LINEAR SHAREHOLDER AND ASSOCIATED OCCULTING DEVICE

Abstract

A linear actuator (4) for operating a screen, particularly a screen closing an opening in a building or enclosure, the linear actuator (4) being intended to be connected on one side to the screen and on the other to the building or enclosure, comprises at least: an electric motor, a motion transmission system, and a housing (7) comprising a first part (21) within which the electric motor is disposed, and a second part (22) within which the motion transmission system is disposed, the housing (7) having an exposed side. The linear actuator (4) further comprises a cover element (46) covering, on the exposed side of the housing (7), the second part (22) of the housing (7) and at least partially the first part (21) of the housing (7).

Description

TECHNICAL FIELD OF THE INVENTION

[0001] The present invention relates to a linear actuator for operating a screen that closes an opening in a building, enclosure, or fence, and in particular a hinged screen such as a shutter, door, gate, grille, or any other equivalent equipment. It also relates to a screening device comprising such an actuator and an associated screen. PREVIOUS STATE OF THE ART

[0002] We are already familiar with document FR 2 448 022, which describes a linear actuator comprising an electric motor, a gearbox, a motion transmission system, and a housing. The housing comprises a first part containing the electric motor, and a second part containing the motion transmission system. The motion transmission system includes a moving element connected to the screen, specifically a yoke. The motion transmission system includes a threaded rod and a nut; the threaded rod is driven in rotation by the electric motor and the gearbox, and the nut is moved in translation along the threaded rod. The moving element is connected to the nut. The second part of the housing forms a tubular body with a longitudinal recess in its lower plane.And the displacement element is moved through the longitudinal recess, when the electric motor is activated, driving the threaded rod in rotation and then the nut in translation.

[0003] Furthermore, such a linear actuator comprises a first profiled element forming the first part of the housing and a second profiled element forming the second part of the housing. The first and second profiled elements, constituting the first and second parts of the housing respectively, are fixed together.

[0004] However, this linear actuator has the drawback of constructing the first and second parts of the housing from two separate profiled elements with no corresponding shape. This can result in a certain fragility of the linear actuator at the junction between the first and second profiled elements, which respectively constitute the first and second parts of the housing. Furthermore, such a linear actuator is presented as a casing composed of interconnected blocks with varying cross-sections. This complicates the storage of the linear actuator before its installation in the building. It is also observed that, once the actuator is installed, the junction between the two parts of the housing becomes a prime area for water infiltration and / or dust accumulation, which proves difficult to clean.Finally, such an assembly is perceived as neither robust nor aesthetic since the casing is constructed from blocks placed one behind the other and fixed together.

[0005] Document EP 1 503 019 describes a linear actuator intended to operate a screen closing an opening made in a building or enclosure, the linear actuator being intended to be connected on one side to the screen and on the other side to the building or enclosure, the linear actuator comprising an electric motor, a motion transmission system, and a housing comprising a lower part and an upper part each formed by an elongated piece substantially profiled in a U shape, the two parts together forming a housing inside which the electric motor and the motion transmission system are disposed, the lower and upper parts of the housing being assembled together so as to form a connection, which is not protected and is visible.

[0006] Document WO 2009 / 007086 A1 describes a linear actuator for operating a sliding door. The linear actuator comprises an electric motor, a gearbox, a motion transmission system, and a housing. The motion transmission system includes a threaded rod and a nut. The threaded rod is rotated by the electric motor. The nut moves linearly along the threaded rod. The housing comprises a first part, inside which the output shaft of the electric motor is located, and a second part, inside which the body of the electric motor and the gearbox are located. The first and second parts of the housing are joined together to form a connection. The first part of the housing is inserted inside the mounting profile, and the second part of the linear actuator housing has an external contour that corresponds to the external contour of the mounting profile.Thus, the second part of the casing is considered as a continuation of the assembly profile. DESCRIPTION OF THE INVENTION

[0007] The present invention aims to resolve, at low cost, all or part of the aforementioned drawbacks. To this end, the present invention relates, in a first aspect, to a linear actuator for operating a screen that closes an opening in a building or enclosure. The linear actuator is intended to be connected on one side to the screen and on the other side to the building or enclosure. The linear actuator comprises at least: an electric motor, a gearbox, a motion transmission system, the motion transmission system comprising a threaded rod and a nut, the threaded rod being driven in rotation by the electric motor and the gearbox, and the nut being moved in translation on the threaded rod, a housing comprising a first part inside which the electric motor is disposed, and a second part inside which the motion transmission system is disposed, the first and second parts of the housing being assembled together so as to form a connection, the housing having an exposed side corresponding to an external side of the linear actuator, the external side of the housing being the upper side of the housing in the assembled position of the linear actuator relative to the concealment device, and an element common to the first part of the housing and the second part of the housing,the common element being a cover element covering the upper side of the second part of the housing and at least partially the upper side of the first part of the housing, so as to conceal the connection between the first and second parts of the housing, on the upper side of the housing.

[0008] Thus, such a linear actuator formed by means of the first and second parts of the housing includes a common element consisting of the cover element covering on one side the exposed side of the second part of the housing and on the other side at least in part the exposed side of the first part of the housing.

[0009] The covering element, at least partially covering the exposed side of the first housing section and the exposed side of the second housing section, ensures a continuous shape that facilitates storage, limits dust accumulation, simplifies cleaning, eliminates sharp edges, and improves the perceived quality of the linear actuator. In particular, it conveys a sense of robustness through a monolithic appearance achieved by using the cover element as a common part between the first and second housing sections. To this end, the cover element preferably has a uniform exposed outer face, meaning a constant cross-section in a longitudinal direction. Preferably, the cover element has a uniform cross-section and is formed by a profile.

[0010] In addition, the distribution of the forces of the connection between the first and second parts of the linear actuator housing can be improved through the cover element covering on one side the exposed side of the second part of the housing and on the other side at least partially the exposed side of the first part of the housing.

[0011] According to a preferred feature of a first embodiment of the invention, the second part of the housing comprises two side walls and a transverse wall extending between the two side walls, where the cover element constitutes the transverse wall of the second part of the housing. Thus, such a linear actuator formed by means of the first and second parts of the housing includes a common element consisting of the transverse wall of the second part of the housing. The number of parts is thereby minimized and the assembly of the housing is facilitated.

[0012] Preferably, the transverse and lateral walls of the second part of the housing are joined together by guiding means, preferably sliding joints that eliminate five degrees of freedom and allow only translation in one guiding direction. Thus, the second part of the housing consists of three separate walls connected by guiding means to form a single unit. In this way, the second part of the housing is modular and allows the transverse and lateral walls, which can be of different dimensions depending on the actuator models, to be assembled via the guiding means. Furthermore, the assembly of the second part of the housing is achieved by sliding the transverse and lateral walls along the guiding means in the guiding direction.If the motion transmission system includes a shaft rotating around an axis, such as a worm gear, it is advantageous for the guidance direction to be parallel to the shaft axis. More generally, the guidance direction should preferably be parallel to the longest dimension of the housing.

[0013] Furthermore, the sliding of the transverse wall relative to the side walls of the second part of the housing, via the guide means, allows access from above to the space defined by the second part of the housing, particularly during installation or maintenance of the linear actuator, thus facilitating operation by the technician. In this way, the sliding of the transverse wall relative to the side walls of the second part of the housing, via the guide means, provides access to the motion transmission system, and potentially to at least one sensor and / or at least one mechanical stop located inside the second part of the housing.

[0014] Advantageously, the means for guiding the transverse and lateral walls of the second part of the housing include connecting elements forming ribs and grooves with conjugate profiles, preferably dovetail-shaped. This type of connection contributes to the rigidity of the housing.

