EP0624774A1 - Sabot for a finstabilized projectile - Google Patents

Sabot for a finstabilized projectile Download PDF

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Publication number
EP0624774A1
EP0624774A1 EP94104252A EP94104252A EP0624774A1 EP 0624774 A1 EP0624774 A1 EP 0624774A1 EP 94104252 A EP94104252 A EP 94104252A EP 94104252 A EP94104252 A EP 94104252A EP 0624774 A1 EP0624774 A1 EP 0624774A1
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EP
European Patent Office
Prior art keywords
sabot
projectile
jacket
segments
discarding sabot
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
EP94104252A
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German (de)
French (fr)
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EP0624774B1 (en
Inventor
Rudolf Rossmann
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RWM Schweiz AG
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Oerlikon Contraves Pyrotec AG
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Publication of EP0624774A1 publication Critical patent/EP0624774A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B14/00—Projectiles or missiles characterised by arrangements for guiding or sealing them inside barrels, or for lubricating or cleaning barrels
    • F42B14/06—Sub-calibre projectiles having sabots; Sabots therefor
    • F42B14/061—Sabots for long rod fin stabilised kinetic energy projectiles, i.e. multisegment sabots attached midway on the projectile
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B14/00—Projectiles or missiles characterised by arrangements for guiding or sealing them inside barrels, or for lubricating or cleaning barrels
    • F42B14/06—Sub-calibre projectiles having sabots; Sabots therefor
    • F42B14/067—Sealing aspects in sabots, e.g. sealing between individual segments of the sabots or sealing between the outer surface of the sabot and the inner surface of the barrel

Definitions

  • the invention relates to a detachable sabot on a wing-stabilized lower-caliber projectile, which can be fired from a weapon barrel provided with swirl grooves, according to the preamble of claim 1.
  • CH-675 769 A5 describes a sabot projectile with a predetermined breaking point on the rear part of the sabot, the rear part having longitudinal slots for segmentation and a ring containing predetermined breaking points in the area of the outside diameter.
  • a hemispherical sealing shell of the sabot jacket is provided at the rear end of the sabot tail. So that the sabot rear part does not disintegrate into its sectors prematurely when the projectile is fired, ie in order to neutralize the gas pressure acting radially outward on the sealing shell, cooperating supporting surfaces are on Sabot rear and provided on the rear end face of the projectile body. This is not possible with the genre of the present application.
  • the object of the present invention is to improve the seal in such a way that an absolutely reliable gas seal between the gun barrel and the sabot is achieved during firing, unaffected by the wear of a gun barrel during its service life.
  • the droppable sabot contains the features in the characterizing part of claim 1.
  • the sabot jacket is held together with the sabot body by the inner wall of the cannon tube in such a way that a reliable seal between the lower-caliber bullet body or an arrow projectile body and the sabot is ensured.
  • old cannon tubes where the inside diameter of the tube has increased due to wear, there is a risk that the segments of the sabot body will move radially outwards when the shot is fired and the segments of the sabot body will no longer rest on the arrow projectile body, so that between the sabot and the lower-caliber bullet body Gas can escape.
  • the sabot In another known wing-stabilized arrow projectile of this type (see DE-A-35 25 854), the sabot consists of a jacket at the front, a sabot body in the middle and a sealing washer at the rear. Since the sealing washer and jacket are not gas-tight and there is no end seal, a perfect gas seal cannot be guaranteed when fired.
  • a sabot 10 is attached to a lower-caliber floor, in particular an arrow floor 11.
  • the arrow projectile 11 has a tip 12 at the front and a thread 13 at the back for fastening a stabilizing wing, which is known and not shown.
  • a second external thread 14 is provided on the central part 15 of the arrow projectile 11 for fastening the sabot 10 to the arrow projectile 11. Since the arrow projectile 11 is not the subject of the present invention, it is not described in more detail here.
  • the sabot 10 is composed of a sabot body 16 and a sabot jacket 17. At the front end of the sabot 10, the arrowhead 12 is covered by a hood 18.
  • the sabot jacket 17 has at its front end a circumferential groove 19 (see also FIG. 2) into which a bead 20 projects, as a result of which the hood 18 is fastened to the sabot jacket 17.
  • the sabot body 16 has an internal thread 21 and can be screwed onto the external thread 14 of the arrow projectile 11. Furthermore, the sabot body 16 has three longitudinal slots or longitudinal grooves 22 which are evenly distributed on the circumference, of which only a single longitudinal groove 22 is visible in FIGS. 1, 2, 4 and 5.
  • a longitudinal slot 22 in the sabot body 16 is shown on the right side by a dashed line, the material of the sabot jacket 17 here Longitudinal slot 22 fills.
  • the sabot body 16 is divided into three segments 23, 24, 25. 4 shows two segments 23 and 24 and a further segment 25 in FIG. These three segments 23, 24 and 25 are connected to one another according to FIGS.
  • predetermined breaking points 26 are arranged at the rear end in the area of the inside diameter of the sabot body 16 in order to prevent premature undesired rupture when fired by the pressure of the propellant gases.
  • the three longitudinal slots 22 are arranged radially and, according to the invention, have a T-shaped cross section with two shoulders 27 at least in the area of a cartridge case attachment point 49, see FIGS. 1, 4 and 5, the meaning of which will be explained below.
  • the sabot body 16 has a number of circumferential grooves.
  • the first circumferential groove 28 serves to fasten a cartridge case to the sabot projectile or to anchor the sabot projectile in a cartridge case, not shown here.
  • the remaining four circumferential grooves 29, 30, 31 and 32 serve to fasten the sabot jacket 17 to the sabot body 16. The meaning of these grooves 29-32 is not explained in more detail here.
  • the sabot body 16 is preferably made of light metal.
  • the sabot jacket 17 which is considered essential for the present invention, almost completely surrounds the sabot body 16. According to FIGS. 1 and 2, only the areas of the cartridge case fastening point 49 with the circumferential groove 28, which are not interrupted by the three longitudinal grooves 22, which serve to fasten the projectile in the cartridge case, not shown, and three adjoining segments of a support ring 50 protrude from the Sabot jacket 17 out.
  • the sabot jacket 17 has a front section 33, which is referred to as the front bullet centering, and a rear section 34, which is referred to as the rear bullet centering and at the same time serves for swirl transmission and therefore has a somewhat larger diameter than the front section 33. According to FIG.
  • the sabot jacket 17 has three longitudinal slots 48, through which the sabot jacket 17 is also divided into three segments 35, 36 and 37. These three segments 35, 36 and 37 are connected to one another according to FIGS. 1 and 3 by predetermined breaking points 38. The length of these predetermined breaking points is shown in Fig.1.
  • the sabot jacket 17 has six recesses 39, ie each of the three segments 35, 36 and 37 has two recesses 39 (see FIG. 3).
  • the rear end face 40 of the sabot body 16 is covered by a sealing cap 41 of the sabot jacket 17 except for the three segments of the support ring 50.
  • This end face or end face 40 is partially conical with a jacket surface that extends toward the front, the generatrix of the cone jacket preferably being formed by a circular arc with a center in the area of the outside diameter of the sabot 10, in other words, the rear end face 40 forms a spherical zone that is turned outwards Support for the correspondingly designed sealing cap 41.
  • the pressure of the propellant gases thus acts to support the seal when fired.
  • the sealing cap 41 has an upturned spherical zone-shaped end seal 42, on which three predetermined breaking points 43 (see FIG. 2) distributed evenly around the circumference are arranged. Furthermore, an annular rib 44 protrudes into a corresponding axial safety groove 45 at the rear end of the sabot body 16. Furthermore, the end seal 42 lies partly on the thread 14 of the Arrow projectile 11, protrudes beyond this thread and, as a cylindrical section 47, lies partially against the cylindrical surface 46.
  • the sealing cap 41 and the end seal 42 are pressed radially and axially against the arrow projectile body by the gas pressure.
  • the sabot body 16 has a support ring 50 for the external support of the sealing cap 41.
  • the shoulders 27 already mentioned in the longitudinal slots 22 between the segments 23, 24 and 25 of the sabot body 16 in particular have the task of ensuring, as additional sealing surfaces, the seal in the area of the cartridge case attachment point 49 against the gas pressure when the projectile is fired, because due to the gas pressure, the material of the sabot jacket 17 present in the longitudinal slots 22 is pressed against these shoulders 27, since the gas pressure, as indicated by arrows B, acts radially inwards. This also ensures the seal between the sabot projectile and the powder chamber during storage and transport, in particular in cooperation with a sealing liquid used in the cartridge assembly.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Testing Of Engines (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Actuator (AREA)
  • Gasket Seals (AREA)

