A gun barrel structure capable of changing its length
By designing a barrel structure that can change the length, using the threaded connection between multiple barrel extension sections and the first section of the barrel, the problem of poor portability caused by the fixed barrel length is solved, and the gun carriage length is shortened and the shooting accuracy is maintained.
Patent Information
- Application Number
- CN202421609798.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-09
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-07-09
AI Technical Summary
The length of existing gun barrels is fixed and difficult to change, which affects portability and when it is necessary to disassemble or fold, the barrel as the longest component becomes a portable bottleneck.
A barrel structure that can change the length is designed. By setting up multiple barrel extension sections and the barrel head section, the barrel length is adjusted by using threaded connections. The inner holes of the barrel head section and the extension section are both rifled to maintain aligned state.
It realizes flexible adjustment of barrel length, reduces the carrying length of the gun, and has a small impact on shooting accuracy, making it easy to operate.
Smart Images
Figure CN222718790U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of light weapons, in particular to a gun barrel structure capable of changing its length. Background Art
[0002] The barrel is the most critical part of a firearm, which gives the projectile its initial velocity and direction. Since the barrel is subjected to great force during shooting, the bore requires high precision, and has rifling, all current firearm barrels are integral parts. If the barrel length needs to be changed, the barrel or barrel assembly must be replaced as a whole. In addition, for firearms that need to be carried concealed, even if they can be disassembled or folded, the barrel is often the longest part, becoming a bottleneck for carrying. It is necessary to design a structure that can change the barrel length. Utility Model Content
[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a gun barrel structure capable of changing its length, which can directly increase or shorten the gun barrel length by reducing or extending the tube, has little effect on shooting accuracy, is easy to operate, does not affect accuracy, and can significantly shorten the carrying length of the firearm.
[0004] The purpose of the utility model is achieved in this way:
[0005] A gun barrel structure capable of changing its length comprises a gun barrel head section and a gun barrel extension section which are arranged in sequence, the number of the gun barrel extension sections being multiple, each gun barrel extension section being numbered in a connection sequence, a cartridge chamber and a connection structure being arranged at the rear end of the gun barrel head section, the connection structure being used to connect with a receiver / section sleeve, rifling being arranged in the inner holes of the gun barrel head section and the gun barrel extension section, the gun barrel head section and the gun barrel extension section being threadedly connected and fixed in sequence to form a gun barrel body, and the rifling in the inner holes of the gun barrel head section and the gun barrel extension section being in an aligned state;
[0006] In the two adjacent sections of the gun barrel body, the first section is provided with an external thread and the second section is provided with an internal thread. The external thread of the first section is connected and fixed with the internal thread of the second section. The facing ends of the first section and the second section are respectively provided with mounting structures, and the mounting structures are used to cooperate with the mounting tools. The mounting structure is provided with axial scale lines, and the scale lines on the first section and the second section are aligned. The first section is provided with a positioning step surface, and the positioning step surface is located between the mounting structure and the external thread. The positioning step surface contacts and positions the end face of the second section.
[0007] Preferably, the plurality of barrel extensions have different lengths.
[0008] Preferably, the installation structure is a notch structure, and the installation tool is a wrench.
[0009] Preferably, the threads on each section of the barrel body are single-start, fine-pitch threads.
[0010] Preferably, the threading on each section of the barrel body is opposite to the hand direction of the rifling.
[0011] Preferably, the depth of the internal thread on the second section is greater than the length of the external thread on the first section.
[0012] Preferably, the barrel is the barrel of a folding pistol.
[0013] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:
[0014] The utility model designs the barrel blank into a structure of multiple sections connected by threads. After the connection, the barrel is subjected to the processes of reaming, straightening, processing the inner bore, outer circle, numbering and marking. After the processing is completed, the barrel can be disassembled. As long as it is reassembled according to the marking and numbering, the accuracy and straightness of the barrel inner bore will not change, and the rifling is still in an aligned state, so the shooting accuracy is less affected. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the first section of the barrel blank, 1-first section of the barrel, 101-inner hole of the first section of the barrel, 102-external thread of the first section of the barrel, 103-installation structure;
[0016] Figure 2 Schematic diagram of the barrel extension blank, 2-barrel extension, 201-inner hole of the barrel extension, 202-external thread of the barrel extension, 203-internal thread of the barrel extension;
[0017] Figure 3 This is a schematic diagram of the barrel blank, 1-barrel head section, 2-barrel extension section 1, 3-barrel extension section 2;
[0018] Figure 4 This is a schematic diagram of the barrel body after the inner bore, outer circle and mounting structure are processed, 1- barrel first section, 2- barrel extension section one, 3- barrel extension section two, 104- chamber, 105- barrel first section rifling, 205- barrel extension section one rifling, 301- barrel extension section two rifling.
