A bending-resistant flexible cable for a charging pile

Abstract

The present application relates to the technical field of cable, especially to a bending-resistant flexible cable for charging pile, comprising a cable, one end of the cable is provided with an interface wire segment bending relief limiting mechanism, one end of the cable is provided with an axial tensile force unloading mechanism, one end of the axial tensile force unloading mechanism is provided with a connecting mechanism. The bending-resistant flexible cable for charging pile protects the interface wire segment of the charging pile through the tapered stress release sleeve, the end locking ring, the bearing sleeve, the elastic return rib and the flexible connecting rib, reduces the conductor fatigue caused by the frequent dragging, swinging and bending of the charging gun, unloads and buffers the axial tensile force through the tensile woven belt, the sliding buffer sleeve and the buffer spring, reduces the tensile force directly acting on the conductive wire core and the interface end, forms the connecting structure capable of being quickly locked and disassembled through the plug, the arc-shaped sliding block and the stress ring, and improves the bending-resistant capability, the tensile stability and the on-site replacement and maintenance convenience of the charging pile cable.

Description

Technical Field

[0001] This invention relates to the field of cable technology, and in particular to a flexible, bend-resistant cable for charging piles. Background Technology

[0002] Charging pile cables are important conductive components in electric vehicle charging equipment that connect charging piles, charging guns, and vehicle charging interfaces. They are typically used for extended periods outdoors, in underground garages, public charging stations, and in high-frequency charging and discharging scenarios. Because users need to repeatedly drag, bend, retract, and plug and unplug the charging gun during the charging process, the area near the interface end of the cable is prone to combined loads of bending, torsion, and axial tension. If this area lacks segmented bending limiting and tension relief structures, problems such as outer sheath wear, insulation layer cracking, conductive core fatigue, loose interface ends, and localized overheating can easily occur.

[0003] Existing flexible cables for charging piles mostly improve overall flexibility by softening materials, stranding conductors, or changing sheath formulations. However, at the charging gun interface section, the flexible cable still transitions abruptly from a soft cable section to a rigid interface section, resulting in significant stress concentration during bending. In addition, the end connection structures of ordinary charging pile cables mostly adopt fixed crimping, threaded connections, or overall rubber wrapping, which cannot buffer and relieve axial tension during frequent dragging, nor is it convenient to quickly disassemble and maintain the interface transition section.

[0004] To address the aforementioned issues, a search revealed an invention patent with publication number CN114023497A, which discloses a DC charging pile cable. The patent proposes that the cable includes a power core conductor, an auxiliary power core conductor, a control core conductor, a wrapping layer, and a sheath layer. The sheath layer is constructed using components such as polyolefin elastomer, polypropylene resin, flame-retardant filler, antioxidant, and crosslinking agent to improve the charging pile cable's oil resistance, flame retardancy, and sheath performance. While this solution improves performance by focusing on the cable's body material and multi-core conductor structure, it primarily emphasizes the sheath formulation, insulation structure, and oil and flame retardancy. It lacks segmented bending limiters, elastic return ribs, and flexible connecting ribs for the charging gun interface segment. Furthermore, it does not utilize tensile braided tape, sliding buffer sleeves, and buffer springs to create an axial force relief path, nor does it incorporate a force-bearing ring, an arc-shaped slider, and a quick-connect locking structure with a push plate. Therefore, there is still room for improvement in terms of interface end bending resistance, tensile buffering, and rapid disassembly and maintenance.