Abstract

In the case of such a sub-caliber projectile, a so-called discarding sabot (10) is located between the barrel inner wall of the gun and the arrow-shaped projectile body (11) during firing. This discarding sabot (10), which is used in a known manner in order to enlarge the acceleration area, is composed of a discarding sabot body (16) and a discarding sabot casing (17). In order that the discarding sabot (10) can easily be released from the arrow-shaped projectile body (11) after the projectile (10, 11) emerges from the weapon barrel, the discarding sabot body (16) is segmented. The touching surfaces between the segments (23, 24, 25) on the one hand and between the arrow-shaped projectile body (11) and the segments (23, 24, 25) on the other hand lead to sealing problems. In order to overcome these sealing problems, special segmentation of the discarding sabot body (16) is provided, according to the invention, with longitudinal slots (22), which have a T-shaped cross-section at least in parts, and weak points (26) in the region of its internal diameter as well as a gas-tight seal with a sealing cap (41), which is partially in the form of a truncated cone and expands forwards, are provided with a terminating seal (42). <IMAGE>

Description

Die Erfindung betrifft einen abwerfbaren Treibspiegel an einem flügelstabilisierten Unterkalibergeschoss, das aus einem mit Drallnuten versehenen Waffenrohr abschiessbar ist, gemäss dem Oberbegriff des Anspruches 1.The invention relates to a detachable sabot on a wing-stabilized lower-caliber projectile, which can be fired from a weapon barrel provided with swirl grooves, according to the preamble of claim 1.

Bei einem bekannten flügelstabilisierten Unterkalibergeschoss dieser Art (siehe EP-A-0 300 373 bzw. US-A-4,815,682) sind die drei Segmente des Treibspiegelkörpers oder Treibspiegelhecks durch den Treibspiegelmantel (dort als Treibspiegelkörper bezeichnet) zusammengehalten. Zur Abdichtung der Berührungsflächen zwischen den drei Segmenten weisen diese Berührungsflächen Kanäle auf, in welche Abdichtungsstreifen eingesetzt sind. Zur Abdichtung der Berührungsflächen zwischen dem Unterkalibergeschoss oder Pfeilgeschoss und den drei Segmenten des Treibspiegelhecks oder Treibspiegelkörpers ist im Bereich der hinteren Stirnfläche des Treibspiegelhecks eine ringförmige Dichtung vorhanden. Diese hintere Stirnfläche bildet die Beschleunigungspartie. Es hat sich nun gezeigt, dass die bekannte Abdichtung ungenügend ist und verbessert werden muss.In a known wing-stabilized sub-caliber projectile of this type (see EP-A-0 300 373 or US-A-4,815,682), the three segments of the sabot body or sabot rear end are held together by the sabot jacket (referred to as sabot body there). To seal the contact surfaces between the three segments, these contact surfaces have channels in which sealing strips are inserted. To seal the contact surfaces between the lower-caliber floor or arrow floor and the three segments of the sabot rear or sabot body, an annular seal is provided in the area of the rear end face of the sabot rear. This rear end face forms the acceleration section. It has now been shown that the known seal is insufficient and must be improved.

