Electric operating mechanism

Abstract

The utility model discloses an electric operating mechanism, which comprises a shell, a transmission square shaft, a tripping linkage shaft, and a motor, a worm, a worm gear, a turntable, a tripping slide block and a spring which are respectively arranged in the shell, one end of the transmission square shaft can drive the circuit breaker to be switched on, and the other end of the transmission square shaft is rotationally mounted in the shell; one end of the tripping linkage shaft can drive the circuit breaker to trip and open, and the other end of the tripping linkage shaft extends into the shell; the worm is mounted on a driving shaft of the motor; the worm gear movably sleeves the transmission square shaft and is meshed with the worm; the turntable is stacked on the front side of the worm gear, assembled outside the transmission square shaft and linked with the worm gear; the tripping sliding block is slidably mounted on the shell on the rear side of the worm gear and corresponds to the worm gear in position, and the tripping sliding block is linked with the worm gear; and the spring is arranged between the shell and the tripping slide block. According to the utility model, automatic on-off of the circuit breaker can be remotely controlled without arriving at the position of a 5G cabinet, so that the manual maintenance cost is reduced, and the market demand of the electric operating mechanism specially used for the 5G circuit breaker in the industry is effectively met.

Description

Technical Field

[0001] The utility model belongs to the technical field of low-voltage electrical equipment, and particularly relates to an electric operating mechanism. Background Technique

[0002] At present, in the 5G communication industry, plug-in thermal-magnetic miniature circuit breakers are applied in 5G cabinets, but they are all installed outdoors. If the circuit breaker trips accidentally due to lightning strikes, the manual maintenance cost is high. At present, there is no dedicated electric operating mechanism for 5G circuit breakers in the industry. Therefore, there is an urgent need for an electric operating mechanism that can remotely control the automatic on-off of the circuit breaker to meet the market demand for the electric operating mechanism dedicated to 5G circuit breakers in the industry. Content of the Utility Model

[0003] In order to solve the above problems, the purpose of the utility model is to provide an electric operating mechanism, which can remotely control the automatic on-off of the circuit breaker, reduce the manual maintenance cost, and meet the market demand for the electric operating mechanism dedicated to 5G circuit breakers in the industry.

[0004] The purpose of the utility model is realized by the following technical solutions:

[0005] An electric operating mechanism is used to drive an externally preset circuit breaker to trip or close. It includes a housing, a transmission square shaft, a tripping linkage shaft, and a motor, a worm, a worm gear, a turntable, a tripping slider and a spring respectively installed in the housing; one end of the transmission square shaft can drive the circuit breaker to close, and the other end is rotatably installed in the housing; one end of the tripping linkage shaft can drive the circuit breaker to trip and open, and the other end extends into the housing from an arc-shaped through hole preset on the housing and can slide along the arc-shaped through hole. The arc-shaped through hole is located on the right side of the transmission square shaft; the worm is installed on the drive shaft of the motor; the worm gear is movably sleeved outside the transmission square shaft and meshes with the worm; the turntable is stacked on the front side of the worm gear and is assembled outside the transmission square shaft through a square hole preset in the middle. The turntable is linked with the worm gear and can drive the transmission square shaft to rotate under the drive of the worm gear, so that the circuit breaker closes and is connected; the tripping slider is slidably installed on the housing behind the worm gear and corresponds to the position of the worm gear. The tripping slider is linked with the worm gear and can push the tripping linkage shaft to move under the drive of the worm gear, so that the circuit breaker trips and opens; the spring is installed between the housing and the tripping slider for resetting the tripping slider.

[0006] Further, the circuit breaker is a 2P circuit breaker or a 3P circuit breaker or a 4P circuit breaker, and even more circuit breakers.

[0007] Further, the outer diameter of the worm gear is larger than the outer diameter of the turntable. On the surface of the worm gear facing the turntable, there is a first convex rib, and the first convex rib is located outside the turntable; on the outer peripheral wall of the turntable, there is a flange corresponding to the first convex rib; after the first convex rib rotates a certain angle with the worm gear, it can collide with the flange and push the flange and the turntable to rotate, so that the circuit breaker closes and is connected.

