A circuit breaker instantaneous mechanism and circuit breaker

Abstract

The application provides a circuit breaker instantaneous mechanism and a circuit breaker, and relates to the technical field of circuit breakers. The circuit breaker instantaneous mechanism comprises a support, a moving iron core and an elastic piece. The support is used for being connected with a circuit breaker shell and being fixed relative to the shell. A first connecting part is arranged on the support, and a second connecting part is arranged on the moving iron core. The moving iron core is rotationally connected with the support through cooperation of the first connecting part and the second connecting part. A knocking rod and a connecting piece are arranged on the moving iron core and are spaced along the rotation axis of the moving iron core. The knocking rod is used for knocking an operating mechanism. The elastic piece is arranged on the side of the support away from the operating mechanism. The elastic piece is connected with the connecting piece and the support at two ends. The elastic piece and the knocking rod are independent of each other. In an instantaneous calibration process, when the gap between the knocking rod and the operating mechanism is adjusted to adjust the instantaneous multiple, the elastic force of the elastic piece does not change, the instantaneous multiple is easy to adjust, the difficulty of the instantaneous calibration is reduced, and the adjustment efficiency of the instantaneous calibration is improved.

Description

Technical Field

[0001] This application relates to the field of circuit breaker technology, and in particular to a circuit breaker instantaneous mechanism and a circuit breaker. Background Technology

[0002] A momentary tripping mechanism primarily refers to a tripping device in a circuit breaker used for rapid response to abnormal currents, achieving rapid tripping through electromagnetic force or thermal expansion. A momentary tripping mechanism typically consists of a moving iron core and an Ampere spring. The moving iron core has a striking lever for striking the traction rod of the operating mechanism, and the Ampere spring is connected to the side of the striking lever opposite to the traction rod. The greater the elastic force of the Ampere spring acting on the striking lever, the higher the momentary tripping multiple of the mechanism.

[0003] The production of circuit breakers includes an instantaneous calibration process. This process primarily adjusts the instantaneous multiple of the instantaneous mechanism to ensure that, in the event of an abnormal current, the mechanism can quickly strike the traction rod, causing the operating mechanism to trip and rapidly disconnect the circuit, thus achieving effective circuit protection.

[0004] In related technologies, the instantaneous multiplier is typically adjusted by changing the gap between the striking rod and the traction rod. When it's necessary to increase the instantaneous multiplier, the gap is widened, but the spring force of the Abe spring decreases. Conversely, when it's necessary to decrease the instantaneous multiplier, the gap is narrowed, but the spring force of the Abe spring increases. In other words, during the instantaneous calibration process, adjusting the instantaneous multiplier causes the spring force of the Abe spring to change in opposite directions, making instantaneous calibration difficult and resulting in low adjustment efficiency. Utility Model Content

[0005] This application provides a circuit breaker instantaneous mechanism and circuit breaker, which to a certain extent avoids the ample spring from changing in the opposite direction when adjusting the instantaneous multiple, thereby improving the adjustment efficiency of the instantaneous calibration process.

[0006] In a first aspect, this application provides a circuit breaker instantaneous mechanism, including a bracket, a moving iron core, and an elastic element. The bracket is used to connect to and be fixed relative to the circuit breaker housing; a first connecting part is provided on the bracket, and a second connecting part is provided on the moving iron core, the moving iron core being rotatably connected to the bracket through the cooperation of the first and second connecting parts. A striking rod and a connecting member are provided on the moving iron core, the striking rod and the connecting member being spaced apart in a direction parallel to the rotation axis of the moving iron core; the striking rod is used to strike an operating mechanism located on the side of the moving iron core opposite to the bracket; the elastic element is located on the side of the bracket opposite to the operating mechanism, and both ends of the elastic element are connected to the connecting member and the bracket, respectively.

[0007] The circuit breaker instantaneous mechanism provided in this application comprises a bracket, a moving iron core, and an elastic element. The moving iron core is mounted within the circuit breaker housing via the bracket and can rotate relative to the bracket within the housing. A striking rod and a connecting member are provided on the moving iron core, spaced apart in a direction parallel to the rotation axis of the moving iron core. The striking rod strikes the operating mechanism located on the side of the moving iron core opposite to the bracket, causing the operating mechanism to trip in the event of an abnormal current, quickly disconnecting the circuit and achieving effective circuit protection. The elastic element is located on the side of the bracket opposite to the operating mechanism, with both ends connected to the connecting member and the bracket respectively. In other words, the elastic element is mounted on the connecting member and not on the striking rod.

[0008] Because the connecting parts and the striking rod are spaced apart, the elastic element and the striking rod are also spaced apart. The elastic element and the striking rod are independent and do not contact each other. Therefore, during the instantaneous calibration process, when adjusting the gap between the striking rod and the operating mechanism to adjust the instantaneous multiplier, the elastic force of the elastic element will not change. In other words, adjusting the gap between the striking rod and the operating mechanism will not cause a change in the elastic element. With this setup, when adjusting the instantaneous multiplier, the gap between the striking rod and the operating mechanism is an adjustable variable of the instantaneous multiplier, while the elastic force of the elastic element is fixed relative to the gap adjustment. The elastic force of the elastic element will not change during the gap adjustment process. Therefore, during instantaneous calibration, the elastic force of the elastic element will not interfere with the adjustment of the instantaneous multiplier, making the instantaneous multiplier easier to adjust, thereby reducing the difficulty of instantaneous calibration, making instantaneous calibration easier to adjust and implement, improving the adjustment efficiency of instantaneous calibration, and also improving the production efficiency of the circuit breaker with the instantaneous mechanism of this application.