Ferner ist in der CH-675 769 A5 ein Treibspiegelgeschoss mit einer Sollbruchstelle am Heckteil des Treibspiegels beschrieben, wobei der Heckteil zur Segmentierung Längsschlitze und im Bereich des Aussendurchmessers einen Sollbruchstellen enthaltenden Ring aufweist. Zur Abdichtung der Treibgase ist am hinteren Ende des Treibspiegelhecks eine halbkugelförmige Abdichtungsschale des Treibspiegelmantels vorgesehen. Damit das Treibspiegelheckteil beim Abschuss des Geschosses nicht vorzeitig in seine Sektoren zerfällt, d.h. um den auf die Abdichtungsschale radial nach aussen wirkenden Gasdruck zu neutralisieren, sind zusammenwirkende Stützflächen am Treibspiegelheck und an der hinteren Stirnfläche des Geschosskörpers vorgesehen. Dies ist bei der Gattung der vorliegenden Anmeldung nicht möglich.Furthermore, CH-675 769 A5 describes a sabot projectile with a predetermined breaking point on the rear part of the sabot, the rear part having longitudinal slots for segmentation and a ring containing predetermined breaking points in the area of the outside diameter. To seal the propellant gases, a hemispherical sealing shell of the sabot jacket is provided at the rear end of the sabot tail. So that the sabot rear part does not disintegrate into its sectors prematurely when the projectile is fired, ie in order to neutralize the gas pressure acting radially outward on the sealing shell, cooperating supporting surfaces are on Sabot rear and provided on the rear end face of the projectile body. This is not possible with the genre of the present application.

Die Aufgabe der vorliegenden Erfindung besteht nun darin, die Dichtung so zu verbessern, dass beim Abschuss eine absolut zuverlässige Gasdichtung zwischen Kanonenrohr und Treibspiegel, unbeeinflusst von der Abnutzung eines Kanonenrohres während seiner Lebensdauer, erreicht wird.The object of the present invention is to improve the seal in such a way that an absolutely reliable gas seal between the gun barrel and the sabot is achieved during firing, unaffected by the wear of a gun barrel during its service life.

Die Aufgabe wird erfindungsgemäss dadurch gelöst, dass der abwerfbare Treibspiegel die Merkmale im Kennzeichen des Anspruches 1 enthält.The object is achieved according to the invention in that the droppable sabot contains the features in the characterizing part of claim 1.

Bei neuen Kanonenrohren wird der Treibspiegelmantel mit dem Treibspiegelkörper durch die Innenwand des Kanonenrohres zusammengehalten, derart, dass eine zuverlässige Dichtung zwischen Unterkalibergeschosskörper bzw. einem Pfeilgeschosskörper und Treibspiegel gewährleistet ist. Bei alten Kanonenrohren, bei denen sich der Innendurchmesser des Rohres durch die Abnützung vergrössert hat, besteht jedoch die Gefahr, dass beim Abschuss die Segmente des Treibspiegelkörpers sich radial nach aussen bewegen und die Segmente des Treibspiegelkörpers nicht mehr am Pfeilgeschosskörper anliegen, sodass zwischen Treibspiegel und Unterkalibergeschosskörper Gas austreten kann. Dies wird nun durch die sich nach vorne ausweitende Mantelfläche der Treibspiegelmantel-Abdeckung an der hinteren Stirnfläche des Treibspiegels, vorzugsweise durch die nach aussen gestülpte kugelzonenförmige Mantelfläche der Dichtkappe, sowie durch die T-förmigen Längsschlitze im Bereich der Patronenhülsenbefestigungsstelle verhindert. Durch die spezielle Form des Kegelmantels sowie den T-förmigen Längsschlitzen hat der Gasdruck das Bestreben, die einzelnen Segmente des Treibspiegelkörpers gegen den Körper des Pfeilgeschosses anzudrücken, derart, dass eine zuverlässige Gasdichtung zwischen Unterkalibergeschoss bzw. Pfeilgeschoss und Treibspiegel gewährleistet ist.In the case of new cannon tubes, the sabot jacket is held together with the sabot body by the inner wall of the cannon tube in such a way that a reliable seal between the lower-caliber bullet body or an arrow projectile body and the sabot is ensured. With old cannon tubes, where the inside diameter of the tube has increased due to wear, there is a risk that the segments of the sabot body will move radially outwards when the shot is fired and the segments of the sabot body will no longer rest on the arrow projectile body, so that between the sabot and the lower-caliber bullet body Gas can escape. This is now prevented by the forwardly extending jacket surface of the sabot jacket cover on the rear end face of the sabot, preferably by the outwardly spherical zone-shaped jacket surface of the sealing cap, and by the T-shaped longitudinal slots in the area of the cartridge case attachment point. Due to the special shape of the cone shell and the T-shaped longitudinal slots, the gas pressure tends to separate the individual segments of the sabot body against the body of the Press the arrow floor in such a way that a reliable gas seal between the lower-caliber floor or arrow floor and the sabot is guaranteed.

