EP1838957A1 - Method for fixing a flexible drive shaft in a thrust reverser and a thrust reverser of this type - Google Patents

Method for fixing a flexible drive shaft in a thrust reverser and a thrust reverser of this type

Info

Publication number
EP1838957A1
EP1838957A1 EP05826574A EP05826574A EP1838957A1 EP 1838957 A1 EP1838957 A1 EP 1838957A1 EP 05826574 A EP05826574 A EP 05826574A EP 05826574 A EP05826574 A EP 05826574A EP 1838957 A1 EP1838957 A1 EP 1838957A1
Authority
EP
European Patent Office
Prior art keywords
thrust reverser
transmission shaft
fixing
front frame
fixing sleeve
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP05826574A
Other languages
German (de)
French (fr)
Inventor
Gautier Chapuis
Joachim Mirabaud
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Safran Nacelles SAS
Original Assignee
Aircelle SA
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 Aircelle SA filed Critical Aircelle SA
Publication of EP1838957A1 publication Critical patent/EP1838957A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02KJET-PROPULSION PLANTS
    • F02K1/00Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
    • F02K1/54Nozzles having means for reversing jet thrust
    • F02K1/76Control or regulation of thrust reversers
    • F02K1/763Control or regulation of thrust reversers with actuating systems or actuating devices; Arrangement of actuators for thrust reversers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05DINDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00Manufacture
    • F05D2230/60Assembly methods
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00Joints and connections
    • Y10T403/70Interfitted members
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00Machine element or mechanism
    • Y10T74/20Control lever and linkage systems
    • Y10T74/20396Hand operated
    • Y10T74/20402Flexible transmitter [e.g., Bowden cable]
    • Y10T74/2045Flexible transmitter [e.g., Bowden cable] and sheath support, connector, or anchor

Definitions

  • the present invention relates, on the one hand, to a method of fixing a flexible transmission shaft in a front frame of a thrust reverser, said front frame being made using two semi-circular half-open elements and on the other hand, a thrust reverser comprising at least one transmission shaft fixed according to this method.
  • the role of a thrust reverser is to improve the braking capacity of an aircraft by redirecting forward at least a portion of the thrust generated by the turbojet engine.
  • the inverter obstructs the gas ejection nozzle and directs the ejection flow of the engine towards the front of the nacelle, thereby generating a counter-thrust which is added to the braking of the wheels of the engine. the plane.
  • the structure of an inverter comprises movable covers movable between, on the one hand, an extended position in which they open in the nacelle a passage intended for the deflected flow, and on the other hand, a position retraction in which they close this passage.
  • These mobile hoods may furthermore perform a deflection function or simply the activation of other deflection means.
  • these movable covers are actuated by jacks controlled by drive systems fixed in the front frame of the thrust reverser.
  • the front frame is formed from two semi-circular elements in which are fixed the different drive systems.
  • the connection between two drive systems respectively arranged in one and the other of the two semicircular elements is provided by means of a flexible transmission shaft.
  • the latter has, on the one hand, a first end attached to the drive system located on one of the two elements, and secondly, a second end attached to the other element.
  • the object of the present invention is to overcome the drawbacks mentioned above, and for this purpose consists in a method of fixing a flexible transmission shaft in a front frame of a thrust reverser, said front frame being made with the aid of two semi-circular half-open elements, this method comprising a step during which a first end of said transmission shaft is attached to a drive system fixed in a front frame member, characterized in that it comprises the steps of :
  • a step is substituted during which a fixing sleeve is all simply introduced into force in the housing of the associated mounting bracket, which ultimately allows to keep the transmission shaft in a predetermined position.
  • this fixing sleeve can be monoblock or can be achieved using several adapted parts.
  • a fixing support is positioned between the two partially open elements constituting the front frame. In addition, these two Elements are usually ajar at the top of the thrust reverser.
  • each attachment sleeve capable of cooperating with complementary positioning means formed in the associated fixing support.
  • each attachment sleeve may comprise at least one groove in which can engage a bead presented by the associated fixing medium.
