CN214199832U - Blank cartridge firing accessory for machine gun - Google Patents

Abstract

The utility model relates to an empty packet bullet launches annex for machine gun. The accessory (1) comprises a front flange (6), a muzzle flow restrictor (5) and a coaxial rear flange (9), the front flange (6) having a central opening, the muzzle flow restrictor (5) being intended to be mounted on the muzzle head end of a barrel (3) of a machine gun (2), the rear flange (9) having a central opening, the front flange (6) and the rear flange (9) being connected by a parallel rod (10). The accessory (1) comprises an openable clamp (15) for connecting the rear flange (9) to the barrel support (7) of the machine gun (2), said clamp (15) being formed by arched articulated links (14) connected by connecting pins (13), said clamp (15) being connected to a recoil booster (12), the recoil booster (12) being adapted to be connected to the rear flange (9) by means of a threaded connection (11).

Description

Blank cartridge firing accessory for machine gun

Technical Field

The present invention relates to blank cartridge launching attachments for machine guns and, more particularly, to a machine gun structure for attaching blank cartridge launching attachments (i.e., for launching blank cartridges) to a machine gun for brownin M2. It will be apparent to those skilled in the art that the accessory may also be used with other guns having similar designs to the barrel and barrel support of the brownin M2 gun.

Background

With live ammunition, the recharging of the brownin M2 gun is based on the energy released by the bullet acceleration, i.e., recoil. When a blank bullet is fired, no bullet mass is present and the combustion gases are expelled from the barrel without resistance and substantially without recoil. Thus, automatic gun reloading does not occur. The purpose of the blank cartridge launching accessory is to utilize the exhaust combustion gases and provide the necessary recoil for automatic refill by backpressure.

US patent 4128040 (published 5/12 1978) describes an empty-pack projectile launching attachment for machine gun brirons M2 (recoil booster). The attachment is secured to the machine gun by a U-shaped member which in use is positioned in front of a magazine strip containing empty cartridges below a magazine lid. The U-shaped piece prevents loading of the loaded magazine belt into the machine gun due to the fact that it is placed in the area where the cartridge at the end of the magazine should be placed in the loaded machine gun. To install or remove the accessory from the gun, the magazine lid is opened and the magazine belt is removed. Furthermore, installing or removing the blank ammunition firing accessory requires that the muzzle restrictor at the end of the accessory be separately installed to or removed from the barrel end, which makes the overall process time consuming and complicated. It also requires tools.

Also described is an empty case projectile launching accessory with mark M19 BFA, where the muzzle restrictor mounted to the end of the barrel is connected by three rods to a flange, whereby the flange is located at the end of the barrel support surrounding the barrel and is secured into the opening of the barrel support surrounding the barrel with a protrusion at the end of a pivot pin (network publication PS Magazine, "M2 a1 Machine Gun: Install the M19 BFA the Right Way (M2a1 Machine Gun: M19 BFA mounted in the correct manner", published on year 2020, month 07, 01).

The only option in this solution to ensure a tight fit of the blank projectile launching accessory on the barrel support is to tighten the nut on the end of the rod or on the end of the pivot pin on the side of the support, but this requires a separate tool. The muzzle restrictor is placed at the end of the barrel with some play (i.e., a narrow gap) so that the muzzle restrictor can create enough backpressure to automatically reload, i.e., load, the next magazine from the magazine strip into the barrel.

SUMMERY OF THE UTILITY MODEL

The utility model provides an air-bag bullet launching accessory for machine gun, it includes preceding flange, muzzle current limiter and coaxial rear flange, and this preceding flange has central opening, and this muzzle current limiter aims at installing on the muzzle head of the barrel of machine gun, and this rear flange has central opening, the flange passes through the parallel bar and connects.

The accessory comprises an openable circular clamp for connecting the rear flange to the barrel support of the machine gun, whereby said clamp is formed by arched articulated links connected at the ends by connecting pins, wherein in the closed position of said articulated links a central circular opening is formed in the centre of the clamp.

Wherein at least some of the links have studs on their surfaces that project towards the centre of the opening formed by the links of the clamp.

At one edge of the circular opening of the closed clamp, the links have a circular inner groove that opens towards the center.

