EP0354088B1 - Vorrichtung zum Öffnen der Flügelschäfte eines Geschosses - Google Patents

Vorrichtung zum Öffnen der Flügelschäfte eines Geschosses Download PDF

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Publication number
EP0354088B1
EP0354088B1 EP89402060A EP89402060A EP0354088B1 EP 0354088 B1 EP0354088 B1 EP 0354088B1 EP 89402060 A EP89402060 A EP 89402060A EP 89402060 A EP89402060 A EP 89402060A EP 0354088 B1 EP0354088 B1 EP 0354088B1
Authority
EP
European Patent Office
Prior art keywords
pinholder
piston
locking element
locking
striker
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.)
Expired - Lifetime
Application number
EP89402060A
Other languages
English (en)
French (fr)
Other versions
EP0354088A1 (de
Inventor
Claude Boutet
Daniel Guenin
Jean Rat
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.)
Giat Industries SA
Original Assignee
Giat Industries SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Giat Industries SA filed Critical Giat Industries SA
Priority to AT89402060T priority Critical patent/ATE78334T1/de
Publication of EP0354088A1 publication Critical patent/EP0354088A1/de
Application granted granted Critical
Publication of EP0354088B1 publication Critical patent/EP0354088B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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 present invention relates to a device for opening the tail of an artillery projectile.
  • the deploying tail unit has the advantage of being less bulky in length than a fixed tail unit which, to be effective, must be pushed far behind the body of the projectile; in fact, for a smaller footprint, it allows better stabilization, therefore greater precision.
  • this type of empennage allows the shooting by means of a tube with the caliber of the projectile.
  • document FR-A-2 221 707 discloses an artillery projectile tail opening device, of the type defined in the preamble of claim 1 and comprising a mounting body, a control member opening axially movable relative to said body from a first position where it keeps the tail closed to a second position where it keeps the tail open, and control means for said control member, said control means comprising a piston sensitive to gas pressure in the launcher tube and a gas generator arranged to bring the opening control member from its first to its second position.
  • the gases act on the fins by means of differential pistons subjected in the tube to the pressure of the propellant gases of the projectile exerted on a large surface of this piston, the gases tending to open the fins n ' acting only on a significantly smaller surface.
  • the thrust due to the propellant gases is very significantly greater and therefore keeps the tail closed.
  • the present invention aims to overcome these drawbacks by providing a simple and therefore inexpensive device allowing an almost instantaneous opening of the tail unit as soon as it leaves the tube, and only outside the tube, in a perfectly symmetrical manner.
  • the invention also aims to provide a device having all the guarantees of storage and handling security.
  • the striker in the storage position, the striker is kept in the locked position in the striker holder. Only the considerable pressure (of the order of 2000 bars) prevailing in the barrel chamber at the start of the shot can oppose the holding means, and thus bring the assembly constituted by the striker holder the striker and the locking member in the armed position. Again, there is no risk of premature opening of the tail since the striker holder remains locked until the elastic means can oppose the pressure prevailing in the tube. However, when the projectile is about to leave this tube, the pressure is still extremely high (of the order of 400 bars). It is therefore sufficient to calibrate the spring so that it can only oppose a pressure of a few bars (for example 15 bars) to be absolutely certain that it will not cause the striker to be unlocked before the projectile is completely out of the tube.
  • said locking means comprise at least one claw connected to the striker holder and engaged in the locked position in a corresponding recess of the striker, said claw being held in the recess by a stop surface of the locking member when the striker holder and the locking member are in their first relative position, said abutment surface being erased when the striker holder and the locking member are in their second relative position.
  • said holding means comprise a first shear piece secured to the striker holder and engaged in the storage position in a recess in the control member, two cooperating stops of the member locking and the control member now, in this storage position the striker holder and the locking member in their first relative position.
  • the piston and the locking member are integral, the locking member then exercising the function of thrust member to bring the striker-holder-striker-locking member assembly from its storage position to its position d arming by causing the shearing of the holding means.
  • the elastic means can be produced in the form of a compression spring disposed between the striker and the locking member, and tending to separate them from each other against the action of the piston.
  • the striker holder and the control member may more particularly comprise cooperating abutment surfaces, these abutments being maintained in contact in said cocking position under the action of the piston.
  • the striker holder and the locking member are arranged to slide in a bore of the control member, and the striker is arranged to slide in a bore of the striker holder.
  • the device according to the invention may also comprise a second shear piece integral with the control member, engaged, in the first position of this member, in a recess of the body.
  • the control member can, for the sake of simplicity, form a piston sliding in a bore of the body under the action of the gases of the gas generator, which cause the shearing of the second shearing part.
  • the device of Figure 1 comprises a body 1 provided with a thread 2 for mounting on the base of an artillery projectile or on an intermediate piece. It is substantially symmetrical in revolution around an axis 00.
