EP3121553B1 - Sicherungs- und scharfstellungseinrichtung für einen geschosszünder, und zünder, der eine solche vorrichtung umfasst - Google Patents

Sicherungs- und scharfstellungseinrichtung für einen geschosszünder, und zünder, der eine solche vorrichtung umfasst Download PDF

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Publication number
EP3121553B1
EP3121553B1 EP16177301.5A EP16177301A EP3121553B1 EP 3121553 B1 EP3121553 B1 EP 3121553B1 EP 16177301 A EP16177301 A EP 16177301A EP 3121553 B1 EP3121553 B1 EP 3121553B1
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EP
European Patent Office
Prior art keywords
sleeve
levers
rotor
lever
safety device
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.)
Active
Application number
EP16177301.5A
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English (en)
French (fr)
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EP3121553A1 (de
Inventor
Nicolas Caillaut
Sylvain Jayet
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.)
Nexter Munitions SA
Original Assignee
Nexter Munitions 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 Nexter Munitions SA filed Critical Nexter Munitions SA
Publication of EP3121553A1 publication Critical patent/EP3121553A1/de
Application granted granted Critical
Publication of EP3121553B1 publication Critical patent/EP3121553B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/18—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved
    • F42C15/188—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved using a rotatable carrier
    • F42C15/192—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved using a rotatable carrier rotatable in a plane which is parallel to the longitudinal axis of the projectile
    • F42C15/196—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved using a rotatable carrier rotatable in a plane which is parallel to the longitudinal axis of the projectile by the action of centrifugal or inertia forces on the carrier body, e.g. the carrier having eccentrically mounted weights or eccentric centre of gravity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/005—Combination-type safety mechanisms, i.e. two or more safeties are moved in a predetermined sequence to each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/18—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved
    • F42C15/188—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved using a rotatable carrier
    • F42C15/192—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved using a rotatable carrier rotatable in a plane which is parallel to the longitudinal axis of the projectile
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/24—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein the safety or arming action is effected by inertia means

