Tripping assembly and circuit breaker

Abstract

The embodiment of the utility model provides a tripping assembly and a circuit breaker, and relates to the field of electrical equipment. The tripping assembly comprises an armature, an electromagnet, a support and an elastic piece. A driving part, a driven part and a first connecting part are arranged on the armature, and a second connecting part is arranged on the support. And the first connecting part and the second connecting part are rotatably connected with each other, so that the armature can rotate in a fixed-axis manner. The electromagnet is connected to the support, the driving part is opposite to the electromagnet, and the elastic piece is connected between the armature and the support. The driving part can get close to or get away from the electromagnet under the magnetic action of the electromagnet and the elastic action of the elastic piece and drive the driven part to rotate. And the driven part is used for separating a moving contact and a static contact in a current loop of the circuit breaker through rotation when the driving part is close to the electromagnet. The tripping assembly and the circuit breaker are higher in reliability.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of electrical technology, and particularly to a tripping component and a circuit breaker. Background Art

[0002] A circuit breaker is an indispensable safety protection device in the power system, mainly used to protect the circuit from overload and short circuit. When a traditional circuit breaker detects an abnormal current, it needs to quickly disconnect the circuit to prevent further damage. For this purpose, the circuit breaker is usually equipped with a tripping component. When the current exceeds a predetermined threshold, the tripping component will cut off the current circuit.

[0003] In the current tripping components, a movable member is usually provided. When the movable member moves within the movable range, it will act on the moving contact in the current circuit to separate the moving contact from the static contact, thereby cutting off the current circuit.

[0004] However, in the existing tripping components, the movable member is prone to offset within the movable range, which will cause the movement amplitude of the movable member to be insufficient, resulting in the movable member not moving in place, so that the circuit cannot be cut off in time or the cutting fails, and the reliability is relatively low. Therefore, how to improve the reliability of the tripping component has become a technical problem to be solved. Summary of the Utility Model

[0005] In view of the above problems, the embodiments of the present application provide a tripping component. In this tripping component, the active part can drive the driven part to rotate around a fixed axis under the magnetic force of the electromagnet and the elastic force of the elastic member. The armature will not generate offset, the movement process of the armature is controllable, and the driven part can always move in place, so as to act on the moving contact to cut off the current circuit, and the reliability is higher.

[0006] One aspect of the embodiments of the present application provides a tripping component applied to a circuit breaker. The tripping component includes an armature, an electromagnet, a bracket and an elastic member. The armature is provided with an active part, a driven part and a first connecting part, and the bracket is provided with a second connecting part. The first connecting part and the second connecting part are rotatably connected to each other, so that the armature can rotate around a fixed axis. The active part and the electromagnet are opposite to each other, and the elastic member is connected between the armature and the bracket. The active part can approach or move away from the electromagnet under the magnetic force of the electromagnet and the elastic force of the elastic member, and drive the driven part to rotate. The driven part is used to drive the moving contact and the static contact in the current circuit of the circuit breaker to separate by rotating when the active part approaches the electromagnet.

[0007] In this tripping component, the armature will not generate offset, the movement process of the armature is controllable, and the driven part can always move in place, so as to act on the moving contact to cut off the current circuit, and the reliability is higher.

[0008] In an alternative embodiment, the first connecting portion is a rotating arm, and the second connecting portion is a rotating groove formed by two groove walls forming an angle with each other. The rotating arm is inserted into the rotating groove and can rotate within the rotating groove.

[0009] In this embodiment, the rotating groove provides stable support and guidance for the rotating arm, ensuring that the rotating arm does not wobble or shift during rotation. Moreover, the docking between the rotating arm and the rotating groove is convenient. When the armature needs to be replaced, it can be easily removed from the rotating groove, making the installation and replacement of the armature more convenient.

[0010] In an alternative embodiment, an arc-shaped chamfer is provided at the angle of the rotating groove, and the rotating arm contacts the chamfer surface.

[0011] In this embodiment, the outer contour of the rotating wall closely fits the arc-shaped inner wall, making the rotation of the armature smoother and less likely to fall off. Moreover, the surface contact increases the contact area between the rotating arm and the rotating groove, reducing the wear between the rotating arm and the rotating groove.

