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

[0002] In the market, miniature molded case circuit breakers are relatively small in size and require internal components such as an operating mechanism, contact structure, and arc-extinguishing structure. The circuit breaker can be opened by the cooperation of the operating mechanism and contact structure, and the arc-extinguishing structure can be used to extinguish the arc after the contact structure breaks.

[0003] Currently, inside circuit breakers, the operating mechanism, which is used to link the operating handle and contact structure, has a relatively complex overall structure in order to realize the circuit breaker's opening and closing functions. It usually occupies most of the space inside the circuit breaker, which squeezes the space for the arc extinguishing structure, resulting in insufficient capacity of the arc extinguishing structure and the inability to rationally allocate the internal space of the circuit breaker. Summary of the Invention

[0004] This application provides a circuit breaker in which, while ensuring the normal function of the circuit breaker, the internal operating mechanism is reasonably set in terms of structure and position, ensuring the space for the contact structure and arc extinguishing structure, and making reasonable allocation of the internal space of the circuit breaker.

[0005] This application provides a circuit breaker, comprising a housing and an operating mechanism, a contact assembly, and an arc-extinguishing assembly disposed within the housing. The operating mechanism and the contact assembly are arranged sequentially and linked along a first direction, and the arc-extinguishing assembly is disposed on one side of the operating mechanism and the contact assembly along a second direction. The operating mechanism includes a drive assembly, a linkage assembly, and a tripping assembly. The drive assembly and the linkage assembly are arranged sequentially along the second direction, and the drive assembly drives the contact assembly to switch between a closed state and an open state via the linkage assembly. The tripping assembly and the linkage assembly are arranged sequentially along the first direction, and the tripping assembly is drivenly connected to the linkage assembly. The tripping assembly has a locked state and a tripped state. In the locked state, the drive assembly can drive the contact assembly to switch between a closed state and an open state. In the tripped state, the contact assembly remains in the open state.

[0006] In the circuit breaker described above, the tripping assembly includes a tripping structure and a locking structure. The tripping structure includes a tripping mounting plate and a tripping limiting part, a tripping protrusion, and a tripping fixing part mounted on the tripping mounting plate. The tripping structure is rotatably connected to the housing through the tripping fixing part. The tripping protrusion has a cylindrical structure and is rotatably connected to the connecting rod assembly. The tripping limiting part includes a tripping overlapping part. The locking structure includes a first overlapping part, which protrudes towards the tripping structure and is positioned opposite to the tripping overlapping part. In the locked state, the tripping overlapping part overlaps with the first overlapping part. In the tripped state, the tripping overlapping part separates from the first overlapping part and abuts against the top surface of the locking structure.

[0007] In the circuit breaker described above, the tripping assembly further includes a traction structure, which is rotatably disposed within the housing. The traction structure includes a protruding traction overlap portion. The locking structure further includes a recessed second overlap portion, which is positioned opposite to the traction overlap portion. In the tripped state, the traction overlap portion overlaps within the second overlap portion. In the locked state, the traction overlap portion disengages from the second overlap portion and abuts against the bottom surface of the locking structure.

[0008] In the circuit breaker described above, the tripping structure includes two parallel tripping mounting plates. The two tripping mounting plates are installed on both sides of the linkage assembly in the third direction. The two tripping mounting plates are fixedly connected by a tripping limiting part. Each tripping mounting plate has a tripping protrusion and a tripping fixing part.

[0009] In the circuit breaker described above, the two tripping fixing parts are hole-like structures with opposite positions. The tripping structure also includes a tripping fixing shaft, which is rotatably inserted into the two tripping fixing parts. The drive assembly includes a drive handle and a drive lever connected to each other. The drive lever is a cover structure covering the outside of the tripping structure. The drive lever has a first limiting groove with an arc-shaped structure, which is slidably sleeved on the end of the tripping fixing shaft. In the open state, the tripping fixing shaft abuts against the first end of the first limiting groove. In the closed state, the tripping fixing shaft abuts against the second end of the first limiting groove.