  • the present invention also relates to a thrust reverser used in aeronautics having a front frame comprising two semicircular elements equipped with at least one flexible transmission shaft having, on the one hand, a first end attached to a system in a constituent element of the front frame, and secondly, a second end attached to a drive system fixed in the other element, characterized in that at least one fixing sleeve is positioned around the transmission shaft, and in that each fixing sleeve is forcefully introduced into a housing presented by an associated fastening support secured to said thrust reverser, in order to maintain the transmission shaft in a predetermined position.
  • each fixing support comprises a sheath defining a housing of substantially circular section.
  • this sheath preferably has a longitudinal opening whose passage section is slightly greater than the diameter of the transmission shaft.
  • each fixing sleeve is of circular section and has a diameter slightly greater than that of the sheath of the associated fixing support.
  • each fixing sleeve is provided with at least one positioning means adapted to cooperate with a complementary positioning means presented by the associated fixing support.
  • each attachment sleeve may comprise at least one groove in which is engaged a bead presented by the associated fastening support.
  • each attachment sleeve may have first and second chamfered ends.
  • Figure 2 is a view similar to that shown in Figure 1, once the drive shaft is properly attached;
  • Figure 3 is a partial perspective view of a transmission shaft provided with a fixing sleeve and an associated fixing support.
  • FIG. 4 is a partial front view of the transmission shaft and the fixing support shown in FIG. 3.
  • FIG. 5 is a view similar to FIG. 4, once the transmission shaft is engaged in the mounting bracket.
  • Figure 6 is a view similar to Figure 4, once the attachment sleeve is engaged in the mounting bracket.
  • Figure 7 is a sectional view along the line VII-VII of Figure 6.
  • a front frame 1 of a thrust reverser is made using two elements 2, 3 semi-circular to which are attached longitudinal panels (not shown). Depending on whether the thrust reverser is doors or grids, these panels are then respectively fixed or movable in translation. Whatever the configuration, the front frame 1 is equipped with cylinders 4, 5 whose function is, as the case may be, to deploy deflection doors, or to move the movable panels in translation which are connected by deflection grids.
  • cylinders 4, 5 are controlled by drive systems 7, 8 respectively fixed in the elements 2, 3 of the front frame
  • a fixing sleeve 10 defining a channel whose inner diameter is very slightly greater than that of the transmission shaft 9, is slid along the latter.
  • This attachment sleeve 10, as shown in FIGS. Figures 3 to 7, is made of rubber and comprises, on the one hand, a central zone 11 surrounded by two grooves 12, and on the other hand, two chamfered ends 13.
  • a metal fastening support 14 is also secured to the connecting rod 6 ensuring the connection between the two elements 2, 3. When they are ajar, the fixing support 14 is positioned between the two elements 2, 3, and thus remains in the field of view of the staff.
  • this fixing support 14 is broken down, on the one hand, into a base 15 screwed into the connecting rod 6, and on the other hand, into a sheath 16 of circular section having two longitudinal edges 17 defining a longitudinal opening.
  • the sheath 16 is integral with the base 15, and is designed to have a certain radial elasticity.
  • this sheath 16 is equipped with beads 18 intended to cooperate with the grooves 12 of the sleeve 10.
  • the two edges 17 are spaced from one another by a distance which is greater than the diameter of the transmission shaft 9, but smaller than the largest diameter of the fixing sleeve 10.
  • the diameter of the sheath 16 is smaller than the largest diameter of the fixing sleeve 10.
  • This operator then only has to insert the attachment sleeve 10 into the sheath 16 of the attachment support 14 so that the transmission shaft 9 is perfectly held in position.
  • it first introduces a portion of the transmission shaft 9 located downstream of the attachment sleeve 10 into the sheath 16.
  • the operator can exercise a greater traction to force the fastening sleeve 10 to slide in the sheath 16.
  • the latter is then deformed radially and its beads 18 are ultimately forced to penetrate in one of the two grooves 12 of the attachment sleeve 10.
  • the latter and the transmission shaft 9 are then perfectly maintained in position in the front frame 1.
  • an obvious variant embodiment of the invention may consist in the fact that the operator proceeds to insert the fixing sleeve 10 into the associated fixing support 14 before connecting the second end 20 the drive shaft 9 to the drive system 8.

