this case, the teeth of the ring gear and the pinion form part of the counting device 115.

[0274] In another variant, not shown, the counting device 115 may be without sensors. In this case, the counting device 115 is configured to, in cooperation with the control unit 15, analyze the control signals for the supply of electrical energy to the electric motor 16 and determine a position, which may be called "current", of the rotor 16a of the electric motor 16 and, consequently, of the output shaft 20 of the electromechanical actuator 11 and the winding tube 4.

[0275] Alternatively, not shown, the counting device 115 allows the number of revolutions made by the output shaft 20 of the electromechanical actuator 11 to be determined.

[0276] The counting device 115 also allows the direction of rotation of the winding tube 4 to be determined and / or the end-of-travel positions of the screen 2 to be managed.

[0277] The type of counting device is not limiting and can be different, in particular optical, for example an encoder equipped with one or more optical sensors, or time-based.

[0278] With reference to figures 5 to 13, we now describe in more detail the spring brake 25 and the reducer 19 of the electromechanical actuator 11, as well as the assembly of the reducer 19 with the spring brake 25.

[0279] The spring brake 25 is shown in the opposite direction to Figure 11 with respect to Figures 4 to 7, 10 and 12, along the direction of the axis of rotation X.

[0280] The spring brake 25 includes at least one helical spring 48, a drum 49, an input member 50, an output member 51 and, optionally, a hood 52.

[0281] Advantageously, particularly in the assembled configuration of the electromechanical actuator 11, the drum 49 is positioned, or rather configured to be positioned, relative to the first and second rings 65, by means of first and second indexing elements 110, 111. Only one first indexing element 110 is visible in Figure 5 and only three first indexing elements 110 are visible in Figure 8. Furthermore, only four second indexing elements 111 are visible in Figure 5.

[0282] Here, the first and second indexing elements 110, 111 are rotational locking elements, about the axis of rotation X, having corresponding shapes, such as protruding elements and / or notches. The first indexing elements 110 comprise four protruding elements formed on the drum 49 and arranged at an angle of 90° to each other about the axis of rotation X. The first indexing elements 110 cooperate with four notches formed on the crown 65 of the first reduction stage 37 and arranged at an angle of 90° to each other about the axis of rotation X. Furthermore, the second indexing elements 111 comprise eight protruding elements formed on the drum 49.The second indexing elements 111 cooperate with four other protruding elements provided at the level of the second ring 65 and arranged at an angle of 90° to each other, around the axis of rotation X.

[0283] The number and type of the first and second indexing elements are not limiting and may vary. For example, there may be three of them, arranged at an angle of 120° to each other around the axis of rotation. Advantageously, particularly in the assembled configuration of the electromechanical actuator 11, the drum 49 is held, or rather configured to be held, by the two rings 65, by means of fastening elements 47, 47', in particular by elastic snap-fit, as illustrated in Figures 5 to 7, 9 to 11 and 13.

[0284] Here, the fixing elements 47 between the drum 49 and the ring 65 of the first reduction stage 37 are four in number, of which only two are visible in figure 5 and only three are visible in figure 10, and are arranged at 90° to each other, around the axis of rotation X. In addition, the fixing elements 47' between the drum 49 and the ring 65 of the second and third reduction stages 38, 39 are four in number, of which only one is visible in figure 5 and only two are visible in figure 10.

[0285] The number and type of fastening elements for the drum with the first-stage reduction gear and for the drum with the second and third-stage reduction gears are not limited and may vary. For example, there may be two fasteners arranged diametrically opposite each other around the axis of rotation (i.e., 180° apart), or three fasteners arranged at 120° angles to each other around the axis of rotation. These fasteners may also be screw-type or push-fit.

[0286] Advantageously, the input organ 50 is driven, or rather configured to be driven, in rotation by the electric motor 16.

[0287] Advantageously, the drum 49 and the crown 65 of the first stage of reduction 37 are two separate parts.

[0288] Advantageously, the drum 49 includes a housing 56.

[0289] Here, the housing 56 of the drum 49 is cylindrical in shape. Furthermore, the housing 56 of the drum 49 is open at both its axial ends.

[0290] Advantageously, the helical spring 48, the input member 50, the output member 51 and, possibly, the hood 52 are arranged, or rather configured to be arranged, at least in part inside the housing 56 of the drum 49, especially in the assembled configuration of the spring brake 25.

[0291] Here, the output member 51 is disposed, in other words is configured to be disposed, opposite the input member 50, in a direction parallel to the axis of rotation X, in particular in the assembled configuration of the spring brake 25.

[0292] Here, the helical spring 48 has a plurality of turns.

[0293] The coils of the helical spring 48 are centered on an axis coinciding with the axis of rotation X, when the spring brake 25 is assembled and then mounted in the electromechanical actuator 11. Similarly, the input member 50 and the output member 51 are centered on an axis coinciding with the axis of rotation X, when the spring brake 25 is assembled and then mounted in the electromechanical actuator 11.

[0294] The axis of each of the components 48, 49, 50, 51, 52 of the spring brake 25 is not shown in figures 6, 7 and 10 to 12, in order to simplify the reading of these.

[0295] Here, the drum 49 includes a friction surface 57. The friction surface 57 cooperates, or is configured to cooperate, with at least one turn of the helical spring 48, particularly in the assembled configuration of the spring brake 25.

[0296] Advantageously, the friction surface 57 is an internal surface of the drum 49 delimiting, in other words which delimits, radially the housing 56, in this case on the outside.

[0297] Thus, at least one turn of the helical spring 48 is radially constrained by the housing 56 of the drum 49.

[0298] Here, the helical spring 48 is mounted tightly inside the housing 56 of the drum 49, so as to secure the helical spring 48 and the drum 49 by friction, when the helical spring 48 is at rest.

[0299] Advantageously, the helical spring 48 is formed from a wire 58. The helical spring 48 has close-wound coils, in a rest state of the spring brake 25.

[0300] One end of the helical spring 48 forms a first leg 48a. A second end of the helical spring 48 forms a second leg 48b.

[0301] Thus, the helical spring 48 has two legs 48a, 48b. Only the first leg 48a is visible in figure 12 and only the second leg 48b is visible in figure 10.

[0302] In this embodiment example, the first and second legs 48a, 48b of the helical spring 48 extend radially with respect to the axis of rotation X and inwards from the helical spring 48, in particular from the coils of the helical spring 48 towards the central axis of the helical spring 48, as illustrated in Figures 10 and 12.

[0303] Alternatively, not shown, each of the first and second legs 48a, 48b of the helical spring 48 extends axially with respect to the axis of rotation X, particularly in the assembled configuration of the spring brake 25.

[0304] Advantageously, the input member 50 includes a drive tooth 68.

[0305] Advantageously, the drive tooth 68 extends, in other words is configured to extend, in particular in a direction parallel to the axis of rotation X, between the input member 50 and the hood 52, especially in the assembled configuration of the spring brake 25.

[0306] Advantageously, the drive tooth 68 of the input member 50 is inserted, or rather configured to be inserted, inside the helical spring 48, particularly in the assembled configuration of the spring brake 25.

