Operating mechanism and circuit breaker

Abstract

The operating mechanism comprises a pair of supports and a draw bar, a push rod and a lock catch are rotatably assembled between the supports, the push rod is used for driving a moving contact assembly, the draw bar is rotatably assembled and is adjacent to the lock catch, the operating mechanism further comprises an electromagnetic mechanism and a pull rod, and the pull rod is slidably arranged between the supports and is in sliding fit with the lock catch. The pull rod is connected between the push rod and the electromagnetic mechanism in a linkage mode, the pull rod drives the push rod to conduct opening and closing swing, during closing, the electromagnetic mechanism drives the pull rod to move to the closing position, the pull rod is matched with the lock catch in a limiting mode, and during opening, the traction rod rotating during opening triggers the lock catch to rotate in an unlocking mode, so that the lock catch and the pull rod are released in the limiting mode firstly; and the pull rod moves to an opening position. According to the utility model, the electromagnetic mechanism drives the pull rod to be respectively matched with the push rod and the lock catch for closing and is limited at the closing position, so that the closing speed is improved, excessive connecting rod structures are prevented from being arranged, the overall structure of the operating mechanism is simplified, and the problems of high failure rate and difficulty in maintenance and replacement are avoided.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliances, specifically to an operating mechanism and a circuit breaker. Background Technology

[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions, and closing, carrying, and interrupting current under abnormal circuit conditions within a specified time. The operating mechanisms used to achieve opening and closing in circuit breakers are generally divided into manual operating mechanisms and electric operating mechanisms. Existing electric operating mechanisms have the following drawbacks: First, when the operating mechanism is driven by a motor and gear set, the relatively long output rotation of the motor and the transmission time of the gear set result in a long closing cycle and insufficient response. Second, the operating mechanism has a large number of linkage structures, leading to complex structure, high failure rate, short service life, and difficulty in maintenance and replacement. Third, when the operating mechanism is driven by an electromagnetic mechanism for automatic opening and closing, the linear movement or angular oscillation of the electromagnetic mechanism requires transmission components. The transmission components have complex structures and diverse trajectories, making the overall size of the operating mechanism too large, which is not conducive to reducing the overall size of the circuit breaker. Summary of the Invention

[0003] The purpose of this utility model is to overcome at least one defect of the prior art and to provide an operating mechanism and a circuit breaker.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This utility model provides an operating mechanism, including a pair of supports and a traction rod. A push rod and a latch are rotatably mounted between the pair of supports. The push rod drives a moving contact assembly. The traction rod is rotatably mounted adjacent to the latch. The mechanism also includes an electromagnetic mechanism and a pull rod. The pull rod is slidably disposed between the pair of supports and slidably engaged with the latch. The pull rod is linked between the push rod and the electromagnetic mechanism, and the pull rod drives the push rod to perform opening and closing oscillation.

[0006] When the circuit is closed, the electromagnetic mechanism drives the pull rod to move to the closed position, and the pull rod engages with the locking latch for limiting.

[0007] When the circuit breaker is opened, the traction rod that rotates to open the circuit breaker triggers the latch to unlock and rotate, causing the latch to first release its limiting engagement with the pull rod, and then the pull rod moves to the open position.

[0008] Preferably, the electromagnetic mechanism includes a coil assembly, a moving iron core, and a stationary iron core. The moving iron core is slidably disposed at one end of the coil assembly and connected to the pull rod. The stationary iron core is fixed at the other end of the coil assembly. The moving iron core and the stationary iron core are spaced apart and opposite to each other. The electromagnetic force generated by the electromagnetic mechanism provides the closing driving force for the pull rod. The movement trajectory of the pull rod is a straight line.

[0009] Preferably, a sliding limiting structure is provided between the pull rod and the bracket, and / or a sliding limiting structure is provided between the pull rod and the buckle, wherein the sliding limiting structure restricts the movement trajectory of the pull rod.

[0010] Preferably, it also includes a micro switch, which is fixed on the bracket. When the lever moves to the open position and / or the closed position, the micro switch is triggered to provide feedback on the position of the lever.

[0011] Preferably, the latch has a locking groove and an unlocking part, and the pull rod has a locking part in the middle.

[0012] When the circuit is closed and the lever is moved to the closed position, the locking part engages with the locking groove for a limiting fit;

[0013] When the circuit breaker is opened, the traction rod triggers the unlocking part to drive the latch to unlock and rotate. After the locking part is released from the limiting engagement with the locking groove, the locking part slides into the locking groove until the traction rod moves to the open position.

[0014] Preferably, a locking elastic element is connected between the latch and the pull rod. When the pull rod moves to the closed position, the elastic force of the locking elastic element will limit the locking part in the locking groove.

[0015] Preferably, the locking groove includes a strip area and a recessed area. The recessed area is connected to the end of the strip area away from the push rod, so that one side wall of the locking groove forms a stepped surface. The strip area slides with the locking part to limit the movement stroke of the pull rod. When the pull rod moves to the closed position, the locking part is limited by the recessed area.

[0016] Preferably, the bracket is provided with a locking mounting shaft, the locking buckle is rotatably mounted on the locking mounting shaft, and the pull rod is provided with a limiting groove for the locking mounting shaft to pass through.

[0017] Preferably, the latch has a first connecting part at one end near the push rod, the pull rod has a second connecting part at one end near the push rod, and the two ends of the locking elastic member are respectively connected to the first connecting part and the second connecting part.

