Circuit breaker

Abstract

The utility model relates to the technical field of electric appliance switches, in particular to a circuit breaker. The circuit breaker comprises a base, a rotating assembly, a contact assembly, a cover body assembly, an operating mechanism and an instantaneous tripping mechanism, the base is provided with a first shell and a second shell which are detachably connected, and the first shell and the second shell are oppositely arranged in the first direction and define a first assembly cavity; in the first direction, the first shell is provided with a first assembly hole, the second shell is provided with a second assembly hole, and the first assembly hole and the second assembly hole are oppositely arranged and communicate with the first assembly cavity. The rotating assembly penetrates through and is mounted in the first assembly hole and the second assembly hole; the contact assembly is installed in the first assembling cavity. The cover body assembly covers the base, a second assembling cavity is defined by the cover body assembly and the base, and the operating mechanism is installed in the second assembling cavity. Therefore, the modularized base can be formed, the universality and interchangeability of the base are improved, and the use cost is reduced.

Description

Technical Field

[0001] This application relates to the field of electrical switch technology, and in particular to a circuit breaker. Background Technology

[0002] A circuit breaker is an electrical switching device that can close, carry, and interrupt current under normal circuit conditions, and quickly disconnect the circuit under abnormal circuit conditions to protect the safety of the circuit and equipment.

[0003] A circuit breaker includes a contact system, an arc-extinguishing system, a manual operating mechanism, a trip unit, a base, and a cover assembly. The base and cover assembly enclose an assembly space, within which the contact system, arc-extinguishing housing, manual operating mechanism, and trip unit are housed. However, this design requires corresponding numbers of contact systems and arc-extinguishing systems to accommodate circuits of varying complexity, necessitating changes to the base structure. This results in low versatility and interchangeability of the circuit breaker, significantly increasing costs when used in high-capacity, high-energy-density electrical systems. Utility Model Content

[0004] Therefore, it is necessary to provide a circuit breaker that can enhance versatility and interchangeability, and reduce usage costs.

[0005] A circuit breaker includes a base, a rotating assembly, a contact assembly, a cover assembly, an operating mechanism, and an instantaneous tripping mechanism. The base has a first housing and a second housing, which are detachably connected. The first housing and the second housing are arranged opposite to each other along a first direction and enclose a first assembly cavity. Along the first direction, the first housing has a first assembly hole, and the second housing has a second assembly hole. The first assembly hole and the second assembly hole are arranged opposite to each other and communicate with the first assembly cavity. The rotating assembly passes through and is installed in the first assembly hole and the second assembly hole. The contact assembly is installed in the first assembly cavity. The contact assembly includes a moving contact connected to the rotating assembly. The moving component; the cover component is disposed on the base along a second direction and forms a second assembly cavity with the base, the cover component having an opening communicating with the second assembly cavity; the operating mechanism is installed in the second assembly cavity, and the operating mechanism has an operating rod, the operating rod extending out of the second assembly cavity from the opening along a third direction, the operating rod and the rotating component being spaced apart; the operating mechanism and the rotating component are drively connected; the instantaneous release mechanism has a trigger component and a release component, the trigger component is disposed in the first assembly cavity, the release component is disposed in the second assembly cavity and connected to the operating mechanism, the trigger component can extend from the first assembly cavity and trigger the release component to move.

[0006] Understandably, by detachably connecting the first and second housings to form a base, the installation of rotating components, contact components, and triggering components is facilitated, thus creating a modular base. Each base forms an independent first assembly cavity. When encountering a short-circuit current, the decomposed ions remain within the first assembly cavity, without affecting the structure outside the cavity. The base and cover assembly enclose a second assembly cavity to facilitate the installation of the operating mechanism and tripping mechanism. Through the coordinated operation of the tripping mechanism, operating mechanism, rotating components, and contact components, the circuit breaker can handle various operating conditions such as short circuits and overloads, ensuring normal operation of the circuit breaker while forming a modular base. When dealing with complex circuits, multiple bases can be installed side-by-side, eliminating the need to design different bases for different circuits, simplifying operation. When damage occurs in the circuit breaker, only the corresponding base and internal parts need to be replaced or repaired, without disassembling the entire circuit breaker. The detachable first and second housings make base assembly and disassembly more convenient, and the base's versatility and interchangeability are high, reducing operating costs.

