Automobile wire harness

Abstract

The application discloses a kind of automobile wire harness, including wire harness group, double-layered outer cover part and equidistant binding element;Wire harness group connects vehicle body main wire harness interface and vehicle door execution unit, outer cover part contains foam buffer layer and fabric fixed layer and is adhesively fixed;Binding element can contract so that outer cover part forms binding part and binds wire harness, while binding wire harness hole fixing band wire harness sleeve.The application replaces traditional adhesive tape winding or bellows, eliminates wire harness vibration abnormal sound from the root, wire harness integrity is good, without secondary processing on site, installation is convenient, binding element can be adapted to different vehicle door fixed holes, meet the customized needs of automobile manufacturers.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of wiring harness, and particularly relates to an automobile wiring harness. BACKGROUND

[0002] The automobile wiring harness is a key transmission component for connecting the control unit and the execution unit in the automobile electronic system, which is usually composed of a plurality of cables that bear the signal or power transmission function, and terminals are arranged at both ends of the cable to realize electrical connection through the interface adaptation of the terminals and the control unit and the execution unit. In the actual production process, the automobile wiring harness manufacturer needs to arrange and protect the cable according to the customization requirements of the automobile manufacturer to form a finished product wiring harness; in the prior art, the protection and fixation of the finished product wiring harness are usually achieved by two methods, one of which is to wrap the engineering adhesive tape along the length direction of the wiring harness to realize the bundling and fixation of the cable by the adhesion of the adhesive tape, and to provide basic insulation protection; the other is to set a corrugated pipe outside the wiring harness, and the corrugated pipe forms a wrapping protection for the cable through its own structural strength, and then cooperates with additional fixing members such as buckles and straps to fix the wiring harness on the pre-set mounting point of the vehicle body. In the actual application, both of the above-mentioned methods need to realize the connection between the wiring harness and the vehicle body through the fixing members (such as buckles and straps) arranged in sections to meet the installation requirements of different areas.

[0003] However, the protection and fixation method of the existing automobile wiring harness has obvious deficiencies. On the one hand, the integrity of the wiring harness is poor, the adhesive tape is wrapped in sections, and gaps are easily formed between the wrapped sections, resulting in local loosening of the cable; although the corrugated pipe is an integral structure, it needs to be cut off to adapt to the branch requirements, and the cut-off part needs to be additionally sealed by adhesive tape or equipped with a joint, which further damages the integrity of the wiring harness. On the other hand, whether it is adhesive tape wrapping or corrugated pipe wrapping, the wiring harness will form a bundle with a certain rigidity, which is easy to collide or rub with the vehicle body sheet metal parts during the driving process of the vehicle due to the influence of road bumps and vehicle body vibration, and then abnormal noise is generated; since the wiring harness is widely arranged and the abnormal noise is randomly generated, and the abnormal noise source is difficult to be directly located through visual or conventional detection means, it brings great difficulty to the troubleshooting and solution of the abnormal noise problem. In addition, in the existing method, the fixation of the branch depends on the additional adhesive tape wrapping or small clamps, which is complicated and has poor fixation stability, and the branch part is easy to loosen due to vibration, which further aggravates the abnormal noise risk. SUMMARY

[0004] In order to solve the problems existing in the prior art, the present application provides an automobile wiring harness, which can realize the reduction of abnormal noise, ensure the integrity of the wiring harness, and provide the bundling effect of the branch hole through the several bundling members arranged.

[0005] The technical scheme adopted by the present application is as follows:

[0006] In a first aspect, the present application provides a kind of automobile wire harness, for connecting automobile control unit and execution unit, including the wire harness group of a plurality of cable compositions and the outer sleeve of the wire harness group along the length direction, the cable both sides have the terminal of connecting control unit or execution unit;

[0007] The outer sleeve includes a buffer layer and a fixed layer inside the buffer layer, and also includes a binding member arranged at equal intervals along the length direction of the outer sleeve, and the cross-sectional size of the part of the outer sleeve is reduced to form a ring-shaped binding part for bundling the inner wire harness group by operating the binding member after the outer sleeve is sleeved outside the wire harness group.

[0008] In combination with the first aspect, the present application provides a first embodiment of the first aspect, and the binding member has a protrusion and a clip for inserting into an opening on the automobile for fixing the wire harness.

