RU2229078C1 - Gas regulator of recoil speed of weapon breechblock - Google Patents

Abstract

FIELD: weaponry, applicable in self-loading weapon. SUBSTANCE: the gas regulator of weapon breechblock recoil speed has a gas chamber connected to the bore by means of a gas vent with a hole for disposal of gases, with a spring-loaded gas valve. The novelty is in the fact that the gas chamber is made detachable and installed on a "dovetail" boss, and the plate spring is secured by a screw joint for installation of an adjusting washer. The gas chamber is made with two gas vents symmetrically located valves. Besides, this gas valve is made for self-adjustment in the hole for disposal of gases. EFFECT: provided assembly and disassembly of the device in the field conditions without special tools. 4 cl, 3 dwg

Description

The invention relates to the field of weapons technology and can be used in self-loading weapons.

A device is known for a gas regulator of the recoil speed of the moving parts of the shutter, implemented in a Beretta AL390 shotgun (see SAFARI magazine No. 1 (2), Winter 2000, p. 98, 99), containing a gas cylinder with exhaust openings for discharging gases, connected to the bore of the barrel by means of a gas outlet channel, a valve spring-loaded with a cylindrical spring locked by a cap.

A disadvantage of the known device is the excessive complexity of its manufacture.

The closest in technical essence to the proposed one - the prototype is a gas regulator for the recoil speed of the moving parts of the MP-153 rifle (see passport for the self-loading hunting rifle MP-153, release date 12/22/00, p. 5-7, Fig. 2) comprising a gas chamber fixedly attached to the barrel, connected to the bore by means of through holes, and having grooves in the body for venting gases, an annular valve spring-loaded with a coil spring that is locked with an annular nut.

The known device allows you to adjust (limit) the speed of movement of the moving parts of the shutter when using charges of increased power due to the fact that during the shot under the influence of gas pressure, the annular valve moves, compressing the spring, and opens the grooves in the body of the gas chamber through which the discharge of combustion products outward, providing relief of excess pressure in the chamber.

A disadvantage of the known device is its lack of operational reliability caused by the inconvenience of servicing the known device, in particular periodic cleaning and adjustment of parameters, which, in turn, is impossible without disassembling the device. Since the disassembly and assembly of the known device requires the use of special devices, in most cases inaccessible to the owner of the weapon, a gradual accumulation of soot occurs, partially closing the grooves in the gas chamber body, as a result of which the gas discharge occurs at a different, higher pressure, which causes an increase in speed shutter recoil, its instability, and therefore, earlier wear of parts.

The objective of the invention is to increase the operational reliability of the device.

The technical result is the ability to disassemble and assemble the device in the field, without special tools.

To solve the problem of the invention, in the gas regulator, the recoil speed of the moving parts of the bolt of the weapon, including a gas chamber connected to the barrel via a gas outlet, with a gas vent, a spring-loaded valve, the gas chamber is removable and mounted on a dovetail protrusion and the spring is made of leaf.

Moreover:

- the spring is fixed to the gas chamber using a screw connection, with the possibility of installing an adjusting washer,

- the gas chamber is made with two side holes symmetrical with respect to the vertical plane for venting gases in which two spring-loaded valves are installed,

- the gas valve is made with the possibility of self-installation in the hole for the discharge of gases.

The invention is illustrated using the drawings, in which Fig. 1 shows the construction of a gas regulator for the recoil speed of an assembled weapon shutter, in Fig. 2 is a cross section of a gas chamber, in Fig. 3 is a separate construction of a valve with a leaf spring.

The gas regulator of the recoil speed of the shutter of the weapon includes a gas chamber 1 (Fig. 1), with openings 2 (Fig. 2) for gas discharge, located symmetrically relative to the vertical axis 3, into which gas valves 4 are installed, spring-loaded with a leaf spring 5. Gas chamber 1 made removable, mounted on a dovetail protrusion 6 and connected to the channel 7 of the barrel 8 by means of a gas outlet 9. The springs 5 are fixed using a screw connection 10, with the possibility of installing adjusting washers 11. The holes 2 are located in the oic pillow 12 1. Within the gas chamber of the gas chamber 1 is mounted a piston 13 movable, that interacts with the slide frame (not shown). The screw connection 10 is made with the head 14 for a screwdriver. The gas valve is installed by the neck 15 in the hole of the spring 5 and is made with the possibility of self-installation in the hole 2 for the discharge of gases.

