Power maintenance tool cart capable of live cable rewinding

Abstract

This utility model discloses a power maintenance tool cart capable of live-line cable retraction and deployment, comprising: a vehicle frame and a power supply panel; the power supply panel includes a cable retraction and deployment roller, a rotating electrical connection structure, and a socket panel; a retractable power supply cable is wound on the cable retraction and deployment roller; the cable retraction and deployment roller is pivotally connected to the vehicle frame; the socket panel is electrically connected to a power input line, and the socket panel is mounted on and supported by the vehicle frame; the power input line is electrically connected to the retractable power supply cable through the rotating electrical connection structure, allowing the cable retraction and deployment roller to rotate relative to the power input line. The purpose of this utility model is to provide a power maintenance tool cart capable of live-line cable retraction and deployment, enabling the retraction and deployment of power supply cables without interrupting power, avoiding cable tangling and twisting problems.

Description

Technical Field

[0001] This utility model relates to the technical field of power maintenance tool vehicles, and in particular to a power maintenance tool vehicle capable of live cable rewinding and unwinding. Background Technology

[0002] In power maintenance work, traditional power supply methods have a significant technical bottleneck: adjusting the length of the retractable power cable requires power disconnection. Existing maintenance tools mostly use fixed cable reels or ordinary cable trays, with a rigid connection between the retractable power cable and the power supply end. This forces workers to frequently disconnect the power when moving or retracting the cable. This power disconnection not only severely impacts maintenance efficiency but also forces equipment to shut down in live-line work situations, causing unnecessary power outages. Especially during long-distance movement or high-altitude operations, workers are often forced to interrupt their work because they cannot adjust the cable length in real time, increasing operational complexity and creating potential safety hazards.

[0003] While most electrical maintenance carts on the market have cable retraction and deployment capabilities, they generally suffer from technical flaws that lead to cable tangling and twisting. Because traditional carts use a fixed connection between the socket panel and the cable reel, the power cable twists and turns as the reel rotates during retraction, causing repeated twisting that can result in cable detachment and insulation damage. This is particularly problematic in complex scenarios such as high-altitude operations, where workers must control the cart's movement while simultaneously preventing excessive cable twisting, significantly increasing operational difficulty and safety risks. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a power maintenance tool cart that can retract and extend power cables while the power is on, so as to realize the retraction and extension of power supply cables without interrupting the power supply and avoid the problems of cable tangling and twisting.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A power maintenance tool cart capable of live cable retraction and deployment includes: a vehicle frame and a power supply panel; the power supply panel includes a cable retraction roller, a rotating electrical connection structure, and a socket panel; a retractable power supply cable is wound on the cable retraction roller; the cable retraction roller is pivotally connected to the vehicle frame; the socket panel is electrically connected to a power input line, and the socket panel is mounted on and supported by the vehicle frame; the power input line is electrically connected to the retractable power supply cable through the rotating electrical connection structure, so that the cable retraction roller can rotate relative to the power input line.

[0007] Furthermore, the rotating electrical connection structure is a rotating electrical connector, wherein the conductive ring of the rotating electrical connector is sequentially electrically connected to the retractable power supply line along the current direction, and the brush of the rotating electrical connector is sequentially electrically connected to the power input line along the current direction.

[0008] Furthermore, the outer cylinder is sleeved around the take-up and release roller, the outer cylinder is connected to and supported by the take-up and release roller, and a cable storage cavity is formed between the outer cylinder and the take-up and release roller at intervals, the cable storage cavity being used to store the retractable power supply cable.

[0009] Furthermore, the take-up and unwind roller has an electrical connection mounting cavity inside, and the rotating electrical connection structure is housed in the electrical connection mounting cavity; the outer wall of the take-up and unwind roller has a wire channel that extends through the mounting cavity, and the retractable power supply wire passes through the wire channel into the mounting cavity and is electrically connected to the conductive ring.

[0010] Furthermore, the vehicle frame includes a protective shell, the outer cylinder is housed within the protective shell, the protective shell is provided with a cable retraction guide, and the retractable power supply cable is movably passed through the cable retraction guide.

[0011] Furthermore, the vehicle frame is equipped with a storage compartment.

[0012] Furthermore, the take-up and unwind roller is equipped with a return spring, one end of which is connected to the vehicle frame and the other end of which is connected to the take-up and unwind roller. The return spring has a tendency to drive the take-up and unwind roller to wind the retractable power supply line.

