WO2023165951A1 - Movement transmission device for an aircraft - Google Patents

Movement transmission device for an aircraft Download PDF

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Publication number
WO2023165951A1
WO2023165951A1 PCT/EP2023/054909 EP2023054909W WO2023165951A1 WO 2023165951 A1 WO2023165951 A1 WO 2023165951A1 EP 2023054909 W EP2023054909 W EP 2023054909W WO 2023165951 A1 WO2023165951 A1 WO 2023165951A1
Authority
WO
WIPO (PCT)
Prior art keywords
transmission
transmission device
transmission shaft
section
fixing
Prior art date
Application number
PCT/EP2023/054909
Other languages
French (fr)
Inventor
Didier VALEMBOIS
Guy Valembois
Etienne Breton
Original Assignee
Conseil Et Technique
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Conseil Et Technique filed Critical Conseil Et Technique
Publication of WO2023165951A1 publication Critical patent/WO2023165951A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/02—Shafts; Axles
    • F16C3/026—Shafts made of fibre reinforced resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C13/00—Control systems or transmitting systems for actuating flying-control surfaces, lift-increasing flaps, air brakes, or spoilers
    • B64C13/24—Transmitting means
    • B64C13/26—Transmitting means without power amplification or where power amplification is irrelevant
    • B64C13/28—Transmitting means without power amplification or where power amplification is irrelevant mechanical
    • B64C13/30—Transmitting means without power amplification or where power amplification is irrelevant mechanical using cable, chain, or rod mechanisms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
    • F16D1/0847—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to a radial screw
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
    • F16D1/0852—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping between the mating surfaces of the hub and shaft
    • F16D1/0864—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping between the mating surfaces of the hub and shaft due to tangential loading of the hub, e.g. a split hub
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
    • F16D2001/102—Quick-acting couplings in which the parts are connected by simply bringing them together axially the torque is transmitted via polygon shaped connections

