A connection structure between a fairing and a mounting plate

Abstract

The present invention discloses a connection structure between a fairing and a mounting plate, comprising: a fairing body; a connecting screw, wherein a spring accommodating cavity is provided inside the screw rod of the connecting screw, and a notch communicating with the spring accommodating cavity is formed on the rod wall of the screw rod of the connecting screw; an anti-detachment spring, which is placed inside the spring accommodating cavity; a mounting plate body, a support plate is fixed on the bottom end surface of the mounting plate body, a nut mounting plate is fixed on the bottom end surface of the support plate, and a plurality of lapping holes are formed on the nut mounting plate; a movable nut, a plurality of lapping lugs are integrally connected to the outer edge of the head end of the movable nut, and the plurality of lapping lugs are lap-connected to the plurality of lapping holes one by one; the connecting screw sequentially passes through the fairing body, the mounting plate body, the support plate, the nut mounting plate and is screwed and fixed with the movable nut, and the lower end of the anti-detachment spring extends out through the notch to form a stop bent portion, and the stop bent portion stops on the lower end surface of the movable nut. This connection structure is easy to disassemble and assemble, has a long service life, and high structural reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of aircraft propellers, and more specifically, to a connection structure between a fairing and a mounting plate. Background Art

[0002] The existing propeller fairing and mounting plate both adopt composite material structures. Generally speaking, the fairing and mounting plate are relatively large in size. To achieve their connection, multiple screws and nuts are required for connection. In fact, multiple fixations are over-positioning requirements, and the precision requirements for individual parts are very high. Moreover, the fairing and mounting plate are thin-walled composite material products, and they are prone to large deformation after processing. Basically, according to the existing processing methods, only the method of drilling the fairing and mounting plate together can be used to achieve the installation purpose, and it is difficult to disassemble after installation. After each hole is installed, marks need to be drawn, and when reinstalled after disassembly, the corresponding marks must be found and reinstalled in place, which greatly increases the disassembly and assembly difficulty of the fairing and mounting plate. In addition, the screws and nuts are prone to loosening after long-term use, resulting in poor reliability of the connection structure between the fairing and the mounting plate.

[0003] Therefore, how to provide a connection structure between a fairing and a mounting plate that is easy to disassemble and assemble, has a long service life, is structurally reliable, and has good performance and functions is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the present invention provides a connection structure between a fairing and a mounting plate that is easy to disassemble and assemble, has a long service life, is structurally reliable, and has good performance and functions.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A connection structure between a fairing and a mounting plate, comprising:

[0007] A fairing body, on which connection screw mounting holes are provided;

[0008] Connection screws, which are inserted into the connection screw mounting holes. A spring receiving cavity is provided inside the screw rod of the connection screw, and a notch communicating with the spring receiving cavity is provided on the screw rod wall of the connection screw;

[0009] Anti-loosening springs, which are placed inside the spring receiving cavities;

[0010] A mounting plate body, on which first connection screw through holes are provided. A support plate is fixed on the bottom end surface of the mounting plate body. Second connection screw through holes are provided on the support plate. A nut mounting plate is fixed on the bottom end surface of the support plate. Third connection screw through holes and a plurality of overlapping holes are provided on the nut mounting plate;

[0011] The movable nut has a plurality of overlapping lugs integrally connected to the outer edge of the head end thereof, and the plurality of overlapping lugs are respectively and overlappingly connected to the plurality of overlapping holes; the connecting screw sequentially passes through the connecting screw mounting hole, the first connecting screw passing hole, the second connecting screw passing hole, the third connecting screw passing hole and is screwed and fixed to the movable nut. The lower end of the anti-loosening spring extends out through the notch to form a stop bent portion, and the stop bent portion stops on the lower end surface of the movable nut.

[0012] As can be seen from the above technical solutions, compared with the prior art, the present invention discloses a connection structure between a fairing and a mounting plate. After the connecting screw is screwed to the movable nut, the lower end of the anti-loosening spring is extended out through the notch by a special tool. At this time, the lower end of the anti-loosening spring forms a stop bent portion and stops on the lower end surface of the movable nut, which can prevent the connecting screw from disengaging from the movable nut, thereby ensuring the stability of the connection structure between the fairing and the mounting plate. And when disassembly is required, the stop bent portion is pushed into the spring receiving cavity by a special tool, and the connecting screw can be screwed out of the movable nut, so that the rapid disassembly and assembly of the fairing and the mounting plate can be realized. Moreover, the overlapping lugs on the movable nut are overlapped on the overlapping holes, so that the movable nut can move, which is convenient for the rapid installation of the connecting screw.

