Tripping structure and circuit breaker

Abstract

The application discloses a tripping structure and a circuit breaker, and relates to the technical field of low-voltage electrical apparatuses. The tripping structure comprises a tripping piece, a thermal tripping piece and an electromagnetic tripping assembly which are respectively in driving cooperation with the tripping piece. The electromagnetic tripping assembly comprises a magnetic yoke and an iron core assembly which is mounted on the magnetic yoke. The tripping piece is slidably arranged on the magnetic yoke, and the tripping piece and the iron core assembly are adjacently arranged. The thermal tripping piece and the electromagnetic tripping assembly are used for respectively and independently driving the tripping piece to slide relative to the magnetic yoke, so as to drive an operating mechanism to trip and be unlocked. The tripping structure integrates the tripping piece, the thermal tripping piece and the electromagnetic tripping assembly, so as to solve the problem that the space on both sides of the operating mechanism is excessively large when the existing thermal tripping device and the electromagnetic tripping device are independently arranged, and is beneficial to the miniaturization of products.

Description

Technical Field

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

[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions, and capable of closing, carrying, and interrupting current under abnormal circuit conditions within a specified time. When faults such as leakage, overload, or short circuit occur in the system, the circuit breaker can quickly disconnect the faulty circuit or cut off the entire power supply to prevent the fault from escalating and avoid economic losses and personal injury.

[0003] To achieve overload and short-circuit protection, existing circuit breakers typically have two different trip units inside the casing: a thermal trip unit and an electromagnetic trip unit. These two trip units are usually located on opposite sides of the operating mechanism, which occupies space on both sides of the operating mechanism, increasing the difficulty of internal layout and hindering the miniaturization of the circuit breaker. Utility Model Content

[0004] The purpose of this application is to provide a tripping structure and circuit breaker that integrates the tripping element, thermal tripping element and electromagnetic tripping assembly into one, so as to solve the problem of excessive space occupation on both sides of the operating mechanism when the existing thermal tripping device and electromagnetic tripping device are set independently, which is conducive to the miniaturization of the product.

[0005] The embodiments of this application are implemented as follows: A first aspect of this application provides a tripping structure, including a tripping element and a thermal tripping element and an electromagnetic tripping assembly respectively driven and cooperated with the tripping element. The electromagnetic tripping assembly includes a magnetic yoke and an iron core assembly mounted on the magnetic yoke. The tripping element is slidably disposed on the magnetic yoke, and the tripping element and the iron core assembly are arranged adjacent to each other. The thermal tripping element and the electromagnetic tripping assembly are used to independently drive the tripping element to slide relative to the magnetic yoke, thereby actuating the operating mechanism to trip and unlock. This tripping structure integrates the tripping element, thermal tripping element, and electromagnetic tripping assembly together to solve the problem of excessive space occupation on both sides of the operating mechanism when the existing thermal tripping device and electromagnetic tripping device are set independently, which is beneficial to the miniaturization of the product.

[0006] In one possible implementation, the magnetic yoke includes a first mounting plate and a second mounting plate disposed opposite to each other, and a connecting plate fixedly connecting the first mounting plate and the second mounting plate. The opposite ends of the iron core assembly are respectively mounted on the first mounting plate and the second mounting plate. A first sliding groove is provided on the side of the first mounting plate away from the iron core assembly, and a second sliding groove is correspondingly provided on the side of the second mounting plate away from the iron core assembly. The opposite ends of the release member are respectively slidably disposed in the first sliding groove and the second sliding groove.

[0007] In one possible implementation, the tripping component includes a push seat and a top rod that is limited and mounted on the push seat. The push seat is slidably disposed in the first slide groove, and the top rod is slidably disposed in the second slide groove. The side of the push seat away from the top rod has a first abutting surface, and the end of the top rod away from the push seat has a second abutting surface. The deformed end of the thermal tripping component and the electromagnetic tripping assembly abut against the first abutting surface, respectively. The push seat can be independently driven to slide in the first slide groove and the top rod can slide in the same direction in the second slide groove, so as to abut against the operating mechanism through the second abutting surface, thereby unlocking the operating mechanism.

[0008] In one possible implementation, the push seat is provided with a mounting groove on the side away from the first abutment surface, and the end of the push rod away from the second abutment surface is installed in the mounting groove; the mounting groove is provided with a first limiting part for abutting against the push rod, and / or the push rod is provided with a second limiting part for abutting against the mounting groove, so as to limit the movement of the push rod relative to the mounting groove in the axial and radial directions of the push rod.

[0009] As one possible implementation, when the mounting groove is provided with a first limiting part, the first limiting part is a protrusion or groove provided on the inner wall of the mounting groove; when the top rod is provided with a second limiting part, the second limiting part is a groove or protrusion provided on the outer wall of the top rod.

[0010] In one possible implementation, the push seat has a protruding abutment on the side near the connecting plate, the connecting plate is provided with a limiting groove, the abutment is slidably disposed in the limiting groove, and the side wall of the abutment can abut against the inner wall of the limiting groove.

