RU204818U1 - METAL CASE FOR CARTRIDGES FOR SMOOTH BARRELED WEAPONS - Google Patents

Abstract

The utility model relates to ammunition, namely to metal sleeves for smooth-bore weapons. A metal sleeve for cartridges for smooth-bore weapons contains a body, a muzzle and a bottom part. The body of the sleeve is made in the form of a truncated cone with a taper of more than 1:50, and the muzzle is made of a cylindrical shape with a length of no more than 0.3 of the total length of the sleeve. The technical result is to increase the accuracy of fire. 1 wp f-ly, 2 dwg.

Description

The utility model relates to the field of production of ammunition for smooth-bore, for example, hunting weapons.

Known metal sleeve for cartridges for smooth-bore weapons (patent of the Russian Federation for utility model No. 736, IPC F42B 05/28, publ. 08/16/1995), including a steel cylindrical body, capsule socket, three ignition holes located at an angle of 120 degrees around the periphery capsule socket, while the thickness of the bottom is 6-8 wall thickness of the sleeve body. At the end of the sleeve there is a flange for extracting the sleeve after firing.

The disadvantages of the known liner are the difficulty of extracting the liner after firing due to the fact that the outer surface of the liner is cylindrical, which creates significant efforts to extract the liner after exposure to the pressure of the powder gases in the barrel bore during the firing process. In addition, the disadvantages of the known solution include the limitation on the power of the shot due to the use of the cylindrical shape of the sleeve.

The closest analogue of the utility model is a metal sleeve for cartridges for smooth-bore weapons (patent of the Russian Federation for utility model No. 154057, IPC F42B 05/28, publ. 08/10/2015), including a body that is made in the form of a truncated cone with a taper ranging from 1:35 to 1:25.

The disadvantage of the known solution is that the bullet is fastened only by the edge of the muzzle of the cone sleeve. Such fastening of the bullet leads to a large spread in the values of the force of extracting the bullet from the sleeve. The narrow anchorage zone of the bullet also leads to the possibility of an uneven positioning of the bullet. Both disadvantages lead to a deterioration in the accuracy of fire. In addition, the basing of such a bullet with the front end located on the muzzle of the sleeve makes it necessary to maintain the geometric dimensions of the muzzle within tight limits, which is technically difficult and, moreover, not economically viable.

The technical problem solved by the utility model is the creation of a sleeve that provides increased accuracy of firing smooth-bore weapons while maintaining the possibility of increasing the energy of the shot compared to cartridges with a cylindrical sleeve.

The technical result obtained by solving the problem posed consists in increasing the accuracy of the bullet basing, increasing the accuracy of fire with an increase in the shot power of a smooth-bore weapon.

The technical result is achieved due to the fact that in a metal sleeve for cartridges for smooth-bore weapons, containing a body, a mouthpiece and a bottom part, the sleeve body is made in the form of a truncated cone with a taper of more than 1:50, the other, the front part of the sleeve - the sleeve is cylindrical with a length no more than 0.3 of the total length of the sleeve. In addition, between the front cylindrical part of the sleeve (mouthpiece) and the part of the sleeve having the shape of a truncated cone (body), in the particular case of execution, a conical step with a height h of no more than 0.05 of the diameter of the mouthpiece can be made, i.e. from the diameter of the outer diameter of the cylindrical part of the sleeve, most preferably h = 0.035 ÷ 0.05.

The execution of the case of the case with a taper of more than 1:50 allows you to create the necessary conditions for the extraction of the case from the chamber of the weapon after a high-power shot.

The execution of the sleeve in the area of the barrel of a cylindrical shape allows to increase the accuracy of the bullet basing due to the coaxiality of the bullet and the sleeve, which ensures an increase in the accuracy of fire. In addition, this solution makes it possible to increase the force of extracting the bullet from the assembled cartridge, which leads to an improvement in the stability of the characteristics of the cartridges, such as the pressure of the powder gases and the speed of the bullet. It also has a positive effect on the accuracy of fire.

