Connecting structure of low-scattering cover body

Abstract

A connecting structure of a low-scattering cover body comprises an aircraft, the cover body, a mounting plate, a plurality of pressing plates, a plurality of fixing seats and a base plate. A supporting rod is arranged at the bottom of the aircraft; the cover body covers the outer side of the supporting rod; the mounting plate is arranged around the outer side of one end of the cover body; the pressing plates are arranged on the mounting plate at equal intervals; one end of the pressing plate is hinged to the mounting plate, and the other end of the pressing plate is provided with a connecting plate; a through hole is formed in the connecting plate; the fixing seats surround the supporting rod, are fixedly arranged at the bottom of the aircraft and are arranged in one-to-one correspondence with the pressing plates; a through hole is formed in the fixed seat and is connected with the through hole in the connecting plate in a matching manner; the base plate is arranged around the supporting rod, the top of the base plate is connected to the fixing bases, and the base plate is arranged between the pressing plate and the mounting plate. The problems that common flange connection is inconvenient to disassemble and assemble, and connection is not tight enough are solved.

Description

Technical Field

[0001] The utility model relates to the field of aircraft testing, and more specifically, to a connection structure of a low-scattering cover body. Background Art

[0002] In recent years, various stealth aircraft require a large number of radar cross-section (RCS) tests during the stages of research and development, production, identification, and maintenance. Through detailed testing, the stealth defects of the aircraft can be identified, which can support the iterative optimization of the aircraft and also conduct performance appraisal of the aircraft.

[0003] During the aircraft development stage, generally, a near-field to far-field transformation test method based on a near-field test system is first used to preliminarily detect the stealth performance of the aircraft in the production site. This can basically identify the distribution of scattering sources on the airframe and also initially grasp the stealth performance of the aircraft, providing basic data for the optimization and improvement of the overall aircraft stealth performance.

[0004] During testing, a cylindrical support is generally used to firmly support the aircraft. However, its specular scattering, coupling scattering with the airframe and the ground are very strong. These scattering signals all belong to background clutter and have a great impact on the testing of current high-stealth aircraft. It is necessary to install a low-scattering cover outside the cylindrical support for protection. Therefore, a connection structure is needed that can completely cover the internal support column, make the top of the cover closely fit with the bottom of the airframe, and is convenient for disassembly and assembly. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a connection structure of a low-scattering cover body, which solves the problems of inconvenient disassembly and assembly and insufficient tightness of general flange connections.

[0006] The embodiments of the utility model are realized through the following technical solutions:

[0007] A connection structure of a low-scattering cover body, comprising:

[0008] An aircraft, with a support rod provided at the bottom of the aircraft;

[0009] A cover body, which covers the outside of the support rod;

[0010] A mounting plate, which is arranged around the outside of one end of the cover body;

[0011] A plurality of pressing plates, which are equidistantly arranged on the mounting plate; one end of each pressing plate is hinged to the mounting plate, and the other end is provided with a connecting plate; a through hole is provided on the connecting plate;

[0012] A plurality of fixing seats, which are arranged around the support rod and fixedly provided at the bottom of the aircraft and are arranged corresponding to the pressing plates one by one; through holes are provided on the fixing seats and are connected in cooperation with the through holes on the connecting plates;

[0013] A backing plate, which is arranged around the support rod, has its top connected to several of the fixing seats, and is placed between the pressing plate and the mounting plate.

[0014] A pressing block is provided on one side of the pressing plate close to the mounting plate.

[0015] A pressing groove is provided on one side of the mounting plate, and is correspondingly arranged with the pressing block on one side of the pressing plate.

[0016] The pressing blocks on adjacent pressing plates are in mutual contact.

[0017] Convex blocks and grooves are respectively provided at both ends of the pressing block; the convex block on the pressing block cooperates with the groove on the adjacent pressing block.

[0018] The material of the backing plate includes polyurethane, nylon or polytetrafluoroethylene.

[0019] The technical solution of the embodiment of the present utility model has at least the following advantages and beneficial effects:

[0020] For the connection structure of a low-scattering cover body of the present utility model, by providing a mounting plate at one end of the cover body connected to the aircraft, and providing a backing plate at the bottom of the aircraft, and then pressing the backing plate on the mounting plate through the rotatably arranged pressing plate, so that its connection part is connected. Since the backing plate is made of a deformable material, the connection is made more compact, improving the protection performance of the cover body, and adopting the connection methods of pressing and bolt connection, making its disassembly and assembly more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a partial structural schematic diagram of the present utility model when combined;

[0022] Figure 2 is a partial structural schematic diagram of the present utility model when separated;

[0023] Figure 3 is a partial structural schematic diagram of the mounting plate;

[0024] Figure 4 is a partial structural schematic diagram of the pressing plate;

[0025] Figure 5 is a partial structural schematic diagram of the backing plate.

