Electric crank of high-voltage switch cabinet

Abstract

The utility model provides an electric crank of a high-voltage switch cabinet, which belongs to the technical field of auxiliary tools of the high-voltage switch cabinet and comprises a machine body, a motor is arranged in the machine body, a motor rotor is arranged on one side of the motor and coaxially connected with a rotating rod, and the other end of the rotating rod extends out of the outer side of the machine body. A counting sensor connected with the motor is further arranged in the machine body, the counting sensor is in communication connection with a microprocessor, an adapter mounting seat is arranged at the end of the machine body, the mounting seat is detachably connected with an adapter, the rotating rod is rotatably arranged in the adapter mounting seat and the adapter, grips are symmetrically arranged on the two sides of the machine body, and the rotating rod is detachably connected with the rotating rod. A groove convenient for fingers to grasp is formed in the bottom of the grip, a rectangular groove is formed below the tail of the machine body, and a supporting seat is hinged to the edge of the rectangular groove, so that electric shaking can be realized, and the position change of the handcart and the drawer after rotation can be accurately controlled.

Description

Technical Field

[0001] The utility model belongs to the technical field of auxiliary tools for high-voltage switch cabinets, and particularly relates to an electric crank for a high-voltage switch cabinet. Background Art

[0002] A high-voltage switch cabinet is an electrical device mainly composed of a circuit breaker. According to the requirements of the electrical primary wiring diagram, the manufacturer assembles relevant high- and low-voltage electrical appliances, as well as busbars, current-carrying conductors, insulators, etc. in a closed or open switch cabinet body as a device for receiving and distributing electric energy in the power system. The trolley and the drawer are respectively part of the high-voltage switch cabinet and the low-voltage switch cabinet, and are respectively installed with components such as high-voltage circuit breakers, low-voltage circuit breakers, and relays; thus, the trolley-type switch cabinet and the drawer-type switch cabinet are divided; their functions are basically the same as those of the fixed-type switch cabinet. The main difference is for the convenience of maintenance and repair. The trolley and the drawer can be pushed in and pulled out by the crank equipped with the high-voltage switch cabinet; the trolley and the drawer generally have three position states: working, testing, and withdrawing. When the trolley and the drawer are in different positions, different related operations can be performed.

[0003] An operator can use the manual crank equipped with the high-voltage switch cabinet to adjust the positions of the trolley and the drawer; Patent CN 117335305A provides a new type of trolley crank for a 35KV ABB switch cabinet. The operating rod body is a cylindrical operating rod, and the operating rod body includes a first horizontal section, a first vertical section, a second horizontal section, a second vertical section, and a third horizontal section that are integrally connected in sequence. The first vertical section is vertically upward along the end of the first horizontal section, the second horizontal section is horizontally to the right along the end of the first vertical section, the second vertical section is vertically downward along the end of the second horizontal section, the third horizontal section is horizontally to the right along the end of the second vertical section, and insulating sleeves are fixedly sleeved on the second horizontal section and the third horizontal section.

[0004] However, most of the cranks are manually operated by humans. During the cranking process, the situation of not cranking in place or cranking over place may occur, so that the trolley and the drawer cannot accurately reach the specified position and cannot complete the relevant operations. Summary of the Utility Model

[0005] In order to solve the problem that the current manual crank cannot accurately control the rotational adjustment of the trolley and the drawer, and the situation of not rotating in place or rotating over place may occur, the utility model provides an electric crank for a high-voltage switch cabinet, which can realize electric cranking and can accurately control the position change after the rotation of the trolley and the drawer.

[0006] The utility model adopts the following technical solutions to solve the above problems:

[0007] A motorized crank for a high-voltage switchgear cabinet, comprising a body. Inside the body is a motor. On one side of the motor is a motor rotor. The motor rotor is coaxially connected to a rotating rod. The other end of the rotating rod extends outside the body. Inside the body is also a counting sensor connected to the motor. The counting sensor is communicatively connected to a microprocessor.

[0008] Furthermore, on the surface of the body are a button and a display screen. Both the button and the display screen are communicatively connected to the microprocessor.

[0009] Furthermore, at the end of the body is a adapter mounting seat. The mounting seat is detachably connected to an adapter. The rotating rod is rotatably arranged inside the adapter mounting seat and the adapter.

