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
  • F41A23/00—Gun mountings, e.g. on vehicles; Disposition of guns on vehicles
  • F41A23/34—Gun mountings, e.g. on vehicles; Disposition of guns on vehicles on wheeled or endless-track vehicles

Definitions

• the technical field of the invention is that of devices for fixing a weapon system on a vehicle chassis.
• Self-propelled weapons systems are usually attached to a turret that is attached to an armored chassis.
• the mechanical characteristics of the turret and the frame are defined so as to ensure the resistance of these different elements to the shooting constraints.
• Patent FR-2663727 also discloses a device for mounting a mortar on a truck. This device proposes to fix the mortar on a firing plate itself linked to the false frame by an elastic connection means.
• the false frame also carries a stabilizer that bears on the ground.
• EP-1231129 discloses a connecting means between a plate and a vehicle chassis, a connecting means which comprises four points: two pivot connections (arranged at the front and rear of the plateau at a central axis) and two simple supports arranged laterally on either side of the central axis and between the pivots.
• the object of the invention is to propose a connection device which, with a reduced mass, makes it possible to ensure the connection between a carrier vehicle chassis and a weapon system while minimizing the stresses to which the carrier chassis is subjected during firing.
• the subject of the invention is a device for attaching a weapon system to a vehicle chassis, a device comprising a false chassis carrying the weapon system and secured to the chassis by a connecting means, characterized in that that the connecting means comprises at least two attachment points, arranged between the frame and the subframe and distributed on the lateral faces of the frame and false frame on either side of the weapon system, attachment points formed of lugs integral with the chassis, lugs each carrying a rod, parallel to the lateral faces of the chassis and subframe, and on which is mounted a block secured to the subframe, block that can both translate and pivot relative to the rod, so compared to the chassis.
• the legs will be fixed on both sides of the frame on side faces of spars.
• the blocks may be fixed to the subframe by means of brackets integral side faces of side beams of the subframe.
• the blocks may be fixed to the brackets by securing means, spring means being interposed between the securing means and the brackets.
• the stiffness of the spring means will advantageously be different from one point of attachment to the other, the stiffness being defined according to the deformations that the point of attachment must undergo.
• the axis of the securing means may be remote from the pivot axis of the block.
• the device may include at least six pairs of attachment points.
• the device may comprise a positioning pin secured to the frame at a median plane thereof, pivot cooperating with a socket carried by the false frame.
• the positioning pin will preferably be disposed near the implantation of the weapon system on the subframe.
• the attachment points will advantageously be closer to each other in the vicinity of the implantation of the weapon system on the subframe.
• FIG. 1 schematically represents a weapon system linked to a carrier vehicle by a device according to the invention
• FIG. 2 is a side view of an embodiment of a point of attachment
• FIG. 3 is a cross-sectional view of the point of attachment, cut along the plane whose track AA is marked in FIG. 2;
• FIG. 4a is a diagrammatic plan view of the false frame intended to carry the weapon system
• FIG. 4b shows a schematic top view of the chassis of the carrier vehicle (chassis shown only),
• FIG. 4c shows a top view of the assembly of the subframe and chassis.
• a vehicle 1 carries a weapon system 2 which is here an artillery system including a large caliber gun (caliber greater than 90 mm).
• the vehicle 1 is a truck comprising a cabin 3 carried by a chassis 4. It comprises a ground connection comprising here (by way of non-limiting example) two axles 5 with wheels.
• the weapon system 2 comprises a tube 6 sliding in a sled 7, which is itself pivotally mounted on a carriage 8 by pins 9.
• the carriage is carried by a plate 12 or subframe.
• the tube 6 carries at its front end a muzzle brake 10.
• the weapon or artillery system 2 is shown here in an extremely simplified manner. It comprises of course and in a usual manner one or more hydraulic firing brakes (not shown) interposed between the recoil mass (tube 6 and brake 10) and the sled 7 and at least one recuperator (not shown) ensuring the back in battery after firing.
• a rear stabilizer 11 is articulated (articulation 11a) on the plate 12 (or on the carriage 8) behind the axis 13 of the rear axle.
• This stabilizer comprises at least one spade 14 integral with a telescopic arm.
• the stabilizer 11 ensures before firing a ground anchor of the rear of the vehicle 1, the ground anchor 16 is defined by the position of the spade. One or two arms and one or two spades may be provided. The stabilizer 11 is shown in the figure in the deployed position, the spade 14 anchored in the ground.
• the telescopic arm 15 can be shortened and the complete stabilizer can then tilt around the hinge 11a and rise.
• the false frame 12 is secured to the frame 4 of the vehicle by a connecting means which comprises a plurality of attachment points 17a, 17b, 17c, 17h disposed between the frame 4 and the subframe 12 and distributed over the side faces of the chassis and subframes on both sides of the artillery 2.
• Figure 1 is schematic and shows the false frame 12 disposed at a distance from the frame 4. In fact these two elements are in contact with each other. It can provide a damping means (such as rubber sheets) interposed between the subframe and the frame.
• FIGS 2 and 3 show in more detail the structure of an attachment point 17.
• the latter comprises a tab 18 which is fixed to the frame 4 by bolts (not shown) fixed through holes 19.
• the tab comprises two lateral flanges 31a and 31b carrying bores 21 and between which is disposed a cylindrical rod 20 axis 27.
• the rod is stopped in translation relative to the flanges 31a, 31b by conventional means not shown (for example transverse pins or nuts).
• the rod 20 receives a block 22 which is secured to the false frame 12 via a bracket 23.
• the axis of the rod 20 is parallel to the side faces of the frame and subframe, thus also parallel to the median planes 32 and 33 of the frame and the subframe (see Figures 4a and 4b).
• the bracket 23 comprises a sheet metal plate 30a which is welded to a side face of the subframe 12 and on which is welded a profile 30b reinforced by a rib 30c.
• the block 22 is fixed to the bracket 23 by fastening means which are here screws 24.
• fastening means which are here screws 24.
• One or more spring washers 25 are interposed between the head of the screws 24 and the profile 30b.
• the axis 28 of the screws is thus disposed at a distance D from the pivot axis 27 of the block (see FIG. 3). As far as possible, we will try to minimize this distance D so as to limit the stresses at the level of the connection between the bracket 23 and the subframe 12.
• washers 25 will be different from one attachment to another. As will be described later, the skilled person will calculate the mechanical stresses on each fastener 17 when firing and it will define the desired mechanical stiffness for each attachment point to minimize mechanical stress. If necessary, depending on the desired stiffness, the washers may be replaced by simple cylindrical spacers.
• the block 22 can both translate (directions T) and pivot (arrow R) relative to the geometric axis 27 of the rod 20.
• the subframe 12 is subjected to significant stresses that result in deformations of its structure.
• the warping (or twisting) of the subframe lead to a pivoting of the side edges of the subframe relative to the chassis. These warps are absorbed by the pivoting capacity R of each block 22 relative to its rod 20, so relative to the frame.
• the subframe 12 can therefore pivot relative to the chassis 4 at each attachment point 17.
• the invention thus provides each attachment point 17 of the subframe 12 with a translation and pivoting capacity relative to the chassis 4.
• the invention While ensuring a safe and light connection between chassis and subframe, the invention thus allows to absorb the deformations caused by the shot and thus to limit the stresses on the chassis 4 of the vehicle 1. This is particularly important when the chassis has a rigid structure that does not tolerate such deformations.
• Figures 4a and 4b respectively show in simplified top views, the subframe ( Figure 4a) and the frame ( Figure 4b).
• the frame 4 comprises two lateral spars 29a and 29b on which the different lugs 18 of the attachment points 17 are fixed.
• the spar 29a thus carries eight tabs 18a, 18b ... 18h in the figure and the spar 29b carries, in a symmetrical manner with respect to the vertical median plane 32, eight other legs also marked 18a, 18b ... 18h.
• the longitudinal members 29a and 29b are connected to each other by screwed or welded spacers 34, 34a.
• An intermediate spacer 34a also carries a cylindrical rod or pivot 35 perpendicular to the plane of the frame 4.
• the subframe 12 shown in Figure 4a is also realized in the form of a welded structure comprising side beams 36a and 3 ⁇ b connected in particular by at least one spacer 37 as well as by a plate 38 on which is fixed a ring 39 intended to receive the carriage 8.
• the rear portion of the subframe 12 also carries the hinges 11a for the stabilizer or stabilizers (not shown).
• the lateral beams 3 ⁇ a and 36b each carry eight brackets marked 23a, 23b ... 23h in the figure.
• the brackets carried on the beam 36b are arranged symmetrically to the brackets of the beam 36a with respect to the median vertical plane 33.
• the spacer 37 carries a cylindrical sleeve 40 which is intended to receive the rod 35 secured to the chassis 4.
• FIG. 4c shows the assembly of the subframe 12 on the chassis 4.
• the correct positioning of the false frame is facilitated by the cooperation of the rod 35 with the sleeve 40.
• the rod 35 and the sleeve 40 are positioned in the vicinity of the place where the shooting forces are applied. by the weapon system with the false frame, that is to say near the crown 39.
• the bushing / rod connection makes it possible to position the false frame relative to the chassis but also makes it possible to take back part of the firing forces transmitted from the subframe to the chassis, thus relieving the attachment points 17 during firing.
• each bracket 23 is above a lug 18.
• Each lug 18 carries a block 22.
• the assembly is completed by screwing the brackets 23 on the different blocks 22 so as to constitute the different points fastener 17 of the connecting means.
• each attachment point will size each attachment point and he will choose the number and distribution of the latter as a function of the characteristics of the weapon system and those of the carrier on which it is desired to install it. Positioning and sizing will be realized by numerical simulation of the firing constraints on the structure.
• the desired stiffness will be calculated at each attachment point 17 so as to minimize the stresses undergone. This stiffness calculation will define the washers or spacers 25 which will be implemented at each attachment point 17.
• the invention is particularly useful when the carrier vehicle provided is provided with a rigid chassis.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Body Structure For Vehicles (AREA)
• Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
• Air Bags (AREA)
• Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)