[0009] In combination with the first aspect, the present application provides a second embodiment of the first aspect, and the binding member has a connecting part for connecting a plurality of clips of different specifications for inserting into an opening on the automobile for fixing the wire harness.

[0010] In combination with the first aspect, the present application provides a third embodiment of the first aspect, and a plurality of wire distribution holes are provided on the outer sleeve at equal intervals corresponding to each binding member for the inner cable to pass through, and the cable passing through the wire distribution hole is bundled to form a wire distribution harness by the binding member reducing the outer sleeve to form the binding part and simultaneously tightening the wire distribution hole.

[0011] In combination with the third embodiment of the first aspect, the present application provides a fourth embodiment of the first aspect, and a wire distribution sleeve is sleeved on the wire distribution harness, and the wire distribution sleeve is pressed and connected by the binding member after being inserted into the wire distribution hole.

[0012] In combination with the third or fourth embodiment of the first aspect, the present application provides a fifth embodiment of the first aspect, and the binding member is a strip-shaped pull rope, the pull rope is sleeved outside the fixed layer, one end of the pull rope is fixed on the fixed layer, the other end of the pull rope extends outward from the wire distribution hole after winding around the fixed layer and forms a pulling end for easy pulling, the fixed layer is annularly reduced to form a binding part with a plurality of wrinkles by pulling the pulling end outward, the wire distribution hole in the binding part is bent and closed to press the wire distribution harness, and the pulling end of the pull rope is fixed outside the outer sleeve after being tightened.

[0013] In combination with the third or fourth embodiment of the first aspect, the present application provides a sixth embodiment of the first aspect, and the binding member is a strip-shaped pull rope, a plurality of rope sleeves are provided on the inner circumferential wall of any circular cross-section of the fixed layer, one end of the pull rope is fixed on the inner circumferential wall of the fixed layer, and the other end of the pull rope passes through the plurality of rope sleeves in sequence and then passes out from the inner circumferential wall of the fixed layer close to the wire distribution hole, and the adjacent rope sleeves are close to each other and form a wrinkle between them by tightening the pulled-out pull rope from the outside;

[0014] The pull rope has an enlarged end, and the outwardly pulled pull rope abuts against the inner circumferential wall of the fixing layer at the enlarged end to drive the wire distribution hole to close and compress the wire distribution bundle.

[0015] In combination with the third or fourth implementation of the first aspect, the application provides a seventh implementation of the first aspect, the restraint member is a strip-shaped pull rope, and a plurality of rope sleeves are arranged on the inner circumferential wall of any circular cross section of the fixing layer, and the pull rope passes through all the rope sleeves;

[0016] A group of rope passing holes are arranged on both sides of the wire distribution hole, both ends of the pull rope pass out of the fixing layer from the rope passing holes on the corresponding side, and an enlarged end is arranged on the pull rope near each end;

[0017] Outwardly pulling both ends of the pull rope causes the rope sleeves to close and compress the wire bundle group inside the fixing layer, and after the wire bundle group is compressed, the pull rope is continuously pulled to cause both enlarged ends to abut against the inner circumferential wall of the fixing layer from inside the rope passing hole, and both ends of the pull rope outside the fixing layer buckle to close and compress the wire distribution hole on both sides to compress the wire distribution bundle.

[0018] In combination with the third or fourth implementation of the first aspect, the application provides an eighth implementation of the first aspect, the fixing layer is provided with concave-shaped cutouts at equal intervals along the length direction, the restraint member in the form of a strip and the wire distribution hole in the form of a strip are formed by the concave-shaped cutouts and integrally connected to the fixing layer;

[0019] The inner side of the end of the restraint member in the form of a strip is provided with a magic tape, the outer surface of the fixing layer on one side of the concave-shaped cutout is provided with a corresponding felt area, the concave-shaped cutout side of the fixing layer is caused to form a wrinkle and compress the wire bundle group inside the fixing layer by outwardly pulling the restraint member in the form of a strip, the wire distribution hole is closed and compressed by the restraint member in the form of a strip at the same time, the magic tape of the restraint member in the form of a strip is contacted and fixed with the felt area to keep the compressed state.

[0020] In combination with the third or fourth implementation of the first aspect, the application provides a ninth implementation of the first aspect, the fixing layer is provided with a group of concave-shaped cutouts arranged opposite to each other at equal intervals along the length direction, the wire distribution hole is arranged between the concave-shaped cutouts in the same group, the restraint member in the form of a strip is formed by the concave-shaped cutouts and integrally connected to the fixing layer, the wire bundle group inside the fixing layer is restrained by simultaneously pulling the two restraint members in the form of a strip in the same group in opposite directions to form a restraint part, and the wire distribution hole in the middle is closed and compressed at the same time.

