Automobile security common-mode protection wire harness assembly

Abstract

The utility model discloses an automobile security common-mode protection wire harness assembly, comprising a wire harness, the wire harness comprises a plurality of signal wires and a functional layer, the functional layer is arranged outside the plurality of signal wires, the functional layer comprises a conductive layer, a shielding layer and a sheath layer, the conductive layer is a silver-plated copper woven mesh, and the shielding layer is arranged outside the conductive layer. The shielding layer is a nanocrystalline alloy film, the sheath layer is made of a polyimide material, the outer side of the sheath layer is coated with a polyurethane-silicon dioxide composite material, and a grounding terminal is arranged below the wire harness. According to the utility model, the common-mode protection capability of the wire harness is realized, and the driving safety is improved, so that the problems that the signal transmission is unstable and the driving safety is influenced due to the fact that the automobile security wire harness is easily subjected to common-mode interference in an electromagnetic environment when being used are solved.

Description

Technical Field

[0001] This utility model relates to the field of wiring harness assembly technology, specifically to an automotive security common-mode protection wiring harness assembly. Background Technology

[0002] Automotive security systems are an important component of modern automobiles, primarily responsible for protecting vehicles from theft, vandalism, and other forms of illegal intrusion. With technological advancements, automotive security systems have evolved from simple mechanical locks to a variety of high-tech security measures, including electronic anti-theft, biometric anti-theft, and network-based anti-theft. Wiring harnesses, as the main network component of automotive circuits, are crucial for connecting various automotive parts. In automotive security systems, wiring harnesses also play a vital role, responsible for transmitting power and signals to ensure the normal operation of the security system.

[0003] For example, the patent with publication number CN206619871U (a wire harness assembly) includes a wire sleeve and a branch wire passing through the wire sleeve. The branch wire passes out from the end of the wire sleeve. The wire sleeve has a plurality of sliding grooves along its length. A first expansion part and a second expansion part are connected in the sliding grooves. When the first expansion part and the second expansion part expand and arch, a snap-fit ​​groove is formed between them.

[0004] While the aforementioned existing technologies simplify the fixing and disassembly of wiring harness assemblies, they lack common-mode protection structures. Consequently, when used in automotive security wiring harnesses, they are susceptible to common-mode interference in the electromagnetic environment, leading to unstable signal transmission and affecting driving safety. Therefore, there is an urgent market need to develop an automotive security common-mode protection wiring harness assembly to help solve the existing problems. Utility Model Content

[0005] The purpose of this utility model is to provide an automotive security common-mode protection wiring harness assembly to solve the problem mentioned in the background art that automotive security wiring harnesses are easily affected by common-mode interference in the electromagnetic environment, resulting in unstable signal transmission and affecting driving safety.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a common-mode protection wiring harness assembly for automotive security, comprising a wiring harness, the wiring harness including signal lines and a functional layer, wherein multiple signal lines are provided, the functional layer is disposed on the outside of the multiple signal lines, the functional layer including a conductive layer, a shielding layer and a sheath layer, the conductive layer being a silver-plated copper braided mesh, the shielding layer being a nanocrystalline alloy film, the sheath layer being made of polyimide material, and the outer side of the sheath layer being coated with a polyurethane-silica composite material.

[0007] Preferably, a grounding terminal is provided below the wire harness, one end of which extends into the interior of the wire harness and contacts the shielding layer, and the grounding terminal is configured as a spring pin.

[0008] Preferably, a filler is provided between the signal line and the functional layer, and the filler is composed of hemp rope, nano-conductive filler and nano-magnetic filler.

[0009] Preferably, the signal line includes a wire core and an insulation layer, wherein the insulation layer is disposed on the outside of the wire core.

[0010] Preferably, a cable tray is provided on the outer side of the wire harness. The cable tray is composed of multiple lead plates. The lead plates are U-shaped plates, and rubber protrusions are symmetrically fixed on both sides inside the lead plates.