[0011] As one possible implementation, an assembly hole is provided on the first abutment surface, and the electromagnetic release assembly further includes a push rod. One end of the push rod has an action part, and the other end passes through the assembly hole, the magnetic yoke, and the iron core assembly. The action part abuts against the first abutment surface, and the push rod can be driven to slide the release member through the action part.

[0012] As one possible implementation, it also includes an elastic element, which is sleeved on the top rod. The first end of the elastic element abuts against the side of the mounting groove away from the first abutting surface, and the second end abuts against the side of the second mounting plate away from the second abutting surface. The elastic element is used to provide a restoring force for the sliding of the release member relative to the magnetic yoke.

[0013] As one possible implementation, when the release member is in the normal state, the side of the first mounting plate away from the first abutting surface abuts against the side of the mounting groove away from the second abutting surface. When the release member is in the release state, the side of the first mounting plate close to the first abutting surface abuts against the limiting surface. The limiting surface is located on the side of the push seat away from the top rod, and the limiting surface is opposite to the first abutting surface.

[0014] A second aspect of this application provides a circuit breaker, including a housing, an operating mechanism disposed within the housing, and the aforementioned tripping structure. The tripping structure is driven to move toward the side closer to the operating mechanism, thereby unlocking the operating mechanism and tripping the circuit breaker. This tripping structure integrates the tripping element, the thermal tripping element, and the electromagnetic tripping assembly into one unit, solving the problem of excessive space occupation on both sides of the operating mechanism when the existing thermal and electromagnetic tripping devices are independently installed, thus facilitating product miniaturization.

[0015] The beneficial effects of the embodiments of this application include: The tripping structure includes a tripping element and a thermal tripping element and an electromagnetic tripping assembly that drive and cooperate with the tripping element. The electromagnetic tripping assembly includes a magnetic yoke and an iron core assembly mounted on the magnetic yoke. The tripping element is slidably disposed on the magnetic yoke, and the tripping element and the iron core assembly are arranged adjacent to each other. The thermal tripping element and the electromagnetic tripping assembly are used to independently drive the tripping element to slide relative to the magnetic yoke, thereby actuating the operating mechanism to trip and unlock. By integrating the tripping element, thermal tripping element, and electromagnetic tripping assembly together to form an integrated tripping structure, it can achieve overload protection through the thermal tripping element and short-circuit protection through the electromagnetic tripping element. Furthermore, the integrated design replaces the traditional layout of separate thermal and electromagnetic tripping units. This design significantly reduces the space occupied on both sides of the operating mechanism and avoids the excessive overall size of the product caused by the separate arrangement of the two tripping units, thus laying the foundation for product miniaturization from a structural perspective. All core components use the magnetic yoke as a unified mounting carrier. The sliding trajectory of the tripping component, the direction of action of the thermal tripping component, and the thrust direction of the iron core assembly are all limited within a preset range (such as being in or approximately in the same straight line). This can avoid transmission interference caused by component misalignment and also avoid excessive lateral force caused by the installation position and force application position of the tripping device being far apart. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the circuit breaker in the closed state provided in an embodiment of this application; Figure 2 This is a schematic diagram of the tripping structure provided in the embodiments of this application; Figure 3 This is a schematic diagram of the structure of the magnetic yoke provided in an embodiment of this application; Figure 4 This is a schematic diagram of the assembly of the push seat and the push rod provided in the first embodiment of this application; Figure 5 This is a schematic diagram of the structure where the push seat and the push rod are separated, as provided in the first embodiment of this application; Figure 6 This is a schematic diagram of the assembly of the push seat and the push rod provided in the second embodiment of this application; Figure 7 This is a schematic diagram of the structure where the push seat and the push rod are separated, as provided in the second embodiment of this application.

[0018] Icons: 100-Trigger structure; 10-Trigger component; 11-Push seat; 111-First abutting surface; 1111-Assembly hole; 112-Mounting slot; 1121-First limiting part; 1122-Snap; 113-Abutting part; 114-Limiting surface; 115-Deformation mark; 12-Push rod; 121-Second abutting surface; 122-Second limiting part; 20-Thermal trigger component; 30-Electromagnetic trigger assembly; 31-Magnetic yoke; 31 1-First mounting plate; 3111-First slide groove; 3112-First mounting slot; 312-Second mounting plate; 3121-Second slide groove; 3122-Second mounting slot; 313-Connecting plate; 3131-Limiting slot; 32-Core assembly; 33-Push rod; 331-Actuating part; 34-Coil; 40-Elastic element; 200-Circuit breaker; 210-Housing; 220-Operating mechanism; 221-Tap latch; 222-Lock. Detailed Implementation

