EP2620738B1 - Steering section for guided munition - Google Patents

Steering section for guided munition Download PDF

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Publication number
EP2620738B1
EP2620738B1 EP13152424.1A EP13152424A EP2620738B1 EP 2620738 B1 EP2620738 B1 EP 2620738B1 EP 13152424 A EP13152424 A EP 13152424A EP 2620738 B1 EP2620738 B1 EP 2620738B1
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EP
European Patent Office
Prior art keywords
locking
pyrotechnic
piston
diameter
axis
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.)
Not-in-force
Application number
EP13152424.1A
Other languages
German (de)
French (fr)
Other versions
EP2620738A1 (en
Inventor
Patrick Cohe
Bertrand Dubois
Fabien Moreau
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.)
TDA Armements SAS
Original Assignee
TDA Armements SAS
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Filing date
Publication date
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Publication of EP2620738A1 publication Critical patent/EP2620738A1/en
Application granted granted Critical
Publication of EP2620738B1 publication Critical patent/EP2620738B1/en
Not-in-force legal-status Critical Current
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
    • F42B10/02—Stabilising arrangements
    • F42B10/14—Stabilising arrangements using fins spread or deployed after launch, e.g. after leaving the barrel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
    • F42B10/60—Steering arrangements
    • F42B10/62—Steering by movement of flight surfaces
    • F42B10/64—Steering by movement of flight surfaces of fins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
    • F42B10/02—Stabilising arrangements
    • F42B10/14—Stabilising arrangements using fins spread or deployed after launch, e.g. after leaving the barrel
    • F42B10/18—Stabilising arrangements using fins spread or deployed after launch, e.g. after leaving the barrel using a longitudinally slidable support member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
    • F42B10/02—Stabilising arrangements
    • F42B10/14—Stabilising arrangements using fins spread or deployed after launch, e.g. after leaving the barrel
    • F42B10/20—Stabilising arrangements using fins spread or deployed after launch, e.g. after leaving the barrel deployed by combustion gas pressure, or by pneumatic or hydraulic forces

