Three-position isolated grounding switch assembly device

Abstract

The application relates to a three-station isolation grounding switch assembly device. The device comprises a base, a turnover mechanism and a moving mechanism fixedly installed on the base, the turnover mechanism comprises a turnover driving mechanism and a turnover support connected with the turnover driving mechanism, the turnover support is provided with a fixing structure for fixedly connecting a moving end insulating part, the moving mechanism is guided and moved along a direction perpendicular to a turnover axis of the turnover support and is installed on the base, and the moving mechanism is used for moving a supporting part supported by the moving end from a static end installation port of a cylinder into the cylinder and connecting with the moving end insulating part. The application provides a three-station isolation grounding switch assembly device, which is used for realizing the assembly of the three-station isolation grounding switch, can conveniently realize the assembly of the three-station isolation grounding switch, saves manpower, reduces labor intensity, the moving and connecting process of the moving end is relatively stable, the risk of the moving end colliding with the cylinder is eliminated, and the assembly quality is ensured.

Description

Technical Field

[0001] This invention relates to the field of specialized equipment for assembling switchgear, and more particularly to a three-position isolating grounding switch assembly device. Background Technology

[0002] Gas-insulated metal-enclosed switchgear (GIS) is widely used in substations. Its operational stability directly affects the stability of power grid transmission lines and substations. Quality problems with GIS can lead to significant economic losses. The three-position isolating grounding switch is a key component of GIS equipment, and its assembly quality directly impacts the safe and stable operation of the power grid. The structure of the three-position isolating grounding switch is as follows: Figure 1 As shown, given its structure, during assembly, the moving end insulating component 13 needs to be assembled with the moving end interface 10 on the cylinder 1 first, then the moving end 14 needs to be assembled with the moving end insulating component 13, then the stationary end 15 needs to be assembled with the stationary end interface 11 on the cylinder 1 and ensure that the stationary end 15 and the moving end 14 are coaxially aligned, and finally the quick grounding 16 needs to be connected with the grounding interface 12 on the cylinder 1.

[0003] In traditional assembly methods, the cylinder body is first placed on a plastic pallet with the moving end facing upwards. The moving end insulation component is then lifted and connected to the cylinder body. Next, the cylinder body is rotated 90° so that the stationary end faces upwards. The moving end is then lifted and connected to the moving end insulation component through the electrostatic connection. The stationary end and quick grounding are then lifted and connected to the cylinder body sequentially. After all connections are completed, product testing is performed. The entire assembly process requires a crane and manual labor to rotate the cylinder body. After rotation, it is difficult to place it stably, and lifting the moving end is challenging. The unstable process during lifting and connecting the moving end can easily damage the product, affecting assembly quality and consequently severely impacting the stability and reliability of the GIS equipment. Summary of the Invention

[0004] The purpose of this invention is to provide a three-position isolating grounding switch assembly device to solve the problems of time-consuming and labor-intensive assembly process and difficulty in ensuring assembly quality of existing three-position isolating grounding switches.

[0005] The three-position isolating grounding switch assembly device of the present invention adopts the following technical solution:

[0006] The three-position isolating grounding switch assembly includes a base, on which a flipping mechanism and a transfer mechanism are fixedly installed. The flipping mechanism includes a fixed bracket, on which a flipping drive mechanism and a flipping bracket linked to the flipping drive mechanism are configured. The flipping bracket has a fixed structure for fixing and connecting the moving end insulating component. After the moving end insulating component is fixed to the fixed structure, the flipping bracket can flip the moving end insulating component to a horizontal state and a vertical state under the drive of the flipping drive mechanism. The flipping mechanism has a accommodating space for the cylinder to dock with the horizontal moving end insulating component from top to bottom with its axis perpendicular to the flipping axis of the flipping bracket. The transfer mechanism is guided and moved on the base in a direction perpendicular to the flipping axis of the flipping bracket. The transfer mechanism includes a support part for supporting the moving end. The transfer mechanism is used to send the moving end supported by the support part from the stationary end mounting port of the cylinder into the cylinder and dock with the moving end insulating component.

