Circuit breaker magnetic structure, tripping mechanism and circuit breaker

Abstract

The utility model provides a circuit breaker magnetic structure, a tripping mechanism and a circuit breaker, and relates to the technical field of electrical components. The circuit breaker magnetic structure comprises a current-carrying member, a magnet yoke, an armature and an elastic member. The current-carrying member is used for current circulation. The magnet yoke is provided with a bottom plate and two side plates connected to the bottom plate, and the two side plates are oppositely arranged. A containing space is defined by the bottom plate and the two side plates. The current-carrying member is at least partially located in the accommodation space. The armature is provided with a rotating end and a triggering end which are oppositely arranged, and the rotating end is rotationally arranged on the two side plates. The two ends of the elastic piece elastically act on the magnet yoke and the armature respectively and are used for applying acting force away from the magnet yoke to the trigger end. The problem of poor structure compactness of the circuit breaker is solved, and the production cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of electrical components, and particularly to a magnetic structure of a circuit breaker, a tripping mechanism and a circuit breaker. Background Art

[0002] A circuit breaker is an electrical device capable of controlling the on-off of current. When the current in the circuit where the circuit breaker is located is overloaded or short-circuited, the magnetic structure in the circuit breaker senses the overloaded current and controls the operation mechanism in the circuit breaker to act, thereby disconnecting the current in the circuit to avoid the danger and equipment loss caused by overload in the electrical system.

[0003] Specifically, the circuit breaker includes a current-carrying member, a magnetic yoke, an armature and an operation mechanism. The current-carrying member cooperates with the magnetic yoke, and both the magnetic yoke and the operation mechanism cooperate with the armature. The current-carrying member can conduct current. When the current passing through the current-carrying member is too large, the magnetic field sensed by the magnetic yoke is stronger, providing a magnetic force for the armature and driving the armature to rotate in the direction close to the magnetic yoke. During the process of the armature rotating in the direction close to the magnetic yoke, the armature will trigger the operation mechanism to cut off the current passing through the circuit breaker, achieving the purpose of protecting the circuit.

[0004] In the existing circuit breaker, the housing provides a rotation fulcrum for the armature, that is, the armature is rotatably connected to the housing. Thus, it is necessary to reserve an installation position for the armature on the housing, and the armature and the magnetic yoke are separately arranged, occupying a large space and affecting the structural compactness of the circuit breaker. Summary of the Utility Model

[0005] The present application provides a magnetic structure of a circuit breaker, a tripping mechanism and a circuit breaker to solve the problem of poor structural compactness of the circuit breaker.

[0006] In a first aspect, the present application provides a magnetic structure of a circuit breaker, including a magnetic yoke, a current-carrying member, an armature and an elastic member. The magnetic yoke has a bottom plate and two side plates connected to the bottom plate, and the two side plates are oppositely arranged. A receiving space is formed by enclosing between the bottom plate and the two side plates. The current-carrying member is used for conducting current, and at least part of the current-carrying member is located in the receiving space. The armature has a rotating end and a triggering end arranged oppositely, and the rotating end is rotatably arranged on the two side plates. The two ends of the elastic member respectively act on the magnetic yoke and the armature elastically, and are used for applying a force away from the magnetic yoke to the triggering end.

[0007] When adopting the above technical solution, the armature is rotatably connected to the magnetic yoke, and the rotating end of the armature is rotatably arranged on the two side plates. Moreover, the two ends of the elastic member are respectively connected to the magnetic yoke and the armature. An installation position for installing the armature and the elastic member can be set on the magnetic yoke, so that the magnetic yoke, the armature and the elastic member form an integral structure, improving the structural integrity of the magnetic structure of the circuit breaker. In addition, since the armature is installed on the magnetic yoke, there is no need to reserve an installation position for the armature on the housing, and the installation space inside the housing can be saved.

[0008] In a possible design, a rotating shaft is provided at the rotating end position on the armature. At least one side plate is provided with a notch, and the notch penetrates through the top surface of the yoke. There is an acute angle between the extending direction of the notch and the top surface of the yoke. The rotating shaft is rotatably arranged at one end of the notch away from the top surface of the yoke.

[0009] When the above technical solution is adopted, after the installation of the magnetic structure of the circuit breaker is completed, under the pulling force of the elastic member, the armature has a pulling force towards the rotating end, which can make the rotating end tightly pressed at the position of one end of the notch away from the top surface of the yoke.

[0010] In a possible design, a rotating shaft is provided at the rotating end position on the armature. At least one side plate is provided with a notch, and the notch includes a first channel, a second channel and a limiting hole that communicate with each other. The first channel penetrates through the top surface of the yoke. The rotating shaft enters the limiting hole through the first channel and the second channel; the limiting hole is used for rotational cooperation with the rotating shaft.

[0011] When the above technical solution is adopted, the first channel penetrates through the top surface of the yoke, indicating that the first channel has an opening towards the top surface of the yoke. The first channel, the second channel and the limiting hole are connected, and the rotating shaft can enter the limiting hole through the first channel and the second channel. The settings of the first channel and the second channel extend the installation path of the armature into the limiting hole. That is to say, the path for the armature to escape from the notch is extended, which can reduce the possibility of the armature escaping from the notch.

[0012] In a possible design, the second channel has a first end and a second end arranged oppositely, and the first end communicates with the first channel; the vertical distance between the first end and the top surface of the yoke is greater than the vertical distance between the second end and the top surface of the yoke.

