FR2875258A1 - CONNECTING DEVICE BETWEEN A DRIVE MOTOR AND A SCREW MANEUVER SHAFT FOR CLOSURE OR SOLAR PROTECTION INSTALLATION OF THE BUILDING, AND CORRESPONDING INSTALLATION - Google Patents

Abstract

This connecting member, which comprises a first portion (10) for securing with the motor (4) and a second portion (142) for securing with the operating shaft (2), comprises at least one connecting element (14). elongated shape, adapted to flex in the manner of a beam, secured to both the first and second securing portions (10, 142).

Description

The present invention relates to a connecting member between an engine

  drive and a shaft for operating a screen for closing or solar protection system of the building, as well as a closing device

  or solar protection of the building comprising at least one such connecting member.

  Closure installation or solar protection of the building means doors, gates, shutters and equivalent equipment. In this type of installation, it is known to maneuvrer, by means of a tree, a closing screen or sun protection, a generic term used here to designate in particular an apron, a door, a shutter or a grille.

  The aforementioned operating shaft is mechanically connected to a drive motor, via a connecting member. The invention more particularly relates to a damping type connection existing between this drive motor and this operating shaft.

  DE-A-19 736 770 discloses a connecting member allowing such damping. For this purpose, this member, which has a wheel shape, firstly comprises a central hub in which is formed a recess for receiving a drive shaft of the motor. Furthermore, there is provided a peripheral ring, which is integral with the operating shaft, disposed outside of this ring.

  This hub and this ring, which form respective connecting portions with the motor and the operating shaft, are kinematically connected by means of an elastomeric material interposed between the facing walls of these two elements. There is thus a possibility of displacement, of the damped type, between the hub and the ring of the connecting member and, consequently, between the motor and the operating shaft, according to a rotation about the main axis of these latter. Furthermore, radial ribs, which are provided both the hub and the ring, form stops for the damping material, to limit the rotational movement mentioned above.

  This damping connection member makes it possible in particular to limit the noise of the maneuver involved in driving the drive shaft by the motor. It also allows preservation of the entire installation. In this way, the latter is likely to have a relatively small overall mass, while maintaining a satisfactory life.

  This known connecting member however has certain disadvantages, particularly related to the complexity of its implementation, as well as its implementation.

  Under these conditions, the invention aims to provide a binding member improving the prior art mentioned above.

  It aims in particular to provide such a connecting member which is inexpensive, easy to produce and easy to implement.

  It also aims to provide such a connecting member which is composed of a small number of constituent elements and which can be modular, namely to lend itself to easy adaptation to different pairs of maneuver.

  For this purpose, it relates to a connecting member between a drive motor and a screen maneuvering shaft for closing installation or solar protection of the building, this connecting member comprising a first portion of solidarity with the motor and a second securing portion with the operating shaft, characterized in that said connecting member comprises at least one elongated connecting element, able to flex in the manner of a beam, integral with both first and second securing portions.

  According to other characteristics of the invention: the or each connecting element is made in one piece at a time with the first securing portion and with the second securing portion; the first and second securing portions, as well as the or each connecting element are made of a plastic material, in particular polyacetal; this connecting member generally has a wheel shape, the first and second securing portions being placed respectively in the center and at the periphery of this connecting member, while several connecting elements extending radially between the two elements are provided. these two portions of solidarity; - The connecting member is adapted to rotate about a main axis, the first and second 20 securing portions being arranged one behind the other along said main axis, while the or each connecting element s extends axially between these two securing portions; the or each connecting element is hollow; one end of the or each connecting element forms the first or the second securing portion of the connecting member; - There is provided means for limiting the bending movements of the or each connecting element; the limiting means comprise at least one rigid abutment element, provided in the vicinity of the or each flexible connecting element; - There are provided stiffening means of the or each connecting element; The stiffening means are removable; - The stiffening means comprise at least one damping element, in particular a buffer made of elastomeric material, interposed between facing faces of a connecting element and a corresponding stop element; - The stiffening means comprise at least one spring blade, adapted to be secured to the or each connecting element.

  The invention also relates to a closure system or solar protection of the building, comprising a closing screen or sun protection, a shaft of maneuvre of this screen, a drive motor of this shaft, as well as the less a connecting member ensuring the kinematic transmission between the engine and the shaft, characterized in that the or each connecting member is as defined above.

