A whole vehicle front door low-voltage wire harness structure convenient to assemble and maintain

Abstract

This invention discloses a low-voltage wiring harness technology for vehicle front doors, specifically a structure for easy assembly and maintenance of a low-voltage wiring harness for vehicle front doors. The structure includes: a main front door wiring harness; at least one functional branch wiring harness assembly; and at least one quick-connect connector assembly. The quick-connect connector assembly includes a detachably connectable male connector terminal and a female connector terminal. The male connector terminal is provided with conductive contact terminals and is fixedly connected to the functional branch wiring harness assembly. The female connector terminal is disposed on the main front door wiring harness, thereby enabling the functional branch wiring harness assembly and the main front door wiring harness to form a modular connection. This invention employs a modular branch design combined with a foolproof quick-connect connector, completely changing the traditional overall binding mode. Assembly personnel can quickly connect the harness based on clear markings and the foolproof structure, significantly simplifying the assembly process and effectively reducing the probability of incorrect or missing connections.

Description

Technical Field

[0001] This invention relates to the field of low-voltage wiring harness technology for the front doors of vehicles, specifically a low-voltage wiring harness structure for the front doors of vehicles that is easy to assemble and maintain. Background Technology

[0002] As vehicles become increasingly intelligent, the front doors, being the most frequently interacted part of the vehicle, have seen a significant increase in the number of electrical devices they house. In addition to traditional window regulators, door lock controls, and rearview mirror adjustments, they also integrate speakers, ambient lighting, various sensors, and door control modules, among many other components. This makes the front door low-voltage wiring harness one of the most complex and densely branched components in the entire vehicle's electrical system.

[0003] However, the mainstream low-voltage wiring harnesses in the industry still generally adopt an "integrated" binding design, that is, all branch wiring harnesses and main wiring harnesses are fixed together by cable ties, tape or a combination of tape and cable ties. This traditional structural form has gradually revealed a series of drawbacks in practical applications: First, the assembly process requires disassembling complex cable ties, and the branching direction lacks regularity. Assembly personnel need to rely on experience to sort and locate each branch one by one, resulting in cumbersome assembly procedures and excessive time consumption. Second, in the after-sales maintenance process, if a branch fails, the overall binding structure must be destroyed or the entire wiring harness assembly must be removed for replacement, which is difficult to repair, time-consuming, and prone to causing secondary damage to surrounding components during disassembly. Third, the functions of different configuration models vary greatly, and traditional wiring harnesses cannot be universally adapted through simple adjustments, forcing companies to develop and mold them separately, significantly increasing R&D and production costs. In addition, due to the complex routing of the wiring harness and the lack of effective fixation, the wiring harness is prone to continuous friction with the door interior panels and glass rails during vehicle operation, leading to wear on the outer sheath, insulation failure, and even safety hazards such as open circuits and short circuits.

[0004] The closest existing technical solution to this invention mainly adopts a conventional structure of integrating a main harness with multiple branches. In this solution, the main harness is connected to the main harness of the vehicle body through a standard connector, and each branch harness is directly fixed to a predetermined point on the door sheet metal by cable ties. Only the parts that come into contact with the sharp edges of the sheet metal are wrapped with simple rubber sleeves for temporary protection.

[0005] While this technical solution can achieve basic electrical connection functions, its technical shortcomings have become increasingly prominent after long-term practical verification. Firstly, regarding assembly efficiency, the lack of standardized functional markings at the ends of branch harnesses and the absence of precise guidance for docking positions on the main harness make incorrect, missed, or reversed insertions during assembly highly likely, severely impacting the overall vehicle production cycle. Secondly, regarding connection reliability, conventional connectors rely heavily on color differentiation or shape limitations, lacking effective mechanical error prevention structures. Incorrect connections can lead to burnout of the gate control module or permanent damage to electrical components. Thirdly, regarding maintenance convenience, the bundled structure design often necessitates disassembling the entire harness assembly for single-branch faults, resulting in high repair costs and labor intensity. Finally, regarding protection and versatility, simple rubber sleeves cannot effectively resist friction and wear between the harness and interior trim panels, and the lack of interchangeability between high- and low-configuration vehicle harnesses hinders cost reduction, efficiency improvement, and market competitiveness for enterprises. Summary of the Invention