Abstract

The invention relates to a method for fixing a flexible drive shaft (9) in a front frame (1) of a thrust reverser, this front frame being realized with the aid of two partially open semicircular elements (2, 3). The inventive method comprises a step during which a first end (19) of this shaft is linked to a drive system (7) fixed in an element (2) of the front frame, characterized in that it comprises the steps serving to: position at least one fixing sleeve (10) around the shaft; joining at least one fixing support (14) to the thrust reverser; connecting the second end (20) of the shaft to a drive system (8) fixed in the other element (3) of the front frame; force-inserting each fixing sleeve into a seat provided by the associated fixing support in order to hold the shaft in a predetermined position. The invention also relates to a thrust reverser used in aeronautics having a fixing sleeve (10) placed around the drive shaft.

Description

PROCEDE DE FIXATION D' UN ARBRE DE TRANSMISSION FLEXIBLE DANS UN METHOD FOR FASTENING A FLEXIBLE TRANSMISSION SHAFT IN A
INVERSEUR DEINVERTER OF
POUSSEE ET UN TEL INVERSEUR DE POUSSEEPUSHED AND SUCH PUSHER INVERTER
La présente invention se rapporte, d'une part, à un procédé de fixation d'un arbre de transmission flexible dans un cadre avant d'un inverseur de poussée, ledit cadre avant étant réalisé à l'aide de deux éléments semi- circulaires entrouverts, et d'autre part, à un inverseur de poussée comprenant au moins un arbre de transmission fixé selon ce procédé.The present invention relates, on the one hand, to a method of fixing a flexible transmission shaft in a front frame of a thrust reverser, said front frame being made using two semi-circular half-open elements and on the other hand, a thrust reverser comprising at least one transmission shaft fixed according to this method.
Le rôle d'un inverseur de poussée est d'améliorer la capacité de freinage d'un avion en redirigeant vers l'avant au moins une partie de la poussée générée par le turboréacteur. Dans cette phase, l'inverseur obstrue la tuyère d'éjection des gaz et dirige le flux d'éjection du moteur vers l'avant de la nacelle, générant de ce fait une contre-poussée qui vient s'ajouter au freinage des roues de l'avion.The role of a thrust reverser is to improve the braking capacity of an aircraft by redirecting forward at least a portion of the thrust generated by the turbojet engine. In this phase, the inverter obstructs the gas ejection nozzle and directs the ejection flow of the engine towards the front of the nacelle, thereby generating a counter-thrust which is added to the braking of the wheels of the engine. the plane.
Les moyens mis en œuvre pour réaliser cette réorientation du flux varient suivant le type d'inverseur. Cependant, dans tous les cas, la structure d'un inverseur comprend des capots mobiles déplaçables entre, d'une part, une position déployée dans laquelle ils ouvrent dans la nacelle un passage destiné au flux dévié, et d'autre part, une position d'escamotage dans laquelle ils ferment ce passage. Ces capots mobiles peuvent en outre remplir une fonction de déviation ou simplement d'activation d'autres moyens de déviation.The means implemented to achieve this reorientation of the flow vary according to the type of inverter. However, in all cases, the structure of an inverter comprises movable covers movable between, on the one hand, an extended position in which they open in the nacelle a passage intended for the deflected flow, and on the other hand, a position retraction in which they close this passage. These mobile hoods may furthermore perform a deflection function or simply the activation of other deflection means.
De manière générale, ces capots mobiles sont actionnés par des vérins commandés par des systèmes d'entraînement fixés dans le cadre avant de l'inverseur de poussée. De façon classique, le cadre avant est constitué à partir de deux éléments semi-circulaires dans lesquels sont fixés les différents systèmes d'entraînement. La liaison entre deux systèmes d'entraînement disposés respectivement dans l'un et dans l'autre des deux éléments semi- circulaires est assurée à l'aide d'un arbre de transmission flexible. Pour ce faire, ce dernier présente, d'une part, une première extrémité rattachée au système d'entraînement situé sur l'un des deux éléments, et d'autre part, une seconde extrémité rattachée à l'autre élément.In general, these movable covers are actuated by jacks controlled by drive systems fixed in the front frame of the thrust reverser. Conventionally, the front frame is formed from two semi-circular elements in which are fixed the different drive systems. The connection between two drive systems respectively arranged in one and the other of the two semicircular elements is provided by means of a flexible transmission shaft. To do this, the latter has, on the one hand, a first end attached to the drive system located on one of the two elements, and secondly, a second end attached to the other element.
Bien évidemment, un tel arbre de transmission doit être maintenu dans une position bien déterminée au niveau du cadre avant. Pour cela, des bagues de serrage pourvues de pattes de rattachement prévues pour être vissées dans des plaques support solidaires de l'inverseur sont disposées régulièrement sur toute la longueur de l'arbre de transmission. Cependant, il est très délicat pour un opérateur de procéder à la fixation de chaque bague de serrage dans une plaque support associée. Tout particulièrement lorsque les deux éléments semi-circulaires du cadre avant sont entrouverts en partie supérieure de l'inverseur de poussée et que l'opérateur souhaite procéder à la fixation de l'arbre de transmission dans cette région. En effet, la mobilité de l'opérateur étant réduite, le principal inconvénient réside dans le fait que celui- ci a beaucoup de difficultés à exécuter convenablement l'opération minutieuse de vissage de la bague de serrage dans la plaque support associée. Par conséquent, l'exécution de cette phase est généralement très coûteuse en temps, et les risques de chutes de personnes ne sont pas à exclure.Obviously, such a transmission shaft must be maintained in a specific position at the front frame. For this, clamping rings provided with fastening lugs adapted to be screwed into support plates integral with the inverter are arranged regularly over the entire length of the transmission shaft. However, it is very difficult for an operator to fix each clamping ring in an associated support plate. Especially when the two semicircular elements of the front frame partially open top of the thrust reverser and that the operator wishes to proceed to the attachment of the drive shaft in this region. Indeed, the mobility of the operator being reduced, the main disadvantage lies in the fact that it has great difficulty to perform properly the careful operation of screwing the clamping ring in the associated support plate. Therefore, the execution of this phase is usually very time consuming, and the risk of falls from people can not be ruled out.
