A shell structure of a projectile and a method of assembling the same

Abstract

The application relates to the technical field of aerospace projectile and arrow body structure, and provides a shell structure of a projectile and arrow body and an assembling method thereof, which comprises a shell, an end frame is arranged on the shell, and adjacent shells are connected through the end frame; a steel cable support is fixedly arranged on the shell and the end frame; a separation steel cable is connected to the steel cable support and used for pulling a cable joint when the projectile and arrow body are separated; and the steel cable support is a precipitation hardening stainless steel support. The problems that the steel cable support in the prior art cannot meet the high-temperature scouring load standard are solved.

Description

Technical Field

[0001] This application relates to the field of aerospace projectile body structure technology, and more specifically, to a projectile body shell structure and its assembly method. Background Technology

[0002] Cable support is a common component in projectile body (arrow body) structures. Its main function is to connect the separation cable to the outer shell of the projectile body (arrow body) and to provide a connection port and fixing plane for the hook of the separation cable, ensuring the reliability of the separation cable when the plug is pulled out. It is widely used in projectile body structures.

[0003] Because the cable supports are typically located near the lower separation surface of the engine nozzle on the rocket body, they need to withstand the high-temperature scouring load of the engine exhaust. Therefore, the scouring resistance of the cable supports is required to be high. However, existing cable supports cannot meet the high-temperature scouring load standards.

[0004] Therefore, existing technologies still need to be improved and developed. Summary of the Invention

[0005] The purpose of this application is to provide a shell structure for a projectile body and its assembly method, which solves the problem that the steel cable support in the prior art cannot meet the high temperature erosion load standard.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: On one hand, this application provides a shell structure for a projectile body, comprising: The housing has end frames, and adjacent housings are connected through the end frames. The steel cable support is fixedly installed on the shell and end frame; The separation cable is attached to the cable support and is used to pull the cable joint when the projectile body separates. The cable support is made of precipitation-hardened stainless steel.

[0007] In an optional embodiment, the cable support includes: an axial fixing part, on which a first through hole is provided, the first through hole being used to pass through a first threaded member and connect it to the housing; A radial extension is connected to the axial fixing part and extends radially away from the housing. A second through hole is provided on the radial extension for a second screw to be threaded through and connected to the end frame. A limiting port is provided on the radial extension for a separation steel cable to be threaded through. The reinforcing ribs are located on both sides of the axial fixing part and are fixedly connected to the axial fixing part and the radial extension part. The axial fixing part, radial extension part, and reinforcing rib part are all made of precipitation-hardened stainless steel plates.

[0008] In an optional embodiment, the reinforcing rib portion includes at least two reinforcing rib plates, which are respectively disposed on both sides of the axial fixing portion; One side of the reinforcing rib extends to the top of the axial fixing part, and the other side extends to the outer end of the radial extension part.

[0009] In an optional embodiment, the reinforcing rib is a right-angled triangular rib; The thickness of the reinforcing rib, the thickness of the axial fixing part, and the thickness of the radial extension part are the same.

[0010] In one optional embodiment, the thickness of the reinforcing rib is 3-6 mm; The inclination angle of the hypotenuse of a right-angled triangular rib is 15°-45°.

[0011] In an optional embodiment, a chamfer is provided at the connection between the side of the axial fixing portion facing away from the reinforcing rib and the side of the radial extension portion facing away from the reinforcing rib; The chamfer is rounded.

[0012] In an optional embodiment, the side of the axial fixing part facing away from the reinforcing rib is an arc-shaped surface.

[0013] In an optional embodiment, there are two first perforations, which are arranged side by side and spaced apart along the circumference of the arrow body.

[0014] In an optional embodiment, the limiting opening is a notch; The notch includes: the long strip and the open end; The separating steel cable enters the long section through the open end.

[0015] In an optional embodiment, the elongated segment is inclined to the centerline of the radial extension in the left-right direction.

[0016] In one optional embodiment, multiple long strips are provided, with at least two adjacent long strips connected to form a bend.