[0009] In one possible design, the club includes a club body and a club head. One end of the club body is connected to the moving iron core, and the club head is connected to the other end of the club body and extends toward the side where the operating mechanism is located. The club head is used to strike the operating mechanism.

[0010] The above scheme configures the striking lever as a connected lever body and lever head. The lever head is connected to the moving iron core via the lever body, and extends towards the side where the operating mechanism is located. The lever head is used to strike the operating mechanism; that is, when an abnormal current occurs, the moving iron core rotates towards the side closest to the operating mechanism, causing the lever head to strike the operating mechanism, thus tripping the operating mechanism and disconnecting the circuit. With this configuration, during the instantaneous verification process, the gap between the lever head and the operating mechanism can be adjusted by adjusting the angle between the lever head and the lever body, thereby achieving adjustment of the instantaneous multiplier. The structure is simple and facilitates adjustment of the instantaneous multiplier.

[0011] In one possible design, the other end of the rod body is bent toward the side where the operating mechanism is located to form the rod head.

[0012] The above solution involves bending the end of the rod body away from the moving iron core towards the side closest to the operating mechanism to form the rod head. In other words, the rod body and rod head are integrally formed, resulting in a single, integrated structure with good overall integrity and high structural strength. Furthermore, this integrated structure also improves the stability and reliability of the rod head striking the operating mechanism.

[0013] In one possible design, the rod head is tilted away from the rod body in the direction from the elastic element to the operating mechanism.

[0014] With the above design, the clubhead extends towards the side where the operating mechanism is located. Furthermore, along the direction from the elastic element to the operating mechanism, the clubhead is also tilted away from the main body of the club. This results in an obtuse angle between the clubhead and the main body. On one hand, this provides a larger angle adjustment range for the clubhead, facilitating instantaneous multiplier adjustments. On the other hand, during the striking of the operating mechanism, it avoids stress concentration at the connection between the clubhead and the main body to a certain extent, improving the structural strength of the club and extending its service life.

[0015] In one possible design, the connection between the shaft body and the shaft head is rounded.

[0016] By using the above-described design, the connection between the shaft body and the shaft head is rounded, which to some extent prevents stress concentration at the connection point during the striking mechanism, thus improving the structural strength of the striking shaft and extending its service life. Furthermore, it prevents interference with other surrounding components, ensuring higher safety in use.

[0017] In one possible design, the connector includes a connecting rod, one end of which is connected to the moving iron core, and the end of the connecting rod facing away from the moving iron core has a connecting hole. The end of the elastic element facing the connector is detachably connected to the connecting hole.

[0018] The above solution uses a connecting rod as the connector, resulting in a simple structure that is easy to manufacture. A connecting hole is made at the end of the connecting rod facing away from the moving iron core. One end of the elastic element is detachably connected to the connecting hole, facilitating connection and providing high load-bearing capacity for the spring. Furthermore, when either the elastic element or the moving iron core is damaged and needs replacement, only the elastic element needs to be removed from the connecting hole to replace the damaged component. Compared to replacing the entire spring and moving iron core, this saves on replacement and maintenance costs.

[0019] In one possible design, the end of the connecting rod away from the moving iron core is bent in the direction away from the operating mechanism to form a connector, and a connecting hole is opened on the connector.

[0020] The above solution involves bending the end of the connecting rod away from the moving iron core towards the direction away from the operating mechanism to form a connector. The connecting rod and the connector are integrally formed, resulting in a one-piece structure with good overall integrity, high structural strength, and good load-bearing capacity for the elastic component. Furthermore, the connector extends towards the direction away from the operating mechanism, providing ample installation space for the elastic component and facilitating its assembly.

[0021] In one possible design, the first connecting part includes a connecting through hole, and the second connecting part includes a connecting post that passes through the connecting through hole and is rotatable relative to the connecting through hole.

[0022] The above scheme involves setting a connecting hole on the bracket and a connecting post on the moving iron core. The connecting post passes through the connecting hole and can rotate relative to the connecting hole. That is, the connecting post passing through the connecting hole is in clearance fit with the connecting hole, thereby realizing the rotational connection of the moving iron core on the bracket. This allows the moving iron core to rotate towards the direction closer to the operating mechanism, driving the trigger lever to strike the operating mechanism. This enables the operating mechanism to trip when there is an abnormal current, achieving rapid circuit breaking. Furthermore, the moving iron core can rotate away from the operating mechanism to reset, facilitating subsequent use. The structure is simple, easy to manufacture, and rotates smoothly.

[0023] In one possible design, there are two connecting vias, which are spaced apart on the bracket in a direction parallel to the rotation axis of the moving iron core. There are also two connecting posts, which are connected to the connecting vias one by one.

[0024] The above scheme involves setting two connection holes on the bracket, spaced apart, with their arrangement parallel to the rotation axis of the moving iron core. Two connecting posts are also installed on the moving iron core, each rotatably connected to a corresponding connection hole. This allows the moving iron core and the bracket to be rotatably connected through the cooperation of two sets of connection holes and connecting posts, improving the connection strength and stability between them. It also makes the rotation of the moving iron core relative to the bracket more stable and smooth, contributing to improved tripping efficiency of the circuit breaker's instantaneous mechanism.

[0025] In one possible design, a first limiting part is provided on the bracket, and a second limiting part is provided on the moving iron core. The first limiting part and the second limiting part cooperate to limit the moving iron core.