[0013] Furthermore, the vehicle frame is also equipped with casters; the width of the caster wheel is greater than the width of the hub, and the wheel surface is provided with anti-slip texture.

[0014] Furthermore, the vehicle frame is equipped with a foldable platform.

[0015] Furthermore, the vehicle frame is also provided with a cable bracket, which has multiple cable positioning parts for positioning the conductive wires that output power on the socket panel; the socket panel is provided with a leakage current protector; the retractable power supply cable includes a first wire segment, a quick-connect connector and a second wire segment connected in sequence.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. A rotating electrical connection structure, based on the take-up and release rollers pivotally connected to the vehicle frame, provides support for the free take-up and release of the power supply cable and establishes a stable basis for rotational movement. The rotating electrical connection structure is positioned at a critical location between the take-up and release rollers and the power input line (the power input line is fixedly connected to a brush in this invention, meaning the conductive ring rotates synchronously with the take-up and release rollers, achieving dynamic conductivity through sliding contact with the brush), ensuring stable power transmission at any rotation angle. The static arrangement of the socket panel, fixedly mounted to and supported by the vehicle frame, forms a dynamic-static separation structure with the rotating take-up and release rollers, effectively blocking the transmission of rotational torque to the power supply end. In summary, this structure forms a complete conductive path from the external power source, the retractable power supply cable, the rotating electrical connection structure, the power input line, to the socket panel, achieving decoupling of power transmission and mechanical movement. This circuit system ensures continuous power supply while solving the problems of circuit interruption and entanglement caused by cable rotation in traditional solutions.

[0018] 2. The cable storage cavity structure formed by the outer cylinder and the take-up / delivery rollers enables the orderly storage and protection of power cables. The electrical connection mounting cavity and wire channel inside the take-up / delivery rollers ensure a reliable connection between the rotating electrical connection structure and the power cables, while maintaining a compact overall structure. These improvements enable the tool cart to safely and smoothly take up and deliver power cables during live-line operations.

[0019] 3. The protective outer shell effectively protects the internal cable structure and ensures smooth cable deployment and retraction; the storage box design facilitates the storage and management of tools and accessories; the reset spring structure enables automatic cable retraction, improving operational convenience; wide-faced anti-slip casters enhance the stability and terrain adaptability of the tool cart; the foldable platform provides flexible workspace; and cable supports and leakage protection ensure orderly cable arrangement and electrical safety. These improvements collectively enhance the practicality, safety, and ease of operation of the power maintenance tool cart. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of the power maintenance tool cart capable of live cable retraction and extension according to this utility model.

[0021] Figure 2 for Figure 1 A schematic diagram of the rotating electrical connection structure is shown.

[0022] Figure 3 for Figure 2 A magnified view of a portion at point A shown.

[0023] In the diagram: 1. Vehicle frame; 2. Power supply panel; 3. Cable retraction roller; 4. Retractable power supply cable; 5. Rotating electrical connection structure; 501. Conductive ring; 502. Brush; 6. Socket panel; 7. Power input line; 8. Cable storage cavity; 9. Electrical connection mounting cavity; 10. Wire channel; 11. Protective housing; 12. Cable retraction guide port; 13. Storage box; 14. Reset coil spring; 15. Casters; 16. Foldable platform; 17. Cable bracket; 18. Cable positioning part; 19. Residual current device; 20. Quick connector; 21. Outer cylinder. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0025] It should be noted that when an element is described as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is described as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] See Figure 1 , Figure 2 and Figure 3 The specific implementation of a preferred embodiment of this utility model is as follows:

[0028] A power maintenance tool cart capable of live cable retraction and deployment includes: a vehicle frame 1 and a power supply panel 2; the power supply panel 2 includes a cable retraction roller 3, a rotating electrical connection structure 5, and a socket panel 6; a retractable power supply cable 4 is wound on the cable retraction roller 3; the cable retraction roller 3 is pivotally connected to the vehicle frame 1; the socket panel 6 is electrically connected to a power input line 7, and the socket panel 6 is mounted on and supported by the vehicle frame 1; the power input line 7 is electrically connected to the retractable power supply cable 4 through the rotating electrical connection structure 5, so that the cable retraction roller 3 can rotate relative to the power input line 7.

