A motor circuit breaker

Abstract

The present application provides a motor circuit breaker, which belongs to the technical field of electrical equipment. The motor circuit breaker includes: a shell and an auxiliary alarm module. The shell is provided with a slot, and a driving component is provided inside the shell. The auxiliary alarm module includes a shell, a wiring component and a contact switching rod. The shell is inserted into the slot, and a wiring groove is provided on the side wall of the shell, and the wiring groove is exposed from the shell. The movable contact can abut or separate from the stationary contact. The contact switching rod cooperates with the driving component, and the contact switching rod abuts the movable contact. The driving component drives the contact switching rod to rotate, and the contact switching rod drives the movable contact to abut or separate from the stationary contact, so that the external indicator indicates the current state of the circuit breaker. The present application installs part of the auxiliary alarm module inside the shell through the slot, saving the space required when the motor circuit breaker is installed in the distribution cabinet. The wiring groove is exposed from the shell so that the auxiliary alarm module can be normally connected to the external conductive part.

Description

Technical Field

[0001] The present application relates to the technical field of electrical equipment, and in particular to a motor circuit breaker. Background Art

[0002] In modern industrial production and electrical systems, the stability and safety of motors as a core power equipment are of vital importance. In order to ensure the safe operation of motors, motor circuit breakers came into being and became an indispensable electrical protection device.

[0003] Since the motor circuit breaker has the function of manual operation, when the power circuit is disconnected, it is impossible to determine from the system whether it is a power circuit failure or a manual disconnection operation. In order to solve this problem, an auxiliary alarm module is generally set to assist users in making judgments.

[0004] In the prior art, a motor circuit breaker generally needs to be installed in a sealed distribution cabinet for use, and an additional auxiliary alarm module makes the installation of the motor circuit breaker more difficult. Therefore, a motor circuit breaker is urgently needed to solve the above problem. Summary of the invention

[0005] The present application provides a motor circuit breaker to reduce the difficulty of installing the motor circuit breaker in a power distribution cabinet.

[0006] In a first aspect, the present application provides a motor circuit breaker, which includes: a housing and an auxiliary alarm module. The housing is provided with a slot, and a drive assembly is provided in the housing. The auxiliary alarm module includes a housing, a wiring assembly, and a contact switching rod. The housing is provided with a receiving chamber, the wiring assembly is provided in the receiving chamber, and the contact switching rod is partially provided in the receiving chamber. The housing is plugged into the slot, and a wiring slot is provided on the side wall of the housing, and the wiring slot is exposed from the housing. The wiring assembly includes a wiring terminal, a stationary contact, and a movable contact, the wiring terminal is opposite to the wiring slot, the wiring terminal is used to be electrically connected to an external indicator, and the movable contact can abut or separate from the stationary contact. The part of the contact switching rod located outside the receiving chamber cooperates with the drive assembly, and the contact switching rod abuts against the movable contact. The drive assembly drives the contact switching rod to rotate, and the contact switching rod drives the movable contact to abut or separate from the stationary contact, so that the external indicator indicates the current state of the circuit breaker.

[0007] Through the above scheme, the present application sets a slot on the shell, and some auxiliary alarm modules can be installed inside the shell through the slot. In this way, it is no longer necessary to install the auxiliary alarm module on the outer wall of the shell of the motor circuit breaker by external connection, which saves the space required for the motor circuit breaker to be installed in the power distribution cabinet and reduces the difficulty of installing the motor circuit breaker in the power distribution cabinet. Setting a wiring slot on the shell and exposing the wiring slot to the shell can ensure that after the auxiliary alarm module is installed in the shell, it will not affect the normal use of the auxiliary alarm module.

[0008] A driving assembly is arranged inside the shell, and the part of the contact switching rod located outside the accommodating cavity is cooperated with the driving assembly, and the contact switching rod is made to abut against the movable contact. The driving assembly can drive the contact switching rod to make the current inside the wiring assembly conductive or disconnected, so that the detection effect of the auxiliary alarm module can be more accurate. When the internal state of the motor circuit breaker changes, the auxiliary alarm module can respond immediately, so that the operator can judge the disconnection state of the motor circuit breaker immediately.

[0009] In one possible design, the wiring assembly includes a first wiring group, the contact switching rod includes a first switching rod, and the drive assembly includes a first drive group. The first wiring group includes a first stationary contact and a first movable contact that cooperate with each other, the first drive group cooperates with the first switching rod, and the first switching rod cooperates with the first movable contact. And / or, the wiring assembly includes a second wiring group, the contact switching rod includes a second switching rod, and the drive assembly includes a second drive group. The second wiring group includes a second stationary contact and a second movable contact that cooperate with each other, the second drive group cooperates with the second switching rod, and the second switching rod cooperates with the second movable contact.

[0010] Through the above scheme, the first wiring group is set to cooperate with the first switching rod, and the second wiring group is set to cooperate with the second switching rod, which can increase the flexibility of the auxiliary alarm module. When the first wiring group is connected to the external indicator, the second wiring group can be connected to different components according to actual use requirements, which also increases the use scenarios of the motor circuit breaker. By using the first drive group to drive the first switching rod and the second drive group to drive the second switching rod, the first wiring group and the second wiring group can be controlled by different mechanisms. In this way, the reliability of the auxiliary alarm module is increased. When the first drive group or the second drive group fails, the connection line of the external indicator can be flexibly adjusted.

[0011] In a possible design, when the wiring assembly includes a first wiring group, the first driving group includes a driving rod and a tripping rod, and a bracket is provided inside the shell. The driving rod is provided with a striking portion. The tripping rod is rotatably connected to the bracket, and the tripping rod includes a power arm and a first driving arm, the power arm is located on the moving path of the striking portion, and a portion of the first switching rod is located on the moving path of the first driving arm. The striking portion hits the power arm, so that when the driving rod drives the tripping rod to rotate, the tripping rod drives the first switching rod to rotate, so that the first movable contact abuts against the first stationary contact, so that the external indicator indicates the current abutment state.

[0012] Through the above scheme, a power arm and a first driving arm are arranged on the tripping rod, and a striking part is arranged on the driving rod. The striking part is driven to move by the rotation of the driving rod, and then the striking part is used to hit the power arm, so that the power arm drives the tripping rod to rotate and thus drives the first driving arm to move. The driving part can be effectively used to drive the first switching rod to rotate.

