RU2529303C2 - Barrel bore lock system - Google Patents

Abstract

FIELD: weapons and ammunition.

SUBSTANCE: invention relates to firearms. Barrel bore lock system comprises breech frame, breechblock composed by front and rear bulky parts connected by the lever. Breechblock consists of four rectangular different-length levers arranged inside breech frame and articulated by three pins. Two extreme levers are located at one straight line while two mid levers are shifted downward, inside breech block chamber, and retained therein by return spring.

EFFECT: higher reliability, ruled out fouling of the gun in operation.

4 dwg

Description

There is a known system for locking the barrel in the machine gun of the Federal Republic of Germany “Heckler and Koch” NK 21 (NK 23), which is based on the recoil of a half-free shutter, consisting of two parts and accelerating rollers [Murakhovsky V.I., Fedoseev S.L. Weapons of infantry. - M .: Arsenal-Press, 1997. - p.295]. This principle of locking is also used in the Spanish assault rifle CETME models A, B (58), C and E [Murakhovsky V.I., Fedoseev S.L. Weapons of infantry. - M .: Arsenal-Press, 1997. - p.186], as well as in the Swiss ZIG assault rifle SG 510-4 [Murakhovsky V.I., Fedoseev S.L. Weapons of infantry. - M .: Arsenal-Press, 1997. - p.239].

A common disadvantage of this locking system is:

- a small distance (about 4 ml), at which the shutter skeleton is accelerated;

- high sensitivity to clogging of the locking device.

In the Kalashnikov assault rifle, the barrel bore is locked by turning the bolt, while two bolt engagements extend into the corresponding grooves of the receiver. Unlocking the shutter is made by the bevel of the shutter frame. Automation operates due to the removal of powder gases through a side hole in the wall of the barrel [Murakhovsky V.I., Fedoseev S.L. Weapons of infantry. - M .: Arsenal-Press, 1997. - p. 191]. The disadvantage of this locking system is:

- enhanced recoil due to the movement of the slide frame back;

- withdrawal from the aiming point when firing bursts.

In the heavy machine gun "Browning" M2NV [Murakhovsky V.I., Fedoseev S.L. Weaponry infantry. - M.: Arsenal-Press, 1997. - p.291] the barrel locking system works on the principle of rolling the barrel back with the bolt engaged together, after which the locking lever rotates on the axis under the action of moving parts and disengages the bolt with the barrel. The long arm of the lever gives the skeleton of the shutter a greater recoil speed.

The disadvantage is:

- significant weight (66 kg).

The closest (prototype) to the present invention is a locking system used in the French single machine gun N AAT mle F1 [Murakhovsky V.I., Fedoseev S.L. Weapons of infantry. - M .: Arsenal-Press, 1997. - p. 293].

The operation of the weapon is carried out on the principle of recoil of a half-free shutter. The chamber has several Rivelli longitudinal grooves half the length of the sleeve. Gunpowder gases enter these grooves and the sleeve, as it were, “floats” in the chamber due to equal pressure acting on the walls of the sleeve from the outside and from the inside. Therefore, the sleeve can move relatively freely.

The front part of the shutter (mask) is connected to the shutter skeleton by a lever, the short part of the lever is in the side cutout of the receiver, and the long one is against the massive back part of the shutter. Under the influence of the pressure of the powder gases, the lever moves and transfers acceleration to the shutter skeleton until the lever comes out of the groove. Then the entire shutter is thrown back due to the residual pressure. The disadvantage of this locking system is:

- a small distance at which the shutter skeleton is accelerated;

- the only lever experiences high stresses at the time of the shot, which leads to wear of the locking unit;

- the gap between the gate mirror and the bottom of the cartridge case requires constant adjustment during operation, otherwise, if it is violated, the cartridge breaks.

The technical result when using the invention is:

- improving reliability by simplifying the design;

- eliminates rupture of the sleeve;

- all openings of the receiver are closed, which eliminates the possibility of clogging weapons;

- the shutter body receives greater acceleration due to a change in design;

- there is no need to use Rivelli grooves in the chamber;

- the location of the shutter handle on top of the receiver makes it convenient to use weapons for lefties and righties.

The technical result is achieved by the fact that the bolt consists of four rectangular levers of different lengths, movably connected by three axes located inside the receiver, the two extreme levers being on one straight line, and the two middle levers shifted down, located inside the receiver’s pocket and held there spring force.

