Side sliding door wire harness corrugated pipe with flow guide structure

Abstract

The invention relates to the technical field of automobile wire harness protection devices, in particular to a side sliding door wire harness corrugated pipe with a flow guide structure, which comprises a corrugated pipe body, a door side end joint and an automobile body side end joint, the door side end joint and the automobile body side end joint are respectively connected to two ends of the corrugated pipe body, and a wire harness sequentially penetrates through the door side end joint, the corrugated pipe body and the automobile body side end joint; a plurality of flow guide plates are integrally formed on the inner wall of the corrugated pipe body, the flow guide plates extend in the axial direction of the corrugated pipe body and are used for guiding accumulated water to flow to the lowest point of a pipeline, and at least one flow guide groove is formed in the tail of each flow guide plate and used for guiding the accumulated water to flow to a drainage hole; the side sliding door wire harness corrugated pipe can realize effective isolation of a wire harness channel and a drainage channel, ensures that accumulated water can be directionally guided and stably discharged, simplifies the assembly and maintenance process, and reduces the maintenance cost, thereby improving the working stability of a side sliding door wire harness, prolonging the service life of the side sliding door wire harness, and ensuring the operation safety of a vehicle electrical system.

Description

Technical Field

[0001] This invention relates to the field of automotive wiring harness protection devices, and specifically to a side sliding door wiring harness corrugated tube with a flow guiding structure. Background Technology

[0002] In automotive sliding door structures, wiring harness corrugated tubes are protective components used for integrated wiring harness installation. During use, these tubes undergo long-stroke, high-frequency reciprocating motions with the door, resulting in complex movements and harsh working environments. Currently, traditional wiring harness corrugated tubes commonly suffer from water accumulation, poor drainage, and inconvenient maintenance. Long-term use can easily lead to wiring harness aging, corrosion, and electrical faults, severely impacting the stability, safety, and lifespan of the vehicle's electrical system, making it difficult to meet the high reliability and long lifespan requirements of automobiles. 1. Traditional corrugated pipes do not have a dedicated drainage channel inside. Water can easily accumulate and remain in low-lying and bending areas after entering the pipe. At the same time, water accumulation will accelerate the aging of the wire harness insulation layer and the corrosion of the conductor, which can easily cause short circuits and electrical malfunctions, posing obvious safety hazards. 2. Conventional drainage solutions often use simple openings, and the drainage point changes with the movement of the vehicle door, making it impossible to guarantee that it is always at the lowest position in the pipeline, thus making it difficult to achieve stable and reliable drainage. Some structures share drainage channels with wiring harness channels, which can easily lead to problems such as wiring harnesses blocking water flow and interference between sealing and drainage, resulting in low drainage efficiency, poor sealing effect, and an inability to fundamentally solve the water accumulation problem; 3. Traditional corrugated pipe joints mostly use adhesive or bolt fastening methods. The disassembly and assembly process requires the removal of a large number of interior parts, which is complicated, time-consuming, and easy to damage the interior parts. The maintenance cost of subsequent inspection and pipe cleaning is high.

[0003] In summary, the existing side sliding door wiring harness corrugated pipe cannot simultaneously achieve water drainage, reliable drainage, functional isolation, and convenient maintenance, making it difficult to meet the high reliability and long service life requirements of automobiles. Therefore, there is an urgent need for a new type of wiring harness protection structure with a more reasonable structure and more stable performance. Summary of the Invention

