LR2C type 12.7 mm semi-automatic anti-materiel rifle

Abstract

The application discloses an LR2C type 12.7 mm semi-automatic anti-equipment rifle, and belongs to the technical field of gun equipment, which is characterized by comprising a barrel assembly, an automatic machine assembly, a launching machine assembly, a cartridge magazine assembly, a machine case assembly, a gun bolt return spring assembly, a butt assembly and a white light sighting telescope assembly, further comprising: an energy absorption module, which is arranged in the barrel assembly and adopts a mechanical ring flow type piston structure and is used for absorbing recoil energy; a recoil brake, which is arranged in the launching machine assembly and is provided with three chambers and is used for slowing down the recoil velocity of the barrel through reverse impact force; and an automatic machine module, which is arranged in the machine case assembly and is used for separating the automatic machine assembly from the barrel assembly and unlocking in the middle and rear sections of the recoil stroke in the recoil process, and is used for forcibly locking the machine head through screw cooperation in the return process, so that the rifle has the advantages of energy absorption, buffering, shooting precision enhancement and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gun equipment, in particular to a LR2C type 12.7mm semi-automatic anti-equipment rifle. BACKGROUND

[0002] The gun is mainly used for launching bullets, killing exposed living targets and destroying thin-walled armored targets. It is the main weapon of infantry and is widely equipped in other military and armed forces, and is also applied to public security, hunting and sports competitions.

[0003] The shooting accuracy of the gun is affected by many factors, but the recoil has a more prominent effect on the senses, especially the large-caliber sniper rifle, which is difficult to shoot and easy to cause the gun to lose control and miss the target.

[0004] The existing anti-equipment rifle has the disadvantages of large recoil, large overall gun length and size, inconvenient carrying, and large overall gun weight. SUMMARY

[0005] In view of the deficiencies in the prior art, the purpose of the embodiments of the present application is to provide a LR2C type 12.7mm semi-automatic anti-equipment rifle to solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0007] A LR2C type 12.7mm semi-automatic anti-equipment rifle, comprising a barrel assembly, the barrel assembly is connected to an automatic mechanism assembly, the automatic mechanism assembly is connected to a firing mechanism assembly, the firing mechanism assembly is connected to a magazine assembly, the firing mechanism assembly is provided with a magazine assembly, the magazine assembly is connected to a recoil spring assembly, the magazine assembly is connected to a butt assembly, the magazine assembly is connected to a white light sighting scope assembly, and the LR2C type 12.7mm semi-automatic anti-equipment rifle further comprises:

[0008] An energy absorption module, the energy absorption module is arranged in the barrel assembly, the energy absorption module adopts a mechanical ring flow type piston structure, and the energy absorption module is used for absorbing recoil energy;

[0009] A recoil brake, the recoil brake is arranged in the firing mechanism assembly, the recoil brake is provided with three chambers, and the recoil brake slows down the recoil velocity of the barrel through reverse impact force; and

[0010] An automatic mechanism module, the automatic mechanism module is arranged in the magazine assembly, the automatic mechanism module realizes the separation of the automatic mechanism assembly and the barrel assembly and the unlocking in the middle and rear sections of the recoil stroke through the recoil process, and relies on the spiral cooperation to forcibly lock the machine head during the return.

[0011] As a further scheme of the present application, the energy absorption module comprises:

[0012] A piston is movably connected to a guide cylinder, and the guide cylinder is connected to a barrel.

[0013] A barrel return spring is arranged in the guide cylinder, and the barrel return spring is connected to the piston.

[0014] According to a further aspect of the present application, the barrel return spring is made of high-strength steel wire.

[0015] According to a further aspect of the present application, an elastic buffer pad is arranged in front of the guide cylinder, and the elastic buffer pad is used to absorb the recoil energy.

[0016] According to a further aspect of the present application, the automatic machine module comprises:

[0017] A hanging blocking iron is symmetrically arranged on a guide spring rod, and the guide spring rod is connected to a machine head.

[0018] A pusher is arranged on one side of the machine head, and an acceleration roller is arranged on one side of the pusher, and the acceleration roller is connected to the machine head.

[0019] A shell pulling hook is arranged on one side of the machine head, and the machine head is connected to a shell ejector, and the machine head is provided with a machine head on the side surface.

[0020] According to a further aspect of the present application, the shell pulling hook is a single shell pulling hook, and the shell ejector is an elastic shell ejector.

