An electric operating mechanism for a circuit breaker

Abstract

The present invention belongs to the technical field of electric operating mechanisms, and particularly relates to an electric operating mechanism for a circuit breaker, which is suitable for being connected to a circuit breaker mechanism. The electric operating mechanism includes a transmission mechanism and a double clutch mechanism, and the transmission mechanism is in transmission connection with the double clutch mechanism; the circuit breaker mechanism includes a energy storage main shaft and a rotating dial; the energy storage main shaft is in transmission connection with the double clutch mechanism and is suitable for driving the double clutch mechanism to the closed position. When the double clutch mechanism is in the closed state, the transmission mechanism drives the energy storage main shaft to rotate through the double clutch mechanism; when the circuit breaker mechanism operates to the closing position, the rotating dial rotates, so that the rotating dial drives the double clutch mechanism to the disengaged position. When the double clutch mechanism is in the separated state, the transmission cooperation between the transmission mechanism and the energy storage main shaft is disconnected. The electric operating mechanism of this circuit breaker has the effects of being able to achieve two-way separation of the circuit breaker mechanism, having a simple structure, a small installation volume, and a small processing cost.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric operating mechanisms, and particularly relates to an electric operating mechanism for a circuit breaker. Background Art

[0002] The electric operating mechanism of a circuit breaker is generally installed on one side of the circuit breaker during use and is used to cooperate to achieve the opening and closing of the circuit breaker.

[0003] The existing electric operating mechanism of a circuit breaker uses a clutch to achieve closing and opening. However, the existing one-way clutch cannot achieve two-way separation, and the structure of the two-way clutch is complex, large in volume, and high in cost. When installed on the electric operating mechanism, it is necessary to increase the volume of the electric operating mechanism, thereby making the installation volume of the electric operating mechanism large and having high requirements for the installation space. Summary of the Invention

[0004] The purpose of the present invention is to provide an electric operating mechanism for a circuit breaker to solve the technical problems of complex structure, large installation volume, and high use cost of the clutch mechanism in the existing electric operating mechanism.

[0005] To solve the above technical problems, the present invention provides an electric operating mechanism for a circuit breaker, which is suitable for connecting with a circuit breaker mechanism. The electric operating mechanism includes a transmission mechanism and a dual clutch mechanism, and the transmission mechanism is in transmission connection with the dual clutch mechanism;

[0006] The circuit breaker mechanism includes an energy storage main shaft and a rotating dial;

[0007] The energy storage main shaft is in transmission connection with the dual clutch mechanism and is suitable for driving the dual clutch mechanism to a closed position. When the dual clutch mechanism is in a closed state, the transmission mechanism drives the energy storage main shaft to rotate through the dual clutch mechanism;

[0008] When the circuit breaker mechanism operates to the closing position, the rotating dial rotates, so that the rotating dial drives the dual clutch mechanism to a disengaged position. When the dual clutch mechanism is in a separated state, the transmission cooperation between the transmission mechanism and the energy storage main shaft is disconnected.

[0009] Further: The dual clutch mechanism includes a driving member, a driven member, a control block, and a two-way holding mechanism;

[0010] The driving member and the driven member are rotatably arranged coaxially, and one end of the energy storage main shaft passes through the driven member and rotates synchronously with the driven member;

[0011] The control block includes a transfer portion and a clamping portion, and the control block is rotatably connected to the driven member through the transfer portion;

[0012] The driven member is provided with a disengaging position and a closing position, and the clamping portion of the control block reciprocates between the disengaging position and the closing position;

[0013] The bidirectional holding mechanism connects the control block and the follower;

[0014] The inner ring surface of the active member is provided with a plurality of clamping grooves for cooperating with the clamping portion of the control block;

[0015] The active member is connected to the transmission mechanism;

[0016] When the circuit breaker mechanism performs an opening operation, the energy storage main shaft drives the driven member and the control block to rotate counterclockwise, and the control block is forced to rotate clockwise. The clamping portion of the control block rotates to the closed position along with the driven member, and the clamping portion on the control block forms a clamping fit with the clamping groove of the active member. The bidirectional holding mechanism is suitable for keeping the clamping portion of the control block in the closed position, so that the transmission mechanism drives the energy storage main shaft to rotate through the active member, the control block, and the driven member in sequence;

[0017] When the circuit breaker mechanism is in the closing position, the rotary paddle drives the control block to rotate to the disengaging position, and the clamping portion on the control block disengages from the clamping groove of the active part. The bidirectional holding mechanism is suitable for keeping the clamping portion of the control block in the disengaging position, so that the transmission mechanism and the energy storage main shaft are disconnected from the transmission cooperation.

