Vehicle-mounted coaxial line resistant to dynamic use
By using a central conductor wrapped with fluoroplastic monofilaments and covered with an insulation layer, an aluminum foil layer, and an outer sheath in the vehicle-mounted coaxial cable, the problems of open circuit and signal leakage of the coaxial cable under dynamic conditions are solved, achieving high strength and stable signal performance in dynamic use.
Patent Information
- Application Number
- CN202520133005.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-01-21
AI Technical Summary
Existing vehicle-mounted coaxial cables suffer from open circuits, rubber cracking, and signal loss in dynamic scenarios, failing to meet the reliability and durability requirements of complex dynamic environments.
The process involves spirally winding fluoroplastic monofilaments around a central conductor, and then sequentially covering the outer periphery with an insulation layer, an aluminum foil layer, a braided layer, and an outer sheath. By creating a gap between the central conductor and the insulation layer, the equivalent dielectric constant of the insulation is reduced. Furthermore, multiple layers of PET are used in the aluminum foil layer to protect the aluminum material layer and prevent signal leakage.
It improves the torsional strength and signal transmission reliability of the coaxial cable, ensuring no signal leakage and meeting the needs of dynamic environments.
Smart Images
Figure CN223911462U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of coaxial lines, in particular to a vehicle-mounted coaxial line resistant to dynamic use. BACKGROUND
[0002] The vehicle-mounted coaxial line is generally applied to a static wiring scene in a vehicle. In recent years, with the rapid development of the vehicle-mounted coaxial line, the application of the coaxial product is no longer limited to the static wiring scene. The insulating layer of the conventional coaxial line adopts a foaming structure, and problems such as disconnection, rubber cracking and SI loss exist in dynamic scene operation. In the dynamic scene application, as the application environment becomes more and more complex, higher requirements are put forward for the reliability and durability of the coaxial line. Therefore, a vehicle-mounted coaxial line resistant to dynamic use is needed to meet the use requirements in the dynamic environment. CONTENT OF THE UTILITY MODEL
[0003] In order to solve the above technical problems, the application provides a vehicle-mounted coaxial line resistant to dynamic use, which comprises a center conductor, fluoroplastic monofilaments spirally wound on the outer periphery of the center conductor, and an insulating layer, an aluminum foil layer, a braided layer and an outer sheath layer successively coated on the outer periphery.
[0004] Preferably, the center conductor is composed of 7 strands of 0.254 mm conductors.
[0005] Preferably, the fluoroplastic monofilaments are wound on the center conductor with a winding pitch of 15 mm.
[0006] Preferably, the insulating layer is extruded on the outer periphery of the center conductor and the fluoroplastic monofilaments in the form of an extruded tube.
[0007] Preferably, the braided layer is composed of a tin-copper alloy.
[0008] Preferably, the material of the outer sheath layer is TPE material.
[0009] Preferably, the insulating layer is a solid PP insulating layer.
[0010] From the above, the application can obtain the following beneficial effects: the fluoroplastic monofilament is spirally wound outside the center conductor, and then the insulating layer, the aluminum foil layer, the braided layer and the outer covering layer are sequentially coated outside the fluoroplastic monofilament, the fluoroplastic monofilament is spirally wound outside the center conductor, and then the insulating layer is extruded outside the fluoroplastic monofilament, thereby forming a gap between the center conductor and the insulating layer, reducing the equivalent dielectric constant of the insulating layer, and improving the torsional strength of the coaxial cable, meeting the use requirements of dynamic environment resistance. The aluminum foil layer comprises a first aluminum material layer, a first PET layer, a second aluminum material layer and a second PET layer from inside to outside. After the second aluminum material layer between the two PET layers is subjected to friction between the insulating layer and the braided layer in the torsional motion, the second aluminum material layer between the two PET layers blocks signal leakage, thereby ensuring that the signal does not leak. BRIEF DESCRIPTION OF DRAWINGS
[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application or the prior art. Obviously, the drawings in the following description are only a part of the embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.
[0012] Figure 1 The schematic diagram of the vehicle-mounted coaxial cable for dynamic use in the embodiments of the present application DETAILED DESCRIPTION
[0013] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0014] EMBODIMENT
[0015] In order to solve the above technical problems, the present embodiment provides a vehicle-mounted coaxial cable for dynamic use, which comprises a center conductor, an insulating layer, an aluminum foil layer, a braided layer and an outer covering layer. Figure 1As shown, it comprises a center conductor 10, fluoroplastic monofilament 20 spirally wound on the outer periphery of the center conductor 10, and an insulating layer 30, an aluminum foil layer 40, a braided layer 50 and an outer sheath layer 60 successively coated on the outer periphery. By spirally winding the fluoroplastic monofilament 20 on the outer periphery of the center conductor 10, and then extruding the insulating layer 30 on the outer periphery of the fluoroplastic monofilament 20, a gap is formed between the center conductor 10 and the insulating layer 30, which reduces the dielectric constant of the insulating layer and improves the torsional strength of the coaxial cable, thereby meeting the use requirements in dynamic environment. The aluminum foil layer 40 comprises a first aluminum material layer 41, a first PET layer 42, a second aluminum material layer 43 and a second PET layer 44 successively from inside to outside. The second aluminum material layer 43 between the two PET layers can block signal leakage after being rubbed by the insulating layer 30 and the braided layer 50 in the torsional movement, so that the signal is not leaked.