La présente invention a pour but de remédier aux inconvénients évoqués précédemment, et consiste pour cela en un procédé de fixation d'un arbre de transmission flexible dans un cadre avant d'un inverseur de poussée, ledit cadre avant étant réalisé à l'aide de deux éléments semi-circulaires entrouverts, ce procédé comprenant une étape au cours de laquelle une première extrémité dudit arbre de transmission est rattachée à un système d'entraînement fixé dans un élément du cadre avant, caractérisé en ce qu'il comprend les étapes visant à :The object of the present invention is to overcome the drawbacks mentioned above, and for this purpose consists in a method of fixing a flexible transmission shaft in a front frame of a thrust reverser, said front frame being made with the aid of two semi-circular half-open elements, this method comprising a step during which a first end of said transmission shaft is attached to a drive system fixed in a front frame member, characterized in that it comprises the steps of :
- positionner au moins un manchon de fixation autour de l'arbre de transmission,- positioning at least one fixing sleeve around the transmission shaft,
- solidariser au moins un support de fixation à l'inverseur de poussée, - raccorder la seconde extrémité de l'arbre de transmission à un système d'entraînement fixé dans l'autre élément du cadre avant,- attaching at least one attachment support to the thrust reverser, - connecting the second end of the transmission shaft to a drive system fixed in the other element of the front frame,
- introduire en force chaque manchon de fixation dans un logement présenté par le support de fixation associé afin de maintenir l'arbre de transmission dans une position prédéterminée.- Forcing each fixing sleeve into a housing presented by the associated mounting bracket to maintain the transmission shaft in a predetermined position.
Ainsi, dans le procédé de fixation selon l'invention, à l'étape de vissage d'une bague de serrage dans une plaque support pour laquelle des outils de précision doivent être manipulés, se substitue une étape durant laquelle un manchon de fixation est tout simplement introduit en force dans le logement du support de fixation associé, ce qui permet en définitive de maintenir l'arbre de transmission dans une position prédéterminée. Bien évidemment, ce manchon de fixation peut être monobloc ou peut être réalisé à l'aide de plusieurs pièces adaptées. Avantageusement, un support de fixation est positionné entre les deux éléments entrouverts constitutifs du cadre avant. De plus, ces deux éléments sont généralement entrouverts en partie supérieure de l'inverseur de poussée.Thus, in the fixing method according to the invention, in the step of screwing a clamping ring into a support plate for which precision tools must be manipulated, a step is substituted during which a fixing sleeve is all simply introduced into force in the housing of the associated mounting bracket, which ultimately allows to keep the transmission shaft in a predetermined position. Of course, this fixing sleeve can be monoblock or can be achieved using several adapted parts. Advantageously, a fixing support is positioned between the two partially open elements constituting the front frame. In addition, these two Elements are usually ajar at the top of the thrust reverser.
Préférentiellement, il est prévu de ménager au moins un moyen de positionnement dans chaque manchon de fixation apte à coopérer avec un moyen de positionnement complémentaire ménagé dans le support de fixation associé. Par exemple, chaque manchon de fixation peut comporter au moins une rainure dans laquelle peut s'engager un bourrelet présenté par le support de fixation associé.Preferably, provision is made to provide at least one positioning means in each attachment sleeve capable of cooperating with complementary positioning means formed in the associated fixing support. For example, each attachment sleeve may comprise at least one groove in which can engage a bead presented by the associated fixing medium.
La présente invention se rapporte également à un inverseur de poussée utilisé dans l'aéronautique possédant un cadre avant comprenant deux éléments semi-circulaires équipés d'au moins un arbre de transmission flexible présentant, d'une part, une première extrémité rattachée à un système d'entraînement fixé dans un élément constitutif du cadre avant, et d'autre part, une seconde extrémité rattachée à un système d'entraînement fixé dans l'autre élément, caractérisé en ce qu'au moins un manchon de fixation est positionné autour de l'arbre de transmission, et en ce que chaque manchon de fixation est introduit en force dans un logement présenté par un support de fixation associé solidaire dudit inverseur de poussée, afin de maintenir l'arbre de transmission dans une position prédéterminée. Avantageusement, chaque support de fixation comprend une gaine définissant un logement de section sensiblement circulaire. De plus, cette gaine possède de préférence une ouverture longitudinale dont la section de passage est légèrement supérieure au diamètre de l'arbre de transmission.The present invention also relates to a thrust reverser used in aeronautics having a front frame comprising two semicircular elements equipped with at least one flexible transmission shaft having, on the one hand, a first end attached to a system in a constituent element of the front frame, and secondly, a second end attached to a drive system fixed in the other element, characterized in that at least one fixing sleeve is positioned around the transmission shaft, and in that each fixing sleeve is forcefully introduced into a housing presented by an associated fastening support secured to said thrust reverser, in order to maintain the transmission shaft in a predetermined position. Advantageously, each fixing support comprises a sheath defining a housing of substantially circular section. In addition, this sheath preferably has a longitudinal opening whose passage section is slightly greater than the diameter of the transmission shaft.