[0010] Furthermore, at the rear end of the rotating rod is connected a rotor docking rod groove, which is detachably connected to the motor rotor.

[0011] Furthermore, between the rotating rod and the rotor docking rod groove is a rotating shaft rod, which is rotatably arranged inside the adapter.

[0012] Furthermore, inside the adapter is a rotating shaft sleeve. The inner wall of the rotating shaft sleeve is connected with a plurality of movable balls. At both the front and rear ends of the rotating shaft sleeve are limit rings.

[0013] Furthermore, on the inner wall of the limit ring are balls arranged at equal intervals. On the outer wall of the rotating shaft rod is a concave ball slide rail matching the balls.

[0014] Furthermore, on both sides of the body are symmetrically arranged grips. At the bottom of the grips are grooves for easy finger grasping.

[0015] Furthermore, a rectangular groove is opened below the tail of the body. The edge of the rectangular groove is hinged with a support seat.

[0016] Furthermore, the support seat is hinged with symmetric left and right supporting feet, and the supporting feet adopt a telescopic structure.

[0017] The beneficial effects of the present utility model are as follows:

[0018] 1. The present utility model provides a motorized crank for a high-voltage switchgear cabinet. The crank is rotated by a built-in motor. The motor rotor is docked with the crank holes of the handcart and the drawer to achieve electric rotation. In addition, a revolution sensor is provided to record the number of rotations of the motor rotor. The microprocessor collects and processes the revolution data. According to the models of different high-voltage switchgear handcarts and drawers, a reasonable number of rotations is set. When the motor rotates to the set number of rotations, at this time the handcart and the drawer reach the corresponding positions. At this time, the microprocessor can control the motor to lock, so as to accurately control the position change of the handcart and the drawer after rotation by the motorized crank.

[0019] 2. The utility model solves the problem that the current manual crank cannot accurately control the rotation adjustment position of the trolley and the drawer, and may not rotate in place or rotate too far;

[0020] 3. The rotating rod is detachably connected to the motor rotor through the docking groove and can be replaced according to the model of the high-voltage switch cabinet. It is easy to operate and has wide applicability.

[0021] 4. A detachable adapter and adapter mounting seat are provided outside the rotating rod and the docking groove to provide external protection and support. With the adapter as a supporting and protective structure, the rotating rod can remain stable during high-speed rotation to prevent uneven force caused by deflection. At the same time, the detachable structure of the adapter and adapter mounting seat also facilitates the replacement of rotating rods of different models.

[0022] 5. The inner wall of the shaft sleeve inside the adapter is evenly distributed with balls that can roll freely in the spherical groove, so that the outer wall of the shaft rod does not directly contact the inner wall of the shaft sleeve, which can reduce the friction force on the shaft rod when it rotates in the shaft sleeve;

[0023] 6. The handles are symmetrically arranged on both sides of the machine body. When operating, the handles are held by the operator to keep the machine body stable. This can prevent the turning rod of the electric crank from being deflected during operation, or even cause the turning rod to be separated from the crank hole;

[0024] 7. There are grooves at the bottom of the handle for easy finger gripping, which can make the grip more secure and further improve the stability of the machine;

[0025] 8. For the handle hole at a lower position, a support structure can be set on the machine body, which is conducive to the support structure directly supporting the machine body on the ground, so as to reduce the strength of holding the handle;

[0026] 9. Move the two supporting legs to the sides to separate them, so that a triangular structure is formed between the supporting legs and the ground to enhance the stability of the support base;

[0027] 10. The support legs adopt a retractable structure and are fixed by nail grooves and limit screws. They can be adjusted according to the actual height to increase the applicability of the support base. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 It is a schematic diagram of the internal components structure of the body of the utility model;

[0030] Figure 2 is the overall structural schematic diagram of the present utility model;

[0031] Figure 3 is the schematic diagram of the main body structure of the body of the present utility model;

[0032] Figure 4 is the schematic diagram of the adapter and the square rotating rod structure of the present utility model;

[0033] Figure 5 is the schematic diagram of the adapter and the hexagonal rotating rod structure of the present utility model;

[0034] Figure 6 is the schematic diagram of the square rotating rod, the rotating shaft rod and the rotor docking rod groove structure of the present utility model;

