A fixing structure for improving signal transmission reliability of a commercial vehicle chassis wire harness

Abstract

The application discloses a fixing structure for improving signal transmission reliability of a commercial vehicle chassis wire harness, which comprises a male connector assembly and a female connector assembly which are mutually plugged, a male wire connected with the male connector assembly, and a female wire connected with the female connector assembly, wherein the plugging part of the male connector assembly and the female connector assembly, the male wire close to one end of the male connector assembly, and the female wire close to one end of the female connector assembly are all fixed on a middle fixing support. The plugging part of the male and female connectors and the closest wire harness fixing points on the left and right sides thereof are designed on the same fixing support, so that synchronous vibration of the three fixing points is ensured, the male and female connectors are prevented from loosening, the influence of the external environment on the wire harness and the connectors is reduced or avoided, and the reliability of the plugging of the connectors is ensured.

Description

Technical Field

[0001] This invention relates to the field of commercial vehicle chassis structure technology, specifically to a fixed structure for improving the reliability of signal transmission in commercial vehicle chassis wiring harnesses. Background Technology

[0002] With the continuous upgrading of national emission regulations, the number of sensors and controllers required for commercial vehicle chassis is increasing. Simultaneously, with the development of electronic and electrical architecture and the evolving customer needs, controller technology is gradually shifting from central control to domain control. As the number of controllers increases, the space in the cab can no longer meet the needs of controller placement. Furthermore, driven by cost reduction, controllers used in the chassis and powertrain domains are gradually being moved from the cab to the chassis itself. As the vehicle's neural network, the reliability of the wiring harness directly affects the overall vehicle reliability. With continuously upgrading demands, customers are increasingly requiring higher reliability for the vehicle's electrical functions. However, because the chassis environment is far harsher than the cab, the reliability design of wiring harness signal transmission becomes even more crucial as more controllers are placed in the chassis.

[0003] Patent application number 201721181224.2, entitled "Automotive Chassis Wiring Harness Fixing Frame and Automobile," discloses an automotive chassis wiring harness fixing frame and automobile, relating to the technical field of automotive parts. The automotive chassis wiring harness fixing frame includes a fixing frame body, a first locking member for fixing high-voltage wires inside the chassis, a second locking member for fixing water pipes inside the chassis, and a third locking member for fixing parking cables inside the chassis. The fixing frame body is connected to the floor plate inside the automotive chassis. The first, second, and third locking members are sequentially connected to one side of the fixing frame body. The first, second, and third locking members connect the high-voltage wires, water pipes, and parking cables inside the chassis to the fixing frame body, respectively.

[0004] Patent application number 201810031456.2, entitled "A Fixing Bracket for a Radar Wire Harness and an Automobile," discloses a fixing bracket for a radar wire harness and an automobile including the fixing bracket for the radar wire harness. This invention provides a fixing bracket for a radar wire harness, including a bracket body, a radar mounting base, and a wire harness fixing part. The first end of the bracket body is provided with the radar mounting base, and the second end of the bracket body is provided with the wire harness fixing part. The radar mounting base is used to mount a radar module, and the wire harness fixing part is used to fix the radar wire harness. The radar wire harness is connected to the radar module via a connector; the position of the wire harness fixing part is lower than the position of the connector.

[0005] The aforementioned comparison documents have the following problems:

[0006] 1. Under vehicle vibration, relative movement can easily occur between the male and female terminals of the connector, causing terminal wear or deformation, which in turn leads to poor contact;

[0007] 2. When the connector end wire harness has no fixing point or the fixing point is far from the connector end, under vibration in the vehicle or when the wire harness is taut and pulled by external force, the wire harness will exert tension on the terminal, causing the terminal to deform and resulting in poor contact.

[0008] 3. Due to non-standard wiring harness layout, unreasonable fixing point design, and unreasonable selection, water may enter the wiring harness and connectors, which may result in functional failure or even vehicle damage, posing a significant risk. Summary of the Invention

[0009] The purpose of this invention is to overcome the shortcomings of the aforementioned background technology and provide a fixing structure that can improve the reliability of signal transmission of wiring harnesses in commercial vehicle chassis by ensuring the stability of connector male and female terminal connections, standardized wiring harness layout, and reasonable fixing point design.

