Cartridge case withdrawing mechanism

Abstract

The invention discloses a cartridge case withdrawing mechanism, and belongs to the technical field of weaponry. The mechanism comprises a spring reset assembly, a base and an ejection plate, the spring reset assembly is installed on the front face of the base and connected with the shell ejection plate, the spring reset assembly fixes the shell ejection plate in a groove in the back face of the base through spring pre-tightening force, the spring reset assembly is pressed downwards to eject the shell ejection plate out of the groove by a certain distance during shell ejection, and the shell and the shell ejection plate move synchronously. And then the spring reset assembly is loosened, the spring pre-tightening force is used for resetting the shell withdrawing plate, the shell shell keeps still under the action of friction force between the shell shell and the shell loading groove of the base, the shell shell protrudes out of the shell withdrawing plate by a certain distance, the shell shell is taken out of the shell withdrawing plate through a tool, and the shell shell withdrawing action is completed. According to the mechanism, the operation steps of a shooter can be simplified, the cartridge case withdrawing process is stable and reliable, and the mechanism can automatically reset without blockage after cartridge case withdrawing is completed.

Description

Technical Field

[0001] The invention relates to the technical field of weapon equipment, and in particular to a cartridge case ejection mechanism for a multi-tube launcher. Background Art

[0002] Shell extraction refers to the process where the high-temperature and high-pressure gas generated by the combustion of gunpowder pushes the shell at the bottom of the shell to separate from the shell after the shell is fired. The shell needs to be ejected after the firing is completed. After the shell is fired, the shell will be deformed by heat and pressure, making it fit the gun barrel, making it difficult to remove the shell, making it inconvenient to fire the next round of ammunition, and affecting the firepower output of the artillery.

[0003] The traditional shell extraction method generally uses other auxiliary mechanisms or parts to manually push the shell out of the magazine for a certain distance and then remove it manually. This shell extraction method increases the shooter's operating steps, prolongs the time for the shooter to fire ammunition, and weakens the firepower output during combat time. Summary of the invention

[0004] In view of this, the present invention provides a shell ejection mechanism, which can simplify the operating steps of the shooter, the shell ejection process is stable and reliable, and the mechanism can automatically reset without jamming after the shell ejection is completed.

[0005] A shell ejection mechanism comprises a spring return assembly, a base and an ejection plate;

[0006] The back of the base is processed with a groove to accommodate the shell ejection plate. The depth of the groove is consistent with the thickness of the shell ejection plate. The shell ejection plate is processed with a loading ring groove. The number and shape of the loading ring groove are consistent with the loading groove on the base.

[0007] The spring reset assembly is installed on the front side of the base and connected to the ejector plate. The spring reset assembly fixes the ejector plate in the groove on the back side of the base by the spring preload force. When ejecting a shell, the spring reset assembly is pressed down to push the ejector plate out of the groove for a distance. The shell and the ejector plate move synchronously. Then the spring reset assembly is released to reset the ejector plate by the spring preload force. The shell remains stationary under the friction between the shell and the loading groove of the base. The shell protrudes from the ejector plate for a distance. The shell is taken out from the ejector plate by a tool to complete the ejection action.

[0008] Furthermore, the spring return assembly includes a shell extraction handle, a shell extraction pressure plate, a pin, a connecting rod, a shell extraction shaft, a shell extraction spring and a support rod;

[0009] The end of the shell extraction handle is movably connected to the front face of the base through a support rod, the middle section of the shell extraction handle is connected to one end of a connecting rod, the other end of the connecting rod is slidably matched with a strip groove on the shell extraction pressure plate through a pin shaft, the two ends of the shell extraction pressure plate are fixedly connected to one end of the shell extraction shaft, the other end of the shell extraction shaft is fixedly connected to the shell extraction plate after passing through a through hole on the base, the shell extraction spring is sleeved on the shell extraction shaft, and the two ends of the shell extraction spring are respectively in conflict with the shell extraction pressure plate and the base.

[0010] Furthermore, a rolling bearing is installed on the pin shaft, and the rolling bearing cooperates with the strip groove on the shell extraction pressure plate.

[0011] Furthermore, there is a clearance fit between the shell casing and the circular loading groove on the ejection plate.

[0012] Furthermore, two groups of spring return assemblies are installed on the base.

[0013] Beneficial effects:

[0014] 1. The present invention installs an ejection plate on the back of the base and a spring return assembly on the front, and uses the spring return assembly to push the ejection plate outward to bring the fired shell out of the base for a distance, thereby avoiding the traditional ejection method of using other additional mechanisms or parts to manually take out the shell. Only one downward pressing action is required to complete the ejection and ejection of the shell, which can simplify the operation steps of the shooter and save the shooter's time in firing ammunition.

[0015] 2. The spring reset assembly of the present invention adopts a shell ejection handle, a shell ejection pressure plate, a connecting rod and a support rod to form a linked four-bar linkage. The shell ejection shaft and the shell ejection spring provide guidance and reset support for the four-bar linkage. The downward pressure is directly transmitted to the shell ejection pressure plate by the shell ejection handle through the connecting rod and the pin shaft. Since the pin shaft and the strip groove on the shell ejection pressure plate are in sliding fit, the shell ejection process is stable and reliable, and the mechanism can automatically reset without jamming after the shell ejection is completed.

[0016] 3. The present invention installs a rolling bearing on the pin shaft, and the rolling bearing cooperates with the strip groove on the shell extraction pressure plate. The rolling bearing is used to further reduce the friction between the pin shaft and the strip groove, thereby ensuring the smooth operation of the mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure is a schematic diagram of the composition of the shell ejection mechanism of the present invention (before ejection);

[0018] Figure 2 The figure is a schematic diagram of the composition of the shell ejection mechanism of the present invention (during shell ejection);

[0019] Figure 3 The figure is a schematic diagram of the composition of the shell ejection mechanism of the present invention (after ejection);

[0020] Figure 4It is a side view of the cartridge case ejection mechanism of the present invention.