[0006] To address the technical problems existing in the front door low-voltage wiring harness regarding assembly efficiency, connection reliability, ease of maintenance, protection capability, and versatility, this invention provides the following technical solution: A vehicle front door low-voltage wiring harness structure that is easy to assemble and maintain, comprising: Front door main wiring harness; At least one functional branch harness assembly; At least one quick-connect connector assembly, the quick-connect connector assembly including a detachably connected male connector end and a female connector end, the male connector end being provided with conductive contact terminals, the male connector end being fixedly connected to the functional branch harness assembly, and the female connector end being disposed on the front door main harness, so that the functional branch harness assembly and the front door main harness form a modular connection.

[0007] As a preferred embodiment of the vehicle front door low-voltage wiring harness structure that facilitates assembly and maintenance according to the present invention, wherein: an asymmetrical anti-foolproof guide groove is provided at the connection interface between the male end of the connector and the female end of the connector to limit the unique insertion direction of the male end of the connector and the female end of the connector.

[0008] As a preferred embodiment of the vehicle front door low-voltage wiring harness structure that is easy to assemble and maintain according to the present invention, the quick-connect connector assembly further includes an elastic self-locking buckle, which is integrated on the housing of the male end of the connector and is used to automatically lock after being plugged in to prevent loosening.

[0009] As a preferred embodiment of the vehicle front door low-voltage wiring harness structure that is easy to assemble and maintain according to the present invention, wherein: the female end of the connector is provided with a waterproof sealing ring, which forms a waterproof seal when the male end of the connector is inserted into the female end of the connector.

[0010] As a preferred embodiment of the vehicle front door low-voltage wiring harness structure that is easy to assemble and maintain according to the present invention, it further includes a combined protective component, which includes a corrugated pipe protective section covering the bending section of the main wiring harness of the front door, and wear-resistant protective sponge covering the easily friction-prone parts.

[0011] As a preferred embodiment of the vehicle front door low-voltage wiring harness structure that is easy to assemble and maintain according to the present invention, it further includes a fixing and limiting component, which includes multiple wiring harness fixing clips for fixing the front door main wiring harness to the door sheet metal, and the wiring harness fixing clips are installed on the door sheet metal through sheet metal fixing brackets, as well as a branch limiting bracket for limiting the direction and position of the functional branch wiring harness assembly.

[0012] As a preferred embodiment of the vehicle front door low-voltage wiring harness structure that is easy to assemble and maintain according to the present invention, wherein: the main wiring harness of the front door is provided with cable tie limiting points for assisting in the shaping of the wiring harness.

[0013] As a preferred embodiment of the vehicle front door low-voltage wiring harness structure that facilitates assembly and maintenance as described in this invention, the front door main wiring harness and the functional branch wiring harness assembly are provided with laser-engraved wiring harness identification labels.

[0014] As a preferred embodiment of the vehicle front door low-voltage wiring harness structure that is easy to assemble and maintain according to the present invention, the functional branch wiring harness assembly includes a door lock branch wiring harness, a window regulator branch wiring harness, a rearview mirror adjustment branch wiring harness, a speaker branch wiring harness, and an ambient light branch wiring harness.

[0015] As a preferred embodiment of the vehicle front door low-voltage wiring harness structure that is easy to assemble and maintain according to the present invention, wherein: the end of the front door main wiring harness is also fixedly connected to a body docking connector for docking with the body main wiring harness.

