LOCKING HEAD OF A RIFLE LOCK AND RIFLE LOCK WITH SUCH A LOCKING HEAD

Description

[0001] The invention relates to a bolt head of a rifle bolt according to the preamble of claim 1. The invention further relates to a rifle bolt with such a bolt head.

[0002] Rifle bolts typically contain a bolt body that is movable relative to a cartridge chamber and lockable in a closed position by means of a locking device. At its front end, the bolt body includes a bolt head for sealing the cartridge chamber to the rear. From Austrian patent application AT 397 862 B, a bolt head of a rifle bolt is known, comprising a base body, a breech face located on the front of the base body, and a ring surrounding the breech face. The ring is formed by two ring parts detachably attached to the base body. At its rear, the base body of the bolt head has an expanding cone for guiding radially inwardly directed conical sections at the front ends of radially movable locking elements.

[0003] The object of the invention is to create a locking head of a rifle bolt and a rifle bolt with such a locking head that enables secure guidance of the locking elements and simple and cost-effective adaptation to different cartridge ejection directions and caliber changes.

[0004] This problem is solved by a bolt head with the features of claim 1 and by a rifle bolt with the features of claim 10. Advantageous further developments and beneficial embodiments of the invention are the subject of the dependent claims.

[0005] The bolt head according to the invention comprises a base body that can be used uniformly for different calibers and various ejection directions, to which several rim sections forming an annular border around the breech face are detachably attached. The rim sections, which serve to laterally define the breech face, can thus be easily positioned at different locations on the base body to adjust the cartridge ejection direction, or replaced with additional rim sections adapted to the desired caliber when changing calibers. Complete bolt heads do not need to be provided for a caliber change or a change in cartridge ejection direction. Instead, depending on the caliber and cartridge ejection direction, appropriately adapted bolt heads can be easily assembled and mounted using a standardized base body.This reduces the costs associated with caliber changes or adjustments to the cartridge ejection direction. The rear of the bolt head features an inwardly curved guide surface for pivoting locking elements. This ensures secure guidance of the locking elements on the bolt head.

[0006] In a particularly advantageous embodiment, the rim can be formed by two semi-ring-shaped rim sections detachably attached to the base body to laterally define the impact surface. However, the rim can also be formed by more than two replaceable rim sections.

[0007] For the removable attachment of the rim parts to the base body, the base body can expediently include a retaining groove around its outer circumference on its front side for the positive engagement of the rim parts.

[0008] In a particularly advantageous embodiment for assembly and secure mounting, the edging parts can have an inner contact surface on their rear side for resting against the impact base and a hook-shaped projection for engaging in the retaining groove. The edging parts can be held together by a ring spring. For secure mounting of the ring spring, the edging parts preferably have an annular groove on their outer side for receiving the ring spring. For rotationally secure mounting, the ring spring expediently has an inwardly projecting end piece at one end or at both ends for engaging in a radial blind hole on the outer side of an edging part.

[0009] To specify a defined position of the border parts on the base body that is secured against rotation, suitable positioning elements can be arranged on the inside of the border parts for positive engagement with corresponding counter-elements on the outside of the base body.

[0010] A claw-shaped cartridge extractor may also be molded onto one of the rim parts.

[0011] The invention also relates to a rifle bolt with a bolt carrier on which a bolt head as described above and a locking device for holding the bolt head in a locked position are arranged.

[0012] The locking device expediently comprises two diametrically opposed locking elements that can be pivoted between a locked position and a released position by a control element. The locking elements are preferably pivotably mounted about a common transverse axis.

[0013] Further features and advantages of the invention will become apparent from the following description of a preferred embodiment with reference to the drawing. The drawing shows: Figure 1 a part of a rifle with a barrel, a locking sleeve and a rifle bolt in a side view; Figure 2 the in Figure 1 shown part of a rifle with rifle bolt in a top view; Figure 3 the front part of the in the Figures 1 and 2 rifle bolt shown with the locking sleeve hidden in a side view; Figure 4 a locking head of the in the Figures 1 and 2rifle bolt shown in a perspective view; Figure 5 a sectional view along line AA of Figure 1 ; Figure 6 a sectional view along line BB from Figure 2 ; Figure 7 the in Figure 4 shown locking head in a front view; Figure 8 the in Figure 4 shown locking head in a side view; Figure 9 a sectional view along line BB from Figure 7 ; Figure 10 a sectional view along line AA of Figure 7 and Figure 11 a sectional view along line CC of Figure 8 .

