Multifunctional operating handle of power distribution switch

Abstract

The invention discloses a multifunctional operating handle of a power distribution switch. The multifunctional operating handle comprises a crank and a plurality of operating joints, the crank comprises an arch-shaped transmission rod, a handle and a connecting piece, the connecting piece is arranged at the first end of the arch-shaped transmission rod, the handle is arranged at the second end of the arch-shaped transmission rod, the operation connector comprises an operation part and a connecting part, the connecting part is detachably connected with the connecting piece, and the operation part comprises two operation heads. The multifunctional operating handle of the power distribution switch has the advantages that the handle adapts to various types of operating joints, and the operating efficiency is high.

Description

Technical Field

[0001] This invention relates to the field of electrical engineering switchgear technology, and in particular to a multi-functional operating handle for a power distribution switch. Background Technology

[0002] In the operation and maintenance of power systems, routine inspections, maintenance, equipment replacement and modification, and defect handling of power equipment often involve power outages and load switching operations on transmission and distribution equipment. Because transmission and distribution equipment of different voltage levels is equipped with circuit breakers and grounding switches from different manufacturers, of different models, and with different operating methods, there is a wide variety of operating handles available.

[0003] In the current operating tool system, each type of circuit breaker and grounding switch requires a dedicated operating handle. Operators must carry multiple types of operating handles, other tools, and protective equipment when performing power outages, restorations, and load switching operations, resulting in low work efficiency and a heavy workload for operators. To solve this problem, a multi-functional operating handle for power distribution switches is being developed. Summary of the Invention

[0004] This invention is based on the inventor's discovery and understanding of the following facts and problems: multiple types of operating handles are required during operation. This invention aims to at least partially solve one of the technical problems in related art. Therefore, embodiments of this invention propose a multi-functional operating handle for power distribution switches, which has the advantages of adapting to multiple types of operating connectors and high operating efficiency.

[0005] According to an embodiment of the present invention, a multi-functional operating handle for a power distribution switch includes a crank and multiple operating connectors. The crank includes an arc-shaped transmission rod, a handle, and a connector. The connector is disposed at a first end of the arc-shaped transmission rod, and the handle is disposed at a second end of the arc-shaped transmission rod. The operating connector includes an operating part and a connecting part. The connecting part is detachably connected to the connector, and the operating part includes two operating heads.

[0006] The multi-functional operating handle for power distribution switches according to embodiments of the present invention has the advantages of adapting to multiple types of operating connectors and high operating efficiency. This application has the following advantages: the operating connectors adopt modular quick-release connectors, making replacement and carrying convenient; the operating handle has a wide range of adaptability, requiring only a single handle and a few connectors to operate circuit breakers and grounding switches of different models, manufacturers, and voltage levels.

[0007] In some embodiments, the operating connectors include a circuit breaker rocking-in / rocking-out connector, a circuit breaker energy storage connector, and a circuit breaker grounding switch connector.

[0008] In some embodiments, the circuit breaker rocking-in / rocking-out connector includes a first operating head with a regular hexagonal cross-section and a second operating head with a sleeve having a rectangular hole, wherein the first operating head and the second operating head are arranged symmetrically.

[0009] In some embodiments, the circuit breaker energy storage connector includes a third operating head with a sleeve having a circular hole, the first end of the sleeve having the circular hole being provided with a positioning groove, the positioning groove extending in a direction perpendicular to the axial direction of the circular hole and at least partially intersecting the circular hole.

[0010] In some embodiments, the circuit breaker grounding switch connector includes a fourth operating head with a regular hexagonal cross-section and a fifth operating head with a sleeve having a regular hexagonal hole. At least a portion of the fourth operating head can enter the regular hexagonal hole of the fifth operating head, and the fourth operating head and the fifth operating head are arranged symmetrically.

[0011] In some embodiments, the connecting part is a rectangular block, a locking hole is provided on the rectangular block, an elastic element is arranged in the locking hole, the elastic element is connected to the locking steel ball, and at least a portion of the locking steel ball is located in the locking hole.

[0012] In some embodiments, the end of the connector is provided with a rectangular hole that matches the rectangular block, and a positioning groove is provided on the wall of the rectangular hole to accommodate at least a portion of the locking steel ball.

[0013] In some embodiments, a limiter is further included, the limiter comprising a first transmission cylinder, a second transmission cylinder, a permanent magnet, and an electromagnet, the permanent magnet being arranged inside the first transmission cylinder, the electromagnet being arranged inside the second transmission cylinder, the first transmission cylinder being sleeved inside the second transmission cylinder, the electromagnet being magnetically attracted to the permanent magnet, the first transmission cylinder being connected to the connecting member, and the second transmission cylinder being connected to the bow-shaped transmission rod.

