Operating mechanism of circuit breaker and circuit breaker

Abstract

The present invention relates to the field of low-voltage electrical appliances, and particularly to an operating mechanism of a circuit breaker, which includes a tripping latch, a locking latch, a reclosing latch, and a traction rod. The tripping latch and the locking latch are latched and cooperated, the locking latch and the reclosing latch are limited and cooperated, and the reclosing latch and the traction rod are drivingly cooperated. The traction rod drives the reclosing latch to rotate to release the limited cooperation with the locking latch, and the locking latch rotates in the first direction to release the latching cooperation with the tripping latch. The operating mechanism further includes an anti-deadlock device drivingly cooperated with the traction rod. When the traction rod drives the reclosing latch to rotate to release the limited cooperation with the locking latch, the traction rod drives the anti-deadlock device to apply a first acting force F3 to the locking latch to make the locking latch rotate in the first direction. For the operating mechanism, its anti-deadlock device avoids the situation where the tripping latch and the locking latch of the operating mechanism cannot release the latching cooperation. The present invention also relates to a circuit breaker including the operating mechanism, and its operation is stable and reliable.

Description

Technical Field

[0001] The present invention relates to the field of low-voltage electrical appliances, specifically to an operating mechanism of a circuit breaker, and particularly to an operating mechanism of a circuit breaker with an anti-deadlock device; it also relates to a circuit breaker including the operating mechanism. Background Art

[0002] A molded case circuit breaker is a switching electrical appliance used in a low-voltage distribution network to protect circuits and equipment from damages caused by faults such as overload and short circuit, thereby ensuring the safety of the power grid and equipment; the molded case circuit breaker is also used for the infrequent starting, overload, and short-circuit protection of motors.

[0003] In a molded case circuit breaker, its operating mechanism, as an execution component for realizing the opening and closing functions, requires the operating mechanism to be reliable and stable, and faults such as slipping and deadlocking that cause the circuit breaker to fail are not allowed, so as to effectively protect the safety of personnel, equipment, and the power grid. For the operating mechanism of the existing molded case circuit breaker, its tripping latch and locking latch are overlapped, and the locking latch and reclosing latch are overlapped. The operating mechanism is latched through the stable overlap of three latches (i.e., the tripping latch, the locking latch, and the reclosing latch); its drawbar is connected to the reclosing latch, and by driving the drawbar, the overlap between the reclosing latch and the locking latch is released, and then the overlap between the locking latch and the tripping latch is released, thereby realizing the unlocking of the operating mechanism.

[0004] However, the operating mechanism of the existing molded case circuit breaker often has the following defects, resulting in the failure of the molded case circuit breaker: due to the manufacturing process defects of the three latches, there are burrs on the overlapping surfaces, increasing the friction force at the overlap of the three latches; especially the cooperation between the tripping latch and the locking latch cannot be released even after the cooperation between the reclosing latch and the locking latch is released, resulting in a deadlock fault of the operating mechanism, which poses a great hazard to the safety of the power grid and equipment. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide an operating mechanism of a circuit breaker, whose anti-deadlock device avoids the situation where the tripping latch and the locking latch of the operating mechanism cannot release the locking cooperation; it also provides a circuit breaker including the operating mechanism, which works stably and reliably.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] An operating mechanism of a circuit breaker includes a tripping latch 1, a locking latch 2, a reclosing latch 3, and a drawbar 5. The tripping latch 1 and the locking latch 2 are latched and cooperated, the locking latch 2 and the reclosing latch 3 are limited and cooperated, and the reclosing latch 3 and the drawbar 5 are driven and cooperated; the drawbar 5 drives the reclosing latch 3 to rotate to release its limited cooperation with the locking latch 2, and the locking latch 2 rotates in the first direction to release its latched cooperation with the tripping latch 1;

[0008] The operating mechanism further includes an anti - dead - lock device 678 that is drivingly engaged with the traction rod 5. When the traction rod 5 drives the re - buckle 3 to rotate so that it is disengaged from the limit engagement with the lock - catch 2, the traction rod 5 drives the anti - dead - lock device 678 to apply a first acting force F3 to the lock - catch 2 to make the lock - catch 2 rotate in the first direction.

