An overhauling device for high-altitude power system

Abstract

This invention relates to the field of power system maintenance equipment technology, and discloses a maintenance device for high-altitude power systems. The device includes a vehicle body, a lifting assembly mounted on the vehicle body, and a platform assembly mounted on the lifting assembly. The lifting assembly can drive the platform assembly to move up and down on the vehicle body. Each platform assembly has extension plates around its perimeter, and each extension plate is rotatably connected to the platform assembly via a connecting assembly. The rotation of the extension plates on the platform assembly expands its area. By providing extension plates around the platform assembly and rotatably connecting them via connecting assemblies, this invention allows the extension plates to be unfolded to expand the platform assembly's area during subsequent maintenance of high-altitude power system equipment. This facilitates the standing and movement of maintenance personnel and the performance of maintenance work, while also providing maximum coverage of the power equipment. This has the advantages of improving maintenance efficiency and shortening maintenance time.

Description

Technical Field

[0001] This invention relates to a maintenance device for high-altitude power systems, belonging to the technical field of power system maintenance devices. Background Technology

[0002] In power systems, power equipment such as transmission lines and transformers are usually erected at high altitudes. Therefore, when it is necessary to inspect and maintain high-altitude power system equipment, it is necessary to climb up the power poles or towers to inspect and maintain the high-altitude equipment. However, inspecting equipment at high altitudes requires a lot of physical strength, and maintenance personnel also expend a great deal of physical strength when climbing power poles or towers. This will greatly hinder the maintenance work and prolong the maintenance time.

[0003] To save the physical strength of maintenance personnel and improve the convenience and operability of maintenance operations, the prior art, Chinese patent application number CN201610476040.2, discloses a power maintenance lifting platform. Through the setting of structures such as inner shear frame, outer shear frame, hydraulic rod, and work platform, maintenance personnel can stand on the work platform and adjust the horizontal height of the work platform by controlling the operation of the hydraulic rod to raise it. The raised work platform allows maintenance personnel standing on the work platform to perform the required high-altitude maintenance work, so that maintenance personnel do not need to climb, thereby greatly reducing the labor intensity of maintenance personnel.

[0004] However, the above-mentioned lifting platforms still have the following problems in actual use: The work platform of the aforementioned lifting platform has a limited area. When multiple people are needed to carry out maintenance work, the platform becomes crowded when multiple people stand on it, making it difficult to turn around, move, and carry out maintenance work, which affects maintenance efficiency. At the same time, some power system equipment is large and the area of ​​the lifting platform cannot cover the power equipment. This means that the maintenance process needs to be carried out in sections. When switching between sections, the lifting platform needs to be raised, lowered, and moved frequently, which greatly prolongs the maintenance time. Summary of the Invention

[0005] In order to solve the above-mentioned problems existing in the prior art, the present invention provides a maintenance device for high-altitude power systems.

[0006] The technical solution of the present invention is as follows: A maintenance device for high-altitude power systems includes a vehicle body, a lifting assembly mounted on the vehicle body, and a platform assembly mounted on the lifting assembly. The lifting assembly can drive the platform assembly to move up and down on the vehicle body. Each platform assembly is provided with an extension plate around its perimeter. Each extension plate is rotatably connected to the platform assembly via a connecting assembly. The extension plate can expand the area of ​​the platform assembly by rotating on the platform assembly.

[0007] Furthermore, the platform component includes a fixed plate, which is disposed on the lifting component. A support plate is disposed above the fixed plate, and extension plates are arranged around the support plate. The connecting component includes a rotating shaft and a connecting sleeve. The connecting sleeve is disposed on the periphery of the support plate. The rotating shaft is arranged in an L-shape and is disposed on each extension plate. One end of the rotating shaft is fixedly connected to the extension plate, and the other end is rotatably connected to the connecting sleeve at the corresponding position. The extension plate rotates with the support plate under the action of the rotating shaft and the connecting sleeve.