Préférentiellement, chaque manchon de fixation est de section circulaire et possède un diamètre légèrement supérieur à celui de la gaine du support de fixation associé.Preferably, each fixing sleeve is of circular section and has a diameter slightly greater than that of the sheath of the associated fixing support.
Avantageusement encore, chaque manchon de fixation est pourvu d'au moins un moyen de positionnement apte à coopérer avec un moyen de positionnement complémentaire présenté par le support de fixation associé. Par exemple, chaque manchon de fixation peut comporter au moins une rainure dans laquelle est engagée un bourrelet présenté par le support de fixation associé.Advantageously, each fixing sleeve is provided with at least one positioning means adapted to cooperate with a complementary positioning means presented by the associated fixing support. For example, each attachment sleeve may comprise at least one groove in which is engaged a bead presented by the associated fastening support.
De plus, chaque manchon de fixation peut comporter une première et une seconde extrémités chanfreinées. L'invention sera mieux comprise à l'aide de la description détaillée qui est exposée ci-après en regard du dessin annexé dans lequel : La figure 1 est une vue schématique de face du cadre avant d'un inverseur de poussée selon l'invention, au cours de l'étape de fixation de l'arbre de transmission flexible ;In addition, each attachment sleeve may have first and second chamfered ends. The invention will be better understood with the aid of the detailed description which is explained below with reference to the appended drawing in which: Figure 1 is a schematic front view of the front frame of a thrust reverser according to the invention, during the step of fixing the flexible transmission shaft;
La figure 2 est une vue similaire à celle représentée à la figure 1 , une fois que l'arbre de transmission est convenablement fixé ;Figure 2 is a view similar to that shown in Figure 1, once the drive shaft is properly attached;
La figure 3 est une vue partielle en perspective d'un arbre de transmission muni d'un manchon de fixation et d'un support de fixation associé.Figure 3 is a partial perspective view of a transmission shaft provided with a fixing sleeve and an associated fixing support.
La figure 4 est une vue partielle de face de l'arbre de transmission et du support de fixation représentés à la figure 3. La figure 5 est une vue similaire à la figure 4, une fois que l'arbre de transmission est engagé dans le support de fixation.FIG. 4 is a partial front view of the transmission shaft and the fixing support shown in FIG. 3. FIG. 5 is a view similar to FIG. 4, once the transmission shaft is engaged in the mounting bracket.
La figure 6 est une vue similaire à la figure 4, une fois que le manchon de fixation est engagé dans le support de fixation.Figure 6 is a view similar to Figure 4, once the attachment sleeve is engaged in the mounting bracket.
La figure 7 est une vue en coupe selon la ligne VII-VII de la figure 6.Figure 7 is a sectional view along the line VII-VII of Figure 6.
Un cadre avant 1 d'un inverseur de poussée, tel que représenté aux figures 1 et 2, est réalisé à l'aide de deux éléments 2, 3 semi-circulaires auxquels sont rattachés des panneaux longitudinaux (non représentés). Selon que l'inverseur de poussée est à portes ou à grilles, ces panneaux sont alors respectivement fixes ou mobiles en translation. Quelle que soit la configuration, le cadre avant 1 est équipé en vérins 4, 5 qui ont pour fonction, selon le cas, soit de déployer des portes de déviation, soit de mouvoir les panneaux mobiles en translation auxquels sont reliées des grilles de déviation.A front frame 1 of a thrust reverser, as shown in Figures 1 and 2, is made using two elements 2, 3 semi-circular to which are attached longitudinal panels (not shown). Depending on whether the thrust reverser is doors or grids, these panels are then respectively fixed or movable in translation. Whatever the configuration, the front frame 1 is equipped with cylinders 4, 5 whose function is, as the case may be, to deploy deflection doors, or to move the movable panels in translation which are connected by deflection grids.
Ces éléments 2, 3 sont articulés l'un par rapport à l'autre au moyen d'au moins une bielle 6 qui s'étend entre eux, en partie supérieure de l'inverseur de poussée. Comme représenté sur les figures 1 et 2, ces élémentsThese elements 2, 3 are articulated relative to each other by means of at least one connecting rod 6 which extends between them, in the upper part of the thrust reverser. As shown in FIGS. 1 and 2, these elements
2, 3 peuvent alors être entrouverts en partie haute pour permettre au personnel de maintenance d'accéder à l'intérieur de l'inverseur de poussée.2, 3 can then be opened at the top to allow maintenance personnel access to the inside of the thrust reverser.
Par ailleurs, les vérins 4, 5 sont commandés par des systèmes d'entraînement 7, 8 fixés respectivement dans les éléments 2, 3 du cadre avantFurthermore, the cylinders 4, 5 are controlled by drive systems 7, 8 respectively fixed in the elements 2, 3 of the front frame
1. De façon classique, ces moyens d'entraînement 7, 8 sont destinés à être reliés l'un à l'autre au moyen d'un arbre de transmission 9 flexible encore appelé « flexshaft ».1. In a conventional manner, these drive means 7, 8 are intended to be connected to each other by means of a flexible transmission shaft 9 also called "flexshaft".
Un manchon de fixation 10, définissant un canal dont le diamètre intérieur est très légèrement supérieur à celui de l'arbre de transmission 9, est glissé le long de ce dernier. Ce manchon de fixation 10, tel que représenté aux figures 3 à 7, est fabriqué en caoutchouc et comporte, d'une part, une zone centrale 11 encadrée par deux rainures 12, et d'autre part, deux extrémités chanfreinées 13.A fixing sleeve 10, defining a channel whose inner diameter is very slightly greater than that of the transmission shaft 9, is slid along the latter. This attachment sleeve 10, as shown in FIGS. Figures 3 to 7, is made of rubber and comprises, on the one hand, a central zone 11 surrounded by two grooves 12, and on the other hand, two chamfered ends 13.
