RU2814604C9 - Bracket for attachment of additional accessories to block of small arms sight - Google Patents

Abstract

FIELD: weapons.

SUBSTANCE: invention relates to accessories for attachment of additional devices, in particular optical sights, to small arms. Bracket for attachment of additional devices to block of sight of small arms, containing bar, having through, substantially vertical, hole for screw, screw and nut, forming a screw pair, characterized by the fact that the upper part of the plank has longitudinal side protrusions for attachment of additional devices, the lower part of the plank has a width that allows it to enter the block without a gap between the side surfaces of the lower part of the plank and the side surfaces of the block, and such a height that when installed on the block between the lower surface of the plate and the block there is a gap for the nut, front surface of the lower part of the plank has a slope and is made at least partially congruent to the inner surface of the front part of the shoe, nut has edges on sides made so that they can enter longitudinal slots located from inside in lower part of block, on the left and on the right.

EFFECT: attachment of the bracket is performed without the use of screws passed through the lugs of the standard block of the sight and working for shear during recoil.

7 cl, 8 dwg

Description

FIELD OF TECHNOLOGY TO WHICH THE INVENTION RELATES

The invention relates to devices for attaching additional devices, in particular optical sights, to small arms, in particular to carbines and machine guns.

BACKGROUND OF THE ART

Despite the high popularity of the Kalashnikov assault rifle and its modifications (hereinafter - AK) (see, for example, Manual on small arms 7.62 mm modernized Kalashnikov assault rifle. // Military publishing house of the USSR Ministry of Defense. Moscow. 1970) in the countries of the world, won The highest reliability of operation in various climatic conditions, leading weapon-producing countries also note its shortcomings, one of the main ones is the poor equipment for installing modern aiming and target designation devices. At the same time, the side dovetail mount, installed on the left side of the receiver, cannot solve this problem due to design features (low rigidity of the receiver and a large distance from the sight to the barrel). Therefore, the most correct solution would be to install a universal (Picatinny type) rail under the sight, on the sight block instead of the standard rear sight.

A mount for a Kalashnikov assault rifle is known, containing an aiming block, an aiming bar, a first adjustment screw and a second adjustment screw (http://strikeindustries.com/shop/manual/AK_Rair_Rail_Installation.pdf). The sighting bar is mounted on a screw, which is threaded into the eyes of the block (holes for the trunnions of the sighting bar) in such a way that the bar forms a kind of double-armed lever. Adjusting the inclination of the sighting bar relative to the longitudinal axis (elevation angle) is carried out by simultaneously screwing the first adjustment screw located in front of the axis and the second adjustment screw located behind the axis until it stops.

Thus, the rigidity of the structure in the known fastening is ensured only in the longitudinal direction, provided that both screws are tightly tightened. However, the screws are located on the same line, so the rigidity in the transverse direction is small and depends on the size of the gap between the transverse screw and the hole through which it passes. Under the influence of strong dynamic loads during recoil, the transverse screw works to shear, as a result of which the structure, which has support points only at the points of contact of the thrust screws with the surface of the box, becomes loose and slides back and forth, which can lead to a violation of zeroing during the operation of the weapon, and entails the need for adjustment after removal and reinstallation.

The strength of the known design allows the installation of only light sights weighing 100-200 g.

There are also known rails for fastening them to the receiver using a transverse screw and a vertical screw, which requires drilling the sighting block and cutting threads (publications on the Internet

http://popgun.ru/viewtopic.php?f=288&t=274569&start=2100;

http://guns.allzip.org/topic/241/1164522.html;

http://www. dmazay.ru/index.php?productID=7225).

The reason that prevents the achievement of the technical result described below in known mounts of this type is that in order to rigidly fix the end of the strap it is necessary to drill a hole in the receiver and tap a thread. This not only complicates the installation of the strap, but also worsens the rigidity of the receiver and breaks its tightness. Although this mount is more reliable than the one discussed above, and it allows the installation of sights up to 400 g, nevertheless, it is still not without the disadvantage of the solution discussed above: the longitudinal screw works to shear, and there is a gap between the surface of the screw and the hole in the bar , so the bar may wobble in the forward and backward directions under the influence of strong dynamic loads. This method of fastening does not meet the requirements of regulatory and technical documents, is not widely used and is currently used in artisanal conditions.

SUMMARY OF THE INVENTION

For clarity, the terms and expressions used in this context, as well as their derivational and grammatical equivalents, are given the following meanings.

