• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An electromechanical actuator for a home automation installation comprises an electric motor (12) comprising a rotor (13) and a stator (14), wherein the rotor (13) comprises a rotor shaft (24) having an end (24a) supported by a bearing (26), wherein the stator (14) comprises a stator body (18) comprising an annular housing (32) within which the bearing (26) is disposed. The bearing (26) is mounted with a free fit within the annular housing (32) of the stator body (18), the free fit being defined by: a first axial operating clearance and a second radial operating clearance . An annular resilient seal (35) is disposed about the bearing (26), the annular resilient seal (35) being compressed between the annular surface of the annular housing (32) and an outer annular surface of the bearing (26). A first abutment of the annular housing (32) of the stator body (18) is formed by plastic deformation of the stator body (18).
    公开号:FR3018965A1
    申请号:FR1452319
    申请日:2014-03-20
    公开日:2015-09-25
    发明作者:Michel Roger；Fabrice Gilet；Denis Magli；Pierre Brion；Fabrizio Girola
    申请人:Somfy SA；
    IPC主号:
    专利说明:

    [0001] The present invention relates to an electromechanical actuator comprising an electric motor, as well as to a home automation system for closing or solar protection comprising such an actuator, and to a method for the manufacture of said actuator. such an actuator. In general, the present invention relates to the field of occultation devices comprising a motorized drive device moving a screen between at least a first position and a second position.
    [0002] A motorized drive device comprises an electromechanical actuator of a movable closure, concealment or sun protection element such as a shutter, a door, a grating, a blind, or any other equivalent material, hereafter called screen. Document EP 1 420 502, which describes an electronically commutated brushless DC electric motor comprising a rotor and a stator positioned coaxially around an axis of rotation, is already known. The rotor comprises a rotor shaft. A first end of the rotor shaft is supported by a first bearing. And a second end of the rotor shaft is supported by a second bearing. The stator includes a stator body and a stator core. The stator body comprises a first annular housing inside which is disposed the first bearing, and a second annular housing within which is disposed the second bearing. The first bearing comprises a rolling member, the rolling member being a needle bearing. The second bearing comprises a rolling member, the rolling member being a ball bearing.
    [0003] The first and second bearings are respectively mounted with a tight fit in the first and second annular housing of the stator body. However, this electric motor has the disadvantage of implementing an expensive solution by means of two bearings each comprising a rolling member. The use of the first bearing as a small-sized needle roller bearing is also expensive. In addition, the mounting of the first bearing within the first annular housing of the stator body is complex, since the first bearing is a needle bearing where the outer ring is mounted with a snug fit in the first annular housing of the stator body.
    [0004] Furthermore, the assembly tolerances of the first and second bearings in the first and second annular housing of the stator body, as well as the design tolerances of the first and second annular housing and the rotor shaft are precise to limit the constraints. on the rotor shaft, which generates high manufacturing costs.
    [0005] Therefore, to limit manufacturing costs, one solution would be to use less precise assembly and sizing tolerances. However, during the rotational drive of the rotor, such an assembly generates vibrations caused, in particular, by a bearing mounted loosely. The object of the present invention is to solve the abovementioned drawbacks and to propose an electromechanical actuator, a home automation system for closing or solar protection comprising such an actuator, as well as a method of manufacturing such an actuator, making it possible to assemble a rotor and a stator of an electric motor by means of at least one bearing by limiting the vibrations of the electric motor during the rotational drive of the rotor shaft while minimizing the manufacturing costs of the electric motor of a electromechanical actuator, as well as the stresses on the rotor shaft. For this purpose, the present invention aims, in a first aspect, an electromechanical actuator for a home automation system for closing or sun protection comprising an electric motor, the electric motor comprising a rotor and a stator coaxially positioned around an axis of rotation, wherein the rotor comprises a rotor shaft, the rotor shaft having a bearing-supported end, wherein the stator comprises a stator core and a stator body, the stator body including an annular housing at the inside which the bearing is arranged.
    [0006] According to the invention, the bearing is mounted with a free fit inside the annular housing of the stator body, the free adjustment being defined by a first set of axial operation, this first set of axial operation being realized by a difference between, on the one hand, an axial length, measured along the axis of rotation, between a first abutment and a second abutment of the annular housing of the stator body and, on the other hand, an axial length of the bearing, and a second radial operating clearance, the second radial operating clearance being formed between an outer annular surface of the bearing and the annular surface of the annular housing of the stator body. An annular elastic seal is disposed around the bearing, the annular resilient seal being compressed between the annular surface of the annular housing of the stator body and an outer annular surface of the bearing. And the first abutment of the annular housing of the stator body is formed by plastic deformation of the stator body. Thus, the electromechanical actuator comprises an electric motor provided with a stator inside which is rotated a rotor, wherein the rotor comprises a rotor shaft supported by a bearing, and where an annular elastic seal is mounted between the bearing and the annular housing receiving the bearing, so as to limit the vibrations of the electric motor during the rotary drive of the rotor shaft and to correct the alignment of the rotor shaft inside the body of stator while minimizing the manufacturing costs of the electric motor of an electromechanical actuator. In this way, the electric motor thus comprises an annular housing of the stator body inside which is inserted a bearing, where the bearing has dimensions allowing it to be movable in the axial and radial directions inside the housing. annular of the stator body. In addition, the annular elastic seal dampens the transmission of vibrations between the rotor shaft and the stator, as well as with an output shaft of the electric motor.
