Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02K—JET-PROPULSION PLANTS
  • F02K1/00—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
  • F02K1/54—Nozzles having means for reversing jet thrust
  • F02K1/76—Control or regulation of thrust reversers
  • F02K1/766—Control or regulation of thrust reversers with blocking systems or locking devices; Arrangement of locking devices for thrust reversers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B64—AIRCRAFT; AVIATION; COSMONAUTICS
  • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
  • B64D33/00—Arrangement in aircraft of power plant parts or auxiliaries not otherwise provided for
  • B64D33/04—Arrangement in aircraft of power plant parts or auxiliaries not otherwise provided for of exhaust outlets or jet pipes
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02K—JET-PROPULSION PLANTS
  • F02K1/00—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
  • F02K1/54—Nozzles having means for reversing jet thrust
  • F02K1/76—Control or regulation of thrust reversers
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
  • F05D2260/00—Function
  • F05D2260/30—Retaining components in desired mutual position

Definitions

• the present invention relates to an active lock with mobilization assistance and a thrust reverser for turbojet engine nacelle incorporating such a lock.
• the lock makes it possible to attach an interface of the mobile structure of the thrust reverser to a point of the associated fixed structure, such as the nacelle of the turbojet that the thrust reverser equips.
• a first release command of the associated lock is received and activates the electric motor or actuator which mobilizes a movable bolt of the lock which then releases the locking interface of the moving structure. of the thrust reverser.
• a specific actuator for the deployment of the thrust reverser is then activated.
• a closure and locking device adapted to a thrust reverser.
• the device is adapted with a bolt capable of pushing the locking interface to the closed position of the movable structure which is secured to it by an additional movement caused by the driving motor of the bolt.
• the present invention provides a solution to these disadvantages of the state of the art in that it relates to an active latch secured to a fixed structure and which cooperates with a locking interface of a mobile structure by means of a driven bolt. by a controlled electric motor.
• the bolt is pivotally mounted with a pusher for pushing the mobile structure of the fixed structure during the deployment of the movable structure relative to the fixed structure driven by the electric motor controlled via a means of mobilization of the lock according to a determined sequence of movements of the rocking bolt and / or the pusher.
• the tilting bolt and the pusher are mounted on shafts driven by the bolt mobilizing means and having a common axis, the bolt affects a hook shape, and the pusher comprises a cleat hinged to a lever for applying a thrust force when the beginning of deployment of the mobile structure relative to the fixed structure;
• the rocking bolt and the pusher are mounted on shafts driven by the bolt mobilization means having a common axis, the bolt affects a hook shape, and the pusher has an end in contact with the movable structure in its closed state having a cam profile for applying a thrust force at the beginning of deployment of the movable structure relative to the fixed structure;
• the means for mobilizing the lock comprises disengageable connection means between the electric motor of the lock and the rocker bolt and / or between the electric motor of the latch and the pusher, so that a given sequence of movements of the rocking bolt is applied and pusher during deployment of the mobile structure;
• the disengageable connection means comprise jaw claws respectively associated with the rocker bolt and the pusher, cooperating with elastic means which push them away from each other when the electric motor connected to one of the claws ceases its activity, in that one of the jaw disks is driven on the shaft of the electric motor, the connection between the shaft and one of the disks, jaw and control of the electric motor arranged to determine said motion sequence;
• the disengageable connection means comprise a first disk having a groove formed and associated with the rocking bolt, the groove cooperating with at least one cam mounted on a second disk associated with the pusher and at least one lug on a fixed disk whose relative positions, activation of the electric motor coupled to at least one of the disks of the disengageable connection means, determine said sequence of movements;
• the disengageable connection means comprise a plurality of toothed wheels engaged by one of them to a drive wheel of the electric motor, a toothed wheel of said plurality carrying a shaft associated with the rocking bolt and another toothed wheel of said plurality carrying a shaft associated with the pusher, one of the wheels associated with the pusher or with the bolt comprises an im plet ented and being el ected by elastic means in a rest position when the electric motor is not not actuated, the wheels and the toothed sector being arranged to determine said sequence of movements;
