SE504857C2

SE504857C2 - Method at substrate part and substrate part

Info

Publication number: SE504857C2
Application number: SE9501546A
Authority: SE
Inventors: Ulf Hellman
Original assignee: Bofors Ab
Priority date: 1995-04-27
Filing date: 1995-04-27
Publication date: 1997-05-12
Also published as: WO1996034250A1; SE9501546L

Abstract

The present invention relates to a submunition (1) designed to be triggered on impact with hard or soft surfaces and which for this reason incorporates two counter-opposed movable strikers (9, 6) each of which interacts with its own primer (15, 14) and where one striker (9) is driven to impact against its primer (15) by a piston (10) covering most of the base area of the submunition and projecting below the remainder of the submunition in fall attitude and which piston can be depressed against the effect of a weak spring (11) while the other striker (6) is of an admittedly known type which during the free fall of the submunition is held retracted by a deceleration band (5) so that when the submunition is suddenly decelerated on impact the striker (6) is driven down against its interacting primer (14) by a drop weight (7) screwed onto the said striker (6).

Description

504 857 utlösningsfunktion där den första utlösningsfunktionen är avsedd att ge utlösning vid anslag mot mycket mjuk mark av tidigare antydda typer medan den andra utlösningsfunktionen som är av en i och för sig känd generell typ har till uppgift att ge utlösning vid anslag mot främst hårda underlag. 504 857 trigger function where the first trigger function is intended to give trigger when striking against very soft ground of previously indicated types, while the second trigger function which is of a per se known general type has the task of giving trigger when striking against mainly hard surfaces.

Mjukmarksinitieringsfunktionen innefattar ett första slagstift vars förskjutning i riktning mot den egna tändhatten regleras av en mot substridsdelens fallrikt- ning rörlig kolv som täcker åtminstone huvuddelen av substridsdelens i fall- riktningen nedåt vända botten och som sticker ut en bit frarnom den övriga substridsdelen och vars intryckning sker mot verkan av en förhållandevis vek fjäder, som dock orkar hålla kolven mot luftmotståndets påverkan.The soft ground initiation function comprises a first striker whose displacement in the direction of its own spark plug is regulated by a piston movable towards the fall direction of the sub-part which covers at least the main part of the sub-part of the sub-part facing downwards and which protrudes some distance from the rest of the sub-part. against the action of a relatively weak spring, which, however, manages to hold the piston against the influence of air resistance.

Hårdrnarksinitieringsfiinktionen består av ett i substridsdelens fallriktning rörligt slagstift av en i och för sig känd typ som är försedd med en pågängad fallvikt och som då substridsdelen slår i marken driver slagstiftet, som under substridsdelens fria fall hållits utdraget av ett fäst drag- eller bromsband, ned mot den egna tändhatten. Fallvikten kan även användas som extra Säkrings- funktion i och med att dragbromsbandet först måste gänga upp fallvikten längs slagstiftet, vilket i sin tur sker genom att dragbromsbandet vrider runt slag- stiftet under fallet. Dragbromsbandet fungerar därvid som en sorts bromsande propeller.The hardwood initiation function consists of a percussion pin movable in the direction of fall of the substrate part of a per se known type which is provided with an applied drop weight and which when the substrate part strikes the ground drives the striker, which during the free fall of the substrate part is pulled out by a fixed traction or brake band. against your own spark plug. The drop weight can also be used as an extra securing function in that the traction brake belt must first thread up the drop weight along the striker pin, which in turn is done by the traction brake belt rotating around the striker pin during the fall. The traction brake belt then functions as a kind of braking propeller.

Utöver ovan beskrivna funktioner uppvisar substridsdelen enligt uppfinningen även en säkringsslid i vilken de bägge tändhattama fmns lagrade och som i ett ursprungsläge av de bägge slagstiften hindras att inta sitt osäkrade läge med de bägge tändhattama i linje med slagstiften. Säkringsslidens generella utformning får anses vara av i och för sig känd typ.In addition to the functions described above, the substrid part according to the invention also has a securing slide in which the two spark plugs are stored and which in an original position of the two striking pins is prevented from occupying its unsecured position with the two spark plugs in line with the striking pins. The general design of the safety slide can be considered to be of a type known per se.