[0007] In one embodiment, along the first direction, one of the first housing and the second housing is provided with a positioning protrusion, and the other is provided with a positioning groove; the positioning protrusion is inserted into the positioning groove.

[0008] In one embodiment, the circuit breaker further includes a first locking assembly, the first locking assembly including a first locking member and a first mating member, the first locking member passing through the first housing and the second housing, the head of the first locking member abutting against one of the first housing and the second housing, the first mating member being connected to and locked with the first locking member, the first mating member abutting against the other of the first housing and the second housing.

[0009] In one embodiment, there are multiple bases, which are arranged side by side along the first direction and are detachably connected.

[0010] In one embodiment, the rotating assembly includes a rotating shaft block and a connecting shaft block, wherein the connecting shaft block is assembled between any two adjacent rotating shaft blocks along the first direction.

[0011] In one embodiment, along the first direction, one of any adjacent rotating shaft block and connecting shaft block is provided with a limiting protrusion, and the other is provided with a limiting groove, with the limiting protrusion inserted into the limiting groove.

[0012] In one embodiment, the circuit breaker further includes a second locking member that passes through and locks the plurality of bases.

[0013] In one embodiment, at least one of the first housing and the second housing has an inwardly recessed groove on its outwardly facing surface along the first direction, and the groove communicates with the outside along the second direction; along the first direction, the grooves on both sides of the circuit breaker abut against the cover assembly along the groove wall in the second direction.

[0014] In one embodiment, any two adjacent first housings and second housings in the plurality of bases are respectively provided with the groove, any two adjacent first housings and second housings arranged opposite to each other abut each other, and any two adjacent grooves are connected to form a heat dissipation gap.

[0015] In one embodiment, the circuit breaker further includes an arc-extinguishing assembly disposed in the first assembly cavity and located on the side of the contact assembly opposite to the rotating assembly; the arc-extinguishing assembly forms an arc-extinguishing channel extending in the third direction;

[0016] Along the third direction, on both sides of the arc extinguishing channel, the first housing and the second housing surround and form an assembly opening, at which a wire mesh is installed. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 The schematic diagram of the circuit breaker structure provided in this application;

[0019] Figure 2 Exploded view of the circuit breaker provided in this application;

[0020] Figure 3 An exploded view of the base of the circuit breaker provided in this application;

[0021] Figure 4 Exploded view of multiple bases in the circuit breaker provided in this application;

[0022] Figure 5 A cross-sectional view of the circuit breaker provided in this application;

[0023] Figure 6 A schematic diagram of the internal orientation of the circuit breaker provided in this application;

[0024] Figure 7 A schematic diagram of the operating mechanism and rotating assembly in the circuit breaker provided in this application, showing one orientation.

[0025] Figure 8 A schematic diagram of the operating mechanism and rotating assembly in the circuit breaker provided in this application from another orientation;

[0026] Figure 9 A sectional view of the operating mechanism and instantaneous tripping mechanism in the circuit breaker provided in this application;

[0027] Figure 10 This is a structural schematic diagram of the internal structure of the circuit breaker provided in this application from another orientation.

[0028] Reference numerals: 100, Circuit breaker; 10, Base; 11, First housing; 111, First mounting hole; 12, Second housing; 121, Second mounting hole; 101, First mounting cavity; 13, Positioning protrusion; 14, Positioning groove; 15, Groove; 16, Assembly opening; 17, Sealing plug; 20, Rotating assembly; 201, Limiting protrusion; 202, Limiting groove; 21, Rotating shaft block; 22, Connecting shaft block; 23, First rotating shaft; 24, First transmission shaft; 30, Contact assembly; 31, Moving contact; 32, Stationary contact; 40, Cover assembly; 401, Opening; 41, Cover; 42, Cover plate; 50, Operating mechanism; 51, Operating lever; 52. Rotating seat; 53. First elastic element; 54. Support seat; 55. Second transmission shaft; 56. First transmission rod; 57. Linkage assembly; 571. Second rotating shaft; 572. Third rotating shaft; 573. First connecting rod; 574. Second connecting rod; 5741. First connecting end; 5742. Second connecting end; 5743. Movable end; 61. First locking assembly; 611. First locking element; 612. First mating element; 62. Second locking element; 70. Instantaneous release mechanism; 71. Trigger assembly; 72. Release assembly; 721. Traction rod; 722. Second elastic element; 723. Transmission plate; 80. Arc extinguishing assembly; 90. Wire mesh. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0030] It should be noted that when a component is referred to as being "fixed to," "set on," or "properly placed on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0034] Please see Figures 1 to 10 This application provides a circuit breaker 100, which includes a base 10. The base 10 has a first housing 11 and a second housing 12, which are detachably connected, facilitating easy assembly and disassembly, and maintenance. The first housing 11 and the second housing 12 are arranged opposite to each other along a first direction and enclose a first assembly cavity 101. In this way, the base 10 can form an independent and relatively closed first assembly cavity 101 to protect the internal structure of the base 10. When a short-circuit current is encountered, the ions generated by decomposition can be located within the first assembly cavity 101 without affecting the external structure of the base 10, which helps to improve the dielectric performance of the circuit breaker 100.