[0008] Further, to achieve stable and reliable opening and closing of the circuit breaker, the number of the first ribs is two and they are symmetrically arranged on the surface of the worm wheel facing the turntable; correspondingly, the number of the flanges is also two and they are symmetrically arranged on the outer peripheral wall of the turntable.

[0009] Further, the tripping slider is arranged on the lower side of the arc-shaped through hole. The upper end of the tripping slider extends between the tripping linkage shaft and the transmission square shaft and contacts the tripping linkage shaft, and the lower end of the tripping slider is slidably mounted on the housing.

[0010] Further, a strip-shaped groove penetrating the upper and lower surfaces of the tripping slider is provided at the lower end of the tripping slider. The strip-shaped groove is arranged along the sliding direction of the tripping slider. Correspondingly, a convex strip extending into the strip-shaped groove and capable of sliding along the strip-shaped groove is fixed in the housing; the spring is arranged in the strip-shaped groove and on the right side of the convex strip.

[0011] Further, a second rib is provided on the surface of the worm wheel facing away from the turntable; after the second rib rotates with the worm wheel by a certain angle, it can collide with the tripping slider and push the tripping slider and the tripping linkage shaft to move away from the transmission square shaft, so that the circuit breaker trips and disconnects.

[0012] Further, to achieve remote automatic control of the opening and closing of the circuit breaker, the electric operating mechanism further includes a control panel installed in the housing; a forward and reverse control circuit for controlling the forward and reverse rotation of the motor and a micro switch for detecting the on-off position signal and located on the left side of the transmission square shaft are provided on the control panel; the micro switch includes a first micro switch, a second micro switch and a third micro switch respectively electrically connected to the control panel; wherein the first micro switch is located on the lower side and is used for detecting whether the circuit breaker reaches the tripping and disconnecting position; the second micro switch is located in the middle and is used for detecting whether the circuit breaker reaches the closing and connecting position; the third micro switch is located on the upper side and is used for detecting whether the worm wheel reaches the free position; both the first micro switch and the second micro switch are located outside the worm wheel, and the third micro switch extends below the edge of the worm wheel.

[0013] Further, a third rib is provided on the surface of the worm wheel facing away from the turntable; the third rib is located outside the second rib, the distance from the third rib to the center of the worm wheel is greater than the distance from the second rib to the center of the worm wheel, the third rib can toggle the third micro switch as the worm wheel rotates, and the second rib cannot toggle the third micro switch; a lever is fixed on the outer peripheral wall of the turntable; the lever extends outside the worm wheel and can alternately toggle the first micro switch and the second micro switch as the turntable rotates.

[0014] Further, to specifically define the positions of the second rib and the third rib, when the circuit breaker reaches the tripping and disconnecting position and the worm wheel is in the free position, the third rib just completes the toggling of the third micro switch, and at the same time the lever just toggles the first micro switch, the first rib is disengaged from the flange, and the second rib is located between the left first rib and the lower flange.

[0015] The structure of the utility model is reasonable and the action is reliable. Without reaching the position of the 5G cabinet, the circuit breaker can be remotely controlled to automatically turn on and off, reducing the manual maintenance cost and effectively meeting the market demand for the electric operating mechanism dedicated to the 5G circuit breaker in the industry. Brief Description of the Drawings

[0016] The structure of the utility model will be further described in detail below with reference to the drawings.

[0017] Figure 1 It is an installation schematic diagram of the electric operating mechanism described in the utility model.

[0018] Figure 2 It is an internal structure diagram of the electric operating mechanism described in the utility model.

[0019] Figure 3 It is a schematic structural diagram of the worm gear facing the turntable side described in the utility model.

[0020] Figure 4 It is a schematic structural diagram of the worm gear facing away from the turntable side described in the utility model.

[0021] Figure 5 It is a schematic structural diagram of the turntable described in the utility model.