[0004] The purpose of this invention is to provide a side sliding door wiring harness corrugated pipe with a flow guiding structure. This side sliding door wiring harness corrugated pipe can effectively isolate the wiring harness channel and the drainage channel, ensure that the accumulated water can be directed and discharged stably, simplify the assembly and maintenance process, reduce maintenance costs, thereby improving the working stability and service life of the side sliding door wiring harness and ensuring the safe operation of the vehicle's electrical system.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A side sliding door wiring harness corrugated tube with a guide groove structure includes a corrugated tube body, a door-side end connector and a vehicle-side end connector respectively connected to both ends of the corrugated tube body, and the wiring harness passes through the door-side end connector, the corrugated tube body and the vehicle-side end connector in sequence. The inner wall of the corrugated pipe body is integrally formed with multiple guide plates, which extend along the axial direction of the corrugated pipe body to guide the water to flow towards the lowest point of the pipe. At least one guide groove is provided at the end of the guide plate to guide the water to the drain hole. The vehicle side end joint is fixedly installed on the vehicle body sheet metal. A drain hole is provided at the bottom of the vehicle side end joint. The drain hole is connected to the end of the guide groove to form a drainage channel from the inside of the corrugated pipe body to the outside of the vehicle. The inner wall guide plate and the guide groove are set at an angle to facilitate the directional flow of water. The angle range is 45°-75°. The vehicle side end connector is also equipped with a rubber umbrella-shaped one-way valve and a guide installation structure. The guide installation structure is a fixing lug for the vehicle side end connector, which is used to ensure that the drain hole always faces the ground and is at the lowest position of the entire corrugated pipe after installation. The rubber umbrella-shaped one-way valve only allows accumulated water to be discharged from the inside of the pipe to the outside, preventing external mud and water from flowing back in. The vehicle body side end connector adopts a dual-channel separation structure with center wire passing and bottom drainage. The wire harness passes through the wire passing hole in the center of the connector, and the drainage channel is independently set at the bottom of the connector. The sealing structure and the drainage channel do not interfere with each other. A vent is provided at the upper part of the door side end connector to balance the air pressure inside the corrugated pipe and the outside, avoid the formation of a water seal, and help improve drainage efficiency.

[0006] Furthermore, the guide plate is a fan-shaped structure, and the guide plate is evenly staggered on both sides of the inner wall of the corrugated pipe body. The inner wall of the corrugated pipe body is also provided with an inner wall guide groove that cooperates with the guide plate to guide the directional flow of accumulated water.

[0007] Furthermore, the corrugated pipe body is connected to the door side end connector and the body side end connector using a snap-on quick-release connection structure. The snap-on quick-release connection structure includes an outer retaining ring at the end of the corrugated pipe body and an inner retaining groove on the inner wall of the connector. The retaining ring and the retaining groove are interference fit, and can be unlocked by pressing. Disassembly and assembly can be completed without special tools, and it also has a sealing and waterproof effect.

[0008] Furthermore, the corrugated pipe body adopts a double-layer co-extruded material structure. The inner layer of the corrugated pipe body is made of hydrophobic polypropylene (PP) material with a thickness of 0.3mm, and the outer layer of the corrugated pipe body is made of wear-resistant and anti-aging thermoplastic vulcanized rubber (TPV) material with a thickness of 0.5mm.

[0009] Furthermore, the vehicle body side end connector adopts a soft and hard composite injection molding structure. The hard rubber part is polyamide 66 (PA66) to provide structural strength, and the soft rubber part is ethylene propylene diene monomer (EPDM) rubber to provide sealing and waterproof performance. A splash guard is provided at the front end of the vehicle body side end connector.

[0010] Furthermore, the diameter of the drainage hole is 3mm-5mm, and the drainage hole is filled with absorbent cotton or capillary fibers. The capillary action helps to draw out the water accumulated in the corrugated pipe body. Combined with the vent hole of the end connector on the side of the car door, the drainage smoothness is improved.

[0011] Furthermore, the diameter of the vent hole is 1 mm.

[0012] Furthermore, a guide pipe is provided below the drain hole of the end connector on the side of the vehicle body. The guide pipe is vertically aligned with the drain hole of the body sheet metal to guide the accumulated water directly to the outside of the vehicle and avoid secondary water accumulation inside the vehicle body.

