CZ310075B6 - An assembly of a barrel, a container/frame and a breech for self-loading guns - Google Patents

Abstract

The assembly of a barrel (2), a container/frame (4) and a breech (1) for self-loading guns with a breech mechanism lockable by lowering the barrel, whereas the barrel (2) and the breech (1) are movably mounted in the container/frame (4), and the barrel (2) has a front part (205) and the rear part (206), where under the rear part (206) there is a link (201) of the barrel and in the area of the link (201) of the barrel there is a hook (401) on the container/frame (4) (401), lies in the fact that the link (201) of the barrel consists of a recess, which includes the front sloping control surface (202), which transits into a locking support (203) and with a distance there is at least one seating surface (204) at least around a part of the locking support (203) for stopping the motion of the barrel (2). The hook (401) includes a lip (402) for coaction with the control surface (202) of the link (201) of the barrel and the lip (402) is followed by a shaped surface (403) for the coaction with a locking support (203) of the link (201). Around at least part of the shaped surface (403) there is at least one stop surface (404) to absorb the impact of the barrel (2), where the stop surface (404) is oriented towards the shaped surface (403) in such way that in the fully unlocked state of the barrel (2) the stop surface (404) of the hook (401) is seating on the stop surface (204) of the link (201), while there is a clearance between the control surface (202) and the locking support (203) of the link (201) of the barrel on one sides and the face of the lip (402) and the shaped surface (403) of the hook (401) on the other side.

Description

Barrel, container/frame and slide assembly for self-loading pistols

Field of technology

The invention relates to a barrel, container/frame, and breech assembly for self-loading pistols having a drop-locked breech mechanism, wherein the barrel and breech are movably housed in the container/frame, the barrel having a front and a rear portion, and a barrel slide arranged below the rear portion and a hook is arranged on the container/frame in the area of the barrel's scenery.

Current state of the art

Self-loading pistols locked by the drop of the barrel (Browning-Colt) are a proven and advanced solution. However, for applications of this mechanism for the purposes of high-performance cartridges, such as the 9x19mm NATO in its high ballistic performance mutations, the problem arises of a large excess of recoil energy inside the pistol mechanism, especially in the region of the barrel stop, i.e. at the point, in which the barrel stops its movement during its short slide.

The shutter mechanism locked by the drop of the barrel (Browning-Colt) is based on the recoil drive due to the effect of the shot. When the shot is fired, the barrel is locked to the breech. Due to the recoil of the shot, the barrel together with the bolt makes a short common, usually linear movement, referred to as a short recoil. The length and time of this movement is designed so that during it the bullet leaves the barrel. Then the unlocking of the barrel is started. Once the barrel is unlocked, its movement is stopped and only the bolt continues to move.

A technical problem occurs with ballistically powerful cartridges, namely a problem in the area of stopping the movement of the barrel. Such powerful cartridges transfer such an amount of energy to the whole "barrel-breech" breech system that the barrel at the moment when it needs to be stopped still has so much energy that in the case of the traditional solution (Browning-Colt) excessive recoil occurs. This shock is so significant that it significantly reduces the achievable cyclic life of both the barrel and its stop (usually the frame, possibly the container or block inside the frame).

Documents DE 4109777 A1 (1.10.1992), DE 4341131 C1 (2.2.1995), US 5309815 A (10.5.1994) and US 5581046 A (3.12.1996) describe the solution used in the Heckler & Koch model HK USP and P30 pistols . This solution reduces the recoil from stopping the movement of the barrel by braking the barrel through an axially sliding member of the recoil system. Braking is provided by springs from the return system. The end of braking is defined by the impact of the axial member on the pin in the frame. This solution is therefore mechanically essentially a spring buffer.

Documents US 5741996 A (21.4.1998) and CZ 296116 B6 (9.11.2005) describe the solution used in the Ruger P95 and P97 pistols. This solution is in principle similar to the Heckler & Koch pistol solution described above, with the difference that the axially sliding member is not braked by springs, but the shock is absorbed into the plastic frame.

Document US 7103998 B2 (12.9.2006) describes a modified solution for use with a slide guide in a plastic frame, which is used in the Ruger P345 pistol.

Document US 20220341687 A1 (27.10.2022) describes the FN Herstal solution, which basically uses a closed barrel slide (type SIG P210 or type CZ 75). The energy absorption of the barrel stop is carried out via a transverse pin, which is stored in a container (block) and this is stored in a plastic frame. At the same time, the transverse pin serves as a control pin for locking the unlocking of the barrel.

The aim of the invention is to design such a mechanism, which in a pistol locked by the drop of the barrel

- 1 CZ 310075 B6 will reduce the shock from the recoil of the barrel and the shock from the landing of the bolt in the rear dead center so that this shock is not concentrated in the same areas, or places on the given parts of the barrel, frame, or container, block. At the same time, the solution must be simple for both production and operation.