  The invention will be better understood and other advantages thereof will appear more clearly in the light of the following description of three embodiments of a connecting member according to its principle, given solely as examples. non-limiting and with reference to the accompanying drawings, in which: - Figure 1 is a perspective view, illustrating a connecting member according to the invention belonging to a closure or solar protection system; FIG. 2 is a front view, illustrating an alternative embodiment of the connecting member according to the invention; FIG. 3 is a front view, schematically illustrating the principle of another variant embodiment of the invention; and FIG. 4 is a perspective view schematically illustrating the principle of a further variant embodiment of the invention.

  The closure or sun protection system, partially illustrated in FIG. 1, comprises, first of all, in a known manner, a tubular shaft 2, shown in phantom. This tree conventionally provides the maneuver, including winding, a closure screen or sun protection that is not shown in this figure.

  This operating shaft 2 is driven by means of a geared motor, of which only the drive shaft 4 is illustrated in this FIG. 1, where it is also shown in phantom. The transmission to the operating shaft 2 of the movement imparted by the axis 4 is ensured by means of a connecting member, designated as a whole by the reference 6.

  Viewed from the front, this connecting member has a generally circular shape. It is noted at its main axis which corresponds to the axis 4 of the engine.

  The connecting member 6 has a solid bottom 8, disc-shaped, from which extends a central hub 10, hollowed with an opening 12 for receiving the axis 4. The fastening between the walls of this 12 and the axis 4 is made in a manner known per se, for example by the presence of grooves 101 which is provided with the hub 10.

  Three beam-like connecting members 14 extend radially from the hub 10, forming two by two an angle of about 120. It should be noted that each beam 14 is hollow, namely that it is not bonded to the bottom 8, and that it is further devoid of upper wall. In other words, each beam 14 is recessed in the axial direction, and is not bonded to the bottom 8. Such an arrangement gives a flexible character to each beam, as will be seen in what follows.

  The outer radial end 142 of each beam is hollowed out with an orifice 16, intended for the passage of a screw, not shown, ensuring the attachment of the assembly of the connecting member 6 to the winding shaft 2. In addition, the internal volume of each beam defines a housing 18 for receiving a nut also not shown, adapted to cooperate with the aforementioned fixing screw. Alternatively, the connection between the shaft 2 and the beams 14 can be provided by means of housings, formed in the shaft, in which are received the free ends of the various beams.

  Two adjacent beams are separated by a respective abutment member 20, which is provided with the bottom 8, as well as a reinforcing rib 201. Each abutment member 20 also has side walls 202 extending in the vicinity of the walls. lateral to an adjacent beam 14, generally parallel thereto.

  It will be noted that the conformation of the abutment elements gives them a substantially rigid character, as opposed to the beams 14.

  Finally, damping means are interposed between the lateral walls opposite a corresponding beam and abutment element. In the example considered, such means are formed by buffers 22, made of an elastomeric material, which are received in recesses 143, formed in the side walls 141 of each beam 14. Nevertheless, such damping means can have a different structure, as will be seen in particular with reference to the second embodiment.

  It should be emphasized that the hub 10, the beams 14 and the stop elements 20 are made in one piece. They are preferably molded, and are made of a plastic material, which is especially polyacetal. It will therefore be noted that only the buffers 22 constitute reported elements.

  In use, the hub 10 forms the connecting portion of the member 6 with the axis 4 of the motor, while the outer radial end 142 of each beam 14 forms the connecting portion with the operating shaft 2. During commissioning of the engine, the assembly of the connecting member 6 is rotated about the axis 4.

  In particular, thanks to their perforated structure, the beams 14 have a flexible nature. They are therefore adapted to flex in a global pivoting movement about this axis 4, materialized by the double arrow f. This therefore confers a possibility of movement between the respectively inner and outer radial ends of each beam 14 and, consequently, between the drive motor and the winding shaft.

  It should be noted that such a movement is limited, because of the interposition of the buffers 22 between the walls opposite the beams 14 and the abutment elements 20. Thus, depending on the hardness of these buffers 22, which contribute to stiffen the beams, the intensity imparted to this damping may be higher or lower.

  However, such damping can occur even in the absence of buffers 22, given the very nature of the material constituting the flexible beams 14.