[0019] 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. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0020] In the description of this application, 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 is in use. These terms are used only for the convenience of describing this application and for 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. Furthermore, the terms "horizontal," "vertical," etc., do not indicate that the component must be absolutely horizontal or suspended, but can be slightly tilted. The terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "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 a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0022] Please refer to the reference. Figures 1 to 7 This application provides a tripping structure 100, including a tripping element 10 and a thermal tripping element 20 and an electromagnetic tripping assembly 30, which are respectively driven and cooperate with the tripping element 10. The electromagnetic tripping assembly 30 includes a magnetic yoke 31 and an iron core assembly 32 mounted on the magnetic yoke 31. The tripping element 10 is slidably disposed on the magnetic yoke 31, and the tripping element 10 and the iron core assembly 32 are arranged adjacent to each other. The thermal tripping element 20 and the electromagnetic tripping assembly 30 are used to independently drive the tripping element 10 to slide relative to the magnetic yoke 31, so as to drive the operating mechanism 220 to trip and unlock. This tripping structure 100 integrates the tripping element 10, the thermal tripping element 20 and the electromagnetic tripping assembly 30 together to solve the problem of excessive space occupation on both sides of the operating mechanism 220 when the existing thermal tripping device and electromagnetic tripping device are set independently, which is conducive to the miniaturization of the product.

[0023] It should be noted that the tripping structure 100 includes a tripping element 10, a thermal tripping element 20, and an electromagnetic tripping assembly 30. The electromagnetic tripping assembly 30 is driven to engage with the tripping element 10. The electromagnetic tripping assembly 30 includes a magnetic yoke 31 and an iron core assembly 32. The iron core assembly 32 is mounted on the magnetic yoke 31. For example, the iron core assembly 32 can be fixed by bolts or directly embedded into a preset mounting position of the magnetic yoke 31. The tripping element 10 is slidably disposed on the magnetic yoke 31. For example, the magnetic yoke 31 is provided with a sliding groove, and the tripping element 10 is slidably disposed in the sliding groove. The tripping element 10 and the iron core assembly 32 are arranged adjacent to each other. In other words, the two are close to each other to ensure that the iron core assembly 32 can reach the tripping element 10 when it is activated. The installation position of the tripping element 10 on the magnetic core and the force-bearing position of the tripping element 10 are on or approximately on the same straight line. The thermal tripping element 20 is also driven to engage with the tripping element 10. The three together form a whole tripping structure 100.

[0024] When an overload current occurs in the thermal trip unit 20, the thermal trip unit 20 deforms or actuates due to heat (such as the bimetallic strip bending due to heat), so as to independently drive the trip unit 10 to slide relative to the magnetic yoke 31. The electromagnetic trip assembly 30 also includes a coil 34 wound around the outer periphery of the iron core assembly 32. When a short-circuit current occurs in the coil 34, an induced magnetic field is generated, which causes the moving iron core and the stationary iron core of the iron core assembly 32 to generate an attraction force, so as to independently drive the trip unit 10 to slide relative to the magnetic yoke 31. Regardless of whether the thermal trip unit 20 or the electromagnetic trip assembly 30 drives it, the trip unit 10 will trigger the operating mechanism 220 after sliding, which will drive the operating mechanism 220 to unlock (such as the jump latch 221 and the lock latch 222 unlock), and finally realize the circuit disconnection protection.

[0025] The tripping structure 100 provided in this application integrates the tripping element 10, the thermal tripping element 20, and the electromagnetic tripping assembly 30 into a single integrated tripping structure 100. This integrated structure provides overload protection via the thermal tripping element 20 and short-circuit protection via the electromagnetic tripping element 10. Furthermore, the integrated design replaces the traditional layout where the thermal and electromagnetic tripping units are independently located (e.g., on opposite sides of the operating mechanism 220). This design significantly reduces the space occupied on both sides of the operating mechanism 220, avoiding an excessively large overall product size due to the dispersed arrangement of the two tripping units, thus laying a structural foundation for product miniaturization.

[0026] The integrated design makes the tripping structure 100 an independent module. This independent module uses the magnetic yoke 31 as a carrier and is pre-installed with the iron core assembly 32, the tripping component 10 and the thermal tripping component 20. During assembly, it is only necessary to connect this independent module to the operating mechanism 220. There is no need to install two independent tripping devices separately and adjust their relative positions. This can reduce assembly steps and alignment difficulty, reduce labor costs, and improve the assembly qualification rate, making it suitable for mass production.

[0027] The trip unit 10, thermal trip unit 20, and core assembly 32 are all arranged adjacent to each other. The action of thermal trip unit 20 or core assembly 32 can directly drive the trip unit 10 to slide, without the need to transmit power through complex linkages or transmission components. Compared with the long path transmission of "trip unit - linkage or transmission component - operating mechanism 220" in the traditional distributed layout, this short path drive can reduce power loss and action delay, making the trip response faster (such as faster circuit disconnection in case of short circuit or overload), thereby improving the reliability of circuit protection.

