Quick-acting device and circuit breaker

Abstract

The invention relates to the field of low-voltage electric appliances, in particular to a quick-acting device and a circuit breaker, in an electromagnetic system of the quick-acting device, a main armature is used for driving a moving contact assembly to act, and a coil assembly comprises a main magnet yoke and an electromagnetic coil; in the quick-acting mechanism, an auxiliary magnet yoke and an auxiliary armature are matched, an auxiliary reset piece is used for driving the auxiliary magnet yoke and the auxiliary armature to be separated, and an auxiliary conductor is connected in series with a main circuit where a moving contact assembly is located and penetrates through the middle of the auxiliary magnet yoke; when a short circuit fault occurs in a main circuit where the moving contact assembly is located, the electromagnetic structure triggers the auxiliary switch to switch the state through the trigger piece so that power supply of the electromagnetic coil can be cut off. The auxiliary armature of the quick-acting device triggers the auxiliary switch through the trigger piece, transmission is stable and reliable, a transmission link and internal layout design are facilitated, the trigger piece is used for electrical isolation between the auxiliary switch and a main circuit, and the reliability of the quick-acting device is improved.

Description

Technical Field

[0001] The present invention relates to the field of low-voltage electrical appliances, and particularly to a quick-acting device and a circuit breaker. Background Art

[0002] For existing switching electrical appliances (such as contactors) that use an electromagnetic system to drive the closing and opening of the contact mechanism, most can only close, carry, and interrupt the current under normal circuit conditions, and do not have the function of interrupting short-circuit current. In order to achieve the circuit protection function, a circuit breaker with short-circuit protection function needs to be introduced. For the short-circuit protection mechanisms of a small number of existing switching electrical appliances, a set of cooperating moving contacts and static contacts are connected in series to the power supply circuit of the electromagnetic system, and the armature of an electromagnetic structure cooperating with the main circuit of the switching electrical appliance directly drives the moving contacts to act, so that the moving contacts and static contacts of the short-circuit protection mechanism are disconnected. There is a lack of necessary electrical isolation measures between the main circuit of the switching electrical appliance and the power supply circuit of the electromagnetic system. In addition, the structure of the existing short-circuit protection mechanism occupies a large space and is complex to assemble. Summary of the Invention

[0003] The purpose of the present invention is to overcome at least one defect of the prior art, and provide a quick-acting device and a circuit breaker including the quick-acting device. The auxiliary armature of the quick-acting device triggers the auxiliary switch through a trigger member, with stable and reliable transmission, facilitating the design of the transmission link and internal layout. Moreover, the trigger member serves as a necessary electrical isolation between the auxiliary switch and the main circuit, improving the reliability of the quick-acting device.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A quick-acting device includes a quick-acting mechanism and an electromagnetic system. The electromagnetic system includes a cooperating coil assembly and a main armature for driving the moving contact assembly to act to close and disconnect from the corresponding static contact group. The coil assembly includes a main magnetic yoke and an electromagnetic coil. The quick-acting mechanism includes an electromagnetic structure and an auxiliary switch; the electromagnetic structure includes a cooperating auxiliary magnetic yoke and an auxiliary armature, an auxiliary conductor for being connected in series with the main circuit where the moving contact assembly is located and passing through the middle of the auxiliary magnetic yoke, and an auxiliary reset member for driving the auxiliary armature to separate from the auxiliary magnetic yoke;

[0006] The quick-acting mechanism further includes a trigger member driven by the auxiliary armature to move; when a short-circuit fault occurs in the main circuit where the moving contact assembly is located, the electromagnetic structure triggers the auxiliary switch to switch states through the trigger member, so that the power supply of the electromagnetic coil is cut off.

[0007] Further, the electromagnetic system further includes a control circuit board respectively connected to the electromagnetic coil and the auxiliary switch; when a short-circuit fault occurs in the main circuit where the moving contact assembly is located, the auxiliary switch switches states and outputs a control signal to the control circuit board, and the control circuit board cuts off the power supply of the electromagnetic coil.

[0008] Further, the auxiliary switch is connected in series in the power supply circuit of the electromagnetic coil.

[0009] Further, the trigger member and the auxiliary switch are oppositely arranged and located on one side of the electromagnetic structure.

[0010] Further, the auxiliary yoke includes a pair of auxiliary yoke arms arranged side by side, and the auxiliary yoke arms cooperate with the auxiliary armature; when two or more sets of the quick-acting mechanisms are arranged side by side along the direction in which the two auxiliary yoke arms of the auxiliary yoke are arranged side by side, the adjacent two sets of quick-acting mechanisms share the trigger member and the auxiliary switch, and the trigger member and the auxiliary switch are located between the adjacent two sets of electromagnetic structures.

[0011] Further, the trigger member is arranged to move linearly.

[0012] Further, the auxiliary switch is a microswitch.

[0013] Further, the auxiliary armature is oppositely arranged with the auxiliary yoke and is arranged to move linearly.

[0014] Further, the trigger member is arranged on one side of the electromagnetic structure; the auxiliary armature is a U-shaped structure, which includes an auxiliary armature bottom and auxiliary armature arms, the two auxiliary armature arms are opposite and are respectively bent and connected to both ends of the auxiliary armature bottom, and the free ends of the two auxiliary armature arms are respectively in relative cooperation with the auxiliary yoke; the trigger member is driven by the auxiliary armature arms of the auxiliary armature to move.

[0015] Further, the trigger member includes a trigger member substrate, a trigger member body, and a trigger boss. One end of the trigger member body is connected to one side of the trigger member substrate, the trigger boss is arranged on the side of the trigger member body facing the auxiliary switch, and at least one end of the trigger member substrate serves as a driven part of the trigger member and extends into the space between an auxiliary armature arm of the auxiliary armature and the auxiliary yoke to be in transmission cooperation with the auxiliary armature arm.

[0016] Further, the auxiliary yoke is a U-shaped structure, which includes an auxiliary yoke bottom and auxiliary yoke arms, the two auxiliary yoke arms are opposite and are respectively bent and connected to both ends of the auxiliary yoke bottom, and the auxiliary conductor passes through the middle of the auxiliary yoke and is opposite to the auxiliary yoke bottom and is located between the two auxiliary yoke arms.

[0017] Further, the quick-acting device further includes a carrier mounting bin, the carrier mounting bin includes a mounting bin cavity arranged therein, the auxiliary armature and the auxiliary reset member are arranged in the mounting bin cavity, and the trigger member and the auxiliary switch are arranged outside the carrier mounting bin.

[0018] Further, the auxiliary reset member is an auxiliary reset spring, and the auxiliary reset spring is located within the U-shaped structure of the auxiliary armature and is disposed between the bottom of the auxiliary armature and the mounting chamber of the bearing portion; the free ends of the two auxiliary armature arms of the auxiliary armature pass through the wall of the mounting chamber of the bearing portion and cooperate with the auxiliary yoke.

[0019] Further, the mounting chamber of the bearing portion further includes a yoke guiding portion disposed within the mounting chamber of the bearing portion. The two yoke guiding portions respectively cooperate with a pair of inner side surfaces of the mounting chamber of the bearing portion to form two sets of yoke guiding and limiting structures, and each auxiliary armature arm is located between the yoke guiding portion of the corresponding yoke guiding and limiting structure and the inner side surface of the mounting chamber.

[0020] Further, the trunk of the triggering member is slidably engaged with the outer side of the wall of the mounting chamber of the bearing portion.