[0035] Figure 7 is the schematic diagram of the hexagonal rotating rod, the rotating shaft rod and the rotor docking rod groove structure of the present utility model;

[0036] Figure 8 is the schematic diagram of the internal structural relationship between the adapter and the rotating shaft rod of the present utility model;

[0037] Figure 9 is Figure 8 the enlarged schematic diagram of the structure at position A in

[0038] Figure 10 is the schematic diagram of the support base in a supporting state of the present utility model;

[0039] In the drawings, the structural names represented by each reference numeral are:

[0040] 1 - body, 101 - button, 102 - display screen, 2 - grip, 3 - support base, 301 - support leg, 4 - adapter mounting seat, 401 - mounting slot, 5 - adapter, 501 - mounting plug, 502 - ball, 503 - limit ring, 504 - rotating shaft sleeve, 6 - motor, 601 - motor rotor, 7 - microprocessor, 8 - revolution counting sensor, 9 - rotating rod, 10 - rotor docking rod groove, 11 - rotating shaft rod, 1101 - ball concave slide rail. Detailed implementation manners

[0041] In the description of the present utility model, unless otherwise specified, the orientation or state relationship indicated by terms such as "upper", "lower", "top", "bottom", "longitudinal", etc. is the orientation or state relationship based on the orientation or state relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the structure or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model.

[0042] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication or connection inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0043] Embodiment 1

[0044] As Figure 1 shown, the present utility model provides an electric crank for a high-voltage switch cabinet, which includes a body 1. A motor 6 is arranged inside the body 1, and a storage battery is also arranged inside the body 1 to provide power for the drive of the motor 6. A control switch is arranged on the surface of the body 1 to control the opening or locking of the motor 6. On one side of the motor 6, there is a motor rotor 601. The motor rotor 601 is coaxially connected to a rotating rod 9. The other end of the rotating rod 9 extends out of the outside of the body 1. The rotating rod 9 is used to be docked into the crank hole on the high-voltage switch cabinet. The motor 6 drives the rotating rod 9 to rotate, so as to perform electric cranking. The rotation of the rotor driven by the motor 6 replaces the manual crank, saving manpower and avoiding the possible phenomenon of the crank coming off during the manual cranking process. However, during the electric control rotation process, it is difficult to control the degree of rotation. Excessive cranking may cause excessive adjustment of the positions of the handcart and drawer of the high-voltage switch cabinet, while insufficient cranking may result in the positions of the handcart and drawer not being in place. Therefore, a counting sensor 8 connected to the motor 6 is also arranged inside the body 1. The counting sensor 8 is communicatively connected to a microprocessor 7 for collecting the information on the number of rotation turns of the motor 6. The collected number-of-turns information is fed into the microprocessor 7 and processed by the microprocessor 7.

[0045] As Figure 2 、 Figure 3As shown in the figure, the surface of the body 1 is provided with a button 101 and a display screen 102. Both the button 101 and the display screen 102 are communicatively connected to the microprocessor 7. The models of the high-voltage switchgear hand trucks and drawers with different model specifications are also different, and the number of turns required to rotate the crank by hand to move to the three position states of working, testing, and withdrawing is also different. Before operation, the rotation turn threshold can be set in advance through the button 101 according to the model of the high-voltage switchgear to be operated, and the set rotation turn threshold information can be saved in the memory unit in the microprocessor 7; then the rotating rod 9 is inserted into the crank hole, the motor 6 is started, and the rotating rod 9 is driven to rotate for cranking; at the same time, the turn counting sensor 8 collects the rotation turn information of the motor 6. After the microprocessor 7 receives the rotation turn information and processes it, the turn information data is displayed on the display screen 102; when the number of turns of the motor 6 reaches the set turn threshold, the microprocessor 7 will send a locking instruction to the control switch of the motor 6 to lock the motor and stop rotating; at this time, the positions of the hand truck and the drawer just stop at the required positions.

[0046] In this embodiment, the circuit connection structure among the motor 6, the storage battery, and the control switch belongs to the prior art, and the circuit connection structure and principle will not be elaborated here; the above-mentioned turn counting sensor 8 adopts a Hall sensor, the microprocessor 7 adopts an STM32 single-chip microcomputer, the motor 6 is a DC brushless motor, and the motor 6 can rotate forward and backward; the connections of the Hall sensor, the motor 6, the display screen 102, and the button 101 to the pins of the single-chip microcomputer belong to the prior art; in the case of determining the existing model of the single-chip microcomputer, those skilled in the art can connect the components according to the pin diagram of the single-chip microcomputer model.

