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 arranged on the mechanism frame, and a sliding block which is arranged on the mechanism frame in a sliding manner and drives a molded case circuit breaker handle to execute opening and closing, the intelligent control circuit board assembly comprises a box body, a power supply circuit board, a communication circuit board and an indication circuit board assembly, and the electric operation assembly comprises a motor, a motor gear, a manual operation shaft, a cam, a driving gear and a transmission gear set arranged between the motor gear and the driving gear. The mechanism frame is provided with a protective cover plate covering the motor gear and the transmission gear set, and the manual operation shaft is provided with a switch-on and switch-off indicating dial covering the driving gear. 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, and a slider slidably arranged on the mechanism frame and driving the handle of the molded case circuit breaker to perform opening and closing. The intelligent control circuit board assembly includes a box body arranged on the mechanism frame at a side corresponding to the electric operating assembly, a power circuit board arranged in the box body, a communication circuit board arranged in the box body, and an indication circuit board assembly arranged in the box body. The electric operating assembly includes a motor arranged on the mechanism frame, a motor gear arranged on the rotating shaft of the motor, a manual operating shaft rotatably arranged on the mechanism frame, a cam that cooperates with the manual operating shaft and is used to drive the movement of the slider, a driving gear arranged on the manual operating shaft, and a transmission gear group arranged between the motor gear and the driving gear. The mechanism frame is provided with a protective cover plate covering the motor gear and the transmission gear group, and the manual operating shaft is provided with an opening and closing indication disk covering the driving gear.

[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 protective cover plate protects 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 facilitates the modular assembly of the intelligent control circuit board component and the mechanism frame, and the box body can separate the power circuit board, the communication circuit board, the indication circuit board and the electric operation component, which can ensure that the electric operation component and the intelligent control circuit board do not interfere with each other. 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, a third transmission gear meshed with the second transmission gear, and a fourth transmission gear meshed with the third transmission gear, and the fourth transmission gear meshes with the driving gear. The motor gear can drive the driving gear through the transmission gear set, which is beneficial to improving the transmission stability of the electric operating mechanism.

[0007] In particular, the indicator circuit board assembly includes an indicator circuit board arranged in a box body, an indicator light arranged on the indicator circuit board, a light guide column arranged on the indicator circuit board and covering the indicator light, an indicator hole is arranged on the housing corresponding to the light guide column, and one end of the light guide column is inserted into the indicator hole. The indicator light can indicate the working state of the electric operating mechanism, and the light guide column can guide the light of the indicator light out of the housing, which is conducive to enhancing the indicating effect of the indicator light.

[0008] In particular, two hooks are provided on the box body corresponding to the two sides of the indicator light circuit board, and the two hooks are respectively engaged with the two sides of the indicator light circuit board, and constitute the engagement between the box body and the indicator light circuit board. The two hooks of the box body are engaged with the indicator light circuit board, so as to facilitate the assembly of the indicator light circuit board and the box body, and facilitate the modular assembly of the indicator circuit board assembly and the box body.

[0009] In particular, two slots are provided in the box body at the two ends of the power circuit board, and the two ends of the power circuit board are respectively inserted into the two slots, and a snap fit is formed between the power circuit board and the box body. The power circuit board and the box body are assembled in a snap fit manner, which is convenient for assembling the power circuit board and the box body, and the assembly efficiency is higher. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0011] Figure 2 This 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 housing 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 13 slidably arranged on the mechanism frame 10 and driving the handle of the molded case circuit breaker to perform opening and closing. The intelligent control circuit board assembly 20 includes a box body 21 arranged on the mechanism frame 10 at one side corresponding to the electric operating assembly 30, a power circuit board 22 arranged in the box body 21, a communication circuit board 23 arranged in the box body 21, and an indication circuit board assembly 24 arranged in the box body 21. The electric operation 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 operation shaft 33 rotatably arranged on the mechanism frame 10, a cam 34 that cooperates with the manual operation shaft 33 and is used to drive the slider 13 to move, a driving gear 35 arranged on the manual operation shaft 33, and a transmission gear set 36 arranged between the motor gear 32 and the driving gear 35. The mechanism frame 10 is provided with a protective cover plate 12 covering the motor gear 32 and the transmission gear set 36, and the manual operation shaft 33 is provided with an opening and closing indicator plate 37 covering the driving gear 35. 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, a third transmission gear 363 meshed with the second transmission gear 362, and a fourth transmission gear 364 meshed with the third transmission gear 363, and the fourth transmission gear 364 meshed with the driving gear 35. The motor gear can drive the driving gear through the transmission gear set, which is beneficial to improving the transmission stability of the electric operating mechanism.

