CN108120340B

CN108120340B - shotgun rigid shell withdrawing mechanism and shell withdrawing method

Info

Publication number: CN108120340B
Application number: CN201711372188.2A
Authority: CN
Inventors: 胡永勇; 黄宜民; 龚会; 唐成刚; 沈潇; 武旭飞; 王太平; 彭璐; 赵宏发
Original assignee: Chongqing Construction Industry (group) Co Ltd
Current assignee: Chongqing Construction Industry (group) Co Ltd
Priority date: 2017-12-19
Filing date: 2017-12-19
Publication date: 2020-01-31
Anticipated expiration: 2037-12-19
Also published as: CN108120340A

Abstract

The invention provides a shotgun rigid shell withdrawing mechanism, which comprises a case body, a shell withdrawing hook and a shell withdrawing tappet, wherein the shell withdrawing hook is arranged on the case body side, the shell withdrawing tappet is arranged on the case body and on the side opposite to the shell withdrawing hook, the inner side of the end part of the shell withdrawing hook is provided with an inward claw part which is used for hooking a shell withdrawing groove on the side, close to the bottom , of a shell and pulling the shell in the direction far away from the shell, the top part of the shell withdrawing tappet is provided with a step corresponding to the claw part of the shell withdrawing hook, and a flat disc at the lower part of the step is an inclined plane which is provided with a chamfer.

Description

shotgun rigid shell withdrawing mechanism and shell withdrawing method

Technical Field

The invention relates to an automatic weapon shell-withdrawing mechanism and a shell-withdrawing method, in particular to a shotgun rigid shell-withdrawing mechanism and a shell-withdrawing method.

Background

At present, the cartridge case of an automatic weapon is moved out of a gun bore in a mode that the bottom of a common cartridge case is sections of a cylindrical part with annular ejection grooves, the head of the automatic weapon is provided with cylindrical bottom sockets, the bottom cylinder of the cartridge case and the ejection grooves 1 can just fall into the cartridge bottom sockets, a cartridge pull hook is arranged on the side of the cartridge bottom socket, the claw part of the cartridge pull hook is just embraced in the ejection grooves 1 at the bottom of the cartridge case, when the cartridge is ejected, the automatic weapon moves backwards under the driving of gunpowder gas or pulling force, and the cartridge case moves backwards from the gun bore until being completely moved out of the gun bore along with the automatic under the limitation of the cartridge pull hook.

A shell throwing mechanism for a gun is composed of a casing, a pull hook spring, and a shell throwing lifter, and features that after the shell is taken out of the gun, it collides with the window or the gun body and flies out of the casing.

As shown in fig. 1, the diameter of a small-caliber common bullet is generally small (about 10 mm), and the bottom edge 11 of the ejection slot is a plane. As shown in fig. 3, which is a schematic diagram of a common ejection shell, if the acting force of the ejection hook on the bottom edge 11 of the ejection slot is F, the reaction force of the bottom edge of the ejection slot on the ejection hook tends to force the ejection hook 4 to cling to the bottom edge of the ejection slot clockwise around the axis 7 of the ejection hook, i.e., "self-locking". However, the shotgun shell has a large diameter (about 22.5 mm), and its structure is shown in fig. 2, the bottom edge of the ejection slot of the shotgun shell is a 110 ° inclined plane, which is difficult to achieve "self-locking" due to the shape structure and weight limitation, and the reaction force of the force F forces the pull hook to rotate counterclockwise around the pull hook shaft, which tends to separate the pull hook 4 from the shell (see fig. 4).

When withdrawing a conventional cartridge case, the force F of the draw hook on the case is perpendicular to the plane of the rim of the withdrawal slot, while when withdrawing a shotgun case, the force F of the draw hook on the case forms an angle α with the plane of the rim of the withdrawal slot, which force F can be resolved into a force F1 perpendicular to the plane of the rim of the withdrawal slot and a force F2. parallel to the plane of the rim of the withdrawal slot, acting in combination with the reaction force of the component F2, which force does not "self-lock" and accelerates the separation of the shotgun case from the draw hook, so that the energy taken up by the case is reduced, as shown in FIG. 5, during the withdrawal process the edge at the top of the withdrawal lifter 2 is always in contact with the bottom face of the case, the case rotates counterclockwise under the action of the draw hook and the withdrawal lifter, and the case moves downward due to the component F2, even if the hook spring force of the draw hook spring is large enough to stop the rotation of the case, the case moves down at a very small distance L-t, where the draw hook moves away from the case-retracting position L0, where the moment L-t of the withdrawal of the moment L-pull hook moving of the withdrawal.