Definitions

  • the technical field of the invention is that of safety devices and weapons for a rocket intended to equip a gyrating projectile.
  • a projectile rocket comprises in a conventional manner a safety and arming device which is intended to prevent any inadvertent operation of the primer it contains or the projectile on which this rocket is fixed.
  • the patent EP566469 describes a safety device comprising a lead-in rotor maintained misaligned by a socket.
  • the sleeve locks the rotor in the misaligned position by pressing on a flat part of the rotor.
  • the sleeve releases the rotor by moving away by inertia under the effect of the shot.
  • Such a device is suitable for ammunition of medium caliber and is located in the rear part of the projectile at the base.
  • Such a device is not suitable for warhead rockets which comprise a firing pin which is projected on impact on a target towards the rear of the projectile.
  • the invention makes it possible to add a second safety device to an ogive rocket already having a first rotor safety device as described in the patent. FR2533686 .
  • the invention also aims to solve a problem of integration of safety devices for a rocket having a firing pin configuration projected backward on impact.
  • the invention relates to a safety and arming device for a warhead rocket according to independent claim 1, intended for a gyrating projectile, device comprising a lead-in rotor held in a safety position misaligned with respect to a striker by a sleeve supported on a flattened rotor by a spring, characterized in that it comprises a flyweight intended when subjected to the longitudinal acceleration following firing, to exert a thrust force on a first end of at least one lever, the second end of the at least one lever being located under a flange of the sleeve, the thrust force of the counterweight rotating the lever or levers around a pivot point located between the two lever ends, the pivoting of the lever or levers spacing the sleeve of the rotor flat permanently to release the rotation of the latter.
  • the device comprises at least two levers evenly distributed angularly around the sleeve.
  • the levers may be constituted by tabs integral with a washer by their first end, plastically deformable tongues at their junction with the washer.
  • the weight may be annular and may exert its thrust force at the level of the washer.
  • the weight may also include a locking means in the end position when the levers have spread the sleeve of the rotor.
  • the socket may include a groove receiving the second end of the levers when the socket is pressed on the flat, to integrally translate the sleeve and the levers in the safety position of the device.
  • the invention also relates to a gyrating projectile warhead rocket comprising such a safety device.
  • a projectile 100 of medium caliber (that is to say of caliber between 12.7 mm and 75 mm) comprises a projectile body 100a, which has an ogivated part 100b and a fuse 101 fixed at the front tip of the projectile 100 (so-called ogive rocket).
  • This projectile 100 is stabilized on its trajectory thanks to a gyrating movement around its longitudinal axis 7, movement printed to the projectile by means of scratches in a barrel of a weapon (weapon not shown).
  • the rocket 101 has the function of ensuring the triggering of a payload embedded in the body 100a of the projectile such as an explosive for example.
  • the rocket 101 includes a safety and arming device designed to prevent the rocket to trigger the charge inappropriately outside a firing phase of the projectile.
  • This device contains a primer which is kept in the misaligned position by at least two locking means which are released by effects of different environments, a locking means released by the axial firing acceleration and the other released by the acceleration centrifugal consecutive shooting.
  • the rocket 101 comprises a safety device 1 comprising a rotor 2 carrying a primer 3.
  • the rotor 2 is substantially spherical and disposed in a cage 6 and the primer 3 is disposed transversely to the longitudinal axis 7 of the rocket 101.
  • the cage 6 is rotatably mounted relative to the axis 7.
  • the rotor has a flat portion 2a serving as a bearing surface at the end of a sleeve 4.
  • the sleeve 4 is pierced longitudinally so as to allow the passage of a striker 5 which is intended to impact the primer 3 when it is aligned with the striker 5 and as a result of an impact on a target.
  • the first security consists in unlocking the rotor 2 only during a centrifugal acceleration comparable to that caused by the rotation of the projectile around its longitudinal axis when it is actually pulled.
  • radial pins 20 arranged in radial bores of the cage 6 block the rotor 2. They are released from the rotor 2 after the unwinding of a spiral 21 which delays their release so that the unlocking of the rotor 2 occurs only when the projectile has left the barrel of the weapon.
  • the second security is provided by the bushing 4.
  • the bushing 4 By bearing on the flat part 2a, the bushing 4 contributes to preventing the rotor 2 from rotating. In this way the safety device 1 also keeps the rotor 2 gate primer 3 in the safety position, primer 3 misaligned with respect to the striker 5.
  • the sleeve 4 has a collar 4a at its second end facing the front AV of the rocket 101.
  • the sleeve 4 passes through a washer 9 and bears with a central portion of the washer 9 by its lower rearward facing AR of the rocket 101.
  • the face of the washer 9 facing the front of the fuze 101 supports, in the vicinity of its outer edge, an annular flyweight 8.
  • the washer 9 comprises radial tabs 10 regularly distributed angularly and extending towards the center of the washer 9.
  • These tongues 10 constitute levers 10 whose first ends are integral with the washer 9 and the second ends are disjointed one of the others and are located under the lower face of the flange 4a of the sleeve 4 visible to the figures 2 , 3 and 5 .
  • the second end of the tongues 10 is placed in a groove 22 of the sleeve 4 so as to translate the sleeve 4 in translation relative to the second ends of the levers 10.
  • the sleeve 4 will not leave its safety position accidentally during the manipulations of the rocket 101 and will remain supported on the flat portion 2a of the rotor 2 in the safety position.
  • the device 1 comprises a centering ring 11 intended to ensure the linear guide of the sleeve 4 along the longitudinal axis 7 of the device 1.
  • the edge of the centering ring 11 located under the levers 10 and between the first and the second end each lever 10 is a circular area on which each lever is supported at a tipping point 12, for pivoting each lever 10 around this point 12 according to the action applied to the ends of the levers 10.
  • the second end of the levers 10 is wedged between the underside of the flange 4a and the centering ring 11.
  • the weight 8 is able to translate longitudinally but is held in position by a ring ring 13 part of his section in a groove 14 of the weight 8 and partly in a first recess 15a carried by a cylindrical extension 17 of the ring 11 and located opposite the groove 14.
  • the ring 13 is narrowed in the groove 14 by the translational action of the weight 8 and the compression exerted by the inner wall of the cylindrical extension 17 of the ring 11.
  • the weight 8 exerts a thrust force on the washer 9 at the second ends of the levers 10.
  • the levers 10 rotate about their tipping points 12, thereby producing a lever arm effect which causes a movement of the first end of the levers toward the front AV of the device 1.
  • levers are not limiting, just as a single lever could suffice. But the implementation of several levers distributed regularly ensures safer operation.
  • the washer 9 and levers will be made of a plastically deformable material under the thrust force of the flyweight 8 to prevent the levers and especially the sleeve return to their original position once the projectile pulled.
  • the inner wall of the extension 17 of the ring 11 may comprise a second recess 15b intended to allow the expansion of the ring rod 13.
  • the recess 15b and the rod 13 thus form a means for locking the weight 8 on its end position.
  • the outer portion of the washer 9 has the function of ensuring the connection between the levers 10 but is not essential. It could indeed position each lever 10 individually and pivotally relative to the ring 11.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Claims (7)