[0021] The application has the following beneficial effects:

[0022] (1) The double-layer sheath part is adopted instead of the existing adhesive tape winding or single corrugated pipe structure, the fixing layer can realize overall wrapping of the cable, the buffer layer can absorb the impact force generated by vehicle vibration through the elastic property of the buffer layer, direct collision or friction of the wire harness with the vehicle body sheet metal part is avoided, and the possibility of abnormal sound generation is eliminated from the root, and subsequent positioning and checking of the abnormal sound source are not required;

[0023] (2) The sheath part is reduced in size by the binding part, the binding part can realize annular binding and fixing of the internal wire harness group, and can simultaneously collect the branch hole; in cooperation with the use of the branch sleeve, the branch wire passing through the branch hole is tightly connected with the sheath part, additional fixing by adhesive tape or clamp is not required, the processing flow of the branch part is simplified, the fixing stability of the branch wire is improved, and abnormal sound generated by loosening of the branch part is avoided;

[0024] (3) The binding part is provided with a connecting part matched with different specifications of the clamp, so that the binding part has the wire harness fixing function, additional fixing parts such as buckles and straps are not required, the number of parts of the wire harness is reduced, and the installation flow of the wire harness is simplified; and the operation mode (such as rope pulling and magic tape fixing) of the binding part is simple, and the binding and branch processing of the wire harness can be quickly completed in the production process, and the production efficiency is improved;

[0025] (4) The structure and optimization of the rope are convenient to operate, and the branch hole can be locked by the bidirectional cross mode, and the other mode of the band-shaped binding part formed on the fixing layer by the notch can form a foldable area on the fixing layer, the band-shaped binding part is pulled to form a fold around the concave notch, and the concave notch can form a branch hole for the branch wire to pass through after the band-shaped binding part is pulled open, the formed branch hole can be pulled and bound after the band-shaped binding part is bound, and the concave notch can form the structure of the binding part by laser cutting or other modes on the fixing layer, the cost is low, and the operation is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a part of the automobile wire harness in the embodiment of the application.

[0027] Figure 2 is a part of the automobile wire harness in the embodiment of the application.

[0028] Figure 3 is a part of the automobile wire harness in the embodiment of the application. Figure 2

[0029] Figure 4 is a part of the automobile wire harness in the embodiment of the application.​

[0030] Figure 5 is a partial enlarged schematic view of B in the present application Figure 4

[0031] Figure 6 is an axonometric view of the present application embodiment using a single cutting belt as a binding member

[0032] Figure 7 is a plan view of the present application embodiment using two cutting belts as a binding member

[0033] Figure 8 is an axonometric view of the present application embodiment using two cutting belts as a binding member

[0034] Figure 9 is a schematic view of the first tightening mode of the present application embodiment using a pull rope as a binding member

[0035] Figure 10 is a schematic view of the second tightening mode of the present application embodiment using a pull rope as a binding member

[0036] Figure 11 is a schematic view of the first tightening mode of the present application embodiment using a pull rope as a binding member after tightening

[0037] In the figure: 1-buffer layer, 2-fixed layer, 3-wire bundle group, 4-binding member, 5-rope sleeve, 6-wire distribution hole, 7-concave-shaped cutout DETAILED DESCRIPTION

[0038] The present application will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be clearly and completely described below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0041] ​It should be noted that similar reference numerals and letters refer to like items throughout the accompanying drawings, and once an item is defined in one drawing, it is not necessary to further define and explain it in subsequent drawings.

[0042] In the description of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the application is used, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, if the terms "first", "second" and the like appear in the description of the present application, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0043] In addition, if the terms "horizontal", "vertical" and the like appear in the description of the present application, they do not mean that the component must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0044] In the description of the present application, it should also be noted that unless otherwise explicitly specified and limited, if the terms "arrangement", "installation", "connection", "connection" appear, they should be understood in a broad sense, for example, they can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. Embodiment

[0045] The embodiment discloses an integrated buffering and noise reduction wire harness applied to a car door, aiming at solving the problems that the existing car door wire harness relies on tape winding or segmented protection of corrugated pipes to cause poor integrity, easy collision with the vehicle body sheet metal during vehicle driving to produce abnormal noise and difficulty in locating the abnormal noise source.