[0021] According to a further aspect of the present application, the machine head locking teeth in the machine head are designed as six evenly distributed teeth, and the machine head locking teeth adopt a composite opening and locking structure of spiral locking and acceleration sub-unlocking.

[0022] Compared with the prior art, the embodiment of the present application has the following beneficial effects:

[0023] The high-efficiency recoil device, the overall long recoil of the barrel and the automatic machine, the high-speed air resistance structure, the spring buffer and other forms are combined to achieve the purpose of greatly reducing the recoil force.

[0024] The total length of the gun is ≤1250mm, and the carrying length is ≤1050mm.

[0025] The weight is ≤11.9kg, including an empty cartridge case and excluding a sighting mirror.

[0026] The recoil force is about 52% of M99.

[0027] In order to more clearly illustrate the structural features and effects of the present application, the present application will be described in detail below with reference to the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structural schematic diagram of the embodiment of the application.

[0029] Figure 2 is an exploded view of the embodiment of the application. Figure 1

[0030] Figure 3 is a structural schematic diagram of the energy absorption module in the embodiment of the application.

[0031] Figure 4 is a structural schematic diagram of the barrel in the embodiment of the application.

[0032] Figure 5 is a structural schematic diagram of the automatic mechanism module in the embodiment of the application.

[0033] Figure 6 is a structural schematic diagram of the recoil brake in the embodiment of the application.

[0034] Figure 7 is a bore bottom resultant force-time curve of the 12.7mm rifle with the recoil brake in the embodiment of the application.

[0035] Figure 8 is a recoil resistance change curve after the combination in the embodiment of the application.

[0036] Figure 9 is a recoil force comparison test result of the present scheme (green curve) and M99 (red curve) in the embodiment of the application.

[0037] Figure 10 is an interior ballistic parameter (left: P-t / v-t, right: P-l / v-l graph) in the embodiment of the application.

[0038] Reference signs: 1-barrel assembly, 11-energy absorption module, 111-piston, 112-barrel return spring, 113-guide cylinder, 114-barrel, 2-automatic mechanism assembly, 3-launcher assembly, 31-recoil brake, 4-magazine assembly, 5-rifle tail assembly, 6-white light scope assembly, 7-breechblock return spring assembly, 8-chassis assembly, 81-automatic mechanism module, 811-hang-on mechanism blocking iron, 812-guide spring rod, 813-chassis head, 814-puller, 815-acceleration roller, 816-casing puller, 817-casing ejector, 818-breechblock handle. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0040] The specific implementation of the present application is described in detail below in combination with specific embodiments.​

[0041] In one embodiment, a LR2C type 12.7mm semi-automatic anti-equipment rifle, see Figures 1-10 , comprising a barrel assembly 1, the barrel assembly 1 is connected to an automatic assembly 2, the automatic assembly 2 is connected to a firing assembly 3, the firing assembly 3 is connected to a magazine assembly 4, the firing assembly 3 is provided with a magazine assembly 8, the magazine assembly 8 is connected to a bolt carrier spring assembly 7, the magazine assembly 8 is connected to a butt assembly 5, the magazine assembly 8 is connected to a white light scope assembly 6, further comprising:

[0042] An energy absorption module 11 is provided in the barrel assembly 1, the energy absorption module 11 adopts a mechanical ring flow piston structure, and the energy absorption module 11 is used to absorb the recoil energy;

[0043] A muzzle brake 31 is provided in the firing assembly 3, the muzzle brake 31 is provided with three chambers, and the muzzle brake 31 slows down the barrel recoil speed through reverse impact force; and

[0044] An automatic module 81 is provided in the magazine assembly 8, the automatic module 81 separates the automatic assembly and the barrel assembly and unlocks in the middle and rear section of the recoil stroke through the recoil process, and relies on the spiral cooperation to force the breechblock to be locked during the recoil.

[0045] Further, see Figures 1-10 , the energy absorption module 11 comprises:

[0046] A piston 111 is movably connected to a guide cylinder 113, and the guide cylinder 113 is connected to a barrel 114; and

[0047] A barrel return spring 112 is provided in the guide cylinder 113, and the barrel return spring 112 is connected to the piston 111.

[0048] Further, see Figures 1-10 , the barrel return spring 112 adopts a high-strength steel wire structure.

