Tripping assembly and circuit breaker

Abstract

The utility model discloses a tripping assembly and a circuit breaker, and relates to the technical field of low-voltage electric appliances, and the tripping assembly comprises a conductive plate and a magnet yoke. The conductive plate comprises a wiring part, a conductive part and a static contact part which are integrally arranged. The magnet yoke is provided with an assembling groove, and an arc striking angle is integrally arranged on the magnet yoke. The conductive plate is fixedly connected with the magnet yoke, the conductive part is partially located in the assembling groove, and the static contact part is connected with the arc striking angle. According to the tripping assembly and the circuit breaker provided by the invention, the structure of the tripping assembly can be simplified, and assembling of the tripping assembly and cooperation among the structures are facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to a trip assembly and a circuit breaker. Background Art

[0002] The electromagnetic releases used in low-voltage circuit breakers generally include direct-acting electromagnetic releases and snap-on electromagnetic releases, and their functions are roughly the same. When a short circuit occurs in the circuit, the current passing through the circuit breaker increases sharply in an instant. The electromagnetic release can respond quickly and cause the circuit breaker to trip quickly, thereby providing short-circuit protection and instantaneous high current protection.

[0003] The existing snap-on electromagnetic release generally includes components such as a yoke, an armature, a conductive part and an elastic part, which are interconnected to realize the electromagnetic release function. However, the existing electromagnetic release has a large number of parts and is complex to assemble, which is not conducive to the coordination between the components.

[0004] Therefore, it is urgent to propose an electromagnetic release to solve the problems existing in the prior art. Utility Model Content

[0005] The purpose of the present application is to provide a trip assembly and a circuit breaker, which can simplify the structure of the trip assembly and facilitate assembly and coordination between various structures.

[0006] In a first aspect, an embodiment of the present application provides a trip assembly, the trip assembly comprising a conductive plate and a yoke. The conductive plate comprises a wiring portion, a conductive portion and a static contact portion which are integrally arranged. The yoke has an assembly groove, and an arc striking angle is integrally arranged on the yoke. The conductive plate is fixedly connected to the yoke, the conductive portion is partially in the assembly groove, and the static contact portion is connected to the arc striking angle.

[0007] Based on the above-mentioned embodiments of the present application, by setting the magnetic yoke and the arc-starting angle as an integrated structure, and setting the conductive plate as an integrated structure, it is beneficial to reduce the number of parts of the trip assembly and facilitate the assembly of the trip assembly. In addition, the arc-starting angle integrally provided with the magnetic yoke is connected to the static contact portion of the conductive plate, so that the arc generated on the static contact portion can be smoothly transferred to the arc-starting angle, and then directly transferred to the magnetic yoke along the arc-starting angle, which can reduce the risk of the static contact portion being burned by the arc and the arc leakage, and improve the safety of the circuit breaker.

[0008] In some examples, the arc striking angle is set on a side of the magnetic yoke close to the stationary contact portion, and the arc striking angle includes an arc striking section and a fixed section. The arc striking section is bent toward the direction of the magnetic yoke away from the conductive plate, and the end of the arc striking section away from the magnetic yoke is folded toward the stationary contact portion. The fixed section is set at the end of the arc striking section away from the magnetic yoke, and the fixed section is fixedly connected to the conductive plate.

[0009] Based on the above-mentioned embodiments of the present application, the setting of the arc-starting section can connect the static contact part and the magnetic yoke, so that the arc on the static contact part moves to the magnetic yoke, and the arc-starting section is bent in the direction of the magnetic yoke away from the conductive plate, which can stretch the arc while facilitating the reception of the arc, so that the arc can quickly move to the magnetic yoke, which is beneficial to reduce the damage of the arc to the static contact part. The setting of the fixed section can realize the fixed connection between the arc-starting angle and the conductive plate, so that the position of the arc-starting angle and the static contact part remains relatively fixed and tightly connected, so that the generated arc can smoothly move from the static contact part to the arc-starting angle, which is beneficial to reduce the risk of arc diffusion.

[0010] In some examples, a portion of the arc striking segment close to the stationary contact portion is provided with a docking portion, and the stationary contact portion is connected to the docking portion.

[0011] Based on the above-mentioned embodiments of the present application, the setting of the docking part can improve the matching stability between the arc striking section and the static contact part, as well as improve the contact tightness between the arc striking section and the static contact part, which is conducive to the smooth movement of the arc from the static contact part to the arc striking section, and avoids the influence of the gap between the static contact part and the arc striking section on the arc movement.

[0012] In some examples, the static contact portion is folded relative to the conductive portion, the static contact portion and the conductive portion are arranged at an angle, and a static contact point is arranged on the static contact portion. At least one first connecting portion is arranged on a portion of the conductive portion close to the static contact portion, and a second connecting portion is arranged on the fixed section, and the first connecting portion is connected to the second connecting portion.

[0013] Based on the above-mentioned embodiments of the present application, the arc striking angle is fixedly connected to the conductive part through the fixed section, which can avoid affecting the coordination between the static contact part and the moving contact while ensuring the fixed connection between the arc striking angle and the conductive plate.

[0014] In some examples, the yoke includes a base plate and a first magnetic conductive plate and a second magnetic conductive plate spaced apart on the base plate, and the first magnetic conductive plate, the second magnetic conductive plate and the base plate enclose an assembly groove. The trip assembly also includes an armature and an elastic member. The armature is rotatably connected to the first magnetic conductive plate and the second magnetic conductive plate, and the armature has an open position and a snap-on position, and can switch between the open position and the snap-on position. One end of the elastic member is connected to the yoke, and the other end is connected to the armature, and the elastic member can maintain the armature in the open position.

