Static contact assembly and circuit breaker

Abstract

The utility model provides a static contact assembly and a circuit breaker, relates to the technical field of circuit breakers, and is used for improving the installation efficiency of the static contact assembly. The static contact assembly comprises a static contact, a static contact point and an arc striking structure, the static contact comprises a first current-carrying section, a second current-carrying section and a third current-carrying section which are connected in sequence, and a U-shaped space is defined by the first current-carrying section, the second current-carrying section and the third current-carrying section. And the static contact is arranged on one side, far away from the first current-carrying section, of the third current-carrying section. The arc striking structure comprises a first supporting section, a second supporting section, a third supporting section and an arc striking section which are connected in sequence, the first supporting section, the second supporting section and the third supporting section form a U-shaped structure, and the U-shaped structure is located in the U-shaped space. The first supporting section is attached to the first current-carrying section, and the third supporting section is attached to the third current-carrying section. The arc striking section is located outside the U-shaped space, and the arc striking section is located at a position close to the static contact. The first supporting section, the second supporting section, the third supporting section and the arc striking section are integrally formed.

Description

Technical Field

[0001] The present application relates to the technical field of circuit breakers, and in particular to a static contact assembly and a circuit breaker. Background Art

[0002] A circuit breaker typically consists of a housing, a contact system, an arc-extinguishing assembly, an operating mechanism, and a trip unit. When a short circuit or overload occurs in the circuit breaker, the trip unit instantly trips and activates the operating mechanism. The operating mechanism then separates the moving and stationary contacts of the contact system, disconnecting the current in the circuit. When the moving and stationary contacts separate, an arc is generated between them. To prevent arcing from posing a threat to the safe operation of the power system, an arc-strike mechanism is typically installed on the stationary contact to guide the arc to the arc-extinguishing assembly, where it cools and extinguishes.

[0003] In addition, in the prior art, a static contact point is often provided on the static contactor, and the static contact point is used to contact the moving contactor. In order to prevent the position of the static contact point from changing, a support column is installed on the static contactor.

[0004] However, the installation of the arc striking structure and the support column in the prior art is relatively complicated, which reduces the installation efficiency of the static contact assembly. Utility Model Content

[0005] The present application provides a static contact assembly and a circuit breaker, which are used to improve the installation efficiency of the static contact assembly.

[0006] In a first aspect, the present application provides a static contact assembly comprising a static contact, a static contact point, and an arc-striking structure, wherein the static contact comprises a first current-carrying section, a second current-carrying section, and a third current-carrying section connected in sequence, wherein the first current-carrying section, the second current-carrying section, and the third current-carrying section are arranged to form a U-shaped space. The static contact point is arranged on a side of the third current-carrying section away from the first current-carrying section. The arc-striking structure comprises a first support section, a second support section, a third support section, and an arc-striking section connected in sequence, wherein the first support section, the second support section, and the third support section form a U-shaped structure, and the U-shaped structure is located within the U-shaped space. The first support section is in contact with the first current-carrying section, and the third support section is in contact with the third current-carrying section. The arc-striking section is located outside the U-shaped space, and the arc-striking section is located near the static contact point. The first support section, the second support section, the third support section, and the arc-striking section are integrally formed.

[0007] When using the above technical solution, the static contact is located on the side of the third current-carrying section away from the first current-carrying section. The arc-strike section is located outside the U-shaped space and close to the static contact. This facilitates the extraction of the arc generated when the moving contact separates from the static contact and directs it to the arc-extinguishing assembly when a short circuit or overload occurs in the circuit of the circuit breaker. The third support section and arc-strike section provide magnetic conduction and arc-strike functions, enabling rapid arc extinguishing and improving the short-circuit or overload breaking capacity of the circuit breaker. The arc-strike structure provides support for the static contact, ensuring that it does not deform and does not swing side to side due to vibration during use. Furthermore, the static contact located on the third current-carrying section maintains its position after multiple contact and separation operations with the moving contact, maintaining a stable support position. When the moving contact needs to make contact with the static contact, the static contact remains in the preset position. Under normal operating conditions, the static contact and the moving contact always maintain close contact. Avoid the change of the static contact position, which may cause poor contact between the moving contact and the static contact, affecting the performance of the circuit breaker.