[0005] In light of this, in-depth research into the aforementioned issues led to the creation of this case. Summary of the Invention

[0006] The purpose of this invention is to provide a bend-resistant flexible cable for charging piles, addressing the issues raised in the background section. While existing flexible cables for charging piles often improve overall flexibility through material softening, conductor stranding, or sheath formulation, at the charging gun interface section, the flexible cable still abruptly transitions from a soft cable section to a rigid interface section, resulting in significant stress concentration during bending. Furthermore, the common end-connection structures of ordinary charging pile cables often employ fixed crimping, threaded connections, or overall rubber coating, which cannot buffer and relieve axial tension during frequent dragging, and also hinder quick disassembly and maintenance of the interface transition section.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a bend-resistant flexible cable for charging piles, comprising a cable, One end of the cable is provided with an interface segment bending limit mechanism, one end of the cable is provided with an axial tensile stress relief mechanism, and one end of the axial tensile stress relief mechanism is provided with a connecting mechanism. The interface segment bend limiting mechanism includes a conical stress relief sleeve, one end of which is connected to an end locking ring. A bearing sleeve is provided on the inner side of the end locking ring, and a segmented bend limiting guard is sleeved on the outer side of the bearing sleeve. The outer side of the segmented bend limiting guard has annular limiting grooves at equal intervals. Elastic return ribs are connected between the segmented bend limiting guards, and a bending limiting gap is provided between the segmented bend limiting guards. One end of the elastic return rib is connected to a flexible connecting rib.

[0008] Preferably, the inner side of the cable is provided with wear-resistant ribs, the inner side of the wear-resistant ribs is provided with tensile reinforcing cores, the inner side of the tensile reinforcing cores is provided with an insulating layer, and a conductive core is provided at the center of the insulating layer.

[0009] Preferably, the tapered stress relief sleeve is fitted onto the outer side of the cable end, and the end locking ring is located at one end of the bearing sleeve.

[0010] Preferably, the segmented bending limit guard is provided with multiple sets on the outside of the bearing sleeve.

[0011] Preferably, the annular limiting groove is formed on the outer surface of the segmented bending limit guard joint, and the flexible connecting rib is provided on the inner side of the annular limiting groove.

[0012] Preferably, the axial tensile stress relief mechanism includes a tensile braided belt, one end of which is connected to an inner clamping pressure ring, and an outer clamping pressure ring is provided on the outer side of the tensile braided belt. An anchoring sleeve is connected to one side of the outer clamping pressure ring, a sliding buffer sleeve is sleeved on the outer side of the anchoring sleeve, a buffer spring is sleeved on the outer side of the sliding buffer sleeve, a tension limiting step is provided at one end of the sliding buffer sleeve, and a terminal isolation seat is connected to one end of the buffer spring.

[0013] Preferably, the inner clamping pressure ring and the outer clamping pressure ring are mutually fitted at the end of the tensile braided strip, the sliding buffer sleeve is slidably fitted on the outside of the anchor sleeve, and the buffer spring is located between the sliding buffer sleeve and the tension limiting step.

[0014] Preferably, the connecting mechanism includes a plug block, one end of which is provided with an adapter cable sleeve, one end of which is connected to a fixing block, a slot is provided on one side of the fixing block, an installation groove is provided on the inner side of the fixing block, a return spring is connected to the inner side of the installation groove, a guide rod is provided on the inner side of the installation groove, and a sliding groove is provided on the inner side of the installation groove.

[0015] Preferably, one end of the insert is connected to a tapered stress relief sleeve.

[0016] Preferably, the outer side of the adapter cable sleeve is provided with a rotating groove, the inner side of the rotating groove is slidably connected to an arc-shaped slider, one side of the arc-shaped slider is connected to a connecting rod, one end of the connecting rod is connected to a push plate, the push plate slides inside the mounting groove and is connected to a return spring and a guide rod, the connecting rod moves inside the sliding groove, and a force-bearing ring is connected above the arc-shaped slider.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. This type of flexible cable for charging piles features a bend-resistant design. It utilizes a tapered stress-relief sleeve, end locking ring, bearing sleeve, segmented bend-limiting guards, annular limiting grooves, elastic return ribs, bend-limiting gaps, and flexible connecting ribs to form a gradual bending limiting mechanism for the interface segment. This prevents the charging pile cable from bearing external sway at a single bending point near the charging gun or transfer end. Instead, the bending angle is dispersed by multiple segments of bend-limiting guards, excessive bending is limited by the bend-limiting gaps, and the elastic return ribs and flexible connecting ribs provide reset and overall constraint. This reduces the risk of cable end insulation cracking, conductor fatigue, and localized overheating at the interface, improving the bending resistance of the charging pile cable under frequent dragging conditions.