The clamp is connected to the recoil booster by a single joint pin, wherein the recoil booster with a central opening has a circular step at the edge with an outer groove.

In the closed position of the clamp formed by the links, the inner grooves on the links engage the outer grooves on the steps of the recoil booster.

The recoil aid and the rear flange are interconnected by a threaded connection such that in the closed position, the central opening of the clamp formed by the chain links, the opening of the recoil aid, the opening of the rear flange screwed into the recoil aid, and the openings of the front flange and the muzzle restrictor are all coaxial.

In a preferred embodiment, the threaded connection between the recoil aid and the rear flange includes a threaded opening in the recoil aid configured to receive a threaded bore of the rear flange such that, in the closed position, the central opening of the clamp formed by the links, the opening of the recoil aid, the opening of the rear flange screwed into the recoil aid, and the openings of the front and muzzle restrictors are all coaxial.

In another embodiment, the threaded connection between the recoil aid and the rear flange includes a threaded bore of the central opening of the rear flange configured to receive the threaded bore of the recoil aid such that, in the closed position, the central opening of the clamp formed by the links, the opening of the recoil aid, the opening of the rear flange screwed into the recoil aid, and the opening of the front flange and the muzzle restrictor are all coaxial.

The utility model provides a characteristic of blank cartridge launch annex especially lies in, and the annex of fixing in the opening of the barrel support piece that encircles the machine gun barrel includes solitary anchor clamps, and this anchor clamps need not the instrument and can install fast and remove.

The clamp is formed by a number of (e.g. three or four) arched articulated links interconnected by connecting pins, wherein the links in the closed position form a circle around the barrel support, wherein the inner surface of each link facing the support has a stud designed to engage with an opening in the support. The joint pin connecting the two center links is firmly connected to the recoil booster, which is also disposed around the barrel support.

The ends of the outermost links on either side of the pin are interconnected with an eccentric tensioning device at a location around the barrel support. The eccentric tightening device is equipped with a quick fixing catch to avoid spontaneous opening.

The part of the recoil guide facing the clamp has a step with a circular outer groove in which the walls of the inner groove at the edge of the surface of each link facing the barrel support fit in the closed position of the clamp, thereby engaging the inner and outer grooves with each other. In other words, the recoil and the closed clamp are tightly coupled to each other.

The recoil aid has a through stepped opening around the barrel support, the smaller diameter bore of the stepped opening corresponding to the diameter of the barrel support and the larger diameter bore of the stepped opening being threaded.

The rear flange is screwed into a threaded hole of an opening in the recoil aid, wherein a rod extending in the direction of the barrel is fixed to the opposite side, whereby the front flange with the muzzle restrictor is fixed to the other end of the rod.

In use, the muzzle restrictor is fitted to the top of the barrel of the machine gun to create the backpressure required for refilling during the firing of empty-pack projectiles. There is a play between the muzzle restrictor and the barrel, but due to the large volume of the released charge gas, refilling will occur anyway. Play/clearance is necessary because in the brownian M2 machine gun, the barrel is in reciprocating linear motion relative to the barrel support of the machine gun and because the blank-pack firing accessory is fixed and not moving relative to the support, the tip of the barrel must be able to reciprocate within the muzzle restrictor.

To prevent the rear flange from vibrating out of the opening of the recoil booster, a locking device is used that does not allow the rear flange to pivot in the threaded opening of the recoil booster. The surface of the recoil aid facing the rear flange has an opening, recess or tooth for receiving the end of the locking device.

The clamp, the recoil aid, the rear flange, the front flange, and the muzzle restrictor are positioned coaxially about the barrel in the operational position.

According to the utility model discloses, the annex is divided into two separable subassemblies to first subassembly includes anchor clamps and recoil ware, and the second subassembly includes muzzle current limiter, preceding flange, back flange and pole. In the operating state, these components are connected to one another by a threaded connection when mounted on the machine gun.

To fire the accessory using an empty-pack, the open clamp with the attached recoil starter is first placed on the barrel and pushed along the barrel toward the rear of the machine gun until the recoil starter is assembled with the clamp at the end of the barrel support. The clamp is then closed around the barrel support with an eccentric tensioning device, so that the studs on the support-facing surface of each link of the clamp fit into corresponding openings in the circle of the barrel support. The eccentric tension device is further fixed through the quick fixing buckle.