Gas regulator speed recoil shutter weapons works as follows.

The parameters of the spring 5 are selected from the calculation of the reliable operation of the shutter when using a cartridge with the smallest possible charge power, for example sports cartridges with a shot of 24 g fractions, which, when fired, creates a certain nominal pressure in the gas chamber. A charge of this power provides the necessary and sufficient speed for the rollback of the moving parts of a self-loading rifle for its normal reloading in a given temperature range.

At the same time, situations of using cartridges of much greater charge power, for example, Magnum cartridges, with a portion of 46 g.

Reducing the effect of increased charge power on increasing the recoil speed of the moving parts of the shutter, leading to premature wear of the weapon, provides a gas regulator for the recoil speed of the shutter of the weapon by relieving excessive pressure through the holes 2 in the gas chamber 1. So, at the time of the shot due to the presence of a gas outlet 9 the zone of the gas cushion 12 of the gas chamber 1 increases sharply, reaching a certain nominal value, ensuring the normal operation of the shutter. If the pressure in the gas chamber continues to increase and exceeds the nominal value, then the leaf spring 5 bends and the valve 4 opens. Part 2 of the propellant combustion products leaves the hole 2, as a result of which the pressure no longer increases, and the shutter recoil speed remains the same.

During the operation of the gun, the openings of the gas chamber and the surface of the valves are contaminated by the remains of the combustion products of the powder, which can lead to a loose fit of the valves and the formation of gaps. To clean the elements of the device from soot, remove the chamber 1 from the protrusion 6, after which, acting on the head 14 with a screwdriver or other improvised tool with a flat edge, unscrew the screw of the screw connection 10 and remove the springs 5 with valves 4.

Self-installation of the gas valve is achieved due to the fact that the neck of the valve 4 has a smaller diameter than the corresponding opening of the spring 5, so that there is the possibility of some movement or self-installation of the valve 4 in the plane of the spring 5. When closing the hole 2 with the valve 4 under the action of the spring 5, the valve 4 self-install, i.e. occupies a position in the center of the hole 2, tightly closing the latter.

During long-term operation of the weapon, for example, after 3 thousand shots, the shutter parts are run-in in-between, leading to its easier operation by reducing the required effort to roll back its moving parts.

Under these conditions, at the previous value of the opening pressure of the valves 4, the rollback speed becomes higher, causing accelerated wear of parts.

To reduce the effect of running-in of moving parts on the rollback speed, the valve clamp is weakened by installing shims 11 of calibrated thickness between the spring and the wall of the gas chamber.

At the same time, the opening pressure of the valves decreases, as a result of which the rollback speed remains the same.

The proposed gas shutter speed regulator has a higher operational reliability in contrast to the prototype, as it provides free access to the elements of the device for periodic cleaning of weapons, easy disassembly and assembly without special tools, even in the field, as well as the ability to adjust compensating running-in of moving parts, which allows you to quickly eliminate the causes of abnormal increase in the speed of rollback and ultimately increases the life of the weapon.

Claims (4)

1. Gas regulator of the speed of recoil of the bolt of the weapon, including a gas chamber connected to the bore via a gas outlet, with a gas vent, with a gas valve, spring-loaded spring, characterized in that the gas chamber is removable and mounted on a dovetail protrusion "and the spring is plate-like. 2. The gas regulator according to claim 1, characterized in that the spring is fixed by means of a screw connection with the possibility of installing an adjusting washer. 3. The gas regulator according to any one of claims 1 and 2, characterized in that the gas chamber is made with two openings symmetrically arranged relative to the vertical plane for venting gases with spring-loaded valves installed therein. 4. The gas regulator according to any one of claims 1 to 3, characterized in that the gas valve is configured to self-install in the gas outlet.

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