[0029] In this embodiment, the tool cart mainly consists of a frame 1 and a power supply panel 2 forming an overall support structure. The power supply panel 2 adopts a three-layer layout: the take-up and release roller 3, as the rotating main body, is pivotally connected to the frame 1, with a retractable power supply cable 4 wrapped around its outer periphery; the rotating electrical connection structure 5 is built into the connection between the roller and the power input line 7; and the socket panel 6 is fixedly installed on the frame 1, forming a stable power supply interface. This layout achieves physical isolation between rotating and fixed components. This solution, through the core component of the rotating electrical connection structure 5, resolves the contradiction between cable rotation and power transmission during live-line work, allowing the power supply cable to be retracted and released without interrupting power, while also preventing cable twisting.

[0030] During cable winding and unwinding operations, the operator pulls the retractable power cable 4, causing the winding and unwinding roller 3, which is wound around it, to rotate freely around its pivot. At this time, the conductive structure of the rotating electrical connection structure 5 (such as the conductive ring 501) rotates synchronously with the winding and unwinding roller 3, while the correspondingly configured brush 502 remains stationary, continuously transmitting electrical energy through sliding contact. This dynamic connection method ensures that electrical energy can be transmitted from the fixed power input line 7 to the moving power cable via the rotating electrical connection structure 5 at any rotation angle.

[0031] It is understandable that the rotating electrical connection structure 5, which is pivotally connected to the vehicle frame 1 by the take-up / delivery roller 3, provides support for the free take-up and delivery of the power supply cable and achieves a stable rotational motion foundation. The rotating electrical connection structure 5 is positioned at a key location between the take-up / delivery roller 3 and the power input line 7. Its brush 502 is fixedly connected to the power input line 7, and the conductive ring 501 rotates synchronously with the take-up / delivery roller 3, achieving dynamic conductivity through sliding contact to ensure stable power transmission at any rotation angle. The socket panel 6, fixedly installed on and supported by the vehicle frame 1, forms a dynamic-static separation structure with the rotating take-up / delivery roller 3, effectively blocking the transmission of rotational torque to the power supply end. Through the core pivotal role of the rotating electrical connection structure 5, safe and smooth take-up and delivery of the power supply cable is achieved without power interruption, solving the problems of tangling and twisting caused by cable rotation in traditional maintenance operations, thus forming a complete conductive path from the external power source, the retractable power supply cable 4, the rotating electrical connection structure 5, the power input line 7, to the socket panel 6.

[0032] In addition, the rotating electrical connection structure 5 can be a conductive slip ring (brush slip ring), a fiber optic rotary connector, wireless power transmission, or a magnetohydrodynamic electrical connection. A handle coaxially connected to the take-up / delivery roller 3 can also be provided, allowing the operator to rotate the take-up / delivery roller 3 by pushing the handle or performing other movements, thereby facilitating the smooth take-up and delivery of the retractable power cable 4.

[0033] In practice, the power input line 7 is passed through the vehicle frame 1 and connected to the brush 502 end of the rotating electrical connection structure 5; one end of the power supply cable is fixed to the roller and passes through the conductive ring 501 of the rotating electrical connection structure 5, while the other end extends as a free end. During operation, pulling the power supply cable drives the roller to rotate, and the rotating electrical connection structure 5 automatically maintains the circuit conduction, so that the socket panel 6 always remains in a fixed power supply state, realizing live wire winding and unwinding operation.

[0034] Preferably, the rotary electrical connection structure 5 is a rotary electrical connector. The conductive ring 501 of the rotary electrical connector is sequentially electrically connected to the retractable power supply line 4 along the current direction, and the brush 502 of the rotary electrical connector is sequentially electrically connected to the power input line 7 along the current direction. This solution uses the conductive ring 501 and brush 502 mechanism as the core of the rotary conductivity, and solves the problems of tangling and power failure when retracting and extending the energized line through a sliding contact design.

[0035] The rotating electrical connection structure 5 of this utility model adopts a contact design of conductive ring 501 and brush 502. The conductive ring 501 is coaxially fixed to the take-up / untake-off roller 3 and rotates synchronously with it, forming a dynamic conductive component. The brush 502 assembly is fixed to the vehicle frame 1 via an insulating bracket and connected to the power input line 7, serving as a static conductive interface. The conductive ring 501 has multiple concentric annular copper rails, and the corresponding brush 502 uses an elastic phosphor bronze sheet structure to ensure reliable contact of each circuit channel. This structure, through the cooperation of the rotating contact surfaces, achieves the electrical connection between the dynamic rotating component and the static power supply system.