[0016] Compared with existing technologies: First, this invention employs a modular branch design combined with a foolproof quick-connect connector, completely changing the traditional overall binding mode. Assembly personnel can quickly connect the components based on clear markings and the foolproof structure, significantly simplifying the assembly process and effectively reducing the probability of incorrect or missing connections. The assembly time for the front door wiring harness of a single vehicle is greatly shortened, significantly improving the overall vehicle production efficiency. Second, the modular structure allows for independent disassembly and replacement of a single faulty branch without disassembling the entire wiring harness assembly, greatly reducing maintenance time and significantly lowering after-sales maintenance costs and material waste. Third, this invention, through the combination of asymmetrical foolproof guide grooves and elastic self-locking clips, structurally eliminates reverse or incorrect connections. The invention eliminates the risk of loosening and, combined with a high-level waterproof sealing design, greatly improves the reliability and stability of electrical connections. Furthermore, the combined protective and fixing components effectively prevent friction, interference, and excessive bending between the wiring harness and surrounding parts, extending the harness's lifespan. Finally, the modular design allows for flexible addition or removal of functional branches according to the needs of different vehicle configurations, eliminating the need to redevelop the entire wiring harness. This significantly improves the harness's versatility and reusability, effectively shortening the development cycle and reducing R&D and production costs. In summary, this invention is simple in structure, low in cost, and easy to implement, making it highly suitable for mass production applications and possessing broad market prospects. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the low-voltage wiring harness for the front door of the vehicle according to the present invention; Figure 2 This is a schematic diagram of the quick-connect connector structure of the present invention; Figure 3 This is a schematic diagram of the corrugated pipe protection section structure of the present invention; Figure 4 This is a schematic diagram of the wire harness identification label and cable tie limiting point structure of the present invention; Figure 5 This is a schematic diagram of the sheet metal fixing bracket structure of the present invention.

[0018] In the diagram: 1. Front door main wiring harness; 2. Door lock branch wiring harness; 3. Window regulator branch wiring harness; 4. Rearview mirror adjustment branch wiring harness; 5. Speaker branch wiring harness; 6. Ambient light branch wiring harness; 7. Body docking connector; 8. Wiring harness fixing clip; 9. Wear-resistant protective sponge; 10. Branch limit bracket; 11. Connector male terminal; 12. Connector female terminal; 13. Elastic self-locking clip; 14. Asymmetrical foolproof guide groove; 15. Conductive contact terminal; 16. Waterproof sealing ring; 17. Corrugated pipe protective section; 18. Wiring harness identification label; 19. Sheet metal fixing bracket; 20. Cable tie limit point. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0020] This invention provides a vehicle front door low-voltage wiring harness structure that is easy to assemble and maintain. Please refer to [link / reference]. Figures 1-5 The overall design adopts a modular and integrated approach, consisting of five core components: the front door main harness 1, the functional branch harness assembly, the quick-connect connector assembly, the combined protective assembly, and the fixed limiting assembly. Each structural component is precisely matched, with clear division of labor and tight assembly connections. It abandons the structural drawbacks of traditional integrated and non-separable bundled harnesses. All modular components can be prefabricated independently, disassembled and assembled separately, and precisely aligned. It is suitable for all scenarios of standardized operations on the mass production line of car manufacturers and lightweight repair operations in after-sales stores. Among them, the front door main wiring harness 1, as the core carrier for low-voltage electrical signals and power transmission in the front door of the entire vehicle, is arranged in a strictly oriented and orderly manner according to the door inner panel reinforcement structure, the door opening and closing movement trajectory, and the original sheet metal pre-set installation points. It avoids interference areas during door movement, sharp edges of sheet metal, and high-temperature heat-generating areas throughout the entire process, ensuring the long-term stability of the wiring harness from the basic layout level. The functional branch wiring harness assemblies correspond to each independent electrical function such as front door locks, window lifting, and rearview mirror adjustment. They are pre-fabricated as independent wiring harness units and do not require pre-binding and fixing to the main wiring harness. They are quickly and detachably modularly connected and assembled with the front door main wiring harness 1 through a dedicated quick-connect connector assembly. Each functional branch wiring harness is independent and interconnected. Without interference, a single branch failure will not affect the normal operation of other branches and the main wiring harness. The combined protection components and the fixed limit components form an integrated protection and limit working system. The fixed limit components are responsible for the precise positioning, anti-shaking, and anti-displacement constraints of all wiring harness structures. The combined protection components are responsible for the all-round physical and environmental protection of the parts of the wiring harness that are prone to wear, bending, and moisture. With the support of dual protection and limit, it can effectively adapt to the harsh environment such as vibration, bumps, sun exposure, and rain under the complex driving conditions of vehicles. Finally, it forms a brand-new front door low-voltage wiring harness overall structure that is easy and efficient to assemble, convenient for after-sales maintenance, safe and reliable for electrical connection, durable and long service life, and adaptable to mass production of different models of high and low configurations.