[0021] Further, the trunk of the triggering member includes a triggering member top plate and triggering member side plates. The triggering member top plate faces the triggering member substrate, and the two triggering member side plates face each other. One end of each is bent and connected to the triggering member top plate, and the other end is bent and connected to the triggering member substrate respectively;

[0022] The quick-acting mechanism further includes a triggering member reset member, and the triggering member reset member is a triggering member reset spring. The triggering member reset spring is located between the two triggering member side plates, and both ends thereof cooperate with the triggering member top plate and the wall of the mounting chamber of the bearing portion respectively.

[0023] Further, a spring mating groove is provided on the outer side of the wall of the mounting chamber of the bearing portion. One end of the spring mating groove is provided with a spring limiting platform. The triggering member reset spring is arranged in the spring mating groove, and one end thereof cooperates with the triggering member top plate and the other end cooperates with the spring limiting platform.

[0024] A circuit breaker includes the quick-acting device as described above; the circuit breaker includes at least one set of contact mechanisms, and each set of contact mechanisms corresponds to and cooperates with at least one set of quick-acting mechanisms. Each set of contact mechanisms includes a moving contact assembly and a static contact group for cooperative use.

[0025] Further, the circuit breaker includes a transmission frame, and the main armature is fixedly connected to the transmission frame and moves synchronously; the transmission frame is provided with mounting chambers of the bearing portion that correspond to and cooperate with the quick-acting mechanisms one by one. The auxiliary armature and the auxiliary reset member of the electromagnetic structure are arranged in the corresponding mounting chambers of the bearing portion, and the free ends of the two auxiliary armature arms of the auxiliary armature pass through the wall of the mounting chamber of the bearing portion and cooperate with the auxiliary yoke.

[0026] Further, the circuit breaker includes two or more sets of contact mechanisms arranged side by side in the width direction of the circuit breaker. One static contact of each set of static contact groups is a first static contact and each cooperates with one set of quick-acting mechanisms. The quick-acting mechanism that cooperates with the first static contact is a first quick-acting mechanism;

[0027] Two adjacent sets of the first quick-acting mechanisms share a trigger and an auxiliary switch, and the triggers and auxiliary switches of two adjacent sets of the first quick-acting mechanisms are located between two adjacent mounting bins of the bearing parts.

[0028] In the quick-acting device of the present invention, electrical isolation between the auxiliary switch and the main circuit where the moving contact assembly is located is achieved through the trigger, preventing short circuits between the power supply circuit of the electromagnetic coil and the main circuit where the moving contact assembly is located, and ensuring the reliability of the quick-acting device.

[0029] In addition, the layout of the quick-acting mechanisms is reasonable. When multiple quick-acting mechanisms are used side by side, adjacent quick-acting mechanisms can share the trigger and the auxiliary switch, which is beneficial to simplifying the structure and saving costs.

[0030] In addition, the cooperation mode of the auxiliary armature and the auxiliary yoke of the electromagnetic structure facilitates the layout and assembly of the quick-acting mechanism.

[0031] In the circuit breaker of the present invention, the quick-acting device realizes the short-circuit protection function and has high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a projection view of the circuit breaker of the present invention perpendicular to its width direction;

[0033] Figure 2 is the first exploded view of the circuit breaker of the present invention;

[0034] Figure 3 is the second exploded view of the circuit breaker of the present invention;

[0035] Figure 4 is the first sectional view of the circuit breaker of the present invention, in which the moving contact is disconnected from the static contact;

[0036] Figure 5 is the second sectional view of the circuit breaker of the present invention, in which the moving contact is closed with the static contact;

[0037] Figure 6 is a schematic structural diagram of the circuit breaker of the present invention with the housing removed, showing the connection relationship of the drive frame, the linkage rod and the moving contact assembly;

[0038] Figure 7 is a schematic structural diagram of the contact unit of the present invention;

[0039] Figure 8 is the third sectional view of the circuit breaker of the present invention, showing the assembly relationship between the quick-acting mechanism and the drive frame;

[0040] Figure 9 is of the present invention Figure 8 magnified schematic structural diagram of part P;

[0041] Figure 10It is the fourth sectional view of the circuit breaker of the present invention, and its trigger triggers the auxiliary switch to switch from the closed state to the open state;

[0042] Figure 11 It is a schematic structural diagram of the drive frame of the present invention;

[0043] Figure 12 It is a schematic structural diagram of the trigger of the present invention.

[0044] Description of reference numerals

[0045] 110 housing, 110c housing cover; 110b housing base; s1 upper region, s2 lower region, s20 contact region, s21 arc extinguishing region;

[0046] g drive frame guiding structure;

[0047] o operating device;

[0048] s200 electromagnetic system; 210 electromagnetic coil, 220 main yoke, 230 main armature;

[0049] 310 drive frame, 3100 drive frame bearing part, 3100c bearing part installation bin, 31000 installation bin cavity, 31001 yoke guiding part, 31002 installation bin opening, 3100g armature installation groove, 3101 drive frame linkage part, 31010 linkage part hole, 3102 return spring seat; 320 main reset part; 330 linkage rod;

[0050] d switching device;

[0051] c contact unit;

[0052] 400 unit housing, 400g unit housing guiding hole, 400p unit housing jack; 410 arc extinguishing chamber; 420 contact mechanism; 421 moving contact assembly; 4211 moving contact; 422 static contact group; 4220 static contact;

[0053] 500 quick-acting mechanism, 510-520 electromagnetic structure, 510 auxiliary yoke, 520 auxiliary armature, 530 auxiliary reset part, 540 trigger, 540b trigger body, 5400 trigger top plate, 5401 trigger base plate, 5402 trigger side plate, 5403 trigger boss, 5404 trigger receiving part, 550 trigger reset part, 560 auxiliary switch. Detailed implementation manners

[0054] The following embodiments given in conjunction with the drawings further illustrate the detailed implementation manners of the circuit breaker of the present invention. The circuit breaker of the present invention is not limited to the descriptions of the following embodiments.

[0055] As Figures 1 - 12FIG. 1 is an embodiment of a circuit breaker of the present invention. The circuit breaker of this embodiment is preferably a contactor type circuit breaker.

[0056] like Figures 2 - 6 As shown, the circuit breaker of this embodiment includes a housing 110, an operating device o disposed in the housing 110, and at least one group of switch devices d. The operating device o includes an electromagnetic system 200, a transmission frame 310, and a main reset member 320. The electromagnetic system 200 includes a coil assembly and a main armature 230 used in conjunction with each other. The coil assembly includes a main magnetic yoke 220 and an electromagnetic coil 210 sleeved on the main magnetic yoke 220. The main armature 230 is fixedly connected to the transmission frame 310 and moves synchronously. The main reset member 320 acts on the main armature 230 (directly or indirectly) to make it have a movement tendency to separate from the main magnetic yoke 220. Each group of switch devices d includes a contact unit c, and the contact unit c includes a contact mechanism 420. The contact mechanism 420 includes a movable contact assembly 421 and a static contact group 422 used in conjunction with each other. The transmission frame 310 is transmission-connected to the movable contact assembly 421. The electromagnetic system 200 is powered, that is, the electromagnetic system 200 is connected to the working power supply, and the coil assembly generates a magnetic field to make the main yoke 220 attract the main armature 230, and the main armature 230 drives the moving contact assembly 421 to move through the transmission frame 310, so that the moving contact assembly 421 and the static contact group 422 are closed, that is, the circuit breaker is closed; the electromagnetic system 200 is de-energized, that is, the working power supply of the electromagnetic system 200 is cut off, the magnetic field of the coil assembly disappears, the main reset member 320 drives the armature 230 to separate from the main yoke 220 and reset, and at the same time, the transmission frame 310 drives the moving contact assembly 421 and the static contact group 422 to disconnect, that is, the circuit breaker is opened.

