DE8507532U1 - Insert barrel for a rifle - Google Patents

Description

- 1 - Insert barrel for a Geuishr.

The invention relates to an insert barrel for a rifle, with a substantially cylindrical bearing bush provided at the rear end of the insert barrel, which can be inserted into the cartridge chamber of the rifle barrel, at its front end with a conically tapering forward transition, knnischsn for support Geyphrpatronenlager serving part is provided and at its rear end a smaller cartridge chamber with an annular shoulder for the edge of a cartridge case smaller Caliber, as well as an axially ..limitably displaceable cartridge extractor for this, wherein this cartridge extractor has a radially inward protruding into the area the ring shoulder of the smaller cartridge chamber engaging extractor part and a radially outwardly protruding has the edge on which a cartridge extractor of the rifle engages.

In a known plug-in barrel of this type, the cartridge extractor of the plug-in barrel is a slide with schuial- formed b-tail-shaped cross-section, which is in a on the circumference of the bearing bush machined groove with a dovetail-shaped cross-section is slidably mounted. A screw screwed into the slide that engages in an elongated hole recess provided on the bottom of the groove, limits the sliding of the cartridge extractor in axial direction. The groove with a dovetail Cross-section and also the slide of the cartridge extractor are relatively expensive to manufacture. The slide can also easily get stuck in the groove. aside from that the bearing sleeve is locally weakened by the groove in the area of the cartridge chamber. So that the slide from the radial after except, protruding edge, which is in the circumferential direction of the

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Bearing bush is only relatively narrow, a sufficient one Has strength, it must be thicker in the axial direction as the. Case edge of a cartridge case that can be inserted into the chamber of the rifle. This in turn has the consequence that in the cartridge extractor of the rifle an additional Recess must be incorporated into which the edge can intervene. Because of the storage of the cartridge extractor required groove the mentioned local weakening of the cross-section of the bearing bush occurs, the aim is to

1D to the outer diameter of the bearing bush as large as possible make so that the bushing is just about in the chamber of the rifle fits. As a result, the bearing bush Can only be used for a certain caliber of the rifle and a different bearing bush is required for a smaller caliber. Since the bearing bush is firmly connected to the respective insert barrel, another insert barrel is also required required, whereby storage is relatively expensive.

The invention is based on the object of creating a plug-in barrel of the type mentioned at the outset, which is under The exchange of fewer parts for different calibers allows the cartridge extractor to be easier to manufacture and does not require any additional recesses on the cartridge extractor of the rifle.

This is achieved according to the invention in that the on The cartridge extractor mounted on the bearing bush is a cylindrical one Has sleeve, which on a diameter compared to your rifle cartridge chamber smaller cylindrical The end of the bearing bush is axially displaceable and secured against rotation is stored and carries the pull-out part and the protruding edge at its rear end.

The sleeve, which is slidably mounted on the circumference of the bearing bush of the cartridge extractor does not require any on the bearing bush Longitudinal groove. As a result, the bearing bushing rises on its circumference not locally weakened at any point and as a result may have a smaller diameter overall. As a result, the bearing sleeve fits in cartridge chambers of different calibers. Because the production of a longitudinal groove omitted and the extractor part itself is also relatively easy to divide, are overall the manufacturing costs are reduced. Furthermore, the edge of the cartridge extractor can extend over a larger part of the Extend the circumference of the sleeve, for example approximately over half the circumference. This has the advantage that the edge can be kept just as narrow in the axial direction as the sleeve edge of one that can be inserted into the rifle cartridge chamber Cartridge case. As a result, there is no special recess for the cartridge extractor on the original extractor of the rifle of the insert barrel required. The adaptation to different calibers of the chamber of the rifle can be done in a simple manner that one the sleeve is easily exchangeable on the bearing bush. Should the insert barrel, for example, be used for a larger caliber of the rifle is used, then a sleeve ;? pushed onto the bearing bush, some in a radial direction has further protruding edge. Conversely, with smaller rifle calibers, a case is used with its rim protrudes less far in the radial direction.

For adapting the insert barrel to different sizes of the cartridge chamber of the rifle, it is also advantageous if the conically tapering towards the front Part is arranged on a nut which can be screwed onto a thread provided at the front end of the bearing bush is. Simply by screwing this nut

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a certain adjustment of the insert barrel to the the respective chamber of the rifle. In the case of larger differences in caliber, the nut simply turns against exchanged a more or less large mother. 5

Verbatim refinements of the invention are characterized in the subclaims.