[0049] Further, see Figures 1-10 , the guide cylinder 113 is provided with an elastic buffer pad in front, and the elastic buffer pad is used to absorb the recoil energy.

[0050] Further, see Figures 1-10 , the automatic module 81 comprises:

[0051] A hanging machine resistance iron 811 is symmetrically provided on a guide spring rod 812, and the guide spring rod 812 is connected to a breechblock 813;

[0052] A pusher 814 is arranged on one side of the head 813, and an acceleration roller 815 is arranged on one side of the pusher 814, and the acceleration roller 815 is connected to the head 813.

[0053] A shell pulling hook 816 is arranged on one side of the head 813, and a shell throwing lever 817 is connected to the head 813, and the head 813 is arranged on one side of the head 813.

[0054] Further, referring to Figures 1-10 The shell pulling hook 816 is a single shell pulling hook, and the shell throwing lever 817 is an elastic shell throwing lever structure.

[0055] Further, referring to Figures 1-10 The head locking teeth in the head 813 are evenly arranged in six teeth, and the head locking teeth adopt a composite locking and unlocking structure of spiral locking and acceleration sub-unlocking.

[0056] In the embodiment, the shooting accuracy of the firearm is affected by multiple factors, but the recoil has a more prominent impact on the senses, especially the large-caliber sniper rifle, which is difficult to shoot and easy to cause the firearm to lose control during shooting, resulting in misalignment or off-target. The 12.7mm semi-automatic anti-material rifle of the present application adopts a structure combining high-efficiency recoil reducer 31, overall long-recoil of the barrel and the automatic mechanism, high-speed gas resistance structure, and spring buffer to achieve the purpose of significantly reducing the recoil.

[0057] According to the application experience of M99, the structural parameters affecting the efficiency of the recoil reducer 31 include the cross-sectional area of each chamber, the central hole, the half-cone angle of the central hole outlet, the outlet and inlet area of each side hole, the geometric axial angle of each side hole, the thickness ratio of the side hole, the inclination angle of the side hole inlet and outlet, etc. The recoil reducer 31 of the present application is designed with three chambers, and the front reflection plate of the chamber is inclined backward. When the projectile passes through, the chamber mouth gas is flowed backward from the reflection surface to the gun body, forming a reverse impact force to slow down the barrel recoil speed, thereby offsetting part of the recoil energy; the upper and lower reflection plates are inclined upward to suppress the upward jump of the muzzle. The recoil efficiency of M99 product test can reach 68%;

[0058] The barrel long-recoil automatic principle is adopted, and after the projectile is discharged, the barrel assembly and the bolt assembly form a combined body with a weight of 5.47 kg, which is recoiled by about 200 mm;

[0059] According to the interior ballistic data, the bottom force of the 12.7mm caliber rifle with the chamber mouth recoil reducer can be calculated. According to the simulation calculation results of M99 product using Matlab mathematical simulation software, the interior ballistic period and the bottom force curve of the aftereffect period can be obtained after excluding the influence of the gas guiding device;

[0060] According to the interior ballistic data, the total force at the breechblock of the 12.7mm caliber rifle with muzzle brake can be calculated. According to the results of the simulation calculation of the M99 product using Matlab mathematical simulation software, the total force curve at the breechblock during the interior ballistic period and the aftereffect period is removed after the influence of the gas guiding device.

[0061] Combined with the data, the impact force at the time of the recoil into place can be calculated from the speed and mass of the combination, which is about 1550N.

[0062] The energy absorption module 11 is based on the guiding structure of the long recoil principle of the barrel. By designing the front guiding mechanism of the barrel into a mechanical circulation piston structure, the high-speed movement of the barrel drives the piston to compress the air in the guiding cylinder, which plays the role of gas resistance spring buffer energy absorption. This gas resistance structure also has certain self-adaptive effect in high and low temperature environment: in high temperature environment, the barrel moves faster, and the gas in the cylinder is also compressed faster and more violently, consuming more energy; in low temperature environment, the barrel moves slower, and the gas in the cylinder is also compressed slower, consuming less energy.

[0063] In addition, the barrel return spring in the cylinder is designed with thick steel wire structure, and the front part of the guiding cylinder also increases the elastic buffer pad, which can also absorb the recoil energy and achieve certain buffer energy absorption effect.