[0008] Furthermore, the connecting assembly also includes a first link and a second link, one end of the first link is hinged to the fixed plate, one end of the second link is hinged to the extension plate, and the other ends of the first link and the other ends of the second link are connected together by an adjusting rod.

[0009] Furthermore, a lifting member is also provided on the bottom surface of the fixed plate. The movable part of the lifting member passes through the fixed plate and is fixedly connected to the support plate. The lifting member can drive the support plate to move up and down.

[0010] Furthermore, the adjusting rod has symmetrically arranged bidirectional threads on its rod wall, and the ends of the first and second connecting rods close to the adjusting rod side are both provided with threaded holes adapted to the bidirectional threads. The adjusting rod is threadedly connected to the first and second connecting rods by connecting its two ends to the threaded holes at corresponding positions.

[0011] Furthermore, a guide rod is provided on the top surface of the fixing plate. The guide rod is movably installed through the support plate, and an anti-detachment block is provided at the top end of the guide rod. The diameter of the anti-detachment block is larger than the diameter of the guide rod.

[0012] Furthermore, each of the aforementioned expansion plates is fixedly provided with a plug-in sleeve, and a guardrail is inserted inside the plug-in sleeve.

[0013] Furthermore, the vehicle body is also provided with support legs around its perimeter for supporting the vehicle body.

[0014] Furthermore, the support leg includes a fixed frame mounted on the vehicle body, one end of a plug rod is mounted on the fixed frame, one end of a support rod is mounted on the other end of the plug rod, a lifting rod is threaded onto the other end of the support rod, the top end of the lifting rod is through the support rod and a handle is mounted on this end of the lifting rod, and a support plate is mounted on the bottom end of the lifting rod.

[0015] Furthermore, the lifting assembly is a scissor lift or a lifting mast.

[0016] The present invention has the following beneficial effects: 1. This invention provides an expansion plate around the platform assembly and a connecting component to allow the expansion plate to rotate and connect with the platform assembly. This allows the expansion plate to be unfolded during subsequent maintenance of high-altitude power system equipment, increasing the area of ​​the platform assembly. This facilitates the standing and movement of maintenance personnel and the conduct of maintenance work, ensuring maintenance efficiency. Furthermore, the increased platform assembly area allows for greater coverage of the power equipment, enabling the maintenance of large-volume equipment and reducing the number of times the maintenance device needs to be moved, thus improving maintenance efficiency. Compared to existing technologies, this invention offers the advantages of improved maintenance efficiency and shorter maintenance time.

[0017] 2. This invention incorporates a lifting component that drives the support plate to move up and down, allowing the fixed plate and the support plate to move up and down. After the lifting assembly adjusts the fixed plate to the working height, the lifting component further adjusts the support plate to achieve precise adjustment. That is, the lifting assembly makes large-range adjustments while the lifting component makes small-range adjustments, enabling maintenance personnel to accurately reach the required working position for smooth maintenance work. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the expansion board of the present invention when it is retracted; Figure 2 This is a schematic diagram of the structure of the extended plate of the present invention when it is unfolded; Figure 3 for Figure 2 Enlarged view of point A in the image; Figure 4 This is a structural schematic diagram of the invention from a low-angle view. Figure 5 This is a schematic diagram of the scissor lift mechanism in this invention. Figure 6 This is a schematic diagram of the supporting leg in this invention; Figure 7 This is a schematic diagram of the lifting component, which is a lifting mast, in this invention.