    [0007] In this way, the damping of the vibrations by means of the annular elastic seal makes it possible to limit the wear of the elements constituting the electromechanical actuator and to minimize the noise generated by vibrations at the level of the home automation installation. In addition, the annular elastic seal makes it possible to correct the alignment between the rotor shaft and the stator body. In this way, the correction of the alignment of the rotor shaft by means of the annular elastic seal also makes it possible to limit the wear of the elements constituting the electromechanical actuator and to minimize the noise generated by vibrations at the level of the rotor. home automation system.
    [0008] The annular elastic seal mounted around the bearing makes it possible to make a connection of the ball-and-socket type between the rotor shaft and the annular housing of the stator body. Thus, the annular elastic seal mounted around the bearing allows the rotor shaft to be rotatable about the axis of rotation of the electric motor. In addition, the first abutment of the annular housing of the stator body is made simply, quickly and inexpensively. The introduction of a tool inside the stator body makes it easy to form the first stop after the introduction of the bearing in the annular housing of the stator body. Such an assembly also makes it possible to reduce the accuracy of the tolerances of the elements constituting the electric motor, in particular at the level of the stator and of the rotor, so as to reduce the cost of obtaining it. Practically, the stator body is made of plastic. Advantageously, the second abutment of the annular housing of the stator body is formed by an end wall of the annular housing of the stator body.
    [0009] Preferably, the annular elastic seal mounted around the bearing is disposed between a shoulder of the bearing and a front end face of the bearing. Advantageously, the first abutment of the annular housing of the stator body cooperates with a shoulder of the bearing. In one embodiment, the rotor shaft has another end supported by another bearing, the other bearing comprising a rolling member, while a support comprises another annular housing inside which is disposed the another bearing, the support being connected to the stator body. Advantageously, the annular elastic seal is mounted around the bearing with a free fit.
    [0010] According to a preferred characteristic of the invention, the bearing comprises at least one angular positioning element cooperating with a notch of the stator body. The present invention aims, according to a second aspect, a home automation system for closing or sun protection comprising a windable screen on a winding tube rotated by an electromechanical actuator according to the invention. This home automation system has features and advantages similar to those described above in connection with the electromechanical actuator as mentioned above. The present invention aims, in a third aspect, a method of manufacturing an electromechanical actuator as mentioned above. According to the invention, this method comprises at least the following steps: insertion of the annular elastic seal around the bearing, insertion of the bearing in the annular housing of the stator body, plastic deformation of the stator body, so as to create deformation zones formed on the inner circumference of the stator body. This method of manufacturing an actuator 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: FIG. 1 is a diagrammatic sectional view of a compliant home automation system an embodiment of the invention; Figure 2 is a schematic perspective view of the home automation system shown in Figure 1; Figure 3 is a schematic sectional view of an electric motor of an electromechanical actuator according to one embodiment of the invention for a home automation system as illustrated in Figures 1 and 2; Figure 4 is a perspective sectional view of the motor of Figure 3; the figures is an enlarged view of detail V in Figure 3 illustrating the mounting of a first bearing and an annular elastic seal in a first annular housing of a rotor body; Figure 6 is a perspective view in section of the engine of Figures 3 to 5, through the sectional plane VI-VI in Figure 3; and FIG. 7 is an exploded view of the electric motor illustrated in FIGS. 3 to 6. First of all, with reference to FIGS. 1 and 2, a home automation installation according to the invention and installed in a building comprising an opening will be described first. 1, window or door, equipped with a screen 2 belonging to a concealment device 3, in particular a motorized roller shutter.
    [0011] The concealment device 3 may be a rolling shutter, a fabric blind or with adjustable blades, or a rolling gate. Of course, the present invention applies to all types of occulting device. With reference to FIGS. 1 and 2, a shutter according to one embodiment of the invention will be described.
