EP4038337A1

EP4038337A1 - Barrel unit for a firearm

Info

Publication number: EP4038337A1
Application number: EP20775879.8A
Authority: EP
Inventors: Andreas Wutte
Original assignee: Glock Technology GmbH
Current assignee: Glock Technology GmbH
Priority date: 2019-10-04
Filing date: 2020-09-28
Publication date: 2022-08-10
Anticipated expiration: 2040-09-28
Also published as: US20220341695A1; EP4038337B1; EP4038336B1; CA3152033A1; US20210164750A1; US12092413B2; WO2021063876A1; EP4038337C0; EP3800434B1; US20220341696A1; US11333460B2; US11841201B2; EP3800434A1; IL290580A; EP3800434C0; BR112022003239A2; BR112022003017A2; CA3156638A1; IL290874A; EP4038336A1

Abstract

The invention relates to a barrel unit for a firearm, comprising a barrel (1) and a locking sleeve (3), the locking sleeve (3) having locking lugs (31) extending inward and barrel locking lugs (35) likewise extending inward. The barrel (1) has, on the outer surface thereof, a control path (16) for interaction with a control cam (36) arranged on the locking sleeve (3). The control path (16) comprises two portions, the first beginning at the barrel end and running parallel to the bore axis (11), the second being formed around the bore axis (11) in the circumferential direction at least in some sections. The second portion has a clamping surface (161) having a shape complementary to the control cam (46), the control cam and/or the clamping surface (161) being designed to be preloaded against one another in the radial direction in order to fix the barrel (1) in a predefined end position.

Description

Barrel unit for a firearm

The invention relates to a barrel unit for a firearm comprising a barrel and a locking sleeve, which are detachably connected to one another and subsequently to the housing, mostly the upper housing part, and the connection of the two parts, according to the preamble of claim 1.

In the application and the claims, the term firearms is understood to mean, in addition to carbines, repeating rifles, rifles, long guns, and the like; in principle, handguns can also be meant, but for reasons of easier readability, only carbines are usually referred to.

In recent years, the military and police, but also civilian users, have been increasingly demanding that it must be possible to exchange the barrel of a carbine without great effort. This can be done, for example, in order to be able to use barrels of different lengths, or barrels with different calibers, in which the barrel axis, the core, maintains its position in the housing (upper part) for each caliber. In the latter case, changes may also have to be made in the lower part of the housing, but this is not part of the invention.

Correspondingly, modern firearms often have a barrel unit which comprises at least the barrel and the locking sleeve. The running unit, in turn, can be connected to the housing, e.g. by means of a running nut, clamping mechanism, etc.

A common variant of coupling a barrel with a locking sleeve are threaded connections. The barrel has an external thread at the end of the barrel remote from the muzzle, and the locking sleeve also has a corresponding internal thread. The barrel can simply be screwed into the locking sleeve for coupling. The barrel can be secured against twisting by means of cross bolts or grub screws, etc. Such a coupling barrel with locking sleeve can be found, for example, in rifles of the type M4 / M16 / Another known variant for coupling the barrel and locking sleeve is carried out using the principle of locking lugs, as is known from, for example, rotary head locks. At the barrel end, corresponding running lugs are formed on the outside in the circumferential direction, the locking sleeve has opposing barrel locking lugs facing inwards. After the barrel has been pushed into the locking sleeve, the barrel is rotated so that the barrel lugs and barrel locking lugs are brought into overlap when viewed in the axial direction. The barrel and locking sleeve are thus secured in the axial direction. The barrel can in turn be secured against twisting, for example by means of cross bolts or grub screws, etc.

An example that follows this locking principle is the Steyr AUG, with the locking sleeve being designed as part of the housing / lock. Securing takes place here via a transverse bolt located in the housing, which is difficult to operate, especially in bad weather.

The previously known arrangements for mounting the barrel are more or less suitable for positioning the barrel in a predefined position with repeatable accuracy in the locking sleeve and thus relative to the housing of the light arm.

It is therefore the aim of the invention to create a mechanically firmly connected barrel unit comprising barrel and locking sleeve. A further object of the invention is to enable a barrel change that can be carried out as simply as possible and without tools. In addition, it is the object and aim of the invention to achieve an installation situation in which the barrel is secured against twisting in the installation situation. In addition, it is seen as an object to enable the barrel to be positioned with repeat accuracy relative to the housing. Last but not least, it is a goal to enable a simplified and thus cost-reduced production.