[0028] All core components use the magnetic yoke 31 as a unified mounting carrier. The sliding trajectory of the tripping component 10 (such as along the groove of the magnetic yoke 31), the direction of action of the thermal tripping component 20, and the direction of thrust of the core assembly 32 are all limited within a preset range (such as being on or approximately on the same straight line). This avoids transmission interference caused by component misalignment in traditional distributed layouts (such as linkage jamming when the tripping device operates), and also avoids excessive lateral force caused by the installation position and force application position of the tripping device being far apart. At the same time, the magnetic yoke 31 can provide stable support for each component, reduce the impact of vibration or impact on tripping performance, and extend the product's service life.

[0029] As one possible implementation method, such as Figures 1 to 3 As shown, the magnetic yoke 31 includes a first mounting plate 311 and a second mounting plate 312 disposed opposite to each other, and a connecting plate 313 fixedly connecting the first mounting plate 311 and the second mounting plate 312. The opposite ends of the iron core assembly 32 are respectively mounted on the first mounting plate 311 and the second mounting plate 312. The side of the first mounting plate 311 away from the iron core assembly 32 is provided with a first sliding groove 3111, and the side of the second mounting plate 312 away from the iron core assembly 32 is provided with a corresponding second sliding groove 3121. The opposite ends of the release member 10 are respectively slidably disposed in the first sliding groove 3111 and the second sliding groove 3121.

[0030] It should be noted that the magnetic yoke 31 includes a first mounting plate 311, a second mounting plate 312, and a connecting plate 313. The first mounting plate 311 and the second mounting plate 312 are arranged opposite to each other (e.g., parallel and spaced apart). The connecting plate 313 is fixedly connected between the first mounting plate 311 and the second mounting plate 312 (e.g., perpendicularly connected to the edges of the first mounting plate 311 and the second mounting plate 312), forming an approximately U-shaped frame structure to provide a mounting base for other components. The opposite ends of the iron core assembly 32 (i.e., the ends of the moving iron core and the stationary iron core that are far apart from each other) are respectively mounted on the first mounting plate 311 and the second mounting plate 312 (e.g., embedded in the first mounting groove 3112 of the first mounting plate 311 and the second mounting groove 3122 of the second mounting plate 312), so that the iron core assembly 32 spans between the two mounting plates and is located inside the magnetic yoke 31.

[0031] The first mounting plate 311 has a first groove 3111 on the side away from the core assembly 32 (i.e., the side of the first mounting plate 311 facing the outside of the magnetic yoke 31), and the second mounting plate 312 has a corresponding second groove 3121 on the side away from the core assembly 32 (i.e., the side of the second mounting plate 312 facing the outside of the magnetic yoke 31). The extension direction of the first groove 3111 and the extension direction of the second groove 3121 are parallel to or coincide with each other. The opposite ends of the release member 10 (i.e., the two sides of the release member 10 corresponding to the first mounting plate 311 and the second mounting plate 312) are respectively embedded in the first groove 3111 and the second groove 3121, so that the release member 10 can slide along the extension direction of the first groove 3111 and the second groove 3121, so as to realize the reciprocating motion of the release member 10 relative to the magnetic yoke 31.

[0032] By creating a groove on the magnetic yoke 31 and sliding the tripping member 10 within the groove, the magnetic yoke 31 can serve as a mounting carrier for the tripping member 10, providing guidance for its sliding and ensuring that the tripping member 10 accurately contacts the operating mechanism 220. Furthermore, it can reduce the vertical distance between the installation position (i.e., the location of the groove) and the force-bearing position (i.e., the position where the thermal tripping member 20 and the electromagnetic tripping assembly 30 exert force on the tripping member 10) of the tripping member 10, thereby reducing the lateral force on the tripping member 10.

[0033] As one possible implementation method, such as Figures 1 to 3 As shown, the tripping component 10 includes a push seat 11 and a top rod 12 that is limited and mounted on the push seat 11. The push seat 11 is slidably disposed in the first slide groove 3111, and the top rod 12 is slidably disposed in the second slide groove 3121. The side of the push seat 11 away from the top rod 12 has a first abutting surface 111, and the end of the top rod 12 away from the push seat 11 has a second abutting surface 121. The deformable end of the thermal tripping component 20 and the electromagnetic tripping component 30 abut against the first abutting surface 111 respectively. The push seat 11 and the top rod 12 can be independently driven to slide in the same direction in the first slide groove 3111 and the second slide groove 3121, so as to abut against the operating mechanism 220 through the second abutting surface 121, thereby enabling the operating mechanism 220 to unlock.