[0017] In an optional embodiment, a safety hole is provided on the reinforcing rib, which is used to connect a safety device to keep the release cable confined in the notch.

[0018] On the other hand, this application also proposes a shell structure assembly method, which is applied to the shell structure of the projectile body as described above. The shell structure assembly method includes: Confirm the installation position of the cable support on the shell and end frame. The radial extension is connected to the end frame by means of a second screw threaded through the second through hole along the axial direction, wherein no locking torque is applied during the connection process; A connection hole is made on the surface of the housing through the first perforation; The first screw is passed through the first through hole and the connecting hole to radially connect the axial fixing part to the housing and apply a locking torque; Apply a locking torque to the second screw connector to complete the installation of the cable support.

[0019] The beneficial effects of the projectile shell structure and its assembly method provided in this application are at least as follows: The steel cable support is formed directly from precipitation-hardening stainless steel through machining. After machining, the steel cable support undergoes heat treatment and passivation, thereby improving its mechanical properties. Precipitation-hardening stainless steel cable supports possess advantages such as high strength, good corrosion resistance, and strong resistance to stress corrosion cracking. Their load-bearing capacity is significantly enhanced under high temperature, high pressure, and high load conditions. They maintain good corrosion resistance in harsh environments such as strong acids, strong alkalis, and high salt concentrations. During heat treatment, especially in welding and cold working processes, they maintain stable structural performance. Furthermore, precipitation-hardening stainless steel cable supports also have good machinability, wear resistance, and thermal stability. Therefore, the steel cable support in this solution has advantages such as high rigidity, erosion resistance, and high reliability. When installed on the shell and end frame, it not only fully meets the harsh environmental requirements of engine exhaust side erosion but also improves tensile strength, thereby preventing the separation cable from bending and failing during operation. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a front view of the outer shell structure of the projectile body provided in an embodiment of this application; Figure 2 This is a schematic diagram of the steel cable support structure of the projectile body's outer shell provided in an embodiment of this application; Figure 3 Another structural schematic diagram of the cable support for the outer shell structure of the projectile body provided in the embodiments of this application; Figure 4 A schematic diagram of the main parts of the outer shell structure of the projectile body provided in the embodiments of this application; Figure 5 A top view of a first structure of the steel cable support for the outer shell structure of the projectile body provided in this application embodiment; Figure 6A top view of another form of the first structure of the steel cable support for the outer shell structure of the projectile body provided in the embodiments of this application; Figure 7 A top view of a second structure of the steel cable support for the outer shell structure of the projectile body provided in this application embodiment; Figure 8 A top view of a third structure of the cable support for the outer shell structure of the projectile body provided in this application embodiment; Figure 9 This is a flowchart illustrating a shell structure assembly method provided in an embodiment of this application.

[0022] The following are the labeling elements in the figure: 10. Arrow body; 11. Shell; 12. End frame; 13. Cable support; 14. Separating cable; 100. Axial fixing part; 110. First through hole; 120. First bolted connector; 121. Radial bolt; 130. Chamfer; 140. Arc-shaped surface; 200. Radial extension part; 210. Second through hole; 220. Second bolted connector; 221. Axial bolt; 230. Limiting port; 231. Notch; 232. Open end; 233. Long strip; 234. Bending shape; 300. Reinforcing rib; 310. Reinforcing rib plate; 320. Safety hole. Detailed Implementation

[0023] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0024] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it may be directly or indirectly located on that other component. When a component is referred to as "connected to" another component, it may be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate orientations or positions based on the accompanying drawings, and are for ease of description only, and should not be construed as limiting the technical solution. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "A plurality" means two or more, unless otherwise explicitly defined.

