Wire harness abrasion protection sleeve

Abstract

The utility model relates to the technical field of wire harness protective sleeve, especially wire harness anti-abrasion protective sleeve, including flexible bending outer tube, the inside of flexible bending outer tube is used for storing and keeping up many wire harness, the both ends of each wire harness all stretch to the outside of flexible bending outer tube, the centre of flexible bending outer tube is inserted with centre support piece, the both ends of centre support piece all move and pass to the outside of flexible bending outer tube, the inside side wall of centre support piece is used for realizing the constraint spacing of each wire harness outside side wall respectively, the utility model discloses the combination structure of setting up flexible bending outer tube, centre support piece and end portion guide disc, can carry out the centralized protection constraint to many wire harness simultaneously, and can realize the constraint direction of wire harness different bending degree through the adjustment bending angle of flexible bending outer tube, adapts to different installation laying working condition.

Description

Technical Field

[0001] This utility model relates to the field of wire harness protective sleeve technology, and in particular to wire harness anti-wear protective sleeve. Background Technology

[0002] Wire harnesses are widely used in various electrical and electronic devices. Their main function is to build bridges between different circuits, enabling current flow and ensuring the normal operation of electronic components. To ensure the normal operation of wire harnesses and extend their service life, protecting them is crucial, and wire harness protective sleeves are one commonly used protective device.

[0003] Traditional wire harness protection methods often involve wrapping multiple wire harnesses together with a single sleeve. While this method can provide some protection for the wire harness, it has many shortcomings.

[0004] For example, patent document CN202420651360.7 discloses an electronic wire harness protective sleeve, whose main structure includes a protective sleeve body, a pressure-resistant layer, a fire-resistant layer, a connecting rod, an insulating tube, a central rod, and a limiting mechanism. The pressure-resistant layer is sleeved on the inner wall of the protective sleeve body, and the fire-resistant layer is connected to the inner wall of the pressure-resistant layer. The inner wall of the fire-resistant layer is connected to one side of the outer wall of the insulating tube through the connecting rod, and the other side of the outer wall of the insulating tube is connected to the outer wall of the central rod through the connecting rod. Limiting mechanisms are respectively provided at both ends of the inner cavity of the insulating tube, and the limiting mechanisms consist of limiting springs and limiting plates.

[0005] However, the above structure has the following drawbacks in practical use:

[0006] First, it cannot effectively cope with bending conditions. Although the protective sleeve itself has a certain degree of flexibility and the central rod and connecting rod can also play a certain supporting role, its supporting effect is limited when bending frequently or significantly. After long-term use, the wire harness may still experience accelerated wear due to excessive bending.

[0007] Secondly, the wear resistance is insufficient. This structure mainly focuses on functions such as segmentation protection, insulation, pressure resistance and fire prevention, and does not have an effective protective structure specifically designed for the wear of the wire harness. When the wire harness is subjected to external forces such as vibration and friction, wear is likely to occur, affecting the service life of the wire harness.

[0008] Therefore, it is necessary to design a wire harness anti-wear protective sleeve with excellent anti-wear performance and better able to cope with bending conditions. Utility Model Content

[0009] To solve one of the aforementioned technical problems, the present invention provides a wire harness anti-wear protective sleeve, comprising a flexible bending outer tube. The interior of the flexible bending outer tube is used to store multiple wire harnesses, with both ends of each wire harness extending outside the flexible bending outer tube. A central support member is inserted at the center of the flexible bending outer tube, with both ends of the central support member movably extending outside the flexible bending outer tube. The inner sidewalls of the central support member are used to constrain and limit the outer sidewalls of each wire harness. External threads are provided on the outer sidewalls of the vertical sections at both ends of the central support member, and an end guide plate is screwed onto each external thread. The ends of each wire harness pass through wire holes on the end guide plates at corresponding positions.

[0010] Based on any of the above technical solutions, a further optimization is made: the bending angle of the flexible bending outer tube is adjustable.

[0011] Based on any of the above technical solutions, a further optimization is made as follows: a constraint spring is provided on the inner side of the middle bending section of the flexible bending outer tube, and the two ends of the constraint spring are respectively fixedly installed on the outer side wall of the flexible bending outer tube on their corresponding sides. The constraint spring is used to prevent the flexible bending outer tube from bending excessively.