[0018] 2. This type of flexible cable for charging piles features a bend-resistant design. It utilizes a tapered stress-relief sleeve, end locking ring, bearing sleeve, segmented bend-limiting guards, annular limiting grooves, elastic return ribs, bend-limiting gaps, and flexible connecting ribs to form a gradual bending limiting mechanism for the interface segment. This prevents the charging pile cable from bearing external sway at a single bending point near the charging gun or transfer end. Instead, the bending angle is dispersed by multiple segments of bend-limiting guards, excessive bending is limited by the bend-limiting gaps, and the elastic return ribs and flexible connecting ribs provide reset and overall constraint. This reduces the risk of cable end insulation cracking, conductor fatigue, and localized overheating at the interface, thus improving the charging pile's electrical performance. The cable's resistance to bending under frequent dragging conditions is enhanced by a connecting mechanism consisting of a plug, adapter cable sleeve, fixing block, slot, mounting groove, return spring, guide rod, slide, rotating groove, push plate, connecting rod, arc-shaped slider, and force ring. When the adapter cable sleeve is replaced or repaired, it can be quickly positioned through the plug and slot. The rotating force ring drives the arc-shaped slider and connecting rod to move, causing the push plate to press and lock the plug. During disassembly, the force ring is pushed in the opposite direction, and the push plate is retracted and reset by the return spring, thereby releasing the limit. Compared with traditional bolt-tightened or integral non-removable structures, this invention is more convenient for on-site inspection, replacement, and maintenance, and can reduce the probability of vibration loosening. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of the cable of the present invention; Figure 3 This is a schematic diagram of the interface segment bending limiting mechanism of the present invention; Figure 4 This is a schematic diagram of the structure of the segmented bending limit guard joint of the present invention used in conjunction with the elastic return rib. Figure 5 This is a schematic diagram of the axial tensile force relief mechanism of the present invention; Figure 6 This is a schematic diagram of the connection mechanism structure of the present invention; Figure 7 This is a schematic diagram of the structure of the force-bearing ring and push plate of the present invention. Figure 8 For the present invention Figure 7 Enlarged structural diagram at point A in the middle.

[0020] In the diagram: 1. Cable; 2. Interface segment bend limiting mechanism; 201. Conical stress relief sleeve; 202. End locking ring; 203. Bearing sleeve; 204. Segmented bend limiting guard joint; 205. Annular limiting groove; 206. Elastic return rib; 207. Bending limiting gap; 208. Flexible connecting rib; 3. Axial tensile stress relief mechanism; 301. Tensile braided strip; 302. Inner clamping pressure ring; 303. Outer clamping pressure ring; 304. Anchoring sleeve; 305. Sliding buffer sleeve; 306. 307. Buffer spring; 308. Tension limit step; 4. Terminal isolation seat; 401. Connecting mechanism; 402. Insert block; 403. Adapter cable sleeve; 404. Fixing block; 405. Slot; 406. Mounting slot; 407. Return spring; 408. Guide rod; 409. Slide groove; 410. Rotating groove; 411. Push plate; 412. Connecting rod; 413. Arc-shaped slider; 414. Force ring; 5. Wear-resistant rib; 6. Tensile reinforcing core; 7. Insulation layer; 8. Conductive wire core. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figure 1-8 This invention provides a technical solution: a bend-resistant flexible cable for charging piles, comprising cable 1, One end of the cable 1 is provided with an interface segment bending limit mechanism 2, one end of the cable 1 is provided with an axial tensile stress relief mechanism 3, and one end of the axial tensile stress relief mechanism 3 is provided with a connecting mechanism 4. The interface segment bend limiting mechanism 2 includes a conical stress relief sleeve 201. One end of the conical stress relief sleeve 201 is connected to an end locking ring 202. A bearing sleeve 203 is provided on the inner side of the end locking ring 202. A segmented bend limiting guard section 204 is sleeved on the outer side of the bearing sleeve 203. The outer side of the segmented bend limiting guard section 204 is provided with annular limiting grooves 205 at equal intervals. Elastic return ribs 206 are connected between the segmented bend limiting guard sections 204. A bending limiting gap 207 is provided, and one end of the elastic return rib 206 is connected to a flexible connecting rib 208. Through the setting of the interface segment bending limiting mechanism 2, the end of the cable 1 near the charging interface can form a segmented flexible bending limiting structure. When the cable 1 is dragged, swung or bent close to the ground, the concentrated bending force can be distributed between the multi-group segmented bending limiting guards 204, avoiding the problems of excessively small bending angle, localized force concentration and outer sheath cracking between the cable 1 and the rigid part of the interface.