The rear flange, with attached rod and front flange and muzzle restrictor, is then pushed onto the barrel of the machine gun. The threaded hole of the rear flange is screwed into the threaded hole of the recoil booster so that the muzzle restrictor on the front flange fits around the end of the barrel support with some play, and the threaded hole of the rear flange screwed into the recoil booster is tightened against the end of the barrel support, holding the entire blank-pack ejection accessory stably in place relative to the barrel support.

The rear flange is then fixed relative to the recoil booster using the locking device. The diameter of the rear flange is such that it can be manually screwed into the recoil aid opening without tools to ensure that the muzzle stop fits over the top of the barrel.

There are various types of barrel supports, some having openings in a circle every 90 degrees on the barrel support, and others having openings in a circle every 120 degrees, i.e., four or three openings in a circle, respectively.

Accordingly, the studs in the links of the clamp must be placed in the correct positions. For this purpose, the links of the gripper can be marked with relevant markings.

Drawings

The invention will now be described with reference to the accompanying schematic drawings, in which:

FIG. 1 is an isometric view of an empty bag projectile launching attachment;

FIG. 2 is an isometric view of the blank cartridge firing attachment of FIG. 1 mounted on a machine gun;

FIG. 3 is a side view of the attachment shown in FIG. 1;

FIG. 4 is an end view of the attachment of FIG. 1 as seen from the muzzle restrictor;

FIG. 5 is an end view of the attachment of FIG. 1 as seen from a clamp having a quick-fix opening;

FIG. 6 is a detailed cross-sectional view of the inner grooves in the links of the clamp interengaging with the outer grooves on the recoil booster and the rear flange being connected to the recoil booster by a threaded connection;

FIG. 7 is a longitudinal cross-section of a muzzle restrictor;

FIG. 8 is an isometric view of the recoil and open clamp and rear flange (without the stem, front flange and muzzle restrictor) prior to insertion into the recoil;

FIG. 9 is a side view of the recoil and open clamp with the rear flange (without the stem, front flange and muzzle restrictor) prior to insertion into the recoil;

FIG. 10 is the view of FIG. 9 in the 180 degree rotated position;

FIG. 11 is an end view of the recoil assembly, open clamp with recoil assembly, and rear flange as viewed from the clamp;

FIG. 12 is an isometric view of the recoil and closed clamp with the rear flange (without the stem, front flange and muzzle restrictor) after insertion into the recoil;

FIG. 13 is an end view of FIG. 11 as viewed from the rear flange;

FIG. 14 is an end view of the recoil assembly, closed clamp with recoil assembly and rear flange as viewed from the clamp;

fig. 15 is a side view of the recoil and closed clamp with the rear flange (without the stem, front flange and muzzle restrictor) after insertion into the recoil.

Reference numerals

1. An empty cartridge launch accessory; 2. a machine gun; 3. a barrel; 4. a top end of the barrel; 5. a muzzle current limiter; 6. A front flange; 7. a barrel support; 8. an opening (in the barrel support); 9. a rear flange; 10. a rod; 11. a threaded connection; 12. a withdrawal aid; 13. a connecting pin; 14. a chain link; 15. a clamp; 16. a stud; 17. an inner groove (in the chain link); 18. a joint pin; 19. a circular step; 20. an outer groove (in the exit aid); 21. a threaded opening in the recoil aid; 22. a threaded hole; 23. an eccentric tensioning device; 24. quickly fixing the buckle; 25. a locking device; 26. an end of the locking device; 27. a recess; 28. and (4) a step.

Detailed Description

For purposes of clarity, the same reference numbers will be used in different drawings to identify similar elements or components.

Figure 1 is a view of the blank cartridge launching accessory 1 of the present invention in the position shown in figure 2 when installed on the machine brironm 2. The accessory 1 comprises a muzzle limiter 5, which muzzle limiter 5 is placed with play on the top end 4 of the barrel 3 of the machine gun 2, which muzzle limiter is fixed to a front flange 6.