[0021] The front door main wiring harness 1 is integrally injection molded with evenly distributed cable tie limiting points 20. The limiting points adopt a raised rigid plastic structure design with pre-set standardized binding positions. Workers do not need to manually locate and bind the cable harness by visual inspection. They only need to bind the fixing auxiliary material at the corresponding limiting points to accurately complete the shaping of the wiring harness. This effectively avoids problems such as misalignment, inconsistent binding tightness, and twisting and deformation of the wiring harness by manual binding, ensuring that the main wiring harness maintains a neat and straight layout throughout the entire process. The outer surface of the front door main wiring harness 1 and all functional branch wiring harness assemblies are prominently marked with wiring harness identification through industrial laser engraving. Label 18 features laser-engraved markings that are permanent, wear-resistant, and will not peel off, fade, or blur. Unlike traditional paper or sticker labels that are easily damaged and detached, these labels accurately indicate the corresponding wiring harness branch function name (e.g., "door lock," "lifter"), wire specifications, material production number, and compatible vehicle models. Simultaneously, the quick-connect connector assembly housing is also engraved with the corresponding matching function identification number. Assembly and maintenance personnel can quickly identify the wiring harness's purpose, connection location, and compatibility specifications through these markings, enabling rapid assembly alignment and troubleshooting without needing to consult drawings. The aforementioned front door main... The end of the main wiring harness 1 is integrally crimped and fixed with the vehicle body docking connector 7. It precisely docks with the main wiring harness of the vehicle body through a snap-fit ​​connection and bolt-assisted fastening. After docking, the contact is tight and the conductive transmission is stable, enabling bidirectional and stable transmission of power supply and control signals between the vehicle body's main control system and all electrical equipment in the front door. The front door main wiring harness 1 internally integrates positive power conductors, negative power conductors, various control signal conductors, and grounding conductors. All conductors are made of high-purity oxygen-free copper conductor material, which has low conductivity, low power and signal transmission loss, and strong resistance to current surges, making it compatible with all front door components. The system ensures a stable power supply for low-voltage electrical equipment over a long period. Meanwhile, the front door main wiring harness 1 employs a multi-layered composite protective covering structure. From the inside out, it consists of a flame-retardant insulating inner layer, an aluminum foil Mylar composite shielding middle layer, and a wear-resistant non-woven fabric protective outer layer. The flame-retardant insulating inner layer effectively prevents wire leakage and short-circuit safety hazards. The aluminum foil Mylar composite shielding middle layer provides comprehensive shielding against electromagnetic interference generated by vehicle electrical appliances during vehicle operation, preventing door control signal transmission distortion and control malfunctions. The wear-resistant non-woven fabric protective outer layer resists minor daily scratches and wear, comprehensively ensuring the safety and stability of the front door main wiring harness 1 during long-term operation.

[0022] The functional branch harness assembly specifically includes five independent functional harness units: door lock branch harness 2, window regulator branch harness 3, rearview mirror adjustment branch harness 4, speaker branch harness 5, and ambient light branch harness 6. Each branch harness is prefabricated independently in the harness production workshop, eliminating the need for on-site cutting, stripping, and crimping, resulting in high standardization and consistency. The conductor cross-section specifications of each branch harness are strictly selected based on the rated power and current of the applied electrical equipment. Low-power signal control branches such as door locks and ambient lights use 0.5mm² to 1.0mm² small-section conductors, while high-power electrical branches such as window regulators, rearview mirror adjustments, and speakers use 1.5mm² to 2.5mm² large-section conductors. This avoids overheating and damage caused by excessively small conductor cross-sections. To prevent material waste and installation space occupation due to excessively large cross-sections, the mating ends of each functional branch harness are integrally fixed to the male connector 11 through injection molding and encapsulation. The connection position is tightly sealed and has high tensile strength, preventing harnesses from detaching or breaking under long-term door opening and closing vibration conditions. Each functional branch harness has an integrally injection-molded branch limiting bracket 10 in the middle section. The branch limiting bracket 10 is precisely matched with the preset installation points on the door sheet metal, eliminating the need for additional drilling and welding. After the snap-fit ​​installation, it can precisely constrain the layout, installation height, and range of motion of the corresponding functional branch harness, completely avoiding collisions, friction, and movement interference between the branch harness and the door interior panel, glass rails, and sheet metal moving parts during door opening and closing and vehicle bumps, reducing the potential for harness wear and damage from the source.