Definitions

  • the invention relates to missiles and guided munitions equipped with a driving section such as guided artillery ammunition and including guided rockets.
  • a driving section is known from EP 0 354 088 .
  • guided munitions can be equipped with a pilot section with guide vanes commonly called ducks or control surfaces.
  • the munition guided during its flight to a target is controlled by an electronic guide / control of the ammunition servoing the position of the control surfaces via a motorization type electric, pneumatic or pyrotechnic.
  • the guided munitions are fired from a launch tube such as, a rocket launcher, a barrel or a mortar tube.
  • the launching of the guided munition has at least two main phases, a firing phase producing its ejection of the launching tube followed by an external ballistic phase after its exit from the launch tube to go towards a target.
  • the guiding / driving section of the guided munition comprises a control system control surfaces that must be contained in the launch tube during the firing phase.
  • the control surfaces are in a retracted position in the launch tube to deploy during the outer ballistic phase, that is to say after the exit of the ammunition launch tube.
  • the deployment of the control surfaces of the guided munition is of umbrella type opening either in the direction of launch of the munition against the aerodynamic wind produced by the speed of the ammunition or in the opposite direction of launch of the ammunition
  • control system of the control surfaces ensures, firstly, their restraint in their retracted position allowing the introduction of the ammunition in the launch tube and, secondly, their deployment after the exit of the tube
  • the deployment of the control surfaces can be achieved either by a mechanism operating automatically as soon as the munition is ejected, that is to say, as soon as the pilot section is out of the launch tube without the need for a specific order of deployment sent by the control electronics of the control surfaces, or by another mechanism deploying the control surfaces that when receiving one or more orders transmitted by the control electronics to the control surface control system at a desired moment of the trajectory phase or external ballistic phase of the munition.
  • the control system of the control surfaces must be able to be configured so that, when the ammunition of the launch tube is released, the electronics, with a single command sent by the control electronics simultaneously authorize the unlocking of the control restraint system and their deployment.
  • a first order sent by the guidance / control electronics to the control system of the control surfaces will allow their unlocking, a second order following the first trigger their deployment.
  • control surface control system must also have a speed of execution compatible with the most swift ammunition, withstand shotgun type environments, it must be able to be integrated in small ammunition and be reversible for opening tests. of the governes.
  • the locking barrel comprises in a central portion between its two ends an inner wall in a plane perpendicular to the axis AA 'having a circular passage axis coinciding with the axis AA' to form between the free edge of the barrel of locking a circular section of cell having a movable portion of the locking device.
  • the movable portion of the locking device comprises between the free edge and the inner wall of the locking barrel a return spring compressed by a locking piston having a first piston surface of diameter D6 that can slide in the cell the locking barrel, the first piston surface being connected by a frustoconical intermediate surface to a second piston surface of diameter D7 smaller than the diameter D6 of the first surface of the locking piston,
  • the translation locking device comprises locking holes in the circular wall of the locking barrel regularly distributed about the axis AA 'in a plane perpendicular to said axis AA', locking balls inserted in the locking holes of diameter greater than the thickness of the circular wall of the locking barrel, a groove on the side of the inner surface of the mobile sheath, in a so-called locked position of the locking mechanism, the locking balls inserted into the holes locking of the circular wall of the locking barrel in contact with the first piston surface of diameter D6 are partially inserted into the groove of the mobile sheath blocking in translation the mobile sheath on the fixed sheath.
  • the coil spring in the so-called locked position of the locking mechanism, is compressed between the flange of the movable sleeve and the latch wall of the latch support, the coil spring being relaxed upon deactivation of the latching device. bringing the free end of the mobile sheath closer to the fixed sheath.
  • the coil spring in the so-called locked position of the locking mechanism, is compressed between the flange of the mobile sheath and the fixing ring of the fixed sleeve, the coil spring, while relaxing during the deactivation of the locking device. , moving the free end of the mobile sheath away from the fixed sheath.
  • the locking piston of the movable part comprises, on the side of the circular passage of the inner wall of the locking barrel, an application surface of the unlocking force F for compressing the return spring and placing, in a first unlocking phase of the locking mechanism, the second diameter surface D7 of the locking piston facing the locking balls which, by withdrawing from the groove of the inner surface of the mobile sheath, allow the translation of the mobile sheath on the locking barrel by the releasing the helical spring release, in a final unlocking phase, releasing the n control surfaces and allowing their passage from the folded position to the deployed position.
  • the locking barrel comprises another cell between the inner wall of the locking barrel and the fastening ring integral with the latch support, the other cavity opening through the fastening ring containing a device for generating the force. Unlocking F secured to the steering section body.
  • the device for generating the unlocking force F is a pyrotechnic device.
  • the pyrotechnic device comprises, a pyrotechnic tube of circular section that can slide in the other cell, the pyrotechnic tube being closed, on the side of the inner wall of the locking barrel, by a pyrotechnic tube wall comprising a circular opening of diameter D9 and, on the other side of the pyrotechnic tube by another closing wall of circular section of diameter D10 greater than the diameter D8 of the pyrotechnic tube.
  • the other closure wall of the pyrotechnic device is extended by a cylindrical body of diameter D12 smaller than the diameter of the other closure wall to create a crown-shaped bearing surface for a ring clamping threaded on its periphery having a passage in its axis of revolution for the passage, to through said clamping ring, the cylindrical body of the pyrotechnic device.
  • the pyrotechnic tube comprises, between the pyrotechnic tube wall having the circular opening and the other closure wall, a pyrotechnic piston that can slide sealingly in the pyrotechnic tube, the pyrotechnic piston being reduced in diameter to passing through the circular opening of the pyrotechnic tube wall, an igniter and a pyrotechnic charge forming with the pyrotechnic piston a pyrotechnic chamber, a toroidal seal surrounding the pyrotechnic piston sealing the pyrotechnic chamber.
  • the pyrotechnic piston is in contact, by the application surface of the unlocking force F, with the locking piston in the locking barrel of the fixed sleeve so that said locking piston in the cell does not not in direct contact with the inner wall of the locking barrel, a direct contact pressure between the locking piston in the cell and the pyrotechnic piston of the pyrotechnic device being exerted by the return spring compressed between the closing ring integral with the free end of the locking barrel and the locking piston in the cell.
  • the device for generating the unlocking force F is an electromagnetic device such as an electromagnet.
  • the device for generating the unlocking force F is a pneumatic device.
  • the invention also relates to a tool for resetting the locking of the locking mechanism of the driving section, when the coil spring between the flange of the movable sleeve and the latch wall of the latch support is expanded and the flange of the movable sleeve is in abutment.
  • the locking mechanism comprising a series of axis parallel to the axis XX 'holes through the fixing ring of the fixed sheath distributed regularly around the axis AA 'and opening at the height of the flange of the movable sheath, characterized in that it comprises a handle having cylindrical rods secured to the handle distributed on said handle so that a rod passes in a respective hole of the fixing ring, a pressure exerted on the handle transmitted by the rods on the flange compressing the helical locking spring to perform the rearming of the locking device.
  • the invention also relates to a tool for resetting the locking of the locking mechanism of the driving section, when the coil spring is compressed between the collar of the mobile sheath and the fixing ring of the fixed sheath, the collar of the mobile sheath comprising a series of threaded holes of axes parallel to the axis XX 'regularly distributed around the axis AA', characterized in that it comprises a handle having cylindrical rods integral with one of its ends of said handle, the other free ends rods being threaded to be screwed onto the threaded holes of the collar of the movable sheath and make them integral with the handle, a traction force being exerted on the handle to bring, during rearming, the mobile sheath towards the fixing ring in compressing the coil spring to reset the locking device.
  • the driving section according to the invention advantageously meets the requirements thanks to a robust and compact mechanism, equipped with an exchangeable pyrotechnic device.
  • the new driving section according to the invention provides an improvement in robustness and compaction with respect to the control devices of the state of the art.
  • the figure 1a represents a partial view of a driving section of a guided munition comprising a control locking mechanism, according to the invention.
  • the figure 1b represents a partial front view of the driving section of the figure 1 at.
  • a locking mechanism 60 maintains the four control surfaces in the folded position in the control body 50 during the firing phase. The deactivation of the locking mechanism 60 frees the four control surfaces which can then be put in their deployed position.
  • the four control surfaces in this realization of the figure 1a , are of the same rectangular shape with small sides c1, c1 'opposite and long sides c2, c2' opposite. In the folded position of the control surfaces, at least the long sides c2, c2 'are parallel to the axis XX'.
  • the four control surfaces can pivot, on the side of one of their small side c1 farthest from the locking mechanism 60, around a respective rotary shaft 54 of axis VV 'perpendicular to a plane passing through the longitudinal axis XX .
  • the figure 1a shows the two control surfaces G1, G3 in a plane P1 passing through the longitudinal axis XX '.
  • the small ribs c1, c1 'opposite of the four control surfaces G1, G2, G3, G4 comprise, as represented on the figure 1b , on the side of the locking mechanism 60, respective notches e1, e2, e3, e4 distributed around a circle Ce of notches whose center is on the longitudinal axis XX 'for locking by the locking mechanism 60 of the four control surfaces in the folded position in the steering body.
  • the figure 2 shows a detailed view of the locking mechanism of the control surfaces of the control section of the figure 1a including a pyrotechnic device.
  • the locking mechanism 60 comprises a latch support 62 in the form of a tube of circular section integral with the control body 50, axis of revolution AA 'coincides with the longitudinal axis XX', a fixed sheath 64 integral with the latch support 62 also of cylindrical shape with an axis of revolution AA 'coincides with the longitudinal axis XX', a movable sheath 66 slidable on the fixed sheath, a locking device in translation maintaining in longitudinal position the sheath mobile on the fixed sheath, a coil spring 150 for unlocking around the sheath mobile 66 to slide the movable sheath on the fixed sheath when disabling the locking device.
  • the latch support 62 has a circular cylindrical inner support surface 68 of diameter D1.
  • the latch support 62 widens in diameter, at its end farthest from the control surfaces, in the form of a lock support ring 74 having threaded holes 76 distributed regularly around the axis AA '.
  • the latch support 62 is closed at its other end by a latch wall 80 having in the axis AA 'a circular latch opening 82 of diameter D2 less than the diameter D1.
  • the latch wall 80 forms, on the side of the internal support surface 68 of the latch support 62, a bearing surface 86 in the form of a ring in a plane perpendicular to the axis AA '.
  • the fixed sheath 64 has two opposite ends in the axis AA '.
  • One of the ends of the fixed sheath has a fixing ring 100 on the lock support ring 74 in a plane perpendicular to the axis AA 'having attachment holes 102 facing the threaded holes 76 of the lock support ring 74 for the fixing screw passage 104 of the fixed sheath 64 on the latch support 62.
  • the fixed sheath 64 is extended, inside the latch support 62, by a tube-shaped locking barrel 110 passing through the circular latch opening 82 of the latch support 62, of axis of revolution coinciding with the latch 62.
  • the locking of the four control surfaces is carried out by the movable sleeve 66 of the locking mechanism 60.
  • the movable sheath 66 is in the form of a tube of circular section of external diameter D4 surrounding the locking barrel 110 and able to slide longitudinally along the axis AA ' by its inner surface 122 on the outer surface 123 of the locking barrel 110 and by its outer surface 124 of diameter D4 in the latch opening 82 of the latch wall 80 of the latch support 62.
  • the movable sheath 66 comprises, on the side of the lock opening 82 outside the fixed sheath 64, a free end 130 inserted into the notches e1, e2, e3, e4 of the four control surfaces to hold them in their seat. folded position in the control body 50 and another end 132 opposite the free end 130 of the mobile sheath inside the latch support 62 having a collar 140 of diameter D5 greater than the diameter D4 of the outer surface 124 of the sheath mobile 66, said flange 140 facing the bearing surface 86 of the latch support 62 and slidable on the inner support surface 68 of the latch support 62.
  • the locking mechanism 60 of the control surfaces is deactivated by an unlocking force F acting on the locking device in translation of the mobile sheath 66 to allow its translation by sliding on the locking barrel 110 and the unlocking of the four control surfaces which can then pass from their folded position to their deployed position.
  • the unlocking coil spring 150 in the locked position of the mechanism, is compressed between the bearing surface 86 in the form of a ring and the collar 140 facing the latch wall 80 of the latch support 62. The decompression of the coil spring disengages the free end 130 of the mobile sheath 66 notches e1, e2, e3, e4 releasing the four control surfaces.
  • the locking barrel 110 comprises, in a central part between its two ends, an inner wall 160 in a plane perpendicular to the axis AA 'having a circular passage 164 of axis of revolution coinciding with the axis AA' to form between the end of the locking barrel 110 on the free end 130 side of the mobile sheath 66 and said inner wall 164 a circular section honeycomb 170 comprising a movable portion of the translation locking device intended to be actuated by the unlocking force F .
  • Said mobile part in the cell 170 comprises, on the side of the free edge 172 of the locking barrel closed by a closure ring 202 integral with said free edge 172, a bearing washer 173 and a return spring 174 compressed by a piston of locking 176 on the closure ring 202.
  • the locking piston 176 has a first circular cylindrical surface 180 of diameter D6 slidable inside the locking barrel 110, the first surface 180 being connected by an intermediate surface 182 of frustoconical shape. to a second surface 184 of diameter D7 smaller than the diameter D6 of the first external surface 180 of the locking piston,
  • the translation locking device comprises locking holes 190 in the circular wall of the locking barrel 110 regularly distributed about the axis AA 'and, in a plane perpendicular to said axis AA', locking balls 194 inserted into the locking holes 190, the balls being of diameter greater than the thickness of the circular wall of the locking barrel 110 so as to partially exceed the outer surface of the locking barrel 110 to fit in a groove 200 of circular section in the wall of the mobile sheath 66.
  • the cell 170 of the fixed sleeve 110 opens through the circular passage 164 to another cell 210 of circular cylindrical shape with a diameter D8 of axis of revolution coincides with the axis AA 'opening through the fixing ring 100 of the fixed sheath 64
  • This other cell 210 contains, in this embodiment, a pyrotechnic device 220 for generating the unlocking force F on the locking piston 176 of the locking mechanism.
  • the pyrotechnic device 220 comprises, a pyrotechnic tube 222 of circular section that can slide in the other cell 210.
  • the pyrotechnic tube is closed, on the side of the inner wall 160 of the locking barrel 110, by a pyrotechnic tube wall 224 comprising a circular opening 226 of diameter D9 and, on the other side of the pyrotechnic tube 222 by another closing wall 230 of circular section of diameter D10 greater than the diameter D8 of the pyrotechnic tube.
  • the other closure wall 230 is extended by a cylindrical body 231 of diameter D12 smaller than the diameter of the other closure wall 230 to create a bearing surface 232 in the form of a ring for a clamping ring 234.
  • the clamping ring 234 is threaded on its periphery and has a passage 235 in its axis for the passage of the cylindrical body 231 of the pyrotechnic device 220.
  • the pyrotechnic tube 222 comprises, between the pyrotechnic tube wall 224 comprising the circular opening 226 and the other closure wall 230, a pyrotechnic piston 240 that can slide in a sealed manner in the pyrotechnic tube 222, the pyrotechnic piston 240 being reduced to diameter to pass through the circular opening 226 of the pyrotechnic tube wall, an igniter 250 and a pyrotechnic charge 252 forming with the pyrotechnic piston 240 a pyrotechnic chamber 260.
  • the other cell 210 of circular cylindrical shape of diameter D8 opens through the fixing ring 100 of the fixed sheath 64 by a ring-shaped recess 270 of circular section with a diameter greater than the diameter of the closure wall 230 of the pyrotechnic tube creating a shoulder of crown 272.
  • the closing wall 230 of the pyrotechnic tube abuts the crown shoulder 272.
  • the screwing of the clamping ring 234 threaded on the internal thread of the recess of crown 270 ensures a blocking of the pyrotechnic device in the other cell 210 of the locking gun 110.
  • the figure 3 shows the locking mechanism of the figure 2 in locked position
  • the figure 3 shows the pyrotechnic device 220 locked in the other cell 210 of the locking barrel 110 of the locking mechanism by the clamping ring 234 screwed into the threaded recess of the fixing ring 100.
  • Electrical contacts 280 passing through the cylindrical body 231 provide electrical activation of the igniter 250 of the pyrotechnic device by an external device for triggering the unlocking (not shown in the figures).
  • the external device can also control, when the control surfaces are released, their deployment at a chosen moment of the flight of the guided munition.
  • the deployment of the four control surfaces can also be realized automatically when they are released.
  • the electrical activation of the igniter 250 and the pyrotechnic charge 252 produce, by the gas pressure released in the pyrotechnic chamber 260, the movement of the pyrotechnic piston 240 towards the outside of the pyrotechnic chamber and the generation by said pyrotechnic piston an unlocking force F on the application surface 113 of the unlocking force of the locking piston 176.
  • the locking mechanism shown in figure 3 , is in the locking position of the four control surfaces G1, G2, G3, G4 in their folded position in the control body 50.
  • the pyrotechnic device 220 is inserted and held in position in the other cell 210 of the locking gun 110, by the clamping ring 234 screwed into the threaded recess 270 of the fixing ring 100.
  • the pyrotechnic piston 240 is in direct contact with the locking piston 176 in the locking barrel 110 of the fixed sheath 64 of so that said locking piston 176 in the cell 170 is not in direct contact with the inner wall 160 of the locking barrel 110, a direct contact pressure between the locking piston 176 in the cell 170 and the pyrotechnic piston 240 the pyrotechnic device being exerted by the return spring 174 compressed between the closure ring 202 integral with the free end 172 of the locking barrel and the piston of the lock screen 176 in the cell 170.
  • the figure 4 shows the locking mechanism of the figure 2 in a first unlocking phase.
  • Activation of the igniter 250 and the pyrotechnic charge 252 produces a gas pressure in the pyrotechnic chamber 260 and an unlocking force F exerted by the pyrotechnic piston 240 on the locking piston 176 which moves towards the free edge 172 of the locking barrel 110 by compressing the return spring 174.
  • the second surface 184 of the locking piston 176 moved by the thrust of the pyrotechnic piston 240 is opposite the locking balls 194.
  • the figure 5 shows the locking mechanism of the figure 2 in a second unlocking phase.
  • the locking balls 194 guided by the locking holes 190 can, in this second phase, be positioned on the second surface 184 of the smaller diameter locking piston 176 D7 then disengaging from the groove 200 of the mobile sheath which is then released.
  • the coil spring 150 as it depresses moves the movable sleeve (66) inwardly of the lock bracket 62.
  • the figure 6 shows the last unlocking phase of the locking mechanism of the figure 2 .
  • the movement of the movable sheath 66 continues towards the interior of the latch support 62 until it comes to a stop by its flange 140 on an internal shoulder 245 of the fixing ring 100 inside the latch support 62 as represented to the figure 6 .
  • the free end 130 of the mobile sleeve 66 is disengaged from the notches e1, e2, e3, e4 of the four control surfaces which are then released in rotation about their axis 54.
  • the return spring 174 is compressed by the locking piston 176 itself pushed by the pyrotechnic piston 240 in the locking barrel 110.
  • the locking piston 176 is, in this last phase, locked in displacement in the cell 170 by the locking balls maintained between the inner surface 122 of the movable sheath 66 and the surfaces, frustoconical intermediate 182 and second surface 184 of diameter D7 of the locking piston 176.
  • control surfaces being released can then rotate around their shaft 54 to move into the deployed position.
  • the figure 7 shows the locking device of the figure 2 in the unlocked position and the control surfaces being deployed.
  • An electronic control system of the steering section system not shown in the figures ensures the initiation of the exciter of the pyrotechnic pyrotechnic exchangeable via its two power pins 280.
  • the figure 8 shows the dismantling of the pyrotechnic device of the locking mechanism of the figure 2 .
  • the pyrotechnic device is interchangeable and therefore independent of the locking system, which allows its removal or replacement at any time. Once used for triggering the locking mechanism, simply unscrew the clamping ring 234 of the fixing ring 100 to extract the pyrotechnic device used from the other cell 210 of the locking barrel 110 and possibly replace it with a new one. .
  • the invention also relates to a device for resetting the locking of the locking mechanism of the driving section according to the invention.
  • the figure 9 shows a device for resetting the locking mechanism of the steering section of the figure 2 .
  • the locking mechanism comprises a series of holes 300 of axes parallel to the axis XX 'passing through the fixing ring 100 of the fixed sheath 64 distributed regularly around the axis AA' and opening at height of the flange 140 of the mobile sheath 66 and a resetting tool 310.
  • the resetting tool 310 essentially comprises a handle 320 having cylindrical rods 322 integral with the handle 320 distributed on the handle so that a rod can pass into one of the holes facing in the fixing ring 100.
  • control surfaces are brought back or put in the folded position.
  • the figure 9 shows a first phase of rearming the locking mechanism of the figure 2 .
  • the rods 322 passing through the holes 300 of the fixing ring of the fixed sheath bear against the flange 140 of the mobile sheath 66 compressing the helical spring 150 around the mobile sheath 66 and sliding the movable sheath 66 onto the locking barrel 110 fixed sheath 64.
  • the figure 10 shows the last phase of rearming of the locking mechanism of the steering section of the figure 2 .
  • the figures 11 and 12 show a variant of the locking mechanism of the driving section according to the invention.
  • the figure 11 shows the unlocking device in the locked position and the figure 12 in unlocked position.
  • the unlocking of the control surfaces is achieved by a displacement of the movable sleeve 66 in the opposite direction to that of the displacement of the movable sleeve of the figure 1a .
  • the helical spring 150 is compressed between the flange 140 of the mobile sheath and the fixing ring 100 of the fixed sheath 64.
  • the coil spring 150 being released relaxes by pushing the movable sheath 66 towards the outside of the latch support 62.
  • the free end 130 of the movable sheath 66 cooperates with the four control surfaces by an intermediate mechanism, not shown in the figures, to release them.
  • the flange 140 of the movable sleeve comprises a series of threaded holes 400 of axes parallel to the axis XX 'distributed regularly around the axis AA' and opening at the height of the collar of the movable sleeve 66 and a reset tool.
  • the reset tool essentially comprises a handle having cylindrical rods integral with one end of the handle, the other free ends of the rods being threaded to screw on the threaded holes of the collar of the mobile sheath.
  • control surfaces are brought back or put in the folded position, then a sufficient traction force is exerted on the handle to bring the movable sheath 66 back to the fixing ring by compressing the coil spring 150 until the locking ball 194 returns.
  • a sufficient traction force is exerted on the handle to bring the movable sheath 66 back to the fixing ring by compressing the coil spring 150 until the locking ball 194 returns. in the groove 200 of the wall of the mobile sheath, as in the case of the production of figures 9 and 10 for compressing the coil spring 150 and sliding the movable sleeve 66 on the locking barrel 110 of the fixed sleeve 64 to the locking position of the locking device.
  • the invention is not limiting to a given number of rudders and can be used in steering sections having n control surfaces G1, G2,..., Gn, where g is the index of the rudder, n being greater than 1.
  • the device generating the unlocking force F can be obtained by different devices and is not limited to a pyrotechnic device, for example the unlocking force F can be generated by an electromagnetic device, pneumatic device or any other device which leads to generating a force applied to the locking piston 176 of the locking barrel.
  • control surfaces locking device which is of revolution and reduced dimensions, is advantageously very compact.
  • the locking device allows, when in the locked position, to withstand the strong acceleration phase during the gun.
  • the locking piston in the cell of the locking barrel bears against the pyrotechnic piston if the acceleration is of the "cannon" type, said locking piston 176 in addition to pressing on the pyrotechnic piston can come in double support on the inner wall 160 of the locking barrel 110 of the fixed sheath 64.
  • the locking device of the driving section according to the invention is robust, fast and has an instantaneous type of operation thanks to the use of an exchangeable pyrotechnic device but also thanks to the helical release spring which has a stored energy requiring only to relax.
  • the locking device is reversible thanks to the frustoconical intermediate surface of the locking piston in the locking barrel which, under the action of the return spring, tends to reposition the locking balls in the groove of the mobile sheath when the latter it is opposite blocking balls
  • the locking device is adaptable to all umbrella type opening systems.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Lock And Its Accessories (AREA)

Description

L'invention concerne les missiles et les munitions guidées équipées d'un tronçon de pilotage tels que les munitions d'artillerie guidées et notamment les roquettes guidées. Un tel tronçon de pilotage est connu du EP 0 354 088 .The invention relates to missiles and guided munitions equipped with a driving section such as guided artillery ammunition and including guided rockets. Such a driving section is known from EP 0 354 088 .