[0022] As shown in the figure: 1 - circuit breaker, 2 - electric operating mechanism, 21 - worm, 22 - motor, 23 - housing, 231 - arc-shaped through hole, 24 - control panel, 25 - tripping slider, 26 - spring, 27 - worm gear, 271 - rib one, 272 - rib two, 273 - rib three, 28 - turntable, 281 - flange, 282 - lever, 283 - square hole, 29 - microswitch one, 30 - microswitch two, 31 - microswitch three. Specific Embodiments

[0023] The embodiments of the present utility model will be described below by specific specific examples. Those familiar with this technology can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] It should be noted that the structures, ratios, sizes, etc. depicted in the attached drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of this utility model. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that this utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in this utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are also only for the convenience of clear narration and are not used to limit the scope for the implementation of this utility model. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope within which this utility model can be implemented.

[0025] In the description of this utility model, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" 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. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances. It should be noted that the terms "including", "comprising", or any other variant are intended to cover non-exclusive inclusion, so that a process, method, article, or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such a process, method, article, or device. Embodiment

[0026] As Figure 1 shown, this embodiment provides an electric operating mechanism, which is installed on a preset circuit breaker 1 outside it through multiple fixing screws 3 and is used to drive the preset circuit breaker 1 outside it to trip or close. The circuit breaker 1 is a 4P circuit breaker.

[0027] As Figure 1 And 2 shown, the electric operating mechanism mainly includes a housing 23, a transmission square shaft 5, a tripping linkage shaft 4, and a motor 22, a worm 21, a worm gear 27, a turntable 28, a tripping slider 25, a spring 26, and a control panel 24 respectively installed inside the housing 23.

[0028] The housing 23 is in the shape of a flat cuboid with a hollow interior. As an installation carrier, the housing 23 is fixed on the circuit breaker 1 outside it through multiple fixing screws 3.

[0029] One end of the transmission square shaft 5 is installed inside the circuit breaker 1 and is linked with the closing component inside the circuit breaker 1 and can drive the circuit breaker 1 to close. The other end of the transmission square shaft 5 is rotatably installed inside the housing 23.

[0030] One end of the trip linkage shaft 4 is installed inside the circuit breaker 1 and is linked with the trip and opening components inside the circuit breaker 1 and can drive the circuit breaker 1 to trip and open. The other end of the trip linkage shaft 4 extends into the housing 23 through an arc-shaped through hole 231 preset on the housing 23 and can slide along the arc-shaped through hole 231. The arc-shaped through hole is located on the right side of the transmission square shaft 5.

[0031] The motor 22 is installed inside the housing 23 and is located above and to the right of the transmission square shaft 5. The drive shaft of the motor 22 is parallel to the long side surface of the housing 23 and points to the left.

[0032] The worm 21 is installed on the drive shaft of the motor 22 and is coaxially connected to the drive shaft of the motor 22.

[0033] The worm gear 27 is movably sleeved outside the transmission square shaft 5 through a circular hole preset in the middle thereof and corresponds to the position of the worm 21. The outer side of the worm gear 27 meshes with the worm 21. The worm gear 27 can rotate around the transmission square shaft 5. The outer diameter of the worm gear 27 is larger than the outer diameter of the turntable 28.

[0034] The turntable 28 is stacked on the front side of the worm gear 27. The turntable 28 is assembled outside the transmission square shaft 5 through a square hole 283 preset in the middle thereof. The turntable 28 is linked with the worm gear 27 and can drive the transmission square shaft 5 to rotate under the drive of the worm gear 27, so that the circuit breaker 1 is closed and connected.

[0035] The trip slider 25 is slidably installed on the housing 23 at the rear side of the worm gear 27 and corresponds to the position of the worm gear 27. The trip slider 25 is linked with the worm gear 27 and can push the trip linkage shaft 4 to move under the drive of the worm gear 27, so that the circuit breaker 1 trips and breaks. The trip slider 25 is arranged at the lower side of the arc-shaped through hole 231. The upper end of the trip slider 25 extends between the trip linkage shaft 4 and the transmission square shaft 5 and contacts the trip linkage shaft 4. The lower end of the trip slider 25 is slidably installed on the housing 23. A strip-shaped groove penetrating the upper and lower surfaces of the trip slider 25 is provided at the lower end of the trip slider 25. The strip-shaped groove is arranged along the sliding direction of the trip slider 25. Correspondingly, a convex strip extending into the strip-shaped groove and capable of sliding along the strip-shaped groove is fixed inside the housing 23.