  • a piston 3 is slidably mounted in an axial bore of the body 1, a shear flange 4 engaged in a peripheral counterbore of the bore and blocked by a bottom plate (not shown) preventing this sliding as long as it is not not sheared.
  • O-rings 5 seal between the piston 3 and the body 1.
  • An actuating member 8 is screwed to the rear of the piston 3 with the interposition of an O-ring seal 9.
  • a locking nut 10 is itself screwed to the rear part of the actuating member 8, for reasons which will be explained below.
  • a countersink in the piston 3 forms an annular groove 11. This groove allows the engagement of a shear flange 12 formed at the periphery of a carrier member - piercer 13 arranged in a bore 14 of the piston 3.
  • An axial bore 16 is formed in the striker holder 13, which comprises in the extension of the surface of this bore elastic branches 17 terminated at their ends by claws 18 (FIG. 2b) extending axially inwards relative at bore 16.
  • the bore 16 also receives a sliding striker 19 comprising at its outer periphery an annular groove 20 of shape complementary to that of the claws 18, so that the claws can engage in the groove.
  • the actuating member 8 also comprises a bore of the same diameter as the bore 14, and coaxial with the latter, in which is disposed a pushing piece 21 whose front part forms a locking member 22 and whose rear part forms a piston rod 23.
  • the locking member 22 has a first bore 24 towards the front and a rear bore and a second bore 25 of smaller diameter.
  • the bore 25 has a diameter such that it forms an abutment surface for the radially outer surfaces of the claws 18, thus preventing the latter from leaving the groove 20 when the front part of the thrust piece 21 is in contact with the rear part of the striker holder 13.
  • an axial bore of the striker receives a compression spring 29 bearing on the one hand on an internal face of this striker, and on the other hand on the bottom of the bores of the thrust piece 21, thus tending to spread the striker of this room.
  • the piston rod 23 carries at its rear end the piston 30 proper, which is arranged in a chamber 31 formed in the actuating member 8 and opening into the open air at its rear part through a plug. maintenance.
  • the piston 30 comprises a front part 30a of reduced diameter allowing a certain radial expansion of the piston and avoiding any jamming of the latter which would prevent the return of the thrust piece 21 and therefore the opening of the tail.
  • a slightly larger diameter portion 31a is provided in its housing in the actuating member 8.
  • the piston 30 has on its front face 30b a coating of a low friction material, in particular PTFE for example with a thickness of 0.1 mm, making it possible to ensure gas tightness.
  • a low friction material in particular PTFE for example with a thickness of 0.1 mm
  • a gas generator 32 is placed in a chamber formed at the front of the piston 3 opposite the striker 19.
  • Figure 3a shows the device described above in its storage position shown in Figure 1, and mounted at the rear part of the base 33 of an artillery projectile deploying tail.
  • This empennage consists of fins 34 rotatably mounted on an axis 35.
  • Each fin has a tooth 36 whose sides are arranged to cooperate with the sides of an annular groove 37 of the control member 15. It will be noted that these sidewalls are formed on the one hand by an external shoulder of the actuating part 8 and on the other hand, by the nut 10. The latter is screwed onto the actuating part 8 so as to adjust the clearance between the two flanks of tooth 36.
  • the groove 37 has an axial position such that it maintains the fins 34 in the folded position towards the axis of the device.
  • the chamber 31 When the projectile is placed in the firing position in the core of a barrel, the chamber 31 is therefore in communication with the chamber of this barrel. When the blow is initiated, an extremely high pressure develops in this chamber, thus pushing the part 21 forward and causing the shearing of the flange 12 of the striker holder 13.
  • the assembly constituted by the thrust piece 21, the striker holder 13 and the striker 19 are thus propelled in one piece towards the front, leaving in place the flange 12. This movement ceases when the assembly is blocked in the cocking position by two cooperating stops formed respectively from the front face 38 of the firing pin holder and a shoulder 39 produced at the front end of the bore 14. The assembly is thus held in abutment as shown in the FIG. 3b as long as there is sufficient pressure in chamber 31.
  • the abutment surface 25 is erased in front of the claws 18 of the striker holder 13.
  • the spring 29 pushes not only the pushing piece 21 backwards but also the striker 19 forwards, including the rear part 40 pushes the claws 18 axially outwards in the bore 24 under the combined action of two inclined planes 41 and 42 formed respectively on the claws 18 and on the rear flank of the groove 20 (fig.2b).
  • the striker 19 is thus released from the striker holder 13 and is propelled forward where it strikes the gas generator 32 as shown in FIG. 3c.
  • the fin 34 remains immobilized in the deployed position due to the jamming of the abutment surfaces 43, 44 on the member 15.
  • This simple, therefore inexpensive embodiment device ensures extremely rapid opening of the tail (less than 5 milliseconds) and effective locking of the fins both in the folded position and in the open position.
  • Another advantage of the device lies in the high level of security that it provides, due to the importance of the forces necessary for its activation, excluding any risk of opening following falls or other rough handling.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Damping Devices (AREA)
  • Manufacture Of Iron (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Catching Or Destruction (AREA)
  • Air-Flow Control Members (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Toys (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Farming Of Fish And Shellfish (AREA)