[0064] To test the recoil reduction effect, the project team compared the recoil force of the sample gun with the existing M99 product in our factory. The comparison found that the peak value of the recoil force was reduced by more than 52% of the M99, and the recoil reduction effect was obvious. This proves that under the same conditions of firing the same bullets and the same total force at the breechblock, the combined effect of the recoil reduction mechanisms in the three ways of the scheme and the buffering effect of the thickened rubber shoulder support at the tail of the gun can significantly reduce the impact of the recoil force on the shooter.

[0065] The high-precision barrel and its guiding structure refer to the barrel structure of high-precision bolt-action sniper rifles, and combine the existing high-precision barrel manufacturing process to optimize the barrel. During the early development of related projects, the structure and process of high-precision barrels were tested and verified. The ballistic gun was used to shoot at a distance of 1500 meters with a dispersion density of ≤1MOA. When the sample gun with high-precision barrel was tested, the shooting dispersion density at a distance of 1500 meters was ≤1.2MOA, which was higher than the 1.6MOA of the M99.

[0066] From the tactical application of the sniper / anti-material rifle, both the first shot accuracy and the subsequent shot accuracy are actually strongly related to the consistency of the indexes such as the directionality, the initial speed jump, the flight stability and the like when the projectile flies out of the muzzle. The present scheme focuses on solving the problem of excessive recoil of 12.7mm caliber shooting, adopts the structure of floating barrel with long stroke reciprocating motion, and needs to focus on solving the adverse effects of the barrel long recoil guiding and reset structure on the shooting accuracy if the shooting accuracy is to reach the level of the structure of fixed barrel. Therefore, in addition to optimizing the barrel and guiding cylinder process technology and improving the manufacturing precision, the present scheme takes measures such as increasing the guiding support distance of the reset standby position, unifying the positioning reference of the guiding mechanism, and closing the guiding mechanism to reduce the pollution of the dust and sand environment to the guiding mechanism.

[0067] The present scheme adopts a barrel type guiding structure with a support length of 410mm and a length-diameter ratio close to 10:1, and the structural parts participating in guiding are simplified to 3, in order to improve the process of the guiding structure, the positioning reference is unified and is all cylindrical shape which is easy to process: the barrel and the piston as sliding bodies can be machined after fitting, the inner hole of the guiding cylinder as a fixed seat can be honed, and its coaxiality, straightness, cylindricity and other shape and position tolerances can be guaranteed without special process.

[0068] Under this condition, the project team analyzes the size chain of the guiding structure, even if the matching surfaces use φ42H7 / f7(0~+0.025 / -0.025~ -0.05), φ33H7 / f7(0~+0.025 / -0.025~ -0.05) with IT7 level precision, the maximum theoretical swing angle of the muzzle is 0.0209°, and the minimum is 0.007°, and the maximum impact on the accuracy index is 0.73MOA, and the minimum is 0.21MOA. And the above results are because the larger tolerance band is selected for easy control in batch production, and by relying on the existing process technology level of our factory, strengthening the internal control tolerance of the process or adopting the matching method, the maximum swing limit can be controlled in a relatively small range, and its impact can be controlled between 0.2~0.5MOA.

[0069] The receiver assembly 8 adopts a rotating bolt locking mechanism, and the automatic mechanism assembly is composed of a receiver head 813, a receiver body part, a pull handle 818, a pusher 814 and the like;

[0070] The bolt slides within the receiver via an upper guide rod and a rear cylindrical section of the bolt body. Its guiding structure is similar to that of the AK-47 rifle, featuring long guide support and ease of repair. The bolt head locking teeth are a six-tooth design, offering advantages such as a small locking angle, uniform locking support, and reliable strength. A composite locking and unlocking structure combining helical locking and accelerator unlocking is employed. This compact structure allows for unlocking by separating the automatic mechanism from the barrel assembly during the mid-to-late recoil stroke, or by forcing the bolt head to lock during return to its original position using the helical engagement.

[0071] This design employs a single extractor hook and a flexible ejector structure. When the bolt is held in place by the sear and the barrel is returning to its forward position, the spent cartridge case is extracted from the chamber and ejected to the right by the ejector spring. Compared to rigid ejection which relies on the speed of the automatic mechanism, this structure is simpler and more reliable. Since the bolt body of this design is relatively short and cannot completely press down the magazine inlet, a pusher is designed below the bolt. On the one hand, this extends the presser length so that the presser protrusion extends backward; on the other hand, to ensure that the magazine inlet position avoids the barrel extension during recoil, the pusher tooth is designed with an additional elastic structure to facilitate its insertion into the magazine and eject the cartridge case.

