EP3325754B1 - Versatile gear motor for roller blinds and non-roller blinds - Google Patents

Description

1. a) un moteur rotatif; et
2. b) un arbre de sortie relié audit moteur rotatif afin de transmettre le couple délivré par le moteur rotatif audite arbre d'enroulement, l'arbre de sortie comportant une première prise pour recevoir un entraîneur de l'arbre d'enroulement d'un store enroulable.

The present invention relates to a motor assembly for a drive motor unit for a blind winding shaft, the assembly comprising:

1. a) a rotary motor; and
2. b) an output shaft connected to said rotary motor for transmitting the torque delivered by the rotary motor drives the winding shaft, the output shaft having a first engagement for receiving a drive of the winding shaft of a blind rollable.

A relevant set is known from the document EP 2 314 824 A1 or document DE 20 2011 105060 U1 .

However, this known assembly and the associated tubular motor are used exclusively for the motorization of roller blinds. They are therefore of limited use.

Therefore, an object of the invention is to provide a versatile motor assembly. This is particularly to obtain a motor assembly that can be used indifferently for the motorization of several types of blinds.

According to the invention, this object is achieved with an assembly as defined by claim 1, characterized in that the output shaft further comprises a second socket, distinct from the first socket, for securing to the shaft of winding of a non-rollable blind.

By providing a second grip on the output shaft, the motor assembly can be used not only to drive a roller blind but also to drive a roller blind, without the need to adapt said assembly.

• la deuxième prise est aménagée dans l'extrémité de l'arbre de sortie éloignée du moteur rotatif ;
• la deuxième prise comprend une cavité, de préférence à section polygonale, et notamment à section rectangulaire, de réception d'une extrémité de l'arbre d'enroulement d'un store non enroulable ;
• l'axe de la cavité est confondu à l'axe de rotation de l'arbre de sortie ;
• la cavité est un premier tronçon d'un trou, le trou comprenant, en allant de l'extérieur vers l'intérieur, ce premier tronçon suivi d'un second tronçon, de préférence tronconique, le second tronçon étant plus étroit que le premier tronçon ;
• la première prise comprend plusieurs, de préférence quatre, arêtes axiales sur lesquelles peut être supporté et immobilisé l'entraîneur en direction axiale, notamment par encliquetage ;
• une transmission, et notamment un réducteur, pour reprendre et adapter le couple délivré par le moteur rotatif, ladite transmission étant reliée par une extrémité audit moteur rotatif et par l'autre extrémité audit arbre de sortie ;
• un raccord interposé entre le moteur rotatif et la transmission et assurant la bonne reprise de couple entre le moteur rotatif et la transmission ;
• le raccord comporte au moins une échancrure apte à recevoir un élément de positionnement d'un boîtier accueillant l'ensemble moteur ;
• le raccord comporte un premier anneau côté moteur et un deuxième anneau côté transmission décalés axialement l'un par rapport à l'autre et de préférence reliés entre eux par deux ponts ;
• les deux anneaux délimitent entre eux la ou chaque échancrure ; et
• le deuxième anneau est muni d'au moins un plot de fixation du raccord à la transmission.

According to particular embodiments of the invention, the motor assembly comprises, one, several or all of the following characteristics, according to all the technically possible combinations:

• the second plug is arranged in the end of the output shaft remote from the rotary engine;
• the second socket comprises a cavity, preferably of polygonal section, and in particular rectangular section, receiving an end of the winding shaft of a non-rollable blind;
• the axis of the cavity coincides with the axis of rotation of the output shaft;
• the cavity is a first section of a hole, the hole comprising, going from the outside to the inside, this first section followed by a second section, preferably frustoconical, the second section being narrower than the first section; ;
• the first plug comprises several, preferably four, axial edges on which can be supported and immobilized the driver in the axial direction, in particular by snap-fastening;
• a transmission, and in particular a gearbox, for recovering and adapting the torque delivered by the rotary motor, said transmission being connected at one end to said rotary motor and at the other end to said output shaft;
• a coupling interposed between the rotary engine and the transmission and ensuring good torque recovery between the rotary engine and the transmission;
• the connection comprises at least one notch adapted to receive a positioning element of a housing accommodating the motor assembly;
• the coupling comprises a first ring on the motor side and a second ring on the transmission side axially offset with respect to each other and preferably interconnected by two bridges;
• the two rings delimit between them the or each indentation; and
• the second ring is provided with at least one attachment stud of the connection to the transmission.

The invention also relates to a power unit comprising a housing accommodating a motor assembly as defined above and a control unit of the motor assembly.