[0007] This invention provides a pioneering assembly device for a three-position disconnector switch, used for the assembly of a three-position disconnector grounding switch. In use, the moving end insulator is first fixed to a flipping bracket. Then, the hoisting cylinder is aligned with the moving end insulator. Next, a transfer mechanism moves the moving end from the stationary end interface into the cylinder and connects it to the moving end insulator. The flipping mechanism then flips the cylinder to a position with the stationary end interface facing upwards for hoisting and alignment of the stationary end and the quick grounding connection, until the assembly is complete. The flipping mechanism then flips the switch back to its original position for testing. This assembly device facilitates the assembly of three-position disconnector grounding switches, saving manpower and reducing labor intensity. Furthermore, the moving end alignment process is relatively stable, eliminating the risk of the moving end colliding with the cylinder and ensuring assembly quality.

[0008] Furthermore, at least one of the flipping mechanism and the transfer mechanism is height-adjustable to facilitate the vertical alignment of the moving end with the stationary end. This design ensures that the moving end can reliably enter the cylinder without colliding with it, thus guaranteeing assembly quality.

[0009] Furthermore, the transfer mechanism is height-adjustable. It includes a movable seat that guides the base and a support frame disposed on the movable seat. The support frame includes a lifting strut and a supporting beam, with the support portion located at the end of the supporting beam. This transfer mechanism achieves height adjustment through a simple structure, significantly simplifying the device structure and reducing manufacturing and operating costs compared to making the tilting mechanism height-adjustable.

[0010] Furthermore, a pre-storage placement rack is installed on the base on the side of the transfer mechanism opposite to the flipping mechanism to fix the moving end, and the supporting beam is rotated around the vertical axis and installed on the lifting column. This facilitates the transfer of the moving end to the transfer mechanism, and the transfer process is relatively stable, less prone to bumps, avoids damage to product parts, and ensures assembly quality.

[0011] Furthermore, the fixed bracket includes parallel supporting frames, with the tilting bracket rotatably mounted between the two supporting frames about a horizontally extending axis. The tilting bracket has an upward-opening U-shaped frame structure, and the fixed structure is provided on the bottom edge of the U-shaped frame. The space within the groove formed by the U-shaped frame constitutes the receiving space. This structural arrangement ensures the structural stability of the tilting mechanism and gives it a strong load-bearing capacity.

[0012] Furthermore, at least one of the two opposing frame sections of the U-shaped frame is provided with a driven meshing component centered on the flipping axis. The flipping drive mechanism includes a drive motor (219), which meshes with the driven meshing component through a drive gear connected to its output end, thereby driving the U-shaped frame to flip. The flipping of the support is achieved by the meshing of the drive gear and the arc-shaped transmission rack. The transmission structure is simple, the control is relatively convenient, and the load on the drive motor is small, reducing the requirements for the drive motor.

[0013] Furthermore, at least one of the two opposing frame sections of the U-shaped frame is a sector-shaped plate with the flipping axis as its center. The arc-shaped edge of the sector-shaped plate has radially outward-facing teeth, and the arc-shaped transmission rack formed by the toothed arc-shaped edge of the sector-shaped plate constitutes the driven meshing component. This flipping bracket structure has relatively reliable strength, is relatively easy to manufacture, and has good stability during flipping.

[0014] Furthermore, the two opposing frame sections of the U-shaped frame are both sector-shaped plates, with corresponding central angles of 90° and two vertical sides. The bottom edge of the U-shaped frame is perpendicular to one of the vertical sides of the sector-shaped plates. This minimizes the volume of the flipping bracket, increases the assembly and operation space, simplifies the structure of the flipping mechanism, and reduces costs.

[0015] Furthermore, two pinions are rotatably mounted on both support frames. These pinions are located directly below the tilting axis and mesh with the arc-shaped transmission racks on their respective sector plates. The output end of the drive motor extends towards one of the support frames and is connected to the pinion on that support frame. This ensures that the forces on both sides of the tilting bracket are balanced, guaranteeing the stability of the tilting bracket during the tilting process.

[0016] Furthermore, the bottom edge of the U-shaped frame includes an annular flange and connecting elbows symmetrically fixed to the outside of the annular flange. The connecting elbows are fixedly connected to the two opposing frame parts of the U-shaped frame, and the annular flange constitutes the fixing structure. This fixing structure is relatively simple and can stably and reliably fix the moving end insulating component and support the cylinder mated to the moving end insulating component, thus improving the reliability of the entire device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a three-position isolating grounding switch;

[0018] Figure 2 This is a top view of a first embodiment of the three-position isolating grounding switch assembly device of the present invention;

[0019] Figure 3 This is a front view of a first embodiment of the three-position isolating grounding switch assembly device of the present invention;

[0020] Figure 4 for Figure 3 View from P in the middle.