[0014] In the Figures 1 and 2The bolt assembly is a part of a straight-pull repeating rifle, comprising a barrel 1, a locking sleeve 2, and a bolt 4, which is designed here as a bolt and is movable between a rear open position and a front closed position relative to the barrel 1 by means of a bolt handle 3. The bolt 4 is shown in a side view and a top view. It is slidably guided on a receiver or bolt housing 5 and includes a bolt carrier 6 with two parallel outer guide rails 7 and two parallel inner plate-shaped retaining elements 8, on which a bolt is mounted. Figure 3 The bolt head 9 shown is arranged to close a cartridge chamber to the rear, and a locking device 10 is arranged to hold the bolt head 9 in a locked position. A [missing information] is attached to the system housing or bolt body 5. Figure 1 A recognizable trigger mechanism 11 is arranged with a trigger blade 12.

[0015] How particularly from Figure 3 As can be seen, the locking head 9 is held by the front ends of the plate-shaped retaining elements 8, which are preferably made of sheet metal. For this purpose, the plate-shaped retaining elements 8 each have a head-shaped extension 13 at their front ends for positive engagement in correspondingly designed, diametrically opposed recesses 14 on the locking head 9.

[0016] In the illustrated embodiment, the locking device 10 consists of two diametrically opposed, half-shell-shaped upper and lower locking elements 15, which can be pivoted between the two plate-shaped retaining elements 8 about a common transverse axis 16 between an inwardly pivoted release position and an outwardly pivoted locking position.

[0017] The in Figure 4The locking head 9, shown in a perspective view, comprises a substantially cylindrical base body 17, which has at its front a thrust plate 18 perpendicular to a longitudinal axis of the base body 17 and at its rear a Figures 3 and 5 The cylindrical base body 17 contains a recognizable, inwardly curved guide surface 19 for guiding the pivotable locking elements 15. On the outside of the cylindrical base body 17 are the two opposing recesses 14 for the positive engagement of the front ends 13 of the two plate-shaped retaining elements 8. The locking head 9 also includes a ring-shaped rim 20 surrounding the strike plate 18, which in the illustrated embodiment is formed by two semi-ring-shaped rim parts 21 and 22 detachably arranged on the front of the base body 17.

[0018] As from the Figures 3 and 5As can be seen, the two diametrically opposed upper and lower hemispherical locking elements 15 are pivotably mounted about the common transverse axis 16 in aligned transverse bores 23 of the two plate-shaped retaining elements 8. For this purpose, the two locking elements 15 have two diametrically opposed flats 24 on their outer surface with outwardly projecting semi-ring-shaped bearing pins 25. The upper locking element 15 rests with its two diametrically opposed bearing pins 25 against the upper inner wall of the two aligned transverse bores 23, while the lower locking element 15 rests with its two diametrically opposed bearing pins 25 against the lower inner wall of the two aligned transverse bores 23. The locking elements 15 are pivotally held on the two plate-shaped retaining elements 8 by means of the pins 26 inserted between the bearing pins 25.

[0019] In the Figures 5 and 6 It can be seen that the semi-shell-shaped locking elements 15 have a front part 27 projecting forward relative to the bearing pins 25 and a rear part 28 projecting backward relative to the bearing pins 25. On the front of their front part 27, which projects forward relative to the bearing pins 25, an outwardly curved contact surface 29 is provided for bearing against the rear guide surface 19 on the rear of the locking head 9. The front contact surfaces 29 of the locking elements 15 are aligned with the rear guide surface 19 of the locking head 9 such that the locking elements 15 are guided on the rear guide surface 19 of the locking head 9 during their movement between the unlocked and locked positions.

[0020] On the outside of the front part 27 of the locking elements 15 are semi- or partially ring-shaped locking projections 30 for engagement in a Figure 5 A recognizable inner annular groove 31 is provided at the rear end of the locking sleeve 2. In the locked position of the locking elements 15, the locking projections 30 engage positively in the annular groove 31, while in the unlocked position of the locking elements 15, the locking projections 30 are pivoted inwards so that the rifle bolt 4 can be pulled rearwards to open. On the inside of the front part 27 of the locking elements 15, according to Figure 6 An inner, slightly conical support surface 32 and an inclined front control surface 33 are provided for moving the locking elements 15 into the locked position. On the inside of the rear part 28 of the locking elements 15, which projects rearward relative to the bearing pins 25, an inclined rear control surface 34 is arranged for moving the locking elements 15 into the unlocked position.