[0012] Based on any of the above technical solutions, a further optimization is made as follows: a bending cavity is provided inside the flexible bending outer tube, and a plurality of wire harness covering channels are uniformly spaced along the circumferential direction on the inner sidewall of the bending cavity for the corresponding wire harness to pass through. Each wire harness covering channel is consistent with the bending direction of the flexible bending outer tube, and the wire harness covering channel is used for the wire harness to pass through.

[0013] Based on any of the above technical solutions, a further optimization is made: each of the wire harness covering channels is provided with an adjustment side opening on its inner side.

[0014] Based on any of the above technical solutions, a further optimization is made as follows: the central support includes a central copper bend tube arranged along the central axis of the bending cavity, both ends of the central copper bend tube extending movably to the outside of the bending cavity, and external threads are provided on the outer side walls of the straight pipe sections at both ends of the central copper bend tube.

[0015] Based on any of the above technical solutions, a further optimization is made: the interior of the central copper bend tube is provided with a heat dissipation central cavity with open ends.

[0016] Based on any of the above technical solutions, a further optimization is made by fixing several end wear-resistant rings at intervals along the length direction on the outer side wall of the straight pipe sections at both ends of the flexible curved outer tube.

[0017] Based on any of the above technical solutions, a further optimization is made by fixing a number of central wear-resistant rings at intervals along the bending direction on the outer wall of the middle bending section of the flexible bending outer tube.

[0018] Based on any of the above technical solutions, a further optimization is made: the space between the outer wall of the central copper bend and the inner wall of the bend cavity forms an annular heat dissipation cavity.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1. This utility model, through the combination structure of a flexible bending outer tube, a central support component, and an end guide plate, can simultaneously provide centralized protection and constraint for multiple wire harnesses. Furthermore, by adjusting the bending angle of the flexible bending outer tube, it can constrain and guide the wire harnesses to different degrees of bending, adapting to different installation and laying conditions.

[0021] 2. The central support component of this utility model adopts a central copper bent tube, which not only enhances the structural strength of the entire protective sleeve, but also utilizes the high thermal conductivity of copper to absorb and conduct the heat generated by each wire harness in a timely manner. Combined with the heat dissipation central cavity and annular heat dissipation cavity, it effectively improves the heat dissipation effect of the wire harness.

[0022] 3. This utility model provides an adjustment side opening inside the wire harness covering channel, which not only ensures the relative freedom of the wire harness within the wire harness covering channel and avoids damage caused by excessive restraint, but also creates a heat dissipation path between the inside of the channel and the bending cavity, further optimizing heat dissipation performance.

[0023] 4. This utility model provides end wear-resistant rings and middle wear-resistant rings at the two straight pipe sections and the middle curved section of the flexible curved outer tube, respectively, which significantly enhances the wear resistance of the easily worn parts of the protective sleeve. At the same time, the positioning effect of the end guide plate on the central support ensures the stability of the overall structure and extends the service life of the protective sleeve and the internal wiring harness. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, the elements or components are not necessarily drawn to scale.

[0025] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0026] Figure 2 This is a schematic diagram of the main structure of this utility model.

[0027] Figure 3This is a three-dimensional structural diagram of the central support component of this utility model.

[0028] Figure 4 This is a three-dimensional structural diagram of the present invention after the central support member has been removed.

[0029] Figure 5 for Figure 4 A schematic diagram of the internal structure in the view from the front.

[0030] In the diagram, 1. Flexible bending outer tube; 2. External thread; 3. End guide plate; 4. Wire hole; 5. Constraint spring; 6. Bending cavity; 7. Wire harness covering channel; 8. Adjustment side opening; 9. Central copper bending tube; 10. Heat dissipation center cavity; 11. End wear-resistant ring; 12. Middle wear-resistant ring; 13. Annular heat dissipation cavity. Detailed Implementation

[0031] The embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of the present utility model, and are therefore merely examples and should not be construed as limiting the scope of protection of the present utility model. The specific structure of the present utility model is as follows: Figures 1-5 As shown in the image.

[0032] Example 1: A wire harness anti-wear protective sleeve includes a flexible bending outer tube 1. The interior of the flexible bending outer tube 1 is used to store multiple wire harnesses. Both ends of each wire harness extend to the outside of the flexible bending outer tube 1. A central support member is inserted through the center of the flexible bending outer tube 1. Both ends of the central support member extend movably to the outside of the flexible bending outer tube 1. The inner sidewalls of the central support member are used to constrain and limit the outer sidewalls of each wire harness. External threads 2 are provided on the outer sidewalls of the vertical sections at both ends of the central support member. An end guide plate 3 is screwed onto each external thread 2. The ends of each wire harness pass through wire holes 4 on the end guide plate 3 at corresponding positions.