[0015] According to a preferred feature of a second embodiment of the invention, the cover element is formed by a wall distinct from the first and second parts of the housing. Thus, such a linear actuator formed by means of the first and second parts of the housing further comprises a common element consisting of a distinct wall forming the cover element.

[0016] Advantageously, a transverse face of the second part of the housing includes a longitudinal recess. Thus, following the removal of the cover element, the longitudinal recess of the transverse face of the second part of the housing allows access from above to the space defined by the second part of the housing, particularly during an installation or maintenance operation of the linear actuator, thereby facilitating handling by the technician.

[0017] Preferably, the cover element and the second part of the housing are joined together by guiding means, so as to form a single unit. The guiding means preferably constitute sliding joints that eliminate five degrees of freedom and allow only translation in one guiding direction. The assembly of the cover element and the second part of the housing can thus be achieved by sliding between the cover element and the second part of the housing along the guiding means.Furthermore, the sliding of the cover element relative to the second part of the housing via the guide means allows access from above to the space defined between the cover element and the second part of the housing, and potentially to the space defined by the second part of the housing via the longitudinal recess in the transverse face of the second part of the housing. This is particularly useful during the installation or maintenance of the linear actuator, thus facilitating the operator's work. In this way, the sliding of the cover element relative to the second part of the housing via the guide means allows access to the motion transmission system through the longitudinal recess in the transverse face of the second part of the housing.

[0018] In addition, the sliding of the cover element relative to the second part of the housing through the guide means allows access to at least one sensor and / or at least one mechanical stop disposed between the cover element and the second part of the housing, and possibly inside the second part of the housing through the longitudinal recess provided in the transverse face of the second part of the housing.

[0019] Advantageously, the guiding means for the cover element and the second part of the housing include connecting elements forming ribs and grooves with conjugate profiles, preferably dovetailed. This type of connection contributes to the rigidity of the housing.

[0020] According to another preferred feature of the invention, the cover element includes guiding means cooperating with guiding means of the first part of the housing. Thus, the perception of robustness through a one-piece appearance between the first and second parts of the linear actuator housing is also ensured by the guiding means of the cover element cooperating with the guiding means of the first part of the housing.

[0021] Advantageously, the guiding means for the cover element and the first part of the housing are sliding connection elements.

[0022] According to another preferred feature of the invention, the second part of the housing is connected to the first part of the housing by means of a joining element, the cover element cooperating with guiding means for the joining element.

[0023] Advantageously, one end of the second part of the housing, opposite the first part of the housing, is sealed by a plug.

[0024] Preferably, the plug sealing the end of the second part of the housing supports a bearing cooperating with the motion transmission system.

[0025] Advantageously, one end of the first part of the housing, opposite the second part of the housing, is closed by an end cap.

[0026] According to a second aspect, the invention relates to an occultation device comprising at least one screen that can be moved around an axis of rotation and driven in rotation by a linear actuator according to the invention.

[0027] This occulting device has characteristics and advantages similar to those described previously in relation to the linear actuator according to the invention. BRIEF DESCRIPTION OF THE FIGURES

[0028] Other features and advantages of the invention will become apparent in the following description, with reference to the attached drawings, given by way of non-limiting examples: there figure 1 is a schematic top view of a blackout device according to one embodiment of the invention; the figure 2 is a perspective view of a linear actuator according to a first embodiment of the invention for a blackout device as illustrated in the figure 1 ; there figure 3 is a front view of the linear actuator shown in the figure 2 ; there figure 4 is a cross-sectional view of the figure 3 according to an unshown longitudinal cross-sectional plane passing through a rotation axis of a linear actuator motion transmission system; the figure 5 is a cross-sectional view of the figure 4 according to the VV cutting plan; the figure 6 is a cross-sectional view of the figure 4 according to the section plan VI-VI; the figure 7 is an exploded view of the linear actuator shown in the figure 2 ; there figure 8 is a detail view VIII of the figure 4 ; there figure 9 is a detailed view IX of the figure 4 ; there Figure 10 is an exploded view of a linear actuator according to a second embodiment of the invention for a blackout device as illustrated in the figure 1 ; there figure 11 is a front view of the linear actuator shown in the Figure 10 ; and the figure 12 is a cross-sectional view of the figure 11 according to the cutting plan XII-XII. DETAILED DESCRIPTION OF IMPLEMENTATION METHODS

[0029] We will first describe, with reference to the figure 1, a screening device according to the invention. The screening device 1 is installed at an opening 2 made in a building or enclosure. The screening device 1 comprises at least one hinged screen 3 oscillating about an axis of rotation 25 that is theoretically substantially vertical and perpendicular to the plane of the figure 1 The shading device 1 includes a motorized drive device that moves the screen 3 between at least a first and a second position. The motorized drive device includes an electromechanical linear actuator 4 for the screen 3.

[0030] In this embodiment, the screen 3 is a movable closing or blocking element such as a shutter, door, gate, grille, or any other equivalent device; however, the present invention is applicable to all types of blocking devices having at least one hinged screen. The screen 3 allows the opening 2 made in a building or enclosure, such as a dwelling or fence, to be closed off.

[0031] The linear actuator 4 comprises a first part connected to the screen 3 and a second part connected to the building or enclosure. The rear end of the linear actuator 4 is articulated on a fixed support 26 of the building or enclosure so as to oscillate about a transverse axis substantially parallel to and close to the axis of rotation 25 of the screen 3. The screen 3 of the shading device 1 is driven by the linear actuator 4 and moves between an open and a closed position.

[0032] The linear actuator 4 is controlled by a control unit. The control unit can be, for example, a local control unit 40, which can be connected via a wired or wireless link to a central control unit 41. The central control unit 41 controls the local control unit 40, and, where applicable, other similar local control units distributed throughout the building. The central control unit 41 can communicate with a remote weather station located outside the building, including one or more sensors that can be configured to determine, for example, temperature, brightness, or wind speed. A remote control 42, which can be a type of local control unit, and equipped with a keypad that includes selection and display means, further allows a user to operate the linear actuator 4 and / or the central control unit 41.

[0033] The linear actuator 4 is preferably configured to execute commands to open or close the screen 3 of the shading device 1, which may be issued, in particular, by the remote control 42. Control means for the linear actuator 4 according to the invention, enabling the movement of the screen 3 of the shading device 1, consist of at least one electronic control unit 43. This electronic control unit 43 is capable of activating an electric motor 5 of the linear actuator 4, and in particular of supplying electrical power to the electric motor 5. Thus, the electronic control unit 43 notably controls the electric motor 5, so as to open or close the screen 3, as described above.The electronic control unit 43 also includes a command receiving module, in particular for radio commands issued by a command transmitter such as the remote control 42 intended to control the linear actuator 4. Of course, the command receiving module can also allow the reception of commands transmitted by wired means.

[0034] Here, and as illustrated in the figure 2 , the electronic control unit 43 is arranged inside a housing 7 of the linear actuator 4.

[0035] The control means for the linear actuator 4 include hardware and / or software. By way of non-limiting example, the hardware may include at least one microcontroller.

[0036] We will now describe, with reference to figures 2 to 12A linear actuator according to the invention. The linear actuator 4 comprises at least one electric motor 5, a motion transmission system 6, and a housing 7. The linear actuator 4 further comprises a gearbox 36. The gearbox 36 is mounted between the electric motor 5 and the motion transmission system 6. The electric motor 5 is configured to drive the motion transmission system 6 in reversible rotation, i.e., in a clockwise direction and in a counterclockwise direction.

[0037] Here, the motion transmission system 6 includes a displacement element 18 connected to the screen 3. The motion transmission system 6 includes a threaded rod 19 and a nut 20, the threaded rod 19 being driven in rotation by the electric motor 5 and the reducer 36, and the nut 20 being moved in translation along the threaded rod 19. The displacement element 18 is connected to the nut 20. The threaded rod 19 is mounted for rotation inside the housing 7 about an axis of rotation X. The threaded rod 19 is supported by at least one bearing 17, and in particular by two bearings 17, 35.