[0014] In some embodiments, a polytetrafluoroethylene guide ring is provided between the inner wall of the first transmission cylinder and the outer wall of the second transmission cylinder, and a torque sensor is arranged on the second transmission cylinder. The electromagnet is de-energized after the torque exceeds a set threshold.

[0015] In some embodiments, a sheath is also included, which is fitted over the middle portion of the bow-shaped drive rod. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the multi-functional operating handle of the power distribution switch according to an embodiment of the present invention.

[0017] Figure 2This is a schematic diagram of the structure of the first operating head of the multi-functional operating handle of the power distribution switch according to an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the structure of the second operating head of the multi-functional operating handle of the power distribution switch according to an embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the structure of the third operating head of the multi-functional operating handle of the power distribution switch according to an embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram of the circuit breaker grounding switch connector of the multi-functional operating handle of the power distribution switch according to an embodiment of the present invention.

[0021] Reference numerals: 1. Crank handle; 101. Bow-shaped transmission rod; 102. Handle; 103. Connector; 2. Operating joint; 201. Operating part; 202. Connecting part; 3. Sheath. Detailed Implementation

[0022] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] According to an embodiment of the present invention, a multi-functional operating handle for a power distribution switch includes a crank 1 and multiple operating connectors 2. The crank 1 includes an arc-shaped transmission rod 101, a handle 102, and a connector 103. The connector 103 is disposed at a first end of the arc-shaped transmission rod 101, and the handle 102 is disposed at a second end of the arc-shaped transmission rod 101. The operating connectors 2 include an operating part 201 and a connecting part 202. The connecting part 202 is detachably connected to the connector 103. The operating part 201 includes two operating heads.

[0024] The crank handle 1's arc-shaped transmission rod 101 adopts an arc design, optimizing the force transmission path and making it easier for the operator to turn, effectively reducing operational intensity. The handle 102 is located at the second end of the arc-shaped transmission rod 101, conforming to ergonomics, facilitating stable grip and application of force, improving operational comfort and stability. The connector 103 is located at the first end of the arc-shaped transmission rod 101, providing structural support for the connection between the crank handle 1 and the operating connector 2. The connecting part 202 of the operating connector 2 is detachably connected to the connector 103, allowing the operator to quickly change the adapter connector according to different types of operating parts 201 of the power distribution switch, eliminating the need to carry multiple tools, greatly improving operational flexibility and versatility, and reducing tool carrying and management costs. The two operating heads of the operating part 201 can be adapted to two different specifications or types of operating points on the power distribution switch, expanding the applicability of a single operating connector 2, reducing the frequency of connector replacement, and improving operational efficiency.

[0025] In some embodiments, the operating connector 2 includes a circuit breaker rocking-in / rocking-out connector, a circuit breaker energy storage connector, and a circuit breaker grounding switch connector.

[0026] Specifically, the circuit breaker's rocking-in / rocking-out connector is designed for the pulling action of the circuit breaker body and cabinet. The size and tooth profile of the operating head match the rocking-in / rocking-out mechanism, ensuring stable force transmission, preventing slippage and jamming during operation, improving the accuracy of the circuit breaker's pull-in / pull-out, and reducing mechanical wear. The circuit breaker's energy storage connector is adapted to the power input interface of the energy storage mechanism. It can use a high-hardness alloy material for the operating head and optimize the torque transmission structure, ensuring a stable output of the torque required for energy storage and preventing the circuit breaker from failing to open or close properly due to insufficient energy storage. The circuit breaker's grounding switch connector has an insulating coating on its surface, reducing the risk of electric shock during operation and ensuring the standardization and safety of grounding operations.

[0027] In some embodiments, the circuit breaker rocking-in / rocking-out connector includes a first operating head with a regular hexagonal cross-section and a second operating head with a sleeve having a rectangular hole, the first operating head and the second operating head being arranged symmetrically.

[0028] Specifically, the hexagonal cross-section features multi-faceted contact, increasing the contact area during torque transmission and preventing slippage and force misalignment during operation, thus ensuring the stability and accuracy of force transmission during circuit breaker operation. The second operating head features a sleeve structure with a rectangular hole, compatible with rectangular operating rods or boss-like interfaces in the rocker-in / rocker-out mechanism. The sleeve's enveloping fit enhances the connection's firmness during operation. The symmetrical arrangement of the two operating heads eliminates the need for operators to flip handle 102 or adjust their grip when switching between different interface types; simply rotating the connector allows for quick switching. This is particularly beneficial in confined spaces such as inside distribution cabinets, significantly reducing operational movements and improving ease of use. Simultaneously, the symmetrical structure ensures more even force distribution across the connector, preventing localized wear caused by prolonged use of a single operating head and extending the connector's lifespan.

