RU2625473C1 - Fire weapon - Google Patents

Abstract

FIELD: weaponry and ammunition supplies.

SUBSTANCE: fire weapon comprises a barrel, a firing mechanism housing, a separable fore-end and a linear underreaming off-set mechanism. A linear underreaming off-set mechanism is designed as a fixedly attached to a fore-end U-shaped basement with lugged side panel and with the bead flange at the front. The lugs are housed within the leading slots on the firing mechanism housing, and the bead flange has a hole in order to place there an exposed end of a driving rod, with the other end attached to the firing mechanism housing. There is a coiled spring placed in the driving rod. One end of the spring bumps into the firing mechanism housing, and the other - into the U-shaped basement.

EFFECT: improving accuracy of fire and weaponry design simplification.

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Description

The invention relates to the field of weapons technology and can be used in firearms.

Famous AK Kalashnikov assault rifle (Manual on small business. 7.62 mm Kalashnikov assault rifle (AK). M: Military Publishing House of the USSR Ministry of Defense, 1957). The machine has a detachable forend, which is attached to the barrel using a coupling and to the receiver - by means of a connecting pad and a protrusion included in the receiver of the receiver.

A disadvantage of the known device is that when heated during firing due to the linear expansion of the barrel, a gap appears between the coupling and the forend, which reduces the accuracy of shooting. When changing the humidity of the forend wood (getting wet / drying), the dimensions of the protrusion included in the receiver’s nest change, which also affects the accuracy of the fire.

Known sniper rifle Dragunov SVD (Manual on small arms. 7.62 mm. Sniper rifle Dragunov (SVD). M: Military Publishing of the Ministry of Defense of the USSR, 1988; From the history of weaponry: Collection of articles: special issue. / BUK and DO UR " Museum and Exhibition Complex named after MT Kalashnikov ". - Izhevsk: MVK SB named after MT Kalashnikov, 2014, p. 139-140), containing a barrel, a receiver, a detachable forend, consisting of two mirror-symmetric barrel linings with a vertical plane of the connector, and a mechanism for compensating for linear expansion of the barrel. The latter is made in the form of an upper thrust ring mounted on the barrel, into the fixed part of which the upper ends of the barrel linings abut, and a lower thrust ring, in which the lower ends of the linings are placed, which are under the influence of springs, pressing them to the fixed part of the upper thrust ring. When heated during firing, the barrel lengthens and the upper thrust ring moves forward; wherein the springs of the barrel linings, combined into a single U-shaped part, move the linings next to the upper thrust ring.

The known device, taken as a prototype, has a complex structure that requires the production of fit along the contour of the barrel linings to the lower thrust ring. And in the event of a breakdown of one or both springs of the barrel linings, the mechanism for compensating for linear expansion of the barrel ceases to fulfill its function (“tracking” the linear expansion of the barrel), which negatively affects the accuracy of shooting.

The objective of the claimed invention is to improve the accuracy of shooting and simplify the design.

The problem is solved due to the fact that in a firearm containing a barrel, a receiver, a detachable forend and a compensation mechanism for linear expansion of the barrel, the compensation mechanism for linear expansion of the barrel is made in the form of a U-shaped base fixed to the forearm with protrusions on the side walls and with a bend in its front part, while the protrusions are placed in the guide grooves on the receiver, and the bend has a hole for placement in it of the free end of the guide rod, the other end is fixed to the barrel Flax box being mounted on the guide rod helical compression spring, one end of which abuts against the receiver, and the other - to bend U-shaped base.

The claimed device has a simple and reliable design that provides high accuracy. A cylindrical compression spring, mounted on the guide rod of the receiver and resting on one end of the receiver and the other on the bend of the U-shaped base, reliably performs the function of compensating for linear expansion of the barrel, thereby ensuring high firing accuracy. In case of breakage of the forearm spring, the compensation mechanism continues to fulfill its function. The implementation of the base of the forearm with protrusions on the side walls located in the guide grooves on the receiver increases the reliability of the device, ensuring stable pairing of the base of the forearm with the receiver (prevents overwriting of the forearm, and also eliminates the need to fit mating surfaces).

The claimed invention is illustrated by drawings, which depict:

FIG. 1 - general view of firearms (in the context);

FIG. 2 is a section AA in FIG. one;

FIG. 3 - the front of the forearm (in the context);

FIG. 4 is a section BB in FIG. one;

FIG. 5 is a section BB of FIG. 3.

The claimed device comprises a barrel 1 (Fig. 1), a receiver 2 and a detachable forend 3, on which is fixed (for example, screws) the base 4 of the forearm 3. The base 4 (Fig. 2) is made in the form of a U-shaped part and has on the side the walls of the protrusions 5, placed in the grooves 6 of the receiver 2. In addition, the base 4 of the forearm has in its front part a bend 7 (Fig. 1) with a hole 8 (the bend 7 can be made in the form of a front wall of a U-shaped base 4). The guide rod 9 is fixed at one end to the receiver 2, and the second free end is placed in the hole 8 on the bend 7 of the base 4 of the forearm. A compression spring 10 is installed on the guide rod 9, one end of which abuts against the front end of the receiver 2 and the other into the bend 7 of the base 4. In the front part, the forearm 3 (Fig. 3) is attached to the barrel post 11 (for example, using screw). The direction of the forearm 3 in the front part is due to the U-shaped upper base 12 (Fig. 4) having side protrusions 13 and 14 with stops 15 and 16 (Fig. 5). The lateral protrusions 13 and 14 (Fig. 4) of the upper base 12 interact with the grooves of the rack 11, and the stops 15 and 16 (Fig. 5) interact with the front end of the rack 11, providing a connection of the forearm 3 (Fig. 3) in the front with the barrel one.

When firing due to heating, the rack 11 of the forearm 3 is shifted forward together with an elongated barrel. Spring 10 of the forearm 3, acting on the bend 7 of the base 4, moves the forearm 3 (ie, "monitors" the rack 11 of the forearm 3, ensuring accuracy).

Claims (1)

A firearm containing a barrel, a receiver, a detachable forend and a mechanism for compensating for linear expansion of the barrel, characterized in that the mechanism for compensating for linear expansion of the barrel is made in the form of a U-shaped base fixed to the forearm with protrusions on the side walls and with a bend in its front part, while the protrusions are placed in the guide grooves on the receiver, and the bend has an opening for placement in it of the free end of the guide rod, the other end mounted on the receiver, and on directs rod mounted helical compression spring, one end of which abuts against the receiver, and the other - to bend U-shaped base.

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