Durch die Ausbildung des Treibspiegels gemäss Anspruch 1, vorteilhafterweise mit kugelzonenförmiger Dichtkappe gemäss Anspruch 2, werden folgende Vorteile erreicht:

  • a) Keine Gasleckage beim Abschuss, d.h. bessere Gasdichtung des Treibspiegels während der Geschossbewegung im Kanonenrohr;
  • b) der Gasdruck kann den Treibspiegel gegen den Pfeilgeschosskörper pressen, d.h. auch bei alten Kanonenrohren ist ein einwandfreier Abschuss gewährleistet;
  • c) da, wie erwähnt, der Treibspiegel besser am Pfeilgeschosskörper anliegt, wird die Gefahr von Brüchen des Pfeilgeschosskörpers vermindert;
  • d) dank der verbesserten Gasdichtung, insbesondere durch die T-förmigen Längsschlitze, ist auch die Lager- und Transport-Dichtigkeit gegenüber dem Pulverraum wesentlich verbessert worden;
  • e) trotz der verbesserten Gasdichtung sind die Sollbruchstellen zwischen den einzelnen Segmenten des Treibspiegels klein, derart, dass sich beim Austritt des Geschosses der Treibspiegel leicht radial in Segmente zerlegen lässt ohne die Flugbahn des Pfeilgeschosses zu beeinträchtigen, somit ergibt sich eine gute Treffgenauigkeit;
  • f) auch die Herstellung des Treibspiegels ist einfach und kostengünstig.
The following advantages are achieved by designing the sabot according to claim 1, advantageously with a spherical zone sealing cap according to claim 2:
  • a) No gas leakage when firing, ie better gas sealing of the sabot during the projectile movement in the gun barrel;
  • b) the gas pressure can press the sabot against the arrow projectile body, ie a perfect shot is guaranteed even with old cannon tubes;
  • c) since, as mentioned, the sabot lies better on the arrow projectile body, the risk of breakages of the arrow projectile body is reduced;
  • d) thanks to the improved gas seal, in particular through the T-shaped longitudinal slots, the storage and transport tightness compared to the powder chamber has been significantly improved;
  • e) despite the improved gas seal, the predetermined breaking points between the individual segments of the sabot are small, such that when the projectile emerges the sabot can easily be broken down radially into segments without impairing the trajectory of the arrow projectile, so that there is good accuracy;
  • f) the production of the sabot is simple and inexpensive.

Der einteilig ausgebildete Treibspiegelmantel besteht aus den folgenden zusammenhängenden Teilen:

  • a) Geschosszentrierung vorne und Drallübertragung mit Geschosszentrierung hinten mit Verankerung am Treibspiegelkörper;
  • b) Dichtung der Längsschlitze des Treibspiegelkörpers, insbesondere im Bereich der Patronenhülsenbefestigungsstelle;
  • c) Dichtkappe auf der hinteren Stirnfläche des Treibspiegelkörpers, welche als Beschleunigungspartie bezeichnet wird, und integrierte Abschlussdichtung.
The one-piece sabot jacket consists of the following connected parts:
  • a) projectile centering at the front and swirl transmission with projectile centering at the rear with anchoring to the sabot body;
  • b) sealing the longitudinal slots of the sabot body, in particular in the area of the cartridge case attachment point;
  • c) Sealing cap on the rear end face of the sabot body, which is referred to as the acceleration section, and integrated end seal.

Bei einem anderen bekannten flügelstabilisierten Pfeilgeschoss dieser Art (siehe DE-A-35 25 854) besteht der Treibspiegel aus einem Mantel vorne, einem Treibspiegelkörper in der Mitte und einer Dichtscheibe hinten. Da Dichtscheibe und Mantel nicht gasdicht miteinander verbunden sind und eine Abschlussdichtung fehlt, ist eine einwandfreie Gasdichtung beim Abschuss nicht gewährleistet.In another known wing-stabilized arrow projectile of this type (see DE-A-35 25 854), the sabot consists of a jacket at the front, a sabot body in the middle and a sealing washer at the rear. Since the sealing washer and jacket are not gas-tight and there is no end seal, a perfect gas seal cannot be guaranteed when fired.

Ein Ausführungsbeispiel des erfindungsgemässen Treibspiegels für ein flügelstabilisiertes Unterkalibergeschoss ist im folgenden anhand der beigefügten Zeichnung ausführlich beschrieben. Es zeigt:

Fig.1
einen Längsschnitt entlang der Linie I - I in Fig.3 durch einen abwerfbaren Treibspiegel mit einem flügelstabilisierten Pfeilgeschoss;
Fig.2
eine Ansicht des in Fig.1 dargestellten Treibspiegels mit einem Teil des Pfeilgeschosses, jedoch gegenüber Fig.1 um 90° verdreht;
Fig.3
einen Querschnitt durch den Treibspiegel entlang der Linie III - III in Fig.1;
Fig.4
einen Teilquerschnitt in vergrössertem Massstab durch den Treibspiegel entlang der Linie IV - IV in Fig.1, jedoch wie Fig.2 um 90° verdreht;
Fig.5
ein Detail aus Fig.1 in vergrössertem Massstab an der durch einen Pfeil A bezeichneten Stelle.
An embodiment of the sabot according to the invention for a wing-stabilized lower-caliber floor is described in detail below with reference to the accompanying drawing. It shows:
Fig. 1
a longitudinal section along the line I - I in Figure 3 by a droppable sabot with a wing-stabilized arrow projectile;
Fig. 2
a view of the sabot shown in Figure 1 with part of the arrow projectile, but rotated by 90 ° compared to Figure 1;
Fig. 3
a cross section through the sabot along the line III - III in Figure 1;
Fig. 4
a partial cross section on an enlarged scale through the sabot along the line IV - IV in Figure 1, but rotated by 90 ° like Figure 2;
Fig. 5
a detail of Figure 1 on an enlarged scale at the point indicated by an arrow A.