Tout comme les missiles, les munitions guidées peuvent être équipées d'un tronçon de pilotage comportant des ailettes de guidage appelées communément canards ou gouvernes. La munition guidée pendant son vol vers une cible est pilotée grâce à une électronique de guidage/pilotage de la munition asservissant la position des gouvernes via une motorisation de type électrique, pneumatique ou pyrotechnique.Like missiles, guided munitions can be equipped with a pilot section with guide vanes commonly called ducks or control surfaces. The munition guided during its flight to a target is controlled by an electronic guide / control of the ammunition servoing the position of the control surfaces via a motorization type electric, pneumatic or pyrotechnic.

D'une façon générale les munitions guidées sont tirées à partir d'un tube de lancement tels que, un lance-roquettes, un canon ou un tube de mortier. Le lancement de la munition guidée présente au moins deux phases principales, une phase de tir produisant son éjection du tube lanceur suivie d'une phase balistique externe après sa sortie du tube de lancement pour se diriger vers une cible.In general, the guided munitions are fired from a launch tube such as, a rocket launcher, a barrel or a mortar tube. The launching of the guided munition has at least two main phases, a firing phase producing its ejection of the launching tube followed by an external ballistic phase after its exit from the launch tube to go towards a target.

Le tronçon de guidage/pilotage de la munition guidée comporte un système de contrôle des gouvernes qui doivent être contenues dans le tube de lancement lors de la phase de tir. Les gouvernes sont dans une position rétractée dans le tube de lancement pour se déployer durant la phase balistique externe, c'est-à-dire après la sortie de la munition du tube de lancement. Généralement le déploiement des gouvernes de la munition guidée est de type ombrelle s'ouvrant soit dans le sens de lancement de la munition contre le vent aérodynamique produit par la vitesse de la munition ou soit dans le sens inverse de lancement de la munitionThe guiding / driving section of the guided munition comprises a control system control surfaces that must be contained in the launch tube during the firing phase. The control surfaces are in a retracted position in the launch tube to deploy during the outer ballistic phase, that is to say after the exit of the ammunition launch tube. Generally the deployment of the control surfaces of the guided munition is of umbrella type opening either in the direction of launch of the munition against the aerodynamic wind produced by the speed of the ammunition or in the opposite direction of launch of the ammunition

Le système de contrôle des gouvernes assure, d'une part, leur retenue dans leur position rétractée permettant l'introduction de la munition dans le tube de lancement et, d'autre part, leur déploiement après la sortie du tubeThe control system of the control surfaces ensures, firstly, their restraint in their retracted position allowing the introduction of the ammunition in the launch tube and, secondly, their deployment after the exit of the tube

Le déploiement des gouvernes peut être réalisé, soit par un mécanisme fonctionnant automatiquement dès l'éjection de la munition, c'est-à-dire, dès que le tronçon de pilotage est sorti du tube de lancement sans besoin d'un ordre spécifique de déploiement envoyé par l'électronique de commande des gouvernes, soit par un autre mécanisme déployant les gouvernes que lors de la réception d'un ou plusieurs ordres transmis par l'électronique de commande au système de contrôle des gouvernes à un moment souhaité de la phase trajectoire ou phase balistique externe de la munition. Pour être compatible avec ces deux fonctionnements, le système de contrôle des gouvernes doit pouvoir être configuré pour que, lors de la sortie de la munition du tube de lancement, l'électronique, avec un seul ordre envoyé par l'électronique de commande autorise simultanément le déverrouillage du système de retenue des gouvernes et leur déploiement. Dans une autre configuration du système de contrôle des gouvernes un premier ordre envoyé par l'électronique de guidage/pilotage au système de contrôle des gouvernes autorisera leur déverrouillage, un second ordre suivant le premier déclenchant leur déploiement.The deployment of the control surfaces can be achieved either by a mechanism operating automatically as soon as the munition is ejected, that is to say, as soon as the pilot section is out of the launch tube without the need for a specific order of deployment sent by the control electronics of the control surfaces, or by another mechanism deploying the control surfaces that when receiving one or more orders transmitted by the control electronics to the control surface control system at a desired moment of the trajectory phase or external ballistic phase of the munition. In order to be compatible with these two operations, the control system of the control surfaces must be able to be configured so that, when the ammunition of the launch tube is released, the electronics, with a single command sent by the control electronics simultaneously authorize the unlocking of the control restraint system and their deployment. In another configuration of the control system of the control surfaces a first order sent by the guidance / control electronics to the control system of the control surfaces will allow their unlocking, a second order following the first trigger their deployment.

Le système de contrôle des gouvernes doit aussi avoir une rapidité d'exécution compatible des munitions les plus véloces, résister aux environnements de tir type coup canon, il doit pouvoir être intégré dans des munitions de faible calibre et être réversible pour les tests d'ouverture des gouvernes.The control surface control system must also have a speed of execution compatible with the most swift ammunition, withstand shotgun type environments, it must be able to be integrated in small ammunition and be reversible for opening tests. of the governes.

Néanmoins, les tronçons de pilotage de l'état de l'art ne présentent pas une compacité et une robustesse suffisante pour équiper les munitions guidées de plus en plus performantes.Nevertheless, the state-of-the-art steering sections do not have sufficient compactness and robustness to equip the increasingly efficient guided munitions.

L'invention propose un tronçon de pilotage pour munition guidée comportant, un corps de pilotage ayant une surface externe de forme cylindrique selon un axe longitudinal XX', n gouvernes G1, G2,...Gi,...Gn autour de l'axe longitudinal XX' pouvant être, soit dans une position repliée dans le corps de pilotage, soit dans une position déployée dépassant de la surface externe du corps de pilotage, n étant un nombre entier supérieur à 1, pour réaliser le guidage de la munition,
caractérisé en ce qu'il comporte un mécanisme de verrouillage des n gouvernes en position repliée dans le corps de pilotage, ledit mécanisme de verrouillage ayant

  • un support de verrou en forme de tube solidaire par un côté du corps de pilotage, d'axe de révolution AA' confondu avec l'axe longitudinal XX', fermé, à son extrémité proche des n gouvernes, par une paroi de verrou comportant, dans l'axe AA' une ouverture de verrou de diamètre D2 inférieur au diamètre D1 de la surface interne cylindrique du support de verrou, pour former, à l'intérieur du support de verrou, une surface d'appui en forme de couronne,
  • un fourreau fixe de forme cylindrique d'axe de révolution AA' confondu avec l'axe longitudinal XX' comportant, une couronne de fixation dans un plan perpendiculaire à l'axe AA' solidaire du support de verrou par le côté opposé à la paroi de verrou, un canon de verrouillage en forme de tube de section circulaire de diamètre extérieur D3 passant par l'ouverture de verrou et ayant un bord libre à l'extérieur du support de verrou,
  • un fourreau mobile en forme de tube de section circulaire de diamètre externe D4 entourant le fourreau fixe et pouvant glisser longitudinalement selon l'axe AA' par sa surface interne sur la surface externe du canon de verrouillage, le fourreau mobile comportant, du côté de l'ouverture de verrou à l'extérieur du fourreau fixe, une extrémité libre collaborant avec les n gouvernes G1, G2,...Gi,...Gn pour les maintenir dans leur position repliée dans le corps de pilotage et une autre extrémité opposée à l'extrémité libre à l'intérieur du support de verrou comportant une collerette de diamètre D5 supérieur au diamètre externe D4 du fourreau mobile,
  • un dispositif de verrouillage en translation selon l'axe AA' du fourreau mobile sur le canon de verrouillage, pouvant être désactivé par une force de déverrouillage F pour déclencher une translation par glissement du fourreau mobile sur le canon de verrouillage et la libération des n gouvernes pouvant passer de leur position repliée à leur position déployée.
  • un ressort hélicoïdal de déverrouillage autour du fourreau mobile pour faire glisser le fourreau mobile sur le fourreau fixe lors de la désactivation du dispositif de verrouillage.
The invention proposes a guide section for a guided munition comprising, a control body having an outer surface of cylindrical shape along a longitudinal axis XX ', n control surfaces G1, G2, ... Gi, ... Gn around the longitudinal axis XX 'can be either in a folded position in the control body, or in a deployed position protruding from the outer surface of the control body, n being an integer greater than 1, to carry out the guidance of the ammunition,
characterized in that it comprises a locking mechanism of the n rudders in the folded position in the control body, said locking mechanism having
  • a tube-shaped latch support integral with one side of the driving body, of axis of revolution AA 'coinciding with the longitudinal axis XX', closed, at its end close to the n control surfaces, by a latch wall comprising, in the axis AA 'a bolt opening of diameter D2 smaller than the diameter D1 of the cylindrical internal surface of the latch support, to form, inside the latch support, a bearing surface in the form of a ring,
  • a fixed sheath of cylindrical shape of axis of revolution AA 'coincides with the longitudinal axis XX' comprising, a fixing ring in a plane perpendicular to the axis AA 'integral with the latch support by the side opposite to the wall of latch, a tube-shaped locking barrel of circular section of outer diameter D3 passing through the latch opening and having a free edge outside the latch support,
  • a movable sleeve in the form of a tube of circular section of external diameter D4 surrounding the fixed sheath and being able to slide longitudinally along the axis AA 'by its internal surface on the outer surface of the locking barrel, the mobile sheath having, on the side of the bolt opening outside the fixed sleeve, a free end collaborating with the n control surfaces G1, G2, ... Gi, ... Gn to maintain them in their folded position in the driving body and another opposite end at the free end inside the latch support having a flange of diameter D5 greater than the outer diameter D4 of the movable sleeve,
  • a locking device in translation along the axis AA 'of the mobile sheath on the locking barrel, which can be deactivated by an unlocking force F to trigger a translation by sliding of the mobile sheath on the locking barrel and the release of the n control surfaces can move from their folded position to their deployed position.
  • a helical release spring around the movable sheath to slide the movable sheath on the fixed sleeve during the deactivation of the locking device.

Dans une réalisation du tronçon de pilotage, le canon de verrouillage comporte dans une partie centrale entre ses deux extrémités une paroi interne dans un plan perpendiculaire à l'axe AA' ayant un passage circulaire d'axe confondu avec l'axe AA' pour former entre le bord libre du canon de verrouillage une alvéole de section circulaire comportant une partie mobile du dispositif de verrouillage.In one embodiment of the driving section, the locking barrel comprises in a central portion between its two ends an inner wall in a plane perpendicular to the axis AA 'having a circular passage axis coinciding with the axis AA' to form between the free edge of the barrel of locking a circular section of cell having a movable portion of the locking device.

Dans une autre réalisation, la partie mobile du dispositif de verrouillage comporte entre le bord libre et la paroi interne du canon de verrouillage un ressort de rappel comprimé par un piston de verrouillage ayant une première surface de piston de diamètre D6 pouvant glisser dans l'alvéole du canon de verrouillage, la première surface de piston étant raccordée par une surface intermédiaire de forme tronconique à une deuxième surface de piston de diamètre D7 plus petit que le diamètre D6 de la première surface du piston de verrouillage,In another embodiment, the movable portion of the locking device comprises between the free edge and the inner wall of the locking barrel a return spring compressed by a locking piston having a first piston surface of diameter D6 that can slide in the cell the locking barrel, the first piston surface being connected by a frustoconical intermediate surface to a second piston surface of diameter D7 smaller than the diameter D6 of the first surface of the locking piston,

Dans une autre réalisation, le dispositif de verrouillage en translation comporte des trous de blocage dans la paroi circulaire du canon de verrouillage distribués régulièrement autour de l'axe AA' dans un plan perpendiculaire au dit axe AA', des billes de blocage insérées dans les trous de blocage de diamètre plus grand que l'épaisseur de la paroi circulaire du canon de verrouillage, une gorge du coté de la surface interne du fourreau mobile, dans une position dite verrouillée du mécanisme de verrouillage, les billes de blocage insérées dans les trous de blocage de la paroi circulaire du canon de verrouillage en contact avec la première surface de piston de diamètre D6 sont insérées partiellement dans la gorge du fourreau mobile bloquant en translation le fourreau mobile sur le fourreau fixe.In another embodiment, the translation locking device comprises locking holes in the circular wall of the locking barrel regularly distributed about the axis AA 'in a plane perpendicular to said axis AA', locking balls inserted in the locking holes of diameter greater than the thickness of the circular wall of the locking barrel, a groove on the side of the inner surface of the mobile sheath, in a so-called locked position of the locking mechanism, the locking balls inserted into the holes locking of the circular wall of the locking barrel in contact with the first piston surface of diameter D6 are partially inserted into the groove of the mobile sheath blocking in translation the mobile sheath on the fixed sheath.

Dans une autre réalisation, dans la position dite verrouillée du mécanisme de verrouillage, le ressort hélicoïdal est comprimé entre la collerette du fourreau mobile et la paroi de verrou du support de verrou, le ressort hélicoïdal en se détendant lors de la désactivation du dispositif de verrouillage rapprochant l'extrémité libre du fourreau mobile du fourreau fixe.In another embodiment, in the so-called locked position of the locking mechanism, the coil spring is compressed between the flange of the movable sleeve and the latch wall of the latch support, the coil spring being relaxed upon deactivation of the latching device. bringing the free end of the mobile sheath closer to the fixed sheath.