[0035] like Figure 3 As shown, along the first direction, the first housing 11 is provided with a first mounting hole 111, and the second housing 12 is provided with a second mounting hole 121. The first mounting hole 111 and the second mounting hole 121 are arranged opposite to each other and communicate with the first mounting cavity 101 respectively. The circuit breaker 100 also includes a rotating assembly 20, which passes through and is installed in the first mounting hole 111 and the second mounting hole 121 so that the rotating assembly 20 can rotate in the first mounting hole 111 and the second mounting hole 121.

[0036] like Figure 2 As shown, in an optional embodiment, the circuit breaker 100 further includes a cover assembly 40 and an operating mechanism 50. The cover assembly 40 covers the base 10 along a second direction and forms a second assembly cavity with the base 10. The operating mechanism 50 is mounted in the second assembly cavity to protect the operating mechanism 50. By forming independent first and second assembly cavities, the operating mechanism 50 is protected from the effects of electro-ions. The operating mechanism 50 is drive-connected to the rotating assembly 20 to transmit force to the rotating assembly 20, causing the rotating assembly 20 to rotate.

[0037] like Figure 1 and Figure 2 As shown, specifically, the cover assembly 40 has an opening 401 communicating with the second assembly cavity, and the operating mechanism 50 has an operating lever 51. The operating lever 51 extends out of the second assembly cavity from the opening 401 to facilitate moving the operating lever 51 from the outside, thereby switching the opening and closing of the circuit breaker 100. Along the third direction, the operating lever 51 and the rotating assembly 20 are spaced apart.

[0038] like Figure 6 As shown, in an optional embodiment, the circuit breaker 100 further includes a contact assembly 30, which is installed in the first assembly cavity 101. The contact assembly 30 includes a moving contact 31, which is connected to the rotating assembly 20. The operating mechanism 50 drives the rotating assembly 20 to rotate, thereby controlling the movement of the moving contact 31. The opening and closing of the circuit breaker 100 is switched by changing the contact movement state, which is simple to operate.

[0039] like Figure 6 and Figure 9As shown, in an optional embodiment, the circuit breaker 100 further includes an instantaneous tripping mechanism 70. The instantaneous tripping mechanism 70 is provided with a triggering component 71 and a tripping component 72. The triggering component 71 is located in the first assembly cavity 101, and the tripping component 72 is located in the second assembly cavity and connected to the operating mechanism 50. The triggering component 71 can extend from the first assembly cavity 101 and trigger the tripping component 72 to move. Thus, in the event of a current short circuit, the triggering component 71 can trigger the tripping component 72 to move, and the tripping component 72 transmits power to the operating mechanism 50. The operating mechanism 50 drives the rotating component 20 to rotate, thereby disconnecting the circuit and providing circuit protection.

[0040] In summary, the base 10 formed by the first housing 11 and the second housing 12 can independently assemble structures such as the rotating assembly 20 and the contact assembly 30, forming a modular base 10. This improves the versatility and interoperability of the base 10 and ensures the normal operation of the components within the base 10. The first housing 11 and the second housing 12 are detachably connected, facilitating the initial fixing of components to one of them before connecting the first housing 11 and the second housing 12, simplifying assembly. When dealing with complex circuits, components can be assembled to their corresponding bases 10, and only the corresponding number of bases 10 needs to be set, without needing to redesign the structure of the base 10 for multiple sets of components. Furthermore, when the circuit breaker 100 requires maintenance, only the corresponding base 10 needs to be replaced or the internal parts of the corresponding base 10 need to be repaired, without disassembling the entire circuit breaker 100 for maintenance, reducing operating costs.