Sättet och anordningen enligt uppfinningen fmns definierade i de efterföljande patentkraven och den skall nu något ytterligare beskrivas under hänvisning till bifogade ñgurer.The method and device according to the invention are defined in the following claims and it will now be described somewhat further with reference to the appended claims.

Av dessa visar Fig 1 ett längdsnitt genom en substridsdel utformad i enlighet med uppfinningen med samtliga funktioner i säkrat läge medan Fig 2 visar samma substridsdel i osäkrat läge klar för utlösning. 5 0 4 8 5 7 Samtliga delar har givetvis samma hänvisningsteckningar på bägge ﬁgurema.Of these, Fig. 1 shows a longitudinal section through a substrate part designed in accordance with the invention with all functions in a secured position, while Fig. 2 shows the same substrate part in an unsecured position ready for release. 5 0 4 8 5 7 All parts of course have the same reference drawings on both guras.

Substridsdelen 1 innefattar ett yttre splitterskal 2, en explosivladdning 3, ett i urspnmgsläget i en övre fördjupning 4 i splitterskalet 2 invecklad flygstabili- serings- eller dragbromsband 5, ett i det senare infäst vridbart slagstift 6 för hårda underlag, ett undre slagstift 9 för mjuka underlag samt en sidoförskjut- bar säkringsslid 12.The substrid part 1 comprises an outer splitter shell 2, an explosive charge 3, an air stabilization or traction brake band 5 entangled in the original position in an upper depression 4 in the splitter shell 2, a laterally rotatable impact pin 6 for hard surfaces, a lower impact pin 9 for soft base and a laterally displaceable securing slide 12.

Slagstiftet 6 för hårda underlag är gängat åtminstone längs sin närmast den egna nedre slagspetsen 8 liggande delen. På denna del är en kombinerad säkringsmutter-fallvikt 7 pågängad. I ursprungssäkringsläget befinner sig säkringsmuttern-fallvikten 7 i det på ñg 1 visade läget. Så snart substridsdelen l lämnat sin bäraiprojektil kommer ﬂygstabiliseringsdragbromsbandet 5 att vecklas ut vilket i sin tur resulterar i att detta och slagstiftet 6 roterar och fallvikten 7 gängas ner längs slagstiftet 6 till det på ﬁg 2 visade läget. Eftersom dragbromsbandet 5 samtidigt bromsas dras slagstiftet 6 ut. Detta innebär att den ena av blockeringama för den i sidled förskjutbara säkringssliden 12 förts åt sidan. Som framgår av figurema ñnns en fjäder 13 som påverkar Säkrings- sliden 12 i riktning mot det på fig 2 visade osäkrade läget. Detta läge kan den emellertid ej nå förrän bägge slagstiften 6 och 9 förts åt sidan till det på fig 2 visade läget. Säkringssliden innefattar vidare en övre och en undre tändhatt 14 resp 15 samt ett initieringspiller 16.The striking pin 6 for hard surfaces is threaded at least along its part lying closest to its own lower striking tip 8. On this part a combined safety nut drop weight 7 is applied. In the original securing position, the securing nut drop weight 7 is in the position shown on ñg 1. As soon as the substrid part 1 has left its support projectile, the stabilizing traction brake band 5 will unfold, which in turn results in this and the striker pin 6 rotating and the drop weight 7 being threaded down along the striker pin 6 to the position shown in Fig. 2. Since the traction brake belt 5 is simultaneously braked, the striker pin 6 is pulled out. This means that one of the blocks for the laterally displaceable securing slide 12 is moved to the side. As can be seen from the figures, there is a spring 13 which acts on the securing slide 12 in the direction of the unsecured position shown in Fig. 2. However, it cannot reach this position until both striking pins 6 and 9 have been moved aside to the position shown in Fig. 2. The safety slide further comprises an upper and a lower ignition cap 14 and 15, respectively, as well as an initiating pellet 16.