[0036] The spring 26 is installed between the housing 1 and the trip slider 25. Specifically, the spring 26 is arranged in the strip-shaped groove and is located on the right side of the convex strip for resetting the trip slider 25.

[0037] The control panel 24 is installed inside the housing 23 to achieve remote automatic control of the on / off of the circuit breaker 1; on the control panel 24, there is a forward and reverse control circuit for controlling the forward and reverse rotation of the motor 22 and a microswitch for detecting the on / off position signal of the circuit breaker and located on the left side of the transmission square shaft 5. The forward and reverse control circuit adopts a conventional control circuit. In addition, the control panel 24 is connected to a remote control device (such as a computer or a remote control) in a wireless or wired manner, and the forward and reverse control circuit on the control panel 24 is controlled by the remote control device to achieve remote automatic control of the motor 22. The microswitch includes a first microswitch 29, a second microswitch 30, and a third microswitch 31 that are respectively electrically connected to the control panel 24; among them, the first microswitch 29 is located at the lower side inside the housing 23 and is used to detect whether the circuit breaker 1 reaches the off position; the second microswitch 30 is located in the middle inside the housing 23 and is used to detect whether the circuit breaker 1 reaches the on position; the third microswitch 31 is located at the upper side inside the housing 23 and is used to detect whether the worm gear 27 reaches the free position; both the first microswitch 29 and the second microswitch 30 are located below (outside) the left side of the worm gear 27, and the third microswitch 31 extends below the edge of the worm gear 27.

[0038] As Figure 3 shown, on the surface of the worm gear 27 facing the turntable 28, there is a first rib 271. The first rib 271 is located outside the turntable 28, and the number of the first ribs 271 is two and they are symmetrically arranged on the surface of the worm gear 27 facing the turntable 28. As Figure 5 shown, on the outer peripheral wall of the turntable 28, there is a flange 281 corresponding to the first rib 271; after the first rib 271 rotates with the worm gear 27 by a certain angle, it can collide with the flange 281 and push the flange 281 and the turntable 28 to rotate, so that the circuit breaker 1 is closed and connected. The number of the flanges 281 is also two and they are symmetrically arranged on the outer peripheral wall of the turntable 28 to achieve stable and reliable on / off of the circuit breaker 1.

[0039] As Figure 4 shown, on the surface of the worm gear 27 facing away from the turntable 28, there is also a second rib 272; after the second rib 272 rotates with the worm gear 27 by a certain angle, it can collide with the lower end of the trip slider 25 and push the trip slider 25 and the trip linkage shaft 4 (along the arc-shaped through hole 231) to move in a direction away from the transmission square shaft 5, so that the circuit breaker 1 trips and disconnects.

[0040] As Figure 4 shown, on the surface of the worm gear 27 facing away from the turntable 28, there is also a third rib 273; the third rib 273 is located outside the second rib 272, and the distance from the third rib 273 to the center of the worm gear 27 is greater than the distance from the second rib 272 to the center of the worm gear 27. The third rib 273 can toggle the third microswitch 31 as the worm gear 27 rotates. During the rotation process, the second rib 272 will not toggle the third microswitch 31.

[0041] As shown Figure 5 in the figure, a shift lever 282 is fixed on the outer peripheral wall of the turntable 28; the shift lever 282 extends to the outside of the worm gear 27 and can alternately toggle the microswitch one 29 and the microswitch two 30 as the turntable 28 rotates.

[0042] To specifically define the positions of the second rib 272 and the third rib 273, as Figure 2 shown in the figure, when the circuit breaker 1 reaches the tripping and breaking position and the worm gear 27 is in the free position, the third rib 273 just completes the toggling of the microswitch three 31, and at the same time, the shift lever 282 just toggles the microswitch one 29, and the first rib 271 is disengaged from the flange 281, and the second rib 272 is located between the left first rib 271 and the lower flange 281.

[0043] Working principle:

[0044] As Figure 2 shown in the figure, it is a schematic diagram when the circuit breaker 1 reaches the tripping and breaking position and the worm gear 27 is in the free position, regarded as the initial state.