[0307] Advantageously, the input member 50, in particular the drive tooth 68 of the input member 50, cooperates, in other words is configured to cooperate, with at least one of the first and second legs 48a, 48b of the helical spring 48, in particular in the assembled configuration of the spring brake 25, so as to drive the helical spring 48 in rotation around the axis of rotation X in a first direction of rotation.

[0308] Such a movement releases the spring brake 25 and, more specifically, the helical spring 48 from the drum 49.

[0309] The frictional effort between at least one turn of the helical spring 48 and the friction surface 57 of the drum 49 is reduced when the helical spring 48 is driven into rotation in the first direction of rotation.

[0310] In other words, this movement tends to decrease the diameter of the outer envelope of the helical spring 48 and therefore to decrease the radial stress between the helical spring 48 and the friction surface 57 of the drum 49.

[0311] Thus, the movement generated by the electric motor 16 can be transmitted from the input member 50 to the output member 51.

[0312] The outer envelope of the helical spring 48 is defined by the outer generatrices of the turns of the helical spring 48.

[0313] Advantageously, the output organ 51 includes at least one ear 69a, 69b.

[0314] Here, the output organ 51 comprises a first ear 69a and a second ear 69b. The first and second ears 69a, 69b are visible in Figure 12. Only the first ear 69a is visible in Figure 10. The section in Figure 6 is taken in a plane passing through the first and second ears 69a, 69b.

[0315] Advantageously, each of the first and second ears 69a, 69b of the output organ 51 includes a recess 70. Only the recess 70 of the first ear 69a is visible in figure 10.

[0316] Here, the recess 70 of the or each of the first and second ears 69a, 69b cooperates, in other words is configured to cooperate, with one of the first and second legs 48a, 48b of the helical spring 48, in particular in the assembled configuration of the spring brake 25.

[0317] Advantageously, the first and second lugs 69a, 69b of the output member 51 are arranged symmetrically with respect to the axis of rotation X, so as to ensure balancing of the spring brake 25 during a rotational movement of the input member 50 relative to the output member 51 around the axis of rotation X. Advantageously, the first and second lugs 69a, 69b of the output member 51 are inserted, or configured to be inserted, inside the helical spring 48, particularly in the assembled configuration of the spring brake 25.

[0318] Advantageously, the output member 51, in particular one of the first and second ears 69a, 69b, cooperates, or is configured to cooperate, with at least one of the first and second legs 48a, 48b of the helical spring 48, particularly in the assembled configuration of the spring brake 25, so as to drive the helical spring 48 in rotation about the axis of rotation X in a second direction of rotation. The second direction of rotation is opposite to the first direction of rotation.

[0319] Such a movement activates the spring brake 25, that is to say, it tends to block or brake the rotation of the helical spring 48 inside the housing 56 of the drum 49.

[0320] The frictional effort between at least one turn of the helical spring 48 and the friction surface 57 of the drum 49 is increased when the helical spring 48 is driven in the second direction of rotation.

[0321] In other words, this movement tends to increase the diameter of the outer envelope of the helical spring 48, in particular by bringing the first and second legs 48a, 48b of the helical spring 48 closer together, and therefore to increase the radial stress between the helical spring 48 and the friction surface 57 of the drum 49.

[0322] Advantageously, the spring brake 25 includes a lubricant, not shown, disposed between the helical spring 48 and the friction surface 57 of the drum 49. The lubricant is, preferably, grease.

[0323] Advantageously, particularly in the assembled configuration of the spring brake 25, the first leg 48a of the helical spring 48 cooperates, or is configured to cooperate, with a first face 68a of the drive tooth 68 of the input member 50 and the second leg 48b of the helical spring 48 cooperates, or is configured to cooperate, with a second face 68b of the drive tooth 68 of the input member 50. The second face 68b of the drive tooth 68 is opposite to the first face 68a of the drive tooth 68.

[0324] Thus, the drive tooth 68 of the input member 50 is disposed between the first and second legs 48a, 48b of the helical spring 48 and cooperates, in other words is configured to cooperate, with one or the other of the legs 48a, 48b of the helical spring 48, according to the direction of rotational drive generated by the electric motor 16.

[0325] In this way, the first and second faces 68a, 68b of the drive tooth 68 constitute two drive faces of the helical spring 48. Each drive face 68a, 68b of the drive tooth 68 cooperates, in other words is configured to cooperate, with one of the first and second legs 48a, 48b of the helical spring 48, in particular in the assembled configuration of the spring brake 25.

[0326] Here, the recess 70 of the first ear 69a of the output member 51 cooperates, or is configured to cooperate, with the first leg 48a of the helical spring 48, particularly in the assembled configuration of the spring brake 25. Furthermore, the recess 70 of the second ear 69b of the output member 51 cooperates, or is configured to cooperate, with the second leg 48b of the helical spring 48, particularly in the assembled configuration of the spring brake 25.

[0327] The electromechanical actuator 11 further includes a centering shaft 71.

[0328] The input member 50 includes at least one bore 72.

[0329] The output member 51 includes at least one bore 73.

[0330] The centering shaft 71 is housed, or rather configured to be housed, inside the bore 72 of the input member 50 with a first operating clearance J1 and inside the bore 73 of the output member 51 with a second operating clearance J2, in particular in the assembled configuration of the electromechanical actuator 11, as illustrated in figures 6 and 7.

[0331] Thus, the first operating clearance J1 between the centering shaft 71 and the bore 72 of the input member 50 and the second operating clearance J2 between the centering shaft 71 and the bore 73 of the output member 51 ensure that there is no contact between, on the one hand, the centering shaft 71 and, on the other hand, the input member 50 and the output member 51.

[0332] The satellite carrier 66 of each of the first and third and, possibly, second reduction stages 37, 39, 38 includes a first bore 74.

[0333] The centering shaft 71 is mounted, in other words configured to be inserted or housed, inside the first bore 74 of the planet carrier 66 of the third reduction stage 39 and, possibly, of the second reduction stage 38, particularly in the assembled configuration of the electromechanical actuator 11.

[0334] The first reduction stage 37 further includes a first bearing 76. The first bearing 76 includes at least one first bore 77. The first bearing 76 is mounted, that is to say, is configured to be inserted or housed, inside the first bore 74 of the planet carrier 66 of the first reduction stage 37 with an interference fit, particularly in the assembled configuration of the electromechanical actuator 11 and, more particularly, of the reducer 19. In addition, the centering shaft 71 is mounted, that is to say, is configured to be inserted, inside the first bore 77 of the first bearing 76 with a loose fit, particularly in the assembled configuration of the electromechanical actuator 11 and, more particularly, of the reducer 19.

[0335] The term "interference fit" refers to the assembly of two parts, one comprising a bore and the other being or comprising a shaft, with interference. In other words, the fit is negative, such that there is an interference fit between the bore and the shaft; that is, the shaft has a dimension greater than or equal to that of the bore.