[0013] When the above technical solution is adopted, after the installation of the magnetic structure of the circuit breaker is completed, under the pulling force of the elastic member, the armature has a pulling force towards the rotating end, which can make the rotating shaft tightly pressed at the position of the limiting hole. Moreover, the second channel is inclined. When the armature is subjected to a magnetic field force, the side of the second channel away from the bottom plate can provide a downward oblique pressure to the rotating shaft, and this pressure can prevent the rotating shaft from escaping from the notch through the second channel, reducing the possibility of the rotating shaft escaping from the notch and improving the firmness of the armature arranged on the yoke.

[0014] In a possible design, a mating surface is provided on one side of the rotating shaft away from the trigger end, and there is an angle γ between the mating surface and the bottom surface of the armature, where 20° ≤ γ ≤ 40°. The connection position between the limiting hole and the second channel includes a first connection line and a second connection line, and the surface of the second channel close to the bottom plate is tangent to the limiting hole at the second connection line. During the process of the rotating shaft entering the limiting hole through the second channel, the surface of the second channel close to the bottom plate fits with the mating surface.

[0015] When adopting the above technical solution, during the process of installing the armature on the yoke, the mating surface can be fitted with the surface of the second channel close to the bottom plate, so that the rotating shaft slides along the second channel to the position of the limiting hole. The second channel plays a guiding role during the installation of the rotating shaft, facilitating the installation of the armature.

[0016] In a possible design, the diameter of the rotating shaft is d, the limiting hole has a diameter D, and D≥d; the perpendicular distance from the axis of the rotating shaft to the mating surface is L; the perpendicular distance between the first connecting line and the second connecting line is b, and b≥L + d / 2.

[0017] When adopting the above technical solution, it is ensured that the rotating shaft can enter the limiting hole through the first connecting line.

[0018] In a possible design, d / 2 - L≤d / 3.

[0019] When adopting the above technical solution, the area of the mating surface is within a certain range. When the area of the mating surface is large, the contact area between the rotating shaft and the hole wall of the limiting hole is small, and the contact stability between the rotating shaft and the limiting hole is low.

[0020] In a possible design, the yoke is an integral structure; and / or, the armature is an integral structure.

[0021] When adopting the above technical solution, the yoke being an integral structure shortens the processing time of the yoke and improves the structural firmness of the yoke. The armature being an integral structure means that during actual installation, there is no need to assemble the armature, and the processed armature can be directly installed in the circuit breaker, making the installation operation more convenient.

[0022] In a second aspect, an embodiment of the present application provides a tripping mechanism, including a static contact, an operating mechanism, and the circuit breaker magnetic structure described in the first aspect above. The static contact is arranged on the circuit breaker magnetic structure. The operating mechanism includes a moving contact, and the moving contact is used to cooperate with the static contact. The operating mechanism is arranged on the rotation path of the armature included in the circuit breaker magnetic structure. When the triggering end of the armature rotates towards the direction close to the yoke included in the circuit breaker magnetic structure, the triggering end triggers the operating mechanism to separate the static contact and the moving contact.

[0023] The beneficial effects of the tripping mechanism described in the second aspect can refer to the beneficial effects of the circuit breaker magnetic structure described in the first aspect, which will not be elaborated here.

[0024] In a third aspect, an embodiment of the present application further provides a circuit breaker, including a housing and the tripping mechanism described in the second aspect. The housing has a receiving cavity, and a limiting portion is arranged inside the housing. The tripping mechanism is arranged in the receiving cavity, and the limiting portion is used to limit the position of the triggering end of the armature included in the tripping mechanism.

[0025] The beneficial effects of the circuit breaker described in the third aspect can be referred to the beneficial effects of the tripping mechanism described in the second aspect, which will not be elaborated here. Description of the Drawings

[0026] Figure 1 Schematic diagram of the positional relationship between the magnetic structure and the static contact of the circuit breaker provided in the embodiment of the present application.

[0027] Figure 2 Schematic diagram of a yoke in an example provided in the embodiment of the present application.

[0028] Figure 3 Schematic diagram of a yoke in another example provided in the embodiment of the present application.

[0029] Figure 4 For Figure 3 side view schematic diagram.

[0030] Figure 5 Schematic diagram of the armature provided in the embodiment of the present application.

[0031] Figure 6 For Figure 5 side view schematic diagram.

[0032] Figure 7 Schematic diagram of the circuit breaker provided in the embodiment of the present application.

[0033] Figure 8 For Figure 7 partial schematic diagram at A in

[0034] Description of the Reference Numerals:

[0035] 100, housing; 110, limiting portion;

[0036] 200, tripping mechanism;

[0037] 210, circuit breaker magnetic structure; 211, current-carrying member; 212, yoke; 2121, bottom plate; 2122, side plate; 2123, supporting portion; 21221, notch; 212211, first channel; 212212, second channel; 212213, limiting hole; 21222, shaft hole; 213, armature; 2131, armature body; 2132, rotating shaft; 2133, connecting ear; 2134, connecting portion; 214, elastic member;

[0038] 220, static contact;

[0039] 230, operating mechanism; 231, moving contact. Detailed Description of the Embodiment

[0040] 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 with reference to 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 making creative efforts shall fall within the scope of protection of this application.

[0041] 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 specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the accompanying drawings are intended to cover non-exclusive inclusion.