According to the invention, these goals are achieved by the features specified in the characterizing part of claim 1, in other words, in that the barrel unit, which consists at least of barrel and locking sleeve, has a barrel beginning on the outer surface at the barrel end and at least partially in Includes circumferential direction around the barrel axis extending control path. The control path comprises at least two sections, the first section starting at the end of the barrel and extending parallel to the barrel axis and the second section extending in the circumferential direction and the second section having a clamping surface for bracing a control cam arranged on the locking sleeve. The clamping surface and the control cam (or the surface of the control cam facing the clamping surface) are designed to be complementary in shape to one another. The second section can be directly connected to the first section, or a third connecting section can be provided therebetween.

After being rotated into the second section, the control cam comes to lie in a predefined end position, the control cam being prestressed in the radial direction in the direction of the barrel axis and the barrel being fixed in the locking sleeve. The predefined end position thus corresponds to a position of the barrel that is ready to fire and temporarily secured against rotation. The barrel is relatively easy to insert into the locking sleeve and can be rotated into the predefined end position, in which the barrel is firmly and detachably connected to the locking sleeve by bracing the control cam on the clamping surface.

This advantageous embodiment allows the barrel and locking sleeve to be connected to one another simply by inserting them into one another and turning them into the predefined end position. In the predefined end position, the barrel can transmit the forces that occur when the shot is fired to the locking sleeve, which in turn is firmly connected to the housing. While with a threaded connection the alignment in the circumferential direction strongly depends on how far the barrel is screwed into the locking sleeve, any deviations in the hit position in the horizontal and / or vertical direction can be minimized in the aforementioned manner.

If the hit position for a certain barrel is now determined and the firearm is "shot in" at a distance, the predefined end position can be used to position the barrel with repeat accuracy in the circumferential direction even after the firearm has been dismantled. If necessary and by turning in the opposite direction the barrel can be released from the locking sleeve relatively easily. No tools are required to connect and disconnect the barrel and locking sleeve.

The pretensioned lixation of the control cam on the clamping surface can be done, for example, by leather pretensioning of a leather of the control cam. The control cam can also be made of an elastic material. However, it is also possible to reverse the direction of action and, for example, to design the clamping surface (or even the clamping surface and control cam) as a spring-loaded element.

In a particularly advantageous embodiment, the clamping surface is designed as a ramp, viewed in the running direction. Viewed in the running direction, the clamping surface at one end has a different normal distance to the barrel axis than the other end. As a result, a smooth transition from the control path to the clamping surface can be achieved and the barrel can be turned particularly easily into a predefined end position. Furthermore, the clamping effect can increase in a defined manner when the ramp shape and / or slope are designed accordingly, and can thus be easily perceived by the operator.

In a further advantageous embodiment, the ramp of the clamping surface, viewed in the direction of the end of the control path, is designed to rise linearly outward in the radial direction. The clamping surface therefore rises linearly in the circumferential direction and outwards, which is advantageous in terms of production technology.

In another particularly advantageous embodiment, the second section of the control path, viewed in the running direction, can be curved, for example with at least two different curved lines, for example S-shaped. The clamping effect in the event of twisting can be specifically preset by the Lachmann by such a measure and, for example, defined differently depending on the twisting angle and / or optimized for particularly long runs with a corresponding weight.

It is also possible to design the clamping surface as a curved surface, for example as a surface that is concave relative to the running surface. This enables the clamping effect to be particularly optimized. When designed as a concave surface, i.e. viewed in the running direction, the profile of the surface appears curved and can be viewed from the Transition area to the first or any third section up to the end of the clamping surface, for example, have an inwardly directed curvature or rise discontinuously outward. In this way, it is even possible to design this concave surface in a manner similar to a detent, so that the attainment of the predefined end position is particularly easy for the operator to recognize.

In a further special embodiment, a catch for interacting with the control cam or a catch extension of the control cam is formed on the clamping surface. The detent can, for example, be designed as a small recess in the middle of the clamping surface. A correspondingly complementary locking extension on the control cam can engage in this locking when the predefined end position is reached and thus defines the end point of the twisting movement. The user can thus see particularly well when the predefined end position has been reached. The detent can also be designed as a small step at the beginning of the clamping surface which interacts with the control cam. The detent can also be designed as an end stop at the end of the control path.

In another particular embodiment, an end stop can be formed on the clamping surface. This end stop limits the possible movement of the control cam in the second section of the control path in the circumferential direction. As a result, the predefined end position is particularly easily recognized by the user, namely when the end stop is reached.

