A trip unit and circuit breaker

Abstract

The application relates to a tripping assembly and a circuit breaker, and relates to the low-voltage electrical technology field. The tripping assembly comprises a coil framework, a top rod and a magnetic yoke, the magnetic yoke is arranged on the outer wall of the coil framework; the coil framework is internally provided with a first moving iron core and a second moving iron core arranged along a first direction, the top rod penetrates the second moving iron core and abuts against the end face of the first moving iron core; the top rod is provided with a first end and a second end, the first end can be stretched out from the port of the coil framework, and the second end abuts against the end face of the first moving iron core; a reset spring is sleeved on the first end, one end of the reset spring abuts against the port of the coil framework or the magnetic yoke, the other end of the reset spring abuts against the end face of the second end of the top rod, and the reset spring can provide a reset force for the top rod. The tripping assembly is simple to assemble, and the tripping efficiency and reliability are improved.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, and more specifically, to a tripping assembly and a circuit breaker. Background Technology

[0002] A circuit breaker is a low-voltage electrical component mainly used in industrial power distribution systems to connect and disconnect circuits. Typically, a circuit breaker interrupts current under abnormal circuit conditions through an internal tripping mechanism.

[0003] To prevent irreversible damage to electrical equipment caused by excessive instantaneous current in the circuit, existing circuit breakers use tripping components that can disconnect the operating mechanism based on instantaneous and short-circuit signals. These components include a second moving core that moves according to the instantaneous and short-circuit signals, a first moving core that moves according to an automatic closing command or an electrical signal generated under overheating conditions, and a push rod that passes through the first and second moving cores sequentially. The push rod is fixedly connected to the first moving core, and its movement enables the operating mechanism to trip or reset. However, this connection method is complex to install, and there is a risk that the first moving core and the push rod may detach, leading to tripping failure. Utility Model Content

[0004] The purpose of this utility model is to provide a tripping assembly that is easy to assemble, avoids the risk of the first moving iron core and the push rod falling off, and improves the tripping efficiency and reliability.

[0005] The embodiments of this utility model are implemented as follows:

[0006] In one aspect, this utility model provides a tripping assembly, including a coil frame, a push rod, and a magnetic yoke, the magnetic yoke being disposed on the outer wall of the coil frame; the coil frame having a first moving iron core and a second moving iron core disposed along a first direction, the push rod passing through the second moving iron core and abutting against the end face of the first moving iron core; the push rod having a first end and a second end, the first end being able to extend from the port of the coil frame, the second end abutting against the end face of the first moving iron core; a return spring being sleeved on the first end, one end of the return spring abutting against the port of the coil frame or the magnetic yoke, the other end abutting against the end face of the second end of the push rod, the return spring being able to provide a return force to the push rod.

[0007] Optionally, the coil frame includes a first frame body and a second frame body, with the second frame body partially disposed within the first frame body; the push rod can extend from the port of the second frame body; the first moving iron core is located within the first frame body, and a voltage coil and a current coil are respectively wound around the outer periphery of the first frame body, with the voltage coil corresponding to the first moving iron core and used to receive an automatic closing signal or to sense an overheating signal and drive the first moving iron core to move; the second moving iron core is partially located within the second frame body, with the current coil corresponding to the second moving iron core and used to sense a short-circuit signal or a transient signal and drive the second moving iron core to move;

[0008] When the first trip signal is applied to the first moving iron core, the first moving iron core pushes the push rod to move in the first direction until the first moving iron core comes into contact with the second moving iron core, and the reset spring is compressed and stores energy; when the first trip signal disappears, the reset spring releases energy and drives the push rod to reset, and the second end of the push rod pushes the first moving iron core to reset.

[0009] Optionally, the second end includes an abutment portion and an extension portion connected to each other and extending along a first direction. The extension portion is used to abut against the end face of the first moving iron core, and the abutment portion is located between the first end and the extension portion. The side of the abutment portion facing the first end is a first abutment surface, and the end face diameter of the first abutment surface is larger than the end face diameter of the first end. The return spring can abut against the first abutment surface. The side of the abutment portion facing the extension portion is a second abutment surface, and the end face diameter of the second abutment surface is larger than the end face diameter of the extension portion. The second abutment surface is used to abut against the one-way limiting structure of the second moving iron core. A backup spring is sleeved on the outer wall of the abutment portion of the push rod, and the backup spring is used to provide a return force to the second moving iron core.