[0010] To achieve this objective, the present invention provides a fixed structure for improving the reliability of signal transmission in the wiring harness of a commercial vehicle chassis. This structure includes a male connector assembly and a female connector assembly that are plugged into each other, as well as a male wire connected to the male connector assembly and a female wire connected to the female connector assembly. The plug-in points of the male connector assembly and the female connector assembly, the male wire near one end of the male connector assembly, and the female wire near one end of the female connector assembly are all fixed on a central fixed bracket.

[0011] Furthermore, the central fixing bracket includes a central fixing plate, a male wire fixing plate fixedly connected to the central fixing plate and extending towards the male wire, and a female wire fixing plate fixedly connected to the central fixing plate and extending towards the female wire; the insertion point of the male connector assembly and the female connector assembly is fixed to the central fixing plate, the male wire near one end of the male connector assembly is fixed to the male wire fixing plate, and the female wire near one end of the female connector assembly is fixed to the female wire fixing plate.

[0012] Furthermore, a snap-fit ​​hole is provided on the middle fixing plate, and the head end of the male connector assembly passes through the snap-fit ​​hole and is inserted into the female connector assembly, and the male connector assembly is fixed in the snap-fit ​​hole.

[0013] Furthermore, the male wire near one end of the male connector assembly is fixed to the male wire fixing plate by a first fixing structure or a second fixing structure; the female wire near one end of the female connector assembly is also fixed to the female wire fixing plate by the first fixing structure or the second fixing structure.

[0014] Furthermore, both the male and female conductors are housed within a corrugated pipe; the first fixing structure includes a cable tie attached to the corrugated pipe, which is fixed to either the male conductor fixing plate or the female conductor fixing plate.

[0015] Furthermore, the second fixing structure includes two structural forms:

[0016] Structure Form 1: Both the male and female conductors comprise multiple wire harnesses; the second fixing structure includes a wire harness fixing block, comprising an upper wire harness fixing block and a lower wire harness fixing block arranged vertically. The bottom surface of the upper wire harness fixing block has multiple semi-cylindrical grooves that mate with the wire harnesses, and the top surface of the lower wire harness fixing block has multiple semi-cylindrical grooves that mate with the wire harnesses. The upper and lower wire harness fixing blocks are secured by wire harness cable ties, and the wire harnesses are fixed within the cylindrical grooves formed by the semi-cylindrical grooves of the upper and lower wire harness fixing blocks; the wire harness cable ties are fixed to the male conductor fixing plate or the female conductor fixing plate.

[0017] Furthermore, the wire harness fixing block, the section of the male wire fixing plate fixed with the wire harness cable tie, or the section of the female wire fixing plate fixed with the wire harness cable tie are all disposed inside the protective cover.

[0018] Structure Form Two: Both the male and female conductors comprise multiple wire harnesses; the second fixing structure includes a wire harness fixing ring, which includes wire harness fixing rods arranged internally and externally, and a wire harness fixing ring with a notch, coaxially sleeved on the wire harness fixing rods. Multiple semi-cylindrical grooves that mate with the wire harnesses are spaced apart on the outer circumference of the wire harness fixing rods, and multiple semi-cylindrical grooves that mate with the wire harnesses are opened on the inner circumference of the wire harness fixing rings. The wire harness fixing rods and the wire harness fixing rings are bound together and fixed by wire harness cable ties. The wire harnesses are fixed within the cylindrical groove formed by the semi-cylindrical grooves of the wire harness fixing rods and the semi-cylindrical grooves of the wire harness fixing rings; the wire harness cable ties are fixed to the male conductor fixing plate or the female conductor fixing plate.

[0019] Furthermore, the wire harness fixing ring, the section of the male wire fixing plate fixed with the wire harness cable tie, or the section of the female wire fixing plate fixed with the wire harness cable tie are all disposed inside the protective cover.

[0020] Furthermore, the male wires near one end of the male connector assembly are arranged at a height below the male connector assembly, and the female wires near one end of the female connector assembly are arranged at a height below the female connector assembly.