[0009] Preferably, the anti - dead - lock device 678 includes a linkage 8 pivotally arranged, and two ends of the linkage 8 are respectively drivingly engaged with the traction rod 5 and the lock - catch 2.

[0010] Preferably, the traction rod 5 includes a traction - rod driving finger 50 that is drivingly engaged with the linkage 8. When the traction rod 5 rotates and drives the traction - rod driving finger 50 to swing, the traction - rod driving finger 50 drives the linkage 8 to rotate; the lock - catch 2 includes a lock - catch receiving arm 21 that is drivingly engaged with the linkage 8.

[0011] Preferably, the linkage 8 includes a linkage receiving arm 80, a linkage driving arm 81, and a linkage pivoting portion 82. The linkage receiving arm 80 and the linkage driving arm 81 are bent and connected and are respectively drivingly engaged with the traction rod 5 and the lock - catch 2. The linkage pivoting portion 82 is arranged at the connection of the linkage receiving arm 80 and the linkage driving arm 81, and the linkage 8 is pivotally arranged through the linkage pivoting portion 82.

[0012] Preferably, the anti - dead - lock device 678 further includes a device bracket 6 and a linkage return spring 7. The linkage 8 is pivotally arranged on the device bracket 6, and two ends of the linkage return spring 7 are respectively engaged with the device bracket 6 and the linkage 8 to provide a return force for the linkage 8.

[0013] Preferably, the cross - section of the device bracket 6 is an L - shaped structure, including a bracket fixing plate 60 and a bracket assembly plate 61 that are bent and connected. The linkage 8 is pivotally arranged on the bracket assembly plate 61; the linkage return spring 7 includes a torsion - spring coil body 70, a torsion - spring first arm 71, and a torsion - spring second arm 72. The torsion - spring coil body 70 is sleeved on the rotating shaft of the linkage 8, the torsion - spring first arm 71 is engaged with the linkage 8, and the torsion - spring second arm 72 is engaged with the device bracket 6.

[0014] Preferably, the lock - catch 2 includes a lock - catch main board 20, a lock - catch support leg 23, and a lock - catch receiving arm 21. A lock - catch hole 22 for engaging with the jump - catch 1 is provided in the middle of the lock - catch main board 20. The lock - catch support leg 23 and the lock - catch receiving arm 21 are respectively arranged at two ends of the lock - catch main board 20. The lock - catch 2 is pivotally arranged through the lock - catch support leg 23. The lock - catch receiving arm 21 is an L - shaped structure, with one end connected to the lock - catch main board 20 and the other end drivingly engaged with the anti - dead - lock device 678.

[0015] Preferably, the operating mechanism further includes a mechanism support, which includes two relatively arranged support side plates. An assembly space is formed between the two support side plates. The jump latch 1, the lock latch 2, and the re-latch 3 are all located within the assembly space and are respectively pivotally arranged on the mechanism support. The re-latch 3 is fixedly connected to the traction rod 5; the anti-jamming device 678 is arranged on one side of the mechanism support.

[0016] A circuit breaker includes the operating mechanism described above.

[0017] Preferably, the circuit breaker further includes a base 1a. The operating mechanism is arranged on the base 1a. The anti-jamming device 678 is located on one side of the mechanism support of the operating mechanism and is fixedly connected to the base 1a; the circuit breaker further includes a short-circuit and overload protection mechanism 9 arranged within the base 1a and drivingly cooperating with the traction rod 5.

[0018] In the operating mechanism of the circuit breaker of the present invention, for the anti-jamming device 678, when the traction rod 5 drives the re-latch 3 to rotate to release the limit cooperation with the lock latch 2, a first acting force that drives the lock latch 2 to rotate in the first direction is applied to the lock latch 2 under the drive of the traction rod 5, avoiding the situation where the jump latch 1 and the lock latch 2 cannot be disengaged by themselves, resulting in the failure of the operating mechanism, ensuring the reliable and stable operation of the operating mechanism, and ensuring the user's electrical safety.

