EP0539257A1 - Trägergeschoss - Google Patents

Trägergeschoss Download PDF

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Publication number
EP0539257A1
EP0539257A1 EP92402725A EP92402725A EP0539257A1 EP 0539257 A1 EP0539257 A1 EP 0539257A1 EP 92402725 A EP92402725 A EP 92402725A EP 92402725 A EP92402725 A EP 92402725A EP 0539257 A1 EP0539257 A1 EP 0539257A1
Authority
EP
European Patent Office
Prior art keywords
piston
load
warhead
clearances
shell
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.)
Granted
Application number
EP92402725A
Other languages
English (en)
French (fr)
Other versions
EP0539257B1 (de
Inventor
Gérard Sauvestre
Dominique Dion
Régis Aumasson
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
Publication of EP0539257A1 publication Critical patent/EP0539257A1/de
Application granted granted Critical
Publication of EP0539257B1 publication Critical patent/EP0539257B1/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
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/36—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information
    • F42B12/56—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information for dispensing discrete solid bodies
    • F42B12/58—Cluster or cargo ammunition, i.e. projectiles containing one or more submissiles
    • F42B12/62—Cluster or cargo ammunition, i.e. projectiles containing one or more submissiles the submissiles being ejected parallel to the longitudinal axis of the projectile

