Circuit breaker

Abstract

The circuit breaker comprises a shell, an operating mechanism, a contact assembly and an arc extinguishing assembly, the operating mechanism and the contact assembly are sequentially arranged in the first direction and arranged in a linkage mode, and the arc extinguishing assembly is arranged on one side of the operating mechanism and the contact assembly in the second direction; the operating mechanism comprises a driving assembly, a connecting rod assembly and a tripping assembly, the driving assembly and the connecting rod assembly are sequentially arranged in the second direction, the driving assembly drives the contact assembly to be switched between the closing state and the opening state through the connecting rod assembly, the tripping assembly and the connecting rod assembly are sequentially arranged in the first direction, and the tripping assembly is in driving connection with the connecting rod assembly; in the locking state, the driving assembly can drive the contact assembly to be switched between the switching-on state and the switching-off state, and in the tripping state, the contact assembly is kept in the switching-off state. According to the circuit breaker, under the condition that normal functions of the circuit breaker are guaranteed, the structure and the position of the operating mechanism in the circuit breaker are reasonably arranged, and the internal space of the circuit breaker is reasonably distributed.

Description

Technical Field

[0001] The present application belongs to the technical field of electrical equipment, and in particular relates to a circuit breaker. Background Art

[0002] In the market, the overall size of small molded case circuit breakers is small, and an operating mechanism, a contact structure and an arc extinguishing structure need to be set inside to realize the opening and closing of the circuit breaker through the cooperation of the operating mechanism and the contact structure, and to realize the arc extinguishing function after the contact structure is disconnected through the arc extinguishing structure.

[0003] At present, inside the circuit breaker, the operating mechanism is used to link the operating handle and the contact structure. In order to realize the opening and closing functions of the circuit breaker, the overall structure of the operating mechanism is relatively complex and usually needs to occupy most of the space inside the circuit breaker. This squeezes the setting space of the arc extinguishing structure, resulting in insufficient capacity of the arc extinguishing structure and the inability to reasonably allocate the internal space of the circuit breaker. Utility Model Content

[0004] The present application provides a circuit breaker, wherein the internal operating mechanism is reasonably arranged in structure and position while ensuring the normal function of the circuit breaker, thereby ensuring the arrangement space of the contact structure and the arc extinguishing structure, and reasonably allocating the internal space of the circuit breaker.

[0005] The present application provides a circuit breaker, which includes a shell and an operating mechanism, a contact assembly and an arc extinguishing assembly arranged in the shell. The operating mechanism and the contact assembly are arranged in sequence along a first direction and are linked together. The arc extinguishing assembly is arranged on one side of the operating mechanism and the contact assembly along a second direction; the operating mechanism includes a driving assembly, a connecting rod assembly and a tripping assembly. The driving assembly and the connecting rod assembly are arranged in sequence along the second direction, and the driving assembly drives the contact assembly to switch between a closed state and an open state through the connecting rod assembly. The tripping assembly and the connecting rod assembly are arranged in sequence along the first direction, the tripping assembly is drivingly connected to the connecting rod assembly, and the tripping assembly has a locked state and a tripped state; in the locked state, the driving assembly can drive the contact assembly to switch between a closed state and an open state, and in the tripped state, the contact assembly remains in an open state.

[0006] As for the circuit breaker as above, the trip assembly includes a trip structure and a locking structure, the trip structure includes a trip mounting plate and a trip limiting part, a trip protrusion and a trip fixing part installed on the trip mounting plate, the trip structure is rotatably connected to the shell through the trip fixing part, the trip protrusion is a cylindrical structure, and is rotatably connected to the connecting rod assembly, the trip limiting part includes a trip overlapping part; the locking structure includes a first overlapping part, the first overlapping part is protruded toward the trip structure, and the first overlapping part is positioned opposite to the trip overlapping part; in the locked state, the trip overlapping part overlaps the first overlapping part, and in the tripped state, the trip overlapping part is separated from the first overlapping part and is abutted against the top surface of the locking structure.

[0007] As for the circuit breaker as above, the trip assembly further includes a traction structure, which is rotatably arranged in the shell, and the traction structure includes a protruding traction overlap portion; the locking structure further includes a recessed second overlap portion, and the second overlap portion is arranged relative to the traction overlap portion; in the tripped state, the traction overlap portion overlaps the second overlap portion, and in the locked state, the traction overlap portion is separated from the second overlap portion and abuts against the bottom surface of the locking structure.

[0008] As shown in the circuit breaker above, the tripping structure includes two parallel tripping mounting plates, which are installed on both sides of the connecting rod assembly in the third direction. The two tripping mounting plates are fixedly connected by a tripping limiting portion, and each tripping mounting plate has a tripping protrusion and a tripping fixing portion.

[0009] As for the circuit breaker as above, the two tripping fixing parts are hole-shaped structures positioned opposite to each other, and the tripping structure also includes a tripping fixing shaft, which is rotatably inserted into the two tripping fixing parts; the driving assembly includes a connected driving handle and a driving lever, the driving lever is a cover structure covered on the outside of the tripping structure, and the driving lever has a first limiting groove with an arc structure, and the first limiting groove is slidably mounted on the end of the tripping fixing shaft; in the open state, the tripping fixing shaft is against the first end of the first limiting groove, and in the closed state, the tripping fixing shaft is against the second end of the first limiting groove.