Un support de fixation 14 métallique est par ailleurs solidarisé à la bielle 6 assurant la liaison entre les deux éléments 2, 3. Lorsque ces derniers sont entrouverts, le support de fixation 14 est donc positionné entre les deux éléments 2, 3, et demeure ainsi dans le champ de vision du personnel.A metal fastening support 14 is also secured to the connecting rod 6 ensuring the connection between the two elements 2, 3. When they are ajar, the fixing support 14 is positioned between the two elements 2, 3, and thus remains in the field of view of the staff.
Plus précisément, ce support de fixation 14 se décompose, d'une part, en une base 15 vissée dans la bielle 6, et d'autre part, en une gaine 16 de section circulaire possédant deux bords 17 longitudinaux définissant une ouverture longitudinale. La gaine 16 est solidaire de la base 15, et est conçue de façon à posséder une certaine élasticité radiale. De plus, cette gaine 16 est équipée de bourrelets 18 destinés à coopérer avec les rainures 12 du manchon 10. Les deux bords 17 sont espacés l'un de l'autre d'une distance qui est supérieure au diamètre de l'arbre de transmission 9, mais inférieure au plus grand diamètre du manchon de fixation 10. De même, le diamètre de la gaine 16 est inférieur au plus grand diamètre du manchon de fixation 10.More precisely, this fixing support 14 is broken down, on the one hand, into a base 15 screwed into the connecting rod 6, and on the other hand, into a sheath 16 of circular section having two longitudinal edges 17 defining a longitudinal opening. The sheath 16 is integral with the base 15, and is designed to have a certain radial elasticity. In addition, this sheath 16 is equipped with beads 18 intended to cooperate with the grooves 12 of the sleeve 10. The two edges 17 are spaced from one another by a distance which is greater than the diameter of the transmission shaft 9, but smaller than the largest diameter of the fixing sleeve 10. Likewise, the diameter of the sheath 16 is smaller than the largest diameter of the fixing sleeve 10.
Comme représenté plus spécialement à la figure 1, lorsqu'un opérateur qualifié souhaite relier les deux systèmes d'entraînement 7, 8 l'un à l'autre à l'aide de l'arbre de transmission 9, cet opérateur commence par connecter une première extrémité 19 de l'arbre de transmission 9 au système d'entraînement 7 logé dans l'élément 2.As shown more particularly in FIG. 1, when a qualified operator wishes to connect the two drive systems 7, 8 to one another with the aid of the transmission shaft 9, this operator starts by connecting a first end 19 of the transmission shaft 9 to the drive system 7 housed in the element 2.
Ensuite, en se référant à la figure 2, il se déplace du côté de l'élément 3 et connecte la seconde extrémité 20 de l'arbre de transmission 9 au système d'entraînement 8 logé dans l'élément 3.Then, referring to FIG. 2, it moves on the side of the element 3 and connects the second end 20 of the transmission shaft 9 to the drive system 8 housed in the element 3.
Cet opérateur n'a plus alors qu'à insérer le manchon de fixation 10 dans la gaine 16 du support de fixation 14 pour que l'arbre de transmission 9 soit parfaitement maintenu en position. Pour ce faire, comme représenté plus précisément sur la figure 5, il introduit tout d'abord une portion de l'arbre de transmission 9 située en aval du manchon de fixation 10 dans la gaine 16. Ensuite, il exerce une traction sur l'arbre de transmission 9 jusqu'à ce que l'extrémité chanfreinée 13 aval du manchon de fixation 10 pénètre dans la gaine 16. Une fois que cela est effectué, et comme représenté à la figure 6, l'opérateur peut exercer une traction plus importante pour forcer le manchon 10 de fixation à glisser dans la gaine 16. Cette dernière se déforme alors radialement et ses bourrelets 18 sont en définitive chacun amenés à pénétrer dans l'une des deux rainures 12 du manchon 10 de fixation. Ce dernier et l'arbre de transmission 9 sont alors parfaitement maintenus en position dans le cadre avant 1.This operator then only has to insert the attachment sleeve 10 into the sheath 16 of the attachment support 14 so that the transmission shaft 9 is perfectly held in position. To do this, as shown more precisely in FIG. 5, it first introduces a portion of the transmission shaft 9 located downstream of the attachment sleeve 10 into the sheath 16. Next, it exerts a pull on the transmission shaft 9 until the chamfered end 13 downstream of the attachment sleeve 10 enters the sheath 16. Once this is done, and as shown in Figure 6, the operator can exercise a greater traction to force the fastening sleeve 10 to slide in the sheath 16. The latter is then deformed radially and its beads 18 are ultimately forced to penetrate in one of the two grooves 12 of the attachment sleeve 10. The latter and the transmission shaft 9 are then perfectly maintained in position in the front frame 1.
Il doit être bien compris qu'une variante évidente de réalisation de l'invention peut consister dans le fait que l'opérateur procède à l'insertion du manchon de fixation 10 dans le support de fixation 14 associé avant de connecter la seconde extrémité 20 de l'arbre de transmission 9 au système d'entraînement 8.It should be understood that an obvious variant embodiment of the invention may consist in the fact that the operator proceeds to insert the fixing sleeve 10 into the associated fixing support 14 before connecting the second end 20 the drive shaft 9 to the drive system 8.
Bien que l'invention ait été décrite en liaison avec des exemples particuliers de réalisation, il est bien évident qu'elle n'y est nullement limitée et qu'elle comprend tous les équivalents techniques des moyens décrits ainsi que leurs combinaisons si celles-ci entrent dans le cadre de l'invention. Although the invention has been described in connection with particular embodiments, it is obvious that it is not limited thereto and that it comprises all the technical equivalents of the means described and their combinations if they are within the scope of the invention.