[0010] When the second trip signal is applied to the second moving iron core, the second moving iron core drives the push rod to move synchronously in the first direction through the one-way limiting structure until the reset spring and the backup spring are compressed and stored. When the second trip signal disappears, the reset spring releases energy and drives the push rod to reset. The abutting part of the push rod pushes the second moving iron core to reset through the one-way limiting structure. At the same time, the backup spring releases energy and works with the push rod to synchronously drive the second moving iron core to reset.

[0011] Optionally, the unidirectional limiting structure includes a limiting wall protruding from the inner wall of the second moving iron core. When the second moving iron core moves toward the operating mechanism in the first direction, the end face of the limiting wall can abut against the second abutting surface of the abutting part, so that the second moving iron core drives the push rod to move in the first direction.

[0012] Optionally, the magnetic yoke includes an abutment plate perpendicular to the port of the second skeleton body, and the top rod and the port of the second skeleton body pass perpendicularly through the abutment plate.

[0013] Optionally, the magnetic yoke includes a first snap-fit ​​plate and a second snap-fit ​​plate that are parallel to the abutment plate and spaced apart along a first direction. The first snap-fit ​​plate and the second snap-fit ​​plate are fixedly connected by a first connecting plate, and the second snap-fit ​​plate and the abutment plate are fixedly connected by a second connecting plate. The first snap-fit ​​plate and the second snap-fit ​​plate are provided with snap-fit ​​grooves along their edges, and the coil frame is snapped into the snap-fit ​​grooves of the first snap-fit ​​plate and the second snap-fit ​​plate. The abutment plate is also provided with a frame groove for snapping into the second frame body.

[0014] Optionally, a limiting groove is provided on the abutment part of the second skeleton body corresponding to the top rod, the abutment plate of the magnetic yoke can be locked in the limiting groove, and the abutment part of the top rod can be slidably disposed in the skeleton groove.

[0015] Optionally, one end of the backup spring abuts against the one-way limiting structure of the inner wall of the second moving iron core, and the other end abuts against the abutment plate of the magnetic yoke.

[0016] Optionally, the first frame body has a mounting groove on the edge of the side facing the second frame body, and a limiting block protrudes from the outer wall of the second frame body. When the second frame body is partially disposed in the first frame body, the limiting block can be locked in the mounting groove.

[0017] In another aspect, this utility model provides a circuit breaker, an operating mechanism, and a tripping assembly. The tripping assembly includes a push rod, which is disposed opposite to the operating mechanism. The tripping assembly can drive the operating mechanism to open the circuit through the push rod.

[0018] The beneficial effects of this utility model include at least one of the following:

[0019] This application provides a tripping assembly, including a coil frame, a push rod, and a magnetic yoke. The magnetic yoke is disposed on the outer wall of the coil frame. The coil frame contains a first moving iron core and a second moving iron core arranged along a first direction. The push rod passes through the second moving iron core and abuts against the end face of the first moving iron core. By configuring the coil frame, tripping devices for two tripping signals can be integrated into a single structure, enabling the tripping device of this application to trip for both signals. The push rod has a first end and a second end. The first end extends from the port of the coil frame, and the second end abuts against the end face of the first moving iron core. A return spring is sleeved on the first end, with one end abutting against the port of the coil frame or the magnetic yoke, and the other end abutting against the end face of the second end of the push rod. The return spring provides a reset force to the push rod. The return spring enables the push rod to reset, thereby driving the first moving iron core to reset. The entire process avoids the risk of the first moving iron core and the push rod falling off, and assembly is simple, improving tripping efficiency and reliability.

[0020] This application also provides a circuit breaker, including an operating mechanism and a tripping assembly. The tripping assembly includes a push rod, which is disposed opposite to the operating mechanism. The tripping assembly can drive the operating mechanism to open the circuit breaker via the push rod. The circuit breaker described above, through the arrangement of the tripping assembly, can improve tripping efficiency and reliability. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the tripping assembly provided in an embodiment of the present utility model;

[0023] Figure 2 One of the cross-sectional views of the tripping assembly provided in the embodiment of this utility model;

[0024] Figure 3 A schematic diagram of the structure of the first moving iron core and the second moving iron core of the tripping assembly provided in this embodiment of the utility model;

[0025] Figure 4 A schematic diagram of the top rod of the tripping assembly provided in this embodiment of the utility model;

[0026] Figure 5 A cross-sectional view of the first moving iron core pushing the push rod in an embodiment of this utility model;

[0027] Figure 6 A cross-sectional view of the second moving iron core driving the push rod to move, provided for an embodiment of this utility model;

[0028] Figure 7 A schematic diagram of the structure of the magnetic yoke of the tripping assembly provided in this embodiment of the utility model;

[0029] Figure 8 A schematic diagram of the structure of the first skeleton body of the tripping assembly provided in this embodiment of the utility model;

[0030] Figure 9 This is a schematic diagram of the structure of the second skeleton body of the tripping assembly provided in an embodiment of the present utility model;

[0031] Figure 10 This is a schematic diagram of the circuit breaker provided in an embodiment of the present utility model.

