RU105979U1 - AUTOMATIC WEAPON STEM GROUP - Google Patents

Abstract

 An automatic weapon containing a receiver group installed in the casing and consisting of a barrel and a receiver, characterized in that the receiver has guides, the supporting surfaces of which are located in a horizontal plane passing through the axis of the barrel channel, and in the case there are grooves corresponding to shaped guide rails receiver.

Description

The utility model relates to firearms, in particular to the design of small automatic weapons.

Famous counterparts are artillery weapon systems that have a gun mount and a movable barrel group with a barrel locking mechanism, such as a howitzer, cannon and others.

In world practice, the production and use of small arms, this layout scheme, in addition to the prototype, has no analogues.

The closest technical solution, selected as a prototype, is the Nikonov assault rifle AN-94, which consists of a casing and a firing unit moving inside the casing (RF patent for the invention No. 2110745).

The disadvantage of the machine AN-94 is the increased vertical dispersion, which occurs as a result of transverse vibrations of the axis of the bore and angular displacements of the muzzle of the barrel at the time of the shot. During the shot, a bending moment arises that negatively affects the accuracy of the firing of the machine due to the presence of a shoulder of 18.5 mm between the axis of the bore and the supporting surface of the firing unit, which consists of a barrel, receiver, gas chamber, roller case, muzzle brake, and aiming devices, percussion, sucking, buffer and locking mechanisms.

The objective of the utility model is to increase the accuracy of firing of the AN-94 assault rifle. The technical result consists in reducing the transverse vibrations of the axis of the bore and turning the muzzle in the vertical plane at the time of the shot.

This object is achieved by the fact that on the receiver are made guides, the supporting surfaces of which are located in a horizontal plane passing through the axis of the barrel channel, and in the casing grooves are made corresponding in shape to the guides of the receiver.

Figure 1 shows a General view of an automatic weapon; figure 2 - diagram of the fixing of the receiver group; figure 3 - test results, commercially available machine AN-94; figure 4 - test results of automatic weapons of the proposed design.

An automatic weapon comprises a casing 1 made of metal or plastic, a power mechanism in the form of a magazine 2 fixed on the casing 1, an angular displacement device 3 of the barrel group, consisting of a guide element 4 and a support base 5. The guide element 4 is mounted on the casing 1 (Fig. 1) or on the receiver group 6 (Fig. 3), and the support base 5 on the receiver group 6 or on the casing 1.

In the casing 1, a barrel group 6 is installed, consisting of a barrel 7 and a receiver 8. The barrel group 6 has the possibility of reciprocating movement, relying with two guides 9 of the receiver 8 on the longitudinal guide grooves 10, while the support base 5 moves along the guide element 4 The barrel group 6 is spring-loaded with a return spring 11. In the muzzle of the barrel 7 there is a muzzle device 12 with an expansion chamber 13, an exhaust chamber 14, a bullet hole 15. A gas engine 1 is installed on top of the barrel 6, comprising a gas chamber 17, a piston 18, a gas vent 19, and gas vents 20. In the receiver 8, a shutter 21 with a striker 22 and a shutter frame 23 with a return spring 24 are movably mounted.

The impact mechanism 25 includes a movable trigger 26 with a combat spring 27. The trigger 26 is mounted on the guides 28 of the receiver 1.

The sear 29 is made in the form of a one-armed lever, spring-loaded with a spring 30. One end of the lever is mounted on the axis 31, the other end is equipped with a spring-loaded spring 32 finger 33.

The trigger 34 includes the axis of the trigger 35, the trigger 36, constantly interacting with the disconnector 37.

The latter is installed with the possibility of reciprocating movement and rotation on the longitudinal axis 38, is spring-loaded with a spring 39 and is equipped with a long copier 40, a short copier 41, the copy surfaces of which are offset relative to each other.

The automatic weapon is equipped with a means of supplying 42 cartridges to the chamber, consisting of a spring 43 moving along the guides 44 of the pusher 45, kinematically connected, for example, by a flexible connection 46 via a roller 47 with a shutter frame 23, of an intermediate chamber 48 with a groove 49 for a releasing protrusion.

The device operates as follows.

For loading, the bolt frame 23 is retracted, while through a flexible connection 46 it pulls the pusher 45 forward, and it pushes the upper cartridge from the magazine into the intermediate chamber 48 and sets it in front of the shutter 21. The cocking cock of the trigger 26 rises behind the ledge of the whisper 29.

The bolt frame 23, under the action of the return spring 24, moves forward, the bolt 21 with the extension protrusion captures the extended cartridge, moves along the groove 49 of the cartridge chamber 48 and sends the cartridge to the barrel chamber 7.

The shutter frame 23 interacts with the shutter 21 and the barrel is locked.

The pusher 45 under the action of the spring 43 returns to its original position.

Trigger 26 is held by a ledge for the platoon of whispered 29. The weapon is ready to fire.

Shooting with automatic fire in a continuous burst.