[0033] This utility model's wire harness anti-wear protective sleeve structure can simultaneously protect and constrain multiple wire harnesses, and can also constrain and guide the wire harnesses to different degrees of bending by controlling different bending angles of the flexible bending outer tube 1. After actual installation, the installation of the central support component can enhance the strength of the entire protective sleeve; in addition, the central support component can also conduct and absorb the heat generated by each wire harness during use, thereby improving the heat dissipation effect of each wire harness. Furthermore, the two end guide plates 3 set at the ends can further abut and position the two ends of the central support component, thereby ensuring the stability of the entire central support component after installation.

[0034] This utility model mainly realizes the functions of centralized storage, limiting constraint and end guidance of wire harness, avoiding wire harness exposure to the outside and being worn by the outside, while ensuring that the two ends of the wire harness extend normally to realize the connection function.

[0035] The flexible, curved outer tube 1 provides space for the wire harnesses. A central support is inserted at the center of the outer tube, and its internal sidewalls constrain and limit the wire harnesses, preventing them from tangling or shifting. The external threads 2 at both ends of the central support engage with the end guide plates 3. The end guide plates 3 guide the wire harnesses through the wire holes 4, achieving an orderly arrangement of the wire harness ends. The integrated design can accommodate multiple wire harnesses simultaneously. The cooperation between the central support and the end guide plates 3 achieves integrated constraint and guidance of the wire harnesses. The external thread 2 connection facilitates the installation and adjustment of the end guide plates 3.

[0036] The combined structure of the central support and the end guide plate 3 not only protects itself and the wiring harness, but also indirectly plays a preliminary role in planning the installation path of the wiring harness, reducing the waste of installation space caused by the random arrangement of the wiring harness.

[0037] Based on any of the above technical solutions, a further optimization is made: the bending angle of the flexible bending outer tube 1 is adjustable, which facilitates adaptation to different installation and laying conditions.

[0038] The flexible bending outer tube 1 is made of a material with a certain degree of flexibility. Its bending angle can be changed by external force, thereby adjusting the bending state of the internal wire harness to match different installation paths. The bending angle can be adjusted according to the spatial layout and routing requirements of the actual installation environment, reducing installation difficulty and improving the versatility of the device. Its main function is to adjust the bending angle, so that the protective sleeve and internal wire harness can adapt to different installation and laying conditions, thus expanding its application range.

[0039] Based on any of the above technical solutions, a further optimization is made as follows: a constraint spring 5 is provided on the inner side of the middle bending section of the flexible bending outer tube 1, and the two ends of the constraint spring 5 are respectively fixedly installed on the outer side wall of the flexible bending outer tube 1 on their corresponding sides. The constraint spring 5 is used to prevent the flexible bending outer tube 1 from bending excessively.

[0040] The constraint spring 5 is installed on the inner side of the middle bending section of the flexible bending outer tube 1, with its two ends fixed to the outer wall of the flexible bending outer tube 1 on the corresponding side of the bending section, forming a mechanical constraint on the middle bending section. When the flexible bending outer tube 1 is subjected to external force and attempts to bend excessively beyond the preset angle, the constraint spring 5 is stretched and generates a reverse tension, which is transmitted to the flexible bending outer tube 1 through the fixed points at both ends, preventing it from bending further and thus limiting its bending angle to a safe range.

[0041] Constraints are applied to the central bending section, precisely targeting key areas prone to excessive bending without affecting the normal bending adjustment of other parts of the flexible bending outer tube 1. Constraints are achieved through mechanical principles, requiring no electronic or hydraulic auxiliary devices, minimizing environmental impact, and ensuring high stability. The main structure and material properties of the flexible bending outer tube 1 are not altered, preserving its original adjustable bending function while limiting excessive bending, thus balancing flexibility and safety.

[0042] Based on any of the above technical solutions, a further optimization is made as follows: a bending cavity 6 is provided inside the flexible bending outer tube 1, and a plurality of wire harness covering channels 7 are uniformly spaced along the circumferential direction on the inner side wall of the bending cavity 6 for the corresponding wire harness to pass through. Each wire harness covering channel 7 is consistent with the bending direction of the flexible bending outer tube 1, and the wire harness covering channel 7 is used for the wire harness to pass through.