[0046] Existing automotive door wiring harnesses typically consist of multiple cables that transmit signals and electrical power. During production, they are often bundled and secured by wrapping engineering tape along the length of the harness or by using corrugated tubing and additional clips to fix them to pre-set points on the vehicle body. These methods not only require segmented processing of the branching points, which is cumbersome and compromises the integrity of the wiring harness, but also create a certain rigidity in the harness. When the vehicle is bumpy, the harness is prone to friction and collision with the door sheet metal, generating abnormal noises. Furthermore, the source of these noises is difficult to pinpoint due to the wide distribution of the wiring harness and the randomness of its vibrations. In addition, the insufficient stability of the branching points further exacerbates the risk of abnormal noises.

[0047] This application addresses the aforementioned issues by providing an integrated prefabricated wiring harness that can be directly adapted for vehicle door installation. It eliminates the need for on-site secondary processing and simultaneously provides wiring harness protection, fixation, and noise reduction functions, thus meeting the customized needs of automobile manufacturers for vehicle door wiring harnesses.

[0048] Specifically, the integrated buffer noise reduction harness includes:

[0049] Reference Figure 1 and Figure 2 The wire harness assembly 3, the double-layered outer jacket, and the binding members 4 evenly spaced along the length of the outer jacket are used to bind the inner wire harness assembly 3 by reducing the cross-sectional size of the portion of the outer jacket after the outer jacket is fitted over it. Only a portion of the outer jacket and wire harness assembly 3 are shown in the figure; the outer jacket only partially has a buffer layer 1 and partly is an exposed fixing layer 2, used for structural illustration. The end face is used to illustrate the structure forming the binding member. In the actual complete wire harness, the entire wire harness has several pre-bound binding members, and the wire harness assembly 3 also has several branch wires fitted with an outer jacket to prevent abnormal noise from impacting the sheet metal.

[0050] It should be noted that the wiring harness group 3 is composed of several cables. Some of these cables are responsible for transmitting power to the window regulator, door lock motor, and exterior rearview mirror adjustment motor, while others are responsible for transmitting signals between the body control unit and each actuator.

[0051] One end of the cable integrates a standardized terminal for precise connection with the main body wiring harness interface. The main body wiring harness interface acts as a relay node, stably transmitting the electrical energy output from the vehicle's power system and the control signals from the body control unit to the door wiring harness. The other end of the cable branches into multiple independent cable branches, each with a dedicated terminal adapted to the corresponding actuator. These terminals connect to the door and window lift control module, door lock motor, exterior rearview mirror adjustment motor, and function button interfaces on the door interior panel, ensuring the stable operation of each door's functions.

[0052] Furthermore, the outer jacket is composed of a buffer layer 1 and a fixing layer 2. The buffer layer 1 is made of EPDM closed-cell foam material with a density controlled at 40-60 kg / m³ and a thickness of 3-5 mm. It has both elastic buffering performance, which can effectively absorb the vibration energy generated by road bumps during vehicle operation and prevent direct friction or collision between the wiring harness body and the door sheet metal parts, and weather resistance, maintaining structural and performance stability in a temperature range of -40℃ to 150℃.

[0053] The fixing layer 2 is made of PET plain weave fabric with a thickness of 0.15-0.2mm. Its tensile strength is not less than 200N / 5cm, and it has excellent tear resistance. It can form a tight wrap around the internal wire harness group 3. At the same time, the material has good bending performance, and the minimum bending radius can be controlled below 10mm. It can flexibly adapt to the curved installation path such as the door hinge, the connection position between the A-pillar and the door, and will not be damaged or broken due to frequent bending.

[0054] The buffer layer 1 and the fixing layer 2 are firmly connected by solvent-based PU adhesive. During the connection process, adhesive dots with a diameter of 1mm are evenly distributed on the inner surface of the buffer layer 1 at a density of 3-5 dots per square centimeter. Then, the corresponding surfaces of the fixing layer 2 and the buffer layer 1 are precisely aligned and bonded together. Subsequently, the layers are pressed together using a heated roller press. The pressing temperature is controlled at 80-100℃ and the pressing pressure is set at 0.3-0.5MPa to ensure that the peel strength between the buffer layer 1 and the fixing layer 2 is not less than 3N / 25mm. This ensures that no delamination will occur during long-term use and repeated bending, thus guaranteeing the overall protective effect of the outer layer.