The invention is explained in more detail in the following, using an exemplary embodiment shown in the drawing-1D. Show it:

Figure 1 is an axial section through the barrel of a rifle

with inserted insert barrel, Figure 2 is a longitudinal section of the chamber of a rifle with a larger caliber,

FIG. 3 shows a longitudinal section of the rear end of the insert barrel on an enlarged scale,

Figure k is an end view of the rear end of the insert barrel and the gun barrel, partially in section according to the line Iu-IV of Figure 3,

Figure 5 shows details of an advantageous mounting of the front end of the insert barrel in enlarged Scale,

FIG. 6 shows a longitudinal section of the front end of the insert barrel and the gun barrel.

In the drawing, 1 denotes the gun barrel, which at its rear end, the cartridge chamber 2 and in

3D area of its mouth 3 has a choke hole (choke hole) U. The diameter of the choke bore k is somewhat narrower than that of the barrel bore 5. The cartridge chamber Z is normally used to hold shotgun shells that have a radially protruding sleeve at their rear end have senrand. Has to accommodate this sleeve edge

the chamber 2 at its rear end has an annular shoulder 2a, in uelche the edge of the case engages so that The ^ cartridge base is level with the push base 7 of the rifle barrel 1 lies. It is also a cartridge extractor 8 which is axially displaceable in the direction of the barrel axis provided, which engages in the cartridge chamber 2 in the area of the annular shoulder 7. The cartridge extractor B shows a ring shoulder bow piece complementing the ring shoulder 7 Ba on, the edge of the shell of the shotgun supports. By moving the cartridge extractor B in In direction B to the rear, the cartridge case is a little bit out of the chamber when the breech is opened 2 pulled out.

If the shot barrel 1 is to be used as a ball barrel, then the plug-in barrel 6 is for this purpose from behind inserted into rifle barrel 1. The plug-in barrel 6 has a substantially cylindrical bearing bush 9 at its rear end and is at its front end provided with an adjusting sleeve 10, which engages with a part 10a in the choking bore k. At its front end, the bearing bush 9 expediently has a thread 11 on which the part 13, which is provided with a female thread and tapering conically towards the front, can be screwed.

The conical part 13 serves to support the bearing bush 9 on the conical transition 2b of the cartridge chamber 7. By screwing the conical part 13 you can adjust the plug-in barrel 6 in the direction of the barrel axis so that the rear end face 9a of the bearing bush 9 in a Level with the shock floor 7 is. The knurled nut 12 is used to counter the conical part 13. The conical part is expediently interchangeable with a larger or smaller, conically tapering part 13, whereby the Insert barrel G in a very simple way to cartridge chamber different caliber can be adapted.

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The bearing bush 9 has at its rear end a in relation to the cartridge chamber 2 smaller cartridge chamber * \ k ,, wel, che "s for receiving a a projectile containing Patro-.ne smaller caliber is used. This smaller cartridge chamber 14 has at its rear end a On the rear end 9b of the bearing bush 9, which has a diameter d which is smaller than the diameter D of the cartridge chamber 2, a cylindrical sleeve 15 is mounted so as to be axially displaceable its rear end has a radially inwardly projecting extractor part 16, which is expediently designed in the form of a segmental bottom Extractor part 16 is provided with an annular shoulder arch piece 16a, which the annular shoulder 14a of the cartridge chamber s 14 added. Furthermore, the case 15 has at its rear end a radially outwardly projecting edge 18, the radius R of which corresponds to the radius of the case edge of a shotgun cartridge to be inserted into the chamber 2. The width of this edge 18 in the axial direction also corresponds to the width of a sleeve edge. The edge 1Θ engages in the ring shoulder arc piece 8a of the extractor 8 in the same way as the case edge of a shotgun cartridge.

Which can also be seen, in particular from FIG can, extends the bottom 16 and the above Edge 18 approximately over half the diameter of the sleeve 15 “In this way, a very large contact surface is created created for the cartridge extractor 8.

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In order to limit the axial displaceability of the sleeve 15, This is also seen with a longitudinal slot 19 v / extending in the axial direction, in Melchen a radial one screw 20 screwed into the bearing bush 9 engages with play. The sleeve 15 is also secured against rotation by this screw 20.