[0026] Through the above scheme, the first limiting part on the bracket and the second limiting part on the moving iron core cooperate to prevent the elastic element from overstretching the moving iron core, which would cause the gap between the moving iron core and the operating mechanism to be too large and affect the instantaneous multiplication factor. On the other hand, after the operating mechanism is disengaged, it is easy for the moving iron core to move in the direction away from the operating mechanism to reset, which plays a good limiting role for the moving iron core and improves the convenience and effectiveness of use.

[0027] In one possible design, the first limiting part includes a limiting groove with the opening of the limiting groove facing at least the side where the operating mechanism is located, and the second limiting part includes a limiting protrusion that abuts against the thin wall of the limiting groove on the side away from the operating mechanism.

[0028] The above solution involves setting a limiting wall on the bracket and a limiting protrusion on the moving iron core. The limiting protrusion abuts against the groove wall on the side of the limiting groove opposite to the operating mechanism. This design is simple, easy to manufacture, and provides good limiting effect. It also facilitates the movement of the moving iron core towards the side of the operating mechanism when there is an abnormal current, thereby causing the trigger lever to strike the operating mechanism and disengage it. Furthermore, it effectively limits the reset of the moving iron core, preventing excessive movement during reset.

[0029] In one possible design, there are two first limiting parts, which are spaced apart on the moving iron core in a direction parallel to the rotation axis of the moving iron core. There are also two second limiting parts, with one first limiting part and one second limiting part corresponding to each other.

[0030] The above scheme involves setting two first limiting parts on the support, spaced apart, with their arrangement parallel to the rotation axis of the moving iron core. Two second limiting parts are then set on the moving iron core, with one first limiting part corresponding to one second limiting part. This provides two sets of mutually cooperating limiting parts between the moving iron core and the support, improving the limiting effect on the moving iron core.

[0031] Secondly, this application provides a circuit breaker, including the instantaneous circuit breaker mechanism as described above.

[0032] The beneficial effects of the circuit breakers provided in the second aspect and the various possible designs of the second aspect can be found in the first aspect and the various possible implementations of the first aspect, and will not be repeated here. Attached Figure Description

[0033] Figure 1 This is an isometric view of a partial structure of a circuit breaker according to an embodiment of this application, including the instantaneous mechanism and the traction rod of the operating mechanism of the circuit breaker.

[0034] Figure 2 for Figure 1 Side view.

[0035] Figure 3 This is a schematic diagram of the structure of the moving iron core and the bracket assembled together in an embodiment of the instantaneous mechanism of the circuit breaker described in this application.

[0036] Figure 4 This is an isometric view of the bracket of the instantaneous mechanism of the circuit breaker according to an embodiment of this application.

[0037] Figure 5 This is an isometric view of the moving iron core of the instantaneous mechanism of the circuit breaker according to an embodiment of this application.

[0038] Explanation of reference numerals in the attached drawings: 10. Instantaneous mechanism of circuit breaker; 1. Bracket; 11. First connecting part; 12. First limiting part; 13. Assembly hole; 14. First mounting hole; 2. Moving iron core; 21. Second connecting part; 22. Second limiting part; 3. Elastic element; 4. Striking rod; 41. Rod body; 42. Rod head; 5. Connecting part; 51. Connecting head; 52. Connecting hole; 6. Gap; 7. Mounting seat; 71. Second mounting hole; 8. Fastener; 20. Operating mechanism; 201. Traction rod. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0041] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0042] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists, A and B exist simultaneously, or B exists. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0043] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the instantaneous mechanism of the circuit breaker or the specific structure of the circuit breaker in this application. For example, in the description of this application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0044] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0045] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).

[0046] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection. A physical connection can be a fixed connection, such as a connection secured by screws, bolts, or other spacers; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0047] A momentary tripping mechanism primarily refers to a tripping device in a circuit breaker used for rapid response to abnormal currents, achieving rapid tripping through electromagnetic force or thermal expansion. A momentary tripping mechanism typically consists of a moving iron core and an Ampere spring. The moving iron core has a striking lever for striking the traction rod of the operating mechanism, and the Ampere spring is connected to the side of the striking lever opposite to the traction rod. The greater the elastic force of the Ampere spring acting on the striking lever, the higher the momentary tripping multiple of the mechanism.

[0048] The production of circuit breakers includes an instantaneous calibration process. This process primarily adjusts the instantaneous multiple of the instantaneous mechanism to ensure that, in the event of an abnormal current, the mechanism can quickly strike the traction rod, causing the operating mechanism to trip and rapidly disconnect the circuit, thus achieving effective circuit protection.

[0049] In related technologies, the instantaneous multiplier is typically adjusted by changing the gap between the striking rod and the traction rod. When it's necessary to increase the instantaneous multiplier, the gap is widened, but the spring force of the Abe spring decreases. Conversely, when it's necessary to decrease the instantaneous multiplier, the gap is narrowed, but the spring force of the Abe spring increases. In other words, during the instantaneous calibration process, adjusting the instantaneous multiplier causes the spring force of the Abe spring to change in opposite directions, making instantaneous calibration difficult and resulting in low adjustment efficiency.