[0032] Icons: 100-Trigger assembly; 110-Coil frame; 111-First frame body; 1111-Mounting slot; 112-Second frame body; 1121-Limiting slot; 1122-Limiting block; 120-Push rod; 121-First end; 122-Second end; 1221-Abutting part; 1222-Extension part; 1231-First abutting surface; 1232-Second abutting surface; 130-Magnetic yoke; 131-Abutting part Plate; 1311-Frame groove; 132-First snap-fit ​​plate; 133-Second snap-fit ​​plate; 134-First connecting plate; 135-Second connecting plate; 136-Snap-fit ​​groove; 140-First moving iron core; 150-Second moving iron core; 151-Limiting wall; 160-Voltage coil; 170-Current coil; 180-Reset spring; 190-Backup spring; 200-Circuit breaker; 210-Operating mechanism; a-First direction. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model 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 utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0035] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0036] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] Please refer to Figure 1 , Figure 2 and Figure 3 This embodiment provides a tripping assembly 100, including a coil frame 110, a push rod 120, and a magnetic yoke 130. The magnetic yoke 130 is disposed on the outer wall of the coil frame 110. The coil frame 110 has a first moving iron core 140 and a second moving iron core 150 disposed along a first direction a. The push rod 120 passes through the second moving iron core 150 and abuts against the end face of the first moving iron core 140. The push rod 120 has a first end 121 and a second end 122. The first end 121 can extend from the port of the coil frame 110, and the second end 122 abuts against the end face of the first moving iron core 140. A reset spring 180 is sleeved on the first end 121. One end of the reset spring 180 abuts against the port of the coil frame 110 or the magnetic yoke 130, and the other end abuts against the end face of the second end 122 of the push rod 120. The reset spring 180 can provide a reset force to the push rod 120.

[0038] Specifically, this application provides a tripping assembly 100. When the tripping assembly 100 does not receive a first tripping signal or a second tripping signal, there is a preset distance between the first moving iron core 140 and the second moving iron core 150, and at the same time, there is also a preset distance between the push rod 120 and the operating mechanism 210. At this time, the operating mechanism 210 of the circuit breaker 200 can work normally.

[0039] Please refer to Figure 1 and Figure 2 The first moving iron core 140 and the second moving iron core 150 are connected to the same structure through the coil frame 110, so that the tripping assembly 100 can drive the push rod 120 to trip the operating mechanism 210 according to the first tripping signal and also drive the push rod 120 to trip the operating mechanism 210 according to the second tripping signal. This saves on installation costs and space, and also improves the functional versatility of the tripping assembly 100. Furthermore, the tripping assembly 100 uses the same push rod 120 to trip the operating mechanism 210 through both the first and second tripping signals, thus improving the positional accuracy of the push rod 120 and the operating mechanism 210 during tripping, thereby improving the accuracy and sensitivity of the tripping process.

[0040] In one specific embodiment of this application, such as Figure 2 As shown, the coil frame 110 includes a first frame body 111 and a second frame body 112. Both the first frame body 111 and the second frame body 112 are hollow cylindrical structures. Each of the opposite ends of the first frame body 111 and the second frame body 112 has an opening, allowing the second frame body 112 to be partially disposed within the first frame body 111, forming the coil frame 110. The end of the second frame body 112 facing away from the first frame body 111 has a port, through which a push rod 120 can extend outward to drive the operating mechanism 210 to trip and open the circuit breaker.

[0041] The existing push rod is fixedly connected to the first moving iron core. The first moving iron core drives the push rod to move towards the operating mechanism according to the first trip signal. During reset, the first moving iron core drives the push rod to reset. However, this connection method is complicated to install, and there is a risk of the first moving iron core and the push rod falling off during operation, which may cause the push rod to fail to reset, resulting in tripping failure.