[0008] The first, second, and third support segments, along with the arc-starting segment, are integrally formed, eliminating the need for cuttings and improving material utilization. The interconnections between the first, second, and third support segments and the arc-starting segment are omitted, reducing assembly steps for the arc-starting structure while ensuring sufficient strength. Furthermore, during installation, the arc-starting structure and the static contact can be assembled in one step, making installation more convenient and improving the installation efficiency of the static contact assembly.

[0009] In a possible design, the distance between the inner wall of the first current-carrying section and the inner wall of the third current-carrying section is smaller than the distance between the outer wall of the first supporting section and the outer wall of the third supporting section.

[0010] When adopting the above technical solution, during actual installation, the U-shaped structure can be directly placed in the U-shaped space according to the preset position. It can be installed in one step without any other operations, which simplifies the installation steps between the static contact and the arc striking structure.

[0011] In a possible design, the arc striking structure is engaged with the static contact.

[0012] When the above technical solution is adopted, the installation operation between the arc striking structure and the static contact is more convenient.

[0013] In a possible design, the arc striking structure is provided with one of a buckle and a slot that cooperate with each other, and the static contact is provided with the other of the buckle and the slot.

[0014] When the above technical solution is adopted, when the buckle is inserted into the slot, the arc striking structure is engaged with the static contact, so as to limit the position change of the arc striking structure relative to the static contact.

[0015] In a possible design, a buckle is provided on at least one side of the first supporting section parallel to its length direction, and a corresponding slot is provided on the first current-carrying section.

[0016] In a possible design, the static contact and the arc striking structure are connected via a threaded structure or the static contact and the arc striking structure are riveted.

[0017] When the above technical solution is adopted, the connection methods between the static contact and the arc striking structure are diversified, which is convenient for selection according to actual conditions.

[0018] In a possible design, the static contact is an integral structure.

[0019] When adopting the above technical solution, there is no cutting debris, and the raw material utilization rate is high. In addition, the mutual connection between the first current-carrying section, the second current-carrying section, and the third current-carrying section is omitted, which saves the assembly process of the static contact and can also ensure that the static contact has sufficient strength.

[0020] In a possible design, a first shunt groove is provided on the static contact, and the first shunt groove runs through the first current-carrying section and the second current-carrying section.

[0021] When the above technical solution is adopted, on the one hand, the force that needs to be overcome during the forming process of the static contact is reduced, making it easier to bend and form. On the other hand, material is saved and the processing cost is low.

[0022] In a possible design, a second diverter groove is provided on the arc striking structure, and the second diverter groove runs through the first supporting section and the second supporting section.

[0023] When the above technical solution is adopted, the force required to be overcome during the arc-starting structure forming process is reduced, making it easier to bend and form. At the same time, material is saved and the processing cost is low.

[0024] In a second aspect, the present application provides a circuit breaker comprising a housing, a movable contact, an arc extinguishing assembly, and a stationary contact assembly as described in any possible implementation of the first aspect, wherein the stationary contact assembly is fixedly disposed within a cavity of the housing. A movable contact is disposed within the cavity of the housing and is configured to mate with the stationary contact assembly. An arc extinguishing assembly is disposed within the cavity of the housing and is configured to cool and extinguish an arc.

[0025] The beneficial effects of the circuit breaker described in the second aspect can refer to the beneficial effects of the static contact assembly described in the first aspect, and are not described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of a static contact assembly provided in the prior art.

[0027] Figure 2 This is a schematic structural diagram of the static contact assembly provided in an embodiment of the present application.

[0028] Figure 3 A schematic side view of a static contact assembly provided in an embodiment of the present application.

[0029] Figure 4 This is a schematic structural diagram of the static contact provided in an embodiment of the present application.

[0030] Figure 5 A schematic structural diagram of the arc striking structure provided in an embodiment of the present application.