[0050] Based on this, this embodiment provides a circuit breaker instantaneous mechanism 10 and a circuit breaker. It includes a bracket 1, a moving iron core 2, and an elastic element 3. A striking rod 4 and a connecting member 5 are mounted on the moving iron core 2. The striking rod 4 and the connecting member 5 are positioned along the rotation axis of the moving iron core 2 (see reference). Figure 1 , Figures 3 to 5 The elastic element 3 is spaced apart in a direction parallel to the X-axis (as shown). The elastic element 3 is connected to the side of the connecting member 5 away from the operating mechanism 20, so the elastic element 3 and the striking rod 4 are also spaced apart. That is, the elastic element 3 and the striking rod 4 are independent of each other and do not contact each other. Therefore, in the instantaneous calibration process, when adjusting the instantaneous multiplier by adjusting the gap 6 between the striking rod 4 and the operating mechanism 20, the elastic force of the elastic element 3 will not change. Thus, when adjusting the instantaneous multiplier, the gap 6 between the striking rod 4 and the operating mechanism 20 is an adjustable variable of the instantaneous multiplier, while the elastic force of the elastic element 3 is fixed relative to the adjustment of the gap 6. The elastic force of the elastic element 3 will not change during the adjustment of the gap 6. Therefore, the elastic force of the elastic element 3 will not interfere with the adjustment of the instantaneous multiplier during instantaneous calibration, making the instantaneous multiplier easier to adjust, thereby reducing the difficulty of instantaneous calibration, making instantaneous calibration easier to adjust and implement, and improving the adjustment efficiency of instantaneous calibration.

[0051] The following detailed description, with reference to the accompanying drawings and specific embodiments, illustrates a circuit breaker instantaneous mechanism 10 and a circuit breaker provided in this embodiment.

[0052] refer to Figures 1 to 3 As shown, this embodiment provides a circuit breaker, which includes a housing (not shown), an instantaneous mechanism, an operating mechanism 20, a contact system (not shown), and an arc extinguishing structure (not shown).

[0053] The instantaneous mechanism, operating mechanism 20, contact system, arc extinguishing structure, and rotating shaft are all housed within the housing.

[0054] The rotating shaft is rotatably connected to the housing. The operating mechanism 20 is connected to the rotating shaft and is used to drive the rotating shaft to the closed or open position. The operating mechanism 20 is mainly designed to facilitate manual operation, enabling the circuit breaker to be energized when closed or de-energized when open.

[0055] The arc-extinguishing structure is located on one side of the rotating shaft, and the arc-extinguishing structure has an arc-extinguishing cavity. An avoidance opening is provided on the side of the arc-extinguishing cavity facing the rotating shaft.

[0056] The contact system includes a stationary contact and a moving contact. The stationary contact is located inside the arc-extinguishing cavity. The moving contact is connected to and fixed relative to the rotating shaft, and can extend into the arc-extinguishing cavity from the clearance opening of the arc-extinguishing cavity.

[0057] In practical use, the operating mechanism 20 can drive the rotating shaft to rotate, which in turn drives the moving contact to rotate. Specifically, driven by the rotating shaft, the moving contact can rotate relative to the housing towards the stationary contact, so that the moving contact makes contact with the stationary contact, thereby closing the circuit breaker and realizing electrical conduction. The moving contact can also rotate relative to the housing away from the stationary contact, so that the moving contact disengages from the stationary contact, thereby opening the circuit breaker and disconnecting the power, thus protecting the circuit and electrical equipment.

[0058] The instantaneous mechanism can be arranged inside the housing, for example, on the side of the moving contact away from the arc-extinguishing cavity, and close to the operating mechanism 20. When there is an abnormal current, the striking lever 4 of the instantaneous mechanism can move towards the operating mechanism 20 to strike the operating mechanism 20, causing the operating mechanism 20 to trip. The tripping of the operating mechanism 20 causes the moving contact to quickly separate from the stationary contact, the circuit breaker to trip and disconnect the power, and protect the circuit and electrical equipment.

[0059] refer to Figures 1 to 3 As shown, this embodiment provides a circuit breaker instantaneous mechanism (hereinafter referred to as instantaneous mechanism) 10, which includes a bracket 1, a moving iron core 2, and an elastic element 3.

[0060] Continue to refer to Figures 1 to 3 As shown, specifically, bracket 1 is used to connect to and be fixed relative to the circuit breaker housing. A first connecting part 11 is provided on bracket 1, and a second connecting part 21 is provided on the moving iron core 2. The moving iron core 2 is rotatably connected to bracket 1 through the cooperation of the first connecting part 11 and the second connecting part 21. A striking rod 4 and a connecting piece 5 are provided on the moving iron core 2. The striking rod 4 and the connecting piece 5 are aligned along the rotation axis of the moving iron core 2 (see reference). Figure 1 , Figures 3 to 5 The levers 4 and 5 are spaced apart in a direction parallel to the X-axis (as shown). The lever 4 is used to strike the operating mechanism 20 located on the side of the moving iron core 2 away from the support 1. Specifically, the lever 4 is used to strike the traction rod 201 of the operating mechanism 20. The elastic element 3 is located on the side of the support 1 away from the operating mechanism 20, and both ends of the elastic element 3 are connected to the connecting element 5 and the support 1, respectively. That is, one end of the elastic element 3 is connected to the connecting element 5, and the other end of the elastic element 3 is connected to the support 1.

[0061] In some implementations, the bracket 1 can be connected to the housing via the mounting base 7.

[0062] For example, refer to Figure 1 , Figure 2 and Figure 4 As shown, the bracket 1 is provided with a first mounting hole 14, and the mounting base 7 is provided with a first clearance hole (not shown) at the position corresponding to the first mounting hole 14. The bracket 1 and the mounting base 7 are connected together by fasteners 8, such as rivets, that pass through the first mounting hole 14 and the first clearance hole.

