CN115295372A

CN115295372A - Closing mechanism of circuit breaker and circuit breaker

Info

Publication number: CN115295372A
Application number: CN202211023465.XA
Authority: CN
Inventors: 李海茭; 许利战; 祁卫华; 史胜余; 黄东
Original assignee: Delixi Electric Co Ltd
Current assignee: Delixi Electric Co Ltd
Priority date: 2022-08-25
Filing date: 2022-08-25
Publication date: 2022-11-04

Abstract

The embodiment of the application provides a closing mechanism and circuit breaker of circuit breaker, closing mechanism includes: motor, gear drive, driving medium, rolling disc and operating device. The gear transmission mechanism comprises a multi-stage gear assembly which is meshed in sequence, and the motor is used for driving the gear transmission mechanism to rotate step by step to drive the transmission piece to rotate. The transmission part drives the rotating disc to rotate, the rotating disc drives the operating mechanism to rotate, and the operating mechanism drives the moving contact to move towards the fixed contact, so that closing is realized. Through the multistage transmission process, the output of small load force of the motor can be realized, and the torque input of a large operating mechanism is obtained, so that the closing is more stable and reliable. And moreover, the automatic closing and the manual closing have a shared structure, so that not only can the space be saved, but also the transmission ratio in the automatic closing process can be further increased.

Description

Closing mechanism of circuit breaker and circuit breaker

Technical Field

The embodiment of the application relates to the field of circuit breakers, in particular to a closing mechanism of a circuit breaker and the circuit breaker.

Background

The circuit breaker is a switching device capable of opening, closing, carrying, and breaking a current under a normal circuit condition, and closing, carrying, and breaking a current under an abnormal circuit condition within a prescribed time.

The prior art plug-in circuit breaker is mainly switched on through manual control, but with the development of the internet of things technology, the prior plug-in circuit breaker cannot meet the requirements of remote monitoring and control, and therefore, a circuit breaker capable of automatically switching on is needed to be provided.

Disclosure of Invention

In view of the above problems, embodiments of the present application provide a closing mechanism of a circuit breaker and a circuit breaker, which overcome or at least partially solve the above problems that when closing, the requirements of remote monitoring and control cannot be met, it is difficult to provide a large transmission torque, and automatic and reliable closing is achieved.

In a first aspect of an embodiment of the present application, a closing mechanism of a circuit breaker is provided, where the closing mechanism includes: motor, gear drive mechanism, driving medium, rolling disc and operating device. The gear transmission mechanism comprises a multistage gear assembly which is meshed in sequence, the motor is used for driving the gear transmission mechanism to rotate step by step to drive the transmission part to rotate, the transmission part drives the rotating disc to rotate, the rotating disc drives the operating mechanism to rotate, and the operating mechanism drives the moving contact to move towards the static contact to realize closing.

In this application embodiment, drive gear drive through the motor and rotate step by step, gear drive drives the transmission piece and rotates. The transmission part drives the rotating disc to rotate, and the rotating disc drives the operating mechanism to rotate, so that the moving contact is driven to move towards the fixed contact. Through the multistage transmission process, the output of small load force of the motor can be realized, and the torque input of a large operating mechanism is obtained, so that the closing is more stable and reliable.

In an alternative form, the last gear member of the gear transmission is provided with a first sector gear and the transmission member is provided with a second sector gear. Before the switching-on begins, the first sector gear is located at a first initial position, the second sector gear is located at a second initial position, and the first sector gear and the second sector gear are in a disengaged state. After the switching-on is started, the first sector gear rotates to a first set position, and the first sector gear is meshed with the second sector gear. After closing is finished, after the first sector gear and the second sector gear are disengaged, the first sector gear continues to rotate to a first closing finishing position.

