Rotating shaft of four-pole switch

Abstract

The invention discloses a rotating shaft of a four-pole switch, which comprises a third rotating shaft piece, a first rotating shaft piece, a second rotating shaft piece and a fourth rotating shaft piece which are connected in sequence, and is characterized in that the first rotating shaft piece is connected with the second rotating shaft piece through a rotating shaft insert; the third rotating shaft piece, the first rotating shaft piece, the second rotating shaft piece and the fourth rotating shaft piece are internally provided with conductive shafts which do not make contact with one another, and the third rotating shaft piece, the first rotating shaft piece, the second rotating shaft piece and the fourth rotating shaft piece are each provided with a conductive opening communicating with the conductive shafts and a plurality of conductive grooves close to the conductive opening. And the conductive shafts in the third rotating shaft piece, the first rotating shaft piece, the second rotating shaft piece and the fourth rotating shaft piece are electrically connected. According to the rotating shaft, the electrical isolation performance in the rotating shaft of the four-pole switch is remarkably improved while the transmission continuity and synchronism of a mechanism are ensured, the safety and reliability of the whole switch in a high-voltage and high-current application scene are improved, and an enforceable structural scheme is provided for miniaturization and high performance of the switch.

Description

Technical Field

[0001] This application relates to the field of switch technology, specifically to the shaft of a four-pole switch. Background Technology

[0002] Currently, four-pole switches used in high-voltage, high-current applications typically employ an integral through-shaft structure. A mechanism drives the shaft to rotate, thereby actuating the contacts of each pole to perform closing and opening actions. However, with the continuous miniaturization of switches and limited installation space, the internal space of the integral through-shaft for electrical isolation is limited. The electrical clearance and creepage distance between conductive shafts are easily constrained by structural features such as the shaft diameter and shaft hole size, making it difficult to meet higher withstand voltage requirements within a limited space. Especially under high-voltage conditions, if the insulating sleeve or isolating component is subjected to heat aging, moisture, or dust contamination, it can easily lead to partial discharge, breakdown, or even failure, affecting the switch's operational reliability and service life.

[0003] Therefore, how to improve the electrical clearance and pressure resistance between the conductive shafts inside the four-pole switch shaft without significantly increasing the structural size or reducing the transmission stability, while also taking into account the synchronization and reliability of the mechanism transmission, has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0004] To address the aforementioned issues, this application provides a shaft for a four-pole switch. This shaft, while ensuring the continuity and synchronization of the mechanism's transmission, significantly improves the electrical isolation performance within the shaft of the four-pole switch, enhancing the overall safety and reliability of the switch in high-voltage, high-current applications. It also provides an feasible structural solution for the miniaturization and high-performance of switches.

[0005] This application provides a rotating shaft for a four-pole switch, comprising a third rotating shaft, a first rotating shaft, a second rotating shaft, and a fourth rotating shaft connected in sequence. The first rotating shaft and the second rotating shaft are connected by a rotating shaft insert. Each of the third, first, second, and fourth rotating shafts has a non-contacting conductive shaft. Each of the third, first, second, and fourth rotating shafts has a conductive port connecting to the conductive shaft and several conductive grooves near the conductive port. The conductive shafts within the third, first, second, and fourth rotating shafts are electrically connected. The creepage path of the electrical connection between adjacent conductive shafts is as follows: from the surface of one conductive shaft, sequentially through the inner wall of the conductive port connecting to that conductive shaft, the inner wall of several conductive grooves, the inner wall of the conductive port connecting to another conductive shaft, to the surface of the other conductive shaft.

[0006] In one embodiment of this application, a first shaft platform is provided on the side of the first rotating shaft member near the second rotating shaft member, and the first shaft platform is provided with a first shaft platform groove; a second shaft platform is provided on the side of the second rotating shaft member near the first rotating shaft member, and the second shaft platform is provided with a second shaft platform groove; the rotating shaft insert includes an insert shaft platform, and a first insert boss and a second insert boss provided on both sides of the insert shaft platform, the first insert boss cooperating with the first shaft platform groove, the second insert boss cooperating with the second shaft platform groove, and the first rotating shaft member and the second rotating shaft member rotating synchronously through the rotating shaft insert.

[0007] In one embodiment of this application, the first insert boss is embedded in the first shaft platform groove and the two form a cross-shaped structure, and the second insert boss is embedded in the second shaft platform groove and the two form a cross-shaped structure.