[0047] Embodiment 2

[0048] As Figures 2 - 5 shown, a adapter mounting seat 4 is provided at the end of the body 1. The mounting seat 4 is detachably connected with an adapter 5, and the rotating rod 9 is rotatably arranged inside the adapter mounting seat 4 and the adapter 5; as Figures 6 - 8 shown, the rear end of the rotating rod 9 is connected with a rotor docking rod groove 10, and the rotor docking rod groove 10 is detachably connected with the motor rotor 601. A rotating shaft rod 11 is arranged between the rotating rod 9 and the rotor docking rod groove 10. The rotating shaft rod 11 is rotatably arranged in the adapter 5. A rotating shaft sleeve 504 is arranged in the adapter 5. A plurality of movable balls 502 are connected to the inner wall of the rotating shaft sleeve 504. Limiting rings 503 are arranged at both the front and rear ends of the rotating shaft sleeve 504. The balls 502 are arranged at equal intervals on the inner wall of the limiting ring 503. A ball concave slide rail 1101 matching the balls 502 is arranged on the outer wall of the rotating shaft rod 11. Other technical features are the same as those in Embodiment 1.

[0049] Based on Embodiment 1, in Embodiment 1, the rotating rod 9 used for docking into the crank handle holes on the handcart and the drawer is directly docked on the motor rotor 601, and the rotating rod 9 cannot be replaced. However, there are many manufacturers producing high-voltage switchgear, and the models of the high-voltage switchgear they produce also vary. Then, the models of the crank handle holes on the handcart and the drawer also have differences. In this way, during operation, multiple different models of crank handles need to be correspondingly equipped for different models of high-voltage switchgear. In this embodiment, the connection structure between the rotating rod 9 and the motor rotor is set as a detachable connection structure.

[0050] As Figure 6 , Figure 7 shown, a rotor docking rod slot 10 is provided at the rear end of the rotating rod 9. The rotor docking rod slot 10 is detachably inserted into the motor rotor to achieve the detachable connection between the rotating rod 9 and the motor rotor 601. However, in such a connection method, due to the certain lengths of both the rotating rod 9 and the rotor docking rod slot 10 and without any external protection and support auxiliary structure, when directly docked to the motor rotor, the motor rotor drives the rotating rod 9 and the rotor docking rod slot 10 to rotate, and it is very likely that during the high-speed rotation process, deviation may occur, resulting in a sudden increase in the force on one side of the rotating rod 9, causing the rotating rod 9 to bend or even break.

[0051] As Figure 3 shown, a swivel joint mounting seat 4 is provided at the head end of the body 1. Installation slots 401 are equidistantly arranged on the outer periphery of the swivel joint mounting seat 4. The installation slots 401 are set as cylindrical hole structures, and a swivel joint 5 is detachably connected to the swivel joint mounting seat 4; as Figure 4 , Figure 5 shown, installation rods 501 are provided on the swivel joint 5 corresponding to the installation slots 401. The installation rods 501 can just be inserted into the installation slots 401. By inserting the installation rods 501 into the installation slots 401, the swivel joint 5 can be detachably installed on the swivel joint mounting seat 4.

[0052] As Figures 4 - 8 shown, a rotating rod 9 is rotatably arranged inside the swivel joint 5. After the swivel joint 5 is installed on the swivel joint mounting seat 4, the rotating rod 9 can also be driven by the motor rotor. Thus, through the detachable installation of the swivel joint 5, the detachable installation of the rotating rod 9 is realized. Since the rotating rod 9 is detachable, the rotating rod 9 can be replaced, and different models of rotating rods 9 can be correspondingly replaced according to the structure of the crank handle holes on different models of switchgear. In this embodiment, two models of the rotating rod 9 are provided, namely a square rotating rod 9 and a hexagonal rotating rod 9.

