Circuit breaker mechanism

Abstract

The utility model relates to a circuit breaker mechanism, which comprises a tripping mechanism, and the tripping mechanism comprises an energy storage cam, a tripping coil and a push rod mechanism. The trip coil adopts a passive coil; the push rod mechanism comprises a push rod, and in a static state, the push rod is located at a low position; the passive coil comprises a movable iron core, a pressure spring, a magnet and a coil; when the coil receives an external signal, the magnet releases the movable iron core, so that the push rod drives the first opening tripping plate to rotate, and the circuit breaker mechanism is driven to perform opening; when the circuit breaker mechanism stores energy, the energy storage shaft drives the energy storage cam to rotate to compress the movable iron core and the pressure spring of the passive coil until the movable iron core is attracted by the magnet. The tripping coil can be driven through the independently configured small-capacity direct-current power supply, the tripping mechanism is driven to work, and the tripping mechanism does not need to depend on a large-capacity distribution line.

Description

Technical Field

[0001] The utility model relates to the field of power transmission and distribution equipment, in particular to a circuit breaker mechanism. Background Art

[0002] The circuit breaker mechanism controls the power on and off of high-voltage electrical equipment by controlling the internal large arm to move between the open and closed positions.

[0003] The tripping mechanism is a mechanism in the circuit breaker mechanism, which is used to achieve the opening of the circuit breaker. The existing tripping mechanisms all use electromagnets as tripping coils as driving units to control the operation of the tripping mechanism. The power used by the electromagnets is relatively large, and ordinary electromagnets consume a lot of power. The common electromagnet capacity is about 300VA (generally DC220V electromagnets, the resistance is 160Ω), and generally use 220V AC. This power supply method needs to rely on the public AC operating power supply of the transformer in the distribution line or the power plant and substation. Once the power in the distribution line cannot be supplied, it will affect the normal operation of the tripping mechanism, causing the circuit breaker to fail to open and close normally.

[0004] Secondly, the opening mechanism and closing mechanism in the current circuit breaker mechanism are also complex, and the number of parts used for transmission is large, resulting in high manufacturing costs and more complicated assembly of the circuit breaker mechanism. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art, provide a circuit breaker mechanism, and solve the technical problem that the tripping mechanism of the current circuit breaker mechanism needs to be equipped with a large-capacity power supply to supply the tripping coil.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A circuit breaker mechanism is provided, comprising a tripping mechanism, the tripping mechanism comprising

[0008] Energy storage cam, trip coil and push rod mechanism;

[0009] The tripping coil adopts a passive coil;

[0010] The energy storage cam is installed on the energy storage shaft of the circuit breaker mechanism, and the passive coil and the push rod mechanism are both installed on the circuit breaker; the push rod mechanism is located between the passive coil and the first opening trip plate, and the first opening trip plate is connected to the opening half shaft;

[0011] The push rod mechanism includes a push rod that can be elastically moved up and down, and when static, the push rod is in a low position;

[0012] The passive coil includes a moving iron core, a compression spring, a magnet and a coil; when the coil receives an external signal, the magnet releases the moving iron core, and the moving iron core pushes the push rod from a low position to a high position under the energy release of the compression spring, so that the push rod drives the first opening trip plate to rotate, and drives the circuit breaker mechanism to open the circuit breaker;

[0013] When the circuit breaker mechanism is storing energy, the energy storage shaft drives the energy storage cam to rotate and compress the moving iron core and the compression spring of the passive coil until the moving iron core is attracted by the magnet, and the compression spring is compressed to maintain energy.

[0014] Furthermore, the push rod mechanism includes a push rod, a mounting frame and a reset spring. The mounting frame is fixedly arranged on the side plate of the circuit breaker, the push rod is slidably arranged on the supporting mounting frame, and the reset spring is sleeved on the push rod, one end of which abuts the mounting frame, and the other end abuts the push rod; the lower end of the push rod is suitable for cooperating with the moving iron core, and the upper end of the push rod is suitable for cooperating with the first opening trip plate.