Dans une autre réalisation, dans la position dite verrouillée du mécanisme de verrouillage, le ressort hélicoïdal est comprimé entre la collerette du fourreau mobile et la couronne de fixation du fourreau fixe, le ressort hélicoïdal, en se détendant lors de la désactivation du dispositif de verrouillage, éloignant l'extrémité libre du fourreau mobile du fourreau fixe.In another embodiment, in the so-called locked position of the locking mechanism, the coil spring is compressed between the flange of the mobile sheath and the fixing ring of the fixed sleeve, the coil spring, while relaxing during the deactivation of the locking device. , moving the free end of the mobile sheath away from the fixed sheath.

Dans une autre réalisation, le piston de verrouillage de la partie mobile comporte, du côté du passage circulaire de la paroi interne du canon de verrouillage une surface d'application de la force de déverrouillage F pour comprimer le ressort de rappel et placer, dans une première phase de déverrouillage du mécanisme de verrouillage, la deuxième surface diamètre D7 du piston de verrouillage face aux billes de blocage lesquelles en se retirant de la gorge de la surface interne du fourreau mobile autorisent la translation du fourreau mobile sur le canon de verrouillage par la détente du ressort hélicoïdal de déverrouillage, dans une dernière phase de déverrouillage, libérant les n gouvernes et autorisant leur passage de la position repliée vers la position déployée.In another embodiment, the locking piston of the movable part comprises, on the side of the circular passage of the inner wall of the locking barrel, an application surface of the unlocking force F for compressing the return spring and placing, in a first unlocking phase of the locking mechanism, the second diameter surface D7 of the locking piston facing the locking balls which, by withdrawing from the groove of the inner surface of the mobile sheath, allow the translation of the mobile sheath on the locking barrel by the releasing the helical spring release, in a final unlocking phase, releasing the n control surfaces and allowing their passage from the folded position to the deployed position.

Dans une autre réalisation, le canon de verrouillage comporte une autre alvéole entre la paroi interne du canon de verrouillage et la couronne de fixation solidaire du support de verrou, l'autre alvéole débouchant par la couronne de fixation contenant un dispositif de génération de la force de déverrouillage F solidaire du corps de tronçon de pilotage.In another embodiment, the locking barrel comprises another cell between the inner wall of the locking barrel and the fastening ring integral with the latch support, the other cavity opening through the fastening ring containing a device for generating the force. Unlocking F secured to the steering section body.

Dans une autre réalisation, le dispositif de génération de la force de déverrouillage F est un artifice pyrotechnique.In another embodiment, the device for generating the unlocking force F is a pyrotechnic device.

Dans une autre réalisation, l'artifice pyrotechnique comporte, un tube pyrotechnique de section circulaire pouvant glisser dans l'autre alvéole, le tube pyrotechnique étant fermé, du côté de la paroi interne du canon de verrouillage, par une paroi de tube pyrotechnique comportant une ouverture circulaire de diamètre D9 et, par l'autre côte du tube pyrotechnique par une autre paroi de fermeture de section circulaire de diamètre D10 supérieur au diamètre D8 du tube pyrotechnique.In another embodiment, the pyrotechnic device comprises, a pyrotechnic tube of circular section that can slide in the other cell, the pyrotechnic tube being closed, on the side of the inner wall of the locking barrel, by a pyrotechnic tube wall comprising a circular opening of diameter D9 and, on the other side of the pyrotechnic tube by another closing wall of circular section of diameter D10 greater than the diameter D8 of the pyrotechnic tube.

Dans une autre réalisation, l'autre paroi de fermeture de l'artifice pyrotechnique se prolonge par un corps cylindrique de diamètre D12 inférieur au diamètre de la l'autre paroi de fermeture pour créer une surface d'appui en forme de couronne pour une bague de serrage filetée sur sa périphérie comportant un passage dans son axe de révolution pour le passage, à travers de ladite bague de serrage, du corps cylindrique de l'artifice pyrotechnique.In another embodiment, the other closure wall of the pyrotechnic device is extended by a cylindrical body of diameter D12 smaller than the diameter of the other closure wall to create a crown-shaped bearing surface for a ring clamping threaded on its periphery having a passage in its axis of revolution for the passage, to through said clamping ring, the cylindrical body of the pyrotechnic device.

Dans une autre réalisation, le tube pyrotechnique comporte, entre la paroi de tube pyrotechnique comportant l'ouverture circulaire et l'autre paroi de fermeture, un piston pyrotechnique pouvant glisser de façon étanche dans le tube pyrotechnique, le piston pyrotechnique se réduisant en diamètre pour passer à travers l'ouverture circulaire de la paroi de tube pyrotechnique, un inflammateur et une charge pyrotechnique formant avec le piston pyrotechnique une chambre pyrotechnique, un joint toroïdal entourant le piston pyrotechnique assurant l'étanchéité de la chambre pyrotechnique.In another embodiment, the pyrotechnic tube comprises, between the pyrotechnic tube wall having the circular opening and the other closure wall, a pyrotechnic piston that can slide sealingly in the pyrotechnic tube, the pyrotechnic piston being reduced in diameter to passing through the circular opening of the pyrotechnic tube wall, an igniter and a pyrotechnic charge forming with the pyrotechnic piston a pyrotechnic chamber, a toroidal seal surrounding the pyrotechnic piston sealing the pyrotechnic chamber.

Dans une autre réalisation, le piston pyrotechnique est en contact, par la surface d'application de la force de déverrouillage F, avec le piston de verrouillage dans le canon de verrouillage du fourreau fixe de façon que ledit piston de verrouillage dans l'alvéole ne soit pas en contact direct avec la paroi interne du canon de verrouillage, une pression de contact direct entre le piston de verrouillage dans l'alvéole et le piston pyrotechnique de l'artifice pyrotechnique étant exercée par le ressort de rappel comprimé entre la bague de fermeture solidaire de l'extrémité libre du canon de verrouillage et le piston de verrouillage dans l'alvéole.In another embodiment, the pyrotechnic piston is in contact, by the application surface of the unlocking force F, with the locking piston in the locking barrel of the fixed sleeve so that said locking piston in the cell does not not in direct contact with the inner wall of the locking barrel, a direct contact pressure between the locking piston in the cell and the pyrotechnic piston of the pyrotechnic device being exerted by the return spring compressed between the closing ring integral with the free end of the locking barrel and the locking piston in the cell.

Dans une autre réalisation, le dispositif de génération de la force de déverrouillage F est un dispositif électromagnétique tel qu'un électroaimant.In another embodiment, the device for generating the unlocking force F is an electromagnetic device such as an electromagnet.

Dans une autre réalisation, le dispositif de génération de la force de déverrouillage F est un dispositif pneumatique.In another embodiment, the device for generating the unlocking force F is a pneumatic device.

L'invention concerne aussi un outil de réarmement du verrouillage du mécanisme de verrouillage du tronçon de pilotage, lorsque le ressort hélicoïdal entre la collerette du fourreau mobile et la paroi de verrou du support de verrou est détendu et la collerette du fourreau mobile est en butée sur un épaulement interne de la couronne de fixation du fourreau fixe, le mécanisme de verrouillage comportant une série de trous d'axes parallèles à l'axe XX' traversant la couronne de fixation du fourreau fixe repartis régulièrement au tour de l'axe AA' et débouchant à hauteur de la collerette du fourreau mobile, caractérisé en ce qu'il comporte une poignée ayant des tiges cylindriques solidaires de la poignée distribuées sur ladite poignée de façon qu'une tige passe dans un trou respectif de la couronne de fixation, une pression exercée sur la poignée transmise par les tiges sur la collerette comprimant le ressort hélicoïdal de verrouillage pour réaliser le réarmement du dispositif de verrouillage.The invention also relates to a tool for resetting the locking of the locking mechanism of the driving section, when the coil spring between the flange of the movable sleeve and the latch wall of the latch support is expanded and the flange of the movable sleeve is in abutment. on an inner shoulder of the fixing ring of the fixed sheath, the locking mechanism comprising a series of axis parallel to the axis XX 'holes through the fixing ring of the fixed sheath distributed regularly around the axis AA 'and opening at the height of the flange of the movable sheath, characterized in that it comprises a handle having cylindrical rods secured to the handle distributed on said handle so that a rod passes in a respective hole of the fixing ring, a pressure exerted on the handle transmitted by the rods on the flange compressing the helical locking spring to perform the rearming of the locking device.

L'invention concerne aussi un outil de réarmement du verrouillage du mécanisme de verrouillage du tronçon de pilotage, lorsque le ressort hélicoïdal est comprimé entre la collerette du fourreau mobile et la couronne de fixation du fourreau fixe, la collerette du fourreau mobile comportant une série de trous filetés d'axes parallèles à l'axe XX' repartis régulièrement au tour de l'axe AA', caractérisé en ce qu'il comporte une poignée ayant des tiges cylindriques solidaires par une des ses extrémités de ladite poignée, les autres extrémités libres des tiges étant filetées pour se visser sur les trous filetés de la collerette du fourreau mobile et les rendre solidaires de la poignée, une force de traction étant exercée sur la poignée pour ramener, lors du réarmement, le fourreau mobile vers la couronne de fixation en comprimant le ressort hélicoïdal pour réaliser le réarmement du dispositif de verrouillage.The invention also relates to a tool for resetting the locking of the locking mechanism of the driving section, when the coil spring is compressed between the collar of the mobile sheath and the fixing ring of the fixed sheath, the collar of the mobile sheath comprising a series of threaded holes of axes parallel to the axis XX 'regularly distributed around the axis AA', characterized in that it comprises a handle having cylindrical rods integral with one of its ends of said handle, the other free ends rods being threaded to be screwed onto the threaded holes of the collar of the movable sheath and make them integral with the handle, a traction force being exerted on the handle to bring, during rearming, the mobile sheath towards the fixing ring in compressing the coil spring to reset the locking device.

Le tronçon de pilotage selon l'invention répond avantageusement aux exigences grâce à un mécanisme robuste et compact, doté d'un artifice pyrotechnique interchangeable.The driving section according to the invention advantageously meets the requirements thanks to a robust and compact mechanism, equipped with an exchangeable pyrotechnic device.

Le nouveau tronçon de pilotage selon l'invention apporte une amélioration de robustesse et de compacticité par rapport aux dispositifs de pilotage de l'état de l'art.The new driving section according to the invention provides an improvement in robustness and compaction with respect to the control devices of the state of the art.

L'invention sera mieux comprise à l'aide d'exemples de réalisations de tronçons de pilotage pour munition guidée en référence aux figures annexées dans lesquelles :

  • la figure 1a représente une vue partielle d'un tronçon de pilotage d'une munition guidée comportant un mécanisme de verrouillage de gouvernes, selon l'invention;
  • la figure 1b représente une vue partielle de face du tronçon de pilotage de la figure 1 a ;
  • la figure 2 montre une vue détaillée du mécanisme de verrouillage des gouvernes du tronçon de pilotage de la figure 1a comportant un artifice pyrotechnique ;
  • la figure 3 montre le mécanisme de verrouillage de la figure 2 en position verrouillée ;
  • la figure 4 montre le mécanisme de verrouillage de la figure 2 dans une première phase de déverrouillage ;
  • la figure 5 montre le mécanisme de verrouillage de la figure 2 dans une deuxième phase de déverrouillage ;
  • la figure 6 montre la dernière phase de déverrouillage du mécanisme de verrouillage de la figure 2 ;
  • la figure 7 montre le dispositif de verrouillage de la figure 2 en position déverrouillée et les gouvernes en cours de déploiement ;
  • la figure 8 montre le démontage de l'artifice pyrotechnique du mécanisme de verrouillage de la figure 2 ;
  • la figure 9 montre un dispositif de réarmement du mécanisme de verrouillage du tronçon de pilotage de la figure 2 ;
  • la figure 10 montre la dernière phase de réarmement du mécanisme de verrouillage du tronçon de pilotage de la figure 2 ;
  • les figures 11 et 12 montrent une variante du mécanisme de verrouillage du tronçon de pilotage selon l'invention.
The invention will be better understood with the aid of examples of embodiments of piloting sections for guided munitions with reference to the appended figures in which:
  • the figure 1a represents a partial view of a driving section of a guided munition comprising a control locking mechanism, according to the invention;
  • the figure 1b represents a partial front view of the driving section of the figure 1 at ;
  • the figure 2 shows a detailed view of the locking mechanism of the control surfaces of the control section of the figure 1a having a pyrotechnic device;
  • the figure 3 shows the locking mechanism of the figure 2 in locked position;
  • the figure 4 shows the locking mechanism of the figure 2 in a first unlocking phase;
  • the figure 5 shows the locking mechanism of the figure 2 in a second unlocking phase;
  • the figure 6 shows the last unlocking phase of the locking mechanism of the figure 2 ;
  • the figure 7 shows the locking device of the figure 2 in the unlocked position and the control surfaces being deployed;
  • the figure 8 shows the dismantling of the pyrotechnic device of the locking mechanism of the figure 2 ;
  • the figure 9 shows a device for resetting the locking mechanism of the steering section of the figure 2 ;
  • the figure 10 shows the last phase of rearming of the locking mechanism of the steering section of the figure 2 ;
  • the figures 11 and 12 show a variant of the locking mechanism of the driving section according to the invention.