[0042] To avoid the above problems, such as Figure 4 As shown, the present application has an abutment portion 1221 and an extension portion 1222 at the second end 122 of the push rod 120. The abutment portion 1221 is located between the first end 121 and the extension portion 1222 of the push rod 120. A return spring 180 is sleeved on the first end 121. One end of the return spring 180 abuts against the port of the coil frame 110, and the other end abuts against the end face of the abutment portion 1221.

[0043] like Figure 5 As shown, when the first trip signal is applied to the first moving iron core 140, the first moving iron core 140 pushes the push rod 120 to move along the first direction a according to the first trip signal until the first moving iron core 140 abuts against the second moving iron core 150. When the first push rod 120 pushes the push rod 120 to move, the abutting part 1221 of the push rod 120 moves with the push rod 120 to a certain extent, so that the reset spring 180 is compressed by force. The push rod 120 extends from the port of the coil frame 110 to drive the operating mechanism 210 to trip and open the circuit. When the first trip signal disappears, the reset spring 180 releases energy and drives the abutting part 1221 to drive the push rod 120 to reset. At this time, the second end 122 of the push rod 120 pushes the first moving iron core 140 to reset. Throughout the process, the second moving iron core 150 and the push rod 120 are only in abutting relationship, which is simple to assemble and will not cause tripping failure due to detachment.

[0044] Similarly, as Figure 6As shown, when the second trip signal acts on the second moving iron core 150, the second moving iron core 150 moves along the first direction a according to the second trip signal, and drives the push rod 120 to move synchronously through the one-way limiting structure. At this time, the reset spring 180 is compressed, and the push rod 120 extends from the port of the coil frame 110 to drive the operating mechanism 210 to trip and open the circuit breaker. When the second trip signal disappears, the reset spring 180 releases energy and drives the abutment part 1221 to drive the push rod 120 to reset. At this time, the abutment part 1221 of the push rod 120 drives the second moving iron core 150 to reset through the one-way limiting structure.

[0045] It should be noted that, firstly, in one possible implementation of this application, please refer to... Figure 8 and Figure 9 To improve the connection stability of the coil frame 110, the first frame body 111 has an installation groove 1111 on the edge of the side facing the second frame body 112. Correspondingly, the outer wall of the second frame body 112 has a limiting block 1122 protruding, and the assembly position and setting shape of the limiting block 1122 and the installation groove 1111 correspond to each other. When the second frame body 112 is partially set in the first frame body 111, the limiting block 1122 can be locked in the installation groove 1111, thereby preventing the first frame body 111 and the second frame body 112 from falling off.

[0046] Second, in one possible implementation of this application, such as Figure 1 As shown, the tripping assembly 100 also includes a magnetic yoke 130, which is disposed on the outer wall of the coil frame 110. The magnetic yoke 130, together with the moving iron core and the coil, forms a closed magnetic path, preventing the magnetic field from being lost through the air and increasing the magnetic field strength. The magnetic yoke 130 includes an abutment plate 131 perpendicular to the port of the second frame body 112. The push rod 120 and the port of the second frame body 112 are perpendicularly inserted through the abutment plate 131, so that the magnetic yoke 130 can enhance the magnetic field strength without interfering with the movement of the push rod 120.

[0047] For example, such as Figure 2 and Figure 3 As shown, a backup spring 190 is sleeved on the outer wall of the abutment portion 1221 of the top rod 120. One end of the backup spring 190 abuts against the one-way limiting structure of the inner wall of the second moving iron core 150, and the other end abuts against the abutment plate 131 of the magnetic yoke 130.

[0048] Specifically, such as Figure 5As shown, when the first moving iron core 140 pushes the push rod 120 toward the operating mechanism 210 along the first direction a, since one end of the backup spring 190 abuts against the end face of the one-way limiting structure of the inner wall of the second moving iron core 150 and the other end abuts against the abutment plate 131 of the magnetic yoke 130, under the force of the backup spring 190, when the first moving iron core 140 pushes the push rod 120 toward the operating mechanism 210 along the first direction a, the second moving iron core 150 can be fixed relative to the first moving iron core 140, so that the first moving iron core 140 can abut against the second moving iron core 150.

[0049] When the second trip signal is applied to the second moving iron core 150, the second moving iron core 150 drives the push rod 120 to move synchronously along the first direction a through the one-way limiting structure. At this time, the reset spring 180 and the backup spring 190 are compressed and stored energy. When the second trip signal disappears, the reset spring 180 releases energy and drives the push rod 120 to reset. The abutment part 1221 of the push rod 120 pushes the second moving iron core 150 to reset through the one-way limiting structure. At the same time, the backup spring 190 releases energy and cooperates with the push rod 120 to synchronously drive the second moving iron core 150 to reset.