[0015] Furthermore, the push rod is a "Z"-shaped structure.

[0016] Furthermore, the circuit breaker mechanism is provided with a closing mechanism for driving the large crank arm to rotate for closing; the closing mechanism comprises a closing coil, a closing half shaft, a closing lever, a closing cam, a closing large shaft crank arm, a closing connecting rod and a large crank arm;

[0017] The closing coil is fixedly arranged on the circuit breaker housing, the closing lever and the closing half shaft are rotatably arranged on the circuit breaker housing, the closing cam is installed on the energy storage shaft, the closing shaft crank arm is arranged on the output main shaft, and the two ends of the closing connecting rod are respectively connected to the crank arm and the closing shaft crank arm;

[0018] When the circuit breaker mechanism stores energy, the energy storage shaft drives the closing cam to abut against the closing lever, and the closing lever abuts against the closing half shaft, and the energy storage is completed;

[0019] When the circuit breaker mechanism is closed, the closing coil drives the closing half-shaft to rotate, the closing lever releases the restriction on the closing cam, the closing cam drives the closing shaft crank arm to rotate, and the closing shaft crank arm drives the crank arm to rotate through the closing connecting rod.

[0020] Furthermore, the circuit breaker mechanism is provided with a switch-off mechanism for driving the large crank arm to perform switch-off rotation;

[0021] The opening mechanism comprises an opening coil, an opening half shaft, an opening lever, an opening latch, an opening shaft crank arm, an opening connecting rod and a crank arm;

[0022] The opening coil is fixedly arranged on the circuit breaker housing, the opening lever is installed on the energy storage shaft, the opening latch is arranged on the opening lever, the opening shaft crank arm is arranged on the output main shaft, and the two ends of the opening connecting rod are respectively connected to the opening shaft crank arm and the closing shaft crank arm;

[0023] When the circuit breaker mechanism is opened, the opening coil drives the opening half-shaft to rotate. After the opening lever is released, the opening lever drives the opening latch to rotate, thereby causing the opening latch to release from the opening shaft crank arm. The crank arm then rotates to open under the action of the opening spring.

[0024] The beneficial effects of the utility model are:

[0025] In the circuit breaker mechanism of the utility model, the tripping mechanism adopts a passive coil with low starting power. The tripping coil can be driven by a separately configured small-capacity DC power supply to drive the tripping mechanism to work, so that the tripping mechanism does not need to rely on a large-capacity distribution line.

[0026] Secondly, the energy storage cam of the tripping mechanism is installed on the energy storage shaft, so that the circuit breaker mechanism can directly trigger the compression of the moving iron core in the passive coil through an energy storage roller to maintain energy during the energy storage link. The passive coil can trigger the moving iron core by passing a small capacity current. The moving iron core can directly trigger the first opening tripping plate through a push rod to realize the opening tripping of the circuit breaker mechanism.

[0027] The closing mechanism and opening mechanism in the circuit breaker mechanism are optimized so that the closing mechanism and opening mechanism can stably drive the large crank arm to swing between closing and opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The utility model is further described below in conjunction with the accompanying drawings.

[0029] Figure 1 It is a schematic diagram of the moving iron core of the energy storage cam in the tripping mechanism of the circuit breaker mechanism of the utility model beginning to abut against the passive coil;

[0030] Figure 2 It is a schematic diagram of the critical position when the energy storage cam in the tripping mechanism of the circuit breaker mechanism of the utility model begins to abut against the moving iron core of the passive coil;

[0031] Figure 3 It is a schematic diagram of the energy storage cam in the tripping mechanism of the circuit breaker mechanism of the utility model having completed energy storage;

[0032] Figure 4 It is a schematic diagram of a passive coil;

[0033] Figure 5 This is a diagram of the circuit breaker mechanism of the utility model in a state where energy storage is completed and the circuit breaker is ready to close;

[0034] Figure 6 This is a state diagram of the circuit breaker mechanism of the utility model being in a closed state and ready to be opened;