[0045] Starting from the initial state as Figure 2 shown in the figure, the control panel controls the motor 22 to rotate forward. The motor 22 drives the worm gear 27 to rotate clockwise through the worm 21. After the worm gear 27 rotates clockwise by a certain angle, the first rib 271 on the left side of the worm gear 27 contacts the upper flange 281 of the turntable 28, and at the same time, the first rib 271 on the right side of the worm gear 27 contacts the lower flange 281 of the turntable 28. The worm gear 27 continues to rotate, pushing the turntable 28 to rotate clockwise synchronously. While the turntable 28 rotates, it drives the transmission square shaft 5 to rotate through the square hole 283 in its center. The rotation of the transmission square shaft 5 drives the closing and connecting components in the circuit breaker 1 to act, making the circuit breaker 1 connected. While the turntable 28 rotates, the shift lever 282 on it also rotates synchronously. After the shift lever 282 rotates from the microswitch one 29 to the microswitch two 30 and toggles the microswitch two 30, the microswitch two 30 detects the on-off signal and sends this signal to the control panel 24, and the connection is completed. During this process, the third rib 273 rotates clockwise with the worm gear 27 and moves away from the microswitch three 31. After the circuit breaker is connected, the motor 22 rotates in the reverse direction, drives the worm gear 27 to rotate counterclockwise through the worm 21, and the third rib 273 also rotates counterclockwise synchronously until the third rib 273 contacts and toggles the microswitch three 31. The microswitch three 31 detects the on-off signal and sends it to the control panel 24. The control panel 24 controls the motor 22 to stop, and the worm gear 27 returns to the free position, and the first rib 271 of the worm gear 27 is disengaged from the flange 281 of the turntable 28. At this time, the circuit breaker 1 can be manually turned on and off.

[0046] When automatic tripping and breaking are to be carried out later, the control panel 24 controls the motor 22 to rotate in the reverse direction. The motor 22 drives the worm 21 and the worm gear 27 to rotate counterclockwise. As the worm gear 27 rotates counterclockwise, the rib one 271 and the rib two 272 on it also rotate synchronously. The rib one 271 first contacts the flange 281 of the turntable 28 (the rib one 271 on the left side of the worm gear 27 contacts the flange 281 on the lower side of the turntable 28, and at the same time, the rib one 271 on the right side of the worm gear 27 contacts the flange 281 on the upper side of the turntable 28). After that, the worm gear 27 continues to rotate counterclockwise, driving the turntable 28 and the shift lever 282 on it to rotate counterclockwise synchronously. At the same time, during the rotation of the turntable 28, the rib two 272 of the worm gear 27 first contacts the tripping slider 25 and drives the tripping slider 25 to move to the right. The tripping slider 25 moving to the right collides with and pushes the tripping linkage shaft 4 to move to the right, causing the circuit breaker to trip and break. At this time, when the shift lever 282 rotates from the microswitch two 30 to the microswitch two 29 and toggles the microswitch two 29, the microswitch two 29 detects the on-off signal and sends the signal to the control panel 24, completing the tripping and breaking of the circuit breaker. After the control panel 24 receives the signal indicating the completion of tripping and breaking, the control panel 24 controls the motor 22 to rotate forward and drives the worm gear 27 to rotate clockwise through the worm 21. The rib three 273 also rotates clockwise synchronously until the rib three 273 contacts and toggles the microswitch three 31. The microswitch three 31 detects the on-off signal and sends it to the control panel 24, and the control panel 24 controls the motor 22 to stop, and the worm gear 27 returns to the free position.

[0047] Other details not elaborated in this utility model are all well-known conventional technologies in the art.

[0048] It should be noted that the term "including", "comprising" or any other variant is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device.