Utforrrmingen av utlösningsfunktionen för hårt underlag (dragbromsbandet 5, slagstiftet 6 och fallvikten 7) skiljer sig från tidigare kända konstruktioner främst genom att placeringen av säkrings-iriitieringsfunktionen i substrids- delens 1 i fallriktningen nedre del inneburit att slagstiftet 6 har kunnat ges en extremt lång styrdel vilket i sin tur inneburit en mycket säker funktion eftersom risken för att slagstiftet 6 skulle kärva enligt byrålådsprincipen helt kunnat uteslutas.The design of the release function for hard surfaces (traction brake belt 5, impact pin 6 and drop weight 7) differs from previously known constructions mainly in that the placement of the safety irritation function in the lower part of the sub-section 1 means that the impact pin 6 has been given an extremely long guide. which in turn entailed a very safe function since the risk that the impact pin 6 would jam according to the bureau principle could be completely ruled out.

Det undre i enlighet med uppfinningen utformade slagstiftet 9 är infäst i en nedåt vänd förskjutbar kopp, botten eller kolv 10 som av en förhållandevis vek bottenfjäder 11 påverkas mot det på fig 2 visade osäkrade läget. Så länge sub- stridsdelen 1 befinner sig i den egna bäraren hålls kolven 10 i säkiingsläget av den övre avfasade delen 17 av bakomvarande substridsdel. På fig 1 är en del av den bakomvarande substridsdelen antydd med streckade linjer (17). 504 857 Så snart substridsdelen 1 lämnat sin bärare kommer således blockeringen av kolven 10 att upphöra och demia kommer att överföras till det osäkrade ﬁg 2 läget. I realiteten torde detta sålunda hinna ske före fallvikten 7 har hunnit att helt gängas ned längs slagstiftet 6.The lower strut pin 9 designed in accordance with the invention is fixed in a downwardly facing displaceable cup, bottom or piston 10 which is actuated by a relatively folded bottom spring 11 towards the unsecured position shown in Fig. 2. As long as the substride part 1 is in its own carrier, the piston 10 is held in the securing position by the upper beveled part 17 of the substrid part behind. In Fig. 1, a part of the underlying substrate part is indicated by dashed lines (17). 504 857 As soon as the substrate part 1 has left its carrier, the blocking of the piston 10 will thus cease and the demia will be transferred to the unsecured ﬁ g 2 position. In reality, this should thus take place before the drop weight 7 has had time to be fully threaded down along the striker pin 6.

Ordningsföljden är emellertid inte kritisk däremot måste båda slagstiften 6 och 9 föras undan innan säkringssliden 12 kan föras över till osäkrat läge. Det är således i det på ﬁg 2 visade läget som substridsdelen 1 kommer att falla mot marken uppstyrd av dragbromsbandet 5 som alltså förutom sin funktion att gänga upp fallvikten 7 även svarar för att substridsdelen närmar sig marken med rätt ända först.However, the order is not critical, however, both percussion pins 6 and 9 must be removed before the securing slide 12 can be moved to an unsafe position. It is thus in the position shown on ﬁ g 2 that the sub-stride part 1 will fall towards the ground supported by the traction brake belt 5 which thus in addition to its function of threading up the fall weight 7 is also responsible for the sub-stride part approaching the ground right first.

Om nu den i enlighet med ﬁg 2 fallande substridsdelen når marken och skulle råka slå emot ett hårt föremål så kommer den därvid uppkomna snabba uppbromsningen att innebära att fallvikten 7 driver ned slagstiftet 6 i tändhatten 14 som initierar initieringspillret 16 varvid huvudladdningen 3 bringas att detonera.If now the subside part falling in accordance with ﬁ g 2 reaches the ground and should happen to hit a hard object, the resulting rapid braking will mean that the drop weight 7 drives the percussion pin 6 into the spark plug 14 which initiates the initiation pill 16, causing the main charge 3 to detonate.

Om substridsdelen däremot faller ned mot ett mjukt underlag så kommer kolven 10 med dess stora bottenyta som motsvarar i princip nästan hela substridsdelens bottenyta att mot fjäderns 11 begränsade motstånd tvingas uppåt och i sin tur med s1agstiftet9 initiera tändhatten 15 som initierar initieringspillret 16 varvid huvudladdningen 3 detoneras.If, on the other hand, the substrate part falls down against a soft surface, the piston 10 with its large bottom surface which corresponds in principle to almost the entire bottom surface of the substrate part will be forced upwards against the limited resistance of the spring 11 and in turn with the saw pin 9 initiate the igniter cap 15. .