[0015] Based on the above-mentioned embodiments of the present application, the release assembly composed of the armature, the elastic member, the yoke and the conductive plate has a small number of parts and is easy to assemble. The armature is rotatably connected to the yoke, and the magnetic field generated on the yoke can directly act on the armature. The elastic member is connected between the armature and the yoke, and can also directly act on the armature and produce an effect opposite to that of the yoke. This arrangement has the characteristics of simple structure and stable coordination.

[0016] In some examples, rotation connection holes are provided on the first magnetic conductive plate, and rotation limiting grooves are provided on the second magnetic conductive plate. A rotation post is provided on the armature, the rotation post is rotatably connected to the rotation connection hole, a part of the armature is inserted into the rotation limiting groove, and the two opposite groove walls of the rotation limiting groove are arranged at an angle, and the rotation limiting groove can limit the rotation angle of the armature.

[0017] Based on the above embodiments of the present application, the cooperation between the rotation connection hole and the rotation post can rotatably connect the armature to the yoke, and the setting of the rotation limiting groove can limit the rotation range of the armature. Among them, only one rotation post is provided on the armature to cooperate with the rotation connection hole to realize the rotation of the armature, and the other side of the armature is directly inserted into the rotation limiting groove, and the rotation range of the armature is limited by the abutment of the groove wall of the rotation limiting groove and the side wall of the armature. In this way, while realizing the rotation connection, it can also play a limiting role, with a simple structure, strong functionality, and convenient assembly of the armature to the yoke.

[0018] In some examples, both the first magnetic conductive plate and the second magnetic conductive plate are provided with rotation connection holes, rotation posts are provided on both sides of the armature, and the two rotation posts are rotatably connected to the corresponding rotation connection holes. A limiting structure is provided on the yoke or the armature, and the limiting structure can limit the rotation angle of the armature.

[0019] Based on the above embodiments of the present application, the form of corresponding rotation connection between two rotation posts and two rotation connection holes is adopted. Compared with the previous embodiments, this embodiment is more conducive to the relative rotation between the armature and the yoke, so that when the yoke adsorbs the armature, the armature can rotate more smoothly from the open position to the clapping position. In addition, a separate limiting structure is provided to limit the rotation range of the armature, which can reduce the influence on the rotation process of the armature and improve the reliability of the rotation cooperation between the armature and the yoke.

[0020] In some examples, both the first magnetic conductive plate and the second magnetic conductive plate are provided with rotation connection holes, a rotating shaft is provided on the rotation connection hole, a plugging through hole is provided on the armature, and the armature is rotatably connected to the rotating shaft through the plugging through hole. A limiting structure is provided on the yoke or the armature, and the limiting structure can limit the rotation angle of the armature.

[0021] Based on the above embodiments of the present application, the rotation cooperation form of providing a rotating shaft on the yoke and rotatably connecting the armature to the rotating shaft can reduce the influence of dust or debris worn by the armature on the rotation connection during long-term use of the tripping assembly, improve the stability of the rotational connection of the armature, and the structure of this connection method is relatively simple and the assembly is more convenient, with high practicability.

[0022] In some examples, the elastic member is a tension spring, a first assembly column is provided on the yoke, a second assembly column is provided on the armature, a first end of the elastic member is connected to the first assembly column, and a second end of the elastic member is connected to the second assembly column, or the elastic member is a torsion spring, and the torsion spring is sleeved on the rotating column.

[0023] Based on the above-mentioned embodiments of the present application, a tension spring is provided to apply a pulling force to the side of the armature away from the yoke, so that the armature can be maintained in the open position when the trip assembly is in a normal state. When the magnetic field force applied by the yoke to the armature is greater than the pulling force of the tension spring, the armature rotates to the snap-on position. This can ensure the normal operation of the trip assembly, prevent the armature from shaking or rotating at will, causing it to rotate to the snap-on position prematurely, and improve the accuracy of the operation of the trip assembly.

[0024] In a second aspect, an embodiment of the present application further provides a circuit breaker, comprising a housing and the above-mentioned trip assembly, wherein the trip assembly is mounted on the housing.

[0025] Based on the above-mentioned embodiments of the present application, the circuit breaker with the above-mentioned trip assembly simplifies the structure of the trip assembly and reduces the number of parts, thereby simplifying the assembly operation of the trip assembly, effectively improving the assembly efficiency of the trip assembly on the circuit breaker, and further facilitating improving the overall assembly efficiency of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the overall structure of the trip assembly provided in an embodiment of the present application.

[0028] Figure 2 Another view of the overall structural schematic diagram of the trip assembly provided in an embodiment of the present application.

[0029] Figure 3 An exploded view of a trip assembly provided in an embodiment of the present application.

[0030] Figure 4 A schematic diagram of the structure of a magnetic yoke provided in an embodiment of the present application.

[0031] Figure 5 A schematic structural diagram of another embodiment of the magnetic yoke provided in the embodiment of the present application.

[0032] Figure 6This is a schematic structural diagram of the trip assembly provided by an embodiment of the present application installed in a circuit breaker housing.