[0010] The circuit breaker described above includes a tripping structure that further comprises a tripping limit shaft, which passes through the tripping mounting plate along a third direction and rotatably connects with the tripping mounting plate; the operating mechanism also includes a support structure, which is a cover structure covering the outside of the tripping structure, and the support structure has an arc-shaped second limiting groove that avoids the drive assembly, and the tripping limit shaft is slidably disposed within the second limiting groove; in the locked state, the tripping limit shaft abuts against the first end of the second limiting groove, and in the tripped state, the tripping limit shaft abuts against the second end of the second limiting groove.

[0011] In the circuit breaker described above, the traction structure also includes a traction rod, which is rotatably located inside the housing. The first end of the traction rod is a traction drive unit, which drives the traction rod to the trip unit of the circuit breaker. The second end of the traction rod is provided with a traction hinge, which rotatably connects the traction rod to the traction overlap unit.

[0012] In the circuit breaker described above, the linkage assembly includes an upper linkage and a lower linkage that are rotatably connected. The upper linkage includes a recessed rotating groove and a protruding limiting boss. The rotating groove is located at the end of the upper linkage away from the lower linkage. The upper linkage is rotatably connected to the trip latch protrusion through the rotating groove. The limiting boss is located in the middle of the upper linkage and is positioned opposite to the trip latch fixing part. The end of the lower linkage away from the upper linkage is rotatably connected to the contact assembly.

[0013] The circuit breaker described above includes an upper connecting rod comprising two parallel first connecting rod portions connected by a first connecting portion, each first connecting rod portion having a rotating groove and a limiting boss; a lower connecting rod comprising two parallel second connecting rod portions connected by a second connecting portion; the connecting rod assembly also includes a connecting rod hinge shaft extending along a third direction, the upper connecting rod and the lower connecting rod being rotatably connected via the connecting rod hinge shaft.

[0014] In the circuit breaker described above, the drive assembly includes a drive handle, a drive lever, and a first elastic element connected together. One end of the first elastic element is connected to the drive lever, and the other end is connected to the linkage hinge shaft.

[0015] The circuit breaker of this application includes a housing and an operating mechanism, a contact assembly, and an arc-extinguishing assembly disposed within the housing. The operating mechanism is used to operate the contact assembly in states such as opening, closing, and tripping. The arc-extinguishing assembly is capable of extinguishing the arc generated when the contact assembly is open. The operating mechanism includes a drive assembly, a linkage assembly, and a tripping assembly. The drive assembly drives the contact assembly to switch between a closed and open state via the linkage assembly. The tripping assembly is driven and connected to the linkage assembly, and has a locked state and a tripped state. In the locked state, the drive assembly can drive the contact assembly to switch between a closed and open state; in the tripped state, the contact assembly remains in the open state. Therefore, under the coordinated action of the drive assembly, linkage assembly, and tripping assembly, the circuit breaker can switch between a closed and open state, and can also switch between a locked and tripped state, ensuring the normal function of the circuit breaker.

[0016] Based on this, the circuit breaker's drive assembly and linkage assembly are arranged sequentially along the second direction, and the tripping assembly and linkage assembly are arranged sequentially along the first direction, thus forming the overall structure of the operating mechanism. The operating mechanism as a whole and the contact assembly are arranged sequentially and linked together along the first direction. The arc-extinguishing assembly is located on one side of the operating mechanism and the contact assembly along the second direction. This arrangement makes reasonable use of the space between the contact assembly and the arc-extinguishing assembly. The operating mechanism is located within this space and does not affect 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 reasonably arranged in terms of structure and position, ensuring the installation space for the contact assembly and the arc-extinguishing assembly, and making reasonable allocation of the internal space of the circuit breaker. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the contact assembly of the circuit breaker in an embodiment of this 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 this application when it is closed;

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

[0021] Figure 4 This is a schematic diagram illustrating the cooperation between the operating mechanism and the contact assembly of the circuit breaker according to an embodiment of this application;

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

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

[0024] Figure 7 This is a schematic diagram of the linkage assembly of the circuit breaker according to an embodiment of this application;

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

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

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

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

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

[0030] Explanation of icon numbers:

[0031] 10. Drive assembly; 11. Drive handle; 12. Drive lever; 13. First elastic element; 121. First limiting groove; 20. Linkage assembly; 21. Upper link; 211. Rotation groove; 212. Limiting boss; 213. First link portion; 214. First connecting portion; 22. Lower link; 221. Second link portion; 222. Second connecting portion; 23. Linkage hinge shaft; 30. Release assembly; 31. Jump-out structure; 311. Jump-out limiting portion; 312. Jump-out protrusion 313. Jumper buckle fixing part; 314. Jumper buckle overlapping part; 315. Jumper buckle mounting plate; 316. Jumper buckle fixing shaft; 317. Jumper buckle limiting shaft; 32. Locking structure; 321. First overlapping part; 322. Second overlapping part; 33. Traction structure; 331. Traction overlapping part; 332. Traction rod; 333. Traction hinge; 334. Traction drive part; 40. Bracket structure; 41. Second limiting groove; 42. Limiting plate; 43. Bracket frustum; 50. Release device;

[0032] 100. Housing; 200. Operating mechanism; 300. Contact assembly; 310. Moving contact; 320. Stationary contact; 400. Arc extinguishing assembly; 500. Inter-pole linkage; 510. Shaft boss; 520. Shaft groove;

[0033] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0034] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0035] like Figures 1 to 12As shown in the figure, this 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 disposed within the housing 100. The operating mechanism 200 and the contact assembly 300 are arranged sequentially and linked along a first direction X, and the arc-extinguishing assembly 400 is disposed 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 linkage assembly 20, and a tripping assembly 30. The drive assembly 10 and the linkage assembly 20... The components are arranged sequentially along the second direction Y, and the drive assembly 10 drives the contact assembly 300 to switch between the closed state and the open state through the linkage assembly 20. The trip assembly 30 and the linkage assembly 20 are arranged sequentially along the first direction X, and the trip assembly 30 is drivenly connected to the linkage assembly 20. 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 closed state and the open state. In the tripped state, the contact assembly 300 remains in the open state.

[0036] In specific implementation, the circuit breaker of this application embodiment 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 in states such as opening, closing, and tripping. 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 linkage assembly 20, and a tripping assembly 30. The drive assembly 10 drives the contact assembly 300 to switch between a closed state and an open state through the linkage assembly 20. The tripping assembly 30 is drivenly connected to the linkage assembly 20 and has a locked state and a tripping state. In the locked state, the drive assembly 10 can drive the contact assembly 300 to switch between a closed state and an open state. In the tripping state, the contact assembly 300 remains in the open state. Therefore, under the coordinated action of the drive assembly 10, the linkage 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, thus ensuring the normal function of the circuit breaker.

[0037] It should be noted that when the circuit breaker malfunctions or needs to be tested, the trip unit 50 can trigger the trip assembly 30, causing the trip assembly 30 to switch to the trip state. This ensures that the contact assembly 300 can only be in the open state. The trip state setting prevents operators from accidentally operating the drive assembly 10 during circuit breaker malfunctions or testing, causing the contact assembly 300 to close and resulting in personnel safety issues or further circuit breaker malfunctions. When the circuit breaker is operating normally, the trip assembly 30 can be kept in the locked state. In this way, the operator can operate the drive assembly 10 to switch the contact assembly 300 between the closed and open states to complete the circuit breaker's connection or disconnection of the overall circuit.

[0038] Based on this, the drive assembly 10 and the linkage assembly 20 of the circuit breaker are arranged sequentially along the second direction Y, and the tripping assembly 30 and the linkage assembly 20 are arranged sequentially along the first direction X, thus forming the overall structure of the operating mechanism 200. The operating mechanism 200 and the contact assembly 300 are arranged sequentially and linked together along the first direction X. The arc-extinguishing assembly 400 is located on one side of the operating mechanism 200 and the contact assembly 300 along the second direction Y. This arrangement makes reasonable use of the space between the contact assembly 300 and the arc-extinguishing assembly 400. The operating mechanism 200 is located within this space and will not affect 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 inside the circuit breaker is reasonably set in terms of structure and position, ensuring the installation space of the contact assembly 300 and the arc-extinguishing assembly 400, and making reasonable allocation of the internal space of the circuit breaker.

[0039] Specifically, such as Figure 1 and Figure 2 As shown, the contact assembly 300 includes a moving contact 310 and a stationary contact 320. The moving contact 310 is rotatably configured. When the moving contact 310 rotates to contact the stationary contact 320, the circuit breaker is in the closed state; when the moving contact 310 rotates to separate from the stationary contact 320, the circuit breaker is in the open state. The linkage assembly 20 is connected to the moving contact 310 and can drive the moving contact 310 to rotate.