[0031] Figure 6 A side view schematic diagram of the arc striking structure provided in an embodiment of the present application.

[0032] Description of reference numerals:

[0033] Existing technology: 10'-static contact, 11'-first current-carrying section, 12'-second current-carrying section, 13'-third current-carrying section,

[0034] 20'-static contact, 30'-arc striking structure, 40'-support column;

[0035] This application: 100-static contact assembly;

[0036] 10-static contact, 11-first current-carrying section, 12-second current-carrying section, 13-third current-carrying section, 14-card slot, 15-first shunt slot,

[0037] 16-connecting segment, 17-fixing segment;

[0038] 20-static contact, 30-arc striking structure, 31-first supporting section, 32-second supporting section, 33-third supporting section, 34-arc striking section, 35-clip, 36-second diverter slot. DETAILED DESCRIPTION

[0039] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover non-exclusive inclusions.

[0041] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it necessarily refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] The term "and / or" in this document simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists, A and B exist, and B exists. Additionally, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0043] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the current limiting module of the present application. For example, in the description of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application.

[0044] In addition, the terms "first", "second", etc. in the description and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order, and may explicitly or implicitly include one or more such features.

[0045] In the description of this application, unless otherwise specified, "plurality" means more than two (including two), and similarly, "multiple groups" means more than two (including two).

[0046] In the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, "connected" or "connected" in a mechanical structure can refer to a physical connection. For example, a physical connection can be a fixed connection, such as a fixed connection via a barrier, such as a screw, bolt, or other barrier. A physical connection can also be a removable connection, such as a snap-fit ​​connection. A physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances. "Connected" or "connected" in a circuit structure can refer not only to a physical connection, but also to an electrical connection or a signal connection. For example, it can be a direct connection, i.e., a physical connection, or an indirect connection through at least one intermediate component, as long as circuit connectivity is achieved. It can also refer to internal communication between two components. A signal connection can refer not only to signal connection through an electrical circuit, but also to signal connection through a media medium, such as radio waves. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0047] When a short circuit or overload occurs in the circuit where the circuit breaker is located, an arc is generated between the moving contact and the static contact 10 ′ during the process of separation of the moving contact and the static contact 10 ′ of the circuit breaker.

[0048] In the prior art, such as Figure 1 As shown, the static contact 10' generally includes a first current-carrying section 11', a second current-carrying section 12' and a third current-carrying section 13' connected in sequence, and the first current-carrying section 11', the second current-carrying section 12' and the third current-carrying section 13' are surrounded to form a U-shaped space.

[0049] In order to prevent the arc from causing hidden dangers to the safe operation of the power system, an arc striking structure 30' is generally provided on the static contact 10' to guide the arc to the arc extinguishing assembly, where the arc is finally cooled and extinguished.

[0050] In actual situations, the arc striking structure 30 ′ is installed on the third current-carrying section 13 ′.

[0051] Currently, the arc striking structure 30 ′ and the third current-carrying section 13 ′ are often connected by screws or rivets.

[0052] Meanwhile, in the prior art, a static contact 20' is generally provided on the static contact 10', and the static contact 20' is used to contact the moving contact. The static contact 20' is provided on a side of the third current-carrying section 13' away from the first current-carrying section 11'.

[0053] In order to prevent the position of the static contact 20' from changing, the method adopted in the prior art is to install a support column 40' on the static contact 10', such as Figure 1 shown.

[0054] Specifically, the support column 40 ′ is located in the U-shaped space, one end of the support column 40 ′ is supported on the first current-carrying section 11 ′, and the other end of the support column 40 ′ is supported on the third current-carrying section 13 ′.

[0055] In this way, the arc striking structure 30' and the support column 40' are two separate components. In actual operation, the arc striking structure 30' and the support column 40' need to be designed and processed separately. During installation, the arc striking structure 30' and the support column 40' need to be connected to the static contact 10' separately, and the processing and installation process is relatively cumbersome.