[0033] Explanation of reference numerals:

[0034] 100, trip assembly; 200, circuit breaker; 201, housing; 1, conductive plate; 11, wiring part; 12, conductive part; 121, first connection part; 13, static contact part; 131, static contact point; 2, yoke; 21, assembly groove; 22, arc guide angle; 221, arc guide section; 2211, docking part; 222, fixed section; 2221, second connection part; 23, first magnetic conductive plate; 231, rotation connection hole; 24, second magnetic conductive plate; 241, rotation limit groove; 25, first assembly post; 251, first hanging groove; 3, armature; 31, rotation post; 32, second assembly post; 321, second hanging groove; 4, elastic member. Detailed implementation manners

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application claimed, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0037] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0038] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship when the product of this application is usually placed. It is only for the convenience of describing the present 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 should not be construed as a limitation of the present application. In addition, terms such as "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present application, it should also be noted that unless otherwise clearly specified and defined, the terms "arrangement" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. 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.

[0040] A clapper - type electromagnetic release is usually arranged in a low - voltage circuit breaker. The clapper - type electromagnetic release generally includes components such as an armature, a yoke, and an elastic member. The conductive member in the circuit breaker can utilize the current to generate a magnetic field in the yoke through the yoke. When a short - circuit fault occurs in the circuit where the circuit breaker is located, the current passing through the circuit breaker instantaneously increases, and the magnetic field generated on the yoke correspondingly increases. The magnetic field adsorbs the armature to act, thereby realizing the automatic disconnection of the circuit breaker.

[0041] However, the existing structure of the clapper - type electromagnetic release is relatively complex and inconvenient for assembly, resulting in poor cooperation stability among the components in the electromagnetic release, and it is not conducive to the cooperation between the electromagnetic release and other components in the circuit breaker. For example, in the cooperation between the yoke and the conductive member, one end of the conductive member is provided with a static contact, and an arc - guiding angle is also provided on the static contact. The arc - guiding angle can guide the arc on the static contact to the arc - extinguishing chamber located below the yoke. However, due to the gap between the arc - guiding angle and the yoke, there may be a situation of leakage of the arc during the arc - guiding process, which is not conducive to the safe use of the circuit breaker.

[0042] Based on this, the embodiments of the present application provide a tripping assembly and a circuit breaker, which can simplify the structure of the tripping assembly and are conducive to the assembly and the cooperation between various structures.

[0043] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0044] Please refer to Figures 1 to 3 , this embodiment provides a tripping assembly 100. The tripping assembly 100 includes a conductive plate 1 and a yoke 2. The conductive plate 1 includes a wiring portion 11, a conductive portion 12, and a static contact portion 13 which are integrally arranged. The yoke 2 has an assembly groove 21, and an arc - guiding angle 22 is integrally arranged on the yoke 2. The conductive plate 1 is fixedly connected to the yoke 2, a part of the conductive portion 12 is located in the assembly groove 21, and the static contact portion 13 is connected to the arc - guiding angle 22.

[0045] Based on the above - mentioned embodiment of the present application, by setting the yoke 2 and the arc - guiding angle 22 as an integral structure, and setting the conductive plate 1 as an integral structure, it is beneficial to reduce the number of parts of the tripping assembly 100 and facilitate the assembly of the tripping assembly 100.

[0046] Moreover, the arc starting angle 22 integrally provided with the yoke 2 is connected to the static contact portion 13 of the conductive plate 1, so that the arc generated on the static contact portion 13 can be smoothly transferred to the arc starting angle 22 and then directly transferred to the yoke 2 along the arc starting angle 22. This can reduce the risk of the static contact portion 13 being damaged by the arc and leakage of the arc, and improve the safety of use of the circuit breaker 200.

[0047] Specifically, the arc starting angle 22 is connected to the static contact portion 13, and the specific connection form can be welding, riveting or abutting, etc., all of which can meet the tight connection between the arc starting angle 22 and the static contact portion 13. This can enable the arc generated on the static contact portion 13 to move smoothly to the arc starting angle 22 and prevent the arc from leaking out through the gap between the static contact portion 13 and the arc starting angle 22 and damaging other components inside the circuit breaker 200.

[0048] Refer to Figure 1 and Figure 2 , the arc starting angle 22 is integrally provided on the yoke 2, so that the arc can directly move along the arc starting angle 22 to the yoke 2. Since the yoke 2 is arranged close to the arc extinguishing chamber in the circuit breaker 200, the arc moving to the yoke 2 can directly enter the arc extinguishing chamber with the cooperation of the yoke 2, effectively improving the arc extinguishing effect.

[0049] Compared with the setting form in which the arc starting angle 22 is arranged on the static contact portion 13 and extends in the direction of the arc extinguishing chamber, this embodiment can reduce the occurrence of arc leakage during the movement of the arc to the arc extinguishing chamber, ensure that the arc generated on the static contact portion 13 can completely enter the arc extinguishing chamber, and reduce the risk caused by arc diffusion.

[0050] In addition, refer to Figure 3 , the conductive plate 1 is mainly used for conducting electricity in the circuit breaker 200. The conductive plate 1 is arranged in a long strip plate structure. The wiring portion 11 is located at the first end of the conductive plate 1. The wiring portion 11 can be combined with the wiring frame in the circuit breaker 200 to form a wiring terminal, and the wiring terminal is connected to an external wire to realize the function of accessing current.

[0051] The conductive portion 12 is located in the middle of the conductive plate 1. The conductive portion 12 is connected between the wiring portion 11 and the static contact portion 13 and plays a role in guiding the current. The static contact portion 13 is located at the second end of the conductive plate 1. The static contact portion 13 can contact or separate from the moving contact in the circuit breaker 200 to realize the conduction or disconnection of the circuit breaker 200.

