Double-breakpoint circuit breaker module and circuit breaker

Abstract

The invention relates to a double-breakpoint circuit breaker module and a circuit breaker, and belongs to the technical field of circuit breakers. The double-face support and the double-face shell are arranged on the rotor part and matched with the double-piece movable contact bridge to form the double-breakpoint circuit breaker module arranged in the circuit breaker, each piece of the double-piece movable contact bridge can independently provide contact pressure, the contact performance is more excellent, the heat dissipation area of the movable contact bridge can be effectively increased, and the service life of the double-piece movable contact bridge is prolonged. And the overall temperature rise of the switch is better.

Description

Technical Field

[0001] This invention relates to a dual-break circuit breaker module and a circuit breaker, belonging to the field of circuit breaker technology. Background Technology

[0002] Double-break circuit breakers are key protection components in low-voltage power distribution systems. The core of the circuit breaking is achieved through reliable contact between the moving contact bridge and the stationary contact. Existing modules apply contact pressure by directly pressing the upper surface of the moving contact bridge with a drive shaft, and ensure contact with the preload of the return spring. This structure is widely used because of its short transmission path and compactness. This surface contact pressure application method has inherent defects: under normal working conditions, the moving contact bridge is prone to deformation due to Joule heat. When there is a fault such as a short circuit, the instantaneous electrodynamic force between the moving contact bridge and the stationary contact will form a repulsive tendency. The single contact surface lacks multi-point support, which can easily lead to contact bouncing or even separation, causing problems such as arc erosion and safety hazards. The industry commonly uses increasing the spring preload to alleviate the repulsion problem, but this increases operating resistance and mechanical loss, exacerbates contact wear, and goes against the trend of module miniaturization. It is difficult to meet the comprehensive requirements of reliability, lifespan, and lightweight design, and there is an urgent need for a new contact pressure application structure to break through the technical bottleneck. Summary of the Invention

[0003] To address the aforementioned problems, in a first aspect, the present invention provides a dual-breakpoint circuit breaker module, comprising: The rotor has an O-shaped structure and is provided with a receiving cavity; The bracket is assembled on both sides of the rotor via bracket fasteners and the first shaft of the bracket; A movable contact bridge, which is installed through the receiving cavity, includes a first movable contact bridge and a second movable contact bridge arranged side by side, and movable contacts at both ends of the first movable contact bridge and the second movable contact bridge extend out of the receiving cavity; The housing includes a left housing and a right housing, which are respectively mounted on both sides of the rotor and cover the support.

[0004] Furthermore, the first recess of the rotor is inserted into the first protrusion of the left outer shell, the second recess of the rotor is inserted into the second protrusion of the left outer shell, and the first mating surface of the rotor mates with the mating surface of the left outer shell; the third recess of the rotor is inserted into the first protrusion of the right outer shell, the fourth recess of the rotor is inserted into the second protrusion of the right outer shell, and the second mating surface of the rotor mates with the mating surface of the right outer shell.

[0005] Furthermore, when the circuit breaker module is in the closed state, the first mating surface of the receiving cavity mates with the first mating surface of the first moving contact bridge and the first mating surface of the second moving contact bridge; the first hole of the rotor is a through hole and is inserted into the first shaft of the rotor, the second hole of the rotor is a through hole and is also inserted into the first shaft of the rotor; the third hole of the rotor is inserted into the second shaft of the rotor. The bracket has a U-shaped structure; the first mating surface of the bracket mates with the third mating surface of the rotor, and the second mating surface of the bracket mates with the third mating surface of the rotor; the first and second round keys of the bracket are installed on the first shaft of the rotor; the first hole and the second hole of the bracket are simultaneously installed on the shaft.

[0006] Furthermore, when the circuit breaker module is in the open state, the first and second open surfaces of the bracket are in contact with the first shaft of the moving contact bridge; when the circuit breaker module is in the closed state, the first and second closed surfaces of the bracket are in contact with the first shaft of the moving contact bridge; when the circuit breaker module is in the repulsive state, the first and second repulsive surfaces of the bracket are in contact with the shaft. The shapes of the open, close, and repulsive surfaces of the bracket are not unique, and curved surfaces can achieve the same function as straight lines.

[0007] Furthermore, the first hole of the bracket fixing component is connected to the first shaft of the rotor; the second hole of the bracket fixing component is connected to the first shaft of the bracket; each bracket corresponds to one bracket fixing component.

