Reinforcing rib cable structure adaptive to shielding type tail attachment and manufacturing method of reinforcing rib cable structure

Abstract

A reinforcing rib cable structure adaptive to a shielding type tail attachment relates to the technical field of engine cables, comprises a connector, the shielding type tail attachment connected with the connector and a lead, and is characterized in that the lead is sleeved with a lead bundling material; reinforcing ribs are arranged on the outer side of the shielding type tail attachment; the reinforcing rib is fixedly connected with the shielding type tail attachment through the steel binding ring; reinforcing rib knots for preventing axial displacement of the reinforcing ribs are arranged at the two ends of the reinforcing ribs; the outer side of the reinforcing rib is sequentially sleeved with a metal integrated woven sheath and an aramid fiber integrated woven sheath. The length of the reinforcing ribs is smaller than that of the wires. The symmetrical reinforcing ribs are arranged on the outer side of the wire, and the wire is fixed on the shielding type tail attachment by using the steel binding ring, so that the stress when the cable is pulled is effectively dispersed, and the compression joint position of the wire and the contact body is prevented from losing efficacy. In addition, the metal sheath woven by nickel-plated copper wires and the outer sheath woven by aramid fibers are adopted, so that the electromagnetic shielding performance and the corrosion resistance of the cable are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of engine cables, and in particular to a reinforcing rib cable structure suitable for shielded tail attachment and a manufacturing method thereof. Background Art

[0002] With the development of multi-electrification and full electrification of aircraft electrical systems, the electrical wiring interconnection system (EWIS) has become more complex. At the same time, the miniaturization and dense layout of internal aircraft systems have led to a more complex electromagnetic environment. In order to ensure that the engine can work normally in a complex electromagnetic environment, the electromagnetic compatibility and mechanical strength of its cables must be strengthened.

[0003] When the engine cable is connected to the shielded tail, the ordinary shielded tail lacks an effective stress release mechanism. When the cable is pulled, the tension is directly transmitted to the wire, which can easily cause the wire and the contact body to fail. According to actual production experience, the tensile strength of the wire in this case is only about 90N, which is far from meeting the needs of high-strength application scenarios.

[0004] In addition, conventional engine cables are usually protected by a hybrid material integrated braided sheath. However, due to the low metal content of this sheath, the metal shielding wire braiding density is insufficient, which reduces the electromagnetic protection effect. In addition, the hybrid material sheath also has limitations in terms of mechanical strength and durability.

[0005] In summary, the existing engine cable design has obvious deficiencies in electromagnetic protection and mechanical strength, and it is difficult to meet the needs of the modern aviation industry for high-performance cables. Therefore, it is particularly necessary to develop a new type of reinforced rib cable structure suitable for shielded tail attachment. Summary of the invention

[0006] In order to remedy the above-mentioned deficiencies, the present invention provides a reinforcing rib cable structure suitable for shielded tail attachment and a manufacturing method thereof, aiming to significantly improve the tensile strength and electromagnetic protection performance of the engine cable.

[0007] The present invention is achieved through the following technical scheme: a reinforcing rib cable structure adapted for a shielded tail attachment, comprising a connector, a shielded tail attachment connected to the connector, and a conductor, characterized in that: a conductor bundling material is sheathed on the outside of the conductor; reinforcing ribs are arranged on the outside of the shielded tail attachment; the reinforcing ribs are connected and fixed to the shielded tail attachment through steel tying rings; reinforcing rib knots are provided at both ends of the reinforcing ribs to prevent axial displacement of the reinforcing ribs; a metal integrated braided sheath and an aramid integrated braided sheath are sequentially sheathed on the outside of the reinforcing ribs; the length of the reinforcing ribs is shorter than the length of the conductor.

[0008] Furthermore, the number of the reinforcing ribs is two, and they are symmetrically arranged on both sides of the blind tail attachment; the two reinforcing ribs are connected and fixed to the blind tail attachment via a steel tie ring.

[0009] Furthermore, the material of the metal integrated braided sheath is nickel-plated copper wire.

[0010] Furthermore, the material of the aramid integral braided sheath is meta-aromatic polyamide.

[0011] Furthermore, the preparation method thereof comprises the following steps: Step 1: Bundle multiple wires using wire bundling materials; Step 2: Install the shielded tail and connector to both ends of the bundled wires, and crimp the wires to the contacts to ensure a firm connection; Step 3: Set them symmetrically on both sides of the shielded tail attachment, use steel tie rings to fix the reinforcement ribs on the tail attachment, and tie reinforcement knots at both ends of the reinforcement ribs to prevent axial displacement; Step 4: Use an integrated braiding machine to braid the nickel-plated copper wire to the outside of the shielded tail to form a metal sheath; Step 5: Use an integrated braiding machine to braid the aramid fiber onto the outside of the metal sheath to form an aramid sheath.

