A wire harness assembly for an automotive wheel control system

Abstract

The utility model provides a harness assembly for automobile wheel control system, including flexible plastic sleeve, interval setting and injection molding on the sleeve outer wall on several are used for fixed installation's clamping point, and several electric wires are in parallel and are arranged in the sleeve, the sleeve includes the insulating layer of inner layer and the conductive layer of doping with conductive material of outer layer, and the insulating layer and the conductive layer are co-extrusion forming, the outer periphery of conductive layer still is fixed with one ground conductive connector. Adopt the conductive layer of doping with conductive material, and through the ground connector, can make the static electricity of sleeve gathering dissipate, thereby avoid generating transient pulse, no metal shielding layer, can avoid the short circuit or protection invalidation risk caused by the abrasion electric wire or sleeve, the inner layer of sleeve adopts the insulating layer, can avoid the short circuit between the protective layer of electric wire in the sleeve and the conductive layer after breakage, the sleeve forms first, and then arranges the electric wire, and the sleeve and the electric wire are the split structure, can avoid the situation that the electric wire is damaged when stress concentration is avoided.

Description

Technical Field

[0001] This utility model relates to the field of automotive wiring harness technology, specifically to a wiring harness assembly for an automotive wheel control system. Background Technology

[0002] Automotive EMB (Electromechanical Braking) wiring harnesses and other wheel control system harnesses are highly exposed to environments such as high-speed rotation, moisture, dust, temperature changes, metal friction, and magnetic fields from wheel speed sensors, posing a significant risk of electrostatic discharge (ESD). ESD can generate transient pulses, potentially damaging control units, interfering with sensor signals, interfering with motors, and affecting system communication. Current methods address this ESD issue by incorporating a braided or aluminum foil metal shielding layer within the harness's protective sleeve. However, during prolonged high-speed movement with the vehicle, especially at points with small turning radii, the metal shielding layer can wear down the internal wires' protective layer or the outer protective sleeve, leading to short circuits or protective failure. Furthermore, using a metal shielding layer requires first weaving it around the wires and then integrally molding the protective sleeve around it. This tight bonding from the core to the outer layer concentrates stress at bends, making the internal wires more susceptible to damage during use. Therefore, improvements are necessary. Utility Model Content

[0003] This invention provides a wiring harness assembly for a wheel control system that has electrostatic dissipation function and higher reliability.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A wiring harness assembly for an automotive wheel control system includes a flexible plastic sleeve, a plurality of mounting points for fixed installation spaced apart and injection-molded on the outer peripheral wall of the sleeve, and a plurality of wires passing through the sleeve in parallel; the sleeve includes an inner insulating layer and an outer conductive layer doped with conductive material, the insulating layer and the conductive layer being co-extruded; a grounding conductive connector is also fixed to the outer periphery of the conductive layer.

[0006] In a preferred embodiment, the inner wall of the sleeve is provided with a plurality of protruding ridges evenly distributed along the circumference, and each of the protruding ridges extends along the axial direction of the sleeve and penetrates the beginning and end of the sleeve.

[0007] In a preferred embodiment, both the insulating layer and the conductive layer are based on TPU (thermoplastic polyurethane) materials.

[0008] In a preferred embodiment, the conductive material doped within the conductive layer is a permanent antistatic agent or conductive carbon black.

[0009] In a preferred embodiment, the conductive connector is a metal clamp that fits tightly to the outer periphery of the sleeve, and the first and last joints of the clamp are provided with holes for the external grounding wire.

[0010] In a preferred embodiment, the mounting point is also a conductive component doped with conductive material.

[0011] The beneficial effects of this utility model are as follows: 1. By using a conductive layer doped with conductive material and grounding it through a conductive connector, the static electricity accumulated in the bushing can be dissipated, thereby avoiding the generation of transient pulses; 2. Compared with the prior art, there is no metal shielding layer, which can avoid the risk of short circuits or protection failures caused by wear and tear on the wires or bushings; 3. The inner layer of the bushing is made of an insulating layer, which can prevent short circuits between the protective layer of the wires inside the bushing and the conductive layer after the protective layer is damaged, further improving reliability; 4. The bushing is formed first, and then the wires are inserted. The bushing and the wires are separate structures, which is different from the existing integrated structures. 5. The molded structure avoids stress concentration during bending, which could damage the wires; 6. The inner wall of the sleeve has raised ridges, which reduces the contact area between the wire and the inner wall of the sleeve. At the same time, the raised ridges also have a guiding function, improving the efficiency of threading the wire into the sleeve during production; 7. Because the raised ridges on the inner wall of the sleeve make threading the wire smooth, there is no need to reserve a gap space inside the sleeve for threading the wire. The inner wall of the sleeve can maintain contact with the wire through the raised ridges. In addition, the TPU material of the sleeve has good recovery after the external force is removed, so there will be no situation where the wire is damaged due to the bending and deformation of the sleeve. Attached Figure Description

[0012] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0013] Figure 1 This is a schematic diagram of the overall structure of the wire harness assembly;

[0014] Figure 2 This is a schematic diagram of the cross-sectional structure of the wire harness assembly. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings:

[0016] Reference image and Figure 2 This embodiment uses a wiring harness assembly for an automotive wheel control system, including a flexible plastic sleeve 1, a plurality of fixing points 2 spaced apart and injection-molded on the outer peripheral wall of the sleeve 1 for fixed installation, and a plurality of wires 3 arranged in parallel inside the sleeve 1; the sleeve 1 includes an inner insulating layer 11 and an outer conductive layer 12 doped with conductive material, the insulating layer 11 and the conductive layer 12 being co-extruded; a grounding conductive connector 4 is also fixed to the outer periphery of the conductive layer 12.

