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
  • F41A5/00—Mechanisms or systems operated by propellant charge energy for automatically opening the lock
  • F41A5/18—Mechanisms or systems operated by propellant charge energy for automatically opening the lock gas-operated
  • F41A5/26—Arrangements or systems for bleeding the gas from the barrel
  • F41A5/28—Adjustable systems
• • 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
  • F41A5/00—Mechanisms or systems operated by propellant charge energy for automatically opening the lock
  • F41A5/18—Mechanisms or systems operated by propellant charge energy for automatically opening the lock gas-operated
  • F41A5/26—Arrangements or systems for bleeding the gas from the barrel

Definitions

• the invention relates to a gas take-off assembly for a barrel of a gas-pressure self-loading weapon (e.g., a machine gun) having a gas cylinder communicating with the barrel bore and having a first gas exit port cooperating with a throttle element.
• a gas take-off device is known, for example, from DE 196 15 181.
• barrel denotes both a gun barrel with moves and fields as well as a smooth gun barrel.
• Directional indications such as top, bottom, front, back, right and left are given for an attacking weapon from the point of view of the shooter.
• a gas piston is arranged in a gas cylinder.
• the gas cylinder is largely closed at one end, so that between the gas piston end face and the end wall of the gas cylinder, a pressure chamber is formed, which is in communicating communication with the interior of the barrel.
• the incoming gases build up a working pressure in the pressure chamber, which acts on the end face of the working piston.
• the resulting force acts via the power piston on a drive linkage, which is part of the loading mechanism in the weapon, and the cartridge feed and removal causes the closure movement, and possibly the tensioning of the trigger mechanism.
• the pressure chamber is provided with a gas outlet opening for pressure adjustment and - vote.
• the gas entering the gas cylinder from the barrel partly exits the gas cylinder or the pressure chamber into the environment, so that a lower pressure acts in the pressure chamber compared to the barrel.
• Such an embodiment is also known from DE 196 15 181.
• the gas quantity entering the pressure chamber from the barrel can be regulated via an adjustable valve (DE 648 391). With these measures, the flow and pressure conditions in the gas take-off arrangement can be matched to the weapon.
• a barrel change is not a problem in itself, the barrel is intended, but undesirable under conditions of use. Therefore, there is basically the problem with automatic weapons to keep the weft cadence as stable as possible, even in case of permanent use, in order to keep the weapon load low, to stabilize the ammunition consumption and to keep the intervals between necessary running changes as long as possible.
• a gas supply mechanism which has a spring-loaded control valve which is intended to allow a portion of the originating from the barrel of the weapon gases to escape in the event of excessive pressure and gastikutz limit the speed of movement of the movable parts ,
• This solution is intended for semi-automatic firearms, especially shotguns, and requires a spring loaded control valve.
• the object of the present invention is to provide an improved gas take-off device which at least partially eliminates the problems described above.
• a gas take-off device In this case, run, gas cylinder, gas outlet opening and a throttle element are designed and arranged so that the temperature-induced change in length of the barrel, which occurs at continuous fire, causes a relative movement between the gas cylinder and throttle element, so that the throttle element, the gas outlet opening more or less freely and thus the in the pressure chamber acting gas pressure stabilized according to the running temperature.
• a self-regulating gas sampling device is provided in which the change in length of the barrel changes the pressure and flow conditions in the gas cylinder so that the temperature-induced increased gas pressure in the barrel causes no significant pressure increase in the pressure chamber.
• claim 2 relates to a throttle element, which is arranged in the interior and / or outside of the gas cylinder.
• the relative movement is particularly easily ensured by the throttle element is fixed relative to a thermally less stressed housing component and the gas cylinder is fixed with respect to a running section.
• the throttle element is used to control the throttle element so the axial relative movement between the corresponding barrel portion and the housing.
• the throttle element is formed on a gas cylinder at least partially surrounding recording.
• the gas cylinder is arranged axially displaceable for receiving.
• This solution provides a structurally particularly simple operative connection between throttle element and gas cylinder and thus between the gas outlet opening and throttle element.
• the throttle element is designed as a sealing zone, which is formed on the receptacle and corresponding to the axial barrel displacement mounted in the gas cylinder gas outlet opening reduced or increased.
• the sealing zone pushes more or less over the first gas outlet opening and relocated or opened their cross-section and the resulting from the barrel bore forth in the pressure chamber pressure is more or less on the corresponding Covered or uncovered gas outlet opening reduced.
• the gas cylinder is connected to a connection part fixed to the barrel.
• this connector is also advantageously the communicating connection between the pressure chamber or gas cylinder and the barrel bore instead.
• the fixed connection with the barrel ensures that the gas cylinder moves according to the axial displacement of the barrel, so that the relative movement takes place between recording or arranged on the recording sealing zone and the gas cylinder or the gas outlet opening mounted therein.
• An interference fit ensures that the fitting and barrel are sealed against each other so that no gas leaks between the barrel and fitting.
• a positive connection via a pin can additionally take place.
• This pin can also be designed so that it fixes the connecting part and thus the gas cylinder in the desired circumferential position with respect to the barrel.
• the receptacle is connected via a sleeve which surrounds the gas linkage and thus protects, firmly connected to a housing component. This is on the one hand shielded the gas linkage and on the other hand, the temperature of the barrel largely decoupled fixation of the recording possible.
• an axially displaceable to the running axis support member may be additionally secured to the receptacle.
• This support element prevents transverse forces acting on the receptacle are transmitted to the gas cylinder and possibly affect the displaceable arrangement between the gas cylinder and recording.
• a further gas outlet opening may be provided in the gas cylinder in order to facilitate the tuning of the gas take-off device to a specific weapon configuration.
• this vote is particularly easy to perform by this additional gas outlet opening is arranged in a removable insert. The vote is made simply by choosing a corresponding insert with a correspondingly large gas outlet opening. It is also possible to make this vote, for example via a control valve according to claim 12.
• Claims 13 and 14 relate to a barrel with an inventive gas take-off device or a weapon, in particular a machine gun, with such a barrel.
• FIG. 1 shows a partial sectional view of the barrel and a housing assembly of a machine gun, which is provided with a gas take-off device according to the invention