It has proven to be particularly advantageous if the first section and the second section of the control path are connected to one another by means of a connecting section or preferably directly. This shape of the control path or its first section is particularly easy to produce, since, for example, only one groove running linearly towards the rear and one groove in the circumferential direction have to be milled. This is also advantageous when the barrel and locking sleeve are guided into one another, since the barrel and locking sleeve can just be plugged into one another and rotated and the predefined end position can thus be reached. It is incumbent on the person skilled in the art to design the second section directly following the first section or, if necessary, the twisting path from the first to the second Section, and thus up to the clamping surface, to be formed by means of a connecting section in order to form the optimal position of the clamping surface relative to the first section, the insertion section. This can be used to advantage particularly when optimizing the weight of the barrel and its oscillation behavior when firing a shot.

In addition, it is particularly advantageous if the second section of the control path is formed at a right angle to a straight line parallel to the axis of the barrel core. The barrel and locking sleeve only need to be rotated against each other after they have been guided into one another in order to reach the predefined end position. A second section designed in this way can also be produced very easily as a linear groove in the circumferential direction, e.g. by means of milling, and essentially corresponds to an "L-shape" when viewed from the outside.

Lerner, a particularly favorably designed design of the running unit can have a first distance between two adjacent running lugs, which is greater than a second spacing between two adjacent running lugs. The first distance can essentially correspond to the width of the control cam. The width of the control cam must be smaller than the first distance and should be larger than the second distance. This configuration means that barrel and locking sleeve can only be pushed into one another in exactly one specific orientation, namely when the control cam is aligned with the first distance between two adjacent running lugs. If the control cam and the first distance are not covered, the control cam can be brought into overlap with the first distance by simply turning the barrel. Then the barrel can simply be inserted into the first section of the control path. Ideally, the barrel is inserted with the muzzle pointing vertically upwards and only needs to be gripped slightly above the locking sleeve so that, when the control cam is in the correct position, gravity slides into the control path by itself.

It has certainly proven to be particularly advantageous if the control cam is arranged in the locking sleeve by means of a control cam holder. The control cam can be connected to the control cam holder as a unit, i.e. as a separate "sub-assembly" be designed, which is thus installed together and at the same time in the locking sleeve. This is advantageous in terms of manufacture and handling.

Furthermore, it can be particularly advantageous if the control cam is formed integrally on the control cam holder. This reduces the number of parts, and accordingly, production is simplified and production costs are reduced. Assembly is quicker and parts that are easy to lose are avoided. For example, the control cam can be manufactured integrally on the control cam holder, e.g. as a stamped sheet metal part.

Furthermore, it is particularly advantageous if the control cam holder is designed as a spring, particularly preferably as a leaf spring, and pretensions the control cam in this way in a predefined end position against the clamping surface. A leaf spring can also be arranged in the locking sleeve when there is only a small amount of space; in addition, leaf springs are generally highly resilient and particularly wear-resistant. The spring preload causes a particularly high clamping effect in the predefined end position, which is particularly advantageous when the firearm is in operation

In a further, particularly favorable embodiment, the control cam holder can be connected to the locking sleeve in a self-clamping and releasable manner in the working position. The self-locking takes place through tight tolerances between the control cam holder and the locking sleeve and allows a connection without connecting elements such as screws, etc. and, if necessary, the control cam holder can be released from the locking sleeve and replaced. Thus, for example, small lateral extensions can be formed on the control cam holder, which are brought into a corresponding holding groove in the locking sleeve. Self-locking is achieved through the close tolerance between the extension and the retaining groove.

It is also possible and particularly advantageous that a holder stop is formed on the control cam holder for engaging in an indentation on the locking sleeve in order to secure the control cam holder in the working position in the locking sleeve. The control cam holder is thus secured against axial displacement and thus against loss from the locking sleeve. Another aspect of the invention is that the barrel has an indentation which can interact with an additional anti-twist element which is designed to be complementary in shape. Such an additional anti-rotation lock of the barrel can be implemented, for example, by means of a bolt lying transversely to the barrel axis.

It can be particularly advantageous if the additional anti-twist element is designed as a cam of a tensioning lever, which is designed to complement the shape of the indentation. The indentation can for example be designed as a flattening in the barrel. . The cam can be designed to be flattened in the transverse direction and / or the running direction. In this way, when there is contact between the barrel and the cam, force is transmitted linearly or flatly, which provides an improved anti-twist protection. This is particularly advantageous in designs which in any case connect the locking sleeve to the housing with a clamping mechanism with a tensioning lever.

It is particularly positive if, in the ready-to-fire position, the cam and the flattened area are spatially separated from one another by a gap, the gap preferably having a width of 0.02 mm to 0.4 mm, particularly preferably 0.10 mm to 0.20 mm . The gap ensures that the barrel is mounted to swing freely and is not undesirably tensioned by the cam. The anti-twist device only works in the event that the barrel is actually twisted.