[0019] The reference numerals in the figure are as follows: 1. Vehicle body; 2. Extension plate; 3. Fixing plate; 4. Support plate; 5. Rotating shaft; 6. Connecting sleeve; 7. First connecting rod; 8. Second connecting rod; 9. Adjusting rod; 10. Lifting component; 11. Two-way thread; 12. Guide rod; 13. Anti-detachment block; 14. Insert sleeve; 15. Guardrail; 16. Support leg; 17. Fixing frame; 18. Insert rod; 19. Support rod; 20. Lifting rod; 21. Handle; 22. Support plate; 23. Scissor lift; 24. Lifting mast; 25. First hinge seat; 26. Second hinge seat; 27. Connecting hole; 28. First scissor arm; 29. ​​Second scissor arm; 30. First roller; 31. Second roller; 32. First drive rod; 33. Second drive rod; 34. Drive hydraulic cylinder; 35. Mounting plate; 36. Connecting plate; 37. First insertion hole; 38. Locking rod. Detailed Implementation

[0020] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0021] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] Example: Please refer to Figures 1-7This embodiment provides a maintenance device for high-altitude power systems, including a vehicle body 1 with drive wheels for movement. A lifting assembly is mounted on the vehicle body 1, and a platform assembly is fixedly mounted on its upper end. The lifting assembly can drive the platform assembly to move up and down on the vehicle body 1, facilitating maintenance personnel to perform necessary maintenance work on the high-altitude power equipment. Extension plates 2 are provided on all four sides of the platform assembly, one on each side. Each extension plate 2 is rotatably connected to the platform assembly via a connecting assembly, allowing the extension plates 2 located around the platform assembly to expand the area of ​​the platform assembly when unfolded, thereby increasing the area of ​​the platform assembly.

[0024] With the aforementioned setup, when inspecting high-altitude electrical equipment, the decision to deploy the extension plate 2 is first made based on the number of maintenance personnel and the size of the equipment. When the number of maintenance personnel is small or the equipment is small, and the platform component has sufficient area for maintenance, the extension plate 2 is retracted. The extension plate 2, through the connecting components, can be vertically positioned around the platform component, acting as a fence to prevent maintenance personnel from falling. When the number of maintenance personnel is large or the equipment is large, and the current platform component's area is insufficient for maintenance, the extension plate 2 can be rotated to a horizontal position relative to the platform component, increasing the platform component's area. This not only facilitates personnel movement but also allows the enlarged platform component to cover more equipment, reducing the number of times the maintenance device needs to be moved and improving maintenance efficiency.

[0025] In this embodiment, the platform component includes a horizontally arranged fixed plate 3, which is fixedly mounted on the upper end of the lifting component. A support plate 4 is arranged above the fixed plate 3, parallel to the fixed plate 3. Expansion plates 2 are arranged around the support plate 4. The connecting component includes a rotating shaft 5 and connecting sleeves 6. Connecting sleeves 6 are provided on the peripheral sidewalls of the support plate 4, and the specific number and positional distribution of connecting sleeves 6 on the support plate 4 can be selected according to actual conditions. The rotating shaft 5 is L-shaped and is provided on each expansion plate 2. The rotating shaft 5 on each expansion plate 2 corresponds one-to-one with the connecting sleeve 6 on the sidewall of the support plate 4 at the corresponding position of that expansion plate 2. One end of the rotating shaft 5 is fixedly connected to the expansion plate 2, and the other end is rotatably connected to the corresponding connecting sleeve 6. The expansion plate 2 can rotate with the support plate 4 under the action of the rotating shaft 5 and the connecting sleeve 6. To ensure the supporting and limiting function of the connecting assembly for the expansion plate 2, the connecting assembly also includes a first connecting rod 7 and a second connecting rod 8. The first connecting rod 7 and the second connecting rod 8 are distributed around the perimeter of the fixed plate 3 and are correspondingly positioned to the expansion plate 2. One end of the first connecting rod 7 is hinged to the corresponding side wall of the fixed plate 3, and one end of the second connecting rod 8 is hinged to the corresponding expansion plate 2. The other ends of the first connecting rod 7 and the second connecting rod 8 are connected by an adjusting rod 9. The first connecting rod 7, the adjusting rod 9, and the second connecting rod 8 combine to form a straight rod. When this straight rod rotates to a horizontal position relative to the fixed plate 3, its rigidity prevents the expansion plate 2 from rotating further downwards, thus supporting and limiting the expansion plate 2 and ensuring its expansion function. Since the expansion plate 2 is mounted on the support plate 4, there is a height difference between the support plate 4 and the fixed plate 3. This means that if the expansion plate 2 needs to continue rotating downwards, the length of the straight rod must be compressed; otherwise, rotation is impossible. When the straight rod rotates to a position perpendicular to the fixed plate 3, it will be unable to continue rotating due to the contact limit between the extension plate 2 and the support plate 4. At this time, the straight rod only plays a certain role in restricting the extension plate 2 by being hinged to the fixed plate 3.