To maintain a balance between the implementation of the taper to increase the power of the ammunition and the presence of a cylindrical part that ensures the correct position of the bullet, the length of the cylindrical part of the sleeve (muzzle) should not exceed 0.3 of the total length of the sleeve. Increasing the length of the cylindrical part of the sleeve over the specified limit increases the friction force of the sleeve against the chamber walls and reduces the effect of the tapered part of the sleeve, worsening the conditions for extracting the spent sleeve. Reducing the length of the cylindrical part of the sleeve reduces the bullet basing area, which can negatively affect the bullet basing accuracy and narrows the possibilities for basing bullets of different lengths. In the particular case of execution, in order to coordinate the dimensions of the cylindrical part (mouth) and the tapered part (body) of the sleeve, it is proposed to make a tapered step between them with a difference of no more than 0.05 of the diameter of the mouth. The step is necessary to accommodate different standardized elements in one cartridge. A step of greater height leads to a disparity between the powder charge and the mass of the projectile equipment and to the complication of the manufacturing technology due to the need to perform additional transition sections.

The presence of essential features that distinguish the claimed utility model from those known from the prior art, including from the closest analogue, allows us to conclude that the claimed technical solution is new.

Compliance of the claimed utility model with the condition of patentability "industrial applicability" and confirmation of the possibility of implementing the claimed technical solution is shown on the example of a specific implementation of a cartridge case for smooth-bore weapon cartridges.

The utility model is illustrated by drawings, which show:

in fig. 1 shows a metal sleeve for cartridges for smooth-bore weapons - basic version;

in fig. 2 shows a metal sleeve for cartridges for smooth-bore weapons in a particular case of execution, with a tapered step compensating for the difference between the small diameter D1 of the tapered part and the diameter of the cylindrical part of the sleeve.

In the drawings, the numbers indicate:

1 - sleeve body, part of a metal sleeve, in the form of a truncated cone;

2 - the bottom of the metal sleeve;

3 - mouthpiece, part of a cylindrical metal sleeve;

4 - conical step.

The metal sleeve contains a body 1, a bottom part 2 and a mouthpiece 3. The body 1 of a metal sleeve has the shape of a truncated cone, and the mouthpiece 3 is cylindrical. The sleeve body 1, which has the shape of a truncated cone, is made with a diameter D in the larger base and with a diameter D1 in the smaller base facing the nozzle 3, i.e. to the front of the cylindrical liner. The overall length of the sleeve is designated L, the length of the frustoconical body 1 is designated L1.

An example of a sleeve.

Sleeve body 1 is made with a taper of 1:47, body 1 length is L1 = 36 mm, body 1 has diameters D = 12.5 mm (larger base of the truncated cone) and D1 = 11.6 mm (smaller base of the truncated cone facing the bore 3). The total length of the sleeve is L = 53 mm. Neck length is 14.7 mm.

Between the muzzle 3 of the cylindrical sleeve and the body 1, which has the shape of a truncated cone, a conical step 4 with a height of h = 0.42 mm (max) can be made, In this case, the muzzle 3 of the sleeve, which has a cylindrical shape, is made with an outer diameter of d = 10 , 8 mm.

The sleeve works as follows.

The sleeve, assembled into a cartridge containing, for example, a bullet, a primer and a powder charge is placed in the chamber of the weapon (not shown). The basing of the cartridge in the longitudinal direction in the chamber is carried out by the bottom part 2. In the process of firing the increased power by the increased pressure of the propellant gases, the sleeve is pressed against the walls of the chamber of the barrel. The presence of the taper of the case body makes it possible to improve the operating conditions of the case by reducing the efforts when extracting the case after the shot and removing the used case outside the weapon. The execution of a cylindrical sleeve in the area of the muzzle allows to increase the accuracy of the bullet basing due to the coaxiality of the bullet and the sleeve, which ensures an increase in the accuracy of fire.

Claims (2)

1. A metal sleeve for cartridges for smooth-bore weapons, containing a body, a muzzle and a bottom part, characterized in that the case of the sleeve is made in the form of a truncated cone with a taper of more than 1:50, and the muzzle is made of cylindrical shape with a length of no more than 0.3 of the total length of the sleeve ... 2. A sleeve according to claim 1, characterized in that between the barrel of a cylindrical shape and the body having the shape of a truncated cone, a conical step is made with a height of no more than 0.05 of the diameter of the barrel.

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