The invention is suitable for firearms, therefore also for pistols, but is explained below using a carbine. Further components of the firearm, such as the barrel, cartridge chamber, locking sleeve, locking lugs, magazine or stock are not explained in more detail here, since they do not concern the core of the invention and the person skilled in the art with knowledge of the invention also here, if necessary or desired Can make modifications simply on the basis of his specialist knowledge.

The invention is explained in more detail below with reference to the drawing, which shows or shows: 1 shows a simplified illustration of a firearm according to the prior art, FIG. 2 shows an exploded illustration of a barrel unit according to the invention, FIG. 3 shows a partially cut-out 3-D illustration of a locking sleeve according to the invention, FIGS. 4a and b are views of a barrel as a 3-D representation and in plan view, Figs. 5a and b cross sections of a barrel corresponding to FIG. 4b, FIGS. 6a and b a longitudinal section of the barrel with locking sleeve along the weapon center plane and a corresponding cross section, Figs. 7a to c a locking sleeve with control cam holder as a top view and in sectional views, FIG. 8 a perspective detailed view of a control cam holder built into a locking sleeve, FIG. 9 a detailed view of a cam corresponding to the longitudinal section from FIG. 6a, FIGS. 10a and b a Cross-section and a detailed view of the longitudinal section from FIG. 6 a and FIG. 11 an exploded view of a further embodiment of the invention.

The terms left, right, up, down, front and rear always refer to the firearm from the point of view of the firearm when it is held ready to fire. The weapon has, going through the barrel axis and oriented vertically, a weapon center plane, which cum grano salis, forms a plane of symmetry.

In the description and the claims, as already stated above, the terms “front”, “rear”, “top”, “bottom” and so on are used in their usual form and with reference to the object in its usual position of use. This means that the muzzle of the barrel is “in front” of the weapon, that the bolt or slide is moved “backwards” by the explosion gases, etc .. Transverse to a direction essentially means a direction rotated by 90 °. In the figures described below, the upward running direction is indicated by arrow 91, the normal upward direction by arrow 93 and the transverse direction to the left by arrow 92

A firearm is shown schematically in FIG. 1 a and has a barrel 1 with a barrel core axis 11 and muzzle 14, a housing 2 with an upper housing part 21 and a lower housing part 22, a fore-end 81, a trigger 82, a magazine 83, a grip 84 and a stock 85 on.

2 shows a preferred embodiment of the barrel unit according to the invention as an exploded view, with a mouth 14 being formed on the barrel 1 at the front end and running lugs 15 on the rear barrel end. On a locking sleeve 3, locking lugs 31 are formed at the first, rear, end, which can interact with a lock. A control cam holder 321 with control cam 36 can be connected to the locking sleeve. Furthermore, the running unit can be firmly connected to the housing 2 by means of a clamping device 4 with a clamping lever 40 and a cam 41.

3 shows a partially cut-out 3D view of a locking sleeve 3 according to the invention which, as an elongated body, has an essentially cylindrical opening which is formed along the longitudinal axis and can accommodate the barrel 1 and the bolt head of a firearm. The cylindrical opening extends from a first end of the locking sleeve to a second end and comprises a barrel receptacle 33 which extends from the second end in the direction of the first end and adjoins a locking space 32.

At the first end of the locking sleeve 3, in the cylindrical opening corresponding inwardly extending locking lugs 31 and a locking space 32 behind them, extending in the direction of the second end, are formed in the cylindrical opening, which are provided with a lock (not shown), for example a rotating head lock and its locking head , Can work together. Furthermore, barrel locking lugs 35 extending inwardly are formed on the barrel receptacle 33, which are arranged closer to the second (front) end of the locking sleeve than the locking mechanism black 31 Barrel 1 cooperate and in this way couple the barrel 1 and the locking sleeve 3 firmly to one another in the axial direction.

Furthermore, a control cam 36 extending inward into the barrel receptacle 33 is formed on the locking sleeve 3 and can be arranged closer to the second end than the barrel locking lugs 35. The control cam 36 is preferably designed as a separate part or on its own part and is spring-loaded. In a preferred and illustrated embodiment, the control cam 36 is arranged on a control cam holder 321 or is formed integrally thereon. The control cam 36 with control cam holder 321 is arranged, for example, in a holder recess 322 of the locking sleeve 3. The control cam 36 can preferably be spring-preloaded, for example in that the control cam holder 321 is designed as a leaf spring. Other alternative designs are also possible, so the control cam can be designed as a spring-loaded pressure piece or as a bolt with a compression spring, or as an elastic element. It is also conceivable to arrange the control cam holder 321 in a spring-preloaded manner in the locking sleeve 3.