Ovan beskrivna funktion ger alltså en dubbel initieringssäkerhet och svarar för att substridsdelen skall detoneras vid såväl hårda som mjuka underlag. Ofta torde därvid båda initieringsfunktionerna att aktiveras.The function described above thus provides a double initial safety and is responsible for the substrate part being detonated on both hard and soft surfaces. Often, both initiation functions should be activated.

Claims

504 857 PATENT REQUIREMENTS

1. In the case of such subterranean parts (1) which are spread from artillery grenades, missiles or the like over a predetermined target area, ensure the initiation and consequent detonation of the incoming explosive charge (3) in the event of impact on soft surfaces such as wetlands, sand and loose snow. that for said initiation a displaceable pin (9) displaceable towards the ignition cap (3) intended for initiating the explosive charge (3) is used, the displacement of which against the ignition cap is made dependent on the depression against the action of a folded spring (1 1) of at least the main part of the bottom surface of the substrate part during free fall facing downwards covering relative to this displaceable piston (10) or equivalent as when the substrate part (1) approaches the ground plane protrudes below the rest of the substrate part.

Method according to claim 1, characterized in that the percussion pin (9) is used to keep the substrate part (1) secured as long as it remains in the carrier in which the substrate parts (1) are arranged in rows one behind the other and where each substrate substrate part (17) is caused, against the action of said spring (11), to hold the displaceable piston (10) on the front sub-strut part so that it in turn keeps the striker pin (9) pressed and thereby prevents a spring-loaded (13) securing slide (13) formed in a manner known per se. 12) to bring said spark plug cap (15) in line with the path of movement of the percussion pin (9).

Method according to Claim 2, characterized in that the release of the substride part (1) on impact against all types of ground is ensured by supplementing the proximal striking pin (9) and the cooperating securing slide (12) with other striking pin (6) with associated spark plug (14). ) wherein said second percussion pin (6) is designed in a manner known per se with a traction brake band (5) which pours the percussion pin (6) extended or raised as long as the sub-stride part (1) falls and a drop weight (7) which drives the percussion pin (6) down towards the own ignition cap (14) when the substrate part (1) is in the ground.

Substrate part (1) of the type intended to be spread over a target area from a carrier in the form of a grenade, missile or equivalent and which in accordance with the method according to claims 1-3 is ensured for initiation in the event of impact even in soft surfaces such as wetlands , sand and loose snow, characterized in that in addition to its own main charge (3) it comprises a release function in the form of a percussion displaceable pin (9) axially displaceable towards a spark plug (15) in the longitudinal direction of the substrate part, the movement of which in the direction of the spark plug is dependent of a piston (10) movable in the same direction against the action of a bent spring (11) or the like whose bottom surface facing downwards in the fall direction of the sub-section (1) covers at least the main part of its bottom area and which when the sub-section (1) is unsecured protrudes below the rest of the substrate part (1).

Substrate part (1) according to claim 4, characterized in that it also comprises a securing slide (12) displaceable transversely to its own longitudinal direction, comprising the ignition cap (15) intended for co-operation with the striking pin and which is loaded by its own spring (II) to be displaced from a first securing position, where the spark plug (15) is out of line with the percussion pin (9) to a second unsecured position where it is in line with the percussion pin (9) and wherein the securing slide (12) is kept in a secured position by the percussion pin (9) as long as the piston (10) is kept depressed, but is transferred to an unsafe position as soon as the piston (10) is pushed out by its own weak spring (11) and the percussion pin (9) is thereby moved away.

Substrate part (1) according to Claim 5, characterized in that it comprises, in addition to the percussion pin (9) displaceable by the piston (10), a second percussion pin (6) movable in the direction of fall of the sub-part part of a type known per se as of a traction brake band ( 5) when the substrate part (1) is during free fall, the extension is held so that when the substrate part strikes the ground by a drop weight (7) applied around the percussion pin (6), it is driven down towards a second ignition cap (14) similarly arranged in the safety slide.

Substrate part (17) according to either of Claims 4 to 6, characterized in that it is designed so that it is placed in its carrier, the substrate parts lying in rows one after the other holding the piston (10) on a remote substrid part (1) depressed in the securing position.