Operating mechanism and circuit breaker
Patent Information
- Application Number
- CN202522314485.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-30
- Publication Date
- 2026-10-23
- Estimated Expiration
- 2035-10-30
AI Technical Summary
[0016]本申请有益效果包括：
Smart Images
Figure CN224889587U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of low-voltage electrical technology, and more specifically, to an operating mechanism and a circuit breaker. Background Technology
[0002] As a key device for circuit protection, the circuit breaker must quickly disconnect the circuit to ensure the safety of equipment and personnel in the event of overload, short circuit, or other faults. Its working principle is generally as follows: When a fault current occurs, the trip unit inside the circuit breaker responds and drives the tripping mechanism, causing the latch to release. The mechanism seat, under the action of elastic elements such as energy storage springs, moves rapidly, driving the moving contact to complete the opening operation. Simultaneously, the operating handle also automatically switches from the closed position to the open position under the action of elastic force, providing external status indication.
[0003] During the tripping process, the trip latch re-establishes a locking relationship with the locking latch via the connecting rod to ensure that the circuit breaker remains in the tripped state. However, in the motion transmission chain, the connection structure between the connecting rod and the trip latch will have three collinear motion dead points, namely, the hinge point of the trip latch, the hinge point between the connecting rod and the trip latch, and the hinge point between the connecting rod and the operating handle are all on the same straight line, causing the mechanism to fail to form a mechanical self-locking mechanism.
[0004] Existing technology relies on the impact force generated by the release of a spring element within the operating handle, along with the inertia of moving parts, to cause the linkage and trip latch to cross the dead point and re-engage with the locking latch. However, this design has significant drawbacks: the spring element needs to maintain compressed energy storage for a long time during the normal closing state of the circuit breaker. Over time, especially in harsh environments such as humid and dusty conditions, the spring's elasticity deteriorates, resulting in insufficient energy release. Simultaneously, dust accumulation hinders the free movement of the operating handle, causing it to lack sufficient force to break through the dead point during automatic opening. Ultimately, this prevents the trip latch and locking latch from effectively engaging, leading to a failure of the circuit breaker's mechanical interlock, affecting subsequent circuit breaker operations, and reducing product reliability. Utility Model Content
[0005] The purpose of this application is to provide an operating mechanism and circuit breaker that can move the linkage by a reset rod when the elastic force is insufficient, so that the tripping latch can pass through the dead point smoothly, thereby effectively improving the safety of the circuit breaker.
[0006] This application is implemented as follows: In a first aspect, this application provides an operating mechanism, including a trip latch, a connecting rod, an operating handle, and a reset rod; a first end of the connecting rod is hinged to the operating handle, and a second end is connected to the trip latch; the operating handle has a first rotating part for connecting to the circuit breaker housing; the trip latch has a second rotating part for connecting to a mechanism seat inside the circuit breaker; the reset rod has a third rotating part for connecting to the circuit breaker housing; the rotation axes of the first, second, and third rotating parts are parallel and spaced apart; the reset rod extends in a direction perpendicular to the rotation axis; after the circuit breaker trips, during the reset movement of the operating handle, the operating handle pushes the reset rod to move around the third rotating part, and the reset rod moves the connecting rod, causing the trip latch to move around the second rotating part and lock with a locking element provided on the mechanism seat.
[0007] As an optional implementation, during the opening movement of the operating handle, the operating handle pushes the reset rod to move around the third rotating part toward the mechanism seat, and the end of the reset rod abuts against the connecting rod to drive the trip latch to lock with the locking member.
[0008] As an optional implementation, during the closing movement of the operating handle, the connecting rod drives the reset rod to move around the third rotating part towards the first rotating part; the abutting end of the reset rod slides along the extension direction of the connecting rod until it separates from the connecting rod and is suspended in the air.
[0009] As an optional implementation, the angle between the extension direction of the reset rod and the extension direction of the connecting rod abutment portion is less than 90°.
[0010] As an optional implementation, the operating handle is provided with a protrusion extending along the rotation axis; the jumper and the protrusion are respectively located on both sides of the extension direction of the reset rod; the operating handle pushes the reset rod to move around the third rotating part through the protrusion.
[0011] As an optional implementation, the third rotating part is located at the end of the reset rod away from the connecting rod; and the third rotating part is close to the edge of the circuit breaker housing.
