RU2701891C1 - Small arms locking mechanism - Google Patents

Abstract

FIELD: weapons and ammunition.SUBSTANCE: invention relates to locking mechanisms of small arms. Gate frame consists of base, guide plate and shaped case. Rotary bolt includes a gate, an ejector, an ejector spring, an ejector axis and a striker with a pin. On the bolt there are two warheads and a driving ledge. Driving protrusion interacts with the screw surface in the base of the breech frame. Combat stops and driving ledge are inscribed in one diameter.EFFECT: improved manufacturability and reduced dimensions of gate structure of the locking mechanism.5 cl, 6 dwg

Description

The invention relates to the field of weapons and can be used in various weapons, the automation of which is driven by the energy of a propellant charge using recoil forces.

A known design of small arms according to the patent of the Russian Federation No. 2407943, published December 27, 2010, bull. Number 36. The small arms comprise a receiver, a spring-loaded barrel, in the breech of which combat stops are made, mounted on rails in the receiver with the possibility of axial movement of the spring-loaded bolt frame with a bolt, in which mating bolts and a spike are made, interacting with a screw groove on the bolt frame, with the possibility of axial movement, a spring-loaded slide frame with a shutter mounted on rails in the receiver. The bolt contains reciprocal combat stops and a spike that interacts with a screw groove on the bolt frame. The bolt frame comprises a closed helical groove in which a bolt spike is placed protruding beyond the perimeter of the bolt frame. The upper wall of the receiver contains a copier with a helical surface and with the possibility of interaction with the rollback of the barrel with the protruding part of the bolt spike.

A disadvantage of the known design is the complexity and the complexity of manufacturing a shutter frame with a shutter.

The objective of the invention is to improve manufacturability and reduce the size of the shutter frame of the locking mechanism.

The technical result is achieved due to the fact that the rotary bolt is made with combat stops and a leading protrusion inscribed in one diameter, which allows to reduce its size.

The problem is achieved in that the locking mechanism of small arms consists of a rotary bolt mounted in the bolt frame, and located in the receiver. The butterfly valve comprises a shutter, an ejector, an ejector spring, an ejector axis, and a hammer with a pin. The bolt frame consists of a base, a guide bar and a figured casing, the figured casing repeating the inner contour of the receiver, closing the extraction windows of the receiver and the window under the reload handle; and has a window under the return mechanism. The guide bar of the mechanism is made with T-shaped grooves for installation in the base of the bolt frame and is fastened with a latch located coaxially with the barrel bore. The latch has a safety protrusion in the tail. The rotary bolt is made with combat stops and a leading protrusion inscribed in one diameter, the leading protrusion of the bolt being connected to one of the military stops by a jumper to increase the contact area with the fighting stops of the receiver box.

The essence of the invention is illustrated by graphic materials, where:

- in FIG. 1 shows a General view of the locking mechanism;

- in FIG. 2- presents the components;

- in FIG. 3 is a bottom view of the shutter frame;

спереди;- in FIG. 4 - rotary shutter - view

in front;

сзади;- in FIG. 5 - rotary shutter - view

at the back;

- in FIG. 6 - bolt in the receiver.

The locking mechanism consists of a rotary shutter 1 installed in the shutter frame 2. The shutter frame 2 contains a base 3 having in the upper part T-grooves 4 for mounting the guide bar 5 with symmetrical elements A and B and fixed with a transverse pin 6. In the guide bar 5 there is a transverse hole C, under the reload handle.

From above, the base 3 of the shutter frame and the guide bar 5 are closed by a figured casing 7 and are fixed by a latch 8 located coaxially with the barrel bore. The tail portion D of the latch 8 acts as a safety protrusion.

The figured casing 7 provides overlapping of the extraction windows and the windows under the reloading handle, and also in the casing a channel E is made for the placement of the return spring 9.

A channel F is made at the base 3 of the shutter frame to accommodate the rotary shutter 1. Also, at the base 3 of the shutter frame, a longitudinal groove G is made for the receiver reflector 10 and a helical surface H interacting with the driving protrusion K of the rotary shutter 1.

The butterfly valve 1 is made with combat stops - left L and right M, which are entered in one diameter with the leading protrusion K. This is done in order to increase the contact area for locking the bore in the small dimensions of the rotary shutter.

The leading protrusion K is connected to the right combat support M by means of a jumper N to increase strength.

The reflector 10 controls the angular position of the shutter after unlocking in the rollback and before locking in the coast.

In a loaded weapon, before a shot, the cartridge is in the chamber, the barrel, the bolt frame 2 with the rotary bolt 1 are in the extreme forward position. The return spring 9 is in a pre-preloaded state. The locking mechanism of small arms is closed.

After the shot, the bolt frame begins to roll back, and the helical surface N runs on the leading protrusion K of the shutter, as a result of their interaction, the rotary shutter 1 is rotated in the direction of unlocking the bore.

When rolling back the bolt frame 2 is a reflection of the spent sleeve, cocking, preloading the return spring 9.

In the coast of the shutter frame 2 with the shutter 1, the cartridge is sent to the barrel channel. After the shutter comes to its extreme forward position, the shutter frame continues to move forward. In this case, the interaction of the helical surface H in the bolt frame with the leading protrusion K on the rotary shutter 1 leads to its rotation and locking of the barrel. The weapon is loaded and ready to continue shooting.

The proposed technical solution is implemented in a prototype weapon, which has passed comprehensive tests with positive results and is recommended for serial production.

Claims (5)

 1. The locking mechanism of small arms, consisting of a rotary bolt installed in the bolt frame and located in the receiver, the rotary bolt contains a bolt, ejector, ejector spring, ejector axis and drummer with a pin, characterized in that the bolt frame consists of a base, a guide strips and figured casing. 2. The locking mechanism of small arms according to claim 1, characterized in that the figured casing is made repeating the inner contour of the receiver, closing the extraction windows of the receiver and the window under the reload handle, and has a window for the return mechanism. 3. The locking mechanism according to claim 1, characterized in that the guide plate is made with T-shaped grooves for installation in the base of the bolt frame and is fastened with a latch located coaxially with the barrel bore. 4. The locking mechanism according to claim 3, characterized in that the latch has a safety protrusion in the tail. 5. The locking mechanism according to claim 1, characterized in that the rotary bolt is made with combat stops and a leading protrusion inscribed in one diameter, the leading protrusion of the bolt being connected to one of the fighting stops by a jumper to increase the contact area with the fighting stops of the receiver box.

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