Therefore, the shell withdrawing of the shotgun is obviously different from that of the common shell, under the same gun recoil speed V0, the shell withdrawing energy of the shotgun shell is smaller, the anti-jamming capability of the shell is poor, the flight is unstable, the subsequent shell throwing reliability is reduced, and the shell clamping fault is easy to occur. Therefore, there is a need for a mechanism and method for mechanically optimizing and improving the shell removing mechanism and the shell removing method of the shotgun.

Disclosure of Invention

In response to the deficiencies of the prior art, the present invention provides rigid firearm decladding mechanisms that increase the firearm decladding power and reliability.

Another object of the present invention is to provide methods of rigid firearm ejection that increase the firearm ejection energy and reliability.

The technical scheme of the invention is as follows:

shotgun rigidity shell withdrawing mechanism comprises a case body, a shell withdrawing hook and a shell withdrawing tappet, wherein the shell withdrawing hook is arranged on the case body side, the shell withdrawing tappet is arranged on the case body at the side opposite to the shell withdrawing hook, the inner side of the end part of the shell withdrawing hook is provided with an inward claw part which is used for hooking a shell withdrawing groove on the side, close to the bottom , of a cartridge case and pulling the cartridge case in the direction far away from the cartridge case, the key is that the top of the shell withdrawing tappet is provided with a step corresponding to the claw part of the shell withdrawing hook, and the lower flat disc of the step is an inclined plane which is arranged to be a chamfer.

shotgun rigid shell withdrawing methods are characterized in that the top of a shell withdrawing tappet is arranged to be of a step structure, a flat disc at the lower part of a step is provided with a chamfer inclined plane, so that under the pulling of a shell pulling hook during shell withdrawing, the side edge of the bottom end face of a shell is in contact with the inclined plane, the end face of the bottom of the shell, close to the side edge, is in contact with the slope top line of the step, then the side edge of the bottom end face of the shell collides with the inclined plane under the pulling of the shell pulling hook, the end face of the bottom of the shell, close to the side edge, collides with the slope top line of the step, the shell rotates around the slope top line of the step for a fixed angle, and moves sections along the.

According to the invention, through improvement of the ejection support, the top of the ejection support is arranged to be of a step structure, and the lower flat disc of the step is arranged to be an inclined plane, so that under the pulling of the ejection hook during ejection, the side edge of the bottom end surface of the cartridge case is always in contact with the inclined plane of the step flat disc, the end surface of the bottom of the cartridge case close to the side edge is always in contact with the slope top line of the step, then the side edge of the bottom end surface of the cartridge case collides with the inclined plane under the pulling of the ejection hook, the end surface of the bottom of the cartridge case close to the side edge always collides with the slope top line of the step, the cartridge case rotates fixed angle around the slope top line of the step and finishes ejection after moving for sections of distance along the inclined plane.

In conclusion, the invention changes the action relationship between the shell and the shell withdrawing jack, increases the shell withdrawing energy, ensures the shell withdrawing of the shotgun to be reliable, and further ensures the stable shell throwing route. The invention has the advantages of simple structure and convenient implementation, can be improved on the existing shell-withdrawing tappet of the shotgun, and can also produce a new shell-withdrawing tappet to replace the shell-withdrawing tappet of the existing shotgun.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the background, reference will now be made briefly to the drawings which are used in the detailed description or the prior art, wherein like elements or portions are generally identified by like reference numerals throughout the drawings, and wherein the elements or portions are not drawn to scale.

FIG. 1 is a schematic diagram of a conventional cartridge case mechanism in the background art;

FIG. 2 is a schematic view of a shell structure of a background art shotgun;

FIG. 3 is a schematic diagram of the ejection of a conventional cartridge case in the prior art;

FIG. 4 is a schematic illustration of a background art shotgun shell removal;

FIG. 5 is a schematic illustration of an analysis of a prior art shotgun in advance of ejection from the shell;

FIG. 6 is a schematic structural diagram of the present invention in an embodiment;

FIG. 7 is a schematic illustration of the shelling process of the present invention in an exemplary embodiment;

FIG. 8 is a schematic structural view of an ejector beam according to the present invention;

in the drawings: 1-a shell removing groove; 11-the bottom edge of the shell removing groove; 2-removing the shell and erecting; 21-inclined plane; 22-the top slope line; 3-machine box body; 4-pulling the shell hook; 5-cartridge case; 6-pulling the shell hook spring; 7-pulling the shell hook shaft.

Detailed Description

Embodiments of the present invention are described in further detail below with reference to the drawings.

In the present embodiment, the terms "upper", "lower", "left", "right", "front", "rear", "upper end", "lower end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, or be operated, and thus, should not be construed as limiting the present invention.