  Figure 2 illustrates an alternative embodiment of the invention. In this figure, the mechanical elements similar to those described and shown in Figure 1 are assigned the same reference numbers, increased by 100.

  The connecting member 106 has a peripheral ring 110, screwed onto the shaft 102. Three beams 114, similar to those 14 described above, extend radially inwards from this peripheral ring 110.

  The inner radial end 1142 of each beam 114 is fixed on the axis 104 of the engine, by any appropriate means. By way of non-limiting example, this fixing is provided by screwing or by cooperation of shapes.

  The ring gear 110 has three radially inwardly extending projections which define three stop members 120 provided between two adjacent beams 114. Two pairs of buffers 122, similar to those 22 described above, are interposed between the facing walls of the beams and these abutment elements.

  Alternatively, one of the beams defines, in its interior volume, notches 124 for the receipt of spring blades 126. The latter are intended to stiffen the beam considered, namely to limit its bending movement.

  In use, the connecting portion of the member 106 with the shaft 102 is formed, either by the outer radial end 142 of each beam, but by the peripheral ring 110. In addition, the connecting portion with the motor 104 is formed, either by the hub 10 of the previous example, but by the inner radial end 1142 of each beam 114.

  The overall operation of the closure or sun protection system, equipped with the connecting member 106, is generally similar to that described with reference to the first embodiment. Thus, when driving the shaft 102 by the motor 104, the presence of the flexible beams 114 allows a rotational movement, with a damping component, between this motor and this operating shaft.

  The invention is also applicable to the connection between a motor and a maneuver shaft which are capable of moving in a different motion of a rotation. This is illustrated in Figure 3, where the mechanical elements similar to those described and shown in Figure 1 are assigned the same reference numbers, increased by 200.

  There is thus a motor 204 and a maneuvering shaft 202, shown in part, which are capable of moving in a translation materialized by the double arrow (F). The connecting member 206 firstly has a portion 210, in the form of a strip, which secures the motor 204.

  Furthermore, a flexible beam 214 extends, from the securing portion 210, towards the operating shaft 202. The free end 2142 of this beam 214 is secured to the operating shaft 202 by any appropriate means.

  In addition, two abutment elements 220 extend from the belt 210 towards the operating shaft 202. However, it should be noted that, unlike the beam 214, these abutment elements 220 are not integral with this shaft 202. Finally, elastomeric buffers 222 are interposed between the side walls facing the beam 214 and the abutment elements 220.

  In use, when transmitting motion between the motor 204 and the shaft 202, the elongated beam 214 is adapted to flex horizontally, ie transversely to its vertical main axis.

  This therefore allows a displacement in translation, with a damping component, between the motor and the operating shaft. In addition, the presence of the abutment elements 220 makes it possible to limit the deflection of this beam 214, while the elastomeric buffers 222 ensure the stiffening of the latter.

  FIG. 4 illustrates a further variant embodiment of the invention. In this FIG. 4, the mechanical elements similar to those described and shown in FIG. 1 are assigned the same reference numbers, increased by 300.

  There is thus a motor 304 and a maneuvering shaft 302, pivotable about an axis A '.

  The connecting member 306 has generally a cylinder shape, the main axis coincides with that A 'of the motor and the shaft.

  This connecting member 306 firstly has a portion 310, disc-shaped, ensuring the connection with the motor 304, by any appropriate means. Three flexible beams 314 extend, from this securing portion 310, towards the operating shaft 302. The free ends 3142 of these beams 314 are secured to this operating shaft 302 by any appropriate means, especially by screwing.

  In addition, abutment members 320 extend from disk 310 in the direction of operating shaft 302. Viewed from the front, these abutment members 320 have a circular arc shape. Finally, elastomeric buffers 322, only two of which are shown, are interposed between the side walls opposite each beam 314 and a corresponding abutment element 320.

  In use, during the transmission of movement between the motor 304 and the shaft 302, the elongate beams 314 are adapted to flex, so as to provide a cushioned travel in rotation between the motor and the shaft.

  However, it should be noted that, contrary to the embodiment of FIG. 1, the beams 314 do not extend radially, but axially. Under these conditions, the respective securing portions of the connecting member with this shaft and this motor are placed one behind the other, along the main axis A 'of the connecting member 306.

  The invention is not limited to the examples described and shown.