[0023] Furthermore, wear-resistant ribs 5 are provided on the inner side of cable 1, tensile reinforcing cores 6 are provided on the inner side of wear-resistant ribs 5, and insulation layers 7 are provided on the inner side of tensile reinforcing cores 6. Conductive cores 8 are provided in the center of insulation layers 7. By providing wear-resistant ribs 5, when the outer side of cable 1 comes into contact with the ground or charging pile housing during dragging on the ground, placement around the pile, or vehicle charging, the wear-resistant ribs 5 can first bear the friction, reducing the direct wear of the outer sheath. By providing tensile reinforcing cores 6, cable 1 has better tensile bearing capacity when subjected to axial tension, reducing the probability of tension being directly transmitted to conductive cores 8. By providing insulation layers 7, conductive cores 8 maintain stable insulation protection during high-current charging, improving the safety of charging pile use.

[0024] Furthermore, the conical stress relief sleeve 201 is sleeved on the outer side of the end of the cable 1, and the end locking ring 202 is set at one end of the bearing sleeve 203. By setting the conical stress relief sleeve 201, the cable 1 forms a gradual support when transitioning from the flexible cable section to the rigid connection section at the interface end, avoiding stress concentration at the root of the interface due to repeated bending. By setting the end locking ring 202, the bearing sleeve 203 can be stably held on the outer side of the end of the cable 1, preventing the interface segment bending limit mechanism 2 from axially loosening during long-term bending and dragging, and improving the stability of the bending protection position.

[0025] Furthermore, multiple sets of segmented bending limit guards 204 are provided on the outside of the bearing sleeve 203. By setting multiple sets of segmented bending limit guards 204, the bending action of the cable 1 end can be divided into multiple small-angle bending units. Each set of segmented bending limit guards 204 only bears part of the sway angle, thereby avoiding fatigue damage to the cable 1 end caused by excessive bending at a single point. At the same time, the multiple sets of segmented bending limit guards 204 can form a joint-like buffer protection effect when the cable 1 bends, so that the cable 1 remains flexible without excessive bending.

[0026] Furthermore, an annular limiting groove 205 is formed on the outer surface of the segmented bending limit guard joint 204, and a flexible connecting rib 208 is set inside the annular limiting groove 205. Through the setting of the annular limiting groove 205, the flexible connecting rib 208 can be embedded on the outside of the segmented bending limit guard joint 204, and is not easy to shift or fall off when the cable 1 is dragged or bent. Through the setting of the flexible connecting rib 208, a continuous traction structure is formed between the multiple groups of segmented bending limit guard joints 204. When the cable 1 bends, it can limit the maximum opening distance between adjacent segmented bending limit guard joints 204, and assist the segmented bending limit guard joints 204 to return to the initial state after the external force is removed, thereby improving the fatigue resistance of the interface end.