[0056] In order to solve the above problems existing in the prior art, first, the present application provides a circuit breaker, including a housing, a moving contact, an arc extinguishing assembly and Figure 2 、 Figure 3 The static contact assembly 100 shown is fixedly disposed in a cavity of a housing.

[0057] The fixed connection method between the static contact assembly 100 and the housing is not specifically limited here. For example, it can be screw connection, riveting, clamping, etc.

[0058] The moving contact is housed within the housing and is designed to mate with the stationary contact assembly 100. When the stationary contact assembly 100 makes contact with the moving contact, the current in the circuit breaker is conducted, and the circuit within the circuit breaker operates normally. If a short circuit or overload occurs in the circuit within the circuit breaker, the stationary contact assembly 100 separates from the moving contact, disconnecting the current in the circuit breaker and the circuit within the circuit breaker.

[0059] In practice, when the static contact assembly 100 and the moving contact separate, an arc is generated between them. However, the arc extinguishing assembly provided in the embodiment of the present application is disposed within the cavity of the housing and is capable of cooling and extinguishing the arc, thereby preventing the arc from spreading to other components within the circuit breaker, thereby preventing sparks or damage to other components.

[0060] See also Figure 2 and Figure 3 As shown, an embodiment of the present application further provides a static contact assembly 100 , including a static contact 10 , a static contact point 20 and an arc striking structure 30 .

[0061] The static contact 10 includes a first current-carrying section 11 , a second current-carrying section 12 and a third current-carrying section 13 connected in sequence. The first current-carrying section 11 , the second current-carrying section 12 and the third current-carrying section 13 are arranged to form a U-shaped space.

[0062] In practice, see Figures 2 to 4 As shown, the static contact 10 further includes a fixed section 17 and a connecting section 16. One end of the connecting section 16 is connected to one end of the fixed section 17, and the other end of the connecting section 16 is connected to the end of the first current-carrying section 11 that is away from the second current-carrying section 12. The fixed section 17 can be fixedly connected to the housing to secure the static contact 10 thereto. The fixed section 17 is also used to connect to a conductor outside the circuit breaker housing to connect the circuit breaker.

[0063] For example, the fixed section 17, the first current-carrying section 11, the second current-carrying section 12, and the third current-carrying section 13 may all be plate-like structures or strip-like structures, with the first current-carrying section 11 and the third current-carrying section 13 disposed on opposite sides of the second current-carrying section 12. The first current-carrying section 11 and the third current-carrying section 13 may be parallel to each other. Of course, the first current-carrying section 11 may also form an acute angle or an obtuse angle with the third current-carrying section 13, which is not specifically limited here and is subject to actual circumstances.

[0064] See also Figure 2 and Figure 3 As shown, the static contact 20 is disposed on a side of the third current-carrying section 13 away from the first current-carrying section 11 , the static contact 20 is supported by the third current-carrying section 13 , and the static contact 20 is located outside the U-shaped space.

[0065] In practice, the static contact 20 is configured to cooperate with the movable contact. When the static contact 20 and the movable contact make contact, the current in the circuit breaker is conducted, and the circuit in which the circuit breaker resides operates normally. If a short circuit or overload occurs in the circuit in which the circuit breaker resides, the static contact 20 separates from the movable contact, disconnecting the current in the circuit breaker and the circuit in which the circuit breaker resides.

[0066] In actual situations, the material of the static contact 20 can be silver or copper with silver plating on the surface. Of course, it is not limited thereto.

[0067] Silver is a common material for the static contact 20. Silver has excellent electrical conductivity, reducing contact resistance and lowering the temperature rise of the static contact assembly 100, thereby reducing energy loss and heat generation, and extending the service life of the static contact assembly 100. Furthermore, silver is also highly wear-resistant, capable of withstanding frequent switching operations without wear, thus ensuring the stability and reliability of the circuit breaker.

