Thin walled metal inflatable pole device

Abstract

The application discloses a kind of thin-walled metal inflatable rod devices, it is related to inflatable anti-instability rod technical field.The present application includes thin-walled metal pole body, the top of the thin-walled metal pole body is provided with closure, bottom is provided with opening, and the bottom of thin-walled metal pole body is coaxially installed with end cap, the center position of end cap is coaxially installed with inflatable guide rod, and inflatable guide rod penetrates end cap and with thin-walled metal pole body each other through.The bottom of the end cap is coaxially installed with base.The thin-walled metal inflatable rod of the present application is designed as a whole, the structure of thin-walled metal inflatable rod is divided into thin-walled metal pole body and end cap two parts, respectively using stamping and numerical control lathe process to process, greatly reduce the processing difficulty and processing cost, and the base is not only can enhance the stability when inflating, maintain gas stable delivery, but also fully consider the characteristics of universal testing machine shaft pressure experimental condition, without other installation steps can be carried out shaft pressure experiment, simplify operation steps.

Description

Technical Field

[0001] This invention relates to the field of inflatable anti-instability rod technology, specifically a thin-walled metal inflatable rod device. Background Technology

[0002] Thin-walled structures possess a high stiffness-to-mass ratio, enabling lightweight design while meeting structural stiffness requirements. These structures are widely used in engineering fields. Lightweight structural design technology is a crucial means to improve the performance of aerospace equipment. The structural mass coefficient is a key indicator for evaluating the level of lightweight design and directly affects the design outcome. Under the constraint of the structural mass coefficient, aircraft structures increasingly adopt thin-walled structures that are both highly stiff and lightweight.

[0003] As a type of inflatable membrane structure, the inflatable rod structure utilizes the stable air pressure inside the membrane to apply prestress to the membrane material. It can achieve a large structural load-bearing capacity with relatively little material. As the basic load-bearing unit of space inflatable structures, it is widely used in the aerospace field due to its advantages such as light weight, certain support strength, small folded volume, fast forming, and high deployment reliability. Currently, most inflatable rod structures use non-metallic materials, but due to the limitation of material strength, the pressure-bearing capacity of inflatable rod structures made of such materials is very low. There is a lack of thin-walled metal inflatable rods in the existing technology, and traditional inflatable rods are one-piece structures. It is difficult to process thin-walled metal inflatable rods. Therefore, this invention proposes a thin-walled metal inflatable rod device. Summary of the Invention

[0004] The purpose of this invention is to provide a thin-walled metal inflatable rod device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a thin-walled metal inflatable rod device, applied in the field of aircraft structural component production, comprising a thin-walled metal rod body, wherein the top end of the thin-walled metal rod body is closed and the bottom end is open, and an end cap is coaxially mounted on the bottom end of the thin-walled metal rod body, and an inflatable guide rod is coaxially mounted at the center of the end cap, and the inflatable guide rod passes through the end cap and communicates with the thin-walled metal rod body;

[0006] A base is coaxially mounted below the end cap. The top of the base has a groove that matches the end cap. The middle of the groove has a through hole that matches the inflation guide rod. During inflation or axial pressure tests, the end cap will be embedded in the groove and the inflation guide rod will be installed through the through hole.

[0007] The outer surface of the inflatable guide rod is provided with external threads, and square grooves are provided on both sides of the bottom of the base.

[0008] Furthermore, the top of the end cap is provided with a groove that is adapted to the thin-walled metal rod.

[0009] Furthermore, the thin-walled metal rod body has an open end that is connected and sealed to the groove two by adhesive bonding or welding.

[0010] Furthermore, the cross-sectional shape of the thin-walled metal rod is set to be circular, and the wall thickness of the thin-walled metal rod is less than 1 mm.

[0011] Furthermore, both the end cap and the base are made of Q235 steel.

[0012] Furthermore, the cross-sectional shape of the end cap is set to be circular, square, or polygonal.

[0013] Furthermore, the cross-sectional shape of the inflatable guide rod is set to be circular.

[0014] Furthermore, the inflation guide rod is connected to the air compressor's connector threaded through an external thread, and the air compressor's connector has an internal thread that matches the external thread.

[0015] This invention has at least the following beneficial effects:

[0016] (1) The thin-walled metal inflatable rod proposed in this invention adopts a split design, which divides the structure of the thin-walled metal inflatable rod into two parts: the thin-walled metal rod body and the end cap. The two parts are processed by stamping and CNC turning, respectively, which greatly reduces the processing difficulty and processing cost.