[0026] In the figure, 101 - mounting plate, 102 - mounting seat, 103 - pressing plate, 104 - pressing block, 105 - connecting plate, 106 - pressing groove, 201 - fixing seat, 202 - backing plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. Components of the embodiments of the present utility model described and illustrated herein usually can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0029] As Figures 1-5 shown, a connection structure of a low-scattering cover body includes an annular mounting plate 101, a plurality of pressing plates 103, a plurality of fixing seats 201, and a backing plate 202; this connection structure is used to connect an aircraft and the cover body; a support rod is provided at the bottom of the aircraft; the cover body is wrapped outside the support rod; the mounting plate 101 is disposed around the outside of one end of the cover body; a plurality of pressing plates 103 are equidistantly disposed on the mounting plate 101; one end of the pressing plate 103 is hinged to the mounting plate 101; a plurality of fixing seats 201 are disposed around the support rod, fixedly connected to the bottom of the aircraft, and are arranged in one-to-one correspondence with the pressing plates 103; the backing plate 202 is disposed around the support rod, and its top is connected to the plurality of fixing seats 201.

[0030] As Figure 3 shown, a plurality of pressing grooves 106 are equidistantly provided on one surface of the mounting plate 101; a plurality of mounting seats 102 are correspondingly provided beside the plurality of pressing grooves 106.

[0031] As Figure 1 and 4 shown, one end of the pressing plate 103 is hinged to the mounting seat 102, and the other end thereof is provided with a connecting plate 105; a through hole is provided on the connecting plate 105; a pressing block 104 is provided on one side of the pressing plate 103 close to the mounting plate 101; protrusions and grooves are respectively provided at both ends of the pressing block 104; the protrusion on the pressing block 104 cooperates with the groove on the adjacent pressing block 104, and there is a gap therebetween.

[0032] Specifically, the shape of the pressing block 104 is the same as the shape of the corresponding pressing groove 106, so that when the pressing block 104 presses the backing plate 202 into the pressing groove 106, their connection is more closely fitted.

[0033] As Figure 1 and 5As shown, the fixing base 201 is provided with through holes, which cooperate with the through holes on the connecting plate 105 and are connected by bolts; the backing plate 202 is placed between the pressing plate 103 and the mounting plate 101, and the backing plate 202 is pressed tightly against the mounting plate 101 by rotating the pressing plate 103;

[0034] Specifically, the material of the backing plate 202 is preferably polyurethane, nylon or polytetrafluoroethylene; and they all have certain applications in preventing radar signals.

[0035] After installation, the backing plate 202 is located below the aircraft and on the outside of the upper end of the cover body. Since the backing plate 202 is a flexible material, it is deformed by the pressing of the pressing block 104, filling the gap between the mounting plate 101 and the pressing block 104, and sealing between the bottom of the aircraft and the cover body.

[0036] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A connection structure of a low-scattering cover body, characterized in that Comprising: An aircraft, with a support rod provided at the bottom of the aircraft; A cover body, which is wrapped around the outside of the support rod; A mounting plate, which is arranged around the outside of one end of the cover body; A number of pressing plates, which are equidistantly arranged on the mounting plate; one end of each pressing plate is hinged to the mounting plate, and the other end is provided with a connecting plate; a through hole is provided on the connecting plate; A number of fixing seats, which are arranged around the support rod and fixedly provided at the bottom of the aircraft, and are arranged in one-to-one correspondence with the pressing plates; through holes are provided on the fixing seats and are connected in cooperation with the through holes on the connecting plates; A backing plate, which is arranged around the support rod, and its top is connected to a number of the fixing seats and is placed between the pressing plates and the mounting plate.

2. The connection structure of a low-scattering cover body according to claim 1, wherein A pressing block is provided on the side of the pressing plate close to the mounting plate.

3. The connecting structure of a low-scattering cover body according to claim 2, wherein, A pressing groove is provided on one side of the mounting plate and corresponds to the pressing block on one side of the pressing plate.

4. The connecting structure of a low-scattering cover body according to claim 3, characterized in that The pressing blocks on adjacent pressing plates are mutually attached.

5. The connection structure of a low-scattering cover body according to claim 4, characterized in that, Protrusions and grooves are respectively further provided at both ends of the pressing block; the protrusions on the pressing block cooperate with the grooves on the adjacent pressing block.

6. The connection structure of a low-scattering cover body according to claim 1, characterized in that The material of the backing plate includes polyurethane, nylon or polytetrafluoroethylene.

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