[0012] In an alternative embodiment, the first connecting portion is located between the driving portion and the driven portion, such that when the armature rotates, the driving portion and the driven portion swing in different regions.

[0013] In this embodiment, the driven portion can move in place in a timely and effective manner following the movement of the driving portion, with high transmission efficiency, fast reaction rate, and reasonable overall space distribution, making the structure more compact and less likely to cause interference between components.

[0014] In an alternative embodiment, the driving portion and the driven portion form an angle with each other, and the first connecting portion is located at the intersection angle between the driving portion and the driven portion.

[0015] This embodiment can further optimize the spatial structure of the armature, reduce the movement space of the armature, and make the overall structure more compact.

[0016] In an alternative embodiment, a blocking portion is provided on the electromagnetic component, and the blocking portion is located on the path of the driving portion away from the electromagnet, such that the driving portion moves between the blocking portion and the electromagnet.

[0017] By restricting the rotation of the armature through the blocking portion, the movable range of the armature is made more reasonable and occupies less space.

[0018] In an alternative embodiment, the elastic member is a spring. A first spring connecting portion is provided on the armature, and a second spring connecting portion is provided on the bracket. One end of the spring is connected to the first spring connecting portion, and the other end of the spring is connected to the second spring connecting portion, and the spring is in a stretched state. The pulling force of the spring is used to keep the driving portion in a position away from the electromagnet, and when the suction force of the electromagnet is greater than the pulling force of the spring, the armature is attracted to the electromagnet.

[0019] In this method, the armature is connected to the bracket by a spring, with a simple structure and convenient maintenance. Moreover, the spring is in a stretched state, such that the elastic force exerted on the armature is the tensile force of the spring, and the magnitude of the tensile force is easy to predict, with higher controllability.

[0020] In an alternative method, the electromagnet is located on the first side of the bracket, the second spring connection part is located on the second side of the bracket, the first spring connection part is located on the driven part, and the second side and the first side are opposite sides of the bracket.

[0021] In this method, when the spring is connected between the first spring connection part and the second spring connection part, the spring and the electromagnet are located on both sides of the bracket, such that there is no interference between the spring and the electromagnet, and at the same time, the overall structure is more compact.

[0022] In an alternative method, the first spring connection part is a cantilever protruding from the driven part, and the second connection part is a hook protruding from the bracket. One end of the spring is hung on the cantilever, and the other end of the spring hooks the hook.

[0023] In this method, the cantilever and the hook are convenient to process and are also convenient to connect to the spring.

[0024] On the other hand, an embodiment of the present application provides a circuit breaker, which includes a moving contact, a static contact, and any one of the above-mentioned tripping components. The moving contact and the static contact are opposite to each other, and the moving contact is within the actuation range of the driven part of the tripping component, so as to be separated from the static contact under the action of the driven part.

[0025] In this type of circuit breaker, the active part in the tripping component can drive the driven part to rotate around a fixed axis under the action of the magnetic force of the electromagnet and the elastic force of the elastic member. The armature in the tripping component will not shift, and the driven part can always move in place, thereby acting on the moving contact to cut off the current circuit, and the reliability of the circuit breaker is higher.

[0026] In the tripping component and the circuit breaker provided by the embodiments of the present application, the active part of the armature approaches or moves away from the electromagnet under the action of the magnetic force of the electromagnet and the elastic force of the elastic member, thereby driving the driven part to move, causing the driven part to act on the moving contact of the current circuit to cut off the circuit, and its movement process is controllable. Moreover, the first connection part of the armature and the second connection part of the bracket are connected to each other, such that the armature can only rotate around a fixed axis, restricting the movable range of the armature, preventing the armature from shifting, enabling the driven part to move in place along a predetermined trajectory, and not causing the circuit cut-off to fail, thereby improving the reliability of the tripping component.

[0027] The above description is only an overview of the technical solutions of the embodiments of the present application. In order to be able to understand the technical means of the embodiments of the present application more clearly, it can be implemented in accordance with the content of the description. Moreover, in order to make the above and other purposes, features, and advantages of the embodiments of the present application more obvious and understandable, the following specifically illustrates the specific implementation manners of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 FIG. is a schematic structural diagram of a tripping component provided by an embodiment of the present application.