Furthermore, adjacent to the edge 1B in the sleeve 15 is a radial screw 21 screwed in or a pin screwed in

ID sets. This screw 21 is used to engage in eir: en

axial slot 8b of the cartridge extractor Θ. The ones in the Radial screw 21 engaging slot Bb prevents the sleeve 15 from rotating with respect to the gun barrel 1. Since the sleeve 15 for its part opposite the bearing bush 9 is secured against rotation, this is also the

Insert barrel 6 secured against twisting in rifle barrel 1.

When the bolt is opened, the cartridge extractor B moves backwards. As a result, the H-jIsb 15, which engages with its edge 2D 1B in the ring shoulder arc piece Ba, is also shifted backwards and pulls a cartridge located in the smaller chamber 1 * »backwards out of the cartridge chamber ΛΗ .

The sleeve 15 is expediently mounted on the bearing bush 9 such that it can be easily replaced. This easy replacement is ensured by the screw 20. After unscrewing the screw 20, the sleeve 15 can be pulled back from the bearing bushing 9 and against another

Replace sleeve 15 '(Figure 2). The other sleeve 15 '

has an edge 1Θ 'on something in the radial direction further protrudes beyond the sleeve 15 '. In this way, the Einstecklauf G by exchanging the sleeve 15 against the case 15 'in a cartridge chamber 2' of larger caliber can be used. The modular principle can be used on this

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Lilly one and the same insert barrel 6 with the bearing bush 9 attached to it for different calibers of the Gun barrel is used 1.

This modular principle can be supplemented in an expedient manner in that the adjusting sleeve 1G first only lcBe is pushed onto the insert barrel 6 or can be screwed on and exchanged for an adjusting sleeve with a different diameter and / or a different axial length is. In this way, you can adapt the insert barrel to the respective gun barrel in a very simple manner. First after the adjustment has been made, the adjustment sleeve 10 firmly connected to the plug-in barrel G by an adhesive connection.

The adjusting sleeve 10 has near its front At the end several radially directed adjusting screws 22, for example four offset from one another by 9D ° Adjusting screws 22. These adjusting screws are used in addition, the front end 6a of the plug-in barrel 6 opposite to adjust the barrel 1.

The adjusting sleeve 10 should engage in the radial direction with practically no play in the choke bore k , whereby they each but when inserting and removing the insert barrel should be slidable in the choke hole. Since the choke bores of different rifle barrels are in diameter always differentiate something, the adjustment sleeves of known plug-in barrels must each individually to the rifle barrel adapted for which the insert barrel is to be used. This requires a considerable amount of work. Therefore is advisable to avoid this work involved, as is shown greatly enlarged in Figure 5, the outer diameter d2 of the k in the choke bore engaging part 10a of the adjusting sleeve 10 is smaller than the inner diameter D2 of the choke hole. The part 10a

the adjusting sleeve 10 thus engages with a relatively large amount of play in the choke bore k . The part 10a also has several O-ring grooves 23a, 23b, 23c of different depths. A D-ring Zk is inserted into one of these Dbigen grooves 23a, 23b, 23c. If the difference in diameter between the part 10a of the adjusting sleeve 1D and the choke hole k is only small, then the O-ring Zk is inserted into the deepest groove 23c. In the case of larger differences in diameter, the O-ring Zk is either inserted into the groove 23b or the groove 23a. The O-ring Zk is then supported under compression in the choke bore k . In this way, a radial support of the adjusting sleeve 10 free of play is achieved without the need for cutting adjustment work. Nevertheless, the insert barrel can easily be inserted and removed again. The adaptability of the part 10a of the adjusting sleeve 10 to the respective diameter D2 of the choke hole can be improved by providing several O-rings of different cross-sections, one of which is then inserted into the groove 23a, 23b or 23c of the appropriate depth. The part 10a also has at its front end a further ring groove 25 into which an O-ring 26 is inserted. This O-ring 26 only serves to prevent moisture and dirt from penetrating the gun barrel.

It therefore only needs to rest in the choke hole with relatively little compression.

