Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F41—WEAPONS
  • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
  • F41H7/00—Armoured or armed vehicles
  • F41H7/02—Land vehicles with enclosing armour, e.g. tanks
  • F41H7/03—Air-pressurised compartments for crew; Means for preventing admission of noxious substances, e.g. combustion gas from gun barrels, in crew compartments; Sealing arrangements
• • 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
  • F41A15/00—Cartridge extractors, i.e. devices for pulling cartridges or cartridge cases at least partially out of the cartridge chamber; Cartridge ejectors, i.e. devices for throwing the extracted cartridges or cartridge cases free of the gun
• • 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
  • F41A9/54—Cartridge guides, stops or positioners, e.g. for cartridge extraction
• • 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
  • F41A35/00—Accessories or details not otherwise provided for
  • F41A35/02—Dust- or weather-protection caps or covers
• • 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
  • F41A9/60—Empty-cartridge-case or belt-link collectors or catchers
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F41—WEAPONS
  • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
  • F41H5/00—Armour; Armour plates
  • F41H5/20—Turrets

Definitions

• the technical field of the invention is that of the lids intended to close off a duct ejection duct of a turret as well as a duct ejection duct and turret comprising a duct ejection duct. than turrets equipped with such lids.
• EP1468240 discloses a turret having an ejection port of the sockets of a weapon.
• the orifice is closed by a diaphragm or cap which comprises lips which deviate during the passage of the sleeves and which become contiguous after the passage of the sleeve.
• the lid has a bowl profile with a substantially flat bottom.
• the turret is overpressurized with respect to the outside, in order to ensure a seal and a protection when the vehicle moves in an environment contaminated by nuclear, bacteriological or chemical pollutants.
• Such a cap is dimensioned so as to remain closed despite the overpressure in the turret. This results in a stiffness of the seal which hinders the ejection of the sockets.
• the invention also relates to a turret equipped with at least one such cap.
• the subject of the invention is a cover intended to close off a duct ejection duct of a turret, which seal comprises a circular base intended to allow its attachment at the level of the duct and a shell having a spherical cap profile having a concave face and a convex face, the hull being cut into at least four sectors by slots regularly distributed angularly, the sectors being joined two by two.
• the shell may comprise a thinned zone in the vicinity of its axial portion.
• This thinned zone may result from the presence of a flat part.
• the thinned zone may result from the presence of a different radius of curvature between a peripheral portion and a median portion at the concave face and / or the convex face of the shell.
• the shell may comprise a circular zone of decrease in thickness which is located in the vicinity of the base of the sectors.
• the shell may have a substantially hemispherical shape.
• each slot may be inclined with respect to a diametral plane, the inclination being variable between the base of the slot and its end close to the axis of the lid, the slot being oriented diametrically in the vicinity the axis of the lid to ensure the contact of the different sectors at this level, the inclination of the slots ensuring a partial recovery of the joined sectors.
• the lid will advantageously be made of rubber.
• the subject of the invention is also a turret comprising a duct evacuation duct between an inner zone of the turret and the outside, turret characterized in that the duct carries at least one lid according to the invention, a lid which is traversed by the sockets during their ejection.
• the turret may include a lid which is oriented with its convex face towards the inner zone.
• the turret may include a cap which is oriented with its convex face outwardly.
• FIGS. 1a and 1b are two views of a first embodiment of a lid according to the invention, FIG. 1a being a longitudinal sectional view along the plane AA whose trace is marked in FIG. 1b, and FIG. Figure lb being a front view;