[0018] Furthermore: the control block includes a clamping block, a transmission block and a rotating shaft;

[0019] The rotating shaft is rotatably connected to the driven member;

[0020] The clamping block includes a transition portion and a clamping portion, the transition portion of the clamping block is connected to the rotating shaft and is suitable for synchronous rotation of the rotating shaft, and the clamping portion of the clamping block is suitable for matching with the clamping groove of the active component;

[0021] The transmission block includes a transfer portion and a connecting portion, the transfer portion of the transmission block is connected to the rotating shaft and is suitable for driving the rotating shaft to rotate, and the connecting portion of the transmission block is connected to the bidirectional holding mechanism;

[0022] When the circuit breaker mechanism is in the opening operation, the energy storage main shaft drives the driven member, the clamping block, and the transmission block to rotate counterclockwise. After the transmission block is subjected to force, it drives the clamping block to rotate on the driven member to the closed position via the rotating shaft. The clamping portion of the clamping block forms a clamping fit with the clamping groove of the active member. The bidirectional holding mechanism is suitable for keeping the clamping portion of the clamping block in the closed position, so that the transmission mechanism drives the energy storage main shaft to rotate through the active member, the clamping block, the transmission block, and the driven member in sequence.

[0023] When the circuit breaker mechanism is in the closing position, the rotating paddle drives the transmission block and the clamping block to rotate to the disengaging position in sequence, and the clamping portion on the clamping block disengages from the clamping groove of the active part. The bidirectional holding mechanism is suitable for keeping the clamping portion of the clamping block in the disengaging position, so that the transmission cooperation between the transmission mechanism and the energy storage main shaft is disconnected.

[0024] Further: the bidirectional holding mechanism includes a tension spring and a tension spring shaft, the tension spring shaft is fixedly connected to the follower, one end of the tension spring is connected to the tension spring shaft, and the other end of the tension spring is connected to the connecting part of the transmission block, and the adapter part of the transmission block is located between the tension spring shaft and the connecting part of the transmission block.

[0025] Furthermore: a bracket is fixedly arranged on the driven member, the tension spring shaft is fixedly arranged on the bracket, and the upper end of the rotating shaft passes through the bracket.

[0026] The beneficial effect of the present invention is that, in the electric operating mechanism of the circuit breaker of the present invention, the energy storage main shaft is transmission-connected to the dual-clutch mechanism, and is suitable for driving the dual-clutch mechanism to a closed position. When the dual-clutch mechanism is in a closed state, the transmission mechanism drives the energy storage main shaft to rotate via the dual-clutch mechanism.

[0027] When the circuit breaker mechanism operates to the closing position, the rotary paddle rotates to drive the dual-clutch mechanism to the disengaging position. When the dual-clutch mechanism is in the disengaged state, the transmission mechanism and the energy storage main shaft are disconnected from the transmission cooperation.

[0028] The electric operating mechanism can not only realize the bidirectional separation of the circuit breaker mechanism, but also has a simple structure, a small installation volume and a low processing cost.

[0029] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The purposes and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 is a perspective view of a preferred embodiment of Embodiment 1;

[0033] Figure 2 is a perspective view of a preferred embodiment when the control block of Embodiment 2 is at the closing station;

[0034] Figure 3 is a perspective view of a preferred embodiment of the driving member of Embodiment 2;

[0035] Figure 4 is a perspective view of a preferred embodiment of the driven member of Embodiment 2;

[0036] Figure 5 is a perspective view of a preferred embodiment of the control block of Embodiment 2;

[0037] Figure 6 is a perspective view of a preferred embodiment of the bi-directional holding mechanism of Embodiment 3.