[0017] (2) The base of the present invention has a through hole in the center area for passing the inflation guide rod. Two square slots are opened on both sides of the base for exporting the air compressor rod. This not only enhances the stability during inflation and maintains stable gas delivery, but also fully considers the characteristics of the axial pressure test of the universal testing machine. The axial pressure test can be carried out without any other installation steps, simplifying the operation steps.

[0018] (3) The present invention can ensure the coaxiality between the thin-walled metal rod body, the end cap and the base by setting groove one and groove two.

[0019] (4) The present invention has threads machined on the inflation guide rod for connection with the male end of the air compressor quick connector, and the internal space of the base is sufficient to accommodate the inflation guide rod, the male and female ends of the air compressor quick connector and the air compressor rod, which fully considers the usage method of the air compressor.

[0020] (5) The overall structure of the present invention is simple, which reduces the implementation cost of thin-walled metal inflatable rod experiments.

[0021] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of the overall structural connection state of the present invention;

[0023] Figure 2 This is a three-dimensional schematic diagram of the thin-walled metal rod body in this invention;

[0024] Figure 3 This is a three-dimensional schematic diagram of the end cap in this invention;

[0025] Figure 4 This is a three-dimensional schematic diagram of the base in this invention.

[0026] Figure label:

[0027] 1. Thin-walled metal rod body; 11. Opening; 2. End cap; 21. Groove II; 22. Inflatable guide rod; 23. External thread; 3. Base; 31. Groove I; 32. Through hole; 33. Square slot. Detailed Implementation

[0028] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0029] Please see Figures 1-4 The present invention provides a technical solution: a thin-walled metal inflatable rod device, applied in the field of aircraft structural component production, including a thin-walled metal rod body 1, the top end of the thin-walled metal rod body 1 is closed, the bottom end is provided with an opening 11, and an end cap 2 is coaxially installed at the bottom end of the thin-walled metal rod body 1. An inflatable guide rod 22 is coaxially installed at the center of the end cap 2, and the inflatable guide rod 22 passes through the end cap 2 and communicates with the thin-walled metal rod body 1.

[0030] A base 3 is coaxially mounted below the end cap 2. The top of the base 3 has a groove 31 that matches the end cap 2. The middle of the groove 31 has a through hole 32 that matches the inflation guide rod 22. During inflation or axial pressure tests, the end cap 2 will be embedded in the groove 31 and the inflation guide rod 22 will be installed through the through hole 32.

[0031] The outer surface of the inflatable guide rod 22 is provided with external threads 23, and square grooves 33 are provided on both sides of the bottom of the base 3.

[0032] Regarding the technical solution of this embodiment, the top of the end cap 2 is provided with a groove 21 that is adapted to the thin-walled metal rod body 1. The thin-walled metal rod body 1 has an opening 11 and is connected and sealed to the groove 21 by adhesive bonding or welding to form a thin-walled metal inflatable rod as a whole.

[0033] It should be noted that traditional inflatable rods are generally made of non-metallic materials and are all one-piece designs. When manufacturing a thin-walled metal inflatable rod as a whole, the thin-walled metal rod body 1 is relatively thin, so it is inconvenient to use the traditional structure for production and processing. Therefore, this embodiment adopts a split design for the thin-walled metal inflatable rod. In actual manufacturing, the thin-walled metal rod body 1 is first stamped using stamping technology, and then the end cap 2 is manufactured using CNC technology. Then the two are connected to form a whole. This method can greatly reduce the processing difficulty and processing cost.

[0034] Furthermore, such as Figure 2 As shown, the cross-sectional shape of the thin-walled metal rod 1 is set to be circular, and the wall thickness of the thin-walled metal rod 1 is less than 1 mm.

[0035] The cross-sectional shape of the end cap 2 can be set to a circle, a square, or a polygon. For the technical solution of this embodiment, the cross-sectional shape of the end cap 2 is set to a circle, such as... Figure 3 As shown, the circular end cap 2 is convenient for production. It should be noted that no matter what shape the end cap 2 is, the groove 31 always fits the end cap 2, and when the end cap 2 is inserted into the groove 31, the top plane of the end cap 2 is higher than the top plane of the base 3.