The sight block is a fastener installed on all modifications of the AK (in particular, AK-47, AKM, AK-74, AKS-74, AK-74M, AK-103, AK-104, AK-105, RPK, RPK-74 ), for mounting the rear sight on it.

The strap is a part of the bracket intended for installation of additional devices, designed to be attached to the sight block.

The remaining terms and expressions have the usual meaning known to specialists.

For simplicity, in this text and in the illustrative drawings, the device is depicted and described in its typical orientation, when the block is horizontal, so expressions such as “top”, “bottom”, “horizontal”, “vertical”, “lateral”, “longitudinal” axis", "left", "right" and the like, which are used for simplicity and clarity of presentation, should be understood more broadly than their literal meaning, taking into account the fact that the device can be manufactured, stored, transported, used and sold in other orientations.

The objective of the present invention is to create a bracket for attaching additional devices to small arms, characterized by the following set of properties:

- high rigidity, absence of backlash, wobbling and bouncing in the longitudinal and transverse directions, ensuring stability of orientation and high shooting accuracy for a long time, even with frequent exposure to harmful factors, significant dynamic loads arising from recoil and falling weapons, and significant static loads , due to the weight of additional devices;

- ease of installation, in particular, the possibility of installation on modern models of automatic weapons without drilling the receiver, using welding, soldering, rivets, etc.;

- accuracy and reproducibility of orientation when re-installed after dismantling, in particular, the absence of the need for re-zeroing if the weapon with the re-assembled assembly was previously zeroed.

The technical result is that the above problems are solved in such a way that the bracket is mounted without the use of screws threaded through the eyes of the standard sight block (holes for the sighting bar trunnions) and working to shear during recoil.

The above problem is solved due to the fact that the proposed bracket for attaching additional devices to the block (5) of a small arms sight contains

strip (1) having a through, essentially vertical hole for a screw,

screw (2) and

nut (3) forming a screw pair,

characterized by the fact that

the upper part of the bar (1) has longitudinal side projections for attaching additional devices,

the lower part of the bar (1) has a width that allows it to fit into the block (4) without a gap between the side surfaces of the lower part of the bar (1) and the side surfaces of the block (4), and such a height that when installed on the block (4) between the bottom the surface of the strip (1) and the block (4) leaves a gap for the nut (3),

the front surface of the lower part of the strip (1) has a slope and is made at least partially congruent with the inner surface of the front part of the block (4).

the nut has edges on the sides, made in such a way that they can fit into longitudinal grooves located from the inside in the lower part of the block (4), on the left and on the right.

In one preferred embodiment, said protrusions on the top of the sighting bar form a dovetail, Picatinny, and/or Weaver mounting base.

In another preferred embodiment, the front surface of the lower part of the strip (1) is made congruent and represents a flat surface.

In another preferred embodiment, the lower surface of the strap (1) at the front and rear has pads made in such a way that after installing the strap (1) on the sight block (4), they (platforms) rest against the surface of the block (4), while said pads are located in such a way that the bar (1), mounted with support on both platforms (5), is oriented essentially at an angle of 180 ^° to the longitudinal axis.

In one of the preferred embodiments, the head of the screw (2) is made countersunk, and the upper end of the above-mentioned screw hole has a conical extension, configured to install the head of the screw countersunk.

In another preferred embodiment, the head of the screw (2) has a hexagonal or Phillips recess.

In another preferred embodiment, the small arms are a Kalashnikov assault rifle and/or a modification thereof.

As will be clear to one skilled in the art, the problem at hand is achieved in part through a combination of several techniques.

Firstly, due to the fact that a supporting inclined surface has been added to the design of the bracket, which fits tightly to the inclined surface in the front part of the sighting block and acts as a stop during recoil.

Secondly, due to the fact that the design uses a nut with two side protrusions that engage with technological protrusions on the sighting block, which made it possible to solve the problem, simplify the design as much as possible and use only one screw, which works normally in tension. The applied solution allows the installation of sights weighing up to 1 kg. Practice has shown that such a mounting of the rail with an installed sight can withstand even a shot from the GP-25, and the weapon’s zeroing is not disrupted.

The above-described device is further illustrated in figures 1-8 using the example of one of the possible forms of implementation.

BRIEF DESCRIPTION OF DRAWINGS AND OTHER MATERIALS

Fig. 1 - parts of the bracket and the standard block of the Kalashnikov assault rifle (AK-47, AKM, AK-74, AKS-74, AK-74M, AK-103, AK-104, AK-105, RPK, RPK-74), side view.

Fig. 2 - bar, front left view.

Fig. 3 - block, top left view.

Fig. 4 - block, front view from below.