[0063] refer to Figure 2 and Figure 3 As shown, the mounting base 7 has a second mounting hole 71, and the housing has a second clearance hole (not shown) that matches the second mounting hole 71. The mounting base 7, which is connected to the bracket 1, is connected to the housing through a fastening fitting that passes through the second mounting hole 71 and the second clearance hole, thereby achieving the connection of the bracket 1 to the housing through the mounting base 7.

[0064] In some other implementations, the bracket 1 can be directly connected to the housing.

[0065] The instantaneous mechanism 10 also includes a stationary iron core (not shown). The stationary iron core can be arranged, for example, on the side of the moving iron core 2 opposite to the operating mechanism 20. The stationary iron core and the traction rod 201 of the operating structure are respectively located on opposite sides of the rotation axis of the moving iron core 2. The stationary iron core and the side of the moving iron core 2 opposite to the traction rod 201 are arranged opposite each other. For example, the stationary iron core can be arranged within the mounting base 7. The stationary iron core can be connected to the bracket 1 or the housing to fix the stationary iron core within the housing.

[0066] After the circuit breaker is energized, the stationary iron core and the moving iron core 2 generate a magnetic attraction force, and there is a gap 6 between the trip lever 4 and the traction lever 201 of the operating mechanism 20. (Reference) Figure 2 As shown. When an abnormal current passes through, the magnetic force between the stationary iron core and the moving iron core 2 increases, attracting the moving iron core 2 to the stationary iron core. This causes the moving iron core 2 to rotate towards the operating mechanism 20. The moving iron core 2 then moves the trip lever 4 towards the side where the operating mechanism 20 is located, causing the trip lever 4 to strike the traction rod 201 of the operating mechanism 20, thus disengaging the operating mechanism and tripping the circuit breaker.

[0067] The gap 6 between the striking rod 4 and the traction rod 201 is related to the instantaneous multiple of the instantaneous mechanism, reflecting the circuit breaker's sensitivity to abnormal current. During the instantaneous calibration process, when fine-tuning of the instantaneous multiple is required, the gap 6 between the striking rod 4 and the traction rod 201 can be adjusted to achieve the appropriate instantaneous multiple.

[0068] Specifically, when the instantaneous multiplier needs to be increased, the gap 6 will be increased slightly. When premature jump occurs and the instantaneous multiplier needs to be decreased, the gap 6 will be decreased slightly, thus achieving fine-tuning of the instantaneous multiplier.

[0069] In practice, the striking rod 4 can be a metal striking rod made of materials such as iron or aluminum, which is easy to plastically deform and has good ductility. Therefore, the gap 6 can be adjusted by adjusting the angle of the striking rod 4 toward the end of the traction rod 201.

[0070] It should be noted that the gap 6 between the striking rod 4 and the traction rod 201 can be specifically understood as the gap at the minimum distance between the striking rod 4 and the traction rod 201.

[0071] Since the striking rod 4 and connecting piece 5 on the moving iron core 2 are spaced apart in a direction parallel to the rotation axis of the moving iron core 2, the striking rod 4 and connecting piece 5 do not contact each other and are independent of each other. Furthermore, since the elastic element 3 is located on the side of the support 1 away from the operating mechanism 20, and both ends of the elastic element 3 are connected to the connecting piece 5 and the support 1 respectively, the elastic element 3 and the operating mechanism 20 are located on opposite sides of the support 1. The elastic element 3 and striking rod 4 are also spaced apart in a direction parallel to the rotation axis of the moving iron core 2, and the elastic element 3 and striking rod 4 will not contact each other; they are also independent of each other.

[0072] Therefore, during the production process, when it is necessary to adjust the instantaneous multiplier of the instantaneous mechanism in the instantaneous verification process, the production personnel can adjust the gap 6 between the striking rod 4 and the traction rod 201 to achieve a fine adjustment of the instantaneous multiplier.

[0073] Furthermore, since the elastic element 3 and the striking rod 4 do not contact each other and are independent of each other, the elastic force of the elastic element 3 will not change when adjusting the gap 6 between the striking rod 4 and the traction rod 201. Compared with the related technology, where the ambe spring is connected to the side of the striking rod 4 away from the traction rod 201, and the adjustment of the instantaneous multiplier will cause the elastic force of the ambe spring to change in the opposite direction, the elastic element 3 will not interfere with the adjustment of the instantaneous multiplier, making the instantaneous multiplier easy to adjust, thereby reducing the difficulty of instantaneous verification, making instantaneous verification easy to adjust and implement, improving the adjustment efficiency of instantaneous verification, and also improving the production efficiency of the circuit breaker in which the instantaneous mechanism 10 of the circuit breaker of this application is located.

[0074] In practice, the elastic element 3 can be, for example, a spring.

[0075] The instantaneous mechanism provided in this embodiment comprises a bracket 1, a moving iron core 2, and an elastic element 3. The moving iron core 2 is mounted inside the circuit breaker housing via the bracket 1 and can rotate relative to the bracket 1 within the housing. A striking rod 4 and a connecting piece 5 are provided on the moving iron core 2, and the striking rod 4 and the connecting piece 5 are spaced apart in a direction parallel to the rotation axis of the moving iron core 2. The striking rod 4 is used to strike the operating mechanism 20 located on the side of the moving iron core 2 opposite to the bracket 1, causing the operating mechanism 20 to trip in the event of an abnormal current, quickly disconnecting the circuit and achieving effective circuit protection. The elastic element 3 is located on the side of the bracket 1 opposite to the operating mechanism 20, with both ends of the elastic element 3 connected to the connecting piece 5 and the bracket 1 respectively. That is, the elastic element 3 is mounted on the connecting piece 5 and is not mounted on the striking rod 4.