[0026] With the aforementioned setup, maintenance personnel can inspect the electrical equipment while standing on the support plate 4. When the extension plate 2 is retracted, it stands vertically around the support plate 4, acting as a barrier to prevent personnel from falling. When the extension plate 2 is extended over the support plate 4, rotating it to make it horizontal, the area of ​​the support plate 4 is increased, facilitating movement and providing more space for maintenance personnel. Furthermore, when the extension plates 2 are extended, gaps are formed between adjacent plates. These gaps can be aligned with the corners of the electrical equipment. When the platform assembly is raised, the equipment can be positioned within the gaps between the two extension plates, allowing maintenance personnel to inspect both sides simultaneously without needing to move the maintenance device.

[0027] It should be noted that, in this embodiment, a first hinge seat 25 is fixedly provided on the side of the fixed plate 3, and a second hinge seat 26 is fixedly provided on the side of the extension plate 2. One end of the first connecting rod 7 is hinged to the first hinge seat 25 by bolts to be hinged together with the fixed plate 3. The second connecting rod 8 is hinged to the second hinge seat 26 by bolts to be hinged together with the extension plate 2. The provision of the first hinge seat 25 and the second hinge seat 26 can improve the stability of the hinge between the first connecting rod 7 and the fixed plate 3 and improve the stability of the hinge between the second connecting rod 8 and the extension plate 2. At the same time, when it is necessary to disassemble the first connecting rod 7 and the second connecting rod 8, the required disassembly work can be carried out simply by unscrewing the bolts.

[0028] It should be noted that, in another embodiment, the straight rod in the aforementioned connecting assembly can also be a hydraulic cylinder or an electric push rod. The fixed end of the hydraulic cylinder or electric push rod is hinged to the fixed plate 3, and the movable end of the hydraulic cylinder or electric push rod is hinged to the extension plate 2. The extension plate 2 can be expanded or retracted by extending and retracting the movable end of the hydraulic cylinder or electric push rod, and the extension plate 2 can be fixed, thereby facilitating the standing of maintenance personnel.

[0029] To ensure maintenance personnel can accurately reach the required working position, in this embodiment, a lifting member 10 is also fixedly installed on the bottom surface of the fixed plate 3. The movable part of the lifting member 10 passes through the fixed plate 3 and is fixedly connected to the support plate 4. The lifting member 10 can drive the support plate 4 to move up and down. The lifting member 10 can be an electric push rod or a hydraulic cylinder. When the lifting member 10 starts working, it drives the support plate 4 to move up and down through the extension and retraction of its movable part, so that the fixed plate 3 and the support plate 4 can move up and down. After the lifting assembly adjusts the fixed plate 3 to the working height, the lifting member 10 further adjusts the support plate 4 to achieve precise adjustment. That is, the lifting assembly makes a large-range adjustment, and the lifting member 10 makes a small-range adjustment, so that maintenance personnel can accurately reach the required working position, so that the maintenance work can be carried out smoothly.

