CN112291963B - Composite material box for flight platform external-hanging electronic equipment - Google Patents
Composite material box for flight platform external-hanging electronic equipment Download PDFInfo
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- CN112291963B CN112291963B CN202011129634.9A CN202011129634A CN112291963B CN 112291963 B CN112291963 B CN 112291963B CN 202011129634 A CN202011129634 A CN 202011129634A CN 112291963 B CN112291963 B CN 112291963B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0217—Mechanical details of casings
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
Abstract
The invention relates to the technical field of electronic equipment cases, in particular to a composite material case for a flight platform plug-in electronic equipment. The box includes that both ends have the open chamber that holds, and the wall body that forms to hold the chamber is combined material, and it has two relative hanging parts that set up and connects two supporting parts of two hanging parts, and wherein, hanging part is solid shop's layer, and the supporting part is sandwich structure, and the interior covering and the outer covering of wall body are continuous logical long shop's layer, and the outside of hanging part is equipped with the connecting portion of hanging, and hanging part and supporting part all can set up electronic equipment's mounting hole, the mounting hole with hang connecting portion all with wall body integrated into one piece. The wall body of the box body is made of composite materials and adopts a mixed form of a sandwich structure and a solid layer, and the inner skin and the outer skin of each part of the wall body are connected through long layers, so that the box body is good in integrity, free of mechanical fastening connection, light in weight, high in strength and capable of bearing large impact overload.
Description
Technical Field
The invention relates to the technical field of electronic equipment cases, in particular to a composite material case for a flight platform plug-in electronic equipment.
Background
High-altitude flight platforms such as unmanned aerial vehicles, airships and the like can reside in the atmosphere for a long time, and carry various electronic equipment such as antennas and the like so as to meet the task requirements of detection, communication and the like. The electronic equipment capable of being externally hung is one of important ways for improving the effective task load and reducing the use cost.
The external electronic equipment is used for bearing concentrated force by the case box, and has larger impact load in the use process.
The existing chassis box is mostly made of metal materials, and has a large weight; the inner surface of the case box with a smaller inner cavity is difficult to process, and only the structural form of respectively processing panels and then assembling can be adopted, so that the integrity is poor, and the use reliability is poor.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide a composite material box body for a flight platform external electronic device, which at least solves one problem in the background art.
(II) technical scheme
In order to achieve the purpose, the invention provides a composite material box body for an external electronic device of a flight platform, which comprises a containing cavity with openings at two ends, wherein a wall body forming the containing cavity is made of composite materials and is provided with two hanging parts arranged oppositely and two supporting parts connecting the two hanging parts, the hanging parts are solid layers, the supporting parts are of a sandwich structure, inner skins and outer skins of the wall body are continuous long-through layers, hanging connecting parts are arranged on the outer sides of the hanging parts, mounting holes of the electronic device can be formed in the hanging parts and the supporting parts, and the mounting holes and the hanging connecting parts are integrally formed with the wall body.
Preferably, the core layer of the sandwich structure is a foam core layer, the foam core layer comprises a corrugated reinforcing layer, the corrugated reinforcing layer is positioned between the outer skin and the inner skin, the space between the inner skin and the outer skin is divided into a plurality of filling cavities, and the filling cavities are filled with foam core blocks.
Preferably, at least part of the filling cavity is provided with a reinforcing ring layer, the reinforcing ring layer divides the foam core block in the filling cavity into a plurality of blocks, the number of the reinforcing ring layers is the same as that of the blocks divided by the foam core block, and each reinforcing ring layer covers one divided block.
Preferably, the hanging connecting part and the wall body are connected into a whole through the inserting layer; and/or
The proportion of the inserting layers accounts for 0.25-0.35 of the total layers.
Preferably, the two hanging parts are arranged in parallel at intervals, and the two supporting parts are respectively arranged perpendicular to the two hanging parts.
Preferably, a reinforcing block is arranged at the mounting hole of the support part, and the reinforcing block is positioned between the outer skin and the inner skin; and/or
The hole edge distance of the reinforcing block is at least 2.5 times of the hole diameter of the mounting hole, the size of the reinforcing block in the axial direction of the mounting hole is 100-105% of the theoretical size, the reinforcing block is formed by pressing chopped fiber premix, and the fiber volume content is 45-55%.
Preferably, a cover mounting edge is arranged at the inner side edge of the wall body, and a region corresponding to the cover mounting edge is wound by 0-degree fibers between the inner skin and the outer skin, so that the region is thickened;
the end part of the wall body is provided with a cover connecting hole, and a steel wire thread sleeve is adopted at the cover connecting hole.