[0013] The driving rod is linked with the lock inside the motor circuit breaker. When the motor circuit breaker is disconnected unintentionally, the lock can respond immediately, so that the driving rod can drive the trip rod to rotate immediately. In this way, the auxiliary alarm module can respond quickly, and the external indicator can also indicate the current status immediately, thereby effectively increasing the reliability of the auxiliary alarm module.

[0014] In a possible design, the striking portion includes a first striking block and a second striking block. A notch is provided on a side of the first striking block close to the tripping rod, and the second striking block is closer to the power arm than the first striking block. The first striking block includes a first striking surface, and the second striking block includes a second striking surface. During a first period of rotation of the driving rod, the first striking surface can hit the power arm, and during a second period of rotation of the driving rod, the second striking surface can hit the power arm. In the process of the driving rod driving the tripping rod to rotate, the first period is earlier than the second period.

[0015] Through the above scheme, a notch is set on the side of the first striking block close to the tripping rod, and the second striking block is closer to the power arm than the first striking block. When the driving rod rotates, the first striking block hits the power arm first, and then the second striking block hits the power arm. This not only does not affect the efficiency of the driving rod in driving the tripping rod to rotate, but also, setting a notch at the first striking block can reduce the volume of the first striking block, thereby saving the use of internal space of the motor circuit breaker.

[0016] The first striking surface is in contact with the second striking surface and the power arm. When the first striking block and the second striking block hit the power arm to cause the power arm to move, the line-surface contact method is utilized to reduce the probability of abutment failure between the first striking block and the second striking block and the power arm, thereby improving the efficiency of the driving rod in driving the tripping rod to move.

[0017] In a possible design, when the wiring assembly includes a second wiring group, the second drive group includes a push rod and a push plate, and a bracket is provided inside the housing. The push rod is rotatably connected to the bracket. The push plate includes a main body, a trigger part and a second drive arm, the main body is rotatably connected to the housing, the trigger part and the second drive arm are both connected to the main body, the trigger part is located on the moving path of the push rod, and part of the second switching rod is located on the moving path of the second driving arm. When the push rod drives the push plate to rotate, the push plate drives the second switching rod to rotate, so that the second movable contact is separated or contacted with the second stationary contact, so that the external indicator indicates the current separation or contact state.

[0018] Through the above scheme, the push rod and the push plate are linked together. When the push rod rotates, the trigger part is squeezed to cause the main body to rotate. The main body drives the second drive arm to move. The second drive arm drives the second movable contact to separate from the second stationary contact. The second drive group can be effectively used to drive the second switching rod to rotate.

[0019] The driving rod is linked to the lock inside the motor circuit breaker. When the motor circuit breaker is disconnected unintentionally, the lock can react immediately. Under the action of the rotational force of the torsion spring, the push rod can react quickly to drive the push plate to move. In the process of being driven by the push rod to rotate, the push plate will also abut the moving contact of the motor circuit breaker, so that the moving contact of the motor circuit breaker is separated from the static contact. In this way, the on and off of the motor circuit breaker circuit can be linked to the on and off of the second wiring group.

[0020] In a possible design, when the wiring assembly includes a first wiring group, the first wiring group includes a first incoming terminal and a first outgoing terminal, and there are two first stationary contacts, and the two first stationary contacts are respectively connected to the first incoming terminal and the first outgoing terminal. The first movable contact is an elastic member, and the first movable contact includes a first end and a second end that are opposite to each other, and the first end is fixed to one of the first stationary contacts. The first switching rod includes a first fixed end and a first push end, and the first fixed end is rotatably connected to the housing, and the first push end can make the second end abut against another first stationary contact.

[0021] Through the above scheme, setting the first incoming line terminal and the second incoming line terminal can make the first wiring group connect different wires, so that a complete loop can be formed between the first wiring group and the external indicator. When the first movable contact is an elastic member, only one power source of the first drive group needs to be set to achieve the abutment or separation between the first movable contact and the first stationary contact, and there is no need to set an additional power source on the first switching rod, which saves the number of parts used, thereby saving the manufacturing cost of the auxiliary alarm module. The first switching rod is in the form of a combination of a first fixed end and a first push end. Either the first drive group or the first movable contact can drive the first push end to rotate, and the setting of the first fixed end prevents the first drive group or the first movable contact from causing the first switching rod to be misaligned with the housing, thereby increasing the reliability of the auxiliary alarm module.

[0022] In a possible design, when the wiring assembly includes a second wiring group, the second wiring group includes a second input terminal and a second output terminal, and there are two second stationary contacts, which are respectively connected to the second input terminal and the second output terminal. The second movable contact is an elastic member, and the second movable contact includes a first end and a second end that are opposite to each other, and the first end is fixed to one of the second stationary contacts. The second switching rod includes a second fixed end and a second push end, and the second fixed end is rotatably connected to the housing, and the second push end can separate or abut the second end from the other second stationary contact.

[0023] Through the above scheme, setting the second input terminal and the second output terminal can make the second wiring group connect different wires, so that a complete loop can be formed between the second wiring group and the external indicator. When the second movable contact is an elastic member, only one power source of the second drive group needs to be set to achieve the abutment or separation between the second movable contact and the second stationary contact, and there is no need to set an additional power source on the second switching rod, which saves the number of parts used, thereby saving the manufacturing cost of the auxiliary alarm module. The second switching rod is in the form of a combination of a first fixed end and a first push end. Either the second drive group or the second movable contact can drive the first push end to rotate, and the setting of the first fixed end prevents the second drive group or the second movable contact from causing the second switching rod to be misaligned with the housing, thereby increasing the reliability of the auxiliary alarm module.

[0024] In a possible design, the contact switching rod includes an operating arm, the operating arm cooperates with the driving assembly, and the driving assembly drives the contact switching rod to rotate through the operating arm.

[0025] According to the above scheme, an operating arm is provided on the contact switching rod, and the contact switching rod can be moved by the cooperation between the driving assembly and the operating arm, which can simplify the function of the contact switching rod so that the contact switching rod only needs to drive the movable contact to move.

[0026] In a possible design, the driving rod is further provided with a stop portion, which can limit the movement of the driving rod.