[0030] Figure 2 FIG. is a schematic structural diagram of a bracket related to an embodiment of the present application.

[0031] Figure 3 FIG. is a schematic structural diagram of an armature related to an embodiment of the present application.

[0032] Figure 4 FIG. is a schematic structural diagram of a tripping component when the active part is away from the electromagnet in an embodiment of the present application.

[0033] Figure 5 FIG. is a schematic structural diagram of a tripping component when the active part is in contact with the electromagnet in an embodiment of the present application.

[0034] Figure 6 is Figure 4 a partial enlarged schematic view of point A of.

[0035] Figure 7 is Figure 5 a partial enlarged schematic view of point B of.

[0036] Reference numerals:

[0037] 10. Armature; 11. First connecting part; 12. Active part; 13. Driven part; 14. First spring connecting part;

[0038] 20. Electromagnet;

[0039] 30. Bracket; 31. Second connecting part; 32. Second spring connecting part; 33. Blocking part;

[0040] 40. Elastic member. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Apparently, the described embodiments are some, but not all, of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of this application without creative efforts shall fall within the scope of protection of this application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used in the description of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0043] The terms "including" and "having" and any variations thereof in the description, 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 multiple.

[0044] Referring to "embodiments" herein means that specific features, structures, or characteristics described in connection with the embodiments may be included in at least one embodiment of this application. The phrase "embodiments" appearing in various positions in the description is not necessarily referring to the same embodiment, nor are they independent or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0045] The term "and / or" herein is merely a description of the associated relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B may represent: the sole existence of A, the simultaneous existence of A and B, and the sole existence of B. Additionally, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0046] The orientation terms appearing in the following description are all the directions shown in the figures and do not limit the specific structures of the tripping components and circuit breakers of this application. For example, in the description of this application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to this application.

[0047] In addition, expressions indicating directions such as the X direction, Y direction, and Z direction for explaining the operations and structures of the components of the trip assembly and the circuit breaker in this embodiment are not absolute but relative. Although these indications are appropriate when the components of the trip assembly and the circuit breaker are in the positions shown in the figures, when these positions change, these directions should be interpreted differently to correspond to the changes.

[0048] In addition, terms such as "first" and "second" in the description and claims of this application or in 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 such features.

[0049] In the description of this application, unless otherwise specified, the meaning of "a plurality" refers to two or more (including two). Similarly, "a plurality of groups" refers to two or more groups (including two groups).

[0050] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, "connected" or "coupled" in a mechanical structure may refer to a physical connection. For example, a physical connection may be a fixed connection, such as a fixed connection through a fixing member, such as a screw, bolt, or other fixing member; a physical connection may also be a detachable connection, such as a snap connection or a snap-fit connection; a physical connection may also be an integral connection, such as a welded connection, an adhesive connection, or an integrally formed connection. "Connected" or "coupled" in a circuit structure may refer to not only a physical connection but also an electrical connection or a signal connection. For example, it may be a direct connection, that is, a physical connection, or it may be indirectly connected through at least one intermediate element as long as the circuit is connected, and it may also be a connection inside two elements; a signal connection may refer to not only a signal connection through a circuit but also a signal connection through a media medium, such as radio waves. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0051] The trip assembly provided in the first embodiment of this application is applied to a circuit breaker, specifically as Figure 1 shown, Figure 1 is a schematic structural diagram of a trip assembly provided in an embodiment of this application. Among them, this type of trip assembly includes an armature 10, an electromagnet 20, a bracket 30, and an elastic member 40.

[0052] The bracket 30 is a support structure of the trip assembly, and its structure is as Figure 1 and Figure 2 shown, Figure 2Schematic diagram of the structure of a bracket involved in an embodiment of the present application. The bracket 30 is used to provide a mounting position for components such as the armature 10, the electromagnet 20 and the elastic member 40. The bracket 30 can be set as a three-dimensional structure formed by bending a plate, or can be set as a columnar three-dimensional structure, a cubic structure, etc., which is not limited here.