[0076] Because the connecting piece 5 and the striking rod 4 are spaced apart, the elastic element 3 and the striking rod 4 are also spaced apart. The elastic element 3 and the striking rod 4 are independent of each other and do not contact each other. Therefore, in the instantaneous verification process, when the instantaneous multiplier is adjusted by adjusting the gap 6 between the striking rod 4 and the operating mechanism 20, the elastic force of the elastic element 3 will not change. In other words, adjusting the gap 6 between the striking rod 4 and the operating mechanism 20 will not cause a change in the elastic element 3. With this setting, when adjusting the instantaneous multiplier, the gap 6 between the striking rod 4 and the operating mechanism 20 is an adjustable variable of the instantaneous multiplier. The elastic force of the elastic element 3 is fixed relative to the adjustment of the gap 6. The elastic force of the elastic element 3 will not change during the adjustment of the gap 6. Therefore, the elastic force of the elastic element 3 will not interfere with the adjustment of the instantaneous multiplier during instantaneous verification, making the instantaneous multiplier easy to adjust, thereby reducing the difficulty of instantaneous verification, making instantaneous verification easy to adjust and implement, improving the adjustment efficiency of instantaneous verification, and also improving the production efficiency of the circuit breaker in which the instantaneous mechanism 10 of the circuit breaker in this embodiment is located.

[0077] refer to Figure 2 , Figure 3 and Figure 5 As shown, in some embodiments, the striking lever 4 includes a lever body 41 and a lever head 42. One end of the lever body 41 is connected to the moving iron core 2, and the lever head 42 is connected to the other end of the lever body 41 and extends toward the side where the operating mechanism 20 is located. The lever head 42 is used to strike the operating mechanism 20.

[0078] The minimum distance between the pole head 42 and the traction rod 201 is the gap 6 between the hitting pole 4 and the traction rod 201.

[0079] The striking lever 4 is configured as a lever body 41 and a lever head 42 connected together. The lever head 42 is connected to the moving iron core 2 via the lever body 41, and extends towards the side where the operating mechanism 20 is located. The lever head 42 is used to strike the traction rod 201. That is, when there is an abnormal current, the moving iron core 2 rotates towards the side closer to the operating mechanism 20, causing the lever head 42 to strike the traction rod 201, causing the operating mechanism 20 to trip and disconnect the circuit. With this configuration, during the instantaneous verification process, the gap 6 between the lever head 42 and the traction rod 201 can be adjusted by adjusting the included angle between the lever head 42 and the lever body 41, thereby achieving the adjustment of the instantaneous multiplier. The structure is simple and facilitates the adjustment of the instantaneous multiplier.

[0080] In practice, the joint between the pole head 42 and the pole body 41 is used as the pivot point. By moving the pole head 42 toward or away from the pole body 41, the angle of the pole head 42 relative to the pole body 41 can be adjusted, thereby adjusting the gap 6 between the pole head 42 and the traction rod 201, achieving instantaneous adjustment of the multiple, which is convenient.

[0081] In some implementations, the operator can manually hold the rod head 42 to adjust the angle of the rod head 42 relative to the rod body 41. Of course, the operator can also use tools such as tweezers to clamp the rod head 42 to adjust the angle of the rod head 42 relative to the rod body 41.

[0082] In some implementations, the rod body 41 can be integrally formed with the moving iron core 2, resulting in good integrity and high structural strength. Of course, in other implementations, the rod body 41 and the moving iron core 2 can be welded together.

[0083] In some embodiments, the other end of the rod body 41 is bent toward the side where the operating mechanism 20 is located to form a rod head 42.

[0084] The end of the rod body 41 facing away from the moving iron core 2 is bent towards the side near the operating mechanism 20 to form the rod head 42. In other words, the rod body 41 and the rod head 42 are integrally formed, forming a single structure with good integrity and high structural strength. Furthermore, making the rod body 41 and the rod head 42 a single structure also improves the stability and reliability of the rod head 42 striking the operating mechanism 20.

[0085] In some other implementations, the rod head 42 and the rod body 41 can be welded together, for example.

[0086] refer to Figure 2 and Figure 5 As shown, in some embodiments, the rod head 42 is inclined away from the rod body 41 in the direction along the elastic member 3 to the operating mechanism 20.

[0087] In other words, while the club head 42 extends towards the side where the operating mechanism 20 is located, it is also inclined away from the main body 41 along the direction from the elastic member 3 to the operating mechanism 20. This makes the angle between the club head 42 and the main body 41 an obtuse angle. On the one hand, this provides a larger angle adjustment space for the club head 42, facilitating instantaneous multiplier adjustments. On the other hand, during the striking of the operating mechanism 20, it avoids stress concentration at the connection between the club head 42 and the main body 41 to a certain extent, improving the structural strength of the striking stick 4 and extending its service life to some extent.

[0088] It should be noted that the tilt angle of the pole head 42 relative to the pole body 41 is not subject to much restriction. Considering the performance of the circuit breaker, as long as the gap 6 between the pole head 42 and the traction rod 201 corresponding to the tilt angle of the pole head 42 relative to the pole body 41 meets the instantaneous multiple, it is acceptable.

[0089] refer to Figure 2 and Figure 5 As shown, in some embodiments, the connection between the rod body 41 and the rod head 42 is rounded.

[0090] By rounding the connection between the rod body 41 and the rod head 42, stress concentration at the connection point is avoided to some extent during the striking mechanism 20, thus improving the structural strength of the striking rod 4 and extending its service life. Furthermore, it prevents the striking rod 4 from interfering with and damaging other surrounding components, ensuring higher safety in use.

