Vehicle-mounted line compatible with radio frequency signal and differential signal

Abstract

The utility model relates to the technical field of vehicle-mounted wires, in particular to a vehicle-mounted wire compatible with radio frequency signals and differential signals, which comprises two copper cores distributed in parallel, and an insulating layer, a longitudinal wrapping shielding layer and a braided shielding layer are sequentially sleeved on the outer sides of the two copper cores; wherein the two braided shielding layers are in contact with each other and are electrically conducted, and the outer sides of the two braided shielding layers are wrapped with a sheath layer; according to the technical scheme of the utility model, the two copper cores are arranged in parallel, the braided shielding layers are contacted and conducted, and then the sheath layer is used for fixation, so that through the structural design, the wire rod not only meets the requirements of radio frequency signal transmission, but also meets the requirements of differential signal transmission, such as radio frequency signal transmission, one of the copper cores is independently connected, and the wire rod is simple in structure and convenient to use. The two copper cores are combined, such as differential signal transmission, the differential signal can be transmitted after the two copper cores are combined, the overall structural design is simple, and the problems of layout complexity and weight of the current vehicle cable are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle-mounted cables, in particular to a vehicle-mounted cable compatible with radio frequency signals and differential signals. Background Art

[0002] As the degree of automobile intelligence and networking continues to increase, the demand for communication between various electronic devices such as various sensors and controllers in the car is growing. The design of vehicle-mounted wiring harnesses for transmission often uses separate cables to transmit different types of signals. For example, radio frequency signals are transmitted through coaxial cables, and a high-torsion vehicle-mounted coaxial cable disclosed in Chinese patent announcement number "CN219658415U" can be used for specific reference, as well as differential signals are transmitted through Ethernet cables, and a vehicle-mounted Ethernet transmission cable disclosed in Chinese patent announcement number "CN218299397U" can be used for specific reference.

[0003] However, due to the wiring design method of using two different signal transmission lines, more and more wiring harnesses will be used in the car, increasing the complexity and weight of the vehicle. Therefore, how to realize the design of vehicle wiring harnesses that share RF signals and differential signals becomes the key to solving the problem. Utility Model Content

[0004] The purpose of the utility model is to solve the above-mentioned shortcomings in the prior art and to propose a vehicle-mounted line compatible with radio frequency signals and differential signals.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] Design a vehicle-mounted cable compatible with radio frequency signals and differential signals, comprising two parallel copper cores, wherein an insulating layer, a longitudinal shielding layer and a braided shielding layer are sequentially sheathed on the outer sides of the two copper cores;

[0007] The two braided shielding layers are in contact with each other and electrically conductive, and a sheath layer is wrapped around the outer sides of the two braided shielding layers;

[0008] The copper core is a single bare copper conductor.

[0009] Furthermore, the insulating layer is a foamed PP layer sleeved on the outside of the copper core, and the cross-section of the foamed PP layer is a circular structure.

[0010] Furthermore, the longitudinal shielding layer is a double-sided aluminum foil layer, and the braided shielding layer is a tinned copper wire braided layer;

[0011] Wherein, the double-sided aluminum foil layer is attached parallel to the outer side of the insulating layer.

[0012] Furthermore, the double-sided aluminum foil layer 100% wraps the insulating layer, and the braiding coverage of the tinned copper wire braided layer is not less than 95%.

[0013] Furthermore, the sheath layer is a flame-retardant PVC layer with a temperature resistance of -40-105°C and a hardness of 90A, which is used to fix and protect the overall structure to form a complete wire.

[0014] Furthermore, the cross section of the sheath layer is an elliptical structure.

[0015] The utility model proposes a vehicle-mounted cable that is compatible with radio frequency signals and differential signals, and its beneficial effects are: in the utility model, two copper cores are placed in parallel, and the braided shielding layer is contacted and conducted, and then fixed by a sheath layer. Through this structural design, the wire material meets both the requirements of radio frequency signal transmission and the requirements of differential signal transmission. For example, for transmitting radio frequency signals, one of the copper cores can be connected separately. For transmitting differential signals, the two copper cores can be combined to transmit the differential signal. The overall structural design is simple, and the problems of complexity and weight of current vehicle cable layout are effectively solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model provides a structural schematic diagram of a vehicle-mounted line compatible with radio frequency signals and differential signals.