[0053] The armature 10 is a movable part in the trip assembly, and its structure is as follows: Figure 1 and Figure 3 As shown, Figure 3 Schematic diagram of the structure of an armature involved in an embodiment of the present application. After the armature 10 is installed in the trip assembly, the armature 10 can move relative to the bracket 30 and can act on the moving contact of the current circuit when it moves to a certain position.

[0054] In this embodiment, in order to prevent the armature 10 from being offset and causing the armature 10 to not move into place, a first connecting portion 11 is provided on the armature 10, and a second connecting portion 31 is provided on the bracket 30. The first connecting portion 11 and the second connecting portion 31 are rotatably connected to each other, so that the armature 10 can rotate on a fixed axis.

[0055] The first connection part 11 and the second connection part 31 can be set to one or more. The first connection part 11 and the second connection part 31 form a rotational fit, so that the armature 10 can rotate around a rotation axis. The rotation axis is a virtual axis, and the rotation axis is defined by the matching relationship between the first connection part 11 and the second connection part 31. For example, when a circular arc surface is provided on the first connection part 11 or the second connection part 31, and the first connection part 11 and the second connection part 31 rotate relative to each other based on the circular arc surface, the rotation axis of the armature 10 coincides with the axis of the circular arc surface.

[0056] There are many ways to set the specific structures of the first connecting part 11 and the second connecting part 31. For example, the first connecting part 11 and the second connecting part 31 can be set as a structure in which a protrusion structure matches a groove, or can be set as a shaft hole matching structure, which is not limited here.

[0057] For example, in a feasible implementation, Figure 4 and Figure 5 As shown, Figure 4 Schematic diagram of the structure of a trip assembly according to an embodiment of the present application when the active part is away from the electromagnet. Figure 5 The schematic diagram is a structural diagram of an active part of a trip assembly in an embodiment of the present application when it is attached to an electromagnet, wherein the first connecting part 11 is a rotating arm, the second connecting part 31 is a rotating groove, the rotating groove is formed by two groove walls at an angle to each other, the rotating arm is inserted into the rotating groove and can rotate around a fixed axis in the rotating groove.

[0058] Among them, the rotating arm can specifically be set as a protruding structure protruding from a certain side of the armature 10, and the rotating groove can be set as a concave groove relative to a certain side of the bracket 30. Alternatively, it can also be set in other structural forms.

[0059] In this method, the rotating groove is formed by two groove walls forming an angle. After the rotating wall is inserted into the rotating groove, the outer contour of the rotating arm contacts the groove walls, and thus rotates around a fixed axis under the restriction of the groove walls. Among them, the rotating groove provides stable support and guidance for the rotating arm, ensuring that the rotating arm does not shake or deviate during the rotation process. Moreover, it is convenient to dock between the rotating arm and the rotating groove. When it is necessary to replace the armature 10, it can be easily taken out from the rotating groove, and the installation and replacement of the armature 10 are more convenient.

[0060] The cooperation between the outer contour of the rotating wall and the groove walls of the rotating groove enables the armature 10 to rotate around a fixed axis. A more specific implementation method can be as Figure 6 and Figure 7 shown, Figure 6 is Figure 4 a partial enlarged schematic view of the A position in Figure 7 is Figure 5 a partial enlarged schematic view of the B position in

[0061] More specifically, it can be as Figure 6 and Figure 7 shown, set the contour surface where the rotating arm contacts the arc-shaped inner wall as an arc surface, such as also set the corners of the rotating arm as arc-shaped chamfers, so that the rotation of the rotating arm in the rotating groove is smoother, and it further ensures that the armature 10 can rotate around a fixed axis.

[0062] In this method, the outer contour of the rotating wall fits tightly with the arc-shaped inner wall, and the armature 10 rotates more smoothly and is not easily detached. Moreover, the surface contact increases the contact area between the rotating arm and the rotating groove, reducing the wear between the rotating arm and the rotating groove.

[0063] As Figure 3 shown, the armature 10 is also provided with an active part 12 and a driven part 13. The active part 12 is the part used to be adsorbed by electromagnetic force to perform active movement. There are many setting methods for the structural form of the active part 12. Specifically, it can be set as a flat structure such as a flat plate, or it can also be set as a protruding structure such as a boss or a rocker.