[0336] The term "free fit" means that the assembly of two parts, one comprising a bore and the other being or comprising a shaft, has a clearance. In other words, the fit is positive, such that a radial clearance exists between the bore and the shaft; that is, the shaft has a dimension smaller than that of the bore.

[0337] Thus, this construction of the electromechanical actuator 11, where the centering shaft 71 is guided by the first bearing 76 mounted in the first bore 74 of the planet carrier 66 of the first reduction stage 37 and where the centering shaft 71 is mounted without any contact with the spring brake 25, in particular with the input member 50 and the output member 51 at the level of their respective bores 72, 73, makes it possible to improve the guidance of each of the reduction stages 37, 38, 39 of the reducer 19, so as to minimize the vibrations during the electrical activation of the electromechanical actuator 11 and, consequently, the operating noise of the latter.

[0338] In this way, the spring brake 25 is decoupled from the centering shaft 71 and allows the torque supplied by the electric motor 16 to be transmitted through its input and output members 50, 51, while avoiding a force that would alter the isostaticity of the spring brake 25.

[0339] Therefore, this construction of the reducer 19 with the spring brake 25 makes it possible to avoid transmitting stresses from the reducer 19 to the spring brake 25, so as to eliminate sources of vibration which could generate operating noise, during the electrical activation of the electromechanical actuator 11.

[0340] In addition, the first bearing 76 provided in the first reduction stage 37 ensures precise centering of the centering shaft 71 inside the third reduction stage 39 and, possibly, the second reduction stage 38, arranged between the spring brake 25 and the output shaft 20.

[0341] Furthermore, the centering shaft 71 passes through a major part of the reducer 19, as well as the spring brake 25, and allows the different reduction stages 37, 38, 39 of the reducer 19 to be guided.

[0342] Here, the centering shaft 71 is centered with respect to the axis of rotation X, particularly in the assembled configuration of the electromechanical actuator 11. Advantageously, the centering shaft 71 is made of a metallic material.

[0343] Advantageously, the first bearing 76 is made of bronze.

[0344] The material of the first bearing is not limited and can be different. It can be, for example, sintered steel or a plastic material, such as polyacetal, also called POM, or polytetrafluoroethylene, also called PTFE.

[0345] Here and as illustrated in figures 6 and 7, the first operating set J1 is different from the second operating set J2.

[0346] Here, and in no way limitingly, the first operating clearance J1 is constant along the length of the input member 50, along the direction of the axis of rotation X. Whereas the second operating clearance J2 is variable along the length of the output member 51, along the direction of the axis of rotation X, in particular increasing along a direction from the first reduction stage 37 to the second reduction stage 38.

[0347] Alternatively, not shown, the first operating set J1 is identical to the second operating set J2.

[0348] Advantageously, the first bearing 76 further includes a second bore 78. In addition, the shaft 59 of the solar pinion 40 of the first reduction stage 37 is mounted, that is to say, is configured to be inserted or housed, inside the second bore 78 of the first bearing 76 with a free fit, particularly in the assembled configuration of the electromechanical actuator 11 and, more particularly, of the reducer 19.

[0349] Thus, the first bearing 76 allows to guide, on the one hand, the centering shaft 71 by means of its first bore 77 and, on the other hand, the shaft 59 of the solar pinion 40 of the first reduction stage 37 by means of its second bore 78.

[0350] In this way, the first bearing 76 has two coaxial bearing surfaces, along the axis of rotation X, defined by the first and second bores 77, 78.

[0351] Therefore, the alignment of the centering shaft 71 and the shaft 59 of the solar pinion 40 of the first reduction stage 37 is optimized, since this is achieved by the same part which is the first bearing 76.

[0352] In other words, a chain of ribs of the reducer assembly 19 is simplified by removing a link between the rotation axis X71 of the centering shaft 71 and the rotation axis X40 of the solar pinion 40 of the first reduction stage 37.

[0353] Furthermore, guiding the centering shaft 71 and the shaft 59 of the solar pinion 40 of the first reduction stage 37 by a single bearing, namely the first bearing 76, minimizes the costs of manufacturing the reducer 19. Advantageously, the first bore 74 of the first bearing 76 has a first diameter. The second bore 78 of the first bearing 76 has a second diameter. Moreover, the second diameter differs from the first diameter; in particular, it is strictly larger than the first diameter.

[0354] Thus, the first pad 76 is a so-called "stepped" pad.

[0355] Advantageously, the planet carrier 66 of the first reduction stage 37 comprises a first part 66a and a second part 66b, as illustrated in Figure 9. In addition, the first part 66a is assembled, that is to say, is configured to be assembled, with the second part 66b, in particular in the assembled configuration of the reducer 19.

[0356] Here, the first bore 74 of the satellite carrier 66 of the first reduction stage 37 is provided in the second part 66b of the satellite carrier 66.

[0357] Advantageously, the satellite carrier 66 of the first stage of reduction 37 comprises a plurality of beams 92, that is to say, a plurality of fingers. Furthermore, the assembly of the first part 66a with the second part 66b of the satellite carrier 66 is achieved via the beams 92.

[0358] Here, and as illustrated in Figure 9, the beams 92 are an integral part of the first part 66a of the satellite carrier 66. Each of the beams 92 includes an end pin 93. The second part 66b of the satellite carrier 66 includes bores 94. Furthermore, the end pin 93 of each of the beams 92 is mounted, that is to say, inserted or housed, in one of the bores 94.

[0359] Here, the mounting of the terminal pins 93 of the beams 92 in the bores 94 is implemented by press fitting.

[0360] Advantageously, the planet carrier 66 of the first reduction stage 37 further comprises shafts 95, as illustrated in Figure 9. In addition, a planet gear 63 is mounted free to rotate, that is to say is configured to be mounted free to rotate, on each of the shafts 95, in particular in the assembled configuration of the reducer 19.

[0361] The planet carrier 66 of the first reduction stage 37 therefore includes as many shafts 95 as the number of planetary pinions 63 of the first reduction stage 37, in this case three.

[0362] Here, as illustrated in Figure 9, the shafts 95 are an integral part of the second part 66b of the planet carrier 66. Each of the shafts 95 includes an end pin 96. The first part 66a of the planet carrier 66 includes bores 97. Furthermore, the end pin 96 of each of the shafts 95 is mounted, that is to say, inserted or housed, in the bores 97. Here, the mounting of the end pins 96 of the shafts 95 in the bores 97 is achieved by press fitting.

[0363] Alternatively, not shown, the beams 92 are an integral part of the second part 66b of the satellite carrier 66, instead of the first part 66a, and the shafts 95 are part of the first part 66a of the satellite carrier 66, instead of the second part 66b.

[0364] Advantageously, the planet carrier 66 of the first reduction stage 37 further comprises a second bearing 98 and a second bore 100. The second bearing 98 comprises a bore 99. The second bearing 98 is mounted, that is to say, configured to be inserted or housed, inside the second bore 100 of the planet carrier 66 of the first reduction stage 37 with an interference fit, particularly in the assembled configuration of the electromechanical actuator 11 and, more particularly, of the reduction gear 19. Furthermore, the shaft 59 of the solar pinion 40 of the first reduction stage 37 is mounted, that is to say, configured to be inserted or housed, inside the bore

[0365] 99 of the second bearing 100 with a free adjustment, in particular in the assembled configuration of the electromechanical actuator 11 and, more particularly, of the reducer 19.

