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, and the electric operating assembly comprises a motor, a motor gear, a manual operating shaft, a driving gear, a transmission gear set and a cam in linkage fit with the manual operating shaft. The mechanism frame is provided with a gear cover covering the motor gear, the driving gear and the transmission gear set, the mechanism frame is provided with a motor cover covering the motor, one end of the manual operation shaft is provided with a manual operation hole exposed out of the gear cover, and the manual operation shaft is provided with a switch-on and switch-off indicating dial corresponding to the manual operation hole. The intelligent control circuit board assembly comprises a power supply circuit board and a wiring terminal, a plurality of supporting columns are arranged on the gear cover, the power supply circuit board is arranged on the supporting columns, and a plurality of screws connected with the supporting columns are arranged on the power supply circuit board. 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 the electric operating component and the intelligent control circuit board component are not separated, resulting in the reliability of the electric operating component cannot be guaranteed and occupying a large space. In addition, the intelligent control circuit board component cannot be integrated modularly, and modular assembly cannot be achieved. Furthermore, 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 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 driving gear arranged on the manual operating shaft, a transmission gear set arranged between the motor gear and the driving gear, and a cam coordinated with the manual operating shaft. The mechanism frame is provided with a gear cover covering the motor gear, the driving gear, and the transmission gear set. The mechanism frame is provided with a motor cover covering the motor. One end of the manual operating shaft has a manual operating hole exposed outside the gear cover, and a closing and opening indicator plate is arranged on the manual operating shaft corresponding to the manual operating hole. The intelligent control circuit board assembly includes a power supply circuit board and a wiring terminal arranged on the power supply circuit board. A plurality of support columns are arranged on the gear cover, and the power supply circuit board is arranged on the support column. A plurality of screws connected to the plurality of support columns are arranged on the power supply circuit board.

[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 gear cover protects the transmission gear set, the motor gear, and the drive gear. The motor cover can prevent the motor from being exposed, and the protection performance is better, thereby ensuring 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 gear cover, and the gear cover can separate the power circuit board from the transmission gear set, the motor gear, and the drive gear, 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 power circuit board is provided with an indicator light, the power 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 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 indication effect of the indicator light.

[0007] 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 the second 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.

[0008] In particular, a micro switch is provided on the mechanism frame at one side corresponding to the cam, and the cam moves with the manual operating shaft and triggers the micro switch, and the micro switch is turned on or off. The micro switch can monitor the working position of the cam, thereby improving the working reliability of the electric operating mechanism.

[0009] In particular, the housing is provided with a wiring hole at a position corresponding to the wiring terminal, and the housing is provided with a protective cover plate covering the wiring hole. The housing is provided with a protective cover plate covering the wiring terminal, and the protective cover plate can play a protective role and prevent the wiring terminal from being exposed, thereby facilitating the working reliability of the electric operating mechanism.

[0010] In particular, the mechanism frame is provided with a mounting bracket matched with the housing of the molded case circuit breaker. The mechanism frame is provided with a mounting bracket, and during installation, a matching mounting bracket can be selected according to molded case circuit breakers of different specifications, thereby facilitating the assembly of the mechanism frame and the molded case circuit breaker, and the assembly is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a stereogram of an embodiment of the utility model.

[0012] Figure 2 This is an exploded view of an embodiment of the utility model.

[0013] Figure 3 This is an internal structure diagram of an embodiment of the utility model.