[0025] The existing rocket casing structure's cable support not only needs to withstand the high-temperature scouring load of the engine exhaust, but also experiences a significant moment of tension at the end of the cable support used to connect the separation cable when the cable connector is pulled. This can lead to bending moments in the cable support and even failure of the separation cable. Therefore, the rocket casing structure places high demands on the reliability and stability of the cable support. To address these issues, this application proposes the following embodiments, as detailed below: Example 1 like Figure 1 , Figure 4 As shown, this embodiment proposes a projectile shell structure, which is referred to as projectile body 10 for ease of structural description. The shell structure of projectile body 10 mainly includes: a cylindrical shell 11, an end frame 12 surrounding the shell 11, a cable support 13, and a separation cable 14. The shell structure of projectile body 10 is assembled by splicing the shells 11, and the ends of each shell 11 are connected to each other through the end frame 12 (similar to a flange connection). The cable support 13 is used to connect and fix the shell 11 and the end frame 12 of projectile body 10. The separation cable 14 can be connected to the cable support 13 by hooks and is used to pull the cable connector when the projectile body separates. The cable support 13 is a precipitation-hardening stainless steel support. The cable support 13 can be formed directly from precipitation-hardening stainless steel square steel through machining. After machining, the cable support 13 is subjected to heat treatment and passivation treatment to improve the mechanical properties of the projectile cable support. Precipitation-hardening stainless steel possesses advantages such as high strength, excellent corrosion resistance, and strong resistance to stress corrosion cracking. Its strength refers to its load-bearing capacity under high temperature, high pressure, and high load conditions, typically two to three times that of ordinary stainless steel. Its corrosion resistance refers to its ability to maintain good corrosion resistance in harsh environments such as strong acids, strong alkalis, and high salt concentrations. Its resistance to stress corrosion cracking refers to its ability to maintain stable structural properties during heat treatment, especially in welding and cold working processes. Furthermore, precipitation-hardening stainless steel also has good machinability, wear resistance, and thermal stability. Therefore, the steel cable support fully meets the harsh environmental requirements of engine exhaust side impact.

[0026] For ease of structural description, the axial direction of the rocket body 10 is used as the axial reference for each component, and the radial direction of the rocket body 10 is used as the radial reference for each component for directional description.

[0027] like Figure 1 , Figure 2 , Figure 4As shown, the cable support 13 in this embodiment mainly includes: an axial fixing part 100, a radial extension part 200, and a reinforcing rib part 300. The axial fixing part 100 extends axially a predetermined distance and extends circumferentially around the housing 11 for a predetermined length. For ease of structural description, the circumferential extension direction of the axial fixing part 100 around the housing 11 is taken as the left-right direction. The axial fixing part 100 can be a plate-like structure. A first through hole 110 is provided on the axial fixing part 100. The first through hole 110 is used to pass through a first threaded member 120 and connect it to the housing 11. The first threaded member 120 can be a radial bolt 121. A matching connecting hole is provided on the housing 11. The axial fixing part 100 is screwed and fixed to the housing 11 by the cooperation of the radial bolt 121 and a nut. The radial extension part 200 can be a plate-like structure. The radial extension part 200 is connected to the axial fixing part 100, and can be specifically provided at the lower end of the axial fixing part 100. The radial extension 200 extends radially away from the arrow body 10, with a relatively long extension length that extends beyond the edge of the end frame 12, thereby fixing the radial extension 200 to the axial fixing part 100 to form an "L"-shaped structure. A second through hole 210 is provided on the radial extension 200 for inserting a second threaded connector 220 and connecting it to the end frame 12. The second threaded connector 220 can be a locking structure using an axial bolt 221 and a nut. The second through hole 210 can be positioned directly opposite the surface of the end frame 12. By passing the axial bolt 221 through the second through hole 210 and the end frame 12, and then locking it with a nut, the radial extension 200 is fixedly connected to the end frame 12. A limiting opening 230 for threading the separation cable 14 is provided on the radial extension 200. The limiting opening 230 is located on the surface of the radial extension 200 and on the side away from the housing 11 (the end of the radial extension 200 away from the housing 11 is the outer end). Since the outer end of the radial extension 200 protrudes from the edge of the end frame 12, the limiting opening 230 is located in the area protruding from the end frame 12. Thus, when the separation cable 14 is threaded through the limiting opening 230, the separation cable 14 can be kept away from the edge of the end frame 12, thereby avoiding frictional interference between the separation cable and the end frame 12. The reinforcing ribs 300 are provided on both sides of the axial fixing part 100, specifically on the left and right sides of the axial fixing part 100 and the radial extension 200, and are fixedly connected to the axial fixing part 100 and the radial extension 200, thereby forming a "box-shaped" structure between the axial fixing part 100, the radial extension 200 and the reinforcing ribs 300.