Through set up the second sector gear with first sector gear engaged with on the driving medium, set up matched with on last level gear spare and driving medium and support and push away the structure relatively, can make the combined floodgate process more stable. And before the switching-on begins, the first sector gear is located at a first initial position, and after the switching-on is finished, the first sector gear continues to rotate to a first switching-on finishing position. Under above-mentioned two states, first sector gear and second sector gear all are in the disengagement state, consequently, the switching-on process is difficult for receiving the interference of other structures in the circuit breaker.

In an alternative form, the multiple gear assembly includes four gear assemblies, first, second, third and fourth gear members, which mesh in sequence. The gear ratio of the engaged two gear members is greater than 1, and the fourth gear member is configured as the last gear member.

The multistage gear assembly can provide large transmission torque required when the breaker is switched on. Setting the transmission ratio of the engaged two-stage gear member to be greater than 1 makes it possible to make the load force output from the motor smaller.

In an alternative mode, the second gear member and the third gear member each include a gearwheel and a pinion coaxially arranged, the first gear member meshes with the gearwheel of the second gear member, the pinion of the second gear member meshes with the gearwheel of the third gear member, and the pinion of the third gear member meshes with the fourth gear member.

The second gear part and the third gear part are arranged to comprise a large gear and a small gear which are coaxially arranged, when the multistage gear assembly rotates, the small gear of the previous stage can drive the large gear of the next stage to rotate, and the transmission ratio of the two stages of gear parts which are meshed with each other is larger than 1.

In an optional manner, the closing mechanism further includes a handle. The transmission part is connected with the handle through the handle connecting rod, and the transmission part drives the handle to rotate to a switch-on position through the handle connecting rod.

The transmission part is connected with the handle through the handle connecting rod, so that a shared structure exists between automatic switching-on and manual switching-on, the space can be saved, and the transmission ratio of the automatic switching-on process can be further increased. In addition, when the transmission part rotates, the handle can be driven to rotate through the handle connecting rod, and a user can conveniently observe whether the circuit breaker is in a closing state.

In a second aspect of embodiments of the present application, there is provided a circuit breaker, including: PCB and this application first aspect provide a closing mechanism. The PCB is electrically connected with a motor in a closing mechanism of the circuit breaker, and the PCB is used for supplying power to the motor.

Through PCB to the motor power supply, in the circuit breaker, the motor need not additionally be connected with the power through the wire for the internal integration of circuit breaker is higher, and the power supply of motor is more stable.

In an optional mode, the circuit breaker further comprises a closing detection part, the closing detection part is used for sending a first closing detection signal when the circuit breaker is detected to be closed, and the remote control module controls the motor to stop rotating according to the first closing detection signal.

By arranging the closing detection piece, whether the moving contact is contacted with the fixed contact or not can be judged according to the voltage condition in the closing detection piece. Furthermore, the rotation condition of the motor is controlled, and the possibility of misoperation of the circuit breaker provided by the embodiment of the application is reduced.

In an optional mode, the PCB includes a closing microswitch, the closing microswitch is disposed at a first position below the transmission member, and the transmission member is provided with a first contact member. The closing microswitch is used for sending a second closing detection signal when the first contact element rotates to a first position and contacts with the closing microswitch, and the remote control module controls the motor to stop rotating according to the second closing detection signal.

After the circuit breaker is switched on, the first contact piece on the transmission piece is contacted with a switching-on microswitch arranged on the PCB at a first position, so that whether the circuit breaker is in a switching-on state or not can be detected, and the rotation condition of the motor is further controlled. The remote control module controls the motor to stop rotating according to the first closing detection signal and/or the second closing detection signal, and therefore the accuracy of closing state detection can be improved.

In an optional mode, the PCB includes a closing micro switch disposed at a second position below the rotating disc, and the rotating disc is provided with a second contact. The closing microswitch is used for sending a second closing detection signal when the second contact element rotates to a second position and contacts with the closing microswitch, and the remote control module controls the motor to stop rotating according to the second closing detection signal.