[0064] The driven part 13 is a component that moves along with the movement of the active part 12. There are also many setting methods for the structural form of the driven part 13. For example, it can be set as a strip, a block, etc., or it can be as Figure 3As shown, it is set to a hook-shaped structure with a certain length to facilitate cooperation with other components to cut off the current loop. There are many ways to arrange the orientations of the driven part 13 and the driving part 12. For example, the driven part 13 and the driving part 12 can be respectively arranged at opposite ends of the armature 10, or at other opposite orientations.

[0065] The first connecting part 11, the driving part 12, and the driven part 13 are all parts on the armature 10. In a feasible implementation manner, it can be as Figure 1 and Figure 3 shown, the first connecting part 11 is located between the driving part 12 and the driven part 13, so that when the armature 10 rotates, the driving part 12 and the driven part 13 swing in different areas.

[0066] In this way, the first connecting part 11 forms a fulcrum between the driving part 12 and the driven part 13, making the armature 10 form a lever structure, so that the movement amplitude of the driving part 12 corresponds to the movement amplitude of the driven part 13. The driven part 13 can move in place in a timely and effective manner following the movement of the driving part 12, with high transmission efficiency, fast reaction rate, and reasonable overall space distribution, more compact structure, and less interference between components.

[0067] Furthermore, the armature 10 can be made into a bent part to further optimize the spatial structure. For example, the driving part 12 and the driven part 13 form an angle with each other, and the first connecting part 11 is located at the intersection angle between the driving part 12 and the driven part 13, thereby further optimizing the spatial structure of the armature 10, reducing the movement space of the armature 10, and making the overall structure more compact.

[0068] When the driven part 13 moves, it can act on the moving contact of the current loop of the circuit breaker to cut off the current loop. There are many specific ways for the driven part 13 to act on the moving contact. Exemplarily, the driven part 13 can transmit the movement amplitude to the moving contact through transmission parts such as an actuating rod, so that the moving contact is separated from the static contact. Or, the driven part 13 can also be directly arranged opposite to the moving contact, so as to directly push open the moving contact in contact with the static contact when the driven part 13 moves.

[0069] In this embodiment, as Figure 1 shown, the driving part 12 is opposite to the electromagnet 20, and the elastic part 40 is connected between the armature 10 and the bracket 30, so that the driving part 12 can approach or move away from the electromagnet 20 under the magnetic force of the electromagnet 20 and the elastic force of the elastic part 40, and drive the driven part 13 to rotate. When the driving part 12 approaches the electromagnet 20, the driven part 13 separates the moving contact and the static contact in the current loop of the circuit breaker by rotating.

[0070] Among them, the electromagnet 20 is connected to the current loop of the circuit breaker, thereby generating a magnetic force that attracts the electromagnet 20. The elastic member 40 is connected between the armature 10 and the bracket 30, and always provides an elastic force for the armature 10 to keep the active part 12 away from the electromagnet 20. The active part 12 is simultaneously affected by the magnetic force of the electromagnet 20 and the elastic force of the elastic member 40, so that the active part 12 is away from the electromagnet 20 when the current loop is normal to ensure the normal operation of the current loop, and is attracted by the electromagnet 20 to cut off the current loop when the current loop is abnormal, thereby accurately controlling the cut-off timing of the current loop and achieving the purpose of controlling the on-off of the current loop, with strong controllability.

[0071] During the specific use process, when the circuit breaker is operating normally, the current value in the current loop is small, and the magnetic force generated by the electromagnet 20 is not sufficient to overcome the elastic force. As shown in Figure 4 , under the action of the elastic force, the active part 12 is always away from the electromagnet 20. The driven part 13 is located at the docking position, and the driven part 13 does not exert a force on the moving contact, and the current loop is in a normal conduction state.

[0072] When an overload or other situation occurs in the current loop of the circuit breaker, the current value in the current loop increases, and the magnetic force generated by the electromagnet 20 overcomes the elastic force. As shown in Figure 5 , under the action of the magnetic force, the active part 12 approaches the electromagnet 20 and is adsorbed, thereby driving the driven part 13 to rotate. The driven part 13 rotates from the docking position to the position where it triggers the moving contact, thereby acting on the moving contact and separating the moving contact and the static contact to disconnect the current loop.