Claims

REVENDICATIONS
1.- Procédé de fixation d'un arbre de transmission (9) flexible dans un cadre avant (1) d'un inverseur de poussée, ledit cadre avant étant réalisé à l'aide de deux éléments (2, 3) semi-circulaires entrouverts, ce procédé comprenant une étape au cours de laquelle une première extrémité (19) dudit arbre de transmission est rattachée à un système d'entraînement (7) fixé dans un élément (2) du cadre avant, caractérisé en ce qu'il comprend les étapes visant à :1. A method of fixing a flexible transmission shaft (9) in a front frame (1) of a thrust reverser, said front frame being made using two semicircular elements (2, 3). interlocked, this method comprising a step in which a first end (19) of said transmission shaft is attached to a drive system (7) fixed in a member (2) of the front frame, characterized in that it comprises steps to:
- positionner au moins un manchon de fixation (10) autour de l'arbre de transmission,- positioning at least one fixing sleeve (10) around the transmission shaft,
- solidariser au moins un support de fixation (14) à l'inverseur de poussée,- Attach at least one attachment support (14) to the thrust reverser,
- raccorder la seconde extrémité (20) de l'arbre de transmission à un système d'entraînement (8) fixé dans l'autre élément (3) du cadre avant,- connect the second end (20) of the transmission shaft to a drive system (8) fixed in the other element (3) of the front frame,
- introduire en force chaque manchon de fixation dans un logement présenté par le support de fixation associé afin de maintenir l'arbre de transmission dans une position prédéterminée.- Forcing each fixing sleeve into a housing presented by the associated mounting bracket to maintain the transmission shaft in a predetermined position.
2. Procédé de fixation selon la revendication 1, caractérisé en ce qu'un support de fixation (14) est positionné entre les deux éléments (2, 3) entrouverts constitutifs du cadre avant (1 ).2. Fixing method according to claim 1, characterized in that a fastening support (14) is positioned between the two elements (2, 3) partly covered constituting the front frame (1).
3.- Procédé de fixation selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que les deux éléments (2, 3) constitutifs du cadre avant (1) sont entrouverts en partie supérieure de l'inverseur de poussée.3. Fixing method according to any one of claims 1 or 2, characterized in that the two elements (2, 3) constituting the front frame (1) are ajar in the upper part of the thrust reverser.
4.- Procédé de fixation selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'on ménage au moins un moyen de positionnement4. Fixing method according to any one of claims 1 to 3, characterized in that one household at least one positioning means
(12) dans chaque manchon de fixation (10) apte à coopérer avec un moyen de positionnement complémentaire (18) ménagé dans le support de fixation (14) associé.(12) in each fixing sleeve (10) adapted to cooperate with a complementary positioning means (18) formed in the associated fixing support (14).
5.- Procédé de fixation selon la revendication 4, caractérisé en ce que chaque manchon de fixation (10) comporte au moins une rainure (12) dans laquelle peut s'engager un bourrelet (18) présenté par le support de fixation5. Fastening method according to claim 4, characterized in that each fixing sleeve (10) comprises at least one groove (12) in which can engage a bead (18) presented by the mounting bracket
(10) associé.(10) associate.
6.- Inverseur de poussée utilisé dans l'aéronautique possédant un cadre avant (1 ) comprenant deux éléments (2, 3) semi-circulaires équipés d'au moins un arbre de transmission (9) flexible présentant, d'une part, une première extrémité (19) rattachée à un système d'entraînement (7) fixé dans un élément (2) constitutif du cadre avant, et d'autre part, une seconde extrémité6. A thrust reverser used in aeronautics having a front frame (1) comprising two semicircular elements (2, 3) equipped with at least one flexible transmission shaft (9) having, on the one hand, a first end (19) attached to a drive system (7) fixed in an element (2) constituting the front frame, and secondly, a second end
(20) rattachée à un système d'entraînement (8) fixé dans l'autre élément (3), caractérisé en ce qu'au moins un manchon de fixation (10) est positionné autour de l'arbre de transmission, et en ce que chaque manchon de fixation est introduit en force dans un logement présenté par un support de fixation (14) associé solidaire dudit inverseur de poussée, afin de maintenir l'arbre de transmission dans une position prédéterminée.(20) attached to a driving system (8) fixed in the other element (3), characterized in that at least one fixing sleeve (10) is positioned around the transmission shaft, and in that each fixing sleeve is forcefully introduced into a housing presented by a fastening support (14) associated with said thrust reverser, in order to maintain the transmission shaft in a predetermined position.
7.- Inverseur de poussée selon la revendication 6, caractérisé en ce que chaque support de fixation (14) comprend une gaine (16) définissant un logement de section sensiblement circulaire.7.- thrust reverser according to claim 6, characterized in that each fixing bracket (14) comprises a sheath (16) defining a substantially circular section housing.
8.- Inverseur de poussée selon la revendication 7, caractérisé en ce que la gaine (16) possède une ouverture longitudinale dont la section de passage est légèrement supérieure au diamètre de l'arbre de transmission (9). 8.- thrust reverser according to claim 7, characterized in that the sheath (16) has a longitudinal opening whose passage section is slightly greater than the diameter of the transmission shaft (9).
9.- Inverseur de poussée selon l'une quelconque des revendications 7 ou 8, caractérisé en ce que chaque manchon de fixation (10) est de section circulaire et possède un diamètre légèrement supérieur à celui de la gaine (16) du support de fixation (14) associé.9.- thrust reverser according to any one of claims 7 or 8, characterized in that each fixing sleeve (10) is of circular section and has a diameter slightly greater than that of the sheath (16) of the mounting bracket (14) associate.
10.- Inverseur de poussée selon l'une quelconque 6 à 9, caractérisé en ce que chaque manchon de fixation (10) est pourvu d'au moins un moyen de positionnement (12) apte à coopérer avec un moyen de positionnement complémentaire (18) présenté par le support de fixation (14) associé.10.- thrust reverser according to any one of 6 to 9, characterized in that each fixing sleeve (10) is provided with at least one positioning means (12) adapted to cooperate with a complementary positioning means (18). ) presented by the associated mounting bracket (14).
11.- Inverseur de poussée selon la revendication 10, caractérisé en ce que chaque manchon de fixation (10) comporte au moins une rainure (12) dans laquelle est engagée un bourrelet (18) présenté par le support de fixation11.- thrust reverser according to claim 10, characterized in that each fixing sleeve (10) comprises at least one groove (12) in which is engaged a bead (18) presented by the mounting bracket
(14) associé.(14) associate.
12.- Inverseur de poussée selon l'une quelconque des revendications 6 à 11 , caractérisé en ce que chaque manchon de fixation (10) comporte une première et une seconde extrémités chanfreinées (13). 12.- thrust reverser according to any one of claims 6 to 11, characterized in that each fixing sleeve (10) comprises a first and a second chamfered ends (13).
EP05826574A 2005-01-21 2005-12-15 Method for fixing a flexible drive shaft in a thrust reverser and a thrust reverser of this type Withdrawn EP1838957A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0500623A FR2881183B1 (en) 2005-01-21 2005-01-21 METHOD FOR FASTENING A FLEXIBLE TRANSMISSION SHAFT IN A PUSH REVIER
PCT/FR2005/003136 WO2006077290A1 (en) 2005-01-21 2005-12-15 Method for fixing a flexible drive shaft in a thrust reverser and a thrust reverser of this type