[0091] refer to Figure 3 and Figure 5 As shown, in some embodiments, the connector 5 includes a connecting rod, one end of which is connected to the moving iron core 2, and the end of the connecting rod away from the moving iron core 2 has a connecting hole 52. The end of the elastic member 3 facing the connector 5 is detachably connected to the connecting hole 52.

[0092] The connecting member 5 is designed as a connecting rod, which is simple in structure and easy to manufacture. Furthermore, a connecting hole 52 is provided at the end of the connecting rod facing away from the moving iron core 2. One end of the elastic member 3 is detachably connected to the connecting hole 52, making connection convenient and providing high load-bearing capacity for the spring. Moreover, when either the elastic member 3 or the moving iron core 2 is damaged and needs replacement, only the elastic member 3 needs to be removed from the connecting hole 52 to replace the damaged one. Compared to replacing the spring and the moving iron core 2 as a whole, this saves on replacement and maintenance costs.

[0093] refer to Figure 4 As shown, the bracket 1 has an assembly hole 13 on the side facing away from the moving iron core 2. The end of the elastic member 3 facing away from the connecting member 5 is detachably connected to the assembly hole 13.

[0094] Continue to refer to Figure 4 As shown, the assembly hole 13 can be, for example, an inverted U-shaped hole with a notch, to facilitate the connection of the elastic element 3. Of course, the assembly hole 13 can also be, for example, a circular hole, a rectangular hole, etc.

[0095] In a specific implementation, for example, multiple mounting holes 13 can be spaced apart on the bracket 1. For example, refer to... Figure 4 As shown, the bracket 1 has two mounting holes 13, which further facilitates the connection of the elastic element 3 on the bracket 1.

[0096] In some implementations, the connecting rod can be integrally formed with the moving iron core 2, resulting in good integrity and high structural strength. Of course, in other implementations, the connecting rod and the moving iron core 2 can be welded together.

[0097] refer to Figure 3 and Figure 5 As shown, in some embodiments, the end of the connecting rod away from the moving iron core 2 is bent in the direction away from the operating mechanism 20 to form a connector 51, and a connecting hole 52 is formed on the connector 51.

[0098] One end of the connecting rod away from the moving iron core 2 is bent towards the direction away from the operating mechanism 20 to form a connector 51. The connecting rod and the connector 51 are integrally formed, forming a single structure with good integrity, high structural strength, and good load-bearing capacity for the elastic element 3. Furthermore, the connector 51 extends towards the direction away from the operating mechanism 20, providing a larger installation space for the elastic element 3 and facilitating its assembly.

[0099] In other embodiments, the connector 51 may be welded to the end of the connecting rod away from the moving iron core 2.

[0100] refer to Figures 3 to 5 As shown, in some embodiments, the first connecting part 11 includes a connecting through hole, and the second connecting part 21 includes a connecting post. The connecting post passes through the connecting through hole and can rotate relative to the connecting through hole. The structure is simple, easy to manufacture, and convenient to assemble.

[0101] By setting a connecting hole on the bracket 1 and a connecting post on the moving iron core 2, the connecting post passes through the connecting hole and can rotate relative to the connecting hole. That is, the connecting post passing through the connecting hole is in clearance fit with the connecting hole, thereby realizing the rotational connection of the moving iron core 2 on the bracket 1. This allows the moving iron core 2 to rotate toward the direction closer to the operating mechanism 20, driving the striking rod 4 to strike the operating mechanism 20, so that the operating mechanism 20 can trip when there is an abnormal current, realizing rapid circuit breaking. Furthermore, the moving iron core 2 can rotate away from the operating mechanism 20 to reset, which is convenient for subsequent use. The structure is simple, easy to manufacture, and the rotation is smooth.

[0102] In other embodiments, the first connecting part 11 on the bracket 1 may be a connecting post, and the second connecting part 21 on the moving iron core 2 may be a connecting through hole.

[0103] refer to Figure 4 and Figure 5 As shown, in some embodiments, there are two connecting through holes, which are spaced apart on the bracket 1 in a direction parallel to the rotation axis of the moving iron core 2. There are two connecting posts, which are connected to the connecting through holes one by one.

[0104] In other words, two connecting holes are provided on the bracket 1, spaced apart, and their arrangement direction is parallel to the rotation axis of the moving iron core 2. Two connecting posts are provided on the moving iron core 2, with each post rotatably connected to a connecting hole. In this way, the moving iron core 2 and the bracket 1 are rotatably connected together through the cooperation of two sets of connecting holes and connecting posts, which improves the connection strength and stability between the moving iron core 2 and the bracket 1, and makes the rotation of the moving iron core 2 relative to the bracket 1 more stable and smooth, thus helping to improve the tripping efficiency of the circuit breaker where the instantaneous mechanism 10 of the circuit breaker is located.

[0105] For specific implementation, refer to Figure 4 As shown, one of the two connecting vias can be a circular hole, and the other of the two connecting vias can be a U-shaped hole with the opening facing upwards, which facilitates assembly.

[0106] refer to Figures 3 to 5 As shown, in some embodiments, the bracket 1 is provided with a first limiting part 12, and the moving iron core 2 is provided with a second limiting part 22. The first limiting part 12 and the second limiting part 22 cooperate to limit the moving iron core 2.

