Operating mechanism and circuit breaker

Abstract

The invention relates to the technical field of low-voltage electric appliances, in particular to an operating mechanism and a circuit breaker, comprising a jump fastener, a connecting rod, a mechanism seat and an operating handle, the operating handle is connected with the circuit breaker shell through the first rotating part, and the mechanism seat is connected with the circuit breaker shell through the second rotating part; the jump fastener comprises a third rotating part and a linear guide part which are positioned on the same straight line; one end of the connecting rod is connected with the third rotating part; a sliding structural part matched with the linear guide part is arranged on the mechanism seat; and during fault tripping, the tripping piece moves clockwise around the third rotating part, and the sliding structural piece moves in the direction away from the third rotating part along the linear guide part. According to the invention, the self-adaptive adjustment of the connection distance is realized through the sliding structure, the maximum opening distance can be realized, the efficient power transmission can be ensured, and the miniaturization design of the circuit breaker is convenient to realize.

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] In the internal structure of a circuit breaker, the operating mechanism is the core component for realizing closing, holding, and opening actions. Its performance directly affects the reliability, response speed, and breaking capacity of the circuit breaker. A typical operating mechanism usually includes components such as an operating handle, linkage mechanism, trip fastener, locking fastener, mechanism seat, and energy storage element. Among them, the trip fastener, as the key component for triggering the opening action, is generally connected through two rotating holes: one rotating hole is hinged to the linkage for linkage with the operating handle to realize manual or electric closing and opening; the other rotating hole is hinged to the mechanism seat, forming a rotation fulcrum, allowing the trip fastener to rotate under the action of a trip signal and release the locking state.

[0003] When a circuit fault occurs, the trip unit drives the locking element to disengage from the tripping element. At this time, the elastic element pushes the mechanism seat, causing the moving contact assembly to quickly separate, completing the tripping. However, in existing designs, the distance between the two rotating holes on the tripping element is a fixed value. If the distance between the two rotating holes is too small, the rotation stroke of the mechanism seat is limited after tripping, causing the moving contact to fail to reach the designed maximum opening distance, affecting the arc elongation effect and reducing the arc extinguishing capacity of the arc-extinguishing chamber. Conversely, if the distance between the two rotating holes is too large, the rotation radius of the tripping element will be too large after tripping, or it may interfere with other components, and it will also increase the space occupied by the overall mechanism, which is not conducive to the miniaturization design of the circuit breaker. Summary of the Invention

[0004] The purpose of this application is to provide an operating mechanism and a circuit breaker that achieves adaptive adjustment of the connection spacing through a sliding structure, which not only achieves the maximum opening distance but also ensures efficient power transmission and facilitates the miniaturization design of the circuit breaker.

[0005] This application is implemented as follows: In a first aspect, this application provides an operating mechanism including a trip fastener, a connecting rod, a mechanism base, and an operating handle; the operating handle is connected to the circuit breaker housing via a first rotating part, and the mechanism base is connected to the circuit breaker housing via a second rotating part; the rotation axes of the first rotating part and the second rotating part are parallel and spaced apart; the trip fastener includes a third rotating part and a linear guide part located on the same straight line; one end of the connecting rod is connected to the third rotating part, and the other end is connected to the operating handle; the mechanism base is provided with a sliding structural member that cooperates with the linear guide part; when a fault trip occurs, the trip fastener rotates clockwise around the third rotating part, and the sliding structural member moves along the linear guide part in a direction away from the third rotating part.

[0006] As an optional implementation, after a fault trip, when the operating handle moves to the open position, the sliding structure moves along the linear guide portion toward the third rotating portion.

[0007] As an optional implementation, when the operating handle moves to the closed position, the sliding structure abuts against the end of the linear guide near the third rotating part to push the moving contact provided on the mechanism base to close.

[0008] As an optional implementation, the linear guide includes a slot; the sliding structure includes a sliding column disposed on the mechanism seat; the sliding column is inserted into the slot.

[0009] As an optional implementation, the sliding column includes a circular column with a diameter consistent with the width of the slot; the slot is provided at least at the end near the third rotating part with an arc-shaped abutment portion for abutting against the circular column.

[0010] As an optional implementation, the end of the slot away from the third rotating part has an opening.

[0011] As an optional implementation, the geometric center of the connecting end of the link and the operating handle forms a reference line with the geometric center of the sliding structure, and the geometric center of the third rotating part is located on the same side of the reference line as the second rotating part.

[0012] As an optional implementation, a limiting platform is provided on the mechanism base; a first abutment surface is provided on the limiting platform; after a fault trip, the tripping fastener rotates clockwise around the third rotating part, and the sliding structural member moves away from the third rotating part along the linear guide part; when the moving contact of the circuit breaker moves to the open position, the first abutment surface is used to prevent the tripping fastener from continuing to rotate clockwise around the third rotating part; when the operating handle moves to the open position, the third rotating part passes between the second rotating part and the sliding structural member and moves towards the operating handle.