[0008] Furthermore, both the first and second moving contact bridges are centrally symmetrical structures and have identical shapes.

[0009] Furthermore, the first moving contact bridge has a first moving contact bridge first hole at its rotation center; when the circuit breaker module is in the closed state, the first mating surface of the first moving contact bridge mates with the first mating surface of the receiving cavity; the first moving contact bridge first hole is a through hole and is installed on the rotor second shaft; the first moving contact bridge second hole is also a through hole and is used to install the moving contact bridge first shaft; when the circuit breaker module is in the closed state, the first moving contact bridge groove is used to place the bracket first shaft; the first moving contact bridge has a first recess on one side; the first moving contact bridge has a first recessed hole on the recessed side for installing the second moving contact bridge protrusion of the second moving contact bridge; The rotation center of the second moving contact bridge is the first hole of the second moving contact bridge; when the circuit breaker module is in the closed state, the first mating surface of the second moving contact bridge mates with the first mating surface of the receiving cavity; the first hole of the second moving contact bridge is a through hole and is installed on the second shaft of the rotor; the second hole of the second moving contact bridge is also a through hole and is used to install the first shaft; when the circuit breaker module is in the closed state, the groove of the second moving contact bridge is responsible for placing the first shaft of the support; the second moving contact bridge has a second moving contact bridge recess on one side; the second moving contact bridge has a second moving contact bridge protrusion on the recessed side, which is used to insert into the first recessed hole of the first moving contact bridge.

[0010] Secondly, the present invention also provides a circuit breaker having the aforementioned double-break circuit breaker module.

[0011] The beneficial effects of this invention are: This invention constructs a double-break circuit breaker module inside the circuit breaker by setting a double-sided bracket, a double-sided outer shell, and a double-piece moving contact bridge in the rotor part. Each piece of the double-piece moving contact bridge can not only provide contact pressure independently, making the contact performance better, but also effectively increase the heat dissipation area of ​​the moving contact bridge, making the overall temperature rise of the switch better.

[0012] Compared to the existing single-contact bridge structure, which requires increasing spring force and contact pressure to achieve better short-term endurance performance, the combination of the double-plate moving contact bridge and the novel support in this invention can achieve greater contact pressure with less spring force, making it easier to achieve better short-term endurance performance.

[0013] In addition, the dual-piece moving contact bridge can be self-locked separately, providing excellent current limiting capability. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of an existing dual-break circuit breaker module; Figure 2 This is an assembly diagram of the dual-breakpoint circuit breaker module of the present invention; Figure 3 This is a schematic diagram of the rotor structure; Figure 4 This is a schematic diagram of the left outer shell; Figure 5 This is a schematic diagram of the right outer shell; Figure 6 This is a schematic diagram of the support structure; Figure 7 This is a structural diagram of the bracket fixing component; Figure 8 This is a schematic diagram of the structure of the first moving contact bridge; Figure 9 This is a schematic diagram of the second moving contact bridge; Figure 10 This is an assembly diagram of two moving contact bridges; Figure 11 This is a schematic diagram of the circuit breaker module's operation. Figure 12 This is a schematic diagram showing the contact pressure provided on both sides of the bracket; Figure 13 This is a schematic diagram showing the pressure of the support in the closed position and the dead point position; Figure 14 This is a schematic diagram of the pressure at the repulsion position of the support; Figure 15 This is a schematic diagram illustrating the function of the bracket fixing component; Figure 16 This is a schematic diagram of the linkage between the first and second moving contact bridges; In the diagram, 1. Rotor; 2. Left outer shell; 3. Right outer shell; 4. Bracket; 5. Bracket fixing component; 6. First moving contact bridge; 7. Second moving contact bridge; 8. Moving contact; 9. First shaft of rotor; 10. First shaft of bracket; 11. Second shaft of rotor; 12. First shaft of moving contact bridge; 1-1-1. First recess of rotor; 1-1-2. Second recess of rotor; 1-1-3. Third recess of rotor; 1-1-4. Fourth recess of rotor; 1-2-1. First mating surface of rotor; 1-2-2. Second mating surface of rotor. Surface mating; 1-3-1, Rotor third mating surface; 1-3-2, Rotor third mating surface; 1-4, Receiving cavity; 1-4-1, Receiving cavity first mating surface; 1-5-1, Rotor first hole; 1-5-2, Rotor second hole; 1-6, Rotor third hole; 2-1-1, Left outer shell first protrusion; 2-1-2, Left outer shell second protrusion; 2-2, Left outer shell mating surface; 3-1-1, Right outer shell first protrusion; 3-1-2, Right outer shell second protrusion; 3-2, Right outer shell mating surface; 4- 1-1, First mating surface of the bracket; 4-1-2, Second mating surface of the bracket; 4-2-1, First round key of the bracket; 4-2-2, Second round key of the bracket; 4-3-1, First hole of the bracket; 4-3-2, Second hole of the bracket; 4-4-1, First opening surface of the bracket; 4-4-2, Second opening surface of the bracket; 4-5-1, First closing surface of the bracket; 4-5-2, Second closing surface of the bracket; 4-6-1, First repulsion surface of the bracket; 4-6-2, Second repulsion surface of the bracket; 5-1, First hole of the bracket fixing component. 5-2, Second hole of bracket fixing component; 6-1, First mating surface of first moving contact bridge; 6-3, First hole of first moving contact bridge; 6-4, Second hole of first moving contact bridge; 6-5, Groove of first moving contact bridge; 6-6, First recess of first moving contact bridge; 6-7, Recessed hole of first moving contact bridge; 7-1, First mating surface of second moving contact bridge; 7-3, First hole of second moving contact bridge; 7-4, Second hole of second moving contact bridge; 7-5, Groove of second moving contact bridge; 7-6, Recess of second moving contact bridge; 7-7, Protrusion of second moving contact bridge. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] In this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0017] In this invention, the terms "first" and "second" are used only to distinguish similar components / parts in different positions or with different characteristics, and have no other limiting meaning; "upper" refers to the direction in which each component is away from the ground, and "lower" refers to the direction in which each component is away from the ground.