[0028] In this embodiment, the axial fixing part 100, the radial extension part 200, and the reinforcing rib part 300 are all precipitation-hardening stainless steel plates. The use of precipitation-hardening stainless steel and the design of the steel cable bracket's plates with a certain thickness (e.g., 4mm) enable the steel cable bracket to fully meet the harsh environmental requirements of engine exhaust side scouring. After installation, the steel cable bracket provides a more stable connection foundation for the separation of the steel cables.

[0029] In this embodiment, the cable support 13, by providing a reinforcing rib 300 between the axial fixing portion 100 and the radial extension portion 200, allows the bent axial fixing portion 100 and the radial extension portion 200 to be fixedly connected through the reinforcing rib 300. This directly connects the connecting surface on the radial extension portion 200 used to support the separating cable with the connecting surface on the axial fixing portion 100 used to connect the arrow body 10, forming a "box-shaped" structure. This enhances the overall structural strength and optimizes the structural design. When the separating cable is in operation, the tensile and bending moment generated by the separating cable on the radial extension portion 200 is borne by the entire cable support due to the connection of the reinforcing rib 300, thus avoiding bending deformation caused by only the end of the radial extension portion 200 bearing the tensile and bending moment. Furthermore, the axial fixing part 100 is connected to the shell 11 of the arrow body 10 by a first screw 120 passing through the first through hole 110, and the radial extension part 200 is connected to the end frame 12 of the arrow body 10 by a second screw 220 passing through the second through hole 210. This not only fixes the axial fixing part 100, but also fixes the radial extension part 200 to the end frame 12 on the arrow body 10. The end frame 12 provides fixed support for the radial extension part 200, thereby greatly improving the rigidity and stability of the support when the separation steel cable is used.

[0030] like Figure 2 , Figure 4 As shown, further, the reinforcing rib 300 in this embodiment specifically includes at least two reinforcing rib plates 310, which are respectively disposed on both sides of the axial fixing part 100; the two reinforcing rib plates 310 are respectively fixedly connected to the axial fixing part 100 and the radial extension part 200 on the left and right sides. The cantilever structure of the radial extension part 200 is fixed to the axial fixing part 100 by the reinforcing rib plates 310, thereby increasing the load-bearing capacity of the structure, improving rigidity, and making it less prone to bending. One side of the reinforcing rib plate 310 extends to the top of the axial fixing part 100, and the other side extends to the outer end of the radial extension part 200. Therefore, the reinforcing rib plate 310 supports the entire stressed outer end of the radial extension part 200, increasing the load-bearing capacity of the outermost end of the radial extension part 200 and making it less prone to bending, further improving structural stability.

[0031] It is easy to imagine that more than three reinforcing ribs 310 can be provided, with multiple reinforcing ribs 310 arranged at intervals in the left-right direction, and the two sides of the reinforcing ribs 310 respectively fixedly connected to the axial fixing part 100 and the radial extension part 200, which can also achieve structural reinforcement. Alternatively, a single reinforcing rib 310 can be provided, with the axial fixing part 100 and the radial extension part 200 connected at the middle position in the left-right direction, which can also achieve structural reinforcement.

[0032] like Figure 2 , Figure 3 As shown, in this embodiment, the reinforcing rib 310 is a right-angled triangular rib. The triangular rib connected to the L-shaped structure facilitates manufacturing and can be directly cut from square steel, effectively reducing production costs while ensuring high structural strength. Therefore, in this embodiment, the thickness of the reinforcing rib 310, the thickness of the axial fixing part 100, and the thickness of the radial extension part 200 are the same. This facilitates processing, as it can be cut from standard square steel parts, thus avoiding welding and other processes, simplifying the production process. Furthermore, the same thickness can be obtained integrally, resulting in higher structural strength than welded structures, making them less prone to breakage and exhibiting stronger structural stability.

