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
  • F41A23/02—Mountings without wheels
  • F41A23/16—Testing mounts

Definitions

• the present invention relates to equipment for installing a small caliber weapon on a test bench comprising U-shaped calipers provided with pressure screws to press against the weapon and lock it in the calipers.
• the aim of the present invention is to develop equipment for a test bench of the type defined above, so as to accelerate and simplify the positioning of the weapon in order to increase the yield and the reproducibility of tests carried out on the same weapon or weapons of the same type.
• the invention relates to equipment of the type defined above, characterized in that it comprises:
• the weapon thus prepared can be positioned precisely in the stirrups and thus in relation to the test bench.
• each cavity with a spherical bottom and the spherical head of the pressure screw cooperating with this cavity makes it possible to perfectly block and hold the weapon during the test shots.
• the shallow spherical bottom cavities do not constitute raised parts which interfere with the grip of the weapon.
• a weapon in the test bench is extremely fast if it is a serial weapon for which the prior adjustment of the test bench, i.e. the spacing and positioning U-shaped stirrups is identical, the location of the spherical bottom cavities produced in the weapons of the same series being, in principle identical.
• This placement of the weapon in the test bench avoids any other fixing (clamping) of the weapon, for example by a high fixing module which should be applied on the top of the weapon.
• the spherical bottom cavities and the pressure screws, or at least the spherical heads cooperating with the spherical cavities, are made of treated steel or titanium, so as not to show wear even after a relatively large number of shots of 'test because there must be no erosion or deformation by matting.
• the spherical bottom cavity is formed in an insert integrated into the weapon.
• This insert is advantageously constituted by two associated cylindrical sleeves forming two cavities with a spherical bottom, preferably symmetrical opposite with respect to the longitudinal plane of symmetry of the weapon and these two sleeves are assembled in a hole passing through the weapon. This drilling is carried out in a part of the weapon capable of being pierced, such as the stock or the hand rest.
• the two sleeves can be provided with complementary threads, one constituting a male threaded part, the other a female threaded part, to be assembled by screwing, possibly blocked by gluing.
• the outer edge of each sleeve has a slot making it possible to place a screwing tool.
• the two sleeves are provided, one with a cylindrical housing and the other, with a cylindrical pin intended to engage in the cylindrical housing when the two sleeves are assembled in a hole made in the weapon, these two sleeves being assembled by gluing.
• the two cylindrical sleeves are of stage diameter so as to form a shoulder on each side of the assembly formed by the two sleeves to allow the weapon to be clamped and to prevent the two sleeves from being able to disengage from the bore.
• the bore is obviously also of stepped form with two countersinks on each side to receive the part of large diameter.
• the spherical bottom cavity is machined in the weapon from its manufacture or after manufacture.
• Such a cavity can be made in any hard steel part of the weapon with the exception of the barrel.
• the equipment according to the invention makes it possible to increase the rate of installation or assembly / disassembly of the weapon on the test bench since it is very easy to clamp. It guarantees the reproduction of the clamping coordinates of the weapon and avoids the use of accessory parts, in particular a butt plate stopper.
• Another major advantage of the inserts in association with the test bench is that the operator carrying out the tests does not need to repoint the test bench on the target after the change of a weapon by another of the same model since the reference position in the space thereof is identical.
• the present invention makes it possible to increase the safety of operators on ballistic test benches, because even if the pressure screws are not correctly tightened, the weapon is sufficiently trapped in the stirrups not to change abruptly in direction and thus guarantees the point approximate fall of the projectile.
• the approach hole for the inserts can be slightly tapered in order to allow robotic gripping allowing greater tolerance at the approach coordinates of the clamping axes, in particular pneumatic.