[0036] During operation, the rotational motion of the take-up and undo roller 3 achieves dynamic conductivity through the sliding contact of the conductive ring 501 and the brush 502: as the conductive ring 501 rotates with the roller, its annular conductive track maintains continuous contact with the fixed brush 502, conducting electricity to the brush 502. The brush 502 is connected to the power input line 7, allowing electrical energy to flow from the external power source, through the retractable power supply line 4, the conductive ring 501, the brush 502, the power input line 7, and finally to the socket panel 6. This design achieves uninterrupted power supply under multi-angle, unlimited rotation conditions, while eliminating cable twisting and deformation.

[0037] The take-up and unwind roller 3 is sleeved on the outer cylinder 21. The outer cylinder 21 is connected to and supported by the take-up and unwind roller 3. The outer cylinder 21 and the take-up and unwind roller 3 are spaced apart to form a cable storage cavity 8, which is used to store the retractable power supply cable 4.

[0038] In this design, the take-up and untake-down roller 3 and the outer cylinder 21 form a double-layer sleeve structure. The outer cylinder 21 is coaxially spaced from the roller through radial supports, forming a ring-shaped cable storage cavity 8. This cavity is evenly distributed circumferentially, providing an orderly winding space for the power supply cable, while the outer cylinder 21 forms a protective barrier for the cable. The double-layer sleeve structure achieves directional cable storage through physical isolation, protecting the cable from external damage and avoiding tangled or twisted wires during the winding process.

[0039] During cable winding and unwinding, the winding and unwinding roller 3 drives the outer cylinder 21 to rotate synchronously, allowing the power supply cable 4 to be wound axially in layers within the cable storage cavity 8. The rigid structure of the outer cylinder 21 constrains the cable's movement trajectory, preventing radial movement and ensuring that the cable remains flat and aligned throughout the winding and unwinding process.

[0040] The take-up and untake-down roller 3 has an internal electrical connection mounting cavity 9, in which the rotating electrical connection structure 5 is housed. The outer wall of the take-up and untake-down roller 3 has a wire channel 10 extending into the mounting cavity, allowing the power supply wire 4 to be taken up and untaken, passing through the wire channel 10 into the mounting cavity and electrically connected to the conductive ring 501. The built-in electrical connection cavity protects the rotating conductive system, and the wire channel 10 design ensures the shortest power transmission path, improving reliability and optimizing space utilization, thus solving the problem of exposed connections being easily damaged.

[0041] It is understandable that the cable storage cavity 8 structure formed by the outer cylinder 21 and the take-up / release roller 3 enables the orderly storage and protection of the power supply cable; the electrical connection mounting cavity 9 and wire channel 10 set inside the take-up / release roller 3 ensure a reliable connection between the rotating electrical connection structure 5 and the power supply cable, while maintaining a compact overall structure. These improvements enable the tool cart to safely and smoothly take up and release power supply cables when working with electricity.

[0042] The take-up and untake-down roller 3 adopts a hollow cavity design, with a dedicated electrical connection mounting cavity 9 inside, into which the rotating electrical connection structure 5 is integrally embedded. A radial conductor channel 10 is opened on the outer wall of the take-up and untake-down roller 3, allowing the retractable power supply wire 4 to pass directly from the winding area into the inner cavity and connect to the conductive ring 501.

[0043] During cable winding and unwinding, the conductive ring 501, which rotates with the winding and unwinding roller 3, remains fixedly connected to the external cable through the conductor channel 10, while dynamic and static contact is achieved inside the electrical connection structure. The tension of the retractable power supply cable 4 is evenly transmitted through the channel wall, avoiding stress concentration at the connection end.

[0044] The vehicle frame 1 includes a protective shell 11, and an outer cylinder 21 is housed inside the protective shell 11. The protective shell 11 is provided with a cable retraction guide 12, through which the power supply line 4 can be retracted and movably passed.

[0045] The vehicle frame 1 includes a protective shell 11, with an outer cylinder 21 housed within the protective shell 11. The protective shell 11 is provided with a cable retraction guide 12, through which the power supply cable 4 can be retracted and movably passed. This structure achieves mechanical protection, environmental sealing, and thermal management during dynamic operations, significantly improving operational reliability in harsh environments.