[0041] For ease of explanation, the width direction of the base 10 is defined as the first direction, the height direction of the base 10 is defined as the second direction, and the length direction of the base 10 is defined as the third direction. The third direction is used as the x-axis, the first direction as the y-axis, and the second direction as the z-axis for explanation.

[0042] like Figure 5 As shown, in a specific embodiment, along the first direction, one of the first housing 11 and the second housing 12 is provided with a positioning protrusion 13, and the other is provided with a positioning groove 14; the positioning protrusion 13 is inserted into the positioning groove 14 to form a mutual limit, which is conducive to accurate positioning during assembly and improves assembly efficiency.

[0043] like Figure 3As shown, in an optional embodiment, the circuit breaker 100 further includes a first locking assembly 61. The first locking assembly 61 includes a first locking member 611 and a first mating member 612. The first locking member 611 passes through the first housing 11 and the second housing 12, with its head abutting against one of the first housing 11 and the second housing 12. The first mating member 612 is connected to and locked with the first locking member 611, and abuts against the other of the first housing 11 and the second housing 12. Thus, the first housing 11 and the second housing 12 are detachably connected through the cooperation of the first locking member 611 and the first mating member 612, making operation simple.

[0044] In a specific embodiment, the first locking member 611 can be a bolt, and the first mating member 612 can be a nut. The locking between the first housing 11 and the second housing 12 is achieved through the threaded engagement of the bolt and the nut.

[0045] like Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, there are multiple bases 10, which are arranged side by side along a first direction and are detachably connected. By setting multiple bases 10 side by side, different complex circuits can be accommodated. For example, a unidirectional circuit can use one base 10, and a two-phase circuit can use two bases 10, etc. It should be noted that when multiple bases 10 are set, each base 10 is also equipped with corresponding components such as a rotating assembly 20 and a contact assembly 30.

[0046] like Figure 4 , Figure 5 and Figure 8 As shown, in a specific embodiment, the rotating assembly 20 includes a rotating shaft block 21 and a connecting shaft block 22. Along the first direction, a connecting shaft block 22 is assembled between any two adjacent rotating shaft blocks 21. In this way, torque can be transmitted between two adjacent bases 10 through the connecting shaft block 22, so that the two adjacent rotating shaft blocks 21 rotate synchronously.

[0047] like Figure 4 As shown, in a specific embodiment, along the first direction, one of any adjacent rotating shaft block 21 and connecting shaft block 22 is provided with a limiting protrusion 201, and the other is provided with a limiting groove 202, with the limiting protrusion 201 inserted into the limiting groove 202. Thus, the mutual limiting between the limiting protrusion 201 and the groove wall of the limiting groove 202 facilitates precise assembly between the rotating shaft block 21 and the connecting shaft block 22, and enables torque transmission.

[0048] like Figure 4As shown, in a specific embodiment, the circuit breaker 100 further includes a second locking member 62, which passes through the plurality of bases 10 and locks the plurality of bases 10. Exemplarily, the second locking member 62 may be a pin, screw, etc.

[0049] In a specific embodiment, there are multiple second locking members 62, which are spaced apart to form multiple positions of connection and fixation between multiple bases 10, thereby ensuring the locking effect.

[0050] like Figure 1 and Figure 3 As shown, in a specific embodiment, the base 10 is also provided with a sealing plug 17. The sealing plug 17 is provided at the exposed positions of the first locking member 611, the second locking member 62 and the first mating member 612 on the base 10 to seal them, so as to enhance the sealing and aesthetics of the base 10.

[0051] like Figure 3 As shown, in a specific embodiment, at least one of the first housing 11 and the second housing 12 has an inwardly recessed groove 15 formed on its outwardly facing surface along a first direction. The groove 15 communicates with the outside along a second direction. Along the first direction, the grooves 15 on both sides of the circuit breaker 100 abut against the cover assembly 40 along the groove wall in the second direction. Thus, the groove 15 forms an abutment surface along the groove wall in the second direction, providing reliable positioning for the cover assembly 40 and facilitating precise assembly of the cover assembly 40.

