A charging gun and a wire harness fixing structure of the charging gun

Abstract

This application provides a charging gun and a wiring harness fixing structure for the charging gun, including a fixing base connected to the charging gun and a wire clamp disposed on the fixing base. The wire clamp is formed by a first clamping body and a second clamping body that can be closed to form a clamping hole for the cable to pass through. The clamping hole has a retaining tooth on its inner circumference, and the retaining tooth includes a plurality of first retaining parts and a plurality of second retaining parts. Both of them abut against the cable to form a pressure deformation zone, and the projection dimension of the first retaining part along the circumferential direction of the clamping hole is larger than that of the second retaining part, so as to improve the axial holding ability and circumferential rotation limiting ability of the cable, and reduce the transmission of external force to the internal connection parts of the charging gun.

Description

Technical Field

[0001] This application relates to the field of charging gun wiring harnesses, and more particularly to a wiring harness fixing structure for a charging gun. Background Technology

[0002] As a crucial component of new energy vehicle charging equipment, the charging gun typically has a cable connected to its tail for transmitting electrical energy and signals. Because the cable is relatively large in diameter and heavy, and is frequently subjected to pulling, bending, and twisting forces during actual use, a dedicated cable harness fixing structure is usually required at the connection point between the cable and the charging gun. This structure encloses and secures the cable, preventing it from directly impacting the internal connection points of the charging gun and improving the stability and lifespan of the connection.

[0003] In existing technologies, common charging gun cable harness fixing structures often employ a spiral rotation tightening structure. This type of structure is typically located at the connection between the charging gun and the cable. Through the relative rotation between the inner and outer mating parts, the clamping part gradually retracts inward, thereby clamping and fixing cables of different outer diameters. Because this structure allows for adjustment of the clamping size through rotation, it has good adaptability to different cable specifications, and the installation and assembly process is relatively convenient, thus it is widely used.

[0004] However, the aforementioned spiral-rotating cable harness fixing structure primarily relies on overall tightening to secure the cable. In actual use, users often grasp and shake the cable or use it to help pull out the charging gun, causing the connection between the cable and the charging gun to bear significant axial tensile and circumferential torsional loads. When the cable is subjected to both axial tension and circumferential torsion, it is prone to displacement or rotation relative to the fixing structure. Since the cable and the charging gun are typically connected internally via crimping or welding, prolonged use can lead to solder joint breakage, affecting the reliability of the charging gun. Summary of the Invention

[0005] In view of this, it is necessary to provide a wiring harness fixing structure for a charging gun to solve the above problems.

[0006] The embodiments of this application provide a wire harness fixing structure for a charging gun, used to surround and fix the cable, including a fixing base connected to the charging gun and a wire clamp disposed on the fixing base; The wire clamp includes a first clamp body and a second clamp body that can close together. The first clamp body and the second clamp body surround a clamping hole for the cable to pass through. The inner circumference of the clamping hole is provided with circumferentially spaced teeth. The teeth include a plurality of first clamping parts and a plurality of second clamping parts. Each first clamping part and each second clamping part abuts against the cable to press the cable to form a pressure deformation zone. When viewed along the axial direction of the clamping hole, the projected size of the first clamping part along the circumference of the clamping hole is larger than the projected size of the second clamping part along the circumference of the clamping hole, so as to limit the axial displacement and circumferential rotation of the cable relative to the clamp.

[0007] In at least one embodiment of this application, when viewed along the axial direction of the clamping hole, the midpoint of the line connecting the mating ends of the first clamping body and the second clamping body is defined as O, and the two outermost endpoints of the contact contour of the first clamping part abutting the cable in the circumferential direction of the clamping hole are A and B, respectively, and the two outermost endpoints of the contact contour of the second clamping part abutting the cable in the circumferential direction of the clamping hole are C and D, respectively. Wherein, the line OA and the line OB form a first angle, and the line OC and the line OD form a second angle, satisfying that the first angle is greater than the second angle.

[0008] In at least one embodiment of this application, the length of the line connecting A and B is defined as a, and the length of the line connecting C and D is defined as b, satisfying 1.5b≤a≤3b.

[0009] In at least one embodiment of this application, the first clamp and the second clamp have a mating surface that abuts each other. The first clamp is provided with a first holding part on the inner circumferential surface near both sides of the mating surface. The second holding part is provided between the two first holding parts. The first holding part and the second holding part on the first clamp are symmetrically provided on the second clamp along the mating surface.

[0010] In at least one embodiment of this application, when the first clamp and the second clamp are closed, a deformation cavity is formed between the first clamping parts that are disposed opposite to each other. After the cable is deformed by pressure, part of it extends into the deformation cavity and abuts against the first clamping parts on opposite sides of the deformation cavity to restrict the circumferential rotation of the cable.

[0011] In at least one embodiment of this application, the fixing base is provided with engaging grooves spaced apart along the circumferential direction, and the first clamp and the second clamp are respectively provided with engaging structures that cooperate with the engaging grooves, so that the first clamp and the second clamp are engaged on the fixing base.

[0012] In at least one embodiment of this application, the engaging structure includes a main body and a positioning protrusion disposed on the side of the main body near the fixed seat, and the fixed seat is further provided with a positioning groove that cooperates with the positioning protrusion. Each of the positioning slots extends along the insertion direction of the positioning protrusion into the corresponding positioning slot, and the length of each positioning slot along the insertion direction is equal, so that the cable is centered relative to the fixed seat, and the first clamp and the second clamp hold the cable evenly.

[0013] In at least one embodiment of this application, the fixing structure further includes a sheath sleeved on the outer periphery of the cable. The outer periphery of the sheath facing the fixing seat is recessed inward to form a first annular groove and a second annular groove spaced apart along the axial direction of the cable. The wire clamp includes a first annular protrusion and a second annular protrusion. The first annular protrusion extends into the first annular groove, and the second annular protrusion extends into the second annular groove to encircle and fix the sheath. The first annular groove is located on the side close to the fixed base, and the groove depth of the first annular groove along the radial direction of the sheath is greater than the groove depth of the second annular groove.

[0014] In at least one embodiment of this application, the sheath further includes a first segment and a second segment arranged sequentially along its axial direction, wherein the first annular groove and the second annular groove are disposed on the first segment; The wall thickness of the sheath decreases sequentially from the first section toward the second section, and the first section is a continuous wall structure, while the outer circumferential surface of the second section is provided with multiple clearance grooves at intervals.

[0015] Embodiments of this application provide a charging gun including the wiring harness fixing structure of a charging gun as described above.