[0027] Furthermore, the axial tensile stress relief mechanism 3 includes a tensile braided strip 301. One end of the tensile braided strip 301 is connected to an inner clamping pressure ring 302. An outer clamping pressure ring 303 is provided on the outer side of the tensile braided strip 301. An anchoring sleeve 304 is connected to one side of the outer clamping pressure ring 303. A sliding buffer sleeve 305 is sleeved on the outer side of the anchoring sleeve 304. A buffer spring 306 is sleeved on the outer side of the sliding buffer sleeve 305. A tension limiting step 307 is provided at one end of the sliding buffer sleeve 305. A terminal isolation seat 308 is connected to one end of the buffer spring 306. Through the setting of the axial tensile stress relief mechanism 3, the axial tensile force generated by the cable 1 when the charging gun is pulled, the vehicle is accidentally dragged, or the personnel move the cable 1 can be preferentially transmitted to the tensile braided strip 301. Then, it is released step by step through the clamping, anchoring, and elastic buffering structure, avoiding the instantaneous tensile force from directly acting on the conductive core 8, the interface welding point, or the terminal part, thereby improving the tensile reliability and service life of the charging cable.

[0028] Furthermore, the inner clamping pressure ring 302 and the outer clamping pressure ring 303 are mutually cooperated and disposed at the end of the tensile braided tape 301. The sliding buffer sleeve 305 is slidably sleeved on the outside of the anchor sleeve 304. The buffer spring 306 is located between the sliding buffer sleeve 305 and the tension limiting step 307. Through the setting of the inner clamping pressure ring 302 and the outer clamping pressure ring 303, the end of the tensile braided tape 301 can be clamped and positioned to prevent the tensile braided tape 301 from being pulled out from the connection end after being subjected to force. Through the setting of the sliding buffer sleeve 305 and the buffer spring 306, when the cable 1 is subjected to sudden tension, it can first produce a controlled slip, and then the buffer spring 306 absorbs the impact force and gradually resets, thereby converting the hard pull into an elastic buffering process and reducing the risk of damage to the interface end.

[0029] Furthermore, the connecting mechanism 4 includes a plug 401, one end of which is provided with an adapter cable sleeve 402, and one end of the adapter cable sleeve 402 is connected to a fixing block 403. A slot 404 is provided on one side of the fixing block 403, and an installation groove 405 is provided on the inner side of the fixing block 403. A return spring 406 is connected to the inner side of the installation groove 405, a guide rod 407 is provided on the inner side of the installation groove 405, and a sliding groove 408 is provided on the inner side of the installation groove 405. Through the setting of the connecting mechanism 4, the end of the cable 1 can be quickly plugged into and locked with the charging pile or the adapter structure. When it is necessary to replace, repair or disassemble the interface line segment, it is not necessary to completely disassemble the main body of the cable 1, which improves the convenience of maintenance. Through the cooperation of the slot 404, the installation groove 405, the return spring 406 and the guide rod 407, the plug 401 can be elastically limited after insertion, reducing the possibility of loosening due to vibration, dragging or repeated plugging and unplugging during the charging process.

[0030] Furthermore, one end of the plug 401 is connected to a tapered stress relief sleeve 201. Through the connection between the plug 401 and the tapered stress relief sleeve 201, the connecting mechanism 4 and the interface segment bending limiting mechanism 2 can form a continuous end protection structure. The plug 401 is responsible for plugging and locking, and the tapered stress relief sleeve 201 is responsible for bending transition, so that the end of the cable 1 has both quick-release connection and anti-bending protection effect, avoiding the problem that the interface only has mechanical connection and lacks flexible buffer protection.