Definitions

  • the present invention relates to the field of motion transmission devices, and more particularly to the field of transmission devices comprising a transmission shaft and one or more transmission elements arranged on one shaft.
  • Such transmission devices are generally used for the actuation, that is to say the opening, closing, locking and/or unlocking of a mechanical control device of an aircraft such as a door, valve, bevel or flight control of an aircraft such as an airplane.
  • the transmission elements arranged on the shaft may consist of bearings often produced by the presence of bearings, lever arms making it possible to transform the rotation of the shaft into circular movement of the end of the levers, pinions, cams or any other type of transmission elements.
  • the transmission shafts of such known transmission devices are mostly guided in rotation and serve to transmit movements via the transmission elements, also called accessories.
  • the transmission shafts of such known transmission devices are for the most part metallic and of tubular shape, the accessories or transmission elements are generally secured by a cylindrical adjustment associated with a radial pin allowing rotational locking around a longitudinal axis. of the transmission shaft and relative translation in a direction parallel to the longitudinal axis.
  • a double pinning makes it possible most of the time to ensure a redundancy of the fixing.
  • Such a transmission device is for example known from document EP 0 743 240 B1.
  • Such a known transmission device has the following drawbacks in particular: the presence of the pins requires a radial drilling of the transmission shaft, which reduces the resistant section of the transmission shaft by the same amount while presenting an accident of shape suitable for concentrating the stresses in this zone during the solicitation of the tree ; the transmission, mechanical actions taking place via the pins concentrates the efforts of the pins on the driveshaft in the area already the most loaded by the torsion of the driveshaft; this concentration of the problems of resistance in the pinning zones of the transmission shaft leads to an oversizing of the mechanical parts and therefore to a mass of the assembly of the transmission device mounted which is not optimal.
  • One way of avoiding or reducing the scale of these drawbacks could consist in transmitting the mechanical actions via splines or in producing integral shafts on which the accessories are formed in one piece by machining or by 3D metal printing by example .
  • transmission devices intended to be butted to the free end of a hollow shaft, the connection being made by inserting a part of the transmission device into said shaft, while there is matching of the external profile. of said part with the inner profile of said free end.
  • These devices also have the drawback of difficult or impossible detachment or replacement of the accessories.
  • the present invention relates to a motion transmission device for an actuating and/or opening and/or closing and/or locking and/or unlocking mechanism of a mechanical motion control device.
  • a mechanical motion control device such as a door, a valve, a bevel or a flight control of an aircraft.
  • the transmission device comprises a transmission shaft extending along a longitudinal axis.
  • the transmission shaft comprises at least one attachment section.
  • the transmission device further comprises a transmission element fixed to the fixing section.
  • the attachment section is of non-circular cross-section in a plane orthogonal to the longitudinal axis and comprises at least one attachment surface.
  • the transmission element further comprises a complementary fixing surface conforming to the fixing surface.
  • the transmission shaft is made of a composite material, preferably a composite material comprising carbon fibers while the transmission element is made of a metallic material, preferably aluminum, and it comprises a fitting part, fitted onto said fixing section while at least one tightening screw makes it possible to tighten the fitting part against the fixing section.
  • the fixing surface and the complementary fixing surface are essentially planar and each extend in a plane parallel to the longitudinal axis.
  • the fastening section comprises, in a plane orthogonal to the longitudinal axis, a cross section of essentially polygonal shape, preferably of the shape of an equilateral and/or equiangular polygon.
  • the transmission shaft is a tubular element.
  • This characteristic also makes it possible to obtain a transmission device which is light and sufficiently rigid.
  • the transmission element comprises a pin forming a mechanical obstacle to movement of the transmission element along the transmission shaft parallel to the longitudinal axis.
  • the transmission element and/or the transmission shaft each comprise a hole in which the pin is received, the hole of the transmission element being preferably arranged in the part of the fitting and/or the drilling of the transmission shaft preferably being arranged in the fixing surface.
  • the transmission device further comprises an adhesive connecting the transmission element to the fixing section.
  • the invention also relates to an aircraft, preferably an aircraft comprising a transmission device according to the invention.
  • - Figure 1 is a schematic representation of a transmission shaft of a transmission device according to a first preferred embodiment of the invention
  • - Figure 2 is a schematic representation of a mold for manufacturing the transmission shaft of the transmission device according to the first preferred embodiment of the invention
  • FIG. 3 is a sectional view of the mold for manufacturing the drive shaft of the transmission device according to the first preferred embodiment of the invention
  • FIG. 4 is a schematic representation of a transmission element of a transmission device according to the first preferred embodiment of the invention.
  • FIG. 5 is a schematic representation of the transmission device according to the first preferred embodiment of the invention.
  • FIG. 6 is a sectional view of the transmission device according to the first preferred embodiment of the invention
  • Figure 7 is a sectional view of the transmission device according to the first preferred embodiment of the invention
  • FIG. 8 is a schematic representation of the transmission element of the transmission device according to the first preferred embodiment of the invention
  • Figure 9 is a perspective view of the transmission device according to the first preferred embodiment of the invention ' invention
  • FIG. 10 is a sectional view of the transmission device according to the first preferred embodiment of the invention.
  • FIG. 11 is a sectional view of the transmission device according to the first preferred embodiment of the invention.
  • - Figure 12 is a perspective view of a retaining plate of the transmission element of the transmission device according to the first preferred embodiment of the invention
  • - Figure 13 is a schematic representation of a variant of the transmission element of a transmission device according to the preferred embodiment of the invention
  • FIG. 14 is a sectional view of the transmission device according to a second preferred embodiment of one invention.
  • the subject of the present application is a motion transmission device 10 for an actuating and/or opening and/or closing and/or locking and/or unlocking mechanism of a mechanical motion control device such as as a door, a valve, a bevel or a flight control of an aircraft.
  • the present application also relates to an aircraft comprising a mechanism for actuating and/or opening and/or closing and/or locking and/or unlocking a mechanical movement control device such as a door. , a valve , a bevel gear or a flight control provided with such a motion transmission device 10 .
  • the movement transmission device 10 comprises a transmission shaft 20 extending along a longitudinal axis A.
  • the transmission shaft 20 comprises at least one attachment section 22 .
  • the movement transmission device 10 further comprises a transmission element 40 fixed to the fixing section 22 .
  • the attachment section 22 is of non-circular cross-section in a plane orthogonal to the longitudinal axis A and comprises an attachment surface 24 .
  • the transmission element 40 comprises a complementary fixing surface 42 matching the fixing surface 24 .
  • the fixing surface 24 as well as the complementary fixing surface 42 marrying the fixing surface 24 prevent a relative rotation around the longitudinal axis A between the transmission element 40 and the transmission shaft 20 .
  • the transmission element 40 is held on the fixing section 22 by form conjugation.
  • the fixing surface 24 and the complementary fixing surface 42 can be essentially planar. and each extend in a plane parallel to the longitudinal axis A.