[0013] Further, a bushing is press-fitted in the connecting screw mounting hole, and the connecting screw is disposed in the bushing.

[0014] The beneficial effect of adopting the above technical solution is to prevent the connecting screw from damaging the fairing.

[0015] Further, the thickness of the bushing is 0.5 - 0.8 mm.

[0016] Further, a damping gasket is adhered to the bottom end surface of the fairing body.

[0017] Further, the damping gasket is made by high-temperature pressing of phenolic resin and cotton cloth.

[0018] The beneficial effect of adopting the above technical solution is that the fairing and the mounting plate are in soft contact, which can avoid damage caused by hard contact when the two are connected, and also play a role in shock absorption and noise reduction (because the movable nut is movable, there will be a certain noise when the connecting screw is connected to the movable nut).

[0019] Further, the support plate and the mounting plate body are fixedly connected by rivets.

[0020] Further, the notch is in a rectangular groove shape, its groove width is 1 - 3 mm, and its length is 20 - 25 mm.

[0021] Further, the thread on the connecting screw is a double-thread thread.

[0022] The beneficial effects of adopting the above technical solution are as follows: the self-locking ability of the connecting screw is improved, and the connection stability between the fairing and the mounting plate is ensured.

[0023] Further, there are four overlapping lugs, two of which are a pair of long lugs and the other two are a pair of short lugs. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0025] Figure 1 The drawings are schematic structural diagrams of a connection structure between a fairing and a mounting plate provided by the present invention.

[0026] Figure 2 The drawings are schematic structural diagrams of the connecting screw.

[0027] Figure 3 The drawings are schematic structural diagrams of the overlapping holes on the nut mounting plate.

[0028] Figure 4 The drawings are top view structural diagrams of the movable nut. Detailed Embodiments

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0030] See Figures 1-4 , the embodiments of the present invention disclose a connection structure between a fairing and a mounting plate, including:

[0031] A fairing body 1, on which a connecting screw mounting hole 101 is provided;

[0032] A connecting screw 2, which is inserted into the connecting screw mounting hole 101. A spring receiving cavity 201 is provided inside the screw rod of the connecting screw 2, and a notch 202 communicating with the spring receiving cavity 201 is provided on the screw rod wall of the connecting screw 2;

[0033] An anti-detachment spring 3, which is placed inside the spring receiving cavity 201;

[0034] The mounting disk body 4 is provided with a first connecting screw through hole 401. A support plate 5 is fixed on the bottom end surface of the mounting disk body 4. The support plate 5 is provided with a second connecting screw through hole 501. A nut mounting plate 6 is fixed on the bottom end surface of the support plate 5. The nut mounting plate 6 is provided with a third connecting screw through hole 601 and a plurality of lapping holes 602.

[0035] A movable nut 7. A plurality of lapping lugs 701 are integrally connected to the outer edge of the head end of the movable nut 7. The plurality of lapping lugs 701 are lapped and connected to the plurality of lapping holes 602 one by one, that is, the lapping lugs pass through the lapping holes. The connecting screw 2 sequentially passes through the connecting screw mounting hole 101, the first connecting screw through hole 401, the second connecting screw through hole 501, and the third connecting screw through hole 601 and is screwed and fixed with the movable nut 7. The lower end of the anti-loosening spring 3 extends out through the notch 202 to form a stop bent portion 31. The stop bent portion 31 stops on the lower end surface of the movable nut 7.

[0036] A bushing 8 is press-fitted in the connecting screw mounting hole 101. The connecting screw 2 is arranged in the bushing 8.

[0037] The thickness of the bushing 8 is 0.5 - 0.8 mm.

[0038] A damping gasket 9 is adhered to the bottom end surface of the fairing body 1.

[0039] The damping gasket 9 is made by hot pressing phenolic resin and cotton cloth in a hot pressure tank.