[0038] The housing 7 comprises a first part 21 forming a first housing inside which the electric motor 5 is disposed, and a second part 22 forming a second housing separate from the first housing and inside which the motion transmission system 6 is disposed. Here, the electric motor 5 is fixed in the first part 21 of the housing 7. The threaded rod 19 of the motion transmission system 6 is stationary along the axial direction in the housing 7, and in particular in the second part 22 thereof. Thus, the threaded rod 19 is protected inside the second part 22 of the housing 7. In this way, only the nut 20 is moved along the threaded rod 19 and inside the second part 22 of the housing 7. The nut 20 is moved on the threaded rod 19 according to the direction of rotation of the electric motor 5. The nut 20 is moved in translation on the threaded rod 19.

[0039] In one embodiment, the displacement element 18 is housed in a bore provided in a fixing lug 45 connected to the screen 3, this connection preventing the rotation of the nut 20 around the axis of the threaded rod 19. Here and in no way limiting, the fixing lug 45 is fixed to the screen 3 by means of fixing screws.

[0040] When the threaded rod 19 is driven in rotation in a first direction of rotation, for example clockwise, by the electric motor 5, the nut 20 is moved, for example from the free end of the second part 22 of the housing 7 to the first part 21 of the housing 7 so as to exert a pull on the screen 3, and consequently to open the screen 3. When the threaded rod 19 is driven in rotation in a second direction of rotation, i.e. in the opposite direction, for example counterclockwise, the nut 20 is moved from the first part 21 of the housing 7 to the free end of the second part 22 of the housing 7 so as to exert a push on the screen 3, and consequently to close the screen 3.

[0041] The housing 7 has an exposed side, which will be referred to hereafter as the upper side. The exposed side of the housing 7 corresponds to the external side of the linear actuator 4, or in other words, the side facing the elements and the sun. The external side of the housing 7 is its upper side in the assembled position of the linear actuator 4 relative to the shading device 1.

[0042] Advantageously, the first part 21 of the housing 7 is made of metallic material, preferably aluminum. Here, the first part 21 of the housing 7 is a profiled element. Here, and as illustrated in figures 7 And 10 The upper face 11 of the first part 21 of the housing 7 is a solid face. Thus, the first part 21 of the housing 7 is a single piece connecting four faces, upper, lateral and lower, so as to guarantee its rigidity.

[0043] In another embodiment not shown, the upper face 11 of the first part 21 of the housing 7 includes a recess.

[0044] Here, the second part 22 of the housing 7 lacks a lower wall. The lower plane of the second part 22 of the housing 7 includes the longitudinal recess 24.

[0045] In another embodiment not shown, the second part 22 of the housing 7 may also include a lower wall inside which is provided the longitudinal recess 24.

[0046] A cover element 46 covers an upper side of the second part 22 of the housing 7 and at least part of an upper side of the first part 21 of the housing 7, on the exposed side of the housing 7. Thus, such a linear actuator 4 formed by means of the first and second parts 21, 22 of the housing 7 comprises a common element consisting of the cover element 46 covering on the one hand the upper side of the second part 22 of the housing 7 and on the other hand at least part of the upper side of the first part 21 of the housing 7.In this way, the covering at least in part of the upper side of the first part 21 of the housing 7 and the upper side of the second part 22 of the housing 7 by the covering element 46 makes it possible to improve the perceived quality of the linear actuator 4, and in particular to convey a perception of robustness by a monobloc appearance obtained by the use of the covering element 46 as a common part between the first and second parts 21, 22 of the housing 7.

[0047] In addition, the distribution of the forces of the connection between the first and second parts 21, 22 of the housing 7 of the linear actuator 4 can be improved through the cover element 46 covering on the one hand the upper side of the second part 22 of the housing 7 and on the other hand at least in part the upper side of the first part 21 of the housing 7.

[0048] We will now describe, with reference to figures 2 to 9, a first embodiment of the invention.

[0049] The second part 22 of the housing 7 comprises an upper wall 8 and two side walls 9. Advantageously, the upper wall 8 and side walls 9 of the second part 22 of the housing 7 are made of metallic material, preferably aluminum. The second part 22 of the housing 7, consisting of the upper wall 8 and side walls 9, forms an inverted U in the assembled position of the linear actuator 4 relative to the shutter device 1. In this embodiment, the upper wall 8 of the second part 22 of the housing 7 forms a bottom wall.

[0050] The covering element 46 is formed by the upper wall 8 of the second part 22 of the housing 7. Here, the upper wall 8 of the second part 22 of the housing 7 at least partially covers an upper face 11 of the first part 21 of the housing 7. Thus, the linear actuator 4 formed by means of the first and second parts 21, 22 of the housing 7 includes an element common to these two parts 21, 22, constituted by the upper wall 8 of the second part 22 of the housing 7. In this way, the at least partial covering of the upper face 11 of the first part 21 of the housing 7 by the upper wall 8 of the second part 22 of the housing 7 improves the perceived quality of the linear actuator 4, and in particular conveys a perception of robustness through a monolithic appearance achieved by using the upper wall 8 of the second part 22 of the housing 7 as a common part between the first and second parts. parts 21, 22 of casing 7.The overlapping, at least in part, of the upper face 11 of the first part 21 of the housing 7 by the upper wall 8 of the second part 22 of the housing 7 also makes it possible to conceal the connection between the first and second parts 21, 22 of the housing 7. In addition, the distribution of forces of the connection between the first and second parts 21, 22 of the housing 7 of the linear actuator 4 can be improved through the upper wall 8 of the second part 22 of the housing 7 overlapping, at least in part, the upper face 11 of the first part 21 of the housing 7.

[0051] Here, and as illustrated in figures 2 to 4, the upper wall 8 of the second part 22 of the housing 7 completely covers the upper face 11 of the first part 21 of the housing 7. Thus, the complete covering of the upper face 11 of the first part 21 of the housing 7 by the upper wall 8 of the second part 22 of the housing 7 makes it possible to further improve the perceived quality of the linear actuator 4, and in particular to convey the perception of robustness by a monobloc appearance over the entire length of the housing 7 comprising the first and second parts 21, 22.

[0052] Advantageously, the side walls 9 of the second part 22 of the housing 7 are identical. Thus, the cost of producing the linear actuator 4 is minimized since the side walls 9 of the second part 22 of the housing 7 are identical and therefore reversible. Furthermore, the side walls 9 of the second part 22 of the housing 7 are manufactured using the same tooling, thereby minimizing investment costs.

[0053] Preferably, the upper 8 and lateral 9 walls of the second part 22 of the housing 7 are joined together by guiding means 10. Thus, the second part 22 of the housing 7 consists of three separate walls 8, 9 connected by guiding means 10 to form a single unit. In this way, the second part 22 of the housing 7 is modular and allows the upper 8 and lateral 9 walls, which may be of different dimensions depending on the actuator models 4, to be joined by means of the guiding means 10.

[0054] In one case, the upper wall 8 of the second part 22 of the housing 7 can be of greater or lesser length depending on the length of the first part 21 of the housing 7, while maintaining the side walls 9 of the second part 22 of the housing 7 with identical dimensions for several models of actuators 4.

[0055] In another case, the upper wall 8 of the second part 22 of the housing 7 can be of greater or lesser length depending on the length of the motion transmission system 6 for several actuator models 4, and consequently of the second part 22 of the housing 7. The length of the side walls 9 of the second part 22 of the housing 7 is adjusted according to the length of the upper wall 8 of the second part 22 of the housing 7. Of course, in such a case, the length of the first part 21 of the housing 7 can be the same or different depending on the actuator models 4.