[0023] The quick-connect connector assembly adopts an industrial-grade waterproof and shockproof quick-connect structure design, suitable for the complex, humid, and frequently vibrating installation environment of automotive front doors. The quick-connect connector assembly includes a flexible self-locking latch 13, a detachable and quick-connect mating male connector terminal 11, and a female connector terminal 12. The male connector terminal 11 has a highly conductive tin-plated copper conductive contact terminal 15 embedded and fixed inside. This terminal has excellent conductivity, strong oxidation and corrosion resistance, and stable contact resistance over long-term use, preventing poor contact and signal interruption issues. The male connector terminal 11 is integrated and fixedly connected to the corresponding functional branch wiring harness assembly. The connector female end 12 is pre-molded and fixed at the preset functional docking interface positions of the front door main wiring harness 1, precisely corresponding to the installation points of each functional branch wiring harness. This directly realizes the modular and rapid docking assembly of the functional branch wiring harness assembly and the front door main wiring harness 1, eliminating the need for cumbersome wiring and crimping processes. The docking interface between the connector male end 11 and the connector female end 12 is provided with an asymmetrical anti-foolproof guide groove 14 with a wide and narrow structure. This unique guide insertion trajectory design mechanically forces the connector male end 11 and connector female end 12 to be inserted and assembled only in a single correct direction, completely eliminating the need for incorrect insertion from a physical structural perspective. To prevent improper assembly such as reverse insertion, incorrect insertion, or oblique insertion during the assembly process, and to avoid malfunctions such as burnout of the gate control module and damage to electrical equipment caused by incorrect connection, the elastic self-locking buckle 13 is integrated and injection molded on the upper part of the outer shell of the male connector 11. The buckle has good elastic deformation and reset performance. During manual assembly, the connector is pressed steadily along the anti-foolproof guide groove. After insertion, the elastic self-locking buckle 13 automatically pops up and locks into the preset slot inside the female connector 12, realizing automatic mechanical locking and fixation of the male connector 11 and the female connector 12. After locking, the connection is firm and there is no loose gap, which can effectively resist the bumps and vibrations of vehicle driving. To mitigate the risk of loosening and detachment caused by frequent opening and closing vibrations of the car door, and to ensure long-term stability of the electrical connection, a highly elastic and aging-resistant waterproof sealing ring 16 is embedded and fixed in the slot position inside the connector female end 12. After the connector male end 11 and connector female end 12 are plugged and locked, the waterproof sealing ring 16 is tightly squeezed and adhered, and the mating gap is completely sealed and isolated. The overall protection level reaches the IP67 standard, which can effectively resist water seepage, moisture, and terminal oxidation and corrosion caused by driving in rainy weather, washing the car and driving through water, and condensation inside the car door, ensuring the safety and durability of the electrical connection.

[0024] The modular protection component provides specialized and differentiated protection for key vulnerable areas of the low-voltage wiring harness in the front door of the vehicle, which are prone to wear, bending, and compression. This achieves precise and on-demand protection, avoiding the cost waste caused by redundant protection across the entire area. The modular protection component includes a corrugated tube protective section 17 covering all bending and corner sections of the main wiring harness 1 in the front door, and a wear-resistant protective sponge 9 covering easily abraded areas such as the edges of the wiring harness and the interior trim panels. The corrugated tube protective section 17 is made of high-strength nylon braided corrugated tube material, which has excellent resistance to bending, tension, and sharp scratches, and is compatible with door opening and closing. During the process, the bending deformation of the wiring harness is required to avoid excessive bending and breakage of the main wiring harness wires in the bending section, as well as damage to the outer sheath. At the same time, the corrugated tube material is resistant to high and low temperatures and aging, and will not harden, become brittle and crack under long-term high and low temperature alternating conditions. The wear-resistant protective sponge 9 is made of high-density EVA foam sponge material, which has good cushioning and shock absorption, wear resistance, friction resistance and compression resistance. After being attached to and wrapped around the parts of the wiring harness that are prone to friction, it can effectively buffer the compression and friction forces of the wiring harness caused by vehicle driving vibration, isolate the wiring harness from direct hard contact friction with hard sheet metal and interior panels, significantly reduce the wear rate of the wiring harness outer sheath, and extend the overall service life of the wiring harness.