It is also advantageous if the insert barrel 6 is on its front end has a portion 6a which has a diameter d3 which is smaller than that Diameter D3 of the rest of the insert barrel. The adjusting sleeve 10 has a first bore 27 in the area of this section 6a, which the section 6a at a distance surrounds. This first bore 27 closes

to the rear a second bore 28, the diameter of which D3 corresponds to the outer diameter of the insert barrel 6. This embodiment has the waiting part that the plug-in barrel eirten have a relatively large outer diameter can and thus has good training behavior. The section 6a, which is tapered in diameter, can be positioned radially in the correct bore 27 by means of the adjusting screws 22 can be adjusted a little, whereby you can adjust the vertical or lateral flight path of the storey.

Claims (11)

Expectations 1. Insert barrel for a rifle, with one at the rear end ties «plug-in barrel provided, essentially cylindrical Bearing bush that can be inserted into the cartridge chamber of the rifle barrel. at its front end with one that tapers conically according to warn, for support is provided at the conical transition of the rifle cartridge chamber serving and at its rear end a smaller chamber with a ring shoulder for the case edge of a cartridge case with a smaller caliber as well as an axially displaceable cartridge extractor for the latter, this cartridge extractor one protruding radially inward into the area of the annular shoulder of the smaller cartridge chamber engaging extractor part and one radially outward has protruding edge on which engages a cartridge extractor of the rifle, characterized in that the cartridge extractor mounted on the bearing bush (9) has a cylindrical sleeve (15) which is mounted on a in diameter (d) opposite the rifle cartridge chamber (2) smaller cylindrical rear end (9a) of the bearing bush (9) secured against rotation and axially displaceable is mounted and at its rear end carries the extractor part (16) and the protruding edge (1B). 2. insert barrel according to claim 1, characterized in that the sleeve (15) ala extractor part (16) has a segment-shaped Has bottom and that the bearing bush (9) at its rear end (9a) with a corresponding a-segment-shaped recess (17) is provided in which engages the bath, with the bottom a ring shoulder (1Ua) of the smaller cartridge chamber (1U) has complementary ring shoulder arch piece (16a). 3. Insert barrel according to claim 1 or 2, characterized in that the bed (16) and the protruding edge (ΊΒ) extend approximately over half the diameter of the sleeve (15).
5 if. Insert barrel according to claim 1, characterized in that that the sleeve (15) on the bearing bush (9) can be easily replaced is stored. 5. Insert barrel according to claim 1 or k, characterized in that the sleeve (15) has an axially extending longitudinal slot (19) in which a screw (20) screwed radially into the bearing bushing (9) engages with play. 6. insert barrel according to claim 1, characterized in that the forward conically tapering part (13) is provided on a nut on a thread provided at the front end of the bearing bush (9) (11) can be screwed. 7. insert barrel according to claim 1, with an adjusting bushing provided at the front end of the insert barrel, one part of which can be pushed into the choke hole at the muzzle of the rifle barrel and has several radially directed adjusting screws, which are located near the mouth of the plug-in barrel support on this, characterized in that the outer diameter (d2) dee <n engages the choke bore Ct) Parts (10a) of the adjusting bush (10) is smaller than the inner diameter (D2) of the choke hole (U), so that the part (10a) of the adjusting sleeve (10) engages with play in the choke hole (U), and that in the Choke bore (U) engaging part (10a) of the juvenile bush (10) has several different deep O-ring grooves <"23a, 23b, 23c), in which a D-ring (2U) gives way = 13 - can be used, with which the adjusting sleeve (10) in the Choke hole (U) is supported. 8. insert barrel according to claim 7, characterized in that that several O-rings (2Ό different cross-section are provided, which can be optionally inserted into one of the D-ring grooves (23a, 23b, 23c). 9. insert barrel according to claim 7, characterized in that the adjusting sleeve (10) loosely on the insert barrel (6) can be pushed on or screwed on and against a Adjusting sleeve with a different outside diameter (d2) is interchangeable. 10. insert barrel according to claim 7, characterized in that that the insertion barrel (6) at its front end has a section (6a) which has a smaller diameter (d3) has as the rest of the insertion barrel (6) that the adjusting sleeve (10) in the area of this section (6a) has a first bore (27) which surrounds the section (6a) at a distance, and then to the rear to the first bore (27) a second bore (28), the diameter of which corresponds to the outer diameter (D3) of the insert barrel (6) corresponds. 11. insert barrel according to claim 10, characterized in that that the insert barrel (6) is glued to the adjusting sleeve (10) in the region of the second bore (28).