• the external shape of an insert is more or less free because the dimensional characteristics and shape configurations of the weapons are never the same from one brand to another.
• FIG. 1A is a sectional view of a stock fitted with an insert with two spherical bottom cavities according to the invention
• FIG. 1B is a side view of the stock fitted with the insert
• FIG. 2A is a section through a hand rest fitted with an insert according to the invention
• FIG. 2B is a side view of the hand rest of Figure 2A
• - Figure 3A is a stirrup view showing the spherical end of two pressure screws intended to receive a weapon provided with symmetrical spherical cavities
• FIG. 3B shows the installation of an insert between the two symmetrical pressure screws, diagramming the installation of a weapon in the caliper
• FIG. 4 A is a view in axial section of a female part d 'an in serves according to the invention
• FIG. 4B is a front view of the insert part of FIG. 4A
• FIG. 5A is a partial section view of the second part or male part of the insert according to the invention
• FIG. 5B is a front view of the part of the insert of FIG. 5A
• FIG. 6 is a view of a pressure screw without its wheel
• FIG. 7 is a view of a pressure screw with a nut wheel and a lock nut locking wheel.
• the invention relates to equipment for installing and testing a small caliber weapon on a test bench.
• This test bench is not shown. It consists of a base part or mount attached to a natural support such as a tree trunk, a column or on the barrel of a shooting cabin by straps or other removable fixing means.
• This test bench preferably transportable, includes means making it possible to mount (clamp) a weapon for carrying out tests then to dismantle it.
• These means intended for a small caliber weapon, long or hip weapon, consist of two U-shaped stirrups constituting in a way the vice receiving the weapon on the lookout. These stirrups are fitted with pressure screws to lean against the weapon and lock it in the stirrups.
• the test bench includes a shock absorber to absorb the recoil of the weapon when fired.
• the invention relates to equipment for such a test bench.
• This equipment consists of a set of spherical bottom cavities equipping the weapon to be tested and a set of pressure screws with head spherical carried by the stirrups and coming to be housed in the spherical bottom cavities made in or on the weapon to be tested.
• FIG. 1A shows, by way of example, a stock 1 of a rifle, equipped with an insert 2.
• This insert is housed in a bore 3, stage made in the stock 1, and directed perpendicular to the plane of symmetry at median plane MM ( Figure 1A).
• the insert is double and has two cavities 21-1, 22-1 with a spherical bottom in which will be housed the spherical heads of two pressure screws VP shown here by arrows directed in the axis XX of l insert.
• the insert is a simple piece provided with a single spherical cavity. This insert can also be replaced by a cavity of corresponding shape machined in a metal part of the weapon and allowing such machining.
• the drilling stage 3 consists of a central part 31 of small diameter bordered, on each side, of a part 32, 33 of enlarged diameter, in the form of countersink, opening into the faces 11, 12 of the butt 1.
• L insert 2 is itself formed by two parts 21, 22, one female, the other male. The female part is shown in Figures 4A, 4B; the male part, in FIGS. 5A, 5B.
• the first part 21 of the insert 2 is a generally cylindrical part, formed of a body 21-2 of diameter corresponding to that of the small diameter 31 and of a head 21-3 of enlarged diameter forming a shoulder 21-4 with the body 21-2.
• the head 21-3 has a diameter corresponding to that of the bore 32 and the height of the head 21-3 corresponds to the depth of the bore 32.
• the head 21-3 comprises a spherical housing 21-1, or more exactly, a hemispherical housing, pressed into the head 21-3 beyond the diametrical plane of this hemispherical shape and extending forwards by a circular cylindrical part .
• the head is provided with a double slot 21-6 to receive a screwing tool.
• the body 21-1 of the part 21 is provided with a thread 21-7 to be assembled with the threaded part of the second part 22.
• This second part 22 (FIGS. 5A-5B) consists of a cylindrical body 22-2 with a diameter equal to that of the bore 31 extends giant forward by a threaded part 22-7 of diameter and thread corresponding to the thread of the housing 21-7 of the first part 21.
• the body 22-2 is extended by a head 22-3 of enlarged diameter forming, as for the part 21, a shoulder 22-4.
• the head 22-3 has a diameter corresponding to that of the bore 33 equal to that of the bore 32.