La figure 1a représente une vue partielle d'un tronçon de pilotage d'une munition guidée comportant un mécanisme de verrouillage de gouvernes, selon l'invention.The figure 1a represents a partial view of a driving section of a guided munition comprising a control locking mechanism, according to the invention.

La figure 1b représente une vue partielle de face du tronçon de pilotage de la figure 1 a.The figure 1b represents a partial front view of the driving section of the figure 1 at.

Le tronçon de pilotage de la figure 1a comporte un corps de pilotage 50 ayant une surface externe 52 de forme cylindrique circulaire selon un axe longitudinal XX', quatre gouvernes G1, G2, G3, G4 (soit n=4) distribuées régulièrement autour de l'axe longitudinal XX' pouvant être, soit dans une position repliée dans le corps de pilotage, soit dans une position déployée dépassant de la surface externe 52 du corps de pilotage 50 pour réaliser le guidage de la munition au cours de sa phase balistique externe. Un mécanisme de verrouillage 60 maintient les quatre gouvernes en position repliée dans le corps de pilotage 50 pendant la phase de tir. La désactivation du mécanisme de verrouillage 60 libère les quatre gouvernes qui peuvent alors être mises dans leur position déployée.The driving section of the figure 1a comprises a control body 50 having an outer surface 52 of circular cylindrical shape along a longitudinal axis XX ', four control surfaces G1, G2, G3, G4 (ie n = 4) distributed regularly around the longitudinal axis XX 'can be either in a folded position in the control body, or in a deployed position protruding from the outer surface 52 of the control body 50 to carry out the guidance of the ammunition during its external ballistic phase. A locking mechanism 60 maintains the four control surfaces in the folded position in the control body 50 during the firing phase. The deactivation of the locking mechanism 60 frees the four control surfaces which can then be put in their deployed position.

Les quatre gouvernes, dans cette réalisation de la figure 1a, sont de mêmes forme rectangulaire ayant des petits côtés c1, c1' opposés et des grands côtés c2, c2' opposés. En position repliée des gouvernes, au moins les grands côtés c2,c2' sont parallèles à l'axe XX'.The four control surfaces, in this realization of the figure 1a , are of the same rectangular shape with small sides c1, c1 'opposite and long sides c2, c2' opposite. In the folded position of the control surfaces, at least the long sides c2, c2 'are parallel to the axis XX'.

Les quatre gouvernes peuvent pivoter, du côté d'un de leur petit côté c1 le plus éloigné du mécanisme de verrouillage 60, autour d'un arbre de rotation 54 respectif d'axe VV' perpendiculaire à un plan passant par l'axe longitudinal XX'. La figure 1a montre les deux gouvernes G1, G3 dans un plan P1 passant par l'axe longitudinal XX'.The four control surfaces can pivot, on the side of one of their small side c1 farthest from the locking mechanism 60, around a respective rotary shaft 54 of axis VV 'perpendicular to a plane passing through the longitudinal axis XX . The figure 1a shows the two control surfaces G1, G3 in a plane P1 passing through the longitudinal axis XX '.

Les petits côtes c1,c1' opposés des quatre gouvernes G1, G2, G3, G4 comportent, tel que représentées sur la figure 1b, du côté du mécanisme de verrouillage 60, des encoches e1, e2, e3, e4 respectives distribuées au tour d'un cercle Ce d'encoches dont le centre se trouve sur l'axe longitudinal XX' pour le verrouillage par le mécanisme de verrouillage 60 des quatre gouvernes en position repliée dans le corps de pilotage.The small ribs c1, c1 'opposite of the four control surfaces G1, G2, G3, G4 comprise, as represented on the figure 1b , on the side of the locking mechanism 60, respective notches e1, e2, e3, e4 distributed around a circle Ce of notches whose center is on the longitudinal axis XX 'for locking by the locking mechanism 60 of the four control surfaces in the folded position in the steering body.

La figure 2 montre une vue détaillée du mécanisme de verrouillage des gouvernes du tronçon de pilotage de la figure 1a comportant un artifice pyrotechnique.The figure 2 shows a detailed view of the locking mechanism of the control surfaces of the control section of the figure 1a including a pyrotechnic device.

Le mécanisme de verrouillage 60 comporte un support de verrou 62 en forme de tube de section circulaire solidaire du corps de pilotage 50, d'axe de révolution AA' confondu avec l'axe longitudinal XX', un fourreau fixe 64 solidaire du support de verrou 62 aussi de forme cylindrique d'axe de révolution AA' confondu avec l'axe longitudinal XX', un fourreau mobile 66 pouvant coulisser sur le fourreau fixe, un dispositif de verrouillage en translation maintenant en position longitudinale le fourreau mobile sur le fourreau fixe, un ressort hélicoïdal 150 de déverrouillage autour du fourreau mobile 66 pour faire glisser le fourreau mobile sur le fourreau fixe lors de la désactivation du dispositif de verrouillage.The locking mechanism 60 comprises a latch support 62 in the form of a tube of circular section integral with the control body 50, axis of revolution AA 'coincides with the longitudinal axis XX', a fixed sheath 64 integral with the latch support 62 also of cylindrical shape with an axis of revolution AA 'coincides with the longitudinal axis XX', a movable sheath 66 slidable on the fixed sheath, a locking device in translation maintaining in longitudinal position the sheath mobile on the fixed sheath, a coil spring 150 for unlocking around the sheath mobile 66 to slide the movable sheath on the fixed sheath when disabling the locking device.

Le support de verrou 62 comporte une surface interne de support 68 cylindrique circulaire de diamètre D1. Le support de verrou 62 s'élargit en diamètre, par son extrémité la plus éloignée des gouvernes, sous forme d'une couronne support de verrou 74 comportant des trous filetés 76 distribués régulièrement autour de l'axe AA'. Le support de verrou 62 est fermé à son autre extrémité par une paroi de verrou 80 comportant dans l'axe AA' une ouverture de verrou 82 circulaire de diamètre D2 inférieur au diamètre D1.The latch support 62 has a circular cylindrical inner support surface 68 of diameter D1. The latch support 62 widens in diameter, at its end farthest from the control surfaces, in the form of a lock support ring 74 having threaded holes 76 distributed regularly around the axis AA '. The latch support 62 is closed at its other end by a latch wall 80 having in the axis AA 'a circular latch opening 82 of diameter D2 less than the diameter D1.

La paroi de verrou 80 forme, du côté de la surface interne de support 68 du support de verrou 62, une surface d'appui 86 en forme de couronne dans un plan perpendiculaire à l'axe AA'.The latch wall 80 forms, on the side of the internal support surface 68 of the latch support 62, a bearing surface 86 in the form of a ring in a plane perpendicular to the axis AA '.

Le fourreau fixe 64 comporte deux extrémités opposées dans l'axe AA'. Une des extrémités du fourreau fixe comporte une couronne de fixation 100 sur la couronne de support de verrou 74 dans un plan perpendiculaire à l'axe AA' ayant des trous de fixation 102 face aux trous filetés 76 de la couronne de support de verrou 74 pour le passage de vis de fixation 104 du fourreau fixe 64 sur le support de verrou 62.The fixed sheath 64 has two opposite ends in the axis AA '. One of the ends of the fixed sheath has a fixing ring 100 on the lock support ring 74 in a plane perpendicular to the axis AA 'having attachment holes 102 facing the threaded holes 76 of the lock support ring 74 for the fixing screw passage 104 of the fixed sheath 64 on the latch support 62.

Le fourreau fixe 64 se prolonge, à l'intérieur du support de verrou 62, par un canon de verrouillage 110 en forme de tube passant par l'ouverture circulaire de verrou 82 du support de verrou 62, d'axe de révolution confondu avec l'axe AA', de section circulaire et de diamètre extérieur D3.The fixed sheath 64 is extended, inside the latch support 62, by a tube-shaped locking barrel 110 passing through the circular latch opening 82 of the latch support 62, of axis of revolution coinciding with the latch 62. axis AA 'of circular section and outside diameter D3.

Le verrouillage des quatre gouvernes est réalisé par le fourreau mobile 66 du mécanisme de verrouillage 60. Le fourreau mobile 66 est en forme de tube de section circulaire de diamètre externe D4 entourant le canon de verrouillage 110 et pouvant glisser longitudinalement selon l'axe AA', par sa surface interne 122 sur la surface externe 123 du canon de verrouillage 110 et par sa surface externe 124 de diamètre D4 dans l'ouverture de verrou 82 de la paroi de verrou 80 du support de verrou 62.The locking of the four control surfaces is carried out by the movable sleeve 66 of the locking mechanism 60. The movable sheath 66 is in the form of a tube of circular section of external diameter D4 surrounding the locking barrel 110 and able to slide longitudinally along the axis AA ' by its inner surface 122 on the outer surface 123 of the locking barrel 110 and by its outer surface 124 of diameter D4 in the latch opening 82 of the latch wall 80 of the latch support 62.

Le fourreau mobile 66 comporte, du côté de l'ouverture de verrou 82 à l'extérieur du fourreau fixe 64, une extrémité libre 130 insérée dans les encoches e1, e2, e3, e4 des quatre gouvernes pour les maintenir dans leur position repliée dans le corps de pilotage 50 et une autre extrémité 132 opposée à l'extrémité libre 130 du fourreau mobile à l'intérieur du support de verrou 62 comportant une collerette 140 de diamètre D5 supérieur au diamètre D4 de la surface externe 124 du fourreau mobile 66, ladite collerette 140 faisant face à la surface d'appui 86 du support de verrou 62 et pouvant glisser sur la surface interne de support 68 du support de verrou 62.The movable sheath 66 comprises, on the side of the lock opening 82 outside the fixed sheath 64, a free end 130 inserted into the notches e1, e2, e3, e4 of the four control surfaces to hold them in their seat. folded position in the control body 50 and another end 132 opposite the free end 130 of the mobile sheath inside the latch support 62 having a collar 140 of diameter D5 greater than the diameter D4 of the outer surface 124 of the sheath mobile 66, said flange 140 facing the bearing surface 86 of the latch support 62 and slidable on the inner support surface 68 of the latch support 62.

Le mécanisme de verrouillage 60 des gouvernes est désactivé par une force de déverrouillage F agissant sur le dispositif de verrouillage en translation du fourreau mobile 66 pour autoriser sa translation par glissement sur le canon de verrouillage 110 et le déverrouillage des quatre gouvernes qui peuvent alors passer de leur position repliée à leur position déployée. A cet effet, en position verrouillée du mécanisme, le ressort hélicoïdal 150 de déverrouillage est comprimé entre la surface d'appui 86 en forme de couronne et la collerette 140 en regard de la paroi de verrou 80 du support de verrou 62. La décompression du ressort hélicoïdal dégage l'extrémité libre 130 du fourreau mobile 66 des encoches e1, e2, e3, e4 libérant les quatre gouvernes.The locking mechanism 60 of the control surfaces is deactivated by an unlocking force F acting on the locking device in translation of the mobile sheath 66 to allow its translation by sliding on the locking barrel 110 and the unlocking of the four control surfaces which can then pass from their folded position to their deployed position. For this purpose, in the locked position of the mechanism, the unlocking coil spring 150 is compressed between the bearing surface 86 in the form of a ring and the collar 140 facing the latch wall 80 of the latch support 62. The decompression of the coil spring disengages the free end 130 of the mobile sheath 66 notches e1, e2, e3, e4 releasing the four control surfaces.

Le canon de verrouillage 110 comporte, dans une partie centrale entre ses deux extrémités, une paroi interne 160 dans un plan perpendiculaire à l'axe AA' ayant un passage circulaire 164 d'axe de révolution confondu avec l'axe AA' pour former entre l'extrémité du canon de verrouillage 110 du côté l'extrémité libre 130 du fourreau mobile 66 et ladite paroi interne 164 une alvéole 170 de section circulaire comportant une partie mobile du dispositif de verrouillage en translation destiné à être actionné par la force de déverrouillage F.The locking barrel 110 comprises, in a central part between its two ends, an inner wall 160 in a plane perpendicular to the axis AA 'having a circular passage 164 of axis of revolution coinciding with the axis AA' to form between the end of the locking barrel 110 on the free end 130 side of the mobile sheath 66 and said inner wall 164 a circular section honeycomb 170 comprising a movable portion of the translation locking device intended to be actuated by the unlocking force F .