[0010] As for the circuit breaker as above, the tripping structure also includes a tripping limit shaft, which passes through the tripping mounting plate along the third direction and is rotatably connected to the tripping mounting plate; the operating mechanism also includes a bracket structure, which is a cover structure arranged on the outside of the tripping structure, and the bracket structure has a second limit groove with an arc structure, the second limit groove is arranged to avoid the driving component, and the tripping limit shaft is slidably arranged in the second limit groove; in the locked state, the tripping limit shaft is abutted against the first end of the second limit groove, and in the tripping state, the tripping limit shaft is abutted against the second end of the second limit groove.

[0011] As for the circuit breaker as above, the traction structure also includes a traction rod, which is rotatably arranged in the shell, the first end of the traction rod is a traction drive part, the traction rod is driven and connected to the circuit breaker's release through the traction drive part, and the second end of the traction rod is provided with a traction hinge, which is rotatably connected to the traction overlap part through the traction hinge.

[0012] As shown in the above circuit breaker, the connecting rod assembly includes an upper connecting rod and a lower connecting rod that are rotatably connected to each other. The upper connecting rod includes a recessed rotation groove and a protruding limit boss. The rotation groove is provided at one end of the upper connecting rod away from the lower connecting rod. The upper connecting rod is rotatably connected to the tripping protrusion through the rotation groove. The limit boss is provided in the middle of the upper connecting rod and is arranged opposite to the tripping fixing part. The end of the lower connecting rod away from the upper connecting rod is rotatably connected to the contact assembly.

[0013] As for the circuit breaker above, the upper connecting rod includes two first connecting rod parts arranged in parallel, the two first connecting rod parts are connected by a first connecting part, each first connecting rod part has a rotation groove and a limiting boss, and the lower connecting rod includes two second connecting rod parts arranged in parallel, the two second connecting rod parts are connected by a second connecting part; the connecting rod assembly also includes a connecting rod hinge shaft extending along the third direction, and the upper connecting rod and the lower connecting rod are rotatably connected through the connecting rod hinge shaft.

[0014] In the circuit breaker as above, the driving assembly includes a driving handle, a driving lever and a first elastic member connected to each other, one end of the first elastic member is connected to the driving lever, and the other end is connected to the connecting rod hinge shaft.

[0015] The circuit breaker of the present application includes a housing and an operating mechanism, a contact assembly, and an arc extinguishing assembly arranged in the housing. The operating mechanism is used to operate the contact assembly's closing and opening and tripping states, and the arc extinguishing assembly can extinguish the arc formed by the opening of the contact assembly. The operating mechanism includes a drive assembly, a connecting rod assembly, and a trip assembly. The drive assembly drives the contact assembly to switch between the closing state and the opening state through the connecting rod assembly. The trip assembly is driven and connected to the connecting rod assembly, and the trip assembly has a locked state and a tripped state. In the locked state, the drive assembly can drive the contact assembly to switch between the closing state and the opening state. In the tripped state, the contact assembly remains in the opening state. Therefore, under the linkage action of the drive assembly, the connecting rod assembly, and the trip assembly, the circuit breaker can switch between the closing state and the opening state, and can switch between the locked state and the tripped state, thereby ensuring the normal function of the circuit breaker.

[0016] On this basis, the circuit breaker's drive assembly and connecting rod assembly are arranged sequentially along the second direction, and the trip assembly and connecting rod assembly are arranged sequentially along the first direction, thereby forming the overall structure of the operating mechanism. The operating mechanism as a whole and the contact assembly are arranged sequentially and linked in the first direction. The arc extinguishing assembly is arranged on one side of the operating mechanism and the contact assembly along the second direction. This positional arrangement rationally utilizes the space between the angle between the contact assembly and the arc extinguishing assembly. The operating mechanism is arranged within this space without affecting the extension of the arc extinguishing assembly in the first direction, ensuring that the arc extinguishing assembly has sufficient arc extinguishing capacity. Therefore, the operating mechanism inside the circuit breaker is rationally arranged in structure and position, ensuring the installation space of the contact assembly and the arc extinguishing assembly, and rationally allocating the internal space of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 This is a schematic diagram of the contact assembly of the circuit breaker according to an embodiment of the present application when it is open;

[0019] Figure 2 This is a schematic diagram of the contact assembly of the circuit breaker according to an embodiment of the present application when it is closed;

[0020] Figure 3 This is a schematic diagram of a circuit breaker in a locked state according to an embodiment of the present application;

[0021] Figure 4 A schematic diagram of the cooperation between the operating mechanism and the contact assembly of the circuit breaker according to an embodiment of the present application;

[0022] Figure 5 This is a schematic structural diagram of a tripping structure of a circuit breaker according to an embodiment of the present application;

[0023] Figure 6 This is a schematic structural diagram of a traction structure of a circuit breaker according to an embodiment of the present application;

[0024] Figure 7 This is a schematic structural diagram of a connecting rod assembly of a circuit breaker according to an embodiment of the present application;

[0025] Figure 8 This is a schematic structural diagram of a locking structure of a circuit breaker according to an embodiment of the present application;

[0026] Figure 9 This is a schematic diagram of the cooperation between the driving lever and the bracket structure of the circuit breaker according to an embodiment of the present application;

[0027] Figure 10 A schematic diagram of a circuit breaker in a tripped state according to an embodiment of the present application;

[0028] Figure 11 A schematic diagram of a multi-pole structure of a circuit breaker according to an embodiment of the present application;

[0029] Figure 12 This is a schematic structural diagram of the inter-pole linkage of the circuit breaker according to an embodiment of the present application.