[0008] In one embodiment of this application, a first through hole for mounting a conductive shaft is provided in the first shaft base groove of the first rotating shaft member and in the third rotating shaft member; a second through hole for mounting a conductive shaft is provided in the second shaft base groove of the second rotating shaft member and in the fourth rotating shaft member; a third shaft base is provided between the third rotating shaft member and the first rotating shaft member, and the third shaft base is used to isolate the first through hole in the third rotating shaft member from the first rotating shaft member; a fourth shaft base is provided between the fourth rotating shaft member and the second rotating shaft member, and the fourth shaft base is used to isolate the second through hole in the fourth rotating shaft member from the second rotating shaft member.

[0009] In one embodiment of this application, a third sealing surface is provided near the first through hole in the third rotating shaft, a first sealing surface is provided near the first through hole in the first rotating shaft, a second sealing surface is provided near the second through hole in the second rotating shaft, and a fourth sealing surface is provided near the second through hole in the fourth rotating shaft; the conductive shaft in the third rotating shaft abuts against the third sealing surface, the conductive shaft in the first rotating shaft abuts against the first sealing surface, the conductive shaft in the second rotating shaft abuts against the second sealing surface, and the conductive shaft in the fourth rotating shaft abuts against the fourth sealing surface.

[0010] In one embodiment of this application, the conductive shafts within the third, first, second, and fourth rotating shafts are coaxial.

[0011] In one embodiment of this application, the first insert boss is provided with a first recessed surface, and one end of the conductive shaft in the first rotating shaft is embedded in the first recessed surface; the second insert boss is provided with a second recessed surface, and one end of the conductive shaft in the second rotating shaft is embedded in the second recessed surface.

[0012] In one embodiment of this application, the third rotating shaft and the first rotating shaft are an integral structure, and the second rotating shaft and the fourth rotating shaft are an integral structure.

[0013] In one embodiment of this application, the third rotating shaft is connected to the first rotating shaft via a plug-in transmission connection, and the second rotating shaft is connected to the fourth rotating shaft via a plug-in transmission connection.

[0014] In one embodiment of this application, a fifth shaft platform is provided on the side of the third rotating shaft facing the first rotating shaft and on the side of the fourth rotating shaft facing the second rotating shaft, and the fifth shaft platform is provided with a boss; a sixth shaft platform is provided on the side of the first rotating shaft facing the third rotating shaft and on the side of the second rotating shaft facing the fourth rotating shaft, and the sixth shaft platform is provided with a sixth shaft platform groove; the boss of the third rotating shaft engages with the sixth shaft platform groove of the first rotating shaft to form a plug-in transmission connection between the third rotating shaft and the first rotating shaft, and the boss of the fourth rotating shaft engages with the sixth shaft platform groove of the second rotating shaft to form a plug-in transmission connection between the fourth rotating shaft and the second rotating shaft.

[0015] The beneficial effects of this application are: 1. This shaft significantly increases the electrical clearance and creepage distance between conductive shafts, effectively solving the problem of limited internal electrical isolation in integral shafts, improving the level of internal electrical isolation, and reducing the risk of breakdown and flashover under high voltage conditions.

[0016] 2. This shaft facilitates miniaturization design, eliminating the need for additional insulating sleeves or reinforced isolation housings, and achieving a larger equivalent electrical clearance, allowing the device to meet high pressure requirements even under size constraints.

[0017] 3. The segmented structure of the rotating shaft makes it easier to control the machining accuracy. The conductive shaft can be installed, inspected and replaced in sections, reducing the complexity of manufacturing and maintenance. The enclosed cavity structure can reduce the impact of dust and moisture on the insulating components and reduce the degradation of switch life due to environmental stress.

[0018] 4. The internal structure of the shaft is reconstructed, and the original continuous shaft is segmented at the shaft platform position. A closed cavity with independent conductive shafts is formed inside the shaft. Synchronous transmission and axial limiting of the segmented shaft are achieved through shaft inserts with non-circular symmetry structure. Without relying on additional insulating transmission components, the phase-to-phase electrical clearance and creepage distance are increased from the structural level.