A clamping device 4 with a clamping lever 40 and a cam 41 lying thereon - in the closed state - can also be seen in FIG. The barrel unit, comprising barrel 1 and locking sleeve 3, can preferably be firmly connected to the housing 2, usually the upper part 21 of the housing, by means of a clamping device 4. In the clamped state (if the firearm is assembled, this also corresponds to the ready-to-fire state), the clamping lever 40 is oriented forward, the cam 41 extends through a recess 371 in the locking sleeve and partially protrudes into the barrel receptacle 33.

However, it is also conceivable to connect the barrel unit according to the invention to the housing 2, for example by means of a traveling nut or thread. Figs. 4a and b show a barrel 1 according to the invention of a firearm comprising the muzzle 14, a barrel bore 13 running along the barrel axis and barrel lugs 15 formed on the barrel end, which can interact with the barrel locking lugs 35 of the locking sleeve. Furthermore, a control path 16 starting at the end of the barrel is shown which has a first section which runs essentially parallel to the barrel core axis and along the barrel surface in the direction of the mouth 14 and which protrudes through the barrel lugs. The control path 16 furthermore has at its end, which is remote from the running end, a second section which is oriented in the circumferential direction and thus normal to the axis of the barrel core. The first section and the second section can be connected to one another, preferably directly, or also via a third section (connecting section) - not shown. A clamping surface 161 is formed on the second section and ends at the end of the control path 16.

FIG. 4a also shows a flattening 151 formed on the barrel 1, a more detailed description of this and the interaction with a tensioning lever 40 is described in FIG. 5a.

In Fig. 4b two cutting planes, Va and Vb are entered, the corresponding cross sections are shown in Figs. 5a and b shown.

5a shows the barrel 1 with barrel bore 12 and the control path 16 with its first section as well as the clamping surface 161 located on the second section of the control path 16, which is in a predefined end position with the control cam 36 of complementary shape, or in a predefined end position of the clamping surface 161 facing surface of the control cam 36, cooperates and connects barrel 1 with locking sleeve 3 firmly and releasably. In the illustration shown, the clamping surface 161 is designed as a ramp, preferably a flat ramp, which lies parallel to the barrel axis 11. The inclination of the clamping surface can be described by the ratio of the first normal distance 165 to the second normal distance 166 on the core axis 11 and the angle a 167 between the first and second normal distance from one another, the first normal distance 165 corresponding to the shortest distance from the clamping surface 161 to the core axis 11 and the second normal distance 166 the longest Distance. The clamping surface 161 is designed to rise linearly outward in the direction of the end of the control path 16, so it has a uniformly linear slope.

The clamping surface 161 can, however, be designed in the shape of a curve when viewed in the running direction 91, or two-dimensionally curved clamping surfaces are also possible. For example, the slope or shape of the clamping surface, viewed in the running direction, can be progressive or concave, degressive or convex, or S-shaped, etc.

Furthermore, the clamping surface 161 can have a detent for locking the control cam 36. This catch can e.g. be arranged in the middle of the clamping surface. The control cam 36 can optionally have a corresponding detent extension, the control cam 36 or the detent extension being designed to complement the shape of the detent. The clamping surface 161 can also have an end stop at its end (at the end of the control path 16) which limits the movement of the control cam 36 in the second section of the control path 16, as can be seen very clearly from FIGS. It is also possible that the clamping surface 161 is designed in its entirety as a detent for the control cam, which is designed in a complementary manner.

The first section of the control path 16 is preferably designed as a surface parallel to the barrel axis. The second section of the control path 16 preferably directly adjoins the first section. The second section is preferably designed in such a way that its projection in the direction of the normal to the barrel axis 11 is at right angles to the barrel axis 11.

5b shows the cross section through the lugs 15. It can be clearly seen that the lugs 15 (as well as the correspondingly designed barrel locking lugs 35 of the locking sleeve 3) are arranged uniformly on the circumference of the barrel. In the illustration selected, an exemplary embodiment is shown with running lugs 15 which are essentially symmetrically arranged when viewed in the running direction. Only two and mutually adjacent running lugs 15 have a first width 153 which is smaller than the second width 154 of all other running lugs 15. The first distance 151 between these two adjacent running lugs is also greater than the second Distance 152 between all other running lugs 15. According to the invention, the width of the control cam 36 essentially corresponds to the first distance 151.