• FIG. 2 shows an enlarged detail from FIG. 1, which shows the gas removal device according to the invention
• Fig. 3 is a side perspective view of in
• Fig. 4 shows the view of Fig. 3 in a hot gun barrel.
• Fig. 1 the front part of a machine gun is shown with a barrel assembly 1 and a housing assembly 2, wherein barrel assembly 1 and housing assembly 2 are shown partially cut. Housing assembly 2 and Limposed- group 1 are connected to each other via the gas take-off 3. Not shown are the subsequent to the rear part of the housing assembly trigger mechanism and other housing components with closure guide and shoulder rest.
• a carrying handle 4 attached to the gas take-off 3 a sighting device 5 and at the mouth of the barrel 1, a muzzle fire brake 6.
• the ammunition (not shown) is strapped and automatically fed via a corresponding mechanism (not shown) to the arranged in the rear end of the barrel 10 cartridge chamber and ignited there.
• the ignited propellant catapulted the projectile from the cartridge case through the barrel bore 7, which runs concentrically to the so-called soul axis 8, forward out of the muzzle towards the target.
• a portion of the propellant gas passes through a tap hole 9, which extends transversely to the bore 7 radially in the barrel 10 and is coaxially connected thereto in the gas take-off 3 introduced gas channel 11 and the main channel 12 guided in the pressure chamber 14 formed by the gas cylinder 13.
• a gas piston 15 which is connected to the gas linkage 16, or is formed thereon.
• two rings 17 are formed with cylindrical outer surfaces for guiding and sealing, which lie with a corresponding fit on the cylindrical inner wall 18 of the gas cylinder 13 slidably.
• the fit between the outer surfaces of the rings 17 and the cylindrical inner wall 18 is selected so that the gas piston 15 in the gas cylinder thirteenth displaceable but largely arranged gas-tight.
• the sliding along each other surfaces are mechanically processed accordingly (turning, milling, grinding, Höhen) and to increase the durability ggf. Surface treated (hardened, chrome plated, coated, etc.).
• the propellant gas which has entered the pressure chamber 14 builds a working pressure between the end face 19, 19 'of the gas piston 15 and the end face 20, 20' of the gas cylinder 13 or the pressure chamber 14, which moves the gas piston 15 and thus the throttle linkage 16 backwards, wherein the throttle linkage 16 transmits the pressure pulse to the weapon drive, which drives the shutter and loading mechanism.
• the gas take-off 3 and the gas cylinder 13 formed integrally thereon are connected to the barrel 10 via a collar 21.
• the sleeve 21 is shrunk to a corresponding outer shell portion 22 with appropriate fit.
• the axial position on the barrel 10 is defined by a shoulder 23, against which the sleeve 21 rests with its rear end face.
• the sleeve 21 and thus the gas take-off 3 are additionally set axially and circumferentially to run 10.
• the gas cylinder 13 is held with its outer side in a sleeve-like cylindrical receptacle 25 axially displaceable.
• the receptacle 25 is fixedly connected to the housing assembly 2 via the sleeve 26 surrounding the gas rod 16.
• the receptacle 25 is supported via a guide fork 27 on the running jacket 10, wherein the guide fork 27 is formed so that axial relative movements between the barrel 10 and receptacle 25 are possible.
• a sealing portion 28 is formed in the front region, which closely surrounds a corresponding portion on the outside of the gas cylinder 13, but so that relative movements (axial sliding movements) between the gas cylinder 13 and receptacle 25 are possible.
• the first gas outlet opening 29 is formed through which a part of the propellant gas acting in the pressure chamber 14 exits. This gas outlet opening 29 is partially covered by formed on the inside of the receptacle 25 sealing portion 28.
• Fig. 3 shows the arrangement of the gas cylinder 13 with the partially covered first gas outlet opening 29 in cold running.
• the gas outlet opening 29 is partially covered by the sealing portion 28 at the front edge 31 of the recess 30, so that the cross-sectional area of the first gas outlet opening 29 is reduced.
• the pressure energy acts more or less completely in the pressure chamber 14 on the gas piston 15 and thus on the gas linkage 16.
• the gas outlet opening 29 moves relative to the front edge 31 of the recess 30 by the thermal expansion to the front.
• This condition is shown in FIG.
• the cross section of the gas outlet opening 29 is here largely exposed and the increased flow cross-section causes increased gas discharge and thus a pressure reduction in the pressure chamber 14, which compensates for the temperature-induced pressure increase in the bore 7.
• This control mechanism stabilizes the weft cadence and the pressure pulses acting in the pressure chamber 14 and thus the ammunition consumption and the mechanical stress of the weapon mechanism.
• a second gas outlet opening 32 is provided which extends axially to the main channel 12 and serves for the basic adjustment of the weft cadence and of the pressure acting in the pressure chamber 14 gas pressure.
• This second gas outlet opening 32 is arranged in an insert 33, which is inserted via an external thread into a corresponding recess in the gas decrease 3 can be.
• For sealing is at the rear end of the
• Insert a circumferential sealing edge 34 is formed, which engages with screwed insert 33 at a corresponding paragraph 35 in the gas take-off 3, so that during operation of the weapon no gas between the insert 33 and 3 gas can escape.
• the second gas outlet opening 32 is so large that the pressure in the pressure chamber 14 together with the first gas outlet opening 29, which is partially covered by the sealing portion 28 and the front edge 31 of the recess 30 is set in that the desired basic cadence (in the exemplary embodiment about 800 rounds per minute with a tolerance of +/- 50 to +/- 100 rounds per minute) is set.
• running assemblies 1 can be tuned with the fixed thereto coupled gas take-off 3 on different housing assemblies 2 and different weapons.
• Manufacturing and assembly tolerances, which cause the first gas outlet opening 29 is covered differently far from the sealing portion 28 of the receptacle 25 can be compensated by a corresponding insert 33 is selected with a correspondingly large second gas outlet opening 32.
• the pressure chamber 14 by the gas cylinder 13 which is disposed within the receptacle 25, set.
• the pressure chamber is defined by an external gas cylinder into which a receptacle arranged on the sleeve protrudes. In this shot, the gas piston moves. A front edge of the receptacle covers the first gas outlet opening inwardly relative to Run fixed gas cylinder according to the heat condition
• the first gas outlet opening 29 formed in the exemplary embodiment can also have other cross-sectional shapes (for example, rectangular or triangular) to improve the pressure control.
• the choice of cross section allows either a linear, degressive or progressive enlargement or reduction of the variable flow cross section of the first gas outlet opening 29 with temperature-induced changes in length of the barrel 10. It is also possible to provide a plurality of first gas outlet openings 29 which are arranged axially offset and be exposed or covered one after the other.
• the insert 33 with the second gas outlet opening 32 can also be replaced by an adjustable valve with which the flow cross section of the second gas outlet opening 32 can be adjusted in accordance with the desired basic cadence or the weapon configuration.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Filling Or Discharging Of Gas Storage Vessels (AREA)
• Toys (AREA)
• Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
• Air Bags (AREA)
• Sampling And Sample Adjustment (AREA)