Gemäss Fig.1 ist ein Treibspiegel 10 an einem Unterkalibergeschoss, insbesondere einem Pfeilgeschoss 11 befestigt. Das Pfeilgeschoss 11 weist vorne eine Spitze 12 und hinten ein Gewinde 13 zur Befestigung eines an sich bekannten, nicht dargestellten Stabilisierungsflügels auf. Zur Befestigung des Treibspiegels 10 am Pfeilgeschoss 11 ist ein zweites Aussengewinde 14 am Mittelteil 15 des Pfeilgeschosses 11 vorhanden. Da das Pfeilgeschoss 11 nicht Gegenstand der vorliegenden Erfindung ist, wird es hier nicht näher beschrieben.According to FIG. 1, a sabot 10 is attached to a lower-caliber floor, in particular an arrow floor 11. The arrow projectile 11 has a tip 12 at the front and a thread 13 at the back for fastening a stabilizing wing, which is known and not shown. A second external thread 14 is provided on the central part 15 of the arrow projectile 11 for fastening the sabot 10 to the arrow projectile 11. Since the arrow projectile 11 is not the subject of the present invention, it is not described in more detail here.

Der Treibspiegel 10 setzt sich aus einem Treibspiegelkörper 16 und einem Treibspiegelmantel 17 zusammen. Am vorderen Ende des Treibspiegels 10 ist die Pfeilspitze 12 durch eine Haube 18 abgedeckt. Der Treibspiegelmantel 17 weist an seinem vorderen Ende eine Umfangsrille 19 auf (siehe auch Fig.2), in welche ein Wulst 20 hineinragt, wodurch die Haube 18 am Treibspiegelmantel 17 befestigt ist.The sabot 10 is composed of a sabot body 16 and a sabot jacket 17. At the front end of the sabot 10, the arrowhead 12 is covered by a hood 18. The sabot jacket 17 has at its front end a circumferential groove 19 (see also FIG. 2) into which a bead 20 projects, as a result of which the hood 18 is fastened to the sabot jacket 17.

Der Treibspiegelkörper 16 weist ein Innengewinde 21 auf und lässt sich auf das Aussengewinde 14 des Pfeilgeschosses 11 aufschrauben. Ferner weist der Treibspiegelkörper 16 drei gleichmässig am Umfang verteilte Längsschlitze oder Längsnuten 22 auf, von denen in den Figuren 1, 2, 4 und 5 jeweils nur eine einzige Längsnut 22 sichtbar ist. In Fig.1 ist ein Längsschlitz 22 im Treibspiegelkörper 16 auf der rechten Seite durch eine gestrichelte Linie angezeigt, wobei hier das Material des Treibspiegelmantels 17 den Längsschlitz 22 ausfüllt. Durch diese Längsnuten 22 wird der Treibspiegelkörper 16 in drei Segmente 23, 24, 25 unterteilt. In Fig.4 sind zwei Segmente 23 und 24 und in Fig.1 ein weiteres Segment 25 gezeigt. Diese drei Segmente 23, 24 und 25 sind gemäss Fig.1 und 5 durch Sollbruchstellen 26 miteinander verbunden. Diese Sollbruchstellen 26 sind erfindungsgemäss (siehe Fig.1) am hinteren Ende im Bereich des Innendurchmessers des Treibspiegelkörpers 16 angeordnet, um ein vorzeitiges unerwünschtes Aufbrechen beim Abschuss durch den Druck der Treibgase zu verhindern. Die drei Längsschlitze 22 sind radial angeordnet und weisen erfindungsgemäss mindestens im Bereich einer Patronenhülsenbefestigungsstelle 49 einen T-förmigen Querschnitt mit zwei Schultern 27 auf, siehe Fig.1, 4 und 5, deren Bedeutung noch erläutert wird. Ferner weist der Treibspiegelkörper 16 eine Anzahl Umfangsnuten auf. Vom unteren oder hinteren Ende des Treibspiegelkörpers 16 aus betrachtet, dient die erste Umfangsnut 28 zur Befestigung einer Patronenhülse am Treibspiegelgeschoss, oder zur Verankerung des Treibspiegelgeschosses in einer hier nicht dargestellten Patronenhülse. Die übrigen vier Umfangsnuten 29, 30, 31 und 32 dienen zur Befestigung des Treibspiegelmantels 17 am Treibspiegelkörper 16. Die Bedeutung dieser Nuten 29 - 32 ist hier nicht näher erläutert. Der Treibspiegelkörper 16 wird vorzugsweise aus Leichtmetall hergestellt.The sabot body 16 has an internal thread 21 and can be screwed onto the external thread 14 of the arrow projectile 11. Furthermore, the sabot body 16 has three longitudinal slots or longitudinal grooves 22 which are evenly distributed on the circumference, of which only a single longitudinal groove 22 is visible in FIGS. 1, 2, 4 and 5. In Figure 1, a longitudinal slot 22 in the sabot body 16 is shown on the right side by a dashed line, the material of the sabot jacket 17 here Longitudinal slot 22 fills. By means of these longitudinal grooves 22, the sabot body 16 is divided into three segments 23, 24, 25. 4 shows two segments 23 and 24 and a further segment 25 in FIG. These three segments 23, 24 and 25 are connected to one another according to FIGS. 1 and 5 by predetermined breaking points 26. According to the invention (see FIG. 1), these predetermined breaking points 26 are arranged at the rear end in the area of the inside diameter of the sabot body 16 in order to prevent premature undesired rupture when fired by the pressure of the propellant gases. The three longitudinal slots 22 are arranged radially and, according to the invention, have a T-shaped cross section with two shoulders 27 at least in the area of a cartridge case attachment point 49, see FIGS. 1, 4 and 5, the meaning of which will be explained below. Furthermore, the sabot body 16 has a number of circumferential grooves. When viewed from the lower or rear end of the sabot body 16, the first circumferential groove 28 serves to fasten a cartridge case to the sabot projectile or to anchor the sabot projectile in a cartridge case, not shown here. The remaining four circumferential grooves 29, 30, 31 and 32 serve to fasten the sabot jacket 17 to the sabot body 16. The meaning of these grooves 29-32 is not explained in more detail here. The sabot body 16 is preferably made of light metal.