[0021] In the diagram: 1. Cylinder body; 10. Moving end interface; 11. Stationary end interface; 12. Grounding interface; 13. Moving end insulation component; 14. Moving end; 15. Stationary end; 16. Quick grounding; 20. Base; 210. Support frame; 211. Sector plate; 212. Annular flange; 213. Connecting bend plate; 2110. Arc-shaped transmission rack; 216. Pinion; 218. Control cabinet; 219. Drive motor; 22. Linear guide rail; 220. Limit block; 230. Moving seat; 231. Lifting column; 232. Support beam; 233. Support part; 24. Pre-storage rack; 240. Rack column; 241. Moving end fixed seat. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, and not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0024] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0025] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0026] Embodiment 1 of the three-position isolating grounding switch assembly device of the present invention:

[0027] In this embodiment, the three-position isolating grounding switch assembly includes a base 20, which is generally elongated. A flipping mechanism, a transfer mechanism, and a pre-storage rack 24 are provided on the base 20, and these mechanisms are arranged sequentially along the length of the elongated base 20. Figure 2-4 Taking the orientation shown as an example, the flipping mechanism is located at the left end of the base 20, the pre-storage rack 24 is located at the right end of the base 20, and the transfer mechanism is located between the two. For ease of explanation, the direction of the interval between the flipping mechanism and the pre-storage rack 24 is taken as the left-right direction.

[0028] The flipping mechanism includes a fixed bracket, a flipping drive mechanism mounted on the fixed bracket, and a flipping bracket itself. The flipping bracket is rotatably mounted on the fixed bracket, and the flipping drive mechanism is connected to the flipping bracket and drives it to flip. Specifically, the fixed bracket includes support frames 210 arranged side by side in the front-rear direction, with the flipping bracket rotatably mounted between the two support frames 210 about a horizontally extending axis. The flipping bracket has an overall U-shaped frame structure with the opening facing upwards. The two opposing frame structures of the U-shaped frame are sector plates 211, and the two sector plates 211 are respectively positioned close to the two support frames 210. Considering that only a 90° flip of the components is required during the assembly of the switch, the central angle of the sector plate 211 is 90°, including two vertical sides and an arc side. The sector plate 211 is rotatably assembled with the flipping bracket at the apex position where the two vertical sides connect. The outer surface of the arc side has radially outward-facing gear teeth, making the entire arc side form an arc-shaped transmission rack 2110.

[0029] A fixing structure is provided on the bottom frame of the U-shaped frame. This fixing structure is used to fix the moving end insulating component 13, such as... Figure 2-4 As shown, the bottom frame of the U-shaped frame includes an annular flange 212 and connecting elbow plates 213 symmetrically fixed to the outside of the annular flange 212. The connecting elbow plates 213 are L-shaped elbow plates, with their horizontal sides fixedly connected to the annular flange 212 and their vertical sides fixedly connected to the sector plate 211. The annular flange 212 forms a fixed structure, and the moving end insulating component 13 can be fixed to the annular flange 212 by means of the flange connection holes on it. Among them, the vertical side of the connecting elbow plate 213 is fixed close to the vertical side of the sector plate 211, and the flange face of the annular flange 212 is perpendicular to the vertical side, so as to ensure that the moving end insulating component 13 can be rotated 90° by the flipping bracket after being fixed to the annular flange 212.

[0030] The fixed bracket and the flip bracket adopt the above structure. The space inside the U-shaped groove formed by the U-shaped frame constitutes the accommodating space, which can allow the moving end insulating component 13 to be hoisted and fixed on the annular flange 212 from top to bottom, and can also allow the cylinder 1 to be hoisted and fixed on the moving end insulating component 13 from top to bottom in an axially extended posture, so as to realize the docking connection between the moving end insulating component 13 and the cylinder 1.

