EP0685059B1 - Schlagbolzensicherung und verfahren zu seiner herstellung - Google Patents

Schlagbolzensicherung und verfahren zu seiner herstellung Download PDF

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Publication number
EP0685059B1
EP0685059B1 EP95902158A EP95902158A EP0685059B1 EP 0685059 B1 EP0685059 B1 EP 0685059B1 EP 95902158 A EP95902158 A EP 95902158A EP 95902158 A EP95902158 A EP 95902158A EP 0685059 B1 EP0685059 B1 EP 0685059B1
Authority
EP
European Patent Office
Prior art keywords
strip
fact
firing pin
striker
grooves
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
EP95902158A
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English (en)
French (fr)
Other versions
EP0685059A1 (de
Inventor
Jacques Nicolas
Jean-Paul Oberle
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.)
Manurhin Defense SA
Original Assignee
Manurhin Defense 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 Manurhin Defense SA filed Critical Manurhin Defense SA
Publication of EP0685059A1 publication Critical patent/EP0685059A1/de
Application granted granted Critical
Publication of EP0685059B1 publication Critical patent/EP0685059B1/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
    • 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 field of the present invention is that of safety devices for locking a striker for a revolving projectile rocket.
  • Projectiles including medium caliber shells, are fitted with safety devices intended to prevent initiation of the pyrotechnic chain before firing and during the first tens of meters of the trajectory ballistic.
  • a known security device comprises a lock, by example a split ring, which immobilizes in translation the projectile striker, which is surrounded by a spring hairspring constituted by an elastic ribbon wound on himself.
  • Patent DE1197786 whose description covers the preamble of claim 1, describes such a security device for a medium caliber projectile rocket.
  • the lock consists of a band folded over it even so as to form a ring with a hexagonal profile.
  • the ring forms a stop for a shoulder of the striker prohibiting him from coming to strike a primer.
  • the lock Due to its split structure, the lock is susceptible to open by the action of the centrifugal force which is exerted on him when fired. Opening the lock allows the translation of the striker for example at impact on a target.
  • a spiral spring is wrapped around the lock.
  • the function of the spiral spring is to delay the moment opening the lock. This opening only occurring only after a few tens of meters of trajectory which ensures the safety of the weapon's servants.
  • the centrifugal force exerted on the spring during firing thus causes its progressive unfolding and its winding against the wall of a cylindrical housing of the rocket.
  • the safety device ensures that, when fired, the spiral spring remains correctly wound against its cylindrical housing without coming to form stray loops that could prevent the striker from coming initiate the primer.
  • the subject of the invention is a device for safety device intended to lock a striker for a rocket of a revolving projectile, comprising a spiral spring constituted by an elastic ribbon wound on itself and recalled by its elasticity around an organ of lock that keeps the striker in position security, the locking member being constituted by a flexible band wrapped around the striker and the material or the geometry are such that it does not exercise elastic return force towards the striker, characterized in that the strip has a length such that, when it is found during the firing carried out following the spiral spring and applied against it by the action of centrifugal force, its ends overlap.
  • the strip flexible has grooves, which are preferably oriented towards the striker.
  • the striker may be cylindrical or have a polygonal section, preferably hexagonal.
  • the grooves may have a variable pitch authorizing a winding of the strip on the striker following a polygonal figure.
  • the grooves of the strip will be positioned when winding opposite the vertices of the polygon.
  • the strip is such that, once unrolled following the spring spiral, its ends overlap on a bow included between 60 ° and 180 °.
  • the invention also relates to a method of manufacturing such a device, process characterized in that it includes a step of making the grooves in the strip by knurling a smooth strip between a wheel and a counter pulley.
  • Knurling can be performed with a pitch wheel variable.