[0029] In some embodiments, the circuit breaker energy storage connector includes a third operating head with a sleeve having a circular hole. The first end of the sleeve with the circular hole is provided with a positioning groove, the extending direction of which is perpendicular to the axial direction of the circular hole and at least part of which intersects with the circular hole.

[0030] Specifically, the sleeve structure with a circular hole can form a wrapping fit with the circular operating shaft in the energy storage mechanism of the power distribution switch, improving coaxiality and connection strength during operation, avoiding eccentric force during torque transmission, and ensuring stable output. The positioning groove at the first end of the sleeve extends perpendicularly to the axial direction of the circular hole and at least partially intersects it, fitting a positioning boss on the energy storage operating shaft. The engagement of the boss and groove achieves circumferential positioning, effectively preventing slippage or free rotation of the sleeve relative to the operating shaft during operation. Especially in scenarios requiring continuous application of large torque, it locks the torque transmission path, ensuring the continuity and fullness of the energy storage process and preventing wear due to force deviation. The partial intersection of the positioning groove and the circular hole does not affect the smooth insertion of the sleeve into the operating shaft and further disperses force through multi-point contact between the boss and the groove, reducing localized wear. Stable positioning can be achieved as long as the boss size is within the groove's fitting range, improving the compatibility of the connector with different equipment. The groove edges are rounded and chamfered, making it easy to quickly align with the boss and complete the fitting during operation, reducing the difficulty of operation in narrow spaces.

[0031] In some embodiments, the circuit breaker grounding switch connector 2 includes a fourth operating head with a regular hexagonal cross-section and a fifth operating head with a sleeve having a regular hexagonal hole. At least a portion of the fourth operating head can enter the regular hexagonal hole of the fifth operating head, and the fourth operating head and the fifth operating head are arranged symmetrically.

[0032] Specifically, the hexagonal cross-section structure, with its multi-faceted contact characteristics, increases the contact area during torque transmission, preventing slippage and force shift during operation, ensuring stable torque transmission during grounding operations, and guaranteeing reliable opening and closing of the grounding switch. The fifth operating head can form a wrap-around fit with the hexagonal concave interface of the grounding switch. The complete fit between the inner wall of the sleeve and the interface further enhances the connection's firmness, preventing operational failures due to loose interfaces. The fourth operating head nesting into the fifth operating head achieves a nested storage function for the two operating heads, reducing the space occupied by the connector when not in use, facilitating organization and storage in the tool bag, and preventing individual operating heads from being damaged by impacts due to exposure. In the nested state, the overall structure of the connector is more compact, reducing the risk of bumps and knocks during transport.

[0033] In some embodiments, the connecting part 202 is a rectangular block with a locking hole. An elastic element is arranged inside the locking hole and connected to a locking steel ball. At least a portion of the locking steel ball is located inside the locking hole.

[0034] Specifically, the connecting part 202 uses a rectangular block to guide and position the connecting piece 103 of the crank handle 1, preventing circumferential rotational offset during joint installation and ensuring the coaxiality of the operating head and the corresponding operating mechanism of the power distribution switch. Simultaneously, the rectangular surface contact enhances overall stability after connection, reduces wobbling caused by gaps during torque transmission, and improves operating accuracy. The locking hole provides installation space for the elastic element and locking ball. The elastic element continuously provides outward elastic force to the locking ball, allowing the ball to partially pop out of the locking hole and embed into the corresponding locking groove of the connecting piece 103 during joint and connecting piece assembly. This quickly achieves circumferential and axial locking, eliminating the need for additional locking components and significantly improving the convenience of joint replacement. The locking ball's location within the locking hole effectively limits its ejection stroke, preventing complete ejection and loss or jamming. It also ensures the fit between the ball and the locking groove of the connecting piece 103, preventing accidental joint detachment due to vibration or collision during operation. The elastic element is a spring with high elastic fatigue strength, which can withstand repeated compression and rebound for a long time, thus extending the service life of the locking structure.

[0035] In some embodiments, the end of the connector 103 is provided with a rectangular hole that matches the rectangular block, and a positioning groove is provided on the wall of the rectangular hole to accommodate at least part of the locking steel ball.