[0056] Furthermore, the assembly of the second part 22 of the housing 7 is achieved by sliding the upper wall 8 and side walls 9 together along the guide means 10. Moreover, the sliding of the upper wall 8 relative to the side walls 9 of the second part 22 of the housing 7 through the guide means 10 allows access from above to the space defined by the second part 22 of the housing 7, in particular during an installation or maintenance operation of the linear actuator 4, so as to facilitate the handling by the operator, in particular without having to dismantle the side walls 9 of the second part 22 of the housing 7.In this way, the sliding of the upper wall 8 relative to the side walls 9 of the second part 22 of the housing 7 through the guide means 10 allows access to the motion transmission system 6, and possibly to at least one sensor (not shown) and / or to at least one mechanical stop (not shown) located inside the second part 22 of the housing 7.

[0057] Here, and as illustrated in figures 2 to 4 and 7 The upper 8 and lateral 9 walls of the second part 22 of the housing 7 form a hollow body comprising a longitudinal recess 24 in a lower plane of the second part 22 of the housing 7. The displacement element 18 is moved through the longitudinal recess 24 when the electric motor 12 is activated.

[0058] Advantageously, the guiding means 10 for the upper 8 and lateral 9 walls of the second part 22 of the housing 7 are connecting elements forming ribs 10a and grooves 10b of conjugate shapes, that is, elements projecting from one of the walls and sliding into corresponding recessed elements of another wall. Here, the lateral walls 9 of the second part 22 of the housing 7 have a rib 10a at their upper end, and the upper wall 8 of the second part 22 of the housing 7 has a groove 10b at each of its two ends, such that the grooves 10b of the second part 22 of the housing 7 slide into the rib 10a of each lateral wall 9 of the second part 22 of the housing 7.Thus, the assembly of the second part 22 of the housing 7 is achieved by sliding the upper 8 and lateral 9 walls against each other along the connecting elements forming ribs 10a and grooves 10b of conjugate shapes. In this way, the assembly of the second part 22 of the housing 7 is inexpensive, simple, and quick to implement during the manufacture of the linear actuator 4, and without the need for specific tooling.

[0059] In addition, such guiding means 10 make it possible to guarantee the aesthetics of the linear actuator 4 since they are invisible following the assembly of the second part 22 of the housing 7.

[0060] Here, and as illustrated in the figure 7The ribs 10a are formed by a projecting element of longitudinal shape, in particular straight or curved. The associated grooves 10b correspond to a recessed element of the same shape. In another embodiment, the ribs 10a are formed by a projecting element in the shape of a dovetail, i.e., trapezoidal. The associated grooves 10b correspond to a recessed element of the same shape. Thus, the dovetail shape of the ribs 10a and the grooves 10b prevents the upper 8 and lateral 9 walls of the second part 22 of the housing 7 from separating after they have been joined together by sliding.

[0061] Preferably, the cover element 46, being made by the upper wall 8 of the second part 22 of the housing 7, includes guide means 27 cooperating with guide means 12 of the first part 21 of the housing 7.

[0062] Thus, the perception of robustness by a monobloc aspect between the first and second parts 21, 22 of the housing 7 of the linear actuator 4 is also guaranteed by the guiding means 27 of the upper wall 8 of the second part 22 of the housing 7 cooperating with the guiding means 12 of the first part 21 of the housing 7.

[0063] Advantageously, the guiding means 12, 27 of the upper wall 8 of the second part 22 of the housing 7 and of the first part 21 of the housing 7 are sliding connecting elements. Thus, the assembly of the upper wall 8 of the second part 22 of the housing 7 with the first part 21 of the housing 7 is achieved by sliding the upper wall 8 of the second part 22 of the housing 7 relative to the first part 21 of the housing 7, and in particular relative to guide flanges 12 of the upper face 11 of the first part 21 of the housing 7.

[0064] In this way, assembling the upper wall 8 of the second part 22 of the housing 7 with the first part 21 of the housing 7 is inexpensive, simple, and quick to implement during the manufacture of the linear actuator 4, and without the need for specific tooling. Furthermore, such guiding means 12, 27 ensure the aesthetic appearance of the linear actuator 4 since they are invisible after the assembly of the upper wall 8 of the second part 22 of the housing 7 with the first part 21 of the housing 7.

[0065] The guide elements 12, 27 connecting the upper wall 8 of the second part 22 of the housing 7 to the first part 21 of the housing 7, and in particular the guide flanks 27 of the upper wall 8 of the second part 22 of the housing 7 and the guide flanks 12 of the upper face 11 of the first part 21 of the housing 7, constitute sliding zones, that is to say, sliding planes relative to each other.

[0066] In this first embodiment of the invention, where the upper face 11 of the first part 21 of the housing 7 includes a recess, the edges forming the recess of the upper face 11 of the first part 21 of the housing 7 may include the guiding means 12 of the first part 21 of the housing 7 cooperating with the guiding means 10 of the upper wall 8 of the second part 2 of the housing 7 constituting the cover element 46. In such a case, the guiding means 12 of the first part 21 of the housing 7 may be ribs, in particular identical to those of the side walls 9 of the second part 22 of the housing 7.

[0067] Here, the guiding means 10 of the upper wall 8 of the second part 22 of the housing 7, in particular the groove 10b at each of its two ends, cooperate on the one hand with the guiding means 10 of the side walls 9 of the second part 22 of the housing 7, in particular the rib 10a at their upper end, and on the other hand with the guiding flanks 12 of the first part 21 of the housing 7 so as to constitute the guiding means 27. Thus, the guiding means 10 of the upper wall 8 of the second part 22 of the housing 7, in particular the groove 10b at each of its two ends, are identical so as to cooperate with the guiding means 10 of the side walls 9 of the second part 22 of the housing 7 and the guiding means 12 of the first part 21 of the housing 7.

[0068] Preferably, the second part 22 of the housing 7 is connected to the first part 21 of the housing 7 by means of a connecting element 14. The cover element 46 formed by the upper wall 8 of the second part 22 of the housing 7 cooperates with guiding means 15 of the connecting element 14.

[0069] Thus, the upper wall 8 of the second part 22 of the housing 7 is positioned relative to the first and second parts 21, 22 of the housing 7 through guide means 15 of the connecting element 14 participating in the connection between the second part 22 of the housing 7 and the first part 21 of the housing 7.

[0070] In this first embodiment illustrated in figures 2 to 9, the assembly of the upper wall 8 of the second part 22 of the housing 7 with the first part 21 of the housing 7 is achieved by sliding the upper wall 8 of the second part 22 of the housing 7 relative to the joining element 14 and then to the first part 21 of the housing 7, and in particular relative to guide flanks 15 of the upper face 13 of the joining element 14 and to guide flanks 12 of the upper face 11 of the first part 21 of the housing 7.

[0071] In this way, the assembly of the upper wall 8 of the second part 22 of the housing 7 with the connecting element 14 and with the first part 21 of the housing 7 is inexpensive, simple, and quick to implement during the manufacture of the linear actuator 4, and without the need for any special tooling. The sliding joint provides rigidity to the connection between the first part 21 of the housing 7 and the second part 22 of the housing 7. Furthermore, the guiding means 12, 15, and 27 ensure the aesthetic appearance of the linear actuator 4, as they are invisible after the assembly of the upper wall 8 of the second part 22 of the housing 7 with the connecting element 14 and the first part 21 of the housing 7.