[0057] Furthermore, the contact unit c also includes an arc extinguishing chamber 410 used in conjunction with the contact mechanism 420. Furthermore, the switch device d also includes a zero arcing mechanism 430, and the exhaust port of the arc extinguishing chamber 410 is connected to the outside through the zero arcing mechanism 430, that is, the gas exhausted from the arc extinguishing chamber 410 is discharged from the inside of the circuit breaker through the zero arcing mechanism 430 and enters the external environment where the circuit breaker is located; the zero arcing mechanism 430 cooperates with the arc extinguishing chamber 410 to ensure that the arc generated by the contact mechanism 420 is completely extinguished to prevent the arc from moving out of the circuit breaker.

[0058] like Figures 1 - 2 , 4-6, 8, and 10 are a layout of the circuit breaker of this embodiment:

[0059] like Figure 1As shown, in the projection perpendicular to the width direction of the circuit breaker, the housing 110 includes an upper area s1 and a lower area s2 arranged side by side along the height direction of the circuit breaker, and the lower area s2 includes a contact area s20 and an arc extinguishing area s21 arranged side by side along the length direction of the circuit breaker; the length direction, width direction and height direction of the circuit breaker are preferably the directions of the three coordinate axes of the three-dimensional coordinate system, that is, in space, the length direction, width direction and height direction of the circuit breaker are perpendicular to each other. The electromagnetic system 200 is arranged in the upper area s1, and the transmission frame 310 extends from the upper area s1 to the lower area s2 to be connected to the moving contact assembly 421 of each switch device d and drive the moving contact assembly 421 to move. In the switch device d, the contact unit c is arranged in the contact area s20, and the zero arcing mechanism 430 is arranged in the arc extinguishing area s21.

[0060] The circuit breaker of this embodiment adopts an operating device and a contact mechanism similar to those of a contactor, which greatly improves the service life; and its structural layout is reasonable and compact (especially the coil assembly, the main armature and the transmission frame are reasonably arranged and easy to assemble), which improves the utilization efficiency of the internal space of the circuit breaker. The various structures are independent of each other and easy to assemble. In addition, the combined use of the arc extinguishing chamber 410 and the zero arcing mechanism 430 significantly improves the arc extinguishing performance of the circuit breaker and prevents the arc from escaping the circuit breaker.

[0061] Further, such as Figure 2 As shown, the circuit breaker of this embodiment includes at least two groups of switch devices d, that is, the circuit breaker of this embodiment includes two or more groups of switch devices d, each switch device d is arranged side by side along the width direction of the circuit breaker and is arranged in the lower area s2. Specifically, the circuit breaker of this embodiment is a three-phase circuit breaker, which includes three groups of switch devices d arranged side by side along the width direction of the circuit breaker, and the three groups of switch devices d are arranged in the lower area s2. Those skilled in the art can adjust the number of switch devices d according to actual needs.

[0062] Further, such as Figure 2 , 4 As shown in , 5, the coil assembly, the main armature 230, and the transmission frame 310 are sequentially arranged along the height direction of the circuit breaker. Further, the main reset member 320 is a main reset spring, and four main reset springs are distributed at four vertices of a rectangle and arranged around the coil assembly, and the two ends of each main reset spring are respectively matched with the housing 110 and the transmission frame 310.

[0063] Further, such as Figure 4 and 5As shown, in the housing 110, two arc extinguishing regions s21 are respectively located on both sides of the contact region s20 in the length direction of the circuit breaker. That is, the housing 110 includes two arc extinguishing regions s21 and one contact region s20, and the two arc extinguishing regions s21 are located on both sides of the contact region s20 in the length direction of the circuit breaker; in the switching device d, the static contact group 422 includes two sets of static contacts 4220 arranged side by side in the length direction of the circuit breaker, and the two ends of the moving contact 4211 of the moving contact assembly 421 are synchronously closed and disconnected from the two sets of static contacts 4220 respectively. The two sets of arc extinguishing chambers 410 are respectively located on both sides of the contact mechanism 420 in the length direction of the circuit breaker, and the two sets of zero flashover mechanisms 430 cooperate with the two sets of arc extinguishing chambers 410 respectively (that is, the exhaust ports of the two sets of arc extinguishing chambers 410 are respectively communicated with the outside of the circuit breaker through the two sets of zero flashover mechanisms 430), and are respectively located on both sides of the contact unit c in the length direction of the circuit breaker and are respectively arranged in the two arc extinguishing regions s21. Specifically, the moving contact assembly 421 moves towards the static contact group 422 to make the moving contact 4211 close with the two sets of static contacts 4220, and the moving contact assembly 421 moves away from the static contact group 422 to make the moving contact 4211 disconnect from the two sets of static contacts 4220; each set of the switching device d includes two sets of arc extinguishing chambers 410 and two sets of zero flashover mechanisms 430. The two sets of arc extinguishing chambers 410 are located on both sides of the corresponding contact mechanism 420 in the length direction of the circuit breaker, and the two sets of zero flashover mechanisms 430 are located on both sides of the corresponding two sets of arc extinguishing chambers 410 in the length direction of the circuit breaker. That is, the two sets of zero flashover mechanisms 430 are located on both sides of the corresponding contact unit c in the length direction of the circuit breaker. Further, the electromagnetic system 200, the static contact group 422 and the moving contact assembly 421 are arranged side by side in sequence in the height direction of the circuit breaker. That is, in each set of the contact mechanisms 420, the static contact group 422 and the moving contact assembly 421 are arranged side by side in the height direction of the circuit breaker, and the static contact group 422 is located between the electromagnetic system 200 and the moving contact assembly 421.

[0064] Further, as Figure 3 and 6As shown, the drive frame 310 includes at least one set of drive frame linkage parts 3101 that are drivingly connected to the moving contact assembly 421. On both sides of the drive frame linkage part 3101, there are arrangement spaces for arranging the contact mechanism 420, that is, the drive frame linkage part 3101 and the contact mechanism 420 are arranged side by side. The drive frame linkage part 3101 and the switch device d are arranged side by side in the width direction of the circuit breaker. The drive frame linkage part 3101 is preferably drivingly connected to the moving contact assembly 421 of the switch device d through a linkage rod 330. The relative positional relationship between the drive frame linkage part and the contact mechanism facilitates the connection between the drive frame and the contact mechanism, and the assembly is simple; moreover, the drive frame linkage part and the moving contact assembly are drivingly connected through a linkage rod, with simple assembly and reliable transmission. Further, the circuit breaker in this embodiment includes at least two sets of switch devices d, and each switch device d is arranged side by side in the width direction of the circuit breaker. The drive frame 310 includes at least one drive frame linkage part 3101, and there is one drive frame linkage part 3101 between every two adjacent sets of switch devices d; in other words, the circuit breaker in this embodiment includes n switch devices d, n≥2, the drive frame 310 includes m drive frame linkage parts 3101, m≥1, and in this embodiment of the circuit breaker, m=n - 1 is preferably selected to ensure the balance of the force on the drive frame 310 and the synchronization of the closing and opening of each switch device d; of course, when n≥3, the value range of m can be [1, (n - 1)], that is, the value of m is not limited to n - 1. Or, the circuit breaker in this embodiment includes at least two sets of switch devices d, and each switch device d is arranged side by side in the width direction of the circuit breaker. The drive frame 310 includes two drive frame linkage parts 3101, and each switch device d is arranged between the two drive frame linkage parts 3101. The two drive frame linkage parts 3101 are both drivingly connected to the moving contact assembly 421 of each switch device d. Or, when the circuit breaker in this embodiment includes only one set of switch devices d, that is, when the circuit breaker is a single-phase circuit breaker (1P), the drive frame 310 includes two drive frame linkage parts 3101, and there is an arrangement space between the two drive frame linkage parts 3101, that is, the two drive frame linkage parts 3101 are located on both sides of a switch device d and are respectively drivingly connected to the moving contact assembly 421 of the switch device d.