Most easily imaginable, the arrangement can be described in such a way that with a uniform, i.e. symmetrical, distribution of equally wide running lugs 15 with a second width 154 (and always with the same second distance 152) on two adjacent running lugs 15, material is removed from the inside. This reduces the width of these two adjacent lugs 15 to the first width 153. The distance between them increases to the first distance 151. At the lug at 12 o'clock position, this (fictitious) material removal is indicated by a dotted line.

As shown, in a preferred embodiment, eight running lugs 15 are formed in two consecutive rows at the end of the barrel (and correspondingly two rows of eight barrel locking lugs 35 each in the locking sleeve 3), the running lugs 15 and barrel locking lugs are preferably of the same width. However, the invention can also be carried out with a different, smaller or larger number of barrel lugs 15 and corresponding barrel locking lugs 35. In particular, the widths of the running lugs can be the same and, in accordance with the embodiment described above, the first and second spacings 151, 152 can be achieved by a corresponding arrangement of the running lugs 15 in the circumferential direction.

To couple the barrel 1 with the locking sleeve 3, the barrel 1 is pushed with the barrel end first into the barrel receptacle 33 of the locking sleeve 3 and by turning the control cam 36 is brought into overlap with the first distance 151. The barrel 1 can now be moved further into the locking sleeve, guided by the control cam 36 in the control path 16. When the control cam 36 is at the end of the first section of the control path 16, the control cam can be braced against the clamping surface by rotating the barrel 1 and the predefined end position is thus reached. In the predefined end position, viewed in the axial direction, barrel lugs 15 and barrel locking lugs 35 overlap by the forces that occur when a shot is fired from the barrel to the locking sleeve and subsequently to the Forward casing of the firearm. In the predefined end position, the barrel 1 is firmly and detachably connected to the locking sleeve 3, that is to say coupled to one another.

Fig. 6a shows a longitudinal section of the barrel unit according to the invention with Klemmein direction 4 along the weapon center plane, the barrel 1 in the barrel receptacle 33 of the locking sleeve 3 in a predefined end position. The barrel lugs 15 and barrel locking lugs 35 are covered in the axial direction; a cartridge can be pushed into the cartridge chamber 13 via the locking space 32. The control cam 36 formed on a control cam holder 321 is braced against the clamping surface 161, the control cam holder 321 preferably being designed as a leaf spring and being arranged in a holder recess 322.

A clamping device 4 with tensioning lever 40 and handle 43, the barrel unit can be firmly connected to a housing 2 (not shown) and is in the ready-to-fire state. The cam 41 engages through the recess 371, the associated detail section labeled IX is shown in FIG. 9. The corresponding cross section corresponding to the cutting plane X-X is shown in FIG. 10. The cross section corresponding to the cutting plane VI-VI is shown in FIG. 6b

In addition to FIG. 6a, FIG. 6b shows the running unit in a predefined end position with clamping device 4 in cross section along the section plane VI-VI from FIG. 6a. The clamping device 4 comprises clamping lever 40 and a tensioning element 48. The control cam is spring-biased upwards by the control cam holder 321, which is designed as a leaf spring, and presses on the clamping surface 161. In the illustration shown, the coupling can be released by turning the barrel 1 counterclockwise. Clamping surface 161 and control cam 36 (or the surface of control cam 36 facing clamping surface 161) are designed to be complementary in shape to one another, preferably parallel. It can be clearly seen that if it is turned beyond the predefined end position (clockwise), which is due to the radial spring preload, the barrel automatically turns back into the predefined end position, i.e. it positions itself (with repeatable accuracy). 7a shows the locking sleeve 3 with control cam holder 321 in the working position in a view from below. The control cam holder 321 has four holder extensions 324, which are designed essentially complementary in shape to holder guides 323 of the holder recess 322. The control cam holder 321 can accordingly be placed in the holder recess and pushed backwards against the direction of travel 91 into its working position.

Looking together at Figs. 7b, 7c and 8 show that holding grooves 328 are formed in the locking sleeve, with the holder extensions 324 being guided in the holding grooves 328 with a very narrow tolerance when the control cam holder 321 is in the working position, thus the control pin holder 321 is connected to the locking sleeve in a self-clamping manner. For axial locking and loss prevention in the working position, the control cam holder 321 can have a holder stop 327 which engages in an indentation 326. Temporary intermediate locking in the assembly position at a second indentation 326 can also take place according to the same principle.

For a better understanding of the mounting of the control cam holder 321, reference is made to the oblique view in FIG. 8, in which the holding groove 328, the holder guides 323 and the holder extensions 324 can be seen very clearly.