[0035] in,

[0036] 1. Energy storage shaft, 11. Energy storage cam;

[0037] 2. tripping coil, 21. moving iron core, 22. compression spring, 23. magnet, 24. coil, 25. stationary iron core;

[0038] 31. mounting frame, 32. push rod, 33. reset spring, 34. first opening trip plate;

[0039] 41. Output spindle, 42. Large crank arm, 43. Opening spring;

[0040] 51. Closing coil, 52. Closing half shaft, 53. Closing lever, 54. Closing cam, 55. Closing shaft arm, 56. Closing connecting rod;

[0041] 61. Opening coil, 62. Opening half shaft, 63. Opening lever, 64. Opening latch, 65. Opening main shaft arm, 66. Opening connecting rod, 67. Second opening release plate. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] The present application provides a circuit breaker mechanism, which is described in detail below. It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0044] In order to solve the technical problem that the tripping mechanism of the circuit breaker mechanism in the prior art needs to be equipped with a large-capacity power supply to supply the tripping coil 2, an embodiment of the present application provides a circuit breaker mechanism, which is described in detail below.

[0045] like Figures 1 to 6 As shown, a circuit breaker mechanism includes a tripping mechanism, wherein the tripping mechanism includes an energy storage cam 11, a tripping coil 2 and a push rod 32 mechanism;

[0046] The trip coil 2 is a passive coil;

[0047] The energy storage cam 11 is installed on the energy storage shaft 1 of the circuit breaker mechanism, and the passive coil and the push rod 32 mechanism are both installed on the circuit breaker; the push rod 32 mechanism is located between the passive coil and the first opening trip plate 34;

[0048] The first opening trip plate 34 is connected to the opening half shaft 62;

[0049] The push rod mechanism includes a push rod 32 that can be elastically moved up and down. When static, the push rod 32 is in a low position.

[0050] like Figure 4 As shown, the passive coil includes a bracket, a static iron core 25, a moving iron core 21, a compression spring 22, a magnet 23 and a coil 24; the static iron core 25, the magnet 23 and the coil 24 are all fixed on the bracket, the moving iron core 21 passes through the magnet 23, the moving iron core 21 is located in front of the static iron core 25 for sliding, the compression spring 22 abuts the bracket and the moving iron core 21, the static iron core 25 and the moving iron core 21 are both located in the coil 24, and the magnet 23 adopts a strong magnet.

[0051] When the coil 24 is not energized, the moving iron core 21 is magnetized by the magnet 23, and the moving iron core 21 is pressed down to make it close to the static iron core 25, and the compression spring 22 is compressed. When the moving iron core 21 passes through the critical position of the magnetic attraction of the static iron core 25, the static iron core 25 adsorbs the moving iron core 21; when the coil 24 receives an electrical signal, the magnetic field is disturbed, and the magnet 23 releases the moving iron core 21. The moving iron core 21 pushes the push rod 32 from a low position to a high position under the energy release of the compression spring 22, so that the push rod 32 drives the first opening trip plate 34 to rotate, and drives the circuit breaker mechanism to open the circuit breaker;

[0052] When the circuit breaker mechanism is storing energy, the energy storage shaft 1 drives the energy storage cam 11 to rotate and compress the moving iron core 21 and the compression spring 22 of the passive coil until the moving iron core 21 is attracted by the magnet 23, and the compression spring 22 is compressed to maintain energy.

[0053] The operating parameters of the passive coil are: working power supply: DC3V, resistance 1.1Ω, rated power 8W.

[0054] Specifically, as an optional implementation in this embodiment, Figures 1 to 3 As shown, the push rod mechanism includes a push rod 32, a mounting frame 31 and a reset spring 33. The mounting frame 31 is fixedly arranged on the side plate of the circuit breaker, and the push rod 32 is slidably arranged on the mounting frame 31. The reset spring 33 is sleeved on the push rod 32, one end of which abuts the mounting frame 31, and the other end of which abuts the push rod 32; the lower end of the push rod 32 is suitable for cooperating with the moving iron core 21, and the upper end of the push rod 32 is suitable for cooperating with the first opening trip plate 34.