[0030] Due to the installation of the lifting component 10, the distance between the fixed plate 3 and the support plate 4 will change. To adapt to this change, in this embodiment, the adjusting rod 9 has symmetrically arranged bidirectional threads 11 on its rod wall, with bidirectional threads 11 distributed on both sides of the adjusting rod 9. The ends of the first connecting rod 7 and the second connecting rod 8 close to the adjusting rod 9 are both provided with threaded holes that are compatible with the bidirectional threads 11. The adjusting rod 9 is threadedly connected to the first connecting rod 7 and the second connecting rod 8 by connecting the bidirectional threads 11 on both ends to the corresponding threaded holes. Thus, when the distance between the fixed plate 3 and the support plate 4 changes, by rotating the adjusting rod 9, the adjusting rod 9 can simultaneously extend into or retract from the first connecting rod 7 and the second connecting rod 8 under the action of the bidirectional threads 11 on both sides. This allows adjustment of the overall length of the straight rod consisting of the first connecting rod 7, the adjusting rod 9, and the second connecting rod 8, thereby adapting to the change in the distance between the fixed plate 3 and the support plate 4. Meanwhile, when the distance between the support plate 4 and the fixed plate 3 increases, the straight rod, after adjusting its length to adapt to this change, connects with the extension plate 2 and the fixed plate 3, which are horizontally set with the support plate 4. The three can form a triangular structure, which can provide more reliable support for the extension plate 2.

[0031] To ensure the reliability of the movement of the support plate 4 under the action of the lifting member 10, in this embodiment, a plurality of vertically arranged guide rods 12 are fixedly installed on the top surface of the fixed plate 3. The specific number and position distribution of the guide rods 12 on the fixed plate 3 can be selected according to the actual situation. Each guide rod 12 is movably installed through the support plate 4, so that the support plate 4 can be slidably installed on the guide rod 12. An anti-detachment block 13 is fixedly installed on the top end of each guide rod 12, and the diameter of the anti-detachment block 13 is larger than the diameter of the guide rod 12. With the above-mentioned arrangement, during the up-and-down movement of the support plate 4 under the action of the lifting member 10, the support plate 4 slides along the guide rod 12. The guide rod 12 can prevent relative rotation between the support plate 4 and the fixed plate 3, making the movement of the support plate 4 more stable. The anti-detachment block 13 can limit the movement of the support plate 4, preventing the support plate 4 from separating from the guide rod 12, thereby improving safety. Meanwhile, when the extension plate 2 is in the vertically retracted state, the extension plate 2 and the guide rod 12 can be tied together by ropes or other components to prevent the extension plate 2 from suddenly unfolding under external forces such as vibration, thus avoiding danger.

[0032] In this embodiment, the guide rod 12 may also be provided with a connecting hole 27, which can hook a safety belt. When maintenance personnel stand on the support plate 4, since it is a high-altitude operation, the maintenance personnel need to wear a safety belt. One end of the safety belt can be hooked on the connecting hole 27, which can further play a safety protection role and avoid the maintenance personnel from falling from a height.

[0033] To improve the safety of this maintenance device, in this embodiment, each extension plate 2 is fixedly equipped with a plug-in sleeve 14, and each plug-in sleeve 14 is fitted with a guardrail 15. With this arrangement, when the extension plate 2 is in the retracted state, the guardrail 15 can be pulled out from the plug-in sleeve 14, and then stacked on the support plate 4. After the extension plate 2 is extended, the guardrail 15, inserted into the plug-in sleeve 14, can protect the maintenance personnel standing on the extension plate 2, thus providing protection for them.

[0034] In this embodiment, the lifting assembly can be a scissor lift 23 or a lifting mast 24. When the lifting assembly is a scissor lift 23, the platform assembly, specifically the fixed plate 3 in the platform assembly, is fixedly installed at the upper end of the scissor lift 23; the lifting of the scissor lift 23 can drive the platform assembly to rise or fall, thereby enabling the maintenance and repair of high-altitude electrical equipment.