Preferably, the outer skin and the inner skin are both formed by mixing and laying unidirectional fibers and fabrics, the inner surface and the outer surface of the outer skin and the inner skin are made of fabrics, and the fiber directions are straight.
Preferably, the outermost layer of the outer skin is laid by adopting a metal net with the surface resistance of not more than 5m omega/square meter.
Preferably, the filling cavity has a trapezoidal cross section;
in each filling cavity with the reinforcing ring layers, the sections of the reinforcing ring layers positioned on the two sides are parallelogram, and the section of the reinforcing ring layer between the two sides is trapezoid; and/or
The corrugated reinforcing layer adopts a fabric layer;
the reinforcing ring layer adopts fiber 0-degree direction laying.
(III) advantageous effects
The technical scheme of the invention has the following advantages:
1. according to the composite material box body for the external electronic equipment of the flight platform, provided by the invention, the wall body of the box body is made of composite materials and adopts a mixed form of a sandwich structure and a solid layer, and the inner skin and the outer skin of each part of the wall body are connected through long layers, so that the box body is good in integrity, free of mechanical fastening connection, light in weight, high in strength and capable of bearing larger impact overload.
2. The sandwich layer of the sandwich structure is a foam sandwich layer, the foam sandwich layer comprises a corrugated reinforcing layer, the corrugated reinforcing layer is positioned between an outer skin and an inner skin, a plurality of filling cavities are separated from the space between the inner skin and the outer skin, and the filling cavities are filled with foam core blocks. The sandwich structure adopted in the embodiment enables the overall mass of the box body to be relatively small, has good overall rigidity, has certain vibration-proof and energy-absorbing capabilities, and enhances the modulus in the supporting part and between layers.
3. And a reinforcing ring layer is also arranged in part of the filling cavity and divides the foam core block in the filling cavity into a plurality of block bodies, and a reinforcing ring layer is correspondingly coated on the outer side of each divided block body, so that the modulus of the foam core block is further improved, and the structural strength of the box body is improved.
4. Hang between connecting portion and the wall body and spread the layer through inserting and connect as an organic wholely, spread the layer scheme that covers and concentrate stress point to insert and spread the combination through the plane and improve the wholeness of box.
5. The outer skin adopts a layer laying scheme of a surface metal mesh, so that the electromagnetic shielding effect is realized.
Drawings
The drawings of the present invention are provided for illustrative purposes only, and the proportion and the number of the components in the drawings do not necessarily correspond to those of an actual product.
FIG. 1 is a schematic structural diagram of a composite material box for a flight platform plug-in electronic device according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a support portion according to an embodiment of the present invention;
FIG. 3 is an enlarged schematic view of section A of FIG. 2;
FIG. 4 is a schematic view of the connection between the hanging connection portion and the wall plugging layer according to the embodiment of the present invention.
In the figure: 1: a wall body; 11: a hanging part; 12: a support portion; 13: mounting holes; 14: a flap mounting edge; 15: the flap is connected to the hole.
2: an accommodating chamber; 3: hanging the connecting part; 4: an inner skin; 5: an outer skin; 6: a corrugated reinforcing layer; 7: a foam core block; 8: a reinforcing ring layer;
100: laying layers at the hanging part; 200: inserting a layer; 300: hanging the connecting part and paving the layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it should be noted that the term "thickness" refers to the dimension in the inner skin-to-outer skin direction or the outer skin-to-inner skin direction.
Referring to fig. 1, in the composite material box for the mobile platform plug-in electronic device according to the embodiment of the present invention, a wall body 1 is circumferentially closed to form a receiving cavity 2 with openings at two ends, the wall body 1 is made of a composite material and has two hanging portions 11 oppositely disposed and two supporting portions 12 connecting the two hanging portions 11, wherein the hanging portions 11 are solid layers, the supporting portions 12 are sandwich layers, an inner skin 4 and an outer skin 5 of the wall body 1 are both continuous long layers, a hanging connection portion 3 is disposed on an outer side of the hanging portion 11, mounting holes 13 of the electronic device can be disposed on both the hanging portions 11 and the supporting portions 12, and the mounting holes 13 and the hanging connection portion 3 are integrally formed with the wall body 1.
During the use, flight platform is external for electronic equipment combined material box accessible hang in flight platforms such as unmanned aerial vehicle, dirigible in connecting portion 3, and external electronic equipment passes through mounting hole 13 and installs in holding chamber 2, can hold chamber 2 both ends or wherein one end installation flap as required. The wall body 1 of the composite material box body for the flight platform external electronic equipment is made of composite materials and adopts a mixed form of a sandwich structure and a solid laying layer, and the inner skin 4 and the outer skin 5 of each part of the wall body 1 are connected through long laying layers, so that the composite material box body is good in integrity, free of mechanical fastening connection, light in weight, high in strength and capable of bearing large impact overload. And because it does not need to adopt machining, even the minor holding chamber can also make.