Furthermore, it is possible to form an indentation 115 on the barrel 1 which interacts with an element of complementary shape and additionally securing against rotation. For example, it is possible to implement such an additional anti-rotation device (for barrel 1 and locking sleeve 3) by means of a bolt which is arranged in the locking sleeve 3 or in the housing 2 and transversely on the barrel axis and engages in the indentation.

Another preferred embodiment is described below in FIGS. 9 and 10. FIG. 9 shows a detailed view IX from FIG. 6a, FIG. 10a also shows the cross section along the sectional plane XX in FIG. 6a, and FIG. 10b shows the corresponding detail section Xb. Looking together at Figs. 9 and 10 the interaction of a preferred, additionally anti-twisting element, namely a cam 41 with an indentation of the barrel 1, preferably designed as a flattened area 115, can be seen. In the embodiment shown, the barrel unit with barrel 1 and locking sleeve 3 is firmly connected in a predefined end position and with a clamping device 4 with a housing 2 (not shown). The clamping device 4 comprises a clamping lever 40 which, in the clamped and thus ready-to-fire state, is oriented essentially parallel to the barrel axis 11. A cam 41 formed on the tensioning lever extends upwards, starting at the tensioning lever, viewed in the closed position in the normal direction 93, and engages through the recess 371 of the locking sleeve 3 and protrudes into the barrel receptacle 33.

The barrel 1 has a flattened portion 115 on a side facing the cam 41 in the ready-to-fire state. Depending on the shape of the cam 41, other recesses of complementary shape can also be formed. The barrel 1 should be at a distance from the tip of the cam 41 in the area of the flat 115 in the ready-to-fire position by a gap 416, see also lig. 10b. With this arrangement, the barrel 1 is additionally secured against twisting in the locking sleeve 3, but is not braced undesirably. When the clamping lever 40 is open (that is, it is oriented downwards), the cam 41 is out of engagement with the flat 115 of the barrel 1 and accordingly the barrel can be rotated from the predefined end position and released from the locking sleeve.

Due to the complementary shape of the flattened area 115 of the barrel 1, the clamping lever 40 can only be closed when the barrel 1 is aligned in a predetermined position in the locking sleeve 3. In this way, a kind of “end position control” of barrel 1 can be achieved in a simple manner. It has proven to be advantageous if the gap 416 - if provided - is only a few hundredths of a millimeter, preferably 0.02 to 0.40 mm, particularly preferably from 0.10 to 0.20, as is also shown in detail Xb of FIG Lig. 10a can be seen well in lig. 10b.

11 shows another preferred embodiment of the running unit according to the invention as an exploded view. The control cam holder 321 is designed as a resilient leaflet designed and arranged transversely to the barrel axis 11, normal to the weapon center plane, and, viewed in the direction 91, lying above the barrel. The control cam 36 is formed centrally on the control cam holder 321. The control cam holder 321 can be connected to the locking sleeve 3 by means of screws, for example. This illustration serves to clarify that the position and design of the control cam 36 or the control cam holder 321 on the locking sleeve 3 can be optimized by a person skilled in the art in a relatively simple manner in accordance with the aforementioned teaching.

The invention is not limited to the illustrated and described exemplary embodiments, but can be modified and configured in various ways. In particular, the shown shapes and sectional shapes of the mentioned weapon parts, in particular barrel, control path, barrel lugs, locking sleeve, barrel locking lugs, control cam, control cam holder, clamping lever, distances, widths, recesses, etc. can be adapted to the given basic data, including the lengths and the positions with respect to one another and with respect to the housing can be easily adapted for those skilled in the art with knowledge of the invention. In particular, equivalent embodiments are obvious with knowledge of the invention and can be carried out without further ado by a person skilled in the art. In particular, the above-mentioned embodiments are mutatis mutandis to be applied to embodiments with the opposite direction of action of the clamping surface and control cam, or pretensioning of both elements.

It should also be pointed out that in the description and claims, information such as “lower area” of an object, the lower half and in particular the lower quarter of the total height, “lowest area” means the lowest quarter and in particular an even smaller part; while “middle area” means the middle third of the total height. This applies mutatis mutandis to the terms “width” and “length”. All of this information has its common meaning, applied to the intended position of the object in question.

In the description and claims, “essentially” means a deviation of up to 10% of the specified value, if it is physically possible, both downwards and upwards, otherwise only in the meaningful direction Degrees (angle and temperature) and terms such as “parallel” or “normal” are meant to be ± 10 °. If there are terms such as “essentially constant” etc., what is meant is the technical possibility of deviation on which the person skilled in the art is based and not the mathematical one. For example, an “essentially L-shaped cross section” comprises two elongated surfaces, which merge at one end into the end of the other surface, and whose longitudinal extension is arranged at an angle of 45 ° to 120 ° to one another.