• the height of the head 22-3 is substantially equal to the depth of the bore 33 so that its front face 22-5 does not protrude from the lateral face 1 1 of the stick 1. At the front face, the flange remaining from the head
• the spherical housing 22-1 is, in fact, a hemispherical housing whose diametral plane is recessed with respect to the front face 22-5 and extends to this face by a cylindrical part of circular section.
• the assembly of the two parts 21, 22 is done by screwing as shown in Figure 1A. But it is also possible to produce, in the part 21, not a tapping 21-7 but a simple non-threaded drilling and to extend the part 22 of a non-threaded rod 22-7 with a diameter corresponding to that of the drilling 21- 7.
• the assembly of the two parts 21, 22 in the drilling of the butt 1 is made by gluing the two parts to one another.
• FIG. 6 shows the shape of a pressure screw 4 intended to clamp a weapon at the level of the parts 21, 22 of the insert 2.
• This screw 4 consists of a threaded rod 41 ending, at the front, by a conical shaped transition surface 42 provided with a spherical head 43 with a flange 44.
• the screw 41 is provided with a thread 45 for receiving the threaded end of a thumbwheel.
• the threaded part 41 can also receive a lock nut closed by a notched wheel.
• Such pressure screws 4 are housed in the stirrup 6 as shown in FIG. 3A and protrude from the inside of the latter so as to hang in the spherical cavity of an insert, like the insert
• this insert 2 is integrated in a part of the weapon as, for example, the butt 1 of FIGS. 1A or 1B. But to facilitate understanding, the weapon is not shown.
• the tightening is done by acting on the pressure screws 4.
• the transverse tightening of the weapon is done in each stirrup using the ball screws 4 tightened in the spherical housings of the weapon.
• the tightening is completed by a 4A screw of the same type but whose spherical head receives a shoe articulated on the head and coming to rest against the underside of the weapon.
• the skate is not shown in Figures 3A, 3B. It is also possible to provide at the location of the support of this screw 4 A, a housing with a spherical cavity and in this case the screw will not have a support pad.
• the locking device allows excellent clamping with only three screws because when the lower pressure screw of the caliper "U" is under pressure, it compensates for the residual play on the two upper pressure screws.
• a pressure screw 4 is shown by way of example in FIG. 7. It shows the various parts already described with the aid of FIG. 6 with in addition the wheel 46 and the castle nut 47.
• Figures 2A, 2B show the integration of an insert 2 in a hand rest 5 of a rifle.
• This hand rest not detailed, is provided with a stage drilling like that made in the butt 1 to receive the insert either screwed as shown in Figure 2A or simply fitted and glued.
• the screwed insert is preferably also glued with an adhesive of the thread-locking type allowing non-permanent mounting to prevent shocks and vibrations from unscrewing the two parts 21, 22 relative to one another. to the other the insert can be welded or crimped.
• the insert can also be a form machined in a metallic part of the weapon with the exception of the barrel.
• the inserts or the spherical cavities produced directly in the mass are preferably provided in two places of the weapon, at the front and at the rear.
• the spherical cavity is produced by stamping.
• the orifice of the insert corresponds to a hole with a diameter of 8 millimeters and a depth of 7 millimeters.
• These cavities can, as indicated, either be machined directly in the weapon or consist of an insert 2.
• this is made of high-strength steel or titanium. By surface treatment, this part is burnished or phosphorized.
• the pressure screws are also made of steel. These are also treated on the surface by burnishing or by phosphoration.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Clamps And Clips (AREA)
• Connection Of Plates (AREA)

Applications Claiming Priority (3)

Publications (1)

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ID=32116574

Family Applications (1)

Country Status (5)

Families Citing this family (2)

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• 2002
  • 2002-11-13 FR FR0214169A patent/FR2847032B1/fr not_active Expired - Fee Related
• 2003
  • 2003-11-10 AU AU2003295012A patent/AU2003295012A1/en not_active Abandoned
  • 2003-11-10 WO PCT/FR2003/003342 patent/WO2004046634A1/fr not_active Ceased
  • 2003-11-10 EP EP03786004A patent/EP1567822A1/de not_active Withdrawn
  • 2003-11-12 US US10/706,342 patent/US6973749B2/en not_active Expired - Fee Related

Non-Patent Citations (1)

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