• FIGS. 2a and 2b are two views of a second embodiment of a cap according to the invention, FIG. 2a being a view in longitudinal section along the plane BB whose trace is marked in FIG. 2b, and FIG. Figure 2b is a front view;
• FIG. 3 is a longitudinal sectional view of a lid according to a third embodiment
• FIG. 4 is a longitudinal sectional view of a lid according to a fourth embodiment
• FIG. 5 is a schematic view of a duct evacuation duct of a turret according to the invention, a sleeve being positioned in front of the lid;
• FIG. 6 is a diagrammatic view of the same duct in which a bushing passes through the cover according to the invention.
• FIGS. 7a and 7b are two views of a fifth embodiment of a lid according to the invention, FIG. 7a being a longitudinal sectional view along the plane CC whose trace is marked in FIG. 7b, and FIG. Figure 7b is a front view;
• FIG. 8 is a perspective view of the lid according to this fifth embodiment
• FIG. 9 is a section of the cap following the plane whose trace DD is marked in FIG. 7a;
• FIG. 10 is a schematic view of a duct exhaust duct of a turret according to another embodiment of the invention, a sleeve being positioned in front of the lid;
• FIG. 11 is a schematic view of the same conduit in which a sleeve passes through the cap;
• FIG. 12a to 12d show in longitudinal section different variants of a lid according to the invention.
• a cover 1 according to a first embodiment of the invention comprises a circular base 2 and a shell 3 which has a concave face 3a and a convex face 3b.
• the shell 3 has a spherical cap profile and more particularly here a substantially hemispherical cap shape.
• the shutter 1 is intended to be fixed at a duct 4 ejection duct 5 of a turret 6.
• the turret is not shown in detail, Figure 5 showing only part of the duct 4.
• the exhaust duct 4 makes it possible to drive the bushings 5 from an internal zone (INT) to the turret to the outside (EXT).
• INT internal zone
• EXT outside
• An unrepresented weapon system is disposed on the inner side INT and pushes the sockets 5 into the duct 4.
• the sockets 5 are ejected in the direction D parallel to the axis 7 of the duct 4.
• the circular base 2 of the cover 1 is applied against a shoulder 8 surrounding the duct 4 and is immobilized by a nut 9 screwed into a tapping 10.
• This method of fixing the lid 1 on the duct 4 is given by way of example.
• Other fixing methods would of course be possible, for example a series of perforations made in the circular base 2, and which will be positioned opposite threads formed in the shoulder 8.
• the shell 3 is cut into at least four sectors 11 (here four sectors 11) by diametrical slots 12 (here two slots) which are regularly distributed angularly, the sectors 11 being joined two by two.
• the cover 1 is made of a flexible material such as rubber.
• the natural elasticity of the material ensures that the cap 1 is held in a closed position as can be seen in FIGS. 1a and 1b.
• the shape of the shell with a spherical profile ensures a return to the closed position of the lid after its deformation by a sleeve, so a good seal while not penalizing the capacity of deformation. In the closed position according to Figures 1a, 1b, the sealing of the conduit 4 is ensured.
• the sleeve 5 which is driven by an ejection speed of the order of several meters per second, comes to exert an effort at the level of the top of the convex portion 3b of the lid 3. It causes the folds of the sectors 11 towards the inside of the concave portion 3a. The sleeve 5 can then pass through the lid 3 and it is ejected outward EXT of the turret 6.
• the elasticity of the cover 1 associated with the spherical shape leads to the return of the sectors 11 to their initial position ( Figure la) after the passage of the sleeve 5.
• the sealing is ensured after the passage of the sleeve 5.
• the sector stiffness 11 can be adjusted, for example by changing the number of sectors. For example, it will be possible to provide three diametrical slots 12 which will delimit six sectors.
• the stiffness of the sectors 11 and the quality of the seal are also related to the thickness of the cover 1. It will be possible to choose a rubber cover 1 having a thickness of the order of 3 to 5 millimeters for an external diameter of the operculum of the order of 80 to 100 millimeters.
• Figures 2a and 2b show a second embodiment of a lid 1 according to the invention.
• This cover differs from the previous one in that a flat 14 is arranged at the top of the convex portion 3b of the shell 3.