  • the fixing surface 24 and the complementary fixing surface 42 can be of curvilinear shape, preferably having a cross section in a plane orthogonal to the longitudinal axis A in the shape of an arc of a circle, the center of which is distant from the longitudinal axis A, that is to say whose center is not coincident with the longitudinal axis A.
  • the transmission elements 40 can consist of bearings often produced by the presence of bearings, lever arms making it possible to transform the rotation of the transmission shaft 20 into circular movement of the end of the levers, pinions, cams or any other type of transmission elements.
  • Figure 11 discloses a motion transmission device 10 provided with a transmission element 40 made in the form of a bearing.
  • the transmission elements 40 can be adapted for fixing sections 22 arranged on a central part 23 of the transmission shaft 20 or can be adapted for fixing sections 22 arranged on an end part 25 of the transmission shaft.
  • the transmission elements 40 intended to be fixed to fixing sections 22 arranged on the end part 25 of the transmission shaft 20 may have a bearing surface 43 which can bear against an end face 27 of the transmission shaft 20 present on the end part 25 of the transmission shaft 20.
  • the bearing surface 43 and the end face 27 thus form a bearing preventing movement of the transmission element 40 on the transmission shaft 20 along the longitudinal axis A.
  • Figure 13 discloses such a transmission element 40 intended to be fixed to a fixing section 22 arranged on the end part 25 of the transmission shaft 20.
  • the transmission shaft 20 is made of a composite material, preferably a composite material comprising carbon fibers.
  • the transmission element 40 is made of a metallic material, preferably aluminum.
  • the fastening section 22 may comprise, in a plane orthogonal to the longitudinal axis A, a cross section of essentially polygonal shape, preferably of the shape of an equilateral and/or equiangular polygon.
  • the attachment section 22 may comprise a section in the shape of an equilateral and equiangular hexagon.
  • the attachment section 22 may have a cross-section in the shape of an ellipse.
  • the transmission shaft 20 may be a tubular element provided with a hollow 21 .
  • the hollow 21 may comprise, in a plane orthogonal to the longitudinal axis A, a cross section of essentially polygonal shape, preferably of the shape of an equilateral and/or equiangular polygon.
  • the recess 21 may have the shape of the same polygon as the fixing section 22 takes.
  • the hollow 21 may comprise, in a plane orthogonal to the longitudinal axis A, a cross-section of essentially round shape.
  • the transmission shaft 20 and/or the recess 21 may/may comprise a constant section over their entire length in a plane orthogonal to the longitudinal axis A.
  • a single attachment section 22 continues over the entire length of the transmission shaft 20 or a series of several consecutive fixing sections 22 along the length of the transmission shaft 20 may/may be formed.
  • the transmission element 40 may comprise a fitting part 44 fitted onto the fixing section 22 and a tightening screw 46 making it possible to tighten the fitting part 44 against the fixing section 22 .
  • the complementary fixing surface 42 can be provided on the fitting part 44 . This assembly makes it possible to prestress the fitting part 44 to fix the transmission element 40 to the fixing section 22 by friction between the fixing surface 24 and the complementary fixing surface 42.
  • the fitting part 44 may have a plurality of complementary fixing surfaces 42, preferably not parallel to one another.
  • the number of complementary fixing surfaces 42 is preferably equal to the number of flat fixing surfaces 24 provided on the fixing section 22 of the transmission shaft 20.
  • the fitting part 44 can in cross section have the shape of the same polygon taken by the attachment section 22.
  • Driveshaft 20 may have edge fillets on its outer surface to limit areas of potential stress concentration on driveshaft 20.
  • the transmission element 40 may comprise a pin 48 forming a mechanical obstacle to movement of the transmission element 40 along the transmission shaft 20 parallel to the longitudinal axis A.
  • the transmission element 40 and/or the transmission shaft 20 may/may each comprise a bore 50, 26 in which the pin 48 is received, the bore 50 of the transmission element 40 preferably being arranged in the fitting part 44 and/or the bore 26 of the transmission shaft 20 preferably being arranged in the fixing surface 24.
  • the pin 48 can be maintained in the bores 50, 26 using a retaining plate 54.
  • the retaining plate 54 can be provided with an opening receiving the pin 48.
  • the retaining plate 54 can be fixed to the transmission element 40, preferably to the fitting part 44 of the transmission element 40 using a fixing screw 56 screwed into a tapped hole 58 of the transmission element 40.
  • the movement transmission device 10 may also comprise an adhesive 60 connecting the transmission element 40 to the fixing section 22.
  • the transmission element 40 can comprise a hole 52 for the injection of the adhesive 60 .
  • the hole 52 can emerge in the complementary fixing surface 42 .
  • the hole 52 can be arranged in the fitting part 44 .
  • the fixing section 22 of polygonal shape allows a multiplication of the stress zones in the transmission shaft 20 , which promotes the progressiveness of the local loading between the transmission shaft 20 and the transmission element 40 .
  • the polar inertia of cross-section of the fixing section 22 corresponds to the accumulation of the polar inertias of the transmission shaft 20 and of the transmission element 40 .
  • the torsional stiffness of the attachment section 22 is greater and the shear stress due to torsion is lower.
  • the cross-section inertias are accumulated in the same way and therefore have the same beneficial effect.
  • This property makes it possible to envisage a pinning in the fixing surface 42 , preferably in a central part of the fixing surface 42 , without the pinning generating overstresses, the tightening of the transmission element 40 reinforces this central part of the fixing surface 42 .
  • This pinning in no way reduces the performance of the transmission device 10 unlike a conventional transmission device where it represents the weak point of the device.
  • the motion transmission device 10 can be manufactured using a manufacturing method comprising the following successive steps: providing a preform of a transmission shaft 20 and providing a transmission element 40 comprising an essentially planar complementary fixing surface 42; arrangement of the transmission element 40 relative to the preform so as to position the complementary fixing surface 42 opposite a part of the preform intended to form a fixing section 22; inserting the arrangement of the transmission element 40 and the preform into a mold 100; and injection of a die into the mold 100 to form the transmission shaft 20 comprising an attachment section 22 provided with an essentially planar attachment surface 24 which mates with the complementary attachment surface 42 of the transmission element 40 .
  • the motion transmission device 10 can be manufactured using a manufacturing method comprising the following successive steps: providing a preform of a transmission shaft 20; inserting the preform into a mold 100; injection of a die into the mold 100 to form the transmission shaft 20 comprising an attachment section 22 provided with an essentially planar attachment surface 24; and fitting of a fitting part 44 of a transmission element 40 so that a complementary fixing surface 42 of the transmission element element 40 matches the fixing surface 24 of the transmission shaft 20 .
  • the transmission shaft 20 can be manufactured by pultrusion, in particular in the case where the transmission shaft 20 has a constant section over its entire length.
  • the manufacturing method may include the tightening of a tightening screw 46 in order to tighten the fitting part 44 against the fixing section 22 .
  • Tightening part fitting 44 against the fixing section 22 can advantageously make use of a deformability of the transmission element 40.
  • the manufacturing method may include applying an adhesive 60 between the transmission element 40 and the attachment section 22 to connect the transmission element 40 to the attachment section 22.
  • the application of the adhesive 60 may be effected by injecting adhesive 60 into hole 52.
  • the mold 100 can comprise two mold parts 110, 120.
  • the transmission shaft 20 can be molded in a female mold 100, polymerized under internal pressure via a inflatable bladder 130.
  • This embodiment makes it possible to guarantee a high quality of the external surface of the transmission shaft 20, which makes it possible to obtain at least one fixing surface 24 necessary for fixing the transmission element 40 precisely .
  • the process for manufacturing the motion transmission device 10 according to the present application may comprise a molding process corresponding to the molding process defined by the patent application FR3109746A1.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Mechanically-Actuated Valves (AREA)