[0013] As an optional implementation, the limiting platform is provided with a second abutment surface adjacent to the first abutment surface; the second abutment surface is used to prevent the third rotating part from moving to the side of the reference line away from the second rotating part.

[0014] Secondly, this application provides a circuit breaker, including a housing and an operating mechanism mounted on the housing; a locking member for engaging with a tripping member is mounted on the mechanism base; when the locking member is disengaged from the tripping member, the sliding structure of the operating mechanism moves along the linear guide portion in a direction away from the third rotating portion.

[0015] The beneficial effects of this application include: The operating mechanism and circuit breaker of this application, by adopting a trip fastener structure with a third rotating part and a linear guide part, in conjunction with a sliding structural component on the mechanism base, achieves a composite transmission of rotation and linear motion during tripping, effectively eliminating the limitation on the mechanism stroke imposed by the distance between the two holes of the trip fastener in traditional designs. This technical solution significantly increases the rotational stroke of the mechanism base during fault tripping without increasing the overall spatial layout, ensuring that the moving contact reaches the designed opening distance, which is beneficial for sufficient arc elongation and effective extinguishing, improving the breaking capacity and arc extinguishing performance of the circuit breaker; at the same time, it optimizes the force transmission path, improves tripping sensitivity and response speed, reduces operating force requirements, and enhances operational reliability. Furthermore, this structural design is simple and easy to assemble, facilitating the miniaturization, high reliability, and mass production of the circuit breaker operating mechanism, and has good engineering application value. 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 This is one of the structural schematic diagrams of the circuit breaker according to an embodiment of this application; Figure 2 This is a second schematic diagram of the circuit breaker structure according to an embodiment of this application; Figure 3 This is the third schematic diagram of the circuit breaker in the embodiments of this application; Figure 4 This is the fourth schematic diagram of the circuit breaker in the embodiments of this application; Figure 5 This is the fifth schematic diagram of the circuit breaker in the embodiments of this application; Figure 6 This is one of the structural schematic diagrams of the jump fastener of the operating mechanism in the embodiments of this application; Figure 7 This is a second schematic diagram of the structure of the jump fastener of the operating mechanism in an embodiment of this application.

[0018] Icons: 100-Housing; 101-Clutch; 102-Linking rod; 103-Mechanism seat; 104-Operating handle; 105-First rotating part; 106-Second rotating part; 107-Third rotating part; 108-Linear guide part; 109-Sliding structural component; 110-Slot; 111-Arc-shaped abutment part; 112-Opening; 113-Baseline connection line; 114-Limiting platform; 115-First abutment surface; 116-Second abutment surface; 117-Locking component. 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, 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] In the internal structure of a circuit breaker, the operating mechanism is the core component for realizing closing, holding, and opening actions. Its performance directly affects the reliability, response speed, and breaking capacity of the circuit breaker. A typical operating mechanism usually includes components such as an operating handle 104, a linkage mechanism 102, a trip fastener 101, a locking element 117, a mechanism base 103, and an energy storage element. Among them, the trip fastener 101, as a key component for triggering the opening action, is generally connected through two rotating holes: one rotating hole is hinged to the linkage 102 for linkage with the operating handle 104 to realize manual or electric closing and opening; the other rotating hole is hinged to the mechanism base 103, forming a rotation fulcrum, allowing the trip fastener 101 to rotate under the action of a trip signal and release the locking state.

[0024] When a circuit fault occurs, the trip unit drives the locking element 117 to disengage from the tripping element 101. At this time, the elastic element pushes the mechanism seat 103 to quickly separate the moving contact assembly, completing the tripping. However, in the existing design, the distance between the two rotating holes on the tripping element 101 is a fixed value. If the distance between the two rotating holes is too small, the rotation stroke of the mechanism seat 103 is limited after tripping, causing the moving contact to fail to reach the designed maximum opening distance, affecting the arc elongation effect and reducing the arc extinguishing capacity of the arc-extinguishing chamber; conversely, if the distance between the two rotating holes is too large, the rotation radius of the tripping element will be too large after tripping, or it may interfere with other components, and it will also increase the space occupied by the overall mechanism, which is not conducive to the miniaturization design of the circuit breaker.

[0025] To address the aforementioned technical problems, this application provides an operating mechanism and a circuit breaker.