[0018] Preferably, the end of the pull rod away from the electromagnetic mechanism is provided with a linkage shaft, the middle part of the push rod is rotatably connected between a pair of brackets, and each end of the push rod is provided with a linkage groove. The linkage shaft is linked to one linkage groove and slides with the bracket, while the other linkage groove is used to drive the rotating shaft of the moving contact assembly.

[0019] Preferably, the pull rod includes two spaced-apart connecting walls, one end of which is connected to form a connecting end. The connecting end is provided with at least one mounting part, which is fixedly connected to the electromagnetic mechanism. Each connecting wall has a linkage hole at the end away from the mounting part. A linkage shaft for connecting with the push rod is installed in the linkage hole. Each connecting wall has a strip-shaped limiting groove and a through hole in the middle. The through hole is located between the limiting groove and the linkage hole. A shaft serving as a locking part is installed in the through hole. The edge of the connecting wall away from the mounting part protrudes outward to form a connecting protrusion and is provided with a limiting groove. A shaft serving as a second connecting part is provided in the limiting groove.

[0020] Preferably, the latch includes two spaced-apart mating walls, with one side edge of the two mating walls connecting to form a U-shaped latch body. The latch body has space for sliding engagement with the pull rod. One end plate of the mating wall has a connecting hole through which a latch mounting shaft mounted on the bracket passes. The other end edge of the mating wall extends outward to form an extension portion. The extension portion has a shaft hole, in which a shaft serving as a first connecting portion is fitted. The end of the first connecting portion serves as an unlocking portion. The middle of the mating wall has a locking groove, which includes a strip-shaped area and a recessed area. The recessed area is located near the connecting hole, and the recessed area forms a stepped surface on the side of the locking groove near the extension portion. The strip-shaped area slides with the pull rod, and the recessed area is used to lock the pull rod.

[0021] This utility model also provides a circuit breaker, including a housing, and at least one contact system is provided inside the housing. The contact system includes a moving contact assembly and a stationary contact that cooperate with each other, and also includes the operating mechanism as described above.

[0022] Furthermore, the moving contact assembly includes a rotating shaft and a moving contact. The rotating shaft is rotatably mounted inside the housing, and the moving contact is connected to the rotating shaft. A tripping spring is also connected between the rotating shaft and the housing. After the latch and the pull rod are released from their limiting engagement, the tripping spring drives the rotating shaft to rotate and trip.

[0023] Furthermore, at least one accessory module is also provided inside the housing, which triggers the traction rod to rotate and drive the contact system to open.

[0024] The operating mechanism and circuit breaker of this utility model are driven by an electromagnetic mechanism to pull rods that cooperate with push rods and latches to close the circuit and limit it to the closed position, thereby improving the closing speed. The opening is achieved by the cooperation of pull rods, traction rods and latches, avoiding the need for too many linkage structures, simplifying the overall structure of the operating mechanism and avoiding problems such as high failure rate and difficulty in maintenance and replacement.

[0025] In addition, the pull rod is linked with the push rod and the electromagnetic mechanism, and its movement trajectory is a straight line, which occupies less space.

[0026] Furthermore, by configuring a microswitch, the position of the lever can be fed back by the microswitch, thus accurately reflecting the opening and closing status of the circuit breaker with high precision. In addition, by setting a locking elastic element between the latch and the lever, the locking elastic element works together to lock the lever and the latch in the closed position, further improving the closing stability.

[0027] In addition, by configuring accessory modules to work with the traction rod, multiple functional units can be provided for the circuit breaker, which can easily meet different functional requirements and has a wide range of applications. Attached Figure Description

[0028] Figure 1 This is a top view of the circuit breaker of this utility model;

[0029] Figure 2 This is the cross-section of the circuit breaker of this utility model. Figure 1 ;

[0030] Figure 3 This is the cross-section of the circuit breaker of this utility model. Figure 2 ;

[0031] Figure 4 This is a schematic diagram showing the cooperation between the operating mechanism, the electromagnetic mechanism, and the contact system in this utility model;

[0032] Figure 5 This is a schematic diagram of the cooperation between the pull rod, push rod, and lock in this utility model (closed position);

[0033] Figure 6 This is a schematic diagram showing the cooperation of the pull rod, push rod, lock, and traction rod in this utility model;

[0034] Figure 7 This is a schematic diagram of the tie rod in this utility model;

[0035] Figure 8 This is a schematic diagram of the locking mechanism in this utility model;

[0036] Figure 9 This is a schematic diagram of the push rod structure in this utility model;

[0037] Figure 10This is a schematic diagram of the traction rod in this utility model;

[0038] Figure 11 This is a schematic diagram of the structure of the rotating shaft in this utility model;

[0039] Figure label:

[0040] 1-Outer shell, 20-Bracket, 201-Lock mounting shaft, 202-Push rod mounting shaft, 203-Rock arm mounting shaft, 21-Lock, 210-Lock body, 211-Locking groove, 2111-Strip area, 2112-Recessed area, 212-Unlocking part, 213-First connecting part, 216-Extension part, 217-Shaft hole, 22-Push rod, 221-First linkage groove, 222-Second linkage groove, 23-Traction rod, 231-First trigger part, 232-Disengagement trigger part, 233-Third trigger part, 234-Fourth trigger part, 235-Fifth trigger part, 24-Pull rod, 240-Limiting slide groove, 241-Locking part 242-Linkage hole, 243-Second connection part, 244-Mounting part, 245-Connecting protrusion, 246-Limiting slot, 247-Through hole, 25-Linkage shaft, 261-Locking elastic element, 27-Handle, 28-Rock arm, 29-Electromagnetic mechanism, 291-Moving iron core, 292-Stationary iron core, 293-Coil assembly, 31-Moving contact assembly, 311-Rotating shaft, 3111-Triggering pull part, 312-Moving contact, 32-Stationary contact, 33-Triggering spring, 4-Arc extinguishing system, 5-Electromagnetic instantaneous trip unit, 6-Magnetic flux trip unit, 7-Manual trip button, 8-Control module, 91-Current transformer, 92-Zero sequence transformer. Detailed Implementation

[0041] The specific embodiments of the operating mechanism and circuit breaker of this utility model are further described below with reference to the accompanying drawings. The operating mechanism and circuit breaker of this utility model are not limited to the descriptions in the following embodiments.

