FR2668255A1 - DEVICE FOR SOLIDARIZING GRENADES WITHIN A ROTATING PROJECTILE AROUND ITS LONGITUDINAL AXIS. - Google Patents

Abstract

The present invention relates to a projectile carrying sub-munitions, driven in a rotational movement about its longitudinal axis. The projectile comprises a central part (8) which extends longitudinally in the body (7) of the projectile and means (10, 12) for making said part integral with the body (7) of the projectile. The part (8) substantially matches the shapes of the sub-munitions (9) which surround it so as to entrain them in the rotational movement of the projectile. One field of application of the invention relates to grenade dispersing projectiles.

Description

AT

DEVICE FOR SOLIDARIZING

  GRENADES WITHIN A PROJECTILE

ROTATING AROUND HIS AXIS

LONGITUDINAL

  The present invention relates to a transport projectile

  so many submunitions, animated by a rotational movement

around its longitudinal axis.

  A particular field of application of this invention

  The projectiles are fired from a striped mortar allowing the body of the projectiles to be rotated at the moment of launch. The trajectories of these projectiles are, therefore, more stable. On the other hand, these projectiles generally comprise a detachable base for the ejection of grenades. The principle of ejection then rests on the use of a piston which exerts on the base a sufficient force for the base detaches from the body of the projectile and the grenades leave through the opening thus created; the separation of the grenades then results from their

  different tangential speeds.

  However, it is necessary to ensure that the grenades embedded in a projectile are integral with the body of the projectile in its rotational movement, in order to avoid

  all disorder in the initial arrangement of the grenades.

  Some known projectiles have been developed for this purpose. However, as we shall see more

  subsequently, such projectiles use means of solidarity

  complicated and costly grenades.

  In addition, the grenades must follow, after ejection, a determined trajectory which gives them on the one hand, a good angle of impact on the ground, necessary for the firing of their explosive charge, and on the other hand, a distribution Homogeneous It is therefore very desirable to eliminate the best disruptive elements on the trajectories of grenades during their ejection, these disruptive elements may be for example, for a given grenade, other grenades or wedging elements in the projectile Gold existing devices do not meet this requirement, for

  reasons that we will detail later.

  The present invention aims to overcome the aforementioned drawbacks by proposing a projectile which contains a simple means of securing the grenades relative to the movement of the projectile while eliminating the elements

mentioned disrupters.

  More specifically, the invention relates to a projectile carrying submunitions and driven in a rotational movement about its longitudinal axis, characterized in that it further comprises: a part around which are disposed the submunitions, and who marries substantially the shape of the submunitions; means for securing said part to the body of the projectile so as to cause the submunitions in

  the rotational movement of the projectile.

  Other features and advantages will appear at

  course of the description which follows, with reference to the figures

  FIG. 1 is a cross-section of a known projectile; FIG. 2 illustrates a submunition solidarity system in a projectile used according to the invention; FIG. 3 is a longitudinal section of the

  projectile according to a possible embodiment of the invention.

  FIG. 1 illustrates a known system for securing submunitions, for example grenades, inside a projectile. The projectile has a body 5 inside which are placed the grenades 1, 6 The grenades located at the inner periphery of the body 5 are wedged by means of a circular rod 2 comprising as many means of

  external wedges 3 that there are grenades The

  2 is itself keyed into a longitudinal groove 4 relative to the body 5 of the projectile, so as to block all the grenades 1 in rotation A central grenade 6

  is maintained by peripheral grenades 1.

  Such a system is relatively heavy and expensive.

  On the other hand, it is noted that each peripheral grenade 1 is in contact with three other grenades and the wedging means, and that the central grenade 6 is tangent to the six peripheral grenades These contacts, as well as the circular rod 2, will favor the disturbances on the trajectories of the grenades during their ejection Finally, the presence of the longitudinal groove 4 complicates the achievement of the longitudinal seal. FIG. 2 is a cross-section of a submunition-carrying projectile, for example grenades, according to a possible embodiment of the invention: The body 7 of the projectile comprises, according to the invention, a central part 8 called ridge, integral with the body 7 of

  projectile by means that we will describe later.