[0052] In a specific embodiment, among the multiple bases 10, any two adjacent first housings 11 and second housings 12 are respectively provided with grooves 15, and any two adjacent first housings 11 and second housings 12 arranged opposite to each other abut against each other. At this time, any two adjacent grooves 15 are connected to form a heat dissipation gap. That is to say, when the multiple bases 10 are arranged side by side along the first direction, two adjacent bases 10 abut against each other, and the grooves 15 are provided to form a heat dissipation gap between the two adjacent abutting bases 10. When encountering high voltage or short-circuit current, the first assembly cavity 101 contains decomposed ions, which raises the temperature inside the first assembly cavity 101. The heat dissipation gap allows it to communicate with the external space, so that the heat can be dissipated to the external space and heat accumulation is avoided. At the same time, the operating mechanism 50 in the second assembly cavity can also pass through the heat dissipation gap to form a transmission connection with the connecting shaft block 22.

[0053] like Figure 5 , Figure 7 and Figure 8As shown, in a specific embodiment, the rotating assembly 20 includes a first rotating shaft 23 and a first transmission shaft 24. The first rotating shaft 23 and the first transmission shaft 24 are rotatably connected between two adjacent rotating shaft blocks 21. A connecting shaft block 22 is simultaneously sleeved on the first rotating shaft 23 and the first transmission shaft 24. The first rotating shaft 23 is located on the axis of the rotating shaft block 21 and extends along the axis. The first transmission shaft 24 is eccentrically arranged relative to the first rotating shaft 23. The operating mechanism 50 is connected to the first transmission shaft 24 and drives the first transmission shaft 24 to rotate circumferentially, thereby causing the rotating assembly 20 to rotate accordingly.

[0054] like Figure 6 and Figure 10 As shown, in a specific embodiment, the contact assembly 30 further includes a stationary contact 32. When the moving contact 31 contacts the stationary contact 32, the circuit is connected and the circuit breaker 100 is in the closed state. When the moving contact 31 moves away from the stationary contact 32, the circuit is disconnected and the circuit breaker 100 is in the open state.

[0055] like Figures 6 to 8 As shown, in a specific embodiment, the operating mechanism 50 further includes a first elastic element 53, a support base 54, a rotating base 52, a second transmission shaft 55, and a first transmission rod 56. The rotating base 52 is rotatably connected to the support base 54 and fixedly connected to the operating rod 51. One end of the support base 54 is connected to the first rotating shaft 23, and the other end is connected to the tripping assembly 72. Both ends of the second transmission shaft 55 are rotatably connected to the support base 54, and the second transmission shaft 55 is connected to the first transmission rod 56. One end of the first transmission rod 56, facing away from the second transmission shaft 55, is connected to the first transmission shaft 24. One end of the first elastic element 53 is connected to the rotating base 52, and the other end is connected to the second transmission shaft 55. When entering the closed state, the operating lever 51 is moved, causing the rotating seat 52 to rotate relative to the support seat 54. This causes the first elastic element 53 to undergo elastic deformation, which in turn pulls the second transmission shaft 55 to rotate. Consequently, the first transmission rod 56 swings, and the first transmission rod 56 drives the rotating shaft block 21 to rotate via the first transmission shaft 24. This causes the moving contact 31 to contact the stationary contact 32, thus completing the circuit. When entering the open state, the rotating seat 52 rotates in the opposite direction to the closed state. This rotation, via the first elastic element 53, drives the second transmission shaft 55 to rotate in the opposite direction. The first transmission rod 56 then swings in the opposite direction, and via the first transmission shaft 24, drives the rotating shaft block 21 to rotate in the opposite direction, causing the moving contact 31 to separate from the stationary contact 32, thus disconnecting the current.

[0056] like Figure 9As shown, in an optional embodiment, the operating mechanism 50 further includes a linkage assembly 57 connected to the second drive shaft 55. In the closed state, the tripping assembly 72 exerts a force on the end of the linkage assembly 57, causing the end of the linkage assembly 57 to abut against the rotating seat 52, supporting the rotation of the rotating seat 52, thereby keeping the moving contact 31 and the stationary contact 32 in contact. In the open state, the tripping assembly 72 does not exert force on the end of the linkage assembly 57, and the rotating seat 52 loses the support of the end of the linkage assembly 57 and resets under the elastic force of the first elastic member 53, disengaging the moving contact 31 and the stationary contact 32.