[0012] Compared with the prior art, the present invention has the following advantages and features: The present invention effectively solves the shortcomings of the existing shielded tail-attached cables in terms of tensile strength by introducing reinforcing ribs and steel ring structures. Specifically, the setting of the reinforcing ribs ensures that when the cable is pulled, the tension is first transmitted to the reinforcing ribs rather than the wires, avoiding stress concentration at the crimping position between the wires and the contact body. This design significantly improves the tensile strength of the cable end and prevents the wires from breaking or loosening due to uneven force.

[0013] The present invention adopts a pure metal one-piece braided sheath and an aramid one-piece braided sheath, which significantly improves the electromagnetic protection performance of the cable. Specifically, the metal one-piece braided sheath is woven from nickel-plated copper wire, has a higher metal content and a tighter weaving density, effectively blocks external electromagnetic interference, and ensures the quality and stability of signal transmission. Compared with traditional mixed material sheaths, the metal sheath of the present invention shows a lower impedance value in the transfer impedance test, proving that it has a better electromagnetic shielding effect. The outer layer of the aramid one-piece braided sheath not only provides additional mechanical protection, but also enhances the corrosion resistance of the cable, ensuring that it can still maintain good electromagnetic protection capabilities in various harsh environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional structural schematic diagram of the present invention; Figure 2This is a test diagram of the electromagnetic shielding performance of the present invention.

[0015] The main parts serial number description in the figure: 1. Connector; 2. Shielded tail attachment; 3. Reinforcement knot; 4. Steel ring; 5. Reinforcement; 6. Metal one-piece braided sheath; 7. Aramid one-piece braided sheath; 8. Wire; 9. Wire bundling material;.

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. 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 protection scope required by the present invention. DETAILED DESCRIPTION

[0017] The following combination Figure 1-2 , the contents of the present invention are described in detail through specific embodiments. Example

[0018] The reinforcing rib cable structure adapted for a shielded tail attachment comprises a connector 1, a shielded tail attachment 2 connected to the connector, and a conductor 8, wherein: a conductor bundling material 9 is sheathed on the outer side of the conductor; a reinforcing rib 5 is arranged on the outer side of the shielded tail attachment; the reinforcing rib is connected and fixed to the shielded tail attachment through a steel tie ring 4; reinforcing rib knots 3 are arranged at both ends of the reinforcing rib to prevent the reinforcing rib from axial displacement; a metal integral braided sheath 6 and an aramid integral braided sheath 7 are sheathed in sequence on the outer side of the reinforcing rib; and the length of the reinforcing rib is shorter than the length of the conductor.

[0019] Preferably, there are two reinforcing ribs, which are symmetrically arranged on both sides of the blind tail attachment; the two reinforcing ribs are connected and fixed to the blind tail attachment via a steel tie ring.

[0020] Preferably, the material of the metal integral braided sheath is nickel-plated copper wire.

[0021] Preferably, the material of the aramid integral braided sheath is meta-aromatic polyamide.

[0022] The specific structure is as follows: Wire 8: Made of multiple strands of fine copper wires twisted together to ensure good conductivity and flexibility.

[0023] Wire bundling material 9: Fix multiple wires with bundling materials such as heat shrink tubing or binding tape to prevent the wires from spreading out during the weaving process.

[0024] Shielded tail 2: Installed at both ends of the wire for connecting the connector.

[0025] Reinforcement rib 5: It is made of aramid fiber binding rope material after weaving meta-aromatic polyamide fiber, with a width not exceeding 3.1mm, a thickness not exceeding 0.5mm, and a breaking strength of 22.66kg; it is symmetrically arranged on both sides of the shielded tail attachment, and its length is shorter than the conductor to ensure that when the cable is pulled, the reinforcement ribs are subjected to force first.

[0026] Steel tie ring 4: used to fix the reinforcement rib on the shielded tail attachment to ensure that the reinforcement rib and the tail attachment are tightly combined to prevent sliding.

[0027] Reinforcement knot 3: Tie knots at both ends of the reinforcement to prevent its axial displacement and ensure that the reinforcement remains stable when subjected to stress.

[0028] Metal integrated braided sheath 6: braided from nickel-plated copper wire, covering the outside of the reinforcement ribs to provide high-density electromagnetic shielding.

[0029] Aramid integrated braided sheath 7: Braided from para-aramid filaments, covering the outside of the metal sheath to provide additional mechanical protection and corrosion resistance.

[0030] Manufacturing process: Wire bundling: First, multiple wires are bundled using wire bundling materials to ensure that the wires will not spread out during the subsequent weaving process.