[0030] Description of Figure Numbers:

[0031] 10. Driving assembly; 11. Driving handle; 12. Driving lever; 13. First elastic member; 121. First limiting groove; 20. Connecting rod assembly; 21. Upper connecting rod; 211. Rotating groove; 212. Limiting boss; 213. First connecting rod portion; 214. First connecting portion; 22. Lower connecting rod; 221. Second connecting rod portion; 222. Second connecting portion; 23. Connecting rod hinge shaft; 30. Tripping assembly; 31. Tripping structure; 311. Tripping limiting portion; 312. Tripping boss Starting portion; 313, jumper fixing portion; 314, jumper overlapping portion; 315, jumper mounting plate; 316, jumper fixing shaft; 317, jumper limiting shaft; 32, lock structure; 321, first overlapping portion; 322, second overlapping portion; 33, traction structure; 331, traction overlapping portion; 332, traction rod; 333, traction hinge; 334, traction drive portion; 40, bracket structure; 41, second limiting groove; 42, limiting plate; 43, bracket round table; 50, release;

[0032] 100, housing; 200, operating mechanism; 300, contact assembly; 310, moving contact; 320, static contact; 400, arc extinguishing assembly; 500, inter-pole linkage; 510, rotating shaft boss; 520, rotating shaft groove;

[0033] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0034] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present application by illustrating the examples of the present application.

[0035] like Figures 1 to 12As shown, the embodiment of the present application provides a circuit breaker, which includes a housing 100 and an operating mechanism 200, a contact assembly 300 and an arc extinguishing assembly 400 arranged in the housing 100. The operating mechanism 200 and the contact assembly 300 are arranged in sequence along a first direction X and are linked together. The arc extinguishing assembly 400 is arranged on one side of the operating mechanism 200 and the contact assembly 300 along a second direction Y. The operating mechanism 200 includes a drive assembly 10, a connecting rod assembly 20 and a trip assembly 30. The drive assembly 10 and the connecting rod assembly 20 are arranged in sequence along a first direction X and are linked together. The contact assembly 300 is arranged sequentially along the second direction Y, and the driving assembly 10 drives the contact assembly 300 to switch between the closed state and the open state through the connecting rod assembly 20. The tripping assembly 30 and the connecting rod assembly 20 are arranged sequentially along the first direction X. The tripping assembly 30 is driven and connected to the connecting rod assembly 20, and the tripping assembly 30 has a locked state and a tripped state; in the locked state, the driving assembly 10 can drive the contact assembly 300 to switch between the closed state and the open state, and in the tripped state, the contact assembly 300 remains in the open state.

[0036] In a specific implementation, the circuit breaker of the embodiment of the present application includes a housing 100 and an operating mechanism 200, a contact assembly 300, and an arc extinguishing assembly 400 disposed within the housing 100. The operating mechanism 200 is used to operate the contact assembly 300 between opening, closing, and tripping states, and the arc extinguishing assembly 400 is capable of extinguishing the arc formed by the opening of the contact assembly 300. The operating mechanism 200 includes a drive assembly 10, a connecting rod assembly 20, and a tripping assembly 30. The drive assembly 10 drives the contact assembly 300 to switch between the closed state and the open state via the connecting rod assembly 20. The tripping assembly 30 is drivingly connected to the connecting rod assembly 20, and the tripping assembly 30 has a locked state and a tripped state. In the locked state, the drive assembly 10 can drive the contact assembly 300 to switch between the closed state and the open state. In the tripped state, the contact assembly 300 remains in the open state. Therefore, under the linkage action of the drive assembly 10, the connecting rod assembly 20 and the trip assembly 30, the circuit breaker can switch between the closed state and the open state, and can switch between the locked state and the tripped state, ensuring the normal function of the circuit breaker.

[0037] It should be noted that when the circuit breaker fails or needs to be inspected, the tripper 50 can trigger the trip assembly 30, causing the trip assembly 30 to switch to the tripped state, so that the contact assembly 300 can only be in the open state. The setting of the tripped state avoids the operator from mistakenly operating the drive assembly 10 when the circuit breaker fails or is being inspected, causing the contact assembly 300 to close, causing personnel safety problems or further failures of the circuit breaker; when the circuit breaker is working normally, the trip assembly 30 can be kept in the locked state, so that the operator can operate the drive assembly 10 to switch the contact assembly 300 between the closed state and the open state to complete the conduction or disconnection of the circuit breaker to the entire circuit.