[0052] Refer to Figure 3The yoke 2 in the trip assembly 100 is used to guide and concentrate the magnetic field, so that the armature 3 in the trip assembly 100 can be driven to move under the action of the magnetic field force to achieve the rapid automatic disconnection of the circuit breaker 200. Specifically, the yoke 2 is provided with an assembly groove 21, the conductive plate 1 is arranged close to the yoke 2, and the conductive part 12 on the conductive plate 1 is partially in the assembly groove 21. When the circuit breaker 200 is in the on state, current flows through the conductive plate 1. When the current flows through the conductive part 12 in the assembly groove 21, the magnetic effect of the current will act on the yoke 2 to form a magnetic field on the yoke 2.

[0053] When a short circuit occurs in the circuit, the current passing through the conductive plate 1 increases instantaneously, and the magnetic field generated on the yoke 2 increases immediately. Accordingly, the magnetic attraction exerted by the yoke 2 on the armature 3 increases, and the armature 3 moves to disconnect the circuit breaker 200.

[0054] Reference Figure 4 In some examples, the arc-starting angle 22 is arranged on a side of the yoke 2 close to the stationary contact portion 13, and the arc-starting angle 22 includes an arc-starting section 221 and a fixed section 222. The arc-starting section 221 is bent toward the direction of the yoke 2 away from the conductive plate 1, and the end of the arc-starting section 221 away from the yoke 2 is folded toward the stationary contact portion 13. The fixed section 222 is arranged at the end of the arc-starting section 221 away from the yoke 2, and the fixed section 222 is fixedly connected to the conductive plate 1.

[0055] Based on the above-mentioned embodiments of the present application, the setting of the arc-starting section 221 can connect the stationary contact part 13 and the yoke 2, so that the arc on the stationary contact part 13 moves to the yoke 2, and the arc-starting section 221 is bent in the direction of the yoke 2 away from the conductive plate 1, which can stretch the arc while facilitating the reception of the arc, so that the arc can quickly move to the yoke 2, which is beneficial to reduce the damage of the arc to the stationary contact part 13. The setting of the fixed section 222 can realize the fixed connection between the arc-starting angle 22 and the conductive plate 1, so that the position of the arc-starting angle 22 and the stationary contact part 13 remains relatively fixed and tightly connected, so that the generated arc can smoothly move from the stationary contact part 13 to the arc-starting angle 22, which is beneficial to reduce the risk of arc diffusion.

[0056] The arc striking angle 22 is arranged on the side of the yoke 2 close to the static contact portion 13 to shorten the distance of arc movement, so that the arc can quickly enter the arc extinguishing chamber with the cooperation of the yoke 2, thereby improving the arc extinguishing efficiency.

[0057] Reference Figure 4, the arc ignition section 221 is bent towards the direction away from the conductive plate 1 of the yoke 2, and the end of the arc ignition section 221 away from the yoke 2 is folded towards the direction where the static contact part 13 is located, so that the arc ignition section 221 forms a structure similar to a V shape. The left end of the V-shaped arc ignition section 221 is connected to the yoke 2, and the right half of the V-shaped arc ignition section 221 is close to the static contact part 13 and is in close contact with the static contact part 13. Such a setting of the arc ignition section 221 not only helps the arc ignition section 221 to receive the electric arc from the static contact part 13, but also can elongate the electric arc during the movement of the electric arc, so that the electric arc quickly moves to the yoke 2, effectively improving the arc extinguishing efficiency.

[0058] The fixed section 222 is arranged at the end of the arc ignition section 221 away from the yoke 2. The fixed section 222 is used for fixedly connecting the arc ignition angle 22 and the conductive plate 1, which is beneficial to improving the connection stability between the arc ignition angle 22 and the static contact part 13, thereby improving the accuracy of arc transfer. The fixed section 222 can be directly connected to the static contact part 13 or connected to the conductive part 12, and both connection positions can meet the fixed connection between the arc ignition angle 22 and the conductive plate 1.

[0059] Refer to Figure 4 , in some examples, a docking part 2211 is arranged on the part of the arc ignition section 221 close to the static contact part 13, and the static contact part 13 is connected to the docking part 2211.

[0060] Based on the above embodiments of the present application, the setting of the docking part 2211 can improve the cooperation stability between the arc ignition section 221 and the static contact part 13, and improve the contact tightness between the arc ignition section 221 and the static contact part 13, which is beneficial to the smooth movement of the electric arc from the static contact part 13 to the arc ignition section 221, and avoids affecting the movement of the electric arc due to the gap between the static contact part 13 and the arc ignition section 221.

[0061] Specifically, the position of the arc ignition part close to the static contact part 13 has an offset part, and the groove formed between the offset part of the arc ignition part and the non-offset part of the arc ignition part is the docking part 2211. The thickness of the static contact part 13 can be the same as the depth of the groove forming the docking part 2211. After the static contact part 13 is assembled to the docking part 2211, the side of the static contact part 13 facing the yoke 2 abuts against the offset part of the arc ignition part, and the end of the static contact part 13 away from the conductive part 12 abuts against the non-offset part of the arc ignition part. On the one hand, this improves the connection stability between the arc ignition angle 22 and the static contact part 13, and on the other hand, it facilitates the smooth movement of the electric arc from the end of the static contact part 13 to the arc ignition section 221, avoiding affecting the transfer of the electric arc due to the assembly position deviation, and improving the transfer efficiency and accuracy of the electric arc.

[0062] Refer to Figure 3, in some examples, the static contact portion 13 is folded relative to the conductive portion 12, the static contact portion 13 and the conductive portion 12 are arranged at an angle, and a static contact point 131 is provided on the static contact portion 13. At least one first connection portion 121 is provided on the portion of the conductive portion 12 close to the static contact portion 13, a second connection portion 2221 is provided on the fixed section 222, and the first connection portion 121 is connected to the second connection portion 2221.