[0068] In one possible implementation, see Figure 2 、 Figure 3 、 Figure 5 and Figure 6 The arc-striking structure 30 includes a first supporting segment 31, a second supporting segment 32, a third supporting segment 33 and an arc-striking segment 34 connected in sequence. The first supporting segment 31, the second supporting segment 32 and the third supporting segment 33 form a U-shaped structure, and the U-shaped structure is located in the U-shaped space.

[0069] The first support section 31 is arranged relative to the third support section 33 through the second support section 32. The side of the first support section 31 away from the second support section 32 is suspended. Similarly, the side of the third support section 33 away from the second support section 32 is suspended. When the arc-striking structure 30 is subjected to a certain external force, the side of the first support section 31 away from the second support section 32 can move closer to or away from the third support section 33. Similarly, the side of the third support section 33 away from the second support section 32 can move closer to or away from the first support section 31. In this way, the arc-striking structure 30 is elastic. During the process of installing the U-shaped structure on the static contact 10, the U-shaped structure can deform to facilitate the installation of the arc-striking structure 30.

[0070] The arc striking section 34 is located outside the U-shaped space, and the arc striking section 34 is located near the static contact 20 .

[0071] It should be noted that the end of the arc-strike segment 34, distal from the third support segment 33, extends toward the arc-extinguishing assembly. This allows the arc to be easily guided by the arc-strike segment 34 to the arc-extinguishing assembly when a short circuit or overload occurs in the circuit breaker. Guided by the arc-strike segment 34, the arc moves from the static contact 20 to the arc-extinguishing assembly, where it cools and extinguishes. This prevents the arc from spreading to other components within the circuit breaker, potentially causing sparks or damage.

[0072] In some embodiments, see Figure 3 As shown, the first supporting section 31 is in contact with the first current-carrying section 11 , and the third supporting section 33 is in contact with the third current-carrying section 13 .

[0073] On the one hand, the arrangement of the third supporting section 33 and the arc striking section 34 plays the role of magnetic conduction and arc striking.

[0074] When a short circuit or overload occurs in the circuit breaker, the current flowing through the static contact 20 increases instantaneously. The third support segment 33 enhances magnetic conductivity, generating a strong magnetic repulsive force that quickly separates the movable contact 20 from the movable contact, thereby interrupting the current in the circuit breaker. This separation generates an arc. The magnetic repulsive force generated by the third support segment 33 and the guidance of the arc-starting segment 34 rapidly direct the arc toward the arc-extinguishing assembly, where it cools and extinguishes the arc. This achieves rapid arc extinguishing, improving the circuit breaker's short-circuit and overload interrupting capability.

[0075] On the other hand, the first supporting section 31 is in contact with the first current-carrying section 11, and the third supporting section 33 is in contact with the third current-carrying section 13. The first supporting section 31 can be parallel to the first current-carrying section 11, and the third supporting section 33 can be parallel to the third current-carrying section 13. The second supporting section 32 is connected between the first supporting section 31 and the third supporting section 33. Under the action of the second supporting section 32, the third supporting section 33 can provide supporting force for the third current-carrying section 13. The third supporting section 33 is used to provide supporting force for the third current-carrying section 13 away from the first current-carrying section 11. When the third supporting section 33 provides supporting force for the third current-carrying section 13, the first supporting section 31 is subjected to the force of the first current-carrying section 11 to approach the third supporting section 33, so that the third supporting section 33 is closely fitted with the third current-carrying section 13 to provide stable supporting force for the third current-carrying section 13.

[0076] As shown above, when the circuit current in the circuit breaker needs to be connected, the moving contact moves toward the static contact 20. The third current-carrying section 13 supporting the static contact 20 is subjected to a force from the moving contact, which acts to move toward the first current-carrying section 11. The arc-striking structure 30 interacts with the static contact 10, providing support for the static contact 10. This ensures that the static contact 10 does not deform and does not swing sideways due to vibration during use. Furthermore, after multiple contact and separation operations with the moving contact, the static contact 20 located on the third current-carrying section 13 remains in place, maintaining a stable position. When the moving contact needs to contact the static contact 20, the static contact 20 remains in the preset position. Under normal operating conditions, the static contact 20 and the moving contact maintain close contact at all times. This prevents the static contact 20 from shifting in position, which could lead to poor contact between the moving and static contacts, and thus affect the performance of the circuit breaker.