[0057] like Figure 9 As shown, in a specific embodiment, the linkage assembly 57 includes a second rotating shaft 571, a third rotating shaft 572, two spaced-apart first connecting rods 573, and a second connecting rod 574 disposed between the two first connecting rods 573. The second connecting rod 574 has a first connecting end 5741, a second connecting end 5742, and a movable end 5743. The third rotating shaft 572 is rotatably connected to the support base 54. Along the third direction, the second rotating shaft 571 is disposed on the side near the tripping assembly 72, and the third rotating shaft 572 is disposed on the side near the second transmission shaft 55. Along the second direction, the third rotating shaft 572 is disposed on the side near the operating lever 51 relative to the second rotating shaft 571. The first connecting rods 573 are rotatably connected to the second transmission shaft 55 and the second rotating shaft 571, the first connecting end 5741 is connected to the third rotating shaft 572, and the second connecting end 5742 is connected to the second rotating shaft 571.

[0058] Thus, the movable end 5743 of the second link 574 can swing relative to the second rotating shaft 571, the third rotating shaft 572, and the second transmission shaft 55. The tripping assembly 72 can apply a force to the movable end 5743 of the second link 574, so that the movable end 5743 abuts against the rotating seat 52, supporting the rotating seat 52 to maintain the contact between the moving contact 31 and the stationary contact 32.

[0059] like Figure 9 and Figure 10As shown, in a specific embodiment, the tripping assembly 72 further includes a traction rod 721, a second elastic element 722, and a transmission plate 723. The transmission plate 723 is rotatably connected to the support base 54. One end of the transmission plate 723 can abut against the traction rod 721, and the other end can abut against the movable end 5743 of the second connecting rod 574. One end of the second elastic element 722 is connected to the end of the transmission plate 723 near the traction rod 721, and the other end is connected to the support base 54. In the closed state, the traction rod 721 exerts pressure on the end of the transmission plate 723. Under this pressure, the transmission plate 723 rotates relative to the support seat 54, causing the second elastic element 722 to deform. The end of the transmission plate 723 near the second connecting rod 574 abuts against the movable end 5743, providing support for the movable end 5743. This allows the movable end 5743 to also abut against the rotating seat 52 under the force of the transmission plate 723, thus supporting the rotating seat 52 and maintaining contact between the moving contact 31 and the stationary contact 32. During the opening process, the traction rod 721 rotates to release the pressure on the transmission plate 723. The transmission plate 723 resets under the action of the second elastic element 722, releasing its support for the movable end 5743. This causes the movable end 5743 to no longer support the rotating seat 52, the rotating seat 52 resets, the moving contact 31 and the stationary contact 32 disengage, and the circuit is broken.

[0060] In a specific embodiment, the trigger component 71 is provided with a bimetallic strip. When the current is short-circuited, the bimetallic strip is heated and deformed, which in turn pushes the traction rod 721 to rotate, so that the circuit breaker 100 is tripped.

[0061] In an optional embodiment, the circuit breaker 100 further includes an arc-extinguishing assembly 80, which is disposed in the first assembly cavity 101 and located on the side of the contact assembly 30 opposite to the rotating assembly 20; the arc-extinguishing assembly 80 forms an arc-extinguishing channel extending in a third direction. Thus, when a current short circuit occurs, the circuit breaker 100 trips, the stationary contact 32 and the moving contact 31 separate, and the arc generated by the separation of the stationary contact 32 and the moving contact 31 enters the arc-extinguishing assembly 80, extinguishing the arc.

[0062] In a specific embodiment, the arc extinguishing component 80 is provided with grid plates spaced apart along the first direction. When the electric arc enters the grid plates, the electric arc is divided into multiple short arc segments. By utilizing the near-cathode effect of the AC electric arc, the electric arc is extinguished when the current crosses zero.

[0063] like Figure 3 and Figure 6 As shown, in a specific embodiment, along the third direction, the first housing 11 and the second housing 12 surround the arc extinguishing channel to form an assembly port 16. A wire mesh 90 is installed at the assembly port 16. The wire mesh 90 can further filter and disperse the electric arc, prevent the electric arc from being ejected, and protect the safety of operators and equipment.

[0064] like Figure 1 and Figure 2 As shown, in a specific embodiment, the cover assembly 40 includes a cover 41 and a cover plate 42 connected to the cover 41. The cover 41 is connected to the base 10, and the cover plate 42 has an opening 401. The cover 41 and the cover plate 42 can be processed separately, which helps to improve production efficiency. During assembly, the cover plate 42 is first fixed to the base 10, and then the cover plate 42 is placed on the cover 41.