[0063] The static contact portion 13 and the conductive portion 12 are arranged at an angle, that is, the static contact portion 13 is bent relative to the conductive portion 12 to different directions so that the static contact portion 13 can cooperate with the moving contact in the circuit breaker 200. Among them, the static contact point 131 provided on the static contact portion 13 is used to specifically contact the moving contact.

[0064] Based on the above embodiments of the present application, the arcing angle 22 is fixedly connected to the conductive portion 12 through the fixed section 222, which can avoid affecting the cooperation between the static contact portion 13 and the moving contact while satisfying the fixed connection between the arcing angle 22 and the conductive plate 1.

[0065] In the embodiment of the present application, the first connection portion 121 is set as a welding hole, and the second connection portion 2221 is set as a welding post. The welding post can be correspondingly inserted into the welding hole so as to realize the connection between the conductive portion 12 and the fixed section 222 by welding. The welding connection method has the characteristics of simple connection form, convenient operation and high connection stability. Moreover, the setting of the welding hole can reduce the influence of the welding connection on the volumes of the conductive portion 12 and the fixed section 222, and avoid affecting the contact tightness between the arcing portion and the static contact portion 13 due to the solder joints between the conductive portion 12 and the fixed section 222, making the structure of the trip assembly 100 more compact.

[0066] Of course, the connection between the first connection portion 121 and the second connection portion 2221 can also be set as a snap connection, a fastener connection or other connection forms, as long as the conductive portion 12 and the fixed end 222 can be stably connected.

[0067] Refer to Figure 4 , in some examples, the yoke 2 includes a bottom plate and a first magnetic conductive plate 23 and a second magnetic conductive plate 24 spaced on the bottom plate. The first magnetic conductive plate 23, the second magnetic conductive plate 24 and the bottom plate enclose an assembly groove 21. The trip assembly 100 further includes an armature 3 and an elastic member 4. The armature 3 is rotatably connected to the first magnetic conductive plate 23 and the second magnetic conductive plate 24. The armature 3 has an open position and a clapping position and can switch between the open position and the clapping position. One end of the elastic member 4 is connected to the yoke 2, and the other end is connected to the armature 3. The elastic member 4 can maintain the armature 3 in the open position.

[0068] The first magnetic conduction plate 23 and the second magnetic conduction plate 24 are arranged at intervals on the bottom plate. The first magnetic conduction plate 23 and the second magnetic conduction plate 24 are arranged opposite to each other and have the same extension direction and size. The first magnetic conduction plate 23, the second magnetic conduction plate 24 and the bottom plate jointly enclose an assembly groove 21. The conductive part 12 of the conductive plate 1 is installed in the assembly groove 21. When there is current passing through the conductive plate 1, the current flows through the conductive part 12 and forms a magnetic field between the first magnetic conduction plate 23 and the second magnetic conduction plate 24, so that the magnetic yoke 2 can provide electromagnetic force to drive the armature 3 in the trip assembly 100 to act, realizing the trip function of the trip assembly 100.

[0069] Based on the above embodiments of the present application, the trip assembly 100 composed of the armature 3, the elastic member 4, the magnetic yoke 2 and the conductive plate 1 has few parts and is convenient for assembly. Among them, the armature 3 is rotatably connected to the magnetic yoke 2. The magnetic field generated on the magnetic yoke 2 can directly act on the armature 3. The elastic member 4 is connected between the armature 3 and the magnetic yoke 2 and can also directly act on the armature 3 and produce an effect opposite to that of the magnetic yoke 2. This setting form has the characteristics of simple structure and stable cooperation.

[0070] Specifically, referring to Figure 1 and Figure 2 , the armature 3 is rotatably connected to the first magnetic conduction plate 23 and the second magnetic conduction plate 24. The opening position of the armature 3 relative to the magnetic yoke 2, that is, the position where the armature 3 rotates away from the bottom plate. Conversely, the clapping position of the armature 3 relative to the magnetic yoke 2, that is, the position where the armature 3 rotates close to the bottom plate. When the circuit breaker 200 is in the off state, there is no current passing through the conductive plate 1, and the armature 3 is in the opening position relative to the magnetic yoke 2. When there is current passing through the conductive plate 1, the electromagnetic force generated on the magnetic yoke 2 increases, and can generate an adsorption effect on the armature 3 to make the armature 3 rotate to the clapping position.

[0071] One end of the elastic member 4 is connected to the magnetic yoke 2 at a position close to the rotatable connection part of the armature 3, and the other end is connected to the armature 3 at a position far from the rotatable connection part with the magnetic yoke 2. In this way, the armature 3 can be maintained in the opening position by the pulling force of the elastic member 4, ensuring that the armature 3 is always in the opening position when the circuit breaker 200 is in the off state.

[0072] After the circuit breaker 200 is connected, normal current passes through the conductive plate 1, and the electromagnetic force generated on the magnetic yoke 2 is less than the pulling force of the elastic member 4. At this time, the magnetic yoke 2 cannot adsorb the armature 3 to make the armature 3 rotate. When the current passing through the conductive plate 1 suddenly increases, the electromagnetic force generated by the magnetic yoke 2 is greater than the pulling force of the elastic member 4. At this time, the magnetic yoke 2 adsorbs the armature 3 to make the armature 3 rotate to the clapping position, thereby realizing the function of the trip assembly 100 and making the circuit breaker 200 trip.