The essence of the invention

Said object is achieved by a barrel, container/frame, and breech assembly for a self-loading pistol with a breech-locked breech mechanism, wherein the barrel and breech are movably housed in the container/frame, the barrel having a front and a rear, and a slide is arranged below the rear barrel and in the area of the barrel breech, a hook is arranged on the container/frame, according to the invention, the essence of which is that the barrel breech is formed by a recess that includes a forward inclined control surface that passes into the locking support and is spaced around at least part of the locking support arranged at least one landing surface to stop the movement of the barrel. The hook includes an edge for interaction with the control surface of the barrel slide, and the edge is followed by a shaped surface for interaction with the locking support of the slide. At least one stop surface is arranged around at least part of the shaped surface for absorbing the impact of the barrel. The stop surface is oriented with respect to the shaped surface in such a way that, in the fully unlocked state of the barrel, the stop surface of the hook rests on the bearing surface of the slide, while there is a clearance between the control surface and the locking support of the slide of the barrel on one side and the face and the shaped surface of the hook on the other side.

The advantage of the solution according to the invention is that the recoil is distributed and is not concentrated in the same areas as with the solution according to the state of the art. This is achieved by separating the barrel unlock/lock function from the barrel/frame stop function. This results in a significant increase in the cycle life of the components, especially the barrel and gun container/frame.

According to a preferred embodiment, the stop surfaces are two and are arranged on both sides of the shaped surface, and the corresponding abutment surfaces are also two and are arranged on both sides of the locking support.

Clarification of drawings

The invention will be described in more detail on the example of a specific embodiment of the assembly according to the invention, shown in the attached images, in which the individual images represent:

Fig. 1 - the barrel of the assembly according to the invention with the barrel slide;

Fig. 2 - detail of the gun barrel with control surface and locking support (in a rectangular projection);

Fig. 3 - detail of the gun barrel with landing surface (in a rectangular projection);

Fig. 4 - detail of the scenery mainly in 3D view;

Fig. 5 - detail of the scenery, mainly in 3D view;

Fig. 6 - frame/container of the assembly according to the invention with a hook;

Fig. 7 - detail of the hook in the frame/container (in a rectangular projection);

Fig. 8 - detail of hook with blade, shaped surface and stop surfaces in 3D view;

Fig. 9 - section of the assembly according to the invention in the plane of the control surface and the edge of the weapon ready for firing;

-2CZ 310075 B6 Fig. 10 - cross-section of the assembly according to the invention in the plane of the bearing surface and the stop surface of the weapon ready for firing;

Fig. 11 - section of the assembly according to Fig. 9 at the moment of the shot and the backward movement of the barrel and bolt;

Fig. 12 - section of the assembly according to Fig. 10 at the moment of the shot and the backward movement of the barrel and bolt;

Fig. 13 - section of the assembly according to Fig. 9 at the beginning of unlocking the barrel;

Fig. 14 - section of the assembly according to Fig. 10 at the beginning of unlocking the barrel;

Fig. 15 - section of the assembly according to Fig. 9 when the barrel is stopped;

Fig. 16 - section of the assembly according to Fig. 10 when the barrel is stopped;

Fig. 17 - section of the assembly according to Fig. 9 when the bolt is stopped in the rear dead center;

Fig. 18 - section of the assembly according to Fig. 10 when the bolt is stopped in the rear dead center;

Fig. 19 - detail D from Fig. 15, or 17; and Fig. 20 - detail D from Fig. 16, respectively 18.

Examples of implementation of the invention

The assembly according to the invention is suitable for self-loading pistols with a closing mechanism, locked barrel drop, which can have a plastic frame and container (block), or an all-metal frame and thus do not have a container/block. Hence, this component is referred to as container/frame 4.

The barrel 2 and the bolt 1 are movably stored in the container/frame 4.

The barrel 2 has a front part 205 and a rear part 206, under which the barrel slide 201 is arranged (see Fig. 1). A hook 401 (see Fig. 6) is arranged on the container/frame 4 in the region of the barrel's scenery 201.

The barrel slide 201 is formed by a recess that includes a forward inclined control surface 202 that passes into the locking support 203 (see Figs. 2, 4 and 5) and at least one abutment surface 204 is arranged at a distance around a part of the locking support 203 to stop the movement of the barrel 2 (see Fig. 3). In the illustrated embodiment, there are two seating surfaces 204 and they are arranged symmetrically around the locking support 203 (see Fig. 4).

The hook 401 on the container/frame 4 includes a blade 402 for interacting with the control surface 202 of the slide 201 of the barrel, and the blade 402 is followed by a shaped surface 403 for cooperating with the locking support 203 of the slide 201. while at least one stop surface 404 is arranged around at least part of the shaped surface 403 for absorbing the impact of barrel 2. In the shown embodiment, there are two stop surfaces 404 and they are arranged symmetrically around the shaped surface 403 (see Fig. 8).

The stop surfaces 404 are oriented with respect to the shaped surface 403 in such a way that in the fully unlocked state of the barrel 2, the stop surfaces 404 of the hook 401 abut on the abutting surfaces 204 of the slide 201, while between the control surface 202 and the locking support 203 the slide 201 of the barrel on one side and the face of the blade 402 and the shaped surface 403 of the hook 401 on the other side is the clearance.