[0043] The bending cavity 6 inside the flexible bending outer tube 1 provides installation space for the wire harness covering channel 7. The wire harness covering channel 7 is evenly distributed along the circumferential direction of the inner sidewall of the bending cavity 6, and the direction of each channel is consistent with the bending direction of the flexible bending outer tube 1.

[0044] When the wire harness is inserted into the corresponding wire harness covering channel 7, the channel forms a physical constraint on the wire harness through the inner wall, so that the wire harness deforms synchronously along the channel direction when the flexible bending outer tube 1 bends, thus avoiding misalignment, entanglement or friction with other wire harnesses during the bending process.

[0045] Each wire harness covering channel 7 is separated from the others, allowing for independent storage of multiple wire harnesses and reducing mutual interference and wear. The channel direction is consistent with the bending direction of the outer tube, ensuring that the bending path of the wire harness matches the bending path of the outer tube, reducing stress concentration during wire harness bending, and protecting the wire harness insulation layer and internal conductors. The uniform circumferential distribution ensures balanced stress on each channel, avoiding poor heat dissipation or structural instability caused by localized wire harness density. This structure provides independent passage paths for multiple wire harnesses, achieving separation, constraint, and directional guidance of the wire harnesses, ensuring orderly arrangement of the wire harnesses during the bending process of the flexible bending outer tube 1, reducing mutual friction and damage, and providing structural support for the wire harnesses, enhancing overall tensile strength.

[0046] Based on any of the above technical solutions, a further optimization is made: each of the wire harness covering channels 7 has an adjustment side opening 8 on its inner side. This effectively ensures the relative freedom of the wire harness within the wire harness covering channel 7, while the open structure allows a passage to be formed between the interior of the wire harness covering channel 7 and the interior of the bending cavity 6, ensuring heat dissipation.

[0047] Each wire harness covering channel 7 has an adjustment opening 8 on its inner side, making the inside of the channel open. This opening breaks the closed state of the channel, allowing the wire harness to move slightly inside the wire harness covering channel 7, avoiding excessive binding of the wire harness due to the channel being completely closed; on the other hand, the opening connects the internal space of the wire harness covering channel 7 with the internal space of the bending cavity 6, forming a heat transfer path, so that the heat generated by the wire harness during operation can be diffused through the opening to the bending cavity 6, and then dissipated to the outside through the bending cavity 6.

[0048] The adjustable side opening 8 retains the basic constraint function of the wire harness covering channel 7 on the wire harness, preventing the wire harness from leaving the channel, while also providing the wire harness with a certain amount of room to move through the open structure, avoiding damage to the wire harness due to rigid restraint.

[0049] The opening connects the wire harness covering channel 7 with the bending cavity 6, making the heat dissipation path smoother. It forms a collaborative heat dissipation system with the bending cavity 6 and other heat dissipation structures (such as the central support and the heat dissipation center cavity 10), thereby improving the overall heat dissipation efficiency.

[0050] It can be seen that its core functions include: first, ensuring the relative freedom of the wire harness within the wire harness covering channel 7 to prevent mechanical damage caused by excessive constraint; second, constructing a heat dissipation path between the wire harness covering channel 7 and the bending cavity 6 to promote heat dissipation of the wire harness and avoid affecting the performance of the wire harness due to local heat accumulation.

[0051] Based on any of the above technical solutions, a further optimization is made as follows: the central support includes a central copper bend 9 arranged along the central axis of the bending cavity 6, both ends of the central copper bend 9 extending movably to the outside of the bending cavity 6, and the external threads 2 are provided on the outer side walls of the straight pipe sections at both ends of the central copper bend 9.

[0052] The central support component adopts a central copper elbow 9 structure, arranged along the central axis of the bending cavity 6, with both ends extending movably out of the bending cavity 6 to form a through support. The central copper elbow 9 utilizes the rigidity of copper to provide structural support for the entire protective sleeve, while also using the high thermal conductivity of copper to conduct heat generated by the internal wiring harness. The external threads 2 on the outer walls of the straight pipe sections at both ends engage with the internal threads of the end guide discs 3, enabling a detachable connection between the central copper elbow 9 and the end guide discs 3, thereby positioning and fixing the central copper elbow 9 through the end guide discs 3.

[0053] The support force is evenly distributed on the inner wall of the flexible curved outer tube 1 by setting it along the central axis of the bending cavity 6, so as to avoid deformation of the outer tube caused by excessive local stress.

[0054] Based on any of the above technical solutions, a further optimization is made: the interior of the central copper bend 9 is provided with a heat dissipation central cavity 10 with both ends open.