[0014] Figure 4 It is the front view of the internal structure of the embodiment of the utility model. DETAILED DESCRIPTION

[0015] like Figures 1 to 4As 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 molded case circuit breaker handle 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 driving gear 34 arranged on the manual operating shaft 33, a transmission gear set 35 arranged between the motor gear 32 and the driving gear 34, and a cam 36 that cooperates with the manual operating shaft 33. The mechanism frame 10 is provided with a gear cover 13 that covers the motor gear 32, the driving gear 34, and the transmission gear set 35. The mechanism frame 10 is provided with a motor cover 14 that covers the motor 31. One end of the manual operating shaft 33 has a manual operating hole 331 exposed outside the gear cover 13. The manual operating shaft 33 is provided with a switch opening and closing indicator disk 37 corresponding to the manual operating hole 331. The intelligent control circuit board assembly 20 includes a power circuit board 21 and a wiring terminal 22 arranged on the power circuit board 21. A plurality of support columns 131 are arranged on the gear cover 13. The power circuit board 21 is arranged on the support columns 131. The power circuit board 21 is provided with a plurality of screws connected to the plurality of support columns 131. The power circuit board 21 is provided with an indicator light 23, and the power circuit board 21 is provided with a light guide column 24 covering the indicator light 23. The housing 11 is provided with an indication hole 111 corresponding to the light guide column 24, and one end of the light guide column 24 is inserted into the indication hole 111. 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 beneficial to enhance the indication effect of the indicator light. The transmission gear set 35 includes a first transmission gear 351 meshed with the motor gear 32, and a second transmission gear 352 meshed with the first transmission gear 351, and the second transmission gear 352 is meshed with the driving gear 34. The motor gear can drive the driving gear through the transmission gear set, which is beneficial to improve the transmission stability of the electric operating mechanism. The mechanism frame 10 is provided with a mounting bracket 16 matched with the housing of the molded case circuit breaker. A mounting bracket is arranged on the mechanism frame. During installation, a matching mounting bracket can be selected according to molded case circuit breakers of different specifications, thereby facilitating the assembly of the mechanism frame and the molded case circuit breaker and making the assembly more convenient.

[0016] like Figure 2 and 3As shown, a micro switch 38 is provided on the mechanism frame 10 at one side corresponding to the cam 36. The cam 36 moves with the manual operation shaft 33 and triggers the micro switch 38, and the micro switch 38 is turned on or off. The micro switch can monitor the working position of the cam, which is beneficial to improve the working reliability of the electric operating mechanism. A wiring hole 112 is provided on the housing 11 at a position corresponding to the wiring terminal 22, and a protective cover plate 15 covering the wiring hole 112 is provided on the housing 11. A protective cover plate covering the wiring terminal is provided on the housing, and the protective cover plate can play a protective role and prevent the wiring terminal from being exposed, which is beneficial to improve the working reliability of the electric operating mechanism.

[0017] 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 gear cover protects the transmission gear set, motor gear, and drive gear. The motor cover can prevent the motor from being exposed, and the protection performance is better, thereby ensuring 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 gear cover. The gear cover can separate the power circuit board from the transmission gear set, motor gear, and drive gear, and 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.

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 driving gear arranged on the manual operation shaft, a transmission gear group arranged between the motor gear and the driving gear, and a cam linked with the manual operation shaft. The mechanism frame is provided with a gear cover on the motor gear, the driving gear, and the transmission gear group. The mechanism frame is provided with a motor cover covering the motor. One end of the manual operation shaft has a manual operation hole exposed outside the gear cover. A switch opening and closing indicator disk is provided on the manual operation shaft corresponding to the manual operation hole. The intelligent control circuit board component includes a power supply circuit board and wiring terminals arranged on the power supply circuit board. A plurality of support columns are arranged on the gear cover. The power supply circuit board is arranged on the support columns. A plurality of screws connected to the plurality of support columns are provided on the power supply circuit board.

2. The electric operating mechanism according to claim 1, characterized in that: The power 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.

3. The electric operating mechanism according to claim 1 or 2, 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 the second transmission gear meshed with the driving gear.

4. The electric operating mechanism according to claim 1 or 2, characterized in that: A micro switch is arranged on the mechanism frame at one side corresponding to the cam, and the cam 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 shell body is provided with a wiring hole at a position corresponding to the wiring terminal, and the shell body is provided with a protective cover plate covering the wiring hole.

6. The electric operating mechanism according to claim 1 or 2, characterized in that: The mechanism frame is provided with a mounting bracket matched with the shell of the molded case circuit breaker.

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