[0012] As an optional implementation, the connecting rod has a bend between the first end and the second end; when the mechanism seat moves to the open position and the operating handle is in the closed position, the bend is used to avoid the second rotating part.
[0013] As an optional implementation, the geometric center of the connection between the jump buckle and the connecting rod forms a first line with the geometric center of the second rotating part; the geometric centers at both ends of the connecting rod form a second line. When the angle between the first line and the second line is ±10°, the reset rod moves the jump buckle to lock with the locking member.
[0014] As an optional implementation, the jump buckle is provided with a sliding groove, and the second end of the connecting rod is connected to the sliding groove; when the reset rod moves the connecting rod to make the jump buckle move away from the dead point position generated by the hinge between the jump buckle and the mechanism seat and the collinearity of the two ends of the connecting rod, the second end of the connecting rod slides from one end of the sliding groove to the other end.
[0015] Secondly, this application provides a circuit breaker, including a housing, the aforementioned operating mechanism, a mechanism seat, and a locking element disposed on the mechanism seat; the operating mechanism and the mechanism seat are installed inside the housing; during the opening movement, the operating handle of the operating mechanism pushes the reset rod to move around the third rotating part, and the reset rod moves the connecting rod to make the trip latch move around the second rotating part and lock with the locking element.
[0016] The beneficial effects of this application include: The operating mechanism and circuit breaker provided in this application effectively solve the motion dead point problem caused by the collinearity of the connecting rod, trip latch, and operating handle hinge point in traditional structures by setting a rotatable reset rod on the circuit breaker housing, which actively moves the connecting rod during the operation handle opening process. This design does not rely on the impact force and motion inertia of the operating handle's built-in spring to overcome the dead point, avoiding the risk of action failure caused by the elastic decay of the spring due to long-term compression and dust accumulation hindering the movement of the handle. The reset rod uses the housing as a fixed fulcrum, providing a stable and reliable external driving force to ensure that the trip latch and locking latch can accurately and reliably re-lock under various operating conditions, thereby achieving effective mechanical retention after the circuit breaker is opened. This significantly improves the operational reliability, environmental adaptability, and long-term stability of the operating mechanism, fundamentally reducing the safety hazards caused by mechanical interlock failure and enhancing the overall safety performance of the circuit breaker. Attached Figure Description
[0017] 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.
[0018] Figure 1 This is a schematic diagram of the circuit breaker according to an embodiment of this application; Figure 2 This is a second schematic diagram of the structure of the operating mechanism in an embodiment of this application; Figure 3 This is the third schematic diagram of the structure of the operating mechanism in the embodiments of this application; Figure 4 This is the fourth schematic diagram of the operating mechanism in the embodiments of this application; Figure 5This is the fifth schematic diagram of the operating mechanism in the embodiments of this application.
[0019] Icons: 100-Jump buckle; 101-Linking rod; 102-Operating handle; 103-Reset rod; 104-First end; 105-Second end; 106-Housing; 107-First rotating part; 108-Mechanism seat; 109-Second rotating part; 110-Third rotating part; 111-Abutting end; 112-Protrusion; 113-Bending part; 114-Slide groove; 115-Locking element; 116-Locking structure. Detailed Implementation
[0020] 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, and 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.
[0021] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0022] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0023] 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 the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0024] Existing technology relies on the impact force generated by the release of the spring element inside the operating handle 102 and the inertia of the moving parts to cause the connecting rod 101 and the trip latch 100 to cross the dead point and re-engage with the latch. However, this design has obvious defects: the spring element needs to maintain compressed energy for a long time in the normal closing state of the circuit breaker. Over time, especially in harsh environments such as humid and dusty conditions, the elastic performance of the spring will decay, resulting in insufficient energy release. At the same time, dust accumulation will hinder the free movement of the operating handle 102, thus making it lack sufficient impact force to break through the dead point during the automatic opening process. Ultimately, this will cause the trip latch 100 and the latch to fail to engage effectively, causing the mechanical interlock of the circuit breaker to fail, affecting the next operation of the circuit breaker, and reducing the reliability of the product.
[0025] To address the aforementioned technical problems, embodiments of this application provide an operating mechanism and a circuit breaker.