[0017] During production, the insulating layer 11 and conductive layer 12 of the sleeve 1 are first co-extruded. Then, several mounting points 2 are injection molded on the outer periphery of the sleeve 1, and conductive connectors 4 are fixed in place. Finally, several wires 3 are threaded through the sleeve 1. The inner diameter of the sleeve 1 is usually matched with the overall diameter of the wires 3 to be threaded through. The use of a conductive layer 12 doped with conductive material and grounding through conductive connectors 4 can dissipate the static electricity accumulated in the sleeve 1, thereby avoiding the generation of transient pulses. Compared with the prior art, there is no metal shielding layer, which can avoid the risk of short circuit or protection failure caused by wear and tear on the wires 3 or the sleeve 1. The inner layer of the sleeve 1 uses an insulating layer 11, which can avoid short circuit between the protective layer of the wires 3 inside the sleeve 1 and the conductive layer 12 after the protective layer is damaged, further improving reliability. The sleeve 1 is formed first, and then the wires 3 are threaded through. The sleeve 1 and the wires 3 are separate structures. Compared with the existing one-piece molding structure, it can avoid stress concentration during bending that could damage the wires 3.

[0018] In a preferred embodiment, the inner wall of the sleeve 1 in this embodiment is uniformly provided with a plurality of protruding ribs 13 along the circumference. Each protruding rib 13 extends along the axial direction of the sleeve 1 and penetrates the beginning and end of the sleeve 1. The protruding ribs 13 on the inner wall of the sleeve 1 reduce the contact area between the wire 3 and the inner wall of the sleeve 1. At the same time, the protruding ribs 13 also have a guiding function, which improves the efficiency of threading the wire 3 into the sleeve 1 during production. Because the protruding ribs 13 on the inner wall of the sleeve 1 make threading the wire smooth, there is no need to reserve a gap space inside the sleeve 1 for threading the wire 3. This allows the inner wall of the sleeve 1 to maintain contact with the wire 3 through the protruding ribs 13. In addition, the TPU material sleeve 1 has the characteristic of good recovery after the external force is removed, so there will be no situation where the wire 3 is damaged due to bending and deformation of the sleeve 1.

[0019] In a preferred embodiment, both the insulating layer 11 and the conductive layer 12 are made of TPU material. TPU has excellent wear resistance, excellent flexibility, good low-temperature resistance, strong resistance to stone impacts, and strong resistance to oil and fuel. In other embodiments, the substrates of the insulating layer 11 and the conductive layer 12 can also be made of materials such as nylon 6 or nylon 12, TPE (thermoplastic elastomer), or PVC (polyvinyl chloride).

[0020] In a preferred embodiment, the conductive material doped within the conductive layer 12 is preferably a permanent antistatic agent or conductive carbon black. The permanent antistatic agent can be a polyether block copolymer or a TPU-specific antistatic masterbatch.

[0021] In a preferred embodiment, the conductive connector 4 is a metal clamp that fits tightly around the outer periphery of the sleeve 1, and the end joint of the clamp is provided with a wire hole for the external grounding wire. The wire hole is connected to the grounding wire 41 and is connected to the release point of the vehicle chassis through the grounding wire 41.

[0022] In a preferred embodiment, the mounting point 2 is also a conductive component doped with conductive material. At some mounting points 2, the wire harness assembly forms multiple branches, and the sleeve 1 also branches into multiple branches. At this time, the sleeve 1 of each branch is independent and needs to be integrally connected to the mounting point 2 through injection molding. By setting the mounting point 2 as a conductive component, the conductivity continuity of each part of the sleeve 1 can be ensured, thereby effectively releasing static electricity.

[0023] The above description does not limit the technical scope of this utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A wiring harness assembly for an automotive wheel control system, characterized in that: The device includes a flexible plastic sleeve, a plurality of fixing points for fixed installation that are spaced apart and injection molded on the outer peripheral wall of the sleeve, and a plurality of wires that are arranged in parallel inside the sleeve; the sleeve includes an inner insulating layer and an outer conductive layer doped with conductive material, the insulating layer and the conductive layer being co-extruded; a grounding conductive connector is also fixed to the outer periphery of the conductive layer.

2. The wiring harness assembly for an automotive wheel control system according to claim 1, characterized in that: The inner wall of the sleeve is uniformly provided with several protruding ridges along the circumference, and each protruding ridge extends along the axial direction of the sleeve and penetrates the beginning and end of the sleeve.

3. The wiring harness assembly for an automotive wheel control system according to claim 1, characterized in that: Both the insulating layer and the conductive layer are based on TPU material components.

4. A wiring harness assembly for an automotive wheel control system according to claim 3, characterized in that: The conductive material doped within the conductive layer is a permanent antistatic agent or conductive carbon black.

5. A wiring harness assembly for an automotive wheel control system according to claim 1, characterized in that: The conductive connector is a metal clamp that fits tightly to the outer periphery of the sleeve, and the beginning and end joints of the clamp are provided with holes for the external grounding wire.

6. A wiring harness assembly for an automotive wheel control system according to claim 1, characterized in that: The mounting point is also a conductive component doped with conductive material.

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