Wire harness structure for connecting flywheel shaft of undercarriage

Abstract

The invention discloses a wire harness structure for connecting a flywheel shaft of an undercarriage, belongs to the technical field of electrical connection systems, and aims to solve the problems of insufficient durability and reliability and inconvenience in installation of a wire harness in a complex environment in the prior art. The wire harness structure comprises a switching accessory connected with a flywheel shaft, a cable and a connector. The switching accessory is composed of a pipe base in threaded connection with the flywheel shaft and a sealing tail, wherein the pipe base is provided with a waterproof groove and a sealing ring is arranged in the waterproof groove to enhance the waterproof performance. The sealing tail comprises a connecting nut, a bent pipe, a tail connector and a wire limiting assembly, and good sealing performance and wire fixation are ensured. The cable adopts a multi-layer protection design of a corrugated pipe, a wave-proof sleeve, a heat shrink tube and the like, and effectively resists the influence of an external environment. In addition, annular grooves with friction lines are formed in the tail connector and the connector tail attachment connector, and the overall fixing stability is enhanced through cooperation of the annular grooves with the friction lines and the steel cable tie.

Description

Technical Field

[0001] The present application relates to the technical field of electrical connection systems, and in particular to a wiring harness structure for connecting a landing gear flywheel shaft. Background Art

[0002] Conventional technology primarily relies on wiring harnesses for the installation, wiring, signal transmission, and electrical interconnection of aircraft landing gear systems. These harnesses consist of adapters connected to the flywheel shaft, cables connected to the adapters, and connectors connected to the cables. These harnesses are responsible for performing critical functions such as opening and closing the landing gear doors, retracting and extending the landing gear, controlling lighting and brakes, and monitoring temperature and speed. However, traditional harness designs present several limitations and challenges.

[0003] First, traditional wiring harnesses are often directly exposed to the external environment and are susceptible to a variety of complex environmental factors, including sand and dust, rain, acidic atmospheres, acidic salt spray, mold invasion, and solar radiation, resulting in reduced durability and reliability. Second, existing wiring harnesses often lack effective protection to prevent damage to the wires due to vibration or mechanical stress. Furthermore, existing flywheel shafts and adapter accessories are difficult to install.

[0004] In view of this, the market urgently needs a new type of wiring harness structure, which can not only provide excellent environmental adaptability and mechanical protection performance, but also simplify the installation process and improve work efficiency. Summary of the Invention

[0005] In order to remedy the above-mentioned deficiencies, the present invention provides a wiring harness structure for connecting a landing gear flywheel shaft, which solves the deficiencies in the prior art through a series of innovative designs, thereby providing reliable guarantees for the stable operation of the aircraft landing gear system.

[0006] The present invention is achieved through the following technical solution: a wiring harness structure for connecting a landing gear flywheel shaft, comprising an adapter connected to the flywheel shaft, a cable connected to the adapter, and a connector connected to the cable. The technical key points are: The adapter accessory includes a pipe seat threadedly connected to the flywheel shaft and a sealing tail threadedly connected to the pipe seat; The connection end between the pipe seat and the flywheel shaft is provided with a waterproof groove; a sealing ring is provided in the waterproof groove; The sealing tail portion includes a connecting nut threadedly connected to the tube seat, a bent pipe connected to the connecting nut, a tail joint connected to the bent pipe, and a wire limiting assembly arranged on the inner side of the bent pipe; the connecting nut is sleeved on the end of the bent pipe and connected to the connecting nut via a retaining ring; the wire limiting assembly includes an annular ring, a sealing body pressure ring, a sealing body, and a retaining ring arranged in sequence; the sealing body pressure ring is provided with a groove for accommodating the annular ring; The cable includes a conductor, a corrugated tube, a wave-proof sleeve, a heat shrink tube, a molded sleeve, and a steel tie for binding the corrugated tube, the wave-proof sleeve, and the heat shrink tube. Two annular grooves are circumferentially spaced apart on the tail joint and the tail attachment joint of the connector; and wavy friction lines are provided inside the annular grooves.

[0007] Furthermore, the bent pipe is sleeved on the end of the tail joint and is fixedly connected to the tail joint by a set screw.

[0008] Furthermore, the connecting nut is threadedly connected to the pipe seat and then fixedly connected to the pipe seat by a set screw.

[0009] Beneficial effects and features of the present invention: The present invention adopts a design including waterproof grooves and sealing rings, multi-layer protection (corrugated pipes, wave-proof sleeves, heat shrink tubing, etc.), which can effectively resist the influence of various complex environmental factors such as sand and dust, rain, acidic atmosphere, acidic salt spray, mold invasion and solar radiation; The flexible and impact-resistant PTFE bellows and the conductor position-limiting design effectively prevent damage to the conductors due to vibration or mechanical stress. Furthermore, the wavy friction grooves within the annular groove, combined with the steel cable tie, further strengthen the connection between the cable and the tail connector.

[0010] The flywheel shaft, the tube seat and the seal tail are connected by threaded connections to facilitate quick installation, and the adapter accessories are further fixed by set screws to enhance the stability of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic diagram of the transfer accessory in the present invention; Figure 2 for Figure 1 A cross-sectional schematic diagram; Figure 3 It is a cross-sectional schematic diagram of the present invention in use.

[0012] The main parts serial number description in the figure is as follows: 1. Sealing ring; 2. Pipe seat; 3. Set screw; 4. Annular ring; 5. Connecting nut; 6. Sealing body pressure ring; 7. Circlip; 8. Sealing body; 9. Retaining ring; 10. Bend pipe; 12. Tail connector; 121. Annular groove; 122. Friction pattern; 13. Wire; 14. Bellows; 15. Wave-proof sleeve; 16. Heat shrink tubing; 17. Steel tie; 18. Molded sleeve; 19. Flywheel shaft.