• the invention also relates to a thrust reverser for turbojet nacelle, incorporating at least one active lock according to any one of the preceding claims.
• the fixed structure is associated with the turbojet nacelle and the mobile structure is associated with at least one sliding cowl of the thrust reverser.
• FIGS. 1a to 1c show three successive states of an embodiment of the active latch of the present invention
• FIGS. 2a and 2b show the arrangement of the active latch of the embodiment of FIGS. 1a to 1c installed in a fixed structure relative to a mobile structure, namely in the context of a thrust reverser for a nacelle of turbojet engine;
• FIGS. 3a to 3d show four successive states of another embodiment of the active latch of the present invention.
• FIGS. 4a and 4b show the arrangement of the active latch of the embodiment of FIGS. 1a to 1c installed in a fixed structure relative to a mobile structure, namely in the context of a thrust reverser for turbojet nacelle;
• FIGS. 5a to 5d show the successive states of an embodiment of part of an active lock according to the first or the second embodiment
• FIGS. 6a and 6b show two views of a second embodiment of part of an active lock according to the first or second embodiment
• FIG. 7 shows four successive states (a) to (d) of the portion of the second embodiment of FIGS. 6a and 6b;
• FIGS. 8a to 8c show the successive states of a third embodiment of part of an active latch according to the first or second embodiment.
• FIG. 9 shows the third embodiment of a portion of an active lock according to the first or second embodiment.
• FIGs 1a to 1d there is shown the successive states of an active lock according to a first embodiment of the invention.
• a rocker bolt 2 On a shaft 5b are mounted a rocker bolt 2 and a pusher 3, 4.
• the rocker bolt engages in the closed position of the movable structure 6, 7 inside a locking interface 6, hook-shaped , integral with the mobile structure 7. The latter is immobilized in the state shown in Figure 1a.
• the pusher is composed in the embodiment of two parts comprising a lever 3 rotating on the aforementioned axis 5b and a cleat 4 articulated on an axis 5a mounted on the end of the lever 3 opposite to that integral with the axis 5b .
• the movement of the two main parts of the active latch of the invention, namely the tilting bolt and the pusher, is determined using a means 1 of mobil isation of the active latch which cooperates with an electric motor. Their movement, joint or separate, is then distributed according to predetermined sequences between the rocking bolt 2 and the pusher 3,4, during the deployment of the movable structure 6, 7 ( Figures 2a, 2b).
• FIG. 1a there is shown the closing state of the active lock 1 - 4, the movable structure was in the closed position on the 8b position marked to the right of the axis 8a connecting the axes 5b and 5a, the pusher 3.4 being raised and the rocker bolt 2 engaged in the locking interface 6 integral with the mobile structure 7.
• the active latch has begun the opening sequence which makes it possible to release the locking interface 6 by lowering the rocking bolt 2 by means of a rotation C1 applied by the electric motor (not represented) coupled to the means 1 mobilization of the active lock.
• the pusher 4 follows a movement B1 which pushes the mobile structure 7 in a response A1 movement, because the lever 3 has turned at a given angle while the face of the latch 4 remains in contact with a corresponding face of the locking interface 6.
• the movable structure 7 then gains a more right position 8c compared to the closed position 8b.
• the movement A1 can be applied without the actuators (not shown) of the mobile structure 7 are activated only by the action of the active lock of the invention. It is thus possible to overcome the resistance to the opening of the mobile structure, and particularly, the deployment of the sliding cover of a thrust reverser integral with this mobile structure.
• FIG 1c there is shown the sequence of the sequence applied by the means 1 for mobilizing the active lock.
• the movement A2 of the movable structure 6, 7 is held by my own under the effect of its own actuators (not shown), its instantaneous position 8d moving away from the point reached 8c in the state of the Fig. 1 b.
• the rotation C2 applied by the means 1 for mobilizing the active latch makes it possible, on the one hand, to place the rocking bolt 2 in a waiting position for closing, and on the other hand to recall the pusher 3, 4 in the closed position according to the movement B2.
• the means 1 for mobilizing the active lock will apply a rotation on the single rocking bolt 2 to raise it from the waiting position of FIG. 1c to the position 1a with the locking interface 6 of the mobile structure 6 that will be returned to its closed position 8b under the effect of its own actuators.
• FIGS. 2a and 2b show an application of the active latch of the embodiment of FIGS. 1a to 1c to a thrust reverser for a turbojet engine nacelle.
• the active latch 2 is masked by a hood of a fixed structure 9A as the body of the nacelle of the turbojet engine.
• Fig. 2b which represents the state of closure of the thrust reverser as shown in Fig. 2a
• the active latch of the embodiment of Figs. 1a and 1c is shown mounted in a housing 9C with the rocking bolt 2 engaged in the locking interface 6 of the mobile structure 7; 9A.