[0065] Specifically, the circuit breaker in this embodiment includes three sets of switch devices d arranged side by side in the width direction of the circuit breaker. The drive frame 310 includes two drive frame linkage parts 3101 arranged side by side in the width direction of the circuit breaker. There is one drive frame linkage part 3101 between every two adjacent sets of switch devices d. Each switch device d and each drive frame linkage part 3101 are preferably drivingly connected to each other through a linkage rod 330.

[0066] Such as Figure 2 、 4As shown in FIG. -6, the circuit breaker of this embodiment further includes at least one set of quick-acting mechanism 500, which is used to cut off the power supply of the electromagnetic system 200 when a short-circuit fault occurs in the circuit where the corresponding switching device d is located (that is, the main circuit where the corresponding moving contact assembly 421 is located). Further, the quick-acting mechanism 500 is arranged side by side with the main armature 230 in the length direction of the circuit breaker, and each set of switching devices d is used in cooperation with at least one set of quick-acting mechanism 500.

[0067] The following is the first cooperation mode between the quick-acting mechanism 500 and the electromagnetic system 200:

[0068] The electromagnetic system 200 further includes a control circuit board, which is connected to the electromagnetic coil 210 of the electromagnetic system 200 for cutting off and restoring the power supply of the electromagnetic coil 210; each set of the quick-acting mechanism 500 includes an auxiliary switch 560, and the auxiliary switch 560 is connected to the control circuit board; when a short-circuit fault occurs in the circuit where the switching device d is located (that is, the main circuit where the corresponding moving contact assembly 421 is located), the auxiliary switch 560 switches its state (for example, the auxiliary switch 560 switches from the conducting state to the off state; or the auxiliary switch 560 switches from the off state to the conducting state; or the auxiliary switch 560 includes two-way contact structures, namely the first-way contact structure and the second-way contact structure, the first-way contact structure is a normally closed contact, and the second-way contact structure is a normally open contact, and the switching of the auxiliary switch 560 means that the normally closed contact is disconnected while the normally open contact is closed) and outputs a control signal to the control circuit board, and the control circuit board cuts off the power supply of the electromagnetic coil 210; after the short-circuit fault is eliminated, the auxiliary switch 560 resets, and then the control circuit board restores the power supply of the electromagnetic coil 210. The quick-acting mechanism 500 realizes the short-circuit protection function of the circuit breaker, and can quickly cut off the circuit when a short-circuit current appears in the circuit where the circuit breaker is located, so as to realize the short-circuit protection of other electrical equipment connected in the circuit; moreover, the auxiliary switch 560 is arranged on the transmission frame 310 on one side of the main armature 230, which can effectively shorten the connection line between the auxiliary switch 560 and the electromagnetic coil 210 of the electromagnetic system 200 and simplify the internal circuit layout of the circuit breaker; moreover, the quick-acting mechanism 500 has a simple structure and is convenient for assembly. Further, the auxiliary switch 560 of the quick-acting mechanism 500 is arranged on the transmission frame 310.

[0069] Further, in the circuit breaker of this embodiment, the control circuit board is also used to connect a remote communication control device (such as a host computer), and the remote communication control device can remotely conduct and cut off the power supply of the electromagnetic coil 210 through the control circuit board and monitor the power supply state of the electromagnetic coil 210, etc. Further, the control circuit board is arranged in the upper region s1 and is arranged side by side with the electromagnetic system 200; the control circuit board and the electromagnetic system 200 can be arranged side by side along the length direction of the circuit breaker or along the width direction of the circuit breaker.

[0070] In this embodiment, the circuit breaker preferably adopts the first cooperation mode of the quick-acting mechanism 500 and the electromagnetic system 200.

[0071] The following is the second cooperation mode of the quick-acting mechanism 500 and the electromagnetic system 200:

[0072] Each group of the quick-acting mechanisms 500 includes an auxiliary switch 560 connected in series in the power supply circuit of the electromagnetic system 200. That is, the closing and opening of the auxiliary switch 560 will cause the conduction and disconnection of the power supply circuit of the electromagnetic coil 210 of the electromagnetic system 200. The auxiliary switch 560 is a normally closed switch. That is, without considering factors other than the auxiliary switch 560, the power supply circuit of the electromagnetic system 200 remains in a conducting state; when a short-circuit fault occurs in the circuit where the switch device d is located (that is, the main circuit where the corresponding moving contact assembly 421 is located), the corresponding quick-acting mechanism 500 acts to trigger the auxiliary switch 560 to open, cut off the power supply circuit of the electromagnetic system 200, and cut off the power supply of the electromagnetic system 200. Then, the electromagnetic coil 210 stops generating a magnetic field, and the main armature 230 moves away from the main magnetic yoke 220 under the drive of the main resetting member 320. At the same time, the transmission frame 310 moves synchronously with the main armature 230 to drive the moving contact assemblies 421 of the respective switch devices d to disconnect from the static contact groups 422, and finally the circuit breaker trips.

[0073] Further, the quick-acting mechanism 500 further includes an electromagnetic structure 510-520. The electromagnetic structure 510-520 includes an auxiliary yoke 510, an auxiliary armature 520, and an auxiliary reset member 530. The auxiliary yoke 510 is disposed on the stationary contact set 422 of the corresponding switching device d. The auxiliary armature 520 is disposed on the transmission frame 310. The auxiliary reset member 530 acts on the auxiliary armature 520 to give it a tendency to move away from the auxiliary yoke 510, that is, the auxiliary reset member 530 applies a force to the auxiliary armature 520 to enable it to separate from the auxiliary yoke 510. The auxiliary armature 520 and the auxiliary yoke 510 are arranged side by side along the height direction of the circuit breaker. When a short-circuit fault occurs in the circuit where the switching device d is located, the auxiliary yoke 510 of the corresponding quick-acting mechanism 500 attracts the auxiliary armature 520 to move. The auxiliary armature 520 triggers the auxiliary switch 560 to switch states, and the auxiliary switch 560 outputs a control signal to the control circuit board, and the control circuit board cuts off the power supply of the electromagnetic system 200. Further, in the quick-acting mechanism 500, the auxiliary armature 520 is slidably disposed on the transmission frame 310, and it can move towards the auxiliary yoke 510 to be attracted to the auxiliary yoke 510 and can move in a direction away from the auxiliary yoke 510 to separate from the auxiliary yoke 510. Further, the quick-acting mechanism 500 further includes a trigger member 540 disposed on the transmission frame 310. The auxiliary armature 520 is in transmission cooperation with the trigger member 540 to drive the trigger member 540 to move. The trigger member 540 is used to trigger the auxiliary switch 560 to disconnect. The trigger member 540 is preferably made of an insulating material, and the insulating material can be an existing insulating material in the art. The auxiliary armature 520 triggers the auxiliary switch 560 through the trigger member 540, and the transmission is stable and reliable, which is convenient for the design of the transmission link and the internal layout. Moreover, the trigger member 540 is beneficial to increasing the insulation gap and creepage distance between the auxiliary switch 560 and the main circuit where the moving contact assembly is located (that is, the corresponding switching device d), avoiding short circuits between the power supply circuit of the electromagnetic coil and the main circuit where the moving contact assembly is located, ensuring the reliable operation of the quick-acting mechanism 500, and ensuring the reliability of the quick-acting device.

