RU2718688C1 - Locking unit of rotary bolt of firearm with beveled bolt lugs - Google Patents

Abstract

FIELD: weapons and ammunition.

SUBSTANCE: unit for locking firearms contains bolt lugs on rotary bolt and mating projections on barrel. Contact surfaces of the bolt and the barrel are chamfered relative to the perpendicular to the axis of the barrel.

EFFECT: ensuring uniform distribution of loads between bolt lugs irrespective of angle between breechblock axis and barrel axis.

1 cl, 1 dwg

Description

The present invention relates to the field of military equipment, namely to firearms.

From the current level of technology, firearms with a rotary bolt are known. As a prototype we take a Kalashnikov assault rifle (a 7.62 mm Kalashnikov assault rifle (AK-47), a brief guide to the service, the Ministry of Armed Forces of the USSR, 1949).

The rotary bolt of the Kalashnikov assault rifle has two direct combat protrusions, with which it enters behind two reciprocal direct protrusions on the barrel to lock the barrel channel.

The disadvantage of this technical solution is the uneven distribution when firing loads between the combat protrusions of the bolt when it deviates by a certain angle from the axis of the bolt from the axis of the barrel.

The task to which the invention is directed is to create a design for a rotary shutter locking assembly, which ensures a uniform load distribution between the shutter fighting protrusions during firing.

This problem is solved by performing the contacting surfaces of the combat protrusions of the bolt and the reciprocal protrusions on the barrel beveled relative to the perpendicular to the axis of the barrel, which, when fired, leads to the installation of the combat protrusions of the bolt in a position that provides a uniform load distribution between the fighting protrusions of the bolt. The contacting surfaces of the combat protrusions of the bolt and the reciprocal protrusions on the barrel can be made rounded inward or outward.

The locking unit works as follows: When fired, the bottom of the sleeve presses on the shutter mirror, pushing it backward, while the beveled surfaces of the bolt engagements on the one side slide on the beveled surfaces of the mating protrusions on the barrel until the beveled surfaces of the shutter engagements on the other side Do not rest against the sloping surfaces of the reciprocal protrusions on the trunk.

The technical result provided by the given set of features is the creation of a design for locking the rotary bolt, which ensures a uniform load distribution between the bolt engagements during firing, regardless of the angle between the bolt axis and the barrel axis.

As an example, the drawing shows the design of the rotary shutter locking assembly with two beveled combat protrusions of the shutter (pos. 2) and, accordingly, with two beveled reciprocal protrusions on the barrel (pos. 1). The operation of the locking unit is given above. The angle of rotation of the shutter is about 90 °.

Claims (2)

1. The node locking the rotary bolt of a firearm with beveled combat ledges, containing the combat protrusions of the rotary bolt and the response protrusions on the barrel, characterized in that the contacting surfaces of the combat protrusions of the bolt and the response protrusions on the barrel are made beveled relative to the perpendicular to the axis of the barrel, which when fired leads to install the combat protrusions of the shutter in a position that provides a uniform distribution of loads between the combat protrusions of the shutter. 2. The rotary shutter locking assembly according to claim 1, characterized in that the contacting surfaces of the combat projections of the shutter and the reciprocal protrusions on the barrel are rounded inward or outward.

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