Electric operating mechanism

Abstract

The utility model relates to an electric operating mechanism which comprises a mechanism frame, a shell, an intelligent control circuit board assembly, an electric operating assembly and a sliding block, the electric operating assembly comprises a motor, a motor gear, a manual operating shaft, a cam, a driving gear and a transmission gear set, and a cover plate covering the motor gear, the transmission gear set and the driving gear is arranged on the mechanism frame. The intelligent control circuit board assembly comprises an isolation plate, a communication circuit board, a microswitch, a box body and a power supply circuit board, the isolation plate is provided with a clamping hook matched with the cover plate, the cover plate is provided with a clamping groove matched with the clamping hook, the clamping hook is clamped in the clamping groove, and clamping matching of the isolation plate and the cover plate is formed. The utility model has the advantages of simple structure, stable and reliable performance, small volume and convenient assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to an electric operating mechanism used on a molded case circuit breaker. Background Art

[0002] A circuit breaker is a distribution device used in a power grid. It can connect, carry and disconnect current under normal circuit conditions, and can also connect, carry and disconnect current for a certain period of time under specified abnormal conditions (such as overload, short circuit, undervoltage and single-phase grounding fault). The electric operating mechanism is a special accessory for molded case circuit breakers. After cooperating with the circuit breaker, it can remotely close, disconnect and re-lock the circuit breaker to achieve centralized and automatic control of the transmission and distribution network. With the development of the power industry, the operating mechanism of the molded case circuit breaker has gradually become the mainstream of current development, and the design is developing in the direction of miniaturization and intelligence. The electric operating mechanism includes a mechanism frame, a shell arranged on the mechanism frame, an electric operating component arranged on the mechanism frame, an intelligent control circuit board component, and a slider that is slidably arranged on the mechanism frame and drives the handle of the molded case circuit breaker to perform opening and closing. The structure of the electric operating component of the existing electric operating mechanism is complex and occupies a large space. In addition, the intelligent control circuit board component cannot be integrated and modularized, and modular assembly cannot be achieved. In addition, the electric operating mechanism has the defects of unreliable performance, inconvenient assembly and large size. Summary of the invention

[0003] The purpose of the utility model is to overcome the defects of the prior art and provide an electric operating mechanism with simple structure, stable and reliable performance, small size and convenient assembly.

[0004] To achieve the above-mentioned purpose, the utility model adopts an electric operating mechanism, including a mechanism frame, a shell arranged on the mechanism frame, an intelligent control circuit board assembly arranged on the mechanism frame, an electric operating assembly arranged on the mechanism frame, a slider slidably arranged on the mechanism frame and driving the handle of the molded case circuit breaker to perform opening and closing, and the electric operating assembly includes a motor arranged on the mechanism frame, a motor gear arranged on the rotating shaft of the motor, a cam rotatingly arranged on the mechanism frame to move the operating shaft, a cam that cooperates with the manual operating shaft and is used to drive the slider to move, a driving gear arranged on the manual operating shaft, and a cam arranged on the motor gear. A transmission gear group between the motor gear, the transmission gear group and the driving gear is arranged on the mechanism frame, and a cover plate is arranged on the mechanism frame to cover the motor gear, the transmission gear group and the driving gear. The intelligent control circuit board assembly includes an isolation plate arranged on the cover plate, a communication circuit board arranged on the isolation plate, a micro switch arranged on the isolation plate and matched with the manual operation shaft, a box body arranged on the mechanism frame, and a power supply circuit board arranged in the box body. The isolation plate is provided with a hook matched with the cover plate, and the cover plate is provided with a slot matched with the hook. The hook is engaged in the slot and constitutes a snap-fit ​​match between the isolation plate and the cover plate.

[0005] The beneficial effects of the above structure are: the electric operation component adopts a modular structure design, which can realize the modular assembly of the electric operation component and the mechanism frame, and the assembly efficiency is higher. The cover plate protects the drive gear, the transmission gear set, and the motor gear, which can ensure the working reliability of the electric operation component. The intelligent control circuit board component adopts a modular structure design, which is convenient for the modular assembly of the intelligent control circuit board component and the mechanism frame, and the isolation plate can separate the communication circuit board from the electric operation component, which can ensure that the electric operation component and the intelligent control circuit board do not interfere with each other. The isolation plate and the cover plate are assembled in a snap-fit ​​manner, which is conducive to the modular assembly of the communication circuit board and the cover plate. Therefore, the electric operating mechanism has the advantages of simple structure, stable and reliable performance, small size, and convenient assembly.