    [0012] The screen 2 of the occulting device 3 is wound on a winding tube 4 driven by a motorized drive device 5 and movable between a wound position, particularly high, and a unwound position, particularly low. The motorized drive device 5 comprises an electromechanical actuator 11, in particular of the tubular type, making it possible to rotate the winding tube 4 so as to unroll or wind up the screen 2 of the concealment device 3. occultation 3 comprises the winding tube 4 for winding the screen 2, wherein, in the mounted state, the electromechanical actuator 11 is inserted into the winding tube 4. The electromechanical actuator 11 comprises an electric motor 12 , a torque support, and further including a gear reduction device and an output shaft. The electromechanical actuator 11 also comprises a housing, preferably of cylindrical shape. In known manner, a shutter 3 comprises an apron comprising horizontal blades articulated to each other, forming the screen 2 of the shutter 3, and guided by two lateral rails 6. These blades are contiguous when the deck 2 of the shutter 3 reaches its low position unrolled. In the case of a shutter, the wound up position corresponds to the support of a final L-shaped end plate 8 of the deck 2 of the shutter 3 against an edge of a box 9 of the shutter 3, and the low position unrolled corresponds to the support of the final end blade 8 of the deck 2 of the shutter 3 against a threshold 7 of the opening 1. The first blade of the shutter 3, opposite to the blade end, is connected to the winding tube 4 by means of at least one hinge 10.
    [0013] The winding tube 4 is disposed inside the trunk 9 of the roller shutter 3. The apron 2 of the roller shutter 3 winds and unwinds around the winding tube 4 and is housed at least in part at the inside the trunk 9. The motor drive device 5 is controlled by a control unit. The control unit may be, for example, a local control unit 41, where the local control unit 41 may be wired or wirelessly connected to a central control unit 42. The central control unit 42 controls the control unit 41. local control unit 41, as well as other similar local control units distributed throughout the building. The central control unit 42 may be in communication with a remote weather station outside the building, including in particular one or more sensors that can be configured to determine for example a temperature, a brightness, or a wind speed. A remote control 43, which may be a type of local control unit, and provided with a control keyboard, which comprises selection and display means, also allows a user to intervene on the electromechanical actuator 11. and / or the central control unit 42. The motorized drive device 5 is preferably configured to execute the unwinding or winding commands of the screen 2 of the occulting device 3, which can be transmitted in particular by the remote control 43.
    [0014] Control means of the electromechanical actuator 11 according to the invention, allowing the displacement of the screen 2 of the occulting device 3, are constituted by at least one electronic control unit 44. This electronic control unit 44 is adapted to operate the electric motor 12 of the electromechanical actuator 11, and in particular to allow the electrical power supply of the electric motor 12. Thus, the electronic control unit 44 controls, in particular the electric motor 12, so to open or close the screen 2 as previously described. The electronic control unit 44 also comprises an order receiving module, in particular radio orders issued by a command transmitter such as the remote control 43 intended to control the electromechanical actuator 11. Receipt of orders may also allow the reception of orders transmitted by wire means. Here, and as illustrated in FIG. 2, the electronic control unit 44 is disposed inside a casing of the electromechanical actuator 11.
    [0015] The control means of the electromechanical actuator 11 comprise hardware and / or software means. By way of non-limiting example, the hardware means may comprise at least one microcontroller. We will now describe, with reference to FIGS. 3 to 7, an electromechanical actuator according to the invention. The electromechanical actuator 11 is supplied with electrical energy by the power supply network of the sector. It makes it possible to move the screen 2 of the concealment device 3. The mobile screen 2 of the concealment device 3 is a closure, concealment and / or sun protection screen, winding on the tube of winding 4 whose inner diameter is substantially equivalent to the outer diameter of the actuator 11, so that the actuator 11 can be inserted into the winding tube 4 during the assembly of the occulting device 3. In another embodiment, the actuator 11 is intended to be placed in a U-shaped rail. The actuator 11 comprises an electric motor 12. The motor 12 comprises a rotor 13 and a stator 14 positioned coaxially around an axis The rotor 13 comprises a rotor body 15 provided with magnetic elements 16 surrounded by the stator 14. The magnetic elements 16 constitute pairs of poles.
    [0016] Advantageously, the magnetic elements 16 are arranged on the outer circumference of the rotor body 15. The magnetic elements 16 of the rotor 13 constitute a permanent magnet. Thus, the permanent magnet formed by the magnetic elements 16 surrounds the rotor body 15. The permanent magnet is separated from the stator 14 by an air gap 25, radial with respect to the axis of rotation X. The magnetic elements 16 separate constituent the permanent magnet can be reported on the outer circumference of the rotor body 15 by gluing, overmolding or any other known technique.
    [0017] The stator 14 is formed by a stator core 17 comprising polar elements 28 distributed on the periphery of the stator 14, preferably on the outer periphery of the stator 14. The stator 14 also comprises a stator body 18. The rotor body 15 is integrally connected in rotation to a rotor shaft 24.