[0031] Furthermore, a rotating groove 409 is provided on the outer side of the adapter cable sleeve 402. An arc-shaped slider 412 is slidably connected to the inner side of the rotating groove 409. A connecting rod 411 is connected to one side of the arc-shaped slider 412. A push plate 410 is connected to one end of the connecting rod 411. The push plate 410 slides inside the mounting groove 405 and is connected to the return spring 406 and the guide rod 407. The connecting rod 411 moves inside the sliding groove 408. A force-bearing ring 413 is connected above the arc-shaped slider 412. Through the design of the rotating groove 409 and the arc-shaped slider 412... The force ring 413 is positioned such that when it is rotated, it can drive the arc-shaped slider 412 to slide stably along the outside of the adapter cable sleeve 402. The rotational action is converted into a linear pushing action of the push plate 410 through the connecting rod 411. With the push plate 410, the return spring 406 and the guide rod 407, the plug 401 can be pressed and locked after being inserted into the slot 404. When disassembling, it can be reset by the return spring 406, realizing a quick switch between locking and releasing, improving the stability and maintainability of the connection at the end of the charging pile cable 1.

[0032] Working principle: Firstly, when this type of flexible, bend-resistant cable for charging piles is put into use, cable 1 serves as the conductive foundation between the charging pile and the vehicle charging interface. The conductive core 8 carries the charging current, the insulation layer 7 provides insulation protection for the conductive core 8, the tensile reinforcement core 6 improves the overall tensile strength of cable 1, and the wear-resistant ribs 5 provide wear protection when cable 1 moves, is dragged, or comes into contact with the ground. When cable 1 bends near the adapter sleeve 402, the tapered stress relief sleeve 201 provides gradual support to the end of cable 1, preventing abrupt bending when the flexible cable section transitions to the rigid connection section of the interface. The end locking ring 202 provides support to the bearing sleeve 203. One end is fixed, and the multi-section bending limit guard joint 204 sequentially receives the bending action on the outside of the bearing sleeve 203. The bending limit gap 207 between adjacent section bending limit guard joints 204 limits the sway amplitude between individual sections. The elastic return rib 206 and the flexible connecting rib 208 form an overall traction on the multi-section bending limit guard joint 204 in the annular limit groove 205. When the external force is removed, it can drive the bent part to gradually return to the correct position, avoiding the interface end from remaining in an excessively bent state for a long time. When the charging gun is dragged or the cable 1 is subjected to axial tension, the tensile braided strip 301 first bears the tension. The inner clamping pressure ring 302 and the outer clamping pressure ring 303 clamp the end of the tensile braided strip 301, so that... The tension is transmitted to the anchor sleeve 304 and the sliding buffer sleeve 305. The sliding buffer sleeve 305 slides in a controlled manner along the anchor sleeve 304 and compresses the buffer spring 306. The buffer spring 306 absorbs the instantaneous tension and then pushes the sliding buffer sleeve 305 back to its original position, thereby reducing the tension acting directly on the conductive core 8 and the end interface position. When it is necessary to connect the adapter cable sleeve 402, the plug 401 is inserted into the slot 404 on one side of the fixing block 403, and then the force ring 413 is pushed to rotate along the outside of the adapter cable sleeve 402. The force ring 413 drives the arc-shaped slider 412 to slide in the rotating groove 409. The arc-shaped slider 412 drives the push plate 410 along the mounting groove 409 through the connecting rod 411. 05 and slide 408 move, push plate 410 compresses return spring 406 under the guidance of guide rod 407 and forms top pressure limit on plug 401, so that plug 401 is kept stably locked in slot 404, preventing loosening due to dragging, vibration or repeated plugging and unplugging during use of charging pile. When disassembly or maintenance is required, push force ring 413 in the opposite direction, arc slider 412 moves in the opposite direction and drives connecting rod 411 and push plate 410 to retract. Return spring 406 releases elasticity to make push plate 410 retract and reset along guide rod 407, release top pressure limit on plug 401, and then plug 401 can be pulled out from slot 404 to complete quick disassembly of adapter end.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bend-resistant flexible cable for charging piles, comprising a cable (1), characterized in that: One end of the cable (1) is provided with an interface segment bending limit mechanism (2), one end of the cable (1) is provided with an axial tensile stress relief mechanism (3), and one end of the axial tensile stress relief mechanism (3) is provided with a connecting mechanism (4). The interface segment bending limiting mechanism (2) includes a conical stress relief sleeve (201), one end of which is connected to an end locking ring (202). A bearing sleeve (203) is provided on the inner side of the end locking ring (202), and a segmented bending limiting guard (204) is sleeved on the outer side of the bearing sleeve (203). An annular limiting groove (205) is provided on the outer side of the segmented bending limiting guard (204) in a circular shape with equal spacing. An elastic return rib (206) is connected between the segmented bending limiting guards (204), and a bending limiting gap (207) is provided between the segmented bending limiting guards (204). A flexible connecting rib (208) is connected to one end of the elastic return rib (206).