[0042] Reference to "embodiment" herein means that a particular feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0043] The term "and / or" herein is only used to describe an association relationship of associated objects and means that three relationships may exist. For example, A and / or B may represent: the existence of A, the simultaneous existence of A and B, and the existence of B. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0044] The orientation terms appearing in the following description are all the directions shown in the figures and do not limit the specific structure of the current-limiting module of this application. For example, in the description of this application, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 therefore cannot be construed as a limitation of this application.

[0045] 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 and are not used to describe a specific order, and may explicitly or implicitly include one or more of such features.

[0046] In the description of the present application, unless otherwise specified, the meaning of "a plurality" refers to more than two (including two). Similarly, "a plurality of groups" refers to more than two groups (including two groups).

[0047] In the description of the present application, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, the "connection" or "coupling" of a mechanical structure can refer to a physical connection. For example, a physical connection can be a fixed connection, such as a fixed connection through a spacer, such as a fixed connection through screws, bolts, or other spacers; a physical connection can also be a detachable connection, such as a snap connection or a snap-fit connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. The "connection" or "coupling" of a circuit structure can refer to not only a physical connection but also an electrical connection or a signal connection. For example, it can be a direct connection, that is, a physical connection, or it can be indirectly connected through at least one intermediate element, as long as the circuit is connected. It can also be the connection of two elements inside. In addition to the signal connection through a circuit, the signal connection can also refer to the 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 the present application can be understood according to specific circumstances.

[0048] In a first aspect, please refer to Figure 1 As shown, the present application provides a circuit breaker magnetic structure, including a yoke 212, a current-carrying member 211, an armature 213, and an elastic member 214. Among them, the yoke 212 has a bottom plate 2121 and two side plates 2122 connected to the bottom plate 2121, and the two side plates 2122 are arranged oppositely. A receiving space is formed by enclosing between the bottom plate 2121 and the two side plates 2122. The current-carrying member 211 is used for conducting current, and at least a part of the current-carrying member 211 is located in the receiving space. The armature 213 has a rotating end and a triggering end arranged oppositely, and the rotating end is rotatably arranged on the two side plates 2122. The two ends of the elastic member 214 elastically act on the yoke 212 and the armature 213 respectively, and are used to apply a force to the triggering end to move away from the yoke 212.

[0049] As Figures 1 to 3 shown, the yoke 212 has a bottom plate 2121 and two side plates 2122 connected to the bottom plate 2121, and the two side plates 2122 are arranged oppositely. The bottom plate 2121 can be a rectangular plate-like structure, and the two side plates 2122 are respectively arranged on the long sides of the bottom plate 2121. The two side plates 2122 are arranged oppositely, that is, the two side plates 2122 are symmetrically arranged with respect to the mid-plane parallel to the long side direction of the bottom plate 2121.

[0050] In actual situations, the side plates 2122 can be perpendicular to the bottom plate 2121, or there can be an acute or obtuse angle between the side plates 2122 and the bottom plate 2121. It should be noted here that when there is an acute angle between the side plates 2122 and the bottom plate 2121, that is, the distance between the sides of the two side plates 2122 away from the bottom plate 2121 is less than the distance between the sides of the two side plates 2122 connected to the bottom plate 2121. Similarly, when there is an obtuse angle between the side plates 2122 and the bottom plate 2121, that is, the distance between the sides of the two side plates 2122 away from the bottom plate 2121 is greater than the distance between the sides of the two side plates 2122 connected to the bottom plate 2121.

[0051] Taking the case where the side plates 2122 are perpendicular to the bottom plate 2121 as an example, the cross-section of the magnetic yoke 212 is U-shaped, and an accommodation space with openings at both ends and the top is formed by enclosing between the two side plates 2122 and the bottom plate 2121. Among them, the top of the magnetic yoke 212 refers to a part opposite to the position of the bottom plate 2121, or refers to the part far from the bottom plate 2121. The top surface of the magnetic yoke 212 refers to the surface of the side plate 2122 away from the bottom plate 2121.

[0052] The two side plates 2122 and the bottom plate 2121 can be integrally formed by stamping. Of course, the side plates 2122 and the bottom plate 2121 can also be connected by welding, and no specific limitation is made here.

[0053] In the embodiment provided by the present application, the magnetic yoke 212 is made of a magnetic material, and is mainly used to enhance the magnetic field force, concentrate the magnetic field, control the propagation direction of the magnetic field, or guide the magnetic field to a specific area.

[0054] During specific implementation, the current-carrying member 211 is a conductive structure fixed in the circuit breaker housing 100. One end of the current-carrying member 211 is connected to the current inlet where the current from the external power supply flows into the circuit breaker, and the static contact 220 included in the circuit breaker can be arranged at the other end of the current-carrying member 211, and the current in the circuit breaker flows through the current-carrying member 211.

[0055] The specific structure of the current-carrying member 211 is not specifically limited here and shall be subject to the actual situation. It should be noted that the middle part of the current-carrying member 211 can be located inside the accommodation space. The two ends of the current-carrying member 211 are located outside the accommodation space, so as to facilitate the connection of one end of the current-carrying member 211 to the current inlet where the current from the external power supply flows into the circuit breaker, and at the same time is conducive to the installation of the static contact 220 at the other end.

[0056] In addition, the portion of the current-carrying member 211 located within the accommodation space may be a plate-like structure. This plate-like structure may be parallel to the bottom plate 2121. Of course, this plate-like structure may also be inclined with respect to the bottom plate 2121. Further, this plate-like structure may be in contact with the bottom plate 2121, or there may be a gap between the plate-like structure and the bottom plate 2121, and no specific limitation is made here.