[0038] On this basis, the circuit breaker's drive assembly 10 and connecting rod assembly 20 are sequentially arranged along the second direction Y, and the trip assembly 30 and connecting rod assembly 20 are sequentially arranged along the first direction X, thereby forming the overall structure of the operating mechanism 200. The operating mechanism 200 and the contact assembly 300 are sequentially arranged and interlocked along the first direction X. The arc extinguishing assembly 400 is positioned to one side of the operating mechanism 200 and the contact assembly 300 along the second direction Y. This positioning arrangement rationally utilizes the space formed by the angle between the contact assembly 300 and the arc extinguishing assembly 400. The operating mechanism 200 is positioned within this space without affecting the extension of the arc extinguishing assembly 400 in the first direction X, ensuring that the arc extinguishing assembly 400 has sufficient arc extinguishing capacity. Therefore, the operating mechanism 200 within the circuit breaker is rationally arranged in structure and position, ensuring sufficient space for the contact assembly 300 and the arc extinguishing assembly 400, and thus reasonably allocating the internal space of the circuit breaker.

[0039] Specifically, if Figure 1 and Figure 2 As shown, the contact assembly 300 includes a movable contact 310 and a stationary contact 320. The movable contact 310 is rotatably arranged. When the movable contact 310 rotates to contact the stationary contact 320, the circuit breaker is in the closed state. When the movable contact 310 rotates to separate from the stationary contact 320, the circuit breaker is in the open state. The connecting rod assembly 20 is connected to the movable contact 310 and can drive the movable contact 310 to rotate.

[0040] like Figure 5 As shown, the circuit breaker of the embodiment of the present application, wherein the trip assembly 30 includes a trip structure 31 and a locking structure 32, the trip structure 31 includes a trip mounting plate 315 and a trip limiter 311, a trip protrusion 312 and a trip fixing portion 313 mounted on the trip mounting plate 315, the trip structure 31 is rotatably connected to the housing 100 through the trip fixing portion 313, the trip protrusion 312 is a cylindrical structure, and is rotatably connected to the connecting rod assembly 20, The trip latch limiting portion 311 includes a trip latch overlapping portion 314; the locking structure 32 includes a first overlapping portion 321, which protrudes toward the trip latch structure 31, and the first overlapping portion 321 is arranged relative to the trip latch overlapping portion 314; in the locked state, the trip latch overlapping portion 314 overlaps the first overlapping portion 321, and in the released state, the trip latch overlapping portion 314 is separated from the first overlapping portion 321 and is abutted against the top surface of the locking structure 32.

[0041] During specific implementation, the trip structure 31 can be rotatably connected to the shell 100 through the trip fixing portion 313, so that the trip lap portion 314 can rotate with the trip fixing portion 313 as the rotation center, so that it can be overlapped with the first lap portion 321, or separated from the first lap portion 321 and abutted against the top surface of the locking structure 32, and the trip assembly 30 completes the conversion between the locked state and the tripped state.

[0042] During the rotation of the tripping structure 31, the connecting rod assembly 20 can always be placed on the tripping protrusion 312 of the cylindrical structure and always rotate around the circumferential surface of the tripping protrusion 312, thereby realizing the conversion of the driving contact assembly 300 between the closed state and the open state.

[0043] Specifically, the trip limit portion 311, the trip protrusion 312 and the trip fixing portion 313 are arranged in a triangular shape on the trip mounting plate 315. In the second direction Y, the trip protrusion 312 is arranged between the trip limit portion 311 and the trip fixing portion 313. Such position distribution makes the three relatively stable after being fixed or installed with the corresponding components, and there is sufficient space between them. Whether it is the rotation of the trip structure 31 itself, the overlap between the trip structure 31 and the locking structure 32 or the rotation of the connecting rod assembly 20, there will be no impact on the operation, and the circuit breaker can normally complete the opening, closing, locking and tripping actions.

[0044] like Figure 6 As shown, the circuit breaker of the embodiment of the present application, wherein the trip assembly 30 further includes a traction structure 33, which is rotatably arranged in the housing 100, and the traction structure 33 includes a protruding traction overlap portion 331; the locking structure 32 further includes a recessed second overlap portion 322, and the second overlap portion 322 is arranged relative to the traction overlap portion 331; in the tripped state, the traction overlap portion 331 overlaps the second overlap portion 322, and in the locked state, the traction overlap portion 331 is separated from the second overlap portion 322 and abuts against the bottom surface of the locking structure 32.

[0045] When the traction structure 33 is specifically implemented, the rotation of the traction overlap portion 331 can cause the traction overlap portion 331 to be displaced. In the tripped state, the traction overlap portion 331 overlaps the second overlap portion 322, so that the traction overlap portion 331 and the second overlap portion 322 cooperate. When the direction of external force is inaccurate, the traction overlap portion 331 cannot be separated from the second overlap portion 322, and the trip assembly 30 always remains in the tripped state. At this time, the jumper overlap portion 314 also abuts against the top surface of the locking structure 32 and cannot be relatively displaced. In the locked state, the traction overlap portion 331 is separated from the second overlap portion 322. The part 322 is arranged against the bottom surface of the locking structure 32. At this time, the thrust of the pulling overlap part 331 can keep the locking structure 32 in the current position. At this position, the first overlap part 321 of the locking structure 32 is overlapped with the tripping overlap part 314, and the tripping assembly 30 can remain in a locked state. At this time, no matter how the connecting rod assembly 20 rotates and moves, the tripping assembly 30 will not move. The connecting rod assembly 20 rotates around the fixed tripping protrusion 312, thereby realizing the driving of the contact assembly 300, and the circuit breaker can be freely opened and closed.