[0019] In summary, the four-pole switch shaft provided in this application is a two-section structure consisting of a first shaft component and a second shaft component, created by cutting the original integral four-pole switch shaft at the intermediate shaft platform. To ensure reliable connection and synchronous rotation of the segmented shafts during transmission, grooves are provided on the cross-sections of the first and second shaft platforms. Precise engagement and torque transmission between the first and second shaft components are achieved through mating shaft inserts. Through this segmented design, the original through-hole conductive shaft is effectively cut off and sealed, forming independent conductive shaft cavities within each shaft component. This significantly increases the axial and radial electrical clearances between the conductive shafts, solving problems such as limited clearance, insufficient creepage distance, and sensitivity to insulation aging inherent in traditional insulation-sleeve isolation methods. Simultaneously, the shaft inserts serve the dual functions of torque transmission and axial limiting, ensuring continuous transmission, minimal clearance, and high synchronization of the mechanism. Through the above design, the shaft of the four-pole switch provided in this application not only ensures the continuity and synchronization of the mechanism transmission, but also significantly improves the electrical isolation performance inside the shaft of the four-pole switch, enhances the safety and reliability of the overall switch in high-voltage and high-current application scenarios, and provides an feasible structural solution for the miniaturization and high performance of the switch. Attached Figure Description

[0020] Figure 1 This is a 3D diagram of the shaft of an existing four-pole switch.

[0021] Figure 2 This is a cross-sectional view of the shaft of an existing four-pole switch.

[0022] Figure 3 This is an exploded view of the shaft of the four-pole switch of this application.

[0023] Figure 4 This is a perspective view of the shaft of the four-pole switch of this application.

[0024] Figure 5 This is a cross-sectional view of the shaft of the four-pole switch of this application.

[0025] Figure 6 This is a perspective view of the first and third rotating shaft components of this application.

[0026] Figure 7 This is a cross-sectional view of the first and third rotating shaft components of this application.

[0027] Figure 8 This is a perspective view of the second and fourth rotating shaft components of this application.

[0028] Figure 9 This is a cross-sectional view of the second and fourth rotating shafts of this application.

[0029] Figure 10 This is a schematic diagram of the structure of the pivot insert of this application.

[0030] Figure 11 This is a cross-sectional view of the pivot insert of this application.

[0031] Figure 12 This is a three-dimensional view of the conductive axis of this application.

[0032] Figure 13 This is a schematic diagram of the creepage distance of the shaft of the four-pole switch of this application.

[0033] Figure 14 This is a schematic diagram of the structure of the rotating shaft of a four-pole switch according to another embodiment of this application.

[0034] Figure 15 This is a schematic diagram of the creepage distance of the shaft of a four-pole switch according to another embodiment of this application.

[0035] In the diagram: 1. First rotating shaft; 10. First shaft platform; 11. First shaft platform groove; 110. First through hole; 12. Third shaft platform; 120. Third closed surface; 121. First closed surface; 2. Second rotating shaft; 20. Second shaft platform; 21. Second shaft platform groove; 210. Second through hole; 22. Fourth shaft platform; 220. Second closed surface; 221. Fourth closed surface; 3. Rotating shaft insert; 30. Insert shaft platform; 31. First insert boss; 310. First recessed surface; 32. Second insert boss; 320. Second recessed surface; 4. Conductive shaft; 5. Integral four-pole switch rotating shaft; 50. Intermediate shaft platform; 51. Through-type conductive shaft hole; 6. Third rotating shaft; 61. Fifth shaft platform; 62. Boss; 7. Fourth rotating shaft; 8. Conductive port; 9. Conductive groove; 101. Sixth shaft platform; 102. Sixth shaft platform groove. Detailed Implementation

[0036] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and 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, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] like Figures 1 to 13 As shown, this application provides a rotating shaft for a four-pole switch. In some embodiments, the rotating shaft of the four-pole switch includes a third rotating shaft 6, a first rotating shaft 1, a second rotating shaft 2, and a fourth rotating shaft 7 connected in sequence. The first rotating shaft 1 and the second rotating shaft 2 are connected by a rotating shaft insert 3. Each of the third rotating shaft 6, the first rotating shaft 1, the second rotating shaft 2, and the fourth rotating shaft 7 has a non-contacting conductive shaft 4. Each of the rotating shaft components 7 is provided with a conductive port 8 connecting to the conductive shaft 4 and several conductive grooves 9 near the conductive port 8. The conductive shafts 4 in the third rotating shaft component 6, the first rotating shaft component 1, the second rotating shaft component 2, and the fourth rotating shaft component 7 are electrically connected. The creepage path of the electrical connection between adjacent conductive shafts 4 is as follows: from the surface of one conductive shaft 4, it passes sequentially through the inner wall of the conductive port 8 connecting to the conductive shaft 4, the inner wall of several conductive grooves 9, the inner wall of the conductive port 8 connecting to another conductive shaft 4, to the surface of the other conductive shaft 4.

