Composite wire for automobile

Abstract

The invention belongs to the technical field of automobiles, and relates to a composite wire for an automobile. Comprising a wire and an insulating layer wrapping the wire, the wire comprises a steel wire and a plurality of copper wires, and the copper wires uniformly surround the outer wall of the steel wire at intervals. By adopting the combination of the steel wire and the copper wire, the mechanical property of the wire is greatly improved on the premise of not sacrificing the conductivity.

Description

Technical Field

[0001] The invention belongs to the technical field of automobiles, and in particular relates to a composite wire for automobiles. Background Art

[0002] Automotive wires are also called low-voltage wires. Because they need to meet high bending performance, automotive wires are copper multi-core soft wires, with several or even dozens of soft copper wires wrapped in plastic insulation tubes (polyvinyl chloride). Due to the special installation space of automotive wires, they need to meet the requirements of bending and stretching, that is, they need higher mechanical strength. To meet the mechanical strength requirements, the existing technology is to increase the diameter of the wire, which will increase the amount of copper accordingly.

[0003] A Chinese patent discloses a highly elastic thin-walled automotive wire [application number: CN201720316005.4], which includes a conductor, wherein the conductor includes a central wire, a spring hose is coaxially sleeved outside the central wire, and the conductor also includes 6 copper tinned wires wound around the spring hose. The conductor is sequentially coated with a high-temperature resistant layer and an outer insulating layer, wherein the high-temperature resistant layer is made of polyurethane material, and the outer insulating layer is made of polyolefin halogen-free flame retardant and radiation-free material. The highly elastic thin-walled automotive wire has good bending performance, thin wall thickness, and light weight. The above patent has a certain improvement in bending resistance, but after the wire is sleeved with a spring hose, the process is complicated and the cost increases accordingly, which is not conducive to large-scale promotion. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions.

[0005] A composite wire for automobiles comprises a wire and an insulating layer wrapped outside the wire, wherein the wire comprises a steel wire and a plurality of copper wires, and the copper wires are evenly spaced around the outer wall of the steel wire.

[0006] In the above-mentioned composite wire for automobiles, there are 7-8 copper wires.

[0007] In the above-mentioned composite wire for automobiles, there are 7 copper wires.

[0008] In the above-mentioned composite conductor for automobiles, the outer wall of the steel wire has an anti-oxidation layer.

[0009] In the above-mentioned composite wire for automobiles, the material of the anti-oxidation layer is copper.

[0010] In the above-mentioned composite conductor for automobiles, the copper wire is an electrical round copper wire with a diameter of 0.19-0.2 mm.

[0011] In the above-mentioned composite wire for automobiles, the diameter of the steel wire is not less than the diameter of the copper wire.

[0012] In the above-mentioned composite wire for automobiles, the insulating layer is made of PVC.

[0013] Compared with the prior art, the advantages of the present invention are:

[0014] The combination of steel wire and copper wire greatly improves the mechanical properties of the conductor without sacrificing the conductive performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a cross-sectional schematic diagram of the present invention;

[0016] Figure 2 is a schematic diagram of the present invention;

[0017] In the figure: conductor 1, insulation layer 2, steel wire 3, copper wire 4, anti-oxidation layer 5. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] like Figure 1 and Figure 2 As shown, a composite wire for automobiles includes a wire 1 and an insulating layer 2 wrapped outside the wire 1, and the insulating layer 2 is made of PVC. The wire 1 includes a steel wire 3 and a plurality of copper wires 4, and the plurality of copper wires 4 are spiral-shaped, and the copper wires 4 are evenly spaced around the outer wall of the steel wire 3.

[0020] In this embodiment, the steel wire 3 meets the mechanical strength requirement of the conductor, while the copper wire 4 does not sacrifice the conductive performance. Through the combination of the steel wire 3 and the copper wire, the mechanical strength is improved while meeting the conductive requirements of the automotive conductor, and the amount of copper can be effectively reduced, achieving the effect of energy saving and efficiency improvement.

[0021] In this embodiment, there are 7-8 copper wires 4, and a preferred solution is that there are 7 copper wires 4.