[0046] Specifically, the locking structure 32 is formed by three connecting plates connected vertically in sequence, and the first overlap portion 321 and the second overlap portion 322 are both arranged on the top connection portion of the locking structure 32; when the trip assembly 30 is locked, the middle vertical connecting plate can also play a limiting role on the trip overlap portion 314.

[0047] like Figure 5 As shown, the circuit breaker of the embodiment of the present application, wherein the tripping structure 31 includes two parallel tripping mounting plates 315, the two tripping mounting plates 315 are installed on both sides of the connecting rod assembly 20 in the third direction Z, the two tripping mounting plates 315 are fixedly connected by a tripping limiting portion 311, and each tripping mounting plate 315 has a tripping protrusion 312 and a tripping fixing portion 313.

[0048] In specific implementation, the two parallel tripping mounting plates 315 of the tripping structure 31 are respectively mounted on either side of the connecting rod assembly 20 in the third direction Z. When the connecting rod assembly 20 is fixed, it can simultaneously engage with the tripping protrusions 312 on both sides of the tripping mounting plates 315. This improves the rotational stability of the connecting rod assembly 20 and prevents it from falling off the tripping protrusions 312, ensuring the stability of the circuit breaker opening and closing. The design of the two tripping fixing portions 313 also allows the tripping structure 31 to be rotationally fixed to the housing 100 on both sides, improving the installation stability of the tripping structure 31 within the housing 100.

[0049] In the circuit breaker of the embodiment of the present application, the two tripping fixing parts 313 are hole-shaped structures positioned opposite to each other, and the tripping structure 31 also includes a tripping fixing shaft 316, which is rotatably inserted into the two tripping fixing parts 313; the driving assembly 10 includes a connected driving handle 11 and a driving lever 12, and the driving lever 12 is a cover structure covered on the outside of the tripping structure 31, and the driving lever 12 has a first limiting groove 121 with an arc structure, and the first limiting groove 121 is slidably sleeved on the end of the tripping fixing shaft 316; in the open state, the tripping fixing shaft 316 is abutted against the first end of the first limiting groove 121, and in the closed state, the tripping fixing shaft 316 is abutted against the second end of the first limiting groove 121.

[0050] In specific implementation, the trip latch fixing shaft 316 can be respectively passed through the two hole-shaped trip latch fixing parts 313, so that the entire trip latch structure 31 can rotate around the trip latch fixing shaft 316 to achieve the conversion between the locked state and the tripped state, and the trip latch fixing shaft 316 can be fixed to the shell 100, so that the trip latch mounting plate 315 can be rotatably connected to the shell 100.

[0051] The driving assembly 10 includes a driving handle 11 and a driving lever 12 connected to each other, wherein the driving handle 11 can be manually operated by the operator. After the operator operates the driving handle 11, the driving handle 11 can drive the driving lever 12 to move. Since the driving lever 12 is covered on the outside of the tripping structure 31 and has a first limiting groove 121 with an arc structure, the first limiting groove 121 is sleeved on the end of the tripping fixed shaft 316, when the driving lever 12 moves, under the limiting action of the tripping fixed shaft 316, the driving lever 12 can slide along the arc extension direction of its first limiting groove 121, and through the limitation of the two ends of the first limiting groove 121, during the rotation of the driving lever 12, the tripping fixed shaft 316 will respectively abut against the two ends of the first limiting groove 121, so that the contact assembly 300 is in the closed state and the open state, preventing the moving contact 310 from continuing to move.

[0052] In the circuit breaker of the embodiment of the present application, the tripping structure 31 also includes a tripping limit shaft 317, which passes through the tripping mounting plate 315 along the third direction Z and is rotatably connected to the tripping mounting plate 315; the operating mechanism 200 also includes a bracket structure 40, which is a cover structure arranged on the outside of the tripping structure 31, and the bracket structure 40 has a second limit groove 41 with an arc structure, and the second limit groove 41 is arranged to avoid the drive assembly 10, and the tripping limit shaft 317 is slidably arranged in the second limit groove 41; in the locked state, the tripping limit shaft 317 is abutted against the first end of the second limit groove 41, and in the tripped state, the tripping limit shaft 317 is abutted against the second end of the second limit groove 41.

[0053] When the latch 31 is in the state of rotation and the latch 31 is in the state of rotation, the first latch 31 is in the state of rotation and the second latch 31 is in the state of rotation. The two sides of the structure 31 are respectively limited by the first end of the second limiting groove 41 and the first overlapping portion 321, and the tripping assembly 30 is in a locked state; when the tripping limiting shaft 317 reaches and abuts against the second end of the second limiting groove 41, the tripping structure 31 as a whole will not continue to rotate, and at this time the tripping overlapping portion 314 of the tripping structure 31 abuts against the top surface of the locking structure 32, so the two sides of the tripping structure 31 are respectively limited by the second end of the second limiting groove 41 and the top surface of the locking structure 32, and the tripping assembly 30 is in a tripping state.

[0054] Therefore, the provision of the second limiting groove 41 limits the movement trajectory of the tripping structure 31 and enables the tripping structure 31 to be fixed in the locked position and the tripped position, so that the circuit breaker as a whole can be stably in the locked state and the tripped state.