[0042] like Figure 1-3 As shown, the circuit breaker includes a housing 1, within which an operating mechanism and at least one circuit breaker pole are provided. Each circuit breaker pole includes a pair of terminals, and a contact system is connected between the pair of terminals. The contact system includes a moving contact assembly 31 and a stationary contact 32 that cooperate with each other. The operating mechanism drives the moving contact assembly 31 to contact or separate from the stationary contact 32, thereby connecting or disconnecting the main line of each circuit breaker pole. An arc extinguishing system 4 is also provided on one side of the contact system, which cooperates to extinguish the arc generated by the contact system during disconnection.

[0043] Specifically, such as Figure 4 , 6As shown, the operating mechanism includes a pair of spaced-apart brackets 20 and a rotatably mounted traction rod 23. A rocker arm 28 and a push rod 22 are rotatably mounted between the pair of brackets 20. The rocker arm 28 is linked to the push rod 22, which drives the moving contact assembly 31 in the circuit breaker to swing open and close. The rocker arm 28 is usually also connected to a handle 27, which allows for manual opening and closing. A latching structure is rotatably mounted between the pair of brackets 20 and is linked to the push rod 22. The latching structure usually includes a trip latch and a locking latch 21. The traction rod 23 is adjacent to the locking latch 21. In the closed state, the locking latch 21 is locked, keeping the operating mechanism in a balanced state. When the traction rod 23 is triggered to rotate, it drives the locking latch 21 to unlock and rotate. At this time, the latching structure is released, and the push rod 22 drives the moving contact assembly 31 to rotate open.

[0044] Furthermore, such as Figure 3 , 4 As shown, at least one accessory module can also be configured inside the housing 1. The accessory module works with the traction rod 23 to trigger the tripping of the operating mechanism. The accessory module has one or more functional units, providing additional functional units for the circuit breaker to meet different usage requirements and has a wide range of applications. The accessory module can be a manually operated functional unit, such as a manual trip button 7, which drives the traction rod 23 to rotate by pressing. The accessory module can also be a remotely controlled functional unit, such as a magnetic flux trip device 6 or an electromagnetic instantaneous trip device 5. In this case, the accessory module is connected to the control module 8. The controller of the control module 8 outputs a control signal to drive its action, thereby driving the traction rod 23 to rotate. The control module 8 can be configured inside the housing 1 or it can be another control device.

[0045] like Figure 2-6 As shown, the improvement of this application is that the latch structure is no longer provided. Instead, a latch 21 is rotatably assembled between a pair of brackets 20. The operating mechanism also includes an electromagnetic mechanism 29 and a pull rod 24. The pull rod 24 is slidably disposed between the pair of brackets 20 and slidably engaged with the latch 21. The pull rod 24 is linked between the push rod 22 and the electromagnetic mechanism 29. The pull rod 24 drives the push rod 22 to swing open and close. When closing, the electromagnetic mechanism 29 drives the pull rod 24 to move to the closed position. The pull rod 24 is limited to the latch 21. When opening, the traction rod 23 of the opening rotation triggers the latch 21 to unlock and rotate, so that the latch 21 first releases the limited engagement with the pull rod 24, and then the pull rod 24 moves to the opening position.

[0046] In this way, the electromagnetic mechanism 29 drives the pull rod 24 to cooperate with the push rod 22 and the latch 21 to close the circuit and limit it to the closed position, which improves the closing speed. The pull rod 24, the traction rod 23 and the latch 21 cooperate to open the circuit, avoiding the need for too many linkage structures, simplifying the overall structure of the operating mechanism and avoiding problems such as high failure rate and difficulty in maintenance and replacement.

[0047] Specifically, such as Figure 2-4 As shown, the electromagnetic mechanism 29 includes a coil assembly 293, a moving iron core 291, and a stationary iron core 292. The moving iron core 291 is slidably disposed at one end of the coil assembly 293 and connected to the pull rod 24. The stationary iron core 292 is fixed at the other end of the coil assembly 293. The moving iron core 291 and the stationary iron core 292 are spaced apart and opposite each other. When the coil assembly 293 is energized, the electromagnetic force generated by the electromagnetic mechanism 29 provides the driving force for the pull rod 24 to close the circuit. That is, the gap between the moving iron core 291 and the stationary iron core 292 generates a magnetic field. This magnetic field drives the moving iron core 291 to move in a straight line toward the stationary iron core 292. The pull rod 24 is also driven by the moving iron core 291 to move in a straight line.