[0016] The aforementioned charging gun wiring harness fixing structure, by setting a fixing base and a wire clamp on the fixing base, allows the wire clamp to stably surround the outer periphery of the cable. A clamping hole is formed by the first clamping body and the second clamping body, thus providing a covering and pressing effect on the cable. A first clamping part and a second clamping part are provided on the inner periphery of the clamping hole. The projected dimension of the first clamping part along the circumference of the clamping hole is larger than that of the second clamping part. Therefore, the first clamping part can exert a larger range of contact and pressing force on the cable. When the cable is subjected to axial tension, it is easier to form a larger range of compression deformation zone on the outer periphery of the cable, and to form stable contact with this compression deformation zone, thereby improving the axial retention capability of the cable relative to the wire clamp. Compared to the first clamping part, the second clamping part provides more concentrated contact with the cable, creating local limiting points on the outer periphery of the cable. These local limiting points, in conjunction with the larger pressure deformation zone formed by the first clamping part, create differentiated pressure states for the cable within the clamping area. When the cable tends to rotate circumferentially, the local limiting point formed by the second clamping part can suppress the initial rotation of the cable, while the larger contact formed by the first clamping part further increases the resistance when the cable continues to rotate, thus jointly improving the circumferential rotation limiting capability of the cable relative to the clamp.

[0017] Meanwhile, by installing a fixing seat between the cable clamp and the charging gun, the cable tension, torsional load, and swaying force borne by the cable clamp can be first borne and transferred by the fixing seat, rather than acting directly on the charging gun body. This reduces the direct transmission of force from the cable clamp to the internal connection parts of the charging gun. It helps to reduce the concentrated effect of external forces at the tail connection of the charging gun, reducing the risk of loosening, fatigue, and breakage of the crimped or welded parts. Attached Figure Description

[0018] Figure 1 This is a perspective view of a wire harness fixing structure according to an embodiment of this application.

[0019] Figure 2 for Figure 1 An exploded perspective view of the wire harness fixing structure described above.

[0020] Figure 3 for Figure 1 The sheath of the wire harness fixing structure and the exploded view of the wire harness.

[0021] Figure 4 for Figure 1 A cross-sectional view of the wire harness fixing structure described above.

[0022] Figure 5 for Figure 4 An enlarged view of part A of the described wire harness fixing structure.

[0023] Figure 6 for Figure 1 A front view of the wire clamp of the wire harness fixing structure described above.

[0024] Figure 7 for Figure 1 A perspective view of another embodiment of the wire clamp of the wire harness fixing structure described above.

[0025] Figure 8 for Figure 1 A perspective view of the fixing base of the wire harness fixing structure.

[0026] Explanation of main component symbols 100. Wire harness fixing structure; 10. Fixing base; 11. Engaging groove; 12. Positioning groove; 20. Wire clamp; 21. First clamping body; 22. Second clamping body; 23. Butt joint surface; 24. Clamping hole; 25. Clamping tooth; 251. First clamping part; 252. Second clamping part; 26. Deformation cavity; 27. Engaging structure; 271. Main body; 272. Positioning protrusion; 28. First annular protrusion; 29. ​​Second annular protrusion; 30. Cable; 40. Sheath; 41. First annular groove; 42. Second annular groove; 43. First section; 44. Second section; 441. Relief groove. Detailed Implementation

[0027] The embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0028] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may also have an intervening component. When a component is considered to be "placed" on another component, it can be directly placed on the other component or may also have an intervening component. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "back," and similar expressions used in this article are for illustrative purposes only.

[0029] An embodiment of this application provides a wire harness fixing structure for a charging gun, used to surround and fix the cable, characterized in that it includes a fixing base connected to the charging gun and a wire clamp disposed on the fixing base; The wire clamp includes a first clamp body and a second clamp body that can close together. The first clamp body and the second clamp body surround a clamping hole for the cable to pass through. The inner circumference of the clamping hole is provided with circumferentially spaced teeth. The teeth include a plurality of first clamping parts and a plurality of second clamping parts. Each first clamping part and each second clamping part abuts against the cable to press the cable to form a pressure deformation zone. When viewed along the axial direction of the clamping hole, the projected size of the first clamping part along the circumference of the clamping hole is larger than the projected size of the second clamping part along the circumference of the clamping hole, so as to limit the axial displacement and circumferential rotation of the cable relative to the clamp.

[0030] The aforementioned charging gun wiring harness fixing structure, by setting a fixing base and a wire clamp on the fixing base, allows the wire clamp to stably surround the outer periphery of the cable. A clamping hole is formed by the first clamping body and the second clamping body, thus providing a covering and pressing effect on the cable. A first clamping part and a second clamping part are provided on the inner periphery of the clamping hole. The projected dimension of the first clamping part along the circumference of the clamping hole is larger than that of the second clamping part. Therefore, the first clamping part can exert a larger range of contact and pressing force on the cable. When the cable is subjected to axial tension, it is easier to form a larger range of compression deformation zone on the outer periphery of the cable, and to form stable contact with this compression deformation zone, thereby improving the axial retention capability of the cable relative to the wire clamp. Compared to the first clamping part, the second clamping part provides more concentrated contact with the cable, creating local limiting points on the outer periphery of the cable. These local limiting points, in conjunction with the larger pressure deformation zone formed by the first clamping part, create differentiated pressure states for the cable within the clamping area. When the cable tends to rotate circumferentially, the local limiting point formed by the second clamping part can suppress the initial rotation of the cable, while the larger contact formed by the first clamping part further increases the resistance when the cable continues to rotate, thus jointly improving the circumferential rotation limiting capability of the cable relative to the clamp.

[0031] Meanwhile, by installing a fixing seat between the cable clamp and the charging gun, the cable tension, torsional load, and swaying force borne by the cable clamp can be first borne and transferred by the fixing seat, rather than acting directly on the charging gun body. This reduces the direct transmission of force from the cable clamp to the internal connection parts of the charging gun. It helps to reduce the concentrated effect of external forces at the tail connection of the charging gun, reducing the risk of loosening, fatigue, and breakage of the crimped or welded parts.

[0032] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0033] Please see Figures 1-8 This application provides a wiring harness fixing structure 100 for a charging gun, which is used to surround and fix the cable 30. The wiring harness fixing structure 100 is located in the cable exit area at the tail of the charging gun, and is mainly used to establish a stable tail fixing relationship between the cable 30 and the charging gun, so as to reduce the possibility of axial movement and circumferential rotation of the cable 30 during use.