[0040] In some embodiments, the first rotating shaft 1 is provided with a first shaft platform 10 on the side near the second rotating shaft 2, and the first shaft platform 10 is provided with a first shaft platform groove 11; the second rotating shaft 2 is provided with a second shaft platform 20 on the side near the first rotating shaft 1, and the second shaft platform 20 is provided with a second shaft platform groove 21; the rotating shaft insert 3 includes an insert shaft platform 30, and a first insert boss 31 and a second insert boss 32 provided on both sides of the insert shaft platform 30, the first insert boss 31 cooperates with the first shaft platform groove 11, and the second insert boss 32 cooperates with the second shaft platform groove 21, and the first rotating shaft 1 and the second rotating shaft 2 rotate synchronously through the rotating shaft insert 3.

[0041] Optionally, the first insert boss 31 is embedded in the first shaft platform groove 11 and the two form a cross-shaped structure, and the second insert boss 32 is embedded in the second shaft platform groove 21 and the two form a cross-shaped structure.

[0042] Optionally, a first through hole 110 for mounting the conductive shaft 4 is provided in the first shaft base groove 11 of the first rotating shaft 1 and in the third rotating shaft 6. A second through hole 210 for mounting the conductive shaft 4 is provided in the second shaft base groove 21 of the second rotating shaft 2 and in the fourth rotating shaft 7. A third shaft base 12 is provided between the third rotating shaft 6 and the first rotating shaft 1. The third shaft base 12 is used to isolate the first through hole 110 in the third rotating shaft 6 from the first through hole 110 in the first rotating shaft 1. A fourth shaft base 22 is provided between the fourth rotating shaft 7 and the second rotating shaft 2. The fourth shaft base 22 is used to isolate the second through hole 210 in the fourth rotating shaft 7 from the second through hole 210 in the second rotating shaft 2.

[0043] Optionally, the third shaft platform 12 is provided with a third sealing surface 120 near the first through hole 110 in the third rotating shaft 6, the third shaft platform 12 is provided with a first sealing surface 121 near the first through hole 110 in the first rotating shaft 1, the fourth shaft platform 22 is provided with a second sealing surface 220 near the second through hole 210 in the second rotating shaft 2, and the fourth shaft platform 22 is provided with a fourth sealing surface 221 near the second through hole 210 in the fourth rotating shaft 7; the conductive shaft 4 in the third rotating shaft 6 abuts against the third sealing surface 120, the conductive shaft 4 in the first rotating shaft 1 abuts against the first sealing surface 121, the conductive shaft 4 in the second rotating shaft 2 abuts against the second sealing surface 220, and the conductive shaft 4 in the fourth rotating shaft 7 abuts against the fourth sealing surface 221.

[0044] Optionally, the conductive shaft 4 within the third rotating shaft 6, the first rotating shaft 1, the second rotating shaft 2, and the fourth rotating shaft 7 is coaxial.

[0045] Optionally, the end faces of the first shaft platform 10, the second shaft platform 20, and the insert shaft platform 30 are flush.

[0046] Optionally, the first insert boss 31 is provided with a first recessed surface 310, and one end of the conductive shaft 4 in the first rotating shaft 1 is embedded in the first recessed surface 310; the second insert boss 32 is provided with a second recessed surface 320, and one end of the conductive shaft 4 in the second rotating shaft 2 is embedded in the second recessed surface 320.

[0047] The rotating shaft of the four-pole switch provided in this application closes the first through hole 110 in the third shaft platform 12 between the third rotating shaft member 6 and the first rotating shaft member 1, forming a third sealing surface 120 and a first sealing surface 121. This isolates and axially limits the conductive shafts 4 on both sides of the third shaft platform 12, preventing movement. It also closes the second through hole 210 in the fourth shaft platform 22 between the second rotating shaft member 2 and the fourth rotating shaft member 7, forming a second sealing surface 220 and a fourth sealing surface 221. This isolates and axially limits the conductive shafts 4 on both sides of the fourth shaft platform 22. The first insert boss 31 and the second insert boss 32, with cross-shaped fan structures on both sides of the insert shaft platform 30, have structural shapes and thicknesses that precisely match the first shaft platform groove 11 and the second shaft platform groove 21, respectively. This allows the rotating shaft insert 3 to be reliably embedded between the first rotating shaft member 1 and the second rotating shaft member 2, achieving a synchronous mechanical connection of the rotating shaft members. Meanwhile, the protruding steps formed on both sides of the conductive port 8 and the conductive groove 9 can significantly increase the spatial electrical clearance between the conductive shafts 4 and reduce the risk of interphase coupling. To prevent the conductive shafts 4 from axially moving, a first recessed surface 310 and a second recessed surface 320 are respectively provided at the center of the first insert boss 31 and the second insert boss 32, which serve as additional limiting structures for the conductive shafts 4.