[0021] The beneficial effects of this invention are as follows: The male and female connector insertion points and the nearest wire harness fixing points on their left and right sides are designed on the same fixing bracket. Since all three fixing points are located on the same bracket, synchronous vibration of the three fixing points is ensured, preventing loosening of the male and female connectors, reducing or avoiding the influence of external factors on the wire harness and connector, and ensuring the reliability of the connector insertion. The wire segment closest to the male and female connector is located below the connector, ensuring that water does not flow into the connector's interior or accumulate at the connector's tail, preventing long-term water accumulation at the connector's tail and thus preventing water ingress. The wires can be fixed using wire harness fixing blocks, wire harness fixing rings, or wire harness straps, offering diverse structures. Different fixing structures can be selected according to different wire segments, ensuring optimal wire fixing effect and stability while also minimizing costs. Attached Figure Description

[0022] Figure 1 This is a perspective view of the conductors arranged horizontally at 180° in this invention;

[0023] Figure 2 This is a front view of the conductors arranged horizontally at 180° in this invention;

[0024] Figure 3 This is a front view of the connection between the wire harness fixing block and the wire harness in this invention;

[0025] Figure 4 This is a vertical cross-sectional view of the connection between the wire harness fixing block and the wire harness in this invention;

[0026] Figure 5 This is a vertical cross-sectional view of the lower wire harness fixing block in this invention;

[0027] Figure 6 This is a front view of the connection between the wire harness fixing ring and the wire harness in this invention;

[0028] Figure 7 This is a vertical cross-sectional view of the connection between the wire harness fixing ring and the wire harness in this invention;

[0029] Figure 8 This is a vertical cross-sectional view of the conductor fixed to the male conductor fixing plate in this invention;

[0030] Figure 9 This is a perspective view of the protective cover in this invention;

[0031] Figure 10 This is a perspective view of the conductors arranged horizontally at 90° in this invention;

[0032] Figure 11 This is a front view of the conductors arranged horizontally at 90° in this invention;

[0033] Among them, 1—male connector assembly, 2—female connector assembly, 3—male wire, 4—female wire, 5—middle fixing bracket (5.1—middle fixing plate, 5.2—male wire fixing plate, 5.3—female wire fixing plate), 6—corrugated tube, 7—wire harness cable tie, 8—wire harness, 9—wire harness fixing block (9.1—upper wire harness fixing block, 9.2—lower wire harness fixing block), 10—protective cover, 11—wire harness fixing ring (11.1—wire harness fixing rod, 11.2—wire harness fixing ring), 12—outer shell, 13—filler, 14—connecting rib, 15—slot, 16—opening, 17—buckle. Detailed Implementation

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0035] like Figure 1 The fixed structure shown in Figure 2, which improves the reliability of signal transmission of wiring harness in commercial vehicle chassis, includes a male connector assembly 1 and a female connector assembly 2 that are plugged into each other, a male wire 3 connected to the male connector assembly 1 and a female wire 4 connected to the female connector assembly 2. The plug-in points of the male connector assembly 1 and the female connector assembly 2, the male wire 3 near the male connector assembly 1 and the female wire 4 near the female connector assembly 2 are all fixed on the central fixed bracket 5. The central fixing bracket 5 includes a central fixing plate 5.1, a male wire fixing plate 5.2 fixedly connected to the central fixing plate 5.1 and extending towards the male wire 3, and a female wire fixing plate 5.3 fixedly connected to the central fixing plate 5.1 and extending towards the female wire 4. The insertion points of the male connector assembly 1 and the female connector assembly 2 are fixed to the central fixing plate 5.1. Specifically, the central fixing plate 5.1 has a snap-fit ​​hole, through which the head end of the male connector assembly 1 passes and inserts into the female connector assembly 2. A nut is threaded onto the portion of the male connector assembly 1 that passes through the snap-fit ​​hole, and the portion of the male connector assembly 1 that does not pass through the snap-fit ​​hole restricts the movement of the central fixing plate 5.1 to the left (e.g., ...). Figure 1As shown in Figure 2, with the male wire 3 side on the left and the female wire 4 side on the right, a limiting structure is formed. The nut presses the middle fixing plate 5.1 onto the limiting structure, forming a fixing structure between the middle fixing plate 5.1 and the male connector assembly 1. The male wire 3, which is closer to the male connector assembly 1, is fixed on the male wire fixing plate 5.2, and the female wire 4, which is closer to the female connector assembly 2, is fixed on the female wire fixing plate 5.3.

