EP4105591A1 - Vorrichtung zur positionierung eines geschosses - Google Patents

Vorrichtung zur positionierung eines geschosses Download PDF

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Publication number
EP4105591A1
EP4105591A1 EP22179317.7A EP22179317A EP4105591A1 EP 4105591 A1 EP4105591 A1 EP 4105591A1 EP 22179317 A EP22179317 A EP 22179317A EP 4105591 A1 EP4105591 A1 EP 4105591A1
Authority
EP
European Patent Office
Prior art keywords
projectile
support
positioning device
tube
frame
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.)
Pending
Application number
EP22179317.7A
Other languages
English (en)
French (fr)
Inventor
Ludovic Dupont
Maxime COLLARD
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.)
Knds France
Original Assignee
Nexter Systems 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 Nexter Systems SA filed Critical Nexter Systems SA
Publication of EP4105591A1 publication Critical patent/EP4105591A1/de
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A9/00—Feeding or loading of ammunition; Magazines; Guiding means for the extracting of cartridges
    • F41A9/38—Loading arrangements, i.e. for bringing the ammunition into the firing position
    • F41A9/39—Ramming arrangements
    • F41A9/42—Rammers separate from breech-block

Definitions

  • the technical field of the invention is that of devices for positioning projectiles in a chamber of a rifled weapon, in particular of large caliber.
  • the positioning of a projectile that is to say the sinking of the projectile into the chamber of the barrel of the rifled weapon, aims to jam the projectile in the forcing cone of the weapon thanks to his belt so that he is kept in this position within the weapon while waiting to be fired.
  • the projectile is roughly guided to the forcing cone by the inner wall of the tube.
  • the chamber allows unwanted oscillations of the projectile during the pulse. Such oscillations can cause unsatisfactory collisions of the projectile in the forcing cone because the projectile is off axis with respect to the longitudinal axis of the tube when it comes into contact with the forcing cone.
  • the tube comprises in its lower rear part a zone called a spoon which corresponds to a slight recess in the chamber.
  • This spoon is intended to allow propellant charges to be partially housed within it and has a retaining edge which is located towards the rear of the chamber in order to retain the charges in the chamber when the weapon is pointing at a positive website.
  • the spoon causes a local increase in the diameter of the chamber which then allows, when placing the projectile in position, more ample oscillations of the projectile in a vertical plane passing through the axis of the weapon. The risk of unsatisfactory hooking of the projectile is therefore particularly present when the projectile oscillates in said vertical plane.
  • the present invention proposes a positioning device aimed at ensuring correct positioning of the projectile from the initial impulse by the impeller, by reducing the risks of the projectile being misaligned with respect to the longitudinal axis of the weapon, whether or not it includes a spoon.
  • the subject of the invention is thus a device for positioning a projectile in a chamber of a weapon barrel, comprising a discharge impeller comprising a frame which defines a projectile reception space, extending along an axis of the frame and open at one end of the frame, which end is intended to be placed facing an inlet of the tube, and at least one thrust member of the projectile capable of being driven by an alternating translational movement , along the said axis, between an initial position, before the projectile is pushed back, and a final position, from which the projectile is projected towards its positioning position
  • the positioning device comprises also a support for guiding the introduction of the projectile into the tube, the support being rigid and secured to the at least one thrust member so as to be movable in translation with the latter, the support being configured to be located in the reception space when the at least one thrust member is in the initial position and allow the projectile to be supported by the support before discharge, and to be at least partly cantilevered from said end of the frame when the at least one thrust member is
  • the support constitutes a means of closing the spoon in the final position of the at least one thrust member.
  • spoke closure is understood to mean that the support extends above the spoon to cover a major part of the latter, to such an extent that the support forms a bridge extending from the retaining edge to the vicinity of the end of the spoon where the latter joins the conical part of the chamber. This results in the sizing of the length of the support according to the dimensions of the spoon.
  • the support comprises an introduction part, capable of penetrating into the tube during discharge, which includes the front end of the support, and a connecting part by which the support is secured to the at least one thrust member , the introduction part being in the form of a plate of uniform thickness and curved in the form of a trough following an arc of a cylinder of revolution whose axis is aligned with the axis of the frame, the free transverse edge of the plate forming the front end of the support.
  • the introduction part and the connecting part are formed by the same curved plate in the shape of a trough.
  • the plate forming the introduction part, and where appropriate also the connecting part has an opening angle equal to a constant value, for example a value between 100° and 180°, over all or part of its length, for example over three quarters of its length starting from the connecting part.
  • the opening angle can advantageously be 170°.
  • stiffen the support which can be done for example by adding stiffeners.
  • said plate has its opening angle which, from its free transverse edge, increases progressively, for example from a value of 60°, until it is equal to said constant value of the angle of opening.
  • the dimensions of the support, in particular of the introduction part will advantageously be chosen taking into account the dimensions of the spoon of the chamber in which the projectile must be placed, so that during the movement of the part introduction inside the chamber, the introduction part can come into contact, by its sides, on the edges of the spoon.
  • the support is coated, at least on the support zones, if necessary on the entire plate forming the support, with an anti-friction coating, preferably of the chemical-nickel or PTFE-filled chemical-nickel type.
  • the support can be made of a metal alloy or a composite material.
  • the at least one thrust member may be a pusher comprising a bearing surface intended to correspond with a rear face of the projectile.
  • a positioning device 1 comprises a discharge impeller 2, used to project a projectile P, shown in dotted lines, into a chamber 101 of a tube 100 until his positioning position, and a support 3 serving to guide the introduction of the projectile P into the tube 100 in a way making it possible to limit any oscillations of the projectile P.
  • the discharge impeller 2 is a conventional impeller, for example of the type described in the patent FR3043190 B1 .
  • the impeller 2 thus comprises in a known manner a frame 20 in which is defined a reception space 21 extending along an axis A1 of the frame 20 and leading to an opening 22, called a discharge opening, at a first end 20a, also called discharge, the frame 20.
  • the frame 20 also includes an opening 23, called introduction, through which a projectile P can be introduced into the receiving space 21, this introduction opening being here on top. It could also be provided that the insertion opening, used to introduce the projectile P into the impeller 2, either the discharge opening 22 or is provided at another location of the frame 20.