  The edge 8 substantially conforms to the shape of the grenades 9 surrounding it, thereby driving them into the rotational movement of the body 7 of the projectile. In addition, the brace shape of the edge 8, according to a possible embodiment. prevents the grenades 9 from being in contact with each other To carry out the ejection of the grenades according to the same principle as above, all that is required is to push the grenadier-edge assembly.

  outside the body of the projectile by a longitudinal translation.

  Each grenade 9, under the action of the centrifugal force, is then ejected, and finds no disturbing element, such as other grenades or wedging means, on its path. FIG. 3 shows a longitudinal section, along the axis XX 'of FIG. 2, of the projectile according to a possible embodiment of the invention: the projectile carries several grenades 9 placed longitudinally in columns by

  relative to the body 7 of the projectile, around the central ridge 8.

  In this embodiment, the fastening of the edge 8 and the body 7 of the projectile is achieved by means of a detachable base 10 fixed, by means of pins 11 for example, on the body 7 of the projectile Part 12 the base 10 has a shape that allows the insertion of the edge 8, thus blocking the edge 8 in rotation It can be noted that the seal is made very simply, using, for example, a seal

O-ring 13.

  In addition, in the case where the grenades have a very particular shape, as shown in section for the pomegranate 14, it is possible to embed the conical end of a grenade in the portion 16 of complementary shape of the following grenade. preferably, the last layer of grenades 14 is itself embedded in the base 10 of the projectile, in order to save space. The maintenance of the grenades of the

  last layer 14 is made, for example, by a wall 17.

  In addition, the projectile comprises an ejection system according to a possible embodiment: a rocket 18 allows the firing of an ejection charge 19 contained in a gas generator 20 The gases from the combustion create an overpressure in a chamber 21, one of the walls constituting a piston 22 The piston 20 exerts on the central ridge 8 a longitudinal force sufficient to detach the base 10 from the body 7 of the projectile The grenades 9 are then released, and dissociate some others because of their speeds

different tangentials.

  In a possible embodiment of the invention, the projectile also comprises a spring 23 placed between the end of the central edge 8 and the base 10, and held longitudinally, for example by means of walls 24. longitudinal of the spring 23 facilitates the ejection of grenades 14

embedded in the base 10.

  The projectile according to the invention has been described for a particular pellet ejection principle. It should be noted that the system for joining the grenades with the projectile in its rotational movement is not limited to

  no way to this principle of ejection.

Claims (6)

  1 projectile carrying submunitions and rotated about its longitudinal axis, characterized in that it further comprises a room around which are disposed the submunitions, and which substantially marries the shape of the sub-ammunition - ammunition; means for securing said part to the body of the projectile so as to cause the submunitions in   the rotational movement of the projectile.   2 projectile according to claim 1, characterized in that said piece extends longitudinally in the projectile   and is centered substantially on the longitudinal axis of the projectile.   3 Projectile according to any of the   preceding claims, characterized in that the   submunitions are arranged in columns substantially parallel to the longitudinal axis of the projectile, and in that the shape of said part prevents any contact between submunitions   not belonging to the same column.   4 Projectile according to any of the   preceding claims, characterized in that it comprises a   detachable base attached to the body of said projectile.   Projectile according to claims 3 and 4,   characterized in that each of said columns contains a   submunition recessed in said base.   6 Projectile according to claim 4, characterized in that it comprises, in addition, a piston which exerts on said piece, a sufficient longitudinal force, so as to detach   said pellet of the body of the projectile and to push the sub-   ammunition outside. 7 Projectile according to claim 5, characterized in that the ejection of submunitions embedded in the base is facilitated by the longitudinal action of a spring placed   between the end of said piece and said base.   8 Projectile according to one of the preceding claims   tes, characterized in that said fastening means of the piece to the body of the projectile consist of a portion of the base whose shape allows the isolation of said piece of way to block it in rotation.