[0057] During actual installation, one end of the current-carrying member 211 may pass through the accommodation space along the length direction of the bottom plate 2121. Alternatively, the current-carrying member 211 may enter the accommodation space through the opening on the top surface of the yoke 212, which facilitates the installation operations of the current-carrying member 211 and the yoke 212.

[0058] The armature 213 has a rotating end and a triggering end arranged oppositely, and the rotating end is rotatably arranged on the two side plates 2122.

[0059] During specific implementation, a connecting shaft may be provided on the side of the side plate 2122 facing the accommodation space, and a connecting hole rotatably matched with the connecting shaft may be provided on the side of the rotating end of the armature 213 corresponding to the side plate 2122. The connecting shaft and the connecting hole cooperate with each other, so that the triggering end of the armature 213 can rotate around the axis of the rotating shaft 2132, thereby realizing the rotation of the triggering end in the direction of approaching or departing from the yoke 212.

[0060] The yoke 212 can sense the magnetic field and provide a magnetic force for the armature 213. The magnetic force can attract the triggering end of the armature 213 to rotate in the direction of approaching the yoke 212 until the armature 213 is buckled on the top surface of the yoke 212. Among them, during the process of the armature 213 rotating in the direction of approaching the yoke 212, the armature 213 will trigger the operation mechanism 230 included in the circuit breaker to act, so as to cut off the current passing through the circuit breaker, achieving the purpose of protecting the circuit and avoiding the dangers and equipment losses caused by overload or short circuit of the electrical system.

[0061] As Figure 1 shown, the two ends of the elastic member 214 elastically act on the yoke 212 and the armature 213 respectively, and are used to apply a force to the triggering end in the direction of departing from the yoke 212.

[0062] During specific implementation, one end of the elastic member 214 is connected to the yoke 212, and the end of the elastic member 214 connected to the yoke 212 is located at a position close to the rotating end of the armature 213. The other end of the elastic member 214 is connected to the triggering end of the armature 213.

[0063] In actual situations, the direction of the elastic force received by the elastic member 214 is not parallel to the length direction of the armature 213, so as to avoid the phenomenon that the triggering end of the armature 213 cannot rotate when the direction of the elastic force received by the armature 213 is along the length direction of the armature 213.

[0064] In view of this, a support portion 2123 may be provided at the top of the yoke 212 and near the rotating end of the armature 213. The support portion 2123 is used to connect the elastic member 214. Refer to Figures 2 to 4 as shown.

[0065] Similarly, as shown in Figure 5 and Figure 6 , a connecting portion 2134 may be provided at the triggering end of the armature 213 for connecting to one end of the elastic member 214.

[0066] In this case, the yoke 212 may be an integral structure. That is, the bottom plate 2121, the two side plates 2122 and the support portion 2123 included in the yoke 212 may be formed by one-time stamping of a plate-like structure, which shortens the processing time of the yoke 212 and improves the structural firmness of the yoke 212.

[0067] As an example, the elastic member 214 may be a tension spring. In this way, both the triggering end of the armature 213 and the yoke 212 are subjected to the pulling force of the tension spring. The tension spring has characteristics such as shock absorption, buffering, flexibility, and long service life. Setting the elastic member 214 as a tension spring can enhance the stability and reliability of the movement of the armature 213.

[0068] In actual situations, the armature 213 has a normal working position and an abnormal triggering position.

[0069] When the current flowing through the current-carrying member 211 is less than the threshold value, the magnetic force of the armature 213 from the yoke 212 is small, and the pulling force of the elastic member 214 on the armature 213 is greater than the magnetic force on the armature 213, so that the armature 213 is in the normal working position. The triggering end of the armature 213 is located at a position far from the yoke 212.

[0070] When there is an overcurrent or short-circuit phenomenon in the circuit where the circuit breaker is located, the current flowing through the current-carrying member 211 is greater than the threshold value. At this time, the magnetic field induced by the yoke 212 is stronger, the magnetic force of the armature 213 from the yoke 212 is greater, and the pulling force of the elastic member 214 on the armature 213 is less than the magnetic force on the armature 213. In this case, it drives the triggering end to rotate towards the direction close to the yoke 212 until the armature 213 is buckled on the top surface of the yoke 212, so that the armature 213 is in the abnormal triggering position.

[0071] In the circuit breaker magnetic structure 210 provided in the embodiment of the present utility model, the rotating end of the armature 213 is rotatably arranged on the two side plates 2122, so that the armature 213 can be rotatably connected to the yoke 212. That is to say, the armature 213 is installed on the yoke 212 in this application. Therefore, there is no need to reserve an installation position for the armature 213 on the housing 100, which can save the installation space inside the housing 100 and improve the structural compactness of the circuit breaker.

[0072] Moreover, both ends of the elastic member 214 are respectively connected to the yoke 212 and the armature 213. Installation positions for the armature 213 and the elastic member 214 can be provided on the yoke 212, such that the yoke 212, the armature 213, and the elastic member 214 form an integral structure, enhancing the structural integrity of the circuit breaker magnetic structure 210. In this way, the yoke 212, the armature 213, and the elastic member 214 can be installed as a whole within the housing, reducing the difficulty of installing the yoke 212, the armature 213, and the elastic member 214 into the housing, and facilitating the improvement of the assembly efficiency of the circuit breaker magnetic structure 210 into the housing.