[0077] In a possible implementation, the first supporting segment 31 , the second supporting segment 32 , the third supporting segment 33 and the arc striking segment 34 are integrally formed.

[0078] When manufacturing the arc-striking structure 30, a metal sheet can be integrally bent and formed, eliminating the need for cutting scrap and improving material utilization. Furthermore, the interconnections between the first support segment 31, the second support segment 32, the third support segment 33, and the arc-striking segment 34 are omitted, saving assembly steps for the arc-striking structure 30 while ensuring sufficient strength.

[0079] Moreover, after the arc-striking structure 30 and the static contact 10 are connected, the arc-striking structure 30 simultaneously plays the role of striking the arc and supporting the static contact 10. The arc-striking segment 34 provided in the embodiment of the present application can play the role of the arc-striking structure 30' in the prior art, and the first support segment 31, the second support segment 32 and the third support segment 33 provided in the embodiment of the present application can play the role of the support column 40' in the prior art. In other words, the arc-striking structure 30 provided in the embodiment of the present application has an integrated structure and the functions of the arc-striking structure 30' and the support column 40' in the prior art. During actual installation, the arc-striking structure 30 and the static contact 10 can be installed in place in one step, and the installation operation is relatively convenient, thereby improving the installation efficiency of the static contact assembly 100.

[0080] In a specific implementation, the arc-striking structure 30 can be connected to the static contact 10 by screw connection, riveting, or other methods. For example, when the arc-striking structure 30 is riveted to the static contact 10, rivet holes can be provided at corresponding positions on the third current-carrying section 13 and the third support section 33, and rivets can be inserted through the rivet holes, thereby connecting the arc-striking structure 30 to the static contact 10. Of course, rivet holes can also be provided at corresponding positions on the first current-carrying section 11 and the first support section 31, and this is not specifically limited here.

[0081] It should be noted that when the first support segment 31 is aligned with the first current-carrying segment 11 and the third support segment 33 is aligned with the third current-carrying segment 13, the second support segment 32 and the second current-carrying segment 12 may be aligned with each other or may have a gap therebetween. When the second support segment 32 and the second current-carrying segment 12 are both plate-like structures, the plane on which the second support segment 32 lies and the plane on which the second current-carrying segment 12 lies may be parallel to each other or may have an angle therebetween. This is not specifically limited here and is subject to actual circumstances.

[0082] For the sake of convenience of description, it is defined that the first supporting section 31, the second supporting section 32, and the third supporting section 33 provided in the embodiment of the present application are all plate-like structures, and the first current-carrying section 11, the second current-carrying section 12, and the third current-carrying section 13 are all plate-like structures.

[0083] In a possible design, the distance between the inner wall of the first current-carrying section 11 and the inner wall of the third current-carrying section 13 is smaller than the distance between the outer wall of the first support section 31 and the outer wall of the third support section 33 .

[0084] It should be noted that in the embodiments provided herein, the inner wall of the first current-carrying section 11 is the side of the first current-carrying section 11 used to form the U-shaped space. Similarly, the inner wall of the third current-carrying section 13 is the side of the third current-carrying section 13 used to form the U-shaped space. The outer wall of the first support section 31 is the side where the first support section 31 and the first current-carrying section 11 meet, and the outer wall of the third support section 33 is the side where the third support section 33 and the third current-carrying section 13 meet.

[0085] With this arrangement, an interference fit is achieved between the U-shaped structure and the static contact 10. After the U-shaped structure of the arc striking structure 30 is placed in the U-shaped space according to a preset position, the first current-carrying section 11 is in close contact with the first support section 31, and the third current-carrying section 13 is in close contact with the third support section 33.

[0086] During actual installation, the U-shaped structure can be directly placed in the U-shaped space according to the preset position. It can be installed in one step without performing other operations, which simplifies the installation steps between the static contact 10 and the arc striking structure 30.

