Light-weight and low-cost coaxial cable for vehicle

Abstract

The utility model relates to a lightweight low-cost coaxial cable for a vehicle, which sequentially comprises a wire core, a metal wrapping tape, a shielding layer and a sheath layer from inside to outside, and the metal wrapping tape is a layer of double-sided metal wrapping tape wrapped outside the wire core; the shielding layer is formed by weaving an aluminum coating basalt fiber shielding weaving layer on the surface of the metal wrapping tape, and 24 ingots and 10 aluminum coating basalt fiber conductors with the monofilament diameter being 0.23 [mu] m are adopted to be evenly attached to the surface of the metal wrapping tape. The wire core is composed of a 7 / 0.26 bare copper conductor and a foaming PP insulating layer, and the outer diameter of the wire core is 2.02-2.18 mm. And the sheath layer is made of PVC (Polyvinyl Chloride). The utility model provides a vehicle coaxial cable which is light in weight and low in cost.

Description

Technical Field

[0001] This utility model belongs to the technical field of cables, specifically referring to a lightweight and low-cost automotive coaxial cable. Background Technology

[0002] Coaxial cables consist of a center conductor, an insulating dielectric layer, a metallic sheath, a braided shield, and an outer sheath. The center conductor and the braided shield together form the current transmission loop. Due to their high-frequency signal transmission capabilities and interference resistance, coaxial cables are widely used for video signal transmission in dashcams, vehicle surveillance cameras, and GPS navigation systems, ensuring image stability and positioning accuracy.

[0003] With the rapid development of new energy vehicles, the demand for autonomous driving and advanced driver assistance systems (ADAS) has surged, enabling intelligent driving functions through the integration of onboard radar, lidar, and cameras. Coaxial cables provide high-speed, low-latency signal transmission capabilities for real-time communication between vehicles, supporting the collaborative operation of autonomous driving functions. Simultaneously, coaxial cables can transmit high-quality audio and video signals, supporting interconnected functions such as in-vehicle audio systems and video playback, enhancing the intelligent driving experience for passengers.

[0004] As modern cars integrate assisted driving and intelligent assistance systems, the demand for intelligent cockpits is increasing, reflected in the growing integration of human-machine interaction; this has led to the wider application of automotive coaxial cables. Traditional automotive coaxial cables typically use a metal-clad outer conductor with tinned copper braided wire. While this structure provides excellent shielding, the rapidly rising price of copper has significantly increased the cost of coaxial cables, posing a greater challenge in cost reduction. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a lightweight and low-cost automotive coaxial cable.

[0006] This utility model is implemented as follows:

[0007] A lightweight, low-cost automotive coaxial cable, comprising, from the inside out: a conductor, a metal tape, a shielding layer, and a sheath layer.

[0008] The metal wrapping tape is a double-sided metal wrapping tape covering the outside of the wire core;

[0009] The shielding layer is an aluminum-coated basalt fiber shielding braid woven layer woven onto the surface of the metal strap.

[0010] The core is composed of a bare copper conductor and an insulating layer surrounding it;

[0011] Furthermore, the aluminum-coated basalt fiber shielding braided layer is made by uniformly attaching 24 spindles of 10 single-filament aluminum-coated basalt fiber conductors with a diameter of 0.23μm to the surface of the metal strap.

[0012] Furthermore, the wire core is a wire core with an outer diameter of 2.02~2.18mm, consisting of a 7 / 0.26 bare copper conductor and a foamed PP insulation layer.

[0013] Furthermore, the sheath layer is made of PVC.

[0014] The advantages of this utility model are:

[0015] 1. Lighter cable:

[0016] Traditional automotive coaxial data cables use a metal tape and tinned copper braided shielding structure to increase shielding effectiveness. The density of a single 0.10TD tinned copper wire is 8.89 g / cm³. 3 The density of AluCoat aluminum-coated basalt fiber shielding is 2.7 g / cm³. 3 At the same weaving density, this utility model uses an AluCoat aluminum-coated basalt fiber shielding structure to achieve the same shielding effect as tin-plated copper shielding, which can reduce the weight of copper by 80%, making the wire lighter and in line with the development path of lightweighting in new energy vehicles.

[0017] 2. Reduce costs:

[0018] The coaxial cable structure of this utility model adopts AluCoat aluminum-coated basalt fiber shielding, which reduces the cost by 87.5%, thereby achieving a more competitive cost advantage.