[0031] The flipping drive mechanism includes a drive motor 219 and a drive gear. The drive gear meshes with an arc-shaped transmission rack 2110 and drives the flipping bracket to flip. Specifically, in this embodiment, two pinions 216 are rotatably mounted on the two support frames 210 respectively. The two pinions 216 are located directly below the flipping axis of the flipping bracket. One pinion 216 is connected to the drive motor 219 and meshes with one of the arc-shaped transmission racks 2110 to form a drive gear. The other pinion 216 is paired with the drive gear and meshes with another arc-shaped transmission rack. That is, of the two pinions 216, one is the drive gear and the other is only a matching gear that rotates with the drive. This arrangement is made so that both arc-shaped plates of the flipping bracket are supported by the pinions 216, ensuring that the forces on both sides of the flipping bracket are balanced and improving the stability and reliability of the flipping bracket during the flipping process.

[0032] Of the two support frames 210, a drive motor 219 is fixedly mounted on the outer side of one, and the output shaft of the drive motor 219 is connected to the drive gear for anti-rotation. A control cabinet 218 is fixedly mounted on the outer side of the other support frame, and a control host is arranged inside the control cabinet 218 to control the electrical operation of the entire device. The space between the two support frames 210 below the tilting bracket is left empty to avoid the components when the tilting bracket tilts the components.

[0033] The base 20 is provided with a linear guide rail 22 extending to the left and right. The transfer mechanism includes a movable seat 230 that is guided and cooperates with the linear guide rail 22 and a support frame disposed on the movable seat 230. The support frame includes a lifting column and a support beam 232. The end of the support beam 232 has a support portion 233 for supporting the moving end 14. The supporting beam 232 is located at the upper end of the lifting column and can rotate freely around it. When the transfer mechanism moves towards the pre-storage rack 24, the supporting beam 232 can be rotated so that the supporting part 233 faces the pre-storage rack 24. The lifting column then raises and lowers the supporting beam 232, stably lifting the moving end 14 on the pre-storage rack 24. After the supporting beam 232 stably lifts the moving end 14, the transfer mechanism moves towards the flipping mechanism, rotating the supporting beam 232 so that it extends towards the flipping mechanism. The lifting column then raises and lowers the supporting beam so that the moving end 14 aligns with the stationary end interface 11 of the cylinder 1, allowing the moving end 14 to smoothly enter the cylinder 1 and complete the connection with the moving end insulation component 13. The transfer mechanism enables stable and convenient reception and delivery of the moving end 14, greatly reducing labor intensity and preventing collisions between the moving end 14 and the cylinder 1, thus ensuring assembly quality.

[0034] Of course, in order to further improve the safety of the assembly process, limit blocks 220 are provided at both ends of the linear guide 22 to limit the movement limit position of the moving seat 230 and avoid damage to the parts due to excessive movement.

[0035] The pre-storage rack 24 includes a rack column 240 and a placement bracket mounted on the upper end of the rack column 240. The placement bracket extends laterally and has movable end fixing seats 241 at both ends for fixing and supporting the movable end 14. The rack column 240 is rotatably mounted on the base 20 around its own axis, and the movable end fixing seats 241 are rotatably mounted on the placement bracket around their own axes, making it more flexible to use.

[0036] The control host installed inside the control cabinet 218 is connected to the drive motor 219 and the lifting column. It can control the flipping mechanism to perform flipping actions and the lifting column to perform direct lowering actions based on human-machine interaction information, which can facilitate assembly work for assembly personnel.

[0037] In this embodiment, the three-position isolating grounding switch assembly device first controls the flipping mechanism to flip the annular flange 212 to a horizontal position, then hoists the moving end insulating component 13 and fixes it on the annular flange 212. Next, it hoists the cylinder 1, positioning it with the moving end interface 10 facing downwards, the axis extending horizontally, and the stationary end interface 11 facing the transfer mechanism, and connects it to the moving end insulating component 13. Then, the transfer mechanism lifts the moving end 14 from the pre-stored rack 24 and moves it towards the cylinder 1, thus transferring the moving end... 14. The moving end 14 is fed into the cylinder 1 from the stationary end interface 11 until it mates with the moving end insulating component 13. During this process, the lifting column can be controlled to prevent the moving end 14 from colliding with the cylinder 1, thus completing the fixed connection between the moving end 14 and the moving end insulating component 13. Then, it is removed from the transfer mechanism, and the flipping mechanism is controlled to rotate 90° until the stationary end interface 11 faces upward. Then, the stationary end 15 and the quick grounding 16 are hoisted separately, and the docking connection between the stationary end 15 and the quick grounding 16 and the cylinder 1 is completed. Finally, the product is transferred to the subsequent process. The labor intensity of the whole process is greatly reduced, and the docking process of the parts is stable and not easily damaged, ensuring the assembly quality.