[0107] The first limiting part 12 on the bracket 1 and the second limiting part 22 on the moving iron core 2 cooperate to prevent the elastic element 3 from overstretching the moving iron core 2, thus avoiding an excessive gap 6 between the moving iron core 2 and the operating mechanism 20, which would affect the instantaneous multiplication factor. On the other hand, after the operating mechanism 20 is disengaged, it facilitates the moving iron core 2 to move away from the operating mechanism 20 to its reset position, effectively limiting the moving iron core 2 and improving the convenience and effectiveness of use.

[0108] refer to Figure 4 and Figure 5 As shown, in some embodiments, the first limiting part 12 includes a limiting groove, the opening of which faces at least the side where the operating mechanism 20 is located, and the second limiting part 22 includes a limiting protrusion, which abuts against the thin wall of the limiting groove on the side away from the operating mechanism 20.

[0109] By setting a limiting wall on the bracket 1 and a limiting protrusion on the moving iron core 2, the limiting protrusion abuts against the groove wall on the side of the limiting groove opposite to the operating mechanism 20. The structure is simple, easy to manufacture, and has a good limiting effect. It also facilitates the movement of the moving iron core 2 toward the side of the operating mechanism 20 when there is an abnormal current, thereby driving the striking rod 4 to strike the operating mechanism 20 and disengage it. Furthermore, it effectively limits the reset of the moving iron core 2, preventing excessive movement during reset.

[0110] For example, refer to Figure 4 As shown, on bracket 1, the limiting groove can be located above the connecting through hole. Correspondingly, on moving iron core 2, the limiting protrusion is located above the connecting post.

[0111] Furthermore, the limiting groove located above the U-shaped connecting through hole is connected to the U-shaped connecting through hole, which facilitates the assembly of the moving iron core 2 and the bracket 1.

[0112] refer to Figures 3 to 5 As shown, in some embodiments, there are two first limiting parts 12, which are spaced apart on the moving iron core 2 in a direction parallel to the rotation axis of the moving iron core 2. There are also two second limiting parts 22, with one first limiting part 12 and one second limiting part 22 correspondingly abutting against each other.

[0113] By providing two first limiting parts 12 on the support 1, with the two first limiting parts 12 spaced apart and arranged in a direction parallel to the rotation axis of the moving iron core 2, and providing two second limiting parts 22 on the moving iron core 2, with one first limiting part 12 corresponding to one second limiting part 22, two sets of mutually cooperating limiting parts are provided between the moving iron core 2 and the support 1, thereby improving the limiting effect on the moving iron core 2.

Claims

1. A circuit breaker instantaneous mechanism, characterized in that, Includes the support frame, moving iron core, and elastic components; The bracket is used to connect to the housing of the circuit breaker and is fixed relative to the housing; The bracket is provided with a first connecting part, and the moving iron core is provided with a second connecting part. The moving iron core is rotatably connected to the bracket through the cooperation of the first connecting part and the second connecting part. The moving iron core is provided with a striking rod and a connecting member. The striking rod and the connecting member are spaced apart in a direction parallel to the rotation axis of the moving iron core. The striking rod is used to strike the operating mechanism located on the side of the moving iron core away from the support. The elastic member is located on the side of the support away from the operating mechanism, and the two ends of the elastic member are respectively connected to the connecting member and the support.

2. The instantaneous mechanism of the circuit breaker according to claim 1, characterized in that, The club includes a club body and a club head; One end of the rod body is connected to the moving iron core, and the rod head is connected to the other end of the rod body and extends toward the side where the operating mechanism is located. The rod head is used to strike the operating mechanism.

3. The instantaneous mechanism of the circuit breaker according to claim 2, characterized in that, The other end of the rod body is bent toward the side where the operating mechanism is located to form the rod head; And / or, in the direction along the elastic member to the operating mechanism, the rod head is inclined away from the rod body; And / or, the connection between the rod body and the rod head is rounded.

4. The instantaneous mechanism of the circuit breaker according to claim 1, characterized in that, The connector includes a connecting rod, one end of which is connected to the moving iron core. The end of the connecting rod facing away from the moving iron core has a connecting hole, and the end of the elastic member facing the connector is detachably connected to the connecting hole.

5. The instantaneous mechanism of the circuit breaker according to claim 4, characterized in that, The end of the connecting rod that is away from the moving iron core is bent in a direction away from the operating mechanism to form a connector, and the connecting hole is opened on the connector.

6. The instantaneous mechanism of the circuit breaker according to claim 1, characterized in that, The first connecting part includes a connecting through hole, and the second connecting part includes a connecting post, which passes through the connecting through hole and is rotatable relative to the connecting through hole.

7. The instantaneous mechanism of the circuit breaker according to claim 6, characterized in that, There are two connecting through holes, which are spaced apart on the bracket in a direction parallel to the rotation axis of the moving iron core. There are two connecting posts, which are connected to the connecting through holes one by one.

8. The instantaneous mechanism of the circuit breaker according to any one of claims 1 to 7, characterized in that, The bracket is provided with a first limiting part, and the moving iron core is provided with a second limiting part. The first limiting part and the second limiting part cooperate to limit the moving iron core.

9. The instantaneous mechanism of the circuit breaker according to claim 8, characterized in that, The first limiting part includes a limiting groove, the opening of which faces at least the side where the operating mechanism is located; the second limiting part includes a limiting protrusion, which abuts against the groove wall on the side of the limiting groove away from the operating mechanism. And / or, there are two first limiting parts, which are spaced apart on the moving iron core in a direction parallel to the rotation axis of the moving iron core, and there are two second limiting parts, with one first limiting part and one second limiting part corresponding to each other.

10. A circuit breaker, characterized in that, Includes the instantaneous circuit breaker mechanism as described in any one of claims 1 to 9.

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