  Thus, it can be provided that the beams 14 or 114 are reported, respectively on the hub 10 or the ring 110. In this case, the value of the torque that can be transmitted by the wheel can be adapted according to the mechanical characteristics of each game of beams.

  The invention makes it possible to achieve the objectives mentioned above.

  Indeed, the use of flexible elements, capable of being made of a material similar to that of the rest of the connecting member, makes it possible to dispense with the manufacture of a reported damping material. This is therefore advantageous in terms of the cost of producing the link assembly. In particular, thanks to the invention, substantially all of the connecting member can be manufactured in one piece.

  In addition, the presence of stiffening means of the beam, which are in particular buffers or spring blades, gives a great modularity to the connecting member of the invention. Indeed, it is possible to vary the mechanical characteristics of these stiffening means, so as to have a wide range of products, each of which is adapted to a specific power of the engine.

Claims (2)

12 CLAIMS   1. Connecting member (6; 106; 206; 306) between a drive motor (4; 104; 204; 304) and a drive shaft (2; 102; 202; 302) of an installation screen. closure or solar protection of the building, this connecting member comprising a first portion (10; 1142; 210; 310) for securing with the motor and a second portion (142; 110; 2142; 3142) for securing with the shaft characterized in that said connecting member (6; 106; 206; 306) comprises at least one connecting element (14; 114; 214; 314) of elongated shape which is adapted to flex in the manner of a beam, secured to both the first and second securing portions (10, 142; 110, 1142; 210, 2142; 310, 3142).   2. Connecting member according to claim 1, characterized in that the or each connecting element (14; 114; 214; 314) is made in one piece at a time with the first securing portion (10; 1142; 210; 310) and with the second securing portion (142; 110; 2142; 3142). 3. Connecting member according to claim 2, characterized in that the first and second securing portions (10, 142; 110, 1142) and the or each connecting element (14; 114) are made of a plastic material. , in particular polyacetal.   4. Connecting member according to any one of the preceding claims, characterized in that this connecting member (6; 106) generally has a wheel shape, the first and second securing portions (10, 142; 110, 1142). being placed respectively at the center and at the periphery of this connecting member, while there are provided a plurality of connecting elements (14; 114) extending radially between these two securing portions.   5. Connecting member according to any one of claims 1 to 3, characterized in that the connecting member (306) is adapted to rotate about a main axis (A '), the first (310) and second (3142) securing portions being arranged one behind the other along said main axis, while the or each connecting element (314) extends axially between these two securing portions.   6. Connecting member according to any one of the preceding claims, characterized in that the or each connecting element (14; 114) is hollow.   7. Connection member according to any one of the preceding claims, characterized in that one end (142; 1142; 2142; 3142) of the or each connecting element (14; 114; 214; 314) forms the first or second securing portion of the connecting member.   8. Connecting member according to any one of the preceding claims, characterized in that there is provided means (20, 120; 220; 320) for limiting the bending movements of the or each connecting element (14; 114; 214; 314).   9. Connecting member according to claim 8, characterized in that the limiting means comprise at least one rigid abutment element (20; 120; 220; 320) provided in the vicinity of the or each flexible connecting element (14; 114; 214; 314).   10. Connecting member according to any one of the preceding claims, characterized in that means (22; 122; 126; 222; 322) for stiffening the or each connecting element (14; 114; 214) are provided. 314).   11. A connecting member according to claim 10, characterized in that the stiffening means (22; 122; 126; 222; 322) are removable.   12. Connecting member according to claim 9, taken in combination with claim 10 or 11, characterized in that the stiffening means comprise at least one damping element, in particular a buffer (22; 122; 222; elastomeric material interposed between facing faces of a connecting member (14; 114; 214; 314) and a corresponding stop member (20; 120; 220; 320).   13. Connecting member according to any one of claims 10 to 12, characterized in that the stiffening means comprise at least one spring blade (126), adapted to be secured to the or each connecting element (114).   14. Closure or solar protection system of the building, comprising a closing or sun protection screen, a control shaft (2; 102; 202; 302) of this screen, a motor (4; 104; 204; 304). ) of this shaft, and at least one connecting member (6; 106; 206; 306) ensuring the kinematic transmission between this motor and this shaft, characterized in that the or each connecting member (6; 106; 206; 306) is according to any one of the preceding claims.