The barrel support 7 surrounding the barrel 3 of the machine gun 2 comprises an opening 8, see fig. 2. The accessory 1 comprises a rear flange 9, the rear flange 9 and the front flange 6 being connected to each other by three rods 10, see fig. 1 to 3.

A longitudinal cross-section of an embodiment of the muzzle restrictor in which the outer surface of the muzzle restrictor is threaded to connect the muzzle restrictor 5 into the central threaded opening of the front flange 6 is provided in fig. 7. Muzzle flow restrictor 5 comprises an inner cylindrical cavity in which the tip 4 of barrel 3 can reciprocate with some play during firing.

The rod 10 is also connected to the front flange 6 and the rear flange 9 by a threaded connection 11.

The rear flange 9 is connected to the recoil booster 12 by a threaded connection 11. An openable circular clamp 15 formed by arched articulated links 14 connected at the ends by connecting pins 13 is connected to the recoil guide 12, which clamp 15, when in the closed position, forms a circular opening in the centre of the clamp 15.

Wherein at least some of the links 14 have studs 16 on the surface, said studs 16 protruding towards the centre of the opening formed by the links 14 of the clamp 15.

The links 14 have a circular inner recess 17 opening towards the centre at one edge of the circular opening of the closed clamp 15, see fig. 6, 8 and 9.

The clamp 15 is connected by a joint pin 18 to a recoil guide 12 having a central opening, the recoil guide 12 having a circular step 19 at the edge, the circular step 19 having a circular outer groove 20.

The ends of the outermost links 14 on both sides of the joint pin 18 are interconnected at a position around the barrel support 7 by an eccentric tensioning device 23. The eccentric tightening device 23 is equipped with a quick fixing catch 24 to avoid spontaneous opening.

In the closed position of the clamp 15 formed by the links 14, the inner recesses 17 in the links 14 engage with the outer recesses 20 on the steps 19 of the recoil aid 12. Studs 16 on the inner surface of links 14 facing barrel support 7 are designed to engage openings 8 of support 7, see fig. 6.

In the closed position of the clamp 15, the inner groove 17 and the outer groove 20 engage each other, so that the recoil booster 12 and the closed clamp 15 are tightly connected to each other.

The recoil aid 12 has a through stepped opening around the barrel support 7, the smaller diameter bore of the stepped opening corresponding to the diameter of the barrel support 7, and the larger diameter bore 22 of the stepped opening being threaded.

In the illustrated embodiment, the threaded connection 11 between the recoil reducer 12 and the rear flange 9 includes a threaded bore 21 in the recoil reducer 12, the threaded bore 21 configured to receive a threaded bore 22 of the rear flange 9.

The threaded hole 22 screwed into the recoil aid 12 is screwed against the end of the barrel support 7, holding the entire blank-firing accessory 1 stably in place with respect to the barrel support 7, for which purpose the internal diameter of the threaded hole 22 has a step 28, the step 28 preferably matching the diameter of the barrel support 7, which helps to center the accessory 1 on the barrel support 7, see fig. 7.

The reverse embodiment is also possible, in which the threaded holes are located in the rear flange and the threaded holes screwed into the rear flange are located in the recoil aid (not shown in the figures).

Threaded holes 22 of the rear flange are screwed into threaded holes 21 of the recoil aid 12, wherein the rod 10 extending in the direction of the barrel 3 is fixed to the opposite side, thereby fixing the front flange 6 with the muzzle restrictor 5 to the other end of the rod 10.

In use, the muzzle restrictor 5 fits around the top end 4 of the barrel 3 of the machine gun 2 with some play to create the backpressure required for refilling during firing of empty-packed projectiles.

To prevent the rear flange 9 from vibrating out of the opening 21 of the recoil 12 during firing, a locking device 25 is designed that does not allow the rear flange 9 to pivot in the threaded opening 21 of the recoil 12. For this purpose, the surface of the recoil aid 12 facing the rear flange 9 has a recess 27 (or opening, recess or tooth) for receiving the end 26 of the locking device.

The clamp, the recoil aid, the rear flange, the front flange, and the muzzle restrictor are positioned coaxially about the barrel in the operational position.

