BREECH BLOCK AND GUN

Abstract

A breech block, in particular wedge breech block, having a breech end and a breech wedge, comprising an opener shaft with a rotationally coupled opening lever and an ejector system for pulling out cartridge cases or cartridge bases from the breech block, said ejector system comprising at least one ejector and at least one ejector lever, which actuates the ejector, wherein the ejector lever is rotationally movably mounted on the opener shaft and the ejector system has at least one transmission element which transmits a rotational movement of the opening lever to the ejector lever.

Claims

1. A breech block comprising: a breech end; a breech wedge; an opener shaft with a rotationally coupled opening lever; and an ejector system to pull out cartridge cases or cartridge bases out of the breech block, the ejector system comprising: at least one ejector; at least one ejector lever that actuates the ejector, the ejector lever being rotationally movably mounted on the opener shaft; and at least one transmission element that is designed to transmit a rotational movement of the opening lever to the ejector lever.

2. The breech block according to claim 1, wherein the transmission element is mounted on a first axis which is spaced from the opener shaft.

3. The breech block according to claim 1, wherein the ejector system has at least one first contact roller arranged at an end of the transmission element for contact with the opening lever and has at least one second contact roller arranged at the first end of the transmission element for contact with the at least one ejector lever.

4. The breech block according to claim 3, wherein at least the first contact roller and the second contact roller are arranged on a common second axis.

5. The breech block according to claim 1, wherein the ejector system has at least one preload element that the transmission element preloads against the at least one ejector lever.

6. The breech block according to claim 3, wherein the at least one ejector lever has a lever arm with an arc-shaped contact surface that is permanently in contact with the second contact roller.

7. The breech block according to claim 6, wherein the contact surface is substantially concave, so that when opening the breech block, the rotation angle of the rotational movement of the ejector lever in relation to the angle of rotation of the rotational movement of the opening lever describes a progressive characteristic curve.

8. The breech block according to claim 3, wherein the opening lever is designed in such a way that it is not in contact with the first contact roller in the open position of the breech block and the first contact roller is adapted to be brought into contact with the opening lever in the course of the opening process.

9. A gun comprising at least one breech block according to claim 1.

10. The breech block according to claim 1, wherein the breech block is a wedge breech block.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only, and thus, are not limitive of the present invention, and wherein:

[0036] FIG. 1 is a schematic perspective view of the inventive breech block having an ejector system;

[0037] FIG. 2 is a schematic perspective enlarged view of the breech block having the ejector system from FIG. 1;

[0038] FIG. 3a is a schematic side view of the ejector system of the inventive breech block, wherein the breech wedge is in a closed position;

[0039] FIG. 3b is a schematic side view of the ejector system of the inventive breech block according to FIG. 3a, wherein the breech wedge is in the open position;

[0040] FIG. 4 is a schematic diagram of the angle of the opening lever and the angle of the ejector lever in relation to the forward movement; and

[0041] FIG. 5 is a schematic rear view of the breech block.

DETAILED DESCRIPTION

[0042] FIG. 1 shows a schematic perspective view of the breech block 10 according to the invention having an ejector system 30. The breech block 10 is preferably a gun barrel breech, in particular a wedge breech block having a breech end 12 and a breech wedge 14.

[0043] The breech block is part of a gun 1.

[0044] The breech block 10 also has an opener shaft 20 with a rotationally coupled opening lever 22. The opener shaft 20 is mounted at the bottom of the breech end 12 by means of several opener shaft bearings 24.

[0045] Furthermore, the opener shaft 20 has a cog wheel, via which the opener shaft 20 can be driven.

[0046] The breech block 10 also has an ejector system 30 for pulling out cartridge cases or cartridge bases from the breech block 10. The ejector system 30 comprises at least one ejector 32 and at least one ejector lever 34, which actuates the ejector 32.

[0047] The ejector lever 34 is rotationally movably mounted on the opener shaft 22 and the ejector system has at least one transmission element 40, which transmits a rotational movement of the opening lever 22 to the ejector lever 34.

[0048] FIG. 2 shows a schematic perspective enlarged view of the breech block having the ejector system 30 from FIG. 1. As can be seen more clearly from FIG. 2, the transmission element 40 is mounted on a first axis 43, which is spaced from the opener shaft 20. The first axis 43 is attached to the underside of the breech end 12 with appropriate bearings, which support the axis 43.

[0049] At one end 41a of the transmission element 40 at least a first contact roller 42 is arranged for contact with the opening lever 22. Furthermore, at least a second contact roller 44 for contact with the at least one ejector lever 34 is arranged at the first end 41a of the transmission element 40.

[0050] The at least one first contact roll 42 and the at least one second contact roll 44 are arranged on a common second axis 46.

[0051] The ejector system 30 has at least one preload element 50 that the transmission element 40 preloads against the at least one ejector lever 34. According to the embodiment, the preload element 50 is a spring arranged at a second end 41b of the transmission element 40.

[0052] As shown in FIG. 1 and FIG. 2, the transmission element 40 is embodied as a lever. As can be seen in FIG. 3a, the first end 41a has two fork-like protrusions on which the axis 46 is arranged. The second end 41b is arranged on the opposite side of the transmission element 40 and angled to the first end 41a.

[0053] In FIG. 1 and FIG. 2 it can be seen that two ejector levers 34 are formed, for each of which a second contact roller 34 is formed.

[0054] FIG. 3a shows a schematic side view of the ejector system 30 of the inventive breech block 10, wherein the breech wedge 14 is in a closed position. FIG. 3b shows a schematic side view of the ejector system 30 of the inventive breech block 10 according to FIG. 3a, wherein the breech wedge 14 is in the open position.

[0055] The at least one ejector lever 34 has a first lever arm 36 with an arc-shaped contact surface 38, which is permanently in contact with the at least one second contact roller 44.

[0056] Furthermore, the ejector lever 34 has a second lever arm 38, as can be seen in FIG. 1. The second lever arm 38 is used to operate the ejector 32.

[0057] The contact surface 38 of the first lever arm 36 is essentially concave, so that when opening the breech block 10, the rotation angle of the rotational movement of the ejector lever 34 in relation to the rotation angle of the rotational movement of the opening lever 22 describes a progressive characteristic curve.

[0058] The opening lever 22 is designed in such a way that it is not in contact with the first contact roller 42 in the open position of the breech block 10 and the first contact roller 42 can be brought into contact with the opening lever 22 in the course of the opening process.

[0059] As can be seen in FIG. 3a and FIG. 3b, the opening lever 22 has a protrusion with a contact surface 23 which can be brought into contact with the first contact roller 42. The contact surface 23 of the opening lever 22 is essentially flat.

[0060] FIG. 4 shows a schematic diagram of the rotation angle of the opening lever 22 and the rotation angle of the ejector lever 34 in relation to the forward movement. The diagram shows that in relation to the forward movement, the angle of rotation of the opener shaft 20 changes linearly and the angle of rotation of the ejector 32 describes a progressive characteristic curve.

[0061] FIG. 5 shows a schematic rear view of the breech block 10 according to the invention in an open position with open cartridge bearing 11. The breech wedge 14 is in the open position and the ejector 32 is clearly visible. The view shown in FIG. 5 shows the ejector 32 after ejection of a cartridge base or a cartridge case.

[0062] The invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are to be included within the scope of the following claims.