[0026] Reference Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, the operating mechanism provided in this embodiment includes a trip latch 100, a connecting rod 101, an operating handle 102, and a reset rod 103; the first end 104 of the connecting rod 101 is hinged to the operating handle 102, and the second end 105 is connected to the trip latch 100; the operating handle 102 is provided with a first rotating part 107 for connecting to the circuit breaker housing 106; the trip latch 100 is provided with a second rotating part 109 for connecting to the mechanism seat 108 inside the circuit breaker; the reset rod 103 is provided with a part connecting to the circuit breaker housing 106. The third rotating part 110 is connected; the rotation axes of the first rotating part 107, the second rotating part 109 and the third rotating part 110 are parallel and spaced apart; the reset rod 103 extends in the direction perpendicular to the rotation axis; after the circuit breaker trips and opens, during the reset movement of the operating handle 102, the operating handle 102 pushes the reset rod 103 to move around the third rotating part 110, the reset rod 103 moves the connecting rod 101, and drives the trip latch 100 to move around the second rotating part 109 and lock with the locking member 115 provided on the mechanism base 108.
[0027] Among them, reference Figure 5 As shown, the buckle 100 is provided with a locking structure 116, and the locking fastener 115 is provided with a snap-fit groove corresponding to the locking structure 116.
[0028] It should be noted that when the circuit breaker experiences an overload or short circuit fault, the operating mechanism provided in this application embodiment, under the action of the energy storage spring, drives the moving contact to quickly open, and the operating handle 102 automatically moves from the closed position to the open position under the action of elastic force. During this process, the operating handle 102 rotates through its first rotating part 107 and pushes the connecting rod 101 hinged to it to move. The connecting rod 101 then drives the trip latch 100 to rotate around its second rotating part 109, thereby realizing the re-locking of the trip latch 100 with the latch to maintain the open state. To overcome the mechanical dead point problem caused by the collinearity of the connecting rod 101 and the trip latch 100 during the movement of the traditional structure, this application provides a reset rod 103. The reset rod 103 is rotatably mounted on the circuit breaker housing 106 through the third rotating part 110. When the operating handle 102 is in the opening movement, it is pushed by the operating handle 102 and swings around the third rotating part 110. During the swing, the reset rod 103 actively moves the connecting rod 101 to provide it with additional driving force, assisting the connecting rod 101 and the trip latch 100 to smoothly pass the movement dead point and ensuring that the trip latch 100 and the latch are reliably locked.
[0029] It should be noted that, in this embodiment, the reset rod 103 is rotatably connected to the circuit breaker housing 106 via the third rotating part 110. This means that the reset rod 103 is installed at a specific position on the housing 106 and can only rotate around its own axis of rotation within a limited angle, but cannot move freely or detach. Therefore, this embodiment makes the reset rod 103 a stable and reliable reset structure.
[0030] When the operating handle 102 moves during the opening process, it pushes one end of the reset lever 103. Since its rotation center is fixed to the housing 106, the reset lever 103 swings around this fulcrum, and its other end generates a directional pulling force that precisely acts on the connecting rod 101, thereby actively applying external force to help the connecting rod 101 and the trip latch 100 overcome the dead point of movement. This rotating connection method fixed to the housing 106 in this embodiment not only ensures the repeatability and stability of the reset lever 103's action, but also improves the reliability of the entire operating mechanism under various environmental conditions.
[0031] The operating mechanism provided in this application embodiment effectively solves the motion dead point problem caused by the collinearity of the connecting rod 101, the trip latch 100, and the hinge point of the operating handle 102 during the opening process of the circuit breaker housing 106 by setting a rotatable reset rod 103 on the circuit breaker housing 106. This design does not rely on the impact force and motion inertia of the built-in spring of the operating handle 102 to overcome the dead point, avoiding the risk of action failure caused by the elastic decay of the spring due to long-term compression and the obstruction of the handle movement by dust accumulation. The reset rod 103 uses the housing 106 as a fixed fulcrum to provide a stable and reliable external driving force, ensuring that the trip latch 100 and the latch can be accurately and reliably re-locked under various working conditions, thereby realizing effective mechanical retention and clear status indication after the circuit breaker is opened. This significantly improves the action reliability, environmental adaptability, and long-term stability of the operating mechanism, fundamentally reduces the safety hazards caused by mechanical interlock failure, and enhances the overall safety performance of the circuit breaker.
[0032] Furthermore, the reset rod 103 in this embodiment includes a plastic rod or a metal rod. The reset rod 103 has a certain elastic deformation capability.
