EP0360186B1 - Dispositif de sécurité pour la fusée d'un projectile à rotation - Google Patents

Dispositif de sécurité pour la fusée d'un projectile à rotation Download PDF

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Publication number
EP0360186B1
EP0360186B1 EP89117206A EP89117206A EP0360186B1 EP 0360186 B1 EP0360186 B1 EP 0360186B1 EP 89117206 A EP89117206 A EP 89117206A EP 89117206 A EP89117206 A EP 89117206A EP 0360186 B1 EP0360186 B1 EP 0360186B1
Authority
EP
European Patent Office
Prior art keywords
rotor
supporting ring
supporting
fuse
ring
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
EP89117206A
Other languages
German (de)
English (en)
Other versions
EP0360186A2 (fr
EP0360186A3 (fr
Inventor
Adolf Bankel
Hans Strauss
Stephan Kerk
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.)
Diehl Verwaltungs Stiftung
Original Assignee
Diehl GmbH and Co
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 Diehl GmbH and Co filed Critical Diehl GmbH and Co
Publication of EP0360186A2 publication Critical patent/EP0360186A2/fr
Publication of EP0360186A3 publication Critical patent/EP0360186A3/fr
Application granted granted Critical
Publication of EP0360186B1 publication Critical patent/EP0360186B1/fr
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
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/20—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a securing-pin or latch is removed to arm the fuze, e.g. removed from the firing-pin
    • F42C15/22—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a securing-pin or latch is removed to arm the fuze, e.g. removed from the firing-pin using centrifugal force

Definitions

  • the invention relates to a safety device for a swirl projectile detonator according to the preamble of claim 1.
  • Malfunctions can result from the uneven masses of the U-shaped retaining ring.
  • the launch acceleration and the swirl can tilt the retaining ring during the return and opening stroke in the radial groove on the housing side in such a way that the legs prevent the rotor from absorbing the swirl necessary for the function.
  • the retaining ring can jam in its rearward position due to an unintentional impact and lock the rotor securely. In both cases there are explosive duds after firing.
  • the object of the invention is to provide a swirl projectile detonator consisting of a few parts, which functions safely when the swirl projectile is fired, by releasing the rotor and which ensures re-securing of the rotor even after rough handling.
  • Essential for the invention are the retaining ring which bears against the rotor with radial prestress and which, by means of its seat on the conical centering mandrel, non-positively fixes the rotor in the igniter housing.
  • the retaining ring allows the rotor to be secured again, for example in drop tests with reduced requirements up to approx. 6000 g or impact loads when handling a projectile.
  • the almost closed retaining ring supports the rotor in the radial direction on the igniter housing.
  • the inertial forces of the rotor are derived from the retaining ring in the igniter housing.
  • Adverse deformations of the retaining ring cannot occur due to its relatively high section modulus.
  • a securing device 1 provides a retaining ring 2 on a conical centering mandrel 3 within a conical annular space 30 of a detonator housing 7.
  • the retaining ring 2 is resiliently pretensioned on the centering mandrel 3 and presses a spherical rotor 5 via an end face 11 into a spherical expansion 20 within a bore 8 of the igniter housing 7.
  • the rotor 5 has a detonator 15, an annular groove 4 with the end face 11 and a base 10 and a fixing cone 16 for a securing sleeve 17.
  • An annular gap 19 lies between the base 10 and the retaining ring 2.
  • the retaining ring 2 is provided with an inner cone 9, a radial surface 51 and with an outer cone 12. It is resiliently biased via a slot 29 (FIG. 2). According to FIG. 2, it has a keyway profile, as a result of which there are inner support tabs 25 with recesses 26 therebetween.
  • the support tabs 25 have curved support surfaces 27 corresponding to the annular groove 4.
  • a ring 28 carries the support tabs 25, the ring 28 being separated by a slot 29.
  • the retaining ring 2 consists of a tough material with a certain initial elasticity corresponding to the width of the slot 29 (Fig. 2) and high breaking strength. Suitable materials are beryllium, aluminum and steel.
  • the securing device 1 of a swirl igniter (not shown further) reacts to the launch acceleration acting in the direction of arrow 50 by an axial stroke of the retaining ring 2 into the position according to FIG. 4.
  • the retaining ring 2 consists of a beryllium bronze. This material ensures that, due to the centrifugal forces, it completely contacts the cone 13.
  • the webs 14 lying between the support tabs 25 are plastically, that is to say permanently, deformed.
  • the rotor 5 released by the holding ring 2 aligns itself in the position shown in FIG. 4 due to its center of gravity, the securing sleeve 17 being pushed back by the fixing cone 16.
  • the spherical recesses 20, 21 serve as plain bearings.
  • the rotor 5 is locked in the focus shown in this figure by means not shown.
  • the ignition needle 18 strikes the detonator 15 in a known manner. Its ignition energy then initiates a transfer charge 52. If a shock is exerted on the safety device 1 according to arrow 50 during a drop test or rough handling, the retaining ring lifts 2 slightly away from the rotor 5 and, after the impact, will resume its position on the rotor 5 as shown in FIG. 1 due to its spring force.
  • the securing sleeve 17 ensures that the rotor 5 remains in the safe position according to FIG. 1 in the phase in which the retaining ring 2 is lifted off the rotor.
  • the spring-loaded mounting of the rotor 5 by the retaining ring 2 is also advantageous. This creates a gap 49 in that the rotor 5 is pressed into the recess 20 in the igniter housing 7. In the event of shock loads, there is therefore the possibility for the rotor 5 of a spring-damped misalignment within the bore.
  • the ignition threshold of the detonator 15 in the case of shock loads is thus substantially lower than in the case of detonators according to the prior art.
  • Suitable materials for the retaining ring 2 are aluminum or steel.
  • the required material properties are high breaking strength and high toughness.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Toys (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Claims (3)