[0073] In a possible implementation, referring to Figure 5 and Figure 6 as shown, a rotating shaft 2132 is provided at the position of the rotating end on the armature 213.

[0074] In fact, the armature 213 may include an armature body 2131 and a rotating shaft 2132, and the armature body 2131 may be a plate-like structure. The armature body 2131 has a rotating end and a triggering end. At the rotating end, rotating shafts 2132 are provided at positions on the armature body 2131 close to the two side plates 2122, so as to facilitate the rotational connection between the rotating shaft 2132 and the yoke 212. The length and diameter of the rotating shaft 2132 are determined according to actual situations and are not specifically limited herein.

[0075] The rotating shaft 2132 can be directly provided on the two side surfaces of the armature body 2131 close to the two side plates 2122, that is, a rotating shaft 2132 is provided on each of the two side surfaces of the armature body 2131 corresponding to the two side plates 2122. That is to say, two rotating shafts 2132 are installed on one armature body 2131. Of course, for the convenience of setting the rotating shaft 2132, referring to Figure 5 and Figure 6 as shown, at the rotating end of the armature body 2131 and at a position of the armature body 2131 close to the bottom plate 2121, two connecting ears 2133 are provided, and mounting holes for installing the rotating shaft 2132 are formed in the connecting ears 2133.

[0076] It should be understood that the rotating shaft can rotate relative to the yoke, so the rotating shaft 2132 is a cylindrical structure.

[0077] During specific implementation, the rotating shaft 2132 can be connected to the armature body 2131 by means of welding, clamping, threaded connection, etc.

[0078] In the embodiments provided in the present application, the armature 213 has an integral structure. That is, the armature body 2131, the connecting ear 2133, and the rotating shaft 2132 form an integral structure. During actual installation, there is no need to assemble the armature body 2131, the connecting ear 2133, and the rotating shaft 2132 to form the armature 213, nor is it necessary to debug the relative positions of the armature 213, the connecting ear 2133, and the rotating shaft 2132. The processed armature 213 can be directly installed in the circuit breaker, and the installation operation is relatively convenient.

[0079] As a possible implementation manner, the armature 213 can be processed by a one-time stamping method. In this way, the structural strength of the armature 213 can be improved, and the structural stability can be enhanced. Of course, the forming method of the armature 213 is not limited to this.

[0080] In some embodiments, as shown in Figure 2 at least one side plate 2122 is provided with a notch 21221, and the notch 21221 penetrates through the top surface of the yoke 212. The extending direction of the notch 21221 has an acute angle with the top surface of the yoke 212. The rotating shaft 2132 is rotatably arranged at one end of the notch 21221 away from the top surface of the yoke 212.

[0081] It should be noted that in the embodiments provided in the present application, the top surface of the yoke 212 is the side of the yoke 212 away from the bottom plate 2121. As shown in the schematic diagram of the yoke in Figures 2 to 3 at this time, the bottom plate 2121 is placed horizontally, and the side of the side plate 2122 away from the bottom plate is the top surface of the yoke 212. The notch 21221 penetrates through the top surface of the yoke 212, indicating that the notch 21221 has an opening facing the top surface of the yoke 212.

[0082] The extending direction of the notch 21221 has an acute angle with the top surface of the yoke 212. For the convenience of understanding, the angle between the extending direction of the notch 21221 and the top surface of the yoke 212 is defined as α, as shown in Figure 2 α is less than 90°, and the notch 21221 is inclined from the end close to the bottom plate 2121 to the end close to the top surface of the yoke 212, and is inclined in the direction close to the triggering end.

[0083] In this way, after the magnetic structure 210 of the circuit breaker is installed, under the pulling force of the elastic member 214, the armature 213 has a pulling force towards the rotating end, which can make the rotating end tightly abut against the position at one end of the notch 21221 away from the top surface of the yoke 212.

[0084] Specifically, α can be 30°, 45°, 60°, 75°, etc., which is not specifically limited here, as long as it can facilitate the installation of the armature 213 and improve the limiting effect on the armature 213.

[0085] In specific implementation, notches 21221 can be provided at corresponding positions on the two side plates 2122. In this case, during the process of installing the armature 213 on the yoke 212, after aligning and matching the positions of the armature 213 and the yoke 212, the rotating shaft 2132 can enter the notch 21221 from the top surface of the yoke 212 and slide along the extending direction of the notch 21221 to the side away from the top surface of the yoke 212, so that the rotating shaft 2132 is rotatably arranged at one end of the notch 21221 away from the top surface of the yoke 212. In this way, it is convenient for the installation of the rotating shaft 2132.

[0086] Of course, notches 21221 can also be provided on any one of the two side plates 2122, and shaft holes 21222 are provided at positions corresponding to the ends of the notches 21221 away from the top surface of the yoke 212 on the other side plate 2122. In this case, during the process of installing the armature 213 on the yoke 212, after aligning and matching the positions of the armature 213 and the yoke 212, one end of the rotating shaft 2132 corresponding to the shaft hole 21222 can be inserted into the shaft hole 21222, and then the rotating shaft 2132 corresponding to the notch 21221 can enter the notch 21221 from the top surface of the yoke 212 and slide along the extending direction of the notch 21221 to the side away from the top surface of the yoke 212. One rotating shaft 2132 is rotatably arranged at one end of the notch 21221 away from the top surface of the yoke 212, and the other rotating shaft 2132 is rotatably arranged in the shaft hole 21222.