[0036] Both the male conductor 3 and the female conductor 4 include multiple wire bundles 8, and both the male conductor 3 and the female conductor 4 are housed inside the corrugated pipe 6.

[0037] like Figure 1 —2 and Figure 8 As shown, the male wire 3 near one end of the male connector assembly 1 is fixed to the male wire fixing plate 5.2 by a first fixing structure, including a wire harness cable tie 7 tied to the corrugated tube 6, which is fixed to the male wire fixing plate 5.2.

[0038] Similarly, the female wire 4 near one end of the female connector assembly 2 can also be fixed to the female wire fixing plate 5.3 by the first fixing structure: including the wire harness cable tie 7 tied to the corrugated pipe 6, which is fixed to the female wire fixing plate 5.3.

[0039] In this invention, the female lead wire 4 near the female connector assembly 2 can also be fixed to the female lead wire fixing plate 5.3 by a second fixing structure. The second fixing structure can be used at any fixing point, not limited to the female lead wire 4, and can be set according to actual needs and cost factors.

[0040] The second fixed structure has two structural forms:

[0041] Structural Form 1: such as Figure 1As shown in Figure 5, the second fixing structure includes a wire harness fixing block 9, which includes an upper wire harness fixing block 9.1 and a lower wire harness fixing block 9.2 arranged vertically (the upper wire harness fixing block 9.1 and the lower wire harness fixing block 9.2 can be a symmetrical structure or an asymmetrical structure; this invention uses a symmetrical structure as an example for illustration). The bottom surface of the upper wire harness fixing block 9.1 has multiple semi-cylindrical grooves that mate with the wire harness 8, and the top surface of the lower wire harness fixing block 9.2 has multiple semi-cylindrical grooves that mate with the wire harness 8. The upper wire harness fixing block 9.1 and the lower wire harness fixing block 9.2 are fixed by wire harness cable ties 7. The wire harness 8 is fixed in the cylindrical groove formed by the semi-cylindrical grooves of the upper wire harness fixing block 9.1 and the lower wire harness fixing block 9.2. The wire harness cable ties 7 are fixed to the female end wire fixing plate 5.3. The section of the wire harness fixing block 9 and the female end wire fixing plate 5.3, which is fixed to the wire harness cable tie 7, are both located inside the protective cover 10.

[0042] Structural Form Two: such as Figure 1 —2 and Figure 6 As shown in Figure 7, the second fixing structure includes a wire harness fixing ring 11, which includes a wire harness fixing rod 11.1 arranged internally and externally, and a wire harness fixing ring 11.2 with a notch, coaxially sleeved on the wire harness fixing rod 11.1. Multiple semi-cylindrical grooves that mate with the wire harness 8 are spaced apart on the outer circumference of the wire harness fixing rod 11.1, and multiple semi-cylindrical grooves that mate with the wire harness 8 are opened on the inner circumference of the wire harness fixing ring 11.2. The wire harness fixing rod 11.1 and the wire harness fixing ring 11.2 are fixed together by wire harness cable ties 7. The wire harness 8 is fixed in the cylindrical groove formed by the semi-cylindrical grooves of the wire harness fixing rod 11.1 and the wire harness fixing ring 11.2. The wire harness cable ties 7 are fixed to the female end wire fixing plate 5.3. The wire harness fixing ring 11 and the plate section of the female end wire fixing plate 5.3 fixed with the wire harness cable ties 7 are both housed within the protective cover 10.

[0043] Similarly, the male wire 3 near the male connector assembly 1 in this invention can also be fixed to the male wire fixing plate 5.2 by the second fixing structure.

