CZ2000209A3 - Kalashnikov assault rifle automatic weapon system - Google Patents

Abstract

The invention relates to hand automatic firearms. The weapon comprises a receiver (1) in which a trigger and firing mechanism and a locking mechanism are installed. The trigger and firing mechanism comprises a firing hammer (20) and a sear of the autosafety with an automatic sear notch (21). The locking mechanism comprises a turning bolt (8) and a bolt support (10) with a rear lug interacting with the firing hammer (20). On the receiver (1) a butt (3) is installed on a hinge, and at the front part there is a barrel (2) with a gas-escape mechanism. The novelty of the claimed automatic weapon is that the bolt support (10) is made in such a way that it can interact with the tapered supporting surface of the receiver (1). The rear lug is made in such length which eliminates contact of the firing hammer (20) with the firing rod (9) when the bolt support (10) recoils. The rod (12) is installed in the bolt support in such a way that a limited angular turning is allowed, for example, on the threading with a clearance. The gas tube (6) has a lug (17) which contacts with the slot (18) of the rear-sight bed (4) and is spring-loaded in the direction of the muzzle end. The sear (21) is made with a platform (23) of the autosafety and a platform (22) of the hand reloading sear notch providing guaranteed contact of the bolt support (10) and the firing hammer (20) under hand reloading and a guaranteed clearance between them under automatic fire. In the butt there are reinforcing ribs (30) which form a trap (31) for the box (32) with accessories closed by a spring-loaded turning cap (34) installed in such a way that it can interact with the pusher (27) of the retainer (29) of the stowed position. In the rifled portion of the barrel (2) transition from the land to the bottom of rifling is made in the form of two conjugating radii and a tangent located perpendicularly to the plane passing through the bore axis of the barrel (2) and the centre of the land. In the barrel (2) between the conic taper of the lands (42) and the rifled portion an additional conic area (43) is made.

Description

Technical field

The invention relates to a small automatic weapon.

BACKGROUND OF THE INVENTION

The well-known 7.62 mm AK-47 Kalashnikov assault rifle (see, 7.62 mm AK Kalashnikov assault rifle shooting manual, "DOSAAF publishing house, 1969) includes a receiver, a barrel with a cartridge chamber and a grooved part, In conclusion, the trigger and the trigger mechanism is triggered, firing pin, automatic fuse and fixed stock.

Improved AKMS Kalashnikov 7.62 mm automatic rifle with folding stock (see "AKM and AKMS Kalashnikov automatic rifle shooting manual", US Army Department of Defense, 1971) includes protector capsule, slide-barrel slide mechanism triggers located in the breech housing installed on the breech housing rails, and further with a backstop interacting with the firing pin, the trigger and the trigger mechanism comprising the firing pin and the trigger lever with an automatic lock, a gas leak mechanism with a piston whose rod is located in the breech housing opening; it further comprises a folding stock and a barrel, a rear plate (bed) with a cartridge chamber and a grooved portion.

The disadvantage of this model is its unreliability and errors in use when used in extremely difficult climatic and non-standard conditions, low fire accuracy and inadequate operating characteristics.

SUMMARY OF THE INVENTION

It is an object of the present invention to increase the reliability and performance of the weapon.

To solve the problems, the offensive weapon comprises a receiver, a bolt mechanism comprising a firing pin located in a bolt body located on the rails of the bolt holster, further comprising a rear stop cooperating with the firing pin, a trigger and a strike mechanism comprising a firing pin and a trigger fuse with tension a gas leak mechanism with a gas pipe and a piston whose rod is located in the opening of the breech body, a hinged stock with grips for firing and stowing position and a barrel with a back plate comprising a chamber and a grooved portion.

-2 The novelty of the claimed device is that the breech body is made in such a way that it can cooperate in the front position with the conical surface of the breech case, where the rear breech body plate has a length that prevents the firing pin from contacting the firing pin when the breech body returns (recoil) to a rearward position where the rod is positioned within the closure body so as to allow limited angular displacement, and wherein the gas pipe is provided with a stop that contacts the rear plate slot.

The gas piston rod is inserted into the hole of the breech body by a thread with a gap. The trigger lever of the fuse is equipped with a stretching thumb manual charging in the form of a platform on the trigger lever, located at a certain distance from the track body of the breech, allowing the body of the breech contact with the firing pin. The shutter lever auto-tensioning platform is located at a distance from the shutter body track, providing a gap between the breech block and the firing pin,

Inside the stock are reinforcing ribs, which form the attachment of the auxiliary box with accessories, and which is closed by a spring-loaded rotary closure, which is mounted so as to allow the slider to interact with the handle of the tilted position.

The gas leak tube is spring-loaded relative to the rear plate in the direction of the end of the tube mouth.

In the mainly grooved portion, the transition from the groove field to the groove base is formed in the form of two associated roundings and tangents perpendicular to the plane passing through the bore axis and the center of the groove field. In the barrel, between the conical fields of the grooves and the grooved portion, another conical section is formed having a length L1 = (4 ... 6) L, where L is the sum of the cone lengths of the hub chamber and the conical taper of the fields.