[0017] In the figure: 1. Copper core; 2. Insulation layer; 3. Longitudinal shielding layer; 4. Braided shielding layer; 5. Sheath layer. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] Reference Figure 1 An embodiment of the utility model discloses a vehicle-mounted cable compatible with radio frequency signals and differential signals. Specifically, the vehicle-mounted cable comprises two copper cores 1 distributed in parallel, and an insulating layer 2, a longitudinal shielding layer 3 and a braided shielding layer 4 are sequentially sheathed on the outer sides of the two copper cores 1;

[0020] The two braided shielding layers 4 are in contact with each other and electrically conductive, and a sheath layer 5 is wrapped around the outer sides of the two braided shielding layers 4;

[0021] The copper core 1 is a single bare copper conductor. Referring to ISO19642-11 standard, the copper core 1 adopts a single bare copper conductor. The vehicle-mounted wire is fixedly laid, and there are no special requirements for the softness and bending resistance of the wire. The use of a single conductor can reduce the core wire diameter. The surface of the single conductor is relatively flat and smooth, and the attenuation performance affected by the skin effect is better.

[0022] In some embodiments, the insulating layer 2 in the utility model is a foamed PP layer sleeved on the outside of the copper core 1. The cross-section of the foamed PP layer is a circular structure. The PP material has good temperature resistance and can meet the requirements of -40-105°C. At the same time, the PP material is cheap and is an ideal material for insulation of this type of core wire.

[0023] On the basis of the above-mentioned embodiment, the longitudinal shielding layer 3 in the utility model is a double-sided aluminum foil layer, and the braided shielding layer 4 is a tinned copper wire braided layer;

[0024] The double-sided aluminum foil layer is attached parallel to the outer side of the insulating layer 2 .

[0025] Specifically, during production, the longitudinal wrapping and weaving of the double-sided aluminum foil are completed simultaneously, and the double-sided aluminum foil passes through the mold of the weaving equipment and is attached in parallel to the outside of the coaxial core wire.

[0026] Furthermore, the double-sided aluminum foil layer 100% wraps the insulating layer 2. During production, it is ensured that the aluminum foil layer cannot be wrinkled and 100% completely wraps the core wire. In this way, the standing wave ratio of the coaxial cable is better, which is more conducive to stable signal transmission. Secondly, the weaving coverage rate of the tinned copper wire braided layer is not less than 95%. The higher weaving density can shield signal interference and provide the wire EM I performance. At the same time, the copper wire weaving can protect the internal core wire and improve the wire's resistance to external forces.

[0027] In some embodiments, the sheath layer 5 of the present invention is a flame-retardant PVC layer with a temperature resistance of -40-105°C and a hardness of 90A, which is used to fix and protect the overall structure to form a complete wire.

[0028] In addition, in the embodiment of the utility model, the cross-section of the sheath layer 5 is an elliptical structure. The elliptical structure design can reduce the friction of the sheath layer 5 during use, reduce the overall weight, and improve applicability.

[0029] In summary, the utility model adopts a technical solution of placing two copper cores 1 in parallel, contacting and conducting the braided shielding layer 4, and then fixing it through the sheath layer 5. Through this structural design, the wire meets both the requirements of RF signal transmission and the requirements of differential signal transmission. For example, to transmit RF signals, one of the copper cores 1 can be connected separately. For example, to transmit differential signals, the two copper cores 1 can be combined to transmit differential signals. The overall structural design is simple, which effectively solves the problems of complexity and weight of current vehicle cable layout.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A vehicle-mounted cable compatible with radio frequency signals and differential signals, comprising two copper cores (1) arranged in parallel, characterized in that: An insulating layer (2), a longitudinal shielding layer (3) and a braided shielding layer (4) are sequentially sheathed on the outer sides of the two copper cores (1); The two braided shielding layers (4) are in contact with each other and are electrically conductive, and a sheath layer (5) is wrapped around the outer sides of the two braided shielding layers (4); The copper core (1) is a single bare copper conductor.

2. The vehicle-mounted cable compatible with radio frequency signals and differential signals according to claim 1, characterized in that: The insulating layer (2) is a foamed PP layer sleeved on the outside of the copper core (1), and the cross-section of the foamed PP layer is a circular structure.

3. The vehicle-mounted cable compatible with radio frequency signals and differential signals according to claim 1, characterized in that: The longitudinal shielding layer (3) is a double-sided aluminum foil layer, and the braided shielding layer (4) is a tinned copper wire braided layer; Wherein, the double-sided aluminum foil layer is attached parallel to the outer side of the insulating layer (2).

4. The vehicle-mounted cable compatible with radio frequency signals and differential signals according to claim 3, characterized in that: The double-sided aluminum foil layer 100% wraps the insulating layer (2), and the braiding coverage of the tinned copper wire braided layer is not less than 95%.

5. The vehicle-mounted cable compatible with radio frequency signals and differential signals according to claim 1, characterized in that: The sheath layer (5) is a flame-retardant PVC layer with a temperature resistance of -40-105°C and a hardness of 90A, and is used to fix and protect the overall structure to form a complete wire.

6. The vehicle-mounted cable compatible with radio frequency signals and differential signals according to claim 5, characterized in that: The cross section of the sheath layer (5) is an elliptical structure.

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