[0025] The fixing and limiting component provides positioning, anti-shaking, anti-displacement, and anti-pulling constraints for the main front door wiring harness 1 and its functional branch wiring harness assemblies, ensuring accurate positioning and stable operation of all wiring harnesses. The fixing and limiting component includes multiple wiring harness fixing clips 8 for fixing the main front door wiring harness 1 at pre-set points on the door sheet metal. These clips 8 are secured to the pre-drilled mounting holes on the door sheet metal via sheet metal fixing brackets 19, eliminating the need for additional bolts or welding, making installation and disassembly convenient and efficient. The wiring harness fixing clips 8 are evenly spaced at intervals of 150mm to 200mm, a scientifically sound and reasonable spacing arrangement. This design ensures that the wiring harness will not sway or rub due to excessively large clip spacing, nor will it cause redundant parts and complicated assembly due to excessively small spacing. After the clips are installed, the main wiring harness is firmly locked, and the wiring harness will not shift, shake, or be pulled or deformed throughout the entire driving process. The branch limit bracket 10 is fixed to the key limit points of the door sheet metal through clip-on connection. It is specifically used to precisely limit the layout and installation position of each functional branch wiring harness assembly. It strictly controls the industry safety standard that the bending radius of the wiring harness is not less than 10 times the diameter of the wire, completely avoiding wire core breakage and insulation layer damage caused by excessive bending of the wiring harness, and comprehensively ensuring the standardization of wiring harness layout and safety of use.

[0026] In practical use, the standardized mass production assembly process of this invention is simple, convenient, and easy to learn. It does not rely on the experience of senior assembly technicians, and even novices can quickly become proficient in its operation. First, the wiring harness production workshop prefabricates the front door main wiring harness 1 and each independent functional branch wiring harness assemblies in advance according to the vehicle's BOM production list. Simultaneously, all supporting parts such as wiring harness fixing clips 8, quick-connect connector assemblies, and protective accessories are produced. Before assembly, the staff checks the model, specifications, and batch of all materials one by one to ensure that the materials are matched correctly and without damage or defects, laying a solid foundation for subsequent assembly operations. Second, the workshop assembly personnel accurately lay the prefabricated front door main wiring harness 1 along the preset reinforcing rib path of the inner door panel, strictly adhering to the standard spacing of 150mm to 200mm. Using the sheet metal fixing bracket 19 in conjunction with the wiring harness fixing clips 8, the front door main wiring harness 1 is firmly clamped and fixed to the door sheet metal, completing the basic positioning and layout of the main wiring harness. Next, based on the functional information marked on the wiring harness label 18, the assembly personnel precisely align the male connector 11 corresponding to each functional branch wiring harness with the female connector 12 of the same number on the front door main wiring harness 1. They then press steadily downwards along the guide trajectory of the asymmetrical anti-foolproof guide groove 14 until a "click" sound of the elastic self-locking buckle 13 popping up and engaging is heard, confirming that the connection is in place and securely locked. The assembly of a single connector can be completed in just a few seconds, significantly improving assembly efficiency. Subsequently, the wiring harnesses of each functional branch are manually straightened and the branch limiting brackets 10 are snapped into place and inserted into the corresponding branch wiring harnesses, ensuring that all wiring harnesses are free from pulling, interference, and twisting deformation. Next, wear-resistant protective sponges 9 are installed on the easily rubbed contact areas between the wiring harness and the sheet metal and interior panels. A comprehensive inspection of the wiring harness bending radius, assembly gaps, and protective condition is conducted to confirm that there are no contact or interference issues between the wiring harness and surrounding moving or rigid components. Finally, a dedicated vehicle electrical comprehensive tester is used to conduct a full range of tests on the continuity, insulation, grounding reliability, and signal transmission stability of all wiring harness branches in the front door. Once all test items pass the test, the subsequent assembly of the door interior panels can be carried out, thus completing the entire assembly process of the low-voltage wiring harness in the front door of the vehicle.