  • the strip can be driven between the wheel and the counter pulley by the rotation of an axis polygonal on which the knurled strip is wound, this axis polygonal being formed by the striker.
  • a device for safety 1 is intended to lock a striker 2 in a safe position in which he cannot come strike a primer (not shown).
  • the safety device includes a cylindrical housing 3 closed by a cover 4 which is fixed to the housing by example by screws (not shown).
  • the housing delimits a cylindrical internal housing 14.
  • the housing 3 is pierced with a hole 6 intended to authorize the passage of the tip 2a of the striker 2 to allow the percussion of the primer.
  • the cover has a bore 7 by which the striker 2 enters the housing 3.
  • the striker 2 has a shoulder 8 which comes in support on a locking member 9.
  • the locking device 9 consists of a wound flexible strip in a spiral around a rod 2b secured to the striker 2.
  • the strip 9 has grooves 10 parallel to each other and to axis 11 of the device.
  • Band 9 can be made of brass, copper Berylium, stainless steel or not, nickel, or in reinforced plastic or not. The choice of material will be done according to the desired stiffness for the maintaining the striker 2 and the amplitude of the centrifugal forces developed during the firing for the projectile considered.
  • the function of the grooves 10 is to give a some flexibility to the strip 9, allowing it to be wound up around the rod 2b of the striker 2 and facilitating its unfolding using a minimum of energy.
  • the band will also be defined so that it does not exert an elastic return effort towards the striker both in its rolled-up position shown in Figures 1 and 2 only when it takes place after the shooting, as this will be described later.
  • the strip 9 is kept in the locking position of the striker by a spiral spring 12 of known type.
  • This spring is formed by an elastic brass ribbon, wound on itself, and kept wound on the strip 9 by its own elasticity.
  • Other materials could be used to make the balance spring: Nickel, stainless steel, Copper / Berylium ...
  • An elastic clip 13 made of steel or brass keeps the spiral spring 12 in its position safety shown in Figures 1 and 2, which prohibits any untimely unwinding of the hairspring when the projectile is subjected to vibrations, for example during phases transport.
  • the band 9 is wound on the rod 2b of the striker 2 so that the grooves 10 are oriented outward i.e. towards the spiral spring 12.
  • the centrifugal inertial force first causes the opening clip 13, which is pressed against the cylindrical surface internal 15 of housing 14.
  • the spiral spring 12 then proceeds progressively and is wound in a spiral against the cylindrical surface internal 15.
  • the unwinding of the tape is facilitated by the presence grooves that give flexibility even to a strip relatively thick.
  • the diameter of the striker shoulder 8 is shown by circle 16 in broken lines. We thus see that the band 9 and hairspring 12 present in the unlocked position a winding diameter which is greater than the diameter of the shoulder 8. The striker rod 2 is therefore free to translate into hole 6.
  • Figure 3 also shows that the strip 9 has a length such that in the unlocked position its ends 9a and 9b partially overlap on a corner arc at center ⁇ .
  • This essential characteristic of the invention ensures that the spiral spring 12 is held on an arc of 360 ° by the unrolled strip 9.
  • the covering of the ends of the band maintains the spring with effort substantially equal centrifugal in all directions radial. There is therefore no relative shift of the band and spring and no loops parasites.
  • Band 9 can be given a length such that the overlapping arc has an angle at the center between 60 ° and 180 °, the preferred angle being of the order of 120 °.
  • a strip end 9 is shown in dotted lines 17 giving a 180 ° overlap.
  • the band exerts no recall effort elastic towards the striker in the unrolled position, it does not does not itself present parasitic curvature to its extremities.
  • the band exerting no elastic return effort towards the striker in the rolled position, so it can rotate freely on the striker which facilitates the progress of the spiral and allows to define a rocket whose striker is fixed in rotation.
  • FIGS. 4 and 5 show an alternative embodiment which does not differ from the mode described with reference to FIGS. 2 and 3 as by the orientation of the strip 9.
  • the strip 9 is wound on the rod 2b of striker 2 with its grooves 10 oriented towards inside ie towards the striker.