[0027] Through the above scheme, a stop portion is provided on the driving rod, and the stop portion can be used to cooperate with the components inside the motor circuit breaker to limit the rotation of the driving rod. In this way, the probability of the auxiliary alarm module being damaged due to excessive rotation of the driving rod due to the lack of limiting the driving rod can be reduced, thereby improving the reliability of the auxiliary alarm module.

[0028] In a possible design, the motor circuit breaker further includes a knob, which is rotatably connected to the housing and connected to the drive rod. When the knob is rotated, the drive rod can be driven to reset.

[0029] Through the above scheme, when the motor circuit breaker is disconnected due to unintentional circumstances, the knob can be used to reset the components inside the motor circuit breaker. At this time, during the resetting process, the knob can drive the driving rod to reset together through the connecting piece fixedly connected to the driving rod, ensuring that when the motor circuit breaker is disconnected again due to unintentional circumstances, the driving component can still drive the auxiliary alarm module to respond. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a front view of the motor circuit breaker provided in an embodiment of the present application.

[0031] Figure 2 A top view of a motor circuit breaker provided in an embodiment of the present application.

[0032] Figure 3 A schematic diagram of the structure of a shell provided in an embodiment of the present application.

[0033] Figure 4 A schematic diagram of the structure of the auxiliary alarm module provided in an embodiment of the present application.

[0034] Figure 5 A schematic diagram of the structure of the housing provided in an embodiment of the present application.

[0035] Figure 6 A partial structural diagram of the auxiliary alarm module provided in an embodiment of the present application.

[0036] Figure 7 A partial structural diagram of the auxiliary alarm module provided in an embodiment of the present application.

[0037] Figure 8 A schematic diagram of the structure of a trip rod provided in an embodiment of the present application.

[0038] Fig. 9 A schematic diagram of the structure of the push plate provided in an embodiment of the present application.

[0039] Fig.10 A schematic structural diagram of the internal structure of a motor circuit breaker provided in an embodiment of the present application at a certain viewing angle.

[0040] Fig.11 A schematic diagram of the structure of the driving rod provided in an embodiment of the present application.

[0041] Fig.12 A schematic structural diagram of the internal structure of the motor circuit breaker provided in an embodiment of the present application from another perspective.

[0042] Description of reference numerals:

[0043] 100, housing; 110, slot;

[0044] 200, driving assembly; 210, first driving group; 220, second driving group; 230, driving rod; 231, first striking block; 231a, first striking surface; 232, second striking block; 232a, second striking surface; 233, stopping part; 240, tripping rod; 241, power arm; 242, first driving arm; 250, pushing rod; 260, pushing plate; 261, main body; 262, triggering part; 263, second driving arm;

[0045] 300, auxiliary alarm module; 310, housing; 311, wiring slot; 320, wiring assembly; 321, first wiring group; 321a, first stationary contact; 321b, first movable contact; 322, second wiring group; 322a, second stationary contact; 322b, second movable contact; 330, contact switching rod; 331, first switching rod; 332, second switching rod; 333, operating arm;

[0046] 400, knob;

[0047] 500. Return spring. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0050] The terms "comprising" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover but not exclude other contents. The word "a" or "an" does not exclude the presence of a plurality.

[0051] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiments" in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0052] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0053] The directional words appearing in the following description are all directions shown in the drawings, and do not limit the static contact of a circuit breaker of the present application and the specific structure of the circuit breaker. For example, in the description of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present application.

[0054] In addition, the terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0055] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, the "connection" or "connection" of a mechanical structure may refer to a physical connection. For example, the physical connection may be a fixed connection, such as a fixed connection through a fixing member, such as a fixed connection through a screw, bolt or other fixing member; the physical connection may also be a detachable connection, such as a mutual snap connection or snap connection; the physical connection may also be an integral connection, such as welding, bonding or integral molding to form a connection for connection. The "connection" or "connection" of a circuit structure may refer to an electrical connection or a signal connection in addition to a physical connection. For example, it may be a direct connection, that is, a physical connection, or it may be an indirect connection through at least one intermediate element, as long as the circuit is connected, or it may be the internal connection of two elements; the signal connection may refer to a signal connection through a media medium, such as a radio wave, in addition to a signal connection through a circuit. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0056] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0057] Figure 1 This is a front view of the motor circuit breaker provided in an embodiment of the present application. Figure 2 A top view of a motor circuit breaker provided in an embodiment of the present application. Figure 3 A schematic diagram of the structure of a shell provided in an embodiment of the present application. Figure 4 A schematic diagram of the structure of the auxiliary alarm module provided in an embodiment of the present application. Figure 5 A schematic diagram of the structure of the housing provided in an embodiment of the present application. Figure 6 A partial structural diagram of the auxiliary alarm module provided in an embodiment of the present application. Figure 7 A partial structural diagram of the auxiliary alarm module provided in an embodiment of the present application.

[0058] like Figures 1 to 3 As shown, the present application provides a motor circuit breaker, which includes: a housing 100 and an auxiliary alarm module 300. The housing 100 is provided with a slot 110, and a drive assembly 200 is provided in the housing 100. The auxiliary alarm module 300 includes a housing 310, a wiring assembly 320 and a contact switching rod 330.

[0059] Combination Figure 4 as well as Figure 5As shown, the housing 310 has a receiving chamber inside, the wiring assembly 320 is disposed in the receiving chamber, and the contact switching rod 330 is partially disposed in the receiving chamber. The housing 310 is inserted into the slot 110, and a wiring groove 311 is disposed on the side wall of the housing 310, and the wiring groove 311 is exposed from the housing 100.

[0060] The wiring assembly 320 includes a wiring terminal, a stationary contact and a movable contact. The wiring terminal is opposite to the wiring slot 311. The wiring terminal is used to be electrically connected to an external indicator. The movable contact can abut against or separate from the stationary contact.

[0061] Combination Figure 6 as well as Figure 7 As shown, the part of the contact switching rod 330 located outside the accommodating cavity cooperates with the drive assembly 200, and the contact switching rod 330 abuts against the movable contact. The drive assembly 200 drives the contact switching rod 330 to rotate, and the contact switching rod 330 drives the movable contact to abut or separate from the stationary contact, so that the external indicator indicates the current state of the circuit breaker.