[0033] like Figure 2 , Figure 3 As shown, in this embodiment, the thickness of the reinforcing rib 310 is 3-6 mm, which is sufficient to resist the tensile and bending moments generated during the separation of the steel cable. In this embodiment, the specific thickness of the reinforcing rib 310 is 4 mm, the thickness of the axial fixing part 100 is 4 mm, and the thickness of the radial extension part 200 is 4 mm; this standard thickness of plate structure is relatively common and easy to process and produce.

[0034] like Figure 3 , Figure 4 As shown, further, in this embodiment, the inclination angle A of the hypotenuse of the right-angled triangular rib is 15°-45°. This inclination angle ensures good support for the radial extension 200 even when its radial extension length is relatively long. Specifically, in this embodiment, the inclination angle can be 17.5°. This angle guarantees the support performance of the radial extension 200 and provides sufficient length for the limiting opening 230, with the inner end of the limiting opening 230 located further from the end frame 12.

[0035] like Figure 3 , Figure 4 As shown, further, in this embodiment, a chamfer 130 is provided at the connection between the side of the axial fixing part 100 facing away from the reinforcing rib part 300 and the side of the radial extension part 200 facing away from the reinforcing rib part 300. That is, a chamfer 130 is provided at the corner of the L-shaped structure facing the housing 11. The chamfer 130 can avoid interference between the steel cable bracket 13 and the connection corner of the housing 11 and the end frame 12, thereby facilitating the assembly of the bracket and the housing 11 and providing good adaptability. In this embodiment, the chamfer 130 is a rounded corner. The rounded corner design can avoid the problem of stress concentration at the connection between the axial fixing part 100 and the radial extension part 200, thereby making the structure of the axial fixing part 100 and the radial extension part 200 stable and preventing breakage at the connection.

[0036] like Figure 3 , Figure 4 As shown, in this embodiment, the side of the axial fixing part 100 facing away from the reinforcing rib part 300 is an arc-shaped surface 140. Since the shell 11 of the arrow body 10 is circular, the inner side of the axial fixing part 100 is made of an arc-shaped surface 140 to match the circular shell 11, thereby making the arc-shaped surface 140 fit against the surface of the shell 11, ensuring better connection and stability between the cable support 13 and the shell 11. After the fixed connection, the cable support 13 is less likely to shake on the arrow body 10.

[0037] like Figure 2 , Figure 4 As shown, in this embodiment, two first perforations 110 are provided, and the two first perforations 110 are arranged side by side and spaced apart along the circumference of the arrow body 10. Two first perforations 110 are opened on the surface of the axial fixing part 100 and fixed to the housing 11 by screws, so that the steel cable bracket 13 is more stably connected to the housing 11.

[0038] like Figure 2 , Figure 4 As shown, further, in this embodiment, the diameter of the second through hole 210 is larger than that of the first through hole 110, so that a larger second screw connector 220 can be connected in the second through hole 210, thereby enhancing the connection stability. Moreover, the end frames 12 are typically mounted on the two housing sections 11. When the two housing sections 11 are connected, the two end frames 12 are usually fixed. Therefore, the second through hole 210 is aligned with the holes on the two end frames 12, allowing the axial bolt 221 to pass through the second through hole 210 and the holes on the two end frames 12 before being tightened with a nut. This allows the cable support 13 to be directly connected to the two end frames 12, achieving a three-layer connection and fixation method with one axial bolt 221. Both end frames 12 support the cable support 13 and are integrated with the entire arrow body 10, thereby greatly improving the rigidity and stability of the cable support 13 when the cable is separated.