[0038] In the figure:

[0039] 1, energy storage main shaft; 2, rotating paddle; 3, driving member; 31, clamping groove; 4, driven member; 41, closing station; 42, disengaging station; 5, control block; 51, clamping block; 511, clamping portion; 52, transmission block; 53, rotating shaft; 6, bi-directional holding mechanism; 61, tension spring; 62, tension spring shaft; 7, motor; 8, bracket; 9, stop pin. Specific embodiments

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0041] Embodiment 1:

[0042] As Figure 1 shown, this embodiment provides an electric operating mechanism for a circuit breaker, which is adapted to be connected to a circuit breaker mechanism.

[0043] The circuit breaker mechanism can refer to the prior patent application - a load switch capable of energy storage and rapid opening, application number: CN201910674301.5;

[0044] As Figure 1 shown, the electric operating mechanism includes a transmission mechanism and a dual-clutch mechanism that is drivingly connected to the transmission mechanism.

[0045] The circuit breaker mechanism includes a energy storage main shaft 1 and a rotating paddle 2. The circuit breaker mechanism also includes side plates, and the rotating paddle 2 is rotatably arranged on the side plates. Specifically, the energy storage main shaft 1 is in transmission connection with the dual clutch mechanism and is adapted to drive the dual clutch mechanism to the closed position 41. When the dual clutch mechanism is in the closed state, the transmission mechanism drives the energy storage main shaft 1 to rotate through the dual clutch mechanism.

[0046] When the circuit breaker mechanism operates to the closing position, the rotating paddle 2 performs a rotating operation to drive the dual clutch mechanism to the disengaged position 42. When the dual clutch mechanism is in the separated state, the transmission cooperation between the transmission mechanism and the energy storage main shaft 1 is disconnected.

[0047] Embodiment 2:

[0048] Embodiment 2 is a further improvement on the basis of Embodiment 1.

[0049] Figure 2 It is an optional perspective view of the dual clutch mechanism of the present invention;

[0050] Optionally, the dual clutch mechanism includes a driving member 3, a driven member 4, a control block 5 and a bi-directional holding mechanism 6.

[0051] Specifically, as Figures 2 to 4 shown, the driving member 3 and the driven member 4 are rotatably arranged coaxially. One end of the energy storage main shaft 1 passes through the driven member 4 and rotates synchronously with the driven member 4.

[0052] The control block 5 includes a transfer portion and a clamping portion. The control block 5 is rotatably connected to the driven member 4 through the transfer portion. The driven member 4 is provided with a disengaged position 42 and a closed position 41. The clamping portion of the control block 5 reciprocates between the disengaged position 42 and the closed position 41. The bi-directional holding mechanism 6 connects the control block 5 and the driven member 4. A plurality of clamping grooves 31 for cooperating with the clamping portion of the control block 5 are arranged on the inner circumferential surface of the driving member 3. The driving member 3 is connected to the transmission mechanism. Among them, the driving member 3 is a toothed ring, the transmission mechanism is a gear transmission mechanism, and the toothed ring meshes with the gear transmission mechanism.

[0053] As Figure 1 shown, the electric operating mechanism further includes a housing and a motor 7. The gear transmission mechanism and the dual clutch mechanism are both arranged in the housing. The gear transmission mechanism connects the motor 7 and the toothed ring. A stop pin 9 is fixedly connected to the inner side wall of the housing. In addition to driving the gear transmission mechanism to rotate through the motor 7, the gear transmission mechanism can also be driven to rotate manually.

[0054] As Figure 2As shown, when the circuit breaker mechanism performs the opening operation, the energy storage main shaft 1 drives the driven part 4 and the control block 5 to rotate counterclockwise. When the control block 5 is blocked by the stop pin 9 and rotates clockwise on the driven part 4, the clamping part of the control block 5 rotates with the driven part 4 to the closing position 41. The clamping part on the control block 5 forms a clamping fit with the clamping groove 31 of the active part 3. The two-way holding mechanism 6 is suitable for keeping the clamping part of the control block 5 in the closing position 41, so that the transmission mechanism drives the energy storage main shaft 1 to rotate through the active part 3, the control block 5 and the driven part 4 in sequence.