[0011] Preferably, the upper end of the lead plate is symmetrically provided with top grooves on both sides, and a baffle is provided inside the top groove. A rotating cap is provided on one side above the baffle, and a threaded rod is fixedly installed at the lower end of the rotating cap. The lower end of the threaded rod passes through the baffle and is threadedly connected to the lead plate.

[0012] Preferably, a connecting protrusion is fixedly installed on one side of the lead plate, and an upper groove is provided on the upper surface of the connecting protrusion. A connecting frame is fixedly installed on the other side of the lead plate. A rotating cap is provided above the connecting frame, and a threaded rod is fixedly installed below the rotating cap. A plate groove is provided above the inside of the connecting frame, and a strip plate is provided inside the plate groove. The lower end of the threaded rod is threadedly connected to the connecting frame and extends into the inside of the plate groove to rotatably connect with the strip plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) This utility model sets up a functional layer, which includes a conductive layer, a shielding layer and a sheath layer. The conductive layer uses a silver-plated copper braided mesh to enhance the electromagnetic shielding performance. The shielding layer uses a nanocrystalline alloy film to further enhance the protection against high-frequency electromagnetic waves. The sheath layer uses polyimide material and is coated with polyurethane-silica composite material, which not only ensures the durability and insulation of the wire harness, but also enhances the resistance to the external environment, thereby improving the stability of signal transmission and effectively avoiding signal distortion or interruption caused by common-mode interference, thus ensuring driving safety and improving the overall performance of the automotive security system.

[0015] (2) By setting a grounding terminal, and having one end of the grounding terminal extend into the interior of the wire harness and contact the shielding layer, the connection between the grounding terminal and the shielding layer is improved, the contact resistance is reduced, the discharge efficiency of common mode interference is improved, and the practicality is increased.

[0016] (3) By setting a filler composed of hemp rope, nano-conductive filler and nano-magnetic filler between the signal line and the functional layer, the present invention not only enhances the structural strength of the wire harness assembly, but also improves the electromagnetic shielding effect through nano-conductive and magnetic fillers, thereby enhancing the anti-electromagnetic interference capability of the wire harness assembly and ensuring the accuracy and stability of signal transmission. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a common-mode protection wiring harness assembly for automotive security according to the present invention;

[0018] Figure 2 This is a side view of the wire harness of this utility model;

[0019] Figure 3 This is a left-side structural schematic diagram of the lead plate of this utility model;

[0020] Figure 4 This is a right-side structural schematic diagram of the lead plate of this utility model;

[0021] Figure 5 This is a cross-sectional view of the connecting frame of this utility model.

[0022] In the diagram: 1. Wire harness; 2. Grounding terminal; 3. Lead plate; 301. Top groove; 4. Signal line; 401. Wire core; 402. Insulation layer; 5. Functional layer; 501. Conductive layer; 502. Shielding layer; 503. Sheath layer; 6. Connecting frame; 7. Rubber protrusion; 8. Baffle; 9. Rotary cap one; 10. Connecting protrusion; 1001. Upper groove; 11. Rotary cap two; 12. Threaded rod two; 13. Strip plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Please see Figure 1-5 This utility model provides an embodiment of a common-mode protection wiring harness assembly for automotive security, comprising a wiring harness 1, which includes signal lines 4 and a functional layer 5. Multiple signal lines 4 are provided, and the functional layer 5 is disposed on the outer side of the multiple signal lines 4. The functional layer 5 includes a conductive layer 501, a shielding layer 502, and a sheath layer 503, arranged sequentially from the inside to the outside. The conductive layer 501 is a silver-plated copper braided mesh, the shielding layer 502 is a nanocrystalline alloy film, and the sheath layer 503 is made of polyimide material. The outer side of the sheath layer 503 is coated with a polyurethane-silica composite material.

[0025] The conductive layer 501, made of silver-plated copper braided mesh, efficiently reflects and absorbs high-frequency electromagnetic interference. The shielding layer 502, made of nanocrystalline alloy film, has high magnetic permeability and effectively suppresses low-frequency magnetic field interference. Together, they cover interference bands from low to high frequencies, ensuring signal transmission stability. The sheath layer 503, made of polyimide, has good insulation properties and mechanical strength, preventing external physical damage and electrical short circuits. Meanwhile, the polyurethane-silica composite material coated on its outer side further enhances the wear resistance and durability of the wiring harness, extending its service life. This effectively solves the problem of common-mode interference in complex electromagnetic environments for automotive security wiring harnesses, improving signal transmission stability and driving safety.