[0048] like Figure 2-8 As shown in Figure 10, the latch 21 is provided with a locking groove 211 and an unlocking part 212. A locking part 241 is provided in the middle of the pull rod 24. When the circuit is closed and the pull rod 24 moves to the closed position, the locking part 241 engages with the locking groove 211 to lock the latch 21 and the pull rod 24 together. When the circuit is opened, the traction rod 23 triggers the unlocking part 212 to drive the latch 21 to unlock and rotate. The locking part 241 first releases the locking groove 211 from its limiting engagement, and then slides with the locking groove 211 until the pull rod 24 moves to the open position. Preferably, as shown in Figure 10, the latch 21 is provided with a locking groove 211 and an unlocking part 212. Figure 5 , 6 As shown, a locking elastic element 261 is also connected between the latch 21 and the pull rod 24. When the pull rod 24 moves to the closing position, the locking part 241 is locked in the locking groove 211 by the elastic force of the locking elastic element 261, which further improves the closing stability of the operating mechanism.

[0049] Furthermore, a sliding limiting structure is provided between the pull rod 24 and the bracket 20, and / or a sliding limiting structure is provided between the pull rod 24 and the latch 21. The sliding limiting structure restricts the movement trajectory of the pull rod 24. Preferably, the pull rod 24 and the latch 21 slide against each other. Preferably, the latch 21 has at least a partial engagement space, and the pull rod 24 slides within the engagement space of the latch 21. For example, the latch 21 has a U-shaped groove, which serves as the engagement space, and at least the locking part 241 of the pull rod 24 is located in the U-shaped groove. In this configuration, the overall thickness of the latch 21 and the pull rod 24 during the sliding process is less than the total thickness of the latch 21 and the pull rod 24. When the locking part 241 slides with the latch 21, the latch 241 is driven to move in a straight line. Therefore, the sliding process of the locking part 241 with the latch 21 during opening or closing can be considered as a telescopic movement relative to the latch 21. This improves the stability of the latch 21 and the pull rod 24 while ensuring that the movement trajectory of the pull rod 24 is linear, and avoids occupying too much space. Alternatively, the latch 21 can be configured without a mating space, with the pull rod 24 and the latch 21 stacked together. The locking part 241 extends from the outside of the latch 21 and engages with the locking groove 211 of the latch 21. In this configuration, the overall thickness of the two components during the sliding process is at least the sum of the thicknesses of the latch 21 and the pull rod 24.

[0050] Combination Figure 1-11 A specific embodiment of an operating mechanism is provided.

[0051] like Figure 4-6 As shown, the operating mechanism includes a pair of brackets 20, a pull rod 24, and a traction rod 23. A latch 21 and a push rod 22 are rotatably mounted between the pair of brackets 20. The pull rod 24 is slidably mounted between the pair of brackets 20. The latch 21 and the pull rod 24 are slidably engaged. When the circuit is closed, the latch 21 and the pull rod 24 are locked and limited. When the circuit is open, the latch 21 is first driven to unlock and rotate, so that after the latch 21 and the pull rod 24 are unlocked and limited, the pull rod 24 can slide and engage with the latch 21 until the pull rod 24 moves to the open position. One end of the pull rod 24 is linked to one end of the push rod 22 through a linkage shaft 25. The linkage shaft 25 is preferably slidably mounted between the brackets 20 and the push rod 22. The push rod 22 is used to connect with the moving contact assembly 31 in the circuit breaker. When the drive rod 24 slides between the closed and open positions, it can correspondingly drive the push rod 22 to swing open or close. The traction rod 23 can be supported between a pair of brackets 20 or set in the circuit breaker outside the pair of brackets 20. The traction rod 23 is rotatably mounted adjacent to the latch 21. The traction rod 23 triggers the latch 21 to unlock and rotate. After the pull rod 24 and the latch 21 are unlocked, they move to the open position. Correspondingly, the push rod 22 also moves to the open position, thereby driving the moving contact assembly 31 to open.

[0052] like Figure 2-4 As shown, in this embodiment, an electromagnetic mechanism 29 is also provided. The pull rod 24 is linked between the electromagnetic mechanism 29 and the push rod 22. The electromagnetic mechanism 29 drives the pull rod 24 to move to the closing position, and the electromagnetic force drives the operating mechanism to close the circuit, thereby improving the closing speed.

[0053] Specifically, the electromagnetic mechanism 29 can adopt an existing structure, such as... Figure 4 As shown, the electromagnetic mechanism 29 includes a coil assembly 293, a moving iron core 291, and a stationary iron core 292. The coil assembly 293 includes a coil frame and a coil wound around the outside of the coil frame. The stationary iron core 292 is fixedly disposed at one end of the coil frame, and the moving iron core 291 is slidably disposed at the other end of the coil assembly 293 and spaced apart from the stationary iron core 292. In this embodiment, the stationary iron core 292 is an E-shaped structure with three connecting arms. The connecting arm located in the middle position passes through the middle of the coil frame, and the other two connecting arms are respectively along the coil assembly 293. The outer side of the 3 is extended, and the length of the three connecting arms of the stationary iron core 292 is equal to the axial length of the coil frame, so that the stationary iron core 292 and the end of the coil assembly 293 facing the moving iron core 291 are kept flush. In this way, the moving iron core 291 and the stationary iron core 292 have a larger contact surface. When the coil is energized, a magnetic field is generated between the moving iron core 291 and the stationary iron core 292. This magnetic field drives the moving iron core 291 to move in a straight line towards the stationary iron core 292. The pull rod 24 is fixedly connected to the moving iron core 291, and is also driven to move in a straight line.