[0019] The circuit breaker of the present invention includes the operating mechanism described above and has stable and reliable operation. Brief Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the circuit breaker of the present invention;

[0021] Figure 2 is a schematic structural diagram of the operating mechanism of the present invention, showing the latching cooperation relationship between the jump latch and the lock latch, and the limit cooperation relationship between the lock latch and the re-latch;

[0022] Figure 3 is a schematic structural diagram of the operating mechanism of the present invention, showing the cooperation relationship between the anti-jamming device and the lock latch and the traction rod respectively;

[0023] Figure 4 is a schematic structural diagram of the anti-jamming device of the present invention;

[0024] Figure 5 is a schematic structural diagram of the linkage reset spring of the present invention;

[0025] Figure 6 is a schematic structural diagram of the device support of the present invention;

[0026] Figure 7 is a schematic structural diagram of the linkage of the present invention;

[0027] Figure 8 is a schematic structural diagram of the lock latch of the present invention;

[0028] FIG9 is a schematic structural diagram of a traction rod of the present invention;

[0029] Figure 10 It is a schematic diagram of the force of the lock of the present invention. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1 -9 gives an embodiment to further illustrate the specific implementation of the operating mechanism of the circuit breaker of the present invention and the circuit breaker including the operating mechanism. The operating mechanism of the circuit breaker of the present invention and the circuit breaker are not limited to the description of the following embodiments.

[0031] like Figure 1 , 3 -10, the operating mechanism of the circuit breaker of the present invention includes a trip latch 1, a lock latch 2, a re-latch 3 and a traction rod 5, the trip latch 1 and the lock latch 2 are locked together, the lock latch 2 and the re-latch 3 are limited in position, and the re-latch 3 and the traction rod 5 are driven to cooperate; the traction rod 5 drives the re-latch 3 to rotate so that it releases the limited position cooperation with the lock latch 2, and the lock latch 2 rotates in the first direction so that it releases the lock cooperation with the trip latch 1; the operating mechanism also includes an anti-deadlock device 678 driven to cooperate with the traction rod 5, when the traction rod 5 drives the re-latch 3 to rotate so that it releases the limited position cooperation with the lock latch 2, the traction rod 5 drives the anti-deadlock device 678 to apply a first force to the lock latch 2 to rotate the lock latch 2 in the first direction.

[0032] The operating mechanism of the circuit breaker of the present invention includes an anti-deadlocking device 678, which is driven by the traction rod 5 to apply a first force to the lock buckle 2 to rotate the lock buckle 2 in a first direction when the traction rod 5 drives the re-lock 3 to rotate so as to release the limit fit with the lock buckle 2, thereby avoiding the situation in which the operating mechanism fails due to the inability of the re-lock 1 and the lock buckle 2 to disengage by themselves, thereby ensuring the reliable and stable operation of the operating mechanism and the safety of electricity use by users.

[0033] Preferably, Figure 1 , 3 As shown in FIG. 4 , the anti-deadlock device 678 includes a pivotally arranged linkage member 8, and the two ends of the linkage member 8 are respectively driven and matched with the traction rod 5 and the lock buckle 2. Further, as Figure 3 As shown, when the traction rod 5 drives the buckle 3 to rotate so that it releases the limit fit with the lock buckle 2, the traction rod 5 drives the linkage member 8 to rotate, so that the linkage member 8 applies a first force to the lock buckle 2 to rotate it in a first direction.

[0034] like Figure 1 As shown, the present invention also discloses a circuit breaker, which includes the operating mechanism.

[0035] The operating mechanism of the circuit breaker of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0036] As Figures 1-3 shown, this is an embodiment of the operating mechanism of the circuit breaker of the present invention.

[0037] As Figures 1-3 shown, the operating mechanism of the present invention includes a tripping latch 1, a locking latch 2, a reclosing latch 3, and a traction rod 5. The tripping latch 1 and the locking latch 2 are in locking cooperation, the locking latch 2 and the reclosing latch 3 are in limiting cooperation, and the reclosing latch 3 and the traction rod 5 are in driving cooperation; the traction rod 5 drives the reclosing latch 3 to rotate to release the limiting cooperation with the locking latch 2, and the locking latch 2 rotates in the first direction to release the locking cooperation with the tripping latch 1. Further, the reclosing latch 3 and the traction rod 5 are fixedly connected. Specifically, as Figure 9b shown, the reclosing latch 3 is fixedly connected to the traction rod 5 by a reclosing fixing screw 3-5; the reclosing latch 3 includes a pair of reclosing connecting arms, and the reclosing fixing screw 3-5 fixes the reclosing connecting arms on the traction rod 5; the reclosing latch 3 further includes a reclosing limiting arm, the reclosing limiting arm is in limiting cooperation with the locking latch 2, and the reclosing limiting arm and the reclosing connecting arm are respectively located at both ends of the reclosing latch 3.

