Landing gear wire harness sheath assembly

Abstract

The invention provides an undercarriage wire harness sheath assembly, and belongs to the technical field of cable protection, the undercarriage wire harness sheath assembly specifically comprises a shielding hose, a connecting nut, a tail accessory, a neck bush, an outer bush and a connecting sleeve, the neck bush and the outer bush clamp the shielding hose, the neck bush is provided with a first annular connecting sheet made of a metal material, and the outer bush is provided with a second annular connecting sheet made of a metal material; a first annular connecting piece made of metal is arranged at the first end of the outer lining, a second annular connecting piece made of metal is arranged at the end of the outer lining, the first annular connecting piece and the second annular connecting piece are stacked together, the connecting nut is arranged on the periphery of the outer lining in a sleeving mode, the connecting nut is in threaded connection with the tail accessory to fix the tail accessory to the first end, and a pressing ring is arranged on the connecting nut. The pressing ring is used for pressing the first annular connecting piece and the second annular connecting piece on the end face of the tail accessory. One end of the connecting sleeve is detachably fixed to the second end of the shielding hose, and the connecting sleeve is used for being in threaded connection with an equipment wire outlet. According to the processing scheme of the invention, the quick dismounting performance and the shielding sealing performance of the sheath assembly in a narrow space are improved.

Description

Technical Field

[0001] This application relates to the field of cable protection, and more particularly to a landing gear harness sheath assembly. Background Technology

[0002] As a critical load-bearing component of an aircraft, the landing gear operates in a compact space under harsh conditions, requiring it to withstand continuous mechanical stress, liquid corrosion, and electromagnetic interference. This places extremely high demands on the ease of installation, sealing performance, shielding effectiveness, and environmental adaptability of cable protection components. In existing technologies, traditional metal tubing sheaths are heavy and lack flexibility, making them difficult to adapt to the complex and confined space of the landing gear installation. Conventional cable protection components require significant installation space when assembling connectors, making installation and removal difficult in space-constrained areas such as the landing gear, resulting in low maintenance efficiency. For connectorless equipment outlets, existing sheaths often use a cable-spinning method, which lacks sufficient sealing, making them susceptible to corrosion from hydraulic oil and moisture. Furthermore, the discontinuous shielding structure cannot effectively resist electromagnetic interference, leading to poor cable signal transmission stability. In addition, some protection components have fixed structural designs with weak versatility, requiring repeated design for different connector specifications. This not only increases manufacturing costs but also reduces product consistency and lifespan, failing to meet the stringent requirements of the modern aviation industry for lightweight design, high reliability, low maintenance costs, and strong environmental adaptability. Summary of the Invention

[0003] In view of this, this application provides a landing gear wiring harness sheath assembly, which solves the problems in the prior art and improves the quick-release and shielding sealing performance of the sheath assembly in narrow spaces.

[0004] The landing gear wiring harness sheath assembly provided in this application adopts the following technical solution: A landing gear wiring harness sheath assembly includes a shielded flexible tube, a connecting nut, a tail accessory, an inner bushing, an outer bushing, and a connecting sleeve. The shielded flexible tube is fitted around the outer periphery of the wiring harness, and the connecting nut, inner bushing, outer bushing, and connecting sleeve are made of metal. The inner and outer bushings are located at the first end of the shielded hose. One end of the inner bushing is located on the outer periphery of the shielded hose and is fitted around the outer periphery of the wire harness. The outer bushing is fitted around the outer periphery of the shielded hose. The inner and outer bushings clamp the shielded hose. The inner bushing is provided with a first annular connecting piece made of metal. The first annular connecting piece is located outside the shielded hose and surrounds the outer periphery of the wire harness. The end of the outer bushing is provided with a second annular connecting piece made of metal. The second annular connecting piece surrounds the outer periphery of the inner bushing. The first and second annular connecting pieces are stacked together. The connecting nut is fitted around the outer periphery of the outer bushing. The connecting nut and the tail accessory are threaded together to fix the tail accessory to the first end. The connecting nut is provided with a clamping ring. The clamping ring is used to press the first and second annular connecting pieces against the end face of the tail accessory. One end of the connecting sleeve is detachably fixed to the second end of the shielded flexible tube, and the connecting sleeve is used for threaded connection with the equipment outlet.