[0021] Among them, 1-shell ejection handle, 2-shell ejection pressure plate, 3-pin shaft, 4-connecting rod, 5-shell ejection shaft, 6-shell ejection spring, 7-support rod, 8-base, 9-shell ejection plate, 10-shell. DETAILED DESCRIPTION

[0022] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0023] As attached Figure 1-4 As shown, the present invention provides a shell ejection mechanism, the entire mechanism is installed on a base 1, and the mechanism includes a shell ejection handle 1, a shell ejection pressure plate 2, a pin shaft 3, a connecting rod 4, a shell ejection shaft 5, a shell ejection spring 6, a support rod 7, a base 8 and a shell ejection plate 9.

[0024] Among them, a groove for accommodating the shell ejection plate is processed on the back of the base 8, and the depth of the groove is consistent with the thickness of the shell ejection plate 9. The shell ejection plate 9 is processed with a loading ring groove, and the number and shape of the loading ring groove are consistent with the loading groove on the base 1.

[0025] The end of the shell extraction handle 1 is movably connected to the front of the base 8 through the support rod 7, the middle section of the shell extraction handle 1 is connected to one end of the connecting rod 4, the other end of the connecting rod 4 is slidably matched with the strip groove on the shell extraction pressure plate 2 through the pin shaft 3, the two ends of the shell extraction pressure plate 2 are fixedly connected to one end of the shell extraction shaft 5, the other end of the shell extraction shaft 5 passes through the through hole on the base 8 and is fixedly connected to the shell extraction plate 9, the shell extraction spring 6 is sleeved on the shell extraction shaft 5, and the two ends of the shell extraction spring 6 are respectively in conflict with the shell extraction pressure plate 2 and the base 8. The pre-tightening force of the shell extraction spring 6 fixes the shell extraction plate 9 in the groove on the back of the base 8. The shell extraction handle 1, the shell extraction pressure plate 2, the pin shaft 3, the connecting rod 4, the shell extraction shaft 5, the shell extraction spring 6 and the support rod 7 constitute a spring reset assembly. In this embodiment, two groups of spring reset assemblies are provided on the base 8.

[0026] Before firing, place the shell in the loading groove of the ejector plate 9, close the breech block, fire the shell, and the shell is ejected from the launch tube, leaving the shell casing 10 in the loading groove of the ejector plate 9. Figure 1 Open the breech block, pull the ejection handle 1, the pulling force is transmitted to the ejection pressure plate 2 through the connecting rod 4 and the pin 3, the ejection pressure plate 2 pushes the ejection plate 9 out of the groove of the base 8 through the ejection shaft 5, and the ejection pressure plate 2 compresses the ejection spring 6 at the same time, the shell 10 moves synchronously with the ejection plate 9, and the ejection plate 9 pushes the shell 10 to the right by 15mm, as shown in the attached figure. Figure 2 Release the ejection handle 1, the ejection plate 9 is reset under the action of the ejection spring 6, and the shell 10 protrudes 15mm from the ejection plate, as shown in the attached figure. Figure 3 As shown, the shell casing 10 can be easily taken out by hand to complete the ejection. This structure has been tested many times and is stable and reliable, and the ejection is stable and without jamming.

[0027] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cartridge ejection mechanism, characterized in that: Includes a spring return assembly, a base and an ejector plate; The back of the base is processed with a groove to accommodate the shell ejection plate. The depth of the groove is consistent with the thickness of the shell ejection plate. The shell ejection plate is processed with a loading ring groove. The number and shape of the loading ring groove are consistent with the loading groove on the base. The spring reset assembly is installed on the front side of the base and connected to the ejector plate. The spring reset assembly fixes the ejector plate in the groove on the back side of the base by the spring preload force. When ejecting a shell, the spring reset assembly is pressed down to push the ejector plate out of the groove for a distance. The shell and the ejector plate move synchronously. Then the spring reset assembly is released to reset the ejector plate by the spring preload force. The shell remains stationary under the friction between the shell and the loading groove of the base. The shell protrudes from the ejector plate for a distance. The shell is taken out from the ejector plate by a tool to complete the ejection action.

2. A cartridge ejection mechanism as claimed in claim 1, characterized in that: The spring return assembly includes an ejection handle, an ejection pressure plate, a pin, a connecting rod, an ejection shaft, an ejection spring and a support rod; The end of the shell extraction handle is movably connected to the front face of the base through a support rod, the middle section of the shell extraction handle is connected to one end of a connecting rod, the other end of the connecting rod is slidably matched with a strip groove on the shell extraction pressure plate through a pin shaft, the two ends of the shell extraction pressure plate are fixedly connected to one end of the shell extraction shaft, the other end of the shell extraction shaft is fixedly connected to the shell extraction plate after passing through a through hole on the base, the shell extraction spring is sleeved on the shell extraction shaft, and the two ends of the shell extraction spring are respectively in conflict with the shell extraction pressure plate and the base.

3. A cartridge ejection mechanism as claimed in claim 2, characterized in that: A rolling bearing is installed on the pin shaft, and the rolling bearing cooperates with the strip groove on the shell ejection pressing plate.

4. A cartridge ejection mechanism as claimed in claim 3, characterized in that: There is a clearance fit between the shell casing and the circular loading groove on the ejector plate.

5. A cartridge ejection mechanism as claimed in claim 3 or 4, characterized in that: The spring return assembly is installed in two groups on the base.

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