[0073] Referring to Figure 1 , Figure 2 and Figure 4, in some examples, a rotation connection hole 231 is provided on the first magnetic conductive plate 23, and a rotation limit groove 241 is provided on the second magnetic conductive plate 24. A rotation post 31 is provided on the armature 3, the rotation post 31 is rotationally connected to the rotation connection hole 231, a part of the armature 3 is inserted into the rotation limit groove 241, and the two groove walls of the rotation limit groove 241 opposite to each other are arranged at an angle, and the rotation limit groove 241 can limit the rotation range of the armature 3.

[0074] Based on the above embodiments of the present application, the cooperation between the rotation connection hole 231 and the rotation post 31 can rotatably connect the armature 3 to the magnetic yoke 2, and the setting of the rotation limit groove 241 can limit the rotation range of the armature 3. Among them, only one rotation post 31 is provided on the armature 3 to cooperate with the rotation connection hole 231 to realize the rotation of the armature 3, and the other side of the armature 3 is directly inserted into the rotation limit groove 241, and the rotation range of the armature 3 is limited by the abutment of the groove wall of the rotation limit groove 241 and the side wall of the armature 3. In this way, while realizing the rotation connection, it can also play a limiting role, with a simple structure, strong functionality, and facilitating the assembly of the armature 3 to the magnetic yoke 2.

[0075] Specifically, referring to Figure 4 , the rotation connection hole 231 is provided on the first magnetic conductive plate 23, the rotation limit groove 241 is provided on the second magnetic conductive plate 24, the positions of the rotation connection hole 231 and the rotation limit groove 241 are opposite, only one side of the armature 3 is provided with a rotation post 31, the side provided with the rotation post 31 is rotationally connected to the rotation connection hole 231, and the other side of the armature 3 is directly inserted into the rotation limit groove 241. During the rotation of the armature 3, the rotation post 31 rotates in the rotation connection hole 231, and the other side of the armature 3 can limit the rotation range of the armature 3 by abutting against the groove wall of the rotation limit groove 241 in the rotation limit groove 241, preventing the armature 3 from rotating too far away from the magnetic yoke 2 and causing the situation that the magnetic yoke 2 cannot adsorb the armature 3.

[0076] Among them, referring to Figure 4 , the included angle between the two groove walls of the rotation limit groove 241 is set to an acute angle, and the specific included angle can be adjusted according to the cooperation between the armature 3 and the magnetic yoke 2. Exemplarily, the included angle can be 15°, 30° or 45°, etc. In this way, the rotatable angle of the armature 3 is limited to 15°, 30° or 45°, etc., that is, taking the clapping position of the armature 3 on the magnetic yoke 2 as a reference, the armature 3 can rotate 15°, 30° or 45° relative to the clapping position.

[0077] Restricting the rotation of the armature 3 within a small angular range is beneficial for the yoke 2 to adsorb the armature 3 in time. When the current passing through the conductive plate 1 suddenly increases, the magnetic field generated on the yoke 2 can act on the armature 3 in time and cause the armature 3 to rotate from the open position to the clapper position, avoiding the influence of the excessive distance between the armature 3 and the yoke 2 on the adsorption of the yoke 2 to the armature 3. Of course, the larger the rotatable angle of the armature 3, the greater the electromagnetic force required to rotate to the clapper position, which can correspond to circuit breakers 200 of different specifications and has strong applicability.

[0078] In the embodiment of the present application, referring to Figure 3 , the rotating column 31 is set as a quadrangular prism, and the rotating connection hole 231 is set as a circular hole. The diameter of the circumscribed circle of the quadrangular prism matches the diameter of the rotating connection hole 231, so that the quadrangular prism can also rotate smoothly in the rotating connection hole 231. The reason for setting the rotating column 31 as a quadrangular prism is that the armature 3 has a plate-like structure, and the quadrangular prism can be formed by punching during the processing and manufacturing process, which is simpler than setting it as a cylindrical form and is convenient for processing and forming. Of course, the rotating column 31 can also be set as a cylinder or other styles of prisms as long as the rotation condition is satisfied.

[0079] Exemplarily, referring to Figure 5 , both the first magnetic conductive plate 23 and the second magnetic conductive plate 24 are provided with rotating connection holes 231, and both sides of the armature 3 are provided with rotating columns 31. The two rotating columns 31 are rotatably connected to the corresponding rotating connection holes 231. A limiting structure (not shown in the figure) is provided on the yoke 2 or the armature 3, and the limiting structure can limit the rotation angle range of the armature 3.

[0080] Based on the above embodiment of the present application, adopting the form of corresponding rotational connection between two rotating columns 31 and two rotating connection holes 231 is more beneficial for the relative rotation between the armature 3 and the yoke 2 compared with the previous embodiment. During the process of the yoke 2 adsorbing the armature 3, the armature 3 can rotate more smoothly from the open position to the clapper position. In addition, a separate limiting structure is provided to limit the rotation range of the armature 3, which can reduce the influence on the rotation process of the armature 3 and improve the reliability of the rotational cooperation between the armature 3 and the yoke 2.

[0081] Specifically, both the first magnetic conductive plate 23 and the second magnetic conductive plate 24 are provided with rotating connection holes 231 and are located at opposite positions. Rotating connection columns are provided on both sides of the armature 3. The armature 3 is installed between the first magnetic conductive plate 23 and the second magnetic conductive plate 24, and the rotating connection columns on both sides of the armature 3 are correspondingly rotatably connected in the rotating connection holes 231, so that both sides of the armature 3 maintain a stable rotational cooperation with the yoke 2.