[0046] The protective shell 11 completely encloses the outer cylinder 21 to form a sealed cavity, and its cable take-up and untake-down guide port 12 is edged with wear-resistant material. A certain buffer gap is provided between the outer cylinder 21 and the protective shell 11, and the center line of the guide port is arranged at a certain angle to the tangent of the take-up and untake-down roller 3.

[0047] During cable extension and retraction, the wear-resistant edging of the guide port guides the cable to extend and retract smoothly along a set angle, while the protective shell 11 isolates external splashes. The buffer gap forms a convection heat dissipation channel to ensure that the frictional heat of the cable dissipates in a timely manner.

[0048] The vehicle frame 1 is equipped with a storage box 13. This solution provides storage space for testing tools, enabling the transportation and rapid retrieval of maintenance equipment.

[0049] The storage box 13 is formed by bending sheet metal and welded as a whole to the side beam of the vehicle frame 1. The inside of the box is equipped with layered partitions and a waterproof flip-top door structure at the opening end, forming an integrated load-bearing structure with the vehicle frame 1.

[0050] The take-up / release roller 3 is equipped with a return spring 14. One end of the return spring 14 is connected to the vehicle frame 1, and the other end is connected to the take-up / release roller 3. The return spring 14 has a tendency to drive the take-up / release roller 3 to wind the retractable power cable 4. This solution realizes the automatic cable retrieval function, ensuring that the cable is neatly stored after operation.

[0051] The reset coil spring 14 is made of spring steel. Its inner end is fixed to the rotating shaft of the take-up and unwinding roller 3 through a slot, and its outer end is hooked on the spring seat of the car body frame 1.

[0052] When the power supply line is pulled out, the coil spring stores energy and deforms; when the cable is released, the coil spring releases torque to drive the take-up and unwind roller 3 to automatically rewind, and during the rewinding, it drives the take-up and unwind roller 3 to rotate and retract the retractable power supply line 4.

[0053] The vehicle frame 1 is also equipped with casters 15; the width of the caster 15 is greater than the width of the wheel hub, and the caster surface is provided with anti-slip texture. This solution improves the vehicle's passability and stability on wet, uneven ground, and the anti-slip texture design effectively reduces the slippage rate.

[0054] The 15 swivel wheels have a wider tread surface than ordinary flatbed truck wheels, preventing the wheel hub from sinking when passing through holes in gratings, cable covers, etc. The 15 swivel wheels feature a nylon-coated wheel structure, with a tread width designed to be 1.5 times the hub width. The tread surface is evenly distributed with V-shaped anti-slip ripples of a certain depth, and is connected to the vehicle frame 1 via flange bearings. During movement, the wider tread surface increases the ground contact area, and the anti-slip ripples engage with the ground; the swivel structure allows for flexible steering at multiple angles.

[0055] The vehicle frame 1 is equipped with a foldable platform 16.

[0056] The foldable platform 16 uses a hinge connection method. The main body of the platform is connected to the side of the vehicle frame 1 through two sets of parallel hinges. When folded, the platform can be rotated 90° to fit against the side of the vehicle frame 1. When unfolded, it is locked by a pin to form a horizontal working surface. This solution provides a temporary working surface while taking into account the compactness of the equipment, enabling the rapid deployment and storage of the work platform and improving the adaptability of working in confined spaces.

[0057] When in operation, pull out the pin to unfold the platform to a horizontal position, and the pin will automatically spring into the positioning hole to lock; when storing, lift the pin to flip and fold it, and the thickness of the platform after folding reduces the space occupied.

[0058] The vehicle frame 1 is also equipped with a cable bracket 17, which has multiple cable positioning parts 18. The cable positioning parts 18 are used to position the conductive wires for outputting electrical power on the socket panel 6. The socket panel 6 is equipped with a leakage current protector 19. The retractable power cable 4 includes a first wire segment, a quick-connect connector 20, and a second wire segment connected in sequence. This solution achieves orderly cable management, electrical safety protection, and quick wiring functions, improving the safety and convenience of equipment use.

[0059] The cable bracket 17 uses a rotatable U-shaped clamp structure as the cable positioning part 18. The cable bracket 17 body is fixed to the side of the vehicle frame 1 by bolts (it can also be stored in a retractable way, such as hinged cable bracket 17); the leakage current protector 19 is integrated inside the socket panel 6 and uses an electromagnetic tripping mechanism; the main function of the quick connector 20 is to realize the quick plugging and unplugging connection of the power supply cable, which not only ensures the convenience of operation when working with electricity, but also ensures the reliability and safety of the electrical connection.