After the circuit breaker is switched on, the second contact piece on the rotating disc is in contact with a switching-on microswitch arranged on the PCB at a second position, and whether the circuit breaker is in a switching-on state or not can be detected, so that the rotation condition of the motor is controlled. The remote control module controls the motor to stop rotating according to the first closing detection signal and/or the second closing detection signal, and the accuracy of closing state detection can be improved.

In an alternative mode, the circuit breaker provided by the embodiment of the application is a plug-in circuit breaker.

The plug-in circuit breaker that this application embodiment provided, small, the overall arrangement is compact, and can increase drive ratio and transmission moment of torsion, realizes stable combined floodgate.

The foregoing description is only an overview of the technical solutions of the embodiments of the present application, and in order that the technical means of the embodiments of the present application can be clearly understood, the embodiments of the present application are specifically described below in order to make the foregoing and other objects, features, and advantages of the embodiments of the present application more clearly understandable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic diagram of a closing mechanism of a circuit breaker in a closing state according to an embodiment of the present application.

Fig. 2 is a schematic diagram of a circuit breaker including a closing microswitch and being after closing according to an embodiment of the present disclosure.

Fig. 3 is a schematic view of a closing detection part provided in an embodiment of the present application.

Fig. 4 is a schematic diagram of a circuit breaker including a closing microswitch and before closing according to an embodiment of the present disclosure.

Description of reference numerals:

01. a motor; 021. a first gear member; 022. a second gear member; 023. a third gear member; 024. a fourth gear member; 03. a transmission member; 031. a second sector gear; 04. rotating the disc; 05. an operating mechanism; 06. a moving contact; 07. static contact; 08. a first linkage; 09. a second linkage; 10. a handle; 11. a handle link; 12. a first sector gear; 13. a PCB; 141. a conductive member; 142. a spring; 143. fixing a column; 15. a static arc striking angle; 16. a microswitch is switched on; 17. a first contact member.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

The terms "comprising" and "having," and any variations thereof, in the description and claims of this application and in the description of the figures are intended to cover, but not exclude, other things. The word "a" or "an" does not exclude the presence of a plurality.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The following description is given with the directional terms shown in the drawings, and is not intended to limit the closing mechanism of the circuit breaker and the specific structure of the circuit breaker of the present application. For example, in the description of the present application, the terms "upper", "lower", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like in the description and claims of the present application or in the above-described drawings are used for distinguishing between different objects and not necessarily for describing a particular sequential order, and may explicitly or implicitly include one or more of the features.

In the description of the present application, unless otherwise specified, "plurality" means two or more (including two), and similarly, "plural groups" means two or more (including two).

In the description of the present application, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., "connected" or "connected" of a mechanical structure may refer to a physical connection, e.g., a physical connection may be a fixed connection, e.g., a fixed connection by a fastener, such as a screw, bolt, or other fastener; the physical connection can also be a detachable connection, such as a mutual snap-fit or snap-fit connection; the physical connection may also be an integral connection, for example, a connection made by welding, gluing or integrally forming the connection. "connected" or "connected" of circuit structures may mean not only physically connected but also electrically connected or signal-connected, for example, directly connected, i.e., physically connected, or indirectly connected through at least one intervening component, as long as the circuits are in communication, or communication between the interiors of two components; signal connection may refer to signal connection through a medium, such as radio waves, in addition to signal connection through circuitry. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Some embodiments of the present application provide a closing mechanism of a circuit breaker and a circuit breaker, please refer to fig. 1 and fig. 2. Fig. 1 is a schematic diagram of a closing mechanism of a circuit breaker in a closed state according to an embodiment of the present disclosure, and fig. 2 is a schematic diagram of the circuit breaker including a closing microswitch and being in a closed state according to the embodiment of the present disclosure.

As shown in fig. 1 and fig. 2, a closing mechanism of a circuit breaker according to an embodiment of the present application includes: motor 01, gear drive, driving medium 03, rolling disc 04 and operating mechanism 05.