[0033] Reference Figure 2 , Figure 3 as well as Figure 4 As shown, in an optional implementation, during the opening movement of the operating handle 102, the operating handle 102 pushes the reset rod 103 to move around the third rotating part 110 toward the mechanism seat 108. The end of the reset rod 103 abuts against the connecting rod 101, thereby driving the trip latch 100 to lock with the locking member 115.
[0034] It should be noted that the reset lever 103 is rotatably connected to the circuit breaker housing 106 via the third rotating part 110, forming a stable swing lever mechanism. When the circuit breaker trips due to a fault, the operating handle 102 moves from the closed position to the open position under the drive of elastic elements such as the energy storage spring. During this process, the operating handle 102 directly pushes the middle part of the reset lever 103, causing it to swing around the third rotating part 110 towards the mechanism seat 108. The other end of the reset lever 103 moves accordingly and abuts against the connecting rod 101, thereby transmitting the thrust to the connecting rod 101. Under the action of this thrust, the connecting rod 101 drives the trip latch 100 to rotate around its second rotating part 109, causing the trip latch 100 to re-establish a locking connection with the locking element 115 on the mechanism seat 108. Since the motion power of the reset rod 103 comes from the overall displacement of the operating handle 102 rather than the instantaneous release of the internal spring, and its rotation fulcrum is fixed to the housing 106, the structure is stable and the force transmission path is clear. Therefore, it can continuously and reliably provide auxiliary driving force to the linkage 101-trip latch 100 transmission chain during the opening process, effectively helping the mechanism to smoothly cross the motion dead point of the three collinear points, ensuring that the latch action is in place, and realizing mechanical self-locking and state maintenance after the circuit breaker is opened.
[0035] Reference Figure 2 , Figure 3 As shown, in one optional implementation, during the closing movement of the operating handle 102, the connecting rod 101 drives the reset rod 103 to move around the third rotating part 110 toward the first rotating part 107; the abutting end 111 of the reset rod 103 slides along the extension direction of the connecting rod 101 until it separates from the connecting rod 101 and is suspended in the air.
[0036] It should be noted that when the circuit breaker performs a closing operation, the operating handle 102 rotates around its first rotating part 107 from the open position to the closed position, driving the connecting rod 101 hinged to it to move. During the rotation, the connecting rod 101 pushes the abutting end 111 of the reset rod 103, causing the reset rod 103 to swing around its third rotating part 110 towards the direction closer to the first rotating part 107 of the operating handle 102, that is, in the opposite direction to the movement path during the opening. During this process, the abutting end 111 of the reset rod 103 slides relative to the extension direction of the connecting rod 101. As the operating handle 102 continues to close the circuit, the reset rod 103 is gradually driven to a specific position, and its abutting end 111 disengages from the connecting rod 101, returning to the suspended standby state, and no longer exerts force on the connecting rod 101. This design achieves automatic reset and decoupling of the reset lever 103 during the closing process: it does not affect the smoothness of the normal closing action, and ensures that the reset lever 103 is in the correct initial position before the next opening. This linkage and separation mechanism allows the reset lever 103 to actively participate in the transmission only during the opening process, providing the auxiliary driving force required to cross the dead point, while passively following and automatically disengaging during the closing process to avoid interference, thereby ensuring the coordination and reliability of the operating mechanism in both the opening and closing strokes.
[0037] Reference Figure 2 , Figure 3 As shown, in one optional implementation, the angle between the extension direction of the reset rod 103 and the extension direction of the abutting portion of the connecting rod 101 is less than 90°.
[0038] It should be noted that the angle between the extension direction of the reset rod 103 and the extension direction of its contacting link 101 is less than 90°, meaning they intersect at an acute angle. This structural design allows the reset rod 103 to exert a more efficient force transmission on the link 101 during the opening process: when the reset rod 103 swings around the third rotating part 110 and pushes the link 101, the direction of the applied force is closer to the direction of movement of the link 101, reducing ineffective force components perpendicular to the movement path, thereby improving the effective utilization rate of the driving force. This acute angle arrangement not only helps to reduce frictional resistance and mechanical loss during transmission, but also enables reliable driving of the link 101 with a smaller pushing force, ensuring that the trip latch 100 smoothly overcomes the dead point and locks with the latch. At the same time, this angle design is beneficial to optimizing the spatial layout of the internal parts of the operating mechanism, allowing the reset rod 103 and the link 101 to maintain a stable contact and disengagement trajectory during the opening push and closing sliding separation processes, further improving the smoothness and reliability of the mechanism's operation.