[0073] In this embodiment, the elastic member 40 can be set in various structural forms. For example, it can be set as a spring, a spring sheet, etc. A feasible implementation manner is as shown in Figure 1 . The elastic member 40 is a spring. A first spring connection part 14 is provided on the armature 10, and a second spring connection part 32 is provided on the bracket 30. One end of the spring is connected to the first spring connection part 14, and the other end of the spring is connected to the second spring connection part 32, and the spring is in a stretched state. The pulling force of the spring is used to keep the active part 12 away from the electromagnet 20, and when the suction force of the electromagnet 20 is greater than the pulling force of the spring, the armature 10 is attracted to the electromagnet 20.

[0074] In this way, the armature 10 and the bracket 30 are connected by a spring, with a simple structure and easy maintenance. Moreover, the spring is in a stretched state, so that the elastic force received by the armature 10 is the pulling force of the spring, and the magnitude of the pulling force is easy to predict and the controllability is higher.

[0075] Furthermore, it can also be as shown in Figure 1 , the electromagnet 20 is located on the first side of the bracket 30, the second spring connection part 32 is located on the second side of the bracket 30, the first spring connection part 14 is located on the driven part 13, and the second side and the first side are opposite sides of the bracket 30.

[0076] In this way, when the spring is connected to the first spring connection part 14 and the second spring connection part 32, the spring and the electromagnet 20 are located on both sides of the bracket 30, so that there is no interference between the spring and the electromagnet 20, and at the same time, the overall structure is more compact.

[0077] There are also many setting methods for the specific structures of the first spring connection part 14 and the second spring connection part 32. For example, they can be set as cantilevers, hooks, rings, etc. A feasible implementation is as follows Figure 1 , Figure 2 and Figure 3 shown, the first spring connection part 14 is a cantilever protruding from the driven part 13, and the second spring connection part 32 is a hook protruding from the bracket 30. One end of the spring is hung on the cantilever, and the other end of the spring hooks the hook. Among them, the cantilever and the hook are convenient to process and are also convenient to connect with the spring.

[0078] In addition, in this embodiment, it can also be as Figure 1 shown, one or more resisting parts 33 are arranged on the bracket 30. The resisting parts 33 are located on the path of the driving part 12 away from the electromagnet 20, so that the driving part 12 moves between the resisting parts 33 and the electromagnet 20, thereby restricting the rotation of the armature 10 through the resisting parts 33, making the movable range of the armature 10 more reasonable and occupying less space. Among them, the resisting parts 33 can be set as flanges, blocks, etc., which are not limited here.

[0079] The above first embodiment details the tripping component. The following second embodiment introduces a circuit breaker including the tripping component of the above first embodiment, as follows.

[0080] The circuit breaker includes a moving contact, a static contact, and the tripping component of the first embodiment. The moving contact and the static contact are opposite to each other, and the moving contact is within the actuation range of the driven part of the tripping component, so as to be separated from the static contact under the action of the driven part.

[0081] Among them, the moving contact being within the actuation range of the driven part of the tripping component means that the moving contact can be driven by the driven part to be separated from the static contact during the movement of the driven part.

[0082] In a specific implementation, the tripping component can be arranged adjacent to the moving contact and the static contact, or can be separated from the moving contact and the static contact by a certain distance. The driven part of the armature in the tripping component can directly act on the moving contact to cut off the current circuit, or can indirectly act on the moving contact through transmission parts such as a tripping rod to cut off the current circuit.

[0083] The moving contact and the static contact form a switch structure in the current loop. When the moving contact and the static contact are connected, the current loop is closed. When the moving contact and the static contact are separated, the current loop is opened. The moving contact and the static contact can be respectively arranged on structures such as a contact plate and a contact bridge. And, other conductive structures can be arranged in the current loop, which is not limited here.

[0084] The specific structure of the tripping component in this circuit breaker corresponds to the tripping component in the foregoing embodiment. For the specific structure setting method, please refer to the relevant introduction of the tripping component in any embodiment related to the tripping component. The similarities will not be described in detail in this embodiment.