[0054] Among them, such as Figure 2-8 As shown, the latch 21 has a locking groove 211 and an unlocking part 212. The middle part of the pull rod 24 has a locking part 241, and the traction rod 23 has a tripping trigger part 232. When the circuit is closed, the locking part 241 is in a limiting engagement with the locking groove 211. When the circuit is open, the tripping trigger part 232 of the traction rod 23 triggers the unlocking part 212 to unlock the latch 21, thereby causing the locking part 241 to first release the limiting engagement with the locking groove 211. Then, the locking part 241 slides along the locking groove 211 until the pull rod 24 moves to the open position. In this embodiment, the locking groove 211 is located in the middle of the latch 21. The locking groove 211 includes a strip area 2111 and a recessed area 2112. The recessed area 2112 is linked to the end of the strip area 2111 away from the push rod 22, so that one side wall of the locking groove 211 forms a stepped surface. When the pull rod 24 slides with the latch 21, the strip area 2111 slides with the locking part 241, and the locking part 241 is limited by the recessed area 2112. In this embodiment, the locking part 241 is a shaft provided on the pull rod 24.

[0055] Furthermore, such as Figure 5 , 6As shown, a locking elastic element 261 is connected between the latch 21 and the pull rod 24. When the pull rod 24 moves to the closed position, the elastic force of the locking elastic element 261 engages to confine the locking part 241 within the locking groove 211. In this embodiment, the locking elastic element 261 is a tension spring. The latch 21 has a first connecting part 213 at one end near the push rod 22, and the pull rod 24 has a second connecting part 243 at one end near the push rod 22. The two ends of the locking elastic element 261 are respectively connected to the first connecting part 213 and the second connecting part 243. When the circuit is closed, the elastic force of the locking elastic element 261 engages to confine the locking part 241 within the locking groove 211. 1. The locking part 241 is located within the locking groove 211. When the locking part 241 is at the critical position between the strip area 2111 and the recessed area 2112, the deformation of the locking elastic member 261 is the largest. Correspondingly, the distance between the first connecting part 213 and the second connecting part 243 is the largest, and the tension of the locking elastic member 261 is the largest. When the locking part 241 falls into the recessed area 2112, the deformation of the locking elastic member 261 is slightly smaller than the deformation at the critical position. This ensures that the locking elastic member 261 can limit the locking part 241 in the recessed area 2112, and does not interfere with the locking buckle 21 being locked by the locking elastic member 261 when it is unlocked and rotated.

[0056] In this embodiment, a sliding limiting structure is provided between the pull rod 24 and the latch 21 and the bracket 20 respectively. The sliding limiting structure restricts the movement trajectory of the pull rod 24. Typically, the sliding limiting structure is a strip groove and a shaft that is slidably set in the strip groove.

[0057] Specifically in this embodiment, such as Figure 4-6As shown, a latch mounting shaft 201 and a push rod mounting shaft 202 are provided between a pair of brackets 20. The latch 21 is rotatably mounted on the latch mounting shaft 201. In this embodiment, the latch 21 rotates around the latch mounting shaft 201 to unlock. The push rod 22 is rotatably mounted on the push rod mounting shaft 202 and rotates around the push rod mounting shaft 202 to open and close the circuit. A limiting groove 240 is provided in the middle of the pull rod 24. The latch mounting shaft 201 passes through the limiting groove 240 and the limiting groove 240 is provided. The groove 240 provides a certain sliding space for the locking mounting shaft 201. The locking buckle 21 has a mating space, and the pull rod 24 is slidably assembled within the mating space of the locking buckle 21. When the pull rod 24 slides linearly relative to the locking buckle 21, the locking mounting shaft 201, the limiting groove 240, the locking part 241, and the strip area 2111 together restrict the movement trajectory of the pull rod 24. In this embodiment, the relative linear sliding of the pull rod 24 and the locking buckle 21 can be understood as the pull rod 24 and the locking buckle 21 mating. The telescopic movement specifically involves the following: In the open position, the locking part 241 and the latch mounting shaft 202 are located in the strip area 2111 and the limit slide groove 240 near the push rod 22, respectively. At this time, most of the pull rod 24 (the area between the end of the pull rod 24 near the push rod 22 and the end of the limit slide groove 240 away from the push rod 22) is located within the mating space, which is equivalent to the pull rod 24 retracting into the latch 21. During the closing process, the locking part 241 and the latch mounting shaft 202 move towards the strip area 2111 and the limit slide groove 240, respectively. When the end of the limiting slide groove 240 away from the push rod moves, a portion of the pull rod 24 (the area between the end of the pull rod 24 near the push rod 22 and the end of the limiting slide groove 240 near the push rod 22) is located within the mating space. This is equivalent to the pull rod 24 being pulled out of the latch 21. In addition, the pull rod 24 is located within the mating space, so that the overall thickness of the pull rod 24 and the latch 21 is less than the sum of the thicknesses of the two components during the relative sliding process, making the overall structure smaller and avoiding occupying too much internal space.

[0058] Furthermore, such as Figure 4-6 As shown in Figure 9, the end of the pull rod 24 away from the electromagnetic mechanism 29 is provided with a linkage shaft 25, and each end of the push rod 22 is provided with a linkage groove. The linkage shaft 25 is linked to one linkage groove of the push rod 22, and the other linkage groove of the push rod 22 is linked to the moving contact assembly 31. The linkage shaft 25 slides between a pair of brackets 20. Preferably, a strip-shaped sliding groove is provided on the bracket 20 so that the linkage shaft 25 slides linearly along the strip-shaped sliding groove. Therefore, in this embodiment, the linkage shaft 25 and the strip-shaped sliding groove of the bracket 20, the locking part 241 and the strip area 2111 of the locking groove 211, and the locking mounting shaft 201 and the limiting sliding groove 240 of the pull rod 24 can be considered as a sliding limiting structure for limiting the movement of the pull rod 24.