Preferably, the drive unit is a tubular actuator for roll-up blind or an actuator for roll-up blind.

• La figure 1 est une vue en perspective d'un ensemble moteur selon l'invention ;
• La figure 2 est une vue en perspective de l'arbre de sortie de l'ensemble moteur de la figure 1 ;
• La figure 3 est une vue en coupe longitudinale de l'arbre de sortie de la figure 2 ;
• La figure 4 est une vue en perspective du raccord de l'ensemble moteur de la figure 1 ;
• La figure 5 est une vue en coupe longitudinale du raccord de la figure 4 ;
• La figure 6 est une vue en coupe longitudinale de l'ensemble moteur de la figure 1, avec roue d'entraînement attachée ;
• La figure 7 est une vue de face de la roue d'entraînement selon la flèche VII de la figure 6 ;
• La figure 8 est une vue en perspective d'une unité motrice pour un store non enroulable comprenant l'ensemble moteur de la figure 1, la moitié supérieure du boîtier étant enlevée ; et
• La figure 9 est une vue en perspective d'une unité motrice pour un store enroulable comprenant l'ensemble moteur de la figure 1, la moitié supérieure du boîtier étant enlevée.

A preferred embodiment of the invention will now be described in detail with reference to the accompanying drawings, in which:

• The figure 1 is a perspective view of an engine assembly according to the invention;
• The figure 2 is a perspective view of the output shaft of the motor assembly of the figure 1 ;
• The figure 3 is a longitudinal sectional view of the output shaft of the figure 2 ;
• The figure 4 is a perspective view of the fitting of the motor assembly of the figure 1 ;
• The figure 5 is a longitudinal sectional view of the connection of the figure 4 ;
• The figure 6 is a longitudinal sectional view of the motor assembly of the figure 1 , with drive wheel attached;
• The figure 7 is a front view of the drive wheel according to arrow VII of the figure 6 ;
• The figure 8 is a perspective view of a power unit for a non-rollable blind comprising the motor assembly of the figure 1 the upper half of the case being removed; and
• The figure 9 is a perspective view of a power unit for a roller blind comprising the motor assembly of the figure 1 , the upper half of the case being removed.

The figure 1 shows a motor assembly 2. Such a motor assembly 2 is used for the motorization of window blinds, including window blinds for the interior. Thanks to the motor assembly 2, the awning can be raised or lowered by a simple command, without manual work.

The engine assembly 2 comprises four elements, namely a rotary electric motor 4, a transmission 8, a coupling 6 making the mechanical connection between the engine 4 and the transmission 8, and an output shaft 10 connected to the transmission 8.

The four elements lie along an X-X transmission axis. As indicated by the arrow F, the torque delivered by the electric motor 4 is transmitted towards the transmission axis XX to the output shaft 10 via the transmission 8. The electric motor 4 is therefore located at an upstream end 12 of the motor assembly 2. The output shaft 10 is located at a downstream end 14 of the motor assembly 2. The transmission axis XX is also the axis of rotation of the output shaft 10.

The coupling 6 is interposed between the rotary motor 4 and the transmission 8 and ensures good torque recovery between the rotary motor 4 and the transmission 8.

The transmission 8 is preferably a reducer. The gearbox 8 is connected by its first end on the motor side 7 through the coupling 6 to the electric motor 4, and by its second end on the output side 9 to the output shaft 10. The gearbox 8 serves to take up and adapt the torque delivered by the rotary motor 4. More specifically, it reduces the rotational speed delivered by the electric motor 4 at a rotational speed suitable for the operation of window blinds. Therefore, the motor assembly 2 can also be qualified geared motor. The reducer 8 is preferably an epicyclic type reducer.

The reducer 8 comprises an envelope 15 which houses its components. A cover 50, preferably of annular shape, is located at the second end 9 of the gearbox 8. The cover 50 is attached to the casing 8. The cover 50 surrounds the output shaft 10.

The first end 7 of the gearbox 8 is provided with elastic tabs 17 for fastening to the connector 6.

We are now interested in the output shaft 10. This is represented on a larger scale at figures 2 and 3 .

The output shaft 10 is preferably made by injection molding. In this case, its shapes are therefore dictated by constraints related to the manufacturing process. It is in particular to avoid masses of material or greater thicknesses than others which penalize the appearance and the mechanical strength of the output shaft 10. In particular, during the molding process, the formation of air bubbles may weaken the output shaft 10 and penalize its external appearance (deformations, cracks, ...). As a result, the thicknesses are chosen substantially constant and reinforcing walls forming spacers are retained to optimize the mechanical strength. The internal holes are made by pins placed before injection and removed during demolding.