Der Treibspiegelmantel 17, der für die vorliegende Erfindung als wesentlich angesehen wird, umgibt den Treibspiegelkörper 16 fast vollständig. Gemäss Fig.1 und 2 ragen nur die nicht durch die drei Längsnuten 22 unterbrochenen Bereiche der Patronenhülsenbefestigungsstelle 49 mit der Umfangsnut 28, welche zur Befestigung des Geschosses in der nicht dargestellten Patronenhülse dienen, sowie drei daran anschliessende Segmente eines Stützringes 50 aus dem Treibspiegelmantel 17 heraus. Der Treibspiegelmantel 17 weist einen vorderen Abschnitt 33 auf, der als vordere Geschosszentrierung bezeichnet wird, sowie einen hinteren Abschnitt 34, der als hintere Geschosszentrierung bezeichnet wird und zugleich zur Drallübertragung dient und deshalb einen etwas grösseren Durchmesser als der vordere Abschnitt 33 besitzt. Gemäss Fig.3 weist der Treibspiegelmantel 17 drei Längsschlitze 48 auf, durch welche der Treibspiegelmantel 17 ebenfalls in drei Segmente 35, 36 und 37 unterteilt wird. Diese drei Segmente 35, 36 und 37 sind gemäss Fig.1 und 3 durch Sollbruchstellen 38 miteinander verbunden. Die Länge dieser Sollbruchstellen ist aus Fig.1 ersichtlich. Ausserdem weist der Treibspiegelmantel 17 sechs Aussparungen 39 auf, d.h. jedes der drei Segmente 35, 36 und 37 weist zwei Aussparungen 39 auf (siehe Fig.3). Die hintere Stirnseite 40 des Treibspiegelkörpers 16 ist durch eine Dichtkappe 41 des Treibspiegelmantels 17 bis auf die drei Segmente des Stützringes 50 abgedeckt. Diese Stirnseite bzw. Stirnfläche 40 ist teilweise kegelförmig mit nach vorne ausweitender Mantelfläche ausgebildet, wobei die Erzeugende des Kegelmantels vorzugsweise durch einen Kreisbogen mit Zentrum im Bereich des Aussendurchmessers des Treibspiegels 10 gebildet wird, mit anderen Worten bildet die hintere Stirnfläche 40 eine nach aussen gestülpte kugelzonenförmige Auflage für die entsprechend zusammenwirkend ausgebildete Dichtkappe 41. Damit wirkt der Druck der Treibgase beim Abschuss abdichtungsunterstützend.The sabot jacket 17, which is considered essential for the present invention, almost completely surrounds the sabot body 16. According to FIGS. 1 and 2, only the areas of the cartridge case fastening point 49 with the circumferential groove 28, which are not interrupted by the three longitudinal grooves 22, which serve to fasten the projectile in the cartridge case, not shown, and three adjoining segments of a support ring 50 protrude from the Sabot jacket 17 out. The sabot jacket 17 has a front section 33, which is referred to as the front bullet centering, and a rear section 34, which is referred to as the rear bullet centering and at the same time serves for swirl transmission and therefore has a somewhat larger diameter than the front section 33. According to FIG. 3, the sabot jacket 17 has three longitudinal slots 48, through which the sabot jacket 17 is also divided into three segments 35, 36 and 37. These three segments 35, 36 and 37 are connected to one another according to FIGS. 1 and 3 by predetermined breaking points 38. The length of these predetermined breaking points is shown in Fig.1. In addition, the sabot jacket 17 has six recesses 39, ie each of the three segments 35, 36 and 37 has two recesses 39 (see FIG. 3). The rear end face 40 of the sabot body 16 is covered by a sealing cap 41 of the sabot jacket 17 except for the three segments of the support ring 50. This end face or end face 40 is partially conical with a jacket surface that extends toward the front, the generatrix of the cone jacket preferably being formed by a circular arc with a center in the area of the outside diameter of the sabot 10, in other words, the rear end face 40 forms a spherical zone that is turned outwards Support for the correspondingly designed sealing cap 41. The pressure of the propellant gases thus acts to support the seal when fired.

Gemäss Fig.5 weist die Dichtkappe 41 eine umgestülpte kugelzonenförmige Abschlussdichtung 42 auf, an der drei gleichmässig am Umfang verteilte Sollbruchstellen 43 (siehe Fig.2) angeordnet sind. Weiter ragt eine ringförmige Rippe 44 in eine entsprechende axiale Sicherheitsnut 45 am hinteren Ende des Treibspiegelkörpers 16. Ferner liegt die Abschlussdichtung 42 teilweise am Gewinde 14 des Pfeilgeschosses 11 an, ragt über dieses Gewinde hinaus und liegt als zylindrischer Abschnitt 47 teilweise an der zylindrischen Oberfläche 46 an. Beim Abschuss wird die Dichtkappe 41 und die Abschlussdichtung 42 durch den Gasdruck radial und axial gegen den Pfeilgeschosskörper angepresst. Zur Verhinderung einer Verschiebung der Dichtkappe 41, gestrichelt dargestellt, nach aussen durch den Gasdruck, weist der Treibspiegelkörper 16 einen Stützring 50 zur äusseren Abstützung der Dichtkappe 41 auf.According to FIG. 5, the sealing cap 41 has an upturned spherical zone-shaped end seal 42, on which three predetermined breaking points 43 (see FIG. 2) distributed evenly around the circumference are arranged. Furthermore, an annular rib 44 protrudes into a corresponding axial safety groove 45 at the rear end of the sabot body 16. Furthermore, the end seal 42 lies partly on the thread 14 of the Arrow projectile 11, protrudes beyond this thread and, as a cylindrical section 47, lies partially against the cylindrical surface 46. When firing, the sealing cap 41 and the end seal 42 are pressed radially and axially against the arrow projectile body by the gas pressure. To prevent displacement of the sealing cap 41, shown in broken lines, outwards by the gas pressure, the sabot body 16 has a support ring 50 for the external support of the sealing cap 41.