[0022] Furthermore, in this embodiment, the copper wire 4 is wrapped around the outer periphery of the steel wire 3, and the steel wire 3 increases its mechanical strength. However, an oxidation reaction is easily generated between the steel wire and the copper wire in the presence of air, which will affect the overall performance of the conductor. Therefore, this embodiment adopts a method of providing an anti-oxidation layer 5 on the outer wall of the steel wire 3 to solve this problem. Specifically, the anti-oxidation layer 5 is made of copper, that is, the anti-oxidation layer 5 is a copper film wrapped around the outer wall of the steel wire 3, and the copper film is in direct contact with the copper wire 4, thereby avoiding the occurrence of an oxidation reaction. The copper film can be formed on the outer wall of the steel wire 3 by electroplating, which is a prior art and will not be described in detail here.

[0023] In this embodiment, the copper wire 4 is an electrical round copper wire with a diameter of 0.2 mm. Of course, the diameter of the copper wire 4 is not limited to 0.2 mm, and can also be 0.17 mm, 0.18 mm, 0.19 mm, 0.21 mm, 0.22 mm, etc.

[0024] As described above, the steel wire 3 of this embodiment improves the overall mechanical properties of the conductor, so the steel wire 3 is located in the middle of the conductor. Therefore, there is no necessary matching relationship between the diameter of the steel wire 3 and the diameter of the copper wire 4, that is, the diameter of the steel wire 3 can be larger than the diameter of the copper wire 4, or smaller than the diameter of the copper wire 4.

[0025] As a preferred solution, the diameter of the steel wire 3 is not less than the diameter of the copper wire 4, so that the steel wire 3 and the copper wire 4 can fit relatively tightly, preventing hollowing between the two, and also helping to improve the mechanical properties of the conductor.

[0026] Comparative Example 1

[0027] The conductive core is formed by 7 copper wires with a diameter of 0.35 mm each, and the outer insulating layer is PVC with a thickness of 1 mm to make the automotive wire.

[0028] Comparative Example 2

[0029] The conductive core is formed by 7 copper wires with a diameter of 0.22 mm each, and the outer insulating layer is PVC with a thickness of 1 mm to make the automotive wire.

[0030] Comparative Example 1

[0031] The conductive wire core is formed by 7 aluminum alloy wires with a diameter of 0.13 mm each, and the outer insulating layer is PVC with a thickness of 1 mm to make an automotive wire.

[0032] Application Examples

[0033] The composite wire of this embodiment has 7 copper wires 4, each of which has a diameter of 0.19 mm, and the middle steel wire 3 has a diameter of 0.2 mm. The outer insulating layer is PVC with a thickness of 1 mm, and is made into an automobile wire.

[0034] Test data

[0035] The following table shows the test data of automotive wires for comparison and application examples. The tensile strength and bending cycle adopt the standard "ISO 19642-2-2023", and the other items adopt the standard "GB / T 25085-2010".

[0036]

[0037] It can be seen from the above table that the automotive wire prepared in this embodiment has obvious advantages in the tensile strength and bending cycle tests. The tensile strength and bending cycle data of the conductor diameter of 0.56 mm in this embodiment are significantly higher than the test data of the conductor diameters of 0.90 mm and 0.70 mm in Comparative Examples 1 and 2, indicating that the automotive wire of this embodiment has excellent mechanical properties.

[0038] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways without departing from the spirit of the present invention.

Claims

1. A composite wire for automobiles, comprising a wire (1) and an insulating layer (2) wrapped around the wire (1), It is characterized in that The conductor (1) comprises a steel wire (3) and a plurality of copper wires (4), wherein the copper wires (4) are evenly spaced and wrapped around the outer wall of the steel wire (3).

2. The composite wire for automobile according to claim 1, It is characterized in that The copper wires (4) are 7-8 in number.

3. The composite wire for automobile according to claim 1, It is characterized in that There are 7 copper wires (4).

4. The composite wire for automobile according to claim 1, It is characterized in that The outer wall of the steel wire (3) is provided with an anti-oxidation layer (5).

5. The composite wire for automobile according to claim 1, It is characterized in that The material of the anti-oxidation layer (5) is copper.

6. The composite wire for automobile according to claim 1, It is characterized in that The copper wire (4) is an electrical round copper wire with a diameter of 0.19-0.2 mm.

7. The composite wire for automobile according to claim 1, It is characterized in that The diameter of the steel wire (3) is not less than the diameter of the copper wire (4).

8. The composite wire for automobile according to claim 1, It is characterized in that The insulating layer (2) is made of PVC.

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