[0050] Third, in one possible implementation of this application, such as Figure 1 As shown, the first moving iron core 140 is located inside the first frame body 111. A voltage coil 160 and a current coil 170 are respectively wound around the outer periphery of the first frame body 111. The voltage coil 160 is correspondingly arranged with the first moving iron core 140 and is used to receive automatic closing signals or sense overheating signals and drive the first moving iron core 140 to move. The second moving iron core 150 is partially located inside the second frame body 112. The current coil 170 is correspondingly arranged with the second moving iron core 150 and is used to sense short-circuit signals or instantaneous signals and drive the second moving iron core 150 to move.

[0051] Specifically, such as Figure 1 As shown, the outer periphery of the first moving iron core 140 is provided with a voltage coil 160 capable of sensing instantaneous signals. For example, in a specific embodiment of this application, a circuit signal is provided to the built-in circuit. At this time, the built-in circuit energizes the voltage coil 160 and generates a magnetic circuit under the action of the magnetic yoke 130, so as to drive the first moving iron core 140 to push the push rod 120 toward the operating mechanism 210 along the first direction a.

[0052] In another specific embodiment of this application, the built-in circuit generates an electrical signal under overheating conditions. At this time, the built-in circuit energizes the voltage coil 160 and generates a magnetic circuit under the action of the magnetic yoke 130, so as to drive the first moving iron core 140 to push the push rod 120 toward the operating mechanism 210 along the first direction a, thereby realizing the instantaneous tripping of the tripping assembly 100.

[0053] like Figure 1As shown, a current coil 170 is wound around the outer periphery of the second moving iron core 150. The main circuit can energize the current coil 170 and generate a magnetic circuit. When the current is large enough, that is, when the electromagnetic driving force is greater than the elastic force of the backup spring 190, the current coil 170 can drive the second moving iron core 150 along the first direction a to move the push rod 120 toward the operating mechanism 210 under the action of the magnetic yoke 130, thereby realizing the short circuit signal tripping of the tripping assembly 100. At this time, the second end 122 of the push rod 120 is released from contact with the first moving iron core 140, and the position of the first moving iron core 140 remains unchanged.

[0054] When the tripping assembly 100 receives the first tripping signal, the first moving iron core 140 drives the push rod 120 to move along the first direction a according to the first tripping signal, wherein the first direction a is the arrangement direction of the first moving iron core 140 and the second moving iron core 150; the first moving iron core 140 can push the push rod 120 toward the operating mechanism 210. At this time, the second moving iron core 150 acts as the stationary iron core until the first moving iron core 140 and the second moving iron core 150 abut against each other, and the push rod 120 just extends from the end of the second frame body 112 toward the operating mechanism 210 to drive the operating mechanism 210 to trip.

[0055] When the tripping assembly 100 receives the second tripping signal, since the second moving iron core 150 is provided with a one-way limiting mechanism, the second moving iron core 150 can drive the push rod 120 to move synchronously along the first direction a toward the operating mechanism 210 according to the second tripping signal through the one-way limiting mechanism. At this time, the abutment plate 131 of the magnetic yoke 130 acts as the stationary iron core until the end face of the second moving iron core 150 abuts against the abutment plate 131. The push rod 120 just extends from the end of the second frame body 112 toward the operating mechanism 210 to drive the operating mechanism 210 to trip.

[0056] Compared with the prior art, this application eliminates the fixed connection between the first moving iron core 140 and the push rod 120. The first moving iron core 140 can push the push rod 120 to drive the operating mechanism 210 to trip and open the circuit breaker. The reset spring 180 can drive the push rod 120 to reset, thereby driving the first moving iron core 140 to reset. The whole process avoids the risk of the first moving iron core 140 and the push rod 120 falling off, and the assembly is simple, improving the tripping efficiency and reliability.

[0057] For example, such as Figure 4As shown, the second end 122 includes an abutment portion 1221 and an extension portion 1222 connected to each other and extending along the first direction a. The extension portion 1222 is used to abut against the end face of the first moving iron core 140. The abutment portion 1221 is located between the first end 121 and the extension portion 1222. The side of the abutment portion 1221 facing the first end 121 is a first abutment surface 1231. The end face diameter of the first abutment surface 1231 is larger than the end face diameter of the first end 121. The return spring 180 can abut against the first abutment surface 1231; preferably, the abutment portion 1221 is cylindrical to fit the accommodating cavity structure in the coil frame 110; the side of the abutment portion 1221 facing the extension portion 1222 is the second abutment surface 1232, the end diameter of the second abutment surface 1232 is larger than the end diameter of the extension portion 1222, and the second abutment surface 1232 is used to abut against the unidirectional limiting structure of the second moving iron core 150.