[0055] The heat dissipation center cavity 10 inside the central copper bend tube 9 is open at both ends, forming a through airflow channel. The heat absorbed by the wire harness by the central copper bend tube 9 is partly conducted to the external environment through its tube wall, and partly exchanged with the outside air through the heat dissipation center cavity 10. That is, the outside cold air enters from one end of the heat dissipation center cavity 10, absorbs heat, and flows out from the other end, accelerating heat dissipation and thus enhancing the overall heat dissipation efficiency.

[0056] Based on the heat conduction of the central copper bend tube 9, an air convection heat dissipation method is added to the heat dissipation center cavity 10, forming a dual heat dissipation mechanism that significantly improves the heat dissipation effect. The hollow heat dissipation center cavity 10 design ensures the supporting strength of the central copper bend tube 9 while reducing the amount of material used, lowering the overall weight, and facilitating installation and operation.

[0057] Example 2: Compared with Example 1, this example also includes the following technical features:

[0058] Based on any of the above technical solutions, a further optimization is made by fixing a number of end wear-resistant rings 11 at intervals along the length direction on the outer side wall of the straight pipe sections at both ends of the flexible curved outer tube 1.

[0059] The end wear-resistant rings 11 are fixedly formed on the outer wall at intervals along the length of the straight pipe sections at both ends of the flexible curved outer tube 1. Utilizing the wear-resistant material properties of the wear-resistant rings themselves, when the straight pipe sections at the ends of the flexible curved outer tube 1 come into contact with or rub against external objects (such as mounting brackets, other pipelines, etc.), the end wear-resistant rings 11 directly bear the frictional force, reducing the wear on the outer wall of the flexible curved outer tube 1 body, thereby protecting the end structure of the outer tube.

[0060] Precisely positioned at both ends of the straight pipe section—a location prone to friction during installation and use—provides targeted protection and avoids unnecessary material waste.

[0061] Based on any of the above technical solutions, a further optimization is made by fixing a number of central wear-resistant rings 12 at intervals along the bending direction on the outer wall of the middle bending section of the flexible bending outer tube 1.

[0062] The central wear-resistant ring 12 is fixedly formed on the outer wall at intervals along the bending direction of the central bending section of the flexible bending outer tube 1. Utilizing the high wear-resistant material properties of the wear-resistant ring, when the central bending section rubs or collides with external objects (such as equipment housings, pipes, walls, etc.) during use, the central wear-resistant ring 12 directly contacts and bears the frictional force, reducing the wear on the outer wall of the flexible bending outer tube 1 body, thereby protecting the structural integrity of the central bending section.

[0063] Focusing on the central curved section, a critical part that is prone to wear and tear due to its curved shape and high probability of contact with the outside world, the protection target is clear, and the efficiency of material utilization is improved.

[0064] The outer tube is set along the bending direction and conforms to the shape of the middle bending section. It does not affect the bending function of the flexible bending outer tube 1, and the spaced distribution avoids the decrease in bending flexibility caused by continuous setting.

[0065] Based on any of the above technical solutions, a further optimization is made: the space between the outer wall of the central copper bend 9 and the inner wall of the bend cavity 6 forms an annular heat dissipation cavity.

[0066] An annular heat dissipation cavity is naturally formed between the outer wall of the central copper bend 9 and the inner wall of the bend cavity 6. This cavity surrounds the central copper bend 9 and is connected to the outside at both ends. A portion of the heat absorbed by the wire harness by the central copper bend 9 is conducted through its own wall to the annular heat dissipation cavity. The air inside the cavity exchanges heat with the outer wall of the central copper bend 9 and the inner wall of the bend cavity 6, while simultaneously dissipating the heat to the external environment through air convection, forming a surrounding heat dissipation path and improving overall heat dissipation efficiency.

[0067] The installation process is as follows:

[0068] Pre-processing preparation: Inspect the integrity of components such as the flexible bending outer tube 1, the central copper bend 9, and the end guide plate 3, ensuring that the external threads 2 of the straight sections at both ends of the central copper bend 9 are undamaged and that the wire holes 4 on the end guide plate 3 are unobstructed. According to the installation requirements, pre-adjust the flexible bending outer tube 1 to a suitable bending angle (if a constraint spring 5 is installed, ensure that it is in the normal limit state).