[0040] like Figure 5 As shown in the embodiment of the circuit breaker, the tripping assembly 30 includes a tripping structure 31 and a locking structure 32. The tripping structure 31 includes a tripping mounting plate 315 and a tripping limiting part 311, a tripping protrusion 312, and a tripping fixing part 313 mounted on the tripping mounting plate 315. The tripping structure 31 is rotatably connected to the housing 100 through the tripping fixing part 313. The tripping protrusion 312 has a cylindrical structure and is rotatably connected to the connecting rod assembly 20. The snap-locking limit part 311 includes a snap-locking overlap part 314; the locking structure 32 includes a first overlap part 321, which protrudes toward the snap-locking structure 31 and is positioned opposite to the snap-locking overlap part 314; in the locked state, the snap-locking overlap part 314 overlaps with the first overlap part 321, and in the unlocked state, the snap-locking overlap part 314 separates from the first overlap part 321 and abuts against the top surface of the locking structure 32.

[0041] In specific implementation, the snap fastener structure 31 can be rotatably connected to the housing 100 through the snap fastener fixing part 313, so that the snap fastener overlapping part 314 can rotate around the snap fastener fixing part 313 as the rotation center, thereby being able to overlap with the first overlapping part 321, or separate from the first overlapping part 321 and abut against the top surface of the snap fastener structure 32, and the release assembly 30 completes the conversion between the locked state and the release state.

[0042] During the rotation of the trip latch structure 31, the connecting rod assembly 20 can always abut against the trip latch protrusion 312 of the cylindrical structure and always rotate around the circumferential surface of the trip latch protrusion 312, thereby realizing the switching of the drive contact assembly 300 between the closed state and the open state.

[0043] Specifically, the trip limit part 311, the trip protrusion part 312, and the trip fixing part 313 are arranged in a triangular shape on the trip mounting plate 315. In the second direction Y, the trip protrusion part 312 is located between the trip limit part 311 and the trip fixing part 313. This positional distribution ensures that the three parts have relative stability after being fixed or installed with their 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 linkage assembly 20, it will not have any impact on the operation. The circuit breaker can normally complete the opening, closing, locking, and tripping actions.

[0044] like Figure 6 As shown in the embodiment of the circuit breaker, the tripping assembly 30 further includes a traction structure 33, which is rotatably disposed within the housing 100. The traction structure 33 includes a protruding traction overlap portion 331. The locking structure 32 further includes a recessed second overlap portion 322, which is positioned opposite to the traction overlap portion 331. In the tripped state, the traction overlap portion 331 overlaps within the second overlap portion 322. In the locked state, the traction overlap portion 331 disengages from the second overlap portion 322 and abuts against the bottom surface of the locking structure 32.

[0045] In practice, the rotation of the traction structure 33 causes the traction overlap 331 to shift. In the disengaged state, the traction overlap 331 overlaps with the second overlap 322, allowing the traction overlap 331 to engage with the second overlap 322. When the direction of the applied external force is inaccurate, the traction overlap 331 cannot disengage from the second overlap 322, and the disengagement assembly 30 remains in the disengaged state. The snap-lock overlap 314 also abuts against the top surface of the locking structure 32, preventing relative displacement. In the locked state, the traction overlap 331 disengages from the second overlap. Part 322 abuts against the bottom surface of the locking structure 32. At this time, the thrust of the traction lap part 331 can keep the locking structure 32 in the current position. In this position, the first lap part 321 of the locking structure 32 laps with the trip lap part 314, and the trip assembly 30 can remain locked. At this time, no matter how the linkage assembly 20 rotates and moves, the trip assembly 30 will not move. The linkage assembly 20 rotates around the fixed trip protrusion 312, thereby driving the contact assembly 300, and the circuit breaker can freely open and close.

[0046] Specifically, the locking structure 32 is formed by three connecting plates that are vertically connected in sequence. The first overlapping part 321 and the second overlapping part 322 are both located on the top connecting part of the locking structure 32. In the locked state of the release assembly 30, the vertical connecting plate in the middle can also limit the movement of the buckle overlapping part 314.