[0058] In one possible implementation of this application, such as Figure 2 As shown, the unidirectional limiting structure includes a limiting wall 151 protruding from the inner wall of the second moving iron core 150. When the second moving iron core 150 moves toward the operating mechanism 210 along the first direction a, the end face of the limiting wall 151 can abut against the second abutting surface 1232 of the abutting part 1221, so that the second moving iron core 150 drives the push rod 120 to move along the first direction a.

[0059] Specifically, such as Figure 2 As shown, the unidirectional limiting structure includes a limiting wall 151 protruding from the inner wall of the second moving iron core 150. When the second moving iron core 150 moves towards the operating mechanism 210 along the first direction a, the end face of the limiting wall 151 can just abut against the second abutment surface 1232. At this time, the second moving iron core 150 can drive the push rod 120 to move towards the operating mechanism 210 through the second abutment surface 1232. Since the end face of the limiting wall 151 only abuts against the second abutment surface 1232, when the first moving iron core 140 pushes the push rod 120 towards the operating mechanism 210, it will not drive the second moving iron core 150 to move. The second moving iron core 150 can drive the push rod 120 to move towards the operating mechanism 210 a preset distance through the second abutment surface 1232 until the end of the second moving iron core 150 abuts against the abutment plate 131. The abutment plate 131 plays a limiting and fixing role for the second moving iron core 150.

[0060] By setting a one-way limiting structure, the first moving iron core 140 and the second moving iron core 150 can drive the top rod 120 to move respectively, so that the tripping assembly 100 can independently and reliably disconnect the operating mechanism 210 according to the instantaneous signal and the short circuit signal.

[0061] For example, such as Figure 7As shown, the magnetic yoke 130 includes a first snap-fit ​​plate 132 and a second snap-fit ​​plate 133 that are parallel to the abutment plate 131 and spaced apart along the first direction a. The first snap-fit ​​plate 132 and the second snap-fit ​​plate 133 are fixedly connected by a first connecting plate 134, and the second snap-fit ​​plate 133 and the abutment plate 131 are fixedly connected by a second connecting plate 135. The first snap-fit ​​plate 132 and the second snap-fit ​​plate 133 are provided with snap-fit ​​grooves 136 along their edges. The coil frame 110 is snapped into the snap-fit ​​grooves 136 of the first snap-fit ​​plate 132 and the snap-fit ​​grooves 136 of the second snap-fit ​​plate 133. The abutment plate 131 is also provided with a frame groove 1311 for snapping into the second frame body 112.

[0062] Specifically, the magnetic yoke 130 includes a first snap-fit ​​plate 132 and a second snap-fit ​​plate 133, the first snap-fit ​​plate 132, the second snap-fit ​​plate 133 and the abutment plate 131 are spaced apart and parallel to each other; the magnetic yoke 130 also includes a first connecting plate 134 and a second connecting plate 135, the first snap-fit ​​plate 132 and the second snap-fit ​​plate 133 are fixedly connected by the first connecting plate 134, and the second snap-fit ​​plate 133 and the abutment plate 131 are fixedly connected by the second connecting plate 135.

[0063] Optionally, in one specific embodiment of this application, such as Figure 7 As shown, the first connecting plate 134 and the second connecting plate 135 are respectively disposed on opposite sides of the second snap-fit ​​plate 133, and the first connecting plate 134 and the second connecting plate 135 are respectively perpendicular to the second snap-fit ​​plate 133, that is, the magnetic yoke 130 has an "S"-shaped structure; in another optional embodiment of this application, the first connecting plate 134 and the second connecting plate 135 can also be disposed on the same side of the second snap-fit ​​plate 133, and the first connecting plate 134 and the second connecting plate 135 are respectively perpendicular to the second snap-fit ​​plate 133, that is, the magnetic yoke 130 has an "E"-shaped structure. This application does not impose any restrictions on the specific arrangement of the first connecting plate 134 and the second connecting plate 135.