[0069] Install the central support and end guide plates 3: Insert the central copper bend 9 into the flexible bend outer tube 1 along the central axis of the bending cavity 6, allowing both ends to extend out of the outer tube. Screw the two end guide plates 3 onto the external threads 2 at both ends of the central copper bend 9, tightening them appropriately to achieve initial positioning (not fixed yet, leaving room for adjustment), ensuring that the position of the wire hole 4 on the end guide plate 3 matches the subsequent wire harness exit direction.

[0070] Threading multiple wire harnesses: Starting from one end of the flexible curved outer tube 1, each wire harness is sequentially passed through the wire hole 4 on the corresponding end guide plate 3, and then into the wire harness covering channel 7 inside the flexible curved outer tube 1. During the threading process, the orientation of the wire harness is adjusted using the adjustment side opening 8 inside the wire harness covering channel 7 to ensure its relative freedom within the channel, while simultaneously ensuring that the outer wall of the wire harness fits against the inner side wall of the central copper curved tube 9, achieving constraint and limitation. After threading, ensure that the other end of each wire harness exits from the wire hole 4 on the end guide plate 3 at the other end of the flexible curved outer tube 1.

[0071] Secure and adjust the end guide plates 3: Tighten the end guide plates 3 at both ends again so that they abut against the two ends of the positioning center copper bend 9 to ensure the stability of the center copper bend 9 after installation. Check the extension length and bending state of each wire harness. By fine-tuning the bending angle of the flexible bending outer tube 1 (if necessary), ensure that the wire harness is not excessively stretched or loosened, and finally complete the installation.

[0072] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model. For those skilled in the art, any alternative improvements or transformations made to the implementation of this utility model fall within the protection scope of this utility model.

[0073] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A wire harness anti-wear protective sleeve, characterized in that: The device includes a flexible, curved outer tube. The interior of the flexible, curved outer tube is used to store multiple wire harnesses. Both ends of each wire harness extend to the outside of the flexible, curved outer tube. A central support member is inserted through the center of the flexible, curved outer tube. Both ends of the central support member movably extend to the outside of the flexible, curved outer tube. The inner sidewalls of the central support member are used to constrain and limit the outer sidewalls of each wire harness. External threads are provided on the outer sidewalls of the vertical sections at both ends of the central support member. An end guide plate is screwed onto each of the external threads. The ends of each wire harness are exited through wire holes on the end guide plates at corresponding positions.

2. The anti-wear protective sleeve for wire harnesses according to claim 1, characterized in that: The bending angle of the flexible curved outer tube is adjustable.

3. The anti-wear protective sleeve for wire harnesses according to claim 2, characterized in that: A constraint spring is provided on the inner side of the middle bending section of the flexible bending outer tube. The two ends of the constraint spring are respectively fixedly installed on the outer side wall of the flexible bending outer tube on their corresponding sides. The constraint spring is used to prevent the flexible bending outer tube from bending excessively.

4. The anti-wear protective sleeve for wire harnesses according to claim 3, characterized in that: A bending cavity is provided inside the flexible bending outer tube. Several wire harness covering channels are uniformly spaced along the circumferential direction on the inner sidewall of the bending cavity for the corresponding wire harness to pass through. Each wire harness covering channel is consistent with the bending direction of the flexible bending outer tube and is used for the wire harness to pass through.

5. The anti-wear protective sleeve for wire harnesses according to claim 4, characterized in that: Each of the aforementioned wire harness covering channels has an adjustment side opening on its inner side.

6. The anti-wear protective sleeve for wire harnesses according to claim 5, characterized in that: The central support includes a central copper bend tube arranged along the central axis of the bending cavity. Both ends of the central copper bend tube extend movably to the outside of the bending cavity, and external threads are provided on the outer side walls of the straight sections at both ends of the central copper bend tube.

7. The anti-wear protective sleeve for wire harnesses according to claim 6, characterized in that: The central copper bend has a heat dissipation cavity with open ends.

8. The anti-wear protective sleeve for wire harnesses according to claim 7, characterized in that: Several end wear-resistant rings are fixedly formed at intervals along the length direction on the outer side wall of the straight pipe sections at both ends of the flexible curved outer tube.

9. The anti-wear protective sleeve for wire harnesses according to claim 8, characterized in that: Several wear-resistant rings are fixedly formed at intervals along the bending direction on the outer wall of the middle bending section of the flexible curved outer tube.

10. The anti-wear protective sleeve for wire harnesses according to claim 9, characterized in that: The space between the outer wall of the central copper bend and the inner wall of the bend cavity forms an annular heat dissipation cavity.

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