[0018] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0019] This invention provides a dual-break circuit breaker module, mainly comprising a rotor 1, brackets 4 mounted on both sides of the rotor 1, and two moving contact bridges mounted inside the rotor 1. Specifically, it includes: In some embodiments, the rotor 1 has an O-shaped structure and is provided with a receiving cavity 1-4; the bracket 4 is assembled to both sides of the rotor 1 by the bracket fixing member 5 and the bracket first shaft 10; the moving contact bridge is assembled through the receiving cavity 1-4, including a first moving contact bridge 6 and a second moving contact bridge 7 arranged side by side, and the moving contact points 8 provided at both ends of the first moving contact bridge 6 and the second moving contact bridge 7 both extend out of the receiving cavity 1-4; the outer shell includes a left outer shell 2 and a right outer shell 3 respectively assembled to both sides of the rotor 1 and covering the bracket 4.

[0020] In some embodiments, the first recess 1-1-1 of the rotor is inserted into the first protrusion 2-1-1 of the left outer shell, the second recess 1-1-2 of the rotor is inserted into the second protrusion 2-1-2 of the left outer shell, and the first mating surface 1-2-1 of the rotor mates with the mating surface 2-2 of the left outer shell; the third recess 1-1-3 of the rotor is inserted into the first protrusion 3-1-1 of the right outer shell, the fourth recess 1-1-4 of the rotor is inserted into the second protrusion 3-1-2 of the right outer shell, and the second mating surface 1-2-2 of the rotor mates with the mating surface 3-2 of the right outer shell.

[0021] In some embodiments, when the circuit breaker module is in the closed state, the first mating surface 1-4-1 of the receiving cavity mates with the first mating surface 6-1 of the first moving contact bridge 6 and the first mating surface 7-1 of the second moving contact bridge 7; the first hole 1-5-1 of the rotor is a through hole and is inserted into the first shaft 9 of the rotor, the second hole 1-5-2 of the rotor is a through hole and is also inserted into the first shaft 9 of the rotor; the third hole 1-6 of the rotor is inserted into the second shaft 11 of the rotor.

[0022] In some embodiments, the left outer shell 2 is an "O" shaped structure; the right outer shell 3 is also an "O" shaped structure.

[0023] In some embodiments, the bracket 4 has a "U" shaped structure; the first mating surface 4-1-1 of the bracket mates with the third mating surface 1-3-1 of the rotor, and the second mating surface 4-1-2 of the bracket mates with the third mating surface 1-3-2 of the rotor; the first round key 4-2-1 and the second round key 4-2-2 of the bracket 4 are mounted on the first shaft 9 of the rotor; the first hole 4-3-1 and the second hole 4-3-2 of the bracket are simultaneously mounted on the shaft 10.