Definitions

  • the field of the present invention is that of artillery cargo shells.
  • Cargo shells are projectiles intended to transport a payload, then to release it at a point in their trajectory.
  • the payload may for example be an illuminating load or even be constituted by a stack of several submunitions.
  • Patent FR2363077 describes such a type of shell which comprises an envelope closed at one of its ends by a base and at the other by a warhead.
  • a gas-generating pyrotechnic composition is placed inside the warhead. It is initiated by a chronometric rocket and generates a gas pressure which acts on a piston. The thrust exerted by the piston on the stack of submunitions leads to the separation of the base and the shell of the projectile then the ejection of the submunitions from the shell.
  • Patent US4771696 proposes a cargo shell in which a belt disposed on the envelope ensures the rotation of the latter by the scratches of the barrel of the weapon.
  • the envelope has on its internal cylindrical surface radial notches which cooperate with complementary slots produced on the external surface of a base.
  • the base comes to bear on the payload at a ring which carries notches arranged in an axial direction and cooperating with corresponding slots carried by the payload.
  • the base is held in abutment against the payload by means of a threaded ring.
  • the cargo envelope is generally relatively thin in order to allow the carrying of a large payload, which limits the depth of the radial notches and therefore the mechanical strength of the latter.
  • This extension constitutes an additional part which must be manufactured, supplied and mounted on the shell which is penalizing from a cost point of view. In addition it requires the completion of additional machining to perform the mounting on the base.
  • the shell proposed by the invention can also be easily adapted to a payload of different mass without the mechanical strength of the cargo ship being altered.
  • the subject of the invention is a cargo shell intended to transport at least one load and consisting of an envelope on which is disposed at least one rotating drive belt, envelope closed at one of its ends by a base and at the other by a warhead inside which is disposed a gas-generating pyrotechnic composition intended to come to act on a piston at the time of the ejection of the charge, shell comprising means which ensure the driving in rotation of the charge by the casing and characterized in that these drive means comprise, on the one hand crenals arranged on an extension of the warhead and cooperating with notches arranged on an upper face of the piston, and on the other hand means of rotational connection of the piston and the load itself.
  • the means for rotationally connecting the piston and the load itself comprise at least two clearances carried by a lower face of the piston and arranged opposite similar clearances arranged on the load, these clearances being intended to receive keys which realize the connection in rotation between the load and the piston.
  • the sub-load in contact with the piston also bears on a lower face of the clearances arranged opposite similar clearances fitted on the adjacent sub-load, these clearances being intended also to receive keys which provide the rotational connection between the two sub-loads.
  • a cargo shell 1 consists of a cylindrical steel casing 2, closed at one of its ends (called rear end) by a base 3, and at its other end (called front end) by a warhead 4.
  • the envelope carries at its rear part a belt 5 intended to take the scratches from the barrel of a weapon (not shown) and thus to drive the envelope in rotation.
  • the belt consists of a copper ring welded to the outer surface of the envelope.
  • the warhead carries a chronometric rocket 6 of known type which is programmed mechanically or electronically before the firing of the shell by the weapon. This rocket commands, at the end of the time thus programmed, the ignition of a gas-generating pyrotechnic composition 7.
  • the base 3 is made integral with the casing 2 by means of a thread 8 whose direction of rotation is opposite to that of the scratches in the barrel of the weapon.
  • the warhead 4 is also linked to the casing 2 by a thread 9 whose direction of rotation is identical to that of the scratches in the barrel of the weapon.
  • the envelope here contains a stack of three sub-charges 10a, 10b, 10c which are not described in more detail and which may for example be dispersible mines.
  • the underload 10c disposed at the rear of the shell is supported on the base 3, the front underload 10a is in contact with a piston 11, the median underload 10b being in contact with the other two.
  • the piston 11 separates the stack of sub-charges from a cavity 12 internal to the warhead 4. This piston is intended to receive the pressure of the gases generated by the combustion of the pyrotechnic charge 7.
  • FIGS. 2a and 2b show the warhead 4 in more detail.
  • the latter comprises at its front part a tapping 15, intended to receive the time rocket 6, and at its rear part 4 an extension 16.
  • This extension carries the thread 9, which allows the warhead and the shell of the shell to be secured, as well as four slots 13 regularly angularly distributed and separated by notches 14.
  • the warhead also carries on its internal surface a thread 26 intended to receive a ring 25 (see FIG. 1), the function of which will be specified later.
  • Figures 3a, 3b and 3c show the piston 11 in detail.
  • the latter consists of a cylindrical plate whose external diameter is substantially equal to the internal diameter of the shell of the shell.
  • the external cylindrical surface of the piston 11 carries a groove 23 which is intended to receive a seal (not shown) which will provide a seal against the gases generated by the pyrotechnic composition 7.
  • the front face 19 of the piston 11 (shown in FIG. 3b) carries four slots 17 separated by notches 18.
  • the slots 17 and notches 18 are intended to cooperate with the slots 13 and notches 14 carried by the warhead so as to ensure the rotational connection of the warhead 4 and the piston 11.
  • the widths of the notches 18 carried by the piston 11 will be equal to the widths of the slots 13 carried by the warhead 4.
  • the rear face 20 of the piston 11 (shown in FIG. 3c) carries two recesses 21 arranged at the external diameter and symmetrically to one another relative to a radial plane (P) of the piston.
  • the underloads also have, arranged at their front and rear faces, clearances of the same geometry and the same angular arrangement as those made on the piston.
  • the clearances are intended to receive keys 22 which ensure the rotational driving of the front underload 10a by the piston 11.
  • Keys 22 are also arranged at the clearances arranged between the different sub-loads and thus ensure the rotational driving of the median sub-load 10b by the front sub-load 10a and that of the rear sub-load 10c by the median underload 10b.
  • the keys 22 (see FIG. 3d) have a shape complementary to those of the recesses 21 and are therefore delimited by a flat surface 22a and a cylindrical surface portion 22b with a diameter substantially equal to the external diameter of the piston 11.
  • the thickness (e) of the keys is substantially equal to the sum of the depths (h) of the two clearances inside which it is arranged (see FIG. 3a).
  • the total height of the stack is chosen so that there remains an axial clearance between the upper face 19 of the piston 11 and the threaded ring 25 ( Figure 1).
  • This clearance is canceled after assembly by means of the threaded ring 25.
  • This ring is screwed through the opening of the warhead intended to receive the rocket 6 so that it comes into contact with the upper face 19 of the piston 11 and places the stack of underloads in abutment on the base.
  • a suitable tool will be necessary to allow the screwing of the ring 25 through the opening.
  • notches will be provided on the internal surface of the ring in order to facilitate its entrainment by a tightening tool.
  • the ring 25 thus catches up with the axial play in mounting the stack of underloads.
  • the slots and notches of the warhead and the piston will be given depths greater than the axial mounting clearance. This is so that after catching the clearance by the ring, the rotational connection of the warhead and the piston is still effective.
  • the belt 5 will rotate the casing 2 which itself drives the warhead 4 by threading.
  • the warhead will drive the piston 11 by means of the slots and notches, the piston causing the upper underload 10a by means of the keys 22 and the clearances 21.
  • Each underload also causing the adjacent underload by means of keys 22.
  • the shell according to the invention thus ensures the joining of the envelope and the payload without requiring complex machining of the base and without weakening the thickness of the envelope 2 in line with the base.
  • the shell according to the invention is easily adaptable to carrying payloads of different masses.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
EP92402725A 1991-10-22 1992-10-06 Trägergeschoss Expired - Lifetime EP0539257B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9113001A FR2682754B1 (fr) 1991-10-22 1991-10-22 Obus cargo.
FR9113001 1991-10-22