[0006] In particular, the transmission gear set includes a first transmission gear meshed with the motor gear, a second transmission gear meshed with the first transmission gear, and a third transmission gear meshed with the second transmission gear, and the third transmission gear meshes with the driving gear. The motor gear drives the driving gear to move through the first transmission gear, the second transmission gear, and the third transmission gear, so that the transmission is more stable and reliable.

[0007] In particular, the communication circuit board is provided with an indicator light, the communication circuit board is provided with a light guide column covering the indicator light, the housing is provided with an indication hole corresponding to the light guide column, and one end of the light guide column is inserted into the indication hole. The light guide column can guide the light of the indicator light out of the housing, thereby facilitating the indication effect of the electric operating mechanism.

[0008] In particular, the manual operating shaft is provided with a convex strip that matches the micro switch, and the convex strip moves with the manual operating shaft and triggers the micro switch, and realizes the connection or disconnection of the micro switch. The manual operating shaft triggers the micro switch through the convex strip, and the micro switch can monitor the position of the manual operating shaft, which is conducive to improving the working reliability of the electric operating mechanism.

[0009] In particular, the manual operating shaft is provided with an opening and closing indicator disk, the housing is provided with an opening and closing indicator hole at a position corresponding to the opening and closing indicator disk, and a window transparent plug is provided in the opening and closing indicator hole. The window transparent plug is provided in the opening and closing indicator hole, and the window transparent plug can prevent dust from entering the electric operating mechanism from the opening and closing indicator hole, thereby facilitating the improvement of the protection performance of the electric operating mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a stereogram of an embodiment of the utility model.

[0011] Figure 2This is an exploded view of an embodiment of the utility model.

[0012] Figure 3 This is an internal structure diagram of an embodiment of the utility model.

[0013] Figure 4 It is the front view of the internal structure of the embodiment of the utility model. DETAILED DESCRIPTION

[0014] like Figures 1 to 4 As shown, the embodiment of the utility model is an electric operating mechanism, including a mechanism frame 10, a shell 11 arranged on the mechanism frame 10, an intelligent control circuit board assembly 20 arranged on the mechanism frame 10, an electric operating assembly 30 arranged on the mechanism frame 10, and a slider 12 slidably arranged on the mechanism frame 10 and driving the handle of the molded case circuit breaker to perform opening and closing. The electric operating assembly 30 includes a motor 31 arranged on the mechanism frame 10, a motor gear 32 arranged on the rotating shaft of the motor 31, a manual operating shaft 33 rotatably arranged on the mechanism frame 10, a cam 34 that cooperates with the manual operating shaft 33 and is used to drive the slider 12 to move, a driving gear 35 arranged on the manual operating shaft 33, and a cam 34 arranged between the motor gear 32 and the driving gear 35. The transmission gear set 36, the mechanism frame 10 is provided with a cover plate 13 covering the motor gear 32, the transmission gear set 36, and the driving gear 35, the intelligent control circuit board assembly 20 includes an isolation plate 21 arranged on the cover plate 13, a communication circuit board 22 arranged on the isolation plate 21, a micro switch 23 arranged on the isolation plate 21 and matched with the manual operation shaft 33, a box body 24 arranged on the mechanism frame 10, and a power supply circuit board 25 arranged in the box body 24, the isolation plate 21 is provided with a hook 211 matched with the cover plate 13, the cover plate 13 is provided with a slot 131 matched with the hook 211, the hook 211 is engaged in the slot 131, and constitutes a snap-fit ​​match between the isolation plate 21 and the cover plate 13. The transmission gear set 36 includes a first transmission gear 361 meshed with the motor gear 32, a second transmission gear 362 meshed with the first transmission gear 361, and a third transmission gear 363 meshed with the second transmission gear 362. The third transmission gear 363 meshes with the driving gear 35. The motor gear drives the driving gear to move through the first transmission gear, the second transmission gear, and the third transmission gear, so that the transmission is more stable and reliable.