[0026] Please see Figure 1 and Figure 2 A grounding terminal 2 is provided below the wiring harness 1. One end of the grounding terminal 2 extends into the interior of the wiring harness 1 and contacts the shielding layer 502. The grounding terminal 2 is configured as a spring pin and is connected to the vehicle grounding point through an external low-impedance wire.

[0027] By connecting one end of the grounding terminal 2 to the shielding layer 502, the connection between the grounding terminal 2 and the shielding layer 502 is achieved, reducing the contact resistance and improving the discharge efficiency of common-mode interference.

[0028] Please see Figure 2 A filler is provided between signal line 4 and functional layer 5, and the filler is composed of hemp rope, nano-conductive filler and nano-magnetic filler.

[0029] The addition of fillers not only enhances the structural strength of the wire harness assembly, but also improves the electromagnetic shielding effect through nano-conductive and magnetic fillers, thereby enhancing the wire harness assembly's resistance to electromagnetic interference and ensuring the accuracy and stability of signal transmission.

[0030] Please see Figure 2 The signal line 4 includes a wire core 401 and an insulation layer 402, with the insulation layer 402 disposed on the outside of the wire core 401.

[0031] The insulation layer 402 prevents electrical short circuits and signal interference between the wire cores 401, which is beneficial to the stability and accuracy of the signal line 4 during transmission and provides reliable signal support for the automotive security system.

[0032] Please see Figure 1 and Figure 3 A cable tray is provided on the outside of the wire harness 1. The cable tray is composed of multiple lead plates 3. The lead plates 3 are U-shaped plates. Rubber protrusions 7 are symmetrically fixed on both sides inside the lead plates 3.

[0033] The cable tray makes the wiring of the harness assembly neater and more aesthetically pleasing. In addition, the rubber protrusions 7 enhance the fixation between the harness and the cable tray, preventing the harness from shaking and being damaged during driving, and improving the stability and safety of the harness assembly.

[0034] Please see Figure 3 The top of the lead plate 3 is symmetrically provided with top grooves 301 on both sides of the upper end. A baffle 8 is provided inside the top groove 301. A rotating cap 9 is provided on one side above the baffle 8. A threaded rod is fixedly installed at the lower end of the rotating cap 9. The lower end of the threaded rod passes through the baffle 8 and is threadedly connected to the lead plate 3.

[0035] The baffle 8 is designed to prevent the wire harness 1 from falling out of the lead plate 3. The baffle 8 can be fixed and removed by the cooperation of the rotating cap 9 and the threaded rod.

[0036] Please see Figure 3 , Figure 4 and Figure 5 A connecting protrusion 10 is fixedly installed on one side of the lead plate 3. An upper groove 1001 is provided on the upper surface of the connecting protrusion 10. A connecting frame 6 is fixedly installed on the other side of the lead plate 3. A rotating cap 11 is provided above the connecting frame 6. A threaded rod 12 is fixedly installed below the rotating cap 11. A plate groove is provided at the upper part of the connecting frame 6. A strip plate 13 is provided inside the plate groove. The lower end of the threaded rod 12 is threadedly connected to the connecting frame 6 and extends into the plate groove to rotatably connect with the strip plate 13. The shape and size of the strip plate 13 and the upper groove 1001 match, so that when two adjacent lead plates 3 are connected, the connecting protrusion 10 is inserted into the connecting frame 6, and then the rotating cap 11 is rotated to make the threaded rod 12 move the strip plate 13 down and lock it into the upper groove 1001, thus realizing the composition of two lead plates 3, and thus realizing the composition of the cable tray.

