Thin-wall metal inflation rod device

Abstract

The invention discloses a thin-wall metal inflation rod device, and relates to the technical field of inflation anti-instability rods. The device comprises a thin-wall metal rod body, the top end of the thin-wall metal rod body is closed, the bottom end of the thin-wall metal rod body is provided with an opening, the bottom end of the thin-wall metal rod body is coaxially provided with an end cover, the center position of the end cover is coaxially provided with an inflation guide rod, and the inflation guide rod penetrates through the end cover and is communicated with the thin-wall metal rod body; and a base is coaxially mounted below the end cover. According to the thin-wall metal inflation rod, the whole thin-wall metal inflation rod is designed in a split mode, the thin-wall metal inflation rod is structurally divided into the thin-wall metal rod body and the end cover, the thin-wall metal rod body and the end cover are machined through stamping and numerical control turning processes respectively, the machining difficulty and the machining cost are greatly reduced, the arranged base can enhance the stability during inflation, and the machining efficiency is improved. And moreover, the characteristics of the axial pressure experiment working condition of the universal testing machine are fully considered, the axial pressure experiment can be carried out without other mounting steps, and the operation steps are simplified.

Description

Technical Field

[0001] The invention relates to the technical field of inflatable anti-instability rods, in particular to a thin-walled metal inflatable rod device. Background Art

[0002] Thin-walled structures have the characteristics of high stiffness-to-mass ratio. When the structural stiffness requirements are met, lightweight design can be achieved. Such structures are widely used in the engineering field. In order to improve the performance of aerospace equipment, structural lightweight design technology is an important means to achieve this. Among them, the structural mass coefficient is an important indicator for evaluating the level of lightweight design, which directly affects the design effect of the scheme. Under the constraints of the structural mass coefficient, the aircraft structure is more likely to be presented as a thin-walled structure with high stiffness and light weight.

[0003] As a kind of inflatable membrane structure, the inflatable rod structure utilizes the stable air pressure in the membrane to apply prestress to the membrane material, and can obtain a larger structural bearing capacity with relatively less material. As the basic load-bearing unit of the space inflatable structure, it is widely used in the aerospace field because of its light weight, certain supporting strength, small volume after folding, fast forming and high deployment reliability. At present, the inflatable rod structure mostly adopts non-metallic materials, but due to the limitation of material strength, the pressure-bearing capacity of the inflatable rod structure made of such materials is very low. The prior art lacks metal inflatable rods with thin-walled structures, and the traditional inflatable rods are an integrated structure. The metal inflatable rods with thin-walled structures are difficult to process. Therefore, the present invention proposes a thin-walled metal inflatable rod device. Summary of the invention

[0004] The object of the present invention is to provide a thin-walled metal inflatable rod device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a thin-walled metal inflatable rod device, applied to the field of aircraft structural parts production, comprising a thin-walled metal rod body, the top end of the thin-walled metal rod body is closed, the bottom end is provided with an opening, and an end cap is coaxially mounted on the bottom end of the thin-walled metal rod body, an inflatable guide rod is coaxially mounted at the center position of the end cap, and the inflatable guide rod penetrates the end cap and is mutually connected with the thin-walled metal rod body;

[0006] A base is coaxially installed below the end cover, a groove 1 adapted to the end cover is provided on the top of the base, a through hole adapted to the inflation guide rod is provided in the middle of the groove 1, and during inflation or axial pressure test, the end cover will be embedded in the groove 1 and the inflation guide rod will be arranged through the through hole;

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

[0008] Furthermore, a second groove matching the thin-walled metal rod body is formed on the top of the end cover.

[0009] Furthermore, the thin-walled metal shaft has an open end which is connected and sealed to the groove 2 by gluing or welding.

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

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

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

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

[0014] Furthermore, the inflation guide rod is threadably connected to a joint of the air compressor via an external thread, and the joint of the air compressor is provided with an internal thread matching the external thread.

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

[0016] (1) The thin-walled metal inflatable rod proposed in the present invention adopts a split design as a whole, and the thin-walled metal inflatable rod structure is divided into two parts: a thin-walled metal rod body and an end cap, which are processed by stamping and CNC lathe respectively, greatly reducing the processing difficulty and processing cost.

[0017] (2) A through hole is reserved in the central area of ​​the base provided in the present invention for passing the inflation guide rod, and two square grooves are provided on both sides of the base for guiding out the air rod of the air compressor. This not only enhances the stability during inflation and maintains stable gas delivery, but also fully considers the characteristics of the axial pressure test conditions of the universal testing machine. The axial pressure test can be carried out without the need for other installation steps, thereby simplifying the operation steps.

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

[0019] (4) The present invention processes threads on the inflation guide rod for connection with the male head 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 heads of the air compressor quick connector and the air compressor air rod, which fully considers the use of the air compressor.

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

[0021] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0023] Figure 2 is a three-dimensional schematic diagram of a thin-walled metal shaft in the present invention;

[0024] Figure 3 is a three-dimensional schematic diagram of the end cover in the present invention;

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

[0026] Reference numerals:

[0027] 1. Thin-walled metal rod body; 11. Opening; 2. End cover; 21. Groove 2; 22. Inflatable guide rod; 23. External thread; 3. Base; 31. Groove 1; 32. Through hole; 33. Square groove. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0029] See also Figure 1-Figure 4 The present invention provides a technical solution: a thin-walled metal inflatable rod device, which is applied to the field of aircraft structural parts production, comprises 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 the bottom end of the thin-walled metal rod body 1 is coaxially mounted with an end cover 2, the center position of the end cover 2 is coaxially mounted with an inflatable guide rod 22, and the inflatable guide rod 22 penetrates the end cover 2 and is mutually connected with the thin-walled metal rod body 1;

[0030] A base 3 is coaxially mounted below the end cover 2. A groove 31 matching the end cover 2 is provided on the top of the base 3. A through hole 32 matching the inflation guide rod 22 is provided in the middle of the groove 31. During inflation or axial pressure tests, the end cover 2 will be embedded in the groove 31 and the inflation guide rod 22 will be arranged through the through hole 32.