[0021] A sleeve-shaped control element 35, coupled to the chamber stem 3 for axial displacement, is arranged between the two semi-shell-shaped locking elements 15 to control the movement of the locking elements 15 between the locked and unlocked positions. The sleeve-shaped control element 35 has a radially extended front support area 36 at its front end for moving the locking elements 15 into the locked position and a rearwardly offset, ramp-shaped rear support area 37 for moving the locking elements 15 into the unlocked position. Thus, by axially displacing the sleeve-shaped control element 35 relative to the two locking elements 15, the locking elements 15 can be moved not only into the locked position but also, without additional springs or other separate return elements, forcibly moved back into the unlocked position.This can reduce the number of parts required and improve reliability.

[0022] For axial displacement of the sleeve-shaped control element 35, this is connected to the chamber stem 3 via two also in Figure 2 The parallel, plate-shaped sliding parts 38 shown are coupled such that the control element 35 can be moved between a front locking position and a rear unlocking position by rotating the chamber stem 3. For this purpose, the two plate-shaped sliding parts 38 are connected at their front ends via Figure 5The pins 39 shown are connected to a cylindrical rear end 40 of the control element 35. When the control element 35 is pushed forward from a rear unlocked position, the locking lugs 30 on the front part 27 of the two locking elements 15 are pressed radially outward via the front support area 36 and the inclined front control surfaces 33 and held in the locked position by the conical support surface 32. When the control element 35 is retracted into the rear unlocked position, the locking elements 15 are pivoted by the rear support area 37 bearing against the inclined rear control surfaces 34 of the locking elements 15, such that the locking lugs 30 on the front part 27 of the two locking elements 15 are pressed radially inward into a release position.This results in a particularly stable and reliable rifle bolt with secure locking and unlocking, achieved with relatively few and inexpensive parts. A firing pin 41 is axially displaceable within the sleeve-shaped control element 35.

[0023] In the Figures 7 to 11 is the in Figure 4The bolt head 9, shown in a perspective view, with the essentially cylindrical base body 17, is shown in various views. As explained above, the base body 17 has a breech face 18 at its front, perpendicular to a longitudinal axis of the base body 17, and an inwardly curved guide surface 19 at its rear for guiding the pivotable locking elements 15. A central through-hole 42 for guiding a front end of the firing pin 41 is arranged in the base body 17. Radially offset from the through-hole 42, two blind bores 43, open towards the front, are also arranged in the base body 17 for receiving spring-loaded, pin-shaped cartridge ejectors.The locking head 9 also includes a ring-shaped rim 20 surrounding the breech face 18, which in the illustrated embodiment is formed by two rim parts 21 and 22 detachably arranged on the front of the base body 17. For this purpose, the base body 17 has a circumferential rim on its front side, extending into the... Figure 9 and 10 recognizable retaining groove 44 for the positive engagement of the two surrounding parts 21 and 22.

[0024] In the embodiment shown, two semi-circular rim sections 21 and 22 are inserted into the retaining groove 44 circumferentially on the outside of the base body 17. Each of the two semi-circular rim sections 21 and 22 has a semi-shell-shaped inner surface 45 to define an inner diameter adapted to the caliber. Furthermore, the two semi-circular rim sections 21 and 22 have an inner contact surface 46 on their rear side for bearing against the breech face 18 and a hook-shaped projection 47 for positive engagement in the retaining groove 44. A ring spring 48 holds the two rim sections 21 and 22 together and secures them in the retaining groove 44. For this purpose, the rim parts 21 and 22 have an annular groove 49 on their outer side for receiving the ring spring 48 that encloses the two rim parts 21 and 22. For rotationally secure retention, the ring spring 48 has at one or both ends according to Figure 10An inwardly projecting end piece 50, projecting at a right angle, engages in a radial blind hole 51 on the outside of the rim part 21. On the Figure 7 The left rim part 21 has an inwardly projecting claw-shaped cartridge extractor 52 for extracting a cartridge case from the cartridge chamber.

[0025] On the inner sides of the border parts 21 and 22, below the in Figure 10 shown hook-shaped projections 47 in Figure 11Recognizable positioning elements 53 are arranged on the outside of the base body 17 for positive engagement with corresponding counter-elements 54. In the illustrated embodiment, the positioning elements 53 are designed as inwardly projecting semicircular projections. The counter-elements 54 are designed as semicircular recesses on the outside of the base body 17. A defined position of the surrounding parts 21 and 22, secured against rotation, can be specified by means of the positioning elements 53 and the corresponding counter-elements 54.