[0038] Preferably, as Figures 1-3 shown, the operating mechanism of the present invention further includes a mechanism bracket. The mechanism bracket includes two relatively spaced-apart bracket side plates, and an assembly space is formed between the two bracket side plates. The tripping latch 1, the locking latch 2, and the reclosing latch 3 are all arranged in the assembly space and are respectively pivotally arranged on the mechanism bracket.

[0039] It should be noted that the operating mechanism of the present invention further includes a rocker arm assembly pivotally arranged on the mechanism bracket, a first crank with one end pivotally arranged on the tripping latch 1, a main pull spring with both ends respectively connected to the rocker arm assembly and the first crank, and a first link with both ends respectively connected to the first crank and the moving contact mechanism of the circuit breaker; the above structures of the operating mechanism of the present invention can all be realized by the prior art and will not be elaborated in detail here.

[0040] As Figure 10 shown, in the operating mechanism of the prior art, due to the production and manufacturing process, there are often burrs or uneven surfaces at the lapping surface of the tripping latch 1 and the locking latch 2, resulting in an increase in the friction force at the lapping part of the tripping latch 1 and the locking latch 2. Therefore, after the reclosing latch 3 and the locking latch 2 are released from the limiting cooperation, the tripping latch 1 and the locking latch 2 often cannot be released from the locking cooperation due to the excessive friction force between them, and the operating mechanism has a deadlock failure.

[0041] To solve the problems of the prior art, the present invention improves the operating mechanism. Specifically:

[0042] As Figure 1 、 3As shown in FIGS. 3 and 4, the operating mechanism of the present invention further includes an anti-jamming device 678. When the traction rod 5 drives the re-latch 3 to rotate to release the limit cooperation with the latch 2, the traction rod 5 drives the anti-jamming device 678 to apply a first acting force F3 to the latch 2 to make the latch 2 rotate in the first direction, improving the reliability of unlocking the latch 2 and the toggle 1, and accelerating the unlocking of the latch 2 and the toggle 1.

[0043] As Figure 10 shown, for the operating mechanism of the prior art, after the latch 2 and the re-latch 3 are released from the limit cooperation, the latch 2 will only be subjected to the acting force F1 and the frictional force F2 of the toggle 1. Only when the overturning moment M1 formed by the acting force F1 on the latch 2 is greater than the frictional moment M2 formed by the frictional force F2 on the latch 2, can the latch 2 and the toggle 1 be normally disengaged. It often causes the overturning moment M1 and the frictional moment M2 to form a balance due to burrs or uneven surfaces at the overlapping surface of the latch 2 and the toggle 1, making the latch 2 and the toggle 1 unable to be normally disengaged. For the operating mechanism of the present invention, the anti-jamming device 678 applies a first acting force F3 to make the latch 2 rotate in the first direction. The sum of the overturning moment M3 formed by the first acting force F3 on the latch 2 and the overturning moment M1 must be greater than the frictional moment M2, enabling the latch 2 and the toggle 1 to be normally disengaged.

[0044] Preferably, as Figure 1 、 3 shown in FIGS. 3 and 4, the anti-jamming device 678 includes a pivotally arranged linkage 8, and both ends of the linkage 8 are respectively in driving cooperation with the traction rod 5 and the latch 2. Further, as Figure 4 and 7 shown, the linkage 8 includes a linkage driven arm 80, a linkage driving arm 81, and a linkage pivoting portion 82. The linkage driven arm 80 and the linkage driving arm 81 are bent and connected and are respectively in driving cooperation with the traction rod 5 and the latch 2. The linkage pivoting portion 82 is arranged at the connection of the linkage driven arm 80 and the linkage driving arm 81, and the linkage 8 is pivotally arranged through the linkage pivoting portion 82.

[0045] Preferably, as Figure 8 shown, the latch 2 includes a latch driven arm 21 that is in driving cooperation with the linkage 8. Further, as Figure 3 shown, the latch driven arm 21 is in driving cooperation with the linkage driving arm 81.