Ladite partie mobile dans l'alvéole 170 comporte, du côté du bord libre 172 du canon de verrouillage fermé par une bague de fermeture 202 solidaire dudit bord libre 172, une rondelle d'appui 173 et un ressort de rappel 174 comprimé par un piston de verrouillage 176 sur la bague de fermeture 202. Le piston de verrouillage 176 comporte une première surface 180 cylindrique circulaire de diamètre D6 pouvant glisser à l'intérieur du canon de verrouillage 110, la première surface 180 étant raccordée par une surface intermédiaire 182 de forme tronconique à une deuxième surface 184 de diamètre D7 plus petit que le diamètre D6 de la première surface externe 180 du piston de verrouillage,Said mobile part in the cell 170 comprises, on the side of the free edge 172 of the locking barrel closed by a closure ring 202 integral with said free edge 172, a bearing washer 173 and a return spring 174 compressed by a piston of locking 176 on the closure ring 202. The locking piston 176 has a first circular cylindrical surface 180 of diameter D6 slidable inside the locking barrel 110, the first surface 180 being connected by an intermediate surface 182 of frustoconical shape. to a second surface 184 of diameter D7 smaller than the diameter D6 of the first external surface 180 of the locking piston,

Le dispositif de verrouillage en translation comporte des trous de blocage 190 dans la paroi circulaire du canon de verrouillage 110 distribués régulièrement autour de l'axe AA' et, dans un plan perpendiculaire au dit axe AA', des billes de blocage 194 insérées dans les trous de blocage 190, les billes étant de diamètre supérieur à l'épaisseur de la paroi circulaire du canon de verrouillage 110 de façon à dépasser en partie de la surface externe du canon de verrouillage 110 pour se loger dans une gorge 200 de section circulaire dans la paroi du fourreau mobile 66.The translation locking device comprises locking holes 190 in the circular wall of the locking barrel 110 regularly distributed about the axis AA 'and, in a plane perpendicular to said axis AA', locking balls 194 inserted into the locking holes 190, the balls being of diameter greater than the thickness of the circular wall of the locking barrel 110 so as to partially exceed the outer surface of the locking barrel 110 to fit in a groove 200 of circular section in the wall of the mobile sheath 66.

Dans une position dite verrouillée du mécanisme de verrouillage bloquant en translation le fourreau mobile 66 sur le canon de verrouillage 110, les billes de blocage 194, dans les trous de blocage 190 de la paroi circulaire du canon de verrouillage 110, en contact avec la première surface 180 circulaire de diamètre D6 du piston de verrouillage 176 sont insérées par la partie des billes dépassant des trous de blocage 190 dans la gorge 200 du fourreau mobile 66, le ressort de rappel 174 étant alors en partie comprimé entre la bague de fermeture 202 solidaire du bord libre 172 du fourreau fixe et le piston de verrouillage 176.In a so-called locked position of the locking mechanism blocking in translation the movable sleeve 66 on the locking barrel 110, the locking balls 194, in the locking holes 190 of the circular wall of the locking barrel 110, in contact with the first 180 circular surface diameter D6 of the locking piston 176 are inserted by the portion of the balls protruding from the locking holes 190 in the groove 200 of the movable sleeve 66, the return spring 174 then being partially compressed between the fastening ring 202 integral of the free edge 172 of the fixed sheath and the locking piston 176.

L'alvéole 170 du fourreau fixe 110 débouche à travers le passage circulaire 164 sur une autre alvéole 210 de forme cylindrique circulaire de diamètre D8 d'axe de révolution confondu avec l'axe AA' débouchant par la couronne de fixation 100 du fourreau fixe 64. Cet autre alvéole 210 contient, dans cette réalisation, un artifice pyrotechnique 220 destiné à la génération de la force de déverrouillage F sur le piston de verrouillage 176 du mécanisme de verrouillage.The cell 170 of the fixed sleeve 110 opens through the circular passage 164 to another cell 210 of circular cylindrical shape with a diameter D8 of axis of revolution coincides with the axis AA 'opening through the fixing ring 100 of the fixed sheath 64 This other cell 210 contains, in this embodiment, a pyrotechnic device 220 for generating the unlocking force F on the locking piston 176 of the locking mechanism.

L'artifice pyrotechnique 220 comporte, un tube pyrotechnique 222 de section circulaire pouvant glisser dans l'autre alvéole 210. Le tube pyrotechnique est fermé, du côté de la paroi interne 160 du canon de verrouillage 110, par une paroi de tube pyrotechnique 224 comportant une ouverture circulaire 226 de diamètre D9 et, par l'autre côte du tube pyrotechnique 222 par une autre paroi de fermeture 230 de section circulaire de diamètre D10 supérieur au diamètre D8 du tube pyrotechnique. L'autre paroi de fermeture 230 se prolonge par un corps cylindrique 231 de diamètre D12 inférieur au diamètre de la l'autre paroi de fermeture 230 pour créer une surface d'appui 232 en forme de couronne pour une bague de serrage 234. La bague de serrage 234 est filetée sur sa périphérie et comporte un passage 235 dans son axe pour le passage du corps cylindrique 231 de l'artifice pyrotechnique 220.The pyrotechnic device 220 comprises, a pyrotechnic tube 222 of circular section that can slide in the other cell 210. The pyrotechnic tube is closed, on the side of the inner wall 160 of the locking barrel 110, by a pyrotechnic tube wall 224 comprising a circular opening 226 of diameter D9 and, on the other side of the pyrotechnic tube 222 by another closing wall 230 of circular section of diameter D10 greater than the diameter D8 of the pyrotechnic tube. The other closure wall 230 is extended by a cylindrical body 231 of diameter D12 smaller than the diameter of the other closure wall 230 to create a bearing surface 232 in the form of a ring for a clamping ring 234. The clamping ring 234 is threaded on its periphery and has a passage 235 in its axis for the passage of the cylindrical body 231 of the pyrotechnic device 220.

Le tube pyrotechnique 222 comporte, entre la paroi de tube pyrotechnique 224 comportant l'ouverture circulaire 226 et l'autre paroi de fermeture 230, un piston pyrotechnique 240 pouvant glisser de façon étanche dans le tube pyrotechnique 222, le piston pyrotechnique 240 se réduisant en diamètre pour passer à travers l'ouverture circulaire 226 de la paroi de tube pyrotechnique, un inflammateur 250 et une charge pyrotechnique 252 formant avec le piston pyrotechnique 240 une chambre pyrotechnique 260.The pyrotechnic tube 222 comprises, between the pyrotechnic tube wall 224 comprising the circular opening 226 and the other closure wall 230, a pyrotechnic piston 240 that can slide in a sealed manner in the pyrotechnic tube 222, the pyrotechnic piston 240 being reduced to diameter to pass through the circular opening 226 of the pyrotechnic tube wall, an igniter 250 and a pyrotechnic charge 252 forming with the pyrotechnic piston 240 a pyrotechnic chamber 260.

Un joint toroïdal 264 entourant le piston pyrotechnique 240 assure l'étanchéité de la chambre pyrotechnique 260.A toroidal seal 264 surrounding the pyrotechnic piston 240 seals the pyrotechnic chamber 260.

L'autre alvéole 210 de forme cylindrique circulaire de diamètre D8 débouche par la couronne de fixation 100 du fourreau fixe 64 par un évidement de couronne 270 fileté de section circulaire de diamètre supérieur au diamètre de la paroi de fermeture 230 du tube pyrotechnique créant un épaulement de couronne 272.The other cell 210 of circular cylindrical shape of diameter D8 opens through the fixing ring 100 of the fixed sheath 64 by a ring-shaped recess 270 of circular section with a diameter greater than the diameter of the closure wall 230 of the pyrotechnic tube creating a shoulder of crown 272.

Lorsque l'artifice pyrotechnique est inséré dans l'autre alvéole 210, la paroi de fermeture 230 du tube pyrotechnique vient en butée sur l'épaulement de couronne 272. Le vissage de la bague de serrage 234 filetée sur le filetage interne de l'évidement de couronne 270 assure un blocage de l'artifice pyrotechnique dans l'autre alvéole 210 du canon de verrouillage 110.When the pyrotechnic device is inserted into the other cell 210, the closing wall 230 of the pyrotechnic tube abuts the crown shoulder 272. The screwing of the clamping ring 234 threaded on the internal thread of the recess of crown 270 ensures a blocking of the pyrotechnic device in the other cell 210 of the locking gun 110.

La figure 3 montre le mécanisme de verrouillage de la figure 2 en position verrouilléeThe figure 3 shows the locking mechanism of the figure 2 in locked position

La figure 3 montre l'artifice pyrotechnique 220 verrouillé dans l'autre alvéole 210 du canon de verrouillage 110 du mécanisme de verrouillage par la bague de serrage 234 vissée dans l'évidement fileté de la couronne de fixation 100.The figure 3 shows the pyrotechnic device 220 locked in the other cell 210 of the locking barrel 110 of the locking mechanism by the clamping ring 234 screwed into the threaded recess of the fixing ring 100.

Des contacts électriques 280 traversant le corps cylindrique 231 assurent l'activation électrique de l'inflammateur 250 de l'artifice pyrotechnique par un dispositif externe de déclenchement du déverrouillage (non représenté sur les figures).Electrical contacts 280 passing through the cylindrical body 231 provide electrical activation of the igniter 250 of the pyrotechnic device by an external device for triggering the unlocking (not shown in the figures).

Le dispositif externe peut aussi commander, lorsque les gouvernes sont libérées, leur déploiement à un moment choisi du vol de la munition guidée. Le déploiement des quatre gouvernes peut être aussi réalisé automatiquement lorsqu'elles sont libérées.The external device can also control, when the control surfaces are released, their deployment at a chosen moment of the flight of the guided munition. The deployment of the four control surfaces can also be realized automatically when they are released.

L'activation électrique de l'inflammateur 250 puis de la charge pyrotechnique 252 produisent, par la pression de gaz dégagés dans la chambre pyrotechnique 260, le déplacement du piston pyrotechnique 240 vers l'extérieur de la chambre pyrotechnique et la génération par ledit piston pyrotechnique d'une force de déverrouillage F sur la surface d'application 113 de la force de déverrouillage du piston de verrouillage 176.The electrical activation of the igniter 250 and the pyrotechnic charge 252 produce, by the gas pressure released in the pyrotechnic chamber 260, the movement of the pyrotechnic piston 240 towards the outside of the pyrotechnic chamber and the generation by said pyrotechnic piston an unlocking force F on the application surface 113 of the unlocking force of the locking piston 176.

Par la suite est décrit le fonctionnement du mécanisme de verrouillage 60 du tronçon de pilotage selon l'invention en se référant aux figures 3, 4, 5, 6 et 7.Next, the operation of the locking mechanism 60 of the driving section according to the invention is described with reference to the figures 3 , 4 , 5 , 6 and 7 .

Le mécanisme de verrouillage, montré à la figure 3, est en position de verrouillage des quatre gouvernes G1, G2, G3, G4 dans leur position repliée dans le corps de pilotage 50. Le dispositif pyrotechnique 220 est inséré et maintenu en position dans l'autre alvéole 210 du canon de verrouillage 110, par la bague de serrage 234 vissée dans l'évidement 270 fileté de la couronne de fixation 100. Dans cette configuration de verrouillage, le piston pyrotechnique 240 est en contact direct avec le piston de verrouillage 176 dans le canon de verrouillage 110 du fourreau fixe 64 de façon que ledit piston de verrouillage 176 dans l'alvéole 170 ne soit pas en contact direct avec la paroi interne 160 du canon de verrouillage 110, une pression de contact direct entre le piston de verrouillage 176 dans l'alvéole 170 et le piston pyrotechnique 240 de l'artifice pyrotechnique étant exercée par le ressort de rappel 174 comprimé entre la bague de fermeture 202 solidaire de l'extrémité libre 172 du canon de verrouillage et le piston de verrouillage 176 dans l'alvéole 170.The locking mechanism, shown in figure 3 , is in the locking position of the four control surfaces G1, G2, G3, G4 in their folded position in the control body 50. The pyrotechnic device 220 is inserted and held in position in the other cell 210 of the locking gun 110, by the clamping ring 234 screwed into the threaded recess 270 of the fixing ring 100. In this locking configuration, the pyrotechnic piston 240 is in direct contact with the locking piston 176 in the locking barrel 110 of the fixed sheath 64 of so that said locking piston 176 in the cell 170 is not in direct contact with the inner wall 160 of the locking barrel 110, a direct contact pressure between the locking piston 176 in the cell 170 and the pyrotechnic piston 240 the pyrotechnic device being exerted by the return spring 174 compressed between the closure ring 202 integral with the free end 172 of the locking barrel and the piston of the lock screen 176 in the cell 170.

La figure 4 montre le mécanisme de verrouillage de la figure 2 dans une première phase de déverrouillage.The figure 4 shows the locking mechanism of the figure 2 in a first unlocking phase.

L'activation de l'inflammateur 250 et de la charge pyrotechnique 252 produit une pression de gaz dans la chambre pyrotechnique 260 et une force de déverrouillage F exercée par le piston pyrotechnique 240 sur le piston de verrouillage 176 qui se déplace vers le bord libre 172 du canon de verrouillage 110 en comprimant le ressort de rappel 174. Dans cette première phase de déverrouillage, la deuxième surface 184 du piston de verrouillage 176 déplacé par la poussée du piston pyrotechnique 240 se trouve en face des billes de blocage 194.Activation of the igniter 250 and the pyrotechnic charge 252 produces a gas pressure in the pyrotechnic chamber 260 and an unlocking force F exerted by the pyrotechnic piston 240 on the locking piston 176 which moves towards the free edge 172 of the locking barrel 110 by compressing the return spring 174. In this first unlocking phase, the second surface 184 of the locking piston 176 moved by the thrust of the pyrotechnic piston 240 is opposite the locking balls 194.

La figure 5 montre le mécanisme de verrouillage de la figure 2 dans une deuxième phase de déverrouillage.The figure 5 shows the locking mechanism of the figure 2 in a second unlocking phase.