[0044] The second fixed structure also has two structural forms:

[0045] Structure Form 1: The second fixing structure includes a wire harness fixing block 9, which comprises an upper wire harness fixing block 9.1 and a lower wire harness fixing block 9.2 arranged vertically. The bottom surface of the upper wire harness fixing block 9.1 has multiple semi-cylindrical grooves that mate with the wire harness 8, and the top surface of the lower wire harness fixing block 9.2 has multiple semi-cylindrical grooves that mate with the wire harness 8. The upper wire harness fixing block 9.1 and the lower wire harness fixing block 9.2 are fixed together by wire harness cable ties 7. The wire harness 8 is fixed in the cylindrical groove formed by the semi-cylindrical grooves of the upper wire harness fixing block 9.1 and the lower wire harness fixing block 9.2. The wire harness cable ties 7 are fixed to the male end wire fixing plate 5.2. The wire harness fixing block 9 and the plate section of the male end wire fixing plate 5.2 fixed with the wire harness cable ties 7 are both housed within the protective cover 10.

[0046] Structure Form Two: The second fixing structure includes a wire harness fixing ring 11, which includes wire harness fixing rods 11.1 arranged internally and externally, and a wire harness fixing ring 11.2 with a notch, coaxially sleeved on the wire harness fixing rods 11.1. Multiple semi-cylindrical grooves that mate with the wire harness 8 are spaced apart on the outer circumference of the wire harness fixing rods 11.1, and multiple semi-cylindrical grooves that mate with the wire harness 8 are opened on the inner circumference of the wire harness fixing ring 11.2. The wire harness fixing rods 11.1 and the wire harness fixing ring 11.2 are fixed together by wire harness cable ties 7. The wire harness 8 is fixed within the cylindrical groove formed by the semi-cylindrical grooves of the wire harness fixing rods 11.1 and the wire harness fixing ring 11.2. The wire harness cable ties 7 are fixed to the male end wire fixing plate 5.2. Both the wire harness fixing ring 11 and the plate section of the male end wire fixing plate 5.2 fixed with the wire harness cable ties 7 are housed within the protective cover 10.

[0047] like Figure 9 As shown, the protective cover 10 includes two half-shells, left and right, which are fixed together at the top by connecting ribs 14. The bottom of the two half-shells is detachably fixed by buckles 17. The middle part forms a slot 15 for cooperating with wires and an opening 16 for cooperating with a fixing plate. Both the wires and the fixing plate can be set inside the protective cover 10.

[0048] Based on the above structure, a reasonable design can be made as follows: Figure 10 —11 shows a wire harness structure with the conductor bent at 90° and such Figure 1 —2 shows a wire harness structure with conductors arranged horizontally at 180°.

[0049] This invention designs the insertion points of the male and female connectors and the nearest wire harness fixing points on their left and right sides on the same fixing bracket. Since all three fixing points are located on the same bracket, synchronous vibration of the three fixing points is ensured, preventing loosening of the male and female connectors, reducing or avoiding the influence of external factors on the wire harness and connector, and ensuring the reliability of the connector insertion. The wire segment closest to the male and female connectors is located below the connectors, ensuring that water does not flow into the connector or accumulate at the connector tail (avoiding water ingress due to prolonged water accumulation). The wires can be fixed using wire harness fixing blocks 9, wire harness fixing rings 11, or wire harness cable ties 7. Various structures are available, allowing for different fixing structures to be selected according to different wire segments, ensuring optimal wire fixing effect and stability while also minimizing costs. To prevent water accumulation inside the corrugated pipe 6, when a water trap structure is included, this section of the wire harness should use an open corrugated pipe or have a drainage hole at the lowest point of the corrugated pipe 6, which improves the connector's waterproof rating to some extent.

[0050] like Figure 8 The diagram shows a typical fixing point. The cable tie 7 secures the corrugated tube 6 to the bracket. Although the three-point fixing structure greatly improves the signal transmission reliability between the wire harness 8 and the connector, the outer covering of the wire harness 8 is the corrugated tube 6 (a wear-resistant plastic material that effectively prevents foreign objects from entering the wire harness and prevents friction). The filling rate of the wire harness 8 inside the corrugated tube 6 is ≤85%, so there is a certain amount of movement of the wire harness 8 inside the corrugated tube 6. In other words, when the fixing point is set on the outside of the corrugated tube 6, the fixing point can effectively prevent the movement of the corrugated tube 6, but it cannot prevent the wire harness 8 from moving or shifting inside the corrugated tube 6. Especially when the wire harness 8 is taut, vibrating, or under tension, it is easy to damage the terminals and cause poor contact. Therefore, the fixing point structure needs to be redesigned and upgraded.

