Integrated trailing edge structure and winglet assembly with electrostatic discharger installed.

Abstract

This utility model relates to the field of aircraft structural design technology, and discloses an integral trailing edge structure and winglet assembly for mounting an electrostatic discharger. The integral trailing edge structure for mounting the electrostatic discharger includes a trailing edge strip and a bushing. A mounting hole is provided on the edge of the trailing edge strip, located at the center of the strip's thickness direction. The bushing is interference-fitted into the mounting hole, and its inner wall has an internal thread. The mounting end of the electrostatic discharger has an external thread that matches the internal thread, allowing it to be threadedly connected to the bushing. Providing a mounting hole on the edge of the trailing edge strip, compared to the conventional method of fixing the electrostatic discharger to the winglet trailing edge using a mounting base, avoids a large area of ​​the electrostatic discharger protruding from the aerodynamic shape after mounting, thus reducing flight drag and aerodynamic wear. The electrostatic discharger and trailing edge strip are threadedly connected by the bushing. The bushing's interference fit with the mounting hole allows for easy and economical maintenance by replacing the bushing when its internal thread wears.

Description

Technical Field

[0001] This utility model relates to the field of aircraft structural design technology, and in particular to an integral trailing edge structure and winglet assembly for mounting an electrostatic discharger. Background Technology

[0002] Multiple electrostatic dischargers are required at the trailing edge of the winglet to eliminate static electricity on the fuselage surface. Traditionally, these dischargers are used in pairs with bases mounted on the fuselage surface, and the bases are riveted to the trailing edge of the structure. The installation process involves a series of steps, including positioning, countersinking, drilling, electrical overlap treatment of the mating surfaces, fastener installation, and fastener sealing. Because of the significant curvature of the winglet trailing edge, poor fit is easily achieved, leading to substandard electrical overlaps. Furthermore, the installation of the base often requires grinding the trailing edge surface to ensure a proper fit, further slowing down mass production. Additionally, the base, directly mounted on the winglet surface, has a large protruding aerodynamic shape. Over long-term operation, this not only increases aerodynamic drag but also causes wind erosion, leading to wear and eventual detachment. In airline operations, if the winglet is damaged and needs replacement, the base requires on-site drilling and the aforementioned steps, hindering rapid winglet replacement, failing to meet overall interchangeability requirements, and increasing airline operating and maintenance costs.

[0003] Therefore, there is an urgent need for an integral trailing edge structure and winglet assembly for mounting an electrostatic discharger to solve the above problems. Utility Model Content

[0004] One objective of this invention is to provide an integral trailing edge structure for mounting an electrostatic discharger, which can meet the installation requirements of the electrostatic discharger, maintain the streamlined shape of the winglet, and simultaneously achieve overall interchangeability, maintainability, and economy of the winglet.

[0005] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0006] An integral trailing edge structure for mounting an electrostatic discharger is provided, comprising:

[0007] A trailing edge strip, wherein mounting holes are provided on the edge of the trailing edge strip, and the mounting holes are located at the middle of the thickness direction of the trailing edge strip;

[0008] A bushing is inserted into the mounting hole with an interference fit. The inner wall of the bushing is provided with an internal thread. The mounting end of the electrostatic discharger has an external thread that matches the internal thread. The mounting end can be threaded into the bushing.

[0009] Optionally, the trailing edge strip includes a main body and a protruding part. In the thickness direction of the trailing edge strip, the protruding part protrudes from both sides of the main body. The mounting hole is provided on the protruding part, and a rounded corner is provided at the connection between the main body and the protruding part.

[0010] Optionally, the protrusion is a cylindrical structure, and in the axial direction of the protrusion, the protrusion protrudes beyond the edge of the main body, and the axial direction of the cylindrical structure is set at an angle to the edge of the main body.

[0011] Optionally, along the axial direction of the mounting hole, the minimum distance between the bottom wall of the mounting hole and the main body is L1, where L1 ≥ 3 mm.