[0046] Preferably, as Figure 9a and 9b shown, the traction rod 5 includes a traction rod driving finger 50 that is in driving cooperation with the linkage 8. The traction rod 5 rotates to drive the traction rod driving finger 50 to swing, and the traction rod driving finger 50 drives the linkage 8 to rotate. Further, as Figure 3 shown, the traction rod driving finger 50 is in driving cooperation with the linkage driven arm 80. Further, as Figure 9a and9b The traction rod 5 shown is a bar-shaped column structure. One end of the traction rod driving finger 50 is connected to the traction rod 5, and the other end protrudes toward one side of the traction rod 5. The traction rod driving finger 50 is perpendicular to the axial direction of the traction rod 5.

[0047] Specifically, as Figure 2 and 3 shown in the direction, the traction rod 5 rotates counterclockwise and drives the re-latch 3 to rotate so that its limit fit with the latch 2 is released. At the same time, the traction rod driving finger 50 of the traction rod 5 is driven by the linkage member to rotate clockwise by the driving arm 80 of the linkage member 8, so that the driving arm 81 of the linkage member applies a first acting force F3 that causes it to rotate clockwise (the first direction) to the latch 2 through the latch receiving arm 21.

[0048] As Figure 3 and 4 shown, it is an embodiment of the anti-jamming device 678.

[0049] As Figure 3 and 4 shown, the anti-jamming device 678 includes a device bracket 6, a linkage member return spring 7, and a linkage member 8. The linkage member 8 is pivotally arranged on the device bracket 6. The two ends of the linkage member return spring 7 are respectively engaged with the device bracket 6 and the linkage member 8 to provide a return force for the linkage member 8. Further, as Figure 4 shown, the linkage member 8 is pivotally arranged on the device bracket 6 through a linkage member shaft 8-6.

[0050] It should be noted that the linkage member 8 is not limited to being assembled on the bracket 6. The linkage member 8 can also be pivotally arranged on other structures, such as the mechanism bracket of the operating mechanism, the housing of the circuit breaker, etc.

[0051] Preferably, as Figure 4 shown, the linkage member shaft 8-6 is a rivet or a screw or a rod-shaped shaft. One end of the linkage member shaft 8-6 is connected to the device bracket 6, and the other end is provided with an axle head that is in limit fit with the linkage member 8, so that the linkage member 8 is limited between the axle head and the device bracket 6.

[0052] Preferably, as Figure 6 shown, the cross-section of the device bracket 6 is an L-shaped structure, including a bracket fixing plate 60 and a bracket assembly plate 61 that are bent and connected. The linkage member 8 is pivotally arranged on the bracket assembly plate 61. Further, as Figure 6 shown, the bracket assembly plate 61 is provided with a shaft hole 611 that cooperates with the linkage member shaft 8-6 and a jack hole 610 that cooperates with the torsion spring second arm 72 of the linkage member return spring 7; the bracket fixing plate 60 is provided with an assembly hole 600 for fixing the device bracket 6.

[0053] Preferably, as Figure 5 ​As shown, the linkage reset spring 7 is a single torsion spring, including a torsion spring coil body 70, a first torsion spring arm 71, and a second torsion spring arm 72. The torsion spring coil body 70 is sleeved on the rotating shaft of the linkage 8. The first torsion spring arm 71 cooperates with the linkage 8, and the second torsion spring arm 72 cooperates with the bracket 6.

[0054] It should be noted that the linkage reset spring 7 is not limited to a torsion spring, and can also be a tension spring, as long as it can provide a reset force for the linkage 8. In the present invention, the linkage reset spring 7 is preferably a torsion spring, which is beneficial to reducing the assembly space required for the anti-jamming device 678.

[0055] As Figure 8 shown, it is an embodiment of the latch 2.

[0056] As Figure 8 shown, the latch 2 includes a latch main board 20, latch support feet 23, and a latch driven arm 21. A latch hole 22 for cooperating with the jump latch 1 is provided in the middle of the latch main board 20. The latch support feet 23 and the latch driven arm 21 are respectively arranged at both ends of the latch main board 20. The latch 2 is pivotally arranged through the latch support feet 23. The latch driven arm 21 is an L-shaped structure, with one end connected to the latch main board 20 and the other end drivingly cooperating with the anti-jamming device 679. Further, as Figure 8 shown, the latch support feet 23 and the latch driven arm 21 are bent towards both sides of the latch main board 20 respectively.