[0036] Specifically, the rectangular hole and the rectangular block of the connecting part 202 form a precise shape fit. The circumferential limit of the rectangular structure restricts the rotation of the connector relative to the connecting part 103. Combined with the axial locking effect of the locking steel ball and the positioning groove, the connector and the connecting part 103 are fixed, improving the stability of the connection structure and the reliability of torque transmission. This avoids force transmission deviation or equipment wear caused by loosening or rotation of the connector during operation. The wall size of the rectangular hole matches the outer size of the rectangular block, minimizing the fit clearance and reducing wobbling during torque transmission. This ensures the coaxiality of the operating head and the power distribution switch operating mechanism, improving operating accuracy. The positioning groove on the wall of the rectangular hole fits snugly with the locking steel ball. The curvature design of the groove is consistent with the surface curvature of the steel ball, which increases the contact area between the two, disperses the force during locking, and prevents deformation or wear of the steel ball due to local stress concentration after long-term use. The elastic element drives the steel ball to embed into the groove, so that the connector can be locked by pressing with axial force during assembly. When disassembling, applying a reverse pull force allows the steel ball to squeeze the elastic element to achieve separation, making the operation convenient and efficient.

[0037] In some embodiments, a limiter is also included, which includes a first transmission cylinder, a second transmission cylinder, a permanent magnet, and an electromagnet. The permanent magnet is arranged inside the first transmission cylinder, and the electromagnet is arranged inside the second transmission cylinder. The first transmission cylinder is sleeved inside the second transmission cylinder. The electromagnet and the permanent magnet are magnetically attracted to each other. The first transmission cylinder is connected to the connector 103, and the second transmission cylinder is connected to the bow-shaped transmission rod 101.

[0038] Specifically, the nested arrangement of the first and second transmission cylinders ensures their coaxiality, preventing eccentricity during torque transmission and ensuring a stable force transmission path. Simultaneously, the nested structure provides enclosed protection for the permanent magnet and electromagnet, reducing the corrosion of magnetic components by external dust and moisture, and extending the lifespan of the limiter. The layout, with the permanent magnet fixed inside the first transmission cylinder and the electromagnet arranged inside the second transmission cylinder, maximizes the magnetic adsorption area, improving the stability of the magnetic force and the efficiency of torque transmission. Torque can be transmitted sequentially from the bow-shaped transmission rod 101 to the second transmission cylinder, the first transmission cylinder, the connector 103, and the operating joint 2 via magnetic attraction, achieving stable transmission. The electromagnet and the permanent magnet are magnetically attracted to each other, providing adjustable overload protection. During normal operation, the electromagnet generates a strong magnetic attraction when energized, which tightly engages with the permanent magnet to ensure stable torque transmission. When the operating torque exceeds the preset safety threshold (such as in case of mechanism jamming, overload, or other abnormal situations), the power supply to the electromagnet can be cut off through the control system, causing the magnetic attraction to disappear quickly. The first and second transmission cylinders lose the transmission force and slip relative to each other, preventing excessive torque from causing mechanical damage to the power distribution switch operating mechanism, operating head, or crank 1. It also prevents the operator from being accidentally injured by the rebound of the handle 102 due to sudden torque changes. After overload slippage, normal operation can be restored simply by re-energizing the electromagnet, making operation convenient.

[0039] In some embodiments, a polytetrafluoroethylene guide ring is provided between the inner wall of the first transmission cylinder and the outer wall of the second transmission cylinder, and a torque sensor is arranged on the second transmission cylinder. The electromagnet is de-energized after the torque exceeds a set threshold.

[0040] Specifically, utilizing the low coefficient of friction, high wear resistance, and excellent chemical stability of polytetrafluoroethylene (PTFE), the nested fit of the two transmission cylinders is precisely guided, enhancing their coaxiality and preventing localized wear caused by eccentricity during torque transmission and overload slippage. It also significantly reduces frictional resistance during relative rotation, making relative movement smoother during normal transmission or overload protection, thus reducing mechanical losses. The guide ring also fills the tiny gap between the two cylinders, preventing external dust and moisture from entering the magnetic component area. Combined with the enclosed nested structure, this extends the service life of the permanent magnet, electromagnet, and transmission cylinder. The torque sensor arranged on the second transmission cylinder can accurately collect dynamic torque data during the operation of the handle 102 in real time. When the torque sensor detects that the value exceeds the preset threshold, it can quickly trigger the electromagnet to cut off the power, so that the magnetic attraction between the permanent magnet and the electromagnet disappears instantly. The first transmission cylinder and the second transmission cylinder immediately slip relative to each other, and the torque transmission is cut off at the moment of overload. This minimizes the mechanical damage such as deformation and breakage of the power distribution switch operating mechanism, operating connector 2 or crank handle 1 due to excessive force, and prevents personal injury to the operator caused by the sudden rebound of the handle 102.