[0082] This arrangement requires a separate limit structure, which can be arranged on the yoke 2 or on the armature 3. Exemplarily, an extension arm is arranged on the side of the first magnetic conductive plate 23 away from the conductive portion 12, and the extension arm extends from the first magnetic conductive plate 23 to the direction where the second magnetic conductive plate 24 is located, that is, the extension arm extends between the first magnetic conductive plate 23 and the second magnetic conductive plate 24, so that during the rotation of the armature 3, the armature 3 can abut against the side of the armature 3 away from the conductive portion 12, thereby limiting the rotation of the armature 3.

[0083] For example, refer to Figure 5 The first magnetic conductive plate 23 and the second magnetic conductive plate 24 are both provided with a rotation connection hole 231, a rotating shaft (not shown in the figure) is arranged on the rotation connection hole 231, and a plug-in through hole (not shown in the figure) is arranged on the armature 3, and the armature 3 is rotatably connected to the rotating shaft through the plug-in through hole. A limiting structure is arranged on the yoke 2 or the armature 3, and the limiting structure can limit the rotation angle range of the armature 3.

[0084] Based on the above-mentioned embodiments of the present application, a rotational matching form in which a rotating shaft is arranged on the yoke 2 and the armature 3 is rotationally connected to the rotating shaft is adopted. This can reduce the influence of dust or debris caused by wear of the armature 3 on the rotational connection of the trip assembly 100 during long-term use, improve the stability of the rotational connection of the armature 3, and this connection method has a simple structure, is convenient to assemble, and has high practicality.

[0085] Specifically, the rotation connection holes 231 on the first magnetic conductive plate 23 and the second magnetic conductive plate 24 correspond to each other, and the two ends of the rotating shaft are correspondingly inserted in the two rotation connection holes 231, and the rotating shaft part is located between the first magnetic conductive plate 23 and the second magnetic conductive plate 24. Ears are provided on the two sides of the armature 3 corresponding to the first magnetic conductive plate 23 and the second magnetic conductive plate 24, and the plug-in through holes can be provided on the ears, and the armature 3 is rotatably connected to the rotating shaft through the plug-in through holes on the ears.

[0086] Compared with the situation in which the armature 3 is directly connected to the first magnetic conductive plate 23 and the second magnetic conductive plate 24 in the aforementioned embodiment, the present embodiment enables the armature 3 to rotate more smoothly, reducing the direct influence of the current passing through the conductive plate 1 on the armature 3. On the other hand, it can reduce the influence of debris such as dust or rotating wear on the normal rotation of the armature 3, improve the reliability of the rotation of the armature 3 relative to the yoke 2, and ensure that the armature 3 can rotate from the open position to the closed position in time. Similar to the aforementioned embodiment, this setting form also requires the setting of a separate limit structure. The specific structure can refer to the aforementioned content and will not be repeated here.

[0087] Reference Figures 1 to 3, in some examples, the elastic member 4 is a tension spring. A first assembly post 25 is provided on the yoke 2, and a second assembly post 32 is provided on the armature 3. The first end of the elastic member 4 is connected to the first assembly post 25, and the second end of the elastic member 4 is connected to the second assembly post 32.

[0088] The first assembly post 25 is a column extending from the second magnetic conductive plate 24. The second assembly post 32 is a column provided on the side of the armature 3 facing away from the yoke 2. In this application, the elastic member 4 is set as a tension spring. The first end of the tension spring is connected to the first assembly post 25, and the second end is connected to the second assembly post 32, thereby applying a pulling force to the armature 3, so that the armature 3 has a tendency to rotate in a direction away from the yoke 2.

[0089] When a normal current passes through the conductive plate 1, the magnetic field force exerted on the armature 3 by the magnetic field generated on the yoke 2 is less than the pulling force of the tension spring on the armature 3, that is, the armature 3 will not rotate towards the closing position. When the current passing through the conductive plate 1 suddenly increases, the magnetic field force exerted on the armature 3 by the yoke 2 is greater than the pulling force of the tension spring, and immediately causes the armature 3 to rotate towards the closing position.

[0090] Among them, a first hanging groove 251 is provided on the first assembly post 25. The first end of the tension spring can be hooked or sleeved in the first hanging groove 251, which can play a role in fixing the first end of the tension spring while bearing the pulling force of the tension spring, preventing the tension spring from loosening or falling off, and improving the connection stability of the tension spring. A second hanging groove 321 is provided on the second assembly post 32. The column can bear the pulling force of the tension spring, and the second hanging groove 321 is used to fix the second end of the tension spring, which has the same technical effect as the aforementioned first assembly post 25 and will not be elaborated here.

[0091] Based on the above embodiments of the present application, by setting a tension spring to apply a pulling force to the side of the armature 3 facing away from the yoke 2, the armature 3 can be kept in the open position when the tripping assembly 100 is in the normal state. When the magnetic field force exerted on the armature 3 by the yoke 2 is greater than the pulling force of the tension spring, the armature 3 rotates to the closing position. This can ensure the normal operation of the tripping assembly 100, prevent the armature 3 from shaking or rotating randomly and causing it to rotate to the closing position in advance, and improve the working accuracy of the tripping assembly 100.

[0092] Exemplarily, the elastic member 4 can also be set as a torsion spring. The torsion spring can be sleeved on the rotating column 31 or the rotating shaft. The torsion spring usually has a first torsion arm and a second torsion arm. The first torsion arm abuts against the armature 3, and the second torsion arm abuts against the yoke 2. In this way, an elastic force can also be applied to the armature 3 to prevent the armature 3 from rotating randomly, which has the same effect as the aforementioned tension spring and will not be elaborated here.

[0093] Refer to Figure 6The embodiment of the present application further provides a circuit breaker 200, comprising a housing 201 and the above-mentioned trip assembly 100, wherein the housing 201 has an installation cavity, and the trip assembly 100 is installed in the installation cavity.