All quantities and proportions, in particular those to delimit the invention, unless they relate to the specific examples, are to be understood with a tolerance of ± 10%, thus for example: 11% means: from 9.9% to 12.1%. In terms such as: “a solvent”, the word “a” is not to be seen as a numerical word, but as an indefinite article or as a pronoun, if nothing else emerges from the context.

Unless otherwise stated, the term: “combination” or “combinations” stands for all types of combinations, starting from two of the constituents in question up to a large number or all of such constituents, the term: “containing” also stands for “consisting out".

The features and variants specified in the individual configurations and examples can be freely combined with those of the other examples and configurations and used in particular to characterize the invention in the claims without necessarily including the other details of the respective configuration or the respective example List of reference symbols with common English translations:

Claims

Patent claims:

1. Barrel unit for a firearm, comprising a barrel (1) with a barrel core axis (11), a muzzle (14) and a barrel end opposite the muzzle (14), on which at least two barrel lugs (15) are formed, with a locking sleeve ( 3) with a barrel receptacle (33) and a first end and a second end, with inwardly extending locking lugs (31) being designed to interact with a lock at the first end and inwardly extending barrel locking lugs (35) closer to the second End than the locking lugs (31), characterized in that the barrel (1) has a control path (16) on the outer surface for cooperation with a control cam (36) arranged on the locking sleeve (3), the control path ( 16) comprises a first section and a second section, the first section beginning at the end and extending parallel to the

The barrel axis (11) extends and the second section is designed to run at least partially in the circumferential direction around the barrel axis (11), and that the second section has a clamping surface (161) that is complementary in shape to the control cam and that the control cam (36) and / or the clamping surface ( 161) are designed to be biased against one another in the radial direction in order to fix the barrel (1) in a predefined end position.

2. Running unit according to claim 1, characterized in that the clamping surface (161) viewed in the running direction (91) is designed as a ramp.

3. Running unit according to claim 2, characterized in that the ramp of the clamping surface (161) in the direction of the end of the control path (16) is designed to rise linearly outward in the radial direction.

4. Running unit according to claim 1 or 2, characterized in that the clamping surface (161) is designed as a curve when viewed in the running direction.

5. Running unit according to one of claims 1 or 2, characterized in that the clamping surface (161) is designed as a curved surface, preferably concave relative to the running surface.

6. Running unit according to one of the preceding claims, characterized in that the clamping surface (161) has a detent for interacting with the control cam (36) or a detent extension of the control cam (36).

7. Running unit according to one of the preceding claims, characterized in that an end stop is formed on the clamping surface (161) which the

Movement of the control cam (36) is limited in the circumferential direction in the second section of the control path (16).

8. Running unit according to one of the preceding claims, characterized in that the first section and the second section of the control path (16) cut by means of a connection sab or, preferably, are connected directly to one another.

9. Running unit according to one of the preceding claims, characterized in that the second section of the control path (16) is aligned at right angles to a straight line parallel to the barrel axis (11).

10. Running unit according to one of the preceding claims, characterized in that a first distance (151) between two adjacent running lugs (15) is greater than a second spacing (152) between two adjacent running lugs (15).

11. Running unit according to one of the preceding claims, characterized in that the control cam (36) is arranged on a control cam holder (321) in the locking sleeve (3).

12. Running unit according to claim 1.1, characterized in that the control cam (36) is integrally formed on the control cam holder (321).

13. Running unit according to claim 11 or 12, characterized in that the control cam holder (321) is designed as a spring, preferably as a leaf spring.

14. Running unit according to one of claims 11 to 13, characterized in that the control cam holder (321) is self-clamping and releasably connected to the locking sleeve (3) in the working position.

15. Running unit according to one of claims 11 to 14, characterized in that a holder stop (327) for engaging in an indentation (326) of the locking sleeve (3) is formed on the control cam holder (321), around the control cam holder (321) in the locking sleeve (3) secure in the working position.

16. Running unit according to one of the preceding claims, characterized in that the barrel (1) has an indentation for interacting with an element which is designed to be complementary in shape and to prevent rotation.

17. Running unit according to claim 16, characterized in that the indentation is designed as a flattening (115) which is complementary in shape to a cam (41) of a clamping lever 40.

18. Barrel unit according to claim 17, characterized in that in the ready-to-fire position the cam (41) and the flat (115) are spatially separated from one another by a gap (416), the gap (416) preferably having a width of 0.02 mm to 0.4 mm, particularly preferably 0.10 mm to 0.20 mm.