[0051] like Figure 3 — Figure 5 As shown, after removing the protective cover 10, the wire harness 8 emerges from the corrugated pipe 6 and is divided into upper and lower layers. The wire harness 8 is held in place by the wire harness fixing block 9, and then fixed to the central fixing bracket 5 by the wire harness cable ties 7. In this design structure, the material and size selection of the wire harness fixing block 9 should ensure that the frictional force exerted by the wire harness fixing block 9 on the wire harness 8 is greater than the tensile force that the corresponding connector terminal can withstand. This ensures the reliability of the wire harness terminal connection before the fixing point fails when external force is applied to the end of the wire harness 8. It should be noted that... Figure 1 — Figure 2 or Figure 10 — Figure 11All the fixing points shown can be upgraded to fixing points of wire harness fixing block 9. However, for cost considerations, it is generally sufficient to design the first fixing point at the tail of the male and female connectors as wire harness fixing block 9 to effectively ensure the reliability of the connector connection.

[0052] like Figure 5 As shown, the individual component of the wire harness fixing block 9 is divided into two parts: a housing 12 (made of wear-resistant hard plastic that is not easily deformed) and a filler 13 (made of wear-resistant soft plastic that has a certain degree of elasticity and friction). Similarly, the wire harness fixing ring 11.2 also includes a housing 12 (made of wear-resistant hard plastic that is not easily deformed) and a filler 13 (made of wear-resistant soft plastic that has a certain degree of elasticity and friction).

[0053] In this invention, the first fixing point at the connector tail is approximately 100mm away from the connector. Too close a distance can easily cause stress on the connector, while too far a distance cannot effectively secure the wiring harness. The spacing between other fixing points is designed to be between 100 and 400mm, depending on the actual situation. When the fixing point structure is upgraded, a protective cover 10 can be used to shield the fixing points, improving the appearance quality; the cover is easily removable. The fixing structure designed in this invention to improve the reliability of signal transmission in commercial vehicle chassis wiring harnesses is simple in principle, easy to implement, and easy to promote.

[0054] It should be noted that the above description of the technical solutions is exemplary, and this specification can be embodied in different forms and should not be construed as limiting it to the technical solutions described herein. Rather, providing these descriptions will make the disclosure of this invention thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Furthermore, the technical solutions of this invention are limited only by the scope of the claims. Finally, it should be pointed out that the above embodiments are merely representative examples of this invention. Obviously, this invention is not limited to the above embodiments and can have many variations. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this invention should be considered to fall within the protection scope of this invention. The invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments.