[0060] In summary, this utility model achieves a functional breakthrough in the power maintenance tool cart capable of live cable winding and unwinding through innovative design: based on the rotating electrical connection structure 5 and the dynamic-static separation conductive system, the winding and unwinding roller 3 can rotate freely in a live state, fundamentally solving the problems of cable entanglement and power interruption; combined with the double-layer sleeve storage structure and the built-in electrical connection cavity, it ensures both orderly cable winding and unwinding and optimizes the spatial layout; supplemented by the protective shell 11, automatic rewinding mechanism and anti-slip movement system, it comprehensively improves the reliability of the equipment; at the same time, it integrates storage management, folding platform and safety protection devices to form a comprehensive maintenance platform integrating power supply, storage, transportation and operation, significantly improving the efficiency and safety level of power maintenance operations.

[0061] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0062] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0063] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A power service truck with live line spooling and unspooling, characterized in that, include: Vehicle body frame (1); The power supply panel (2) includes a take-up and release roller (3), a rotating electrical connection structure (5), and a socket panel (6). A retractable power supply line (4) is wound around the take-up and release roller (3). The take-up and release roller (3) is pivotally connected to the vehicle frame (1). The socket panel (6) is electrically connected to a power input line (7). The socket panel (6) is installed on the vehicle frame (1) and supported by the vehicle frame (1). The power input line (7) is electrically connected to the retractable power supply line (4) through the rotating electrical connection structure (5) so that the take-up and release roller (3) can rotate relative to the power input line (7).

2. The live line spoolable service truck of claim 1, wherein, The rotating electrical connection structure (5) is a rotating electrical connector. The conductive ring (501) of the rotating electrical connector is sequentially electrically connected to the retractable power supply line (4) along the current direction. The brush (502) of the rotating electrical connector is sequentially electrically connected to the power input line (7) along the current direction.

3. The live line spoolable service truck of claim 1, wherein, The outer cylinder (21) is sleeved around the take-up and release roller (3). The outer cylinder (21) is connected to the take-up and release roller (3) and supported by the take-up and release roller (3). The outer cylinder (21) and the take-up and release roller (3) are spaced apart to form a cable storage cavity (8). The cable storage cavity (8) is used to store the retractable power supply cable (4).

4. The power maintenance tool cart capable of live cable rewinding and unwinding according to claim 3, characterized in that, The take-up and undo roller (3) has an electrical connection mounting cavity (9) inside, and the rotating electrical connection structure (5) is housed in the electrical connection mounting cavity (9); the outer wall of the take-up and undo roller (3) is provided with a wire channel (10) that extends into the mounting cavity, and the retractable power supply wire (4) passes through the wire channel (10) into the mounting cavity and is connected to the rotating electrical connection structure (5).

5. The live line spooling service truck of claim 3, wherein, The vehicle frame (1) includes a protective shell (11), the outer cylinder (21) is housed in the protective shell (11), the protective shell (11) is provided with a cable retraction guide (12), and the retractable power supply line (4) is movably passed through the cable retraction guide (12).

6. The live line spooling service truck of claim 1, wherein, The vehicle frame (1) is equipped with a storage box (13).

7. The live line spooling service truck of claim 1, wherein, The take-up and unwind roller (3) is provided with a reset spring (14). One end of the reset spring (14) is connected to the vehicle frame (1), and the other end of the reset spring (14) is connected to the take-up and unwind roller (3). The reset spring (14) has a tendency to drive the take-up and unwind roller (3) to wind the retractable power supply line (4).

8. The live line spooling service truck of claim 1, wherein, The vehicle frame (1) is also provided with casters (15); the width of the caster (15) is greater than the width of the hub, and the caster surface is provided with anti-slip texture.

9. The chargeable spooling service truck of claim 1, wherein, The vehicle frame (1) is equipped with a foldable platform (16).

10. The live line spooling service truck of claim 1, wherein, The vehicle frame (1) is also provided with a cable bracket (17), the cable bracket (17) is provided with a plurality of cable positioning parts (18), the cable positioning parts (18) are used to position the conductive wires for outputting electrical energy on the socket panel (6); the socket panel (6) is provided with a leakage current protector (19); the retractable power supply cable (4) includes a first wire segment, a quick connector (20) and a second wire segment connected in sequence.

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