[0039] Reference Figure 2 , Figure 3As shown, in one optional implementation, the operating handle 102 is provided with a protrusion 112 extending along the rotation axis; the jumper 100 and the protrusion 112 are respectively located on both sides of the extension direction of the reset rod 103; the operating handle 102 pushes the reset rod 103 to move around the third rotating part 110 through the protrusion 112.
[0040] In an optional embodiment of this application, the operating handle 102 is provided with a protrusion 112 extending along its rotation axis. The protrusion 112 and the trip latch 100 are located on opposite sides of the extension direction of the reset rod 103, forming a spatial linkage layout. When the circuit breaker trips, the operating handle 102 rotates around its first rotating part 107, and the protrusion 112 moves accordingly and first contacts the middle part of the reset rod 103. The pushing action of the protrusion 112 directly pushes the reset rod 103, causing it to swing around the third rotating part 110 fixed to the circuit breaker housing 106 toward the mechanism seat 108. Since the protrusion 112 moves synchronously with the operating handle 102, its thrust is stable and synchronized with the tripping action, ensuring that the reset rod 103 responds in time and drives the connecting rod 101 to move, thereby driving the trip latch 100 to complete the locking with the latch.
[0041] Reference Figure 2 , Figure 3 as well as Figure 4 As shown, in one optional embodiment, the third rotating part 110 is located at the end of the reset rod 103 away from the connecting rod 101; and the third rotating part 110 is close to the edge of the circuit breaker housing 106.
[0042] It should be noted that the third rotating part 110 of the reset lever 103 is located at the end furthest from the connecting rod 101 and close to the edge of the circuit breaker housing 106. This arrangement makes the reset lever 103 a lever structure with the far end as the fulcrum and the near end as the action end. When the operating handle 102 pushes the reset lever 103 through the protrusion 112, the thrust is applied to the side near the free end. Since the lever arm of the force application point of the protrusion 112 is short and the lever arm of the force application point of the connecting rod 101 driven by the contact end 111 is long, the operating handle 102 can obtain a large stroke of the contact end 111 with a small rotation angle, which meets the ±10° rotation angle of the connecting rod required for the reset of the trip button 100, thus improving the transmission efficiency and response sensitivity. At the same time, placing the third rotating part 110 close to the edge of the housing 106 makes full use of the space in the inner edge area of the circuit breaker, avoids interference with the main transmission components (such as the connecting rod 101, trip button 100, mechanism seat 108, etc.), and is conducive to the compact design of the overall mechanism. In addition, this arrangement increases the length of the reset rod 103, thereby giving the reset rod 103 a certain degree of elasticity, reducing the impact on the mechanism during movement, and further improving the stability and durability of the mechanism in long-term use.
[0043] Reference Figure 3 , Figure 4 As shown, in an optional embodiment, the connecting rod 101 has a bend 113 between the first end 104 and the second end 105; when the mechanism seat 108 moves to the open position and the operating handle 102 is in the closed position, the bend 113 is used to avoid the second rotating part 109.
[0044] In an optional embodiment of this application, a bend 113 is provided between the first end 104 and the second end 105 of the connecting rod 101. This structural design has a clear mechanical avoidance function. When the circuit breaker is in the fault tripping process, the mechanism base 108 moves rapidly to the tripping position under the action of the energy storage spring. At this time, the operating handle 102 has not yet started to move or is still in the closing position. The connecting rod 101 rotates under the drive of the mechanism base 108, and its movement path may cause spatial interference with the second rotating part 109 on the trip latch 100. By providing a bend 113 on the connecting rod 101, sufficient avoidance space can be provided for the second rotating part 109 under this working condition, preventing the connecting rod 101 from colliding or jamming with the trip latch 100 or the mechanism base 108, and ensuring that the mechanism base 108 can independently and smoothly complete the rapid tripping action.
[0045] As an optional implementation, the geometric center of the connection between the jump buckle 100 and the connecting rod 101 forms a first line with the geometric center of the second rotating part 109; the geometric centers at both ends of the connecting rod 101 form a second line. When the angle between the first line and the second line is ±10°, the reset rod 103 moves the jump buckle 100 to lock with the locking member 115.