[0039] like Figure 2 , Figure 5 As shown, in this embodiment, the limiting port 230 is a notch 231. The limiting port 230 can adopt various notch 231 structures. Specifically, the limiting port 230 includes an open end 232 formed on the outer end of the radial extension 200, and a long strip 233 arranged radially. The long strip 233 extends to the outside of the radial extension 200 through the open end 232. A hook connected to the separation cable enters the long strip 233 through the open end 232. The long strip 233 provides a connection position for the separation cable hook, so that during the separation process of the arrow body 10, the separated shell 11 drives the separation cable, thereby pulling the plug through the separation cable. The notch 231 structure is simple and highly practical.

[0040] In this embodiment, the notch 231 is parallel to and deviates from the centerline in the left-right direction.

[0041] like Figure 2 , Figure 6 As shown, in another type of limiting port 230 structure, in order to facilitate assembly and make it easier for the separation steel cable and hook to enter the notch 231, a flared mouth structure can be adopted at the opening end 232. In the specific structure, the diameter of the hole facing outward at the opening end 232 is large and the diameter facing the long strip 233 is small, so that the separation steel cable can be smoothly passed through the flared mouth into the notch 231.

[0042] like Figure 2 , Figure 7 As shown, in another second type of limiting port 230 structure, the elongated segment 233 of the limiting port 230 is inclined to the centerline in the left-right direction of the radial extension 200. When the separating steel cable and the hook enter through the inclined elongated segment 233, the separating steel cable is less likely to slip out of the limiting port 230, thereby achieving a relatively stable fixation of the separating steel cable by the steel cable bracket.

[0043] like Figure 2 , Figure 8 As shown, in another third type of limiting port 230 structure, the limiting port 230 has multiple segments 233 connected end to end, and at least two adjacent segments 233 form a bend 234. When the separating steel cable and hook enter from the inclined segment 233, the separating steel cable will be stuck at the bend 234, making it difficult for it to escape from the limiting port 230, thus achieving a more stable fixation of the separating steel cable by the steel cable bracket.

[0044] like Figure 2 , Figure 3 As shown, in this embodiment, the reinforcing rib 300 is provided with a safety hole 320, which is used to connect a safety device to confine the separating steel cable within the notch 231. The reinforcing ribs 310 on both sides are provided with Φ2mm safety holes 320. The safety device can be a thin iron wire or other rope, which can seal the notch 231, thereby preventing the separating steel cable from slipping out of the limiting opening 230, thus providing a safety function.

[0045] The verification results of the outer shell structure of the projectile in this implementation are as follows: the cable support passed the process of segment assembly, ground testing, and flight testing. The box-shaped structure formed by reinforcing ribs, the selection of precipitation-hardening stainless steel plates as structural materials, and the use of radial and axial fixing connections significantly improved the connection rigidity of the cable support. Furthermore, the cable support fully meets the harsh environmental requirements of engine exhaust side scouring. After installation, the cable support provides a more stable connection foundation for the separation cable, offering more reliable support for the separation cable operation and completely eliminating the risk of separation cable failure caused by cable support issues.

[0046] Example 2 like Figure 9 As shown, this embodiment proposes a shell structure assembly method, which is applied to the shell structure of the projectile body as described above. The shell structure assembly method specifically includes the following steps: Step S100: Confirm the installation position of the steel cable support on the housing and end frame.

[0047] Step S200: The radial extension is connected to the end frame by the second screw threaded through the second through hole along the axial direction, wherein no locking torque is applied during the connection process.

[0048] Step S300: A connection hole is made on the surface of the housing through the first perforation.

[0049] Step S400: Pass the first screw through the first through hole and the connecting hole to radially connect the axial fixing part to the housing and apply a locking torque.

[0050] Step S500: Apply a locking torque to the second screw connector to complete the installation of the cable support.

[0051] like Figure 4 As shown, in the specific process, the installation position of the cable support is first confirmed on the arrow body. Then, axial bolts 221 are inserted axially into the second through hole 210 to connect the radial extension 200 to the end frame 12. No torque is applied initially, i.e., the axial bolts 221 are not tightened. A connection hole is drilled in the housing 11 through the first through hole 110. After the connection hole is drilled, radial bolts 121 are used in conjunction with a nut to radially connect the axial fixing part 100 to the housing 11 through the first through hole 110 and the drilled connection hole, and torque is applied to tighten the radial bolts 121. Finally, the axial bolts 221 are connected to the nut, and torque is applied to tighten the axial bolts 221, thus completing the support installation.