[0064] The first snap-fit ​​plate 132 and the second snap-fit ​​plate 133 have snap-fit ​​grooves 136 along their edges. Preferably, as shown in the figure... Figure 7 As shown, in order to adapt to the shape and structure of the coil frame 110, the snap-fit ​​groove 136 has a U-shaped structure; or, through holes can be provided on the first snap-fit ​​plate 132 and the second snap-fit ​​plate 133 for the coil frame 110 to pass through. This application does not limit the specific connection method of the first snap-fit ​​plate 132, the second snap-fit ​​plate 133 and the coil frame 110.

[0065] The abutment plate 131 is also provided with a skeleton groove 1311 for engaging the second skeleton body 112. One side of the skeleton groove 1311 is opened along the edge of the abutment plate 131 for passing through the top rod 120; or, a through hole can be opened on the abutment plate 131 for passing through the top rod 120. This application does not impose any restrictions on the specific way the abutment plate 131 and the top rod 120 are passed through.

[0066] In one possible embodiment of this application, the second skeleton body 112 is provided with a limiting groove 1121 corresponding to the abutment portion 1221 of the top rod 120, the abutment plate 131 of the magnetic yoke 130 can be locked in the limiting groove 1121, and the abutment portion 1221 of the top rod 120 can be slidably disposed in the skeleton groove 1311.

[0067] Specifically, such as Figure 9 As shown, a limiting groove 1121 is provided on the second frame body 112 along the extending direction of the abutment plate 131, and the abutment plate 131 can be engaged in the limiting groove 1121; wherein, the limiting groove 1121 is located on the side of the second frame body 112 facing the first frame body 111. The abutment portion 1221 of the push rod 120 can be slidably disposed in the frame groove 1311 along the first direction a, so that the first end 121 of the push rod 120 can extend out of the port of the second frame body 112. The setting of the limiting groove 1121 can further improve the connection stability of the magnetic yoke 130.

[0068] Another aspect of this utility model, such as Figure 10 As shown, a circuit breaker 200 is provided, including a tripping assembly 100 and an operating mechanism 210. The tripping assembly 100 includes a push rod 120, which is disposed opposite to the operating mechanism 210. When the tripping assembly 100 is activated by a first tripping signal or a second tripping signal, it can drive the push rod 120 to move toward the operating mechanism 210. At this time, the push rod 120 can abut against the latch of the operating mechanism 210, thereby causing the operating mechanism 210 to trip. The specific structure and beneficial effects of the tripping assembly 100 have been described in detail above and will not be repeated here. The circuit breaker 200, through the provision of the tripping assembly 100, can improve tripping efficiency and reliability.

[0069] The above description is merely an optional embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0070] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

Claims

1. A tripping assembly, characterized in that, The device includes a coil frame (110), a push rod (120), and a magnetic yoke (130), the magnetic yoke (130) being disposed on the outer wall of the coil frame (110); the coil frame (110) has a first moving iron core (140) and a second moving iron core (150) disposed along a first direction (a), the push rod (120) passing through the second moving iron core (150) and abutting against the end face of the first moving iron core (140); the push rod (120) has a first end (121) and a second end (122), the first... The first end (121) can extend from the port of the coil frame (110), and the second end (122) abuts against the end face of the first moving iron core (140); the first end (121) is fitted with a return spring (180), one end of the return spring (180) abuts against the port of the coil frame (110) or the magnetic yoke (130), and the other end abuts against the end face of the second end (122) of the push rod (120), and the return spring (180) can provide a return force to the push rod (120).

2. The tripping assembly according to claim 1, characterized in that, The coil frame (110) includes a first frame body (111) and a second frame body (112), with the second frame body (112) partially disposed inside the first frame body (111); the top rod (120) can extend out from the port of the second frame body (112); the first moving iron core (140) is located inside the first frame body (111), and a voltage coil (160) and a current coil (170) are respectively wound around the outer periphery of the first frame body (111), the voltage coil (160) is correspondingly disposed with the first moving iron core (140), and is used to receive an automatic closing signal or an overheating signal and drive the first moving iron core (140) to move; The second moving iron core (150) is located inside the second skeleton body (112). The current coil (170) is correspondingly arranged with the second moving iron core (150) and is used to sense short-circuit signals or instantaneous signals and drive the second moving iron core (150) to move. When the first trip signal is applied to the first moving iron core (140), the first moving iron core (140) pushes the push rod (120) to move along the first direction (a) until the first moving iron core (140) abuts against the second moving iron core (150), and the reset spring (180) is compressed and stores energy; when the first trip signal disappears, the reset spring (180) releases energy and drives the push rod (120) to reset, and the second end (122) of the push rod (120) pushes the first moving iron core (140) to reset.