[0055] As a preferred embodiment of the present invention, the push rod 32 is a “Z”-shaped structure, that is, it includes two vertical rods and a horizontal rod, the vertical rod at the upper end is connected to the first opening trip plate 34 , and the vertical rod at the lower end is connected to the moving iron core 21 .

[0056] Working process of the tripping mechanism:

[0057] The energy storage shaft 1 drives the energy storage cam 11 to rotate clockwise, and the energy storage cam 11 begins to press down the moving iron core 21 of the passive coil, and the moving iron core 21 slowly moves downward. Figure 1 As shown in FIG. 1 , when the energy storage cam 11 rotates and presses down the moving iron core 21 to break through the critical position where the moving iron core 21 is attracted by the magnet 23, as shown in FIG. Figure 2 As shown, the moving iron core 21 compresses the compression spring 22, and the passive coil stores energy. After the energy storage shaft 1 completes the energy storage, it drives the energy storage cam 11 to rotate to the energy storage position. The position of the energy storage cam 11 is shown in FIG. Figure 3 As shown, at this time, the push rod 32 is in a low position under the action of the return spring 33.

[0058] When the tripping mechanism is needed to open the circuit breaker mechanism, a low-energy current is provided to the passive coil through the control unit. After the coil 24 is energized, the magnetic field can be interfered with, so that the magnet 23 loosens the moving iron core 21. The moving iron core 21 extends under the elastic force of the compression spring 22. The moving iron core 21 drives the push rod 32 from a low position to a high position. The push rod 32 pushes the first opening trip plate 34 and the opening half shaft 62 to rotate, so that the circuit breaker mechanism is opened. The entire opening process of the circuit breaker only requires providing a small current to the coil 24.

[0059] Specifically, as an optional implementation in this embodiment, Figure 5 As shown, the circuit breaker mechanism is provided with a closing mechanism for driving the large crank arm 42 to perform closing rotation; the closing mechanism comprises a closing coil 51, a closing half shaft 52, a closing lever 53, a closing cam 54, a closing large shaft crank arm 55, a closing connecting rod 56 and the large crank arm 42;

[0060] The closing coil 51 is fixedly arranged on the circuit breaker housing, the closing lever 53 and the closing half shaft 52 are rotatably arranged on the circuit breaker housing, the closing cam 54 is installed on the energy storage shaft 1, the closing shaft crank arm 55 is arranged on the output main shaft 41, and the two ends of the closing connecting rod 56 are respectively connected to the crank arm 42 and the closing shaft crank arm 55;

[0061] The closing half shaft 52 is provided with a closing trip plate, and the closing trip plate rotates with the closing half shaft 52 .

[0062] A roller is disposed on the closing cam 54 , and the closing cam 54 abuts against the closing lever 53 via the roller.

[0063] A roller is provided on the closing shaft crank arm 55 , and the closing shaft crank arm 55 moves in contact with the closing cam 54 through the roller.

[0064] When the circuit breaker mechanism stores energy, the energy storage shaft 1 drives the closing cam 54 to abut against the closing lever 53, and the closing lever 53 abuts against the closing half shaft 52, and the energy storage is completed.

[0065] like Figure 5 As shown, when the circuit breaker mechanism is closed, the closing coil 51 drives the closing trip plate to rotate counterclockwise, thereby driving the closing half shaft 52 to rotate counterclockwise, the closing lever 53 is released from the closing half shaft 52, the closing lever 53 starts to rotate counterclockwise, and then the closing lever 53 releases the restriction on the closing cam 54, the closing cam 54 rotates counterclockwise under the drive of the energy storage shaft 1, the closing cam 54 drives the closing shaft crank arm 55 to rotate clockwise, and the closing shaft crank arm 55 drives the crank arm 42 to rotate for closing via the closing connecting rod 56.