[0005] Optionally, the connecting sleeve includes an insertion end that extends into the shielded flexible tube and a threaded connecting sleeve located outside the shielded flexible tube. The inner wall of the threaded connecting sleeve is provided with internal threads, and the threaded connecting sleeve is used for threaded connection with the outlet of the equipment.

[0006] Optionally, the insertion end is secured to the shielding hose by a cable tie that surrounds the outer periphery of the second end of the shielding hose.

[0007] Optionally, the insertion end is fixed by two steel cable ties. The two steel cable ties are arranged sequentially along the length of the shielded hose. The steel cable tie closer to the threaded connection sleeve presses the metal mesh of the shielded hose against the outer periphery of the insertion end, so that the metal mesh at the second end of the shielded hose contacts the insertion end. The inner plastic hose of the shielded hose corresponding to the area of ​​the other steel cable tie contacts the insertion end.

[0008] Optionally, the inner diameter of the threaded connecting sleeve is larger than the inner diameter of the insertion end, and an annular platform is provided inside the threaded connecting sleeve near the insertion end, and a sealing ring is provided inside the threaded connecting sleeve on the side of the annular platform opposite to the insertion end.

[0009] Optionally, the inner layer of the shielding hose is made of polytetrafluoroethylene.

[0010] In summary, this application includes the following beneficial technical effects: The wire harness sheath assembly in this application can be connected to different connectors using tail accessories of different specifications to meet the docking requirements of various devices. The use of connecting sleeves ensures that the wire harness protection requirements are met in confined spaces, guaranteeing reliable signal transmission of the internal cables under harsh environments, continuous mechanical stress, electromagnetic interference, and other complex and severe conditions. It solves the technical problems of traditional cable connector assembly, such as high space requirements, difficulty in installation and removal in narrow areas, and poor sheath sealing and discontinuous shielding when no connectors are available. It can be applied to electrical systems in aircraft with stringent environmental requirements and limited installation space.

[0011] Moreover, the wire harness sheath assembly has a simple structure, short processing time, high production efficiency, good controllability and consistency, long product life cycle, and convenient and reliable product installation and fixing. The wire harness structure design is novel and practical, with broad application prospects. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall structure of the landing gear wiring harness sheath assembly. Figure 2 This is a schematic diagram of the structure for connecting the nut; Figure 3 This is a schematic diagram of the connecting sleeve.

[0014] Explanation of reference numerals in the attached drawings: 1. Shielded flexible hose; 2. Connecting nut; 21. Compression ring; 3. Outer bushing; 4. Inner bushing; 5. Steel cable tie; 6. Sealing gasket; 7. Connecting sleeve; 71. Insertion end; 72. Threaded connecting sleeve; 8. Tail accessory. Detailed Implementation

[0015] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0016] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0017] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0018] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0019] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0020] This application provides a landing gear wiring harness sheath assembly.

[0021] like Figures 1 to 3 As shown, a landing gear wiring harness sheath assembly includes a shielded flexible tube 1, a connecting nut 2, a tail accessory 8, an inner bushing 4, an outer bushing 3, and a connecting sleeve 7. The shielded flexible tube 1 is fitted around the outer periphery of the wiring harness, and the connecting nut 2, the inner bushing 4, the outer bushing 3, and the connecting sleeve 7 are made of metal.