[0366] Here, the second bore 100 of the satellite carrier 66 of the first reduction stage 37 is provided in the first part 66a of this satellite carrier 66.

[0367] Advantageously, the ring 65 of the first reduction stage 37 includes a bore 101. In addition, the second bearing 98 is mounted, that is to say, is configured to be inserted or housed, inside the bore 101 of the ring 65 of the first reduction stage 37 with a free fit, particularly in the assembled configuration of the electromechanical actuator 11 and, more particularly, of the reducer 19.

[0368] Thus, the second bearing 98 comprises a first external surface 98a and a second external surface 98b. The first external surface 98a of the second bearing 98 is supported, in other words, is configured to bear against the second bore.

[0369] 100 of the planet carrier 66 of the first reduction stage 37 and the second external surface 98b of the second bearing 98 is supported, in other words is configured to be supported, against the bore 101 of the ring 65 of the first reduction stage 37, particularly in the assembled configuration of the reducer 19.

[0370] Advantageously, the first external surface 98a of the second bearing 98 has a first diameter. The second external surface 98b of the second bearing 98 has a second diameter. Furthermore, the second diameter is different from the first diameter; in particular, it is strictly larger than the first diameter.

[0371] Thus, the second 98 pad is a so-called "shouldered" pad.

[0372] Advantageously, the crown 65 of the first reduction stage 37 comprises a first end 65a and a second end 65b. The second end 65b is opposite the first end 65a.

[0373] Here and as illustrated in figures 5 to 7, the first end 65a of the ring 65 of the first reduction stage 37 is disposed at the level of the first end 19a of the reducer 19 and the second end 65b of the ring 65 of the first reduction stage 37 is oriented towards the second end 19b of the reducer 19, according to the direction of the axis of rotation X19, and, more particularly is disposed opposite the input member 50 of the spring brake 25.

[0374] Advantageously, the first reduction stage 37 further comprises a cover 109. The cover 109 is disposed, or is configured to be disposed, inside the ring 65 of the first reduction stage 37, particularly in the assembled configuration of the reducer 19. Furthermore, the cover 109 closes, or is configured to close, the second end 65b of the ring 65 of the first reduction stage 37, particularly in the assembled configuration of the reducer 19.

[0375] Thus, the hood 109 allows the components 40, 63, 66, 76, 98 of the first reduction stage 37 to be held in position inside the ring 65 of the first reduction stage 37.

[0376] Here, the cover 109 is arranged between the planet carrier 66 of the first reduction stage 37 and the spring brake 25, in particular the first component 50 of the spring brake 25, especially in the assembled configuration of the electromechanical actuator 11.

[0377] Advantageously, the hood 109 includes an opening 112. Furthermore, the opening 112 of the hood 109 is through-hole. The opening 112 of the hood 109 cooperates, or is configured to cooperate, with a portion of the second part 66b of the planet carrier 66 of the first reduction stage 37, particularly in the assembled configuration of the reducer 19.

[0378] Thus, the portion of the second part 66b of the satellite carrier 66 of the first reduction stage 37 is inserted into the opening 112 of the hood 109, so as to extend on either side of the hood 109, in particular in the assembled configuration of the reducer 19.

[0379] Advantageously, the hood 109 is held, or rather configured to be held, by the crown 65 of the first reduction stage 37, by means of fastening elements 113, in particular by press-fitting, as illustrated in figure 9.

[0380] Here, the fixing elements 113 between the hood 109 and the ring 65 of the first reduction stage 37 are four in number and arranged at 90° to each other, around the axis of rotation X. The fixing elements 113 include notches formed on the hood 109, of which only three are visible in figure 9, and grooves, not shown, formed in the ring 65 of the first reduction stage 37.

[0381] The number and type of fasteners for the cover and the first-stage reduction gear are not limited and may vary. For example, there may be two fasteners arranged diametrically opposite each other around the axis of rotation (i.e., 180° apart), or three fasteners arranged at 120° angles to each other around the axis of rotation. These fasteners may also be screw-type or snap-fit.

[0382] Advantageously, the ring 65 of the first reduction stage 37 further comprises an end wall 114. The end wall 114 is disposed at the first end 65a of the first reduction stage 37. In addition, the end wall 114 closes, that is to say is configured to close, the first end 65a of the ring 65 of the first reduction stage 37.

[0383] Thus, the end wall 114 allows the components 40, 63, 66, 76, 98 of the first reduction stage 37 to be held in position inside the ring 65 of the first reduction stage 37.

[0384] Advantageously, the end wall 114 includes an opening 115. Furthermore, the opening 115 of the end wall 114 is through-hole. The opening 115 of the end wall 114 cooperates, or is configured to cooperate, with the shaft 59 of the solar pinion 40 of the first reduction stage 37, particularly in the assembled configuration of the reducer 19.

[0385] Thus, the shaft 59 of the solar pinion 40 of the first reduction stage 37 is inserted into the opening 115 of the end wall 114, so as to extend on either side of the end wall 114, in particular in the assembled configuration of the reducer 19.

[0386] Advantageously, the planet carrier 66 of each of the second and third reduction stages 38, 39 is made by means of a plate 102 and shafts 103. The shafts 103 are fixed to the plate 102. A planet gear 63 is mounted free to rotate, in other words is configured to be mounted free to rotate, on each of the shafts 103, in particular in the assembled configuration of the reducer 19.

[0387] The planet carrier 66 of each of the second and third reduction stages 38, 39 therefore includes as many shafts 103 as the number of planetary pinions 63 of each of the second and third reduction stages 38, 39, in this case three.

[0388] Here, as illustrated in Figures 6, 8, and 13, for the planet carrier 66 of the second reduction stage 38, the shafts 103 and the plate 102 form a single piece. In this case, the planet carrier 66 can be obtained by sintering or by machining.

[0389] Here and as illustrated in figures 6, 8 and 13, for the satellite carrier 66 of the third reduction stage 39, each of the shafts 103 is press-fitted into a bore 104 of the plate 102.

[0390] Thus, the trees 103 are separate parts from the plate 102 for the satellite carrier 66 of the third reduction stage 39.

[0391] Advantageously, the solar pinion 40 of each of the second and third reduction stages 38, 39 includes a bore 75. In addition, the centering shaft 71 is mounted, that is to say, is configured to be inserted or housed, inside the bore 75 of the solar pinion 40 of each of the second and third reduction stages 38, 39, particularly in the assembled configuration of the electromechanical actuator 11.

[0392] Advantageously, the centering shaft 71 is mounted, in other words configured to be inserted or housed, inside the first bore 74 of the planet carrier 66 of the third reduction stage 39 with a tight fit, especially in the assembled configuration of the electromechanical actuator 11.