[0072] The guide elements 12, 15, 27 connecting the upper wall 8 of the second part 22 of the housing 7 to the joining element 14 and to the first part 21 of the housing 7, and in particular the guide flanks 27 of the upper wall 8 of the second part 22 of the housing 7, the guide flanks 15 of the upper face 13 of the joining element 14 and the guide flanks 12 of the upper face 11 of the first part 21 of the housing 7, constitute sliding areas, and more particularly sliding planes.

[0073] Here, and as illustrated in figures 4 And 5The connecting element 14 has a male shape that cooperates with the internal contour of the first part 21 of the housing 7, which is formed in the form of a profile. The connecting element 14 includes a shoulder that cooperates with the internal contour of the first part 21 of the housing 7 so as to position the connecting element 14 relative to the first part 21 of the housing 7 and to prevent the connecting element 14 from moving relative to the first part 21 of the housing 7. The connecting element 14 includes guiding means 28 for the side walls 9 of the second part 22 of the housing 7, and in particular slots for the passage of the side walls 9 through at least a portion of the connecting element 14.Thus, the assembly of the side walls 9 of the second part 22 of the housing 7 with the connecting element 14 is achieved by sliding each side wall 9 of the second part 22 of the housing 7 relative to the connecting element 14, and in particular relative to the passage slots 28 of the connecting element 14. In addition, the guiding means 28 of the connecting element 14 ensure a spacing between the side walls 9 of the second part 22 of the housing 7.

[0074] The side walls 9 of the second part 22 of the housing 7 are fixed to the connecting element 14 by tightening fixing screws 29, in particular by tightening fixing screws 29 that pass through the connecting element 14 on both sides and open into the slots 28 of the connecting element 14. As illustrated in Figures 5 And 7The connecting element 14 includes through holes for the fixing screws 29. The side walls 9 of the second part 22 of the housing 7 include screw holes 31 for the fixing screws 29, specifically self-tapping screws. The screw holes 31 in the side walls 9 of the second part 22 of the housing 7 are formed in the side walls 9, which are profiled.

[0075] Advantageously, the end of the second part 22 of the housing 7, which is formed by the upper wall 8 and lateral walls 9, opposite the connection of the second part 22 of the housing 7 with the first part 21 of the housing 7, is closed by a plug 16. Thus, the closure of the free end of the second part 22 of the housing 7 formed by the upper wall 8 and lateral walls 9, opposite the connection with the first part 21 of the housing 7, is implemented at the lowest cost, while guaranteeing the modularity and customization of the different models of actuators 4, in particular by giving the possibility of replacing the plug 16 with another depending on the model of actuator 4.In addition, the plug 16 sealing the end of the second part 22 of the housing 7 formed by the upper 8 and lateral 9 walls of the second part 22 of the housing 7 helps to protect the motion transmission system 6 from the environment of the linear actuator 4, in particular from water or projectiles such as gravel. Furthermore, the attachment of the plug 16 to the upper 8 and lateral 9 walls of the second part 22 of the housing 7 allows for the securing of all the walls 8 and 9 constituting the second part 22 of the housing 7. In practice, the plug 16 is attached to the upper 8 and lateral 9 walls of the second part 22 of the housing 7 by means of fixing screws 30. The attachment of the plug 16 to the upper 8 and lateral 9 walls of the second part 22 of the housing 7 is achieved by tightening fixing screws 30, in particular by tightening fixing screws 30 that pass through the plug 16 on both sides.

[0076] Advantageously, the plug 16 also makes it possible to mask differences in alignment of the free ends of the upper 8 and lateral 9 walls of the second part 22 of the housing 7 by covering the free end of each of the upper 8 and lateral 9 walls. These differences in alignment of the free ends of the upper 8 and lateral 9 walls of the second part 22 of the housing 7 can be due in particular to the assembly of the upper 8 and lateral 9 walls of the second part 22 of the housing 7 with the first part 21 of the housing 7, and possibly with the joining element 14.

[0077] In the embodiment illustrated in figures 2 , 7 And 8The plug 16 includes through holes 37 for the fixing screws 30. The upper 8 and side 9 walls of the second part 22 of the housing 7 include screw holes 31, 34 for the fixing screws 30, specifically self-tapping screws. The screw holes 31, 34 in the upper 8 and side 9 walls of the second part 22 of the housing 7 are formed in the upper 8 and side 9 walls, which are made in the form of a profile. The screw holes 31 in the side walls 9 of the second part 22 of the housing 7, which cooperate with the fixing screws 29, and those cooperating with the fixing screws 30, are made with the same shapes extending along the entire length of the side walls 9, so as to reduce the cost of obtaining the profiles constituting the side walls 9 of the second part 22 of the housing 7.

[0078] Preferably, the plug 16, which closes the end of the second part 22 of the housing 7 formed by the upper 8 and lateral 9 walls of the second part 22 of the housing 7, supports a bearing 17 that cooperates with the motion transmission system 6, in particular with the threaded rod 19 having a smooth end, i.e., without threads. Thus, the plug 16, which closes the free end of the second part 22 of the housing 7 formed by the upper 8 and lateral 9 walls of the second part 22 of the housing 7, serves both to protect the motion transmission system 6 from the environment of the linear actuator 4 and to guide the motion transmission system 6 within the second part 22 of the housing 7.

[0079] Here, and as illustrated in figures 4 And 8 , the bearing 17 inserted in the plug 16 is a plain bearing, or commonly called a bushing.

[0080] We will now describe, with reference to Figures 10 to 12 , a second embodiment of the invention.

[0081] The second part 22 of the housing 7 comprises a profiled element, the profiled element having a transverse face 47, also referred to hereafter as the upper face 47, and two lateral faces 49. The transverse face 47 extends between the two lateral faces 49 of the second part 22 of the housing 7. Advantageously, the profiled element of the second part 22 of the housing 7 is made of a metallic material, and preferably of aluminum. The profiled element of the second part 22 of the housing 7 forms a hollow body comprising a longitudinal recess 24 in a lower plane of the second part 22 of the housing 7. The displacement element 18 is moved through the longitudinal recess 24 when the electric motor 12 is activated.

[0082] The cover element 46 is formed by a wall distinct from the first and second parts 21, 22 of the housing 7. Thus, the linear actuator 4 formed by means of the first and second parts 21, 22 of the housing 7 further comprises a common element consisting of a distinct wall forming the cover element 46. The cover element 46 is a wall, like a hood, disposed above the transverse face 47 of the second part 22 of the housing 7 and above the upper face 11 of the first part 21 of the housing 7. The cover element 46 covers the transverse face 47 of the second part 22 of the housing 7.

[0083] Thus, the distribution of the forces of the connection between the first and second parts 21, 22 of the housing 7 of the linear actuator 4 can be improved through the wall of the cover element 46 covering at least in part the upper face 11 of the first part 21 of the housing 7 and the upper face 47 of the second part 22 of the housing 7.

[0084] In this way, the covering at least in part of the upper face 11 of the first part 21 of the housing 7 and of the upper face 47 of the second part 22 of the housing 7 by the wall of the cover element 46 makes it possible to improve the perceived quality of the linear actuator 4, and in particular to convey a perception of robustness by a monobloc appearance obtained by the use of the cover element 46 as a common part between the first and second parts 21, 22 of the housing 7.

[0085] The covering at least in part of the upper face 11 of the first part 21 of the housing 7 and of the upper face 47 of the second part 22 of the housing 7 by the wall of the cover element 46 also makes it possible to mask the connection between the first and second parts 21, 22 of the housing 7.

[0086] Here, and as illustrated in Figures 10 And 11 , the wall of the cover element 46 completely covers the upper face 11 of the first part 21 of the housing 7.

[0087] Thus, the complete covering of the upper face 11 of the first part 21 of the housing 7 by the wall of the covering element 46 makes it possible to further improve the perceived quality of the linear actuator 4, and in particular to convey the perception of robustness by a monobloc appearance over the entire length of the housing 7 comprising the first and second parts 21, 22.