[0046] It should be noted that when the geometric center of the connection between the jump buckle 100 and the connecting rod 101 forms a first line with the geometric center of the second rotating part 109, and the geometric centers of the hinge points at both ends of the connecting rod 101 form a second line, and the included angle between these two lines is within the critical range of ±10°, it indicates that the transmission mechanism of the connecting rod 101 and the jump buckle 100 has moved to or is close to the motion dead point region where the three points are collinear. At this time, the transmission efficiency drops sharply, and the lock is very likely to fail to complete the locking due to insufficient driving force. This application provides a reset rod 103 to actively move the connecting rod 101 at this critical phase, applying additional driving force to ensure that the jump buckle 100 can overcome the dead point resistance, continue to rotate, and reliably lock with the locking member 115.
[0047] Reference Figure 5As shown, in one optional implementation, the jump buckle 100 is provided with a slide groove 114, and the second end 105 of the connecting rod 101 is connected to the slide groove 114; when the reset rod 103 moves the connecting rod 101 to make the jump buckle 100 move away from the hinge point between the jump buckle 100 and the mechanism seat 108 and the dead point position generated by the collinearity of the two ends of the connecting rod 101, the second end 105 of the connecting rod 101 slides from one end of the slide groove 114 to the other end.
[0048] It should be noted that the trip latch 100 is provided with a sliding groove 114, and the second end 105 of the connecting rod 101 is slidably connected to the sliding groove 114, forming a sliding hinge structure. When the circuit breaker trips, the operating handle 102 pushes the reset rod 103, which in turn moves the connecting rod 101, causing the trip latch 100 to rotate around its second rotating part 109. During the movement, when the first end 104, the second end 105, and the second rotating part 109 are close to or at a dead point where the three points are collinear, the traditional rigid connection is prone to jamming due to insufficient torque, causing the trip latch 100 to be unable to continue moving to complete the locking with the latch. In this design, the second end 105 of the connecting rod 101 can slide within the groove 114, allowing the connection between the connecting rod 101 and the jump buckle 100 to have a certain degree of freedom. As the driving force applied by the reset rod 103 acts, the connecting rod 101 pushes the jump buckle 100 while its end slides along the groove 114 from one end to the other. This sliding process changes the direction and lever arm of the force of the connecting rod 101 relative to the jump buckle 100, effectively breaking the mechanical balance at the dead point and helping the mechanism smoothly overcome the dead point. This sliding engagement, combined with the active drive of the reset rod 103, not only reduces the dependence on the impact force of the operating handle 102 but also significantly improves the smoothness and reliability of the transmission, ensuring that the jump buckle 100 can accurately and stably complete the locking with the latch under various working conditions.
[0049] Reference Figure 1 As shown, the circuit breaker provided in this application embodiment includes a housing 106, the aforementioned operating mechanism, a mechanism base 108, and a locking member 115 disposed on the mechanism base 108; the operating mechanism and the mechanism base 108 are installed inside the housing 106; during the opening movement, the operating handle 102 of the operating mechanism pushes the reset rod 103 to move around the third rotating part 110, and the reset rod 103 moves the connecting rod 101 to make the trip latch 100 move around the second rotating part 109 and lock with the locking member 115.
[0050] The circuit breaker provided in this application significantly improves the reliability and safety of the tripping action by integrating the optimized operating mechanism into the housing 106 and cooperating with the mechanism base 108 and the locking element 115. In the event of an overload or short-circuit fault, the mechanism base 108 causes the moving contact to quickly separate, and the operating handle 102 moves to the tripping position under elastic force, pushing the reset rod 103 to swing around its third rotating part 110 fixed to the housing 106. The reset rod 103 then actuates the connecting rod 101, driving the trip latch 100 to rotate around the second rotating part 109, achieving reliable locking with the locking element 115. This design, through the active transmission mechanism of the reset rod 103, effectively overcomes the motion dead point problem caused by the collinearity of the connecting rod 101, the trip latch 100, and the handle hinge point in traditional structures, avoiding the performance degradation and environmental sensitivity risks caused by relying on the impact force and motion inertia of the handle's built-in spring. The entire operating mechanism operates stably and transmits force efficiently. In particular, under harsh working conditions such as spring aging and dust accumulation, it can still ensure that the jump buckle 100 can successfully cross the dead point and complete the mechanical self-locking, thereby greatly improving the long-term reliability, environmental adaptability and operational safety of the product.