[0041] In some embodiments, a sheath is also included, which is fitted over the middle of the bow-shaped transmission rod 101.

[0042] Specifically, a protective sleeve is fitted over the middle of the bow-shaped transmission rod 101. The sleeve is made of insulating and non-slip material (such as rubber or silicone), and its surface can be textured to conform to the curvature of the hand. This enhances friction during grip, preventing the handle 102 from slipping when applying force, and also cushions operational vibrations, reducing hand fatigue during prolonged use. The insulating properties improve electrical safety of the handle 102, preventing the risk of electric shock due to accidental leakage when the operator touches the bow-shaped transmission rod 101. The sleeve provides physical protection for the middle of the bow-shaped transmission rod 101, reducing collisions and wear between the rod and the electrical cabinet, tools, etc., during operation, preventing dust and oil from adhering, delaying corrosion and aging of the rod, and extending the service life of the bow-shaped transmission rod 101.

[0043] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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 this invention and simplifying the description, and are not intended to 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 this invention.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0048] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A multi-functional operating handle for a power distribution switch, characterized in that, include: A crank handle, comprising a bow-shaped transmission rod, a handle, and a connector, wherein the connector is disposed at a first end of the bow-shaped transmission rod, and the handle is disposed at a second end of the bow-shaped transmission rod; Multiple operating connectors, each operating connector including an operating part and a connecting part, the connecting part being detachably connected to the connector, the operating part including two operating heads.

2. The multi-functional operating handle for a power distribution switch according to claim 1, characterized in that, The operating connectors include circuit breaker swing-in / swing-out connectors, circuit breaker energy storage connectors, and circuit breaker grounding switch connectors.

3. The multi-functional operating handle for a power distribution switch according to claim 2, characterized in that, The circuit breaker rocking-in / rocking-out connector includes a first operating head with a regular hexagonal cross-section and a second operating head with a sleeve having a rectangular hole. The first operating head and the second operating head are arranged symmetrically.

4. The multi-functional operating handle for a power distribution switch according to claim 2, characterized in that, The circuit breaker energy storage connector includes a third operating head with a sleeve having a circular hole. The first end of the sleeve with the circular hole is provided with a positioning groove. The extending direction of the positioning groove is perpendicular to the axial direction of the circular hole, and at least part of the positioning groove intersects with the circular hole.

5. The multi-functional operating handle for a power distribution switch according to claim 2, characterized in that, The circuit breaker grounding switch connector includes a fourth operating head with a regular hexagonal cross-section and a fifth operating head with a sleeve having a regular hexagonal hole. At least part of the fourth operating head can enter the regular hexagonal hole of the fifth operating head. The fourth operating head and the fifth operating head are arranged symmetrically.

6. The multi-functional operating handle for a power distribution switch according to claim 1, characterized in that, The connecting part is a rectangular block with a locking hole. An elastic element is arranged in the locking hole and connected to the locking steel ball. At least part of the locking steel ball is located in the locking hole.

7. The multi-functional operating handle for a power distribution switch according to claim 1, characterized in that, The end of the connector is provided with a rectangular hole that matches the rectangular block. A positioning groove is provided on the wall of the rectangular hole to accommodate at least a portion of the locking steel ball.

8. The multi-functional operating handle for a power distribution switch according to claim 1, characterized in that, It also includes a limiter, which comprises a first transmission cylinder, a second transmission cylinder, a permanent magnet, and an electromagnet. The permanent magnet is arranged inside the first transmission cylinder, and the electromagnet is arranged inside the second transmission cylinder. The first transmission cylinder is sleeved inside the second transmission cylinder. The electromagnet and the permanent magnet are magnetically attracted to each other. The first transmission cylinder is connected to the connecting member, and the second transmission cylinder is connected to the bow-shaped transmission rod.

9. The multi-functional operating handle for a power distribution switch according to claim 8, characterized in that, A polytetrafluoroethylene guide ring is provided between the inner wall of the first transmission cylinder and the outer wall of the second transmission cylinder. A torque sensor is arranged on the second transmission cylinder. The electromagnet is de-energized when the torque exceeds a set threshold.

10. The multi-functional operating handle for a power distribution switch according to claim 1, characterized in that, It also includes a sheath, which is fitted over the middle of the bow-shaped transmission rod.

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