[0087] In this way, not only is it convenient for the installation of the rotating shaft 2132, but also, since the shaft hole 21222 cooperates with the rotating shaft 2132, the position of the rotating shaft 2132 relative to the yoke 212 is not easily changed, and the shaft hole 21222 can limit the rotating shaft 2132, which can improve the stability of the cooperation between the armature 213 and the yoke 212.

[0088] In some other embodiments, a rotating shaft 2132 is provided at the rotating end position on the armature 213. The setting method of the rotating shaft 2132 here can refer to the foregoing and will not be elaborated here.

[0089] Further, at least one side plate 2122 is provided with a notch 21221. Refer to Figure 3 and Figure 4 As shown, the notch 21221 includes a first channel 212211, a second channel 212212 and a limiting hole 212213 that are communicated with each other. The first channel 212211 penetrates the top surface of the yoke 212. The rotating shaft 2132 enters the limiting hole 212213 through the first channel 212211 and the second channel 212212, and the limiting hole 212213 is used for rotational cooperation with the rotating shaft 2132.

[0090] When adopting the above technical solution, the first channel 212211 penetrates through the top surface of the yoke 212, indicating that the first channel 212211 has an opening facing the top surface of the yoke 212. The first channel 212211, the second channel 212212 and the limiting hole 212213 are connected. The rotating shaft 2132 can enter the limiting hole 212213 through the first channel 212211 and the second channel 212212. The arrangements of the first channel 212211 and the second channel 212212 extend the installation path for the armature 213 to enter the limiting hole 212213. In this way, the path for the armature 213 to escape from the notch 21221 is also extended, which can reduce the possibility of the armature 213 escaping from the notch 21221.

[0091] The extending modes of the first channel 212211 and the second channel 212212 are not specifically limited herein and can be linear, curved, etc.

[0092] During specific operation, notches 21221 can be opened at corresponding positions on the two side plates 2122. In this case, during the process of installing the armature 213 on the yoke 212, after aligning and matching the positions of the armature 213 and the yoke 212, the rotating shaft 2132 can enter the notch 21221 from the top surface of the yoke 212 and enter the limiting hole 212213 along the first channel 212211 and the second channel 212212.

[0093] Certainly, notches 21221 can also be opened on any one of the two side plates 2122, and shaft holes 21222 are opened at positions corresponding to the ends of the notches 21221 far from the top surface of the yoke 212 on the other side plate 2122. In this case, during the process of installing the armature 213 on the yoke 212, after aligning and matching the positions of the armature 213 and the yoke 212, one end of the rotating shaft 2132 corresponding to the shaft hole 21222 can be inserted into the shaft hole 21222, and then the rotating shaft 2132 corresponding to the notch 21221 can enter the first channel 212211 from the top surface of the yoke 212 and enter the limiting hole 212213 along the first channel 212211 and the second channel 212212.

[0094] In an alternative mode, please continue to refer to Figure 3 and Figure 4 , the second channel 212212 has a first end and a second end arranged oppositely, and the first end is connected to the first channel 212211. The vertical distance between the first end and the top surface of the yoke 212 is greater than the vertical distance between the second end and the top surface of the yoke 212.

[0095] At this time, the second channel 212212 is a straight channel, with the first end communicating with the first channel 212211 and the second end communicating with the limiting hole 212213. The vertical distance between the first end and the top surface of the yoke 212 is greater than the vertical distance between the second end and the top surface of the yoke 212. Thus, the second channel 212212 is inclined, and the second channel 212212 obliquely approaches the bottom plate 2121 from the second end to the first end.

[0096] With such a setting, after the installation of the circuit breaker magnetic structure 210 is completed, under the pulling force of the elastic member 214, the armature 213 has a pulling force towards the rotating end, which can make the rotating shaft 2132 press tightly at the position of the limiting hole 212213. Moreover, since the second channel 212212 is inclined, when the armature 213 is subjected to a magnetic force, the side of the second channel 212212 away from the bottom plate 2121 can provide an obliquely downward pressure to the rotating shaft 2132. This pressure can prevent the rotating shaft 2132 from disengaging from the notch 21221 through the second channel 212212, reducing the possibility of the rotating shaft 2132 disengaging from the notch 21221 and improving the firmness of the armature 213 arranged on the yoke 212.

[0097] It should be noted that the extension direction and dimensions of the first channel 212211 are not specifically limited here, as long as it is ensured that the rotating shaft 2132 can enter and pass through the first channel 212211.

[0098] In a possible implementation manner, as Figure 6 shown, a mating surface is provided on the side of the rotating shaft 2132 away from the triggering end. There is an included angle γ between the mating surface and the bottom surface of the armature 213, where 20° ≤ γ ≤ 40°. γ can be 20°, 25°, 28°, 32°, 35°, 40°, etc., which is not specifically limited here.

[0099] Specifically, a part of the side of the rotating shaft 2132 away from the triggering end can be cut off to form the mating surface. In actual situations, the rotating shaft 2132 with the mating surface, the connecting ear 2133, and the armature body 2131 can be formed by one stamping. During the installation process, there is no need to debug the relative positions of the armature 213, the connecting ear 2133, and the rotating shaft 2132.