Publications (2)

Publication Number Publication Date
EP0539257A1 true EP0539257A1 (de) 1993-04-28
EP0539257B1 EP0539257B1 (de) 1996-05-29

Family

ID=9418169

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92402725A Expired - Lifetime EP0539257B1 (de) 1991-10-22 1992-10-06 Trägergeschoss

Country Status (4)

Country Link
US (1) US5233127A (de)
EP (1) EP0539257B1 (de)
DE (1) DE69211089D1 (de)
FR (1) FR2682754B1 (de)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4429292C2 (de) * 1994-08-18 1998-04-09 Rheinmetall Ind Ag Drallstabilisiertes Trägergeschoß
FR2741143B1 (fr) 1995-11-13 1998-01-02 Giat Ind Sa Dispositif de maintien d'un revetement d'une charge generatrice de noyau
US6470805B1 (en) * 2001-04-30 2002-10-29 The United States Of America As Represented By The Secretary Of The Navy Fire retardant bio-friendly practice munition
FR2862378B1 (fr) * 2003-11-17 2007-11-23 Giat Ind Sa Obus explosif ayant une tenue aux chocs amelioree
FR2960959B1 (fr) * 2010-06-04 2012-05-25 Nexter Munitions Dispositif cargo a ouverture differee
US8844444B1 (en) * 2010-09-02 2014-09-30 The United States Of America As Represented By The Secretary Of The Army Reusable test projectile
US9784544B2 (en) * 2013-08-20 2017-10-10 Bae Systems Plc Frangible munition
EP3036498B1 (de) 2013-08-20 2017-06-07 BAE Systems PLC Rauchnutzlastvorrichtung
AU2014310465B2 (en) * 2013-08-20 2017-12-14 Bae Systems Plc Common carrier munition
GB2517448B (en) * 2013-08-20 2017-04-12 Bae Systems Plc Frangible munition
WO2015025145A1 (en) 2013-08-20 2015-02-26 Bae Systems Plc Illumination munition
RU2667172C1 (ru) * 2017-09-28 2018-09-17 Акционерное общество "Научно-производственное объединение "СПЛАВ" Разделяющаяся головная часть кассетного типа
DE102020116228B3 (de) 2020-06-19 2021-12-23 Rheinmetall Waffe Munition Gmbh Geschoss und Munition

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2363077A1 (fr) * 1976-08-23 1978-03-24 Foerenade Fabriksverken Dispositif d'ejection et de separation de plusieurs elements loges dans une ogive ou analogue
EP0395456A1 (de) * 1989-03-22 1990-10-31 GIAT Industries Verbindungsvorrichtung zwischen zwei Teilstücken eines drallstabilisierten Geschosses

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2454281A (en) * 1945-11-01 1948-11-23 Clarence C Hicks Antipersonnel artillery mine
US4771696A (en) * 1987-05-18 1988-09-20 John Smolnik Base closure for thinwall carrier projectile

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2363077A1 (fr) * 1976-08-23 1978-03-24 Foerenade Fabriksverken Dispositif d'ejection et de separation de plusieurs elements loges dans une ogive ou analogue
EP0395456A1 (de) * 1989-03-22 1990-10-31 GIAT Industries Verbindungsvorrichtung zwischen zwei Teilstücken eines drallstabilisierten Geschosses

Also Published As

Publication number Publication date
FR2682754A1 (fr) 1993-04-23
DE69211089D1 (de) 1996-07-04
US5233127A (en) 1993-08-03
EP0539257B1 (de) 1996-05-29
FR2682754B1 (fr) 1995-03-03

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