[0087] It is worth noting that when the arc-striking structure 30 is connected to the static contact 10 via screws, rivets, or other methods, threaded holes or riveted through-holes are required at the connection point between the static contact 10 and the arc-striking structure 30, and screws or rivets are used to assemble the arc-striking structure 30 and the static contact 10. In this structure, the cross-sectional area of ​​the static contact 10 is affected by the threaded holes or riveted through-holes, and the current-carrying cross-sectional area is reduced, thereby affecting the temperature rise and current-carrying performance of the static contact 10, resulting in problems such as increased temperature rise and reduced current-carrying performance of the static contact assembly 100.

[0088] In view of this, in some embodiments provided in the present application, the arc striking structure 30 and the static contact 10 can be snap-connected, and the installation operation is relatively convenient.

[0089] In a specific implementation, an interference fit can be provided between the U-shaped structure and the static contact 10. At the same time, the arc-striking structure 30 is engaged with the static contact 10. This not only enhances the secure connection between the arc-striking structure 30 and the static contact 10 but also prevents the relative position of the arc-striking structure 30 and the static contact 10 from changing, which could cause the arc-striking segment 34 to misalign and affect the arc-striking effect. Furthermore, there is no need to provide threaded holes or riveted through-holes in the static contact 10 or the arc-striking structure 30. The cross-sectional area of ​​the static contact 10 is not affected by the threaded holes or riveted through-holes, and the temperature rise, current carrying capacity, and other properties of the static contact 10 are not affected.

[0090] Specifically, mutually cooperating protrusions and recesses may be provided between the inner wall of the first current-carrying section 11 and the outer wall of the first support section 31 to limit positional changes of the arc striking structure 30 relative to the stationary contact 10. Of course, mutually cooperating protrusions and recesses may also be provided between the inner wall of the third current-carrying section 13 and the outer wall of the third support section 33, and this is not specifically limited herein.

[0091] As a possible implementation, see Figure 2 and Figure 3As shown, the arc striking structure 30 is provided with one of the mutually cooperating buckles 35 and the slots 14, and the static contact 10 is provided with the other of the buckles 35 and the slots 14. When the buckle 35 is inserted into the slots 14, the arc striking structure 30 and the static contact 10 are engaged, thereby limiting the position of the arc striking structure 30 relative to the static contact 10 from changing.

[0092] In practice, see Figures 4 to 6 As shown, a buckle 35 can be provided on at least one side of the first supporting section 31 parallel to its length direction, and a corresponding slot 14 can be provided on the first current-carrying section 11 .

[0093] Specifically, one, two, three, or more buckles 35 may be provided on one side of the first support section 31 parallel to its length, and a corresponding locking groove 14 may be provided on the first current-carrying section 11. Alternatively, one, two, three, or more buckles 35 may be provided on both sides of the first support section 31 parallel to its length, and a corresponding locking groove 14 may be provided on the first current-carrying section 11.

[0094] In the embodiment provided in the present application, one, two, three or more slots 14 may be provided on at least one side of the first supporting section 31 parallel to its length direction, and a corresponding buckle 35 may be provided on the first current-carrying section 11 .

[0095] Furthermore, one, two, three, or more slots 14 may be provided on at least one side of the third support segment 33 parallel to its lengthwise direction, and corresponding snaps 35 may be provided on the third current-carrying segment 13. One, two, three, or more snaps 35 may also be provided on at least one side of the third support segment 33 parallel to its lengthwise direction, and corresponding slots 14 may be provided on the third current-carrying segment 13.

[0096] In a specific implementation, the buckle 35 and the slot 14 can be provided on the arc striking structure 30, and the slot 14 and the buckle 35 can be provided on the static contact 10 accordingly. The position and number of the buckle 35 or the slot 14 provided on the arc striking structure 30 are not specifically limited here and are subject to actual conditions.

[0097] In the embodiment provided in the present application, the buckle 35 provided on the arc striking structure 30 can be formed by bending a portion of the arc striking structure 30 toward the static contact 10 .