[0013] The beneficial effects of this invention are as follows: The overall structural design of the side sliding door wiring harness corrugated pipe with a guide groove structure is scientific, and the installation, operation and use are simple and convenient. Compared with the existing side sliding door wiring harness corrugated pipes, this invention has the following characteristics and advantages in specific use: 1. This invention places the drain hole, rubber umbrella-shaped one-way valve, and guide installation structure all at the vehicle body side end joint of the fixed end of the vehicle body. The door side end joint only has a vent hole and no drainage structure, which completely avoids the drainage failure problem caused by the change in the height of the drain hole during the opening and closing of the sliding door. The guide installation structure forces the drain hole to always be at the lowest position of the pipeline, which fundamentally solves the industry pain point that the water outlet is higher than the water level. With the help of the guide plate and the inner wall guide groove, water accumulation is completely eliminated. 2. This invention achieves directional guidance of accumulated water through the guide plate and guide groove on the inner wall of the corrugated pipe body. Combined with the dual-channel separation structure of the end connector on the side of the vehicle body, it achieves complete isolation between the wiring harness and the drainage channel. The wiring harness does not come into contact with accumulated water throughout the process, which fundamentally avoids the risk of wiring harness immersion corrosion and short circuit, and greatly improves the reliability of the side sliding door electrical system and driving safety. 3. This invention achieves one-way drainage through a rubber umbrella-shaped one-way valve, effectively preventing backflow of external mud, water, and dust; the absorbent cotton or capillary fibers inside the drainage hole assist drainage through capillary action, and the air pressure inside and outside the pipe is balanced by the vent hole of the door side end connector, avoiding water seal problems and further improving drainage stability; the double-layer co-extruded material structure of the corrugated pipe body and the soft and hard composite sealing structure of the vehicle side end connector take into account the wear resistance, hydrophobicity and sealing reliability of the pipeline, extending the service life of the product; 4. The invention adopts a snap-on quick-release connection structure, which can complete the disassembly and assembly of the corrugated pipe body and the connectors at both ends without special tools, greatly reducing the difficulty and cost of subsequent pipe cleaning, debris removal and replacement of vulnerable parts; at the same time, the design of the anti-splash plate and the guide pipe further optimizes the drainage effect, avoids secondary water accumulation, and has a simple structure and strong practicality, which is suitable for the protection of the side sliding door wiring harness of various car models. Attached Figure Description

[0014] Figure 1 This is a structural diagram of the overall installation state of the present invention; Figure 2 This is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the axial cross-sectional structure of the bellows body of the present invention; Figure 4 This is a schematic diagram of the radial cross-sectional structure of the vehicle body side end connector of the present invention; The markings in the diagram are as follows: 1-Side end connector of the vehicle body; 2-Bellboard body; 3-Side end connector of the door; 4-Rubber umbrella-shaped one-way valve; 5-Sliding door sheet metal; 6-Vehicle body sheet metal; 7-Guide pipe; 8-Vent hole of the side end connector of the door; 101-Guide mounting structure; 102-Drain hole; 103-Splash guard; 104-Wire hole; 105-Drainage channel; 201-Inner wall guide plate; 202-Guide groove; 203-Snap-on quick-release connection structure. Detailed Implementation

[0015] Specific Embodiment 1: The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. It should be noted that: In the present invention, unless otherwise specified, all embodiments and preferred methods mentioned herein can be combined with each other to form new technical solutions. In the present invention, unless otherwise specified, all technical features and preferred features mentioned herein can be combined with each other to form new technical solutions. Unless otherwise specified, the professional and scientific terms used herein have the same meaning as those familiar with the art. Furthermore, any methods or materials similar to or equivalent to the content described herein can also be applied to the present invention.

[0016] As per the specification attached to this invention Figures 1 to 4As shown, in order to solve the problems of water accumulation, poor drainage, inconvenient maintenance, and easy aging, corrosion and electrical failure of traditional wire harness corrugated pipes, which seriously affect the stability, safety and service life of vehicle electrical systems, this invention designs a side sliding door wire harness corrugated pipe with a guide channel structure and its drainage system. The core structure mainly includes a corrugated pipe body 2, a door side end connector 3 and a body side end connector 1. The door side end connector 3 is fixed to the side sliding door sheet metal 5, and the body side end connector 1 is fixed to the body sheet metal 6 of the side wall of the vehicle. The corrugated pipe body 2 is connected between the two connectors. The wire harness passes through the door side end connector 3, the corrugated pipe body 2 and the body side end connector 1 in sequence to realize the connection between the side sliding door electrical components and the main wire harness of the vehicle body.