Priority Applications (7)

Applications Claiming Priority (2)

Publications (2)

Family

ID=36694190

Family Applications (1)

Country Status (11)

Families Citing this family (2)

Citations (5)

Family Cites Families (3)

• 2005
  • 2005-11-21 FR FR0511826A patent/FR2893710B1/fr not_active Expired - Fee Related
• 2006
  • 2006-11-13 ES ES06831109T patent/ES2361438T3/es active Active
  • 2006-11-13 EP EP06831109A patent/EP1960729B1/fr active Active
  • 2006-11-13 DE DE602006020171T patent/DE602006020171D1/de active Active
  • 2006-11-13 PL PL06831109T patent/PL1960729T3/pl unknown
  • 2006-11-13 DK DK06831109.1T patent/DK1960729T3/da active
  • 2006-11-13 JP JP2008540647A patent/JP4901875B2/ja active Active
  • 2006-11-13 AT AT06831109T patent/ATE498814T1/de not_active IP Right Cessation
  • 2006-11-13 WO PCT/FR2006/002509 patent/WO2007057550A1/fr active Application Filing
• 2008
  • 2008-05-21 ZA ZA200804372A patent/ZA200804372B/xx unknown
  • 2008-05-21 IL IL191606A patent/IL191606A/en active IP Right Grant

Patent Citations (5)

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