[0034] Specifically, the wire harness fixing structure 100 includes a fixing base 10 and a wire clamp 20. The fixing base 10 is connected to the charging gun, and the wire clamp 20 is mounted on the fixing base 10. The fixing base 10 is located between the charging gun and the wire clamp 20, providing a mounting base for the wire clamp 20 and bearing and transferring the external forces borne by the wire clamp 20. In this way, when the cable 30 is subjected to tensile, swinging, or torsional loads, the external force will not be directly concentrated on the tail connection area of ​​the charging gun, but will first be transmitted from the wire clamp 20 to the fixing base 10, and then transferred from the fixing base 10 to the charging gun, thereby helping to reduce the stress concentration at the tail connection position.

[0035] The cable clamp 20 includes a first clamp body 21 and a second clamp body 22 that can be closed together. With the separate structure of the first clamp body 21 and the second clamp body 22, the cable clamp 20 can be directly wrapped and installed from the outside of the cable 30, which is more suitable for the actual assembly scenario of the charging gun tail.

[0036] Furthermore, the first clamping body 21 and the second clamping body 22 have a mating surface 23. The mating surface 23 is used to define the relative position and boundary relationship when the two are closed. By setting the mating surface 23, the first clamping body 21 and the second clamping body 22 can obtain a clear fitting reference when they are closed, thereby reducing assembly offset and facilitating the subsequent formation of stable clamping holes 24.

[0037] Specifically, the first clamp 21 and the second clamp 22, when closed together, form a clamping hole 24, through which the cable 30 passes. It should be noted that the clamping hole 24 is not merely a cable passage, but rather the main area where the cable 30 is covered and held. With the clamping hole 24 formed, the clamp 20 can apply circumferential restraint to the cable 30, rather than only locally pressing it on one side, thereby improving overall clamping stability.

[0038] The clamping hole 24 has circumferentially spaced locking teeth 25. Each locking tooth 25 includes a plurality of first locking portions 251 and a plurality of second locking portions 252. Each first locking portion 251 and each second locking portion 252 protrudes inward from the clamping hole 24 and abuts against the outer periphery of the cable 30. Viewed axially along the clamping hole 24, the projected size of the first locking portion 251 along the circumferential direction of the clamping hole 24 is larger than that of the second locking portion 252. Therefore, the clamping range formed between the first locking portion 251 and the cable 30 is larger, while the clamping range formed between the second locking portion 252 and the cable 30 is smaller and more concentrated. Thus, although both the first locking portion 251 and the second locking portion 252 act on the cable 30, the compressive deformation of the cable 30 caused by them is different.

[0039] Specifically, the first clamping part 251 has a large projected size along the circumference of the clamping hole 24. This means that the first clamping part 251 forms a wider clamping band around the outer periphery of the cable 30, rather than just a localized point pressure. When the cable clamp 20 closes and clamps the cable 30, the first clamping part 251 will press out a large area of ​​pressure deformation around the outer periphery of the cable 30. Because this pressure deformation area extends further in the circumferential direction, when the cable 30 is subjected to axial tension and attempts to move relative to the cable clamp 20 along the cable axial direction, a more stable abutment and blocking relationship can be formed between the first clamping part 251 and this pressure deformation area. Therefore, the first clamping part 251 is mainly used to improve the axial holding ability of the cable 30 relative to the cable clamp 20.

[0040] Furthermore, the second clamping part 252 has a smaller projected size along the circumference of the clamping hole 24, resulting in a more concentrated pressure on the cable 30. Instead of forming a large area of ​​pressure on the outer periphery of the cable 30, the second clamping part 252 forms relatively concentrated local pressure points or areas. When the cable 30 is subjected to a torsional load and attempts to rotate circumferentially relative to the clamp 20, the local limiting points formed by the second clamping part 252 preferentially resist the outer periphery of the cable 30, thereby suppressing the initial rotational tendency of the cable 30. Therefore, the second clamping part 252 is mainly used to improve the initial rotational limitation capability of the cable 30 relative to the clamp 20.

[0041] Furthermore, the first clamping part 251 and the second clamping part 252 do not function independently, but rather work together on the outer periphery of the same cable 30, creating differentiated pressure states for the cable 30 within the clamping hole 24. Specifically, the first clamping part 251 forms a larger area of ​​pressure deformation, while the second clamping part 252 forms locally concentrated limiting points. Thus, when the cable 30 is subjected to axial tension, the area of ​​pressure formed by the first clamping part 251 provides the main axial resistance, while the local pressure points formed by the second clamping part 252 further enhance local stability. When the cable 30 is subjected to circumferential torsional load, the local limiting points formed by the second clamping part 252 preferentially suppress initial rotation, while the larger area of ​​contact formed by the first clamping part 251 provides greater resistance as the cable 30 continues to rotate. Therefore, through the cooperative relationship of "area of ​​pressure + local limiting," the first clamping part 251 and the second clamping part 252 enable the cable 30 to simultaneously obtain good axial holding capability and circumferential rotation limiting capability within the same clamping hole 24.

[0042] It should be noted that the functions of the first clamping part 251 and the second clamping part 252 are not separate. While improving the axial holding capability, the first clamping part 251 also hinders the circumferential rotation of the cable 30; while the second clamping part 252 forms a local limiting point to suppress the initial rotation of the cable 30, it also participates in the overall clamping of the outer periphery of the cable 30. The essence of the two is that the first clamping part 251 focuses more on forming a stable clamping relationship over a larger range, while the second clamping part 252 focuses more on forming a more concentrated local limiting relationship. After the two work together, the cable 30 is less likely to shift or rotate relative to the clamp 20 when subjected to a combined load.

[0043] In one specific embodiment, the wire harness fixing structure described in this application was subjected to tensile and torque tests. During the test, the sample was fixed on the testing device, ensuring that the axis of the cable 30 entering the sample remained vertical. A tensile force of 750 N was then applied to the cable 30 and held for 60 seconds, followed by a torque of 16.3 N·m and held for another 60 seconds. The test results showed that the sample displacement was 2.0 mm, meeting the requirement that the maximum displacement not exceed 5 mm. This indicates that, by employing the differentiated clamping structure of the first clamping part 251 and the second clamping part 252, the cable 30 can maintain a relatively stable limiting relationship with the wire clamp 20, effectively restricting the axial displacement and circumferential rotation of the cable 30 even under the combined action of large tensile force and torsional load.

[0044] Furthermore, bending tests were conducted on the samples. Test conditions included: applying a 140N load to the end of cable 30, reciprocating bending with a 45° swing angle on each side in the vertical direction, a total swing angle of 90°, a bending frequency of 60 CPM, and 20,000 bending cycles. Test results showed that neither sample 1 nor sample 2 cracked after the test. This indicates that after the sheath 40 adopts a segmented structure of first section 43 and second section 44, the first section 43 near the clamp 20 maintains strong overall rigidity, while the second section 44, equipped with multiple clearance grooves 441, provides corresponding clearance capacity, thus enabling the sheath 40 to maintain good structural stability under repeated bending conditions.