[0017] As per the specification attached to this invention Figure 3 As shown, a plurality of staggered and evenly distributed guide plates 201 are integrally formed on the inner wall of the corrugated pipe body 2, with a spacing of 20 mm between the guide plates 201. The guide plates 201 extend continuously along the axial direction of the corrugated pipe body 2. At the same time, an inner wall guide groove 202 that cooperates with the guide plates 201 is integrally formed on the inner wall of the corrugated pipe body 2. The inner wall guide plates 201 and the guide groove 202 are set at an angle to ensure that the water that seeps into the pipe can continuously collect towards the lowest point of the end connector 1 on the side of the vehicle body along the guide plates 201 and the inner wall guide groove 202.

[0018] The corrugated pipe body 2 adopts a double-layer co-extruded material structure. The inner layer of the corrugated pipe body 2 is a hydrophobic polypropylene (PP) layer with a thickness of 0.3mm, which reduces the adhesion of water to the inner wall of the pipe and improves the flow rate of water. The outer layer of the corrugated pipe body 2 is a thermoplastic vulcanized rubber (TPV) wear-resistant and anti-aging layer with a thickness of 0.5mm, which improves the weather resistance, bending resistance and wear resistance of the pipeline, and is suitable for the working conditions of the reciprocating motion of the side sliding door. The side end connector 1 of the vehicle body is made of polyamide 66 (PA66) hard rubber and ethylene propylene diene monomer (EPDM) soft rubber composite injection molding. The hard rubber part constitutes the main body of the connector, providing structural strength, while the soft rubber part is integrated into the sealing part for sealing and waterproofing.

[0019] As per the specification attached to this invention Figure 2 As shown, a drain hole 102 is opened at the bottom of the connector. The diameter of the drain hole 102 is 4mm. The drain hole 102 is precisely connected to the end of the guide groove 202 inside the corrugated pipe body 2 to form a continuous drainage channel 105 without bends. A rubber umbrella-shaped one-way valve 4 is installed in the drain hole 102. The opening pressure of the rubber umbrella-shaped one-way valve 4 is 35Pa, which only allows water to be discharged from the inside of the pipe to the outside, completely blocking the backflow path of external mud, water and dust.

[0020] As per the specification attached to this invention Figure 2As shown, two foolproof guide mounting structures 101 are provided on the end connector 1 on the side of the vehicle body. That is, the fixing ears of the end connector on the side of the vehicle body are precisely matched with the mounting holes of the body sheet metal 6. During installation, the drain hole 102 can be forced to always face the ground, ensuring that the drain hole 102 is permanently at the lowest position of the entire corrugated pipe.

[0021] The side-end connector 1 adopts a dual-channel separation structure with a center-passing wire and a bottom-draining wire. A wire harness passage hole 104 is set in the center of the connector, and an integrally injection-molded EPDM rubber sealing sleeve is integrated inside the passage hole 104. The sealing sleeve tightly grips the outer sheath of the wire harness, achieving a radial seal between the wire harness and the connector. Simultaneously, a splash guard 103 is integrally formed at the front end of the side-end connector 1. The splash guard 103 is arc-shaped and covers the outside of the passage hole 104, effectively preventing mud and water from splashing from the body sheet metal 6 to the passage hole 104, protecting the internal structure of the connector.