[0088] Advantageously, the upper face 47 of the second part 22 of the housing 7 includes a longitudinal recess 48. Thus, following the removal of the cover element 46, the longitudinal recess 48 of the upper face 47 of the second part 22 of the housing 7 allows access from above to the space defined by the second part 22 of the housing 7, in particular during an installation or maintenance operation of the linear actuator 4, so as to facilitate the handling by the operator.

[0089] Preferably, the cover element 46 and the second part 22 of the housing 7 are joined together by guide means 10. Thus, the cover element 46 and the second part 22 of the housing 7 are connected by guide means 10 so as to form a single unit. Furthermore, the assembly of the cover element 46 and the second part 22 of the housing 7 is achieved by sliding between the cover element 46 and the second part 22 of the housing 7 along the guide means 10.Furthermore, the sliding of the cover element 46 relative to the second part 22 of the housing 7 via the guide means 10 allows access from above to the space defined between the cover element 46 and the second part 22 of the housing 7, and potentially to the space defined by the second part 22 of the housing 7 by means of the longitudinal recess 48 provided in the upper face 47 of the second part 22 of the housing 7, particularly during installation or maintenance of the linear actuator 4, thus facilitating handling by the technician. In this way, the sliding of the cover element 46 relative to the second part 22 of the housing 7 via the guide means 10 allows access to the motion transmission system 6 through the longitudinal recess 48 provided in the upper face 47 of the second part 22 of the housing 7.In addition, the sliding of the cover element 46 relative to the second part 22 of the housing 7 through the guide means 10 allows access to at least one sensor (not shown) and / or at least one mechanical stop (not shown) disposed between the cover element 46 and the second part 22 of the housing 7, and possibly inside the second part 22 of the housing 7 through the longitudinal recess 48 provided in the upper face 47 of the second part 22 of the housing 7.

[0090] Advantageously, the guiding means 10 of the cover element 46 and of the second part 22 of the housing 7, in particular of the upper part of the second part 22 of the housing 7, are connecting elements forming ribs 10a and grooves 10b of conjugate shapes, that is to say elements projecting from one wall and fitting together, in particular by sliding, into corresponding recessed elements of another wall.

[0091] Here, the lateral faces 49 of the second part 22 of the housing 7 have a rib 10a at their upper end, in particular along their extension above the upper face 47 of the second part 22 of the housing 7, and the cover element 46 has a groove 10b at each of its two ends so that the grooves 10b of the cover element 46 engage respectively by sliding into the rib 10a of each lateral face 49 of the second part 22 of the housing 7. Thus, the assembly of the cover element 46 and the second part 22 of the housing 7 is achieved by sliding between them along the connecting elements forming ribs 10a and grooves 10b. In this way, the assembly of the cover element 46 and the second part 22 of the housing 7 is inexpensive, simple and quick to implement during the manufacture of the linear actuator 4, and without the need for specific tooling.In addition, such guiding means 10 make it possible to guarantee the aesthetics of the linear actuator 4 since they are invisible following the assembly of the cover element 46 and the second part 22 of the housing 7.

[0092] Here, and as illustrated in Figures 10 And 12 The ribs 10a are formed by a projecting, dovetail-shaped element, i.e., a trapezoidal shape. The associated grooves 10b correspond to a recessed element of the same shape. Thus, the dovetail shape of the ribs 10a and the grooves 10b prevents the second part 22 of the housing 7 from separating from the cover element 46 after they are joined by sliding.

[0093] In another embodiment, the ribs 10a are formed respectively by a projecting element of longitudinal shape, in particular straight or curved. And the associated grooves 10b correspond respectively to a recessed element of the same shape.

[0094] Preferably, the cover element 46, being made by a wall distinct from the first and second parts 21, 22 of the housing 7, includes guide means 27 cooperating with guide means 12 of the first part 21 of the housing 7. The cover element 46 thus constitutes effective protection against dust, and a relatively flat surface that is easy to clean.

[0095] The perception of robustness by a monobloc aspect between the first and second parts 21, 22 of the housing 7 of the linear actuator 4 is also guaranteed by the guiding means 27 of the additional wall 46 disposed above the first and second parts 21, 22 of the housing 7 cooperating with the guiding means 12 of the first part 21 of the housing 7.

[0096] Advantageously, the guiding means 12, 27 of the cover element 46 and the first part 21 of the housing 7 are sliding connection elements. Thus, the assembly of the cover element 46 with the first part 21 of the housing 7 is achieved by sliding the cover element 46 relative to the first part 21 of the housing 7, and in particular relative to guide flanges 12 of the upper face 11 of the first part 21 of the housing 7. In this way, the assembly of the cover element 46 with the first part 21 of the housing 7 is inexpensive, simple, and quick to implement during the manufacture of the linear actuator 4, and without the need for specific tooling. In addition, such guiding means 12, 27 make it possible to guarantee the aesthetics of the linear actuator 4 since they are invisible following the assembly of the cover element 46 with the first part 21 of the housing 7.

[0097] The guide elements 12, 27 connecting the cover element 46 to the first part 21 of the housing 7, and in particular the guide flanks 27 of the cover element 46 and the guide flanks 12 of the upper face 11 of the first part 21 of the housing 7, constitute sliding zones, that is to say, sliding planes relative to each other.

[0098] In this second embodiment of the invention, in the case where the upper face 11 of the first part 21 of the housing 7 includes a recess, the edges forming the recess of the upper face 11 of the first part 21 of the housing 7 can include the guiding means 12 of the first part 21 of the housing 7 cooperating with the guiding means 10 of the additional wall constituting the cover element 46.

[0099] In such a case, the guiding means 12 of the first part 21 of the housing 7 can be ribs, in particular identical to those extending in the continuation of the lateral faces 49 of the second part 22 of the housing 7.

[0100] Here, the guiding means 10 of the additional wall 46, in particular the groove 10b at each of its two ends, cooperate on the one hand with the guiding means 10 made in alignment with the lateral faces 49 of the second part 22 of the housing 7, in particular the rib 10a at each of the projecting ends, and on the other hand with the guiding means 12 of the first part 21 of the housing 7 so as to constitute the guiding means 27. Thus, the guiding means 10 of the additional wall 46, in particular the groove 10b at each of its two ends, are identical so as to cooperate with the guiding means 10 of the second part 22 of the housing 7 and the guiding means 12 of the first part 21 of the housing 7.

[0101] Preferably, the second part 22 of the housing 7 is connected to the first part 21 of the housing 7 by means of a connecting element 14. The covering element 46 formed by the additional wall cooperates with guiding means 15 of the connecting element 14, here constituted by guiding flanks 15 of the connecting element 14. Thus, the additional wall 46 is positioned relative to the first and second parts 21, 22 of the housing 7 by means of guiding means 15 of the connecting element 14 participating in the connection between the second part 22 of the housing 7 and the first part 21 of the housing 7.

[0102] In this second embodiment illustrated in Figures 10 to 12The assembly of the additional wall 46 with the first and second parts 21, 22 of the housing 7 is achieved by sliding the additional wall 46 relative to the second part 22 of the housing 7, then to the connecting element 14, and to the first part 21 of the housing 7, and in particular relative to connecting elements 10 of the second part 22 of the housing 7, to guide flanges 15 of the upper face 13 of the connecting element 14 and to guide flanges 12 of the upper face 11 of the first part 21 of the housing 7. In this way, the assembly of the additional wall 46 with the connecting element 14 and with the first and second parts 21, 22 of the housing 7 is inexpensive, simple and quick to implement during the manufacture of the linear actuator 4, and without the need for specific tooling.Furthermore, the guiding means 12, 15, 27 ensure the aesthetics of the linear actuator 4 since they are invisible following the assembly of the additional wall 46 with the connecting element 14 and the first part 21 of the housing 7.