The output shaft 10 is generally cylindrical in shape, and preferably in one piece. It has a first axial end 11 which, in operation, is close to the rotary motor 4, and a second axial end 13 which, in operation, is remote from the rotary motor 4. It comprises two juxtaposed sections, namely a recovery socket torque 16 and a driving head 18.

In the assembled state of the gearmotor 2, the torque recovery base 16 is inserted in the gearbox 8 in order to take back the torque. The driving head 18 then protrudes from the gearbox 8.

The base 16 comprises, along the axis XX, three sections, namely a gear section 20, followed by an abutment section 22, followed by a retaining section 24. In the assembled state of the geared motor 2 the gear section 20 meshes with the gearbox 8. The gear section 20 has two extensions 26. They are located on either side of the axis XX. They define between them a central hollow 28. This can possibly serve as a key. The gear section 20 allows the output shaft to be engaged with the output of the gearbox 8. In particular, the gear section 20 is in direct or indirect engagement with the planet carrier of the last stage. reducer. The two extensions 26 project from a common base 30. The base 30 has the shape of a disc having a wafer 32. This base 30 serves as a support for the extensions 26. Four recesses 34 are formed in the wafer 32 The recesses 34 are evenly distributed around the perimeter of the base 30. Each recess 34 has a section corresponding to a circular sector preferably describing an angle of about 90 °. This makes it possible to avoid material accumulations during injection molding, while retaining mechanical reinforcements between the recesses 34.

The abutment section 22 takes the form of a disc. This disk 22 has a diameter D which is greater than the diameter of the remainder of the output shaft 10. Thus, the disk 22 comprises a periphery 36 which protrudes radially from the rest of the output shaft 10. This disk 22 serves as a bearing with the cover 50 of the gearbox 8. The disk 22 optionally comprises planar zones 37 at the demolding lines, this to avoid closing a round on a round, which is often a source of burrs. The presence of flat areas 37 thus simplifies the manufacturing tools while ensuring the quality of the output shaft 10 produced.

The retaining section 24 comprises four radial partitions 38. These partitions 38 are regularly angularly spaced apart along the circumference of the retaining section 24, preferably at an angle of 90 °. The radial partitions 38 extend axially between the abutment section 22 and the drive head 18. The radial partitions 38 define recesses 40 between them. Each recess 40 has a section corresponding to a circular sector preferably describing an angle d about 90 °. This avoids accumulations of material during injection molding of the output shaft 10, while retaining mechanical reinforcements between the recesses 40. The retaining section 24 is itself closed by the cover 50 of the gearbox 8 .

The retaining section 24 makes it possible to link the base 16 and the drive head 18. It makes it possible to house the cover 50 for closing the casing 15 of the gearbox 8. The cover 50 bears on one end of the casing 15 of the gearbox 8 and on the surface of the disc 22 facing outwards (cf. figure 6 ).

The driving head 18 comprises a first plug 42 and a second plug 44. The first plug 42 is able to receive a driver of a winding shaft, in particular of a winding tube of a roller blind, in this case a drive wheel 45 (see figures 6 and 7 ).

The first plug 42 is generally cylindrical in shape, so as to be able to receive on its outer periphery the drive wheel 45. The first socket 42 comprises, in excess of a first cylinder 48, several edges 46, preferably four , forming on their outwardly facing surface a bearing surface for the drive wheel 45. The ridges 46 are evenly distributed along the periphery of the drive head 18. These edges 46 are otherwise suitable for immobilizing the drive wheel 45 in the axial direction. For this, each edge 46 is separated in its longitudinal direction by a recess 52 having a bottom 54.

The edges 46 extend from the second end 13 of the output shaft 10 to the cover 50 of the gearbox 8 (cf. figure 6 ). The arrangement of the ridges 46 on a cylindrical surface limits the amount of material to provide to create the first cylindrical socket 42 for supporting the drive wheel 45.

The second plug 44 is arranged in the second end 13 of the output shaft 10. The second plug 44 is part of a hole 58 (cf. figure 3 ) for receiving a winding shaft end of a non-rollable blind, such as a Venetian blind or pleated. For such a store said "not windable", the fabric or the blades forming the sunscreen does not roll up on itself. In contrast, laces or cords are wound on the winding shaft to raise a load bar located at the bottom end of the blind.

The receiving hole 58 extends axially along an axis O-O which coincides with the axis of rotation X-X. It is preferably a blind hole opening at the second axial end 13.