[0024] In some implementations, when the circuit breaker module is in the open state, the first open surface 4-4-1 and the second open surface 4-4-2 of the bracket are in contact with the first shaft 12 of the moving contact bridge; when the circuit breaker module is in the closed state, the first closed surface 4-5-1 and the second closed surface 4-5-2 of the bracket are in contact with the first shaft 12 of the moving contact bridge; when the circuit breaker module is in the repulsive state, the first repulsive surface 4-6-1 and the second repulsive surface 4-6-2 of the bracket are in contact with the shaft 12. The shapes of the open, closed, and repulsive surfaces of the bracket are not unique; curved surfaces can achieve the same function as straight lines.

[0025] In some embodiments, the first hole 5-1 of the bracket fixing member 5 is connected to the first shaft 9 of the rotor; the second hole 5-2 of the bracket fixing member is connected to the first shaft 10 of the bracket; each bracket 4 corresponds to one bracket fixing member.

[0026] In some embodiments, the first moving contact bridge 6 and the second moving contact bridge are both centrally symmetrical structures and have the same shape.

[0027] In some embodiments, the first moving contact bridge 6 has a first moving contact bridge first hole 6-3 at its rotation center; when the circuit breaker module is in the closed state, the first moving contact bridge first mating surface 6-1 mates with the first mating surface 1-4-1 of the receiving cavity; the first moving contact bridge first hole 6-3 is a through hole and is installed on the rotor second shaft 11; the first moving contact bridge second hole 6-4 is also a through hole and is used to install the moving contact bridge first shaft 12; when the circuit breaker module is in the closed state, the first moving contact bridge groove 6-5 is used to place the bracket first shaft 10; the first moving contact bridge 6 has a first recess 6-6 on one side; the first moving contact bridge 6 has a first recessed hole 6-7 on the recessed side for installing the second moving contact bridge protrusion 7-7 of the second moving contact bridge 7; In some embodiments, the rotation center of the second moving contact bridge 7 is the first hole 7-3 of the second moving contact bridge; when the circuit breaker module is in the closed state, the first mating surface 7-1 of the second moving contact bridge mates with the first mating surface 1-4-1 of the receiving cavity; the first hole 7-3 of the second moving contact bridge is a through hole and is installed on the second shaft 11 of the rotor; the second hole 7-4 of the second moving contact bridge is also a through hole and is used to install the first shaft 12; when the circuit breaker module is in the closed state, the groove 7-5 of the second moving contact bridge is responsible for placing the first shaft 10 of the bracket; the second moving contact bridge 7 has a second moving contact bridge recess 7-6 on one side; the second moving contact bridge 7 has a second moving contact bridge protrusion 7-7 on the side with the recess, which is used to insert into the first recessed hole 6-7 of the first moving contact bridge 6.

[0028] Example 1 This embodiment provides a circuit breaker equipped with the aforementioned double-break circuit breaker module.

[0029] The entire circuit breaker module can be divided into three working states: open, closed, and repulsive.

[0030] When the circuit breaker module is in the open state, the first open surface 4-4-1 and the second open surface 4-4-2 of the bracket 4 are in contact with the first shaft 12 of the moving contact bridge; during the process of the moving contact moving to the stationary contact, the first shaft 12 of the moving contact bridge moves from the first open surface 4-4-1 and the second open surface 4-4-2 of the bracket 4 to the first closing surface 4-5-1 and the second closing surface 4-5-2 of the bracket 4; when the moving contact and the stationary contact complete the contact, the circuit breaker module enters the closed state.

[0031] When the circuit breaker module is in the closed state, the first closing surface 4-5-1 and the second closing surface 4-5-2 of the bracket 4 are in contact with the first shaft 12 of the moving contact bridge; when an electric repulsive force is generated, the contact pressure generated by the bracket 4 will press the first moving contact bridge 6 and the second moving contact bridge 7 back onto the stationary contact.