Abstract

The invention relates to a movement transmission device (10) for a mechanism for actuating and/or opening and/or closing and/or locking and/or unlocking a door or a flap of a mechanical movement control device of an aircraft, the device (10) comprising a transmission shaft (20) extending along a longitudinal axis (A). The transmission shaft (20) comprises at least one fastening segment (22). The movement transmission device (10) further comprises a transmission element (40) fastened to the fastening segment (22). The fastening segment (22) has a cross section that is a non-circular in a plane orthogonal to the longitudinal axis (A) and comprises at least one fastening surface (24). The transmission element (40) comprises a complementary fastening surface (42) that corresponds to the planar fastening surface (24). The transmission shaft (20) is made of a composite material and the transmission element (40) is made of a metal material.

Description

Titre : Dispositif de transmission de mouvement pour un aéronef Title: Motion transmission device for an aircraft
La présente invention concerne le domaine des dispositifs de transmission de mouvement , et tout particulièrement le domaine des dispositifs de transmission comprenant un arbre de transmission et un ou plusieurs éléments de transmission agencés sur 1 ' arbre . The present invention relates to the field of motion transmission devices, and more particularly to the field of transmission devices comprising a transmission shaft and one or more transmission elements arranged on one shaft.
De tels dispositifs de transmission sont en général employés pour 1 ' actionnement , c' est-à-dire l' ouverture, la fermeture, le verrouillage et/ou le déverrouillage d' un dispositif de commande mécanique d' un aéronef tel qu' une porte, un clapet , un renvoi d' angle ou une commande de vol d' un aéronef tel qu' un avion . Such transmission devices are generally used for the actuation, that is to say the opening, closing, locking and/or unlocking of a mechanical control device of an aircraft such as a door, valve, bevel or flight control of an aircraft such as an airplane.
Les éléments de transmission agencés sur l' arbre peuvent consister en des paliers souvent réalisés par la présence de roulements , des bras de leviers permettant de transformer la rotation de l ' arbre en mouvement circulaire de l ' extrémité des leviers , des pignons , des cames ou tout autre type d' éléments de transmission . The transmission elements arranged on the shaft may consist of bearings often produced by the presence of bearings, lever arms making it possible to transform the rotation of the shaft into circular movement of the end of the levers, pinions, cams or any other type of transmission elements.
Les arbres de transmission de tels dispositifs de transmission connus sont pour la plupart guidés en rotation et servent à transmettre des mouvements via les éléments de transmission, aussi appelés accessoires . The transmission shafts of such known transmission devices are mostly guided in rotation and serve to transmit movements via the transmission elements, also called accessories.
Les arbres de transmission de tels dispositifs de transmission connus sont pour la plupart métalliques et de forme tubulaires , les accessoires ou éléments de transmission sont en général solidarisés par un ajustement cylindrique associé à un goupillage radial permettant le blocage en rotation autour d' un axe longitudinal de l ' arbre de transmission et translation relative en direction parallèle à l' axe longitudinal . Un double goupillage permet la plupart du temps d' assurer une redondance de la fixation . Un tel dispositif de transmission est par exemple connu du document EP 0 743 240 B1 . The transmission shafts of such known transmission devices are for the most part metallic and of tubular shape, the accessories or transmission elements are generally secured by a cylindrical adjustment associated with a radial pin allowing rotational locking around a longitudinal axis. of the transmission shaft and relative translation in a direction parallel to the longitudinal axis. A double pinning makes it possible most of the time to ensure a redundancy of the fixing. Such a transmission device is for example known from document EP 0 743 240 B1.
Un tel dispositif de transmission connu présente notamment les inconvénients suivants : la présence des goupilles demande un perçage radial de l ' arbre de transmission, ce qui réduit d' autant la section résistante de l ' arbre de transmission tout en présentant un accident de forme propre à concentrer des contraintes dans cette zone lors de la sollicitation de l ' arbre ; la transmission, des actions mécaniques se faisant via les goupilles concentre les efforts des goupilles sur l ' arbre de transmission dans la zone déjà la plus chargée par la torsion de l' arbre de transmission ; cette concentration des problématiques de résistance dans les zones de goupillage de l ' arbre de transmission conduit à un surdimensionnement des pièces mécaniques et donc à une masse de l ' ensemble du dispositif de transmission monté non optimale .Such a known transmission device has the following drawbacks in particular: the presence of the pins requires a radial drilling of the transmission shaft, which reduces the resistant section of the transmission shaft by the same amount while presenting an accident of shape suitable for concentrating the stresses in this zone during the solicitation of the tree ; the transmission, mechanical actions taking place via the pins concentrates the efforts of the pins on the driveshaft in the area already the most loaded by the torsion of the driveshaft; this concentration of the problems of resistance in the pinning zones of the transmission shaft leads to an oversizing of the mechanical parts and therefore to a mass of the assembly of the transmission device mounted which is not optimal.
Une manière d' éviter ou de réduire l' ampleur ces inconvénients pourrait consister en une transmission des actions mécaniques via des cannelures ou en une réalisation des arbres intégraux sur lesquels les accessoires sont formés d' une seule pièce par usinage ou par impression métallique 3D par exemple . One way of avoiding or reducing the scale of these drawbacks could consist in transmitting the mechanical actions via splines or in producing integral shafts on which the accessories are formed in one piece by machining or by 3D metal printing by example .
Cette solution présente néanmoins le désavantage de rendre un détachement ou un remplacement des accessoires difficile ou impossible . This solution nevertheless has the disadvantage of making detachment or replacement of the accessories difficult or impossible.
On connaît également des dispositifs de transmission destinés à être aboutés à l' extrémité libre d' un arbre creux, la liaison étant réalisée par introduction d' une partie du dispositif de transmission dans ledit arbre, tandis qu' il y a concordance du profil extérieur de ladite partie avec le profil intérieur de ladite extrémité libre . Ces dispositifs présentent également l' inconvénient d' un détachement ou d' un remplacement des accessoires difficile ou impossible . Also known are transmission devices intended to be butted to the free end of a hollow shaft, the connection being made by inserting a part of the transmission device into said shaft, while there is matching of the external profile. of said part with the inner profile of said free end. These devices also have the drawback of difficult or impossible detachment or replacement of the accessories.
Il est un objet de la présente demande de proposer un dispositif de transmission permettant un détachement ou un remplacement aisé des éléments de transmission ou accessoires . Il est en outre un objet de la présente demande de proposer un dispositif de transmission léger en poids , peu onéreux en production et évitant des zones de concentration de contraintes mécaniques dans un arbre de transmission du dispositif de transmission . It is an object of the present application to propose a transmission device allowing easy detachment or replacement of the transmission elements or accessories. It is further an object of this application to provide a transmission device light in weight , inexpensive in production and avoiding zones of concentration of mechanical stresses in a transmission shaft of the transmission device .
A cet effet , la présente invention concerne un dispositif de transmission de mouvement pour un mécanisme d' actionnement et/ou d' ouverture et/ou de fermeture et/ou de verrouillage et/ou de déverrouillage d' un dispositif de commande mécanique de mouvement tel qu' une porte, un clapet , un renvoi d' angle ou une commande de vol d' un aéronef . Le dispositif de transmission comprend un arbre de transmission s ' étendant le long d' un axe longitudinal . L' arbre de transmission comporte au moins un tronçon de fixation . Le dispositif de transmission comprend en outre un élément de transmission fixé au tronçon de fixation . Le tronçon de fixation est de section transversale non-circulaire dans un plan orthogonal à l' axe longitudinal et comprend au moins une surface de fixation . L' élément de transmission comporte en outre une surface de fixation complémentaire épousant la surface de fixation . Selon l' invention, l ' arbre de transmission est fabriqué en un matériau composite , de préférence en un matériau composite comprenant des fibres de carbone tandis que l' élément de transmission est fabriqué en un matériau métallique , de préférence en aluminium, et il comprend une partie d' emmanchement , emmanchée sur ledit tronçon de fixation tandis qu' au moins une vis de serrage permet de serrer la partie d' emmanchement contre le tronçon de fixation . To this end, the present invention relates to a motion transmission device for an actuating and/or opening and/or closing and/or locking and/or unlocking mechanism of a mechanical motion control device. such as a door, a valve, a bevel or a flight control of an aircraft. The transmission device comprises a transmission shaft extending along a longitudinal axis. The transmission shaft comprises at least one attachment section. The transmission device further comprises a transmission element fixed to the fixing section. The attachment section is of non-circular cross-section in a plane orthogonal to the longitudinal axis and comprises at least one attachment surface. The transmission element further comprises a complementary fixing surface conforming to the fixing surface. According to the invention, the transmission shaft is made of a composite material, preferably a composite material comprising carbon fibers while the transmission element is made of a metallic material, preferably aluminum, and it comprises a fitting part, fitted onto said fixing section while at least one tightening screw makes it possible to tighten the fitting part against the fixing section.