[0022] The inner sleeve 4 and the outer sleeve 3 are located at the first end of the shielding hose 1. One end of the inner sleeve 4 is located on the outer periphery of the shielding hose 1 and is fitted around the outer periphery of the wire harness. The outer sleeve 3 is fitted around the outer periphery of the shielding hose 1. The inner sleeve 4 and the outer sleeve 3 clamp the shielding hose 1. The inner sleeve 4 is provided with a first annular connecting piece made of metal, which is located outside the shielding hose 1 and surrounds the outer periphery of the wire harness. The end of the outer sleeve 3 is provided with a second annular connecting piece made of metal, which surrounds the outer periphery of the inner sleeve 4. The first and second annular connecting pieces are stacked together. The connecting nut 2 is sleeved on the outer circumference of the outer bushing 3. The connecting nut 2 and the tail accessory 8 are threadedly connected to fix the tail accessory 8 to the first end. The connecting nut 2 is provided with a clamping ring 21, which is used to press the first and second annular connecting pieces against the end face of the tail accessory 8. One end of the connecting sleeve 7 is detachably fixed to the second end of the shielded flexible tube 1. The connecting sleeve 7 is used for threaded connection with the equipment outlet.

[0023] The tail accessory 8 of this application eliminates the commonly used tail clip or sleeve structure. It is connected to the connecting nut 2 via the inner bushing 4 and the outer bushing 3. A sealing gasket is installed between the second annular connecting piece and the clamping ring 21 of the connecting nut 2 to increase sealing and reduce mechanical wear. Furthermore, the inner bushing 4 and the outer bushing 3 have ample dimensional margins, allowing for the replacement of different specifications of the tail accessory 8 by disassembling and assembling it, thus adapting to connectors of various structures. This reduces repetitive design work, simplifies the structure, and reduces the failure rate. The tail accessories 8 and connecting sleeves 7 at both ends of the shielded flexible hose 1 of this application are detachably connected to the shielded flexible hose 1, enabling quick cable installation and removal in confined spaces. Simultaneously, compared to traditional sheaths, it provides the necessary shielding capability against electromagnetic interference for aircraft wiring harnesses.

[0024] In this embodiment, the connecting nut 2, inner bushing 4, outer bushing 3, connecting sleeve 7, first annular connecting piece, and second annular connecting piece are made of stainless steel, and the edges are chamfered. The inner bushing 4 and the first annular connecting piece, as well as the outer bushing 3 and the second annular connecting piece, are connected by electric welding to ensure their reliability. The outer layer of the shielding hose 1 is made of stainless steel, and the inner layer of the shielding hose 1 is made of polytetrafluoroethylene, which can effectively protect the internal cable from wear.

[0025] The connecting sleeve 7 includes an insertion end 71 extending into the shielded flexible tube 1 and a threaded connecting sleeve 72 located outside the shielded flexible tube 1. The inner wall of the threaded connecting sleeve 72 is provided with internal threads, and the threaded connecting sleeve 72 is used for threaded connection with the outlet of the equipment. The insertion end 71 is fixed to the shielded flexible tube 1 by a cable tie wrapped around the outer periphery of the second end of the shielded flexible tube 1. The design of the connecting sleeve 7 in this application provides laying conditions for the outlet of equipment with limited installation space. In areas with limited space, it is often impossible to install connector sockets for wire harness plug docking, and the way the wire is slung out of the outlet cannot guarantee the reliability and sealing of the cable. This application can greatly increase the reliability of the wire harness by using a tail sleeve to thread a connection with the outlet of the equipment.

[0026] The insertion end 71 is secured by two steel cable ties 5, which are arranged sequentially along the length of the shielded hose 1. The cable tie 5 closer to the threaded connecting sleeve 72 presses the metal mesh of the shielded hose 1 against the outer periphery of the insertion end 71, so that the metal mesh at the second end of the shielded hose 1 contacts the insertion end 71. The inner plastic hose of the shielded hose 1, corresponding to the area of ​​the other cable tie 5, contacts the insertion end 71. This ensures the continuity of shielding between the sheath assembly at the second end of the shielded hose 1 and the connecting sleeve 7. In this embodiment, the outer periphery of the insertion end 71 is provided with several annular protrusions to increase the friction between the insertion end 71 and the shielded hose 1, thereby improving the stability of the connection between the connecting sleeve 7 and the shielded hose 1.