[0045] Furthermore, the sample underwent high-temperature and high-humidity aging and sealing verification. Test conditions included aging at 85℃ / 85%RH for 1008 hours, followed by IPX7 immersion and air-blowing tests. The IPX7 conditions involved immersion in 1m water for 30 minutes, and the air-blowing test conditions were 7.5 bar for 60 seconds. Test results showed that after aging, no water ingress occurred during the IPX7 test, and no air bubbles escaped during the air-blowing test. This indicates that the connection structure formed between the fixing seat 10, the clamp 20, and the sheath 40 maintains good fit stability and sealing reliability even after long-term environmental aging.

[0046] In summary, the wire harness fixing structure 100, through the combination of a fixing base 10, a wire clamp 20, a first clamp 21, a second clamp 22, a clamping hole 24, and two different types of holding parts, enables the cable 30 to achieve a stable, enveloping clamping relationship at the tail of the charging gun. The fixing base 10 is responsible for bearing and transferring external forces, the wire clamp 20 is responsible for surrounding and pressing the cable 30, and the first holding part 251 and the second holding part 252 respectively enhance axial retention and circumferential rotation limitation through differentiated pressing relationships. This structure is suitable for AC charging guns and DC charging guns for new energy vehicles, as well as other electrical connection devices that require stable fixing of the tail-end cable, especially suitable for application scenarios where the cable 30 is relatively thick, used frequently, and the tail connection area is easily subjected to pulling and twisting.

[0047] It should be noted that, in order to verify the actual effect of the proposed solution, a combined tensile and torque test was conducted on the sample. Under the condition that the cable 30 was subjected to a tensile force of 750N and a torque of 16.3N·m, the sample displacement was 2.0mm, which meets the requirement that the maximum displacement is not greater than 5mm. This indicates that the proposed solution can effectively limit the axial displacement and circumferential rotation of the cable 30 relative to the clamp 20.

[0048] Furthermore, the samples were subjected to 140N load, 90° swing, 60CPM, and 20,000 bending tests. After the tests, neither sample 1 nor sample 2 cracked, indicating that the segmented structure and gradually changing wall thickness of the sheath 40 can adapt to repeated bending conditions and has good crack resistance.

[0049] Furthermore, after aging at 85℃ / 85%RH for 1008h, the sample showed no water ingress in the IPX7 test and no air bubbles escaped in the air blowing test, indicating that the proposed solution still has good connection stability and sealing reliability under long-term environmental stress.

[0050] In one specific embodiment, viewed along the axial direction of the clamping hole 24, the midpoint of the line connecting the mating ends of the first clamping body 21 and the second clamping body 22 is taken as the reference point O. Further, the two outermost endpoints of the contact contour between the first clamping part 251 and the cable 30 in the circumferential direction of the clamping hole 24 are A and B, respectively; the two outermost endpoints of the contact contour between the second clamping part 252 and the cable 30 in the circumferential direction of the clamping hole 24 are C and D, respectively. Connecting A and B from point O forms lines OA and OB; connecting C and D from point O forms lines OC and OD; wherein lines OA and OB form a first angle, and lines OC and OD form a second angle, and the first angle is greater than the second angle.

[0051] Specifically, the selection of the aforementioned reference point O and the four boundary points A, B, C, and D further clarifies the difference in the circumferential projected dimensions of the first clamping part 251 and the second clamping part 252 along the clamping hole 24. By unifying the reference point O and the boundary points A, B, C, and D, the relationship of "projected dimension greater than" can be further transformed into a geometric expression of "the first included angle is greater than the second included angle." In this way, the contour difference between the first clamping part 251 and the second clamping part 252 is no longer limited to a general size comparison, but has a unified reference, unified point selection, and unified comparison method.

[0052] Furthermore, by using the midpoint of the line connecting the mating ends as reference point O, the comparison between the first clamping part 251 and the second clamping part 252 can be established under the same reference conditions. By using the two outermost endpoints of the abutment contour in the circumferential direction of the clamping hole 24 as A, B, C, and D, the boundary ranges of the actual pressing action between the two types of clamping parts and the cable 30 can be directly corresponded. Thus, the first included angle and the second included angle can more accurately reflect the difference in the circumferential coverage of the cable 30 formed by the first clamping part 251 and the second clamping part 252, and help to more clearly demonstrate the structural characteristics of the first clamping part 251 forming a larger range of pressing and the second clamping part 252 forming a more concentrated local limiting, thereby further supporting the realization of axial retention and circumferential rotation limitation of the cable 30.

[0053] In summary, by setting a reference point O and determining four boundary points A, B, C, and D, the projected dimensional relationship between the first clamping part 251 and the second clamping part 252 along the circumferential direction of the clamping hole 24 is given a more specific geometric definition. Without changing the core functional logic, the clarity and verifiability of the structural differences between the two types of clamping parts are improved.

[0054] In one specific embodiment, the first clamp 21 and the second clamp 22 can be assembled in a way that allows for independent locking of the two halves. Specifically, the first clamp 21 and the second clamp 22 are respectively disposed on opposite sides of the outer periphery of the cable 30. During assembly, the first clamp 21 and the second clamp 22 are first wrapped around the outer periphery of the cable 30, and then locked together by snaps, slots, screws, locking pins, or other locking structures, thereby forming a clamping hole 24. With this assembly method, the first clamp 21 and the second clamp 22 can complete the wrapping of the cable 30 by separate installation and subsequent locking, resulting in a relatively simple structure that is easy to assemble.

[0055] In another specific embodiment, one end of the first clamp 21 and the second clamp 22 can be pre-connected by a rotatable connection structure. Specifically, one end of the first clamp 21 and the second clamp 22 is connected to each other by a pin, a shaft, a bearing connector, or other rotatable connector, forming a fulcrum on that side; the other side of the first clamp 21 and the second clamp 22 is an opening and closing end. During assembly, the two clamps can rotate relative to each other around the fulcrum and move closer to each other, forming a clamp-like closing action. After the first clamp 21 and the second clamp 22 are closed in place, the opening and closing end is fixed by a locking structure, thereby forming a clamping hole 24 and completing the clamping of the cable 30. With this method, the first clamp 21 and the second clamp 22 have a clear rotational guiding relationship during assembly, which is beneficial to improving assembly convenience and closing stability.

[0056] Furthermore, regardless of whether the first clamp 21 and the second clamp 22 are locked independently or by rotating one side and locking the other side, as long as the first clamp 21 and the second clamp 22 can be closed together to form a clamping hole 24, and the first holding part 251 and the second holding part 252 provided on the inner periphery of the clamping hole 24 can form differentiated pressure on the cable 30, the technical concept of this application can be realized.