[0066] like Figure 5 As shown, a trip spring 43 is arranged between the lower end of the large crank arm 42 and the bottom of the mechanism. When the large crank arm 42 is closed, it rotates clockwise, the trip spring 43 is compressed, the right end of the large crank arm 42 descends, and the left end of the large crank arm 42 rises, so that the circuit breaker mechanism is closed.

[0067] The closing coil 51 is a common electromagnet coil, which is the common coil introduced in the background technology and needs to be equipped with a high-power power supply when used.

[0068] Specifically, as an optional implementation in this embodiment, Figure 5 As shown, the circuit breaker mechanism is provided with a switch-off mechanism for driving the large crank arm 42 to perform switch-off rotation;

[0069] like Figure 6 As shown, the opening mechanism includes an opening coil 61, an opening half shaft 62, an opening lever 63, an opening latch 64, an opening large shaft crank arm 65, an opening connecting rod 66 and a large crank arm 42;

[0070] The opening coil 61 is fixedly arranged on the circuit breaker housing, the opening lever 63 is installed on the energy storage shaft 1, the opening latch 64 is arranged on the opening lever 63, the opening shaft crank arm 65 is arranged on the output main shaft 41, and the two ends of the opening connecting rod 66 are respectively connected to the crank arm 42 and the opening shaft crank arm 65;

[0071] The opening latch 64 is rotatably arranged on the opening lever 63, and a torsion spring is arranged between the opening lever 63 and the opening latch 64. The installation position of the opening latch 64 on the opening lever 63 is selected by those skilled in the art according to actual conditions.

[0072] The second opening trip plate 57 is disposed on the opening half shaft 62 , and the second opening trip plate 57 rotates synchronously with the opening half shaft 62 .

[0073] A roller is arranged on the opening switch shaft arm 65 , and the roller is used for abutting and cooperating with the opening switch latch 64 .

[0074] like Figure 6 As shown, when the circuit breaker mechanism is opened, the opening coil 61 is energized to drive the second opening trip plate 57, and the second opening trip plate 57 and the opening half shaft 62 rotate clockwise. After the opening lever 63 is tripped, the opening lever 63 rotates clockwise under the action of the energy storage shaft 1, and the opening lever 63 drives the opening latch 64 to rotate, so that the opening latch 64 is tripped from the opening shaft crank arm 65. At this time, the opening shaft crank arm 65 is no longer suppressed, and the opening spring 43 starts to lift the left end of the crank arm 42, that is, lifts the opening connecting rod 66, and drives the opening shaft crank arm 65 to rotate clockwise, and the right end of the crank arm 42 drops, driving the circuit breaker mechanism to open.

[0075] The opening coil 61 is a common electromagnet coil, which is the common coil introduced in the background technology and needs to be equipped with a high-power power supply when used.

[0076] In this embodiment, the closing link 56 and the opening link 66 can be the same link, that is, the upper end of the link is connected to the closing shaft crank arm 55 and the opening shaft crank arm 65 through a pin.

[0077] Secondly, in this embodiment, the closing shaft crank arm 55 and the opening shaft crank arm 65 can also be made into one crank arm, and rollers cooperating with the closing lever 53 and the opening latch 64 can be respectively provided on the crank arm.

[0078] The various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to technical personnel in this field, and their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods.