[0034] It should be noted that the tripping component 10 includes a push seat 11 and a push rod 12. The push rod 12 is fixedly mounted on the push seat 11, for example, by a slot, snap, or thread, to ensure that the push seat 11 and the push rod 12 move synchronously and their relative positions remain unchanged. The push seat 11 is slidably disposed within the first slide groove 3111, and the push rod 12 is slidably disposed within the second slide groove 3121. The two are rigidly connected to form a whole and can slide in the same direction along the extension direction of the first slide groove 3111 and the second slide groove 3121 (e.g., horizontally). The push seat 11 has a first abutment surface 111 (e.g., a plane or inclined surface) on the side away from the push rod 12. The deformable end of the thermal tripping component 20 (e.g., the free end of a bimetallic strip bent by heat) and the push rod 33 of the electromagnetic tripping assembly 30 abut against the first abutment surface 111 (maintaining contact only; the tripping component 10 will not slide when no force is applied). The end of the push rod 12 away from the push seat 11 is provided with a second abutment surface 121 (such as a convex surface or flat surface adapted to the locking 222 of the operating mechanism 220), which is used to contact the operating mechanism 220 and trigger it to unlock.

[0035] When the thermal tripping component 20 deforms due to heat, its deformed end pushes the first abutment surface 111, driving the pusher seat 11 to slide along the first slide groove 3111. The push rod 12 slides synchronously with the pusher seat 11 along the second slide groove 3121 in the same direction, and finally abuts against the operating mechanism 220 through the second abutment surface 121, pushing it to unlock. When the electromagnetic tripping component 30 is activated, the moving iron core and the stationary iron core attract each other, causing the push rod 33 to push the first abutment surface 111, driving the pusher seat 11 to slide along the first slide groove 3111. The push rod 12 slides synchronously with the pusher seat 11 along the second slide groove 3121 in the same direction, and finally triggers the operating mechanism 220 to unlock through the second abutment surface 121. The two driving methods are independent of each other, but both achieve the unlocking of the operating mechanism 220 through the sliding of the tripping component 10. This ensures that the circuit can reliably trip under different fault scenarios, improving the comprehensiveness of circuit protection.

[0036] The push seat 11 and the push rod 12 are rigidly connected and slidably disposed in their respective grooves. The driving force (from the thermal trip unit 20 or the electromagnetic trip assembly 30) is directly transmitted to the push seat 11 through the first abutment surface 111, and then to the second abutment surface 121 through the push rod 12. The transmission path is short and there are no redundant parts, reducing power loss. At the same time, the grooves define the sliding direction, ensuring that all driving force is converted into the same-direction sliding of the trip unit 10, so that the second abutment surface 121 can accurately act on the operating mechanism 220, improving the efficiency of the tripping action. The trip unit 10 adopts a design that integrates the push seat 11 and the push rod 12 into one piece, which can realize the transmission of force without additional connecting rods or transmission components. Compared with the traditional separate drive structure (such as the thermal trip unit and the electromagnetic trip unit driving the operating mechanism 220 through independent transmission components), there are fewer parts and the structure is more compact. With the guide design of the grooves, the space occupied by the tripping structure 100 in the sliding direction perpendicular to the trip unit 10 can be reduced, which helps to miniaturize the product.

[0037] Furthermore, a deformation mark 115 (such as a color mark, text mark, multiple grooves or protrusions, etc.) is provided on the side of the push seat 11 away from the top rod 12, so that the position of the deformation mark 115 corresponding to the deformation end of the thermal release component 20 can be used to facilitate the manufacturer to quickly observe and judge the installation and adjustment position of the thermal release component 20.

[0038] As one possible implementation method, such as Figures 4 to 7 As shown, a mounting groove 112 is provided on the side of the push seat 11 away from the first abutment surface 111, and one end of the push rod 12 away from the second abutment surface 121 is installed in the mounting groove 112; a first limiting part 1121 for abutting against the push rod 12 is provided on the mounting groove 112, and / or a second limiting part 122 for abutting against the mounting groove 112 is provided on the push rod 12, so as to limit the movement of the push rod 12 relative to the mounting groove 112 in the axial and radial directions of the push rod 12. As one possible implementation, such as... Figures 4 to 7 As shown, when the mounting groove 112 is provided with a first limiting part 1121, the first limiting part 1121 is a protrusion or groove provided on the inner wall of the mounting groove 112; when the push rod 12 is provided with a second limiting part 122, the second limiting part 122 is a groove or protrusion provided on the outer wall of the push rod 12.

[0039] It should be noted that the push seat 11 has a mounting groove 112 (such as a groove, blind hole or arc-shaped groove with a buckle 1122) on the side away from the first abutment surface 111 (i.e. the side facing the push rod 12) to prevent the push rod 12 from coming out of the mounting groove 112. The end of the push rod 12 away from the second abutment surface 121 (i.e. the end connected to the push seat 11) is embedded and installed in the mounting groove 112, forming an assembly structure in which "one end of the push rod 12 is inserted into the mounting groove 112 of the push seat 11". The mounting groove 112 is provided with a first limiting part 1121 (such as an annular step, radial protrusion, or axial stop on the inner wall of the mounting groove 112), and the push rod 12 may be provided with a corresponding second limiting part 122 (such as an annular flange, radial groove, or axial protrusion on the outer wall of the push rod 12). The first limiting part 1121 abuts against the push rod 12, and / or the second limiting part 122 abuts against the mounting groove 112, thus achieving double limiting. On the one hand, along the axial direction of the push rod 12 (i.e., the length direction of the push rod 12), the limiting part can prevent the push rod 12 from coming out of the mounting groove 112 or being over-inserted. On the other hand, along the radial direction of the push rod 12 (i.e., the direction perpendicular to the axial direction), the limiting part restricts the wobbling, offset, or rotation of the push rod 12 in the mounting groove 112, ensuring that the relative position of the push rod 12 and the push seat 11 is fixed.