The receiving hole 58 comprises, going from the outside to the inside, a first section 60 in the form of a cavity, preferably of polygonal cross-section, and in particular of rectangular cross-section, followed by a second section 62 , the second section 62 being narrower than the first section 60. The second section 62 is preferably frustoconical and therefore preferably circular in cross section.

This is the first section 60 which is the second plug 44.

The cavity 60 has several, for example four, inner faces 61 interconnected by several, for example four, vertices 63 (see FIGS. figures 2 and 3 ).

It will be noted that the receiving hole 58 passes axially through the assembly of the drive head 18 and ends within the base 16. More specifically, the first section 60 extends only within the drive head. 18. The second frustoconical section 62 axially overlaps the drive head 18 and the base 16.

In addition, the driving head 18 is provided with two radial holes 56, which are arranged at some of the recesses 52 of the ridges 46. Preferably, two opposing recesses 52 are each provided with a radial hole 56 ( cf. figure 3 ) in the bottom 54 of these recesses. It will also be noted that the radial holes 56 open into the receiving hole 58.

The radial holes 56 are able to receive axial fastening screws of the winding shaft of a non-rollable blind.

Preferably, the edges 46 are aligned with the faces 61 of the first section 60. Alternatively, they could be aligned with the vertices 63 of the first section 60. The radial holes 56 would then be formed in the drive head 18 between two edges 46 through the cylinder 48.

We are now interested in fitting 6. This is represented on a larger scale at Figures 4 and 5 .

The connector 6 is preferably made by injection molding. In this case, its shapes are therefore dictated by constraints related to the manufacturing process. It is in particular to avoid masses of material or greater thicknesses than others which penalize the appearance and the mechanical strength of the connector 6. In particular, during the molding process, the formation of air bubbles risk of weakening the connection 6 and penalizing its external appearance (deformations, cracks, ...). As a result, the thicknesses are chosen substantially constant and reinforcing walls forming spacers are retained to optimize the mechanical strength. The internal holes are made by pins placed before injection and removed during demolding.

The connector 6 comprises a first motor-side ring 64 and a second transmission-side ring 66 axially offset with respect to each other and preferably interconnected by two axial bridges 68. The two rings 64, 66 delimit between them two notches 70.

The connector 6 further comprises two tabs 72 extending axially vis-a-vis. The tongues 72 project from the first ring 64 and are surrounded by the second ring 66. Each tongue 72 is radially connected inside the second ring 66 by a wall 74.

The first ring 64 is traversed at its center by a passing hole 76. The passing hole 76 is bordered by the two tabs 72. The first ring 64 also has two flanks 78 connection planes to the electric motor 4. It is also provided one or more lights 80 can accommodate a fastening device, such as a screw 82 (cf. figure 1 ), the electric motor 4.

In practice, the connector 6 is mounted on the electric motor 4, for example using two screws passing through the slots 80 and plugging into a housing of the electric motor 4. The lights 80 are accessible by the end transmission side of the connector 6, between the tabs 72.

The second ring 66 is provided on its outer face with one or more studs 84 for fastening to the gearbox 8. The studs 84 allow the resilient tabs 17 of the gearbox 8 to snap onto the outer face of the second ring 66.

Each stud 84 comprises in particular several inclined surfaces so that the snap-fastening of the elastic tabs 17 of the gearbox 8 can be carried out directly axially when the elastic tabs 17 and the pads 84 are aligned or by by means of a rotational displacement of the casing 15 of the gearbox 8 with respect to the second ring 66.

The figure 6 shows the details of the kinematic chain between the electric motor 4, the gearbox 8 and the output shaft 10.

The electric motor 4 comprises a motor shaft 71. This motor shaft 71 is itself provided with a connecting piece 73, the inner section of which is preferably in the form of a half-moon (circular inner shape provided with a flat part) . This shape cooperates with a half-moon shape of an input shaft 75 of the gearbox 8. For mounting the gearbox 8 on the connector 6, it is necessary to match, blindly, these two half-shaped parts. -Moon.

With reference to figures 6 and 7 , we will now describe the drive wheel 45 and its attachment to the output shaft 10.

The drive wheel 45 has an inner ring 81 which surrounds the axis of rotation X-X. The center of the ring 81 defines a passageway 79 through which the output shaft 10 can be inserted into the drive wheel.

The drive wheel 45 also comprises a sleeve 83 bordering the inner ring 81.

Several, preferably four, elastic tabs 85 are arranged on the inner ring 81. The resilient tabs 85 surround the central passage 79. They extend axially.

The sleeve 83 is provided on its outer surface with grooves 87 for attachment to a winding shaft of a roller blind.