L' utilisation d' un matériau composite permet d' obtenir un dispositif de transmission qui est de poids réduit et suffisamment rigide . The use of a composite material makes it possible to obtain a transmission device which is light and sufficiently rigid.
Selon une possibilité , la surface de fixation et la surface de fixation complémentaire sont essentiellement planes et s ' étendent chacune dans un plan parallèle à l ' axe longitudinal . According to one possibility, the fixing surface and the complementary fixing surface are essentially planar and each extend in a plane parallel to the longitudinal axis.
Conformément à une variante de réalisation préférentielle , le tronçon de fixation comporte dans un plan orthogonal à l ' axe longitudinal une section transversale de forme essentiellement polygonale, de préférence de forme d' un polygone équilatéral et/ou équiangulaire . Ces caractéristiques permettent un raccordement facile et rigide entre l'élément de transmission et l'arbre de transmission. According to a preferred embodiment variant, the fastening section comprises, in a plane orthogonal to the longitudinal axis, a cross section of essentially polygonal shape, preferably of the shape of an equilateral and/or equiangular polygon. These characteristics allow an easy and rigid connection between the transmission element and the transmission shaft.
Selon une caractéristique additionnelle possible, l'arbre de transmission est un élément tubulaire. According to a possible additional characteristic, the transmission shaft is a tubular element.
Cette caractéristique permet également d' obtenir un dispositif de transmission qui est de poids réduit et suffisamment rigide . This characteristic also makes it possible to obtain a transmission device which is light and sufficiently rigid.
Selon une possibilité, l'élément de transmission comprend une goupille formant un obstacle mécanique à un déplacement de l'élément de transmission le long de l'arbre de transmission en parallèle à l'axe longitudinal. According to one possibility, the transmission element comprises a pin forming a mechanical obstacle to movement of the transmission element along the transmission shaft parallel to the longitudinal axis.
Conformément à une variante de réalisation préférentielle, l'élément de transmission et/ou l'arbre de transmission comportent chacun un perçage dans lequel/lesquels est reçu la goupille, le perçage de l'élément de transmission étant de préférence aménagé dans la partie d'emmanchement et/ou le perçage de l'arbre de transmission étant de préférence aménagé dans la surface de fixation . According to a preferred embodiment variant, the transmission element and/or the transmission shaft each comprise a hole in which the pin is received, the hole of the transmission element being preferably arranged in the part of the fitting and/or the drilling of the transmission shaft preferably being arranged in the fixing surface.
Ces caractéristiques permettent de bloquer l'élément de transmission à l'encontre d'un mouvement de translation de l'élément de transmission le long de l'axe longitudinal de l'arbre de transmission. These characteristics make it possible to block the transmission element against a translational movement of the transmission element along the longitudinal axis of the transmission shaft.
Selon une caractéristique additionnelle possible, le dispositif de transmission comporte en outre un adhésif reliant l'élément de transmission au tronçon de fixation. According to a possible additional feature, the transmission device further comprises an adhesive connecting the transmission element to the fixing section.
L'invention a également pour objet un aéronef, de préférence un avion comprenant un dispositif de transmission selon 1' invention . The invention also relates to an aircraft, preferably an aircraft comprising a transmission device according to the invention.
L'invention sera mieux comprise, grâce à la description ci- après, qui se rapporte à deux modes de réalisation préférés, donnés à titre d'exemple non limitatif, et expliqués avec référence aux dessins schématiques annexés, dans lesquels : The invention will be better understood, thanks to the description below, which relates to two preferred embodiments, given by way of non-limiting example, and explained with reference to the appended diagrammatic drawings, in which:
- la figure 1 est une représentation schématique d'un arbre de transmission d'un dispositif de transmission selon un premier mode de réalisation préféré de l'invention ; - la figure 2 est une représentation schématique d' un moule permettant la fabrication de l' arbre de transmission du dispositif de transmission selon le premier mode de réalisation préféré de l' invention ; - Figure 1 is a schematic representation of a transmission shaft of a transmission device according to a first preferred embodiment of the invention; - Figure 2 is a schematic representation of a mold for manufacturing the transmission shaft of the transmission device according to the first preferred embodiment of the invention;
- la figure 3 est une vue en coupe du moule permettant la fabrication de l' arbre de transmission du dispositif de transmission selon le premier mode de réalisation préféré de l' invention ; - Figure 3 is a sectional view of the mold for manufacturing the drive shaft of the transmission device according to the first preferred embodiment of the invention;
- la figure 4 est une représentation schématique d' un élément de transmission d' un dispositif de transmission selon le premier mode de réalisation préféré de l' invention ; - Figure 4 is a schematic representation of a transmission element of a transmission device according to the first preferred embodiment of the invention;
- la figure 5 est une représentation schématique du dispositif de transmission selon le premier mode de réalisation préféré de l' invention ; - Figure 5 is a schematic representation of the transmission device according to the first preferred embodiment of the invention;
- la figure 6 est une vue en coupe du dispositif de transmission selon le premier mode de réalisation préféré de l' invention la figure 7 est une vue en coupe du dispositif de transmission selon le premier mode de réalisation préféré de l' invention ; - Figure 6 is a sectional view of the transmission device according to the first preferred embodiment of the invention; Figure 7 is a sectional view of the transmission device according to the first preferred embodiment of the invention;
- la figure 8 est une représentation schématique de l ' élément de transmission du dispositif de transmission selon le premier mode de réalisation préféré de l ' invention la figure 9 est une vue en perspective du dispositif de transmission selon le premier mode de réalisation préféré de l' invention ; - Figure 8 is a schematic representation of the transmission element of the transmission device according to the first preferred embodiment of the invention Figure 9 is a perspective view of the transmission device according to the first preferred embodiment of the invention ' invention;
- la figure 10 est une vue en coupe du dispositif de transmission selon le premier mode de réalisation préféré de l' invention ; - Figure 10 is a sectional view of the transmission device according to the first preferred embodiment of the invention;
- la figure 11 est une vue en coupe du dispositif de transmission selon le premier mode de réalisation préféré de l' invention ; - Figure 11 is a sectional view of the transmission device according to the first preferred embodiment of the invention;
- la figure 12 est une vue en perspective d' une tôle de maintien de l ' élément de transmission du dispositif de transmission selon le premier mode de réalisation préféré de l' invention ; - la figure 13 est une représentation schématique d' une variante de l ' élément de transmission d' un dispositif de transmission selon le mode de réalisation préféré de l' invention ; - Figure 12 is a perspective view of a retaining plate of the transmission element of the transmission device according to the first preferred embodiment of the invention; - Figure 13 is a schematic representation of a variant of the transmission element of a transmission device according to the preferred embodiment of the invention;
- la figure 14 est une vue en coupe du dispositif de transmission selon un deuxième mode de réalisation préféré de 1' invention . - Figure 14 is a sectional view of the transmission device according to a second preferred embodiment of one invention.
La présente demande a pour objet un dispositif de transmission de mouvement 10 pour un mécanisme d' actionnement et/ou d' ouverture et/ou de fermeture et/ou de verrouillage et/ou de déverrouillage d' un dispositif de commande mécanique de mouvement tel qu' une porte , un clapet , un renvoi d' angle ou une commande de vol d' un aéronef . La présente demande a également pour objet un aéronef comportant un mécanisme d' actionnement et/ou d' ouverture et/ou de fermeture et/ou de verrouillage et/ou de déverrouillage d' un dispositif de commande mécanique de mouvement tel qu' une porte , un clapet , un renvoi d' angle ou une commande de vol pourvu d' un tel dispositif de transmission de mouvement 10 . Le dispositif de transmission de mouvement 10 comprend un arbre de transmission 20 s ' étendant le long d' un axe longitudinal A. L' arbre de transmission 20 comporte au moins un tronçon de fixation 22 . Le dispositif de transmission de mouvement 10 comprend en outre un élément de transmission 40 fixé au tronçon de fixation 22 . Le tronçon de fixation 22 est de section transversale non-circulaire dans un plan orthogonal à 1 ' axe longitudinal A et comprend une surface de fixation 24 . L' élément de transmission 40 comporte une surface de fixation complémentaire 42 épousant la surface de fixation 24 . The subject of the present application is a motion transmission device 10 for an actuating and/or opening and/or closing and/or locking and/or unlocking mechanism of a mechanical motion control device such as as a door, a valve, a bevel or a flight control of an aircraft. The present application also relates to an aircraft comprising a mechanism for actuating and/or opening and/or closing and/or locking and/or unlocking a mechanical movement control device such as a door. , a valve , a bevel gear or a flight control provided with such a motion transmission device 10 . The movement transmission device 10 comprises a transmission shaft 20 extending along a longitudinal axis A. The transmission shaft 20 comprises at least one attachment section 22 . The movement transmission device 10 further comprises a transmission element 40 fixed to the fixing section 22 . The attachment section 22 is of non-circular cross-section in a plane orthogonal to the longitudinal axis A and comprises an attachment surface 24 . The transmission element 40 comprises a complementary fixing surface 42 matching the fixing surface 24 .