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

[0048] In practical implementation, the two parallel trip mounting plates 315 of the trip structure 31 are respectively installed on both sides of the linkage assembly 20 in the third direction Z. When the linkage assembly 20 is fixed, it can simultaneously engage with the trip protrusions 312 on the trip mounting plates 315 on both sides. This makes the rotational stability of the linkage assembly 20 higher and prevents it from falling off the trip protrusions 312, thus ensuring the stability of the circuit breaker's opening and closing. The design of the two trip fixing parts 313 also allows the trip structure 31 to be rotated and fixed to the housing 100 on both sides, improving the installation stability of the trip structure 31 within the housing 100.

[0049] In the circuit breaker of this application embodiment, the two tripping fixing parts 313 are hole-like structures with opposite positions. The tripping structure 31 also includes a tripping fixing shaft 316, which is rotatably inserted into the two tripping fixing parts 313. The drive assembly 10 includes a drive handle 11 and a drive lever 12 connected to each other. The drive lever 12 is a cover structure covering the outside of the tripping structure 31. The drive lever 12 has a first limiting groove 121 with an arc-shaped structure. 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 abuts against the first end of the first limiting groove 121. In the closed state, the tripping fixing shaft 316 abuts against the second end of the first limiting groove 121.

[0050] In specific implementation, the jump buckle fixing shaft 316 can be respectively inserted into the two hole-shaped jump buckle fixing parts 313, so that the entire jump buckle structure 31 can rotate around the jump buckle fixing shaft 316 to realize the conversion between the locked state and the released state. Furthermore, the jump buckle fixing shaft 316 can be fixed to the housing 100, so that the jump buckle mounting plate 315 can be rotatably connected to the housing 100.

[0051] The drive assembly 10 includes a drive handle 11 and a drive lever 12 connected to each other. The drive handle 11 can be manually operated by the operator. After the operator operates the drive handle 11, the drive handle 11 can drive the drive lever 12 to move. Since the drive lever 12 is covered outside the trip latch structure 31 and has an arc-shaped first limiting groove 121, which is sleeved on the end of the trip latch fixing shaft 316, when the drive lever 12 moves, under the limiting action of the trip latch fixing shaft 316, the drive lever 12 can slide along the arc-shaped extension direction of its first limiting groove 121. And through the limitation at both ends of the first limiting groove 121, during the rotation of the drive lever 12, the trip latch fixing shaft 316 will abut against both ends of the first limiting groove 121 respectively, 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 this application embodiment, the trip structure 31 further includes a trip limiting shaft 317, which passes through the trip mounting plate 315 along the third direction Z and is rotatably connected to the trip mounting plate 315; the operating mechanism 200 further includes a support structure 40, which is a cover structure covering the outside of the trip structure 31. The support structure 40 has an arc-shaped second limiting groove 41, which is disposed to avoid the drive assembly 10. The trip limiting shaft 317 is slidably disposed in the second limiting groove 41; in the locked state, the trip limiting shaft 317 abuts against the first end of the second limiting groove 41; in the tripped state, the trip limiting shaft 317 abuts against the second end of the second limiting groove 41.

[0053] In practice, the buckle limiting shaft 317 of the buckle structure 31 can slide within the second limiting groove 41 of the bracket structure 40. When the entire buckle structure 31 rotates around the buckle fixing shaft 316, the buckle limiting shaft 317 will also rotate. When the buckle limiting shaft 317 reaches and abuts against the first end of the second limiting groove 41, the entire buckle structure 31 will not continue to rotate. At this time, the buckle overlapping part 314 of the buckle structure 31 overlaps the surface of the first overlapping part 321 of the locking structure 32, thus the buckle... Both sides of the structure 31 are restricted by the first end of the second limiting groove 41 and the first overlapping part 321, respectively, and the release assembly 30 is in a locked state; when the jump buckle limiting shaft 317 reaches and abuts against the second end of the second limiting groove 41, the entire jump buckle structure 31 will not continue to rotate, and at this time the jump buckle overlapping part 314 of the jump buckle structure 31 abuts against the top surface of the locking structure 32. Therefore, both sides of the jump buckle structure 31 are restricted by the second end of the second limiting groove 41 and the top surface of the locking structure 32, respectively, and the release assembly 30 is in a released state.