[0035] It should be noted that the scissor lift 23 includes two parallel first scissor arms 28 and two parallel second scissor arms 29, with the middle portions of the first scissor arms 28 and second scissor arms 29 on the same side hinged together. The bottom ends of both first scissor arms 28 are hinged to the vehicle body 1, and each has a first roller 30 rotatably mounted on its top end. Both first rollers 30 on both sides are in rolling contact with the bottom surface of the fixed plate 3. A slide rail can be provided on the bottom surface of the fixed plate 3 to match the first rollers 30. The top ends of both second scissor arms 29 are hinged to the bottom surface of the fixed plate 3, and each has a second roller 31 rotatably mounted on its bottom end. Both second rollers 31 on both sides are in rolling contact with the vehicle body 1. A slide rail can also be provided on the vehicle body 1 to match the second rollers 31. A first drive rod 32 is fixedly connected between the two first scissor arms 28, and a second drive rod 33 is fixedly arranged between the two second scissor arms 29. A drive hydraulic cylinder 34 is arranged between the first drive rod 32 and the second drive rod 33, and the two ends of the drive hydraulic cylinder 34 are respectively hinged to the first drive rod 32 and the second drive rod 33. With the aforementioned arrangement, when the piston rod of the drive hydraulic cylinder 34 extends or retracts, it pushes the first drive rod 32 and the second drive rod 33 to move, thereby driving the first scissor arms 28 and the second scissor arms 29 to rotate accordingly. At this time, the first roller 30 and the second roller 31 roll on the fixed plate 3 and the vehicle body 1 respectively to adapt to this process. When the first scissor arms 28 and the second scissor arms 29 rotate, the included angle between them can change, thereby changing their own height, thereby driving the platform assembly set on them to move up or down.

[0036] When the lifting assembly is a lifting mast 24, the lifting mast 24 is a conventional device in this field, so its specific structure will not be described in detail here. The lifting mast 24 is vertically installed on the vehicle body 1. The platform assembly, specifically the fixing plate 3 in the platform assembly, is fixedly installed at the top of the lifting mast 24. The lifting mast 24 can drive the platform assembly to rise or fall, thereby realizing the inspection and maintenance of high-altitude electrical equipment.

[0037] To improve the stability of this maintenance device during maintenance, in this embodiment, support legs 16 are also provided around the vehicle body 1 to support it. When maintaining high-altitude electrical equipment, the center of gravity of this maintenance device rises due to the increase in the height of the platform components, which reduces the stability of the device. Therefore, the support legs 16 support the vehicle body 1 to make the maintenance device more stable and prevent it from tipping over.

[0038] In this embodiment, the support leg 16 includes a fixing frame 17 fixedly mounted on the vehicle body 1. One end of the plug-in rod 18 is rotatably mounted on the fixing frame 17. Specifically, the fixing frame 17 includes an L-shaped mounting plate 35, which is fixedly mounted at the top corner of the vehicle body 1. A semi-circular connecting plate 36 is fixedly mounted on the mounting plate 35, and a support shaft is fixedly mounted at the center of the connecting plate 36. The plug-in rod 18 is rotatably mounted on the plug-in shaft, thereby realizing the rotatable connection between the plug-in rod 18 and the fixing frame 17. The connecting plate 36 has a plurality of first plug holes 37 evenly arranged along the circumference with the support shaft as the circle. The plug-in rod 18 is provided with a second plug hole. When the angle of the plug-in rod 18 is adjusted, the second plug hole rotates with the plug-in rod 18. After the plug-in rod 18 is adjusted, the second plug hole coincides with one of the first plug holes 37. Then, a locking rod 38 is inserted into the first plug hole 37 and the second plug hole to lock and fix the plug-in rod 18. One end of a support rod 19 is inserted into the other end of the plug rod 18. The other end of the support rod 19 is threadedly connected to a lifting rod 20. The top end of the lifting rod 20 is set through the support rod 19 and a handle 21 is set on this end of the lifting rod 20. A support plate 22 is fixedly set at the bottom end of the lifting rod 20.

[0039] With the aforementioned configuration, when the support leg 16 supports the vehicle body 1, the support angle of the support leg 16 can be adjusted by rotating the plug rod 18, and the lifting rod 20 can be moved up and down by rotating the handle 21 to adjust the horizontal position of the support plate 22, thereby adjusting the support point of the support leg 16 so that the support leg 16 can adapt to the support of various different terrain structures, thus enabling this maintenance device to be used in various different terrain structures.