[0015] like Figure 2 and 3As shown, the indicating circuit board assembly 24 comprises an indicating circuit board 241 arranged in the box body 21, an indicating light 242 arranged on the indicating circuit board 241, and a light guide column 243 arranged on the indicating circuit board 241 and covering the indicating light 242. The housing 11 is provided with an indicating hole 111 corresponding to the light guide column 243, and one end of the light guide column 243 is inserted into the indicating hole 111. The indicating light can indicate the working state of the electric operating mechanism, and the light guide column can guide the light of the indicating light out of the housing, which is beneficial to enhance the indicating effect of the indicating light. Two hooks 211 are arranged on the box body 21 at both sides corresponding to the indicating circuit board 241, and the two hooks 211 are respectively engaged on both sides of the indicating circuit board 241, and constitute the engaging cooperation between the box body 21 and the indicating circuit board 241. The two hooks of the box body are engaged on the indicating circuit board, so as to facilitate the assembly of the indicating circuit board and the box body, and to realize the modular assembly of the indicating circuit board assembly and the box body. Two slots 212 are provided in the box body 21 at the two ends of the power circuit board 22. The two ends of the power circuit board 22 are respectively inserted into the two slots 212, and the power circuit board 22 and the box body 21 are snap-fitted. The power circuit board and the box body are assembled in a snap-fitting manner, which is convenient for assembling the power circuit board and the box body, and the assembly efficiency is higher.

[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 protective cover plate protects 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 box body can separate the power circuit board, communication circuit board, indication circuit board and electric operation component, which can ensure that the electric operation component and the intelligent control circuit board do not interfere with each other. Therefore, the electric operation 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 intelligent control circuit board assembly includes a box body arranged on a mechanism frame at a side corresponding to the electric operation assembly, a power circuit board arranged in the box body, a communication circuit board arranged in the box body, and an indication circuit board assembly arranged in the box body. The electric operation assembly includes a motor arranged on the mechanism frame, a motor gear arranged on the rotating shaft of the motor, a manual operation shaft arranged on the mechanism frame for rotation, a cam that 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 protective cover plate covering the motor gear and the transmission gear group, and the manual operation shaft is provided with an opening and closing indicator disk covering the driving gear.

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

3. The electric operating mechanism according to claim 1 or 2, characterized in that: The indicating circuit board assembly includes an indicating light circuit board arranged in a box body, an indicating light arranged on the indicating light circuit board, and a light guide column arranged on the indicating light circuit board and covering the indicating light. An indicating hole is arranged on the shell body corresponding to the light guide column, and one end of the light guide column is inserted into the indicating hole.

4. The electric operating mechanism according to claim 3, characterized in that: Two hooks are arranged on the box body corresponding to the two sides of the indicator light circuit board. The two hooks are respectively engaged with the two sides of the indicator light circuit board to form a snap-fitting fit between the box body and the indicator light circuit board.

5. The electric operating mechanism according to claim 1 or 2, characterized in that: Two slots are arranged in the box body at the two ends corresponding to the power circuit board. The two ends of the power circuit board are respectively inserted into the two slots to form a snap-fitting fit between the power circuit board and the box body.

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