Gemäss Fig.4 haben die bereits erwähnten Schultern 27 in den Längsschlitzen 22 zwischen den Segmenten 23, 24 und 25 des Treibspiegelkörpers 16 insbesondere die Aufgabe, als zusätzliche Dichtflächen die Dichtung im Bereich der Patronenhülsenbefestigungsstelle 49 gegenüber dem Gasdruck beim Abschuss des Geschosses zu gewährleisten, denn durch den Gasdruck wird das in den Längsschlitzen 22 vorhandene Material des Treibspiegelmantels 17 gegen diese Schultern 27 gepresst, da der Gasdruck, wie durch Pfeile B angedeutet, radial nach innen wirkt. Ferner wird dadurch auch die Abdichtung zwischen dem Treibspiegelgeschoss und dem Pulverraum bei der Lagerung und dem Transport gewährleistet, insbesondere im Zusammenwirken mit einer bei der Patronierungsmontage verwendeten Dichtflüssigkeit.According to FIG. 4, the shoulders 27 already mentioned in the longitudinal slots 22 between the segments 23, 24 and 25 of the sabot body 16 in particular have the task of ensuring, as additional sealing surfaces, the seal in the area of the cartridge case attachment point 49 against the gas pressure when the projectile is fired, because due to the gas pressure, the material of the sabot jacket 17 present in the longitudinal slots 22 is pressed against these shoulders 27, since the gas pressure, as indicated by arrows B, acts radially inwards. This also ensures the seal between the sabot projectile and the powder chamber during storage and transport, in particular in cooperation with a sealing liquid used in the cartridge assembly.

Claims (5)

Abwerfbarer Treibspiegel (10) an einem flügelstabilisierten Unterkalibergeschoss (11), das aus einem mit Drallnuten versehenen Waffenrohr abschiessbar ist, enthaltend: - einen Treibspiegelkörper (16), in dem das Unterkalibergeschoss (11) verankert ist, der in Segmente (23, 24, 25) unterteilbar ist und eine Patronenhülsenbefestigungsstelle (49) und eine Beschleunigungspartie am hinteren Ende aufweist, und - einen Treibspiegelmantel (17), der in Segmente (35, 36, 37) unterteilbar ist sowie mindestens teilweise das Unterkalibergeschoss (11) und den Treibspiegelkörper (16) umfasst und durchdringt, dadurch gekennzeichnet, dass zur Segmentierung und gasdichten Abdichtung - der Treibspiegelkörper 16) Längsschlitze (22) und Sollbruchstellen (26) aufweist, derart, dass die Sollbruchstellen (26) im Bereich des Innendurchmessers bei der Beschleunigungspartie des Treibspiegelkörpers (16) angeordnet sind, die Längsschlitze (22) im Bereich der Patronenhülsenbefestigungsstelle (49) einen T-förmigen Querschnitt mit zwei Schultern (27) als zusätzliche Dichtflächen für das im Längsschlitz (22) befindliche Material des Treibspiegelmantels (17) aufweisen sowie die Beschleunigungspartie des Treibspiegelkörpers (16) teilweise kegelstumpfförmig mit nach vorne ausweitender Mantelfläche ausgebildet ist, und - der Treibspiegelmantel (17) eine mit der Beschleunigungspartie des Treibspiegelkörpers (16) zusammenwirkend ausgebildete Dichtkappe (41) und Abschlussdichtung (42) aufweist. Ejectable sabot (10) on a wing-stabilized lower-caliber floor (11), which can be fired from a gun barrel provided with swirl grooves, containing: - A sabot body (16) in which the lower-caliber projectile (11) is anchored, which can be divided into segments (23, 24, 25) and a cartridge case attachment point (49) and an acceleration section at the rear end, and a sabot jacket (17) which can be subdivided into segments (35, 36, 37) and at least partially encompasses and penetrates the lower-caliber floor (11) and the sabot body (16), characterized in that for segmentation and gas-tight sealing - The sabot body 16) has longitudinal slots (22) and predetermined breaking points (26), such that the predetermined breaking points (26) are arranged in the area of the inner diameter in the acceleration section of the sabot body (16), the longitudinal slots (22) in the area of the cartridge case attachment point (49 ) have a T-shaped cross-section with two shoulders (27) as additional sealing surfaces for the material of the sabot jacket (17) located in the longitudinal slot (22) and the acceleration section of the sabot body (16) is partially frustoconical in shape with the jacket surface expanding towards the front, and - The sabot jacket (17) has a sealing cap (41) and end seal (42) which cooperates with the acceleration section of the sabot body (16). Treibspiegel nach Anspruch 1, dadurch gekennzeichnet, dass die Beschleunigungspartie eine nach aussen gestülpte kugelzonenförmige Stirnfläche (40) und Dichtkappe (41) aufweist, wobei am Treibspiegelkörper (16) ein Stützring (50) zur äusseren Abstützung der Dichtkappe (41) vorhanden ist.The sabot according to claim 1, characterized in that the acceleration section has a spherical zone-shaped end face (40) and sealing cap (41), a support ring (50) being provided on the sabot body (16) for external support of the sealing cap (41). Treibspiegel nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Abschlussdichtung (42) eine ringförmige Rippe (44) aufweist, welche in eine axial gerichtete Sicherheitsnut (45) des Treibspiegelkörpers (16) hineinragt.The sabot according to claim 1 or 2, characterized in that the end seal (42) has an annular rib (44) which projects into an axially directed safety groove (45) of the sabot body (16). Treibspiegel nach Anspruch 3, dadurch gekennzeichnet, dass die Abschlussdichtung (42) teilweise an einem Gewinde (14) des Unterkalibergeschosses (11) und teilweise an einer glatten Zylinderoberfläche (46) des Unterkalibergeschosses (11) anschliessend an das Gewinde (14) anliegt.The sabot according to claim 3, characterized in that the end seal (42) lies partially against a thread (14) of the lower-caliber floor (11) and partly against a smooth cylinder surface (46) of the lower-caliber floor (11) against the thread (14). Treibspiegel nach Anspruch 4, dadurch gekennzeichnet, dass der dem Gewinde (14) anliegende Teil der Abschlussdichtung (42) als ein nach hinten hervorstehender zylindrischer Abschnitt (47) ausgebildet ist.The sabot according to claim 4, characterized in that the part of the end seal (42) which bears against the thread (14) is designed as a cylindrical section (47) projecting towards the rear.
EP94104252A 1993-05-13 1994-03-18 Sabot for a finstabilized projectile Expired - Lifetime EP0624774B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1453/93 1993-05-13
CH145393 1993-05-13

