RU2473857C1 - Automatic firearm - Google Patents

Abstract

FIELD: weapons and ammunition.

SUBSTANCE: firearm comprises barrel, breech end with bolt lug, breech box with breech frame guides, breech frame, breechblock with lugs and crosswise lug for interaction with helical groove, and tripper. Said helical groove is made on breech frame insert with lug to rest on breech frame guide lower surfaces. Tripper is arranged to revolve in breech frame on transverse pin. Bolt end has lengthwise groove to interact with tripper. Spring-loaded switch is fitted in automatic fire breech box.

EFFECT: higher reliability.

2 dwg

Description

The invention relates to military equipment and can be used in automatic small arms.

The Shosh light machine gun is known (Material part of small arms, book 2, edited by A.A. Blagonravov, M .: Oborongiz, NKAP Main edition on armament and ammunition, 1946, p. 219-221), taken as a prototype. The machine gun contains a barrel, breech, receiver, bolt carrier, bolt with combat stops and disconnector.

The disadvantage of the prototype is the hard inclusion in the shutter uncoupler when interacting with a copier on the receiver and the need to introduce a guaranteed clearance along the shutter axis between the uncoupler and shutter to ensure the normal functioning of the shutter group when unlocking the bore, because the gas pressure in the liner and bolt abruptly pushes onto the bolt frame.

The proposed invention solves the problem: improving the operational reliability of weapons.

The technical result obtained by using the present invention is to improve the operating conditions of the shutter uncoupler and to ensure that the shutter uncoupler is precisely fixed relative to the shutter frame.

The specified technical result is achieved by the fact that in an automatic small arms containing a barrel, a breech with combat stops, a receiver with guides for the bolt frame, a bolt frame, a bolt with combat stops and a transverse protrusion for interacting with a spiral groove, the disconnector is new, that the spiral groove is made on the liner of the shutter frame having a protrusion for supporting the lower surfaces of the guides of the receiver, the disconnector is mounted to rotate in the shutter frame on the transverse axis , a longitudinal groove is made on the shutter shaft with the possibility of interaction with the disconnector, and a spring-loaded switch is installed in the automatic receiver.

Technical solutions with features distinguishing the claimed solution from the prototype are not known and do not follow explicitly from the prior art. This suggests that the claimed solution is new and has an inventive step.

The invention is illustrated by drawings, where

figure 1 shows a top view of an automatic small arms;

figure 2 is a section aa of figure 1.

Automatic small arms consists of a barrel 1 installed in the breech 2 with the fighting stops 3. The breech 2 is fixed in the receiver 4 of the automatics. In the receiver 4, guides 5 are made for the bolt frame 6, which at the same time are the supporting pads for the liner 7 of the bolt frame 6, and on the axis 8 there is a switch 9, spring-loaded with a spring 10. In the bolt frame 6 there is a bolt 11 with support stops 12, a longitudinal groove 13 and the transverse protrusion 14, the insert 7 and the disconnector 15 with the spring 16 on the axis 17. The spiral groove 18 for securing the shutter 11 through the protrusion 14 is made on the insert 7 of the shutter frame 6. The isolator 15 has a front shoulder "a" for interacting with the surface "B" the switch 9, the rear shoulder "c" for interaction with the surface "d" stop switch 9 and "e" to interact with the longitudinal groove 13.

Automatic small arms works as follows. Before the shot, the bolt frame 6 with the shutter 11, the liner 7 and the disconnector 15 is rolled into the front position. The shutter 11 enters the grooves of the barrel 1, at this moment the surface "b" of the switch 9 acts on the front shoulder "a" of the disconnector 15, forcing the latter to turn and disengage the stop "e" with the longitudinal groove 13. Next, the shutter frame 6 with the insert 7 with a spiral groove 18 by means of a transverse protrusion 14 causes the shutter 11 to turn around, engaging the combat stops 3 and 12.

After firing a shot under the influence of powder gases, the bolt frame 6 is rolled back and the transverse protrusion 14 through the spiral groove 18 expands the bolt 11, at this moment the spring-loaded disconnector 15 “catches” the longitudinal groove 13 of the bolt 11, popping the stop “e” into this groove. The shutter 6 becomes fixed relative to the frame of the shutter 6 with the insert 7, which is necessary for the correct functioning of the automation. At the same time, during the rollback, the back shoulder “c” of the disconnector 15 acts on the surface “d” of the switch 9 and forces the switch 9 to turn on the axis 8, thereby not interfering with the disconnector 15 to fix the shutter 11.

Claims (1)

Automatic small arms containing a barrel, a breech with combat stops, a receiver with guides for the bolt frame, a bolt frame, a bolt with combat stops and a transverse protrusion for interacting with a spiral groove, disconnector, characterized in that the spiral groove is made on the liner of the bolt frame, having a protrusion for resting on the lower surfaces of the receiver rails, the disconnector is mounted for rotation in the bolt frame on the transverse axis, a longitudinal groove is made on the bolt shank with the possibility of interaction with the disconnector, and a spring-loaded switch is installed in the automatic receiver.

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