  • the impeller 2 also comprises a thrust member 24 movable in translation along the axis A1 alternately between an initial position, illustrated on the Figure 1 and where the thrust member 24 is located on the rear side of the chassis, and a final position illustrated on the Figure 2 and 4 , where the thrust member 24 has been moved to the vicinity of the discharge end 20a, as is well known.
  • the thrust member 24 will be guided and moved by any appropriate means, and one can for example refer again to the patent FR3043190 B1 .
  • the displacement of the thrust member 24 from the initial position to the final position will be defined so as to obtain a projection of the projectile P. This displacement will present thus a strong acceleration from the initial position and a strong deceleration when approaching the final position.
  • the thrust member 24 is here formed by a pusher 25 having a bearing face 25a which will come into contact with the rear face of the projectile P in order to push the latter.
  • the present invention is not limited to a specific type, number, guidance and drive of the thrust member 24.
  • the positioning device 1 is distinguished in that the impeller 2 is provided with a support 3 which is integral with the thrust member 24 and intended to receive the projectile P before discharge, the support 3 also being intended to partly penetrate into the tube 100 with the projectile P during the discharge of the latter, while the thrust member 24 remains outside the tube 100.
  • the support 3 is thus constructed and dimensioned so as to be able to support the weight of the projectile P and to be partially introduced into the tube 100 during discharge, in the gap present between the body of the projectile and the interior wall of the chamber 101
  • the dimensions of the projectile P and of the tube 100 will be taken into account, and in particular the external diameter of the body of the projectile P and the internal diameter(s) and lengths of the various internal walls of the tube 100.
  • the support 3 is formed by a simple curved plate 30 in the form of a bucket following an arc of a cylinder of revolution whose axis is the axis A1 of the frame 20.
  • the plate 30 has thus a concave inner face 30a, the concavity of which is here facing the introduction opening 23, on which the projectile P will be placed, and a convex outer face 30b, the convexity of which is facing away from said opening of introduction 23.
  • the concavity of the inner face 30a will face up and the convexity of the outer face 30b will face down.
  • the radius of the inner face 30a may only be slightly greater than the outer radius of the body of the projectile P.
  • the radius of the outer face 30b may not be only slightly less than the inside radius of the weapon chamber entrance 100.
  • chassis axis means the straight line which will be aligned with the longitudinal axis of the projectile P supported by the support 3 and which during the repression operation is also aligned with the longitudinal axis A2 of the tube 100. It would therefore be possible to provide a frame whose geometric axis is not aligned with the axis A2 during the discharge, without thereby departing from the scope of the present invention.
  • the plate 30 comprises an insertion part 31 and a connecting part 32.
  • the insertion part 31 is that which enters the tube 100 when the pusher 25 is in the final position, as can best be seen in the Figure 4
  • the connecting part 32 is that which does not penetrate into the tube 100 and by means of which the support 3 is secured to the pusher 25.
  • the attachment of the support 3 to the pusher 25 can be ensured by any appropriate means, such as for example by welding the outer face 30b to a semi-cylindrical bearing surface 25b of the pusher 25 provided for this purpose.
  • the plate 30 is here semi-cylindrical over three quarters of its length from its transverse edge fixed to the pusher 25, and which constitutes the rear end of the support 3, then its opening angle ⁇ gradually decreases, from a value of 180° in the semi-cylindrical part, to the transverse edge 30a of the plate, where the opening angle is for example 60° .
  • each longitudinal edge of the plate 30 comprises a rectilinear segment 30d which is at the height of the axis A1 and a rectilinear segment 30e inclined.
  • the support 3 In the initial position of the thrust member 24, illustrated in the Figure 1 , the support 3 is located in the reception space 21 and is ready to receive the projectile P, which is deposited on the support 3 manually or by appropriate handling means, which are well known and will therefore not be described in detail. .
  • Positioning device 1 is then moved, again by any well-known suitable means, so that discharge opening 22 is aligned with inlet 102 of tube 100.
  • the thrust member 24 can then be moved to the final position, illustrated on the Figure 2 and 4 , so as to drive back the projectile P by projecting it into the tube 100 to its posting position.
  • the plate 30 penetrates with the projectile P into the tube 100, passing through the gap present between the body of the projectile P and the interior walls of the tube 100.
  • the support 3 will constitute an obstacle preventing the projectile P from tilting towards the lower part of the tube 100 when the projectile P enters the latter, and will therefore limit the amplitude of any oscillation of the projectile. p.
  • tube 100 has a scoop 103.
  • scoop 103 is formed by a recess in the inner wall of tube 100, immediately after inlet 102, so that the entrance 101 has a low cylindrical surface 104 forming a rim 105 intended to retain the propellant charges.
  • the support 3 allows the projectile P to behave during the discharge as if the spoon 103 were not present.
  • the support 3 When the support 3 enters the tube 100, it will come to rest both on the lower bearing surface 104 and on the two longitudinal edges 106 of the spoon 103, at the level of two lateral zones of the support 3 circled in dotted lines on the Figure 2 , which in the present embodiment correspond to the zones where the opening angle ⁇ of the plate 30 decreases.
  • the support of the two lateral support zones of the support 3 will take place on the conical generatrices of the chamber 101, so that the support 3 will be centered naturally and gradually. in room 101.
  • the plate 30 may advantageously be coated, on its inner 30a and outer 30b faces, with an anti-friction coating, preferably of the chemical-nickel type or nickel-chemical filled PTFE.
  • the support 3 will also be dimensioned, according to the dimensions of the tube 100, so that a clearance d1 is present between the front end 30c of the support 3 and tube 100, play measured in the transverse plane to the axis A2 of the tube 100 and passing through the front end 30c, when the thrust member 24, and therefore the support 3, is in the final position.
  • the clearance d1 will preferably be at least 1.5 mm.
  • the present invention makes it possible to greatly limit any oscillations of the projectile during its discharge, even in the presence of a spoon in the chamber, and therefore to considerably improve the reliability of the discharge device, for a posting successful the first time.
  • the solution according to the present invention is moreover particularly simple to implement and inexpensive.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
EP22179317.7A 2021-06-15 2022-06-15 Vorrichtung zur positionierung eines geschosses Pending EP4105591A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2106252A FR3123977B1 (fr) 2021-06-15 2021-06-15 Dispositif de mise a poste d'un projectile