[0062] The housing 100 is provided with an installation space inside, and the drive assembly 200 is arranged in the installation space. The slot 110 may be a through slot provided on the housing 100, the through slot is connected to the installation space, and the installation space corresponding to the position of the slot 110 may be located on one side of the drive assembly 200, so that the drive assembly 200 can be more conveniently linked with the auxiliary alarm module 300.

[0063] The housing 310 may include a top cover and a base, which may be combined to form a receiving cavity, in which the wiring assembly 320 and a part of the contact switching rod 330 are disposed. In this way, the housing 310 may protect the wiring assembly 320 and a part of the contact switching rod 330.

[0064] The side wall of the housing 310 is provided with a wiring slot 311, which may be a through slot that penetrates the side wall of the housing 310. When the auxiliary alarm module 300 is inserted into the slot 110 provided in the housing 100, a portion of the auxiliary alarm module 300 is located in the installation space inside the housing 100, and a portion provided with the wiring slot 311 is located outside the housing 100 for subsequent wiring operations.

[0065] After the wiring assembly 320 is installed in the accommodating cavity, the wiring terminal is opposite to the wiring slot 311, and the wire connected to the external indicator can pass through the wiring slot 311 to be electrically connected to the wiring terminal. The stationary contact is fixedly connected to the wiring terminal. When the movable contact abuts against the stationary contact, the current inside the wiring assembly 320 is turned on, and when the movable contact is separated from the stationary contact, the current inside the wiring assembly 320 is turned off.

[0066] The part of the contact switching rod 330 located outside the accommodating cavity can cooperate with the driving assembly 200, so that the driving assembly 200 can be linked with the auxiliary alarm module 300. The contact switching rod 330 can be in a state of continuous contact with the movable contact, and the movable contact can be brought into contact with or separated from the stationary contact by driving the contact switching rod 330 by the driving assembly 200.

[0067] Through the above configuration, the present application sets a slot 110 on the housing 100, and part of the auxiliary alarm module 300 can be installed inside the housing 100 through the slot 110. In this way, it is no longer necessary to install the auxiliary alarm module 300 on the outer wall of the housing 100 of the motor circuit breaker by external connection, which saves the space required for the motor circuit breaker to be installed in the power distribution cabinet and reduces the difficulty of installing the motor circuit breaker in the power distribution cabinet. The wiring slot 311 is set on the housing 310, and the wiring slot 311 is exposed in the housing 100, which can ensure that after the auxiliary alarm module 300 is installed in the housing 100, it will not affect the normal use of the auxiliary alarm module 300.

[0068] A driving component 200 is arranged inside the shell 100, and the part of the contact switching rod 330 located outside the accommodating cavity is used to cooperate with the driving component 200, and the contact switching rod 330 is made to abut against the movable contact. The driving component 200 can drive the contact switching rod 330 to make the current inside the wiring component 320 turned on or off, so that the detection effect of the auxiliary alarm module 300 is more accurate. When the internal state of the motor circuit breaker changes, the auxiliary alarm module 300 can respond immediately, so that the operator can judge the disconnection state of the motor circuit breaker immediately.

[0069] Figure 8 A schematic diagram of the structure of a trip rod provided in an embodiment of the present application. Fig. 9 This is a schematic diagram of the structure of the push plate provided in the embodiment of the present application. Figure 6 as well as Figure 8 As shown, the wiring assembly 320 includes a first wiring group 321, the contact switching rod 330 includes a first switching rod 331, and the driving assembly 200 includes a first driving group 210. The first wiring group 321 includes a first stationary contact 321a and a first movable contact 321b that cooperate with each other, the first driving group 210 cooperates with the first switching rod 331, and the first switching rod 331 cooperates with the first movable contact 321b.

[0070] Combination Figure 7 as well as Fig. 9As shown, the wiring assembly 320 mentioned in the present application further includes a second wiring group 322, the contact switching rod 330 includes a second switching rod 332, and the drive assembly 200 includes a second drive group 220. The second wiring group 322 includes a second stationary contact 322a and a second movable contact 322b that cooperate with each other, the second drive group 220 cooperates with the second switching rod 332, and the second switching rod 332 cooperates with the second movable contact 322b.

[0071] The first switching lever 331 may be the same as the second switching lever 332 , or the first switching lever 331 may be different from the second switching lever 332 .

[0072] The first driving group 210 and the second driving group 220 may both be driving elements inside the motor circuit breaker, and the first driving group 210 and the second driving group 220 may share some parts to realize the driving function.

[0073] The first drive group 210 can drive the first switching rod 331 to move, so that the first movable contact 321b abuts against or separates from the first stationary contact 321a. The second drive group 220 can drive the second switching rod 332 to move, so that the second movable contact 322b abuts against or separates from the second stationary contact 322a.

[0074] Through the above settings, the first wiring group 321 is set to cooperate with the first switching rod 331, and the second wiring group 322 is set to cooperate with the second switching rod 332, which can increase the flexibility of the auxiliary alarm module 300. When the first wiring group 321 is connected to the external indicator, the second wiring group 322 can be connected to different components according to actual use requirements, which also increases the use scenarios of the motor circuit breaker. By using the first drive group 210 to drive the first switching rod 331, and using the second drive group 220 to drive the second switching rod 332, the first wiring group 321 and the second wiring group 322 can be controlled by different mechanisms. In this way, the reliability of the auxiliary alarm module 300 is increased. When the first drive group 210 or the second drive group 220 fails, the connection line of the external indicator can be flexibly adjusted.

[0075] The wiring assembly 320 may include only the first wiring group 321, or only the second wiring group 322, or the wiring assembly 320 may include both the first wiring group 321 and the second wiring group 322. For example, when the motor circuit breaker only needs to be connected to an external indicator, the first wiring group 321 or the second wiring group 322 may be provided separately, and when the motor circuit breaker also needs to be connected to other components, the first wiring group 321 and the second wiring group 322 may be provided simultaneously. This can increase the flexibility of use of the motor circuit breaker.

[0076] The specific structures and linkage modes of the first driving group 210, the first switching rod 331 and the first wiring group 321, as well as the second driving group 220, the second switching rod 332 and the second wiring group 322 are described in detail below with reference to the accompanying drawings.