The disconnector 37 is installed so that the finger 33 is located under the long copier 40 and under the short copier 41, being in direct contact only with the long copier 40.

When you press the trigger 36, he turns on the longitudinal axis 38 disconnector 37, with a long copier 40 acts on finger 33 and whispers.

The sear turns, the ledge disengages from the cocking cock 26 and releases it.

Trigger 26 under the action of the mainspring 27 moves forward and strikes the hammer 22, the first shot occurs.

After the shot, the bullet passes through the bore of the barrel 7 past the gas outlet 20, and the powder gases expanding through the gas outlet 20 and gas outlet 19 enter the gas chamber 17 and move the piston 18 with the bolt frame 23 and the trigger 26 back. In this case, the rear protrusion of the trigger 26 enters the groove of the bolt frame 23 and engages with it, at the same time the barrel is unlocked, the shutter 21 removes the sleeve. The sleeve, meeting with the reflector on the receiver 8, is removed from the weapon.

After hitting in the rear position, the bolt frame 23, coupled with the trigger and the bolt 21 under the action of the return spring 24 and the mainspring 27 is rolled forward and produces a second shot. Trigger 26, moving forward without stopping, reduces the time between shots and a high rate of fire.

The dispatch of the cartridge into the chamber occurs as in the case of manual reloading.

During the shot as a result of the pulse of the cartridge directed along the axis of the bore of the barrel, the barrel group 6 moves along the guide grooves 10. Due to the fact that the plane of interaction of the guides 9 and the guide grooves 10 coincides with the axis of the barrel 7, no bending occurs at the time of the bullet moment, which significantly reduces the rotation of the barrel in a vertical plane and leads to an increase in the accuracy of fire.

Having received an impulse from the second shot, the barrel group 6 continues, and the bolt frame 23 with the trigger 26 begins to move backward, the sear 29 continues to be held by a long copier 40 and disconnector 37 by finger 33.

At the end of the rollback of the barrel group 6, after the second shot, the finger 33 comes off the long copier 40, rises with the sear 29 under the action of the spring 30.

When rolling, the trigger 26 interacts with the copy surface with a ledge on the sear 29, removes the protrusion from the groove in the plate of the bolt frame 23 and stops the cocking on the ledge.

The bolt frame 23 with the shutter 21 completes the chambering of the cartridge into the chamber.

The barrel group 6 after the second shot under the action of the spring 11 moves forward.

Shooting with automatic fire from a high pace to low.

Finger 33, moving forward with the receiver group 6, interacts with the short copier 41 of disconnector 37 and turns the sear 29.

The trigger 26 disengages from the sear 29 and strikes the hammer 22, a third shot occurs.

The receiver group 6 begins to move backward, finger 33, having left the interaction with the short copier 41, rises with the sear 29 under the action of the spring 30.

The shutter frame 23 with the shutter 21 also rolls back.

At the beginning of the rolling shutter frame 23 in the middle position, the trigger 26 stops at the sear 29.

After the second shot, finger 33 interacts only with the short copier 41 and, under the action of the spring 32, contacts the lateral surface of the long copier 40. The short length of the short copier 41 causes the finger 33 to stop interacting with it and rise together with the sear 29 at the beginning of the rollback rollback 6 until the bolt frame 23 with the trigger 26 rolls back to the rear position. Therefore, at the beginning of the rolling shutter frame 23, the trigger 26 stops on the sear 29 in the rear position. There is a time of "waiting" until the trigger 26 is pulled off from whisper 29, until the barrel group 6 rolls back from the previous shot and, having rolled forward, provides, through the interaction of finger 33 with the short copier 41, the whispered 29 is rotated and the trigger 26 is broken. This increases the time between shots , the rate of fire after the second shot becomes low.

The cycles are repeated.

Thus, the weapon shoots until the trigger 35 is pressed. When released, its disconnector will turn under the action of the spring 39, finger 33 with sear 29 will rise, trigger 26 will stop at sear 29, shooting will stop.

To continue shooting, you need to press the trigger 35 again and two high-rate shots will take place, the subsequent low-speed shots.

A positive effect is achieved by the fact that the guiding surfaces of the firing unit are located horizontally and are in the same plane with the axis of the barrel channel, thereby eliminating the bending moment arm. This installation scheme of the barrel group in the casing eliminates the appearance of a bending moment and significantly reduces the movement of the muzzle at the time of the shot in the vertical plane. The proposed design of automatic weapons allows to improve the accuracy of firing automatic machine 2.5 times the magnitude of the transverse dispersion (figure 3; figure 4), which was confirmed by comparative tests conducted on a prototype.

Claims (1)

An automatic weapon containing a receiver group installed in the casing and consisting of a barrel and a receiver, characterized in that the receiver has guides, the supporting surfaces of which are located in a horizontal plane passing through the axis of the barrel channel, and in the case there are grooves corresponding to shaped guide rails receiver.