The combination of the proposed elements of the claimed automatic weapon greatly increases the reliability of the operational characteristics of the whole unit.

Overview of the drawings

The essence of the invention is illustrated in the following figures, wherein; Fig. 1 shows an overall view of the assault weapon; Fig. 2 shows a view in the direction A (Fig. 1) of the breech body in the forward position where it is in contact with the breech stop; Fig. 4 shows a cross section taken in the direction of GG in Fig. 3; Fig. 5 shows a firing pin which is in contact with the rear stop;

Fig. 6 shows the firing pin on the automatic thumb lever tensioning thumb, Fig. 7 shows the firing lever on the automatic thumb lever cocking thumb FIG. 8 is a cross-sectional view of a plastic stock with a housing.

Fig. 9 shows a cross-section of the stock in the BB direction of Fig. 8, Fig. 10 shows a cross-section of the stock in the XX direction of Fig. 8, Fig. 11 shows an enlarged view of Part D in Fig. 8; main, FIG. 13 shows a side view of the barrel bore, shown in cross section in the EE of FIG. 12; FIG. 14, see the sign in FIG. 13, FIG. 15, see the sign M in FIG.

DETAILED DESCRIPTION OF THE INVENTION

The claimed automatic weapon (Fig. 1 includes a receiver 1 to which the barrel 2 and a plastic stock 3 are attached from the front. A rear plate 4 and a gas chamber 5 are mounted on the barrel, with a gas tube 6 between them. 4) a slide closing mechanism (FIG. 3) is provided on the rails 7, which includes a rotary slide 8 with a firing pin 9, which is located in the slide body 10. The slide body includes a rear stopper HV of the slide body hole. On the side of the breech body is a truncated platform 14 (Fig. 2), and on the breech housing is formed a stop 15 with a reciprocating trough by a platen 16. The gas tube includes a stop 17 at the rear and bottom which fits into slot 18 of the rear plate 4 and is compressed by a spring 19 in the direction of the mouth of the gas outlet orifice. 6, which includes a firing pin 20 with a lock and a trigger lever 21 with a manual thumb tensioning thumb 22 in the form of a platform 22. an automatic trigger lever in the form of a platform 23 (FIG. 7). The stock 3 is rotatably attached to the breech housing (FIGS. 8 and 9) by means of the axle 24. The stock includes a hollow plastic sleeve 25, a stock shoe 26, a slide 27 with a stopper 28 which contacts the handle of the retracted position 29. reinforcing ribs 30 (FIG. 10), which form a catch 31 of the accessory box. The housing is spring-loaded 33 and rests against a pivot cap 34 whose lower stop 35 (FIG. 11) contacts the reciprocal stop 36 of the slide 27. The lateral recess 37 (FIG. 9) on the outer surface of the stock is formed in the form of a seat.

-4 • Night-sight leaf flap 38 mounted on the breech 1. rear side of the receiver is located spring-loaded grip stock firing position.

The barrel 2 (FIG. 12) includes a cartridge chamber 40 with a conical portion 41 and a grooved portion that includes a conical taper field 42, another conical surface 43 and a cylindrical part 44. The length of the other conical surface 43 is L1 = (4 ... 6 ). (Ls + Lc), where Ls is the length of the conical portion 41 and Lc is the length of the conical taper field 42.

The grooved part of the barrel has a profile consisting of grooving and fields between the grooves (Fig. 13,14). The transition between them includes the part 'ab' with the radius η, the part 'bc' with the radius ib, and the part 'cd' that is tangent to the radius Γ2 perpendicular to the surface S passing through the barrel bore axis and the center of the field. and dR is the spline diameter,

The automatic weapon works as follows. To charge the weapon, it is necessary to pull the breech body 10 backwards and release it immediately. Upon retraction of the breech body backward, the rear stopper H will pull the firing pin 20 to actuate the tensioning thumb of the manual charging 22 of the trigger trigger lever 21 at a distance from the breech block path, resulting in interference K between the firing pin and the breech block. After the shutter button is pressed, the resulting gases are activated by means of the piston 13 with the rod 12, and the slide is moved backwards. During the rearward movement of the breech sleeve again stretches the firing pin, the firing pin is rotated and actuates the tensioning thumb 23, which is located at a certain distance from the breech sleeve track, creating a gap L between the firing pin and the breech sleeve. When returning from recoil breech case freely passes over the firing pin without touching it, which greatly increases the reliability of activity Automatic weapons. During the firing of the firing pin by the back stop 11, the firing pin will never come into contact with the firing pin 9 due to a gap "i" (fig. 5), which is created by a specially selected length, and the firing pin cannot push the cartridge out of the magazine before the right moment eliminating charge loss.

