RU2662373C1 - Small arms - Google Patents

Abstract

FIELD: weapons and ammunition.

SUBSTANCE: invention refers to the field of armament, namely to small arms. Small arms contain the barrel box with the barrel, the shoe fixed in the receiver, the cover, in the upper part of which the plate is installed. Fixation of the lid on the receiver in the working position is carried out in the front part using the transversely biased retention pin that cooperates with the opening in the projection of the lid and the opening in the shoe, and in the rear part – by the spring-loaded roller, which is designed with the possibility of its longitudinal movement in the grooves of the lid and which interacts with the prismatic groove made in the projections on the back-plate.

EFFECT: higher operating characteristics.

1 cl, 4 dwg

Description

The invention relates to small arms and can be used in automatic small arms, devices structurally similar to small arms.

The 5.45-mm AK74 Kalashnikov assault rifle and the AK74M 5.45-mm Kalashnikov assault rifle (see M. Popenker. “Assault rifles of the world”, Edition: M .: ACT “Polygon”, 2004), containing a receiver with barrel, cover, return mechanism with a spring and a protrusion, sighting block. The lid is mounted on the receiver:

- in the front part - with the help of a semicircular cutout on the block of the sighting and front end of the cover;

- in the rear part - with the help of the protrusion of the return guide spring entering the window in the rear wall of the cover. The return spring guide, in turn, is installed with a T-shaped protrusion in the longitudinal groove on the butt plate of the receiver.

The disadvantages of these samples are low performance due to the impossibility of placing modern sighting systems (collimator, optical, night sights, etc.), the installation of which requires a Picatinny rail.

A well-known 18.5 mm special carbine with a box magazine 18.5KS-K, selected as the closest analogue (see http://modernfirearms.net/shotgun/rus/ks-kr.html), containing a receiver with a barrel, cover with Picatinny rail, sighting pad, recoil pad.

The lid is mounted on the receiver:

- in the front part - articulated on an axis aligning the hole in the protrusion of the lid with the holes on the protrusions of the sighting pad;

- in the rear part - with the help of the protrusion of the return guide spring entering the window in the rear wall of the cover. The return spring guide, in turn, is installed with a T-shaped protrusion in the longitudinal groove on the butt plate of the receiver.

The disadvantage of this design of the cover fastening is the possibility of swinging the fixed cover around the axis, within the backlash in the joints of the T-shaped protrusion of the return spring with the groove of the recoil pad and the protrusion of the return spring with the window in the back wall of the cover, which leads to a deterioration in the accuracy of fire and instability of the midpoint hit (STP) when shooting with an optical (collimator, night) sight mounted on the Picatinny rail.

The technical task of the invention is to increase the operational characteristics of small arms.

The technical result is to ensure a stable position of the cover and, accordingly, the sight mounted on the bar of the cover, when firing and a uniform position of the cover after removal and subsequent installation.

The problem is achieved in that in small arms, the lid is fixed to the receiver:

- in the front part - a transversely shifting latch interacting with the hole in the protrusion of the lid and the hole in the block fixed relative to the receiver;

- in the rear part - a spring-loaded roller, with the possibility of longitudinal movement of the latter in the grooves of the lid, interacting with a prismatic groove made in the protrusions on the butt plate of the receiver.

The latch limits all movement of the cover except rotation.

The spring-loaded roller self-installs in the prismatic groove of the recoil pad, choosing all possible backlash, and interacting with the faces of the grooves of the cover, provides a stable return to its original position when shooting, as well as a uniform position of the cover after removal and subsequent installation.

The invention is illustrated by drawings, which depict:

in FIG. 1 - general view of the weapon;

in FIG. 2 - longitudinal section of the weapon;

in FIG. 3 is a section AA in FIG. one;

in FIG. 4 - callout B in FIG. 2, the cover and spring are not shown.

The small arms comprise a receiver 1 with a back plate 2 and a block 3, a cover 4, a latch 5. The back plate 2 and a block 3 are rigidly fixed relative to the receiver 1. A prismatic groove 7 is made in the protrusions 6 of the back plate 2, a cutout 8 and a hole 9 are made in the block 3 A strip 10 is installed in the upper part of the cover 4, a protrusion 11 is made in the front of the cover 3, in which a through hole 12 is made. In the back of the cover 4, grooves 13 are made in which the roller 14 is mounted, spring loaded with spring 15.

The bar 10 has a profile made in accordance with the international standard (STANAG 2324 or Mil-Std-1913), or any other profile that allows you to mount sights. The spring 15 pushes the roller 14 forward to the stop in the front face of the grooves 13 when the cover 4 is separated from the weapon and to the stop in the prismatic groove 7 when the cover 4 is mounted on the weapon.

When the cover 4 is mounted on the weapon, the roller 14, under the influence of the spring 15, self-installs in the prismatic groove 7 and, acting on the edges of the grooves 13, ensures a stable return of the back of the cover 4 to its original position when firing and a stable position of the cover 4 after removal and subsequent installation. The latch 5 is installed in the hole 9 and the hole 12, fixing the front of the lid 4 relative to the receiver 1.

To attach the cover 4, it is necessary to put its back wall on the back plate 2 so that the roller 14 fits into the prismatic groove 7 and the protrusion 11 into the cutout 8. Next, overcoming the resistance of the spring 15, it is necessary to align the hole 12 in the protrusion 11 with the hole 9 in the shoe 8, after which the latch 5 is advanced through the hole 9 and the hole 12.

To remove the lid 4 from the weapon, release the latch 5 from the mesh with the hole 12 in the protrusion 11. Then, pulling the lid 4 back, separate it from the receiver 1.

The proposed design of small arms allows to increase operational characteristics by ensuring a stable return to the starting position when firing and a uniform position on the weapon after removal and subsequent installation of the cover with sights fixed on it.

Claims (1)

Small arms containing a receiver with a barrel, a shoe mounted in the receiver, a lid in the upper part of which there is a strap, a back plate, characterized in that the lid is fixed to the receiver in the working position in the front part with a transversely shifting latch interacting with the hole in the protrusion of the cover and the hole in the block, and in the rear part - a spring-loaded roller made with the possibility of longitudinal movement in the grooves of the cover and interacting with the prismatic groove, nennym in the projections on the back plate.

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