In some preferred embodiments, as shown in fig. 2 and 3, the core layer of the sandwich structure is a foam core layer, which includes a corrugated reinforcement layer 6, which corrugated reinforcement layer 6 is located between the outer skin 5 and the inner skin 4, dividing the space between the inner skin 4 and the outer skin 5 into a plurality of filling cavities, which are filled with foam pellets 7. The sandwich structure adopted in the embodiment enables the overall mass of the box body to be relatively small, has good overall rigidity, has certain vibration-proof and energy-absorbing capabilities, and enhances the modulus in the surface and between layers of the supporting part 12.
In order to further improve the impact resistance of the box bodyIn some preferred embodiments, as shown in fig. 2 and fig. 3, at least part of the filling cavity is provided with a reinforcing ring layer 8, the reinforcing ring layer 8 divides the foam core 7 in the filling cavity into a plurality of blocks, the number of the reinforcing ring layers 8 is the same as that of the divided foam core 7, each reinforcing ring layer 8 covers one block of the divided foam core 7, namely, the modulus of the foam core is further improved by matching the reinforcing ring layer 8 with a corrugated reinforcing layer, and the density of the supporting part 12 can be smaller than 1g/cm while bearing large impact overload3. Preferably, the thickness of the foam core 7 is between 110% and 115% of the theoretical size. The thickness of the corrugated reinforcing layer 6 and the reinforcing ring layer 8 is 0.2-0.5 mm, and the thickness of the outer skin 5 and the inner skin 4 is 0.5-1 mm.
It should be noted that, during the laying, each reinforcing ring layer 8 is laid separately, and a corresponding part of the foam core blocks 7 is wrapped therein, and after the curing and forming, the adjacent sides of the adjacent reinforcing ring layers 8 are formed into a whole, and structurally, the adjacent reinforcing ring layers 8 share a side wall.
In a preferred embodiment, the hanging connection part 3 and the wall body 1 are connected into a whole through an insertion layer, as shown in fig. 4, the insertion layer 200 is inserted and paved with the hanging part paving layer 100 and the hanging connection part paving layer 300, the insertion layer 200 is folded when being paved and forms a part of the hanging connection part 3 and the wall body 1, the stress of the hanging connection part 3 can be transmitted to the wall body 1 of the composite material box body through the continuous fiber of the insertion layer, and the integrity of the box body is improved through a paving scheme combining plane paving and concentrated stress point inserting paving. Preferably, the proportion of the inserting layers accounts for 0.25-0.35 of the total layers.
In fig. 4, only a part of the paving layers are shown in fig. 4 for more clearly showing a plug-in paving manner, and the specific number of paving layers may be as many as needed, which is not limited herein.
In order to increase the structural strength at the installation of the electronic device, in some preferred embodiments, reinforcing blocks are provided at the installation holes 13 provided at the support portions 12, the reinforcing blocks being located between the outer skin 5 and the inner skin 4, i.e., being provided at the sandwich structure. Preferably, the hole margin of the reinforcing block is not less than 2.5 times the hole diameter of the mounting hole 13, and the dimension in the axial direction of the mounting hole 13 is 100% to 105% of the theoretical dimension. Preferably, the reinforcing block is formed by pressing chopped fiber premix with the length of 10-20 mm, and the fiber volume content is 45-55%.
The installation of setting in hanging part 11 department also 13 can set up the steel wire swivel nut and increase structural strength, has overcome the weak shortcoming of performance between the combined material layer, can provide two kinds of connection interfaces of through-hole and screw hole.
In order to increase the circumferential strength of the box body, particularly the structural strength of the flap mounting part, in some preferred embodiments, a flap mounting edge 14 is arranged at the inner side edge of the wall body 1, and a region corresponding to the flap mounting edge 14 is wound by 0-degree fibers between the inner skin 4 and the outer skin 5, so that the region is thickened, the circumferential strength of the box body is improved, and the integrity of the supporting part 12 and the hanging part 11 is further improved. Preferably, a flap attachment hole 15 is provided at an end of the wall 1 for attachment of the flap to the case. For increased strength, a wire thread insert is preferably provided in the flap attachment hole 15.