[0038] The above describes one embodiment of the three-position isolating grounding switch assembly device of the present invention. Other preferred embodiments of the three-position isolating grounding switch assembly device based on the design concept of the present invention are also provided below.

[0039] Embodiment 2 of the three-position isolating grounding switch assembly device of the present invention:

[0040] The difference between this embodiment and Embodiment 1 above is that: no pre-storage rack is provided on the base, the tilting bracket is located at the left end of the base, and the linear guide rail extends from the right side of the tilting bracket to the right end of the base, thus further simplifying the structure and floor space of the assembly device. In use, the moving end can be hoisted onto the support portion of the supporting beam. Of course, in this case, the supporting beam of the transfer mechanism can be fixedly installed on the upper end of the lifting column.

[0041] Embodiment 3 of the three-position isolating grounding switch assembly device of the present invention:

[0042] The difference between this embodiment and the above embodiment 1 is that the heights of both the transfer mechanism and the flipping mechanism are not adjustable. There is a specific height relationship between the height of the support part of the transfer mechanism and the height of the fixed structure on the flipping bracket. This specific height relationship ensures that when the transfer mechanism supports the moving end and moves toward the flipping mechanism, the moving end can be accurately and smoothly sent into the cylinder without bumping into the cylinder. In order to facilitate the transfer mechanism to pick up the moving end from the pre-stored placement rack, the pre-stored placement rack can be set as a height-adjustable lifting rack.

[0043] Embodiment 4 of the three-position isolating grounding switch assembly device of the present invention:

[0044] The difference between this embodiment and Embodiment 1 above is that the height of the tilting mechanism is adjustable, and a lifting platform, such as a scissor lift, is fixedly installed at the left end of the base. The tilting mechanism is mounted entirely on the scissor lift, which is connected to the control host and can be controlled to lift. This allows for height adjustment between different components by adjusting the tilting mechanism and / or the transfer mechanism, facilitating final assembly. Of course, in this case, the transfer mechanism may no longer have a lifting function, and a fixed support column can be used for the lifting operation.

[0045] Embodiment 5 of the three-position isolating grounding switch assembly device of the present invention:

[0046] The difference between this embodiment and the above embodiment 1 is that: the end of the supporting beam is provided with a clamping structure. The clamping structure is used to clamp and fix the moving end. When the transfer mechanism removes the moving end from the pre-stored placement rack, the moving end is clamped by the clamping structure, and the clamping structure constitutes the supporting part.

[0047] Embodiment 6 of the three-position isolating grounding switch assembly device of the present invention:

[0048] The difference between this embodiment and the above embodiment 1 is that: the fixed bracket includes a vertical bracket located in the middle of the front-rear direction of the base, a reduction motor is fixedly installed on one side of the upper end of the vertical bracket, the flip bracket is rotatably installed on the top of the vertical bracket around the horizontal axis, and the output shaft of the reduction motor is connected to the flip bracket.

[0049] Embodiment 7 of the three-position isolating grounding switch assembly device of the present invention:

[0050] The difference between this embodiment and Embodiment 1 above is that: the two opposing frame parts of the U-shaped frame are both flat plate structures, and an arc-shaped extended rack is welded or bolted to the inner side of the flat plate structure, which constitutes an arc-shaped transmission rack; or in other embodiments, the two opposing frame parts of the U-shaped frame are both disc gears, and an annular flange is fixed on the disc gear's wheel, with the disc gear also serving as a driven meshing component.

[0051] Embodiment 8 of the three-position isolating grounding switch assembly device of the present invention:

[0052] The difference between this embodiment and the above embodiment 1 is that: only one of the two support frames has a small gear as the driving gear on the one where the drive motor is installed, and the other support frame does not have a small gear installed.