[0094] Based on the above-mentioned embodiments of the present application, the circuit breaker 200 having the above-mentioned trip assembly 100 simplifies the structure of the trip assembly 100 and reduces the number of parts, thereby simplifying the assembly operation of the trip assembly 100, effectively improving the assembly efficiency of the trip assembly 100 on the circuit breaker 200, and further facilitating improving the overall assembly efficiency of the circuit breaker 200.

[0095] In addition, the trip assembly 100 has a high operational stability, as has been specifically described in the foregoing embodiments. Therefore, the use of the trip assembly 100 can effectively improve the stability and reliability of the on-off control of the circuit breaker 200.

[0096] In addition, the circuit breaker 200 also includes an arc extinguishing assembly arranged in the housing 201. The arc extinguishing assembly generally includes a plurality of sets of arc extinguishing grids arranged in parallel. The arc extinguishing assembly is located on the side of the yoke 2 away from the armature 3. The bottom plate of the yoke 2 is parallel to the arc extinguishing grids. The bottom plate of the yoke 2 is away from the side where the first magnetic conductive plate 23 and the second magnetic conductive plate 24 are arranged and is close to the arc extinguishing assembly. In this way, when the arc moves from the arc striking angle 22 to the bottom plate of the yoke 2, the arc can quickly and accurately enter the arc extinguishing assembly. The arc extinguishing grids in the arc extinguishing assembly cooperate with the bottom plate to divide the arc into multiple small arcs, thereby achieving the effect of quickly extinguishing the arc. This arrangement is conducive to improving the arc extinguishing ability in the circuit breaker 200, reducing the possibility of the arc damaging other components in the circuit breaker 200, thereby improving the safety of the circuit breaker 200 and extending the service life of the circuit breaker 200.

[0097] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A tripping component, characterized in that, include: The conductive plate comprises a wiring portion, a conductive portion and a static contact portion which are integrally arranged; A magnetic yoke having a mounting groove, and an arc-starting angle is integrally provided on the magnetic yoke; The conductive plate is fixedly connected to the magnetic yoke, the conductive portion is partially located in the assembly groove, and the static contact portion is connected to the arc striking angle.

2. The trip assembly according to claim 1, wherein The arc striking angle is arranged on a side of the yoke close to the static contact portion, and the arc striking angle includes: An arc-starting section is bent toward the magnetic yoke in a direction away from the conductive plate, and an end of the arc-starting section away from the magnetic yoke is folded toward the static contact portion; A fixed section is arranged at the end of the arc-starting section away from the magnetic yoke, and the fixed section is fixedly connected to the conductive plate.

3. The trip assembly according to claim 2, wherein A docking portion is provided at a portion of the arc striking section close to the stationary contact portion, and the stationary contact portion is connected to the docking portion.

4. The trip assembly according to claim 2, characterized in that, The static contact portion is folded relative to the conductive portion, the static contact portion is arranged at an angle with the conductive portion, and a static contact point is arranged on the static contact portion; At least one first connection portion is disposed on a portion of the conductive portion close to the stationary contact portion, and a second connection portion is disposed on the fixed section, wherein the first connection portion is connected to the second connection portion.

5. The trip assembly according to any one of claims 1-4, characterized in that, The magnetic yoke comprises a bottom plate and a first magnetic conductive plate and a second magnetic conductive plate arranged on the bottom plate at intervals, wherein the first magnetic conductive plate, the second magnetic conductive plate and the bottom plate enclose the assembly groove; The trip assembly also includes: An armature is rotatably connected to the first magnetic conductive plate and the second magnetic conductive plate, and the armature has an open position and a closed position, and can be switched between the open position and the closed position; An elastic member has one end connected to the yoke and the other end connected to the armature, and the elastic member can maintain the armature in the open position.

6. The trip assembly according to claim 5, wherein, The first magnetic conductive plate is provided with a rotation connection hole, and the second magnetic conductive plate is provided with a rotation limiting groove; The armature is provided with a rotating column, which is rotatably connected to the rotating connecting hole. Part of the armature is inserted into the rotating limiting groove. The two opposite groove walls of the rotating limiting groove are arranged at an angle. The rotating limiting groove can limit the rotating angle of the armature.

7. The trip assembly according to claim 5, characterized in that, The first magnetic conductive plate and the second magnetic conductive plate are both provided with a rotation connection hole, and both sides of the armature are provided with a rotation column, and the two rotation columns are rotationally connected to the corresponding rotation connection holes; A limiting structure is provided on the yoke or the armature, and the limiting structure can limit the rotation angle of the armature.

8. The trip assembly according to claim 5, wherein The first magnetic conductive plate and the second magnetic conductive plate are both provided with a rotation connection hole, a rotating shaft is provided on the rotation connection hole, and a plug-in through hole is provided on the armature, and the armature is rotationally connected to the rotating shaft through the plug-in through hole; A limiting structure is provided on the yoke or the armature, and the limiting structure can limit the rotation angle of the armature.

9. The trip assembly according to claim 6 or 7, characterized in that, The elastic member is a tension spring, the yoke is provided with a first assembly column, the armature is provided with a second assembly column, the first end of the tension spring is connected to the first assembly column, and the second end of the elastic member is connected to the second assembly column; Alternatively, the elastic member is a torsion spring, and the torsion spring is sleeved on the rotating column.

10. A circuit breaker, characterized in that, Comprising a housing and a tripping assembly as described in any one of claims 1-9, the tripping assembly being installed in the housing.

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