[0012] Optionally, along the radial direction of the mounting hole, the main body portion is provided with a minimum wall thickness of L2 at the mounting hole, where L2 ≥ 1.5 mm.

[0013] Optionally, the main body and the protrusion are integrally formed, the tail edge is made of metal, and the mounting hole is formed on the protrusion by machining.

[0014] Optionally, the interference fit between the bushing and the mounting hole ranges from 0.02 mm to 0.06 mm.

[0015] Optionally, a plurality of mounting holes are provided on the trailing edge strip along its length.

[0016] Another objective of this invention is to provide a winglet assembly that can meet the installation requirements of electrostatic dischargers, maintain the streamlined shape of the winglet, and simultaneously achieve overall interchangeability, maintainability, and economy of the winglet.

[0017] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0018] A winglet assembly is provided, including a winglet trailing edge and the aforementioned integral trailing edge structure for mounting an electrostatic discharger, wherein the trailing edge strip is fixed to the winglet trailing edge.

[0019] The beneficial effects of this utility model are as follows:

[0020] This invention proposes an integral trailing edge structure for mounting an electrostatic discharger, comprising a trailing edge strip and a bushing. A mounting hole is provided on the edge of the trailing edge strip, located at the center of the strip's thickness direction. The bushing is interference-fitted into the mounting hole, and its inner wall has internal threads. The mounting end of the electrostatic discharger has external threads that match these internal threads, allowing it to be threadedly connected to the bushing. Providing a mounting hole on the edge of the trailing edge strip for mounting the electrostatic discharger avoids a large protrusion from the aerodynamic shape after mounting, reducing flight drag and aerodynamic wear, compared to the previous method of fixing the electrostatic discharger to the winglet trailing edge using a mounting base. Furthermore, the connection between the electrostatic discharger and the trailing edge strip is achieved through a threaded connection using a bushing. The interference fit between the bushing and the mounting hole allows for maintenance by replacing the bushing when the internal threads wear, which is more convenient and economical than directly providing a threaded hole for fixing the electrostatic discharger on the winglet trailing edge.

[0021] The winglet assembly proposed in this utility model includes a winglet trailing edge and the aforementioned integral trailing edge structure for mounting an electrostatic discharger, with the trailing edge strip fixed to the winglet trailing edge. This winglet assembly can meet the installation requirements of the electrostatic discharger, maintain the streamlined shape of the winglet, and simultaneously achieve overall interchangeability, maintainability, and economy for the winglet. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the integral trailing edge structure for mounting an electrostatic discharger and a partially exploded structure of the electrostatic discharger provided in this embodiment of the utility model.

[0023] Figure 2 yes Figure 1 Sectional view at point AA;

[0024] Figure 3 This is an exploded view of the integral trailing edge structure for mounting an electrostatic discharger provided in this embodiment of the utility model;

[0025] Figure 4 yes Figure 3 Enlarged view of point B in the middle;

[0026] Figure 5 This is a schematic diagram of the integral trailing edge structure for mounting an electrostatic discharger and the structure of the electrostatic discharger provided in this embodiment of the utility model;

[0027] Figure 6 yes Figure 5 A magnified view of point C in the middle.

[0028] In the picture:

[0029] 1. Tail flange; 11. Main body; 12. Protrusion; 121. Mounting hole;

[0030] 2. Bushing;

[0031] 3. Electrostatic discharger; 31. Mounting end; 311. External thread. Detailed Implementation