  1. Dispositif de sécurité (1) pour un allumeur de projectile à rotation, avec un corps d'allumeur (17) et un corps de palier (22), dans lequel un rotor (5) sphérique est monté avec une mobilité en rotation et une rainure radiale (13) y étant creusée, le rotor (5) présentant un perçage avec un détonateur (15) inséré à l'intérieur et une gorge annulaire (4) s'étendant sur une zone périphérique, dans un plan décalé axialement par rapport à la rainure radiale (13) et dans laquelle une bague de maintien (2) fendue est susceptible d'être ouverte par écartement par écartement est insérée avec un profil rainuré comportant des languettes d'appui (25) intérieures et des éléments d'appui (27) et plusieurs nervures (14) à possibilité de déformation permanente, la bague de maintien (2) libérant le rotor (5) maintenu en position armée, une fois faite la mise à feu du projectile, par déplacement axial sous l'effet des efforts axiaux et de rotation et avec agrandissement radial, le rotor (5) pouvant pivoter en position armée avec le détonateur (15), après sa libération,
    caractérisé en ce que,
    la bague de maintien (2) est maintenue en plus par un mandrin de centrage (3) conique situé côté boîtier, et appuie sur une face frontale (11) de sa gorge annulaire (4) sous l'effet d'une précontrainte axiale, la bague de maintien (2) présentant un cône intérieur (9) en correspondance du mandrin de centrage (3) conique et appuyant par un cône extérieur (12) sur un cône intérieur (13) situé côté boîtier,
    le profil de rainure de la bague de maintien (2) est réalisée sous forme de profil à rainure cunéiforme, les languettes d'appui intérieures (25) avec les phases d'appui (27) étant réparties régulièrement, une bague (28) extérieure pourvue d'une fente (29) présentant les nervures déformables de même section transversale et
    la bague de maintien (2) ayant au fond (10) de la gorge annulaire (4) un interstice annulaire (19).
  2. Dispositif de sécurité selon la revendication 1, caractérisé en ce que la bague de maintien (2) siège en position armée, sous l'effet d'une précontrainte élastique dans la direction centripète, sur le mandrin de centrage (3).
  3. Dispositif de sécurité selon la revendication 1, caractérisé en ce que lors de l'enlèvement de la sûreté, pour recevoir puis fixer la bague de maintien (2) écartée dans le boîtier d'allumeur (7), la rainure radiale est prévue sous forme d'espace annulaire conique dont la largeur correspond à peu près au double de l'épaisseur de la bague de maintien.
EP89117206A 1988-09-20 1989-09-18 Dispositif de sécurité pour la fusée d'un projectile à rotation Expired - Lifetime EP0360186B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3831862A DE3831862A1 (de) 1988-09-20 1988-09-20 Sicherungseinrichtung fuer einen drallgeschosszuender
DE3831862 1988-09-20