[0057] In one specific embodiment, the length of the line connecting A and B is defined as 'a', and the length of the line connecting C and D is defined as 'b', satisfying 1.5b ≤ a ≤ 3b. Using this numerical range, based on the premise that the first included angle is greater than the second included angle, it is possible to further quantify and limit the difference in the circumferential expansion of the first holding part 251 and the second holding part 252 in the holding hole 24, so that the structural difference between the two types of holding parts is no longer merely a qualitative comparison, but has a clear proportional defining relationship.

[0058] Specifically, 'a' represents the extended length of the contact contour of the first clamping part 251 abutting against the cable 30 in the circumferential direction of the clamping hole 24, and 'b' represents the extended length of the contact contour of the second clamping part 252 abutting against the cable 30 in the circumferential direction of the clamping hole 24. Limiting 'a' to 1.5 to 3 times that of 'b' ensures that the first clamping part 251 has a sufficiently significant circumferential extension difference compared to the second clamping part 252, making the pressing area formed by the first clamping part 251 on the cable 30 significantly larger than that of the second clamping part 252. At the same time, it avoids the local limiting effect of the second clamping part 252 being weakened due to the excessive extension range of the first clamping part 251, thereby maintaining an appropriate structural division of labor between the two types of clamping parts.

[0059] Furthermore, when a is less than 1.5b, the difference between the first clamping part 251 and the second clamping part 252 in the circumferential direction of the clamping hole 24 is relatively small, which is not conducive to stably reflecting the difference between the two types of clamping parts; when a is greater than 3b, the expansion range of the first clamping part 251 in the circumferential direction of the clamping hole 24 is too large, and the local concentrated limiting feature of the second clamping part 252 in the overall clamping is relatively weakened. Therefore, limiting the ratio of a to b to the range of 1.5 to 3 can make the first clamping part 251 and the second clamping part 252 form a more reasonable circumferential distribution ratio within the wire clamp 20.

[0060] In summary, by limiting the relationship between the length a of the line connecting A and B and the length b of the line connecting C and D to 1.5b≤a≤3b, the proportional relationship between the first clamping part 251 and the second clamping part 252 in the circumferential unfolding length of the clamping hole 24 can be further refined, so that the geometric differences can be given more explicit numerical support, and it is beneficial to improve the clarity of the structural features of the two types of clamping parts and the consistency of implementation.

[0061] In one specific embodiment, the first clamp 21 and the second clamp 22 have mating surfaces 23 that connect with each other. With the mating surface 23, the first clamp 21 and the second clamp 22 have clear relative boundaries and mating references when closed, and the position of the clamping hole 24 can also be limited to a relatively stable area. Specifically, the mating surface 23 is located on the side of the first clamp 21 and the second clamp 22 facing each other, and the first clamp 21 and the second clamp 22 fit together through the mating surface 23 when closed.

[0062] Specifically, the first clamp 21 has first holding portions 251 on its inner circumferential surface near the mating surface 23, and a second holding portion 252 is located between the two first holding portions 251. That is, when viewed along the extension direction of the inner circumferential surface of the first clamp 21, the first holding portions 251 are located on both sides, and the second holding portions 252 are located in the middle, thus forming a "wider on both sides and narrower in the middle" arrangement of the clamping teeth 25 on the first clamp 21. This arrangement directly defines the pressing distribution of the inner circumferential surface of the first clamp 21 on the cable 30, so that the cable 30 forms a larger contact area with the first holding portions 251 near the sides, and a more concentrated contact area with the second holding portions 252 in the middle.

[0063] Furthermore, the first holding portion 251 and the second holding portion 252 on the first clamp 21 are symmetrically arranged on the second clamp 22 along the mating surface 23. With this symmetrical arrangement, the first holding portion 251 and the second holding portion 252 on the second clamp 22 form a one-to-one mirror image distribution relative to the first clamp 21. Thus, when the first clamp 21 and the second clamp 22 are closed together, the first holding portions 251 on both sides of the first clamp 21 can be in relative positions with their corresponding first holding portions 251 on the second clamp 22, and the second holding portion 252 in the middle can also be in relative positions with its corresponding second holding portion 252 on the other clamp. Therefore, the clamping structure of the first clamp 21 and the second clamp 22 in the circumferential direction of the clamping hole 24 remains consistent, avoiding misalignment of the cable 30 due to inconsistent arrangement on one side.

[0064] Furthermore, by symmetrically arranging the first clamping body 21 and the second clamping body 22 about the mating surface 23, the circumferential structure defined by the first holding part 251 and the second holding part 252 on the inner periphery of the clamping hole 24 becomes more regular. Thus, after the cable 30 passes through the clamping hole 24, the pressing action from the first clamping body 21 and the second clamping body 22 can form a corresponding relationship on both sides of the clamping hole 24, ensuring that the larger-area pressing action formed by the first holding part 251 and the more concentrated local pressing action formed by the second holding part 252 are symmetrically distributed circumferentially. This symmetrical distribution helps to create a more uniform pressure state for the cable 30 within the clamping hole 24, reducing the possibility of excessive pressure on one side or insufficient pressure on the other.

[0065] In summary, by providing first holding portions 251 on the first clamping body 21 near both sides of the mating surface 23, and placing second holding portions 252 between the two first holding portions 251, and then symmetrically arranging this arrangement along the mating surface 23 on the second clamping body 22, the first clamping body 21 and the second clamping body 22 can form a regular and corresponding circumferential clamping structure after being closed. This structure, on the one hand, helps to improve the consistency of clamping the cable 30 by the first clamping body 21 and the second clamping body 22, and on the other hand, helps the first holding portions 251 and the second holding portions 252 to work together on the cable 30 according to predetermined positions, providing a more stable structural foundation for the axial holding and circumferential rotation limitation of the cable 30.

[0066] In one specific embodiment, when the first clamp 21 and the second clamp 22 are closed, a deformation cavity 26 is formed between the opposing first holding portions 251. Specifically, the first holding portions 251 are located on the inner circumferential surfaces of their respective clamps near the mating surface 23. Therefore, after the first clamp 21 and the second clamp 22 are closed along the mating surface 23, a partial clearance space is formed between the two opposing first holding portions 251, which is the deformation cavity 26. The deformation cavity 26 is located on both sides of the area corresponding to the clamping hole 24 and is adjacent to the pressing area of ​​the first holding portion 251, so that when the first holding portion 251 presses the cable 30, it can not only abut against the cable 30 from the outer periphery, but also reserve a partial deformation entry space on its opposite side.