    [0018] The rotor shaft 24 is centered on the axis of rotation X and protrudes on either side of the rotor body 15. Thus, the rotor shaft 24 comprises a first and a second end 24a, 24b projecting from relative to the rotor body 15. Here, the electric motor 12 is of the brushless dc type with electronic commutation. Advantageously, the rotor body 15 is formed from a sheet stack. In another embodiment, the rotor body 15 is made of a solid shaft. The stator 14 defines a cylindrical internal space E with a circular section in which the rotor 13, including in particular the magnetic elements 16, is positioned, and inside which the rotor 13 is rotated when the motor 12 is operating. The diameter of the cylindrical space E is such that this space E receives the rotor 13 as well as the magnetic elements 16. The magnetic or magnetized part of the rotor 13 located inside the cylindrical space E inside the stator 14, the rotor 13 is called internal rotor. The cylindrical space E also receives a first bearing 26 and a second bearing 27 for rotating support of the rotor shaft 24. Thus, the rotor shaft 24 is rotatably mounted at its two ends 24a and 24b by through the two bearings 26, 27.
    [0019] Here, the first end 24a of the rotor shaft 24 is supported by the first bearing 26, while the second end 24b of the rotor shaft 24 is supported by the second bearing 27. The first and second bearings 26, 27 are thus positioned on either side of the rotor body 15 along the axis of rotation X. Here and as illustrated in FIGS. 3, 4 and 7, the first bearing 26 is a plain bearing, or commonly called a bearing, and preferably made of a self-lubricating material. The first bearing 26 is a part of revolution, and in particular of cylindrical shape. The first bearing comprises two end faces 26a, 26b, these end faces 26a, 26b being orthogonal to the axis of rotation X. The first bearing 26 also comprises two shoulders 26c, 26d, these two shoulders 26c, 26d being disposed respectively between the two end faces 26a, 26b. Here, the rotor shaft 24, in particular the first end 24a of the rotor shaft 24, passes through the first bearing 26.
    [0020] The second bearing 27 comprises a rolling member mounted with a tight fit in a second annular housing 36 of a support 39. The support 39 is connected to the stator body 18. Here, and as illustrated in FIGS. 7, the second bearing 27 is a ball bearing.
    [0021] A central core is here formed by the stator core 17 belonging to the stator 14. The stator core 17 is made of magnetizable material and more specifically of ferromagnetic material. It is generally formed by a stack of sheets and provided with insulating fittings. The pole elements 28 of the core 17 project radially outwardly of the electric motor 12 relative to the axis of rotation X. Windings 29 are positioned around the pole elements 28 of the stator 14. More precisely, each element polar 28 is surrounded by a winding 29 which is specific to it. The coils 29 are connected so that, when traversed by a current, they produce a rotating magnetic field which rotates the rotor 13.
    [0022] The coils 29 are isolated from the stator core 17, in particular by the stator body 18. For the sake of clarity, these coils are not shown in FIG. 6. The stator 14 comprises, on its outer circumference, a cylinder head 30. The yoke 30 surrounds the stator 14, that is to say the central core 17, which is adapted to receive it, and is centered on the axis of rotation X. This yoke 30 allows the circulation of the magnetic flux.
    [0023] The stator body 18 comprises a first annular housing 32 inside which the first bearing 26 is disposed. Here, the stator body 18 is made of plastics material, and in particular by an overmolding operation of the stator core 17. The first annular housing 32 is part of the stator body 18. The stator body 18 is connected to the support 39, in particular by means of resilient detent elements. Here, the support 39 comprises the second annular housing 36 inside which the second bearing 27 is disposed.
    [0024] In another embodiment not illustrated, the second annular housing 36 receiving the second bearing 27 is formed in the stator body 18. The first bearing 26 is mounted with a free fit inside the first annular housing 32 of the body of stator 18, this free adjustment comprising a first axial operating clearance J1 and a second radial operating clearance J2, as shown in FIG. 5. The first axial operating clearance J1 is achieved by a difference between, on the one hand, , an axial length L32 measured along the axis of rotation X, between a first stop 33 and a second stop 34 of the first annular housing 32 of the stator body 18, and secondly, an axial length L26 of the first bearing 26, measured along this axis of rotation X. And the second radial operating clearance J2 is formed between an outer annular surface 26f of the first bearing 26 and the annular surface 32f of the first housing canceled. As a non-limitative example, the first axial operating clearance J 1 is of the order of 0.1 to 0.4 millimeters, and the second radial operating clearance J 2 is order of 0.1 to 0.3 millimeters. The largest outer diameter of the first bearing 26 is smaller than the inner diameter of the first annular housing 32 of the stator body 18. Here, and as shown in Figure 5, the largest outer diameter portion of the first bearing 26 is located between the two shoulders 26c, 26d of the first bearing 26. The first bearing 26 is thus disposed within the first annular housing 32 so as to surround it peripherally in an axial direction and a radial direction. The stator body 18 thus comprises a first annular housing 32 inside which is inserted a first bearing 26, where the first bearing 26 has dimensions allowing it to be movable in the axial and radial directions inside the first annular housing 32. Here, the first annular housing 32 inside which is disposed the first bearing 26 is formed in one piece during the manufacture of the stator body 18. And the second stop 34 of the first annular housing 32 of the body stator 18 is produced during the manufacture of the stator body 18. In this embodiment, the first bearing 26 comprises a first face 26e cooperating with the first stop 33 of the first annular housing 32 of the stator body 18, and a second face 26a, opposite the first face 26e, cooperating with the second stop 34 of the first annular housing 32 of the stator body 18. Here, and as illustrated in FIG. 26e face 26e of the first bearing 26 is formed by the second shoulder 26d. And the second face 26a of the first bearing 26 is a front face at one end. An annular elastic seal 35 is disposed around the first bearing 26.