[0055] Specifically, the support structure 40 of the cover body is arranged between the driving lever 12 and the tripping structure 31, and is stacked with the driving lever 12 which is also a cover body structure. The support structure 40 has a limit plate 42 on its side wall perpendicular to the third direction Z. The limit plate 42 is arranged parallel to the side wall of the support structure 40 and is connected through a connecting structure. The driving lever 12 rotates between the limit plate 42 and the side wall of the support structure 40. The setting of the limit plate 42 limits the movement of the driving lever 12 in the third direction Z, thereby avoiding a large offset of the driving lever 12 in the third direction Z, which affects the opening and closing operations of the circuit breaker.

[0056] The bracket structure 40 also has a bracket cone 43 protruding from its side wall, and the driving lever 12 is correspondingly provided with a circular recess at the same position. The driving lever 12 can be clamped on the outer peripheral surface of the bracket cone 43 through its circular recess and rotate around the outer peripheral surface of the bracket cone 43. The setting of the bracket cone 43 plays a supporting role in the rotation of the driving lever 12.

[0057] like Figure 6As shown, the circuit breaker of the embodiment of the present application, wherein the traction structure 33 also includes a traction rod 332, the traction rod 332 is rotatably arranged in the shell 100, the first end of the traction rod 332 is a traction drive part 334, the traction rod 332 is driven and connected to the circuit breaker's release 50 through the traction drive part 334, the second end of the traction rod 332 is provided with a traction hinge 333, the traction rod 332 is rotatably connected to the traction overlap part 331 through the traction hinge 333.

[0058] In practice, the release 50 drives the traction drive portion 334, causing the traction rod 332 to rotate, thereby driving the traction overlap portion 331 to rotate. This causes the traction overlap portion 331 to transition from abutting the bottom surface of the locking structure 32 to overlapping the second overlap portion 322, thereby transitioning the circuit breaker from a locked state to a tripped state. The provision of the traction hinge 333 enables the traction overlap portion 331 to rotate relative to the traction rod 332. During the rotation of the traction rod 332, the traction overlap portion 331 rotates slightly, preventing stress-induced breakage of the traction overlap portion 331.

[0059] It should be noted that, in the tripped state, the driving handle 11 of the driving assembly 10 is in the middle position between the opening and closing states. At this time, the use of the tripper 50 cannot rotate the traction rod 332, and the circuit breaker cannot be converted from the tripped state to the locked state. Therefore, when the circuit breaker is in the tripped state, it is necessary to rotate the driving handle 11 so that the connecting rod assembly 20 drives the tripping assembly 30 to move, so that the traction overlap portion 331 moves to the bottom surface of the locking structure 32, and the trip overlap portion 314 overlaps with the first overlap portion 321, so that the circuit breaker as a whole can be restored to the opening state in the locked state.

[0060] like Figure 7 As shown, a circuit breaker of an embodiment of the present application, wherein the connecting rod assembly 20 includes an upper connecting rod 21 and a lower connecting rod 22 that are rotatably connected to each other, the upper connecting rod 21 includes a recessed rotation groove 211 and a protruding limiting boss 212, the rotation groove 211 is provided at one end of the upper connecting rod 21 away from the lower connecting rod 22, the upper connecting rod 21 is rotatably connected to the tripping protrusion 312 through the rotation groove 211, the limiting boss 212 is provided in the middle of the upper connecting rod 21 and is arranged opposite to the tripping fixing portion 313, and the end of the lower connecting rod 22 away from the upper connecting rod 21 is rotatably connected to the contact assembly 300.

[0061] During specific implementation, the upper connecting rod 21 and the lower connecting rod 22 of the connecting rod assembly 20 are rotatably connected. When the driving assembly 10 drives the connecting rod assembly 20, the lower connecting rod 22 can drive the contact assembly 300 to rotate, and relative rotation will occur between the upper connecting rod 21 and the lower connecting rod 22. The upper connecting rod 21 rotates around the tripping protrusion 312 through the rotating groove 211. When the upper connecting rod 21 rotates to the closed state, its limiting boss 212 abuts against the tripping fixing portion 313, thereby limiting the upper connecting rod 21 and the lower connecting rod 22 connected thereto, preventing the moving contact 310 from continuing to rotate in the closed state.

[0062] like Figure 7 As shown, a circuit breaker of an embodiment of the present application, wherein the upper connecting rod 21 includes two first connecting rod portions 213 arranged in parallel, the two first connecting rod portions 213 are connected by a first connecting portion 214, each first connecting rod portion 213 has a rotation groove 211 and a limiting boss 212, the lower connecting rod 22 includes two second connecting rod portions 221 arranged in parallel, the two second connecting rod portions 221 are connected by a second connecting portion 222; the connecting rod assembly 20 also includes a connecting rod hinge shaft 23 extending along a third direction Z, and the upper connecting rod 21 and the lower connecting rod 22 are rotatably connected through the connecting rod hinge shaft 23.

[0063] During specific implementation, the two parallel first link portions 213 of the upper link 21 can make the upper link 21 stable in rotation and abutment. When the upper link 21 is rotationally connected to the jump-lock protrusion 312, the two rotation grooves 211 support its rotation. Moreover, the upper link 21 and the lower link 22 are rotationally connected through the link hinge shaft 23. The link hinge shaft 23 is respectively passed through the two first link portions 213 and the two second link portions 221, so that the rotation connection between the upper link 21 and the lower link 22 is also stable.