Claims (10)

1. Leitwerköffnungsvorrichtung von Artilleriegeschossen, bestehend aus einem Montagekörper (1), einem gegenüber dem besagten Körper axial beweglichen Öffnungssteuerorgan (15) für eine erste Stellung, in der es das Leitwerk geschlossen hält, und eine zweite Stellung, in der es das Leitwerk geöffnet hält, und Kontrollmittel des besagten Steuerorgans besteht, wobei die besagten Kontrollmittel aus einem, gegenüber dem Gasdruck im Abschussrohr empfindlichen Kolben (30) und einem Gasgenerator (32) bestehen, der dazu dient, das Öffnungssteuerorgan aus seiner ersten in seine zweite Stellung zu versetzen, dadurch gekennzeichnet, dass die besagten Kontrollmittel aus folgenden Bestandteilen bestehen:
- einem Schlagbolzen (19) für den Gasgenerator,
- einem Schlagbolzenträger (13), mit dem der Schlagbolzen über entriegelbare Sperrvorrichtungen (18, 20) verbunden ist,
- einem Verrriegelungsorgan (22) zur Aufrechterhaltung der verriegelten Sperrvorrichtungen in einer ersten Relativstellung des Schlagbolzenträgers und des Verriegelungsorgans und zu ihrer Entriegelung in einer zweiten Relativstellung,
- Haltemittel (12), um die Einheit Schlagbolzen-Schlagbolzenträger-Verriegelungsorgan gegenüber dem Steuerorgan in einer Lagerungsstellung zu bewahren, wobei der Schlagbolzenträger und das Verriegelungsorgan in ihrer ersten Relativstellung verbleiben.
- dem besagten Kolben, um die besagte Einheit gegen die Aktion der Haltemittel aus der besagten Lagerungsstellung in eine Bewaffnungsstellung zu versetzen, wenn der auf den besagten Kolben ausgeübte Druck einen ersten vorbestimmten Wert übersteigt, unter gleichzeitiger Aufrechterhaltung des Schlagbolzenträgers und des Verriegelungsorgans in ihrer ersten Relativstellung solange der besagte Druck höher ist als ein zweiter vorbestimmter Wert, und
- Federmittel (29), um den Schlagbolzenträger und das Verriegelungsorgan in ihre zweite Relativstellung zu versetzen und den Schlagbolzen dazu zu veranlassen, den Gasgenerator gegen die Aktion des besagten Kolbens zu stossen, wenn der besagte Druck unter dem besagten zweiten vorbestimmten Wert liegt.
2. Vorrichtung gemäss dem Anspruch 1, dadurch gekennzeichnet, dass die besagten Sperrmittel zumindest aus einem an den Schlagbolzen angeschlossenen Greifer (18) bestehen, der in Verriegelungsstellung in eine entsprechende Verstärkung (20) des Schlagbolzens eingelassen ist, wobei der besagte Greifer durch eine Anschlagfläche (25) des Verriegelungsorgan in der Verstärkung festgehalten wird, wenn sich der Schlagbolzenträger und das Verriegelungsorgan in ihrer ersten Relativstellung befinden, wobei die besagte Anschlagfläche in den Hintergrund tritt, wenn sich der Schlagbolzenträger und das Verriegelungsorgan in ihrer zweiten Relativstellung befinden.
3. Vorrichtung gemäss einem der vorangehenden Ansprüche 1 und 2, dadurch gekennzeichnet, dass die besagten Haltemittel aus einem ersten, mit dem Schlagbolzenträger verbundenen Abscherteil bestehen, das in der Lagerungsstellung in eine Verstärkung (11) des Steuerorgans eingeführt ist, wobei zwei zusammenwirkende Anschläge (27, 28) des Verriegelungsorgans und des Steuerorgans den Schlagbolzenträger und das Verriegelungsorgan in dieser Lagerungsstellung in ihrer ersten Relativstellung halten.
4. Vorrichtung gemäss einem der vorangehenden Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Kolben und das Verriegelungsorgan aus einem Stück bestehen.
5. Vorrichtung gemäss einem der vorangehenden Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Federmittel aus einer zwischen dem Schlagbolzen und dem Verriegelungorgan angeordneten Druckfeder bestehen, die dazu neigt, diese beiden Bestandteile gegen die Aktion des Kolbens auf Abstand zu halten.
6. Vorrichtung gemäss einem der vorangehenden Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Schlagbolzenträger und das Steuerorgan zusammenwirkende Anschlagflächen (38, 39) aufweisen, wobei diese Anschläge in der besagten Bewaffnungsstellung unter der Kolbenaktion in Kontakt gehalten werden.
7. Vorrichtung gemäss einem der vorangehenden Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Schlagbolzenträger und das Verriegelungsorgan so angeordnet sind, dass sie in einer Bohrung (14) des Steuerorgans gleiten.
8. Vorrichtung gemäss einem der vorangehenden Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der Schlagbolzen so angeordnet ist, dass er in einer Bohrung (16) des Schlagbolzenträgers gleitet.
9. Vorrichtung gemäss einem der vorangehenden Ansprüche 1 bis 8, dadurch gekennzeichnet, dass sie ein mit dem Steuerorgan verbundenes Abscherteil (4) besitzt, das in der ersten Stellung dieses Organs in eine Verstärkung des Körpers eingeführt ist.
10. Vorrichtung gemäss einem der vorangehenden Ansprüche 1 bis 9, dadurch gekennzeichnet, dass das besagte Steuerorgan einen unter der Aktion der Gase des Gasgenerators in einer Bohrung des Körpers gleitenden Kolben bildet.
EP89402060A 1988-08-04 1989-07-20 Vorrichtung zum Öffnen der Flügelschäfte eines Geschosses Expired - Lifetime EP0354088B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89402060T ATE78334T1 (de) 1988-08-04 1989-07-20 Vorrichtung zum oeffnen der fluegelschaefte eines geschosses.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8810551A FR2635178B1 (fr) 1988-08-04 1988-08-04 Dispositif d'ouverture d'empennage pour obus
FR8810551 1988-08-04