  • the material of the strip can advantageously be chosen as it undergoes by the action of centrifugal force plastic deformation allowing it to remain in the unlocking position shown in Figures 3 and 5.
  • Figure 6 shows in cross section and position security a second embodiment of the invention.
  • the rod 2b of the striker 2 a a hexagonal section.
  • Band 9 has grooves 10 which are oriented inward, i.e. towards the rod 2b of the striker, and which are arranged opposite the edges of the hexagon.
  • the different grooves 10 are produced on the strip 9 with a variable pitch which allows the winding of the band 9 around the rod 2b.
  • the pitch of the grooves is constant for the six first grooves which allows the winding of a first layer of tape around the six sides of the rod of the striker. Then the pitch increases for the six grooves following values proportional to the thickness of the strip 9, thus authorizing the winding of a second layer of strip 9 around the hexagon formed by the first layer. The step then increases for the layers following.
  • the total length of the strip is chosen as above so as to ensure overlapping of its ends when following the shot it is wound on the spiral spring by the action of centrifugal force.
  • Such an embodiment allows like the previous one ensure good retention of the spiral spring due to the contact of the smooth face of the strip on this one.
  • the striker will be mounted free in rotation in the rocket so as to facilitate the unwinding hairspring.
  • a good winding also avoids misalignments of the strip and the striker likely to cause unbalanced which affect the proper functioning of the rocket.
  • the hairspring is wound when the device is assembled also facilitated by the angular connection of the strip and the striker.
  • This strip is wound four turns on a rod of hexagonal striker (face width 1.6mm) and receives a spiral spring 1m long.
  • the ends of the strip overlaps with an arc of 100 ° angle in the center.
  • variable pitch of the grooves will be chosen according to the number of faces of the polygon.
  • Figure 7 shows schematically a step of manufacturing the flexible tape which is used in the embodiments Figures 2 to 5.
  • the raw tape 91 is cut from a reel not represented. It goes between a knurled wheel 18 and a against pulley 19.
  • the knurled wheel is made of steel, it is driven in the Z direction by a motor 20 and ensures both pulling the raw tape 91 and achieving on the latter grooves 10.
  • the wheel 18 carries teeth 21 with a profile. triangular, the length of which is greater than or equal to the width of the strip 9 and the pitch of which determines the pitch of the splines 10.
  • the counter pulley is freely mounted on bearings 22, the distance between the counter pulley and the knurled wheel is adjustable to adjust the depth of the grooves 10.
  • the counter pulley 19 has a width greater than or equal to that of the band, it is covered with rubber to promote the training of the band and avoid any relative slip.
  • the strip 9 on which the grooves 10 are made is then cut to the desired length using knives 23 whose known drive means are not not shown.
  • This embodiment also makes it possible to give the band a camber directed towards the knurled wheel, which facilitates its subsequent winding on the striker.
  • Figure 8 shows schematically a step of manufacturing the flexible strip which is used in the embodiment in Figure 6.
  • the raw strip 91 passes between the knurled wheel 18 and the against pulley 19.
  • the knurled wheel is still driven in the Z direction by a motor 20 and ensures the traction of the strip rough 91 and making the grooves 10.
  • the counter pulley 19 is freely mounted on bearings 22, the distance between the counter pulley and the knurled wheel is still adjustable.
  • the knurled wheel carries teeth 21 whose pitch is variable. She thus wears six first teeth 21a, relatively close together others and dismissed with a constant first step.
  • first teeth are followed by six second teeth 21b, a little further apart from each other by a second constant step.
  • the second teeth are finally followed by six thirds teeth 21c, further apart from one another by third constant step.
  • the set of teeth 21a, 21b and 21c makes it possible to produce on the raw strip 91 grooves whose variable pitch authorizes the winding of the strip 9 on a hexagonal rod as previously described.
  • the strip 9 is then cut to the desired length at knife medium 23.
  • This hexagonal axis will preferably be constituted by the rod 2b of striker 2, rotated in the direction Z 'by a motor not shown.