[0064] like Figure 3 As shown, the circuit breaker of an embodiment of the present application, wherein the driving assembly 10 includes a driving handle 11, a driving lever 12 and a first elastic member 13 connected to each other, one end of the first elastic member 13 is connected to the driving lever 12, and the other end is connected to the connecting rod hinge shaft 23.

[0065] During specific implementation, when the driving handle 11 drives the driving lever 12 to rotate, the first elastic member 13 moves under the drive of the driving lever 12, thereby driving the connecting rod hinge shaft 23 to move, and then causing the upper connecting rod 21 and the lower connecting rod 22 to rotate together, thereby realizing the opening and closing of the circuit breaker contact assembly 300.

[0066] It should be noted that the overall operation process of the circuit breaker is as follows:

[0067] In the locked state, during the closing operation, the driving handle 11 is rotated clockwise, and the driving lever 12 can drive the connecting rod hinge shaft 23 to move through the first elastic member 13. The movement of the connecting rod hinge shaft 23 causes the upper connecting rod 21 and the lower connecting rod 22 to rotate relative to each other. When the limiting boss 212 of the upper connecting rod 21 abuts against the tripping fixed shaft 316, the moving contact 310 reaches the position as shown in FIG. Figure 2 In the closing position shown in FIG. 1 , the second end of the first limiting groove 121 of the driving lever 12 is also abutted against the tripping fixed shaft 316. During the opening operation, the driving handle 11 is rotated counterclockwise, and the driving lever 12 can drive the connecting rod hinge shaft 23 to move in the opposite direction through the first elastic member 13, thereby driving the moving contact 310 to rotate until it reaches the position shown in FIG. Figure 1 In the open position shown, the first end of the first limiting groove 121 of the driving lever 12 is abutted against the tripping fixed shaft 316 to limit the rotation.

[0068] When the locked state is switched to the tripped state, the tripper 50 is driven to drive the traction drive portion 334, causing the traction rod 332 to rotate, thereby driving the traction overlap portion 331 to rotate. This causes the traction overlap portion 331 to switch from abutting against the bottom surface of the lock structure 32 to overlapping the second overlap portion 322. In other words, the circuit breaker switches from the locked state to the tripped state. In the tripped state, the circuit breaker remains in the open state.

[0069] To switch from the tripped state to the locked state, the middle-position actuating handle 11 is rotated counterclockwise. The actuating lever 12 causes the connecting rod assembly 20 to move the trip assembly 30 until the traction overlap portion 331 moves to the bottom surface of the locking structure 32, and the trip overlap portion 314 overlaps the first overlap portion 321. Only then can the circuit breaker be restored to the locked state. At this point, the circuit breaker is in the open state and can be closed by rotating the actuating handle 11 clockwise.

[0070] Specifically, if Figure 11 and Figure 12 As shown, the operating mechanism 200 of the embodiment of the present application can be applied to a multi-pole circuit breaker. The poles of the multi-pole circuit breaker can be linked via an inter-pole linkage 500. The inter-pole linkage 500 achieves linkage between adjacent poles by cooperating with a rotating shaft boss 510 and a rotating shaft groove 520. Thus, the poles of the multi-pole circuit breaker can be opened and closed synchronously. The inter-pole linkage 500 is made of an insulating material to improve the insulation performance between the multiple poles.

[0071] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, the elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the process, method, article, or device comprising the elements.

[0072] The above description is only a specific embodiment of the present application. Those skilled in the art will clearly understand that for the convenience and brevity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the scope of protection of the present application.

Claims

1. A circuit breaker, characterized in that: The invention comprises a housing (100), an operating mechanism (200), a contact assembly (300), and an arc extinguishing assembly (400) arranged in the housing (100), wherein the operating mechanism (200) and the contact assembly (300) are sequentially arranged and linked in a first direction (X), and the arc extinguishing assembly (400) is arranged on one side of the operating mechanism (200) and the contact assembly (300) along a second direction (Y); The operating mechanism (200) comprises a drive assembly (10), a connecting rod assembly (20) and a trip assembly (30); the drive assembly (10) and the connecting rod assembly (20) are arranged in sequence along the second direction (Y), and the drive assembly (10) drives the contact assembly (300) to switch between a closing state and an opening state through the connecting rod assembly (20); the trip assembly (30) and the connecting rod assembly (20) are arranged in sequence along the first direction (X), the trip assembly (30) is drivingly connected to the connecting rod assembly (20), and the trip assembly (30) has a locked state and a tripped state; in the locked state, the drive assembly (10) can drive the contact assembly (300) to switch between the closing state and the opening state, and in the tripped state, the contact assembly (300) maintains the opening state.

2. The circuit breaker according to claim 1, wherein: The trip assembly (30) includes a trip structure (31) and a lock structure (32); the trip structure (31) includes a trip mounting plate (315) and a trip limiter (311), a trip protrusion (312), and a trip fixing portion (313) mounted on the trip mounting plate (315); the trip structure (31) is rotatably connected to the housing (100) via the trip fixing portion (313); the trip protrusion (312) is a cylindrical structure and is rotatably connected to the connecting rod assembly (20); and the trip limiter (311) includes a trip overlap portion (314); The locking structure (32) includes a first overlapping portion (321), the first overlapping portion (321) is protruding toward the jump-lock structure (31), and the first overlapping portion (321) is arranged relative to the jump-lock overlapping portion (314); in the locked state, the jump-lock overlapping portion (314) overlaps the first overlapping portion (321), and in the released state, the jump-lock overlapping portion (314) is separated from the first overlapping portion (321) and abuts against the top surface of the locking structure (32).