In the embodiment with the flap mounting side 14, the reinforcing coil layer 8 and the fibers in the area corresponding to the flap mounting side 14 are wound and matched to realize the full fiber coating of part of the foam core blocks 7, so that the modulus of the foam core blocks can be further improved, and the structural strength of the box body can be improved.
In a preferred embodiment, the outer skin 5 and the inner skin 4 are both formed by a unidirectional fiber and fabric mixed layer, the inner and outer surfaces of the outer skin and the outer skin are formed by fabrics, the fiber direction is straight, and the proportion is more than 50%. In one specific embodiment, the outer skin 5 and the inner skin 4 both adopt unidirectional fiber and fabric mixed plies [ (0,90),0 ]2(0,90)]The fiber direction is straight.
In order to provide the box body with an electromagnetic shielding effect, in some preferred embodiments, the outermost layer of the outer skin 5 is made of a metal mesh with surface resistance not greater than 5m Ω/square meter.
In some preferred embodiments, the two hanging parts 11 are spaced apart and arranged in parallel, and the two supporting parts 12 are respectively arranged perpendicular to the two hanging parts 11, i.e. the cross section of the box body is rectangular, in one specific embodiment, the outer dimension of the box body is 250mm × 200mm × 125mm, the thickness of the supporting parts is 12mm, and the thickness of the hanging parts 11 is 2 mm. The supporting part 12 is a composite corrugated foam sandwich structure, and the sandwich structure comprises a corrugated reinforcing layer 6, a foam core block 7 and a reinforcing ring layer 8. The section of the filling cavity is trapezoidal, the base angle of the trapezoid is 45 degrees to 60 degrees, three reinforcing ring layers 8 are arranged in the filling cavity with the reinforcing ring layers 8, each reinforcing ring layer 8 comprises a block body formed by separating the foam core blocks 7, the sections of the reinforcing ring layers 8 on the two sides are parallelogram, the section of the reinforcing ring layer 8 in the middle is trapezoidal, and the base angle is 45 degrees to 60 degrees. The corrugated reinforcing layer 6 adopts two layers of plain weave fabric laying layers, and the thickness is 0.4 mm. The reinforcing ring layer 8 is formed by laying fibers in the direction of 0 degree, the thickness is 0.25mm, the thickness of the foam core block 7 is 11mm, and the thickness of the outer skin 5 and the inner skin 4 is 0.65 mm.
The hanging connecting part 3 is of a corner box structure, the wall thickness is 3mm, and plain weave fabric prepreg is adopted for laying. The cover mounting edges 14 are positioned at the edges of two ends of the box body, and the cover connecting holes 15 adopt steel wire thread sleeves to provide a threaded interface of M3.
The hanging part 12 has a rib structure.
The two supporting parts 12 are provided with eight mounting holes 13 of electronic equipment with phi 4.5mm and 90-degree countersunk heads, and the positions of the mounting holes are reinforced by equipment mounting countersunk hole reinforcing blocks. The reinforcing block is 30mm multiplied by 30mm, the size in the thickness direction is 12.2mm, the reinforcing block is formed by pressing short carbon fiber premix with the length of 15mm, and the fiber volume content is 50%.
It should be noted that, in fig. 2-4, which are schematic diagrams provided for embodying the structure of each part of the box body, even if the adjacent plies of different parts are integrally formed (without obvious boundary contour) after the curing and forming, for example, the contact part of the corrugated reinforcing layer 6 and the reinforcing ring layer 8 with the inner skin 4 and the outer skin 5, the contact part between each ply of the hanging connection part 3 and the contact part between the hanging connection part 3 and the connected skin, and those skilled in the art should understand the characteristics of the curing and forming of the composite material, and should not limit the invention.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: each embodiment does not include only one independent technical solution, and in the case of no conflict between the solutions, the technical features mentioned in the respective embodiments can be combined in any way to form other embodiments which can be understood by those skilled in the art.
Furthermore, modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, without departing from the scope of the present invention, and the essence of the corresponding technical solutions does not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. The utility model provides a flight platform joins externally combined material box for electronic equipment which characterized in that: the wall body forming the containing cavity is made of composite materials and is provided with two hanging parts which are oppositely arranged and two supporting parts which are used for connecting the two hanging parts, wherein the hanging parts are solid layers, the supporting parts are of sandwich structures, the inner skin and the outer skin of the wall body are continuous long layers, hanging connecting parts are arranged on the outer sides of the hanging parts, mounting holes of electronic equipment can be formed in the hanging parts and the supporting parts, the mounting holes and the hanging connecting parts are integrally formed with the wall body, and the hanging connecting parts and the wall body are integrally connected through inserting layers;
the sandwich layer of the sandwich structure is a foam core layer, the foam core layer comprises a corrugated reinforcing layer, the corrugated reinforcing layer is positioned between the outer skin and the inner skin, the space between the inner skin and the outer skin is divided into a plurality of filling cavities, and the filling cavities are filled with foam core blocks;
at least part of the filling cavity is provided with a reinforcing ring layer, the reinforcing ring layer divides the foam core block in the filling cavity into a plurality of block bodies, the number of the reinforcing ring layers is the same as that of the block bodies divided by the foam core block, and each reinforcing ring layer is coated with one divided block body.