[0065] In a specific embodiment, the first elastic element 53 and the second elastic element 722 can be springs.

[0066] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A circuit breaker characterized by, include: The base (10) is provided with a first housing (11) and a second housing (12), the first housing (11) and the second housing (12) are detachably connected, the first housing (11) and the second housing (12) are arranged opposite to each other along a first direction and surround to form a first assembly cavity (101); along the first direction, the first housing (11) is provided with a first assembly hole (111), the second housing (12) is provided with a second assembly hole (121), the first assembly hole (111) and the second assembly hole (121) are arranged opposite to each other and communicate with the first assembly cavity (101); A rotating assembly (20) is inserted through and installed in the first mounting hole (111) and the second mounting hole (121); A contact assembly (30) is installed in the first assembly cavity (101); the contact assembly (30) includes a movable contact (31), which is connected to the rotating assembly (20); A cover assembly (40) is disposed on the base (10) along the second direction and forms a second assembly cavity with the base (10). The cover assembly (40) is provided with an opening (401) communicating with the second assembly cavity. An operating mechanism (50) is installed in the second assembly cavity, and the operating mechanism (50) is provided with an operating rod (51). The operating rod (51) extends out of the second assembly cavity from the opening (401) along a third direction. The operating rod (51) and the rotating component (20) are spaced apart. The operating mechanism (50) and the rotating component (20) are connected in a transmission manner. The instantaneous tripping mechanism (70) is provided with a triggering component (71) and a tripping component (72). The triggering component (71) is located in the first assembly cavity (101), and the tripping component (72) is located in the second assembly cavity and connected to the operating mechanism (50). The triggering component (71) can extend from the first assembly cavity (101) and trigger the tripping component (72) to move.

2. The circuit breaker of claim 1, wherein, Along the first direction, one of the first housing (11) and the second housing (12) is provided with a positioning protrusion (13), and the other is provided with a positioning groove (14); the positioning protrusion (13) is inserted into the positioning groove (14).

3. The circuit breaker of claim 1, wherein, The circuit breaker further includes a first locking assembly (61), which includes a first locking member (611) and a first mating member (612). The first locking member (611) passes through the first housing (11) and the second housing (12). The head of the first locking member (611) abuts against one of the first housing (11) and the second housing (12). The first mating member (612) is connected to and locked with the first locking member (611). The first mating member (612) abuts against the other of the first housing (11) and the second housing (12).

4. The circuit breaker of claim 1, wherein, The number of bases (10) is provided in multiples, and the multiple bases (10) are arranged side by side along the first direction and are detachably connected.

5. The circuit breaker of claim 4, wherein, The rotating assembly (20) includes a rotating shaft block (21) and a connecting shaft block (22). Along the first direction, the connecting shaft block (22) is assembled between any two adjacent rotating shaft blocks (21).

6. The circuit breaker of claim 5, wherein, Along the first direction, one of any adjacent rotating shaft block (21) and connecting shaft block (22) is provided with a limiting protrusion (201), and the other is provided with a limiting groove (202), with the limiting protrusion (201) inserted into the limiting groove (202).

7. The circuit breaker of claim 4, wherein, The circuit breaker also includes a second locking member (62) which passes through the plurality of bases (10) and locks the plurality of bases (10).

8. The circuit breaker of claim 4, wherein, At least one of the first housing (11) and the second housing (12) has an inwardly recessed groove (15) on its outward surface along the first direction, and the groove (15) communicates with the outside along the second direction; along the first direction, the grooves (15) on both sides of the circuit breaker abut against the cover assembly (40) along the groove wall in the second direction.

9. The circuit breaker of claim 8, wherein, In the plurality of bases (10), any two adjacent first housings (11) and second housings (12) are respectively provided with the grooves (15), any two adjacent first housings (11) and second housings (12) arranged opposite to each other abut each other, and any two adjacent grooves (15) are connected to form a heat dissipation gap.

10. The circuit breaker of claim 1, wherein, The circuit breaker further includes an arc extinguishing assembly (80), which is disposed in the first assembly cavity (101) and located on the side of the contact assembly (30) opposite to the rotating assembly (20); the arc extinguishing assembly (80) forms an arc extinguishing channel extending along the third direction; Along the third direction, on both sides of the arc extinguishing channel, the first housing (11) and the second housing (12) surround and form an assembly port (16), at which a wire mesh (90) is assembled.

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