[0048] like Figures 3 to 13 As shown, in one embodiment, the third rotating shaft 6 and the first rotating shaft 1 are an integral structure, and the second rotating shaft 2 and the fourth rotating shaft 7 are an integral structure.

[0049] like Figure 14 and Figure 15 As shown, in another embodiment, the third rotating shaft 6 is connected to the first rotating shaft 1 by a plug-in transmission connection, and the second rotating shaft 2 is connected to the fourth rotating shaft 7 by a plug-in transmission connection.

[0050] Optionally, the third rotating shaft 6 is provided with a fifth shaft platform 61 on the side facing the first rotating shaft 1 and the fourth rotating shaft 7 is provided with a fifth shaft platform 61, and the fifth shaft platform 61 is provided with a boss 62; the first rotating shaft 1 is provided with a sixth shaft platform 101 on the side facing the third rotating shaft 6 and the second rotating shaft 2 is provided with a sixth shaft platform groove 102; the boss 62 of the third rotating shaft 6 is engaged with the sixth shaft platform groove 102 of the first rotating shaft 1 to form a plug-in transmission connection between the third rotating shaft 6 and the first rotating shaft 1, and the boss 62 of the fourth rotating shaft 7 is engaged with the sixth shaft platform groove 102 of the second rotating shaft 2 to form a plug-in transmission connection between the fourth rotating shaft 7 and the second rotating shaft 2.

[0051] Optionally, the boss 62 and the sixth shaft recess 102 are both in the form of a cross-shaped fan structure.

[0052] In this embodiment, the first and second rotating shafts 1 and 2, located in the middle, are situated in the core area of ​​torque transmission along the entire shaft. Therefore, the shaft insert 3 engages with the first shaft recess 11 on the first rotating shaft 1 and the second shaft recess 21 on the second rotating shaft 2 to achieve coaxial positioning and reliable torque transmission. The third rotating shaft 6 is connected to the first rotating shaft 1 via a plug-in transmission connection, and the second rotating shaft 2 is connected to the fourth rotating shaft 7 via a plug-in transmission connection. The first rotating shaft 1 and the second rotating shaft 2 are connected via the shaft insert 3, ensuring that while each rotating shaft maintains relatively independent assembly, the creepage distance between the conductive shafts 4 is guaranteed, improving electrical isolation performance and achieving synchronous rotation.

[0053] In summary, the shaft of the four-pole switch provided in this application will... Figure 1 and Figure 2The original integral four-pole switch shaft 5 is cut at the intermediate shaft platform 50, dividing it into two sections: a first shaft component 1 and a second shaft component 2. To ensure reliable connection and synchronous rotation of the segmented shafts during transmission, first shaft platform groove 11 and second shaft platform groove 21 are provided on the cross-sections of the first shaft platform 10 and the second shaft platform 20, respectively. Precise engagement and torque transmission between the first shaft component 1 and the second shaft component 2 are achieved through mating shaft inserts 3. Through the segmented design, the original through-hole conductive shaft 51 is rationally cut off and sealed, forming independent closed cavities of conductive shaft 4 within each segment of the shaft component. This significantly increases the axial and radial electrical clearance between the conductive shafts 4, solving problems such as limited clearance, insufficient creepage distance, and sensitivity to insulation aging inherent in traditional insulation sleeve isolation methods. Simultaneously, the shaft insert 3 performs both torque transmission and axial limiting functions, ensuring continuous transmission, small clearance, and high synchronization of the mechanism. Through the above design, the shaft of the four-pole switch provided in this application not only ensures the continuity and synchronization of the mechanism transmission, but also significantly improves the electrical isolation performance inside the shaft of the four-pole switch, enhances the safety and reliability of the overall switch in high-voltage and high-current application scenarios, and provides an feasible structural solution for the miniaturization and high performance of the switch.