• FIGS. 3a to 3c show the operating states of an active latch in a second embodiment of the invention.
• the active latch of this embodiment comprises a rocker bolt 1 1 articulated on a motor axis 1 3 and that i i affects a bent shape so that the rocker bolt 1 1 retains in the closed position a portion 1 2 linked to the movable structure .
• the motor shaft 13 is integral with a fixed structure not shown.
• the fixed and movable structures are identical to structures 9B and 9A of the embodiment of FIGS. 2a and 2b.
• a pusher 10 consists of a lever articulated on the motor shaft 13 already associated with the rocker bolt 1 1 and the two movable elements 10 and 1 1 of the active latch of this second embodiment are both mobilized by an electric motor. associated with a means of mobilization of the active latch, not shown here but similar to the means 1 for mobilizing the active latch of the first embodiment shown in Figures 1a to 1c.
• the free end of the pusher 10 affects a cam shape facing the part 1 2 linked to the movable structure.
• the cam shape has a first portion 14a to fit the shape facing the portion 12 connected to the movable structure when in the closed state as in Figure 3a. In this state of closure, the portion 12 is at the level marked by the mixed line January 8a characteristic of the closing state of the movable structure and the active lock.
• the cam shape of the pusher 1 0 has a second portion 14b which promotes the thrust of the pusher 10 on the portion 12 connected to the movable structure.
• the motor associated with the mobilization means of the active latch starts a tilting movement 16 of the rocker bolt 1 1, Figure 2b so that the portion 1 2 linked to the mobile structure is clear of the active lock. Then, the motor and the mobilization means of the active lock apply a rotation 15 to the pusher 10 so that the second portion 14b begins to push the portion 12 connected to the movable structure in position 18b.
• the pusher 10 has continued its course so that it pushed the portion 1 2 linked to the movable structure in its extreme position 18c.
• the natural actuators of the mobile structure that is to say in the preferred application of the invention to a thrust reverser, to a sliding thrust reverser cowl, then come into action and the part 12 linked to the moving structure then continues in instantaneous position 18d its deployment stroke of the thrust reverser autonomously movement of the active lock.
• the motor of the mobilization means of the active latch of the second embodiment of the invention brings the pusher 10 back to a standby position according to the rotation 17.
• the closing sequence is triggered by a specific command so that the pusher 10 returns to its position in Figure 3a to receive the portion 12 connected to the movable structure in the closed state, then the rocker bolt 1 1 folds in return behind the Part 1 2 l ied to the mobile structure. We will return to the state of Figure 3a.
• FIGS. 4a and 4b show the preferred application of the invention to a thrust reverser sliding cover similar to that of FIGS. 2a and 2b.
• the fixed structure 20 carries the active latch by means of a casing 23 inside which are mounted an electric motor 24 coupled to a gearbox itself mechanically coupled to a means 26 for mobilizing the active latch, the part 12 related to the mobile structure 21 affects a hook shape.
• Figure 4b is a schematic top view of Figure 4a.
• the mobilization means comprises in the invention an electric motor and disengageable connection means between the electric motor of the lock and the rocker bolt and / or between the electric motor of the lock and the pusher.
• the effect of the disengageable connection means of the invention is that a given sequence of movements of the rocking bolt and the pusher is applied during the deployment of the mobile structure.
• the tilting bolt and the pusher are articulated on a common axis to two shafts separated from the disengageable connection means, which then in a determined manner couple one or the other or the two separate shafts to the action of the electric motor associated with the means for mobilizing the active latch of the invention.
• elastic return means exert a part of the motor force in the absence of action of the electric motor.
• FIGS. 5a to 5d show four successive states of an active latch mobilization means in a first embodiment with claws.
• the means for mobilizing the active latch essentially comprises two disks 30 and 39 on the opposite faces of which claws 35 and 36 are arranged in relation.
• the disk 30 is provided with a tapping which is engaged on a screw mounted at the end of the motor shaft 33.
• the disk 30 is integral with the pusher 3.4 of the first embodiment or 1 0 of the second embodiment of the active latch of the invention.
• the disc 39 is provided with a bore which is mounted on a bearing 34 mounted on the shaft 33 so that the disc 39 is free on this motor shaft.
• the disc 39 is secured to the rocker bolt 2 of the first realisation mode or 1 1 of the second embodiment of the active lock of the invention.
• the motor shaft 33 is driven by an electric motor 32.
• the electric motor 32 is activated using a programmed controller which cooperates with position sensors of the different parts, namely the tilting bolt and the pusher (not shown) of either of the embodiments described above of the active latch of the invention.