[0037] By using the cooperative design of connecting convex plate 10, connecting frame 6, rotating cap 11, threaded rod 12 and strip plate 13, the quick connection and disassembly of two adjacent lead plates 3 are realized. This not only simplifies the assembly process of the cable tray and improves work efficiency, but also enhances the connection stability between adjacent lead plates 3 through the cooperation of strip plate 13 and upper groove 1001, ensuring the overall strength and stability of the cable tray.

[0038] Working principle: During use, the multiple signal lines 4 inside the harness 1 are wrapped by a conductive layer 501 made of silver-plated copper braided mesh and a shielding layer 502 made of nanocrystalline alloy film. These two layers work together to efficiently reflect and absorb high-frequency electromagnetic interference and effectively suppress low-frequency magnetic field interference, covering a wide range of interference frequency bands and ensuring the stability of signal transmission. The outer sheath layer 503, made of polyimide material, provides good insulation performance and mechanical strength to prevent physical damage and electrical short circuits. The polyurethane-silica composite material coated on the outside of the sheath layer 503 further enhances wear resistance and durability. At the same time, the grounding terminal 2 below the harness 1 contacts the shielding layer and is connected to the vehicle grounding point through a low-impedance wire, effectively dissipating common-mode interference and reducing contact resistance. The hemp rope, nano-conductive and magnetic fillers filling the space between the signal lines 4 and the functional layer 5 not only enhance the structural strength but also improve the electromagnetic shielding effect.

[0039] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An automotive security common mode protection wiring harness assembly comprising a wiring harness (1), characterised in that: The wiring harness (1) includes signal lines (4) and a functional layer (5). Multiple signal lines (4) are provided. The functional layer (5) is provided on the outside of the multiple signal lines (4). The functional layer (5) includes a conductive layer (501), a shielding layer (502), and a sheath layer (503). The conductive layer (501) is a silver-plated copper braided mesh. The shielding layer (502) is a nanocrystalline alloy film. The sheath layer (503) is made of polyimide material. The outer side of the sheath layer (503) is coated with a polyurethane-silica composite material.

2. The automotive safety common mode protection wiring harness assembly of claim 1, wherein: A grounding terminal (2) is provided below the wire harness (1). One end of the grounding terminal (2) extends into the interior of the wire harness (1) and contacts the shielding layer (502). The grounding terminal (2) is configured as a spring pin.

3. The automotive security common-mode protection wiring harness assembly according to claim 1, characterized in that: A filler is provided between the signal line (4) and the functional layer (5), and the filler is composed of hemp rope, nano-conductive filler and nano-magnetic filler.

4. The automotive safety common mode protection wiring harness assembly of claim 1, wherein: The signal line (4) includes a core (401) and an insulating layer (402), the insulating layer (402) being disposed on the outside of the core (401).

5. The automotive safety common mode protection wire harness assembly of claim 1, wherein: The wire harness (1) is provided with a wire rack on the outside. The wire rack is composed of multiple lead plates (3). The lead plates (3) are U-shaped plates. Rubber protrusions (7) are symmetrically fixed on both sides inside the lead plates (3).

6. An automotive safety common mode protection wiring harness assembly according to claim 5, wherein: The top grooves (301) are symmetrically arranged on both sides of the upper end of the lead plate (3). A baffle (8) is arranged inside the top groove (301). A rotating cap (9) is arranged on one side above the baffle (8). A threaded rod is fixedly installed at the lower end of the rotating cap (9). The lower end of the threaded rod passes through the baffle (8) and is threadedly connected to the lead plate (3).

7. An automotive safety common mode protection wiring harness assembly according to claim 6, wherein: A connecting protrusion (10) is fixedly installed on one side of the lead plate (3). An upper groove (1001) is provided on the upper surface of the connecting protrusion (10). A connecting frame (6) is fixedly installed on the other side of the lead plate (3). A rotating cap (11) is provided above the connecting frame (6). A threaded rod (12) is fixedly installed below the rotating cap (11). A plate groove is provided above the interior of the connecting frame (6). A strip plate (13) is provided inside the plate groove. The lower end of the threaded rod (12) is threadedly connected to the connecting frame (6) and extends into the interior of the plate groove to rotately connect with the strip plate (13).

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