[0027] In terms of after-sales repair and replacement processes, the modular structure of this invention offers significant advantages. Repairs do not require disassembling the entire vehicle wiring harness or damaging the original binding and protection structure, resulting in low repair thresholds, short processing times, and low costs. When a single door control function malfunction occurs in the front door, such as door lock failure, window lift failure, or ambient light not working, repair personnel can quickly and accurately locate the corresponding faulty functional branch wiring harness by combining the vehicle fault code information with the wiring harness identification label 18, without disassembling unrelated wiring harnesses or body components. Subsequently, only the corresponding faulty branch area of ​​the door interior panel needs to be removed to expose the quick-connect connector assembly corresponding to the faulty branch. The connector locking state can be unlocked by manually pressing the elastic self-locking buckle 13, and the male connector 11 of the faulty functional branch wiring harness can be directly pulled out, completing the quick disassembly of the faulty wiring harness without touching or disassembling the front door main wiring harness or other normally functioning branch wiring harnesses. Next, a brand-new standardized functional branch wiring harness assembly of the same model and specifications is replaced. The male connector 11 of the new wiring harness is aligned with the female connector 12 and inserted and locked along the anti-foolproof guide groove, completing the quick electrical connection and assembly. After assembly, the electrical performance and functional condition of the branch are retested using an electrical tester. Once the fault is confirmed to be eliminated and the function is restored to normal, the wiring harness routing is reorganized, and the protective components and door interior panels are reset to complete the entire repair work. The entire repair operation is simple, requires no professional tools, and will not cause secondary damage to the original intact wiring harness and door sheet metal parts.

[0028] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, as long as there is no structural conflict, the features in the disclosed embodiments can be combined with each other in any manner. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A low-voltage wiring harness structure for the front door of a vehicle that is easy to assemble and maintain, characterized in that, include: Front door main wiring harness (1); At least one functional branch wiring harness assembly; At least one quick-connect connector assembly, the quick-connect connector assembly including a detachably connected male connector end (11) and a female connector end (12), the male connector end (11) being provided with conductive contact terminals (15), the male connector end (11) being fixedly connected to the functional branch harness assembly, and the female connector end (12) being disposed on the front door main harness (1) so that the functional branch harness assembly and the front door main harness (1) form a modular connection.

2. The vehicle front door low-voltage wiring harness structure according to claim 1, characterized in that, An asymmetrical anti-foolproof guide groove (14) is provided at the connection interface between the male connector end (11) and the female connector end (12) to limit the unique insertion direction of the male connector end (11) and the female connector end (12).

3. The vehicle front door low-voltage wiring harness structure according to claim 1, characterized in that, The quick-connect connector assembly also includes a resilient self-locking latch (13), which is integrated into the housing of the male connector (11) and is used to automatically lock after being inserted into place to prevent loosening.

4. The vehicle front door low-voltage wiring harness structure according to claim 1, characterized in that, The female connector end (12) is provided with a waterproof sealing ring (16) inside, which forms a waterproof seal when the male connector end (11) is inserted into the female connector end (12).

5. The vehicle front door low-voltage wiring harness structure according to claim 1, characterized in that, It also includes a combined protective component, which includes a corrugated pipe protective section (17) covering the bending section of the main wiring harness (1) of the front door, and a wear-resistant protective sponge (9) covering the easily rubbed parts.

6. The vehicle front door low-voltage wiring harness structure according to claim 1, characterized in that, It also includes a fixing limit assembly, which includes multiple wiring harness fixing buckles (8) for fixing the front door main wiring harness (1) to the door sheet metal, and the wiring harness fixing buckles (8) are installed on the door sheet metal by a sheet metal fixing bracket (19), and a branch limiting bracket (10) for limiting the direction and position of the functional branch wiring harness assembly.

7. The vehicle front door low-voltage wiring harness structure according to claim 1, characterized in that, The front door main harness (1) is provided with a cable tie limiting point (20) for assisting in harness shaping.

8. The vehicle front door low-voltage wiring harness structure according to claim 1, characterized in that, The front door main harness (1) and the functional branch harness assembly are provided with laser-engraved harness identification labels (18).

9. The vehicle front door low-voltage wiring harness structure according to claim 1, characterized in that, The functional branch harness assembly includes a door lock branch harness (2), a window regulator branch harness (3), a rearview mirror adjustment branch harness (4), a speaker branch harness (5), and an ambient light branch harness (6).

10. A vehicle front door low-voltage wiring harness structure for easy assembly and maintenance according to claim 1, characterized in that, The end of the front door main wiring harness (1) is also fixedly connected to a body docking connector (7) for docking with the body main wiring harness.

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