Fig. 5 - nut with two side projections.

Fig. 6 is an enlarged image of the support surface that absorbs recoil.

Fig. 7 - longitudinal section of the bracket and block assembly, shown in isometry.

Fig. 8 - cross section of the bracket and block assembly, shown in isometry.

The following designations are used in the drawings:

1 - bar,

2 - screw,

3 - nut,

4 - sight block,

5 - supporting surface of the standard sight block, which absorbs recoil,

6 - side edges of the nut,

7 - a through, essentially vertical hole for a screw,

8 - lower supporting surfaces of the strip,

9 - side surfaces of the pad (4),

10 - side surfaces of the strip (1),

11 - front surface of the lower part of the bar (1), having a slope,

12 - protrusions of the block (4), located from the inside at the bottom of the block (4), on the left and right.

IMPLEMENTATION OF THE INVENTION

The following example is given only to illustrate the principles of design and operation of the device; Nothing in this section should be construed as limiting the scope of claims.

The bracket for attaching additional devices to the block (5) of a small arms sight contains

strip (1) having a through, essentially vertical, hole for a screw,

screw (2) and

nut (3) forming a screw pair,

characterized by the fact that

the upper part of the bar (1) has longitudinal side projections for attaching additional devices,

the lower part of the bar (1) has a width that allows it to fit into the block (4) without a gap between the side surfaces of the lower part of the bar (1) and the side surfaces of the block (4), and such a height that when installed on the block (4) between the bottom the surface of the strip (1) and the block (4) leaves a gap for the nut (3),

the front surface of the lower part of the strip (1) has a slope and is made at least partially congruent with the inner surface of the front part of the block (4),

the nut has edges on the sides, made in such a way that they can fit into longitudinal grooves located from the inside in the lower part of the block (4), on the left and on the right.

The bracket is installed as follows. The machine gun is partially disassembled (see instructions), then the rear sight and rear sight spring are removed. The nut is inserted inside the rear sight block from the butt side with the narrowed part forward, and the bar is installed on top, in this case you need to align the holes in the nut and the bar. Then the screw is used to tighten the bar to the nut.

The proposed bracket design is simple, reliable, has no backlash, is highly durable, and its installation does not require drilling the receiver or making other changes to the design of the machine gun. In the design described above, there are no weak shear elements; the supporting surface at the front, due to the large projection area on the longitudinal plane, almost completely eliminates wobbling of the bar in the longitudinal direction. Supporting pads on the lower surface of the bar at the front and rear ensure its precise positioning in the desired position and eliminate the need for re-shooting after installation/disassembly. All this together provides high rigidity and strength of the bracket and ultimately increases shooting accuracy.

Claims (7)

1. A bracket for attaching additional devices to the block (5) of a small arms sight, containing: a bar (1) having a through, essentially vertical, hole for a screw, a screw (2) and a nut (3), forming a screw pair, characterized by that the upper part of the bar (1) has longitudinal side projections for attaching additional devices, the lower part of the bar (1) has a width that allows it to fit into the block (4) without a gap between the side surfaces of the lower part of the bar (1) and the side surfaces of the block ( 4), and such a height that when installed on the block (4) between the lower surface of the strip (1) and the block (4) there is a gap for the nut (3), the front surface of the lower part of the strip (1) has a slope and is made congruent with the inner surface the front part of the block (4), while the lower surface of the bar (1) at the front and rear has pads made in such a way that after installing the bar (1) on the sight block (4) they (platforms) rest against the surface of the block (4), and the nut has edges on the sides, made in such a way that they can fit into longitudinal grooves located from the inside in the lower part of the block (4), on the left and on the right. 2. The bracket according to claim 1, characterized in that said protrusions of the upper part of the sighting bar form a dovetail, Picatinny and/or Weaver mounting base. 3. The bracket according to claim 1, characterized in that the front surface of the lower part of the bar (1) is made congruent and is a flat surface. 4. The bracket according to claim 1, characterized in that after installing the bar (1) on the sight block (4), the said platforms located in front and behind the lower surface of the bar (1) are located in such a way that the bar (1), installed with supported on both platforms (5), oriented essentially at an angle of 180° to the longitudinal axis. 5. The bracket according to claim 1, characterized in that the screw head (2) is made countersunk, and the upper end of the above-mentioned screw hole has a conical extension configured to install the screw head countersunk. 6. Bracket according to claim 1, characterized in that the screw head (2) has a hexagonal or Phillips slot. 7. The bracket according to claim 1, characterized in that the small arms are a Kalashnikov assault rifle and/or its modification.