[0015] like Figure 2 , 3As shown, the communication circuit board 22 is provided with an indicator light 221, and the communication circuit board 22 is provided with a light guide column 222 covering the indicator light 221. The housing 11 is provided with an indication hole 111 corresponding to the light guide column 222, and one end of the light guide column 222 is inserted into the indication hole 111. The light guide column can guide the light of the indicator light out of the housing, which is beneficial to improve the indication effect of the electric operating mechanism. The manual operating shaft 33 is provided with a convex strip 331 that matches the micro switch 23. The convex strip 331 moves with the manual operating shaft 33 and triggers the micro switch 23, and realizes the connection or disconnection of the micro switch 23. The manual operating shaft triggers the micro switch through the convex strip, and the micro switch can monitor the position of the manual operating shaft, which is beneficial to improve the working reliability of the electric operating mechanism. The manual operation shaft 33 is provided with an opening and closing indicator disk 37, and the housing 11 is provided with an opening and closing indicator hole 112 corresponding to the opening and closing indicator disk 37, and a window transparent plug 113 is provided in the opening and closing indicator hole 112. The window transparent plug is provided in the opening and closing indicator hole, and the window transparent plug can prevent dust from entering the electric operating mechanism from the opening and closing indicator hole, thereby helping to improve the protection performance of the electric operating mechanism.

[0016] The electric operation component adopts a modular structure design, which can realize the modular assembly of the electric operation component and the mechanism frame, and the assembly efficiency is higher. The cover plate protects the drive gear, the transmission gear set, and the motor gear, which can ensure the working reliability of the electric operation component. The intelligent control circuit board component adopts a modular structure design, which is convenient for the modular assembly of the intelligent control circuit board component and the mechanism frame, and the isolation plate can separate the communication circuit board from the electric operation component, which can ensure that the electric operation component and the intelligent control circuit board do not interfere with each other. The isolation plate and the cover plate are assembled in a snap-fit ​​manner, which is conducive to the modular assembly of the communication circuit board and the cover plate. Therefore, the electric operating mechanism has the advantages of simple structure, stable and reliable performance, small size, and convenient assembly.

Claims

1. An electric operating mechanism, comprising a mechanism frame, a housing arranged on the mechanism frame, an intelligent control circuit board assembly arranged on the mechanism frame, an electric operating assembly arranged on the mechanism frame, and a slider slidably arranged on the mechanism frame and driving a molded case circuit breaker handle to perform opening and closing, characterized in that: The electric operation component includes a motor arranged on a mechanism frame, a motor gear arranged on a rotating shaft of the motor, a manual operation shaft rotatably arranged on the mechanism frame, a cam which cooperates with the manual operation shaft and is used to drive the movement of the slider, a driving gear arranged on the manual operation shaft, and a transmission gear group arranged between the motor gear and the driving gear. The mechanism frame is provided with a cover plate which covers the motor gear, the transmission gear group and the driving gear. The intelligent control circuit board component includes an isolation plate arranged on the cover plate, a communication circuit board arranged on the isolation plate, a micro switch arranged on the isolation plate and cooperating with the manual operation shaft, a box body arranged on the mechanism frame, and a power supply circuit board arranged in the box body. The isolation plate is provided with a hook cooperating with the cover plate, and the cover plate is provided with a slot cooperating with the hook. The hook is engaged in the slot and constitutes a snap-fit ​​cooperation between the isolation plate and the cover plate.

2. The electric operating mechanism according to claim 1, characterized in that: The transmission gear set comprises a first transmission gear meshed with the motor gear, a second transmission gear meshed with the first transmission gear, and a third transmission gear meshed with the second transmission gear, and the third transmission gear meshes with the driving gear.

3. The electric operating mechanism according to claim 1 or 2, characterized in that: The communication circuit board is provided with an indicator light, a light guide column covering the indicator light, an indication hole is provided on the shell corresponding to the light guide column, and one end of the light guide column is inserted into the indication hole.

4. The electric operating mechanism according to claim 1 or 2, characterized in that: The manual operation shaft is provided with a convex strip matched with the micro switch. The convex strip moves with the manual operation shaft and triggers the micro switch, thereby realizing the connection or disconnection of the micro switch.

5. The electric operating mechanism according to claim 1 or 2, characterized in that: The manual operating shaft is provided with an opening and closing indicator disk, the shell body is provided with an opening and closing indicator hole at a position corresponding to the opening and closing indicator disk, and a window transparent plug is provided in the opening and closing indicator hole.

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