La surface de fixation 24 ainsi que la surface de fixation complémentaire 42 épousant la surface de fixation 24 empêchent une rotation relative autour de l ' axe longitudinal A entre l' élément de transmission 40 et l ' arbre de transmission 20 . L' élément de transmission 40 est maintenu sur le tronçon de fixation 22 par conjugaison de forme . The fixing surface 24 as well as the complementary fixing surface 42 marrying the fixing surface 24 prevent a relative rotation around the longitudinal axis A between the transmission element 40 and the transmission shaft 20 . The transmission element 40 is held on the fixing section 22 by form conjugation.
Selon une possibilité , la surface de fixation 24 et la surface de fixation complémentaire 42 peuvent être essentiellement planes et chacune s'étendre dans un plan parallèle à l'axe longitudinal A. According to one possibility, the fixing surface 24 and the complementary fixing surface 42 can be essentially planar. and each extend in a plane parallel to the longitudinal axis A.
De façon alternative, la surface de fixation 24 et la surface de fixation complémentaire 42 peuvent être de forme curviligne, de préférence présentant une section transversale dans un plan orthogonal à l'axe longitudinal A de forme d'un arc de cercle, dont le centre est distant de l'axe longitudinal A, c'est-à-dire dont le centre est non confondu avec l'axe longitudinal A. Alternatively, the fixing surface 24 and the complementary fixing surface 42 can be of curvilinear shape, preferably having a cross section in a plane orthogonal to the longitudinal axis A in the shape of an arc of a circle, the center of which is distant from the longitudinal axis A, that is to say whose center is not coincident with the longitudinal axis A.
Les éléments de transmission 40 peuvent consister en des paliers souvent réalisés par la présence de roulements, des bras de leviers permettant de transformer la rotation de l'arbre de transmission 20 en mouvement circulaire de l'extrémité des leviers, des pignons, des cames ou tout autre type d'éléments de transmission. La figure 11 divulgue un dispositif de transmission de mouvement 10 pourvu d'un élément de transmission 40 réalisé sous la forme d'un roulement. The transmission elements 40 can consist of bearings often produced by the presence of bearings, lever arms making it possible to transform the rotation of the transmission shaft 20 into circular movement of the end of the levers, pinions, cams or any other type of transmission elements. Figure 11 discloses a motion transmission device 10 provided with a transmission element 40 made in the form of a bearing.
Les éléments de transmission 40 peuvent être adaptés pour des tronçons de fixation 22 agencés sur une partie centrale 23 de l'arbre de transmission 20 ou peuvent être adaptés pour des tronçons de fixation 22 agencés sur une partie d'extrémité 25 de l'arbre de transmission 20. Les éléments de transmission 40 destinés à être fixés à des tronçons de fixation 22 agencés sur la partie d'extrémité 25 de l'arbre de transmission 20 peuvent présenter une surface d'appui 43 pouvant s'appuyer contre une face terminale 27 de l'arbre de transmission 20 présente sur la partie d'extrémité 25 de l'arbre de transmission 20. La surface d'appui 43 et la face terminale 27 forment ainsi un palier empêchant un déplacement de l'élément de transmission 40 sur l'arbre de transmission 20 le long de l'axe longitudinal A. La figure 13 divulgue un tel élément de transmission 40 destiné à être fixé à un tronçon de fixation 22 agencé sur la partie d' extrémité 25 de l'arbre de transmission 20. The transmission elements 40 can be adapted for fixing sections 22 arranged on a central part 23 of the transmission shaft 20 or can be adapted for fixing sections 22 arranged on an end part 25 of the transmission shaft. transmission 20. The transmission elements 40 intended to be fixed to fixing sections 22 arranged on the end part 25 of the transmission shaft 20 may have a bearing surface 43 which can bear against an end face 27 of the transmission shaft 20 present on the end part 25 of the transmission shaft 20. The bearing surface 43 and the end face 27 thus form a bearing preventing movement of the transmission element 40 on the transmission shaft 20 along the longitudinal axis A. Figure 13 discloses such a transmission element 40 intended to be fixed to a fixing section 22 arranged on the end part 25 of the transmission shaft 20.
L'arbre de transmission 20 est fabriqué en un matériau composite, de préférence en un matériau composite comprenant des fibres de carbone . L' élément de transmission 40 est fabriqué en un matériau métallique, de préférence en aluminium. The transmission shaft 20 is made of a composite material, preferably a composite material comprising carbon fibers. The transmission element 40 is made of a metallic material, preferably aluminum.
Le tronçon de fixation 22 peut comporter dans un plan orthogonal à l' axe longitudinal A une section transversale de forme essentiellement polygonale, de préférence de forme d' un polygone équilatéral et/ou équiangulaire . The fastening section 22 may comprise, in a plane orthogonal to the longitudinal axis A, a cross section of essentially polygonal shape, preferably of the shape of an equilateral and/or equiangular polygon.
Dans le premier mode de réalisation préféré de l' invention, comme divulgué dans les figures 1 à 3 , 5 à 7 et 9 à 11 par exemple, le tronçon de fixation 22 peut comporter une section de forme d' un hexagone équilatéral et équiangulaire . In the first preferred embodiment of the invention, as disclosed in Figures 1 to 3, 5 to 7 and 9 to 11 for example, the attachment section 22 may comprise a section in the shape of an equilateral and equiangular hexagon.
Dans le deuxième mode de réalisation préféré de l ' invention, comme divulgué dans la figure 13 , le tronçon de fixation 22 peut présenter une section de forme d' une ellipse . In the second preferred embodiment of the invention, as disclosed in Figure 13, the attachment section 22 may have a cross-section in the shape of an ellipse.
L' arbre de transmission 20 peut être un élément tubulaire pourvu d' un creux 21 . Le creux 21 peut comporter dans un plan orthogonal à l' axe longitudinal A une section transversale de forme essentiellement polygonale, de préférence de forme d' un polygone équilatéral et/ou équiangulaire . Selon une variante préférée de l ' invention, le creux 21 peut comporter la forme du même polygone que prend le tronçon de fixation 22 . The transmission shaft 20 may be a tubular element provided with a hollow 21 . The hollow 21 may comprise, in a plane orthogonal to the longitudinal axis A, a cross section of essentially polygonal shape, preferably of the shape of an equilateral and/or equiangular polygon. According to a preferred variant of the invention, the recess 21 may have the shape of the same polygon as the fixing section 22 takes.
Selon une alternative , le creux 21 peut comporter dans un plan orthogonal à l' axe longitudinal A une section transversale de forme essentiellement ronde . According to an alternative, the hollow 21 may comprise, in a plane orthogonal to the longitudinal axis A, a cross-section of essentially round shape.
L' arbre de transmission 20 et/ou le creux 21 peut/peuvent comporter une section constante sur toute leur longueur dans un plan orthogonal à l' axe longitudinal A. Dans ce cas , un seul tronçon de fixation 22 continu sur toute la longueur de l' arbre de transmission 20 ou une série de plusieurs tronçons de fixation 22 consécutifs sur la longueur de l ' arbre de transmission 20 peut/peuvent être formé (s) . The transmission shaft 20 and/or the recess 21 may/may comprise a constant section over their entire length in a plane orthogonal to the longitudinal axis A. In this case, a single attachment section 22 continues over the entire length of the transmission shaft 20 or a series of several consecutive fixing sections 22 along the length of the transmission shaft 20 may/may be formed.
L' élément de transmission 40 peut comprendre une partie d' emmanchement 44 emmanchée sut le tronçon de fixation 22 et une vis de serrage 46 permettant de serrer la partie d' emmanchement 44 contre le tronçon de fixation 22 . La surface de fixation complémentaire 42 peut être prévue sur la partie d' emmanchement 44 . Cet assemblage permet de précontraindre la partie d'emmanchement 44 pour fixer l'élément de transmission 40 au tronçon de fixation 22 par frottement entre la surface de fixation 24 et la surface de fixation complémentaire 42. The transmission element 40 may comprise a fitting part 44 fitted onto the fixing section 22 and a tightening screw 46 making it possible to tighten the fitting part 44 against the fixing section 22 . The complementary fixing surface 42 can be provided on the fitting part 44 . This assembly makes it possible to prestress the fitting part 44 to fix the transmission element 40 to the fixing section 22 by friction between the fixing surface 24 and the complementary fixing surface 42.
La partie d'emmanchement 44 peut présenter une pluralité de surfaces de fixation complémentaires 42, de préférence non- parallèles entre elles . Le nombre de surfaces de fixation complémentaires 42 est de préférence égale au nombre de surfaces planes de fixation 24 prévues sur le tronçon de fixation 22 de l'arbre de transmission 20. La partie d'emmanchement 44 peut en section transversale présenter la forme du même polygone que prend le tronçon de fixation 22. The fitting part 44 may have a plurality of complementary fixing surfaces 42, preferably not parallel to one another. The number of complementary fixing surfaces 42 is preferably equal to the number of flat fixing surfaces 24 provided on the fixing section 22 of the transmission shaft 20. The fitting part 44 can in cross section have the shape of the same polygon taken by the attachment section 22.
L'arbre de transmission 20 peut présenter des congés d'arêtes sur sa surface externe afin de limiter les zones de concentration potentielle de contrainte sur l'arbre de transmission 20. Driveshaft 20 may have edge fillets on its outer surface to limit areas of potential stress concentration on driveshaft 20.
L'élément de transmission 40 peut comprendre une goupille 48 formant un obstacle mécanique à un déplacement de l'élément de transmission 40 le long de l'arbre de transmission 20 en parallèle à l'axe longitudinal A. The transmission element 40 may comprise a pin 48 forming a mechanical obstacle to movement of the transmission element 40 along the transmission shaft 20 parallel to the longitudinal axis A.