[0027] The inner diameter of the threaded connecting sleeve 72 is larger than the inner diameter of the insertion end 71. A sealing ring is located near the insertion end 71 within the threaded connecting sleeve 72, and is positioned on the side of the sealing ring opposite to the insertion end 71. This improves the sealing performance of the sheath assembly.

[0028] The sheath assembly of this application, while ensuring electromagnetic shielding performance and withstanding continuous mechanical stress and different environmental conditions, enables the rapid installation and removal of cables in confined spaces. This ensures that the internal cables can transmit reliable signals under harsh environments, continuous mechanical stress, electromagnetic interference, rapid installation and removal requirements, and other complex conditions.

[0029] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A landing gear wiring harness sheath assembly, characterized in that, It includes a shielded flexible tube (1), a connecting nut (2), a tail accessory (8), an inner bushing (4), an outer bushing (3), and a connecting sleeve (7). The shielded flexible tube (1) is fitted around the outer periphery of the wire harness. The connecting nut (2), the inner bushing (4), the outer bushing (3), and the connecting sleeve (7) are made of metal. The inner sleeve (4) and outer sleeve (3) are located at the first end of the shielding hose (1). One end of the inner sleeve (4) is located on the outer periphery of the shielding hose (1) and is fitted around the outer periphery of the wire harness. The outer sleeve (3) is fitted around the outer periphery of the shielding hose (1). The inner sleeve (4) and outer sleeve (3) clamp the shielding hose (1). The inner sleeve (4) is provided with a first annular connecting piece made of metal. The first annular connecting piece is located outside the shielding hose (1) and surrounds the outer periphery of the wire harness. The end of the outer sleeve (3) is provided with a metal... The second annular connecting piece is wrapped around the outer periphery of the inner bushing (4). The first annular connecting piece and the second annular connecting piece are stacked together. The connecting nut (2) is sleeved on the outer periphery of the outer bushing (3). The connecting nut (2) and the tail accessory (8) are threaded together to fix the tail accessory (8) on the first end. The connecting nut (2) is provided with a clamping ring (21). The clamping ring (21) is used to press the first annular connecting piece and the second annular connecting piece onto the end face of the tail accessory (8). One end of the connecting sleeve (7) is detachably fixed to the second end of the shielded flexible tube (1), and the connecting sleeve (7) is used for threaded connection with the equipment outlet.

2. The landing gear wiring harness sheath assembly according to claim 1, characterized in that, The connecting sleeve (7) includes an insertion end (71) that extends into the shielded hose (1) and a threaded connecting sleeve (72) located outside the shielded hose (1). The inner wall of the threaded connecting sleeve (72) is provided with internal threads, and the threaded connecting sleeve (72) is used to connect with the outlet of the equipment.

3. The landing gear wiring harness sheath assembly according to claim 2, characterized in that, The insertion end (71) is fixed to the shielding hose (1) by a cable tie that surrounds the second end of the shielding hose (1).

4. The landing gear wiring harness sheath assembly according to claim 3, characterized in that, The insertion end (71) is fixed by two steel cable ties (5). The two steel cable ties (5) are arranged sequentially along the length of the shielded hose (1). The steel cable tie (5) closer to the threaded connecting sleeve (72) presses the metal mesh of the shielded hose (1) to the outer periphery of the insertion end (71) so that the metal mesh at the second end of the shielded hose (1) contacts the insertion end (71). The inner plastic hose of the shielded hose (1) corresponding to the area of ​​the other steel cable tie (5) contacts the insertion end (71).

5. The landing gear wiring harness sheath assembly according to claim 2, characterized in that, The inner diameter of the threaded connecting sleeve (72) is larger than the inner diameter of the insertion end (71). The threaded connecting sleeve (72) has an annular platform at one end near the insertion end (71). The threaded connecting sleeve (72) has a sealing ring located on the side of the annular platform opposite to the insertion end (71).

6. The landing gear wiring harness sheath assembly according to claim 1, characterized in that, The inner layer of the shielded flexible tube (1) is polytetrafluoroethylene.

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