[0052] In summary, the projectile shell structure and its assembly method proposed in this application utilize precipitation-hardening stainless steel to form the cable support, which not only enhances the strength and rigidity of the support itself but also resists the scouring of engine exhaust, improving durability. By providing reinforcing ribs between the axial fixing portion and the radial extension portion, the bent axial fixing portion and the radial extension portion are connected through these reinforcing ribs, thus forming a high-rigidity box-like structure. The projectile shell is connected to the end frame via multiple radial connections and a single axial bolt passing through a three-layer structure. This simultaneous fixation in two directions significantly improves the connection rigidity of the cable support. Therefore, the projectile shell structure possesses the advantages of high rigidity, scouring resistance, and high reliability.

[0053] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A projectile shell structure, characterized in that, include: A housing, wherein an end frame is provided on the housing, and adjacent housings are connected through the end frame; A steel cable support, which is fixedly mounted on the housing and the end frame; A separation cable, which is connected to the cable support and is used to pull out the cable connector when the projectile body separates; The cable support is a precipitation-hardening stainless steel support. The cable support includes: an axial fixing part with a first through hole for inserting a first threaded connector and connecting it to the housing; a radial extension part connected to the axial fixing part and extending radially away from the housing, with a second through hole for inserting a second threaded connector and connecting it to the end frame; and a reinforcing rib part disposed on both sides of the axial fixing part and fixedly connecting the axial fixing part and the radial extension part, so that the axial fixing part, the radial extension part, and the reinforcing rib part form a box-shaped structure. Wherein, the diameter of the second perforation is larger than the diameter of the first perforation; The radial extension is provided with a limiting opening for threading the separation steel cable; The limiting opening is a notch; The notch includes: a long strip and an open end; The separating steel cable enters the long strip through the open end; The elongated segment is inclined to the center line of the radial extension in the left and right directions; The long strips are provided in multiple ways, and at least two adjacent long strips are connected to form a bent shape; The reinforcing rib has a safety hole, which is used to connect a safety device so that the separation cable is confined in the notch.

2. The outer shell structure of the projectile body as described in claim 1, characterized in that, The axial fixing part, the radial extension part, and the reinforcing rib part are all precipitation-hardened stainless steel plates.

3. The outer shell structure of the projectile body as described in claim 2, characterized in that, The reinforcing rib portion includes: at least two reinforcing rib plates, and the at least two reinforcing rib plates are respectively disposed on both sides of the axial fixing portion; One side of the reinforcing rib extends to the top of the axial fixing part, and the other side extends to the outer end of the radial extension part.

4. The outer shell structure of the projectile body as described in claim 3, characterized in that, The reinforcing rib is a right-angled triangular rib. The thickness of the reinforcing rib, the thickness of the axial fixing portion, and the thickness of the radial extension portion are the same.

5. The outer shell structure of the projectile body as described in claim 2, characterized in that, A chamfer is provided at the connection between the side of the axial fixing part away from the reinforcing rib and the side of the radial extension part away from the reinforcing rib; The chamfer is a rounded corner.

6. The outer shell structure of the projectile body as described in claim 5, characterized in that, The side of the axial fixing part that faces away from the reinforcing rib is an arc-shaped surface.

7. A method for assembling a shell structure, characterized in that, The outer shell structure applied to the projectile body as described in any one of claims 2-6, wherein the assembly method of the outer shell structure includes: Confirm the installation position of the cable support on the shell and end frame. The radial extension is connected to the end frame by means of a second screw threaded through the second through hole along the axial direction, wherein no locking torque is applied during the connection process; A connection hole is formed on the surface of the housing through the first perforation; The first screw is passed through the first through hole and the connecting hole to radially connect the axial fixing part to the housing and apply a locking torque; Apply a locking torque to the second screw connector to complete the installation of the cable support.

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