    [0025] The annular elastic seal 35 is compressed between the annular surface 32f of the first annular housing 32 of the stator body 18 and an outer annular surface 26g of the first bearing 26. Thus, the annular elastic seal 35 dampens the transmission of vibrations between the the rotor shaft 24 and the stator 14, as well as with an output shaft of the electric motor 12. In this way, the damping of the vibrations by means of the annular elastic seal 35 makes it possible to limit the wear of the elements constituting the electromechanical actuator 11 and to minimize the noise generated by vibrations at the concealment device 3 of the home automation system.
    [0026] In addition, the annular elastic seal 35 makes it possible to correct the alignment between the rotor shaft 24 and the stator body 18. In this way, the correction of the alignment of the rotor shaft 24 by means of the elastic seal annular 35 also limits the wear of the elements constituting the electromechanical actuator 11 and to minimize the noise generated by vibrations at the occulting device 3 of the home automation system. The annular elastic seal 35 mounted around the first bearing 26 makes it possible to form a ball-and-socket joint between the rotor shaft 24 and the first annular housing 32 of the stator body 18. Thus, the annular elastic seal 35 mounted around the first bearing 26 allows the rotor shaft 24 to be rotatable about an axis Y perpendicular to the axis of rotation X and intersecting therewith. Moreover, by mounting the first bearing 26 with the annular elastic seal 35 inside the first annular housing 32 and the insertion of the first end 24a of the rotor shaft 24 into the first bearing 26, the second Bearing 27 comprising a rolling member may be provided with an internal ring with a reduced internal operating clearance, the inner ring of the second bearing 27 cooperating with the second end 24b of the rotor shaft 24. Thus, the use of a second bearing 27 comprising an inner ring with a reduced inner operating clearance makes it possible to minimize the operating noise of the electric motor 12, during the rotational driving of the rotor 13 inside the stator 14, while avoiding vibrations related to at a displacement of the second end 24b of the rotor shaft 24 inside the second bearing 27. In addition, the use of a second bearing 27 comprising an inner ring with a reduced internal operating clearance reduces the cost of obtaining the electric motor 12. Here, the annular elastic seal 35 is an O-ring, and preferably made of elastomer, especially rubber. In one embodiment, the annular elastic seal 35 has a circular cross section.
    [0027] Of course, the shape of the section of the annular elastic seal 35 is in no way limiting, and may be different, and in particular oval or square. Here, and as illustrated in FIGS. 3 to 5, the annular elastic seal 35 mounted around the first bearing 26 is disposed between the first shoulder 26c of the first bearing 26 and the end end face 26a of the first bearing 26.
    [0028] Thus, the first shoulder 26c of the first bearing 26 limits the travel path of the annular elastic seal 35 along the first bearing 26 during the introduction of the first bearing 26 inside the first annular housing 32. In addition, the first shoulder 26c of the first bearing 26 forms a housing for retaining the annular elastic seal 35.
    [0029] In this way, the retaining housing of the annular elastic seal 35 formed in the first bearing 26 is made simply and inexpensively. Furthermore, the first shoulder 26c of the first bearing 26 makes it possible to avoid the withdrawal of the annular elastic seal 35, on the one hand linked to the axial operating clearance J1 of the first bearing 26 inside the first annular housing 32 of the body of stator 18, and secondly related to the radial operating clearance J2 of the first bearing 26 inside the first annular housing 32 of the stator body 18. Advantageously, the diameter of the cross section of the annular elastic seal 35 is greater than axial operating clearance J1 formed between the second face 26a of the first bearing 26 and the second stop 34 of the first annular housing 32 of the stator body 18 so as to avoid the withdrawal of the annular elastic seal 35 with respect to the first shoulder 26c of the first bearing 26. Practically, the part of the body of the first bearing 26 cooperating with the annular elastic seal 35 is smooth, and in particular of cylindrical shape. Advantageously, the annular elastic seal 35 is mounted around the first bearing 26 with a free fit. Thus, the assembly of the annular elastic seal 35 with the first bearing 26 does not cause stress on the annular elastic seal 35. In this way, the annular elastic seal 35 is compressed only between the annular surface 32f of the first annular housing 32 of the stator body 18 and the outer annular surface 26g of the first bearing 26 following the insertion of the assembly formed by the annular elastic seal 35 and the first bearing 26 in the first annular housing 32 of the stator body 18. Therefore, the elasticity of the annular elastic seal 35 is used in its entirety to limit the vibrations of the electric motor 12 during the rotary drive of the rotor shaft 24 and to correct the alignment of the rotor shaft 24 to the Inside the stator body 18. The first stop 33 of the first annular housing 32 of the stator body 18 is formed by plastic deformation of the stator body 18, following the introduction of the first bearing 26 inside the first annular housing 32 of the stator body 18.