[0040] Axial and radial limiting ensures that the push rod 12 and the push seat 11 form a rigid whole. When the push seat 11 slides in the first slide groove 3111, the push rod 12 will not experience axial movement (such as dislodging from the mounting groove 112) or radial offset (such as tilting) due to inertia or force. It can slide strictly synchronously with the push seat 11 along the second slide groove 3121, ensuring that the contact position between the second abutment surface 121 and the operating mechanism 220 is always accurate. This avoids delays or failures in the tripping action caused by the offset of the push rod 12, thus improving the reliability of the tripping. The first limiting part 1121 and the second limiting part 122 provide clear positioning references for the installation of the push rod 12. During assembly, the push rod 12 only needs to be inserted into the mounting groove 112 until the limiting part abuts, without the need for additional measurement or adjustment. This allows for a quick and precise fit between the push rod 12 and the push seat 11.

[0041] As one possible implementation method, such as Figures 1 to 3 As shown, the push seat 11 has a protruding abutment part 113 on the side near the connecting plate 313. The connecting plate 313 is provided with a limiting groove 3131. The abutment part 113 is slidably disposed in the limiting groove 3131. The side wall of the abutment part 113 can abut against the inner wall of the limiting groove 3131.

[0042] It should be noted that the push seat 11 has a protruding abutment 113 (such as a strip protrusion, a block boss or an L-shaped boss) on the side of the push seat 11 close to the connecting plate 313 (i.e. the side facing the connecting plate 313), and the connecting plate 313 has a corresponding limiting groove 3131 (such as a long strip groove) extending along the sliding direction of the push seat 11. The abutment part 113 is embedded in the limiting groove 3131 and can slide synchronously with the push seat 11 along the extension direction of the limiting groove 3131. At the same time, the side wall of the abutment part 113 (such as the left and right side walls) can abut against the inner wall of the limiting groove 3131 (corresponding to its two side walls), forming a lateral constraint during the sliding process. This does not affect the sliding of the release member 10 along the slide groove, and the abutment between the abutment part 113 and the limiting groove 3131 restricts the displacement of the push seat 11 in the sliding direction of the release member 10. Together with the first slide groove 3111 and the second slide groove 3121, it forms a multi-directional guide for the release member 10, and the guiding and limiting functions are more stable and reliable.

[0043] As one possible implementation method, such as Figures 2 to 7 As shown, the first abutment surface 111 is provided with an assembly hole 1111. The electromagnetic release assembly 30 also includes a push rod 33. One end of the push rod 33 has an action part 331, and the other end passes through the assembly hole 1111, the magnetic yoke 31 and the iron core assembly 32. The action part 331 abuts against the first abutment surface 111. When the push rod 33 is driven, it can drive the release member 10 to slide through the action part 331.

[0044] It should be noted that the first abutment surface 111 of the push seat 11 is provided with an assembly hole 1111 (such as a through hole, the size of which should be adapted to the size of the push rod 33); the electromagnetic release assembly 30 also includes a push rod 33, one end of which is provided with an action part 331 (such as a circular end or a plate-shaped boss, the area of ​​which should be larger than the rod body of the push rod 33), and the other end is sequentially inserted into the assembly hole 1111, the magnetic yoke 31 (such as the first mounting groove 3112 on the first mounting plate 311) and the iron core assembly 32 (such as the central through hole of the moving iron core), forming an assembly structure in which "the rod body of the push rod 33 passes through the push seat 11, the magnetic yoke 31 and the iron core assembly 32, and the action part 331 of the push rod 33 abuts against the first abutment surface 111".

[0045] When a short-circuit current occurs in the circuit, the coil 34 generates an induced magnetic field. The iron core assembly 32 moves under the action of electromagnetic force (such as the moving iron core and the stationary iron core attracting each other), which pushes the push rod 33 inside it to move along its axis. The push rod 33 transmits power through the rod body, causing the action part 331 to push the first abutment surface 111 synchronously, thereby driving the entire tripping component 10 (i.e., the push seat 11 and the push rod 12) to slide along the first slide groove 3111 and the second slide groove 3121. Finally, the operation mechanism 220 is triggered to unlock through the second abutment surface 121 of the push rod 12, thereby realizing the tripping function of electromagnetic tripping.

