Vehicle-mounted high-strength coaxial line

Abstract

The utility model discloses a vehicle-mounted high-strength coaxial line. The problems that an existing vehicle-mounted cable is weak in tensile strength and high in production cost are solved. The cable comprises a sheath. The conductor is used for signal transmission, the insulation group layer wraps the conductor, the insulation group layer comprises a first insulation layer, a second insulation layer and a third insulation layer, the second insulation layer is arranged between the first insulation layer and the third insulation layer, and the thickness of the second insulation layer is larger than the sum of the thickness of the first insulation layer and the thickness of the third insulation layer; the first shielding layer is sleeved outside the insulating group layer; and the second shielding layer is sleeved outside the first shielding layer, and the first shielding layer, the second shielding layer and the conductor are coaxially arranged. The tensile strength of the core wire is improved by arranging the insulating group layer, the transmission performance is improved, the requirement of using the cable in a high-vibration environment on an automobile is met, the anti-interference performance is improved by arranging the first shielding layer and the second shielding layer, and the video signal transmission reliability is improved.

Description

Technical Field

[0001] This utility model relates to a vehicle-mounted cable, specifically a vehicle-mounted high-strength coaxial cable. Background Technology

[0002] Cables are a general term for items such as optical cables and electrical cables. Cables have many uses, primarily for control installation, equipment connection, and power transmission, making them a common and indispensable part of daily life. Existing vehicle-mounted cables have a wide range of applications, such as video transmission. However, due to vehicle vibrations during driving, the stability of video signal transmission is affected. Furthermore, existing vehicle-mounted cables typically have a single-layer solid insulation layer, which is relatively thick and has high production costs. Utility Model Content

[0003] To address the problems of weak tensile strength and high production cost of existing vehicle-mounted cables in the background art, this utility model provides a high-strength vehicle-mounted coaxial cable.

[0004] The technical solution of this utility model is: a vehicle-mounted high-strength coaxial cable, including a sheath, and further comprising:

[0005] Conductors, used for signal transmission

[0006] An insulating layer is wrapped around the conductor. The insulating layer includes a first insulating layer, a second insulating layer, and a third insulating layer. The second insulating layer is disposed between the first insulating layer and the third insulating layer, and the thickness of the second insulating layer is greater than the sum of the thicknesses of the first insulating layer and the third insulating layer.

[0007] The first shielding layer is fitted over the insulation layer;

[0008] The second shielding layer is fitted over the first shielding layer, and the sheath is fitted over the second shielding layer. The first shielding layer and the second shielding layer are coaxially arranged with the conductor.

[0009] As a further improvement of this utility model, the insulation layer adopts a three-layer co-extrusion structure and is integrally formed.

[0010] As a further improvement of this utility model, the first insulating layer is an inner skin layer, the first insulating layer is integrally molded from PP material, and the diameter of the first insulating layer is 0.023-0.027mm.

[0011] As a further improvement of this utility model, the second insulating layer is a foamed PP layer, and the diameter of the second insulating layer is 1.41-1.46mm.

[0012] As a further improvement of this utility model, the third insulating layer is an outer skin layer, the second insulating layer is integrally formed from nylon material, and the diameter of the third insulating layer is 0.053-0.057mm.

[0013] As a further improvement of this utility model, the conductor is integrally formed from a 0.465mm copper-clad steel.

[0014] As a further improvement of this utility model, the conductor is formed by multi-strand copper-clad steel stranding.

[0015] As a further improvement of this utility model, the first shielding layer includes an aluminum foil surface, and the side of the first shielding layer that is in contact with the third insulating layer and the side that is in contact with the second shielding layer are both provided with an aluminum foil surface.

[0016] As a further improvement of this utility model, the second shielding layer is made of steel wire and tin-plated copper woven together.

[0017] As a further improvement of this utility model, the sheath is integrally molded from polyurethane material.

[0018] The beneficial effects of this invention are that the insulation layer increases the tensile strength of the core wire and improves transmission performance, meeting the needs of use in the high-vibration environment of automobiles. The inclusion of a first and second shielding layer enhances anti-interference performance, facilitating improved reliability of video signal transmission. This invention also boasts advantages such as simple structure, easy assembly, and long service life. Attached Figure Description

[0019] Appendix Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0020] In the diagram, 1 is the sheath; 2 is the conductor; 3 is the insulating layer; 31 is the first insulating layer; 32 is the second insulating layer; 33 is the third insulating layer; 4 is the first shielding layer; and 5 is the second shielding layer. Detailed Implementation

[0021] The embodiments of this utility model will be further described below with reference to the accompanying drawings:

[0022] Depend on Figure 1 As shown, a vehicle-mounted high-strength coaxial cable includes a sheath 1, and also includes:

[0023] Conductor 2, used for signal transmission;

[0024] An insulating layer 3 covers the conductor 2. The insulating layer 3 includes a first insulating layer 31, a second insulating layer 32 and a third insulating layer 33. The second insulating layer 32 is disposed between the first insulating layer 31 and the third insulating layer 33 and the thickness of the second insulating layer 32 is greater than the sum of the thickness of the first insulating layer 31 and the thickness of the third insulating layer 33.