Claims

1. A fixed structure for improving the reliability of signal transmission in a commercial vehicle chassis wiring harness, comprising a male connector assembly (1) and a female connector assembly (2) that are plugged into each other, and a male wire (3) connected to the male connector assembly (1) and a female wire (4) connected to the female connector assembly (2), characterized in that: The insertion points of the male connector assembly (1) and the female connector assembly (2), the male wire (3) near one end of the male connector assembly (1), and the female wire (4) near one end of the female connector assembly (2) are all fixed to a central fixing bracket (5); the central fixing bracket (5) includes a central fixing plate (5.1), a male wire fixing plate (5.2) fixedly connected to the central fixing plate (5.1) and extending towards the male wire (3), and a female wire fixing plate (5.3) fixedly connected to the central fixing plate (5.1) and extending towards the female wire (4); the insertion points of the male connector assembly (1) and the female connector assembly (2) are fixed to the central fixing bracket (5.2). On the fixing plate (5.1), the male wire (3) near the male connector assembly (1) is fixed to the male wire fixing plate (5.2), and the female wire (4) near the female connector assembly (2) is fixed to the female wire fixing plate (5.3); the male wire (3) near the male connector assembly (1) is fixed to the male wire fixing plate (5.2) by a first fixing structure or a second fixing structure; the female wire (4) near the female connector assembly (2) is also fixed to the female wire fixing plate (5.3) by the first fixing structure or the second fixing structure; both the male wire (3) and the female wire (4) include multiple wire harnesses (8). The second fixing structure includes a wire harness fixing block (9), which includes an upper wire harness fixing block (9.1) and a lower wire harness fixing block (9.2) arranged vertically. The bottom surface of the upper wire harness fixing block (9.1) is provided with a plurality of semi-cylindrical grooves that cooperate with the wire harness (8). The top surface of the lower wire harness fixing block (9.2) is provided with a plurality of semi-cylindrical grooves that cooperate with the wire harness (8). The upper wire harness fixing block (9.1) and the lower wire harness fixing block (9.2) are fixed by wire harness cable ties (7). The wire harness (8) is fixed in the cylindrical groove formed by the semi-cylindrical groove of the upper wire harness fixing block (9.1) and the semi-cylindrical groove of the lower wire harness fixing block (9.2). The wire harness cable ties (7) are fixed on the male end wire fixing plate (5.2) or the female end wire fixing plate (5.3). Alternatively, the second fixing structure may include a wire harness fixing ring (11), which includes a wire harness fixing rod (11.1) arranged inside and outside, and a wire harness fixing ring (11.2) with a notch and coaxially sleeved on the wire harness fixing rod (11.1). The outer circumferential surface of the wire harness fixing rod (11.1) is provided with a plurality of semi-cylindrical grooves that mate with the wire harness (8). The inner circumferential surface of the wire harness fixing ring (11.2) is provided with a plurality of grooves that mate with the wire harness (8). 8) The semi-cylindrical grooves are matched. The wire harness fixing rod (11.1) and the wire harness fixing ring (11.2) are tied and fixed by the wire harness cable tie (7). The wire harness (8) is fixed in the cylindrical groove formed by the semi-cylindrical groove of the wire harness fixing rod (11.1) and the semi-cylindrical groove of the wire harness fixing ring (11.2). The wire harness cable tie (7) is fixed on the male end wire fixing plate (5.2) or the female end wire fixing plate (5.3).

2. The fixing structure for improving the reliability of signal transmission in the wiring harness of a commercial vehicle chassis as described in claim 1, characterized in that: The middle fixing plate (5.1) has a snap-fit ​​hole. The head end of the male connector assembly (1) passes through the snap-fit ​​hole and is inserted into the female connector assembly (2). The male connector assembly (1) is fixed in the snap-fit ​​hole.

3. The fixing structure for improving the reliability of signal transmission in the wiring harness of a commercial vehicle chassis as described in claim 1, characterized in that: Both the male end conductor (3) and the female end conductor (4) are disposed inside the corrugated pipe (6); the first fixing structure includes a wire harness cable tie (7) tied to the corrugated pipe (6), and the wire harness cable tie (7) is fixed to the male end conductor fixing plate (5.2) or the female end conductor fixing plate (5.3).

4. The fixing structure for improving the reliability of signal transmission in the wiring harness of a commercial vehicle chassis as described in claim 1, characterized in that: The wire harness fixing block (9), the section of the male end wire fixing plate (5.2) fixed to the wire harness cable tie (7), or the section of the female end wire fixing plate (5.3) fixed to the wire harness cable tie (7) are all disposed inside the protective cover (10).

5. The fixing structure for improving the reliability of signal transmission in the wiring harness of a commercial vehicle chassis as described in claim 1, characterized in that: The wire harness fixing ring (11), the section of the male end wire fixing plate (5.2) fixed to the wire harness cable tie (7), or the section of the female end wire fixing plate (5.3) fixed to the wire harness cable tie (7) are all disposed inside the protective cover (10).

6. The fixing structure for improving the reliability of signal transmission in the wiring harness of a commercial vehicle chassis as described in claim 1, characterized in that: The male wire (3) near one end of the male connector assembly (1) is arranged at a height below the male connector assembly (1), and the female wire (4) near one end of the female connector assembly (2) is arranged at a height below the female connector assembly (2).

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