[0067] Specifically, after the first clamp 21 and the second clamp 22 are closed, the cable 30 is jointly pressed by the first holding part 251 and the second holding part 252. Because the first holding part 251 has a large projected size along the circumferential direction of the clamping hole 24, the cable 30 is more likely to undergo a large-scale localized compressive deformation at the corresponding position. After this localized deformation occurs, the corresponding portion of the cable 30 extends towards the deformation cavity 26. Thus, the deformation cavity 26 can accommodate the locally deformed portion of the cable 30, allowing the compressive deformation of the cable 30 in the area corresponding to the first holding part 251 to be controlled towards the deformation cavity 26, thereby making the fit between the cable 30 and the first holding part 251 more stable.

[0068] Furthermore, when the partially deformed portion of the cable 30, after being compressed, extends into the deformation cavity 26, it will abut against the first holding portions 251 on opposite sides of the deformation cavity 26. Thus, the effect of the first holding portions 251 on the cable 30 is expanded from simple compression to locking and limiting the partially deformed portion. Furthermore, when the cable 30 has a tendency to rotate circumferentially, the partially deformed portion already inserted into the deformation cavity 26 will preferentially abut against the first holding portions 251 on opposite sides of the deformation cavity 26. If the cable 30 continues to rotate circumferentially, the partially deformed portion needs to overcome the restriction of the first holding portions 251 on opposite sides to rotate further. Therefore, the deformation cavity 26 enhances the limiting relationship of the first holding portions 251 on the cable 30 from the original peripheral compression to abutment restriction after partial embedding.

[0069] In summary, by forming a deformation cavity 26 between the opposing first clamping portions 251 when the first clamp 21 and the second clamp 22 are closed, a space is provided for the cable 30 to undergo partial deformation after being compressed, and the partially deformed portion abuts against the first clamping portions 251 on opposite sides of the deformation cavity 26. Thus, the effect of the first clamping portions 251 on the cable 30 is expanded from simple pressing to partial locking and limiting, thereby more effectively restricting the circumferential rotation of the cable 30 relative to the clamp 20.

[0070] In one specific embodiment, the fixing base 10 is provided with circumferentially spaced engaging grooves 11, and the first clamp 21 and the second clamp 22 are respectively provided with engaging structures 27 that cooperate with the engaging grooves 11. With this engagement method, the first clamp 21 and the second clamp 22 are installed on the fixing base 10 through the interlocking relationship between the engaging grooves 11 and the engaging structures 27, thereby forming a relatively stable assembly connection between the wire clamp 20 and the fixing base 10.

[0071] Specifically, the engaging grooves 11 are provided on the fixing base 10 and are distributed at intervals along the circumference of the fixing base 10. With this arrangement, the fixing base 10 can provide corresponding assembly interfaces for the first clamp 21 and the second clamp 22 at multiple positions in the circumference, so that when the first clamp 21 and the second clamp 22 are installed on the fixing base 10, they are not connected by a single position, but are simultaneously constrained at multiple intervals. Therefore, the installation stability of the first clamp 21 and the second clamp 22 relative to the fixing base 10 is improved, and it is beneficial to maintain the overall circumferential positional relationship of the wire clamp 20.

[0072] Furthermore, the first clamp 21 and the second clamp 22 are respectively provided with engaging structures 27, which correspond one-to-one with engaging grooves 11 on the fixing base 10. During assembly, as the first clamp 21 and the second clamp 22 move closer to the fixing base 10, the engaging structures 27 gradually enter the corresponding engaging grooves 11 and form a snap-fit ​​relationship after reaching the predetermined position. Thus, the first clamp 21 and the second clamp 22 can be reliably fixed in the installation position by the fixing base 10, and are less likely to loosen or shift relative to the fixing base 10 when the cable 30 is under stress.

[0073] Furthermore, by employing the engagement groove 11 and engagement structure 27, a clearer connection path is formed between the first clamp 21, the second clamp 22, and the fixing base 10. When the cable 30 is subjected to tensile, swaying, or torsional loads, the external force exerted by the cable 30 on the first clamp 21 and the second clamp 22 can first act on the engagement structure 27, and then be transmitted to the fixing base 10 through the engagement structure 27, from where it continues to transition towards the charging gun. In this way, the first clamp 21 and the second clamp 22 can form a more stable force-bearing support relationship with the help of the fixing base 10.

[0074] In summary, by creating circumferentially spaced engaging grooves 11 on the fixed base 10 and providing engaging structures 27 on the first clamp 21 and the second clamp 22 respectively to cooperate with the engaging grooves 11, the first clamp 21 and the second clamp 22 can be installed on the fixed base 10 in a snap-fit ​​manner. This not only improves the assembly stability between the wire clamp 20 and the fixed base 10, but also helps the wire clamp 20 to form a stable force transmission relationship with the fixed base 10 when subjected to external force from the cable 30, thus providing a reliable structural foundation for the continuous clamping and limiting of the cable 30.

[0075] In one specific embodiment, the engaging structure 27 includes a main body 271 and a positioning protrusion 272 disposed on the side of the main body 271 near the fixing seat 10. The main body 271 is disposed in the engaging groove 11, and the fixing seat 10 is also provided with a positioning groove 12 that cooperates with the positioning protrusion 272. In this way, the engaging structure 27 further provides a positioning function on the basis of engaging. Specifically, after the main body 271 enters the engaging groove 11, it can form a basic constraint on the position of the first clamp 21 and the second clamp 22 relative to the fixing seat 10; the positioning protrusion 272 is further inserted into the corresponding positioning groove 12, which can more precisely define the assembly position of the first clamp 21 and the second clamp 22 relative to the fixing seat 10.

[0076] Furthermore, each positioning groove 12 extends along the insertion direction of the positioning protrusion 272 into the corresponding positioning groove 12. This arrangement provides a clear guiding path for the positioning protrusion 272 as it enters the positioning groove 12, preventing oblique insertion, misalignment, or localized interference during assembly. Moreover, the lengths of each positioning groove 12 along the insertion direction are equal. This consistent length ensures that the depth to which the corresponding positioning protrusions 272 of the first clamp 21 and the second clamp 22 enter their respective positioning grooves 12 remains consistent during assembly onto the fixing base 10, resulting in a more stable positional relationship between the clamping hole 24 formed by the first clamp 21 and the second clamp 22 and the fixing base 10.