[0022] As per the specification attached to this invention Figure 3 As shown, the door side end connector 3 is injection molded from polyamide (66PA66). A 1mm diameter vent hole 8 is opened at the top of the connector to allow the corrugated pipe to communicate with the atmosphere, balancing the air pressure inside and outside the pipe, preventing water seal formation during water flow, and improving drainage efficiency. The connection end between the door side end connector 3 and the corrugated pipe body 2 is provided with an inner groove, which cooperates with the outer retaining ring at the end of the corrugated pipe body 2 to form a snap-on quick-release connection structure 203.

[0023] It should be noted that the drain hole 102 is filled with hydrophilic absorbent cotton, which uses capillary action to help draw out the water accumulated in the pipe. Even if the drain hole 102 is slightly higher than the water level, it can still assist in drainage. An integrally formed guide pipe 7 is provided below the drain hole 102 of the side end connector 1 of the vehicle body. The guide pipe 7 is vertically aligned with the drain hole of the body sheet metal 6, so that the water can be directly discharged outside the vehicle under the action of gravity, avoiding secondary water accumulation inside the vehicle body. Both ends of the corrugated pipe body 2 are integrally formed with external retaining rings, which are press-fitted with the inner retaining grooves on the inner wall of the door side end connector 3 and the body side end connector 1, respectively, to form a snap-on quick-release connection structure 203. Pressing the unlocking part of the external retaining ring can unlock it. Disassembly and assembly can be completed without special tools, which is convenient for cleaning debris inside the pipe and replacing the rubber umbrella-shaped one-way valve 4 and absorbent cotton.

[0024] The working principle of this embodiment is as follows: When rainwater seeps into the corrugated pipe body 2 through the gap in the car door, the water accumulates into the inner wall under the action of gravity. Under the guidance of the inner wall guide plate 201, it continues to converge along the guide groove 202 towards the lowest point of the pipeline - the end joint 1 on the side of the vehicle body. Part of the accumulated water directly pushes the rubber umbrella-shaped one-way valve 4 under the action of gravity and is discharged directly into the outside of the vehicle through the drain hole 102 and the guide pipe 7. The other part is sucked out by the capillary action of the water-absorbing cotton / capillary fiber in the drain hole 102 and then discharged into the outside of the vehicle through the rubber umbrella-shaped one-way valve 4 and the guide pipe 7. The wiring harness passes through the central hole 104 of the side-end connector 1, the central area of ​​the corrugated pipe body 2, and the door-side connector 3, completely isolated from the bottom drainage channel 105, preventing contact with accumulated water. During door opening and closing, the side-end connector 1 is always fixed to the body sheet metal 6 via the guide mounting structure 101, and the drainage hole 102 is permanently at the lowest position of the pipeline, not rising with door movement, completely avoiding drainage failure. The vent 8 of the door-side connector 3 continuously balances the air pressure inside and outside the pipe, preventing the formation of a water seal during water flow and ensuring smooth drainage. The guide plate 201 and the inner wall guide groove 202 on the inner wall of the corrugated pipe body 2 guide the water in a directional manner. Combined with the dual-channel separation structure of the side-end connector 1, the wiring harness is completely isolated from the drainage channel, preventing the wiring harness from contacting accumulated water throughout the entire process. This fundamentally avoids the risk of wiring harness immersion corrosion and short circuits, significantly improving the reliability and driving safety of the sliding door electrical system.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A corrugated pipe for a sliding door wiring harness with a flow guide groove structure, characterized in that, Includes a bellows body (2), a door-side end connector (3) and a body-side end connector (1) respectively connected to both ends of the bellows body (2), and the wire harness passes through the door-side end connector (3), the bellows body (2) and the body-side end connector (1) in sequence. The inner wall of the corrugated pipe body (2) is integrally formed with multiple guide plates (201). The guide plates (201) extend along the axial direction of the corrugated pipe body (2) to guide the water to flow to the lowest point of the pipe. At least one guide groove (202) is provided at the end of the guide plate (2) to guide the water to the drain hole. The vehicle side end connector (1) is fixedly installed on the vehicle body sheet metal (6). The bottom of the vehicle side end connector (1) is provided with a drain hole (102). The drain hole (102) is connected to the end of the guide groove (202) to form a drainage channel (105) from the inside of the corrugated pipe body (2) to the outside of the vehicle. The inner wall guide plate (201) and the guide groove (202) are set at an angle to facilitate the directional flow of water. The angle range is 45°-75°. The vehicle side end connector (1) is also provided with a rubber umbrella-shaped one-way valve (4) and a guide installation structure (101). The guide installation structure (101) is a fixing lug for the vehicle side end connector, used to ensure that the drain hole (102) always faces the ground and is at the lowest position of the entire corrugated pipe after installation. The rubber umbrella-shaped one-way valve (4) only allows water to be discharged from the inside of the pipe to the outside, preventing external mud and water from flowing back in. The vehicle side end connector (1) adopts a dual-channel separation structure with center wire passing and bottom drainage. The wire harness passes through the wire passing hole (104) in the center of the connector, and the drainage channel (105) is independently set at the bottom of the connector. The sealing structure and the drainage channel (105) do not interfere with each other. A vent hole (8) is provided at the upper part of the door side end connector (3) to balance the air pressure inside the corrugated pipe and the outside, avoid the formation of a water seal, and help improve drainage efficiency.