[0393] Thus, when the electromechanical actuator 11 is electrically activated, the rotational speed of the centering shaft 71 is identical to the rotational speed of the output shaft 67 of the reducer 19, given that the centering shaft 71 is mounted, on the one hand, inside the first bore 77 of the first bearing 76 with a loose fit and, on the other hand, inside the first bore 74 of the planet carrier 66 of the third reduction stage 39 with a tight fit.

[0394] In addition, mounting the centering shaft 71 inside the first bore 74 of the planet carrier 66 of the third reduction stage 39 with a tight fit minimizes a difference in relative rotational speed between the centering shaft 71 and the solar pinion 40 of each of the second and third reduction stages 38, 39.

[0395] In this way, this construction of the reducer 19 makes it possible to eliminate sources of vibration and, consequently, to reduce its operating noise.

[0396] Alternatively, and not shown, the centering shaft 71 is mounted, that is, configured to be inserted or housed, inside the first bore 74 of the planet carrier 66 of the third reduction stage 39 by means of another bearing, particularly in the assembled configuration of the electromechanical actuator 11. In this case, the other bearing also includes a bore. The centering shaft 71 is mounted, that is, configured to be inserted or housed, inside the bore of the other bearing, particularly in the assembled configuration of the electromechanical actuator 11. Furthermore, the other bearing is mounted, that is, configured to be inserted or housed, inside the first bore 74 of the planet carrier 66 of the third reduction stage 39 with an interference fit, particularly in the assembled configuration of the electromechanical actuator 11.

[0397] Advantageously, the centering shaft 71 is mounted, in other words is configured to be inserted or housed, inside the bore 75 of the solar pinion 40 of the second reduction stage 38, as well as of the third reduction stage 39, with free adjustment, particularly in the assembled configuration of the electromechanical actuator 11.

[0398] Thus, the link between the centering shaft 71 and the solar pinion 40 of each of the second and third reduction stages 38, 39 is of the sliding pivot type.

[0399] In this way, the centering shaft 71 allows each of the second and third reduction stages 38, 39 to be guided by means of their respective solar pinion 40.

[0400] Advantageously, the input member 50 includes a coupling interface 88. The planet carrier 66 of the first reduction stage 37 includes a coupling interface 89. In addition, the coupling interface 89 of the planet carrier 66 of the first reduction stage 37 cooperates, or is configured to cooperate, with the coupling interface 88 of the input member 50, particularly in the assembled configuration of the electromechanical actuator 11.

[0401] Here, the coupling interface 89 of the planet carrier 66 of the first reduction stage 37 is an internal gear. The coupling interface 88 of the input member 50 is an external gear. Furthermore, the coupling interface 89 of the planet carrier 66 of the first reduction stage 37 meshes, or is configured to mesh, with the coupling interface 88 of the input member 50, particularly in the assembled configuration of the electromechanical actuator 11.

[0402] Thus, the coupling interface 89 of the planet carrier 66 of the first reduction stage 37 allows to receive and transmit a torque from the electric motor 16 and, in this case, from the first reduction stage 37 to the spring brake 25.

[0403] Advantageously, the output member 51 includes a coupling interface 80. In addition, the coupling interface 80 of the output member 51 cooperates, or is configured to cooperate, with the solar pinion 40 of the second reduction stage 38, particularly in the assembled configuration of the electromechanical actuator 11.

[0404] Thus, the torque supplied by the electric motor 16 is transmitted from the first reduction stage 37 to the second reduction stage 38 via the coupling interface 88 of the input member 50 and the coupling interface 80 of the output member 51. Here, and as illustrated in Figures 10, 11, and 13, the coupling interface 80 of the output member 51 of the spring brake 25 has a trilobed shape. In this case, the sun gear 40 of the second reduction stage 38 lacks a first tooth 42 and has a shape complementary to the coupling interface 80 of the output member 51, as shown in Figure 13.

[0405] Thus, the coupling interface 80 of the output member 51 allows to receive a torque from the electric motor 16 and, in this case, from the spring brake 25, and to transmit it to the second reduction stage 38.

[0406] Alternatively, and not shown, the coupling interface 80 of the output member 51 is an internal toothed surface. Furthermore, the coupling interface 80 of the output member 51 meshes, or is configured to mesh, with the solar pinion 40 of the second reduction stage 38, specifically with a first toothed surface of the solar pinion 40 of the second reduction stage 38, particularly in the assembled configuration of the electromechanical actuator 11. The first toothed surface of the solar pinion 40 of the second reduction stage 38 is advantageously analogous to the first toothed surface 42 of the solar pinion 40 of the third reduction stage 39.

[0407] Advantageously, the satellite carrier 66 of the second reduction stage 38 includes a coupling interface 105. In addition, the coupling interface 105 of the satellite carrier 66 of the second reduction stage 38 cooperates, or is configured to cooperate, with the solar pinion 40 of the third reduction stage 39, particularly in the assembled configuration of the electromechanical actuator 11.

[0408] Here, the coupling interface 105 of the planet carrier 66 of the second reduction stage 38 is an internal toothed gear. Furthermore, particularly in the assembled configuration of the electromechanical actuator 11, the coupling interface 105 of the planet carrier 66 of the second reduction stage 38 meshes, or is configured to mesh, with the solar pinion 40 of the third reduction stage 39, specifically with the first toothed gear 42 of the solar pinion 40 of the third reduction stage 39. In this case, the planet carrier 66 of the second stage 38 lacks a first bore 74.

[0409] Thus, the coupling interface 105 of the satellite carrier 66 of the second reduction stage 38 allows to receive and transmit a torque from the electric motor 16 and, in this case, from the second reduction stage 38 to the third reduction stage 39.

[0410] In one embodiment, the coupling interface 89 of the planet carrier 66 of the first reduction stage 37, the coupling interface 80 of the output member 51 of the spring brake 25, and the coupling interface 105 of the planet carrier 66 of the second reduction stage 38 are different. In this case, the external teeth forming the coupling interface 88 of the input member 50 and the first teeth 42 of the sun pinion 40 of the third reduction stage 39 are different.

[0411] Alternatively, and not shown, the coupling interface 89 of the planet carrier 66 of the first reduction stage 37, the coupling interface 80 of the output member 51 of the spring brake 25, and the coupling interface 105 of the planet carrier 66 of the second reduction stage 38 are identical, specifically having the same internal teeth. Furthermore, the external teeth forming the coupling interface 88 of the input member 50 and the first teeth 42 of the sun pinion 40 of the second and third reduction stages 38 and 39 are identical.

[0412] Advantageously, the coupling interface 89 of the satellite carrier 66 of the first reduction stage 37, the coupling interface 88 of the input member 50, the coupling interface 80 of the output member 51 and the coupling interface 105 of the satellite carrier 66 of the second reduction stage 38 are respectively centered with respect to the axis of rotation X, in particular in the assembled configuration of the electromechanical actuator 11.