[0032] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effects achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0036] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0037] like Figures 1 to 6As shown, this embodiment provides an integral trailing edge structure for mounting an electrostatic discharger, including a trailing edge strip 1 and a bushing 2. A mounting hole 121 is provided on the edge of the trailing edge strip 1, located at the center of the thickness direction of the trailing edge strip 1. The bushing 2 is interference-fitted into the mounting hole 121, and its inner wall has an internal thread. The mounting end 31 of the electrostatic discharger 3 has an external thread 311 that matches the internal thread, allowing the mounting end 31 to be threaded into the bushing 2. Providing a mounting hole 121 on the edge of the trailing edge strip 1 for mounting the electrostatic discharger 3 avoids the electrostatic discharger 3 protruding significantly from the trailing edge of the winglet after mounting, thus reducing flight drag and aerodynamic wear, compared to the conventional method of fixing the electrostatic discharger 3 to the trailing edge of the winglet using a mounting base. In addition, the installation of the electrostatic discharger 3 and the tail edge strip 1 is achieved by adding a bushing 2 to realize a threaded connection. The bushing 2 is interference-fitted with the mounting hole 121. When the internal thread on the bushing 2 is worn, it can be repaired by replacing the bushing 2. This is more convenient and economical than directly setting a threaded hole for fixing the electrostatic discharger 3 on the tail edge strip 1.

[0038] In this embodiment, the interference fit between the bushing 2 and the mounting hole 121 ranges from 0.02 mm to 0.06 mm. A suitable interference fit is selected to ensure the fixing strength of the bushing 2 within the mounting hole 121, while avoiding damage to the mounting hole 121 when replacing the bushing 2.

[0039] Optionally, such as Figure 1 and Figure 2 As shown, the trailing edge strip 1 includes a main body 11 and a protrusion 12. In the thickness direction of the trailing edge strip 1, the protrusion 12 protrudes from both sides of the main body 11. The mounting hole 121 is provided on the protrusion 12, and the connection between the main body 11 and the protrusion 12 is rounded. In a specific implementation, since the mounting hole 121 is cylindrical, the protrusion 12 is preferably cylindrical, while the shape of the main body 11 that adapts to the trailing edge of the winglet is plate-shaped. Therefore, corners are formed between the protrusion 12 and the main body 11 in both the axial direction of the protrusion 12 and in the direction perpendicular to the axial direction of the protrusion 12. To ensure a smooth transition between the mounting position of the electrostatic discharger 3 and the surrounding area, the corners formed at the connection between the main body 11 and the protrusion 12 are all rounded.

[0040] Optionally, the protrusion 12 is a cylindrical structure. In the axial direction of the protrusion 12, the protrusion 12 protrudes beyond the edge of the main body 11, and the axial direction of the cylindrical structure forms an angle with the edge of the main body 11. Specifically, the axial direction of the protrusion 12 is arranged according to the angle between the electrostatic discharger 3 and the tail edge strip 1. To ensure the axial extension length of the internal thread, the end of the protrusion 12 with the opening of the mounting hole 121 at least partially protrudes beyond the edge of the main body 11. In other embodiments, the protrusion 12 can also be a cylindrical structure with one end being a slope. In this case, the end of the protrusion 12 with the opening of the mounting hole 121 does not need to protrude beyond the edge of the main body 11. Instead, the axial depth of the mounting hole 121 is extended inward so that the bushing 2 can be entirely located within the mounting hole 121 without protruding beyond the edge of the main body 11.

[0041] Optionally, a plurality of mounting holes 121 are provided on the tail edge 1 along its length. The angle between the axial direction of each mounting hole 121 and the edge of the main body 11 is determined according to the mounting angle of the electrostatic discharger 3. The spacing between adjacent mounting holes 121 and the total number of mounting holes 121 can also be adjusted according to design requirements.

[0042] Optionally, the main body 11 and the protrusion 12 are integrally formed, the tail flange 1 is made of metal, and the mounting hole 121 is formed on the protrusion 12 by machining. In specific implementations, the tail flange 1 can be made of aluminum alloy, titanium alloy, etc. When machining the mounting hole 121 on the tail flange 1, the part of the protrusion 12 that protrudes from the main body 11 can be formed by cutting, and then the mounting hole 121 of a preset size can be formed on the protrusion 12 by using a drill bit.