[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A three-position isolating grounding switch assembly device, characterized in that, The system includes a base (20), on which a flipping mechanism and a transfer mechanism are fixedly mounted. The flipping mechanism includes a fixed bracket, on which a flipping drive mechanism and a flipping bracket linked to the flipping drive mechanism are configured. The flipping bracket has a fixed structure for fixing and connecting the moving end insulating member (13). After the moving end insulating member (13) is fixed to the fixed structure, the flipping bracket can flip the moving end insulating member (13) to a horizontal state and a vertical state under the drive of the flipping drive mechanism. The flipping mechanism has a space for accommodating empty space. The cylinder (1) is positioned so that its axis is perpendicular to the flipping axis of the flipping bracket and is connected from top to bottom to the horizontally positioned moving end insulating member (13). The transfer mechanism is guided and moved along the direction perpendicular to the flipping axis of the flipping bracket and is mounted on the base (20). The transfer mechanism includes a support part (233) for supporting the moving end (14). The transfer mechanism is used to send the moving end (14) supported by the support part (233) from the static end (15) mounting port of the cylinder (1) into the cylinder (1) and connect it to the moving end insulating member (13).

2. The three-position isolating grounding switch assembly according to claim 1, characterized in that, At least one of the flipping mechanism and the transfer mechanism is height-adjustable so that the moving end (14) can align with the stationary end interface (11) in the vertical direction.

3. The three-position isolating grounding switch assembly according to claim 2, characterized in that, The height of the transfer mechanism is adjustable. The transfer mechanism includes a movable seat (230) that guides and cooperates with the base (20) and a support frame disposed on the movable seat (230). The support frame includes a lifting column and a support beam (232). The support part (233) is located at the end of the support beam (232).

4. The three-position isolating grounding switch assembly according to claim 3, characterized in that, A pre-storage placement rack (24) is installed on the base (20) on the side of the transfer mechanism opposite to the flipping mechanism for fixing the moving end (14), and the supporting beam (232) is rotatably installed on the lifting support.

5. The three-position isolating grounding switch assembly according to any one of claims 1-4, characterized in that, The fixed bracket includes two parallel support frames (210). The flip bracket is rotatably installed between the two support frames (210) around a horizontally extending axis. The flip bracket has an upward-opening U-shaped frame structure. The fixed structure is provided on the bottom edge of the U-shaped frame. The space inside the groove formed by the U-shaped frame constitutes the receiving space.

6. The three-position isolating grounding switch assembly according to claim 5, characterized in that, At least one of the two opposing frame parts of the U-shaped frame is provided with a driven engagement component centered on the flipping axis. The flipping drive mechanism includes a drive motor (219). The drive motor (219) engages with the driven engagement component through a drive gear that is connected to its output end and drives the U-shaped frame to flip.

7. The three-position isolating grounding switch assembly according to claim 6, characterized in that, At least one of the two opposing frame parts of the U-shaped frame is a fan-shaped plate (211) with the rotation axis as the center. The arc edge of the fan-shaped plate (211) is provided with radially outward gear teeth. The arc-shaped transmission rack (2110) formed by the arc edge of the fan-shaped plate (211) with gear teeth constitutes the driven meshing component.

8. The three-position isolating grounding switch assembly according to claim 7, characterized in that, The two opposing frame parts of the U-shaped frame are both fan-shaped plates (211), and the central angles of the two fan-shaped plates (211) are both 90° and have two vertical sides. The bottom side of the U-shaped frame is perpendicular to one of the vertical sides of the fan-shaped plate (211).

9. The three-position isolating grounding switch assembly according to claim 8, characterized in that, Both support frames (210) are rotatably mounted with pinions (216). Both pinions (216) are located directly below the rotation axis and mesh with the arc-shaped transmission racks (2110) on the corresponding sector plates (211). The output end of the drive motor (219) extends toward one of the support frames (210) and is connected to the pinion (216) on that support frame (210) for transmission.

10. The three-position isolating grounding switch assembly according to any one of claims 6-9, characterized in that, The bottom edge of the U-shaped frame includes an annular flange (212) and a connecting elbow (213) symmetrically fixed to the outside of the annular flange (212). The connecting elbow (213) is fixedly connected to the two frame parts opposite to the U-shaped frame, and the annular flange (212) constitutes the fixed structure.

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