[0413] Alternatively, and not shown, the sun gear 40 of the third reduction stage 39 is an integral part of the plate 102 of the second reduction stage 38. In this case, the planet carrier 66, in this instance the plate 102, of the second reduction stage 38 and the sun gear 40 of the third reduction stage 39 form a single piece. Thus, the planet carrier 66 of the second reduction stage 38 lacks the coupling interface 105. Furthermore, the planet carrier 66 of the second stage 38 includes a first bore 74 for the passage of the centering shaft 71.

[0414] Advantageously, the hood 52 includes an opening 81. Furthermore, the opening 81 of the hood 52 is through-hole. The opening 81 of the hood 52 cooperates, or is configured to cooperate, with the coupling interface 80 of the output member 51, particularly in the assembled configuration of the spring brake 25.

[0415] Thus, the coupling interface 80 of the output member 51 is inserted into the opening 81 of the hood 52, so as to extend on both sides of the hood 52, in particular in the assembled configuration of the spring brake 25.

[0416] Advantageously, the input element 50 includes a first tray 82. In addition, the hood 52 includes a second tray 83.

[0417] Advantageously, particularly in the assembled configuration of the spring brake 25, the first leg 48a of the helical spring 48 extends along the first plate 82 of the input member 50 and the second leg 48b of the helical spring 48 extends along the second plate 83 of the hood 52.

[0418] Here, the first chainring 82 is integral with the drive tooth 68, preferably monobloc with it.

[0419] Here and as illustrated in figure 11, the helical spring 48 and the output member 51 are held in axial position between the first plate 82 of the input member 50 and the second plate 83 of the hood 52.

[0420] Here and as illustrated in figures 4, 6, 8 and 13, the output shaft 67 of the reducer 19 is formed by the plate 102 of the planet carrier 66 of the third reduction stage 39.

[0421] In this case, the satellite carrier 66 can be obtained by sintering or by machining.

[0422] Advantageously, the input member 50 and, more particularly, the first plate 82 includes a spacer 84. The spacer 84 is configured to extend, in other words, extends, in particular in a direction parallel to the axis of rotation X, between the input member 50 and the hood 52, in particular in the assembled configuration of the spring brake 25.

[0423] Thus, the spacer 84 of the input member 50 makes it possible to maintain an axial distance between the input member 50 and the hood 52 and, more particularly, between the first and second plates 82, 83.

[0424] Here, the spacer 84 of the input member 50 is arranged diametrically opposite to the drive tooth 68 of the input member 50, with respect to the axis of rotation X, as illustrated in figures 10 and 12.

[0425] Advantageously, the drive tooth 68 and the spacer 84 are formed by two beams, in particular of similar shapes.

[0426] Furthermore, in this embodiment example, the drive tooth 68 of the input member 50 forms another spacer.

[0427] Thus, the drive tooth 68 of the input member 50 also makes it possible to maintain the axial spacing between the input member 50 and the hood 52 and, more particularly, between the first and second plates 82, 83.

[0428] In an alternative, not shown, the hood 52 and, more particularly, the second plate 83 includes the spacer 84. The spacer 84 then also extends between the input member 50 and the hood 52, particularly in the assembled configuration of the spring brake 25. In this case, the spacer 84 of the hood 52 can be arranged diametrically opposite to the drive tooth 68 of the input member 50, with respect to the axis of rotation X, particularly in the assembled configuration of the spring brake 25.

[0429] Here, the drive tooth 68 and the spacer 84 make it possible to make the spring brake 25, in particular the input member 50, symmetrically with respect to the axis of rotation X, so as to guarantee a balancing of the spring brake 25, during a rotational movement of the input member 50 with respect to the output member 51 around the axis of rotation X.

[0430] Here and as illustrated in figures 10 and 11, the first and second plates 82, 83 each comprise a peripheral collar 82a, 83a. The two peripheral collars 82a, 83a are arranged opposite each other along the axis of rotation X, in particular in the assembled configuration of the spring brake 25.

[0431] Advantageously, the input member 50 is centered, in other words is configured to be centered, relative to the housing 56 of the drum 49, along the direction of the axis of rotation X, by means of the peripheral collar 82a of the first plate 82 and the friction surface 57 of the drum 49, in particular in the assembled configuration of the spring brake 25.

[0432] Advantageously, the hood 52 is centered, in other words is configured to be centered, relative to the housing 56 of the drum 49, along the direction of the axis of rotation X, by means of the peripheral collar 83a of the second plate 83 and the friction surface 57 of the drum 49, in particular in the assembled configuration of the spring brake 25.

[0433] Advantageously, particularly in the assembled configuration of the spring brake 25, the first leg 48a of the helical spring 48 is disposed between the first face 68a of the drive tooth 68 of the input member 50 and the spacer 84. In addition, the second leg 48b of the helical spring 48 is disposed between the second face 68b of the drive tooth 68 of the input member 50 and the spacer 84.

[0434] Advantageously, the input member 50 and the hood 52 and, more particularly, the first and second plates 82, 83 are held fixed in rotation around the axis of rotation X, in particular in the assembled configuration of the spring brake 25.

[0435] Here, the inlet element 50 and the cover 52 are fixed to each other by means of fixing elements 85, in this case by elastic snap-fit.

[0436] Advantageously, the inlet member 50 includes a first part of the fastening elements 85 and the cover 52 includes a second part of the fastening elements 85.

[0437] Here, the drive tooth 68 of the input member 50 includes a first fixing element 85, not shown. Furthermore, the spacer 84 of the input member 50 includes a second fixing element 85.

[0438] Advantageously, the drive tooth 68 comprises a first inner face 68c and a first outer face 68d. The first outer face 68d is opposite the first inner face 68c. The first inner face 68c is oriented towards the axis of rotation X. The spacer 84 comprises a second inner face 84c and a second outer face 84d. The second outer face 84d is opposite the second inner face 84c. The second inner face 84c is oriented towards the axis of rotation X. Furthermore, the first fixing element 85 is provided on the first inner face 68c of the drive tooth 68, and the second fixing element 85 is provided on the second inner face 84c of the spacer 84.

[0439] Advantageously, the hood 52 further comprises at least one first leg 106 and a second leg 106. Each of the first and second legs 106 is configured to extend, in other words, extends, in particular in a direction parallel to the axis of rotation X, between the hood 52 and the input member 50, especially in the assembled configuration of the spring brake 25. In addition, the first leg 106 cooperates, in other words, is configured to cooperate, with the drive tooth 68 and the second leg 106 cooperates, in other words, is configured to cooperate, with the spacer 84, especially in the assembled configuration of the spring brake 25.

[0440] Advantageously, each of the first and second tabs 106 is elastic. By "elastic," we mean that each of the first and second tabs 106 can deform elastically during the assembly and / or disassembly of the spring brake 25.

[0441] Thus, each of the first and second legs 106 is configured to deform elastically and to hook with respectively the drive tooth 68 or the spacer 84 by means of the fastening elements 85.