L'élément de transmission 40 et/ou l'arbre de transmission 20 peut/peuvent chacun comporter un perçage 50, 26 dans lequel/lesquels est reçu la goupille 48, le perçage 50 de l'élément de transmission 40 étant de préférence aménagé dans la partie d'emmanchement 44 et/ou le perçage 26 de l'arbre de transmission 20 étant de préférence aménagé dans la surface de fixation 24. The transmission element 40 and/or the transmission shaft 20 may/may each comprise a bore 50, 26 in which the pin 48 is received, the bore 50 of the transmission element 40 preferably being arranged in the fitting part 44 and/or the bore 26 of the transmission shaft 20 preferably being arranged in the fixing surface 24.
La goupille 48 peut être maintenue dans les perçages 50, 26 à l'aide d'une tôle de maintien 54. La tôle de maintien 54 peut être pourvue d'une ouverture recevant la goupille 48. La tôle de maintien 54 peut être fixée à l'élément de transmission 40, de préférence à la partie d'emmanchement 44 de l'élément de transmission 40 à l'aide d'une vis de fixation 56 vissée dans un trou taraudé 58 de l'élément de transmission 40. The pin 48 can be maintained in the bores 50, 26 using a retaining plate 54. The retaining plate 54 can be provided with an opening receiving the pin 48. The retaining plate 54 can be fixed to the transmission element 40, preferably to the fitting part 44 of the transmission element 40 using a fixing screw 56 screwed into a tapped hole 58 of the transmission element 40.
Le dispositif de transmission de mouvement 10 peut en outre comporter un adhésif 60 reliant l'élément de transmission 40 au tronçon de fixation 22. L' élément de transmission 40 peut comprendre un trou 52 pour l' injection de l' adhésif 60 . Le trou 52 peut déboucher dans la surface de fixation complémentaire 42 . Le trou 52 peut être aménagé dans la partie d' emmanchement 44 . The movement transmission device 10 may also comprise an adhesive 60 connecting the transmission element 40 to the fixing section 22. The transmission element 40 can comprise a hole 52 for the injection of the adhesive 60 . The hole 52 can emerge in the complementary fixing surface 42 . The hole 52 can be arranged in the fitting part 44 .
Le tronçon de fixation 22 de forme polygonale permet une multiplication des zones de contraintes dans l' arbre de transmission 20 , ce qui favorise la progressivité du chargement local entre l ' arbre de transmission 20 et l ' élément de transmission 40 . The fixing section 22 of polygonal shape allows a multiplication of the stress zones in the transmission shaft 20 , which promotes the progressiveness of the local loading between the transmission shaft 20 and the transmission element 40 .
Pour ce qui concerne une torsion de l' arbre de transmission 20 , l' inertie polaire de section droite du tronçon de fixation 22 correspond au cumul des inerties polaires de l ' arbre de transmission 20 et de l ' élément de transmission 40 . De ce fait , la rigidité torsionnelle du tronçon de fixation 22 est plus grande et la contrainte de cisaillement due à la torsion est plus faible . Pour ce qui concerne une flexion de l' arbre de transmission 20 , les inerties de section droite se cumulent de la même manière et donc ont le même effet bénéfique . Cette propriété permet d' envisager un goupillage dans la surface de fixation 42 , de préférence dans une partie centrale de la surface de fixation 42 , sans que le goupillage engendre des sur contraintes , le serrage de l' élément de transmission 40 renforce cette partie centrale de la surface de fixation 42 . Ce goupillage ne réduit en rien la performance du dispositif de transmission 10 contrairement à un dispositif de transmission classique où il représente le point faible du dispositif . With regard to a torsion of the transmission shaft 20 , the polar inertia of cross-section of the fixing section 22 corresponds to the accumulation of the polar inertias of the transmission shaft 20 and of the transmission element 40 . As a result, the torsional stiffness of the attachment section 22 is greater and the shear stress due to torsion is lower. With regard to a bending of the transmission shaft 20, the cross-section inertias are accumulated in the same way and therefore have the same beneficial effect. This property makes it possible to envisage a pinning in the fixing surface 42 , preferably in a central part of the fixing surface 42 , without the pinning generating overstresses, the tightening of the transmission element 40 reinforces this central part of the fixing surface 42 . This pinning in no way reduces the performance of the transmission device 10 unlike a conventional transmission device where it represents the weak point of the device.
Le dispositif de transmission de mouvement 10 selon la présente demande peut être fabriqué à l ' aide d' un procédé de fabrication comprenant les étapes successives suivantes : mise à disposition d' une préforme d' un arbre de transmission 20 et mise à disposition d' un élément de transmission 40 comportant une surface de fixation 42 complémentaire essentiellement plane ; agencement de l ' élément de transmission 40 par rapport à la préforme de sorte à positionner la surface de fixation 42 complémentaire en face d' une partie de la préforme destinée à former d' un tronçon de fixation 22 ; insertion de l' agencement de l ' élément de transmission 40 et de la préforme dans un moule 100 ; et injection d' une matrice dans le moule 100 pour former l ' arbre de transmission 20 comportant un tronçon de fixation 22 pourvu d' une surface de fixation 24 essentiellement plane venant épouser la surface de fixation complémentaire 42 de l' élément de transmission 40 . The motion transmission device 10 according to the present application can be manufactured using a manufacturing method comprising the following successive steps: providing a preform of a transmission shaft 20 and providing a transmission element 40 comprising an essentially planar complementary fixing surface 42; arrangement of the transmission element 40 relative to the preform so as to position the complementary fixing surface 42 opposite a part of the preform intended to form a fixing section 22; inserting the arrangement of the transmission element 40 and the preform into a mold 100; and injection of a die into the mold 100 to form the transmission shaft 20 comprising an attachment section 22 provided with an essentially planar attachment surface 24 which mates with the complementary attachment surface 42 of the transmission element 40 .
De façon alternative, le dispositif de transmission de mouvement 10 selon la présente demande peut être fabriqué à l' aide d' un procédé de fabrication comprenant les étapes successives suivantes : mise à disposition d' une préforme d' un arbre de transmission 20 ; insertion de la préforme dans un moule 100 ; injection d' une matrice dans le moule 100 pour former l ' arbre de transmission 20 comportant un tronçon de fixation 22 pourvu d' une surface de fixation 24 essentiellement plane ; et emmanchement d' une partie d' emmanchement 44 d' un élément de transmission 40 de sorte à ce qu' une surface de fixation complémentaire 42 de l' élément élément de transmission 40 vienne épouser la surface de fixation 24 de l ' arbre de transmission 20 . Alternatively, the motion transmission device 10 according to the present application can be manufactured using a manufacturing method comprising the following successive steps: providing a preform of a transmission shaft 20; inserting the preform into a mold 100; injection of a die into the mold 100 to form the transmission shaft 20 comprising an attachment section 22 provided with an essentially planar attachment surface 24; and fitting of a fitting part 44 of a transmission element 40 so that a complementary fixing surface 42 of the transmission element element 40 matches the fixing surface 24 of the transmission shaft 20 .
Selon une possibilité , l' arbre de transmission 20 peut être fabriquer par pultrusion, notamment au cas où l ' arbre de transmission 20 comporte une section constante sur toute sa longueur . According to one possibility, the transmission shaft 20 can be manufactured by pultrusion, in particular in the case where the transmission shaft 20 has a constant section over its entire length.
Le procédé de fabrication peut comprendre le serrage d' une vis de serrage 46 afin de serrer la partie d' emmanchement 44 contre le tronçon de fixation 22 . Le serrage de la partie d' emmanchement 44 contre le tronçon de fixation 22 peut avantageusement faire usage d'une déformabilité de l'élément de transmission 40. The manufacturing method may include the tightening of a tightening screw 46 in order to tighten the fitting part 44 against the fixing section 22 . Tightening part fitting 44 against the fixing section 22 can advantageously make use of a deformability of the transmission element 40.
Le procédé de fabrication peut comprendre l'application d'un adhésif 60 entre l'élément de transmission 40 et le tronçon de fixation 22 pour relier l'élément de transmission 40 au tronçon de fixation 22. L'application de l'adhésif 60 peut être effectuée en injectant l'adhésif 60 dans le trou 52. The manufacturing method may include applying an adhesive 60 between the transmission element 40 and the attachment section 22 to connect the transmission element 40 to the attachment section 22. The application of the adhesive 60 may be effected by injecting adhesive 60 into hole 52.
Le moule 100 peut comprendre deux parties de moule 110, 120. Dans le cas où l'arbre de transmission 20 est réalisé en matériau composite, l'arbre de transmission 20 peut être moulé dans un moule femelle 100, polymérisé sous pression interne via une vessie gonflable 130. Ce mode de réalisation permet de garantir une grande qualité de la surface extérieure de l'arbre de transmission 20, ce qui permet d'obtenir au moins une surface de fixation 24 nécessaires à la fixation de l'élément de transmission 40 avec précision . The mold 100 can comprise two mold parts 110, 120. In the case where the transmission shaft 20 is made of composite material, the transmission shaft 20 can be molded in a female mold 100, polymerized under internal pressure via a inflatable bladder 130. This embodiment makes it possible to guarantee a high quality of the external surface of the transmission shaft 20, which makes it possible to obtain at least one fixing surface 24 necessary for fixing the transmission element 40 precisely .
Le procédé de fabrication du dispositif de transmission de mouvement 10 selon la présente demande peut comprendre un procédé de moulage correspondant au procédé de moulage défini par la demande de brevet FR3109746A1. The process for manufacturing the motion transmission device 10 according to the present application may comprise a molding process corresponding to the molding process defined by the patent application FR3109746A1.