[0074] Further, the transmission frame 310 further includes a transmission frame bearing portion 3100 located between the coil assembly and the switching device d in the height direction of the circuit breaker. The main armature 230 of the electromagnetic system 200 is disposed on and fixedly connected to the transmission frame bearing portion 3100, so that the main armature 230 moves synchronously with the transmission frame 310. The auxiliary armature 520, the auxiliary reset member 530, and the auxiliary switch 560 of the quick-acting mechanism 500 are all disposed on the transmission frame bearing portion 3100. Further, the transmission frame 310 further includes a bearing portion installation bin 3100c corresponding to and cooperating with the quick-acting mechanism 500 one by one. The bearing portion installation bin 3100c is preferably disposed on the transmission frame bearing portion 3100. The auxiliary armature 520 and the auxiliary reset member 530 are both disposed in the bearing portion installation bin 3100c, and the auxiliary switch 560 is disposed outside the bearing portion installation bin 3100c. Further, the trigger member 540 is also disposed outside the bearing portion installation bin 3100c.

[0075] As an embodiment, the circuit breaker of this embodiment includes two or more groups of switching devices d arranged side by side in the width direction of the circuit breaker. The switching devices d correspond to and cooperate with the quick-acting mechanism 500 one by one. Each quick-acting mechanism 500 is arranged side by side in the width direction of the circuit breaker. Two adjacent groups of quick-acting mechanisms 500 share an auxiliary switch 560, and the auxiliary switch 560 is arranged between two bearing portion installation bins 3100c corresponding to and cooperating with the two adjacent groups of quick-acting mechanisms 500, which is beneficial to reducing the number of components of the circuit breaker and saving costs. Further, two adjacent groups of the quick-acting mechanisms 500 also share a trigger member 540 and a trigger member reset member 550 for driving the trigger member 540 to reset. The trigger member reset member 550 acts on the trigger member 540 to release the trigger state of the auxiliary switch 560, so that the auxiliary switch 560 is switched from the off state to the on state. Of course, each quick-acting mechanism 500 can also be provided with an independent auxiliary switch 560 and a trigger member 540 that are not shared with other quick-acting mechanisms 500, which will lead to an increase in the occupied space of the structure and an increase in production costs.

[0076] As an embodiment, the static contact 4220 is arranged and matched with the quick-acting mechanism 500 one by one. The two groups of quick-acting mechanisms 500 matched with the static contact group 422 of the same set of switch devices d are respectively arranged on both sides of the main armature 230, which also means that the bearing part installation bins 3100c matched with the two groups of quick-acting mechanisms 500 are also respectively arranged on both sides of the main armature 230. Further, in the length direction of the circuit breaker in this embodiment, among the multiple quick-acting mechanisms 500 located on the same side of the main armature 230, two adjacent groups of quick-acting mechanisms 500 share an auxiliary switch 560, and the auxiliary switch 560 is located between the two bearing part installation bins 3100c respectively matched with the two adjacent groups of quick-acting mechanisms 500. Specifically, in the circuit breaker of this embodiment, each set of switch devices d is correspondingly arranged and matched with two groups of quick-acting mechanisms 500, that is, the circuit breaker includes three sets of switch devices d and six groups of quick-acting mechanisms 500. Among them, three groups of quick-acting mechanisms 500 are arranged side by side in the width direction of the circuit breaker and are located on one side of the main armature 230 in the length direction of the circuit breaker, and the other three groups of quick-acting mechanisms 500 are arranged side by side in the width direction of the circuit breaker and are located on the other side of the main armature 230 in the length direction of the circuit breaker; that is, the two sides of the main armature 230 in the length direction of the circuit breaker are the first side and the second side respectively. Three groups of quick-acting mechanisms 500 are located on the first side and are arranged side by side in the width direction of the circuit breaker, and the other three groups of quick-acting mechanisms 500 are located on the second side and are arranged side by side in the width direction of the circuit breaker.

[0077] The following will be combined with Figures 2 - 6 Figures 8-11 to further describe the operating device o.

[0078] As Figures 2 - 3 shown, the main yoke 220 of the operating device o is an E-shaped yoke, which includes three main yoke arms arranged side by side at intervals. The electromagnetic coil 210 is sleeved on the main yoke arm located in the middle; the main armature 230 of the operating device o includes three main armature mating bosses arranged side by side at intervals, and the three main armature mating bosses are respectively matched with the three main yoke arms; the main yoke 220 and the main armature 230 with the above structure enable the main armature 230 to act faster under the attraction of the coil assembly and ensure the reliability of the attracted state of the main yoke 220 and the main armature 230.

[0079] As Figure 3 Figures 6As shown in 10-11, in the transmission frame 310, the transmission frame linkage part 3101 is arranged on one side of the transmission frame bearing part 3100, and the two sides of the transmission frame linkage part 3101 are respectively provided with arrangement spaces for arranging the contact mechanism 420, that is, the contact mechanism 420 can be arranged on both sides of the transmission frame linkage part 3101, and preferably one group of contact mechanisms 420 is arranged in each arrangement space, and of course two or more contact mechanisms 420 can also be arranged, that is, two groups or more contact mechanisms 420 can be arranged on each side of the transmission frame linkage part 310. Further, the transmission frame 310 includes at least two groups of transmission frame linkage parts 3101, that is, the transmission frame 310 includes two groups or more transmission frame linkage parts 3101, each transmission frame linkage part 3101 is preferably arranged side by side along the width direction of the circuit breaker and is respectively connected to the transmission frame bearing part 3100, and an arrangement space is arranged between two adjacent transmission frame linkage parts 3101, and one arrangement space is arranged on both sides of the two transmission frame linkage parts 3101 located at both ends. Further, the transmission frame linkage part 3101 is a straight plate structure. Specifically, in the circuit breaker of this embodiment, the transmission frame 310 includes two groups of transmission frame linkage parts 3101, the two groups of transmission frame linkage parts 3101 are arranged side by side along the width direction of the circuit breaker, a group of contact mechanisms 420 are arranged between the two groups of transmission frame linkage parts 3101, and a group of contact mechanisms 420 are arranged on both sides of the two groups of transmission frame linkage parts 3101, that is, the contact mechanisms 420 and the transmission frame linkage parts 3101 are arranged alternately in sequence, and each transmission frame linkage part 3101 and the moving contact assembly 421 of each contact mechanism 420 are connected to each other through the linkage rod 330. Further, each group of the transmission frame linkage parts 3101 is provided with a linkage part hole 31010 for the linkage rod 330 to pass through, and preferably, the two linkage part holes 31010 are arranged side by side and spaced along the length direction of the circuit breaker. The connection method of the transmission frame 310 and the moving contact assembly 421 is simple, easy to assemble, and simplified in operation.

[0080] like Figure 3 and 8As shown, the operating device o further includes a driving frame guiding structure g corresponding to the driving frame linkage part 3101 one by one. The driving frame guiding structure g is arranged on the housing structure for accommodating the contact mechanism 420. The driving frame linkage part 3101 is in sliding and limiting cooperation with the driving frame guiding structure g, that is, the driving frame linkage part 3101 can slide relative to the driving frame guiding structure g, and the limiting between the driving frame linkage part 3101 and the driving frame guiding structure g enables the driving frame linkage part 3101 to slide only along the extending direction of the driving frame guiding structure g. Further, the driving frame guiding structure g is a driving frame guiding hole, and the driving frame linkage part 3101 is slidably inserted into the driving frame guiding hole. Further, the driving frame guiding hole is arranged at the adjacent seam between two adjacent contact units c and is formed by the relative splicing of the linkage part guiding grooves respectively arranged on the unit housings 400 of the two adjacent contact units c. As another embodiment, when the contact unit c does not have the unit housing 400, the adjacent contact units c are separated by a partition plate arranged in the outer shell 110, then the driving frame guiding structure g can be arranged on the partition plate of the outer shell 110 for separating the adjacent contact units c.