Publications (2)

Publication Number Publication Date
EP0354088A1 EP0354088A1 (de) 1990-02-07
EP0354088B1 true EP0354088B1 (de) 1992-07-15

Family

ID=9369115

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89402060A Expired - Lifetime EP0354088B1 (de) 1988-08-04 1989-07-20 Vorrichtung zum Öffnen der Flügelschäfte eines Geschosses

Country Status (6)

Country Link
EP (1) EP0354088B1 (de)
AT (1) ATE78334T1 (de)
CA (1) CA1334908C (de)
DE (1) DE68902108T2 (de)
FR (1) FR2635178B1 (de)
IL (1) IL91102A (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2702833B1 (fr) * 1993-03-18 1995-05-12 Giat Ind Sa Dispositif d'étanchéité au gaz de propulsion pour munitions d'artillerie.
US8338769B1 (en) * 2008-02-07 2012-12-25 Simmonds Precision Products, Inc. Pyrotechnic fin deployment and retention mechanism
FR2946423A1 (fr) * 2009-06-05 2010-12-10 Tda Armements Sas Dispositif d'ouverture et de verrouillage d'un empennage de munition
US9086259B2 (en) * 2011-08-26 2015-07-21 Bae Systems Information And Electronic Systems Integration Inc. Apparatus for deploying stowed control surfaces of a projectile
FR2986319B1 (fr) * 2012-01-27 2014-03-14 Tda Armements Sas Troncon de pilotage pour munition guidee

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB188377A (en) * 1921-08-04 1922-11-06 Armstrong Whitworth Co Eng Improvements in percussion fuses for projectiles
BE552288A (de) * 1953-10-20
GB789761A (en) * 1955-09-16 1958-01-29 Soc Tech De Rech Ind Improvements in projectile fuzes
FR2221707B1 (de) * 1973-03-14 1976-04-30 France Etat

Also Published As

Publication number Publication date
IL91102A (en) 1992-06-21
CA1334908C (fr) 1995-03-28
ATE78334T1 (de) 1992-08-15
DE68902108D1 (de) 1992-08-20
IL91102A0 (en) 1990-03-19
FR2635178B1 (fr) 1990-10-12
DE68902108T2 (de) 1993-01-14
FR2635178A1 (fr) 1990-02-09
EP0354088A1 (de) 1990-02-07

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