[0057] Preferably, as Figure 8 shown, the two latch support feet 23 are respectively arranged at both lower ends of the latch main board 20.

[0058] Preferably, as Figure 8 shown, the latch driven arm 21 includes a first driven arm part and a second driven arm part that are bent and connected. Both ends of the first driven arm part are obtusely bent and connected to the latch main board 20 and the second driven arm part respectively, so that the latch main board 20 and the second driven arm part are respectively located on both sides of the first driven arm part. Further, as Figure 3 shown, the side surface of the second driven arm part is oppositely arranged to the linkage driving arm 81 of the linkage 8.

[0059] As Figure 1 shown, the present invention also discloses a circuit breaker, including the operating mechanism.

[0060] As Figure 1 shown, the circuit breaker further includes a base 1a. The operating mechanism and the anti-jamming device 678 are respectively arranged on the base 1a, and the anti-jamming device 678 is arranged on one side of the mechanism bracket. Further, as Figure 1As shown in the figure, the circuit breaker of the present invention further includes a short - circuit and overload protection mechanism 9. When a short - circuit or overload fault occurs in the circuit breaker, the short - circuit and overload protection mechanism 9 drives the traction rod 5 to rotate. The traction rod 5 drives the reclosing catch 3 to rotate, so that the reclosing catch 3 is disengaged from the limit cooperation with the locking catch 2. The locking catch 2 rotates to disengage the locking cooperation with the tripping catch 1. At the same time, the traction rod 5 drives the anti - dead - catch device 678 to apply a force to the locking catch 2 to accelerate the rotation of the locking catch 2 and disengage the locking cooperation with the tripping catch 1.

[0061] Preferably, the short - circuit and overload protection mechanism 9 includes a short - circuit protection mechanism and an overload protection mechanism that are respectively in driving cooperation with the traction rod 5. The short - circuit protection mechanism is an electromagnetic release mechanism, and the overload protection mechanism is a thermal release mechanism. Further, as Figure 9c shown, the traction rod 5 includes a traction - rod driven side wall 52 that is respectively in cooperation with the short - circuit protection mechanism and the overload protection mechanism. Specifically, as Figure 9c shown, the traction rod 5 includes three traction - rod driven side walls 52 arranged side by side at intervals. The circuit breaker includes 3 breaking poles, and each breaking pole includes a short - circuit and overload protection mechanism 9. The 3 short - circuit and overload protection mechanisms 9 are respectively in driving cooperation with the three traction - rod driven side walls 52.

[0062] Preferably, as Figure 1 shown, the circuit breaker of the present invention further includes a plurality of breaking poles. Each breaking pole includes a moving contact and a static contact that are used in cooperation. The operating mechanism straddles one breaking pole and is drivingly connected to the moving contacts of each breaking pole. The traction rod 5 straddles the phase spacers of multiple circuit breakers. The short - circuit and overload protection mechanisms 9 corresponding to the multiple breaking poles can all drive the traction rod 5 to rotate. When a short - circuit or overload fault occurs in any one of the breaking poles, it drives the traction rod 5 to rotate. The traction rod 5 drives the reclosing catch 3 to rotate, so that the reclosing catch 3 is disengaged from the limit cooperation with the locking catch 2. The locking catch 2 rotates to disengage the locking cooperation with the tripping catch 1. At the same time, the traction rod 5 drives the anti - dead - catch device 678 to apply a force to the locking catch 2 to accelerate the rotation of the locking catch 2 and disengage the locking cooperation with the tripping catch 1.

[0063] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. 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 belongs, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should all be regarded as belonging to the protection scope of the present invention.