[0032] When the circuit breaker module is in the open state, the first open surface 4-6-1 and the second open surface 4-6-2 of the bracket 4 are in contact with the first shaft 12 of the moving contact bridge. Figure 11 Regarding the simultaneous application of contact pressure from both sides of the bracket: Both the first closing surface 4-5-1 and the second closing surface 4-5-2 of the bracket 4 can press against the first shaft 12 of the moving contact bridge, and the contact pressure generated by the bracket 4 can be applied simultaneously to both sides of the first moving contact bridge 6 and the second moving contact bridge 7. Figure 12 Regarding the changes in the force exerted by the stent: When the circuit is closed, the pressure of bracket 4 is far from the center of rotation, which allows for greater contact pressure with less spring force, thus improving transmission efficiency. During the process from the closed position to the dead-point position, the spring reaches its maximum deformation position, but the moving contact bridge can be raised to a higher height, resulting in lower spring deformation. (Figure 13) After the moving contact bridge is pushed open, it is subjected to a large pressure from the support 4, and the pushing surface is concave, making it difficult for the moving contact bridge to fall back, thus achieving self-locking. The pressure from the support 4 is close to the center of rotation, so the torque on the moving contact bridge is small, and the mechanism is easy to reset. Figure 14.

[0033] Regarding bracket fasteners: The dual-break circuit breaker module of the present invention has two moving contact bridges, each corresponding to two supports 4. Since the support 4 is only installed with a spring on one side, the support 4 will be deformed by the spring force on one side. Therefore, it is necessary to add a support fixing part 5 to counteract the effect of the force on one side of the support 4. Figure 15 Regarding the linkage between the first moving contact bridge 6 and the second moving contact bridge 7: When existing circuit breaker modules encounter short-term high current during operation, the entire circuit is prone to interruption due to the sudden increase in electrodynamic repulsion, and the stability of the entire system cannot be guaranteed. The new circuit breaker module adopts a double contact bridge structure. When the circuit encounters the same short-term high current, the double contact bridge structure can reduce the electrodynamic repulsion on a single moving contact bridge.

[0034] The protrusion 7-7 of the second moving contact bridge 7 inserts into the recessed hole 6-7 of the first moving contact bridge 6, allowing the first moving contact bridge 6 and the second moving contact bridge 7 to move in tandem within a certain range: During closing, if the contact pressure of the second moving contact bridge 7 is greater, it can provide contact pressure to the first moving contact bridge 6; if the moving contact of the first moving contact bridge 6 is excessively worn, resulting in reduced overtravel, the second moving contact bridge 7 can provide contact pressure to the first moving contact bridge 6. If the second moving contact bridge 7 is lifted by the electric force F2, the contact pressure F1 of the first moving contact bridge 6 will counteract F2, and the lifted second moving contact bridge 7 will quickly reclose under the force of the first moving contact bridge 6, preventing the first moving contact bridge 6 and the second moving contact bridge 7 from simultaneously repelling each other. During repulsion, if the second moving contact bridge 7 acts first, its repulsion force F2 can increase the contact pressure F1 of the subsequently acting first moving contact bridge 6, causing the first moving contact bridge 6 and the second moving contact bridge 7 to move in tandem. Simultaneously, the repulsion reduces the repulsion time of the circuit breaker module; at the same time, the protrusion 7-7 of the second moving contact bridge and the recessed hole 6-7 of the first moving contact bridge can prevent the first moving contact bridge 6 and the second moving contact bridge 7 from attracting each other.

[0035] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.

Claims

1. A dual-break circuit breaker module, characterized in that, include: The rotor (1) has an O-shaped structure and is provided with a receiving cavity (1-4). The bracket (4) is assembled on both sides of the rotor (1) via the bracket fastener (5) and the bracket first shaft (10); The movable contact bridge is installed through the receiving cavity (1-4) and includes a first movable contact bridge (6) and a second movable contact bridge (7) arranged side by side. The movable contacts (8) at both ends of the first movable contact bridge (6) and the second movable contact bridge (7) extend out of the receiving cavity (1-4). The housing includes a left housing (2) and a right housing (3) respectively mounted on both sides of the rotor (1) and covering the support (4).

2. The dual-break circuit breaker module according to claim 1, characterized in that, The first recess (1-1-1) of the rotor is inserted into the first protrusion (2-1-1) of the left outer shell, the second recess (1-1-2) of the rotor is inserted into the second protrusion (2-1-2) of the left outer shell, and the first mating surface (1-2-1) of the rotor mates with the mating surface (2-2) of the left outer shell; the third recess (1-1-3) of the rotor is inserted into the first protrusion (3-1-1) of the right outer shell, the fourth recess (1-1-4) of the rotor is inserted into the second protrusion (3-1-2) of the right outer shell, and the second mating surface (1-2-2) of the rotor mates with the mating surface (3-2) of the right outer shell.