[0049] The protection scope of this utility model is not limited to the technical solutions disclosed in the specific embodiments. Any modification, equivalent replacement, improvement, etc. made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

Claims

1. An electric operating mechanism, characterized in that: It includes a housing, a transmission square shaft, a tripping linkage shaft, and a motor, a worm, a worm gear, a turntable, a tripping slider, and a spring respectively installed in the housing; One end of the transmission square shaft can drive the circuit breaker to close, and the other end is rotatably installed in the housing; One end of the tripping linkage shaft can drive the tripping and opening components of the circuit breaker, and the other end extends into the housing through an arc-shaped through hole preset on the housing and can slide along the arc-shaped through hole. The arc-shaped through hole is located on the right side of the transmission square shaft; The worm is installed on the drive shaft of the motor; The worm gear is movably sleeved outside the transmission square shaft and meshes with the worm; The turntable is stacked on the front side of the worm gear and is assembled outside the transmission square shaft through its middle. The turntable is linked with the worm gear and can drive the transmission square shaft to rotate under the drive of the worm gear; The tripping slider is slidably installed on the housing at the rear side of the worm gear and corresponds to the position of the worm gear. The tripping slider is linked with the worm gear and can push the tripping linkage shaft to move under the drive of the worm gear; The spring is installed between the housing and the tripping slider.

2. The electric operating mechanism according to claim 1, characterized in that: The circuit breaker is a 2P circuit breaker or a 3P circuit breaker or a 4P circuit breaker.

3. The electric operating mechanism according to claim 1, characterized in that: On the surface of the worm gear facing the turntable, there is a first rib, and the first rib is located outside the turntable; on the outer peripheral wall of the turntable, there is a flange corresponding to the first rib; after the first rib rotates a certain angle with the worm gear, it can collide with the flange and push the flange and the turntable to rotate, so that the circuit breaker closes and is connected.

4. The electric operating mechanism according to claim 3, wherein: The number of the first ribs is two and they are symmetrically arranged on the surface of the worm gear facing the turntable; correspondingly, the number of the flanges is also two and they are symmetrically arranged on the outer peripheral wall of the turntable.

5. The electric operating mechanism according to claim 4, wherein: The tripping slider is arranged on the lower side of the arc-shaped through hole. The upper end of the tripping slider extends between the tripping linkage shaft and the transmission square shaft and contacts the tripping linkage shaft, and the lower end of the tripping slider is slidably installed on the housing.

6. The electric operating mechanism according to claim 5, characterized in that: The lower end of the tripping slider is provided with a strip-shaped groove penetrating the upper and lower surfaces of the tripping slider. The strip-shaped groove is arranged along the sliding direction of the tripping slider. Correspondingly, a convex strip that extends into the strip-shaped groove and can slide along the strip-shaped groove is fixed in the housing; the spring is arranged in the strip-shaped groove and is located on the right side of the convex strip.

7. The electric operating mechanism according to claim 5, characterized in that: On the surface of the worm gear facing away from the turntable, there is a second rib; after the second rib rotates a certain angle with the worm gear, it can collide with the tripping slider and push the tripping slider and the tripping linkage shaft to move away from the transmission square shaft, so that the circuit breaker trips and disconnects.

8. The electric operating mechanism according to claim 7, characterized in that: It also includes a control panel installed in the housing; on the control panel, there is a forward and reverse control circuit for controlling the forward and reverse rotation of the motor and a micro switch for detecting the on-off position signal and located on the left side of the transmission square shaft; the micro switch includes a first micro switch, a second micro switch, and a third micro switch respectively electrically connected to the control panel; among them, the first micro switch is located on the lower side and is used to detect whether the circuit breaker reaches the tripping and disconnecting position; the second micro switch is located in the middle and is used to detect whether the circuit breaker reaches the closing and connecting position; the third micro switch is located on the upper side and is used to detect whether the worm gear reaches the free position; both the first micro switch and the second micro switch are located outside the worm gear, and the third micro switch extends below the edge of the worm gear.

9. The electric operating mechanism according to claim 8, characterized in that: There is a third rib on the surface of the worm gear facing away from the turntable; the third rib can toggle the third microswitch as the worm gear rotates, and the second rib will not toggle the third microswitch; a lever is fixed on the outer peripheral wall of the turntable; the lever extends to the outside of the worm gear and can alternately toggle the first microswitch and the second microswitch as the turntable rotates.

10. The electric operating mechanism according to claim 9, characterized in that: When the circuit breaker reaches the tripping and breaking position and the worm gear is in the free position, the third rib just completes the toggling of the third microswitch, and at the same time the lever just toggles the first microswitch, the first rib is disengaged from the flange, and the second rib is located between the left first rib and the lower flange.

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