[0059] Preferably, it also includes at least one micro switch, which can be fixed on the bracket 20 or fixed inside the circuit breaker housing. The micro switch corresponds at least to the outer side of one end of the strip groove of the bracket 20. When the lever 24 moves to the open position and / or the closed position, the micro switch is triggered to provide feedback on the position of the lever 24, thereby providing feedback on the open or closed status of the circuit breaker.

[0060] In addition, in this embodiment, a rocker arm 28 can also be configured. The rocker arm 28 is rotatably mounted on the bracket 20. The rocker arm 28 is connected to a handle 27. The rocker arm 28 is linked to the push rod 22 to realize manual operation.

[0061] In this embodiment, in addition to the tripping unlocking part 212, the traction rod 23 may also be equipped with other triggering parts for cooperation with other accessory modules in the circuit breaker, thereby driving the operating mechanism to trip. The triggering part of the traction rod 23 can adopt existing technology.

[0062] Combination Figure 2-6 8 provides a latch 21 structure applicable to this embodiment. The latch 21 includes two spaced-apart mating walls. One side edge of the two mating walls is connected to form a U-shaped latch body 210. The space between the two mating walls of the latch body 210 forms a mating space, which provides a sliding mating space for the pull rod 24, facilitating the storage of the pull rod 24 in the latch 21. One end plate of the mating wall is provided with a connecting hole 215, through which the latch mounting shaft 201 assembled on the bracket 20 passes. The other end edge of the mating wall extends outward to form an extension 216. Figure 8 In the middle, the extension 216 extends downward to the latch 21. The extension 216 is provided with a shaft hole 217. A shaft rod serving as the first connecting part 213 is installed in the shaft hole 217. One end of the locking elastic member 261 is located between the two mating walls and connected to the first connecting part 213. The end of the first connecting part 213 serves as the unlocking part 212. The middle part of the mating wall is provided with a locking groove 211. The locking groove 211 includes a strip area 2111 and a recessed area 2112. The recessed area 2112 is located at one end near the connecting hole 215, and the recessed area 2112 makes the side of the locking groove 211 near the extension 216 form a stepped surface. The strip area 2111 slides with the pull rod 24, and the recessed area 2112 is used to lock the pull rod 24.

[0063] Combination Figure 2-6 7 provides a structure for the pull rod 24 applied in this embodiment, such as Figure 7 As shown, the pull rod 24 includes two spaced-apart connecting walls, one end of which is connected to form a connecting end, and the connecting end is provided with at least one mounting part 244. Figure 7In the design, there are two mounting parts 244, with a space between the two mounting parts 244 for fixing the moving iron core 291. Each mounting part 244 is fixedly connected to the moving iron core 291. Each connecting wall has a linkage hole 242 at one end away from the mounting part 244. A linkage shaft 25 for connecting with the push rod 22 is installed in the linkage hole 242. Each connecting wall has a strip-shaped limiting groove 240 and a through hole 247 in the middle. The through hole 247 is located between the limiting groove 240 and the linkage hole 242. A shaft serving as a locking part 241 is installed in the through hole 247. The edge of the connecting wall away from the mounting part 244 protrudes outward to form a connecting protrusion 245 and has a limiting groove 246. A shaft serving as a second connecting part 243 is installed in the limiting groove 246.

[0064] Combination Figure 2-6 9 provides a push rod 22 structure applicable to this embodiment.

[0065] like Figure 9 As shown, the push rod 22 is a rod with a certain degree of curvature. A hole for connecting to the push rod mounting shaft 202 is provided in the middle of the push rod 22. A linkage groove is provided at each end of the push rod 22. Each linkage groove is a strip groove. For ease of description, the two linkage grooves are divided into a first linkage groove 221 and a second linkage groove 222. The first linkage groove 221 has a larger axial length, and the inner diameter of the end of the first linkage groove 221 away from the second linkage groove 222 is slightly increased, so that the first linkage groove 221 presents an irregular strip groove, which facilitates the first linkage groove 221 to cooperate with the linkage shaft 25.

[0066] Combination Figure 2-6 10 provides a structure for the traction rod 23 used in this embodiment.

[0067] like Figure 10As shown, the traction rod 23 has a rod-like structure. One side of the rod 23 has a bent rod serving as a release trigger 232. Each release trigger 232 engages with an unlocking part 212 of the latch 21. In this embodiment, there are two unlocking parts 212, and correspondingly, there are also two release triggers 232. Multiple triggers are also provided in the middle of the traction rod 23, and each trigger is an extending plane. For ease of description, these multiple triggers are referred to as a first trigger 231, a third trigger 233, a fourth trigger 234, and a fifth trigger 235. The first trigger 231 extends along the traction rod 23... The first trigger part 231 and the second trigger part 232 are axially spaced apart, and the first trigger part 231 and the second trigger part 232 correspond to opposite sides of the traction rod 23. The third trigger part 233 and the fifth trigger part 235 are both located between two adjacent first trigger parts 231. The extension plane of the third trigger part 233 is approximately perpendicular to the extension plane of the first trigger part 231. The fifth trigger part 235 forms a boss structure. The fourth trigger part 234 and the second trigger part 232 are located on the same side of the traction rod 23, and the fourth trigger part 234 is located at one end of the traction rod 23. The fourth trigger part 234 and the first trigger part 231 extend approximately in opposite directions along the same plane.