3. The dual-break circuit breaker module according to claim 2, characterized in that, When the circuit breaker module is in the closed state, the first mating surface (1-4-1) of the receiving cavity is mated with the first mating surface (6-1) of the first moving contact bridge (6) and the first mating surface (7-1) of the second moving contact bridge (7); the first hole (1-5-1) of the rotor is a through hole and is inserted by the first shaft (9) of the rotor, the second hole (1-5-2) of the rotor is a through hole and is also inserted by the first shaft (9) of the rotor; the third hole (1-6) of the rotor is inserted by the second shaft (11) of the rotor.

4. The dual-break circuit breaker module according to claim 3, characterized in that, The left outer shell (2) has an "O" shaped structure; the right outer shell (3) also has an "O" shaped structure.

5. The dual-break circuit breaker module according to claim 4, characterized in that, The bracket (4) has a "U" shaped structure; the first mating surface (4-1-1) of the bracket is mated with the third mating surface (1-3-1) of the rotor, and the second mating surface (4-1-2) of the bracket is mated with the third mating surface (1-3-2) of the rotor; the first round key (4-2-1) and the second round key (4-2-2) of the bracket (4) are installed on the first shaft (9) of the rotor; the first hole (4-3-1) and the second hole (4-3-2) of the bracket are simultaneously installed on the shaft (10).

6. The dual-break circuit breaker module according to claim 5, characterized in that, When the circuit breaker module is in the open state, the first open surface (4-4-1) and the second open surface (4-4-2) of the bracket are in contact with the first shaft (12) of the moving contact bridge; When the circuit breaker module is in the closed state, the first closing surface (4-5-1) and the second closing surface (4-5-2) of the bracket are in contact with the first shaft (12) of the moving contact bridge; When the circuit breaker module is in the repulsion state, the first repulsion surface (4-6-1) and the second repulsion surface (4-6-2) of the bracket are in contact with the shaft (12).

7. The dual-break circuit breaker module according to claim 6, characterized in that, The first hole (5-1) of the bracket fixing part (5) is connected to the first shaft (9) of the rotor; the second hole (5-2) of the bracket fixing part is connected to the first shaft (10) of the bracket; each bracket (4) corresponds to one bracket fixing part.

8. The dual-break circuit breaker module according to claim 7, characterized in that, The first moving contact bridge (6) and the second moving contact bridge are both centrally symmetrical structures and have the same shape.

9. The dual-break circuit breaker module according to claim 8, characterized in that, The first moving contact bridge (6) has a first moving contact bridge first hole (6-3) at its rotation center; when the circuit breaker module is in the closed state, the first moving contact bridge first mating surface (6-1) mates with the first mating surface (1-4-1) of the receiving cavity; the first moving contact bridge first hole (6-3) is a through hole and is installed on the rotor second shaft (11); the first moving contact bridge second hole (6-4) is also a through hole and is used to install the moving contact bridge first shaft (12); when the circuit breaker module is in the closed state, the first moving contact bridge groove (6-5) is used to place the bracket first shaft (10); the first moving contact bridge (6) has a first recess (6-6) on one side; the first moving contact bridge (6) has a first recess hole (6-7) on the recessed side for installing the second moving contact bridge protrusion (7-7) of the second moving contact bridge (7); The rotation center of the second moving contact bridge (7) is the first hole (7-3) of the second moving contact bridge; when the circuit breaker module is in the closed state, the first mating surface (7-1) of the second moving contact bridge mates with the first mating surface (1-4-1) of the receiving cavity; the first hole (7-3) of the second moving contact bridge is a through hole and is installed on the second shaft (11) of the rotor; the second hole (7-4) of the second moving contact bridge is also a through hole and is used to install the first shaft (12); when the circuit breaker module is in the closed state, the groove (7-5) of the second moving contact bridge is responsible for placing the first shaft (10) of the bracket; the second moving contact bridge (7) has a second moving contact bridge recess (7-6) on one side; the second moving contact bridge (7) has a second moving contact bridge protrusion (7-7) on the side with the recess, which is used to insert into the first recessed hole (6-7) of the first moving contact bridge (6).

10. A circuit breaker, characterized in that, The circuit breaker module according to any one of claims 1-9 is provided.

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