The clamp 15 and the recoil booster 12 form a separate assembly, while the muzzle restrictor 5, the forward flange 6, the rearward flange 9, and the stem 10 form another separate assembly.

To use the accessory 1, the opened clamp 15 with the recoil aid 12 attached is placed on the barrel 3 of the machine gun 2 and pushed along the barrel support 7 towards the barrel 3 until the clamp 15 is fitted on the end of the barrel support together with the recoil aid 12. Thereafter, if necessary, the clamp 15 is rotated together with the recoil aid 12 so that the stud 16 fits into the circular opening 8 in the barrel support 7 when the clamp 15 is closed. The clamp is then locked with the eccentric tensioner 23 and secured with the quick-fix clasp 24.

In this position, the clamp 15 and the first assembly of the recoil guide are secured to the end of the barrel support 7.

Now the second assembly consisting of muzzle limiter 5, front flange 6, rear flange 9 and rod 10 is placed on barrel 3, whereby the top end 4 of barrel 3 fits into muzzle limiter 5 and the threaded hole 22 of rear flange 9 is screwed into the threaded hole 21 of the recoil aid 12, i.e. muzzle limiter 5 is screwed onto the top end 4 of barrel 3 by means of the threaded connection 11, which threaded connection 11 is formed by the threaded hole 22 of the above-mentioned rear flange 9 and the threaded opening 21 of the recoil aid 12. For locking into the tightening position, the rear flange 9 has a locking device 25, the end 26 of which locking device 25 engages with a recess 27 on the surface of the recoil aid 12 facing the rear flange 9.

Claims (20)

1. Blank-pack launch accessory for a machine gun, comprising a front flange (6), a muzzle flow restrictor (5) and a coaxial rear flange (9), the front flange (6) having a central opening, the muzzle flow restrictor (5) being intended to be mounted on the top end (4) of a barrel (3) of a machine gun (2), the rear flange (9) having a central opening intended to be connected to a barrel support (7) of the barrel (3) of the machine gun (2), wherein the front flange (6) and the rear flange (9) are connected by parallel bars (10), characterized in that the accessory (1) comprises an openable circular clamp (15) for connecting the rear flange (9) to the barrel support (7) of the machine gun (2), whereby the clamp (15) is formed by arched hinge links (14) connected at the ends by connecting pins (13), wherein in the closed position of the hinge links (14), a central circular opening is formed in the center of the clamp (15),

wherein at least some of the links (14) have studs (16) on their surface, said studs (16) projecting towards the centre of the opening formed by the links (14) of the clamp (15), and

at one edge of the circular opening of the closed clamp (15), the chain link (14) has a circular inner groove (17) opening towards the centre,

whereby the clamp (15) is connected to the recoil (12) by a single joint pin (18), wherein said recoil (12) having a central opening has a circular step (19) at the edge, which circular step (19) has an outer groove (20),

so that in the closed position of the clamp (15) the inner grooves (17) on the chain links (14) engage with the outer grooves (20) on the circular steps (19) of the recoil booster (12),

the recoil aid (12) and the rear flange (9) can thus be connected to each other by means of the threaded connection (11) in such a way that, in the closed position, the central opening of the clamp (15) formed by the chain links (14), the opening of the recoil aid (12), the opening of the rear flange (9) screwed into the recoil aid (12) and the opening of the front flange (6) and the muzzle restrictor (5) are all coaxial.

2. Blank-pack launch attachment for a machine gun according to claim 1, characterized in that the threaded connection (11) between the recoil booster (12) and the rear flange (9) comprises a threaded opening (21) in the recoil booster (12), which threaded opening (21) is configured to receive a threaded hole (22) of the rear flange (9), so that in the closed position the central opening of the clamp (15) formed by the chain link (14), the opening of the recoil booster (12), the opening of the rear flange (9) screwed into the recoil booster (12) and the opening of the front flange (6) and the muzzle restrictor (5) are all coaxial.

3. Blank-pack launch attachment for a machine gun according to claim 1, characterized in that the threaded connection (11) between the recoil booster (12) and the rear flange (9) comprises a threaded hole (22) of the central opening of the rear flange (9), which threaded hole (22) is configured to receive the threaded hole (22) of the recoil booster (12), so that in the closed position the central opening of the clamp (15) formed by the chain link (14), the opening of the recoil booster (12), the opening of the rear flange (9) screwed into the recoil booster (12) and the opening of the front flange (6) and the muzzle restrictor (5) are all coaxial.