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. The other drawings obtained are all within the scope of protection required by the present invention. DETAILED DESCRIPTION

[0014] The following combination Figure 1-3 , the contents of the present invention are described in detail through specific embodiments. Example

[0015] The wiring harness structure includes a transfer accessory connected to the flywheel shaft, a cable connected to the transfer accessory, and a connector connected to the cable, wherein: The adapter accessory includes a pipe seat 2 threadedly connected to the flywheel shaft and a sealing tail threadedly connected to the pipe seat. The threaded connection design is more convenient for installation.

[0016] A waterproof groove is provided at the connection end between the tube seat and the flywheel shaft; a sealing ring 1 is provided in the waterproof groove, and the waterproof groove and the sealing ring realize the waterproof performance of the connection between the tube seat and the flywheel shaft.

[0017] The sealing tail includes a connecting nut 5 threadedly connected to the tube seat, a bent pipe 10 connected to the connecting nut, a tail joint 12 connected to the bent pipe, and a wire limiting assembly arranged on the inner side of the bent pipe; the connecting nut is sleeved on the end of the bent pipe and connected to the connecting nut through a retaining ring 7, and the connecting nut can rotate on the bent pipe; the wire limiting assembly includes an annular ring 4, a sealing body pressure ring 6, a sealing body 8 and a retaining ring 9 arranged in sequence; a groove for placing the annular ring is provided on the sealing body pressure ring, and the groove cooperates with the annular ring to achieve sealing between the tube seat and the sealing body pressure ring; when the tube seat and the connecting nut are threadedly connected, the sealing body will be further squeezed to reduce the inner diameter of the sealing body, and at the same time, the inner diameter of the sealing body will tighten the wire, thereby achieving the function of limiting the wire and avoiding damage caused by friction between the wire and the adapter accessories during vibration.

[0018] The cable includes a conductor 13, a corrugated tube 14, a wave-proof sleeve 15, a heat shrink tube 16, a molded sleeve 18, which are sequentially sleeved on the outside of the conductor, and a steel tie 17 for binding the corrugated tube, wave-proof sleeve, and heat shrink tube; the corrugated tube adopts a polytetrafluoroethylene corrugated tube, which has good flexibility and impact resistance, and can resist external vibration, impact, bird strikes, tire explosions and other mechanical stresses without affecting the bending and wiring of the conductor. The wave-proof sleeve is made of copper and is used for electromagnetic protection and to conduct interference current. The heat shrink tube provides better sealing protection, resists mold growth and the intrusion of salt spray and moisture. The molded sleeve seals and protects the end of the protective sleeve and releases mechanical stress. The steel tie is used for the corrugated tube, wave-proof sleeve, and heat shrink tube to connect and fix the corrugated tube, wave-proof sleeve, heat shrink tube to the tail connector and the tail connector of the connector.

[0019] To strengthen the connection between the cable and the tail connector and connector's tail fitting, two annular grooves 121 are circumferentially spaced apart on the tail connector and connector's tail fitting. Wave-shaped friction grooves 122 are located within the annular grooves. The friction grooves in the annular grooves, combined with the steel cable tie, provide a more stable connection between the corrugated tube, surge protector, and heat shrink tubing and the tail connector and connector's tail fitting.

[0020] In order to further fix the elbow and the tail joint, the elbow is sleeved on the end of the tail joint and fixedly connected to the tail joint by a set screw 3, which is directly drilled into the tail joint.

[0021] In order to further fix the pipe seat and the connecting nut, the connecting nut is threadedly connected to the pipe seat and then fixedly connected to the pipe seat by a set screw 3, which is directly drilled into the pipe seat.

[0022] The installation process of the present invention: First, assemble the sealing tail, cable, and connector. Then, secure the tube holder to the flywheel shaft. Next, insert the wires in the cable into the tube holder, and thread the connecting nut into the tube holder. Finally, use a set screw to drive the connecting nut and the inside of the tube holder to further secure the entire structure.

Claims

1. A wiring harness structure for connecting a landing gear flywheel shaft, comprising an adapter connected to the flywheel shaft, a cable connected to the adapter, and a connector connected to the cable, characterized in that: The adapter accessory includes a pipe seat threadedly connected to the flywheel shaft and a sealing tail threadedly connected to the pipe seat; The connection end between the pipe seat and the flywheel shaft is provided with a waterproof groove; a sealing ring is provided in the waterproof groove; The sealing tail portion includes a connecting nut threadedly connected to the tube seat, a bent pipe connected to the connecting nut, a tail joint connected to the bent pipe, and a wire limiting assembly arranged on the inner side of the bent pipe; the connecting nut is sleeved on the end of the bent pipe and connected to the connecting nut via a retaining ring; the wire limiting assembly includes an annular ring, a sealing body pressure ring, a sealing body, and a retaining ring arranged in sequence; the sealing body pressure ring is provided with a groove for accommodating the annular ring; The cable includes a conductor, a corrugated tube, a wave-proof sleeve, a heat shrink tube, a molded sleeve, and a steel tie for binding the corrugated tube, the wave-proof sleeve, and the heat shrink tube. Two annular grooves are circumferentially spaced apart on the tail joint and the tail attachment joint of the connector; and wavy friction lines are provided inside the annular grooves.

2. The wiring harness bifurcation structure according to claim 1, characterized in that: The bent pipe is sleeved on the end of the tail joint and is fixedly connected to the tail joint by a set screw.

3. The wiring harness bifurcation structure according to claim 1, characterized in that: The connecting nut is threadedly connected to the pipe seat and fixedly connected to the pipe seat by a set screw.

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