[0019] Figure 5 It is a schematic diagram of the installation structure and the engraved lines, 501-installation structure, 502-engraved lines, 503-position of the setting number. DETAILED DESCRIPTION
[0020] The utility model is further described below with reference to the accompanying drawings.
[0021] See also Figure 4A gun barrel structure capable of changing its length comprises a gun barrel first section 1 and a gun barrel extension section 2 which are arranged in sequence, the number of the gun barrel extension sections being multiple, each gun barrel extension section being numbered in a connection sequence, a cartridge chamber 104 and a connection structure being arranged at the rear end of the gun barrel first section 1, the connection structure being used for connecting with a receiver / section sleeve, rifling being arranged in the inner holes of the gun barrel first section 1 and the gun barrel extension section 2, the gun barrel first section 1 and the gun barrel extension section 2 being threadedly connected and fixed in sequence to form a gun barrel body, the rifling in the inner holes of the gun barrel first section 1 and the gun barrel extension section 2 being aligned.
[0022] In the two adjacent sections of the gun barrel body, the first section is provided with an external thread and the second section is provided with an internal thread. The external thread of the first section is connected and fixed with the internal thread of the second section. The facing ends of the first section and the second section are respectively provided with mounting structures 501, and the mounting structures 501 are used to cooperate with the mounting tools. The mounting structure 501 is provided with axially engraved lines 502, and the engraved lines 502 on the first section and the second section are aligned. The first section is provided with a positioning step surface, which is located between the mounting structure 501 and the external thread, and the positioning step surface contacts and positions the end face of the second section.
[0023] In this embodiment, the gun barrel is a gun barrel of a folding pistol. The mounting structure 501 is a notch structure, and the mounting tool is a wrench. The threads on each section of the gun barrel body are single-start, fine-pitch threads. The thread rotation direction on each section of the gun barrel body is opposite to the rotation direction of the rifling. The depth of the internal thread on the second section is greater than the length of the external thread on the first section.
[0024] Preparation method:
[0025] First need to determine the distribution scheme of gun barrel length, this needs to be determined in conjunction with actual needs. For example, a gun barrel of 600 mm in length can be made up of different combinations such as 2 300 mm, 3 200 mm, 1 400 mm plus 2 100 mm. Under the premise of meeting the demand, the number of sections of the gun barrel should be as little as possible. The present embodiment adopts a structure in which a 600-length gun barrel is decomposed into 300+150+150, and the gun barrel length can be changed between 300 mm, 450 mm, and 600 mm.
[0026] The barrel is divided into the barrel head section and the barrel extension section. The barrel head section needs to be processed with the chamber and the connection structure with the receiver or the sleeve. The barrel extension section needs to be processed with the interface connected with the barrel head section or other barrel extension sections. The last barrel extension section can eliminate one connection structure.
[0027] The first section of the barrel is as follows Figure 1As shown, to ensure coaxiality, both the inner hole and the outer circle have machining allowances. The outer circle is machined with notches, holes or other mounting structures that can be used to tighten or loosen the two sections of the gun barrel using tools. This embodiment adopts a notch structure, which can be tightened or loosened using a wrench. One end of the first section of the gun barrel is machined with threads, which can be external threads or internal threads. This embodiment adopts an external thread structure.
[0028] The blank of the barrel extension is as follows Figure 2 As shown in the figure, one end is processed with internal thread and the other end is processed with external thread. The number of threads, direction of rotation, diameter, pitch, precision grade and other parameters need to be kept completely consistent. To ensure the firmness of the connection, the thread is preferably single-start, fine-pitch thread, and the direction of rotation of the thread should be opposite to that of the rifling. It should be noted that the length of the external thread should be slightly greater than the depth of the internal thread to ensure that the rear end face fits tightly after installation.