Claims

REVENDICATIONS
1) Dispositif de transmission de mouvement pour un mécanisme d' actionnement et/ou d' ouverture et/ou de fermeture et/ou de verrouillage et/ou de déverrouillage d' un dispositif de commande mécanique de mouvement tel qu' une porte, un clapet , un renvoi d' angle ou une commande de vol d' un aéronef , comprenant un arbre de transmission (20) s ' étendant le long d' un axe longitudinal (A) , l ' arbre de transmission (20) comportant au moins un tronçon de fixation (22) , le dispositif de transmission de mouvement (10) comprenant en outre un élément de transmission (40) fixé au tronçon de fixation (22) , ledit tronçon de fixation (22 ) étant de section transversale non-circulaire dans un plan orthogonal à l' axe longitudinal (A) et comprenant au moins une surface de fixation (24 ) tandis que l ' élément de transmission (40) comporte une surface de fixation (42 ) complémentaire épousant la surface de fixation (24 ) , caractérisé en ce que d' une part ledit arbre de transmission (20) est fabriqué en un matériau composite, de préférence en un matériau composite comprenant des fibres de carbone, d' autre part ledit élément de transmission (40) est fabriqué en un matériau métallique, de préférence en aluminium, et il comprend une partie d' emmanchement (44) emmanchée sur ledit tronçon de fixation (22 ) tandis qu' au moins une vis de serrage (46) permet de serrer la partie d' emmanchement (44 ) contre le tronçon de fixation (22) . 1) Movement transmission device for a mechanism for actuating and / or opening and / or closing and / or locking and / or unlocking of a mechanical movement control device such as a door, a valve, an angle transmission or a flight control of an aircraft, comprising a transmission shaft (20) extending along a longitudinal axis (A), the transmission shaft (20) comprising at least a fixing section (22), the movement transmission device (10) further comprising a transmission element (40) fixed to the fixing section (22), said fixing section (22) being of non-circular cross-section in a plane orthogonal to the longitudinal axis (A) and comprising at least one fixing surface (24) while the transmission element (40) comprises a fixing surface (42) complementary to the fixing surface (24) , characterized in that on the one hand said transmission shaft (20) is made of a composite material, preferably of a composite material comprising carbon fibers, on the other hand said transmission element (40) is made of a metallic material, preferably aluminum, and it comprises a fitting part (44) fitted onto said fixing section (22) while at least one tightening screw (46) makes it possible to tighten the fitting part (44 ) against the fixing section (22).
2) Dispositif de transmission selon la revendication 1 , caractérisé en ce que la surface de fixation (24) et la surface de fixation (42 ) complémentaire sont essentiellement planes et s ' étendent chacune dans un plan parallèle à l ' axe longitudinal (A) . 2) Transmission device according to claim 1, characterized in that the fixing surface (24) and the fixing surface (42) complementary are substantially planar and each extend in a plane parallel to the longitudinal axis (A) .
3) Dispositif de transmission selon l ' une quelconque des revendications 1 à 2 , caractérisé en ce que le tronçon de fixation (22 ) comporte dans un plan orthogonal à l ' axe longitudinal (A) une section transversale de forme essentiellement polygonale, de préférence de forme d' un polygone équilatéral et/ou équiangulaire . 4) Dispositif de transmission selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'arbre de transmission (20) est un élément tubulaire. 3) A transmission device according to any one of claims 1 to 2, characterized in that the fixing section (22) comprises in a plane orthogonal to the longitudinal axis (A) a cross section of substantially polygonal shape, preferably of shape of an equilateral and/or equiangular polygon. 4) Transmission device according to any one of claims 1 to 3, characterized in that the transmission shaft (20) is a tubular element.
5) Dispositif de transmission selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'élément de transmission (40) comprend une goupille (48) formant un obstacle mécanique à un déplacement de l'élément de transmission (40) le long de l'arbre de transmission (20) en parallèle à l'axe longitudinal (A) . 5) Transmission device according to any one of claims 1 to 4, characterized in that the transmission element (40) comprises a pin (48) forming a mechanical obstacle to movement of the transmission element (40) along the transmission shaft (20) parallel to the longitudinal axis (A).
6) Dispositif de transmission selon la revendication 5 caractérisé en ce que l'élément de transmission (40) et/ou l'arbre de transmission (20) comportent chacun un perçage (50, 26) dans lequel/lesquels est reçu la goupille (48) , le perçage (50) de l'élément de transmission (40) étant de préférence aménagé dans la partie d'emmanchement (44) et/ou le perçage (26) de l'arbre de transmission (20) étant de préférence aménagé dans la surface de fixation (24) . 6) Transmission device according to claim 5 characterized in that the transmission element (40) and / or the transmission shaft (20) each comprise a bore (50, 26) in which / which is received the pin ( 48), the bore (50) of the transmission element (40) preferably being arranged in the fitting part (44) and/or the bore (26) of the transmission shaft (20) preferably being arranged in the fixing surface (24).
7) Dispositif de transmission selon l'une quelconque des revendications 1 à 6, caractérisé en ce qu'il comporte en outre un adhésif (60) reliant l'élément de transmission (40) au tronçon de fixation (22) . 7) Transmission device according to any one of claims 1 to 6, characterized in that it further comprises an adhesive (60) connecting the transmission element (40) to the fixing section (22).
8) Aéronef comprenant un dispositif de transmission de mouvement (10) selon l'une quelconque des revendications 1 à 7. 8) Aircraft comprising a motion transmission device (10) according to any one of claims 1 to 7.
PCT/EP2023/054909 2022-03-04 2023-02-28 Movement transmission device for an aircraft WO2023165951A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FRFR2201891 2022-03-04
FR2201891A FR3133171A1 (en) 2022-03-04 2022-03-04 motion transmission device for an aircraft

Publications (1)

Publication Number Publication Date
WO2023165951A1 true WO2023165951A1 (en) 2023-09-07

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FR (1) FR3133171A1 (en)
WO (1) WO2023165951A1 (en)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2804322A (en) * 1954-11-23 1957-08-27 Herzog Carl Rotary element and shaft assembly
US5544740A (en) * 1994-07-25 1996-08-13 The Laitram Corporation Conveying apparatus
US5580184A (en) * 1995-04-28 1996-12-03 The Torrington Company Angular adjustable clamp yoke
EP0743240B1 (en) 1995-05-15 2002-09-04 The Boeing Company Latch-lock mechanism for load carrying airplane cargo doors
US20090005184A1 (en) * 2007-06-18 2009-01-01 Skf Aerospace France Shaft for transmitting rotational movements and/or forces
WO2014118480A1 (en) * 2013-02-04 2014-08-07 Safran Improved method for producing a transmission shaft, preferably for an accessory box system of an aircraft turbomachine
EP3081822A1 (en) * 2015-04-16 2016-10-19 AIRBUS HELICOPTERS DEUTSCHLAND GmbH Hybrid metal-composite drive shaft unit and method of manufacturing the same
WO2016180901A1 (en) * 2015-05-11 2016-11-17 Sigma Precision Components Limited Fibre reinforced polymer matrix composite torque tubes or shafts
WO2017117497A1 (en) * 2015-12-31 2017-07-06 Moog Inc. Composite torque tube end fitting attachment method
US20180112691A1 (en) * 2016-10-21 2018-04-26 Robotzone, Llc Clamping hub
FR3109746A1 (en) 2020-04-30 2021-11-05 Conseil Et Technique Manufacturing process by molding elongated and hollow composite material parts, mold device for its implementation and parts obtained.

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2804322A (en) * 1954-11-23 1957-08-27 Herzog Carl Rotary element and shaft assembly
US5544740A (en) * 1994-07-25 1996-08-13 The Laitram Corporation Conveying apparatus
US5580184A (en) * 1995-04-28 1996-12-03 The Torrington Company Angular adjustable clamp yoke
EP0743240B1 (en) 1995-05-15 2002-09-04 The Boeing Company Latch-lock mechanism for load carrying airplane cargo doors
US20090005184A1 (en) * 2007-06-18 2009-01-01 Skf Aerospace France Shaft for transmitting rotational movements and/or forces
WO2014118480A1 (en) * 2013-02-04 2014-08-07 Safran Improved method for producing a transmission shaft, preferably for an accessory box system of an aircraft turbomachine
EP3081822A1 (en) * 2015-04-16 2016-10-19 AIRBUS HELICOPTERS DEUTSCHLAND GmbH Hybrid metal-composite drive shaft unit and method of manufacturing the same
WO2016180901A1 (en) * 2015-05-11 2016-11-17 Sigma Precision Components Limited Fibre reinforced polymer matrix composite torque tubes or shafts
WO2017117497A1 (en) * 2015-12-31 2017-07-06 Moog Inc. Composite torque tube end fitting attachment method
US20180112691A1 (en) * 2016-10-21 2018-04-26 Robotzone, Llc Clamping hub
FR3109746A1 (en) 2020-04-30 2021-11-05 Conseil Et Technique Manufacturing process by molding elongated and hollow composite material parts, mold device for its implementation and parts obtained.

Also Published As

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