[0055] like Figure 1 As shown, when the circuit breaker mechanism is in the closing position, the rotary paddle 2 drives the control block 5 to rotate to the disengaging position 42, and the clamping portion on the control block 5 disengages from the clamping groove 31 of the active member 3. The bidirectional holding mechanism 6 is suitable for keeping the clamping portion of the control block 5 in the disengaging position 42, so that the transmission mechanism and the energy storage main shaft 1 are disconnected from the transmission cooperation.

[0056] Example 3:

[0057] Example 3 is a further improvement on Example 2.

[0058] Figure 5 is an optional three-dimensional diagram of the control block 5 of the present invention;

[0059] Optional, such as Figure 5 As shown, the control block 5 includes a coupling block 51, a transmission block 52, and a rotating shaft 53. The rotating shaft 53 is rotatably connected to the driven member 4. The transmission block 52 is disposed at the upper end of the rotating shaft 53, and the coupling block 51 is disposed at the lower end of the rotating shaft 53. A spacer is fixed to the rotating shaft 53, located between the transmission block 52 and the coupling block 51, to define the distance between the transmission block 52 and the coupling block 51.

[0060] Specifically, the clamping block 51 includes a connecting portion and a clamping portion 511. The connecting portion of the clamping block 51 is connected to the rotating shaft 53 (i.e., fixedly connected), suitable for synchronous rotation of the rotating shaft 53. The clamping portion 511 of the clamping block 51 is suitable for cooperating with the clamping groove 31 of the active part 3.

[0061] Specifically, the transmission block 52 includes a transition portion and a connection portion. The transition portion of the transmission block 52 is connected to the rotating shaft 53 and is suitable for driving the rotating shaft 53 to rotate. The connection portion of the transmission block 52 is connected to the bidirectional holding mechanism 6.

[0062] like Figure 2As shown, when the circuit breaker mechanism is in the opening operation, the energy storage main shaft 1 drives the driven part 4, the clamping block 51, and the transmission block 52 to rotate counterclockwise. After the transmission block 52 is blocked by the stop pin 9, the transmission block 52 drives the clamping block 51 to rotate on the driven part 4 to the closing position 41 via the rotating shaft 53. The clamping portion 511 of the clamping block 51 forms a clamping fit with the clamping groove 31 of the active part 3. The two-way holding mechanism 6 is suitable for keeping the clamping portion 511 of the clamping block 51 in the closing position 41, so that the gear transmission mechanism drives the energy storage main shaft 1 to rotate through the active part 3, the clamping block 51, the transmission block 52, and the driven part 4 in sequence.

[0063] like Figure 1 As shown, when the circuit breaker mechanism is in the closing position, the rotating paddle 2 drives the transmission block 52 and the clamping block 51 to rotate to the disengagement position 42 in sequence, and the clamping portion 511 on the clamping block 51 disengages from the clamping groove 31 of the active member 3. The bidirectional holding mechanism 6 is suitable for keeping the clamping portion 511 of the clamping block 51 in the disengagement position 42, so that the transmission cooperation between the gear transmission mechanism and the energy storage main shaft 1 is disconnected.

[0064] Figure 6 It is an optional three-dimensional diagram of the bidirectional holding mechanism 6 of the present invention;

[0065] Optionally, the bidirectional holding mechanism 6 includes a tension spring 61 and a tension spring shaft 62, the tension spring shaft 62 is fixedly connected to the follower 4, one end of the tension spring 61 is connected to the tension spring shaft 62, and the other end of the tension spring 61 is connected to the connecting part of the transmission block 52, and the connecting part of the transmission block 52 is located between the tension spring shaft 62 and the connecting part of the transmission block 52.

[0066] In this embodiment, the connecting portion of the transmission block 52 is a pin shaft, which is fixedly arranged on the transmission block 52 . The pin shaft has the same function as the tension spring 61 shaft, and both are used to connect the tension spring 61 .

[0067] Figure 6 is an optional three-dimensional view of the bracket 8 of the present invention;

[0068] Optionally, a bracket 8 is fixedly provided on the follower 4, the tension spring shaft 62 is fixedly provided on the bracket 8, and the upper end of the rotating shaft 53 passes through the bracket 8. The bracket 8 can increase the support and transmission strength of the rotating shaft 53.