3. The tripping assembly according to claim 2, characterized in that, The second end (122) includes an abutment portion (1221) and an extension portion (1222) connected to each other and extending along the first direction (a). The extension portion (1222) is used to abut against the end face of the first moving iron core (140). The abutment portion (1221) is located between the first end (121) and the extension portion (1222). The side of the abutment portion (1221) facing the first end (121) is a first abutment surface (1231). The end face diameter of the first abutment surface (1231) is larger than the end face diameter of the first end (121). The return spring (18) 0) It can abut against the first abutting surface (1231); the side of the abutting part (1221) facing the extension part (1222) is the second abutting surface (1232), the end diameter of the second abutting surface (1232) is larger than the end diameter of the extension part (1222), and the second abutting surface (1232) is used to abut against the one-way limiting structure of the second moving iron core (150); the outer wall of the abutting part (1221) of the push rod (120) is fitted with a backup spring (190), and the backup spring (190) is used to provide a restoring force to the second moving iron core (150); When the second trip signal is applied to the second moving iron core (150), the second moving iron core (150) drives the push rod (120) to move synchronously along the first direction (a) through the one-way limiting structure until the reset spring (180) and the backup spring (190) are compressed and stored. When the second trip signal disappears, the reset spring (180) releases energy and drives the push rod (120) to reset. The abutment part (1221) of the push rod (120) pushes the second moving iron core (150) to reset through the one-way limiting structure. At the same time, the backup spring (190) releases energy and cooperates with the push rod (120) to synchronously drive the second moving iron core (150) to reset.

4. The tripping assembly according to claim 3, characterized in that, The unidirectional limiting structure includes a limiting wall (151) protruding from the inner wall of the second moving iron core (150). When the second moving iron core (150) moves toward the operating mechanism (210) in the first direction (a), the end face of the limiting wall (151) can abut against the second abutting surface (1232) of the abutting part (1221) so that the second moving iron core (150) drives the top rod (120) to move in the first direction (a).

5. The tripping assembly according to claim 3, characterized in that, The magnetic yoke (130) includes an abutment plate (131) perpendicular to the port of the second skeleton body (112), and the top rod (120) and the port of the second skeleton body (112) are perpendicularly inserted through the abutment plate (131).

6. The tripping assembly according to claim 5, characterized in that, The magnetic yoke (130) includes a first snap-fit ​​plate (132) and a second snap-fit ​​plate (133) that are parallel to the abutment plate (131) and spaced apart along a first direction (a). The first snap-fit ​​plate (132) and the second snap-fit ​​plate (133) are fixedly connected by a first connecting plate (134), and the second snap-fit ​​plate (133) and the abutment plate (131) are fixedly connected by a second connecting plate (135). The first snap-fit ​​plate (132) and the second snap-fit ​​plate (133) are provided with snap-fit ​​grooves (136) along their edges. The coil frame (110) is snapped in the snap-fit ​​grooves (136) of the first snap-fit ​​plate (132) and the snap-fit ​​grooves (136) of the second snap-fit ​​plate (133). The abutment plate (131) is also provided with a frame groove (1311) for snapping the second frame body (112).

7. The tripping assembly according to claim 6, characterized in that, The second skeleton body (112) has a limiting groove (1121) corresponding to the abutment part (1221) of the top rod (120). The abutment plate (131) of the magnetic yoke (130) can be locked in the limiting groove (1121), and the abutment part (1221) of the top rod (120) can be slidably disposed in the skeleton groove (1311).

8. The tripping assembly according to claim 7, characterized in that, One end of the backup spring (190) abuts against the one-way limiting structure of the inner wall of the second moving iron core (150), and the other end abuts against the abutment plate (131) of the magnetic yoke (130).

9. The tripping assembly according to claim 2, characterized in that, The first skeleton body (111) has an installation groove (1111) on the edge of the side facing the second skeleton body (112). The outer wall of the second skeleton body (112) is provided with a limiting block (1122). When the second skeleton body (112) is partially disposed in the first skeleton body (111), the limiting block (1122) can be locked in the installation groove (1111).

10. A circuit breaker, characterized in that, The device includes an operating mechanism (210) and a tripping assembly (100) as described in any one of claims 1-9. The tripping assembly (100) includes a push rod (120) which is disposed opposite to the operating mechanism (210). The tripping assembly (100) can drive the operating mechanism (210) to open the circuit through the push rod (120).

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