[0054] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A rotating shaft for a four-pole switch, characterized in that, The device includes a third rotating shaft, a first rotating shaft, a second rotating shaft, and a fourth rotating shaft connected in sequence. The first rotating shaft and the second rotating shaft are connected by a rotating shaft insert. Each of the third, first, second, and fourth rotating shafts has a non-contacting conductive shaft. Each of the third, first, second, and fourth rotating shafts has a conductive port connecting to the conductive shaft and several conductive grooves near the conductive port. The conductive shafts in the third, first, second, and fourth rotating shafts are electrically connected to each other. The creepage path of the electrical connection between adjacent conductive shafts is as follows: from the surface of one conductive shaft, sequentially through the inner wall of the conductive port connecting to that conductive shaft, the inner wall of several conductive grooves, the inner wall of the conductive port connecting to another conductive shaft, to the surface of the other conductive shaft.

2. The rotating shaft of the four-pole switch according to claim 1, characterized in that, The first rotating shaft has a first shaft platform on the side near the second rotating shaft, and the first shaft platform has a first shaft platform groove; the second rotating shaft has a second shaft platform on the side near the first rotating shaft, and the second shaft platform has a second shaft platform groove; the rotating shaft insert includes an insert shaft platform, and a first insert boss and a second insert boss disposed on both sides of the insert shaft platform, the first insert boss cooperating with the first shaft platform groove, the second insert boss cooperating with the second shaft platform groove, and the first rotating shaft and the second rotating shaft rotate synchronously through the rotating shaft insert.

3. The rotating shaft of the four-pole switch according to claim 2, characterized in that, The first insert boss is embedded in the first shaft platform groove and the two form a cross-shaped structure, and the second insert boss is embedded in the second shaft platform groove and the two form a cross-shaped structure.

4. The rotating shaft of the four-pole switch according to claim 3, characterized in that, The first rotating shaft component and the third rotating shaft component each have a first through hole for mounting a conductive shaft in their first shaft base grooves. The second rotating shaft component and the fourth rotating shaft component each have a second through hole for mounting a conductive shaft in their second shaft base grooves. A third shaft base is provided between the third rotating shaft component and the first rotating shaft component. The third shaft base is used to isolate the first through hole in the third rotating shaft component from the first rotating shaft component. A fourth shaft base is provided between the fourth rotating shaft component and the second rotating shaft component. The fourth shaft base is used to isolate the second through hole in the fourth rotating shaft component from the second rotating shaft component.

5. The rotating shaft of the four-pole switch according to claim 4, characterized in that, The third shaft platform is provided with a third sealing surface near the first through hole in the third rotating shaft component, the third shaft platform is provided with a first sealing surface near the first through hole in the first rotating shaft component, the fourth shaft platform is provided with a second sealing surface near the second through hole in the second rotating shaft component, and the fourth shaft platform is provided with a fourth sealing surface near the second through hole in the fourth rotating shaft component; the conductive shaft in the third rotating shaft component abuts against the third sealing surface, the conductive shaft in the first rotating shaft component abuts against the first sealing surface, the conductive shaft in the second rotating shaft component abuts against the second sealing surface, and the conductive shaft in the fourth rotating shaft component abuts against the fourth sealing surface.

6. The rotating shaft of the four-pole switch according to claim 1, characterized in that, The conductive shafts within the third, first, second, and fourth rotating shafts are coaxial.

7. The rotating shaft of the four-pole switch according to claim 5, characterized in that, The first insert boss is provided with a first recessed surface, and one end of the conductive shaft in the first rotating shaft is embedded in the first recessed surface; the second insert boss is provided with a second recessed surface, and one end of the conductive shaft in the second rotating shaft is embedded in the second recessed surface.

8. The rotating shaft of the four-pole switch according to any one of claims 1-7, characterized in that, The third rotating shaft is an integral structure with the first rotating shaft, and the second rotating shaft is an integral structure with the fourth rotating shaft.

9. The rotating shaft of the four-pole switch according to any one of claims 1-7, characterized in that, The third rotating shaft is connected to the first rotating shaft via a plug-in transmission connection, and the second rotating shaft is connected to the fourth rotating shaft via a plug-in transmission connection.

10. The rotating shaft of the four-pole switch according to claim 9, characterized in that, The third rotating shaft is provided with a fifth shaft platform on the side facing the first rotating shaft and the fourth rotating shaft is provided with a boss on the side facing the second rotating shaft. The first rotating shaft is provided with a sixth shaft platform on the side facing the third rotating shaft and the second rotating shaft is provided with a sixth shaft platform groove. The boss of the third rotating shaft engages with the sixth shaft platform groove of the first rotating shaft to form a plug-in transmission connection between the third rotating shaft and the first rotating shaft. The boss of the fourth rotating shaft engages with the sixth shaft platform groove of the second rotating shaft to form a plug-in transmission connection between the fourth rotating shaft and the second rotating shaft.

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