[0036] like Figure 3 As shown, the cross-sectional shape of the inflation guide rod 22 is set to be circular. The inflation guide rod 22 is connected to the connector of the air compressor through the external thread 23. The connector of the air compressor (not shown in the figure) is provided with an internal thread that matches the external thread 23. In use, the air compressor can be used to inflate the inflation guide rod 22 and the gas can be transported to the thin-walled metal rod body 1 through the inflation guide rod 22.

[0037] Regarding the technical solution of this embodiment, such as Figure 4 As shown, there are two square slots 33, which are symmetrically arranged. The bottom of the square slots 33 is open 11, which facilitates the discharge of the air compressor rod. In use, the groove 31 on the base 3 cooperates with the end cap 2. The internal space of the base 3 is sufficient to accommodate the inflation guide rod 22, the male and female quick connectors of the air compressor, and the air compressor rod. This facilitates the overall stability of the thin-walled metal inflation rod during inflation, maintains uniform gas delivery, and avoids pressure changes.

[0038] Furthermore, after the thin-walled metal inflatable rod is fabricated as a whole, it is necessary to use an external testing machine to conduct a structural critical load determination experiment under axial compression. During the test, the thin-walled metal inflatable rod is placed on the base 3, and then the base 3 and the thin-walled metal inflatable rod are placed directly between the upper and lower pressure heads of the testing machine. No other installation operations are required to maintain the placement stability of the thin-walled metal inflatable rod. The operation is simple, convenient and practical.

[0039] It should be noted that both end cap 2 and base 3 are made of Q235 steel to ensure overall rigidity and improve service life.

[0040] In summary, the thin-walled metal inflatable rod proposed in this invention adopts a split design, dividing the structure into two parts: a thin-walled metal rod body 1 and an end cap 2. These parts are processed using stamping and CNC turning processes, respectively, which greatly reduces the processing difficulty and cost. Furthermore, the base 3 not only enhances the stability during inflation and maintains stable gas delivery, but also fully considers the characteristics of the axial compression test conditions of the universal testing machine, allowing for axial compression tests to be performed without additional installation steps, thus simplifying the operation process.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances. When an element is referred to as being "assembled on," "mounted on," "fixed to," or "set on" another element, it may be directly on the other element or there may be an intermediate element present. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0044] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A thin-walled metal inflatable rod device, applied to the field of aircraft structure production, comprising a thin-walled metal rod body (1), characterized in that, The top end of the thin-walled metal rod (1) is closed, and the bottom end is open (11). An end cap (2) is coaxially installed at the bottom end of the thin-walled metal rod (1). An inflation guide rod (22) is coaxially installed at the center of the end cap (2). The inflation guide rod (22) passes through the end cap (2) and is interconnected with the thin-walled metal rod (1). A base (3) is coaxially mounted below the end cap (2). The top of the base (3) has a groove (31) that matches the end cap (2). The middle of the groove (31) has a through hole (32) that matches the inflation guide rod (22). During inflation or axial pressure tests, the end cap (2) will be embedded in the groove (31) and the inflation guide rod (22) will be installed through the through hole (32). The outer surface of the inflatable guide rod (22) is provided with an external thread (23), and square grooves (33) are provided on both sides of the bottom of the base (3); The top of the end cap (2) is provided with a groove 21 that is adapted to the thin-walled metal rod body (1); The thin-walled metal rod body (1) has an opening (11) at one end and a groove (21) at the other end, which are connected and sealed by adhesive bonding or welding. Both the end cap (2) and the base (3) are made of Q235 steel; The inflation guide rod (22) is connected to the air compressor connector threaded through the external thread (23), and the air compressor connector is provided with an internal thread that is compatible with the external thread (23); The thin-walled metal inflatable rod is designed as a split unit. The thin-walled metal rod body (1) is processed by stamping, and the end cap (2) is processed by CNC turning.

2. The thin-walled metal inflatable rod device according to claim 1, characterized in that: The cross-sectional shape of the thin-walled metal rod (1) is set to be circular, and the wall thickness of the thin-walled metal rod (1) is less than 1 mm.

3. The thin-walled metal inflatable rod device according to claim 2, characterized in that: The cross-sectional shape of the end cap (2) is set to be circular, square or polygonal.

4. The thin-walled metal inflatable rod device according to claim 3, characterized in that: The cross-sectional shape of the inflatable guide rod (22) is set to be circular.

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