    [0030] Thus, the first stop 33 of the first annular housing 32 of the stator body 18 is made simply, quickly and inexpensively. The introduction of a tool inside the body of the stator 18 makes it easy to form the first stop 33 following the introduction of the bearing 26 in the first annular housing 32 of the stator body 18.
    [0031] Here, the plastic deformation of the stator body 18 forming the first stop 33 of the first annular housing 32 of the stator body 18 is made in four deformation zones 40, preferably uniformly distributed around the axis of rotation X, as visible at Of course, the number of deformation zones of the stator body forming the first abutment of the first annular housing of the stator body is in no way limiting, and may be different, in particular at least three. The deformation zones 40 of the stator body 18 forming the first stop 33 of the first annular housing 32 of the stator body 18 are formed on the inner circumference of the stator body 18.
    [0032] Thus, the first face 26e of the first bearing 26 made by the second shoulder 26d can bear against the deformation zones 40 of the stator body 18 forming the first stop 33 of the first annular housing 32 of the stator body 18. Here, the zones deformation means 40 of the stator body 18 forming the first stop 33 of the first annular housing 32 of the stator body 18 are local deformation zones. Practically, the plastic deformation of the stator body 18 forming the first stop 33 of the first annular housing 32 of the stator body 18 corresponds to the formation of a plurality of material projections of the stator body 18, the projections exceeding the outer diameter of the stator body 18. first bearing 26 in the direction of the axis of rotation X, so as to decrease locally the diameter of the first annular housing 32 of the stator body 18. Thus, the projections constituting the first stop 33 of the first annular housing 32 of the stator body 18 prevent the first bearing 26 from being withdrawn from the first annular housing 32 of the stator body 18 in an axial direction. In addition, the plastic deformation of the stator body 18 forming the first stop 33 of the first annular housing 32 of the stator body 18 ensures that the annular elastic seal 35 is held on the first shoulder 26c of the first bearing 26. In this way, the annular elastic seal 35 is held in the retaining housing formed by the first shoulder 26c of the first bearing 26 although the first bearing 26 can move within the first annular housing 32 of the stator body 18 between the first and second stops 33, 34 in an axial direction. Advantageously, all the deformation zones 40 are produced at the same time.
    [0033] Thus, the plastic deformation of the stator body 18 is obtained by means of a tool locally crushing the material of the stator body 18 simultaneously at several deformation zones 40. Each deformation zone 40 is obtained by a punch respective. In this way, the first stop 33 of the first annular housing 32 of the stator body 18 is made simply, quickly and inexpensively.
    [0034] Preferably, the first stop 33 of the annular housing 32 of the stator body 18 cooperates with the second shoulder 26d of the first bearing 26. In a non-illustrated embodiment, a second annular elastic seal may be disposed between the first stop 33 of the first housing annular 32 of the stator body 18 and the second shoulder 26d of the first bearing 26. Thus, the addition of a second annular elastic seal around the first bearing 26, in particular between the first stop 33 of the first annular housing 32 of the body of stator 18 and the second shoulder 26d of the first bearing 26, improves the vibration damping between the first end 24a of the rotor shaft 24 and the stator 14. In such a case, the first stop 33 of the annular housing 32 of the stator body 18 can cooperate with the second end face 26b of the first bearing 26. Advantageously, the second stop 34 of the first annular housing 32 the stator body 18 is formed by an end wall of the first annular housing 32 of the stator body 18. Preferably, the first bearing 26 comprises at least one angular positioning element 37 cooperating with a notch 38 of the stator body 18. Thus, the first bearing 26 is locked in rotation relative to the stator body 18 so as not to be rotated with the rotor shaft 24.
    [0035] Here, and as shown in FIG. 6, the first bearing 26 comprises two angular positioning elements 37 cooperating respectively with a notch 38 of the stator body 18. A method of manufacturing a corresponding electromechanical actuator will now be described. to an embodiment of the invention.
    [0036] The manufacturing method comprises at least the following steps, preferably performed in the order mentioned: - insertion of the annular elastic seal 35 around the first bearing 26, - insertion of the first bearing 26 in the first annular housing 32 of the stator body 18 plastic deformation of the stator body 18, so as to create deformation zones 40 formed on the inner circumference of the stator body 18. The manufacturing method also comprises a step of inserting the rotor 13 inside the body of the stator 18. stator 18, where the first end 24a of the rotor shaft 24 is inserted in the first bearing 26.