  1. Sicherheits- und Waffenvorrichtung (1) für einen Gefechtskopfzünder (101) für ein gyrierendes Geschoss, wobei die Vorrichtung (1) einen Rotor (2) umfasst, der eine Zündkapsel (3) trägt, die in einer Sicherheitsposition gehalten wird, in der sie nicht durch eine Hülse (4) auf einen Schlagbolzen (5) ausgerichtet wird, die an einem Flachstück (2a) des Rotors (2) anliegt, wobei die Vorrichtung dadurch gekennzeichnet ist, dass sie einen Aufsatz (8) umfasst, der, wenn er nach dem Abschuss eine Längsbeschleunigung erfährt, eine Schubkraft auf ein erstes Ende von wenigstens einem Hebel (10) ausübt, wobei sich das zweite Ende des wenigstens einen Hebels (10) unter einem Flansch (4a) der Hülse (4) befindet, wobei die Schubkraft des Aufsatzes (8) eine Schwenkung der ein oder mehreren Hebel (10) um einen Schwenkpunkt (12) bewirkt, der sich zwischen den beiden Enden des Hebels (10) befindet, wobei die Schwenkung der ein oder mehreren Hebel (10) die Hülse (4) von dem Flachstück (2a) des Rotors (2) auf permanente Weise verdrängt, um die Rotation des Rotors zuzulassen.
  2. Sicherheitsvorrichtung (1) nach Anspruch 1, dadurch gekennzeichnet, dass sie wenigstens zwei Hebel (10) umfasst, die gleichmäßig winkelmäßig um die Hülse (4) herum verteilt sind.
  3. Sicherheitsvorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Hebel (10) von fest mit einer Scheibe (9) verbundenen Zungen (10) an ihrem ersten Ende gebildet werden, wobei die Zungen (10) an ihrem Übergang mit der Scheibe (9) plastisch verformbar sind.
  4. Sicherheitsvorrichtung (1) nach Anspruch 3, dadurch gekennzeichnet, dass der Aufsatz (8) ringförmig ist und seine Schubkraft an der Scheibe (9) aufbringt.
  5. Sicherheitsvorrichtung (1) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Aufsatz (8) ein Sperrmittel (13, 15b) in der Wegendeposition aufweist, wenn die Hebel (10) von der Hülse (4) des Rotors (5) verdrängt wurden.
  6. Sicherheitsvorrichtung (1) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Hülse (4) eine Auskehlung (22) umfasst, die das zweite Ende der Hebel (10) aufnimmt, wenn die Hülse an dem Flachstück anliegt, um die Hülse (4) und die Hebel (10) in der Sicherheitsposition der Vorrichtung translational zu fixieren.
  7. Gefechtskopfzünder (101) für ein gyrierendes Geschoss, der eine Sicherheitsvorrichtung nach einem der Ansprüche 1 bis 6 umfasst.
EP16177301.5A 2015-07-24 2016-06-30 Sicherungs- und scharfstellungseinrichtung für einen geschosszünder, und zünder, der eine solche vorrichtung umfasst Active EP3121553B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1501604A FR3039267B1 (fr) 2015-07-24 2015-07-24 Dispositif de securite et d'armement pour une fusee d'ogive et fusee comportant un tel dispositif

Publications (2)

Publication Number Publication Date
EP3121553A1 EP3121553A1 (de) 2017-01-25
EP3121553B1 true EP3121553B1 (de) 2017-12-27

Family

ID=54937130

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16177301.5A Active EP3121553B1 (de) 2015-07-24 2016-06-30 Sicherungs- und scharfstellungseinrichtung für einen geschosszünder, und zünder, der eine solche vorrichtung umfasst

Country Status (6)

Country Link
US (1) US10041775B2 (de)
EP (1) EP3121553B1 (de)
ES (1) ES2659813T3 (de)
FR (1) FR3039267B1 (de)
NO (1) NO3121553T3 (de)
PT (1) PT3121553T (de)

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CN114517639A (zh) * 2022-01-24 2022-05-20 厦门中建东北设计院有限公司 填石和碎石土场地的勘探方法
DE102022106883A1 (de) * 2022-03-23 2023-09-28 Rheinmetall Air Defence Ag Sicherungseinheit für einen Zünder, Verwendung der Sicherungseinheit und Verfahren zur Aktivierung eines Zünders mit dieser Sicherungseinheit

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Also Published As

Publication number Publication date
US10041775B2 (en) 2018-08-07
EP3121553A1 (de) 2017-01-25
ES2659813T3 (es) 2018-03-19
NO3121553T3 (de) 2018-05-26
PT3121553T (pt) 2018-02-26
FR3039267A1 (fr) 2017-01-27
US20170138714A1 (en) 2017-05-18
FR3039267B1 (fr) 2017-07-14

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