The motor 01 is used for driving the gear transmission mechanism to rotate, and the gear transmission mechanism rotates to drive the transmission piece 03 to rotate. The transmission part 03 rotates to drive the rotating disc 04 to rotate, and the rotating disc 04 rotates to drive the operating mechanism 05 to rotate, so that the switch-on is realized.

Wherein, gear drive includes the multistage gear subassembly that meshes in proper order, and the multistage gear subassembly can include a plurality of gear parts that mesh in proper order for transmit the load power of motor 01 output to operating device 05 step by step. The motor 01 is used for driving the gear transmission mechanism to rotate step by step and driving the transmission part 03 to rotate. The transmission part 03 drives the rotating disc 04 to rotate, and the rotating disc 04 drives the operating mechanism 05 to rotate. The operating mechanism 05 drives the moving contact 06 to move towards the static contact 07, so that closing is realized.

In one possible approach, the multistage gear assembly is configured as a four-stage gear assembly that sequentially meshes, namely, a first gear 021, a second gear 022, a third gear 023 and a fourth gear 024, considering the space limitation inside the circuit breaker and the transmission torque required during the closing of the driving operation mechanism 05. The transmission ratio of the two meshed gear pieces is greater than 1, so that the load force output by the motor 01 is smaller, and a larger transmission torque required by the circuit breaker to realize closing is provided.

In practical applications, to achieve a gear ratio of the engaged two-stage gear members greater than 1, the second gear member 022 and the third gear member 023 may each include a bull gear and a pinion gear that are coaxially arranged. The first gear member 021 meshes with the bull gear of the second gear member 022, the pinion gear of the second gear member 022 meshes with the bull gear of the third gear member 023, and the pinion gear of the third gear member 023 meshes with the fourth gear member 024.

The second gear 022 and the third gear 023 are arranged to include a gear wheel and a pinion which are coaxially arranged, and when the multistage gear assembly rotates, the motor 01 outputs a smaller load force to drive the gear wheel of the second gear 022 to rotate. The small gear of the second gear member 022 continues to rotate with a small force to drive the large gear of the third gear member 023 to rotate. The rotation of the pinion gear of the third gear member 023 causes the rotation of the fourth gear member 024 again with a small force. Therefore, the pinion of the previous stage is utilized for multiple times to drive the bull gear of the next stage to rotate, the transmission torque required in the switching-on process can be met, the layout between the gear pieces is compact, and the purpose of saving space can be achieved.

In practical applications, the transmission element 03 and the rotary disk 04 can be connected by a first connecting rod 08, and the rotary disk 04 and the operating element 05 can be connected by a second connecting rod 09.

The transmission member 03 and the rotating disk 04 are connected by a first link mechanism 08, which may be a first through hole provided on the transmission member 03 and a second through hole provided on the rotating disk 04. The first end of the first linkage 08 is movably connected to the transmission element 03 via a first through hole. The second end of the first linkage 08 is movably or fixedly connected to the rotating disc 04 via a second through hole. The first link device 08 may be formed by combining a plurality of links.

The connection between the rotating disc 04 and the operating mechanism 05 through the second link device 09 can refer to the connection between the transmission member 03 and the rotating disc 04 through the first link device 08, which is not described in detail in this embodiment.

In the embodiment of the present application, the gear transmission mechanism is driven by the motor 01 to rotate step by step, and the gear transmission mechanism drives the transmission member 03 to rotate. The transmission part 03 drives the rotating disc 04 to rotate, the rotating disc 04 drives the operating mechanism 05 to rotate, and then the moving contact 06 is driven to move towards the static contact 07. Through the multistage transmission process, the output of a small load force of the motor 01 can be realized, and the torque input of a large operating mechanism 05 is obtained, so that the switch-on is more stable and reliable, and the requirements of remote monitoring and control are met.