[0053] The rotating rod 9 is rotatably arranged inside the adapter 5. With the adapter 5 as the supporting and protective structure, the rotating rod 9 can maintain stability during high-speed rotation, preventing uneven force caused by deflection. The adapter 5 is installed on the adapter mounting seat 4. The rotating rod 9 can also be driven by the motor 6. A rotating shaft rod 11 is arranged between the rotating rod 9 and the rotor docking rod groove 10. The rotating shaft rod 11 is rotatably arranged inside the adapter 5, and the rotor docking rod groove 10 at the rear end is exactly inserted on the motor rotor. The rotor docking rod groove 10 rotates driven by the motor rotor, thereby driving the rotating shaft rod 11 and the rotating rod 9 to rotate.

[0054] As Figure 8 shown, the middle part of the adapter 5 is set as a hollow channel. A rotating shaft sleeve 504 is arranged inside the hollow channel. A number of spherical grooves are evenly distributed on the inner wall of the rotating shaft sleeve 504. Movable balls 502 are arranged inside the spherical grooves. The balls 502 can freely roll inside the spherical grooves. The rotating shaft rod 11 passes through the inside of the rotating shaft sleeve 504, and the outer wall of the rotating shaft rod 11 contacts the balls 502. The arrangement of the balls 502 enables the outer wall of the rotating shaft rod 11 not to directly contact the inner wall of the rotating shaft sleeve 504, which can reduce the friction force when the rotating shaft rod 11 rotates inside the rotating shaft sleeve 504. The rotating shaft rod 11 is arranged inside the rotating shaft sleeve 504. Since there is no limiting connection structure with the balls 502 inside the rotating shaft sleeve 504, the rotating shaft rod 11 will shift back and forth. In order to avoid the shifting of the rotating shaft rod 11 and the rotating rod 9 during the rotation process.

[0055] As Figure 8 and Figure 9 shown, annular limiting rings 503 are arranged at the front and rear ends of the rotating shaft sleeve 504. The middle part of the limiting ring 503 is a hollow circular hollow structure. The square or hexagonal rotating rod 9 and the rotor docking rod groove 10 cannot pass through this circular hollow structure, while the middle cylindrical rotating shaft rod 11 can rotate inside this hollow structure. Therefore, the front and rear limiting rings 503 can play a role in limiting the front and rear shifting of the rotating rod 9 and the rotor docking rod groove 10. In order to avoid contact between the rotating shaft rod 11 and the inner wall of the limiting ring 503 and generate a large friction force when the rotating shaft rod 11 rotates inside the hollow structure of the limiting ring 503, as Figure 9As shown in the figure, spherical grooves are arranged at equal intervals on the inner wall of the limit ring 503. A ball 502 is movably arranged in the spherical groove, and the movable ball 502 can freely roll in the spherical groove. A ball concave slide rail 1101 is arranged on the outer wall of the rotating shaft rod 11 at the position corresponding to the moving track of the movable ball 502. The lower part of the ball 502 can just fit and contact with the inner wall of the ball concave slide rail 1101. Arranging the ball 502 on the inner wall of the limit ring 503 can prevent the outer wall of the rotating shaft rod 11 from directly contacting the inner wall of the limit ring 503, and reduce the friction between the rotating shaft rod 11 and the limit ring 503 during rotation. The design of the ball concave slide rail 1101 can provide a fixed sliding track for the ball 502. At the same time, the cooperation between the ball concave slide rail 1101 and the ball 502 can also play a role in limiting the rotating shaft rod 11 to a certain extent.

[0056] Embodiment 3

[0057] Grips 2 are symmetrically arranged on both sides of the body 1. A groove for facilitating finger grasping is provided at the bottom of the grip 2. Other technical features are the same as those in Embodiment 1 or 2.

[0058] Based on Embodiment 1 or 2, in order to facilitate the manual support of the electric crank during operation for the smoothness of the crank, as Figure 2 、 Figure 3 shown, in this embodiment, grips 2 are symmetrically arranged on both sides of the body 1. During operation, a person holds the grips 2 by hand to keep the body 1 stable, which can prevent the rotating rod 9 from tilting during the operation of the electric crank, and even cause the rotating rod 9 to disengage from the crank hole. A groove for facilitating finger grasping is provided at the bottom of the grip 2, which can make the grasping more firm, thereby further improving the stability of the body 1.