[0026] The rim sections 21 and 22, which serve to laterally define the breech face 18, can thus be replaced by further rim sections adapted to the desired caliber when changing calibers. The cartridge ejection direction can also be easily changed by exchanging the position of the two rim sections 21 and 22. Complete bolt heads do not need to be provided for a caliber change or a change in cartridge ejection direction. Instead, depending on the caliber and cartridge ejection direction, appropriately adapted bolt heads can be easily assembled and mounted using a standardized base. This reduces the costs associated with a caliber change or an adjustment of the cartridge ejection direction.

[0027] The invention is not limited to the rifle bolt described in detail above with the locking device used therein. The locking head according to the invention is also applicable to other rifle bolts with different locking mechanisms. For example, the locking head can also be used with cylinder bolts with a radial collar or bolts with other locking mechanisms. Reference symbol list

[0028] 1 Barrel 2 Locking sleeve 3 Chamber rod 4 Rifle bolt 5 System box or bolt housing 6 Bolt carrier 7 Outer guide rail 8 Inner retaining element 9 Bolt head 10 Locking device 11 Trigger mechanism 12 Trigger blade 13 Extension 14 Recess 15 Locking element 16 Transverse axis 17 Base body 18 Brace face 19 Guide surface 20 Rim 21 First rim section 22 Second rim section 23 Transverse bore 24 Flattened area 25 Bearing pin 26 Pin 27 Front part of the locking element 28 Rear part of the locking element 29 Contact surface 30 Locking lug 31 Annular groove 32 Support surface 33 Front control surface 34 Rear control surface 35 Control element 36 Front support area 37 Rear support area 38 Pusher 39 Pin 40 Rear end of control element 41 Firing pin 42 Through hole 43 Blind hole 44 Retaining groove 45 Inner surface 46 Inner contact surface 47 Hook-shaped projection 48 Ring spring 49 Ring groove 50 End piece 51 Blind hole 52 Cartridge extractor 53 Positioning element 54 Counter element

Claims

1. A bolt head (9) of a gun bolt (4) with a base body (17), a breech face (18) arranged on the front side of the base body (17) and a rim (20) annularly encircling the breech face (18), which is formed by multiple rim parts (21, 22) releasably attached to the base body (17), wherein a guide surface (19) for guiding pivotable locking elements (15) is provided on the rear side of the base body (17), characterized in that the guide surface is an inwards curved guide surface.

2. The bolt head (9) according to claim 1, characterized in that the rim (20) is formed by two semi-annular rim parts (21, 22) releasably attached to the base body (17) for laterally delimiting the breech face (18).

3. The bolt head (9) according to claim 1 or 2, characterized in that the base body (17) includes a retaining groove (44) encircling on the outer circumference on its front side for form-fit engagement with the rim parts (21, 22).

4. The bolt head (9) according to claim 3, characterized in that the rim parts (21, 22) have an inner abutment surface (46) for abutment on the breech face (18) and a hook-shaped projection (47) for engagement with the retaining groove (44) on their rear side.

5. The bolt head (9) according to any one of claims 1 to 4, characterized in that the rim parts (21, 22) are held together by an annular spring (48).

6. The bolt head (9) according to claim 4, characterized in that the rim parts (21, 22) include an annular groove (49) for receiving the annular spring (48) on their outer side.

7. The bolt head (9) according to claim 5 or 6, characterized in that the annular spring (48) includes an end piece (50) orthogonally protruding inwards at its one end or at both ends for engagement with a radial blind hole (51) on the outer side of a rim part (21, 22).

8. The bolt head (9) according to any one of claims 1 to 7, characterized in that positioning elements (53) for form-fit engagement with corresponding mating elements (54) on the outer side of the base body (17) are arranged on the inner side of the rim parts (21, 22).

9. The bolt head (9) according to any one of claims 1 to 8, characterized in that a claw-shaped cartridge extractor (52) is formed on one of the rim parts (21, 22).

10. A gun bolt (4) with a bolt carrier (6), at which a bolt head (9) and a locking device (10) for mounting the bolt head (9) in a locking position are arranged, characterized in that the bolt head (9) is formed according to any one of claims 1 to 9.

11. The gun bolt (4) according to claim 10, characterized in that the locking device (10) includes two diametrically opposing locking elements (15) pivotable between a locking position and a release position by a control element (35).

12. The gun bolt (4) according to claim 11, characterized in that the locking elements (15) are mounted pivotable about a common transverse axis (16).

13. The gun bolt (4) according to claim 11 or 12, characterized in that the locking elements (15) have an outwards curved abutment surface (29) for abutment on the bolt head (9) on their front side.