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

[0055] Specifically, the support structure 40 of the enclosure is located between the drive lever 12 and the trip latch structure 31, and is stacked on top of the drive lever 12, which is also a enclosure structure. The support structure 40 has a limiting plate 42 on its side wall perpendicular to the third direction Z. The limiting plate 42 is arranged parallel to the side wall of the support structure 40 and is connected by a connecting structure. The drive lever 12 rotates between the limiting plate 42 and the side wall of the support structure 40. The setting of the limiting plate 42 restricts the movement of the drive lever 12 in the third direction Z, and avoids the drive lever 12 from having a large offset in the third direction Z, which would affect the opening and closing operation of the circuit breaker.

[0056] The support structure 40 also has a support frustum 43 protruding from its side wall, and the drive lever 12 has a corresponding circular recess at the same position. The drive lever 12 can be engaged with the outer circumferential surface of the support frustum 43 through its circular recess and rotate around the outer circumferential surface of the support frustum 43. The support frustum 43 provides support for the rotation of the drive lever 12.

[0057] like Figure 6As shown in the embodiment of the circuit breaker of this application, the traction structure 33 further includes a traction rod 332, which is rotatably disposed within the housing 100. The first end of the traction rod 332 is a traction drive part 334, which drives the traction rod 332 to the trip unit 50 of the circuit breaker through the traction drive part 334. The second end of the traction rod 332 is provided with a traction hinge 333, which rotatably connects the traction rod 332 to the traction overlap part 331 through the traction hinge 333.

[0058] In practical implementation, the trip unit 50 drives the traction drive unit 334, causing the traction rod 332 to rotate, which in turn drives the traction overlap part 331 to rotate. This changes the state of the traction overlap part 331 from being pressed against the bottom surface of the locking structure 32 to being overlapped with the second overlap part 322, meaning the circuit breaker changes from a locked state to a tripped state. The traction hinge 333 allows the traction overlap part 331 to rotate relative to the traction rod 332. During the rotation of the traction rod 332, the traction overlap part 331 rotates slightly, preventing stress from causing the traction overlap part 331 to break.

[0059] It should be noted that in the tripped state, the drive handle 11 of the drive assembly 10 is in the middle position between the open and closed states. At this time, the trip unit 50 cannot rotate the traction rod 332, and thus the circuit breaker cannot be changed from the tripped state to the locked state. Therefore, in the tripped state, the drive handle 11 needs to be rotated to make the linkage assembly 20 drive the trip assembly 30 to move, so that the traction overlap part 331 moves to the bottom surface of the locking structure 32, and the trip overlap part 314 overlaps with the first overlap part 321. Only then can the circuit breaker as a whole return to the open state in the locked state.

[0060] like Figure 7 As shown in the embodiment of the circuit breaker of this application, the linkage assembly 20 includes an upper linkage 21 and a lower linkage 22 that are rotatably connected. The upper linkage 21 includes a recessed rotation groove 211 and a protruding limiting boss 212. The rotation groove 211 is located at the end of the upper linkage 21 away from the lower linkage 22. The upper linkage 21 is rotatably connected to the trip buckle protrusion 312 through the rotation groove 211. The limiting boss 212 is located in the middle of the upper linkage 21 and is positioned opposite to the trip buckle fixing part 313. The end of the lower linkage 22 away from the upper linkage 21 is rotatably connected to the contact assembly 300.

[0061] In 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 the upper connecting rod 21 and the lower connecting rod 22 will rotate relative to each other. The upper connecting rod 21 rotates around the trip buckle protrusion 312 through the rotating groove 211. When the upper connecting rod 21 rotates to the closed state, its limiting protrusion 212 abuts against the trip buckle fixing part 313, thereby limiting the upper connecting rod 21 and the lower connecting rod 22 connected to it, and preventing the moving contact 310 from continuing to rotate in the closed state.

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

[0063] In specific implementation, the two parallel first connecting rod portions 213 of the upper connecting rod 21 enable the upper connecting rod 21 to have rotational and abutment stability. When the upper connecting rod 21 is rotatably connected to the jump buckle protrusion 312, it has two rotation grooves 211 to support its rotation. Furthermore, the upper connecting rod 21 and the lower connecting rod 22 are rotatably connected through a connecting rod hinge shaft 23. The connecting rod hinge shaft 23 passes through the two first connecting rod portions 213 and the two second connecting rod portions 221 respectively, so that the rotational connection between the upper connecting rod 21 and the lower connecting rod 22 also has stability.