[0040] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A maintenance device for high-altitude power systems, comprising a vehicle body (1), a lifting assembly mounted on the vehicle body (1), and a platform assembly mounted on the lifting assembly, wherein the lifting assembly is capable of driving the platform assembly to move up and down on the vehicle body (1), characterized in that: The platform component is provided with expansion plates (2) on all four sides. Each expansion plate (2) is rotatably connected to the platform component by a connecting component. The expansion plate (2) can expand the area of ​​the platform component by rotating on the platform component.

2. The maintenance device for high-altitude power systems according to claim 1, characterized in that: The platform component includes a fixed plate (3), which is mounted on the lifting component. A support plate (4) is mounted above the fixed plate (3), and extension plates (2) are arranged around the support plate (4). The connecting component includes a rotating shaft (5) and a connecting sleeve (6). The connecting sleeve (6) is mounted on the side wall of the support plate (4). The rotating shaft (5) is L-shaped and is mounted on each extension plate (2). One end of the rotating shaft (5) is fixedly connected to the extension plate (2), and the other end is rotatably connected to the corresponding connecting sleeve (6). The extension plate (2) rotates with the support plate (4) under the action of the rotating shaft (5) and the connecting sleeve (6).

3. A maintenance device for high-altitude power systems according to claim 2, characterized in that: The connecting assembly also includes a first link (7) and a second link (8). One end of the first link (7) is hinged to the fixed plate (3), and one end of the second link (8) is hinged to the extension plate (2). The other end of the first link (7) and the other end of the second link (8) are connected together by an adjusting rod (9).

4. A maintenance device for high-altitude power systems according to claim 3, characterized in that: A lifting member (10) is also provided on the bottom surface of the fixed plate (3). The movable part of the lifting member (10) passes through the fixed plate (3) and is fixedly connected to the support plate (4). The lifting member (10) can drive the support plate (4) to move up and down.

5. A maintenance device for high-altitude power systems according to claim 4, characterized in that: The adjusting rod (9) has a symmetrically arranged bidirectional thread (11) on its rod wall. The ends of the first connecting rod (7) and the second connecting rod (8) close to the adjusting rod (9) are both provided with threaded holes that are compatible with the bidirectional thread (11). The adjusting rod (9) is threadedly connected to the first connecting rod (7) and the second connecting rod (8) by connecting its two ends with the threaded holes at the corresponding positions.

6. A maintenance device for high-altitude power systems according to claim 4, characterized in that: A guide rod (12) is also provided on the top surface of the fixing plate (3). The guide rod (12) is movably connected through the support plate (4). An anti-detachment block (13) is provided on the top end of the guide rod (12). The diameter of the anti-detachment block (13) is larger than the diameter of the guide rod (12).

7. A maintenance device for high-altitude power systems according to claim 1, characterized in that: Each of the aforementioned expansion plates (2) is fixedly provided with a plug sleeve (14), and a guardrail (15) is inserted inside the plug sleeve (14).

8. A maintenance device for high-altitude power systems according to claim 1, characterized in that: The vehicle body (1) is also provided with support legs (16) around its perimeter for supporting the vehicle body (1).

9. A maintenance device for high-altitude power systems according to claim 8, characterized in that: The support leg (16) includes a fixed frame (17) mounted on the vehicle body (1). One end of a plug rod (18) is mounted on the fixed frame (17). One end of a support rod (19) is mounted on the other end of the plug rod (18). A lifting rod (20) is threaded onto the other end of the support rod (19). The top end of the lifting rod (20) is through the support rod (19), and a handle (21) is mounted on this end of the lifting rod (20). A support plate (22) is mounted on the bottom end of the lifting rod (20).

10. A maintenance device for high-altitude power systems according to claim 1, characterized in that: The lifting assembly is a scissor lift (23) or a lifting mast (24).

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