[0081] As Figures 2 - 6 shown in FIGS. 8-9 and 11, the driving frame bearing part 3100 further includes a bearing part installation bin 3100c corresponding to and cooperating with the quick-acting mechanism 500 one by one. The bearing part installation bin 3100c includes an installation bin cavity 31000 arranged therein. The auxiliary armature 520 and the auxiliary resetting part 530 of the quick-acting mechanism 500 are arranged in the installation bin cavity 31000. Specifically, in the driving frame 310 of this embodiment, three bearing part installation bins 3100c are arranged side by side along the width direction of the circuit breaker and are located on one side of the armature installation groove 3100g in the length direction of the circuit breaker, and the other three bearing part installation bins 3100c are arranged side by side along the width direction of the circuit breaker and are located on the other side of the armature installation groove 3100g in the length direction of the circuit breaker; that is, in the length direction of the circuit breaker of this embodiment, three bearing part installation bins 3100c are arranged on each side of the armature installation groove 3100g.

[0082] Further, two installation bin openings 31002 are arranged on the bin wall of the bearing part installation bin 3100c for the two auxiliary armature arms of the auxiliary armature 520 to pass through and cooperate with the auxiliary magnetic yoke 510. Further, the bearing part installation bin 3100c includes a pair of opposite installation bin side walls and an installation bin bottom wall whose two ends are respectively bent and connected to the two installation bin side walls. One installation bin opening 31002 is arranged at the bent connection part of each installation bin side wall and the installation bin bottom wall. As another embodiment, the two installation bin openings 31002 can also be arranged at the ends where the installation bin bottom wall is respectively connected to the two installation bin side walls.

[0083] Furthermore, the load-bearing portion mounting bin 3100c also includes a yoke guide portion 31001 disposed in the load-bearing portion mounting bin 3100c, and the two yoke guide portions 31001 are arranged side by side and spaced apart and respectively cooperate with a pair of mounting bin inner side surfaces (that is, the inner side surfaces of the two mounting bin side walls) of the load-bearing portion mounting bin 3100c to form two sets of yoke guide limiting structures, and each auxiliary armature arm is located between the yoke guide portion 31001 of the corresponding yoke guide limiting structure and the mounting bin inner side surface, thereby limiting the movement of the auxiliary yoke 520 along the direction in which its two auxiliary yoke arms are side by side, ensuring the stable relative position of the auxiliary yoke 520 and the auxiliary armature 510, thereby achieving reliable cooperation.

[0084] Furthermore, a spring matching groove is provided on the outer side of the chamber wall of the bearing portion installation chamber 3100c, and a spring stopper is provided at one end of the spring matching groove. The trigger member reset spring is arranged in the spring matching groove, and one end is matched with the trigger member top plate 5400 of the trigger member 540 and the other end is matched with the spring stopper. Furthermore, the cross section of the spring matching groove is an arc. In two adjacent bearing portion installation chambers 3100c, spring matching grooves are provided on the outer sides of the two adjacent chamber walls. The two spring matching grooves are matched with each other to form a spring accommodating chamber for accommodating the trigger member reset spring, and the radial ends of the trigger member reset spring are respectively located in the two spring matching grooves.

[0085] like Figure 3 , 6 As shown in FIG. 7 , the contact unit c further includes a unit housing 400 , which serves as a housing structure for accommodating a contact mechanism 420 . Furthermore, the unit housing 400 is also used to accommodate an arc extinguishing chamber 410 .

[0086] Further, the unit housing 400 further includes a unit housing guide hole 400g, which is used for the linkage rod 300 to be inserted into the contact unit c and to be transmission-connected with the corresponding moving contact assembly 421. Further, the unit housing guide hole 400g is arranged on the side wall of the unit housing 400 facing the transmission frame linkage part 3101 of the transmission frame 310, and the unit housing guide hole 400g is preferably a waist-shaped hole, which matches the moving track of the linkage rod 300.

[0087] Furthermore, the unit housing 400 further includes a unit housing insertion hole 400p, through which the auxiliary yoke arm of the auxiliary yoke 510 of the quick-action mechanism 500 passes to cooperate with the corresponding auxiliary armature 520. Furthermore, the unit housing insertion hole 400p is disposed on the side wall of the unit housing 400 facing the electromagnetic system 200.

[0088] Further, the unit housing 400 further includes a linkage part guiding groove which is arranged on the outer side surface of the unit housing 400 facing the linkage part 310 of the transmission frame 310; the linkage part guiding grooves of two adjacent unit housings 400 are oppositely joined together along the width direction of the circuit breaker to form a transmission frame guiding structure g.

[0089] For the circuit breaker of the present invention, the contact unit c is provided with an independent unit housing 400, which is beneficial to improving the insulation performance between phases of the circuit breaker, enhancing the internal insulation performance of the circuit breaker, thereby improving the current-carrying and breaking capacity of the circuit breaker. Moreover, the contact unit c being assembled as an independent module is beneficial to improving the assembly efficiency of the circuit breaker. Further, the outer housing 110 includes an outer housing cover 110c and an outer housing base 110b which are oppositely joined together along the height direction of the circuit breaker. An upper region s1 and a lower region s2 are formed in the space formed by the outer housing cover 110c and the outer housing base 110b. The upper region s1 is preferably arranged in the outer housing cover 110c, and the lower region s2 is preferably arranged in the outer housing base 110b. Further, the electromagnetic system 200 is arranged in the outer housing cover 110c, the transmission frame 310 extends from the outer housing cover 110c into the outer housing base 110b, and the switching device d is arranged in the outer housing base 110b.

[0090] Certainly, the circuit breaker of the present invention may not be provided with an independent unit housing 400, but instead a partition structure for separating each contact unit c is provided in the outer housing 110. Correspondingly, the support guiding groove 400s, the static contact partition wall and the transmission frame guiding structure g are arranged on the partition structure: for example, the outer housing 110 may adopt an upper-middle-lower structure form, that is, it includes an upper shell, a middle shell and a lower shell which are sequentially joined together along the height direction of the circuit breaker. An upper region s1 is formed between the upper shell and the middle shell, and a lower region s2 is formed between the middle shell and the lower shell. Further, when the circuit breaker includes at least two groups (that is, two groups or more than two groups) of switching devices d, a partition structure for separating adjacent switching devices d is provided in the lower region s2, and the partition structure is arranged on the middle shell and / or the lower shell; of course, those skilled in the art can adopt other deformation structures according to needs, which will not be elaborated here and all should fall within the protection scope of the present invention.

[0091] The following will be combined with Figures 2 - 7 Figures 8-11 to further illustrate the quick-acting mechanism 500.