[0029] according to Figure 3 The barrel blank sections are assembled together and tightened in place according to a certain torque to ensure end face contact. After the multiple barrel blank sections are assembled into a barrel blank of a specific length, the inner holes are finely reamed to make the inner holes of each blank section completely coaxial.
[0030] Straighten the finely reamed barrel blank, and then process the rifling. Due to the existence of threads, the rifling can only be processed by broaching, wire extrusion or electrolysis, and cannot be processed by fine forging, otherwise it will be impossible to disassemble. After the rifling is completed, the outer circle of the barrel is processed based on the axis of the inner bore, and the notches, holes or other structures that can be used to tighten or loosen the two sections of the barrel with tools can be reprocessed as needed. After the above processes are completed, the chamber and other barrel structures can be processed according to the original barrel processing technology. The processed barrel is like Figure 4 As shown, at this time the size and coaxiality of the barrel meet the requirements, and the rifling is aligned.
[0031] Mark the joints of the two barrel sections with a line as a mark for when the barrels are installed, and number the installation sequence at the appropriate locations. Figure 5 shown.
[0032] To change the barrel length:
[0033] When a 450mm barrel length is required, barrel extension section 2 can be unscrewed from the joint position.
[0034] When a 300mm barrel is needed, the barrel extension section 1 can be unscrewed from the joint. At this time, the barrel length is the shortest, so the carrying length of the whole gun is not restricted by the original 600mm barrel length, and the carrying length is directly shortened by 300mm. In combination with the folding stock or other folding mechanism of the gun, the carrying length of the gun can be greatly shortened.
[0035] When needs increase the gun barrel length, use spanner or other tools that the gun barrel extension is screwed on in order, and make the score line to it, the score line alignment can guarantee the coaxiality of the inner chamber and the alignment of the rifling.As when the gun barrel length is 300 millimeters, screwing on the gun barrel extension 1 can become 450 millimeters, then screwing on the gun barrel extension 2 on the gun barrel extension 1 can become 600 millimeters.It should be noted that the gun barrel extension must be installed in order, and the gun barrel first section can not directly install the gun barrel extension 2 in the present embodiment, otherwise the rifling can not be aligned, thereby affects the shooting accuracy.Simultaneously, the gun barrel extension and the gun barrel first section or other gun barrel extension must align the score line after installation, otherwise the shooting accuracy can also be affected.
[0036] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the utility model.
Claims
1. A gun barrel structure capable of changing its length, characterized in that: The invention comprises a barrel head section and a barrel extension section which are arranged in sequence, wherein the number of the barrel extension sections is multiple, and each barrel extension section is numbered in the order of connection, a chamber and a connection structure are arranged at the rear end of the barrel head section, and the connection structure is used to connect with a receiver or a sleeve, and rifling is arranged in the inner holes of the barrel head section and the barrel extension section, and the barrel head section and the barrel extension section are threadedly connected and fixed in sequence to form a barrel body, and the rifling in the inner holes of the barrel head section and the barrel extension section are aligned; In the two adjacent sections of the gun barrel body, the first section is provided with an external thread and the second section is provided with an internal thread. The external thread of the first section is connected and fixed with the internal thread of the second section. The facing ends of the first section and the second section are respectively provided with mounting structures, and the mounting structures are used to cooperate with the mounting tools. The mounting structure is provided with axial scale lines, and the scale lines on the first section and the second section are aligned. The first section is provided with a positioning step surface, and the positioning step surface is located between the mounting structure and the external thread. The positioning step surface contacts and positions the end face of the second section.
2. A gun barrel structure capable of changing length according to claim 1, characterized in that: Multiple barrel extensions are available in different lengths.
3. The gun barrel structure capable of changing its length according to claim 1, characterized in that: The installation structure is a notch structure, and the installation tool is a wrench.
4. The gun barrel structure capable of changing length according to claim 1, characterized in that: The threads on each section of the barrel body are single-start, fine-pitch threads.
5. The gun barrel structure capable of changing length according to claim 1, characterized in that: The threads on the barrel sections have a rotation direction opposite to the rifling.
6. The gun barrel structure capable of changing length according to claim 1, characterized in that: The depth of the internal thread on the second section is greater than the length of the external thread on the first section.
7. The gun barrel structure capable of changing its length according to claim 1, characterized in that: The barrel is that of a folding pistol.