In an embodiment, in order to facilitate a user to observe whether the closing mechanism of the circuit breaker provided in the above embodiments is automatically closed in place, the closing mechanism provided in the embodiments of the present application may further include a handle 10. The transmission part 03 is further connected with the handle 10 through the handle connecting rod 11, and the transmission part 03 drives the handle 10 to rotate to the switching-on position through the handle connecting rod 11.

In the exemplary embodiment, the handle 10 is connected to the transmission part 03 via a handle link 11, and the transmission part 03 is also connected to the rotary disk 04 via a first linkage 08. The rotating disc 04 is connected with the operating mechanism 05 through the second connecting rod device 09, and the operating mechanism 05 can drive the moving contact 06 to move towards the fixed contact 07, or the operating mechanism 05 drives the moving contact 06 to move away from the fixed contact 07.

It can be understood that the transmission part 03 is connected with the handle 10 through the handle connecting rod 11, so that the automatic closing and the manual closing have a shared structure, the space can be saved, and the transmission ratio of the automatic closing process can be further increased. In addition, in the automatic switching-on process, when the transmission part 03 rotates, the handle 10 can be driven to rotate through the handle connecting rod 11, so that a user can conveniently observe whether the circuit breaker is in a switching-on state.

In one embodiment, in consideration of the fact that a partial structure is shared when the automatic closing and the manual closing are implemented, in order to avoid interference of the manual closing process to the automatic closing process, the gear transmission mechanism may be provided with the first sector gear 12. For example, the first sector gear 12 is provided on the last stage gear member of the gear transmission mechanism, wherein the fourth gear member 024 may be configured as the last stage gear member. The transmission member 03 is provided with a second sector gear 031.

Before the automatic closing starts, the first sector gear 12 is located at the first initial position, and the second sector gear 031 is located at the second initial position, and the first sector gear 12 and the second sector gear 031 are in a disengaged state. Therefore, when the handle 10 is rotated to perform a switching-off operation or a switching-on operation, the handle 10 drives the transmission member 03 to rotate through the handle link 11, and the second sector gear 031 does not mesh with the first sector gear 12. Furthermore, the automatic closing process cannot be interfered.

After the automatic closing is started, the first sector gear 12 rotates to the first setting position, and the first sector gear 12 is meshed with the second sector gear 031. Then, the rotating disc 04 and the operating mechanism 05 are driven to rotate in sequence, and the moving contact 06 moves towards the fixed contact 07, so that automatic closing is realized.

After the automatic closing is completed, the first sector gear 12 continues to rotate to the first closing end position to be away from the second sector gear 031 after the first sector gear 12 and the second sector gear 031 are disengaged. At this time, when the handle 10 is rotated to perform the opening or closing operation, the handle 10 drives the transmission member 03 to rotate through the handle link 11, and the second sector gear 031 is not engaged with the first sector gear 12. Furthermore, the automatic closing process cannot be interfered.

Therefore, by providing the second sector gear 031 engaged with the first sector gear 12 on the transmission member 03, the closing process can be more stable than providing a matching abutting structure on the last gear member and the transmission member 03. Before the start of the closing, the first sector gear 12 is located at the first initial position, and after the closing is completed, the first sector gear 12 continues to rotate to the first closing completion position. Under above-mentioned two states, first sector gear 12 all is in the disengagement state with second sector gear 031, consequently, automatic switching-on process is difficult for receiving the interference of other inside structures of circuit breaker.

In one embodiment, the present application further provides a Circuit breaker, and referring to fig. 1, the Circuit breaker may include a Printed Circuit Board (PCB) 13 and a closing mechanism of the Circuit breaker provided in the above embodiment. The PCB13 is electrically connected with a motor 01 in a closing mechanism of the circuit breaker, and the PCB13 is used for supplying power to the motor 01. Like this, motor 01 need not additionally be connected with the power through the wire for the internal integration of circuit breaker is higher, and motor 01's power supply is more stable.