[0092] The quick-acting mechanism 500 includes an auxiliary conductor, electromagnetic structures 510-520, a trigger 540, a trigger reset member 550, and an auxiliary switch 560. The electromagnetic structures 510-520 include an auxiliary yoke 510, an auxiliary armature 520, and an auxiliary reset member 530. The auxiliary conductor passes through the middle of the auxiliary yoke 520 and is used to be connected in series with the main circuit where the moving contact assembly 421 of the corresponding switch device d is located. The auxiliary yoke 510 cooperates with the auxiliary armature 520, and the auxiliary reset member 530 acts on the auxiliary armature 520 to separate it from the auxiliary yoke 510. That is, the auxiliary reset member 530 applies a force to the auxiliary armature 520, and this force causes the auxiliary armature 520 to have a tendency to move away from the auxiliary yoke 510. The trigger reset member 550 is used to drive the trigger 540 to reset so that the trigger 540 no longer triggers the auxiliary switch 560, thereby switching the auxiliary switch 560 from the open state to the closed state; when a short-circuit current flows through the auxiliary conductor, that is, when a short-circuit fault occurs in the circuit where the switch device d corresponding to the quick-acting mechanism 500 is located, the magnetic field generated by the auxiliary conductor attracts the auxiliary armature 520 through the auxiliary yoke 510 to make the auxiliary armature 520 move. The auxiliary armature 520 drives the trigger 540 to move, and the trigger 540 triggers the auxiliary switch 560 to open, that is, triggers the auxiliary switch 560 to switch from the closed state to the open state. Further, the auxiliary armature 520 and the auxiliary reset member 530 are arranged in the mounting bin 3100c of the bearing part, the trigger 540 and the auxiliary switch 560 are arranged outside the mounting bin 3100c of the bearing part, and the trigger reset member 550 is also arranged outside the mounting bin 3100c of the bearing part.

[0093] As another embodiment, the quick-acting mechanism 500 does not provide the trigger reset member 550, but the auxiliary armature 520 drives the trigger 540 to reciprocate to trigger the auxiliary switch 560 or release the auxiliary switch 560 to cancel the triggering of the auxiliary switch 560.

[0094] Further, the auxiliary conductor is served by the static contact 4220 of the corresponding switch device d.

[0095] Further, the auxiliary switch 560 is preferably a micro switch. However, the auxiliary switch 560 is not limited to a micro switch only. For example, the auxiliary switch 560 can also be an auxiliary moving contact and an auxiliary static contact used in cooperation, and the auxiliary moving contact is in transmission cooperation with the trigger 540.

[0096] Further, the auxiliary armature 520 is disposed opposite to the auxiliary yoke 510, and the auxiliary armature 520 is linearly movable. Specifically, the auxiliary armature 520 is linearly movable along the height direction of the circuit breaker. The cooperation mode of the auxiliary armature and the auxiliary yoke facilitates the layout and assembly of the quick-acting mechanism 500, and simplifies the cooperation of the quick-acting mechanism 500 with the corresponding switch device d and the transmission frame 310. As another embodiment, the auxiliary armature 520 may also be rotatably disposed.

[0097] Specifically, the auxiliary armature 520 has a U-shaped structure, which includes an auxiliary armature bottom and auxiliary armature arms. The two auxiliary armature arms are opposite and are respectively bent and connected to both ends of the auxiliary armature bottom. The free ends of the two auxiliary armature arms are respectively matched with the auxiliary yoke 510. The free ends of the auxiliary armature arms pass through the wall of the corresponding bearing part installation bin 3100c to cooperate with the auxiliary yoke 520. Preferably, the free ends of the auxiliary armature arms pass through the installation bin opening 31002 of the corresponding bearing part installation bin 3100c to cooperate with the auxiliary yoke 520. The auxiliary yoke 510 has a U-shaped structure, which includes an auxiliary yoke bottom and auxiliary yoke arms. The two auxiliary yoke arms are opposite and are respectively bent and connected to both ends of the auxiliary yoke bottom. The auxiliary conductor (served by the corresponding static contact 4220) passes through the middle of the auxiliary yoke 510, and is opposite to the auxiliary yoke bottom and is located between the two auxiliary yoke arms. The free ends of the two auxiliary armature arms of the auxiliary armature 520 are respectively matched with the free ends of the two auxiliary yoke arms of the auxiliary yoke 510.

[0098] Further, the auxiliary reset member 530 is preferably an auxiliary reset spring. The auxiliary reset spring is located between the auxiliary armature bottom of the auxiliary armature 520 and the bottom wall of the bearing part installation bin 3100c, and both ends of the auxiliary reset spring are respectively matched with the corresponding auxiliary armature bottom and the bearing part installation bin 3100c.

[0099] Further, the trigger member 540 is linearly movable or rotatably disposed. In this embodiment, it is preferably linearly movable, which saves more space. Further, the trigger member 540 is driven by the auxiliary armature arm of the auxiliary armature 520 to move. Specifically, the trigger member 540 is linearly movable along the height direction of the circuit breaker, and is driven by the auxiliary armature arm of the auxiliary armature 520 to move.

[0100] Specifically, the trigger member 540 includes a trigger member base plate 5401, a trigger member body 540b, and a trigger boss 5403. One end of the trigger member body 540b is connected to one side of the trigger member base plate 5401. The trigger boss 5403 is disposed on the side of the trigger member body 540b facing the auxiliary switch 560. At least one end of the trigger member base plate 5401 serves as a trigger member actuating portion 5404 and extends between an auxiliary armature arm of the auxiliary armature 520 and the auxiliary yoke 510, and is in transmission cooperation with the auxiliary armature arm. Further, when two or more sets of the quick-acting mechanisms 500 are arranged side by side along the direction of the two auxiliary yoke arms of the auxiliary yoke 510 (i.e., the width direction of the circuit breaker), the adjacent two sets of quick-acting mechanisms 500 share the trigger member 540 and the auxiliary switch 560, and the trigger member 540 and the auxiliary switch 560 are located between the adjacent two electromagnetic structures 510-520. Both ends of the trigger member base plate 5401 are trigger member actuating portions 5404 and cooperate with the auxiliary yokes 520 of the two quick-acting mechanisms 500 arranged side by side. Further, the trigger member body 540b includes a trigger member top plate 5400 and trigger member side plates 5402. The trigger member top plate 5402 is opposite to the trigger member base plate 5401. The two trigger member side plates 5402 are opposite to each other. One end is bent and connected to the trigger member top plate 5400 and the other end is respectively bent and connected to the trigger member base plate 5401. The trigger member top plate 5400, the trigger member base plate 5401, and the trigger member side plates 5402 form an overall square frame structure. Preferably, both ends of the trigger member side plates 5402 protrude on both sides of the two trigger member side plates 5402 as two trigger member actuating portions 5404. The trigger boss 5403 is disposed on the outer side of one trigger member side plate 5402 (i.e., the side of the trigger member side plate 5402 away from the other trigger member side plate 5402). Further, the auxiliary member reset member 550 is a trigger member reset spring. The trigger member reset spring is placed in the middle of the trigger member body 540b, with one end cooperating with the trigger member top plate 5400 and the other end cooperating with the spring limiting platform of the corresponding bearing portion installation bin 3100c. Further, the auxiliary armature arm of the auxiliary armature 520 is provided with an avoidance notch for avoiding the trigger member actuating portion 5404. The trigger member actuating arm 5404 is located in the avoidance notch, so that the auxiliary armature arm of the auxiliary armature 50 can contact the auxiliary yoke 510, enabling the two to be reliably closed.

[0101] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which it is usually placed during use. It is only for the convenience of description and does not indicate that the indicated device or element must have a specific orientation. Therefore, it should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating relative importance.