[0059] Embodiment 4

[0060] As Figure 2 、 Figure 3 、 Figure 10 shown, a rectangular groove is opened below the tail of the body 1. A support seat 3 is hinged on the edge of the rectangular groove. The support seat 3 is hinged with symmetric left and right support legs 301. The support legs 301 adopt a telescopic structure. Other technical features are the same as those in Embodiment 1 or 2.

[0061] Based on Embodiment 1 or 2 or 3, for the lower crank handle hole, a support structure can be provided on the body 1, which is conducive to directly supporting the body 1 on the ground by the support structure, so as to reduce the force on the hand-held grip 2; a rectangular vacancy groove is opened below the tail of the body 1, and a support seat 3 is hinged at the edge of the rectangular vacancy groove; when the support seat 3 is needed for support, only need to turn the support seat 3 by 90°, making it perpendicular to the ground, which is conducive to the support seat 3 to assist in supporting the body 1; in order to make the supporting effect of the support seat 3 more stable, a left-right symmetric foot 301 structure is provided below the support seat 3, and similarly the foot 301 is hinged below the support seat 3; the two foot 301 structures are pulled apart to the sides to separate them, so that a triangular structure is formed between the foot 301 and the ground, enhancing the stability of the support seat 3. The foot 301 adopts a telescopic structure and is fixed by a nail groove and a limit screw, and can be adjusted according to the actual height, improving the application range of the support seat 3.

[0062] The above has described the present utility model in detail through embodiments, but the content is only the preferred embodiment of the present utility model and cannot be considered as used to limit the scope of implementation of the present utility model. All equivalent changes and improvements made according to the scope of the application of the present utility model shall still fall within the scope covered by the patent of the present utility model.

Claims

1. A high-voltage switchgear electric crank, comprising a body (1), characterized in that: Inside the body (1), there is a motor (6). On one side of the motor (6), there is a motor rotor (601). The motor rotor (601) is coaxially connected to a rotating rod (9). The other end of the rotating rod (9) extends outside the body (1). Inside the body (1), there is also a counting sensor (8) connected to the motor (6). The counting sensor (8) is communicatively connected to a microprocessor (7).

2. The electric crank for high-voltage switchgear according to claim 1, characterized in that: On the surface of the body (1), there are a button (101) and a display screen (102). Both the button (101) and the display screen (102) are communicatively connected to the microprocessor (7).

3. A motorized crank for a high-voltage switchgear according to claim 1 or 2, characterized in that: At the end of the body (1), there is a adapter mounting seat (4). The mounting seat (4) is detachably connected to an adapter (5). The rotating rod (9) is rotatably arranged inside the adapter mounting seat (4) and the adapter (5).

4. The electric turning handle of a high-voltage switch cabinet according to claim 3, characterized in that: At the rear end of the rotating rod (9), there is a rotor docking rod groove (10). The rotor docking rod groove (10) is detachably connected to the motor rotor (601).

5. The electric turning handle of a high-voltage switch cabinet according to claim 4, characterized in that: Between the rotating rod (9) and the rotor docking rod groove (10), there is a rotating shaft rod (11). The rotating shaft rod (11) is rotatably arranged inside the adapter (5).

6. The electric crank for high-voltage switchgear according to claim 5, characterized in that: Inside the adapter (5), there is a rotating shaft sleeve (504). The inner wall of the rotating shaft sleeve (504) is connected with a plurality of movable balls (502). At both the front and rear ends of the rotating shaft sleeve (504), there are limit rings (503).

7. A motorized crank for a high-voltage switchgear according to claim 6, characterized in that: On the inner wall of the limit ring (503), the balls (502) are arranged at equal intervals. On the outer wall of the rotating shaft rod (11), there is a ball concave slide rail (1101) matching the balls (502).

8. A motorized crank for a high-voltage switchgear according to claim 1 or 2, characterized in that: On both sides of the body (1), there are symmetrically arranged grips (2). At the bottom of the grips (2), there are grooves facilitating finger grasping.

9. A motorized crank for a high-voltage switchgear according to claim 1 or 2, characterized in that: Below the tail of the body (1), a rectangular groove is opened. Along the edge of the rectangular groove, there is a support seat (3) hinged.

10. The electric turning handle of a high-voltage switch cabinet according to claim 9, characterized in that: The support seat (3) is hinged with symmetric left and right supporting feet (301). The supporting feet (301) adopt a telescopic structure.

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