[0068] Combination Figure 1-5 A specific structure of a circuit breaker is provided.

[0069] like Figure 1 As shown, the circuit breaker includes a housing 1. Typically, the housing 1 consists of a base and a cover that fits onto the base. The cover has a handle hole in the middle for the handle 27 to pass through. The circuit breaker poles are disposed in the base. Preferably, a partition is disposed in the base, separating two adjacent circuit breaker poles. The operating mechanism is disposed between the circuit breaker poles and the cover. In the electromagnetic mechanism 29, the moving iron core 291 moves linearly between the cover and the base, so that the movement trajectory of the pull rod 24 and the moving iron core 291 is parallel to the surface of the cover with the handle hole. The traction rod 23 spans all the circuit breaker poles. The first trigger part 231 of the traction rod 23 corresponds to one circuit breaker pole, and the first trigger part 231 and the fifth trigger part 235 extend toward the base. The plane where the third trigger part 233 is located is parallel to the surface of the cover with the handle hole, and the fourth trigger part 234 extends toward the cover.

[0070] The structure of each circuit breaker pole can adopt existing technology, that is, each circuit breaker pole includes a pair of spaced-apart terminals, each terminal is located at one end of the base and corresponds to the wiring port of the base, and a contact system is connected between the pair of terminals. The contact system includes a cooperating moving contact assembly 31 and a stationary contact 32, wherein the moving contact assembly 31 includes a rotating shaft 311 and a moving contact 312, the rotating shaft 311 is rotatably disposed within the base, one end of the stationary contact 32 is spaced apart from the moving contact 312, and the other end extends toward the adjacent terminal, such as... Figure 1-4 As shown in Figure 11, the rotating shaft 311 has a protrusion that serves as a tripping pull part 3111, and a tripping spring 33 is connected between the tripping pull part 3111 and the base. Figure 1-4 In the circuit, the opening spring 33 is a tension spring. When the push rod 22 is pulled to the opening position, the opening spring 33 works in conjunction with the rotating shaft 311 to pull the moving contact 312 away from the stationary contact 32. An arc extinguishing system 4 is also provided on one side of the contact system. The arc extinguishing system 4 can adopt existing technology.

[0071] Furthermore, such as Figure 1 The housing 1 shown also contains a control module 8 and an accessory module. The control module 8 includes a circuit board and a controller mounted on the circuit board. The housing 1 also contains a current transformer 91 and a zero-sequence transformer 92 for feeding back current signals to the controller. The controller outputs control signals to the electromagnetic mechanism 29 and the accessory module according to the received current signals and control commands, so that the electromagnetic mechanism 29 and the accessory module can operate according to the control signals.

[0072] In this embodiment, the accessory module includes an electromagnetic instantaneous trip unit 5, a magnetic flux trip unit 6, and a manual trip button 7. These accessory modules utilize existing technology. The electromagnetic instantaneous trip unit 5 is installed within each circuit breaker pole and connected to the main line of each pole. In the figure, the electromagnetic instantaneous trip unit 5 is located in the base, and its armature engages with the first trigger part 231 of the traction rod 23. The magnetic flux trip unit 6 is mounted on the cover. Preferably, the cover has a corresponding accessory slot, and the moving component of the magnetic flux trip unit 6 engages with the fourth trigger part 234. The manual trip button 7 is slidably mounted on the cover. By pressing the manual trip button 7, the third trigger part 233 is triggered. Thus, the accessory module drives the traction rod 23 to rotate, which in turn drives the latch 21 to unlock and rotate, thereby opening the circuit breaker. Of course, the accessory module can also be configured with another functional unit to cooperate with the fifth trigger unit 235.

[0073] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used during use. They are only for ease of description and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0074] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. An operating mechanism comprising a pair of supports (20) and a traction rod (23), wherein a push rod (22) and a latch (21) are rotatably mounted between the pair of supports (20), the push rod (22) being used to drive a moving contact assembly (31), and the traction rod (23) being rotatably mounted and adjacent to the latch (21), characterized in that: It also includes an electromagnetic mechanism (29) and a pull rod (24). The pull rod (24) is slidably disposed between a pair of brackets (20) and slidably engaged with a latch (21). The pull rod (24) is linked between the push rod (22) and the electromagnetic mechanism (29). The pull rod (24) drives the push rod (22) to swing open and close the brake. When the circuit is closed, the electromagnetic mechanism (29) drives the pull rod (24) to move to the closed position, and the pull rod (24) engages with the latch (21) for limiting. When the circuit breaker is opened, the traction rod (23) that rotates to open the circuit breaker triggers the latch (21) to unlock and rotate, so that the latch (21) first releases the limiting engagement with the pull rod (24), and then the pull rod (24) moves to the opening position.

2. The operating mechanism according to claim 1, characterized in that: The electromagnetic mechanism (29) includes a coil assembly (293), a moving iron core (291), and a stationary iron core (292). The moving iron core (291) is slidably disposed at one end of the coil assembly (293) and connected to the pull rod (24). The stationary iron core (292) is fixed at the other end of the coil assembly (293). The moving iron core (291) and the stationary iron core (292) are spaced apart and opposite to each other. The electromagnetic force generated by the electromagnetic mechanism (29) provides the closing driving force for the pull rod (24). The movement trajectory of the pull rod (24) is a straight line.