2. The composite material box body for the flight platform external electronic equipment according to claim 1, characterized in that: the proportion of the inserting layers accounts for 0.25-0.35 of the total layers.
3. The composite material box body for the flight platform external electronic equipment according to claim 1, characterized in that: the two hanging parts are arranged in parallel at intervals, and the two supporting parts are respectively perpendicular to the two hanging parts.
4. The composite material box body for the flight platform external electronic equipment according to claim 1, characterized in that: a reinforcing block is arranged at the mounting hole of the supporting part and is positioned between the outer skin and the inner skin; and/or
The hole edge distance of the reinforcing block is at least 2.5 times of the hole diameter of the mounting hole, the size of the reinforcing block in the axial direction of the mounting hole is 100-105% of the theoretical size, the reinforcing block is formed by pressing chopped fiber premix, and the fiber volume content is 45-55%.
5. The composite material box body for the flight platform external electronic equipment according to claim 1, characterized in that: a cover mounting edge is arranged at the edge of the inner side of the wall body, and a region corresponding to the cover mounting edge is wound by 0-degree fibers between the inner skin and the outer skin, so that the region is thickened;
the end part of the wall body is provided with a cover connecting hole, and a steel wire thread sleeve is adopted at the cover connecting hole.
6. The composite material box body for the flight platform external electronic equipment according to claim 1, characterized in that: the outer skin and the inner skin are both made of unidirectional fiber and fabric mixed layers, the inner surface and the outer surface of the outer skin and the inner skin are made of fabrics, and the fiber directions are straight.
7. The composite material box body for the external electronic equipment of the flight platform according to claim 1 or 6, characterized in that: and the outermost layer of the outer skin adopts a metal net with the surface resistance not more than 5m omega/square meter.
8. The composite material box body for the flight platform external electronic equipment according to claim 1, characterized in that: the section of the filling cavity is trapezoidal;
in each filling cavity with the reinforcing ring layers, the sections of the reinforcing ring layers positioned on two sides are parallelogram, and the section of the reinforcing ring layer between two sides is trapezoid; and/or
The corrugated reinforcing layer adopts a fabric layer;
the reinforcing ring layer is formed by laying fibers in a 0-degree direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011129634.9A CN112291963B (en) | 2020-10-21 | 2020-10-21 | Composite material box for flight platform external-hanging electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011129634.9A CN112291963B (en) | 2020-10-21 | 2020-10-21 | Composite material box for flight platform external-hanging electronic equipment |
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| CN112291963A CN112291963A (en) | 2021-01-29 |
| CN112291963B true CN112291963B (en) | 2021-12-07 |
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| CN103987511A (en) * | 2011-10-11 | 2014-08-13 | 拜耳知识产权有限责任公司 | Method of manufacturing composite panel |
| CN107795149A (en) * | 2017-11-06 | 2018-03-13 | 中国人民解放军陆军工程大学 | A kind of lattice enhanced type composite material foam core support column and preparation method thereof |
| CN108081681A (en) * | 2017-12-15 | 2018-05-29 | 中国航空工业集团公司成都飞机设计研究所 | A kind of mixing sandwich structure and its processing method with sloped transition area |
| CN210590660U (en) * | 2019-09-12 | 2020-05-22 | 常州市新创智能科技有限公司 | Rail transit equipment cabin bottom plate forming die |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104143899A (en) * | 2013-05-10 | 2014-11-12 | 中国北车股份有限公司 | Cabinet used for converter, converter and rail vehicle |
| CN205818540U (en) * | 2016-06-17 | 2016-12-21 | 深圳市牧世复材科技有限公司 | A kind of composite carriage sandwich plate |
| CN206490117U (en) * | 2017-02-24 | 2017-09-12 | 宁德时代新能源科技股份有限公司 | Battery case |
| CN208338204U (en) * | 2018-05-30 | 2019-01-04 | 江苏恒神股份有限公司 | A kind of electromagnetic shielding composite material cabinet |
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| CN112291963A (en) | 2021-01-29 |
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