    [0037] Then, the manufacturing method comprises a step of inserting the second bearing 27 in the second annular housing 36 of the support 39. Next, the manufacturing method comprises a step of inserting the second bearing 27 on the second end 24b of the 24. At the same time, the manufacturing method comprises a step of fixing the support 39 on the stator body 18, in particular by means of elastic snap-fastening elements. Thanks to the present invention, the electromechanical actuator 11 comprises an electric motor 12 provided with a stator 14 inside which is rotated a rotor 13, where the rotor comprises a rotor shaft 24 supported by a bearing 26, and wherein an annular resilient seal 35 is mounted between the bearing and the annular housing 32 receiving the bearing so as to limit the vibrations of the electric motor during the rotational driving of the rotor shaft and to correct the alignment of the rotor shaft within the stator body, while minimizing the manufacturing costs of the electric motor of an electromechanical actuator. Of course, many modifications can be made to the embodiments described above without departing from the scope of the invention. In particular, the second bearing can be a plain bearing.
    [0038] This second plain bearing can also be mounted around an annular elastic seal, as described above for the first bearing. In this embodiment, the mounting of the second bearing with an annular elastic seal in the second annular housing of the electric motor support also makes it possible to reduce the manufacturing cost of the electric motor, to dampen the transmission of vibrations between the second end of the the rotor shaft and the stator, and to correct the alignment between the second end of the rotor shaft and the stator body. In addition, in one embodiment, the rotor may comprise a hollow rotor shaft within which the stator core is disposed. The stator body includes a portion within the rotor shaft and another portion surrounding the outside of the rotor shaft. And the stator body comprises a first annular housing within which is disposed a first bearing. An annular elastic seal is disposed around the first bearing. The annular resilient seal is compressed between the annular surface of the annular housing of the stator body and an outer annular surface of the first bearing. The first abutment of the annular housing of the stator body is formed by plastic deformation of the stator body. The stator body is preferably made of plastic. And the rotor shaft includes an end disposed within the first bearing.
    权利要求:
    Claims (10)
    [0001]
    CLAIMS1- Electromechanical actuator (11) for a home automation closure or sun protection system comprising an electric motor (12), the electric motor (12) comprising a rotor (13) and a stator (14) coaxially positioned around an axis of rotation (X), wherein the rotor (13) comprises a rotor shaft (24), the rotor shaft (24) having an end (24a) supported by a bearing (26), where the stator (14) ) comprises a stator core (17) and a stator body (18), the stator body (18) comprising an annular housing (32) within which the bearing (26) is disposed, characterized in that the bearing (26) is mounted with a free fit inside the annular housing (32) of the stator body (18), the free adjustment being defined by: orn first axial operating clearance (J1), the first set of axial operation (J1) being realized by a difference between, on the one hand, an axial length (L32) measured along of the axis of rotation (X), between a first stop (33) and a second stop (34) of the annular housing (32) of the stator body (18) and, on the other hand, an axial length (L26) of the bearing (26), and a second radial operating clearance (J2), the second radial operating clearance (J2) being formed between an outer annular surface (26f) of the bearing (26) and the annular surface (32f) of the housing annular (32) of the stator body (18), in that an annular elastic seal (35) is arranged around the bearing (26), the annular elastic seal (35) being compressed between the annular surface (32f) of the housing annular (32) of the stator body (18) and an outer annular surface (26g) of the bearing (26), and in that the first abutment (33) of the annular housing (32) of the stator body (18) is formed by plastic deformation of the stator body (18).
    [0002]
    2- electromechanical actuator (11) for a home automation closure or sun protection system according to claim 1, characterized in that the body of the stator (18) is made of plastic material.
    [0003]
    3- electromechanical actuator (11) for a home automation closure or sun protection system according to claim 1 or claim 2, characterized in that the second stop (34) of the annular housing (32) of the stator body (18) is formed by an end wall of the annular housing (32) of the stator body (18).
    [0004]
    4- electromechanical actuator (11) for a home automation closure or sun protection system according to any one of claims 1 to 3, characterized in that the annular elastic seal (35) mounted around the bearing (26) is arranged between a shoulder (26c) of the bearing (26) and an end end face (26a) of the bearing (26).
    [0005]
    5- electromechanical actuator (11) for a home automation system for closing or sun protection according to any one of claims 1 to 4, characterized in that the first stop (33) of the annular housing (32) of the stator body (18 ) cooperates with a shoulder (26d) of the bearing (26).
    [0006]
    Electromechanical actuator (11) for a home automation closure or sun protection system according to any one of claims 1 to 5, characterized in that the rotor shaft (24) has another end (24b) supported by a another bearing (27), the other bearing (27) having a rolling member, and in that a support (39) comprises another annular housing (36) inside which the other bearing (27) is disposed. ), the support (39) being connected to the stator body (18).
    [0007]
    Electromechanical actuator (11) for a home-automation closure or sun protection system according to any one of claims 1 to 6, characterized in that the annular elastic seal (35) is mounted around the bearing (26) with an adjustment free.
    [0008]
    8-electromechanical actuator (11) for a home automation system for closing or sun protection according to any one of claims 1 to 7, characterized in that the bearing (26) comprises at least one angular positioning element (37) cooperating with a notch (38) of the stator body (18).