Claims

1. An operating mechanism for a circuit breaker, which includes a tripping latch (1), a locking latch (2), a reclosing latch (3) and a traction rod (5). The tripping latch (1) and the locking latch (2) are in a locking fit, the locking latch (2) and the reclosing latch (3) are in a limiting fit, and the reclosing latch (3) and the traction rod (5) are in a driving fit. The traction rod (5) drives the reclosing latch (3) to rotate to release the limiting fit with the locking latch (2), and the locking latch (2) rotates in the first direction to release the locking fit with the tripping latch (1). It is characterized in that: The operating mechanism further includes an anti-jamming device (678) that is in a driving fit with the traction rod (5). When the traction rod (5) drives the reclosing latch (3) to rotate to release the limiting fit with the locking latch (2), the traction rod (5) drives the anti-jamming device (678) to apply a first acting force (F3) to the locking latch (2) to make the locking latch (2) rotate in the first direction. The anti-jamming device (678) includes a linkage member (8) pivotally arranged. The two ends of the linkage member (8) are respectively in a driving fit with the traction rod (5) and the locking latch (2). The traction rod (5) includes a traction rod driving finger (50) that is in a driving fit with the linkage member (8). The traction rod (5) rotates and drives the traction rod driving finger (50) to swing, and the traction rod driving finger (50) drives the linkage member (8) to rotate. The locking latch (2) includes a locking latch receiving arm (21) that is in a driving fit with the linkage member (8).

2. The operating mechanism of the circuit breaker according to claim 1, characterized in that: The linkage member (8) includes a linkage member receiving arm (80), a linkage member driving arm (81) and a linkage member pivoting portion (82). The linkage member receiving arm (80) and the linkage member driving arm (81) are bent and connected and are respectively in a driving fit with the traction rod (5) and the locking latch (2). The linkage member pivoting portion (82) is arranged at the connection of the linkage member receiving arm (80) and the linkage member driving arm (81). The linkage member (8) is pivotally arranged through the linkage member pivoting portion (82).

3. The operating mechanism of the circuit breaker according to claim 1, characterized in that: The anti-jamming device (678) further includes a device bracket (6) and a linkage member return spring (7). The linkage member (8) is pivotally arranged on the device bracket (6). The two ends of the linkage member return spring (7) are respectively in cooperation with the device bracket (6) and the linkage member (8) to provide a return force for the linkage member (8).

4. The operating mechanism of the circuit breaker according to claim 3, characterized in that: The cross-section of the device bracket (6) is an L-shaped structure, including a bracket fixing plate (60) and a bracket assembly plate (61) that are bent and connected. The linkage member (8) is pivotally arranged on the bracket assembly plate (61). The linkage member return spring (7) includes a torsion spring coil body (70), a torsion spring first arm (71) and a torsion spring second arm (72). The torsion spring coil body (70) is sleeved on the rotating shaft of the linkage member (8). The torsion spring first arm (71) is in cooperation with the linkage member (8), and the torsion spring second arm (72) is in cooperation with the device bracket (6).

5. The operating mechanism of the circuit breaker according to claim 1, characterized in that: The buckle (2) includes a buckle main board (20), buckle support feet (23) and a buckle driven arm (21). A buckle hole (22) for cooperating with the jumping buckle (1) is provided in the middle of the buckle main board (20). The buckle support feet (23) and the buckle driven arm (21) are respectively arranged at both ends of the buckle main board (20). The buckle (2) is pivotally arranged through the buckle support feet (23). The buckle driven arm (21) is of an L-shaped structure, with one end connected to the buckle main board (20) and the other end drivingly cooperating with the anti-jamming device (678).

6. The operating mechanism of the circuit breaker according to claim 1, characterized in that: The operating mechanism further includes a mechanism bracket. The mechanism bracket includes two relatively arranged bracket side plates. An assembly space is formed between the two bracket side plates. The jumping buckle (1), the buckle (2) and the re-buckle (3) are all arranged in the assembly space and are respectively pivotally arranged on the mechanism bracket. The re-buckle (3) is fixedly connected to the traction rod (5); the anti-jamming device (678) is arranged on one side of the mechanism bracket.

7. A circuit breaker, characterized in that, It includes the operating mechanism according to any one of claims 1-6.

8. The circuit breaker according to claim 7, wherein: The circuit breaker further includes a base (1a). The operating mechanism is arranged on the base (1a). The anti-jamming device (678) is located on one side of the mechanism bracket of the operating mechanism and is fixedly connected to the base (1a); the circuit breaker further includes a short-circuit and overload protection mechanism (9) arranged in the base (1a) and drivingly cooperating with the traction rod (5).

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