[0077] Fig.10 A schematic structural diagram of the internal structure of a motor circuit breaker provided in an embodiment of the present application at a certain viewing angle. Fig.11 This is a schematic diagram of the structure of the driving rod provided in the embodiment of the present application. Figure 8 , Fig.10 as well as Fig.11 As shown, the first driving group 210 includes a driving rod 230 and a tripping rod 240, and a bracket is provided inside the housing 100. The driving rod 230 is provided with a striking portion. The tripping rod 240 is rotatably connected to the bracket, and the tripping rod 240 includes a power arm 241 and a first driving arm 242. The power arm 241 is located on the moving path of the striking portion, and part of the first switching rod 331 is located on the moving path of the first driving arm 242. The striking portion hits the power arm 241, so that when the driving rod 230 drives the tripping rod 240 to rotate, the tripping rod 240 drives the first switching rod 331 to rotate, so that the first movable contact 321b abuts against the first stationary contact 321a, so that the external indicator indicates the current abutment state.

[0078] The tripping rod 240 may be rod-shaped, and the power arm 241 and the first driving arm 242 may be fixedly connected to the tripping rod 240. The power arm 241 and the first driving arm 242 may be connected to both ends of the tripping rod 240, and the power arm 241 may be arranged toward the driving rod 230, and the first driving arm 242 may be arranged toward the first wiring group 321.

[0079] The power arm 241 is arranged on the moving path of the striking part. When the striking part moves, the striking part can hit the power arm 241, so that the power arm 241 drives the tripping rod 240 to rotate. The first switching rod 331 is arranged on the moving path of the first driving arm 242. When the power arm 241 drives the tripping rod 240 to rotate, the tripping rod 240 drives the first driving arm 242 to move, and the first driving arm 242 can drive the first switching rod 331 to move. At this time, since the first switching rod 331 is in contact with the first movable contact 321b, the first switching rod 331 will drive the first movable contact 321b to make the first movable contact 321b in contact with the first stationary contact 321a, the internal circuit of the first wiring group 321 is connected, and the external indicator indicates the current state.

[0080] Through the above arrangement, a power arm 241 and a first driving arm 242 are arranged on the tripping rod 240, and a striking part is arranged on the driving rod 230. The striking part is driven to move by the rotation of the driving rod 230, and then the striking part is used to hit the power arm 241, so that the power arm 241 drives the tripping rod 240 to rotate and thus drives the first driving arm 242 to move. The first driving group 210 can be effectively used to drive the first switching rod 331 to rotate.

[0081] The driving rod 230 is linked with the lock inside the motor circuit breaker. When the motor circuit breaker is disconnected unintentionally, the lock can respond immediately, so that the driving rod 230 can drive the trip rod 240 to rotate immediately. In this way, the auxiliary alarm module 300 can respond quickly, and the external indicator can also indicate the current status immediately, thereby effectively increasing the reliability of the auxiliary alarm module 300.

[0082] Please continue to refer to Figure 8 , Fig.10 as well as Fig.11 As shown, the striking portion includes a first striking block 231 and a second striking block 232; a notch is provided on a side of the first striking block 231 close to the tripping rod 240, and the second striking block 232 is closer to the power arm 241 than the first striking block 231. The first striking block 231 includes a first striking surface 231a, and the second striking block 232 includes a second striking surface 232a. In the first period of rotation of the driving rod 230, the first striking surface 231a can hit the power arm 241, and in the second period of rotation of the driving rod 230, the second striking surface 232a can hit the power arm 241. In the process of the driving rod 230 driving the tripping rod 240 to rotate, the first period is earlier than the second period.

[0083] The first striking block 231 and the second striking block 232 are both protruding structures provided on the driving rod 230. The first striking block 231 and the second striking block 232 can rotate along with the rotation of the driving rod 230.

[0084] The first striking surface 231a and the second striking surface 232a have different orientations. Compared with using one striking surface, the space occupied by the driving rod 230 in the process of striking the power arm 241 can be saved, which is suitable for miniaturization requirements. Preferably, the first striking surface 231a can be the side wall of the first striking block 231 in the direction in which the driving rod 230 drives the tripping rod 240 to rotate. When the first striking block 231 hits the power arm 241, the first striking surface 231a abuts against the power arm 241. The second striking surface 232a can be the side wall of the second striking block 232 in the direction in which the driving rod 230 drives the tripping rod 240 to rotate. When the second striking block 232 hits the power arm 241, the second striking surface 232a abuts against the power arm 241.

[0085] The first period is the period when the first striking block 231 contacts the power arm 241 when the driving rod 230 drives the tripping rod 240 to rotate. The second period is the period when the second striking block 232 contacts the power arm 241 when the driving rod 230 drives the tripping rod 240 to rotate.

[0086] Because the power arm 241 is connected to the tripping rod 240 , when the tripping rod 240 rotates, the power arm 241 rotates together with the tripping rod 240 , which causes the power arm 241 to move in a direction away from the driving rod 230 .

[0087] Therefore, in the first time period, the first striking block 231 hits the power arm 241, and the first striking surface 231a is in contact with the power arm 241. In the second time period, the first striking surface 231a is no longer in contact with the power arm 241, and the first striking block 231 hits the power arm 241, and the second striking block 232 closer to the power arm 241 hits the power arm 241. At this time, the second striking surface 232a is in contact with the power arm 241.

[0088] Through the above arrangement, a notch is provided on the side of the first striking block 231 close to the tripping rod 240, and the second striking block 232 is closer to the power arm 241 than the first striking block 231. When the driving rod 230 rotates, the first striking block 231 first hits the power arm 241, and then the second striking block 232 hits the power arm 241. This will not only not affect the efficiency of the driving rod 230 in driving the tripping rod 240 to rotate, but also, setting a notch at the first striking block 231 can reduce the volume of the first striking block 231, thereby saving the use of the internal space of the motor circuit breaker.

[0089] The first striking surface 231a is in contact with the second striking surface 232a and the power arm 241. When the first striking block 231 and the second striking block 232 hit the power arm 241 and the power arm 241 moves, the line-surface contact method is utilized to reduce the probability of abutment failure between the first striking block 231 and the second striking block 232 and the power arm 241, thereby improving the efficiency of the driving rod 230 in driving the tripping rod 240 to move.