As we see in figure 6 in the mounted state of the drive wheel 45, the first socket 42 receives on its outer periphery the inner ring 81. More specifically, the edges 46 form on their outwardly facing surface a bearing surface for the inner ring 81.

The elastic tabs 85 are snapped into the recesses 52. The cover 50 forms an axial stop for the drive wheel 45 plugged onto the output shaft 10.

If necessary, to enhance the axial retention of the drive wheel 45 on the output shaft 10, it can be blocked by a washer, which is held by means of a screw screwed into the second end 13 of the output shaft 10. The end of this screw is then housed in the second section 62 of the hole 58 of the output shaft 10.

To fix the drive wheel 45 in rotation with respect to a winding shaft of a blind, edges provided on the inside of the winding shaft are inserted in the grooves 87. The drive wheel 45 is fixed axially with respect to the winding shaft by means of a screw or a rivet, fixed radially through the winding shaft.

The Figures 8 and 9 show two variants according to the invention of a power unit 100, 200 integrating a copy of the motor assembly 2 according to the figure 1 . The motor unit 100 according to the figure 8 is an actuator for non-rollable awning, such as for example a Venetian blind or a pleated blind. The driving unit 200 is a tubular motor for roller blind.

The motors 100, 200 comprise a housing of which only one 102, 202 of the two housings is shown. The motor assembly 2 is positioned inside the housing 102, 202 with the aid of one or more positioning rods 86. These positioning rods 86 are received in the notches 70.

In the housing 102, 202, there is also a printed circuit 88 which is provided with an electronic control unit 90 of the motor assembly 2.

Claims (14)

1. A motor assembly (2) for a motor unit (100, 200) for driving a shaft for rolling a blind, the assembly (2) comprising:

   a) a rotary motor (4); and

   b) an output shaft (10) connected to said rotary motor (4) in order to transmit the torque supplied by the rotary motor (4) to said rolling shaft, the output shaft (10) comprising a first socket (42) for securing a roller blind to the winding shaft, the first socket being able to receive a drive member of the rolling shaft of a roller blind,

   characterized in that the output shaft (10) further includes a second socket (44), separate from the first socket (42), for securing a non-roller blind to the rolling shaft.
2. The assembly (2) according to claim 1, wherein the second socket (44) is arranged in the end (13) of the output shaft (10) separated from the rotary motor (4).
3. The assembly (2) according to claim 1 or 2, wherein the second socket (44) comprises a cavity (60), preferably with a polygonal section, and in particular a rectangular section, for receiving an end of the rolling shaft of a non-roller blind.
4. The assembly (2) according to claim 3, the axis (O-O) of the cavity (60) being combined with the rotation axis (X-X) of the output shaft (10).
5. The assembly (2) according to claim 3 or 4, wherein the cavity (60) is a first segment of a hole (58), the hole (58) comprising, from the outside toward the inside, this first segment (60) followed by a second segment (62), preferably frustoconical, the second segment being narrower than the first segment.
6. The assembly (2) according to any one of the preceding claims, wherein the first socket (42) comprises several, preferably four, axial edges on which the drive member (46) can be supported and immobilized in the axial direction, in particular by snapping.
7. The assembly (2) according to any one of the preceding claims, further comprising a transmission (8), and in particular a reducing gear, to react and adapt the torque delivered by the rotary motor (4), said transmission (8) being connected by one end (7) to said rotary motor (4) and by the other end (9) to said output shaft (10).
8. The assembly (2) according to claim 7, further comprising a coupling (6) inserted between the rotary motor (4) and the transmission (8) and ensuring the proper torque take-up between the rotary motor and the transmission.
9. The assembly (2) according to claim 8, wherein the coupling (6) includes at least one indentation (70) able to receive a positioning element (86) for a casing accommodating the motor assembly (2).
10. The assembly (2) according to claim 8 or 9, wherein the coupling (6) includes a first ring (64) on the motor side and a second ring (66) on the transmission side that are axially offset relative to one another and preferably connected to one another by two bridges (68).
11. The assembly (2) according to claims 9 and 10, wherein the two rings (64, 66) delimit the or each indentation (70) between them.
12. The assembly (2) according to claim 10 or 11, wherein the second ring (66) is provided with at least one stud (84) for fastening the coupling (6) to the transmission (8).
13. A motor unit (100, 200) comprising a casing (102, 202) accommodating a motor assembly (2) according to any one of the preceding claims as well as a control unit (90) for the motor assembly.
14. The motor unit (100, 200) according to claim 13, the motor unit being a tubular actuator (200) for a roller blind or an actuator (100) for a non-roller blind.

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