[0102] The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A quick-acting device, which includes a quick-acting mechanism (500) and an electromagnetic system (200). The electromagnetic system (200) includes a coil assembly used in cooperation and a main armature (230) for driving the moving contact assembly (421) to act to close and disconnect from the corresponding static contact group (422). The coil assembly includes a main yoke (220) and an electromagnetic coil (210). The quick-acting mechanism (500) includes an electromagnetic structure (510 - 520) and an auxiliary switch (560); the electromagnetic structure (510 - 520) includes an auxiliary yoke (510) and an auxiliary armature (520) used in cooperation, an auxiliary conductor that is connected in series with the main circuit where the moving contact assembly (421) is located and passes through the middle of the auxiliary yoke (510), and an auxiliary reset member (530) for driving the auxiliary armature (520) to separate from the auxiliary yoke (520); It is characterized in that: The quick-acting mechanism (500) further includes a trigger member (540) driven by the auxiliary armature (520) to move; when a short-circuit fault occurs in the main circuit where the moving contact assembly (421) is located, the electromagnetic structure (510 - 520) triggers the auxiliary switch (560) to switch states through the trigger member (540), so that the power supply to the electromagnetic coil (210) is cut off.

2. The quick-acting device according to claim 1, It is characterized in that: The electromagnetic system (200) further includes a control circuit board respectively connected to the electromagnetic coil (210) and the auxiliary switch (560); when a short-circuit fault occurs in the main circuit where the moving contact assembly (421) is located, the auxiliary switch (560) switches states and outputs a control signal to the control circuit board, and the control circuit board cuts off the power supply to the electromagnetic coil (210).

3. The quick-acting device according to claim 1, It is characterized in that: The auxiliary switch (560) is connected in series in the power supply circuit of the electromagnetic coil (210).

4. The quick-acting device according to claim 1, It is characterized in that: The trigger member (540) and the auxiliary switch (560) are oppositely arranged and are located on one side of the electromagnetic structure (510 - 520).

5. The quick-acting device according to claim 4, It is characterized in that: The auxiliary yoke (510) includes a pair of auxiliary yoke arms arranged side by side, and the auxiliary yoke arms cooperate with the auxiliary armature (510); when two or more groups of the quick-acting mechanisms (500) are arranged side by side along the direction in which the two auxiliary yoke arms of the auxiliary yoke (510) are arranged side by side, the adjacent two groups of quick-acting mechanisms (500) share the trigger member (540) and the auxiliary switch (560), and the trigger member (540) and the auxiliary switch (560) are located between the adjacent two groups of electromagnetic structures (510 - 520).

6. The quick-acting device according to claim 1, It is characterized in that: The trigger member (540) is arranged to move linearly.

7. The quick-acting device according to claim 1, It is characterized in that: The auxiliary switch (560) is a micro switch.

8. The quick-acting device according to claim 1, It is characterized in that: The auxiliary armature (520) is oppositely arranged with the auxiliary yoke (510) and is arranged to move linearly.

9. The quick-acting device according to claim 8, characterized in that: the trigger member (540) is arranged on one side of the electromagnetic structure (510-520); the auxiliary armature (520) is of a U-shaped structure, which includes an auxiliary armature bottom and auxiliary armature arms. The two auxiliary armature arms are opposite and are respectively bent and connected to both ends of the auxiliary armature bottom. The free ends of the two auxiliary armature arms are respectively in relative cooperation with the auxiliary yoke; the trigger member (540) is driven to move by the auxiliary armature arms of the auxiliary armature (520); the trigger member (540) includes a trigger member substrate (5401), a trigger member body (540b), and a trigger boss (5403). One end of the trigger member body (540b) is connected to one side of the trigger member substrate (5401). The trigger boss (5403) is arranged on the side of the trigger member body (540b) facing the auxiliary switch (560). At least one end of the trigger member substrate (5401) serves as a driven part (5404) of the trigger member and extends into the space between an auxiliary armature arm of the auxiliary armature (520) and the auxiliary yoke (510) to be in transmission cooperation with this auxiliary armature arm; the auxiliary yoke (510) is of a U-shaped structure, which includes an auxiliary yoke bottom and auxiliary yoke arms. The two auxiliary yoke arms are opposite and are respectively bent and connected to both ends of the auxiliary yoke bottom. The auxiliary conductor passes through the middle of the auxiliary yoke (510) and is opposite to the auxiliary yoke bottom and is located between the two auxiliary yoke arms; the quick-acting device further includes a carrier mounting bin (3100c). The carrier mounting bin (3100c) includes a mounting bin cavity (31000) arranged therein. The auxiliary armature (520) and the auxiliary reset member (530) are arranged in the mounting bin cavity (31000), and the trigger member (540) and the auxiliary switch (560) are arranged outside the carrier mounting bin (3100c); the auxiliary reset member (530) is an auxiliary reset spring. The auxiliary reset spring is located inside the U-shaped structure of the auxiliary armature (520) and is arranged between the auxiliary armature bottom and the carrier mounting bin (3100c); the free ends of the two auxiliary armature arms of the auxiliary armature (520) pass through the bin wall of the carrier mounting bin (3100c) to cooperate with the auxiliary yoke (510); the carrier mounting bin (3100c) further includes a yoke guiding part (31001) arranged inside the carrier mounting bin (3100c). The two yoke guiding parts (31001) respectively cooperate with a pair of inner sides of the mounting bin of the carrier mounting bin (3100c) to form two groups of yoke guiding and limiting structures. Each auxiliary armature arm is located between the yoke guiding part (31001) of the corresponding yoke guiding and limiting structure and the inner side of the mounting bin; the trigger member body (540b) is in sliding cooperation with the outer side of the bin wall of the carrier mounting bin (3100c); The trigger body (540b) includes a trigger top plate (5400) and trigger side plates (5402). The trigger top plate (5400) faces the trigger base plate (5401). The two trigger side plates (5402) face each other, with one end of each bent and connected to the trigger top plate (5400) respectively and the other end of each bent and connected to the trigger base plate (5401) respectively; The quick-acting mechanism (500) further includes a trigger reset member (550). The trigger reset member (550) is a trigger return spring. The trigger return spring is located between the two trigger side plates (5402), and both ends cooperate with the trigger top plate (5400) and the wall of the bearing part installation bin (3100c) respectively; A spring mating groove is provided on the outer side of the wall of the bearing part installation bin (3100c). One end of the spring mating groove is provided with a spring limiting platform. The trigger return spring is arranged in the spring mating groove, with one end cooperating with the trigger top plate (5400) and the other end cooperating with the spring limiting platform.

10. A circuit breaker, characterized in that: The circuit breaker includes the quick-acting device according to any one of claims 1-9; the circuit breaker includes at least one set of contact mechanisms (420). Each set of contact mechanisms (420) corresponds to and cooperates with at least one set of quick-acting mechanisms (500). Each set of contact mechanisms (420) includes a moving contact assembly (420) and a static contact group (422) for cooperative use; The circuit breaker includes a transmission frame (310). The main armature (230) is fixedly connected to the transmission frame (310) and moves synchronously; the transmission frame (310) is provided with bearing part installation bins (3100c) corresponding to and cooperating with the quick-acting mechanisms (500). The auxiliary armature (520) and the auxiliary reset member (530) of the electromagnetic structure (510-520) are arranged in the corresponding bearing part installation bins (3100c). The free ends of the two auxiliary armature arms of the auxiliary armature (520) pass through the wall of the bearing part installation bin (3100c) to cooperate with the auxiliary yoke (510); The circuit breaker includes two or more sets of contact mechanisms (420) arranged side by side in the width direction of the circuit breaker. One static contact (4220) of each set of static contact groups (422) is a first static contact and each cooperates with one set of quick-acting mechanisms (500). The quick-acting mechanism (500) cooperating with the first static contact is the first quick-acting mechanism; The adjacent two sets of the first quick-acting mechanisms share a trigger (540) and an auxiliary switch (560). The trigger (540) and the auxiliary switch (560) of the adjacent two sets of the first quick-acting mechanisms are located between the adjacent two bearing part installation bins (3100c).

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