    [0009]
    9- Home automation system for closing or sun protection comprising a screen (2) windable on a winding tube (4) rotated by an electromechanical actuator (11), characterized in that the actuator (11) is in accordance with any of claims 1 to 8.
    [0010]
    10- A method of manufacturing an electromechanical actuator (11) for a home automation closure or sun protection system according to any one of claims 1 to 8, characterized in that said method comprises at least the following steps: - insertion of the annular elastic seal (35) around the bearing (26), - insertion of the bearing (26) in the annular housing (32) of the stator body (18), plastic deformation of the stator body (18) so as to create zones deformation (40) formed on the inner circumference of the stator body (18).
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    同族专利:
    公开号 | 公开日
    FR3018965B1|2016-03-25|
    EP2922183B1|2019-02-27|
    EP2922183A1|2015-09-23|
    PL2922183T3|2019-08-30|
    CN104935105B|2020-05-05|
    CN104935105A|2015-09-23|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE19630030A1|1996-07-25|1998-01-29|Becker Antriebe Gmbh|Retaining device for securing drive esp. electric motor or motor-gear-unit in tube e.g. for roller blinds or garage doors|
    EP1713159A1|2005-04-11|2006-10-18|Askoll Holding S.r.l.|Variable speed synchronous electric motor with rotor immersed in a fluid particularly for pumps|
    US20120098358A1|2010-10-21|2012-04-26|Baker Hughes Incorporated|Tuned Bearing|
    WO2013050722A1|2011-10-06|2013-04-11|Somfy Sas|Bowl for induction motor and induction motor equipped with said bowl|
    US20140054996A1|2012-08-21|2014-02-27|Stabilus Gmbh|Electric motor and motor/gear unit and variable-length drive means having such an electric motor|
    DE10253235A1|2002-11-15|2004-06-17|Festool Gmbh|electric motor|
    CN201884462U|2010-10-28|2011-06-29|比亚迪股份有限公司|Bearing mounting structure|
    DE102011075227A1|2011-05-04|2012-11-08|BSH Bosch und Siemens Hausgeräte GmbH|Thrust bearing for an electric drive|FR3049781B1|2016-04-04|2021-10-01|Somfy Sas|ELECTROMECHANICAL ACTUATOR FOR THE CONTROL OF SCREENS AND HOME AUTOMATION INSTALLATION INCLUDING SUCH AN ACTUATOR|
    FR3049783B1|2016-04-04|2021-10-01|Somfy Sas|ELECTROMECHANICAL ACTUATOR FOR THE CONTROL OF SCREENS, HOME AUTOMATION SYSTEM INCLUDING ONE SUCH ACTUATOR AND RANGE OF AT LEAST TWO SUCH ACTUATORS|
    DE102017216646A1|2017-09-20|2019-03-21|Bühler Motor GmbH|drive|
    FR3072118B1|2017-10-10|2019-11-08|Somfy Activites Sa|TUBULAR ELECTROMECHANICAL ACTUATOR AND DOMOTIC INSTALLATION COMPRISING SUCH ACTUATOR|
    FR3072117B1|2017-10-10|2019-11-08|Somfy Activites Sa|TUBULAR ELECTROMECHANICAL ACTUATOR, DOMOTIC INSTALLATION COMPRISING SUCH ACTUATOR AND METHOD OF ASSEMBLING SUCH ACTUATOR|
    法律状态:
    2015-03-02| PLFP| Fee payment|Year of fee payment: 2 |
    2016-03-03| PLFP| Fee payment|Year of fee payment: 3 |
    2017-03-20| PLFP| Fee payment|Year of fee payment: 4 |
    2018-03-13| PLFP| Fee payment|Year of fee payment: 5 |
    2019-03-13| PLFP| Fee payment|Year of fee payment: 6 |
    2020-12-18| ST| Notification of lapse|Effective date: 20201109 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1452319A|FR3018965B1|2014-03-20|2014-03-20|ELECTROMECHANICAL ACTUATOR, ASSOCIATED DOMOTIC INSTALLATION AND METHOD OF MANUFACTURING SUCH ACTUATOR|FR1452319A| FR3018965B1|2014-03-20|2014-03-20|ELECTROMECHANICAL ACTUATOR, ASSOCIATED DOMOTIC INSTALLATION AND METHOD OF MANUFACTURING SUCH ACTUATOR|
    EP15159791.1A| EP2922183B1|2014-03-20|2015-03-19|Electromechanical actuator, asociated domotic installation and manufacturing process of said actuator.|
    PL15159791T| PL2922183T3|2014-03-20|2015-03-19|Electromechanical actuator, asociated domotic installation and manufacturing process of said actuator.|
    CN201510121684.5A| CN104935105B|2014-03-20|2015-03-19|Electromechanical actuator, associated home automation device and manufacturing method of the actuator|
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