[0442] Advantageously, the first tab 106 of the hood 52 includes a third fixing element 85. The second tab 106 of the hood 52 includes a fourth fixing element 85. The first fixing element 85 of the drive tooth 68 cooperates, that is to say, is configured to cooperate, with the third fixing element 85 of the first tab 106 of the hood 52 and the second fixing element 85 of the spacer 84 cooperates, that is to say, is configured to cooperate, with the fourth fixing element 85 of the second tab 106 of the hood 52, in particular in the assembled configuration of the spring brake 25.

[0443] Advantageously, the first lug 106 is positioned, or rather configured to be positioned, opposite the first inner face 68c of the drive tooth 68, and the second lug 106 is positioned, or rather configured to be positioned, opposite the second inner face 84c of the spacer 84, particularly in the assembled configuration of the spring brake 25. Thus, the elastic snap-fit ​​assembly of the input member 50 with the cover 52, via the fasteners 85 provided on the drive tooth 68, the spacer 84, and the first and second lugs 106, simplifies the construction of the spring brake 25, minimizes the development time of this fastener during the design of the spring brake 25, and minimizes assembly time during the manufacture of this spring brake 25, while minimizing the costs of obtaining it.

[0444] In this way, the elastic snap-fitting from the inside of the first and second legs 106 with respectively the drive tooth 68 and the spacer 84, via the fixing elements 85, makes it possible to improve the robustness of the fixing of the input member 50 with the cover 52.

[0445] In addition, this elastic snap-fit ​​assembly of the inlet member 50 with the cover 52 ensures that the first and second tabs 106 are deformed elastically and not plastically, which would prevent a return to their initial position when the cover 52 is removed from the inlet member 50.

[0446] Furthermore, when a subassembly of the spring brake 25, which is formed of the input member 50, the output member 51, the helical spring 48 and the hood 52, is driven in rotation, around the axis of rotation X, inside the housing 56 of the drum 49, the first and second lugs 106 are moved respectively radially towards the drive tooth 68 and the spacer 84 by a centrifugal force, so as to be pressed respectively against the drive tooth 68 and the spacer 84.

[0447] Therefore, this elastic snap-fit ​​assembly of the drive tooth 68 and the spacer 84 of the input member 50 with the first and second lugs 106 of the hood 52 cannot disengage during the operation of the spring brake 25.

[0448] Here, the first leg 106 is in support, in other words is configured to be in support, against the first inner face 68c of the drive tooth 68 and the second leg 106 is in support, in other words is configured to be in support, against the second inner face 84c of the spacer 84, particularly in the assembled configuration of the spring brake 25.

[0449] Here, the first leg 106 is disposed, or is configured to be disposed, between the axis of rotation X and the drive tooth 68, in particular in a direction orthogonal to the axis of rotation X, and the second leg 106 is disposed, or is configured to be disposed, between the axis of rotation X and the spacer 84, in particular in a direction orthogonal to the axis of rotation X, in particular in the assembled configuration of the spring brake 25. Advantageously, each of the first and second fastening elements 85 is a harpoon and each of the third and fourth fastening elements 85 is a light, or vice versa.

[0450] Advantageously, each light forming the third and fourth fixing elements 85 is through-hole, that is to say, it passes completely through the tab 106 in which it is formed.

[0451] Here and as illustrated in figure 10, each light forming the third and fourth fixing elements 85 is rectangular in section.

[0452] Advantageously, the inlet member 50 and the outlet member 51 are made of plastic. In addition, the cover 52 is also made of plastic.

[0453] By way of non-limiting example, the plastic material of the inlet member 50, the outlet member 51 and the hood 52 is polybutylene terephthalate, also called PBT, or polyacetal, also called POM.

[0454] Thus, the use of a plastic material for the inlet member 50, the outlet member 51 and the cover 52 makes it possible to reduce the operating noise of the spring brake 25, in particular generated by friction against the drum 49.

[0455] Alternatively, the output unit 51 can be made of zamac (acronym for the names of the metals that compose it: zinc, aluminum, magnesium and copper).

[0456] Here, drum 49 is made of a plastic material, which can be, for example, polyacetal, also called POM, polyamide, also called PA, or polypropylene, also called PP.

[0457] Alternatively, drum 49 is made of steel, in particular sintered steel.

[0458] Advantageously, the input member 50 includes a shoulder 90. In addition, the drum 49 is supported, that is to say, is configured to be supported, against the shoulder 90 of the input member 50, particularly in the assembled configuration of the spring brake 25.

[0459] Here, the shoulder 90 is a circular bearing surface defined in the vicinity of one end of the first plate 82 of the input member 50 which is oriented towards the drum 49, in particular in the assembled configuration of the spring brake 25.

[0460] We note 090 an external diameter of the shoulder 90.

[0461] Advantageously, the shoulder 90 is provided at the junction between an external radial surface of the peripheral collar 82a and a face of the first plate 82 turned towards the output member 51.

[0462] Thus, the shoulder 90 allows the input member 50 to be radially centered relative to the drum 49, along a direction orthogonal to the axis of rotation X, and provides an axial stop for the input member 50 relative to the drum 49, along the direction of the axis of rotation X.

[0463] In this way, the bearing area of ​​the input member 50 against the drum 49 along the direction of the axis of rotation X is limited to the external diameter 090, in other words to a radial width, of the shoulder 90.

[0464] Therefore, the axial stop of the input member 50 relative to the drum 49 achieved by the shoulder 90 of the input member 50 makes it possible to eliminate the axial forces exerted on the input member 50 and the output member 51.

[0465] Advantageously, an external diameter value 090 of the shoulder 90 is strictly greater than a diameter value 057 of the friction surface 57 of the drum 49.

[0466] Thus, the housing 56 of the drum 49 opens at the end of the drum 49 intended to receive the shoulder 90 of the input member 50 and, preferably, at both ends of the housing 56 of the drum 49, that is to say that the housing 56 of the drum 49 is not partially closed by a rim extending towards the axis of rotation X.

[0467] In this way, the manufacture of drum 49 is simpler to implement, especially when drum 49 is made of a plastic material, while minimizing the cost of obtaining drum 49.

[0468] A method for assembling the spring brake 25 is implemented, firstly, by positioning the helical spring 48 inside the housing 56 of the drum 49. This step is carried out by applying pressure to the first and second tabs 48a, 48b of the helical spring 48, so as to compress the coils of the helical spring 48 and, consequently, to prevent them from rubbing against the friction surface 57 of the drum 49 and thus removing the lubricant previously deposited on it. Once the helical spring 48 is positioned in the housing 56 of the drum 49, the pressure exerted on the first and second tabs 48a, 48b is released. In a subsequent step, the output member 51 is assembled onto the input member 50 to form a subassembly. Then, this sub-assembly is inserted into the drum 49 until the shoulder 90 of the input member 50 is pressed against an end surface 107 of the drum 49.Finally, the hood 52 is inserted into the housing 56 of the drum 49 until the third and fourth fixing elements 85 of the hood 52 cooperate with the first and second fixing elements 85 of the input member 50.