[0046] As one possible implementation method, such as Figure 1 and Figure 2 As shown, the tripping structure 100 also includes an elastic element 40, which is sleeved on the top rod 12. The first end of the elastic element 40 abuts against the side of the mounting groove 112 away from the first abutting surface 111, and the second end abuts against the side of the second mounting plate 312 away from the second abutting surface 121. The elastic element 40 is used to provide a restoring force for the sliding of the tripping member 10 relative to the magnetic yoke 31.

[0047] It should be noted that the release structure 100 also includes an elastic element 40 (such as a compression spring). The elastic element 40 is sleeved on the rod body of the push rod 12 so that the elastic element 40 is distributed along the axial direction of the push rod 12. The first end of the elastic element 40 (i.e. the end near the push seat 11) abuts against the side of the mounting groove 112 away from the first abutting surface 111 (i.e. the groove opening of the mounting groove 112). The second end of the elastic element 40 (i.e. the end near the second mounting plate 312) abuts against the side of the second mounting plate 312 away from the second abutting surface 121 (or the side of the second mounting plate 312 near the first abutting surface 111).

[0048] When the thermal tripping component 20 or the electromagnetic tripping assembly 30 drives the tripping component 10 to slide along the slide groove, the push rod 12 slides, thus compressing the elastic element 40 sleeved on it. At this time, the elastic element 40 is deformed due to compression and can store elastic potential energy. When the external force that triggered the tripping disappears (such as after the fault is cleared, the thermal tripping component 20 cools down and resets, and the electromagnetic force disappears), the elastic element 40 releases its elastic potential energy, generates a reverse thrust, pushes the push rod 12 to drive the push seat 11 to slide in the opposite direction along the slide groove, so that the tripping component 10 returns to the initial position and prepares for the next tripping action.

[0049] The elastic element 40 is sleeved on the push rod 12, using the rod body of the push rod 12 as the mounting carrier, eliminating the need for additional spring brackets or positioning posts and avoiding the space occupied by additional components. At the same time, the axial layout of the elastic element 40 is consistent with the sliding direction of the release element 10, which does not increase the radial or numerical dimensions of the release structure 100 in the push rod 12, ensuring that the release structure 100 is compact as a whole, and also preventing the elastic element 40 from being subjected to lateral force.

[0050] As one possible implementation method, such as Figures 1 to 7 As shown, when the release member 10 is in the normal state, the side of the first mounting plate 311 away from the first abutting surface 111 abuts against the side of the mounting groove 112 away from the second abutting surface 121. When the release member 10 is in the release state, the side of the first mounting plate 311 close to the first abutting surface 111 abuts against the limiting surface 114. The limiting surface 114 is located on the side of the push seat 11 away from the push rod 12, and the limiting surface 114 and the first abutting surface 111 are arranged opposite to each other.

[0051] It should be noted that when there are no overloads, short circuits or other faults in the circuit, the thermal tripping component 20 does not deform, the electromagnetic tripping assembly 30 does not activate, and the tripping component 10 does not slide. At this time, the tripping component 10 is in a normal state. The side of the first mounting plate 311 away from the first abutting surface 111 (or the side of the first mounting plate 311 close to the second abutting surface 121) abuts against the side of the mounting groove 112 away from the second abutting surface 121 (i.e., the bottom of the mounting groove 112), so that the tripping component 10 can be kept in the initial position and avoids unexpected sliding caused by vibration or shaking when there is no fault in the circuit.

[0052] When the circuit experiences overload, short circuit, or other faults, the thermal trip unit 20 or the electromagnetic trip assembly 30 independently drives the trip unit 10 to slide along the slide groove, triggering the operating mechanism 220 to unlock. At this time, the trip unit 10 is in the tripped state. The push seat 11 has a limiting surface 114 on the side away from the push rod 12, and the limiting surface 114 and the first abutting surface 111 are arranged opposite to each other. For example, the first abutting surface 111 faces outward to receive the driving force of the thermal trip unit 20 or the push rod 33, while the limiting surface 114 faces inward to abut against the first mounting plate 311. When the trip unit 10 is driven to switch to the tripped state, the side of the first mounting plate 311 near the first abutting surface 111 abuts against the limiting surface 114, preventing the trip unit 10 from continuing to slide, limiting its maximum sliding stroke, and preventing the trip unit 10 from sliding excessively due to excessive driving force, thus extending the product's service life.

[0053] like Figure 1 As shown in the illustration, this application also provides a circuit breaker 200, including a housing 210, an operating mechanism 220 disposed within the housing 210, and the aforementioned tripping structure 100. The tripping structure 100 is driven to move toward the side closer to the operating mechanism 220, thereby unlocking the operating mechanism 220 and tripping the circuit breaker 200. Since the structure and beneficial effects of the tripping structure 100 have been described in detail in the foregoing embodiments, they will not be repeated here.

[0054] The above description is merely an optional embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0055] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not describe the various possible combinations separately.