[0100] Furthermore, the connection position of the limiting hole 212213 and the second channel 212212 includes a first connection line and a second connection line. The surface of the second channel 212212 close to the bottom plate 2121 is tangent to the limiting hole 212213 at the position of the second connection line. During the process of the rotating shaft 2132 entering the limiting hole 212213 through the second channel 212212, the surface of the second channel 212212 close to the bottom plate 2121 fits with the mating surface.

[0101] In this way, during the process of installing the armature 213 on the yoke 212, the mating surface can be attached to the surface of the second channel 212212 close to the bottom plate 2121, so that the rotating shaft 2132 slides along the second channel 212212 to the position of the limiting hole 212213. The second channel 212212 plays a guiding role during the installation process of the rotating shaft 2132, facilitating the installation of the armature 213.

[0102] As an example, please refer to Figure 4 and Figure 6 , the diameter of the rotating shaft 2132 is d, and the limiting hole 212213 has a diameter D, D≥d, to ensure that the rotating shaft 2132 can enter the limiting hole 212213.

[0103] Refer to Figure 4 , Figure 6 and Figure 7 As shown in, the vertical distance from the axis of the rotating shaft 2132 to the mating surface is L, and the vertical distance between the first connecting line and the second connecting line is b, b≥L + d / 2. In this way, it is ensured that the rotating shaft 2132 can enter the limiting hole 212213 through the first connecting line.

[0104] It should be noted that in the embodiment provided in the present application, during the process of installing the armature 213 on the yoke 212, the mating surface can be attached to the surface of the second channel 212212 close to the bottom plate 2121 and slide through the second channel 212212 into the limiting hole 212213. After the breaker magnetic structure 210 provided in the embodiment of the present application is installed in the breaker housing 100, the trigger end of the armature 213 needs to rotate a certain angle in the direction close to the yoke 212 so that the trigger end is limited on the limiting portion 110 in the housing 100. At this time, under the pulling force of the elastic member 214, the side of the trigger end away from the yoke 212 is closely attached to the limiting portion 110.

[0105] When there is an overcurrent or short - circuit phenomenon in the circuit where the breaker is located, the magnetic field induced by the yoke 212 is relatively strong, the magnetic force received by the armature 213 is relatively large, and the pulling force received by the armature 213 from the elastic member 214 is less than the magnetic force received by the armature 213, driving the trigger end to rotate in the direction close to the yoke 212. In this case, the part of the rotating shaft 2132 close to the top surface of the yoke 212 contacts the inner wall of the limiting hole 212213, and the inner wall of the limiting hole 212213 can provide an obliquely downward pressure to the rotating shaft 2132, which can prevent the rotating shaft 2132 from disengaging from the notch 21221 through the second channel 212212, reducing the possibility of the rotating shaft 2132 disengaging from the notch 21221 and improving the firmness of the armature 213 installed on the yoke 212.

[0106] As an alternative, such asFigure 4 and Figure 6 As shown in Figure 6 , d / 2 - L ≤ d / 3. That is to say, in order to form a mating surface on the rotating shaft 2132, a part of the rotating shaft 2132 needs to be removed, and the maximum dimension of the removed part of the rotating shaft 2132 in the radial direction of the rotating shaft 2132 is less than or equal to 1 / 3 of the diameter d of the rotating shaft 2132.

[0107] It can be understood that the larger the value of L, the smaller the area of the mating surface. On the contrary, the smaller the value of L, the larger the area of the mating surface.

[0108] And d / 2 - L ≤ d / 3 makes the area of the mating surface within a certain range. To avoid the situation that when the area of the mating surface is large, the contact area between the rotating shaft 2132 and the hole wall of the limiting hole 212213 is small, and the contact stability between the rotating shaft 2132 and the limiting hole 212213 is low.

[0109] In a second aspect, an embodiment of the present application provides a tripping mechanism. Referring to Figure 7 and Figure 8 As shown in Figure 8 , the tripping mechanism includes a static contact 220, an operating mechanism 230, and the above-mentioned circuit breaker magnetic structure 210. The static contact 220 is arranged on the circuit breaker magnetic structure 210. Specifically, the static contact 220 is fixedly arranged at one end of the current-carrying member 211.

[0110] The operating mechanism 230 includes a moving contact 231, and the moving contact 231 is used to cooperate with the static contact 220. When the static contact 220 contacts the moving contact 231, the current in the circuit breaker is conducted, and the circuit where the circuit breaker is located works normally. When the static contact 220 is separated from the moving contact 231, the current in the circuit breaker is disconnected, and the circuit where the circuit breaker is located is disconnected.

[0111] The operating mechanism 230 is arranged on the rotation path of the armature 213 included in the circuit breaker magnetic structure 210. When the triggering end of the armature 213 rotates in the direction close to the magnetic yoke 212 included in the circuit breaker magnetic structure 210, the triggering end triggers the operating mechanism 230 to separate the static contact 220 and the moving contact 231.

[0112] Specifically, when the current flowing through the current-carrying member 211 is less than the threshold value, the magnetic force received by the armature 213 from the magnetic yoke 212 is small, and the pulling force received by the armature 213 from the elastic member 214 is greater than the magnetic force received by the armature 213, so that the armature 213 is in the normal working position. The triggering end of the armature 213 is located at a position far from the magnetic yoke 212.