[0069] In summary,

[0070] When the circuit breaker mechanism is in the opening operation, the energy storage main shaft 1 drives the driven member 4, the clamping block 51, and the transmission block 52 to rotate counterclockwise. After the transmission block 52 is blocked by the stop pin 9, the transmission block 52 drives the clamping block 51 to rotate on the driven member 4 to the closing position 41 through the rotating shaft 53. The pin shaft center on the connecting portion of the transmission block 52 crosses the center connection line between the rotating shaft 53 center and the tension spring shaft 62 center. The tension spring shaft 62 drives the transmission block 52 to rotate, the transmission block 52 drives the rotating shaft 53 to rotate, the rotating shaft 53 drives the clamping block 51 to rotate, and the clamping portion 511 of the clamping block 51 forms a clamping fit with the clamping groove 31 of the driving member 3 and maintains the clamping under the action of the tension spring 61, so that the gear transmission mechanism drives the energy storage main shaft 1 to rotate through the driving member 3, the clamping block 51, the transmission block 52, and the driven member 4 in sequence.

[0071] When the circuit breaker mechanism is in the closing position, the rotating dial 2 drives the transmission block 52 and the clamping block 51 to rotate to the disengaging position 42 in sequence. The pin shaft center on the connecting portion of the transmission block 52 crosses the center connection line between the rotating shaft 53 center and the tension spring shaft 62 center. The tension spring shaft 62 drives the transmission block 52 to rotate, the transmission block 52 drives the rotating shaft 53 to rotate, the rotating shaft 53 drives the clamping block 51 to rotate, so that the clamping portion 511 on the clamping block 51 disengages from the clamping groove 31 of the driving member 3 and maintains the disengagement under the action of the tension spring 61, so as to disconnect the transmission cooperation between the driving member 3 and the energy storage main shaft 1.

[0072] The electric operating mechanism in this utility model can not only achieve the two-way separation of the circuit breaker mechanism, but also has a simple structure, a small installation volume, and a small processing cost.

[0073] All the device components selected in this application are common standard components or components known to those skilled in the art, and their structures and principles can all be known by those skilled in the art through technical manuals or through conventional experimental methods.

[0074] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" 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. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0075] In several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. The device embodiments described above are only illustrative.

[0076] Taking the above-mentioned ideal embodiments of the present invention as inspiration, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An electric operating mechanism for a circuit breaker, adapted to be connected to a circuit breaker mechanism, characterized in that, The electric operating mechanism comprises a transmission mechanism and a dual clutch mechanism, wherein the transmission mechanism is in transmission connection with the dual clutch mechanism; the circuit breaker mechanism comprises an energy storage main shaft (1) and a rotating paddle (2); the energy storage main shaft (1) is in transmission connection with the dual clutch mechanism and is suitable for driving the dual clutch mechanism to a closed position (41); when the dual clutch mechanism is in a closed state, the transmission mechanism drives the energy storage main shaft (1) to rotate via the dual clutch mechanism; when the circuit breaker mechanism is operated to the closed position, the rotating paddle (2) rotates so that the rotating paddle (2) drives the dual clutch mechanism to a disengaged position (42); when the dual clutch mechanism is in a disengaged state, the transmission between the transmission mechanism and the energy storage main shaft (1) is disconnected. The dual clutch mechanism comprises an active member (3), a driven member (4), a control block (5) and a bidirectional holding mechanism (6); the active member (3) and the driven member (4) are arranged to rotate coaxially, one end of the energy storage spindle (1) passes through the driven member (4) and rotates synchronously with the driven member (4); the control block (5) is rotatably connected to the driven member (4) via a switching portion; a disengagement position (42) and a closing position (41) are provided on the driven member (4), and a clamping portion of the control block (5) reciprocates between the disengagement position (42) and the closing position (41); the bidirectional holding mechanism (6) connects the control block (5) and the driven member (4); a plurality of clamping members for engaging with the control block are provided on the inner ring surface of the active member (3); (5) a snap-fitting groove (31) of the snap-fitting portion; the active member (3) is connected to the transmission mechanism; when the circuit breaker mechanism performs a tripping operation, the energy storage main shaft (1) drives the driven member (4) and the control block (5) to rotate counterclockwise, and after the control block (5) is blocked by the stop pin (9), the control block (5) rotates clockwise on the driven member (4), and the control block (5) is forced to rotate clockwise, and the snap-fitting portion of the control block (5) rotates with the driven member (4) to the closed position (41), and the snap-fitting portion on the control block (5) forms a snap-fitting with the snap-fitting groove (31) of the active member (3), and the bidirectional holding mechanism (6) is suitable for keeping the snap-fitting portion of the control block (5) in the closed position (41), so that the transmission mechanism passes through the main shaft (4) in sequence. The driving member (3), the control block (5), and the driven member (4) drive the energy storage main shaft (1) to rotate; when the circuit breaker mechanism is in the closing position, the rotating paddle (2) drives the control block (5) to rotate to the disengaging position (42), the clamping portion on the control block (5) is disengaged from the clamping groove (31) of the driving member (3), and the bidirectional holding mechanism (6) is suitable for keeping the clamping portion of the control block (5) in the disengaging position (42), so that the transmission mechanism and the energy storage main shaft (1) are disconnected from the transmission cooperation; the control block (5) includes a clamping block (51), a transmission block (52), and a rotating shaft (53); the rotating shaft (53) is rotatably connected to the driven member (4); the clamping block (51) includes a transition portion and a clamping portion (511); The connecting portion of the transmission block (52) is a pin.