-3 CZ 310075 B6

In the pairs of images described below, in the first image, the weapon with the assembly according to the invention is always shown in section with the control surface 202 and the blade 402, while in the second image this assembly is in the same position, but in section with the bearing surface 204 and the stop surface 404.

In Fig. 9 and 10, the assembly according to the invention is shown in a state where the weapon is ready for firing. Barrel 2 is locked into breech 1.

Fig. 11 and 12 show the weapon during a shot, when the bolt 1 with the barrel 2 starts to move backwards due to the action/reaction from the acceleration of the bullet in the barrel 2. The bolt 1 with the barrel 2 thereby acquires considerable kinetic energy.

Figures 13 and 14 show the weapon at the start of barrel unlocking 2. The control surface 202 comes into contact with the blade 402 and thus the controlled barrel unlocking 2 begins.

Figures 15 and 16 show the weapon at a stoppage of the barrel 2. The kinetic energy of the barrel 2 is consumed by stopping its movement. Conclusion 1 continues to move and perform its other known actions. Such a sudden and rapid stop of the barrel 2 causes a significant shock stress in the regions of the barrel 201 and the hook 401, which can lead to undesired premature destruction. This is the first dominant source of load for the entire region of the barrel 201 and the hook 401. The solution according to the invention reduces this load by splitting the load into several surfaces. For the barrel 2, this is achieved by dividing the breech area 201 into a control section consisting of a control surface 202 and a locking support 203, which controls the locking/unlocking of the barrel 2, and a bearing surface 204, which absorbs shock. For the container/frame 4, this is also achieved by dividing the hook area 401 into a control part consisting of a blade 402 and a shaped surface 403 and a stop part consisting of a stop surface 404. Detail D from Figure 15 and 16 is shown in Figure 19, 20.

Figures 17 and 18 show the weapon with the bolt 1 stopped at rear dead center. The kinetic energy of bolt 1 is released by stopping it in the rear functional dead center. This is a second source of load for the whole area of the barrel 201 and the hook 401. Such a sudden and quick stop of the bolt 1 causes a shock stress in the regions of the barrel 201 and in the region of the hook 401, which again can lead to unwanted destruction. The solution according to the invention reduces this load by breaking it down into multiple surfaces. Limiting and reducing the effect of this load works identically to the case of Barrel Stop 2 described with reference to Figure 15 and 16.

The solution according to the invention (see fig. 19 and 20) ensures that the control surface 202, the locking support 203, the edge 402 and the shaped surface 403 are loaded only by the control contact controlling the locking/unlocking of the barrel 2 and are not loaded in any way even by shocks from the stop of the movement of the barrel 2 (the first dominant source of load) nor shocks from the stop stop of the bolt movement 1 (the second source of load). According to the invention, this is achieved by stopping the barrel 2 (see fig. 15, 16) or stop of shutter 1 (see fig. 17, 18), the contact between the seating surface 204 and the stop surface 404 is guaranteed by means of dimensioning and tolerances. At the same time, the clearance between the remaining control parts is guaranteed again by means of dimensioning and tolerances, i.e. between the control surface 202, the edge 402 and the locking support 203, the shaped surface 403.

In the fully unlocked state of the barrel 2, the stop surface 404 of the hook 401 rests on the bearing surface 204 of the slide 201, while there is a clearance between the control surface 202 and the locking support 203 of the slide 201 of the barrel on one side and the face of the blade 402 and the shaped surface 403 of the hook 401 on the other side.

Claims (2)

1. Assembly of barrel (2), container/frame (4) and slide (1) for self-loading pistols with a slide-locked slide mechanism, wherein the barrel (2) and slide (1) are movably housed in the container/frame (4), wherein the barrel (2) has a front part (205) and a rear part (206), where a barrel slide (201) is arranged under the rear part (206) and a hook is arranged on the container/frame (4) in the area of the barrel slide (201) (401), characterized in that the slide (201) of the barrel is formed by a recess that includes a front inclined control surface (202) that passes into the locking support (203) and with a distance at least around a part of the locking support (203) is arranged at least one a bearing surface (204) for stopping the movement of the barrel (2), while the hook (401) includes a blade (402) for interaction with the control surface (202) of the slide (201) of the barrel, and the blade (402) is followed by a shaped surface (403) for interaction with the locking support (203) of the slide (201), whereby at least one stop surface (404) is arranged around at least part of the shaped surface (403) for absorbing the impact of the barrel (2), where the stop surface (404) is oriented with respect to the shaped surface (403) ) so that in the fully unlocked state of the barrel (2) the abutment surface (404) of the hook (401) rests on the bearing surface (204) of the slide (201), while between the control surface (202) and the locking support (203) of the slide (201) mainly on one side and the face of the blade (402) and the shaped surface (403) of the hook (401) on the other side has clearance. 2. Assembly according to claim 1, characterized in that there are two stop surfaces (404) and are arranged on both sides of the shaped surface (403) and the corresponding abutting surfaces (204) are also two and are arranged on both sides of the locking support (203 ).