[0090] Fig.12 The schematic diagram of the internal structure of the motor circuit breaker provided in the embodiment of the present application from another perspective. Figure 8 , Fig. 9 as well as Fig.12As shown, the second driving group 220 includes a push rod 250 and a push plate 260, and a bracket is provided inside the housing 100. The push rod 250 is rotatably connected to the bracket. The push plate 260 includes a body 261, a triggering part 262 and a second driving arm 263. The body 261 is rotatably connected to the housing 100, the triggering part 262 and the second driving arm 263 are both fixedly connected to the body 261, and the triggering part 262 and the second driving arm 263 are fixedly connected to the two opposite sides of the body 261. The triggering part 262 is located on the moving path of the push rod 250, and part of the second switching rod 332 is located on the moving path of the second driving arm 263. When the push rod 250 drives the push plate 260 to rotate, the push plate 260 drives the second switching rod 332 to rotate, so that the second movable contact 322b is separated or contacted with the second stationary contact 322a, so that the external indicator indicates the current separation or contact state.

[0091] The push rod 250 can be connected to the bracket through a torsion spring, and the push rod 250 can be connected to the driving rod 230, and the driving rod 230 is linked to the lock in the motor circuit breaker. When the motor circuit breaker is in a normal connection state, the lock limits the driving rod 230, and the driving rod 230 is connected to the push rod 250. Through the action of the torsion spring, the entire drive system is in a balanced state. When the motor circuit breaker is disconnected unintentionally, the lock reacts. At this time, the lock cannot limit the driving rod 230, and the balanced state of the drive system is broken. Under the action of the rotational force of the torsion spring, the torsion spring drives the push rod 250 to rotate.

[0092] The body 261 may be plate-shaped, and the body 261 may be connected to the housing 100 via a rotating shaft. The second driving arm 263 may be disposed on the side of the body 261 away from the triggering portion 262. The triggering portion 262 may be located on the moving path of the push rod 250. When the push rod 250 rotates, the push rod 250 may squeeze the triggering portion 262, causing the body 261 to rotate around the rotating shaft as the rotation center. At the same time, the second driving arm 263 disposed on the side away from the triggering portion 262 may move with the body 261, thereby driving the second switching rod 332 to rotate. During the rotation process, the second switching rod 332 drives the second movable contact 322b, causing the second movable contact 322b to separate from the second stationary contact 322a, disconnecting the internal circuit of the second wiring group 322, and the external indicator indicates the current state.

[0093] The push plate 260 may be disposed on one side of the second switching rod 332, and when the push plate 260 pulls the second switching rod 332, the second movable contact 322b is separated from the second stationary contact 322a. Alternatively, the push plate 260 may be disposed on the other side of the second switching rod 332, and when the push plate 260 pushes the second switching rod 332, the second movable contact 322b is in contact with the second stationary contact 322a.

[0094] Through the above arrangement, the push rod 250 and the push plate 260 are linked together. When the push rod 250 rotates, the trigger part 262 is squeezed to rotate the main body 261. The main body 261 drives the second driving arm 263 to move. The second driving arm 263 drives the second movable contact 322b to separate from the second stationary contact 322a. The second driving group 220 can be effectively used to drive the second switching rod 332 to rotate.

[0095] The driving rod 230 is linked with the lock in the motor circuit breaker. When the motor circuit breaker is disconnected unintentionally, the lock can react immediately. Under the action of the rotational force of the torsion spring, the push rod 250 can react quickly to drive the push plate 260 to move. In the process of being driven by the push rod 250 to rotate, the push plate 260 will also abut the moving contact of the motor circuit breaker, so that the moving contact of the motor circuit breaker is separated from the static contact. In this way, the on and off of the motor circuit breaker circuit can be associated with the on and off of the second wiring group 322.

[0096] The first wiring group 321 and the second wiring group 322 are described in detail below with reference to the accompanying drawings.

[0097] like Figure 6 As shown, the first wiring group 321 includes a first incoming terminal and a first outgoing terminal, and there are two first stationary contacts 321a, which are respectively connected to the first incoming terminal and the first outgoing terminal. The first movable contact 321b is an elastic member, and the first movable contact 321b includes a first end and a second end that are opposite to each other, and the first end is fixed to one of the first stationary contacts 321a. The first switching rod 331 includes a first fixed end and a first push end, and the first fixed end is rotatably connected to the housing 310, and the first push end can make the second end abut against another first stationary contact 321a.

[0098] The first inlet terminal and the first outlet terminal can be electrically connected to different wires respectively. One of the first stationary contacts 321a is connected to the first inlet terminal, and the other first stationary contact 321a is connected to the first outlet terminal.

[0099] The first movable contact 321b may be plate-shaped, and the first end is fixed to one of the first stationary contacts 321a. When the first movable contact 321b abuts against the first switching rod 331, the first drive group 210 pulls the first switching rod 331 to separate the second end from the other first stationary contact 321a. When the first drive group 210 moves, the pulling force of the first drive group 210 on the first switching rod 331 disappears, and the first movable contact 321b recovers its deformation under the action of the elastic force, and at this time, the second end abuts against the other first stationary contact 321a.

[0100] The first fixed end is rotatably connected to the housing 310 , and the first pushing end can rotate around the first fixed end as a rotation center under the drive of the first driving group 210 .

[0101] In summary, the first inlet terminal and the first outlet terminal are provided so that the first wiring group 321 can be connected to different wires, so that a complete circuit can be formed between the first wiring group 321 and the external indicator. When the first movable contact 321b is an elastic member, only one power source of the first drive group 210 is required to achieve the abutment or separation between the first movable contact 321b and the first stationary contact 321a, and there is no need to set an additional power source on the first switching rod 331, which saves the number of parts used, thereby saving the manufacturing cost of the auxiliary alarm module 300. The first switching rod 331 is in the form of a combination of a first fixed end and a first push end. Whether it is the first drive group 210 or the first movable contact 321b, it can drive the first push end to rotate, and the setting of the first fixed end makes the first drive group 210 or the first movable contact 321b not cause the first switching rod 331 to be misaligned with the housing 310, thereby increasing the reliability of the auxiliary alarm module 300.