[0098] As an optional embodiment, the static contact 10 is an integrated structure.

[0099] In practice, the metal sheet can be integrally bent and formed. This eliminates cutting waste and improves material utilization. Furthermore, the interconnections between the first current-carrying section 11, the second current-carrying section 12, and the third current-carrying section 13 are omitted, saving assembly steps for the stationary contact 10 while ensuring sufficient strength for the stationary contact 10.

[0100] Of course, in actual situations, the second current-carrying section 12 may also be connected to the first current-carrying section 11 and the third current-carrying section 13 respectively by welding, which is not specifically limited here.

[0101] In some embodiments, see Figure 2 and Figure 4 As shown, a first shunt groove 15 is provided on the static contact 10 , and the first shunt groove 15 runs through the first current-carrying section 11 and the second current-carrying section 12 .

[0102] Thus, on the one hand, the force that needs to be overcome during the forming process of the static contact 10 is reduced, making it easier to bend and form. On the other hand, material is saved and the processing cost is low.

[0103] Furthermore, a second diverter groove 36 is provided on the arc striking structure 30 , and the second diverter groove 36 runs through the first supporting section 31 and the second supporting section 32 .

[0104] In this way, the arc-starting structure 30 needs to overcome less force during the forming process, making it easier to bend and form. At the same time, material is saved and the processing cost is low.

Claims

1. A static contact assembly, characterized in that: include: A static contact, the static contact comprising a first current-carrying section, a second current-carrying section, and a third current-carrying section connected in sequence, wherein the first current-carrying section, the second current-carrying section, and the third current-carrying section enclose a U-shaped space; a static contact, arranged on a side of the third current-carrying section away from the first current-carrying section; An arc striking structure, the arc striking structure comprising a first supporting segment, a second supporting segment, a third supporting segment and an arc striking segment connected in sequence; The first supporting segment, the second supporting segment, and the third supporting segment form a U-shaped structure, and the U-shaped structure is located in the U-shaped space; the first supporting segment is in contact with the first current-carrying segment, and the third supporting segment is in contact with the third current-carrying segment; The arc striking section is located outside the U-shaped space, and the arc striking section is located near the static contact; Wherein, the first supporting segment, the second supporting segment, the third supporting segment and the arc striking segment are integrally formed.

2. The static contact assembly according to claim 1, characterized in that: A distance between an inner wall of the first current-carrying section and an inner wall of the third current-carrying section is smaller than a distance between an outer wall of the first supporting section and an outer wall of the third supporting section.

3. The static contact assembly according to claim 1 or 2, characterized in that: The arc striking structure is clamped with the static contact.

4. The static contact assembly according to claim 3, characterized in that: The arc striking structure is provided with one of a buckle and a slot that cooperate with each other, and the static contact is provided with the other of the buckle and the slot.

5. The static contact assembly according to claim 4, characterized in that: The buckle is provided on at least one side of the first supporting section parallel to the length direction thereof, and the clamping groove is correspondingly provided on the first current-carrying section.

6. The static contact assembly according to claim 1, characterized in that The static contact and the arc striking structure are connected via a threaded structure or the static contact and the arc striking structure are riveted.

7. The static contact assembly according to claim 1, characterized in that: The static contact is an integrated structure.

8. The static contact assembly according to claim 1, characterized in that: The static contact is provided with a first shunt groove, and the first shunt groove runs through the first current-carrying section and the second current-carrying section.

9. The static contact assembly according to claim 1, characterized in that: The arc striking structure is provided with a second diverter groove, and the second diverter groove runs through the first supporting section and the second supporting section.

10. A circuit breaker, characterized in that: include: The static contact assembly according to any one of claims 1 to 9; a housing, wherein the static contact assembly is fixedly disposed in a cavity of the housing; A moving contact is disposed in the cavity of the housing; the moving contact is used to cooperate with the static contact assembly; The arc extinguishing assembly is arranged in the cavity of the shell; the arc extinguishing assembly is used to cool and extinguish the arc.

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