Figure 1 shows a General view of the weapon, which uses the proposed device for locking the channel of weapon barrels. Shown is barrel 1, receiver 2, sight 3, magazine 4, handles for holding 5, handle for jerking the shutter 6, shoulder rest (back plate) 7.

Figure 2 shows the receiver in the context. At the bottom of the receiver there is a pocket. Inside the receiver are four rectangular levers, movably connected by three axes A, B, C:

8 - shutter mask;

9 - thrust lever for locking;

10 - lever connecting the stop lever with the shutter skeleton;

11 - shutter skeleton, the most massive part of the shutter, inside which is located a return spring and a shock absorber.

In the guise of the shutter 8 is placed drummer 12. The locking lever 9 is located in the pocket of the receiver and is connected by the axes A and B with the levers 8 and 10. On the lever 10 there is a handle 6 for jerking the shutter. The lever 10, as well as the lever 9, is in the pocket of the receiver. Also shown is barrel 1, receiver 2, magazine 4, and a handle for holding and controlling fire 5.

Figure 3 shows the shutter in the open state. Shown: levers 8, 9, 10, 11, connected by axes A, B, C. Also shown: barrel 1, receiver 2, magazine 4, handle for holding 5, handle for jerking the shutter 6, drummer 12.

Figure 4 shows the shutter skeleton in the context: levers 9, 10, 11, handle for juggling 6, axis B, C. At the end of the shutter skeleton, a shock absorber 13 is installed. Inside the skeleton there is a return spring 14 with a guide rod 15 and an eccentric 16.

We take the weapon in hand and pull the handle for juggling 6 back. In this case, the lever 10 will be rotated around the C axis, since it was held in the receiver pocket by a return spring 14. In this case, the B axis connecting the levers 9 and 10 and located in the receiver pocket will rise up and raise the lever 9 and 10, while the levers 9 and 10 will not occupy a horizontal position. Thus, the shutter is unlocked. After that, the return spring 14 and the levers 8, 9, 10, 11, located on one straight line, begin to move back to the butt plate of the butt 7 and the trigger is cocked in the trigger mechanism from the effort of the hand. When releasing the handle 6, the return spring 14, which abuts against the butt plate 7 with one end and presses the lever 10 with the other end eccentric 16, starts to move the bolt, consisting of four levers, forward. In this case, mask 8 will remove the cartridge from the magazine 4 and send it to the chamber.

The length of the mask 8 is 1.5 times the length of the ammunition, since the trigger moves in the back of the mask, which strikes the hammer 12.

The length of the lever 10 determines the angle of locking of the lever 9 and distributes the pressure of the thrust lever to the supporting surface inside the pocket of the receiver.

The skeleton of the shutter 11 is the longest and most massive part of the shutter, inside of which there is a return spring 14 with a guide rod 15, and at the end of the skeleton there is a shock absorber 13.

When you press the trigger and the destruction of the capsule by the hammer 12, the pressure of the powder gases will act on the mask 8, which receives the pressure of the powder gases and transfers it to the stop lever 9, located in the pocket of the receiver. This pressure is perceived by the inclined support surface in the pocket of the receiver. Thus, the shutter is locked.

Due to the pressure of the powder gases, the lever 10, located in the pocket of the receiver, begins to slide along the inclined support surface of the receiver, is pressed against it by the pressure of the powder gases, pushes the skeleton of the bolt 11 back and compresses the return spring 14. As a result of the pressure of the powder gases, axes A and C will move apart in different directions, and the B axis will rise up. The shutter remains locked until levers 9 and 10 are horizontal.

During the lifting of the axis B upward, the shutter body 11 is accelerated to roll back, while the mask 8 is held in place by the stop lever 9. As soon as the levers 9 and 10 are horizontal, the shutter will unlock and roll back due to the residual pressure of the powder gases . The skeleton of the shutter 11 rests against the back plate 7 against the shock absorber 7 and stops. The cycle repeats.

Claims (1)

A weapon barrel locking system having a receiver, a bolt consisting of front and rear massive parts connected by a lever, a shock absorber, characterized in that the bolt consists of four rectangular levers of different lengths, movably connected by three axes located inside the receiver, and two extreme levers are on one straight line, and two middle levers are shifted down, are inside the receiver pocket and are held there by the force of a return spring.

Images