[0102] like Figure 7 As shown, the second wiring group 322 includes a second inlet terminal and a second outlet terminal, and there are two second stationary contacts 322a, which are respectively connected to the second inlet terminal and the second outlet terminal. The second movable contact 322b is an elastic member, and the second movable contact 322b includes a first end and a second end that are opposite to each other, and the first end is fixed to one of the second stationary contacts 322a. The second switching rod 332 includes a second fixed end and a second push end, and the second fixed end is rotatably connected to the housing 310, and the second push end can separate or abut the second end from the other second stationary contact 322a.

[0103] The second push end may be disposed on one side of the second end, and when the second push end pulls the second end, the second end may be separated from another second stationary contact 322a. Alternatively, the second push end may be disposed on the other side of the second end, and when the second push end pushes the second end, the second end may abut against another second stationary contact 322a.

[0104] The second wiring group 322 is configured in the same manner as the first wiring group 321, and the second movable contact 322b can be configured in the same manner as the first movable contact 321b. The specific configuration and function have been explained in detail above and will not be repeated here. The second switching rod 332 can be the same as the first switching rod 331, or the second switching rod 332 can be different from the first switching rod 331. When the second switching rod 332 is different from the first switching rod 331, the second switching rod 332 is also in the form of a combination of a second fixed end and a second push end. With this configuration, the second driving group 220 or the second movable contact 322b will not cause the second switching rod 332 to be misaligned with the housing 310, while ensuring that the second driving group 220 and the second movable contact 322b can drive the second push end to rotate, thereby increasing the reliability of the auxiliary alarm module 300.

[0105] In summary, the second inlet terminal and the second outlet terminal are provided so that the second wiring group 322 can be connected to different wires, so that a complete circuit can be formed between the second wiring group 322 and the external indicator. When the second movable contact 322b is an elastic member, only one power source of the second drive group 220 is required to achieve the abutment or separation between the second movable contact 322b and the second stationary contact 322a, and there is no need to set an additional power source on the second switching rod 332, which saves the number of parts used, thereby saving the manufacturing cost of the auxiliary alarm module 300. The second switching rod 332 is in the form of a combination of a first fixed end and a first push end. Whether it is the second drive group 220 or the second movable contact 322b, it can drive the first push end to rotate, and the setting of the first fixed end prevents the second drive group 220 or the second movable contact 322b from causing the second switching rod 332 to be misaligned with the housing 310, thereby increasing the reliability of the auxiliary alarm module 300.

[0106] like Figures 6 to 9 As shown, the contact switching rod 330 includes an operating arm 333 , and the operating arm 333 cooperates with the driving assembly 200 . The driving assembly 200 drives the contact switching rod 330 to rotate through the operating arm 333 .

[0107] The operating arm 333 may be a columnar structure extending from the contact switching rod 330 toward the outside of the accommodating chamber, and the operating arm 333 has a certain thickness so that the driving assembly 200 can abut against the operating arm 333, thereby driving the contact switching rod 330 to rotate. The operating arm 333 is located outside the accommodating chamber, which can increase the sealing performance of the housing 310, and does not need to open a large through slot on the housing 310 for the driving assembly 200 to enter, so that the protective effect of the housing 310 on the internal components of the auxiliary alarm module 300 can be improved, and the service life and reliability of the auxiliary alarm module 300 are increased.

[0108] The operating arm 333 may be integrally formed with the contact switching rod 330 , or the operating arm 333 and the contact switching rod 330 may be separately formed and then assembled.

[0109] Through the above configuration, an operating arm 333 is provided on the contact switching rod 330, and the contact switching rod 330 can be moved by the cooperation between the driving assembly 200 and the operating arm 333, so that the function of the contact switching rod 330 can be simplified, so that the contact switching rod 330 only needs to drive the movable contact to move.

[0110] like Figure 8 as well as Fig.11 As shown, the driving rod 230 is further provided with a stop portion 233 , and the stop portion 233 can limit the movement of the driving rod 230 .

[0111] The stop portion 233 may be a side wall of the driving rod 230. The stop portion 233 may cooperate with components inside the motor circuit breaker, and the driving rod 230 may be limited by the components inside the motor circuit breaker, so that the driving rod 230 stops rotating.

[0112] Through the above-mentioned arrangement, a stop portion 233 is provided on the driving rod 230, and the stop portion 233 can be utilized to cooperate with the components inside the motor circuit breaker to limit the rotation of the driving rod 230. In this way, the probability of the auxiliary alarm module 300 being damaged due to excessive rotation of the driving rod 230 due to the lack of limiting the driving rod 230 can be reduced, thereby improving the reliability of the auxiliary alarm module 300.

[0113] like Figure 3 , Fig.10 as well as Fig.12 As shown, the motor circuit breaker further includes a knob 400, which is rotatably connected to the housing 100, and the knob 400 is connected to the driving rod 230. When the knob 400 is rotated, the driving rod 230 can be driven to reset.

[0114] The knob 400 is partially disposed outside the housing 100 , and the knob 400 is fixedly connected to the driving rod 230 via a connecting piece.

[0115] Through the above arrangement, when the motor circuit breaker is disconnected due to non-human factors, the knob 400 can be used to reset the components inside the motor circuit breaker. At this time, during the resetting process, the knob 400 can drive the drive rod 230 to reset together through the connecting piece fixedly connected to the drive rod 230, ensuring that when the motor circuit breaker is disconnected again due to non-human factors, the drive assembly 200 can still drive the auxiliary alarm module 300 to respond.

[0116] like Fig.12As shown, the motor circuit breaker further includes a reset spring 500, one end of which abuts against the push plate 260, and the other end of which abuts against the housing 100. After the push rod 250 drives the push plate 260 to rotate, the reset spring 500 can reset the push plate 260.

[0117] When the internal circuit of the motor circuit breaker is in a flowing state, the reset spring 500 is in a normal state. When the internal circuit of the motor circuit breaker is disconnected, the push rod 250 drives the push plate 260 to rotate, and the reset spring 500 changes from a normal state to a stretched state. When the reset spring 500 changes from a stretched state to a normal state, the reset spring 500 can drive the push plate 260 to reset.

