RU109840U1 - TRUNK - Google Patents

Abstract

 A trunk containing a channel with helical grooves and fields representing in cross section intersecting arcs of circles, characterized in that the channel has two grooves placed opposite each other.

Description

The utility model relates to the field of weapons technology and can be used in small arms.

The well-known trunk, in the channel of which an oval drilling is made ("Handbook of the hunter-athlete" edited by V.E. German, Moscow, 1954, p. 47). At the trunk of a known weapon, the cross-section is a small oval (ellipse) that goes with a helical spiral along the entire length of the barrel.

A disadvantage of the known barrel is that its ellipse section does not provide a clear and stable direction of the bullet, which results in an unstable position when it leaves the barrel, worsening accuracy and reducing the firing range.

Known barrel for rifles and pistols with helical fields and grooves (US patent No. 3786589, F41C 21/00), taken as a prototype, the channel of which contains three grooves and three fields, made in the form of intersecting arcs of circles. In this case, the grooves are located opposite the fields.

The well-known barrel for rifles and pistols has a complex structure, time-consuming to manufacture and requiring the use of complex, expensive equipment.

The objective of the claimed utility model is to simplify the design of the barrel while maintaining its high performance.

The problem is solved in that in the trunk containing the channel with helical rifling and fields representing in cross section the intersecting arcs of circles, the channel has two rifling, located opposite each other.

Using the claimed utility model will simplify the design of the device. The implementation in the barrel channel of two rifling, placed opposite each other, significantly reduce the complexity of manufacturing the barrel and eliminate the need for complex and expensive tools and equipment. The implementation of helical rifling and fields, representing in a cross section intersecting arcs of circles, provides the device with high performance. When firing a bullet, getting into the barrel, smoothly cuts into the rifling, which gives it the necessary direction and a stable position when flying out of the barrel, which provides the necessary flight range and high accuracy of fire.

The claimed utility model is illustrated in the drawing, which shows:

- figure 1 - trunk in the context;

- figure 2 - section aa in figure 1.

The barrel 1 (Fig. 1) has a channel 2 in which two helical grooves 3 (Fig. 2) and two helical fields 4 are made. The grooves 3 and fields 4 represent in cross section intersecting arcs of circles. Rifling 3 is made in the form of arcs of a circle of diameter dн, and field 4 in the form of arcs of a circle of diameter dн. In this case, the grooves 3 are located opposite each other and, accordingly, the fields 4 are also located opposite each other. The centers 5 of the radii of the arcs of fields 4 are shifted along the axis of symmetry from the center of the diameter dн. The arched surfaces of the grooves 3 and the fields 4 are made intersecting along lines 6 (figure 1).

During the shot, a bullet (not shown in the drawing) enters the channel 2 of the barrel 1 and moves along it under the influence of powder gases. In this case, the bullet fills the grooves 3 due to the deforming effect of the fields 4 on it, which have a diameter dp (FIG. 2) less than the diameter of the bullet. Helical fields 4 and rifling 3 give the pool the necessary rotational movement.

Claims (1)

A trunk containing a channel with helical grooves and fields representing in cross section intersecting arcs of circles, characterized in that the channel has two grooves placed opposite each other.