4. Blank-pack-firing attachment for machine guns according to any of claims 1 to 3, characterized by the fact that the clamp (15) is formed by three or four links (14).

5. Blank cartridge launching accessory for a machine gun according to any of claims 1-3, characterized in that the clamp (15) is equipped with an eccentric tightening device (23) for closing.

6. Blank cartridge launching accessory for machine guns according to claim 4, characterized by the fact that the clamp (15) is equipped with an eccentric tensioning device (23) for closing.

7. Blank cartridge launching accessory for machine guns according to claim 5, characterized by the fact that the eccentric tensioning device (23) is equipped with a quick-fixing catch (24) to avoid spontaneous opening.

8. Blank cartridge launching accessory for machine guns according to claim 6, characterized by the fact that the eccentric tensioning device (23) is equipped with a quick-fixing catch (24) to avoid spontaneous opening.

9. Blank cartridge launching accessory for a machine gun according to any of claims 1-3 and 6-8, characterized in that the accessory (1) is equipped with a locking device (25) for fixing the rear flange (9) in the threaded opening (21) of the recoil (12).

10. Blank cartridge launching accessory for a machine gun according to claim 4, characterized in that the accessory (1) is equipped with a locking device (25) for fixing the rear flange (9) in the threaded opening (21) of the recoil (12).

11. Blank cartridge launching accessory for a machine gun according to claim 5, characterized in that the accessory (1) is equipped with a locking device (25) for fixing the rear flange (9) in the threaded opening (21) of the recoil (12).

12. Blank cartridge launching accessory for a machine gun according to any of claims 1-3, 6-8 and 10-11, characterised in that the surface of the recoil (12) facing the rear flange (9) has recesses (27) or teeth for the end (26) of the locking means (25).

13. Blank cartridge launching accessory for a machine gun according to claim 4, characterised in that the surface of the recoil (12) facing the rear flange (9) has a recess (27) or tooth for the end (26) of the locking device (25).

14. Blank cartridge launching accessory for a machine gun according to claim 5, characterised in that the surface of the recoil (12) facing the rear flange (9) has a recess (27) or tooth for the end (26) of the locking device (25).

15. Blank cartridge launching accessory for a machine gun according to claim 9, characterised in that the surface of the recoil (12) facing the rear flange (9) has a recess (27) or tooth for the end (26) of the locking device (25).

16. Blank-pack launch accessory for a machine gun according to any of claims 1-3, 6-8, 10-11 and 13-15, characterized in that the accessory (1) is divided into two separable assemblies, whereby the first assembly comprises a clamp (15) and a recoil (12) and the second assembly comprises a muzzle restrictor (5), a front flange (6), a rear flange (9) and a stem (10).

17. Blank-pack launching accessory for machine guns according to claim 4, characterized by the fact that the accessory (1) is divided into two separable assemblies, so that the first assembly comprises the clamp (15) and the recoil (12) and the second assembly comprises the muzzle restrictor (5), the front flange (6), the rear flange (9) and the stem (10).

18. Blank-pack launching accessory for machine guns according to claim 5, characterized by the fact that the accessory (1) is divided into two separable assemblies, so that the first assembly comprises the clamp (15) and the recoil (12) and the second assembly comprises the muzzle restrictor (5), the front flange (6), the rear flange (9) and the stem (10).

19. Blank-pack launch attachment for a machine gun according to claim 9, characterized in that the attachment (1) is divided into two separable assemblies, whereby the first assembly comprises a clamp (15) and a recoil (12) and the second assembly comprises a muzzle restrictor (5), a front flange (6), a rear flange (9) and a stem (10).

20. Blank-pack launch attachment for a machine gun according to claim 12, characterized in that the attachment (1) is divided into two separable assemblies, whereby the first assembly comprises a clamp (15) and a recoil (12) and the second assembly comprises a muzzle restrictor (5), a front flange (6), a rear flange (9) and a stem (10).

Images