[0079] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0080] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0081] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0082] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0083] In addition, each functional unit in each embodiment of the present utility model may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0084] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A circuit breaker mechanism, comprising a tripping mechanism, characterized in that: The tripping mechanism comprises An energy storage cam (11), a tripping coil (2) and a push rod mechanism; The trip coil (2) is a passive coil; The energy storage cam (11) is mounted on the energy storage shaft (1) of the circuit breaker mechanism, and the passive coil and the push rod mechanism are both mounted on the circuit breaker; the push rod mechanism is located between the passive coil and the first opening trip plate (34), and the first opening trip plate (34) is connected to the opening half shaft (62); The push rod mechanism comprises a push rod (32) which can be elastically moved up and down. When in a static state, the push rod (32) is in a low position. The passive coil comprises a moving iron core (21), a compression spring (22), a magnet (23) and a coil (24); when the coil (24) receives an external signal, the magnet (23) releases the moving iron core (21), and the moving iron core (21) pushes the push rod (32) from a low position to a high position under the action of the energy release of the compression spring (22), so that the push rod (32) drives the first opening trip plate (34) to rotate, thereby driving the circuit breaker mechanism to open the circuit; When the circuit breaker mechanism is storing energy, the energy storage shaft (1) drives the energy storage cam (11) to rotate and compress the moving iron core (21) and the compression spring (22) of the passive coil until the moving iron core (21) is attracted by the magnet (23), and at the same time the compression spring (22) is compressed to maintain energy.

2. The circuit breaker mechanism according to claim 1, characterized in that: The push rod mechanism comprises a push rod (32), a mounting frame (31) and a reset spring; the mounting frame (31) is fixedly arranged on the side plate of the circuit breaker; the push rod (32) is slidably arranged on the mounting frame (31); the reset spring is sleeved on the push rod (32), one end of which abuts against the mounting frame (31) and the other end of which abuts against the push rod (32); the lower end of the push rod (32) is suitable for cooperating with the moving iron core (21), and the upper end of the push rod (32) is suitable for cooperating with the first opening trip plate (34).

3. The circuit breaker mechanism according to claim 2, characterized in that: The push rod (32) is a "Z"-shaped structure.

4. The circuit breaker mechanism according to claim 1, characterized in that: The circuit breaker mechanism is provided with a closing mechanism for driving the large crank arm (42) to perform closing rotation; the closing mechanism comprises a closing coil (51), a closing half shaft (52), a closing lever (53), a closing cam (54), a closing large shaft crank arm (55), a closing connecting rod (56) and the large crank arm (42); The closing coil (51) is fixedly arranged on the circuit breaker housing, the closing lever (53) and the closing half shaft (52) are rotatably arranged on the circuit breaker housing, the closing cam (54) is mounted on the energy storage shaft (1), the closing shaft crank arm (55) is arranged on the output main shaft (41), and the two ends of the closing connecting rod (56) are respectively connected to the crank arm (42) and the closing shaft crank arm (55); When the circuit breaker mechanism stores energy, the energy storage shaft (1) drives the closing cam (54) to abut against the closing lever (53), and the closing lever (53) abuts against the closing half shaft (52), and the energy storage is completed; When the circuit breaker mechanism is closed, the closing coil (51) drives the closing half shaft (52) to rotate, the closing lever (53) releases the restriction on the closing cam (54), the closing cam (54) drives the closing shaft crank arm (55) to rotate, and the closing shaft crank arm (55) drives the crank arm (42) to rotate for closing via the closing connecting rod (56).

5. The circuit breaker mechanism according to claim 1, characterized in that: The circuit breaker mechanism is provided with a switch-off mechanism for driving the large crank arm (42) to perform switch-off rotation; The opening mechanism comprises an opening coil (61), an opening half shaft (62), an opening lever (63), an opening latch (64), an opening large shaft crank arm (65), an opening connecting rod (66) and a large crank arm (42); The opening coil (61) is fixedly arranged on the circuit breaker housing, the opening lever (63) is installed on the energy storage shaft (1), the opening latch (64) is arranged on the opening lever (63), the opening shaft crank arm (65) is arranged on the output main shaft (41), and the opening connecting rod (66) has two ends respectively connected to the opening shaft crank arm (65) and the closing shaft crank arm (55); When the circuit breaker mechanism is opened, the opening coil (61) drives the opening half shaft (62) to rotate. After the opening lever (63) is released, the opening lever (63) drives the opening latch (64) to rotate, so that the opening latch (64) is released from the opening shaft crank arm (65), and the crank arm (42) performs opening rotation under the action of the opening spring (43).

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