[0055] Furthermore, the binding member 4 is preferably defined as follows: as one embodiment of the binding member 4, that is, an independent strap with a clip, the binding member 4 is made of nylon material, the strap width is 8-10mm, the thickness is 1-1.2mm, and its surface is provided with a uniformly distributed anti-slip tooth structure, which can achieve self-locking after tightening to prevent loosening.

[0056] Several sets of through holes are made at equal intervals along the length of the outer cover to connect the buffer layer 1 and the fixing layer 2. Each set of through holes includes two circular holes symmetrically distributed on both sides of the outer cover. The diameter of the through holes is set to 10-12mm, slightly larger than the width of the strapping, to ensure that the strapping can be smoothly inserted.

[0057] In use, on the production line, workers manually pass the strapping tape through a set of through holes from the outside of the outer casing, wrap it around the circumference of the outer casing once, and then pull the free end of the strapping tape outwards. This gradually reduces the cross-sectional size of the corresponding position on the outer casing, forming a ring-shaped binding part that tightly binds and secures the internal wire harness group 3. The strapping tape has an integrally formed clip in the middle for fixing to the car door. The shape and size of the clip are designed according to the specifications of the pre-set fixing holes on the car door sheet metal. After the wire harness is bundled in place, a complete wire harness product is supplied to the car manufacturer. The car manufacturer can then directly insert the clip into the fixing holes on the car door on the production line to complete the fixing installation of the wire harness to the car door, eliminating the need for additional fixing components, greatly simplifying the installation process and improving installation efficiency.

[0058] As another implementation, the restraint member 4 is a pre-embedded structure. The restraint member 4 is a pre-embedded part made of elastic plastic material. Its main body is ring-shaped and sleeved on the outside of the fixing layer 2. The outer surface of the fixing layer 2 is provided with an annular groove corresponding to the position of the pre-embedded part. The pre-embedded part is connected to the fixing layer 2 through the annular groove, so that the pre-embedded part can rotate flexibly along the circumference of the fixing layer 2 to adapt to the angle requirements of different installation positions of the car door and avoid fixing difficulties due to installation angle deviation.

[0059] One side of the embedded part extends into a long strip-shaped operating end. The operating end penetrates the buffer layer 1 radially along the outer sleeve and extends to the outside of the outer sleeve. The free end of the operating end is provided with a split clip. The clip and the operating end are detachably connected by a snap-fit ​​structure. The operator can replace the clip with a different size according to the actual specifications of the door fixing hole to improve the adaptability of the wiring harness to different car door models.

[0060] When performing the wire harness fixing operation, pull the operating end of the embedded part outward, causing the annular body of the embedded part to contract towards the center, reducing the cross-sectional size of the corresponding area of ​​the outer sleeve, forming a binding part to bundle and fix the internal wire harness group 3; after tightening to the preset degree and ensuring that the wire harness group 3 is not loose, insert the clip at the free end of the operating end into the fixing hole of the door sheet metal to complete the installation and fixing of the wire harness to the door. The entire operation process does not require the assistance of tools, is convenient and efficient, and is suitable for rapid assembly after mass production.

[0061] Furthermore, the specific implementation of the rope-type restraint 4 is as follows:

[0062] The restraint component 4 uses a high-strength nylon pull rope with a diameter of 1-1.5mm. The pull rope sleeve 5 is located on the outside of the fixing layer 2. One end of the pull rope is fixed to the outer surface of the fixing layer 2 by a heat pressing process. The fixing point is selected in the area between two adjacent branch holes 6 to avoid affecting the branching operation. The other end of the pull rope starts from the fixing point, wraps around the circumference of the fixing layer 2, and extends outward from the corresponding branch hole 6 to form a pull end that is easy for the operator to pull.

[0063] When performing the branching and bundling operations, first pass the branch of the cable to be led out through the branching hole 6, and then pull the pulling end of the pull rope outward. The pull rope gradually tightens and causes the fixing layer 2 to contract in the circumferential direction, so that several evenly distributed folds are formed on the surface of the fixing layer 2, thereby forming an annular binding part, which tightly binds the internal wire bundle group 3. At the same time, the branching hole 6 gradually closes as the folds of the fixing layer 2 bend, pressing and fixing the branched wire bundle that passes through the branching hole 6 to prevent the branched wire bundle from loosening. After the pull rope is tightened to the preset degree, the pulling end of the pull rope is fixed to the outside of the outer jacket by special plastic buckles or adhesive tape, maintaining the bundled state of the binding part.