Les billes de blocage 194 guidées par les trous de blocage 190 peuvent, dans cette deuxième phase, se positionner sur la deuxième surface 184 du piston de verrouillage 176 de plus petit diamètre D7 se dégageant alors de la gorge 200 du fourreau mobile qui se trouve alors libéré. Le ressort hélicoïdal 150 en se détendant déplace le fourreau mobile (66) vers l'intérieur du support de verrou 62.The locking balls 194 guided by the locking holes 190 can, in this second phase, be positioned on the second surface 184 of the smaller diameter locking piston 176 D7 then disengaging from the groove 200 of the mobile sheath which is then released. The coil spring 150 as it depresses moves the movable sleeve (66) inwardly of the lock bracket 62.

La figure 6 montre la dernière phase de déverrouillage du mécanisme de verrouillage de la figure 2.The figure 6 shows the last unlocking phase of the locking mechanism of the figure 2 .

Le déplacement du fourreau mobile 66 se poursuit vers l'intérieur du support de verrou 62 jusqu'à venir en butée par sa collerette 140 sur un épaulement interne 245 de la couronne de fixation 100 à l'intérieur du support de verrou 62 tel que représenté à la figure 6. Dans cette dernière phase l'extrémité libre 130 du fourreau mobile 66 est désengagée des encoches e1, e2, e3, e4 des quatre gouvernes qui se trouvent alors libérées en rotation autour de leur axe 54.The movement of the movable sheath 66 continues towards the interior of the latch support 62 until it comes to a stop by its flange 140 on an internal shoulder 245 of the fixing ring 100 inside the latch support 62 as represented to the figure 6 . In this last phase, the free end 130 of the mobile sleeve 66 is disengaged from the notches e1, e2, e3, e4 of the four control surfaces which are then released in rotation about their axis 54.

Le ressort de rappel 174 est comprimé par le piston de verrouillage 176 lui-même poussé par le piston pyrotechnique 240 dans le canon de verrouillage 110. Le piston de verrouillage 176 se trouve, dans cette dernière phase, bloqué en déplacement dans l'alvéole 170 par les billes de blocage194 maintenues entre la surface interne 122 du fourreau mobile 66 et les surfaces, intermédiaire 182 tronconique et deuxième surface 184 de diamètre D7 du piston de verrouillage176.The return spring 174 is compressed by the locking piston 176 itself pushed by the pyrotechnic piston 240 in the locking barrel 110. The locking piston 176 is, in this last phase, locked in displacement in the cell 170 by the locking balls maintained between the inner surface 122 of the movable sheath 66 and the surfaces, frustoconical intermediate 182 and second surface 184 of diameter D7 of the locking piston 176.

Les gouvernes étant libérées peuvent alors tourner autour de leur arbre 54 pour se mettre en position déployée.The control surfaces being released can then rotate around their shaft 54 to move into the deployed position.

La figure 7 montre le dispositif de verrouillage de la figure 2 en position déverrouillée et les gouvernes en cours de déploiement.The figure 7 shows the locking device of the figure 2 in the unlocked position and the control surfaces being deployed.

Une électronique de commande du système du tronçon de pilotage non représenté sur les figures assure l'initiation de l'inflammateur de l'artifice pyrotechnique interchangeable via ses deux broches d'alimentation 280.An electronic control system of the steering section system not shown in the figures ensures the initiation of the exciter of the pyrotechnic pyrotechnic exchangeable via its two power pins 280.

La figure 8 montre le démontage de l'artifice pyrotechnique du mécanisme de verrouillage de la figure 2.The figure 8 shows the dismantling of the pyrotechnic device of the locking mechanism of the figure 2 .

L'artifice pyrotechnique est interchangeable et donc indépendant du système de verrouillage, ce qui permet sa dépose ou son remplacement à tout moment. Une fois utilisé pour le déclenchement du mécanisme de verrouillage, Il suffit de dévisser la bague de serrage 234 de la couronne de fixation 100 pour extraire le dispositif pyrotechnique utilisé de l'autre alvéole 210 du canon de verrouillage 110 et éventuellement le remplacer par un nouveau.The pyrotechnic device is interchangeable and therefore independent of the locking system, which allows its removal or replacement at any time. Once used for triggering the locking mechanism, simply unscrew the clamping ring 234 of the fixing ring 100 to extract the pyrotechnic device used from the other cell 210 of the locking barrel 110 and possibly replace it with a new one. .

L'invention concerne aussi un dispositif de réarmement du verrouillage du mécanisme de verrouillage du tronçon de pilotage selon l'invention.The invention also relates to a device for resetting the locking of the locking mechanism of the driving section according to the invention.

La figure 9 montre un dispositif de réarmement du mécanisme de verrouillage du tronçon de pilotage de la figure 2.The figure 9 shows a device for resetting the locking mechanism of the steering section of the figure 2 .

Pour le rendre réarmable ou reverrouillable, le mécanisme de verrouillage comporte une série de trous 300 d'axes parallèles à l'axe XX' traversant la couronne de fixation 100 du fourreau fixe 64 repartis régulièrement au tour de l'axe AA' et débouchant à hauteur de la collerette 140 du fourreau mobile 66 et un outil de réarmement 310.To make it resealable or releasable, the locking mechanism comprises a series of holes 300 of axes parallel to the axis XX 'passing through the fixing ring 100 of the fixed sheath 64 distributed regularly around the axis AA' and opening at height of the flange 140 of the mobile sheath 66 and a resetting tool 310.

L'outil de réarmement 310 comporte essentiellement une poignée 320 ayant des tiges 322 cylindriques solidaires de la poignée 320 distribuées sur la poignée de façon qu'une tige puisse passer dans un des trous en regard dans la couronne de fixation 100.The resetting tool 310 essentially comprises a handle 320 having cylindrical rods 322 integral with the handle 320 distributed on the handle so that a rod can pass into one of the holes facing in the fixing ring 100.

Les gouvernes sont ramenées ou mises dans la position repliée.The control surfaces are brought back or put in the folded position.

La figure 9 montre une première phase du réarmement du mécanisme de verrouillage de la figure 2. Les tiges 322 passant dans les trous 300 de la couronne de fixation du fourreau fixe viennent en appui sur la collerette 140 du fourreau mobile 66 comprimant le ressort hélicoïdal 150 autour du fourreau mobile 66 et faisant glisser le fourreau mobile 66 sur le canon de verrouillage 110 du fourreau fixe 64.The figure 9 shows a first phase of rearming the locking mechanism of the figure 2 . The rods 322 passing through the holes 300 of the fixing ring of the fixed sheath bear against the flange 140 of the mobile sheath 66 compressing the helical spring 150 around the mobile sheath 66 and sliding the movable sheath 66 onto the locking barrel 110 fixed sheath 64.

La figure 10 montre la dernière phase de réarmement du mécanisme de verrouillage du tronçon de pilotage de la figure 2.The figure 10 shows the last phase of rearming of the locking mechanism of the steering section of the figure 2 .

Dans cette dernière phase de réarmement une pression suffisante est exercée sur la poignée 320 pour comprimer le ressort hélicoïdal 150 jusqu'à ce que la gorge 200 de la paroi du fourreau mobile arrive en face des billes de blocage 194 qui peuvent se placer sur la dite gorge 200 poussées par la surface intermédiaire 182 tronconique du piston de verrouillage lui-même repoussé par le ressort de rappel 174 se détendant et qui avait été comprimé lors du déverrouillage du dispositif de verrouillage. Les billes de blocage 194 se trouvent alors bloquées dans la gorge 200 par la première surface de plus grand diamètre D6 du piston de verrouillage 176 du canon de verrouillage mettant le dispositif de verrouillage en position réarmée ou verrouillée, le piston de verrouillage 176 étant en appui sur la paroi interne 160 du canon de verrouillage 110 en attente du remplacement de l'artifice pyrotechnique.In this last rearming phase sufficient pressure is exerted on the handle 320 to compress the helical spring 150 until the groove 200 of the wall of the movable sleeve comes in front of the locking balls 194 which can be placed on the said groove 200 pushed by the frustoconical intermediate surface 182 of the locking piston itself pushed by the spring 174 relaxing and which had been compressed during unlocking of the locking device. The locking balls 194 are then locked in the groove 200 by the first larger diameter surface D6 of the locking piston 176 of the locking barrel putting the locking device in the reset or locked position, the locking piston 176 being in support. on the inner wall 160 of the locking barrel 110 waiting for the replacement of the pyrotechnic device.

Les figures 11 et 12 montrent une variante du mécanisme de verrouillage du tronçon de pilotage selon l'invention.The figures 11 and 12 show a variant of the locking mechanism of the driving section according to the invention.

La figure 11 montre le dispositif de déverrouillage en position verrouillée et la figure 12 en position déverrouillée.The figure 11 shows the unlocking device in the locked position and the figure 12 in unlocked position.

Dans cette variante des figures 11 et 12, le déverrouillage des gouvernes est réalisé par un déplacement du fourreau mobile 66 dans le sens opposé à celui du déplacement du fourreau mobile de la figure 1a. A cet effet, le ressort hélicoïdal 150 est comprimé entre la collerette 140 du fourreau mobile et la couronne de fixation 100 du fourreau fixe 64. Lorsque le dispositif de verrouillage en translation maintenant en position longitudinale le fourreau mobile 66 sur le fourreau fixe 64 est déclenché ou désactivé par l'activation de l'artifice pyrotechnique, le ressort hélicoïdal 150 étant libéré se détend en poussant le fourreau mobile 66 vers l'extérieur du support de verrou 62. L'extrémité libre 130 du fourreau mobile 66 coopère avec les quatre gouvernes par un mécanisme intermédiaire, non représenté sur les figures, pour les libérer.In this variant of figures 11 and 12 , the unlocking of the control surfaces is achieved by a displacement of the movable sleeve 66 in the opposite direction to that of the displacement of the movable sleeve of the figure 1a . For this purpose, the helical spring 150 is compressed between the flange 140 of the mobile sheath and the fixing ring 100 of the fixed sheath 64. When the translational locking device holding the sheath 66 on the fixed sheath 64 in longitudinal position is triggered or deactivated by the activation of the pyrotechnic device, the coil spring 150 being released relaxes by pushing the movable sheath 66 towards the outside of the latch support 62. The free end 130 of the movable sheath 66 cooperates with the four control surfaces by an intermediate mechanism, not shown in the figures, to release them.

Pour le rendre réarmable la variante du dispositif des figures 11 et 12, la collerette140 du fourreau mobile comporte une série de trous filetés 400 d'axes parallèles à l'axe XX' repartis régulièrement au tour de l'axe AA' et débouchant à hauteur de la collerette du fourreau mobile 66 et un outil de réarmement.To make it resettable, the variant of the device figures 11 and 12 , the flange 140 of the movable sleeve comprises a series of threaded holes 400 of axes parallel to the axis XX 'distributed regularly around the axis AA' and opening at the height of the collar of the movable sleeve 66 and a reset tool.

L'outil de réarmement comporte essentiellement une poignée ayant des tiges cylindriques solidaires par une des extrémités de la poignée, les autres extrémités libres des tiges étant filetées pour se visser sur les trous filetés de la collerette du fourreau mobile.The reset tool essentially comprises a handle having cylindrical rods integral with one end of the handle, the other free ends of the rods being threaded to screw on the threaded holes of the collar of the mobile sheath.

Dans une première phase du réarmement, les extrémités filetées des tiges sont vissées dans les trous filetés de la collerette et rendues solidaires de la poignée.In a first phase of rearming, the threaded ends of the rods are screwed into the threaded holes of the collar and made integral with the handle.

Les gouvernes sont ramenées ou mises dans la position repliée, puis une force de traction suffisante est exercée sur la poignée pour ramener le fourreau mobile 66 vers la couronne de fixation en comprimant le ressort hélicoïdal 150 jusqu'à ce que le billes de blocage 194 rentrent dans la gorge 200 de la paroi du fourreau mobile, comme dans le cas de la réalisation des figures 9 et 10 pour comprimer le ressort hélicoïdal 150 et faire glisser le fourreau mobile 66 sur le canon de verrouillage 110 du fourreau fixe 64 jusqu'à la position de verrouillage du dispositif de verrouillage.The control surfaces are brought back or put in the folded position, then a sufficient traction force is exerted on the handle to bring the movable sheath 66 back to the fixing ring by compressing the coil spring 150 until the locking ball 194 returns. in the groove 200 of the wall of the mobile sheath, as in the case of the production of figures 9 and 10 for compressing the coil spring 150 and sliding the movable sleeve 66 on the locking barrel 110 of the fixed sleeve 64 to the locking position of the locking device.

L'invention n'est pas limitative à un nombre de gouvernes déterminé et peut être utilisée dans des tronçons de pilotage comportant n gouvernes G1, G2,...Gi,...Gn, i étant l'indice de la gouverne, n étant supérieur à 1.The invention is not limiting to a given number of rudders and can be used in steering sections having n control surfaces G1, G2,..., Gn, where g is the index of the rudder, n being greater than 1.