[0103] The guide elements 12, 15, 27 connecting the additional wall 46 to the connecting element 14 and to the first part 21 of the housing 7, and in particular the guide flanks 27 of the additional wall 46, the guide flanks 15 of the upper face 13 of the connecting element 14 and the guide flanks 12 of the upper face 11 of the first part 21 of the housing 7, constitute sliding areas, and more particularly sliding planes.

[0104] In this second embodiment illustrated in Figures 10 to 12The connecting element 14 includes guiding means 28 for the lateral faces 49 of the second part 22 of the housing 7, and in particular slots for the passage of the lateral faces 49 through at least a part of the connecting element 14. Thus, the assembly of the lateral faces 49 of the second part 22 of the housing 7 with the connecting element 14 is achieved by sliding each lateral face 49 of the second part 22 of the housing 7 relative to the connecting element 14, and in particular relative to the passage slots 28 of the connecting element 14.

[0105] Here, the fixing of the side faces 49 of the second part 22 of the housing 7 to the connecting element 14 is achieved by screwing in fixing screws, in particular by screwing in fixing screws passing through the connecting element 14 on both sides and opening into the passage slots 28 of the connecting element 14. At the Figure 10The screws for fixing the side faces 49 of the second part 22 of the housing 7 to the connecting element 14 are not shown. However, these are similar to the fixing screws 29 shown in the figure 7 of the first embodiment of the invention. In the second embodiment, the connecting element 14 includes through holes for the fastening screws. And the side faces 49 of the second part 22 of the housing 7 include screw holes 31 cooperating with the fastening screws, in particular self-tapping screws. Here, the screw holes 31 in the side faces 49 of the second part 22 of the housing 7 are formed in the second part 22 of the housing 7, which is made in the form of a profiled block.

[0106] Advantageously, the end of the second part 22 of the housing 7, opposite the connection of the second part 22 of the housing 7 with the first part 21 of the housing 7, is closed by a plug 16. Thus, the closure of the free end of the second part 22 of the housing 7, opposite the connection with the first part 21 of the housing 7, is implemented at the lowest cost, while ensuring the modularity and customization of the different actuator models 4, in particular by giving the possibility of replacing the plug 16 with another depending on the actuator model 4. In addition, the plug 16 closing the end of the second part 22 of the housing 7 makes it possible to protect the motion transmission system 6 from the environment of the linear actuator 4, in particular from water or projectiles such as gravel.Furthermore, the plug 16 also serves to close the gap between the second part 22 of the housing 7 and the cover element 46. In this way, the fastening of the plug 16 to the second part 22 of the housing 7 and the cover element 46 secures the assembly. Specifically, the plug 16 is fastened to the second part 22 of the housing 7 and to the cover element 46 by means of fastening screws 30. Here, the fastening of the plug 16 to the second part 22 of the housing 7 and the cover element 46 is achieved by tightening fastening screws 30, in particular by tightening fastening screws 30 that pass through the plug 16 on both sides.

[0107] Advantageously, the plug 16 also makes it possible to mask differences in alignment of the free ends of the second part 22 of the housing 7 and the cover element 46 by covering the free end of the second part 22 of the housing 7 and the additional wall constituting the cover element 46. These differences in alignment of the free ends of the second part 22 of the housing 7 and the cover element 46 can be due in particular to the assembly of the second part 22 of the housing 7 and the cover element 46 with the first part 21 of the housing 7, and possibly with the joining element 14.

[0108] In the embodiment illustrated in the Figure 10The plug 16 includes through holes 37 for the fixing screws 30. The second part 22 of the housing 7 and the cover element 46 include screw holes 31, 34 cooperating with the fixing screws 30, in particular self-tapping screws. The screw holes 31, 34 of the second part 22 of the housing 7 and of the cover element 46 are formed in the second part 22 of the housing 7, which is made in the form of a profiled block, and in the additional wall constituting the cover element 46, which is made in the form of a profile. The screw holes 31 of the side faces 49 of the second part 22 of the housing 7 cooperating with the fixing screws of the joining element 14, and those cooperating with the fixing screws 30 of the plug 16 are made by the same shapes extending over the entire length of the side faces 49, so as to reduce the cost of obtaining the profiled block constituting the second part 22 of the housing 7.

[0109] Preferably, the plug 16 sealing the end of the second part 22 of the housing 7 supports a bearing 17 cooperating with the motion transmission system 6, in particular with the threaded rod 19 having a smooth end, i.e., without threads. Thus, the plug 16 sealing the free end of the second part 22 of the housing 7 serves, on the one hand, to protect the motion transmission system 6 from the environment of the linear actuator 4, and on the other hand, to guide the motion transmission system 6 within the second part 22 of the housing 7.

[0110] Here, the bearing 17 inserted into the plug 16 is a plain bearing, or commonly called a bushing.

[0111] We will now describe, with reference to figures 2 to 12 , other characteristics related to the first and second embodiments of the invention.

[0112] Advantageously, the end of the first part 21 of the housing 7, opposite the connection with the second part 22 of the housing 7, is closed by an end piece 23. The end piece 23 closing the free end of the first part 21 of the housing 7 makes it possible to protect in particular the electric motor 5 from the environment of the linear actuator 4, in particular from water or projectiles such as gravel. The attachment of the end piece 23 to the first part 21 of the housing 7 and to the connecting element 14 is achieved by tightening the fixing screws 32, in particular by tightening the fixing screws 32 which pass through the end piece 23 on both sides. Thus, removing the end piece 23, which closes the free end of the first part 21 of the housing 7, in particular by unscrewing the fixing screws 32, allows access to the electric motor 5 located inside the first part 21 of the housing 7. With reference to figures 4 to 6The end piece 23 includes holes for the fixing screws 32. The first part 21 of the housing 7 includes screw holes cooperating with the fixing screws 32. And the connecting element 14 includes screw holes cooperating with the fixing screws 32. The fixing screws 32 are self-tapping screws. The screw holes in the first part 21 of the housing 7 are formed in the faces of the contour of the first part 21 of the housing 7, the first part 21 of the housing 7 being made as a single profile.

[0113] Here, and as illustrated in figures 4 , 6 , 7 , 10 And 11 , a cover 39 is arranged on the end piece 23 so as to extend the cover element 46, and to compensate for the assembly tolerances of the wall constituting the cover element 46 on the first part 21 of the housing 7.

[0114] In this embodiment, the cover 39 assembled onto the end piece 23 is made of two parts. And the cover 39 is fixed to the end piece 23 by means of fastening, such as, for example, elastic snap-fit ​​elements.

[0115] In the first embodiment illustrated in figures 2 to 9The guide means 10b of the upper wall 8 of the second part 22 of the housing 7 cooperate with the guide means 10a of the side walls 9 of the second part 22 of the housing 7 so that the upper wall 8 of the second part 22 of the housing 7 slides relative to the side walls 9 of the second part 22 of the housing 7. And the guide means 27 of the upper wall 8 of the second part 22 of the housing 7 cooperate with the guide means 12 of the first part 21 of the housing 7 so that the upper wall 8 of the second part 22 of the housing 7 slides relative to the first part 21 of the housing 7, in particular up to the end piece 23 fixed on the first part 21 of the housing 7.

[0116] In addition, the guide means 27 of the upper wall 8 of the second part 22 of the housing 7 also cooperate with the guide means 15 of the connecting element 14 so that the upper wall 8 of the second part 22 of the housing 7 slides relative to the connecting element 14 arranged between the second part 22 and the first part 21 of the housing 7.