[0031] Install the shielded tail attachment and connector: Install the shielded tail attachment and connector to both ends of the bundled wires to ensure a firm and reliable connection.

[0032] Fix the reinforcement ribs: Place two reinforcement ribs symmetrically on both sides of the shielded tail attachment and fix them to the tail attachment through steel tie rings. Tie reinforcement rib knots at both ends of the reinforcement ribs to ensure that the reinforcement ribs will not shift axially. Tighten the reinforcement ribs so that the knots are close to the steel tie rings to complete the fixation of the shielded tail attachment and the reinforcement ribs at one end. Repeat the same process at the other end.

[0033] Braided Metal Sheath: Using an integrated braiding process, nickel-plated copper wire is braided to the outside of the shielded tail to form a metal integrated braided sheath. Ensure that the braiding density is high enough to provide excellent electromagnetic shielding effect.

[0034] Braided aramid sheath: The outer layer continues to use the one-piece braiding process to weave aramid fibers to the outside of the metal sheath to form an aramid one-piece braided sheath. The aramid sheath not only provides additional mechanical protection, but also enhances the corrosion resistance of the cable.

[0035] Final inspection and testing: After braiding, the cable is visually inspected to ensure that all parts are firmly connected and not loose. Then, tensile strength test and electromagnetic shielding performance test are carried out to verify whether the performance indicators of the cable meet the design requirements.

[0036] Test results: Tensile strength test: According to the actual test results, the cable with the reinforcing rib structure of the present invention has a wire crimping tensile strength of up to 222.29N, which is much higher than the 90N of the traditional shielded pigtail cable. This shows that the reinforcing rib structure effectively disperses the tensile force and significantly improves the tensile strength of the cable.

[0037] Electromagnetic shielding performance test: such as Figure 2 As shown, through the transfer impedance test, the cable of the present invention shows a lower impedance value, proving that it has a better electromagnetic shielding effect. Compared with the traditional mixed material sheath, the pure metal sheath has a higher weaving density and can more effectively block external electromagnetic interference, ensuring the quality and stability of signal transmission.

[0038] According to the requirements of high electromagnetic protection and tensile strength of engine cable products, the present invention discloses an engine cable using a reinforcing rib structure, which is suitable for the field of cable technology with high strength requirements and high electromagnetic protection requirements. A cable structure is proposed in which pure metal wire and pure aramid wire are woven in sequence outside the conductor to ensure that the cable has excellent electromagnetic shielding performance and corrosion resistance. A reinforcing rib structure suitable for shielded tail attachment is used to improve the tensile strength of the cable.

Claims

1. A reinforcing rib cable structure adapted for a shielded tail attachment, comprising a connector, a shielded tail attachment connected to the connector, and a conductor, characterized in that: A wire bundling material is sheathed on the outer side of the wire; Reinforcement ribs are arranged on the outside of the shielded tail attachment; the reinforcement ribs are connected and fixed to the shielded tail attachment through steel rings; reinforcement rib knots are arranged at both ends of the reinforcement ribs to prevent axial displacement of the reinforcement ribs; a metal integrated braided sheath and an aramid integrated braided sheath are sequentially mounted on the outside of the reinforcement ribs; the length of the reinforcement ribs is shorter than the length of the conductor.

2. The reinforcing rib cable structure adapted for shielded tail attachment according to claim 1, characterized in that: The number of the reinforcing ribs is two, and they are symmetrically arranged on both sides of the shielded tail attachment; The two reinforcing ribs are connected and fixed to the blind-type tail attachment through a steel tie ring.

3. The reinforcing rib cable structure suitable for shielded tail attachment according to claim 1, characterized in that: The material of the metal integrated braided sheath is nickel-plated copper wire.

4. The reinforcing rib cable structure suitable for shielded tail attachment according to claim 1, characterized in that: The material of the aramid integral braided sheath is meta-aromatic polyamide.

5. The reinforcing rib cable structure suitable for shielded tail attachment according to claim 1, wherein the manufacturing method comprises the following steps: Step 1: Bundle multiple wires using wire bundling materials; Step 2: Install the shielded tail and connector to both ends of the bundled wires, and crimp the wires to the contacts to ensure a firm connection; Step 3: Set them symmetrically on both sides of the shielded tail attachment, use steel tie rings to fix the reinforcement ribs on the tail attachment, and tie reinforcement knots at both ends of the reinforcement ribs to prevent axial displacement; Step 4: Use an integrated braiding machine to braid the nickel-plated copper wire to the outside of the shielded tail to form a metal sheath; Step 5: Use an integrated braiding machine to braid the aramid fiber onto the outside of the metal sheath to form an aramid sheath.

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