• the position of this flat is defined by the angle of latitude ⁇ with respect to the spherical convex profile 3b of the hull 3.
• the latitude ⁇ at which the flat 14 is located is of the order of 70 ° which ensures a minimum thickness of 1 millimeter at the top of the shell 3 for a shell having about 4 mm thick.
• the thickness of the sectors 11 is gradually reduced between the beginning of the flat (latitude 70 °) and the center C of the flat (90 ° latitude).
• the sectors 11 have a tip end of reduced thickness, which also reduces the friction exerted on the sleeve 5 during ejection.
• FIG. 3 thus shows a third embodiment of the cover 1 in which the outer hemispherical profile 3b comprises a peripheral portion 3b1, whose center 0 coincides with that of the concave portion 3a, and a median portion 3b2 whose radius curvature is greater than that of the peripheral portion 3bl.
• This results in a thickness of the shell 3 which is constant in the part 3bl and which is variable in the part 3b2.
• the middle part 3b2 begins at a latitude ⁇ of about 60 °. This embodiment makes it possible to obtain a more gradual decrease in the thickness of the sectors 11 than that which is obtained with the flat part. Alternatively, it is possible to arrange a median portion with a smaller radius of curvature at the concave portion 3a. Such an arrangement reduces the thickness of the shell 3 from the inside.
• FIG. 4 shows a fourth embodiment of the invention in which the lid 1 comprises at its shell 3 a thickness reduction zone 15 made on the concave surface 3a, at the plane of the circle 13 passing through the ends of the slots 12, therefore in the vicinity of the base of the sectors 11.
• Such an arrangement facilitates a strong folding of sectors 11 at their base.
• This reduction in thickness is in the form of a circular notch with a V or U profile. It is produced at the level of the concave surface 3 a. Alternatively this circular notch could be made at the convex surface 3b.
• This reduction in the thickness of the base of the sectors 11 may be combined with a decrease in thickness of the ends of the sectors, made by a flat (as shown in FIG. 4) or by a spherical portion having a stronger radius of curvature at level of a medial portion of the convex face (as shown in Figure 3) or a lower radius of curvature at a middle portion of the concave face.
• FIG. 5 shows a mounting of the lid with its convex portion 3b oriented towards the inside INT of the turret. It would be possible to adopt a reverse mounting of the lid, that is to say with the convex portion 3b outward facing EXT of the turret. Even with such a montage inverted, the shape of the shell with a spherical profile ensures a return to the closed position of the lid after deformation by a sleeve, so a good seal. Such a variant however has the disadvantage that the pressure in the turret has the effect of pushing the sectors in the direction of their opening. It is then necessary to provide a lid having a greater thickness to stiffen the sectors and limit pressure leaks. This will, however, result in an increase in the friction force of the bushings on the sectors of one operculum.
• Figures 7a, 7b and 8 show a cap according to a fifth embodiment, a cap which is more particularly designed to be mounted on a turret with its convex portion 3b outward facing EXT of the turret.
• the cover 1 comprises a circular base 2 intended to allow its attachment to the duct and a shell 3 having a spherical cap profile having a concave face and a convex face.
• the cap 3 is not hemispherical but extends over an angle of about 120 °.
• the cap has a reinforced thickness to ensure as specified above a stiffening of the sectors 11 and thus limit pressure leakage.
• the shell 3 is still divided into four sectors by slots 12 regularly distributed angularly, the sectors 11 being joined in pairs.
• This embodiment differs from the previous ones in that the slots 12 are not made in diametral planes of the cover 1 but each slot 12 is inclined with respect to a diametral plane.
• FIG. 7b shows by the solid lines 12a the outer edge of the slots 12 as visible at of the convex face 3b of the operculum.
• Dotted line 12b shows the internal edge of the slots as it is visible at the concave face 3a of the lid 3.