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

[0065] In practice, when the drive handle 11 drives the drive lever 12 to rotate, the first elastic element 13 moves under the drive of the drive 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, so as to realize the opening and closing of the circuit breaker contact assembly 300.

[0066] It should be noted that the overall operating procedure for the circuit breaker is as follows:

[0067] In the locked state, during the closing operation, rotating the drive handle 11 clockwise causes the drive lever 12 to move the connecting rod hinge shaft 23 via the first elastic element 13. This movement of the connecting rod hinge shaft 23 causes relative rotation between the upper connecting rod 21 and the lower connecting rod 22. When the limiting boss 212 of the upper connecting rod 21 abuts against the trip latch fixing shaft 316, the moving contact 310 reaches the... Figure 2 In the closed position shown, the second end of the first limiting groove 121 of the drive lever 12 also abuts against the trip latch fixing shaft 316. During the opening operation, rotating the drive handle 11 counterclockwise causes the drive lever 12 to move the connecting rod hinge shaft 23 in the opposite direction via the first elastic element 13, thereby causing the moving contact 310 to rotate until it reaches the position shown. Figure 1 In the open position shown, the first end of the first limiting groove 121 of the drive lever 12 abuts against the jump buckle fixing shaft 316 to limit the rotation.

[0068] When it is necessary to switch from the locked state to the tripped state, the trip unit 50 needs to be driven to drive the traction drive unit 334. The traction rod 332 can rotate, thereby driving the traction overlap part 331 to rotate. This changes the state of the traction overlap part 331 from being pressed against the bottom surface of the locking structure 32 to being overlapped with the second overlap part 322. That is, the circuit breaker switches from the locked state to the tripped state. In the tripped state, the circuit breaker always remains in the open state.

[0069] When it is necessary to switch from the tripped state to the locked state, the drive handle 11 in the middle position needs to be rotated counterclockwise. The drive lever 12 causes the linkage assembly 20 to move the tripping assembly 30 until the traction overlap part 331 moves to the bottom surface of the locking structure 32. The trip overlap part 314 then overlaps with the first overlap part 321, and the entire circuit breaker can return to the locked state. At this time, the circuit breaker is in the open state, and the circuit breaker can be closed by rotating the drive handle 11 clockwise.

[0070] Specifically, such as Figure 11 and Figure 12 As shown, the operating mechanism 200 of this embodiment can be applied to a multi-pole circuit breaker. The poles of the multi-pole circuit breaker can be linked together by the inter-pole linkage 500. The inter-pole linkage 500 achieves linkage between adjacent poles through the cooperation of the rotating shaft boss 510 and the rotating shaft groove 520. Therefore, the poles of the multi-pole circuit breaker can perform synchronous opening and closing. The inter-pole linkage 500 is made of insulating material, which can increase the insulation performance between the poles.

[0071] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0072] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A circuit breaker characterized by, The device 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) and the contact assembly (300) are arranged sequentially and linked together along a first direction (X). The arc-extinguishing assembly (400) is disposed 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 linkage assembly (20), and a tripping assembly (30). The drive assembly (10) and the linkage assembly (20) are arranged sequentially along the second direction (Y), and the drive assembly (10) drives the contact assembly (300) to switch between a closed state and a closed state through the linkage assembly (20). The tripping assembly (30) and the linkage assembly (20) are arranged sequentially along the first direction (X), and the tripping assembly (30) is drivenly connected to the linkage assembly (20). The tripping assembly (30) has a locked state and a tripping 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 tripping state, the contact assembly (300) maintains the open state.