• the bearing 34 is integral with the fixed structure on which the active lock is attached.
• the two discs 30 and 39 are spaced from each other by a plurality of springs as is known in the art of interconnection.
• the rocking bolt is in the closed position which blocks the mobile structure as the sliding cover of the thrust reverser during flight.
• the electric motor 32 associated with the means of mobilizing the active latch is actuated to mobilize the disk 30 which is movable by its thread on the end screw of the motor shaft.
• the disk 30 carrying the claws 35 still disengaged from the claws 36 of the disk 39 associated with the rocker bolt makes it possible to compress the springs arranged between the two disks 30 and 39.
• FIGS. 6a and 6b show a second embodiment of the mobilization means of the active latch of the invention.
• a first disk 40 is mounted on an axis 46 and integral with the rocker bolt 2 or 1 1 of the active latch.
• a second disk 41 is also mounted on the axis 46.
• a third fixed disk 45 mounted on the axis 46 carries one or more pins not shown which will be described later.
• the first disk 40 secured to the rocker bolt is pierced right through a groove 44 into which a cam 42 which is integral with the second disk 41 and integral with the pusher 3,4 or 10 of the active latch.
• Drug 42 is pushed towards the groove 44 of the first disc 40 by a spring 43 installed between the bottom of a housing of the second disc 41 in which is installed the cam 42 and the opposite face of the cam 42.
• FIG. 7 there are shown 4 successive states of (a) to (d) of the active latch mobilization means in this second embodiment described in FIGS. 6a and 6b.
• the first disc 40 and its groove 44 intercept a fixed part constituted by one of the lugs integral with the disc 45 (FIG. 6b) which makes it possible to disengage the cam 42 from the groove 42, which has the effect of releasing the pusher returning to its rest position when the motor of the mobilization means of the active latch integral with the axis 46 starts in the other direction F4.
• FIGS. 8a to 8c show three successive states of a third embodiment of the active latch mobilization means according to one or other of the two embodiments of the active latch represented in FIGS. 1 to 4.
• side view of one of the three views of Figures 8a to 8c is shown in Figure 9.
• the disengageable connection between the electric motor and the pusher or the rocker bolt is effected by means of a toothed sector disposed on a wheel integral with the pusher.
• Two coaxial shafts are associated 50 respectively at the pusher and 51 at the tilting bolt.
• a wheel 52 is mounted on the shaft associated with the pusher 50. It has a toothed sector 56. It is briefly meshing with a toothed wheel 53 whose toothing 57 is complete.
• This wheel 53 is mounted on a shaft secured to a wheel 55 having a complete toothing geared to the complete toothing of a last wheel 54 integral with the shaft 51 associated with the rocking bolt.
• the active latch is in the closed position.
• the mobilization means of the active lock is associated with an electric motor which makes it possible to set the wheel 52 in rotation in the direction H1, while the wheel 53 rotates in the direction G 1.
• the pusher is activated (3, 4, Figures 1a and following; 3a and following).
• the rocker bolt (2, Figures 1; 1 1 Figures 3) being integral with the shaft 51, disengages the locking interface of the movable structure, as the sliding cover of the thrust reverser.
• the electric motor associated with the active latch mobilization means in this third embodiment, is coupled by a gear to one of the gears 53 or 55 by applying a reduction ratio determined by the sizing of the application.
• the position and the extent of the toothed sector 56 on the wheel 52 associated with the pusher are determined according to the desired relative movements of the pusher and the rocker bolt.
• the elastic return means of the pusher make it possible to mobilize the mobilization means of the active latch in the opposite direction applied by the electric motor so that, in the absence of torque applied by this motor, the mobilization means is reversible. .

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Aviation & Aerospace Engineering (AREA)
• Lock And Its Accessories (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)
• Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
• Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=47833198

Family Applications (1)

Country Status (8)

Families Citing this family (4)

Family Cites Families (8)

• 2012
  • 2012-11-28 FR FR1261332A patent/FR2998619B1/fr active Active
• 2013
  • 2013-11-27 BR BR112015008479A patent/BR112015008479A2/pt not_active IP Right Cessation
  • 2013-11-27 CN CN201380062106.8A patent/CN104813015A/zh active Pending
  • 2013-11-27 WO PCT/FR2013/052871 patent/WO2014083278A1/fr not_active Ceased
  • 2013-11-27 CA CA2888639A patent/CA2888639A1/fr not_active Abandoned
  • 2013-11-27 RU RU2015125521A patent/RU2015125521A/ru unknown
  • 2013-11-27 EP EP13808118.7A patent/EP2925992A1/de not_active Withdrawn
• 2015
  • 2015-05-05 US US14/704,267 patent/US20160208740A1/en not_active Abandoned

Non-Patent Citations (1)

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