Publications (1)

Publication Number Publication Date
EP1838957A1 true EP1838957A1 (en) 2007-10-03

Family

ID=34953675

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Application Number Title Priority Date Filing Date
EP05826574A Withdrawn EP1838957A1 (en) 2005-01-21 2005-12-15 Method for fixing a flexible drive shaft in a thrust reverser and a thrust reverser of this type

Country Status (7)

Country Link
US (1) US20080041184A1 (en)
EP (1) EP1838957A1 (en)
CN (1) CN101084370A (en)
CA (1) CA2588578A1 (en)
FR (1) FR2881183B1 (en)
RU (1) RU2007130231A (en)
WO (1) WO2006077290A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0906392D0 (en) * 2009-04-15 2009-05-20 Goodrich Actuation Systems Ltd Thrust reverser actuator system
FR2966434B1 (en) * 2010-10-21 2013-05-31 Sagem Defense Securite ACTUATION SYSTEM FOR AN AIRCRAFT PROPULSION ASSEMBLY
US9188105B2 (en) * 2011-04-19 2015-11-17 Hamilton Sundstrand Corporation Strut driveshaft for ram air turbine

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Publication number Priority date Publication date Assignee Title
DE2232597A1 (en) * 1972-07-03 1974-01-24 Golde Gmbh H T FASTENING EQUIPMENT FOR CABLE GUIDE TUBES ON MOTOR VEHICLES
US4458582A (en) * 1982-10-18 1984-07-10 Sundstrand Corporation Automatic rigging arrangement for actuation systems
US5233881A (en) * 1992-07-17 1993-08-10 General Motors Corporation Door latch rod clip and insulator
TW440532B (en) * 2000-01-14 2001-06-16 Shimano Kk Cable Harness
US7946106B2 (en) * 2004-06-29 2011-05-24 Aircelle Device for actuating mobile cowls equipping a thrust reverser
US7435180B2 (en) * 2005-01-10 2008-10-14 Honeywell International Inc. Thrust reverser actuator system flex shaft assembly

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006077290A1 *

Also Published As

Publication number Publication date
CA2588578A1 (en) 2006-07-27
CN101084370A (en) 2007-12-05
WO2006077290A1 (en) 2006-07-27
FR2881183A1 (en) 2006-07-28
FR2881183B1 (en) 2007-04-06
US20080041184A1 (en) 2008-02-21
RU2007130231A (en) 2009-02-27

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