[0016] Further, compared with the existing coaxial cable structure adopting a foamed insulating layer, the present embodiment adopts the fluoroplastic monofilament 20 to wrap the center conductor 10 and then extrudes a solid insulating layer 30, thereby forming a gap between the center conductor 10 and the insulating layer 30, which also reduces the dielectric constant of the insulating layer like the foamed insulating layer.
[0017] The existing aluminum foil layer 40 adopts a single-layer aluminum foil. In the torsional process of the cable in a dynamic environment, the single-layer aluminum foil is rubbed between the insulating layer 30 and the braided layer 50, which causes the aluminum foil to be damaged and thus leads to signal leakage. Therefore, the aluminum foil layer 40 of the present embodiment comprises a first aluminum material layer 41, a first PET layer 42, a second aluminum material layer 43 and a second PET layer 44 successively from inside to outside. In the torsional movement, the first PET layer 42 and the second PET layer 44 protect the second aluminum material layer 43 from being damaged in the dynamic movement, and the second aluminum material layer 43 between the two PET layers blocks signal leakage.
[0018] Further, the center conductor 10 is composed of 7 strands of 0.254 mm conductor. The fluoroplastic monofilament 20 is wound on the center conductor 10 with a winding pitch of 15 mm. The insulating layer 30 is extruded on the outer periphery of the center conductor 10 and the fluoroplastic monofilament 20 by means of pipe extrusion.
[0019] Further, the braided layer 50 is composed of tin-copper alloy, which has higher strength and better durability, and can avoid breakage of the braided layer in a long-term torsional working environment.
[0020] Further, the material of the outer sheath layer 60 is TPE material. The outer sheath layer 60 of the embodiment selects TPE material of 125℃ grade. The conventional PVC is rubbed by the braided layer 50 in high and low temperature endurance movement, and is prone to break after torsion endurance movement. The elasticity of the TPE material is better, and the fatigue resistance is better than that of the PVC. Through the coaxial line structure of the embodiment, the impedance return loss of the wire after endurance work meets the specification requirements, the attenuation change is less than or equal to 20%; the outer skin does not crack, and the withstand voltage is 1kV, 60s without breakdown.
[0021] In summary, the application scheme spirally winds fluoroplastic monofilament outside the center conductor, and then sequentially coats the insulating layer, the aluminum foil layer, the braided layer and the outer sheath layer outside the periphery. The fluoroplastic monofilament is spirally wound outside the center conductor, and then the insulating layer is extruded outside the fluoroplastic monofilament, thereby forming a gap between the center conductor and the insulating layer, reducing the equivalent dielectric constant of insulation, and improving the torsional strength of the coaxial line, meeting the use requirements of dynamic environment. The aluminum foil layer comprises a first aluminum material layer, a first PET layer, a second aluminum material layer and a second PET layer from inside to outside. The second aluminum material layer is between the two PET layers. After being rubbed by the insulating layer and the braided layer in the torsion movement, the second aluminum material layer between the two PET layers blocks signal leakage, thereby ensuring that the signal does not leak.
[0022] The above-described embodiments do not constitute a limitation on the protection scope of the technical solutions. Any modifications, equivalent replacements and improvements made within the spirit and principles of the above-described embodiments shall be included in the protection scope of the technical solutions.
Claims
1. A vehicle-mounted coaxial cable suitable for dynamic use, characterized in that: It includes a central conductor (10), a fluoroplastic monofilament (20) spirally wound around the outer periphery of the central conductor (10), and an insulating layer (30), an aluminum foil layer (40), a braided layer (50) and an outer sheath layer (60) sequentially covering the outer periphery. The aluminum foil layer (40) includes, from the inside to the outside, a first aluminum material layer (41), a first PET layer (42), a second aluminum material layer (43), and a second PET layer (44).
2. The vehicle-mounted coaxial cable resistant to dynamic use according to claim 1, characterized in that: The center conductor (10) is made of seven strands of 0.254 mm conductors twisted together.
3. The vehicle-mounted coaxial cable resistant to dynamic use according to claim 2, characterized in that: The fluoroplastic monofilament (20) is wound around the central conductor (10) with a pitch of 15 mm.
4. The vehicle-mounted coaxial cable resistant to dynamic use according to claim 1, characterized in that: The insulating layer (30) is extruded from the outer periphery of the central conductor (10) and the fluoroplastic monofilament (20) by extrusion.
5. The vehicle-mounted coaxial cable resistant to dynamic use according to claim 1, characterized in that: The braided layer (50) is woven from a tin-copper alloy.
6. The vehicle-mounted coaxial cable resistant to dynamic use according to claim 1, characterized in that: The outer sheath (60) is made of TPE material.
7. The vehicle-mounted coaxial cable resistant to dynamic use according to claim 1, characterized in that: The insulating layer (30) is a solid PP insulating layer.