Publications (3)

Publication Number Publication Date
EP0360186A2 EP0360186A2 (fr) 1990-03-28
EP0360186A3 EP0360186A3 (fr) 1992-01-08
EP0360186B1 true EP0360186B1 (fr) 1995-12-06

Family

ID=6363293

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89117206A Expired - Lifetime EP0360186B1 (fr) 1988-09-20 1989-09-18 Dispositif de sécurité pour la fusée d'un projectile à rotation

Country Status (3)

Country Link
US (1) US4942816A (fr)
EP (1) EP0360186B1 (fr)
DE (2) DE3831862A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5243912A (en) * 1991-12-09 1993-09-14 General Electric Co. Arming delay, dual environment safe, fuze
ES2135987B1 (es) * 1995-04-04 2000-05-16 Fabricaciones Extremenas S A F Mecanismo de seguridad y armado para espoletas en proyectiles giroestabilizados.
EP1278039B8 (fr) * 2001-07-16 2006-03-15 RWM Schweiz AG Dispositif de sécurité et d'armement et son application
DE102005003942B4 (de) * 2005-01-28 2007-04-12 Junghans Feinwerktechnik Gmbh & Co. Kg Sicherungseinrichtung für einen Drallgeschosszünder
FR3039267B1 (fr) * 2015-07-24 2017-07-14 Nexter Munitions Dispositif de securite et d'armement pour une fusee d'ogive et fusee comportant un tel dispositif
US12180960B2 (en) 2023-05-15 2024-12-31 Spherical Rotors Inc. Rotary positive displacement device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3608494A (en) * 1969-03-05 1971-09-28 Gen Electric Time delay fuse
US3595169A (en) * 1969-09-18 1971-07-27 Gen Electric Time delay fuze
DE2539750C3 (de) * 1975-09-06 1980-06-19 Diehl Gmbh & Co, 8500 Nuernberg Sicherungseinrichtung für einen Drallgeschoßzünder
DE3049082C2 (de) * 1980-12-24 1984-08-23 Diehl GmbH & Co, 8500 Nürnberg Sicherungseinrichtung für einen Zünder
DE3262029D1 (en) * 1981-06-30 1985-03-07 Oerlikon Buehrle Ag Safety means for a fuze of a spin-stabilised projectile
US4480551A (en) * 1983-06-08 1984-11-06 Whittaker Corporation Point-detonating variable time-delayed fuze
DE3435402A1 (de) * 1984-09-27 1986-04-03 Gebrüder Junghans GmbH, 7230 Schramberg Kugelfoermiger sicherungsrotor eines drallgeschosszuenders

Also Published As

Publication number Publication date
DE58909527D1 (de) 1996-01-18
DE3831862A1 (de) 1990-03-22
EP0360186A2 (fr) 1990-03-28
US4942816A (en) 1990-07-24
DE3831862C2 (fr) 1991-06-06
EP0360186A3 (fr) 1992-01-08

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