2. The electric operating mechanism of the circuit breaker according to claim 1, characterized in that, The transfer portion of the clamping block (51) is connected to the rotating shaft (53) and is adapted to rotate synchronously with the rotating shaft (53). The clamping portion (511) of the clamping block (51) is adapted to cooperate with the clamping groove (31) of the driving member (3). The transmission block (52) includes a transfer portion and a connecting portion. The transfer portion of the transmission block (52) is connected to the rotating shaft (53) and is adapted to drive the rotating shaft (53) to rotate. The connecting portion of the transmission block (52) is connected to the bi-directional holding mechanism (6). When the circuit breaker mechanism is in the opening operation, the energy storage main shaft (1) drives the driven member (4), the clamping block (51), and the transmission block (52) to rotate counterclockwise. After the transmission block (52) is stressed, it drives the clamping block (51) to rotate on the driven member (4) to the closing position (41) through the rotating shaft (53). The clamping portion (511) of the clamping block (51) forms a clamping fit with the clamping groove (31) of the driving member (3). The bi-directional holding mechanism (6) is adapted to keep the clamping portion (511) of the clamping block (51) at the closing position (41), so that the transmission mechanism drives the energy storage main shaft (1) to rotate in sequence through the driving member (3), the clamping block (51), the transmission block (52), and the driven member (4). When the circuit breaker mechanism is in the closing position, the rotating dial (2) drives the transmission block (52) and the clamping block (51) to rotate to the disengaging position (42) in sequence. The clamping portion (511) on the clamping block (51) disengages from the clamping groove (31) of the driving member (3). The bi-directional holding mechanism (6) is adapted to keep the clamping portion (511) of the clamping block (51) at the disengaging position (42), so that the transmission cooperation between the transmission mechanism and the energy storage main shaft (1) is disconnected.

3. The electric operating mechanism of the circuit breaker according to claim 1, characterized in that, The bi-directional holding mechanism (6) includes a tension spring (61) and a tension spring shaft (62). The tension spring shaft (62) is fixedly connected to the driven member (4). One end of the tension spring (61) is connected to the tension spring shaft (62), and the other end of the tension spring (61) is connected to the connecting portion of the transmission block (52). The transfer portion of the transmission block (52) is located between the tension spring shaft (62) and the connecting portion of the transmission block (52).

4. The electric operating mechanism of the circuit breaker according to claim 3, characterized in that, A bracket (8) is fixedly arranged on the driven member (4). The tension spring shaft (62) is fixedly arranged on the bracket (8). The upper end of the rotating shaft (53) passes through the bracket (8).

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