[0025] The first shielding layer 4 is fitted over the insulating layer 3;

[0026] The second shielding layer 5 is sleeved outside the first shielding layer 4, and the sheath 1 is sleeved outside the second shielding layer 5. The first shielding layer 4 and the second shielding layer 5 are coaxially arranged with the conductor 2. The beneficial effects of this invention are that the insulation layers improve the tensile strength of the core wire and enhance transmission performance, meeting the needs of use in high-vibration environments such as automobiles. The first and second shielding layers also improve anti-interference performance, facilitating improved reliability of video signal transmission. This invention also features a simple structure, convenient assembly, and long service life.

[0027] The insulation layer 3 is integrally formed using a three-layer co-extrusion structure. A three-layer co-extrusion structure refers to a high-performance composite material made from three different materials through co-extrusion technology; this invention can use three-layer co-extrusion FMPP polypropylene to form the three-layer insulation layer.

[0028] The first insulating layer 31 is an inner skin layer, integrally molded from PP material, and its diameter is 0.023-0.027 mm. Specifically, the second insulating layer 32 is a foamed PP layer, with a diameter of 1.41-1.46 mm. More specifically, the third insulating layer 33 is an outer skin layer, integrally molded from nylon material, and its diameter is 0.053-0.057 mm. This effectively reduces the dielectric constant of the insulation, improves signal transmission speed, enhances transmission performance by using a foamed second insulating layer to meet video signal transmission requirements, and reduces material usage. The nylon third insulating layer increases the tensile strength of the core wire, meeting the needs of high-vibration environments in automobiles.

[0029] The conductor 2 is integrally formed from a single 0.465mm thick copper-clad steel strand. This results in high tensile strength and good conductivity. In another embodiment, the conductor 2 is formed by stranding multiple copper-clad steel strands. Specifically, the conductor can be formed by stranding seven copper-clad steel strands.

[0030] The first shielding layer 4 includes an aluminum foil side, and both the side of the first shielding layer 4 that is in contact with the third insulating layer 33 and the side that is in contact with the second shielding layer 5 are provided with aluminum foil. Compared with single-sided aluminum foil, the first shielding layer in this patent uses double-sided aluminum foil, which improves the anti-interference performance of the model.

[0031] The second shielding layer 5 is made of steel wire and tin-plated copper woven together. The second shielding layer makes the alloy conductor of the shielding layer have high tensile strength, good oxidation resistance, and good conductivity. Generally, the second shielding layer of the outer conductor of the coaxial line is grounded, and the electromagnetic field is confined between the inner and outer conductors. Therefore, the coaxial line has almost no radiation loss and is almost unaffected by external signal interference.

[0032] The sheath 1 is integrally molded from polyurethane material. This improves the tensile and tear strength of the sheath, meeting the requirements for use in high-vibration environments in automobiles.

[0033] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0035] Please note to all technical personnel: Although this utility model has been described according to the specific embodiments above, the inventive concept of this utility model is not limited to this utility model. Any modification that utilizes the inventive concept will be included within the scope of protection of this utility model patent.

Claims

1. A high strength on-board coaxial line comprising a sheath (1), characterized in that: The utility model also includes: a conductor (2) for signal transmission; an insulating group layer (3) covering the conductor (2), the insulating group layer (3) including a first insulating layer (31), a second insulating layer (32) and a third insulating layer (33), the second insulating layer (32) being arranged between the first insulating layer (31) and the third insulating layer (33) and the thickness of the second insulating layer (32) being greater than the sum of the thickness of the first insulating layer (31) and the thickness of the third insulating layer (33); a first shielding layer (4) covering the insulating group layer (3); a second shielding layer (5) covering the first shielding layer (4), a sheath (1) covering the second shielding layer (5), and the first shielding layer (4), the second shielding layer (5) and the conductor (2) being coaxially arranged.

2. A high strength coaxial cable for in-vehicle use according to claim 1, wherein The insulating group layer (3) is integrally formed in a three-layer co-extrusion structure.

3. The high strength coaxial cable for in-vehicle use according to claim 1, wherein The first insulating layer (31) is an inner skin layer, the first insulating layer (31) being integrally formed of PP material, and the diameter of the first insulating layer (31) being 0.023-0.027 mm.

4. The high strength coaxial cable for in-vehicle use according to claim 1, wherein The second insulating layer (32) is a foamed PP layer, and the diameter of the second insulating layer (32) being 1.41-1.46 mm.

5. The high strength in-line coaxial cable of claim 1, wherein The third insulating layer (33) is an outer skin layer, the second insulating layer (32) being integrally formed of nylon material, and the diameter of the third insulating layer (33) being 0.053-0.057 mm.

6. A high strength coaxial cable for in-vehicle use according to claim 1, wherein The conductor (2) is integrally formed of a 0.465 mm copper-clad steel.

7. The high strength in-line coaxial cable of claim 1, wherein The conductor (2) is integrally formed of a plurality of strands of copper-clad steel.

8. A high strength coaxial cable for in-vehicle use according to claim 1, wherein The first shielding layer (4) includes an aluminum foil surface, and the side of the first shielding layer (4) that is in contact with the third insulating layer (33) and the side of the first shielding layer (4) that is in contact with the second shielding layer (5) both include an aluminum foil surface.

9. The high strength in-line coaxial cable of claim 1, wherein The second shielding layer (5) is formed by interweaving steel wire and tinned copper.

10. The high strength in-line coaxial cable of claim 1, wherein The sheath (1) is integrally formed of polyurethane material.

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