In the process of automatic switching on of the circuit breaker, the moving contact 06 and the fixed contact 07 may be bonded, and the moving contact 06 and the fixed contact 07 may also have a fault and cannot be switched on. At this time, if the motor 01 is continuously controlled to rotate to perform automatic closing, the circuit breaker provided in the embodiment of the present application may be damaged. Therefore, in an embodiment, the circuit breaker further includes a closing detection component, and referring to fig. 3, fig. 3 is a schematic diagram of the closing detection component provided in the embodiment of the present application. The closing detection piece is used for sending a first closing detection signal when detecting the closing of the circuit breaker, and the remote control module controls the motor 01 to stop rotating according to the first closing detection signal.

As shown in fig. 3, the closing detector includes a conductive member 141, a spring 142, and a fixing post 143. The conductive member 141 is disposed on the PCB13, and the fixing post 143 is fixed to the circuit breaker body. The spring 142 may be a torsion spring, and is sleeved on the fixing post 143. The first end of the spring 142 contacts with the conductive member 141, the second end of the spring 142 contacts with the static arc ignition angle 15, and the static arc ignition angle 15 is connected with the static contact 07.

Specifically, when the moving contact 06 contacts the fixed contact 07, a voltage loop can be formed inside the circuit breaker, and the closing detection element has a voltage value and sends a first closing detection signal to the remote control module. The remote control module can control the motor 01 to stop rotating according to a first closing detection signal of the closing detection piece. Correspondingly, when the moving contact 06 and the fixed contact 07 are separated, an open circuit is formed inside the circuit breaker, and no voltage value exists on the closing detection part, so that a first closing detection signal cannot be sent to the remote control module.

In this embodiment, by providing the closing detection element, whether the moving contact 06 and the static contact 07 are in contact with each other can be determined according to a voltage condition in the closing detection element. Furthermore, the rotation condition of the motor 01 is controlled, and the possibility of misoperation of the breaker provided by the embodiment of the application is reduced.

Further, in the closing process, if a gear transmission mechanism, a transmission member 03, a rotating disc 04 or the like fails, the closing process is affected. At this time, it is not accurate to detect whether the breaker is in a closing state only by the closing detection part.

Based on this, referring to fig. 2 and 4, the pcbs13 may include a closing microswitch 16. The closing microswitch 16 is arranged at a first position below the transmission member 03. The transmission member 03 is provided with a first contact member 17. The closing microswitch 16 is used for sending a second closing detection signal when the first contact member 17 rotates to the first position and contacts with the closing microswitch 16, and the remote control module controls the motor 01 to stop rotating according to the second closing detection signal.

Specifically, the motor 01 rotates counterclockwise, and the driving gear transmission mechanism rotates step by step to drive the first sector gear 12 to rotate clockwise and engage with the second sector gear 031, so as to drive the transmission member 03 and the first contact member 17 disposed on the transmission member 03 to rotate counterclockwise. After closing, the transmission member 03 does not rotate any more. The first contact member 17 is in contact with the closing microswitch 16 at a first position, the closing microswitch 16 sends a second closing detection signal to the remote control module, the second closing detection signal is used for informing the remote control module, and the circuit breaker is in a closing state, so that the remote control module controls the motor 01 to stop rotating according to the second closing detection signal.

After the circuit breaker is switched on, the first contact member 17 on the transmission member 03 contacts with a switching-on microswitch 16 arranged on the PCB13 at a first position, so that whether the circuit breaker is in a switching-on state can be detected, and the rotation condition of the motor 01 can be controlled. The remote control module controls the motor 01 to stop rotating according to the first closing detection signal and/or the second closing detection signal, and therefore the accuracy of closing state detection can be improved.