• the dashed line 12c represents the foot of each slot 12 which extends between the concave face 3a and the convex face 3b. It is thus seen that the foot (or the base) of each slot 12 is inclined at an angle ⁇ relative to a diametral plane (materialized by the trace 12a of an outer edge of each slot).
• this inclination gradually decreases between the base 12c of the slot and its end close to the center C of the cover 1 (center placed at the axis 16 of the cover).
• the slot 12 is in fact oriented diametrically in the vicinity of the center C of the lid to ensure the contact of the different sectors 11 at this level.
• the axis 16 is an area of the cover 1 at which all the sectors 11 are joined.
• Figure 9 is a section of the lid 1 along the plane whose DD trace is located in Figure 7a.
• This FIG. 9 makes it possible to visualize an intermediate inclination of the different slots 12. It makes it possible above all to see that the inclination of the slots 12 makes it possible to ensure a partial overlap and two by two of the contiguous sectors 11.
• Such an arrangement improves the watertightness of the cover 1 when it is arranged with its convexity facing outwards. Indeed, the overpressure inside the turret has an effect favoring the opening of the sectors 11.
• each sector thus has profiles 11a bevel that apply to the neighboring sector and provide a seal to gases.
• Slots 12 with variable inclination will be made by laser cutting on an unslotted cover. The variation of the inclination of the slot will result from a variation of the inclination of the laser head associated with its movement in advance along the axis 16 of the lid.
• Figures 10 and 11 show the mounting of such a cap 1 at a duct 4 ejection duct 5 of a turret 6.
• the turret is not shown in detail, Figure 10 showing only part of the duct 4.
• the exhaust duct 4 allows driving the bushings
• the weapon system (not shown) is again disposed INT inner side and it pushes the sleeves 5 in the conduit 4.
• the sockets 5 are ejected in the direction D parallel to the axis 7 of the duct 4.
• the circular base 2 of the cover 1 is again applied against a shoulder 8 surrounding the conduit 4 and is immobilized by a nut 9 screwed into a tapping 10.
• Alternative modes of attachment are possible, such as that described previously in commentary to FIG. Figure 5.
• the seal 1 is made of a flexible material such as rubber.
• the sleeve 5 which is driven by an ejection speed of the order of several meters per second, exerts a force inside the concave portion 3a of the lid 3. She spreads the sectors 11 outward. The sleeve 5 can then pass through the lid 3 and it is ejected outward EXT of the turret 6.
• the slots 12 which delimit the sectors 11 have a length sufficient to allow the passage of the sleeve 5.
• the diameter ⁇ of the circle 13b (FIG. 7b), which is the trace of the plane perpendicular to the axis 16 of the cover and passing through the ends of the slots 12, to be greater than the diameter of the bushing 5.
• the diameter ⁇ will advantageously be about 70% greater than the diameter of the bushing.
• the stiffness of the sectors 11 can be adjusted by changing the number of sectors. For example, it will be possible to provide three diametrical slots 12 which will delimit six sectors.
• caps similar to those shown in Figures la, lb, 2a, 2b, 3 or 4 but for which the shell is not formed by a hemispherical cap but a simple spherical cap.
• Such an arrangement makes it possible to produce lids whose axial size is reduced.
• FIGS. 12a to 12d show different variants.
• Figure 12a is similar to Figure la but with a non-hemispherical operculum.
• Figure 12b is similar to Figure 2a with a non-hemispherical operculum.
• Figure 12c is similar to Figure 4 with a non-hemispherical operculum.
• Figure 12d is similar to Figure 3 with a non-hemispherical operculum.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Closures For Containers (AREA)
• Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
• Gasket Seals (AREA)
• Respiratory Apparatuses And Protective Means (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=59253568

Family Applications (1)

Country Status (4)

Families Citing this family (1)

Family Cites Families (39)

• 2017
  • 2017-02-02 FR FR1700122A patent/FR3062474B1/fr active Active
• 2018
  • 2018-01-26 EP EP18707076.8A patent/EP3577412B1/de active Active
  • 2018-01-26 WO PCT/FR2018/050181 patent/WO2018142047A1/fr not_active Ceased
  • 2018-01-26 US US16/483,151 patent/US11156417B2/en active Active

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