[0019] 3. Improved the structural stability of the cable:

[0020] This utility model, AluCoat aluminum-coated basalt fiber shielding, has high tensile strength compared to tin-plated copper braided wire, increasing the overall tensile strength of the cable. At the same time, it adopts a PVC sheath, which can protect the cable from physical damage and chemical corrosion, increasing the stability and reliability of the cable.

[0021] In summary, the shielding structure of this utility model coaxial cable replaces the original tin-plated copper braided structure with AluCoat aluminum-coated basalt fiber shielding, and is combined with metal wrapping tape and extruded PVC sheathing and other technical means to improve signal transmission quality and meet the advantages of USCAR17. Attached Figure Description

[0022] The present invention will now be further described with reference to the accompanying drawings and embodiments.

[0023] Figure 1This is a cross-sectional schematic diagram of the coaxial cable of this utility model.

[0024] Figure 2 This is a structural diagram of the tinned copper wire braided shielding layer in a traditional coaxial cable.

[0025] Figure 3 This is a structural diagram of the AluCoat aluminum-coated basalt fiber braided shielding layer of this utility model. Detailed Implementation

[0026] like Figure 1 As shown, a lightweight and low-cost automotive coaxial cable comprises, from the inside out: a conductor 1, a metal wrapping tape 2, a shielding layer 3, and a sheath layer 4.

[0027] Core 1 is composed of a bare copper conductor and an outer insulation layer. Specifically, it is a core with an outer diameter of 2.02~2.18mm, consisting of a 7 / 0.26 bare copper conductor 11 and a foamed PP insulation layer 12.

[0028] Metal wrapping 2 is a double-sided metal wrapping layer covering the outside of the wire core 1;

[0029] The shielding layer 3 is an aluminum-coated basalt fiber shielding braided layer woven onto the surface of the metal wrapping tape 2. It is made of 24 spindles of 10 single filaments with a diameter of 0.23μm aluminum-coated basalt fiber conductors that are evenly attached to the surface of the metal wrapping tape 2.

[0030] The sheath layer is made of PVC material.

[0031] Traditional automotive coaxial data cables use metal tape and tinned copper braided shielding (such as...). Figure 2 As shown), this is used to increase shielding effectiveness. The density of a single 0.10TD tin-plated copper wire is 8.89 g / cm³. 3 The density of AluCoat aluminum-coated basalt fiber shielding is 2.7 g / cm³. 3 At the same weaving density, this utility model uses an AluCoat aluminum-coated basalt fiber shielding structure (such as...). Figure 3As shown, this invention provides the same shielding effect as tinned copper shielding, while reducing copper weight by 80%, making the cable lighter and aligning with the lightweight development path of new energy vehicles. This invention proposes a novel shielding structure for automotive coaxial cables, using ALucoat aluminum-coated basalt fiber material to replace the original tinned copper braided wire. Taking a low-density shielding layer woven with ultra-fine fibers with a single filament diameter of 0.23μm as an example, it reduces weight by 80% compared to traditional copper braided mesh, resulting in a lightweight and lower-cost automotive coaxial cable with a higher performance EMC shielding efficiency. It features high tensile strength, a PVC sheath for protection, and meets the relevant specifications for wires in the USCAR17 standard, increasing the stability of the coaxial cable and ensuring stable and reliable signal transmission.

[0032] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A lightweight, low-cost automotive coaxial cable, comprising, from the inside out: The core, metal wrapping tape, shielding layer, and sheath layer are characterized by: The metal wrapping tape is a double-sided metal wrapping tape covering the outside of the wire core; The shielding layer is an aluminum-coated basalt fiber shielding braid woven layer woven onto the surface of the metal strap. The core is composed of a bare copper conductor and an insulating layer surrounding it; The sheath layer is made of PVC.

2. The lightweight, low-cost automotive coaxial cable as described in claim 1, characterized in that: The aluminum-coated basalt fiber shielding braided layer uses 24 spindles of 10 single-filament aluminum-coated basalt fiber conductors with a diameter of 0.23μm, which are uniformly bonded to the surface of the metal wrapping tape.

3. The lightweight, low-cost automotive coaxial cable as described in claim 1, characterized in that: The core is a wire with an outer diameter of 2.02 to 2.18 mm, consisting of a 7 / 0.26 bare copper conductor and a foamed PP insulation layer.

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