[0085] In this type of circuit breaker, the active part in the tripping component can drive the driven part to rotate around a fixed axis under the action of the magnetic force of the electromagnet and the elastic force of the elastic part. The armature in the tripping component will not produce offset, and the driven part can always move into place, so as to act on the moving contact to cut off the current loop, and the reliability of the circuit breaker is higher.

[0086] In summary, in the above-described tripping component and circuit breaker, the active part of the armature approaches or moves away from the electromagnet under the action of the magnetic force of the electromagnet and the elastic force of the elastic part, thereby driving the driven part to move, so that the driven part acts on the moving contact of the current loop to cut off the circuit, and its movement process is controllable. And, the first connecting part of the armature and the second connecting part of the bracket are connected to each other, so that the armature can only rotate around a fixed axis, restricting the movable range of the armature, making the armature not produce offset, and the driven part can move into place along the established track, without causing the circuit cutting to fail, thereby improving the reliability of the tripping component.

[0087] Those skilled in the art can understand that although some embodiments herein include certain features included in other embodiments rather than other features, the combination of the features of different embodiments means that it is within the scope of this application and forms different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0088] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

1. A tripping component, applied to a circuit breaker, characterized in that The trip assembly includes: an armature, an electromagnet, a bracket, and an elastic member; The armature is provided with a driving portion, a driven portion, and a first connecting portion; the bracket is provided with a second connecting portion; the first connecting portion and the second connecting portion are rotatably connected to each other, so that the armature can rotate about a fixed axis; The driving portion faces the electromagnet, and the elastic member is connected between the armature and the bracket; the driving portion can approach or move away from the electromagnet under the action of the magnetic force of the electromagnet and the elastic force of the elastic member, and drive the driven portion to rotate; The driven portion is used to drive the moving contact and the static contact in the current circuit of the circuit breaker to separate by rotating when the driving portion approaches the electromagnet.

2. The trip assembly according to claim 1, wherein, The first connecting portion is a rotating arm, and the second connecting portion is a rotating groove, and the rotating groove is formed by two groove walls forming an angle with each other; the rotating arm is inserted into the rotating groove and can rotate about a fixed axis in the rotating groove.

3. The trip assembly according to claim 2, wherein, An arc-shaped chamfer is provided at the angle of the rotating groove, and the rotating arm contacts the chamfer surface.

4. The trip assembly according to claim 1, wherein, The first connecting portion is located between the driving portion and the driven portion, so that when the armature rotates, the driving portion and the driven portion swing in different regions.

5. The trip assembly according to claim 4, wherein The driving portion and the driven portion form an angle with each other, and the first connecting portion is located at the intersection angle between the driving portion and the driven portion.

6. The trip assembly according to claim 1, wherein The bracket is provided with a blocking portion, and the blocking portion is located on the path where the driving portion is away from the electromagnet, so that the driving portion moves between the blocking portion and the electromagnet.

7. The trip assembly according to claim 1, characterized in that, The elastic member is a spring; The armature is provided with a first spring connecting portion, and the bracket is provided with a second spring connecting portion; one end of the spring is connected to the first spring connecting portion, and the other end of the spring is connected to the second spring connecting portion, and the spring is in a stretched state. The pulling force of the spring is used to keep the driving portion in a position away from the electromagnet, and when the suction force of the electromagnet is greater than the pulling force of the spring, the armature is attracted to the electromagnet.

8. The trip assembly according to claim 7, characterized in that, The electromagnet is located on the first side of the bracket, the second spring connecting portion is located on the second side of the bracket, and the first spring connecting portion is located on the driven portion; the second side and the first side are opposite sides of the bracket.

9. The trip assembly according to claim 8, wherein, The first spring connecting portion is a cantilever protruding from the driven portion, and the second spring connecting portion is a hook protruding from the bracket; one end of the spring is hung on the cantilever, and the other end of the spring hooks the hook.

10. A circuit breaker, characterized in that, The circuit breaker includes a moving contact, a static contact, and the trip assembly according to any one of claims 1-9; The moving contact and the static contact face each other, and the moving contact is within the actuation range of the driven portion of the trip assembly, so as to be separated from the static contact under the action of the driven portion.

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