Le dispositif générant la force de déverrouillage F peut être obtenu par différents dispositifs et n'est pas limitée à un dispositif pyrotechnique, par exemple la force de déverrouillage F peut être générée par un dispositif électromagnétique, pneumatique ou tout autre dispositif qui amène à générer une force appliquée sur le piston de verrouillage 176 du canon de verrouillage.The device generating the unlocking force F can be obtained by different devices and is not limited to a pyrotechnic device, for example the unlocking force F can be generated by an electromagnetic device, pneumatic device or any other device which leads to generating a force applied to the locking piston 176 of the locking barrel.

Le dispositif de verrouillage des gouvernes qui étant de révolution et de dimensions réduites, est avantageusement très compact.The control surfaces locking device which is of revolution and reduced dimensions, is advantageously very compact.

Le dispositif de verrouillage permet, lorsqu'il est en position verrouillée, de supporter la forte phase d'accélération lors du coup de canon. Pendant cette phase le piston de verrouillage dans l'alvéole du canon de verrouillage est en appui sur le piston pyrotechnique si l'accélération est de type "coup canon", ledit piston de verrouillage 176 en plus de l'appui sur le piston pyrotechnique peut venir en double appui sur la paroi interne 160 du canon de verrouillage 110 du fourreau fixe 64.The locking device allows, when in the locked position, to withstand the strong acceleration phase during the gun. During this phase, the locking piston in the cell of the locking barrel bears against the pyrotechnic piston if the acceleration is of the "cannon" type, said locking piston 176 in addition to pressing on the pyrotechnic piston can come in double support on the inner wall 160 of the locking barrel 110 of the fixed sheath 64.

Le dispositif de verrouillage du tronçon de pilotage selon l'invention est robuste, véloce et présente un fonctionnement de type instantané grâce à l'utilisation d'un artifice pyrotechnique interchangeable mais aussi grâce au ressort hélicoïdal de déverrouillage qui a une énergie stockée ne demandant qu'à se détendre.The locking device of the driving section according to the invention is robust, fast and has an instantaneous type of operation thanks to the use of an exchangeable pyrotechnic device but also thanks to the helical release spring which has a stored energy requiring only to relax.

Le dispositif de verrouillage est réversible grâce à la surface intermédiaire de forme tronconique du piston de verrouillage dans le canon de verrouillage qui, sous l'action du ressort de rappel, tend à repositionner les billes de blocage dans la gorge du fourreau mobile lorsque celle-ci est en vis à vis des billes de blocageThe locking device is reversible thanks to the frustoconical intermediate surface of the locking piston in the locking barrel which, under the action of the return spring, tends to reposition the locking balls in the groove of the mobile sheath when the latter it is opposite blocking balls

Le dispositif de verrouillage est adaptable sur tous systèmes d'ouverture de type ombrelle.The locking device is adaptable to all umbrella type opening systems.

Claims (18)

  1. Steering section for guided munition comprising a steering body (50) having an external surface (52) of cylindrical shape about a longitudinal axis XX', n control surfaces G1, G2,...Gi,...Gn around the longitudinal axis XX' which can adopt either a folded position folded inside the steering body (50) or a deployed position protruding from the external surface (52) of the steering body, n being a whole number greater than 1, in order to guide the munition,
    characterized in that it comprises a locking mechanism (60) for locking the n control surfaces in the folded position inside the steering body (50), the said locking mechanism having
    - a lock support (62) in the form of a tube secured at one end to the steering body (50), of axis of revolution AA' coincident with the longitudinal axis XX', closed, at its end nearest the n control surfaces, by a lock wall (80) comprising, along the axis AA', a lock opening (82) of diameter D2 less than the diameter D1 of the cylindrical internal surface (68) of the lock support so as to form, inside the lock support, an annulus-shaped bearing surface (86),
    - a fixed sleeve (64) of cylindrical shape of axis of revolution AA' coinciding with the longitudinal axis XX' and comprising a fixing anulus (100) in a plane perpendicular to the axis AA' secured to the lock support (62) by the opposite end to the lock wall (80), a locking barrel (110) in the form of a tube of circular cross section with outside diameter D3 passing through the lock opening (82) and having a free edge (172) outside the lock support (62),
    - a mobile sleeve (66) in the form of a tube of circular cross section of external diameter D4 surrounding the fixed sleeve (64) and able to slide longitudinally along the axis AA' via its internal surface (122) on the external surface (123) of the locking barrel (110), the mobile sleeve (66) comprising, at the same end of the lock opening (82) on the outside of the fixed sleeve (64), a free end (130) collaborating with the n control surfaces G1, G2, ...Gi,...Gn in order to keep them in their folded position inside the steering body (50) and another end, the opposite end to the free end (130) inside the lock support (62) comprising a flange (140) of diameter D5 greater than the external diameter D4 of the mobile sleeve (66),
    - a translational-locking device (174, 176, 194, 200) for locking the translational movement along the axis AA' of the mobile sleeve (66) on the locking barrel (110), which can be deactivated by an unlocking force F to trigger a sliding translational movement of the mobile sleeve (66) on the locking barrel (110) and the release of the n control surfaces which can then move from their folded position into their deployed position,
    - an unlocking helical spring (150) around the mobile sleeve (66) to cause the mobile sleeve to slide on the fixed sleeve (64) when the locking device is deactivated.
  2. Steering section according to Claim 1, characterized in that the locking barrel (110) comprises, in a central part between its two ends, an internal wall (160) in a plane perpendicular to the axis AA' having a circular passage (164) of axis coincident with the axis AA' so as to form, between the end of the locking barrel (110) and the said internal wall (160) a cavity (170) of circular cross section comprising a mobile part (174, 176, 194) of the locking device.
  3. Steering section according to Claim 2, characterized in that the mobile part (174, 176, 194) of the locking device comprises, between the free edge (172) and the internal wall (160) of the locking barrel (110), a return spring (174), compressed by a locking piston (176) having a first piston surface (180) of diameter D6 that can slide in the cavity (170) of the locking barrel (110), the first piston surface (180) being connected by an intermediate surface (182) of frustoconical shape to a second piston surface (184) of diameter D7 smaller than the diameter D6 of the first surface (180) of the locking piston.
  4. Steering section according to Claim 3, characterized in that the translational-locking device comprises blocking holes (190) in the circular wall of the locking barrel (110) and evenly distributed about the axis AA' in a plane perpendicular to the said axis AA', blocking balls (194), inserted in the blocking holes (190) of diameter greater than the thickness of the circular wall of the locking barrel (110), a groove (200) on the side of the internal surface of the mobile sleeve (66), when the locking mechanism is in a position known as the locked position, the blocking balls (194) inserted in the blocking holes (190) of the circular wall of the locking barrel (110) in contact with the first piston surface (180) of diameter D6 are inserted partially into the groove (200) of the mobile sleeve blocking the mobile sleeve (66) against translational movement along the fixed sleeve (64).
  5. Steering section according to Claim 4, characterized in that, when the locking mechanism is in what is known as the locked position, the helical spring (150) is compressed between the flange (140) of the mobile sleeve (66) and the lock wall (80) of the lock support (62), the helical spring, on relaxing upon deactivation of the locking device, bringing the free end (130) of the mobile sleeve (66) closer to the fixed sleeve (64).
  6. Steering section according to Claim 4, characterized in that, when the locking mechanism is in what is known as the locked position, the helical spring (150) is compressed between the flange (140) of the mobile sleeve (66) and the fixing annulus (100) of the fixed sleeve (64), the helical spring, as it relaxes upon deactivation of the locking device, moving the free end (130) of the mobile sleeve (66) further away from the fixed sleeve (64).
  7. Steering section according to one of Claims 4 to 6, characterized in that the mobile part locking piston (176) comprises, at the same end of the circular passage (164) of the internal wall (160) of the locking barrel (110), an application surface (113) on which the unlocking force F acts in order to compress the return spring (174) and, during a first phase of unlocking of the locking mechanism, applies the second surface (184) of diameter D7 of the locking piston facing the blocking balls (194) which, on withdrawing from the groove (200) of the internal surface of the mobile sleeve (66) allow the mobile sleeve (66) a translational movement along the locking barrel (110) through the relaxation of the unlocking helical spring (150), in a last unlocking phase, releasing the n control surfaces and allowing them to pass from the folded position into the deployed position.
  8. Steering section according to Claim 2, characterized in that the locking barrel comprises another cavity (210) between the internal wall (160) of the locking barrel and the fixing annulus (100) secured to the lock support (62), the other cavity (210) opening via the fixing annulus (100) containing a device for generating the unlocking force F which is secured to the steering section body.
  9. Steering section according to Claim 8, characterized in that the device for generating the unlocking force F is a pyrotechnic device (220).
  10. Steering section according to Claim 9, characterized in that the pyrotechnic device (220) comprises a pyrotechnic tube (222) of circular cross section able to slide in the other cavity (210), the pyrotechnic tube being closed, at the same end as the internal wall (160) of the locking barrel (110), by a pyrotechnic tube wall (224) comprising a circular opening (226) of diameter D9, and at the other end of the pyrotechnic tube (222) by another closure wall (230) of circular cross section of diameter D10 greater than the diameter D8 of the pyrotechnic tube.
  11. Steering section according to Claim 10, characterized in that the other closure wall (230) of the pyrotechnic device is extended by a cylindrical body (231) of diameter D12 less than the diameter of the other closure wall (230) in order to create an annulus-shaped bearing surface (232) for a clamping ring (234), threaded on its periphery, comprising a passage (235) on its axis of revolution for the passage, through the said clamping ring, of the cylindrical body (231) of the pyrotechnic device (220).
  12. Steering section according to Claim 11, characterized in that the pyrotechnic tube (222) comprises, between the pyrotechnic tube wall (224) comprising the circular opening (226) and the other closure wall (230), a pyrotechnic piston (240) able to slide in a fluidtight manner inside the pyrotechnic tube (222), the pyrotechnic piston (240) reducing in diameter so as to pass through the circular opening (226) in the wall of the pyrotechnic tube, an igniter (250) and a pyrotechnic charge (252) forming, with the pyrotechnic piston (240), a pyrotechnic chamber (260), an O-ring seal (264) surrounding the pyrotechnic piston (240) ensuring that the pyrotechnic chamber (260) is fluidtight.
  13. Steering section according to Claim 12, characterized in that the pyrotechnic piston (240) is in contact, via the application surface (113) on which the unlocking force F acts, with the locking piston (176) in the locking barrel (110) of the fixed sleeve (64) such that the said locking piston (176) in the cavity (170) is not in direct contact with the internal wall (160) of the locking barrel (110), pressure of direct contact between the locking piston (176) in the cavity (170) and the pyrotechnic piston (240) of the pyrotechnic device being applied by the return spring (174) compressed between the closure ring (202) secured to the free end (172) of the locking barrel and the locking piston (176) in the cavity (170).
  14. Steering section according to Claim 1, characterized in that the force-generating device that generates the unlocking force F is an electromagnetic device such as an electromagnet.
  15. Steering section according to Claim 1, characterized in that the force-generating device that generates the unlocking force F is a pneumatic device.
  16. Tool for resetting the locking of the locking mechanism of the steering section according to Claim 5 when the helical spring (150) between the flange (140) of the mobile sleeve (66) and the lock wall (80) of the lock support (62) is relaxed and the flange of the mobile sleeve is in abutment against an internal shoulder of the fixing annulus (100) of the fixed sleeve (64), blocking mechanism comprising a series of holes (300) of axes parallel to the axis XX' passing through the fixing annulus (100) of the fixed sleeve (64) and distributed evenly about the axis AA' and opening in the region of the flange (140) of the mobile sleeve (66), characterized in that it comprises a handle (320) having cylindrical rods (322) secured to the handle (320) and distributed on the said handle in such a way that a rod enters a respective hole of the fixing annulus (100), pressure applied to the handle and transmitted via the rods to the flange compressing the locking helical spring (150) in order to reset the locking device.
  17. Tool for resetting the locking of the locking mechanism of the steering section according to Claim 6 when the helical spring has relaxed between the flange of the mobile sleeve and the fixing annulus of the fixed sleeve, the flange (140) of the mobile sleeve (66) comprising a series of threaded holes (400) with axes parallel to the axis XX' and distributed evenly about the axis AA', characterized in that it comprises a handle having cylindrical rods secured by one of their ends to the said handle, the other, free, ends of the rods being threaded so that they can be screwed into the threaded holes of the flange (140) of the mobile sleeve and secured to the handle, a pulling force being applied to the handle in order, during the setting, to bring the mobile sleeve (66) back towards the fixing annulus (100), thereby compressing the helical spring (150) in order to reset the locking device.
  18. Guided munition comprising a steering section according to one of Claims 1 to 15.
EP13152424.1A 2012-01-27 2013-01-23 Steering section for guided munition Not-in-force EP2620738B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1200246A FR2986319B1 (en) 2012-01-27 2012-01-27 PILOTAGE TRUNK FOR GUIDED MUNITION

Publications (2)

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EP2620738A1 EP2620738A1 (en) 2013-07-31
EP2620738B1 true EP2620738B1 (en) 2014-05-14

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US (1) US8890043B2 (en)
EP (1) EP2620738B1 (en)
FR (1) FR2986319B1 (en)
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Publication number Publication date
IL224406A (en) 2016-11-30
FR2986319B1 (en) 2014-03-14
EP2620738A1 (en) 2013-07-31
FR2986319A1 (en) 2013-08-02
US20130193265A1 (en) 2013-08-01
US8890043B2 (en) 2014-11-18

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