3. The operating mechanism according to claim 2, characterized in that: A sliding limiting structure is provided between the pull rod (24) and the bracket (20), and / or a sliding limiting structure is provided between the pull rod (24) and the buckle (21), the sliding limiting structure restricting the movement trajectory of the pull rod (24).

4. The operating mechanism according to claim 3, characterized in that: It also includes a micro switch, which is fixed on the bracket (20). When the lever (24) moves to the open position and / or the closed position, the micro switch is triggered to provide feedback on the position of the lever (24).

5. The operating mechanism according to any one of claims 1-4, characterized in that: The latch (21) is provided with a locking groove (211) and an unlocking part (212), and the middle part of the pull rod (24) is provided with a locking part (241). When the circuit is closed and the lever (24) moves to the closed position, the locking part (241) engages with the locking groove (211) for a limiting fit. When the circuit breaker is opened, the traction rod (23) triggers the unlocking part (212) to drive the latch (21) to unlock and rotate. The locking part (241) first releases the limiting engagement with the locking groove (211), and then the locking part (241) slides into the locking groove (211) until the pull rod (24) moves to the opening position.

6. The operating mechanism according to claim 5, characterized in that: A locking elastic element (261) is connected between the latch (21) and the pull rod (24). When the pull rod (24) moves to the closed position, the elastic force of the locking elastic element (261) will limit the locking part (241) in the locking groove (211).

7. The operating mechanism according to claim 6, characterized in that: The locking groove (211) includes a strip area (2111) and a recessed area (2112). The recessed area (2112) is connected to the end of the strip area (2111) away from the push rod (22), so that one side wall of the locking groove (211) forms a stepped surface. The strip area (2111) and the locking part (241) slide to restrict the movement of the pull rod (24). When the pull rod (24) moves to the closed position, the locking part (241) is limited by the recessed area (2112).

8. The operating mechanism according to claim 6, characterized in that: The bracket (20) is provided with a locking mounting shaft (201), the locking buckle (21) is rotatably mounted on the locking mounting shaft (201), and the pull rod (24) is provided with a limiting groove (240) through which the locking mounting shaft (201) passes.

9. The operating mechanism according to claim 6, characterized in that: The latch (21) has a first connecting part (213) at one end near the push rod (22), and the pull rod (24) has a second connecting part (243) at one end near the push rod (22). The two ends of the locking elastic member (261) are respectively connected to the first connecting part (213) and the second connecting part (243).

10. The operating mechanism according to claim 6, characterized in that: The pull rod (24) has a linkage shaft (25) at one end away from the electromagnetic mechanism (29). The middle part of the push rod (22) is rotatably connected between a pair of brackets (20). Each end of the push rod (22) has a linkage groove. The linkage shaft (25) is linked to one linkage groove and slides with the bracket (20). The other linkage groove is used to drive the connection with the rotating shaft (311) of the moving contact assembly (31).

11. The operating mechanism according to claim 5, characterized in that: The pull rod (24) includes two spaced connecting walls, one end of which is connected to form a connecting end. The connecting end is provided with at least one mounting part (244), which is fixedly connected to the electromagnetic mechanism (29). Each connecting wall is provided with a linkage hole (242) at one end away from the mounting part (244). A linkage shaft (25) for connecting with the push rod (22) is installed in the linkage hole (242). Each connecting wall is provided with a strip-shaped limiting groove (240) and a through hole (247) in the middle. The through hole (247) is located between the limiting groove (240) and the linkage hole (242). A shaft serving as a locking part (241) is installed in the through hole (247). The edge of the connecting wall away from the mounting part (244) protrudes outward to form a connecting protrusion (245) and is provided with a limiting slot (246). A shaft serving as a second connecting part (243) is provided in the limiting slot (246).

12. The operating mechanism according to claim 5, characterized in that: The latch (21) includes two spaced-apart mating walls. One side edge of the two mating walls connects to form a U-shaped latch body (210). The latch body (210) has space for sliding engagement with the pull rod (24). One end plate of the mating wall is provided with a connecting hole (215) for the latch mounting shaft (201) mounted on the bracket (20) to pass through. The other end edge of the mating wall extends outward to form an extension (216). The extension (216) is provided with a shaft hole (217). The shaft hole (217) is fitted with a first connecting part. The shaft of (213) has an unlocking part (212) at the end of the first connecting part (213). The middle part of the mating wall is provided with a locking groove (211). The locking groove (211) includes a strip area (2111) and a recessed area (2112). The recessed area (2112) is located at one end near the connecting hole (215), and the recessed area (2112) makes the side of the locking groove (211) near the extension (216) form a stepped surface. The strip area (2111) slides with the pull rod (24), and the recessed area (2112) is used to lock the pull rod (24).

13. A circuit breaker, comprising a housing (1), wherein at least one contact system is provided within the housing (1), the contact system comprising a cooperating moving contact assembly (31) and a stationary contact (32), characterized in that: It also includes the operating mechanism as described in any one of claims 1-12.

14. The circuit breaker according to claim 13, characterized in that: The moving contact assembly (31) includes a rotating shaft (311) and a moving contact (312). The rotating shaft (311) is rotatably mounted inside the housing (1). The moving contact (312) is connected to the rotating shaft (311). A tripping spring (33) is also connected between the rotating shaft (311) and the housing (1). After the latch (21) and the pull rod (24) are released from their limiting engagement, the tripping spring (33) drives the rotating shaft (311) to trip.

15. The circuit breaker according to claim 13, characterized in that: The housing (1) is also provided with at least one accessory module, which triggers the traction rod (23) to rotate and drive the contact system to open.

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