[0051] The above description is merely a preferred 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.
Claims
1. An operating mechanism, characterized in that, The circuit breaker includes a trip latch (100), a connecting rod (101), an operating handle (102), and a reset rod (103); the first end (104) of the connecting rod (101) is hinged to the operating handle (102), and the second end (105) is connected to the trip latch (100); the operating handle (102) has a first rotating part (107) for connecting to the circuit breaker housing (106); the trip latch (100) has a second rotating part (109) for connecting to the mechanism seat (108) inside the circuit breaker; the reset rod (103) has a third rotating part (109) for connecting to the circuit breaker housing (106). 110); the rotation axes of the first rotating part (107), the second rotating part (109) and the third rotating part (110) are parallel and spaced apart; the reset rod (103) extends in the direction perpendicular to the rotation axis; after the circuit breaker trips and opens, during the reset movement of the operating handle (102), the operating handle (102) pushes the reset rod (103) to move around the third rotating part (110), the reset rod (103) moves the connecting rod (101), and drives the trip buckle (100) to move around the second rotating part (109) and lock with the locking member (115) provided on the mechanism seat (108).
2. The operating mechanism according to claim 1, characterized in that, During the opening movement of the operating handle (102), the operating handle (102) pushes the reset rod (103) to move around the third rotating part (110) toward the mechanism seat (108). The end of the reset rod (103) abuts against the connecting rod (101) to drive the trip buckle (100) to lock with the locking member (115).
3. The operating mechanism according to claim 2, characterized in that, During the closing movement of the operating handle (102), the connecting rod (101) drives the reset rod (103) to move around the third rotating part (110) toward the first rotating part (107); the abutting end (111) of the reset rod (103) slides along the extension direction of the connecting rod (101) until it separates from the connecting rod (101) and is suspended in the air.
4. The operating mechanism according to claim 1, characterized in that, The angle between the extension direction of the reset rod (103) and the extension direction of the contact portion of the connecting rod (101) is less than 90°.
5. The operating mechanism according to claim 1, characterized in that, The operating handle (102) is provided with a protrusion (112) extending along the rotation axis; the jump buckle (100) and the protrusion (112) are respectively located on both sides of the extension direction of the reset rod (103); the operating handle (102) pushes the reset rod (103) to move around the third rotating part (110) through the protrusion (112).
6. The operating mechanism according to any one of claims 1-5, characterized in that, The third rotating part (110) is located at the end of the reset rod (103) away from the connecting rod (101); and the third rotating part (110) is close to the edge of the circuit breaker housing (106).
7. The operating mechanism according to any one of claims 1-5, characterized in that, The connecting rod (101) has a bend (113) between its first end (104) and second end (105); when the mechanism seat (108) moves to the open position and the operating handle (102) is in the closed position, the bend (113) is used to avoid the second rotating part (109).
8. The operating mechanism according to any one of claims 1-5, characterized in that, The geometric center of the connection between the jump buckle (100) and the connecting rod (101) forms a first line with the geometric center of the second rotating part (109); the geometric centers at both ends of the connecting rod (101) form a second line. When the angle between the first line and the second line is ±10°, the reset rod (103) moves the jump buckle (100) to lock with the locking member (115).
9. The operating mechanism according to any one of claims 1-5, characterized in that, The jump buckle (100) is provided with a slide groove (114), and the second end (105) of the connecting rod (101) is connected to the slide groove (114). When the reset rod (103) moves the connecting rod (101) to make the jump buckle (100) move away from the hinge point between the jump buckle (100) and the mechanism seat (108) and the dead point position generated by the collinearity of the two ends of the connecting rod (101), the second end (105) of the connecting rod (101) slides from one end of the slide groove (114) to the other end.
10. A circuit breaker, characterized in that, The device includes a housing (106), an operating mechanism as described in any one of claims 1-9, a mechanism seat (108), and a locking element (115) disposed on the mechanism seat (108); the operating mechanism and the mechanism seat (108) are installed inside the housing (106); during the opening movement, the operating handle (102) of the operating mechanism pushes the reset rod (103) to move around the third rotating part (110), and the reset rod (103) moves the connecting rod (101) to make the trip latch (100) move around the second rotating part (109) and lock with the locking element (115).