[0113] When there is an overcurrent or short - circuit phenomenon in the circuit where the circuit breaker is located, the current flowing through the current - carrying member 211 is greater than the threshold value. At this time, the magnetic field induced by the magnetic yoke 212 is relatively strong, the magnetic force on the armature 213 from the magnetic yoke 212 is relatively large, and the pulling force of the elastic member 214 on the armature 213 is less than the magnetic force on the armature 213. In this case, the trigger end is driven to rotate towards the direction close to the magnetic yoke 212 until the armature 213 is latched on the top surface of the magnetic yoke 212. During the process of the trigger end rotating towards the direction close to the magnetic yoke 212, the trigger end can trigger the operating mechanism 230. Further, the static contact 220 and the moving contact 231 are separated, cutting off the current in the circuit breaker, achieving the purpose of protecting the circuit where the circuit breaker is located.

[0114] In addition to the above, please refer to Figure 7 As shown, the embodiment of the present application further provides a circuit breaker, including a housing 100 and the tripping mechanism described in the second aspect. The housing 100 has an accommodation cavity, and a limiting portion 110 is arranged inside the housing 100. The tripping mechanism is arranged in the accommodation cavity, and the limiting portion 110 is used to limit the position of the trigger end of the armature 213 included in the tripping mechanism.

[0115] Specifically, during implementation, the structure and size of the housing 100 are adjusted accordingly according to the design and application requirements of the specific circuit breaker. The limiting portion 110 can be a limiting block or a limiting post arranged on the inner wall of the housing 100. After installing the magnetic structure 210 of the circuit breaker provided by the embodiment of the present application into the housing 100 of the circuit breaker, under the pulling force of the elastic member 214, the side of the trigger end far from the magnetic yoke 212 is closely attached to the limiting portion 110, which is used to prevent the armature 213 from continuing to rotate in the direction away from the magnetic yoke 212, controlling the rotation process of the armature 213 within a suitable range, so as not to make the rotation range too large, thereby increasing the installation position of the armature 213 in the housing 100, achieving the purpose of controlling the volume of the housing 100 and thus reducing the production cost.

Claims

1. A magnetic structure of a circuit breaker, characterized in that, Comprising: A yoke having a bottom plate and two side plates connected to the bottom plate, the two side plates being oppositely arranged; An accommodation space is formed by enclosing between the bottom plate and the two side plates; A current-carrying member for conducting current; at least a part of the current-carrying member is located in the accommodation space; An armature having a rotating end and a triggering end arranged oppositely; the rotating end is rotatably arranged on the two side plates; An elastic member, with two ends of the elastic member elastically acting on the yoke and the armature respectively, for applying a force to the triggering end away from the yoke.

2. The circuit breaker magnetic structure according to claim 1, characterized in that, A rotating shaft is arranged at the position of the rotating end on the armature; At least one of the side plates is provided with a notch, the notch penetrating through the top surface of the yoke; an acute angle is formed between the extending direction of the notch and the top surface of the yoke; the rotating shaft is rotatably arranged at one end of the notch away from the top surface of the yoke.

3. The magnetic structure of the circuit breaker according to claim 1, characterized in that, A rotating shaft is arranged at the position of the rotating end on the armature; At least one of the side plates is provided with a notch, the notch including a first channel, a second channel and a limiting hole which are communicated with each other, the first channel penetrating through the top surface of the yoke; the rotating shaft enters the limiting hole through the first channel and the second channel; The limiting hole is used for rotatably cooperating with the rotating shaft.

4. The breaker magnetic structure according to claim 3, wherein The second channel has a first end and a second end arranged oppositely, the first end being communicated with the first channel; the vertical distance between the first end and the top surface of the yoke is greater than the vertical distance between the second end and the top surface of the yoke.

5. The magnetic structure of the circuit breaker according to claim 3 or 4, characterized in that, A mating surface is arranged on one side of the rotating shaft away from the triggering end, and an angle γ is formed between the mating surface and the bottom surface of the armature, 20°≤γ≤40°; The connection position between the limiting hole and the second channel includes a first connection line and a second connection line, and the surface of the second channel close to the bottom plate is tangent to the limiting hole at the position of the second connection line; During the process of the rotating shaft entering the limiting hole through the second channel, the surface of the second channel close to the bottom plate fits with the mating surface.

6. The magnetic structure of the circuit breaker according to claim 5, characterized in that, The diameter of the rotating shaft is d, the limiting hole has a diameter D, D≥d; the vertical distance from the axis of the rotating shaft to the mating surface is L; the vertical distance between the first connection line and the second connection line is b, b≥L + d / 2.

7. The magnetic structure of the circuit breaker according to claim 6, wherein d / 2 - L≤d / 3.

8. The magnetic structure of the circuit breaker according to claim 1, characterized in that The yoke is of an integral structure; and / or, the armature is of an integral structure.

9. A tripping mechanism, characterized in that, Comprising: The circuit breaker magnetic structure according to any one of claims 1 to 8; A static contact arranged on the circuit breaker magnetic structure; An operating mechanism including a moving contact for cooperating with the static contact; the operating mechanism is arranged on the rotation path of the armature included in the circuit breaker magnetic structure; when the triggering end of the armature rotates towards the direction close to the yoke included in the circuit breaker magnetic structure, the triggering end triggers the operating mechanism to separate the static contact and the moving contact.

10. A circuit breaker, characterized in that, Comprising: A housing having an accommodation cavity; a limiting portion is arranged in the housing; The trip mechanism according to claim 9 is disposed in the accommodation cavity; the limiting portion is used to limit the position of the trigger end of the armature included in the trip mechanism.

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