As shown in fig. 6, 7 and 8, shotgun rigidity shell withdrawing mechanisms comprise a case body 3, a shell pulling hook 4 and a shell withdrawing tappet 2, wherein the shell pulling hook 4 is installed on the case body 3 side, the shell withdrawing tappet 2 is installed on the case body at the side opposite to the shell pulling hook 4, the inner side of the end part of the shell pulling hook is provided with an inward claw part which is used for hooking a shell withdrawing groove on the side of the bullet case close to the bottom during shell withdrawing, the top of the shell withdrawing tappet corresponding to the claw part of the shell pulling hook is provided with a step structure, and the lower flat disc of the step is an inclined plane 21 for forming a chamfer.

As shown in fig. 6, 7 and 8, a step is arranged on the case withdrawing support, and an chamfer 21 forming a chamfer is arranged on the lower flat disc of the step, so that under the pulling of the case pulling hook during case withdrawing, the side edge of the bottom end face of the cartridge case is in contact with the chamfer 21, the end face of the bottom of the cartridge case close to the side edge is in contact with the top slope line 22 of the step, then under the pulling of the case pulling hook, the side edge of the bottom end face of the cartridge case collides with the step chamfer 21, the end face of the bottom of the cartridge case close to the side edge collides with the top slope line, and the cartridge case rotates around the top slope line 22 and moves end distance along the chamfer 21 to complete case withdrawing.

Assuming that the bolt and the cartridge case move at a constant speed in the process of ejecting the cartridge case, and the force analysis is shown in fig. 6 at the moment that the cartridge case 5 collides with the ejection support 2, wherein N1 is the acting force of the inclined plane to the side of the bottom end face of the cartridge case, N is the acting force of the top slope line to the end face of the cartridge case bottom close to the side, F is the acting force of the draw hook to the bottom edge of the ejection slot of the cartridge case, and F1 and F2 are component forces of F. At the moment, the stress N is F1, the stress N1 is F2, the cartridge case is only acted by the counterclockwise moment M is N X X, the end surface of the cartridge case bottom close to the side edge is contacted with the slope top line of the step, the end surface rotates counterclockwise by taking the slope top line as a fulcrum, and the side edge of the cartridge case bottom end surface moves along the inclined plane. As shown in fig. 8, when the bullet case is separated from the draw hook, the distance L that the bolt needs to move is far longer than the original distance L ', the rotation angle of the bullet case from the position a to the position b' is obviously increased, the acceleration time of the bullet case by the draw hook is prolonged, and the energy obtained by the bullet case is higher.

In conclusion, the invention changes the action relationship between the shell and the shell withdrawing lifter, so that the shell withdrawing of the shotgun is reliable, and the shell throwing route is stable. The invention has the advantages of simple structure and convenient implementation, can be improved on the existing shell-withdrawing tappet of the shotgun, and can also produce a new shell-withdrawing tappet to replace the shell-withdrawing tappet of the existing shotgun.

As shown in fig. 8, in order to avoid the problem of early shell throwing caused by too early cartridge case contact with the m point (see fig. 6) at the end of the lower flat plate of the shell-withdrawing and erecting step, the downward inclination of the step surface 21 towards the muzzle direction can be adjusted or structures such as an arc shape and the like can be adopted to achieve the same purpose. In addition, the spring piece is adopted to replace an inclined step surface, so that the effect of improving the shell withdrawing energy is more obvious.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; these modifications and substitutions do not cause the essence of the corresponding technical solution to depart from the scope of the technical solution of the embodiments of the present invention, and are intended to be covered by the claims and the specification of the present invention.

Claims

The shell removing method of the rigid shell removing mechanism of the shotgun of 1 and is characterized in that:

the cartridge case comprises a cartridge case body, a cartridge case hook and a cartridge case withdrawing tappet, wherein the cartridge case hook is arranged on the side of the cartridge case body, the cartridge case withdrawing tappet is arranged on the side of the cartridge case body opposite to the cartridge case hook, the inner side of the end part of the cartridge case hook is provided with an inward claw part which is used for hooking a cartridge case withdrawing groove close to the bottom side during cartridge case withdrawing and pulling the cartridge case in the direction far away from the cartridge case, the top of the cartridge case withdrawing tappet is provided with a step corresponding to the claw part of the cartridge case hook, and the lower flat disc of the step is an inclined plane which is arranged to be a chamfer;

the top of the withdrawing support is set to be of a step structure, the lower flat disc of the step is provided with an inclined plane forming a chamfer, so that under the pulling of a casing pulling hook during withdrawing, the side of the bottom end face of the cartridge casing is contacted with the inclined plane, the bottom of the cartridge casing is close to the end face of the side and contacted with the slope top line of the step, then under the pulling of the casing pulling hook, the side of the bottom end face of the cartridge casing is collided with the inclined plane, the end face of the side close to the bottom of the cartridge casing is collided with the slope top line of the step, the cartridge casing rotates fixed angles around the slope top line of the step, and the withdrawing is completed after the end is moved along the.