2. The corrugated pipe for a sliding door wiring harness with a flow guide groove structure according to claim 1, characterized in that, The guide plate (201) is a fan-shaped structure. The guide plate (201) is evenly staggered and distributed on both sides of the inner wall of the corrugated pipe body (2). The inner wall of the corrugated pipe body (2) is also provided with an inner wall guide groove (202) that cooperates with the guide plate (201) to guide the directional flow of accumulated water.

3. The corrugated pipe for a sliding door wiring harness with a flow guide groove structure according to claim 2, characterized in that, The corrugated pipe body (2) is connected to the door side end connector (3) and the body side end connector (1) by a snap-on quick-release connection structure (203). The snap-on quick-release connection structure (203) includes an outer snap ring at the end of the corrugated pipe body (2) and an inner snap groove on the inner wall of the connector. The snap ring and the snap groove are interference fit, and can be unlocked by pressing. No special tools are required to complete the disassembly and assembly, and it has a sealing and waterproof effect.

4. The corrugated pipe for a sliding door wiring harness with a flow guide groove structure according to claim 1, characterized in that, The corrugated pipe body (2) adopts a double-layer co-extruded material structure. The inner layer of the corrugated pipe body (2) is a hydrophobic polypropylene material with a thickness of 0.3 mm, and the outer layer of the corrugated pipe body (2) is a wear-resistant and anti-aging thermoplastic vulcanized rubber material with a thickness of 0.5 mm.

5. The corrugated pipe for a sliding door wiring harness with a flow guide groove structure according to claim 4, characterized in that, The vehicle side end connector (1) adopts a soft and hard composite injection molding structure. The hard rubber part is polyamide, which is used to provide structural strength, and the soft rubber part is EPDM rubber, which is used to provide sealing and waterproof performance. A splash guard (103) is provided at the front end of the vehicle side end connector (1).

6. The corrugated pipe for a sliding door wiring harness with a flow guide groove structure according to claim 1, characterized in that, The diameter of the drainage hole (102) is 3mm-5mm. The drainage hole (102) is filled with absorbent cotton or capillary fibers. The capillary action helps to draw out the water accumulated in the corrugated pipe body (2). Combined with the vent hole (8) of the door side end connector (3), the drainage smoothness is improved.

7. The corrugated pipe for a sliding door wiring harness with a flow guide groove structure according to claim 6, characterized in that, The diameter of the vent (8) is 1 mm.

8. The corrugated pipe for a sliding door wiring harness with a flow guide groove structure according to claim 1, characterized in that, A guide pipe (7) is provided below the drain hole (102) of the end connector (1) on the side of the vehicle body. The guide pipe (7) is vertically aligned with the drain hole of the body sheet metal (6) to guide the accumulated water directly to the outside of the vehicle and avoid secondary water accumulation inside the vehicle body.

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