3. The circuit breaker according to claim 2, characterized in that The trip assembly (30) further includes a traction structure (33), the traction structure (33) being rotatably disposed in the housing (100), and the traction structure (33) including a protruding traction overlap portion (331); The locking structure (32) further comprises a second overlapping portion (322) which is recessed and arranged relative to the traction overlapping portion (331); in the released state, the traction overlapping portion (331) overlaps the second overlapping portion (322); in the locked state, the traction overlapping portion (331) is separated from the second overlapping portion (322) and abuts against the bottom surface of the locking structure (32).

4. The circuit breaker according to claim 2, wherein: The jump-button structure (31) comprises two jump-button mounting plates (315) arranged in parallel. The two jump-button mounting plates (315) are mounted on both sides of the connecting rod assembly (20) in a third direction (Z). The two jump-button mounting plates (315) are fixedly connected via the jump-button limiting portion (311). Each jump-button mounting plate (315) has the jump-button protrusion (312) and the jump-button fixing portion (313).

5. The circuit breaker according to claim 4, characterized in that The two jump buckle fixing parts (313) are hole-shaped structures positioned opposite to each other. The jump buckle structure (31) further comprises a jump buckle fixing shaft (316). The jump buckle fixing shaft (316) is rotatably arranged in the two jump buckle fixing parts (313). The driving assembly (10) comprises a driving handle (11) and a driving lever (12) connected to each other. The driving lever (12) is a cover structure arranged outside the tripping structure (31). The driving lever (12) has a first limiting groove (121) with an arc structure. The first limiting groove (121) is slidably sleeved on the end of the tripping fixed shaft (316); in the open state, the tripping fixed shaft (316) is abutted against the first end of the first limiting groove (121), and in the closed state, the tripping fixed shaft (316) is abutted against the second end of the first limiting groove (121).

6. The circuit breaker according to claim 2, wherein: The jump buckle structure (31) further includes a jump buckle limiting shaft (317), wherein the jump buckle limiting shaft (317) passes through the jump buckle mounting plate (315) along a third direction (Z) and is rotatably connected to the jump buckle mounting plate (315); The operating mechanism (200) further comprises a support structure (40), wherein the support structure (40) is a cover structure arranged outside the tripping buckle structure (31), and the support structure (40) has a second limiting groove (41) with an arc structure, wherein the second limiting groove (41) is arranged to avoid the drive assembly (10), and the tripping buckle limiting shaft (317) is slidably arranged in the second limiting groove (41); in the locked state, the tripping buckle limiting shaft (317) is abutted against the first end of the second limiting groove (41), and in the tripping state, the tripping buckle limiting shaft (317) is abutted against the second end of the second limiting groove (41).

7. The circuit breaker according to claim 3, characterized in that The traction structure (33) further includes a traction rod (332), which is rotatably arranged in the housing (100), a first end of the traction rod (332) being a traction drive portion (334), the traction rod (332) being drivably connected to the tripper (50) of the circuit breaker via the traction drive portion (334), and a traction hinge (333) being rotatably connected to the traction overlap portion (331) via the traction hinge (333) at the second end of the traction rod (332).

8. The circuit breaker according to claim 2, wherein: The connecting rod assembly (20) includes an upper connecting rod (21) and a lower connecting rod (22) that are rotatably connected to each other. The upper connecting rod (21) includes a recessed rotation groove (211) and a protruding limiting boss (212). The rotation groove (211) is provided at one end of the upper connecting rod (21) away from the lower connecting rod (22). The upper connecting rod (21) is rotatably connected to the jump buckle protrusion (312) through the rotation groove (211). The limiting boss (212) is provided in the middle of the upper connecting rod (21) and is arranged opposite to the jump buckle fixing portion (313). The end of the lower connecting rod (22) away from the upper connecting rod (21) is rotatably connected to the contact assembly (300).

9. The circuit breaker according to claim 8, characterized in that The upper connecting rod (21) includes two first connecting rod portions (213) arranged in parallel, the two first connecting rod portions (213) are connected by a first connecting portion (214), and each first connecting rod portion (213) has the rotation groove (211) and the limiting boss (212); the lower connecting rod (22) includes two second connecting rod portions (221) arranged in parallel, and the two second connecting rod portions (221) are connected by a second connecting portion (222); The connecting rod assembly (20) further comprises a connecting rod hinge shaft (23) extending along a third direction (Z), and the upper connecting rod (21) and the lower connecting rod (22) are rotatably connected via the connecting rod hinge shaft (23).

10. The circuit breaker according to claim 9, characterized in that The driving assembly (10) comprises a driving handle (11), a driving lever (12) and a first elastic member (13) connected to each other, wherein one end of the first elastic member (13) is connected to the driving lever (12) and the other end is connected to the connecting rod hinge shaft (23).

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