2. The circuit breaker according to claim 1, characterized in that, The tripping assembly (30) includes a tripping structure (31) and a locking structure (32). The tripping structure (31) includes a tripping mounting plate (315) and a tripping limiting part (311), a tripping protrusion (312), and a tripping fixing part (313) mounted on the tripping mounting plate (315). The tripping structure (31) is rotatably connected to the housing (100) through the tripping fixing part (313). The tripping protrusion (312) has a cylindrical structure and is rotatably connected to the connecting rod assembly (20). The tripping limiting part (311) includes a tripping overlapping part (314). The locking structure (32) includes a first overlapping portion (321), which protrudes toward the snap fastener structure (31) and is positioned opposite to the snap fastener overlapping portion (314). In the locked state, the snap fastener overlapping portion (314) overlaps with the first overlapping portion (321). In the unhooked state, the snap fastener overlapping portion (314) separates 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 tripping assembly (30) further includes a traction structure (33), which is rotatably disposed within the housing (100), and the traction structure (33) includes a protruding traction overlap portion (331); The locking structure (32) further includes a recessed second overlapping portion (322), which is positioned opposite to the traction overlapping portion (331). In the disengaged state, the traction overlapping portion (331) overlaps within the second overlapping portion (322). In the locked state, the traction overlapping portion (331) disengages 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, characterized in that, The jump buckle structure (31) includes two parallel jump buckle mounting plates (315), which are mounted on both sides of the connecting rod assembly (20) in the third direction (Z). The two jump buckle mounting plates (315) are fixedly connected by the jump buckle limiting part (311). Each jump buckle mounting plate (315) has a jump buckle protrusion (312) and a jump buckle fixing part (313).

5. The circuit breaker according to claim 4, characterized in that, The two buckle fixing parts (313) are hole-shaped structures with opposite positions. The buckle structure (31) also includes a buckle fixing shaft (316), which is rotatably inserted into the two buckle fixing parts (313). The drive assembly (10) includes a drive handle (11) and a drive lever (12) connected to each other. The drive lever (12) is a cover structure covering the outside of the trip buckle structure (31). The drive lever (12) has a first limiting groove (121) with an arc-shaped structure. The first limiting groove (121) is slidably sleeved on the end of the trip buckle fixing shaft (316). In the open state, the trip buckle fixing shaft (316) abuts against the first end of the first limiting groove (121). In the closed state, the trip buckle fixing shaft (316) abuts against the second end of the first limiting groove (121).

6. The circuit breaker according to claim 2, characterized in that, The jump buckle structure (31) also includes a jump buckle limiting shaft (317), which 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 includes a support structure (40), which is a cover structure covering the outside of the buckle structure (31). The support structure (40) has a second limiting groove (41) with an arc shape. The second limiting groove (41) is disposed away from the drive assembly (10). The buckle limiting shaft (317) is slidably disposed in the second limiting groove (41). In the locked state, the buckle limiting shaft (317) abuts against the first end of the second limiting groove (41). In the unhooked state, the buckle limiting shaft (317) abuts 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 disposed within the housing (100). The first end of the traction rod (332) is a traction drive unit (334), which is driven to the trip unit (50) of the circuit breaker through the traction drive unit (334). The second end of the traction rod (332) is provided with a traction hinge (333), which is rotatably connected to the traction overlap part (331) through the traction hinge (333).

8. The circuit breaker according to claim 2, characterized in that, The linkage assembly (20) includes an upper linkage (21) and a lower linkage (22) that are rotatably connected. The upper linkage (21) includes a recessed rotating groove (211) and a protruding limiting boss (212). The rotating groove (211) is located at the end of the upper linkage (21) away from the lower linkage (22). The upper linkage (21) is rotatably connected to the jump buckle protrusion (312) through the rotating groove (211). The limiting boss (212) is located in the middle of the upper linkage (21) and is positioned opposite to the jump buckle fixing part (313). The end of the lower linkage (22) away from the upper linkage (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 parallel first connecting rod parts (213), which are connected by a first connecting part (214). Each first connecting rod part (213) has the rotating groove (211) and the limiting boss (212). The lower connecting rod (22) includes two parallel second connecting rod parts (221), which are connected by a second connecting part (222). The link assembly (20) also includes a link hinge shaft (23) extending in a third direction (Z), through which the upper link (21) and the lower link (22) are rotatably connected.

10. The circuit breaker according to claim 9, characterized in that, The drive assembly (10) includes a drive handle (11), a drive lever (12), and a first elastic element (13) connected together. One end of the first elastic element (13) is connected to the drive lever (12), and the other end is connected to the connecting rod hinge shaft (23).

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