Applications Claiming Priority (2)

Publications (2)

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ID=37744110

Family Applications (1)

Country Status (11)

Families Citing this family (23)

Family Cites Families (16)

• 2005
  • 2005-12-23 DE DE102005062758A patent/DE102005062758B3/de not_active Expired - Fee Related
• 2006
  • 2006-12-12 AU AU2006334788A patent/AU2006334788B2/en not_active Ceased
  • 2006-12-12 DK DK06829529T patent/DK1963772T3/da active
  • 2006-12-12 WO PCT/EP2006/011947 patent/WO2007079879A1/fr active Application Filing
  • 2006-12-12 CA CA2632150A patent/CA2632150C/fr not_active Expired - Fee Related
  • 2006-12-12 AT AT06829529T patent/ATE450769T1/de not_active IP Right Cessation
  • 2006-12-12 EP EP06829529A patent/EP1963772B1/fr not_active Not-in-force
  • 2006-12-12 ES ES06829529T patent/ES2336031T3/es active Active
  • 2006-12-12 DE DE502006005553T patent/DE502006005553D1/de active Active
  • 2006-12-12 KR KR1020087015067A patent/KR101163815B1/ko active IP Right Grant
• 2008
  • 2008-06-19 ZA ZA200805325A patent/ZA200805325B/xx unknown
  • 2008-06-20 US US12/143,515 patent/US7621210B2/en not_active Expired - Fee Related

Non-Patent Citations (1)

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