2. The bend-resistant flexible cable for charging piles according to claim 1, characterized in that: The cable (1) has wear-resistant ribs (5) on its inner side, tensile reinforcement cores (6) on its inner side, insulation layers (7) on its inner side, and conductive wire cores (8) at the center of the insulation layers (7).

3. The bend-resistant flexible cable for charging piles according to claim 1, characterized in that: The conical stress relief sleeve (201) is sleeved on the outside of the end of the cable (1), and the end locking ring (202) is disposed at one end of the bearing sleeve (203).

4. The bend-resistant flexible cable for charging piles according to claim 3, characterized in that: The segmented bending limit guard (204) is provided in multiple sets on the outside of the bearing sleeve (203).

5. A bend-resistant flexible cable for charging piles according to claim 1, characterized in that: The annular limiting groove (205) is formed on the outer surface of the segmented bending protection section (204), and the flexible connecting rib (208) is provided on the inner side of the annular limiting groove (205).

6. A bend-resistant flexible cable for charging piles according to claim 1, characterized in that: The axial tensile stress relief mechanism (3) includes a tensile braided belt (301), one end of which is connected to an inner clamping pressure ring (302), and an outer clamping pressure ring (303) is provided on the outer side of the tensile braided belt (301). An anchoring sleeve (304) is connected to one side of the outer clamping pressure ring (303). A sliding buffer sleeve (305) is provided on the outer side of the anchoring sleeve (304), and a buffer spring (306) is provided on the outer side of the sliding buffer sleeve (305). A tension limiting step (307) is provided at one end of the sliding buffer sleeve (305), and a terminal isolation seat (308) is connected to one end of the buffer spring (306).

7. A bend-resistant flexible cable for charging piles according to claim 6, characterized in that: The inner clamping pressure ring (302) and the outer clamping pressure ring (303) are respectively arranged at the end of the tensile braided strip (301), the sliding buffer sleeve (305) is slidably sleeved on the outside of the anchor sleeve (304), and the buffer spring (306) is located between the sliding buffer sleeve (305) and the tension limiting step (307).

8. A bend-resistant flexible cable for charging piles according to claim 7, characterized in that: The connecting mechanism (4) includes a plug (401), one end of which is provided with an adapter cable sleeve (402), one end of which is connected to a fixing block (403), a slot (404) is provided on one side of the fixing block (403), an installation groove (405) is provided on the inner side of the fixing block (403), a return spring (406) is connected to the inner side of the installation groove (405), a guide rod (407) is provided on the inner side of the installation groove (405), and a sliding groove (408) is provided on the inner side of the installation groove (405).

9. A bend-resistant flexible cable for charging piles according to claim 8, characterized in that: One end of the insert (401) is connected to a tapered stress relief sleeve (201).

10. A bend-resistant flexible cable for charging piles according to claim 8, characterized in that: The outer side of the adapter cable sleeve (402) is provided with a rotating groove (409). An arc-shaped slider (412) is slidably connected to the inner side of the rotating groove (409). A connecting rod (411) is connected to one side of the arc-shaped slider (412). A push plate (410) is connected to one end of the connecting rod (411). The push plate (410) slides inside the mounting groove (405) and is connected to a return spring (406) and a guide rod (407). The connecting rod (411) moves inside the sliding groove (408). A force-bearing ring (413) is connected above the arc-shaped slider (412).

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