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EP (1) EP0624774B1 (en)
JP (1) JP3429058B2 (en)
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DE (1) DE59406170D1 (en)
ES (1) ES2118279T3 (en)
NO (1) NO302440B1 (en)

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US5763809A (en) * 1995-07-19 1998-06-09 Oerlikon Contraves Pyrotec Ag Device for fastening a cartridge case to a projectile
EP0855573A1 (en) * 1997-01-27 1998-07-29 Oerlikon-Contraves Pyrotec AG Sabot for projectile
EP0989381A2 (en) 1999-02-25 2000-03-29 Oerlikon Contraves Pyrotec AG Subcalibre projectile
EP0999426A1 (en) 1998-11-06 2000-05-10 Oerlikon Contraves Pyrotec AG Sabot for sub-caliber projectile
WO2007057115A1 (en) * 2005-11-18 2007-05-24 Rheinmetall Waffe Munition Gmbh Method for producing a segmented sabot

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DE19650739C2 (en) * 1996-12-06 1999-12-16 Rheinmetall W & M Gmbh Sub-caliber floor
US6564720B1 (en) * 2000-01-14 2003-05-20 Olin Corporation Sabot for a bullet
DE102010045474A1 (en) * 2010-09-16 2012-03-22 Rheinmetall Waffe Munition Gmbh Projectile with disposable sabot
US9188417B2 (en) 2013-08-01 2015-11-17 Raytheon Company Separable sabot for launching payload
US10578382B1 (en) 2018-10-19 2020-03-03 Vitaliy Melnikov Auxiliary caliber weapon system
US11852447B2 (en) 2019-04-26 2023-12-26 The University Of Kansas Maneuvering aeromechanically stable sabot system
FR3115358B1 (en) * 2020-10-19 2023-11-24 Nexter Munitions ARTIFICIAL AND EXPLOSIVE PROJECTILE WITH A STABILIZING FLAT

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GB2027855A (en) * 1978-08-08 1980-02-27 Oerlikon Buehrle Ag Sabot projectile
DE3525854A1 (en) * 1985-07-19 1989-01-05 Mauser Werke Oberndorf WING-STABILIZED ARROW BULLET
EP0300373A2 (en) * 1987-07-20 1989-01-25 Oerlikon-Contraves AG Fin stabilised subcalibre projectile
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Cited By (7)

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Publication number Priority date Publication date Assignee Title
US5763809A (en) * 1995-07-19 1998-06-09 Oerlikon Contraves Pyrotec Ag Device for fastening a cartridge case to a projectile
EP0855573A1 (en) * 1997-01-27 1998-07-29 Oerlikon-Contraves Pyrotec AG Sabot for projectile
SG79946A1 (en) * 1997-01-27 2001-04-17 Contraves Pyrotec Ag Sabot for a subcaliber projectile
EP0999426A1 (en) 1998-11-06 2000-05-10 Oerlikon Contraves Pyrotec AG Sabot for sub-caliber projectile
US6324986B1 (en) 1998-11-06 2001-12-04 Oerlikon Contraves Ag Cartridge-case base for a sub-caliber projectile
EP0989381A2 (en) 1999-02-25 2000-03-29 Oerlikon Contraves Pyrotec AG Subcalibre projectile
WO2007057115A1 (en) * 2005-11-18 2007-05-24 Rheinmetall Waffe Munition Gmbh Method for producing a segmented sabot

Also Published As

Publication number Publication date
CA2121100C (en) 1998-02-24
NO941623L (en) 1994-11-14
US5388523A (en) 1995-02-14
EP0624774B1 (en) 1998-06-10
ES2118279T3 (en) 1998-09-16
DE59406170D1 (en) 1998-07-16
JP3429058B2 (en) 2003-07-22
CA2121100A1 (en) 1994-11-14
JPH0755400A (en) 1995-03-03
NO302440B1 (en) 1998-03-02
NO941623D0 (en) 1994-05-03

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