Once the breech housing has taken a forward position, its truncated platform 14, tapered at an angle β (Fig. 2), strikes the reciprocal platform 16 of the breech housing stop 15. During this operation, the breech body moves to the left and pushes into the left rail 7 of the breech housing. The piston 13 with the breech block rod 12 enters the gas chamber 5 and forms a gap in the grooved connection with the breech block that rotates at a given angle that compensates for the errors of the gas chamber installation on the barrel and further limits the bias of the breech block from the straight direction.

During firing, the gas tube 6, fixed by the stop 17 in the slot 18 and pushed by the rear plate 19 through the rear plate 4, does not perform any inertial movement.

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During firing, the bullet cuts into the borehole fields during inertial movement, with the tapered portion 43 allowing for a much smoother and uniform cutting of the bullet while reducing the bullet pressure on the borehole field. Everything that allows smoother missile deformation, due to the shape of the bore fields, increases the life of the barrel. The existence of a curved transition surface from the fields to the "abc" grooves created by the radius of nar ₂ , and the linear section "cd" along the tangent, allows for better filling of the grooves with the bullet shell, preventing fired gunpowder gas leakage and increasing initial bullet velocity stability.

The plastic stock can be lowered from the firing position to the lowered position and vice versa. To tilt from the firing position to the stowed position, it is necessary to depress the slide 27 protruding from the butt opening 26 of the butt. After said release, the stock can be pivoted about the axis 24 and adjusted to the firing position. To adjust the stock to the stowed position, press the handle of the firing position 39 and rotate the stock around the axis 24 to the stowed position. As a result, the folded-position grip 29 engages the side edge of the butt of the stock 26 and locks the stock with its teeth in the stowed position. When the stock is lowered, the night sight flap 38 is inserted into the recess 37 on the outer surface of the stock. If it is necessary to pull out the accessory box 32, it is necessary to forcefully squeeze the lid 34 of the butt plate 26 with the fingers. The lid is rotated to open the hole in the butt plate. Due to the spring 33, the box is ejected from the opening formed by the ribs 30 in the cavity of the stock housing 25. The spring-loaded cap 34 returns to its original position. To do so, the lower cap stop 35 cooperating with the stop 36 of the slide 27 moves the slide to the rear position.

The claimed invention completely solves the target technical problem: it increases reliability and operational characteristics, while being widely included in the new Kalashnikov assault rifle models that are currently being produced (AK 101, AK 102, AK 103, AK 104, AK 105 etc.).

Claims (7)

PATENT CLAIMS 1. Kalashnikov "assault rifle" automatic weapon includes a receiver (1), a trigger and a trigger mechanism including an emitter (20) and a fuse trigger with an automatic cock (21), a slide mechanism including a rotary bolt (8) with a firing pin (10) and located on the rails (7) of the receiver (1), further comprising a rear stop (11) interacting with the firing pin (20), said weapon further comprising a gas leak mechanism with a gas pipe (6) and a piston (13) with a rod) 12), which is located in the opening of the breech body (10), a folding stock (3) with a firing and tilting position grip, and further comprising a barrel with a rear plate (4), which includes a chamber (40) and a grooved portion. an automatic weapon characterized in that the breech body (10) is made such that when in the forward position it can contact the conical surface (16) of the breech case (1) where the rear Item / 11 / of the bolt / 10 / made in a length which prevents the firing pin / 20 / contacting the firing pin / 9 / there when the breech body is in recoil; wherein the rod (12) is located in the receiver body with limited angular displacement, wherein the gas tube (6) has a stop (17) that contacts the slot (18) of the rear plate (4). Automatic weapon according to claim 1, characterized in that the rod (12) of the gas pipe (13) is placed, with some play and by means of a thread, in the opening of the breech body (10). An automatic weapon according to claim 1, characterized in that the trigger trigger (21) of the fuse comprises a tensioning thumb for manual charging in the form of a platform (22) on the trigger lever (21) which is located some distance from the slide body path (10). , which ensures contact of the breech body (10) with the firing pin (20), when the platform of the automatic cock (23) of the trigger lever (21) is formed at a certain distance from the travel of the breech body (10). / and with the striker / 20 /. An automatic weapon according to claim 1, characterized in that the reinforcing ribs (30) formed inside the stock (3) form a catch (31) of the accessory box (32), the catch being covered by a spring-loaded swivel cap (34) located such that it can cooperate with the slider of the stowed position handle. • · * - / * v v v v v v v v v v v v v v v v v v v v An automatic weapon according to claim 1, characterized in that the gas pipe (6) is spring-loaded towards the rear plate (4) in the direction of the pipe mouth. An automatic weapon according to claim 1, characterized in that in the grooved part of the barrel (2) a transition from the field to the bottom of the grooving is provided in the form of two associated roundings and a tangent positioned perpendicular to the plane passing through the bore and center axis field. An automatic weapon according to claim 1, characterized in that the barrel comprises a further conical section of length between the conical taper of the fields (42) and the grooved portion. L1 = (4 ... 6) L, where L is the sum of the cone length of the cartridge chamber and the conical taper of the fields (42).