Publications (1)

Publication Number Publication Date
EP4105591A1 true EP4105591A1 (de) 2022-12-21

Family

ID=77999047

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22179317.7A Pending EP4105591A1 (de) 2021-06-15 2022-06-15 Vorrichtung zur positionierung eines geschosses

Country Status (2)

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EP (1) EP4105591A1 (de)
FR (1) FR3123977B1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1102023A2 (de) * 1999-11-17 2001-05-23 Krauss-Maffei Wegmann GmbH & Co. KG Geschossansetzer für Artillerie
FR3043190A1 (fr) * 2015-10-29 2017-05-05 Nexter Systems Refouloir a obus
US20200326146A1 (en) 2017-04-06 2020-10-15 Krauss-Maffei Wegmann Gmbh & Co. Kg Device for loading a barreled weapon with ammunition bodies

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1102023A2 (de) * 1999-11-17 2001-05-23 Krauss-Maffei Wegmann GmbH & Co. KG Geschossansetzer für Artillerie
FR3043190A1 (fr) * 2015-10-29 2017-05-05 Nexter Systems Refouloir a obus
FR3043190B1 (fr) 2015-10-29 2018-03-09 Nexter Systems Refouloir a obus
US20200326146A1 (en) 2017-04-06 2020-10-15 Krauss-Maffei Wegmann Gmbh & Co. Kg Device for loading a barreled weapon with ammunition bodies

Also Published As

Publication number Publication date
FR3123977B1 (fr) 2024-02-23
FR3123977A1 (fr) 2022-12-16

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