[0077] Furthermore, with all the positioning grooves 12 having equal lengths, the cable 30 can remain centered relative to the fixing seat 10 when it passes through the clamping hole 24. If the cable 30 becomes eccentric at the fixing seat 10, the clamping relationship between the first clamping part 251 and the second clamping part 252 on the inner circumference of the clamping hole 24 can easily result in one side being overly clamped and the other side underlying. By using the positioning protrusion 272 and the positioning grooves 12 of equal length, the first clamping body 21 and the second clamping body 22 can achieve a more consistent assembly position on the fixing seat 10, allowing the clamping hole 24 to form a more symmetrical covering relationship with the cable 30. Therefore, the cable 30 is more easily centered relative to the fixing seat 10, and the first clamping body 21 and the second clamping body 22 can also form a more uniform clamping relationship with the cable 30.

[0078] In summary, by making the engaging structure 27 include a main body 271 and a positioning protrusion 272, with the main body 271 located within the engaging groove 11 and the positioning protrusion 272 engaging with the positioning groove 12, and by setting the lengths of each positioning groove 12 along the insertion direction to be equal, an assembly relationship of "main body engaging + positioning guidance + equal length limiting" can be formed between the first clamp 21, the second clamp 22, and the fixing seat 10. This not only improves the assembly accuracy of the first clamp 21 and the second clamp 22 relative to the fixing seat 10, but also helps to keep the cable 30 centered relative to the fixing seat 10, and allows the first clamp 21 and the second clamp 22 to provide a more uniform clamping grip on the cable 30.

[0079] In one specific embodiment, the wire harness fixing structure 100 further includes a sheath 40 sleeved around the outer periphery of the cable 30. Specifically, the sheath 40 is disposed around the outer periphery of the cable 30 and located between the fixing base 10 and the exposed section of the cable 30, and is used to cooperate with the wire clamp 20 to form a covering and transition for the tail area of ​​the cable 30. With the sheath 40, when the cable 30 enters the area where the wire clamp 20 is located, it no longer directly engages with the wire clamp 20 with its exposed outer periphery, but is fixed through the structural interlocking relationship between the sheath 40 and the wire clamp 20, thereby improving the overall stability of the tail structure.

[0080] Specifically, the outer peripheral surface of the sheath 40 facing the fixing base 10 is recessed inward to form a first annular groove 41 and a second annular groove 42 spaced apart along the axial direction of the cable 30. By adopting the structure of the inwardly recessed annular grooves, the sheath 40 forms two locally mating positions distributed axially at one end near the fixing base 10, which are used to engage with corresponding structures on the wire clamp 20. Furthermore, the first annular groove 41 and the second annular groove 42 are spaced apart along the axial direction of the cable 30, so that the sheath 40 no longer relies solely on a single groove for fixation at the same end, but instead forms two separate mating areas, thereby making the connection between the sheath 40 and the wire clamp 20 more stable.

[0081] Furthermore, the clamp 20 includes a first annular protrusion 28 and a second annular protrusion 29. The first annular protrusion 28 extends into the first annular groove 41, and the second annular protrusion 29 extends into the second annular groove 42. This arrangement creates two sets of corresponding groove-protrusion mating relationships between the clamp 20 and the sheath 40. Specifically, after the sheath 40 is fitted around the outer periphery of the cable 30, the clamp 20 encircles the sheath 40. The first annular protrusion 28 and the second annular protrusion 29 on the clamp 20 respectively enter the first annular groove 41 and the second annular groove 42 on the sheath 40, thus restricting the sheath 40 relative to the clamp 20 both axially and radially. Therefore, the sheath 40 is not simply an independent sleeve fitted around the outer periphery of the cable 30, but is stably fixed within the clamp 20 through the interlocking relationship between the first annular groove 41, the second annular groove 42, and the first annular protrusion 28 and the second annular protrusion 29.

[0082] Furthermore, after the first annular protrusion 28 extends into the first annular groove 41 and the second annular protrusion 29 extends into the second annular groove 42, the clamp 20 can encircle and fix the sheath 40. This "encircling and fixing" specifically means that the clamp 20, through its circumferential covering structure, surrounds the sheath 40 internally. Simultaneously, the corresponding engagement of the first annular protrusion 28, the second annular protrusion 29, and the first annular groove 41 and the second annular groove 42 prevents the sheath 40 from easily loosening relative to the clamp 20, axially shifting, or partially flipping. Thus, a relatively stable assembly connection is formed between the sheath 40 and the clamp 20, allowing the sheath 40 to function as part of the transition area at the tail of the cable 30, working together with the clamp 20 to support the cable 30.

[0083] Specifically, the first annular groove 41 is located on the side closer to the fixing base 10, and the groove depth of the first annular groove 41 along the radial direction of the sheath 40 is greater than the groove depth of the second annular groove 42. The fact that the first annular groove 41 is closer to the fixing base 10 and has a greater depth means that the sheath 40 forms a more sufficient embedding space at this position, allowing the first annular protrusion 28 to enter the first annular groove 41 more deeply, thereby improving the locking degree between the sheath 40 and the wire clamp 20 on the side closer to the fixing base 10. The groove depth of the second annular groove 42 is less than the groove depth of the first annular groove 41, meaning that the sheath 40 retains a greater local wall thickness at the position corresponding to the second annular groove 42. Thus, while maintaining the fit between the second annular protrusion 29 and the second annular groove 42, the corresponding area on the outer side of the sheath 40 can retain better structural thickness and load-bearing capacity.

[0084] In summary, by providing a first annular groove 41 and a second annular groove 42 spaced apart along the axial direction of the cable 30 on the outer peripheral surface of the sheath 40 facing the fixing seat 10, and by having the first annular protrusion 28 and the second annular protrusion 29 on the clamp 20 extend into the corresponding annular grooves, the clamp 20 can form a ring-shaped fixing relationship with the sheath 40. Furthermore, by making the first annular groove 41 closer to the fixing seat 10 deeper than the second annular groove 42, a stronger locking fit can be formed on the inner side, while a larger wall thickness is retained on the outer side. This improves the fixing stability of the sheath 40 while also taking into account the load-bearing requirements of the sheath 40 under bending conditions.

[0085] In one specific embodiment, the sheath 40 includes a first segment 43 and a second segment 44 sequentially along its axial direction, with a first annular groove 41 and a second annular groove 42 disposed on the first segment 43. Specifically, the first segment 43 is located on the side closer to the fixing base 10 and the wire clamp 20, while the second segment 44 is located on the side farther from the fixing base 10. The first segment 43 has a continuous wall structure, and the wall thickness of the sheath 40 decreases sequentially from the first segment 43 toward the second segment 44; the outer circumferential surface of the second segment 44 is provided with a plurality of clearance grooves 441 spaced apart. Thus, the first segment 43 has a more complete wall structure and greater overall rigidity than the second segment 44, while the second segment 44 has a relatively stronger clearance capacity due to the provision of multiple clearance grooves 441.