[0064] To further enhance the protection and fixation of the wire harness, a wire harness sleeve is fitted on the outside of the wire harness that passes through the wire harness hole 6. The wire harness sleeve adopts the same double-layer structure as the outer layer, namely, the outer layer is an EPDM closed-cell foam buffer layer 1 and the inner layer is a PET plain weave fabric fixing layer 2. One end of the wire harness sleeve is inserted into the wire harness hole 6. During the process of closing the wire harness hole 6, the wire harness sleeve and the fixing layer 2 fit tightly together, which not only achieves a firm fixation of the wire harness, but also provides effective protection for the wire harness.

[0065] Another implementation of the drawstring restraint 4 is a built-in drawstring loop 5 structure. The restraint 4 is still a high-strength nylon drawstring. On the inner peripheral wall of any circular cross-section of the fixing layer 2, 4-6 drawstring loops 5 are fixedly installed at equal intervals along the circumference. The drawstring loops 5 are made of the same PET plain weave fabric material as the fixing layer 2. They are connected and fixed to the inner peripheral wall of the fixing layer 2 by sewing. The sewing stitch density is controlled at 10-12 stitches / cm to ensure the connection strength between the drawstring loops 5 and the fixing layer 2 and to prevent the drawstring loops 5 from falling off during tightening. Alternatively, drawstring holes can be directly opened on the fixing layer 2, and the drawstring passes through two adjacent drawstring holes from the inner peripheral wall to form a raised drawstring loop 5 structure, which can also achieve the corresponding technical effect.

[0066] One end of the pull rope is fixed to the inner circumferential wall of the fixing layer 2 by a knot. The other end of the pull rope starts from the fixed end, passes through all the rope loops 5 in sequence, and then comes out from the inner circumferential wall of the fixing layer 2 near the branch hole 6 to the outer side of the outer jacket. An enlarged end is integrally formed on the pull rope near the end that comes out. The diameter of the enlarged end is set to 3-4mm, which is larger than the diameter of the hole where the pull rope comes out. This can prevent the pull rope from being completely pulled into the interior of the fixing layer 2 during the tightening process, and play a limiting role.

[0067] During the tightening operation, pull the protruding end of the pull rope outward. The pull rope causes the various rope loops 5 to move closer together along the inner circumferential wall of the fixing layer 2, causing the fixing layer 2 to contract circumferentially, forming a binding part that secures the internal wire harness group 3. Continue pulling the pull rope, and the expanded end gradually presses against the inner circumferential wall of the fixing layer 2. At this time, the wire branching hole 6 closes towards the center under the contraction of the fixing layer 2, pressing the branch wires passing through the wire branching hole 6 tightly. Finally, the protruding end of the pull rope is fixed by knotting, maintaining the tight state of the binding part and the wire branching hole 6, ensuring that neither the wire harness group 3 nor the branch wires are loose. In this tightening method, it is necessary to manually press one end of the already fixed pull rope and then pull the other end to cause the rope loops 5 to contract and tighten, forming several folds, thereby achieving a circular binding effect.

[0068] Meanwhile, in this method, the outer buffer layer 1 also adopts a hollow setting with equal cross-section spacing, that is, a hollow area is set at the gap between two adjacent rope loops 5, so that when the rope loop 5 is tightened to form a binding part, the outer buffer layer 1 can also be bent and squeezed at the corresponding position to reduce the amount of material used, and at the same time play a conformal effect.

[0069] As another implementation, the rope-type restraint 4 is a two-way pulling structure, as shown in the reference. Figures 3-5 , Figures 9-11 The restraint 4 is a high-strength nylon rope. The inner wall of the fixing layer 2 is provided with 4-6 rope loops 5 at equal intervals along the circumference. The rope passes through all the rope loops 5 in sequence to form a ring structure around the inner wall of the fixing layer 2, ensuring that the fixing layer 2 can be evenly contracted when the rope is tightened.