[0469] This assembly method for the spring brake 25 ensures lubrication of the helical spring 48 housed inside the housing 56 of the drum 49. Advantageously, the output member 51 includes a barrel 108. The barrel 108 has a frustoconical external shape. In particular, in the assembled configuration of the spring brake 25, the barrel 108 has a smaller diameter cross-section opposite the first, second, third, and fourth mounting elements 85 compared to another cross-section near the cover 52, especially its second plate 83, along the direction of the axis of rotation X.

[0470] Thus, the shape of the barrel 108 allows a radial movement of the first and second tabs 106 of the hood 52, when the hood 52 is inserted into the housing 56 of the drum 49.

[0471] Thanks to the present invention, this construction of the electromechanical actuator, where the centering shaft is guided by the first bearing mounted in the first bore of the planet carrier of the first reduction stage and where the centering shaft is mounted without any contact with the spring brake, in particular with the input member and the output member at the level of their respective bore, makes it possible to improve the guidance of each of the reduction stages of the reducer, so as to minimize the vibrations during the electrical activation of the electromechanical actuator and, consequently, the operating noise of the latter.

[0472] Numerous modifications can be made to the embodiment examples described above, without departing from the scope of the invention as defined by the claims.

[0473] Alternatively, and not shown, the fastening elements 85 of the input member 50 and the cover 52 are screw-fastened. In this case, each of the first and second fastening elements 85 is inserted through a notch in the cover 52, specifically the second plate 83, and then screwed into a screw shank of the input member 50. Furthermore, a first screw shank is provided in the drive tooth 68 of the input member 50 and a second screw shank is provided in the spacer 84 of the input member 50.

[0474] In another variant, not shown, the fixing elements 85 of the input member 50 and of the hood 52 are snap-fit ​​fixing elements and, in particular, studs arranged at the level of the drive tooth 68 and the spacer 84 and holes made in the hood 52, in this case in the second plate 83.

[0475] In another variant, not shown, the inlet member 50 and the cover 52 can be held together by means of crimped fastening elements. Thus, the fastening elements can be, in particular, shafts crimped into housings.

[0476] In another variant, not shown, the fastening elements 85 of the inlet member 50 and the cover 52 may be a combination of the different fastening elements described above. The number of fastening elements for the inlet member and the cover is not limited and may vary, in particular exceeding three.

[0477] Furthermore, the envisaged embodiments and variants can be combined to generate new embodiments of the invention, without departing from the scope of the invention as defined by the claims.

Claims

55 DEMANDS 1. Electromechanical actuator (11) for a blackout device (3), the electromechanical actuator (11) comprising at least: - a crankcase (17), - an electric motor (16), - a reducer (19), the reducer (19) comprising a first reduction stage (37) and at least one other reduction stage (39), - a spring brake (25), the spring brake (25) being disposed between the first reduction stage (37) and the other reduction stage (39), and - a centering shaft (71), the electric motor (16), the reducer (19) and the spring brake (25) being mounted inside the housing (17), each of the first and subsequent reduction stages (37, 39) comprising at least: - a planet carrier (66), the planet carrier (66) comprising at least one first bore (74), the centering shaft (71) being mounted inside the first bore (74) of the planet carrier (66) of the other reduction stage (39), - a solar gable (40), and - a plurality of satellite gears (63), the spring brake (25) comprising at least: - a helical spring (48), - a drum (49), the drum (49) comprising a friction surface (57), the friction surface (57) being configured to cooperate with at least one turn of the helical spring (48), - an input member (50), the input member (50) comprising at least one bore (72), and - an output member (51), the output member (51) comprising at least one bore (73), characterized in that the centering shaft (71) is housed inside the bore (72) of the input member (50) with a first operating clearance (J1) and inside the bore (73) of the output member (51) with a second operating clearance (J2), in that the first reduction stage (37) further comprises a first bearing (76), the first bearing (76) comprising at least one first bore (77), 56 in that the first bearing (76) is mounted inside the first bore (74) of the planet carrier (66) of the first reduction stage (37) with a tight fit, and in that the centering shaft (71) is mounted inside the first bore (77) of the first bearing (76) with a loose fit.

2. Electromechanical actuator (11) for a blackout device (3) according to claim 1, characterized in that the first bearing (76) further comprises a second bore (78), in that the solar pinion (40) of the first reduction stage (37) comprises a shaft (59), and in that the shaft (59) of the solar pinion (40) of the first reduction stage (37) is mounted inside the second bore (78) of the first bearing (76) with a free fit.

3. Electromechanical actuator (11) for a blackout device (3) according to claim 1 or according to claim 2, characterized in that the centering shaft (71) is mounted inside the first bore (74) of the planet carrier (66) of the other reduction stage (39) with a tight fit.

4. Electromechanical actuator (11) for a blackout device (3) according to any one of claims 1 to 3, characterized in that the planet carrier (66) of the first reduction stage (37) further comprises: - a second bearing (98), the second bearing (98) comprising a bore (99), and - a second bore (100), in that the second bearing (98) is mounted inside the second bore (100) of the planet carrier (66) of the first reduction stage (37) with a tight fit, in that the solar pinion (40) of the first reduction stage (37) includes a shaft (59), and in that the shaft (59) of the solar pinion (40) of the first reduction stage (37) is mounted inside the bore (99) of the second bearing (98) with a loose fit. 57 5. Electromechanical actuator (11) for a blackout device (3) according to any one of claims 1 to 4, characterized in that the planet carrier (66) of the first reduction stage (37) comprises a first part (66a) and a second part (66b), in that the first part (66a) is assembled with the second part (66b), and in that the first bore (74) of the planet carrier (66) of the first reduction stage (37) is provided in the second part (66b).

6. Electromechanical actuator (11) for a blackout device (3) according to claim 5, characterized in that the planet carrier (66) of the first reduction stage (37) comprises a plurality of beams (92), in that the assembly of the first part (66a) with the second part (66b) of the planet carrier (66) is carried out via the beams (92), in that the planet carrier (66) of the first reduction stage (37) further comprises shafts (95), and in that a planetary pinion (63) is mounted freely for rotation on each of the shafts (95) of the planet carrier (66) of the first reduction stage (37).

7. Electromechanical actuator (11) for a blackout device (3) according to any one of claims 1 to 6, characterized in that the planet carrier (66) of the other reduction stage (39) is made by means of a plate (102) and shafts (103), the shafts (103) being fixed to the plate (102), and in that a planet gear (63) is mounted freely in rotation on each of the shafts (103) of the planet carrier (66) of the other reduction stage (39).

8. Electromechanical actuator (11) for a blackout device (3) according to any one of claims 1 to 7, characterized in that the solar pinion (40) of the other reduction stage (39) comprises a bore (75), and in that the centering shaft (71) is mounted inside the bore (75) of the solar pinion (40) of the other reduction stage (39) with a free fit. 58 9. Electromechanical actuator (11) for a blocking device (3) according to any one of claims 1 to 8, characterized in that the centering shaft (71) is made of a metallic material.

10. Blocking device (3), the blocking device (3) comprising at least: - a screen (2), and - an electromechanical actuator (11), the screen (2) being driven in movement by the electromechanical actuator (11), characterized in that the electromechanical actuator (11) conforms to any one of claims 1 to 9.

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