[0040] The support plate 5 and the mounting disk body 4 are fixedly connected by a rivet 10.

[0041] The notch 202 is in the shape of a rectangular groove. Its groove width is 1 - 3 mm, and its length is 20 - 25 mm.

[0042] The thread on the connecting screw 2 is a double-thread thread.

[0043] There are four lapping lugs 701. Two of them are a pair of long lugs, and the other two are a pair of short lugs.

[0044] For the connection structure of the present invention, after the connecting screw is screwed with the movable nut, the lower end of the anti-loosening spring is extended out through the notch by a special tool. At this time, the lower end of the anti-loosening spring forms a stop bent portion and stops on the lower end surface of the movable nut, which can prevent the connecting screw from disengaging from the movable nut, thereby ensuring the stability of the connection structure between the fairing and the mounting disk. And when disassembly is required, the stop bent portion is pushed into the spring receiving cavity by a special tool, and the connecting screw can be screwed out of the movable nut, so that the quick disassembly and assembly of the fairing and the mounting disk can be realized. Moreover, the lapping lugs on the movable nut are lapped on the lapping holes, making the movable nut movable and facilitating the quick installation of the connecting screw. At the same time, this connection structure can effectively ensure the interchangeability requirements of individual parts.

[0045] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For the relevant parts, reference can be made to the description in the method section.

[0046] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A connection structure between a fairing and a mounting plate, characterized in that Comprising: A fairing body (1), on which connection screw mounting holes (101) are provided; Connection screws (2), which are inserted into the connection screw mounting holes (101). A spring accommodation cavity (201) is provided inside the screw rod of the connection screw (2), and a notch (202) communicating with the spring accommodation cavity (201) is provided on the screw rod wall of the connection screw (2); Anti-detachment springs (3), which are placed inside the spring accommodation cavity (201); An installation disc body (4), on which first connection screw insertion holes (401) are provided. A support plate (5) is fixed on the bottom end surface of the installation disc body (4). Second connection screw insertion holes (501) are provided on the support plate (5). A nut mounting plate (6) is fixed on the bottom end surface of the support plate (5). Third connection screw insertion holes (601) and a plurality of overlapping holes (602) are provided on the nut mounting plate (6); A movable nut (7), on the outer edge of the head end of which a plurality of overlapping lugs (701) are integrally connected. The plurality of overlapping lugs (701) are overlapped and connected with the plurality of overlapping holes (602) one by one. The connection screw (2) sequentially passes through the connection screw mounting hole (101), the first connection screw insertion hole (401), the second connection screw insertion hole (501), the third connection screw insertion hole (601) and is screwed and fixed with the movable nut (7). The lower end of the anti-detachment spring (3) extends out through the notch (202) to form a stop bent portion (31), and the stop bent portion (31) stops on the lower end surface of the movable nut (7).

2. The connection structure between the fairing and the mounting plate according to claim 1, characterized in that, A bushing (8) is press-fitted in the connection screw mounting hole (101), and the connection screw (2) is inserted into the bushing (8).

3. The connection structure between a fairing and a mounting plate according to claim 2, characterized in that, The thickness of the bushing (8) is 0.5 - 0.8 mm.

4. The connection structure between a fairing and a mounting disc according to claim 1, wherein A damping gasket (9) is adhered to the bottom end surface of the fairing body (1).

5. The connection structure between a fairing and a mounting plate according to claim 4, characterized in that, The damping gasket (9) is made by high-temperature pressing of phenolic resin and cotton cloth.

6. The connecting structure between a fairing and a mounting plate according to claim 1, wherein The support plate (5) and the installation disc body (4) are fixedly connected by rivets (10).

7. The connection structure between the fairing and the mounting plate according to claim 1, characterized in that The notch (202) is in a rectangular groove shape, its groove width is 1 - 3 mm, and its length is 20 - 25 mm.

8. A connection structure between a fairing and a mounting plate according to claim 1, characterized in that, The thread on the connection screw (2) is a double-thread thread.

9. The connection structure between a fairing and a mounting plate according to claim 1, characterized in that, There are four overlapping lugs (701), two of which are a pair of long lugs, and the other two are a pair of short lugs.

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