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

[0032] According to the technical solution of this embodiment, a groove 21 matching the thin-walled metal rod body 1 is provided on the top of the end cover 2. The thin-walled metal rod body 1 has an opening 11 at one end which is connected and sealed to the groove 21 by gluing or welding to form a thin-walled metal inflatable rod as a whole.

[0033] It should be noted that conventional inflatable rods are generally made of non-metallic materials and are all of an integrated design. When a thin-walled metal inflatable rod is prepared as a whole, since the thin-walled metal rod shaft 1 is relatively thin, it is not convenient to produce and process it using a conventional structure. Therefore, this embodiment uses a split design for the thin-walled metal inflatable rod as a whole. During actual preparation, the thin-walled metal rod shaft 1 is first stamped using stamping technology, and then the end cap 2 is prepared using CNC technology, and then the two are connected to form a whole. This method can greatly reduce the difficulty and cost of processing.

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

[0035] The cross-sectional shape of the end cap 2 can be set to be circular, square or polygonal. For the technical solution of this embodiment, the cross-sectional shape of the end cap 2 is set to be circular. Figure 3 As shown, a circular end cap 2 is used to facilitate production and preparation. It should be noted that no matter what shape the end cap 2 adopts, the groove 31 is always adapted to 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, and the inflation guide rod 22 is threadedly connected to the joint of the air compressor through an external thread 23, and the joint of the air compressor (not shown in the figure) is provided with an internal thread that matches the external thread 23. When in use, the air compressor can be used to inflate the inflation guide rod 22, and the gas is transported to the thin-walled metal rod body 1 through the inflation guide rod 22.

[0037] For the technical solution of this embodiment, Figure 4 As shown, there are two square grooves 33, which are symmetrically arranged, and the bottom end of the square groove 33 is in the shape of an opening 11, which is convenient for leading out the air compressor gas rod, and when in use, the groove 31 on the base 3 cooperates with the end cover 2, and the internal space of the base 3 is sufficient to accommodate the inflation guide rod 22, the male and female heads of the air compressor quick connector and the air compressor gas rod, which is convenient for enhancing the overall stability of the thin-walled metal inflation rod during inflation, maintaining uniform gas delivery, and avoiding air pressure changes;

[0038] After the thin-walled metal inflatable rod is prepared as a whole, it is necessary to use an external testing machine to carry out an experiment to determine the critical load of the structure under axial compression. During the test, the thin-walled metal inflatable rod is placed as a whole on the base 3, and then the base 3 and the thin-walled metal inflatable rod are directly placed 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 as a whole. The operation is simple, convenient and practical.

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

[0040] To sum up, the thin-walled metal inflatable rod proposed in the present invention adopts a split design as a whole, and the thin-walled metal inflatable rod structure is divided into two parts: a thin-walled metal rod body 1 and an end cover 2, which are processed by stamping and CNC lathe processes respectively, which greatly reduces the processing difficulty and processing cost. The provided base 3 can not only enhance the stability during inflation and maintain stable gas delivery, but also fully consider the characteristics of the axial compression test conditions of the universal testing machine. The axial compression test can be carried out without the need for other installation steps, thereby simplifying the operating steps.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0042] For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. When an element is referred to as being "assembled on", "installed on", "fixed on" or "set on" another element, it can be directly on the other element or there can also be a centered element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a centered element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes and are not intended to be the only implementation method.

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

[0044] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A thin-walled metal inflatable rod device, used in the field of aircraft structural parts production, comprising a thin-walled metal rod body (1), characterized in that: The top end of the thin-walled metal rod (1) is closed, the bottom end is provided with an opening (11), and the bottom end of the thin-walled metal rod (1) is coaxially mounted with an end cover (2), the center position of the end cover (2) is coaxially mounted with an inflation guide rod (22), and the inflation guide rod (22) penetrates the end cover (2) and is mutually connected with the thin-walled metal rod (1); A base (3) is coaxially mounted below the end cover (2); a groove (31) matching the end cover (2) is provided at the top of the base (3); a through hole (32) matching the inflation guide rod (22) is provided in the middle of the groove (31); during inflation or axial pressure testing, the end cover (2) will be embedded in the groove (31) and the inflation guide rod (22) will be arranged through the through hole (32); The outer surface of the inflation guide rod (22) is provided with an external thread (23), and both sides of the bottom of the base (3) are provided with square grooves (33).

2. A thin-walled metal inflatable rod device according to claim 1, characterized in that: A second groove (21) adapted to the thin-walled metal rod body (1) is formed on the top of the end cover (2).

3. A thin-walled metal inflatable rod device according to claim 2, characterized in that: The thin-walled metal rod body (1) has an opening (11) at one end and is connected and sealed to the second groove (21) by means of gluing or welding.

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

5. A thin-walled metal inflatable rod device according to claim 4, characterized in that: The end cover (2) and the base (3) are both made of Q235 steel.

6. A thin-walled metal inflatable rod device according to claim 5, characterized in that: The cross-sectional shape of the end cover (2) is set to be circular, square or polygonal.

7. A thin-walled metal inflatable rod device according to claim 5, characterized in that: The cross-sectional shape of the inflation guide rod (22) is set to be circular.

8. A thin-walled metal inflatable rod device according to claim 7, characterized in that: The inflation guide rod (22) is threadedly connected to a joint of an air compressor via an external thread (23), and the joint of the air compressor is provided with an internal thread matched with the external thread (23).

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