[0117] In the second embodiment illustrated in Figures 10 to 12The guide means 10b of the additional wall 46 cooperate with the guide means 10a of the second part 22 of the housing 7 so that the additional wall 46 slides relative to the second part 22 of the housing 7. And the guide means 27 of the additional wall 46 cooperate with the guide means 12 of the first part 21 of the housing 7 so that the additional wall 46 slides relative to the first part 21 of the housing 7, in particular up to the end piece 23 fixed on the first part 21 of the housing 7.

[0118] In addition, the guide means 27 of the additional wall 46 also cooperate with the guide means 15 of the connecting element 14 so that the additional wall 46 slides relative to the connecting element 14 arranged between the second part 22 and the first part 21 of the housing 7.

[0119] Advantageously, the end piece 23 fixed to the first part 21 of the housing 7 includes a pin 33, where the pin 33 cooperates with a hole 34 of the cover element 46, as illustrated for example in figures 6 , 7 , 9 , 10 And 12 . Thus, the cover element 46 is blocked in translation by the positioning of the pin 33 of the end piece 23 in the hole 34 of the cover element 46.

[0120] Furthermore, the positioning of the pin 33 of the tip 23 in the hole 34 of the cover element 46 makes it possible to avoid a displacement along a direction orthogonal to the upper face 11 of the first part 21 of the housing 7, in other words a vertical displacement.

[0121] Here, and as illustrated in figures 7 And 10, the screw hole 34 of the cover element 46 cooperating with the fixing screw 30 and the hole 34 of the cover element 46 cooperating with the pin 33 of the end piece 23 are made by the same shapes extending over the entire length of the cover element 46, so as to reduce the cost of obtaining the profile constituting the cover element 46.

[0122] In the first embodiment, the cover element 46 is constituted by the upper wall 8 of the second part 22 of the housing 7. And in the second embodiment, the cover element 46 is constituted by a wall distinct from the first and second parts 21, 22 of the housing 7.

[0123] Hole 34 is made in a rib extending over the inner face of the cover element 46.

[0124] Here, and as illustrated in figures 7 And 10, the upper face 11 of the first part 21 of the housing 7 includes a groove 38 for the passage of the rib formed on the inner face of the wall of the cover element 46.

[0125] And the upper face 13 of the joining element 14 also includes a groove 44 for the passage of the rib formed on the inner face of the cover element 46.

[0126] The groove 38 of the upper face 11 of the first part 21 of the housing 7 and the groove 44 of the upper face 13 of the connecting element 14 are of identical shape and aligned one after the other so as to allow the rib formed on the inner face of the wall of the cover element 46 to slide inside the grooves 38 and 44.

[0127] Thanks to the present invention, such a linear actuator formed by means of the first and second parts of the housing comprises a common element consisting of the cover element covering on the one hand the upper side of the second part of the housing and on the other hand at least in part the upper side of the first part of the housing.

[0128] In this way, the covering at least in part of the upper side of the first part of the housing and the upper side of the second part of the housing by the cover element improves the perceived quality of the linear actuator, and in particular conveys a perception of robustness through a monobloc appearance obtained by using the cover element as a common part between the first and second parts of the housing.

[0129] In addition, the distribution of the linkage forces between the first and second parts of the linear actuator housing can be improved through the cover element covering on one side the upper side of the second part of the housing and on the other side at least partially the upper side of the first part of the housing.

[0130] Of course, many modifications can be made to the examples of embodiment described above without departing from the scope of the invention.

[0131] In particular, the material of the first and second parts of the casing may be different, especially in plastic.

[0132] Furthermore, the embodiments and variants mentioned above can be combined with each other to generate other embodiments of the invention.

Claims

1. A linear actuator (4) intended to maneuver a screen (3) closing off an opening (2) made in a building or an enclosure, the linear actuator (4) being intended to be coupled on the one hand to the screen (3) and on the other hand to the building or to the enclosure, the linear actuator (4) comprising at least: - an electric motor (5), - a reduction gear (36), - a movement transmission system (6), the movement transmission system (6) comprising a threaded rod (19) and a nut (20), the threaded rod (19) being rotated by the electric motor (5) and the reduction gear (36), and the nut (20) being translated on the threaded rod (19), and - a casing (7) comprising a first part (21) inside which the electric motor (5) is positioned, and a second part (22) inside which the movement transmission system (6) is positioned, the first and second parts (21, 22) of the casing (7) being assembled to one another so as to form a connection, the casing (7) having an exposed side corresponding to an outer side of the linear actuator (4), the outer side of the casing (7) being the upper side of the casing (7) in the assembled position of the linear actuator (4) relative to the concealing device (1), characterized in that the linear actuator (4) further comprises: - an element common to the first part (21) of the casing (7) and the second part (22) of the casing (7), the common elements being a covering element (46) covering the upper side of the second part (22) of the casing (7) and at least part of the upper side of the first part (21) of the casing (7), so as to hide the connection between the first and second parts (21, 22) of the casing (7), on the upper side of the casing (7).

2. The linear actuator (4) according to claim 1, characterized in that the second part (22) of the casing (7) comprises two side walls (9) and one transverse wall (8) extending between the two side walls (9), where the covering element (46) is made by the transverse wall (8) of the second part (22) of the casing (7).

3. The linear actuator (4) according to claim 2, characterized in that the transverse (8) and side (9) walls of the second part (22) of the casing (7) are assembled to one another by guide means (10), preferably making up guideway connections.

4. The linear actuator (4) according to claim 3, characterized in that the guide means (10) of the transverse (8) and side (9) walls of the second part (22) of the casing (7) comprise connecting elements forming ribs (10a) and grooves (10b) having conjugated profiles.

5. The linear actuator (4) according to claim 1, characterized in that the covering element (46) is made by a separate wall from the first and second parts (21, 22) of the casing (7).

6. The linear actuator (4) according to claim 5, characterized in that a transverse face (47) of the second part (22) of the casing (7) comprises a longitudinal recess (48).

7. The linear actuator (4) according to claim 5 or claim 6, characterized in that the covering element (46) and the second part (22) of the casing (7) are assembled to one another by guide means (10).

8. The linear actuator (4) according to claim 7, characterized in that the guide means (10) of the covering element (46) and the second part (22) of the casing (7) comprise connecting means forming ribs (10a) and grooves (10b) having conjugated profiles.

9. The linear actuator (4) according to any one of claims 1 to 8, characterized in that the covering element (46) comprises guide means (27) cooperating with guide means (12) of the first part (21) of the casing (7).

10. The linear actuator (4) according to claim 9, characterized in that the guide means (12, 27) of the covering element (46) and the first part (21) of the casing (7) are sliding connecting elements.

11. The linear actuator (4) according to any one of claims 1 to 10, characterized in that the second part (22) of the casing (7) is coupled to the first part (21) of the casing (7) using a junction element (14), the covering element (46) cooperating with guiding means (15) of the junction element (14).

12. The linear actuator (4) according to any one of claims 1 to 11, characterized in that one end of the second part (22) of the casing (7), opposite the first part (21) of the casing (7), is closed off by a stopper (16).

13. The linear actuator (4) according to claim 12, characterized in that the stopper (16) closing off the end of the second part (22) of the casing (7) supports a bearing (17) cooperating with the movement transmission system (6).

14. The linear actuator (4) according to any one of claims 1 to 13, characterized in that one end of the first part (21) of the casing (7), opposite the second part (22) of the casing (7), is closed off by an endpiece (23).

15. The linear actuator (4) according to any one of claims 1 to 14, characterized in that the covering element (46) has an exposed outer face with a uniform profile, and the covering element (46) preferably has a uniform section.

16. A concealing device (1) comprising at least one screen (3) able to be moved about an axis of rotation (25) and rotated by a linear actuator (4), characterized in that the concealing device (1) comprises a linear actuator (4) according to any one of claims 1 to 15.