Claims

1. A tripping structure, characterized in that, The device includes a tripping component (10) and a thermal tripping component (20) and an electromagnetic tripping assembly (30) that are driven and cooperate with the tripping component (10). The electromagnetic tripping assembly (30) includes a magnetic yoke (31) and an iron core assembly (32) mounted on the magnetic yoke (31). The tripping component (10) is slidably disposed on the magnetic yoke (31), and the tripping component (10) and the iron core assembly (32) are arranged adjacent to each other. The thermal tripping component (20) and the electromagnetic tripping assembly (30) are used to independently drive the tripping component (10) to slide relative to the magnetic yoke (31) so as to drive the operating mechanism (220) to trip and unlock.

2. The trip structure of claim 1, wherein, The magnetic yoke (31) includes a first mounting plate (311) and a second mounting plate (312) arranged opposite to each other, and a connecting plate (313) that is fixedly connected to the first mounting plate (311) and the second mounting plate (312). The opposite ends of the core assembly (32) are respectively mounted on the first mounting plate (311) and the second mounting plate (312). The side of the first mounting plate (311) away from the core assembly (32) is provided with a first sliding groove (3111), and the side of the second mounting plate (312) away from the core assembly (32) is provided with a corresponding second sliding groove (3121). The opposite ends of the release member (10) are respectively slidably disposed in the first sliding groove (3111) and the second sliding groove (3121).

3. The trip structure of claim 2, wherein, The tripping component (10) includes a push seat (11) and a top rod (12) that is limited and installed on the push seat (11). The push seat (11) is slidably disposed in the first slide groove (3111), and the top rod (12) is slidably disposed in the second slide groove (3121). The side of the push seat (11) away from the top rod (12) has a first abutting surface (111), and the end of the top rod (12) away from the push seat (11) has a second abutting surface (121). The deformed end of the thermal tripping component (20) and the electromagnetic tripping assembly (30) abut against the first abutting surface (111) respectively. The push seat (11) can be independently driven to slide in the same direction in the first slide groove (3111) and the top rod (12) can slide in the same direction in the second slide groove (3121) so as to abut against the operating mechanism (220) through the second abutting surface (121) so as to unlock the operating mechanism (220).

4. The trip structure of claim 3, wherein, The push seat (11) is provided with a mounting groove (112) on the side away from the first abutment surface (111), and the end of the push rod (12) away from the second abutment surface (121) is installed in the mounting groove (112); the mounting groove (112) is provided with a first limiting part (1121) for abutting against the push rod (12), and / or, the push rod (12) is provided with a second limiting part (122) for abutting against the mounting groove (112), so as to limit the movement of the push rod (12) relative to the mounting groove (112) in the axial direction and radial direction of the push rod (12).

5. The tripping structure according to claim 4, characterized in that, When the mounting groove (112) is provided with a first limiting part (1121), the first limiting part (1121) is a protrusion or slot provided on the inner wall of the mounting groove (112); when the top rod (12) is provided with a second limiting part (122), the second limiting part (122) is a groove or protrusion provided on the outer wall of the top rod (12).

6. The tripping structure according to claim 3, characterized in that, The push seat (11) has a protruding abutment (113) on the side near the connecting plate (313). The connecting plate (313) is provided with a limiting groove (3131). The abutment (113) is slidably disposed in the limiting groove (3131). The side wall of the abutment (113) can abut against the inner wall of the limiting groove (3131).

7. The tripping structure according to claim 3, characterized in that, The first abutment surface (111) is provided with an assembly hole (1111). The electromagnetic release assembly (30) also includes a push rod (33). One end of the push rod (33) has an action part (331), and the other end passes through the assembly hole (1111), the magnetic yoke (31), and the iron core assembly (32). The action part (331) abuts against the first abutment surface (111). When the push rod (33) is driven, it can drive the release member (10) to slide through the action part (331).

8. The tripping structure according to claim 4, characterized in that, It also includes an elastic element (40), which is sleeved on the top rod (12). The first end of the elastic element (40) abuts against the side of the mounting groove (112) away from the first abutting surface (111), and the second end abuts against the side of the second mounting plate (312) away from the second abutting surface (121). The elastic element (40) is used to provide a restoring force for the sliding of the release member (10) relative to the magnetic yoke (31).

9. The tripping structure according to claim 8, characterized in that, When the release member (10) is in the normal state, the side of the first mounting plate (311) away from the first abutting surface (111) abuts against the side of the mounting groove (112) away from the second abutting surface (121). When the release member (10) is in the release state, the side of the first mounting plate (311) close to the first abutting surface (111) abuts against the limiting surface (114). The limiting surface (114) is located on the side of the push seat (11) away from the top rod (12), and the limiting surface (114) and the first abutting surface (111) are arranged opposite to each other.

10. A circuit breaker, characterized in that, The circuit breaker (200) includes a housing (210), an operating mechanism (220) disposed within the housing (210), and a tripping structure (100) as described in any one of claims 1 to 9. The tripping structure (100) is driven to move toward the side closer to the operating mechanism (220) to unlock the operating mechanism (220) and the circuit breaker (200) is tripped.

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