[0070] At the two sides of the dividing hole 6, a set of rope holes are opened to pass through the fixing layer 2 and the buffer layer 1. The diameter of the rope hole is slightly larger than the diameter of the pull rope. The two ends of the pull rope pass through the rope holes on both sides of the dividing hole 6 to the outside of the outer jacket. An enlarged end is provided near each end of the pull rope. The diameter of the enlarged end is larger than the diameter of the rope hole to prevent the pull rope from being completely pulled into the fixing layer 2.

[0071] During the tightening operation, the operator holds both ends of the pull rope with both hands and applies outward pull force simultaneously. The pull rope causes each rope loop 5 to move closer together along the inner circumferential wall of the fixing layer 2, causing the fixing layer 2 to contract in the circumferential direction, forming a binding part that tightly binds the internal wire harness group 3. As the pull force continues to be applied, the two bulging ends abut against the inner circumferential wall of the fixing layer 2 from the inside of the rope hole. The branch hole 6 gradually closes under the pull force of the contraction of the fixing layer 2, pressing the branch wire harness that passes through the branch hole 6 tightly. After the branch wire harness and the wire harness group 3 are firmly fixed, the two ends of the pull rope are fastened and secured on the outside of the fixing layer 2 to ensure that the binding part and the branch hole 6 remain in a tight state, preventing the pull rope from loosening due to vibration during vehicle operation.

[0072] Furthermore, referring to Figure 6 An implementation method is adopted in which the dividing hole 6 and the binding member 4 are integrated.

[0073] Among them, the fixing layer 2 is made of nylon 66 twill fabric, which has a tensile strength of not less than 250N / 5cm and abrasion resistance better than PET plain weave fabric, and can better cope with repeated operation and long-term wear of the parting line.

[0074] The fixed layer 2 is made with U-shaped cuts 7 at equal intervals along its length using laser cutting technology, and the two long sides are more than twice the length of the short side.

[0075] The opening of the long side cut is perpendicular to the length direction of the wire harness. The cut forms three sides of a rectangle, with one side remaining connected to the fixing layer 2. This creates a strip-shaped restraint 4 that is integrally connected to the fixing layer 2 and can rotate freely. At the same time, the U-shaped cut 7 itself is a wire splitting hole 6 for the wire harness to pass through, eliminating the need for an additional independent wire splitting hole 6 and simplifying the outer casing structure.

[0076] A hook and loop fastener is fixed to the inner side of the end of the band-shaped fastener 4 by sewing. On the outer surface of the fixing layer 2 on one side of the U-shaped cutout 7, a hook and loop felt area is sewn to the position of the hook and loop fastener. The area of ​​the felt area is set to 2-3 cm² to ensure that the hook and loop fastener can provide sufficient adhesive force after they are attached to the felt area to avoid loosening.

[0077] During operation, first, the branch wire bundle that needs to be led out is passed through the U-shaped cut 7, and then the strip-shaped binding member 4 is pulled outward to one side, causing the edge of the fixing layer 2 corresponding to the cut position to shrink towards the center, so that the surface of the fixing layer 2 forms wrinkles at the U-shaped cut 7, thereby forming a binding part to tie and fix the internal wire bundle group 3.

[0078] Simultaneously, during the pulling process, the strip-shaped restraint 4 causes the two sides of the concave cut 7 to come together, tightly pressing the protruding branch wire bundle. After tightening until the branch wire bundle and wire bundle group 3 are no longer loose, the Velcro hook at the end of the strip-shaped restraint 4 is pressed against the felt area on the outer surface of the fixing layer 2 to fix the restraint 4, continuously maintaining the tightened state of the branch hole 6 and ensuring the stability of the branch wire bundle. It should be noted that in actual operation, since the cable passes through the branch hole 6, it is not always in contact with the strip-shaped restraint 4. Instead, the strip-shaped restraint 4 can be pulled around from one side, which can both form a restraint part and tighten the branch hole 6.

[0079] One implementation method involves forming a symmetrical concave cutout 7 structure, as shown in the reference. Figure 7 and Figure 8Circular branch holes 6 are made at equal intervals along the length of the fixed layer 2. The diameter of the branch holes 6 is set to 3-5mm according to the actual thickness of the branch wire bundle to ensure that the branch wire bundle can pass through smoothly without creating excessive gaps.

[0080] On both sides of each dividing hole 6, a set of U-shaped cuts 7 with opposite openings are made. The two U-shaped cuts 7 are symmetrically distributed with the dividing hole 6 as the center and are integrally formed with the fixing layer 2 by laser cutting process. Each U-shaped cut 7 forms a strip-shaped restraint 4 that can be flipped in the direction of the inside and outside of the fixing layer 2. The length and width of the two strip-shaped restraints 4 are designed according to the size of the fixing layer 2 to ensure that the fixing layer 2 can be effectively driven to shrink.