Landscapes

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

Claims (10)

  1. Sicherheitsvorrichtung zur Verriegelung eines Schlagbolzens eines Kreiselgeschossflugkörpers, wobei diese Vorrichtung eine Spiralfeder (12) umfasst, die aus einem elastischen, um sich selbst aufgewickelten Band besteht und durch ihre Elastizität um ein Verriegelungsorgan zurückgezogen wird, das den Schlagbolzen (2) in Sicherheitsstellung hält, wo das Verriegelungsorgan aus einem flexiblen Band (9) besteht, das um den Schlagbolzen (2) gewickelt ist, und dessen Werkstoff oder Geometrie so beschaffen sind, dass es keine elastische Rückzugkraft in Richtung des Schlagbolzens (2) ausübt, dadurch gekennzeichnet, dass das Band eine derartige Länge aufweist, dass sich seine Enden (9a, 9b) überdecken, wenn es beim Schuss nach der Spiralfeder (12) abgewickelt und durch die Wirkung der Zentrifugalkraft gegen die Feder gedrückt wird.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass das flexible Band Rillen (10) aufweist.
  3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Rillen (10) zum Schlagbolzen (2) gerichtet sind.
  4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Schlagbolzen zylindrisch ist.
  5. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass die Rillen (10) eine variable Teilung haben, die ein Aufwickeln des Bands (9) am Schlagbolzen nach einer polygonalen Figur ermöglicht.
  6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass der Schlagbolzen (2b) einen polygonalen, vorzugsweise sechseckigen Querschnitt aufweist, wobei sich die Rillen (10) des Bands bei seinem Aufwickeln gegenüber den Gipfeln des Polygons positionieren.
  7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass sich die Enden des Bands nach Abwickeln nach der Spiralfeder in einem Bogen zwischen 60° und 180° überdecken.
  8. Herstellungsverfahren einer Vorrichtung nach einem der Ansprüche 2 bis 7, dadurch gekennzeichnet, dass es eine Herstellungsetappe der Rillen (10) des Bands durch Rändeln eines glatten Bands zwischen einem Rändelwerkzeug (18) und einer Gegenrolle (19) umfasst.
  9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass das Rändeln mit einem Rändelwerkzeug (18) mit variabler Teilung durchgeführt wird.
  10. Verfahren nach einem der Ansprüche 8 oder 9, dadurch gekennzeichnet, dass das Band zwischen dem Rändelwerkzeug und der Gegenrolle durch die Drehung einer polygonalen Achse mitgenommen wird, auf die sich das Rändelband (9) aufwickelt, wobei diese polygonale Achse aus dem Schlagbolzen (2b) besteht.
EP95902158A 1993-12-17 1994-11-22 Schlagbolzensicherung und verfahren zu seiner herstellung Expired - Lifetime EP0685059B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9315203 1993-12-17
FR9315203A FR2714169B1 (fr) 1993-12-17 1993-12-17 Dispositif de sécurité pour verrouiller un percuteur et procédé de fabrication de ce dispositif.
PCT/FR1994/001356 WO1995016891A1 (fr) 1993-12-17 1994-11-22 Dispositif de securite pour verrouiller un percuteur et procede de fabrication de ce dispositif

Publications (2)

Publication Number Publication Date
EP0685059A1 EP0685059A1 (de) 1995-12-06
EP0685059B1 true EP0685059B1 (de) 1998-09-09

Family

ID=9454047

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95902158A Expired - Lifetime EP0685059B1 (de) 1993-12-17 1994-11-22 Schlagbolzensicherung und verfahren zu seiner herstellung

Country Status (8)

Country Link
US (1) US5625161A (de)
EP (1) EP0685059B1 (de)
AU (1) AU678654B2 (de)
DE (1) DE69413207T2 (de)
FR (1) FR2714169B1 (de)
SG (1) SG54298A1 (de)
TR (1) TR27938A (de)
WO (1) WO1995016891A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6564716B1 (en) * 2001-12-05 2003-05-20 Kdi Precision Products, Inc. Fuzes having centrifugal arming lock for a munition

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US859610A (en) * 1904-12-05 1907-07-09 Bethlehem Steel Corp Centrifugal percussive fuse for projectiles.
DE1197786B (de) * 1963-12-19 1965-07-29 Junghans Geb Ag Fliehspiralbandsicherung fuer Drallgeschosszuender, insbesondere fuer Zerlegerzuender
US3516359A (en) * 1968-01-25 1970-06-23 Junghans Gmbh Geb Centrifugal spiral band locking device,especially for self-destroying fuzes
FR2429992A1 (fr) * 1978-06-27 1980-01-25 Diehl Gmbh & Co Dispositif de securite a bande spirale centrifuge pour detonateur de projectile anime d'un mouvement giratoire
FR2537265A1 (fr) * 1982-12-07 1984-06-08 Manurhin Dispositif de securite a organes de verrouillage annulaires pour projectile giratoire
DE3739368A1 (de) * 1987-11-20 1989-06-01 Dynamit Nobel Ag Vorrohrsicherung an einem geschoss mit aufschlagzuender
US5147974A (en) * 1990-11-06 1992-09-15 Motorola Inc. Unwinding ribbon safing and arming device

Also Published As

Publication number Publication date
WO1995016891A1 (fr) 1995-06-22
SG54298A1 (en) 1998-11-16
DE69413207D1 (de) 1998-10-15
AU678654B2 (en) 1997-06-05
US5625161A (en) 1997-04-29
FR2714169A1 (fr) 1995-06-23
EP0685059A1 (de) 1995-12-06
TR27938A (tr) 1995-10-26
FR2714169B1 (fr) 1996-02-09
AU1111495A (en) 1995-07-03
DE69413207T2 (de) 1999-03-04

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