[0086] Furthermore, the continuous wall structure of the first segment 43 cooperates with the first annular groove 41 and the second annular groove 42 provided on the segment, enabling the first segment 43 to maintain a relatively stable structural support when forming a groove-protrusion fit with the wire clamp 20. Specifically, the first annular groove 41 and the second annular groove 42 cooperate with the first annular protrusion 28 and the second annular protrusion 29 on the wire clamp 20, respectively. After the first segment 43 maintains a continuous wall structure, its corresponding area can provide a more continuous and complete circumferential support boundary, making it less likely for the structure around the groove to weaken the overall load-bearing capacity due to local interruption.

[0087] Furthermore, the depth of the first annular groove 41 is greater than that of the second annular groove 42, meaning that the groove portion near the fixing seat 10 is embedded more deeply, resulting in a stronger locking fit at the corresponding position. Based on this, the first segment 43 adopts a continuous wall structure and maintains a relatively larger wall thickness, ensuring that the first segment 43 still possesses good overall rigidity near the deep groove position. Thus, when the sheath 40 is subjected to bending forces, tensile forces, or external forces transmitted from the cable 30, the first segment 43 can not only maintain a stable fit with the clamp 20 but also more effectively transmit the external forces to the clamp 20, preventing premature deformation near the groove due to excessively thin structure or wall interruption.

[0088] In summary, the sheath 40, through the segmented arrangement of the first section 43 and the second section 44, forms a structural relationship where the side closer to the fixing seat 10 has strong overall rigidity, while the side farther from the fixing seat 10 has strong clearance capacity. Furthermore, considering the difference in depth between the first annular groove 41 and the second annular groove 42, the first section 43 not only provides stable support for the groove-protrusion fit between the sheath 40 and the wire clamp 20, but also better transmits the external force on the sheath 40 to the wire clamp 20, thereby improving the overall stability of the connection area between the sheath 40 and the wire clamp 20.

[0089] A charging gun includes all the structures in the wiring harness fixing structure 100 of the charging gun described above. Since this embodiment includes all the features of the above embodiments, it has all the beneficial effects of the above embodiments, and will not be repeated here.

[0090] The above description is merely an embodiment of this application. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this application, but these improvements all fall within the protection scope of this application.

Claims

1. A wire harness fixing structure for a charging gun, used to surround and fix the cable, characterized in that, It includes a mounting base connected to the charging gun and a wire clamp disposed on the mounting base; The wire clamp includes a first clamp body and a second clamp body that can close together. The first clamp body and the second clamp body surround a clamping hole for the cable to pass through. The inner circumference of the clamping hole is provided with circumferentially spaced teeth. The teeth include a plurality of first clamping parts and a plurality of second clamping parts. Each first clamping part and each second clamping part abuts against the cable to press the cable to form a pressure deformation zone. When viewed along the axial direction of the clamping hole, the projected size of the first clamping part along the circumference of the clamping hole is larger than the projected size of the second clamping part along the circumference of the clamping hole, so as to limit the axial displacement and circumferential rotation of the cable relative to the clamp.

2. The wiring harness fixing structure for a charging gun according to claim 1, characterized in that, Viewed along the axial direction of the clamping hole, the midpoint of the line connecting the mating ends of the first clamping body and the second clamping body is defined as O. The two outermost endpoints of the contact contour of the first clamping part abutting the cable in the circumferential direction of the clamping hole are A and B, respectively. The two outermost endpoints of the contact contour of the second clamping part abutting the cable in the circumferential direction of the clamping hole are C and D, respectively. Wherein, the line OA and the line OB form a first angle, and the line OC and the line OD form a second angle, satisfying that the first angle is greater than the second angle.

3. The wiring harness fixing structure for a charging gun according to claim 2, characterized in that, Let the length of the line connecting A and B be a, and the length of the line connecting C and D be b, satisfying 1.5b≤a≤3b.

4. The wiring harness fixing structure for a charging gun according to claim 1, characterized in that, The first clamp and the second clamp have a mating surface that connects with each other. The first clamp is provided with a first holding part on the inner circumferential surface near both sides of the mating surface. The second holding part is provided between the two first holding parts. The first holding part and the second holding part on the first clamp are symmetrically provided on the second clamp along the mating surface.

5. The wiring harness fixing structure for a charging gun according to claim 4, characterized in that, When the first clamp and the second clamp are closed, a deformation cavity is formed between the first clamping parts that are arranged opposite each other. After the cable is deformed by pressure, part of it extends into the deformation cavity and abuts against the first clamping parts on opposite sides of the deformation cavity to restrict the circumferential rotation of the cable.

6. The wiring harness fixing structure for a charging gun according to claim 1, characterized in that, The fixing base is provided with circumferentially spaced engagement grooves, and the first clamp and the second clamp are respectively provided with engagement structures that cooperate with the engagement grooves, so that the first clamp and the second clamp are engaged on the fixing base.

7. The wiring harness fixing structure for a charging gun according to claim 6, characterized in that, The engaging structure includes a main body and a positioning protrusion located on the side of the main body near the fixed seat. The main body is located in the engaging groove, and the fixed seat is also provided with a positioning groove that cooperates with the positioning protrusion. Each of the positioning slots extends along the insertion direction of the positioning protrusion into the corresponding positioning slot, and the length of each positioning slot along the insertion direction is equal, so that the cable is centered relative to the fixed seat, and the first clamp and the second clamp hold the cable evenly.

8. The wiring harness fixing structure for a charging gun according to claim 1, characterized in that, The fixing structure also includes a sheath sleeved around the outer periphery of the cable. The outer periphery of the sheath facing the fixing seat is recessed inward to form a first annular groove and a second annular groove spaced apart along the axial direction of the cable. The wire clamp includes a first annular protrusion and a second annular protrusion. The first annular protrusion extends into the first annular groove, and the second annular protrusion extends into the second annular groove to encircle and fix the sheath. The first annular groove is located on the side close to the fixed base, and the groove depth of the first annular groove along the radial direction of the sheath is greater than the groove depth of the second annular groove.

9. The wiring harness fixing structure for a charging gun according to claim 8, characterized in that, The sheath also includes a first section and a second section integrally formed along its axial direction, with the first annular groove and the second annular groove disposed on the first section; The wall thickness of the sheath decreases sequentially from the first section toward the second section, and the first section is a continuous wall structure, while the outer circumferential surface of the second section is provided with multiple clearance grooves at intervals.

10. A charging gun, characterized in that, Includes a wiring harness fixing structure for a charging gun as described in any one of claims 1-9.

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