[0118] Through the above arrangement, when the motor circuit breaker is disconnected due to non-human factors, the push rod 250 will drive the push plate 260 to rotate, and the compression spring connected to the push plate 260 will change from a normal state to a stretched state. The reset spring 500 in the stretched state can drive the push plate 260 to reset during the process of restoring the deformation, thereby ensuring that when the motor circuit breaker is disconnected again due to non-human factors, the drive assembly 200 can still drive the auxiliary alarm module 300 to respond.

[0119] like Figure 8 , Fig.11 as well as Fig.12 As shown, the tripping rod 240 includes a first end and a second end that are opposite to each other, and a torsion spring is sleeved on the first end and / or the second end. When the driving rod 230 drives the tripping rod 240 to rotate, the torsion spring stores energy. When the driving rod 230 stops rotating, the side wall of the second striking block 232 abuts against the power arm 241. At this time, the torsion spring is in a state of storing energy. When the driving rod 230 is reset, the side wall of the second striking block 232 no longer abuts against the power arm 241. At this time, the torsion spring releases energy, so that the tripping rod 240 is reset.

Claims

1. A motor circuit breaker, characterized in that: include: A housing, wherein the housing is provided with a slot, and a driving assembly is provided inside the housing; The auxiliary alarm module comprises a housing, a wiring assembly and a contact switching rod, wherein a receiving chamber is provided inside the housing, the wiring assembly is provided in the receiving chamber, and the contact switching rod is partially provided in the receiving chamber; the housing is plugged into the slot, a wiring groove is provided on the side wall of the housing, and the wiring groove is exposed from the housing; The wiring assembly includes a first wiring group, a wiring terminal, a stationary contact and a movable contact, wherein the wiring terminal is opposite to the wiring slot, the wiring terminal is used to be electrically connected to an external indicator, and the movable contact can abut against or separate from the stationary contact; The part of the contact switching rod located outside the accommodating cavity cooperates with the driving assembly, and the contact switching rod abuts against the movable contact; The driving assembly includes a first driving group, the first driving group includes a driving rod and a tripping rod, a bracket is provided inside the housing, the driving rod is provided with a striking portion, the tripping rod is rotatably connected to the bracket, and the tripping rod includes a power arm and a first driving arm; The striking part includes a first striking block and a second striking block, wherein a notch is provided on a side of the first striking block close to the tripping rod, and the second striking block is closer to the power arm than the first striking block, and the first striking block includes a first striking surface, and the second striking block includes a second striking surface; during a first period of rotation of the driving rod, the first striking surface can strike the power arm, and during a second period of rotation of the driving rod, the second striking surface can strike the power arm; The driving assembly drives the contact switching rod to rotate, and the contact switching rod drives the movable contact to abut or separate from the stationary contact, so that the external indicator indicates the current state of the circuit breaker; wherein, in the process of the driving rod driving the tripping rod to rotate, the first time period is earlier than the second time period.

2. The motor circuit breaker according to claim 1, characterized in that The contact switching rod comprises a first switching rod; The first wiring group includes a first stationary contact and a first movable contact that cooperate with each other, the first driving group cooperates with the first switching rod, and the first switching rod cooperates with the first movable contact; And / or, the wiring assembly includes a second wiring group, the contact switching rod includes a second switching rod, and the drive assembly includes a second drive group; The second wiring group includes a second stationary contact and a second movable contact that cooperate with each other, the second driving group cooperates with the second switching rod, and the second switching rod cooperates with the second movable contact.

3. The motor circuit breaker according to claim 2, characterized in that When the wiring assembly includes a first wiring group, the power arm is located on the moving path of the striking part, and part of the first switching rod is located on the moving path of the first driving arm; The striking part strikes the power arm, so that when the driving rod drives the tripping rod to rotate, the tripping rod drives the first switching rod to rotate, so that the first movable contact abuts against the first stationary contact, so that the external indicator indicates the current abutment state.

4. The motor circuit breaker according to claim 2, characterized in that: When the wiring assembly includes a second wiring group, the second driving group includes a push rod and a push plate, and a bracket is provided inside the housing; The push rod is rotatably connected to the bracket; The push plate includes a main body, a trigger part and a second driving arm, the main body is rotatably connected to the housing, the trigger part and the second driving arm are both connected to the main body, the trigger part is located on the moving path of the push rod, and part of the second switching rod is located on the moving path of the second driving arm; When the push rod drives the push plate to rotate, the push plate drives the second switching rod to rotate, so that the second movable contact is separated from or in contact with the second stationary contact, so that the external indicator indicates the current separation or contact state.

5. The motor circuit breaker according to claim 2, characterized in that: When the wiring assembly includes a first wiring group, the first wiring group includes a first incoming terminal and a first outgoing terminal, there are two first stationary contacts, and the two first stationary contacts are respectively connected to the first incoming terminal and the first outgoing terminal; The first movable contact is an elastic member, and the first movable contact comprises a first end and a second end which are opposite to each other, and the first end is fixed to one of the first stationary contacts; The first switching rod includes a first fixed end and a first pushing end, the first fixed end is rotatably connected in the housing, and the first pushing end can make the second end abut against another of the first stationary contacts.

6. The motor circuit breaker according to claim 2, characterized in that When the wiring assembly includes a second wiring group, the second wiring group includes a second incoming terminal and a second outgoing terminal, and there are two second stationary contacts, which are respectively connected to the second incoming terminal and the second outgoing terminal; The second movable contact is an elastic member, and the second movable contact comprises a first end and a second end which are opposite to each other, and the first end is fixed to one of the second stationary contacts; The second switching rod includes a second fixed end and a second pushing end, the second fixed end is rotatably connected in the housing, and the second pushing end can make the second end separate from or abut against another second stationary contact.

7. The motor circuit breaker according to claim 1, characterized in that The contact switching rod comprises an operating arm, the operating arm cooperates with the driving assembly, and the driving assembly drives the contact switching rod to rotate through the operating arm.

8. The motor circuit breaker according to claim 1, characterized in that The driving rod is further provided with a stop portion, and the stop portion can limit the movement of the driving rod.

9. The motor circuit breaker according to claim 1, characterized in that comprising a knob, the knob being rotatably connected to the housing, and the knob being connected to the driving rod; When the knob is rotated, the driving rod can be driven to reset.

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