[0081] During operation, first, the wire harness is passed through the circular wire distribution hole 6, and a wire distribution sleeve with the same structure as the outer sleeve is fitted on the outside of the wire harness. Then, the strip-shaped restraint pieces 4 on both sides of the wire distribution hole 6 are pulled in opposite directions. The two restraint pieces 4 pull each other and cause the corresponding area of ​​the fixing layer 2 to shrink towards the center, forming a ring-shaped restraint part that tightly binds the internal wire harness group 3. At the same time, the wire distribution hole 6 gradually closes under the pulling force of the restraint pieces 4 on both sides, pressing and fixing the wire distribution sleeve and the wire harness, preventing the wire harness from loosening due to vibration during vehicle operation, and further improving the stability and protection effect of the wire distribution part.

[0082] It should be noted that the buffer layer 1 itself has good extrusion deformation characteristics, so it can also have a certain buffering effect when the binding part is formed, but it does not affect the local binding of the fixing layer 2. In actual operation, a hollow area of ​​the buffer layer 1 will be set at the position where the dividing hole 6 or the operating end of the binding part 4 is provided, so as to facilitate operation.

[0083] This invention is not limited to the optional embodiments described above, and anyone can derive other various forms of products based on the inspiration of this invention. The specific embodiments described above should not be construed as limiting the scope of protection of this invention; the scope of protection of this invention should be determined by the claims, and the specification can be used to interpret the claims.

Claims

1. An automotive wiring harness for connecting an automotive control unit and an actuator, characterized in that: The cable harness (3) consists of several cables and an outer sleeve is fitted on the cable harness (3) along its length. The cables have terminals on both sides for connecting to a control unit or an execution unit. The outer cover includes a buffer layer (1) and a fixing layer (2) inside the buffer layer (1), and also includes binding members (4) that are equally spaced along the length of the outer cover. After the outer cover is fitted over the wire harness group (3), the binding members (4) are operated to reduce the cross-sectional size of the part of the outer cover to form a ring-shaped binding part for binding the inner wire harness group (3). The outer sleeve has several branch holes (6) at equal intervals corresponding to each binding member (4) for the internal cables to pass through. The binding member (4) shrinks the outer sleeve to form a binding part and tightens the branch holes (6) to bind the cables passing through the branch holes (6) to form a branch bundle. The restraint (4) is a strip-shaped pull rope, and several rope loops (5) are provided on the inner peripheral wall of any circular cross section of the fixing layer (2), and the pull rope passes through all the rope loops (5). A set of rope holes is provided on both sides of the dividing hole (6), and the two ends of the pull rope pass through the fixing layer (2) from the rope hole on the corresponding side. An enlarged end is provided near each end of the pull rope. Pulling the two ends of the pull rope outwards at the same time causes the rope loop (5) to come together and tighten the wire bundle (3) inside the fixed layer (2). After the wire bundle (3) is tightened, the pull rope is pulled again, causing the two swollen ends to come from the inside of the rope hole to abut against the inner wall of the fixed layer (2). Outside the fixed layer (2), the two ends of the pull rope are fastened to close and tighten the two sides of the wire branch hole (6). Alternatively, the fixed layer (2) may have U-shaped cuts (7) spaced at equal intervals along its length, forming a strip-shaped binding member (4) and a strip-shaped dividing hole (6) integrally rotatably connected to the fixed layer (2) through the U-shaped cuts (7). The inner side of the end of the strip-shaped restraint (4) has Velcro. The outer surface of the fixing layer (2) on the side of the U-shaped cut (7) has a corresponding felt area. By pulling the strip-shaped restraint (4) outward, the U-shaped cut (7) side of the fixing layer (2) forms folds to tighten the wire bundle group (3) in the fixing layer (2). At the same time, the strip-shaped restraint (4) pulls the wire splitting hole (6) to close and tighten the wire bundle, and the Velcro of the strip-shaped restraint (4) contacts the felt area to fix and maintain the tightened state.

2. The automotive wiring harness according to claim 1, characterized in that: The wire harness is fitted with a wire sleeve, which is inserted into the wire hole (6) and bound and pressed by the binding member (4).

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