[0072] As the feed lever pushes the bullet forward, the tail of the bullet disengages from the magazine catch as soon as the tip enters the chamber. It is then lifted by the follower spring and pressed into the chamber by the bolt head to prevent deformation of the bullet during the feed path. However, to prevent abnormal situations, a slope is still designed in the barrel extension and the barrel feed path to facilitate feeding.

[0073] The launch mechanism in a bullpup layout places the launcher at the front of the magazine. Typically, this design uses a trigger-link mechanism for control because the hammer and hammer spring are located at the rear. This design employs a direct-control mechanism to improve sensitivity.

[0074] The hammer is positioned on the left side of the receiver to avoid obstructing the magazine and shorten the overall length of the rifle. The firing and single-shot actions are achieved by controlling the slider at the end of the hammer spring rod via the sear and single-shot sear. When the bolt recoils and knocks down the hammer, the slider moves forward and is engaged by the sear. When the trigger is pulled, the firing lever is pushed backward, causing the sear and single-shot sear to rotate together. The sear disengages from the slider, releasing the hammer to strike the firing pin and fire. When the trigger is held down, the bolt recoils again and knocks down the hammer. At this time, the single-shot sear rises while the single-shot sear descends, and the slider is engaged by the single-shot sear, preventing firing. Only by releasing the trigger can the single-shot sear disengage from the slider under the action of the firing lever. Simultaneously, because the sear and single-shot sear move in opposite directions and have a certain overlap, the single-shot sear rises during disengagement and re-engages with the slider, requiring the trigger to be pulled again to fire again, thus achieving the single-shot firing function.

[0075] The transmitter of the scheme reserves space before and behind the firing rod, facilitates to add and modify electric servo firing device, the cooperation gap between trigger and firing rod can be adjusted, and the sensitivity of trigger and trigger pre-press stroke are adjusted conveniently.

[0076] The above merely describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An LR2C type 12.7mm semi-automatic anti-materiel rifle, comprising a barrel assembly connected to an automatic mechanism assembly, the automatic mechanism assembly connected to a firing mechanism assembly, the firing mechanism assembly connected to a magazine assembly, a receiver assembly disposed on the firing mechanism assembly, the receiver assembly connected to a bolt recoil spring assembly, the receiver assembly connected to a breech assembly, and the receiver assembly connected to a white light sight assembly, characterized in that, Also includes: An energy-absorbing module is disposed within the barrel assembly. The energy-absorbing module adopts a mechanical annular piston structure and is used to absorb recoil energy. A muzzle brake, disposed within the transmitter assembly, comprising three chambers, reduces the recoil velocity of the barrel through a reverse impact force; and An automatic mechanism module, disposed within the receiver assembly, unlocks by separating the automatic mechanism module from the body assembly during the middle to later stage of the recoil stroke, and locks the bolt head by means of a screw engagement during the return stroke. The energy absorption module includes: Piston, the piston being movably connected to a guide cylinder, the guide cylinder being connected to a barrel; and A barrel recoil spring is disposed inside the guide cylinder and is connected to the piston; The automaton module includes: A hanging stop iron is provided, which is symmetrically arranged on a guide spring rod, and the guide spring rod is connected to the machine head. A pusher for ejecting projectiles, wherein the pusher for ejecting projectiles is disposed on one side of the machine head, and an acceleration roller is disposed on one side of the pusher for ejecting projectiles, the acceleration roller being connected to the machine head; and A shell-pulling hook is provided on one side of the machine head, the machine head is connected to a shell-throwing tool, and a machine head is provided on the side of the machine head; The shell puller is a single shell puller, and the shell ejector is an elastic shell ejector structure. The locking teeth inside the machine head are designed with six teeth evenly distributed, and the locking teeth adopt a composite locking and unlocking structure of helical locking and accelerator unlocking.

2. The LR2C type 12.7mm semi-automatic anti-materiel rifle according to claim 1, characterized in that, The barrel recoil spring is made of high-strength steel wire.

3. The LR2C type 12.7mm semi-automatic anti-materiel rifle according to claim 2, characterized in that, An elastic buffer pad is provided in front of the guide cylinder to absorb recoil energy.

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