In practical applications, the closing microswitch 16 may also be arranged at a second position (not shown in the figure) below the rotating disc 04, and the rotating disc 04 is provided with a second contact piece. The closing microswitch 16 is used for sending a second closing detection signal when the second contact element rotates to a second position and contacts with the closing microswitch 16, and the remote control module controls the motor 01 to stop rotating according to the second closing detection signal.

Specifically, the motor 01 rotates counterclockwise, and the driving gear transmission mechanism rotates step by step to drive the first sector gear 12 to rotate clockwise and engage with the second sector gear 031, so as to drive the transmission member 03 to rotate counterclockwise. After the transmission member 03 rotates, the first link 08 may drive the rotating disk 04 and the second contact member disposed on the rotating disk 04 to rotate clockwise. After closing, the rotating disc 04 does not rotate any more, the second contact element is in contact with the closing microswitch 16 at the second position, the closing microswitch 16 sends a second closing detection signal to the remote control module, the second closing detection signal is used for informing the remote control module, and the circuit breaker is in a closing state, so that the remote control module controls the motor 01 to stop rotating according to the second closing detection signal.

It can be seen that after the circuit breaker is switched on, the second contact element of the rotating disc 04 is in contact with the switching-on microswitch 16 arranged on the PCB13 at the second position, and it can also be detected whether the circuit breaker is in a switching-on state, so as to control the rotation of the motor 01. The remote control module controls the motor 01 to stop rotating according to the first closing detection signal and/or the second closing detection signal, and the accuracy of closing state detection can be improved.

A possible closing process of the circuit breaker provided by the present application is described below with reference to the foregoing embodiments.

After receiving the closing instruction of the remote control module, the driving motor 01 rotates, for example, the driving motor 01 rotates counterclockwise, and the motor 01 drives the first gear part 021 to rotate counterclockwise. The first gear part 021 drives the bull gear of the second gear part 022 to rotate clockwise, and the pinion gear of the second gear part 022 located below the bull gear of the second gear part 022 drives the bull gear of the third gear part 023 to rotate counterclockwise. The pinion gear of the third gear member 023, which is located above the bull gear of the third gear member 023, drives the fourth gear member 024 to rotate clockwise, which in turn drives the first sector gear 12 to rotate clockwise. The first sector gear 12 rotates to the first setting position, and engages with the second sector gear 031, so as to drive the transmission member 03 to rotate counterclockwise.

After the transmission member 03 rotates, the first link device 08 may drive the rotating disc 04 to rotate clockwise. The rotating disk 04 can drive the operating mechanism 05 to rotate by means of the second linkage 09, for example, the operating mechanism 05 can be driven to rotate clockwise. The operating mechanism 05 drives the moving contact 06 to rotate clockwise, and the moving contact 06 moves towards the fixed contact 07, so that closing is realized. The circuit breaker can form a voltage loop inside, and the closing detection piece has a voltage value and sends a first closing detection signal to the remote control module. The first contact member 17 rotates to a first position, contacts the closing microswitch 16, and sends a second closing detection signal. The remote control module controls the motor 01 to stop rotating according to the first closing detection signal and/or the second closing detection signal.

The driving member 03 further drives the handle 10 to rotate to the switching-on position through the handle link 11.

After the closing is finished, the first sector gear 12 continues to rotate to the first closing end position after the first sector gear 12 and the second sector gear 031 are disengaged, so as to be away from the second sector gear 031.

At this time, the handle 10 can be rotated to the opening position, the handle 10 drives the transmission member 03 to rotate clockwise through the handle link 11, and the second sector gear 031 rotates to the second initial position to wait for the next engagement with the first sector gear 12. After the transmission part 03 rotates, the first link device 08 may drive the rotating disc 04 to rotate counterclockwise. The rotary disk 04 can drive the operating mechanism 05 to rotate counterclockwise via the second linkage 09. The operating mechanism 05 drives the moving contact 06 to rotate anticlockwise, and the moving contact 06 is far away from the static contact 07, so that brake separation is realized. And waiting for receiving a closing instruction of the next remote control module.