[0043] In this embodiment, along the axial direction of the mounting hole 121, the minimum distance between the bottom wall of the mounting hole 121 and the main body 11 is L1, where L1 ≥ 3mm, to ensure the connection strength between the main body 11 and the protrusion 12 and to avoid damage at the connection between the two due to the large external force on the protrusion 12.

[0044] In this embodiment, along the radial direction of the mounting hole 121, the main body 11 has a minimum wall thickness of L2 at the mounting hole 121, where L2 ≥ 1.5 mm. In specific implementation, since the mounting end 31 of the electrostatic discharger 3 is inserted into the mounting hole 121, the mounting end 31 transmits a corresponding force to the inner wall of the mounting hole 121 when subjected to gravity or other forces. Therefore, it is necessary to ensure that the wall thickness of the mounting hole 121 is greater than or equal to 1.5 mm to guarantee its strength.

[0045] This embodiment also provides a winglet assembly, including a winglet trailing edge and the aforementioned integral trailing edge structure for mounting an electrostatic discharger, with the trailing edge strip 1 fixed to the winglet trailing edge. In specific implementations, the trailing edge strip 1 can be fixed to the winglet trailing edge by bolting, riveting, bonding, welding, etc. The integral trailing edge structure for mounting the electrostatic discharger in this winglet assembly not only meets the installation requirements of the electrostatic discharger but also maintains the streamlined shape of the winglet, while simultaneously achieving overall interchangeability, maintainability, and economy for the winglet.

[0046] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A one-piece trailing edge structure incorporating an electrostatic discharge device, characterised in that, include: Tail edge strip (1), the edge of the tail edge strip (1) is provided with mounting holes (121), the mounting holes (121) are located in the middle of the thickness direction of the tail edge strip (1); The bushing (2) is inserted into the mounting hole (121) with an interference fit. The inner wall of the bushing (2) is provided with an internal thread. The mounting end (31) of the electrostatic discharger (3) has an external thread (311) that matches the internal thread. The mounting end (31) can be threaded into the bushing (2).

2. The integrated tip structure mounting an electrostatic discharge device according to claim 1, wherein The trailing edge strip (1) includes a main body (11) and a protrusion (12). In the thickness direction of the trailing edge strip (1), the protrusion (12) protrudes from both sides of the main body (11). The mounting hole (121) is provided on the protrusion (12). The connection between the main body (11) and the protrusion (12) is rounded.

3. The integrated tip structure mounting an electrostatic discharge device according to claim 2, wherein The protrusion (12) is a cylindrical structure. In the axial direction of the protrusion (12), the protrusion (12) protrudes beyond the edge of the main body (11), and the axial direction of the cylindrical structure is set at an angle to the edge of the main body (11).

4. The integrated tip structure mounting an electrostatic discharge device of claim 2, wherein Along the axial direction of the mounting hole (121), the minimum distance between the bottom wall of the mounting hole (121) and the main body (11) is L1, where L1 ≥ 3 mm.

5. The integrated tip-shroud structure of claim 2, wherein Along the radial direction of the mounting hole (121), the main body (11) is provided with a minimum wall thickness of L2 at the mounting hole (121), where L2 ≥ 1.5 mm.

6. The integrated tip-shroud structure of claim 2, wherein The main body (11) and the protrusion (12) are integrally formed, the tail strip (1) is made of metal, and the mounting hole (121) is opened on the protrusion (12) by machining.

7. The integrated tip-shroud structure of claim 1, wherein The interference fit between the bushing (2) and the mounting hole (121) ranges from 0.02 mm to 0.06 mm.

8. The integrated tip structure mounting an electrostatic discharge device of claim 1, wherein Along the length direction of the trailing edge (1), a plurality of mounting holes (121) are provided on the trailing edge (1).

9. A winglet assembly, characterized in that, It includes a trailing edge of the winglet and an integral trailing edge structure for mounting an electrostatic discharger as described in any one of claims 1 to 8, wherein the trailing edge strip (1) is fixed to the trailing edge of the winglet.

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