RU2237839C1 - Pressure abd gas cut-off control mechanism of automatic weapon - Google Patents

Abstract

FIELD: weaponry, in particular, gas pressure control mechanisms of automatic weapon.

SUBSTANCE: the cut-off valve of the pressure and gas cut-off control mechanism, having a cylindrical shape with a circular groove in the outside diameter and holes for passage of powder gases, is tightened in the initial position to a supporting bushing. The gas-discharge hole and the drain hole are made in the body with a shift relative to each other.

EFFECT: enhanced operating characteristics of the weapon.

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Description

The invention relates to weapons technology, and in particular to mechanisms for adjusting the gas pressure of automatic weapons, which automatically adjusts the piston speed to the required value when firing cartridges that create various pressures in the barrel channel, and also allows to reduce gas pressure losses in the barrel channel.

The known mechanism for adjusting the gas pressure of the gun “Beretta AL391” (see the catalog of the company “Beretta”, 2003, p. 22), comprising a gas cylinder, a gas chamber, a piston with a rod. The valve is made in the form of a flat disk, and the emphasis with which the valve spring interacts is in the form of a nut screwed onto the tide of the gas cylinder body.

A disadvantage of the known mechanism is that when the valve is open, the gas outlet from the bore is not blocked, which leads to a significant loss of pressure of the powder gases in the bore.

There is also a known mechanism for adjusting the gas pressure (see patent No. 2164334, RU, F 41 A 5/28), comprising a gas cylinder with a piston and a rod passing through a central hole in the front wall of the gas cylinder. In the gas outlet chamber, a valve is installed having a conical shape and provided with an obturating ring. The spring abuts against the valve at one end and the centering element at the other.

A disadvantage of the known mechanism, taken as a prototype, is that when the valve is open, the gas outlet from the bore is not blocked, which leads to a significant loss of pressure of the powder gases in the bore.

An object of the invention is the creation of a technologically advanced, efficient weapon of a rifle squad having high reliability and durability.

The technical result that provides a solution to the problem is to maintain a stable shutter speed and reduce the pressure drop of the powder gases in the bore due to the simultaneous discharge of gases into the atmosphere through the openings in the shut-off valve and the casing and blocking the gas outlet from the bore.

The specified technical result is achieved by the fact that in the mechanism for adjusting the gas pressure of an automatic weapon comprising a housing, a gas chamber with a piston and a rod, a spring centering nut and a shut-off valve, a gas outlet and a discharge hole are made in the housing with an offset relative to each other, and the shut-off a valve having a cylindrical shape with an annular groove in the outer diameter and openings for the passage of powder gases is pressed against the support sleeve in such a way that the gas outlet is combined in the initial position one hole from the bore and holes for the passage of gases in the shut-off valve.

Using the claimed invention allows to maintain a stable shutter speed, providing reliable and durable operation of the weapon. The operational characteristics of the weapon are increased due to the fact that the overlapping of the gas outlet from the barrel channel allows to reduce the pressure drop of the powder gases in the barrel channel.

The invention is illustrated by drawings, which depict:

figure 1 is a General view of the device in section with a closed discharge hole and an open gas outlet from the barrel;

figure 2 is the same, with the open discharge hole and the closed gas outlet from the bore.

The mechanism comprises a housing 1 (Fig. 1), a gas chamber 2 with a piston 3 and a rod 4. A support sleeve 5 is mounted on the rod 4, against which a centering nut 6 rests. A shut-off valve 7 having a cylindrical shape with an annular groove is located in the gas chamber 2 along the outer diameter and openings 9 for the passage of gases, which is pressed by the spring 8 to the support sleeve 5. The spring 8 rests against the centering nut 6. The housing 1 has a discharge opening 10, which serves to discharge gases into the atmosphere, and a gas outlet 11, which serves for removal of g call from the bore.

The mechanism works as follows. After the shot, powder gases from the bore through the gas outlet 11 and openings 9 in the shut-off valve 7 enter the gas chamber 2, creating pressure in it transmitted to the piston 3 and the shut-off valve 7. The piston 3 starts its movement. When the pressure of the powder gases reaches a value greater than the force of the spring 8, the gases press the shut-off valve 7 from the support sleeve 5, (FIG. 2) opening the discharge hole 10. Gases through the openings 9 in the shut-off valve 7 and the discharge hole 10 are released into the atmosphere. At the same time, gases are cut off from the bore, since the gas outlet 11 is blocked from the bore, reducing the pressure drop in the bore. Piston 3, having received sufficient momentum, moves at a speed that ensures reliable and durable operation of the weapon, because the values of the speed of the piston 3 during each shot differ little from each other when firing cartridges that create different pressures of the powder gases in the bore.

Claims (1)

A mechanism for adjusting the pressure and gas cut-off of an automatic weapon, comprising a housing, a gas chamber with a piston and a rod, a spring, a centering nut and a shut-off valve, characterized in that the shut-off valve having a cylindrical shape with an annular groove in the outer diameter and openings for the passage of powder gases, preloaded in the initial position to the support sleeve, and the gas outlet and the discharge hole are made in the housing with an offset relative to each other.

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