Or after the closing is finished, the first sector gear 13 continues to rotate to the first closing end position, and waits for receiving the opening instruction of the remote control module. And after the switching-off is realized, waiting for receiving a switching-on instruction of the next remote control module.

In an alternative mode, the circuit breaker provided by the embodiment of the application is a plug-in circuit breaker, and the plug-in circuit breaker can be of a rectangular structure.

The plug-in circuit breaker that this application embodiment provided, small, the overall arrangement is compact, and can increase drive ratio and transmission moment of torsion for the closing process is more reliable and more stable.

Those of skill in the art will understand that while some embodiments herein include certain features included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. The utility model provides a closing mechanism of circuit breaker which characterized in that, closing mechanism includes:

the device comprises a motor, a gear transmission mechanism, a transmission piece, a rotating disc and an operating mechanism;

the gear transmission mechanism comprises a multistage gear assembly which is meshed in sequence, the motor is used for driving the gear transmission mechanism to rotate step by step to drive the transmission part to rotate, the transmission part drives the rotating disc to rotate, the rotating disc drives the operating mechanism to rotate, and the operating mechanism drives the moving contact to move towards the fixed contact, so that closing is realized.

2. The switching-on mechanism according to claim 1, wherein a last stage gear member of the gear transmission mechanism is provided with a first sector gear, and the transmission member is provided with a second sector gear;

before switching on, the first sector gear is located at a first initial position, the second sector gear is located at a second initial position, and the first sector gear and the second sector gear are in a disengaged state;

after the switching-on is started, the first sector gear rotates to a first set position, and the first sector gear is meshed with the second sector gear;

after closing is finished, after the first sector gear and the second sector gear are disengaged, the first sector gear continues to rotate to a first closing finishing position.

3. The closing mechanism according to claim 2, wherein the multistage gear assembly comprises a first gear member, a second gear member, a third gear member and a fourth gear member which are meshed in sequence, the transmission ratio of the meshed two-stage gear members is greater than 1, and the fourth gear member is configured as the last-stage gear member.

4. The switching mechanism according to claim 3, wherein the second gear and the third gear each include a gear wheel and a pinion, the gear wheels are coaxially disposed, the first gear is engaged with the gear wheel of the second gear, the pinion of the second gear is engaged with the gear wheel of the third gear, and the pinion of the third gear is engaged with the fourth gear.

5. The closing mechanism of claim 1, further comprising a handle; the transmission part is connected with the handle through a handle connecting rod, and the transmission part drives the handle to rotate to a switching-on position through the handle connecting rod.

6. A circuit breaker comprising a printed circuit board PCB and a closing mechanism of the circuit breaker of any one of claims 1-5;

the PCB is electrically connected with a motor in a closing mechanism of the circuit breaker, and the PCB is used for supplying power to the motor.

7. The circuit breaker according to claim 6, wherein the circuit breaker further comprises a closing detection component, the closing detection component is configured to send a first closing detection signal when detecting that the circuit breaker is closed, and the remote control module controls the motor to stop rotating according to the first closing detection signal.

8. The circuit breaker of claim 6, wherein the PCB includes a closing micro-switch disposed at a first location below the transmission member, the transmission member having a first contact disposed thereon;

the closing microswitch is used for sending a second closing detection signal when the first contact element rotates to the first position and contacts with the closing microswitch, and the remote control module controls the motor to stop rotating according to the second closing detection signal.

9. The circuit breaker of claim 6, wherein the PCB includes a closing micro switch disposed at a second location below the turn disc, the turn disc having a second contact disposed thereon;

the closing microswitch is used for sending a second closing detection signal when the second contact element rotates to the second position and contacts with the closing microswitch, and the remote control module controls the motor to stop rotating according to the second closing detection signal.

10. The circuit breaker of claim 6, wherein the circuit breaker is a plug-in circuit breaker.