[0026] Reference Figure 1 , Figure 2 as well as Figure 3 As shown, the operating mechanism provided in this embodiment includes a trip fastener 101, a connecting rod 102, a mechanism base 103, and an operating handle 104. The operating handle 104 is connected to the circuit breaker housing 100 via a first rotating part 105, and the mechanism base 103 is connected to the circuit breaker housing 100 via a second rotating part 106. The rotation axes of the first rotating part 105 and the second rotating part 106 are parallel and spaced apart. The trip fastener 101 includes a third rotating part 107 and a linear guide part 108 located on the same straight line. One end of the connecting rod 102 is connected to the third rotating part 107, and the other end is connected to the operating handle 104. The mechanism base 103 is provided with a sliding structural member 109 that cooperates with the linear guide part 108. When a fault trip occurs, the trip fastener 101 rotates clockwise around the third rotating part 107, and the sliding structural member 109 moves along the linear guide part 108 in a direction away from the third rotating part 107. Figure 1 It is in the closed state. Figure 2 This is a schematic diagram of the moving contact opening after tripping. At this time, the operating handle 104 is still in the closed position.

[0027] It should be noted that, by optimizing the structural design of the trip fastener 101, this embodiment of the application changes the traditional layout of the double rotating holes in the trip fastener 101. It adopts a structure combining the third rotating part 107 and the linear guide part 108 located on the same straight line, allowing the trip fastener 101 to not only have rotational freedom during tripping but also to generate sliding displacement along the linear guide part 108. During operation, when the circuit breaker malfunctions, the trip fastener 101 is driven to rotate clockwise around the third rotating part 107. Simultaneously, its linear guide part 108 cooperates with the sliding structure 109 on the mechanism base 103. The sliding structure 109 moves away from the third rotating part 107 along a straight line, thereby allowing the mechanism base 103 to have a larger rotation angle. During this process, the elastic element releases energy, driving the moving contact to quickly separate, achieving reliable tripping. This design effectively amplifies the rotational stroke of the mechanism base 103 by coupling rotation with linear guided motion, thereby improving the contact opening distance and breaking capacity. At the same time, it avoids the problem of insufficient stroke or wasted space caused by the fixed distance between the two holes of the jump fastener 101, improves the action sensitivity and breaking reliability of the operating mechanism, and is conducive to the miniaturized integrated design of the circuit breaker.

[0028] This embodiment employs a trip fastener 101 structure with a third rotating part 107 and a linear guide part 108, in conjunction with a sliding structural member 109 on the mechanism base 103, to achieve a composite transmission of rotation and linear motion during tripping. This effectively eliminates the limitation on the mechanism stroke imposed by the distance between the two holes of the trip fastener 101 in traditional designs. Without increasing the overall spatial layout, this technical solution significantly increases the rotational stroke of the mechanism base 103 during fault tripping, ensuring the moving contact reaches the designed opening distance. This facilitates sufficient arc elongation and effective extinguishing, improving the circuit breaker's breaking capacity and arc-extinguishing performance. Simultaneously, it optimizes the force transmission path, improves tripping sensitivity and response speed, reduces operating force requirements, and enhances operational reliability. Furthermore, this structural design is simple and easy to assemble, facilitating the miniaturization, high reliability, and mass production of circuit breaker operating mechanisms, and possesses significant engineering application value.

[0029] Reference Figure 3 , Figure 4 as well as Figure 5 As shown, as an optional implementation, after a fault trip, when the operating handle 104 moves to the open position, the sliding structure 109 moves along the linear guide 108 towards the third rotating part 107.

[0030] It should be noted that after a fault trip, when the operating handle 104 automatically moves to the open position under the action of spring force, the connecting rod 102 drives the trip fastener 101 to move, causing it to re-engage with the locking fastener 117 on the mechanism base 103, thus preparing the mechanism to reset. During this process, the linear guide 108 on the trip fastener 101 and the sliding structure 109 on the mechanism base 103 cooperate with each other. The sliding structure 109 slides along the linear guide 108 towards the third rotating part 107, forming a controllable relative motion path. This design, through the synergistic effect of the linear guide 108 and the sliding structure 109, not only ensures that the trip fastener 101 and the locking fastener 117 can accurately re-engage when the operating handle 104 is activated after tripping, but also optimizes the motion trajectory during the opening operation, making the mechanism operation smoother and more reliable. This composite motion mode takes into account the functional requirements of trip release, tripping operation and re-tripping reset, improves the consistency of the operating mechanism's actions, response sensitivity and overall reliability, and provides a basis for the miniaturization design of circuit breakers.

[0031] Reference Figure 1 , Figure 5 As shown, in one optional implementation, when the operating handle 104 moves to the closed position, the sliding structure 109 abuts against the end of the linear guide 108 near the third rotating part 107 to push the moving contact provided on the mechanism base 103 to close.

[0032] It should be noted that when the operating handle 104 moves to the closed position under the operator's control, the connecting rod 102 drives the trip fastener 101 to move. The linear guide 108 on the trip fastener, near the third rotating part 107, contacts and abuts against the sliding structure 109 on the mechanism base 103. As the operating handle 104 continues to move, this abutment pushes the sliding structure 109 to move around the second rotating part 106, thereby driving the mechanism base 103 to rotate and drive the moving contact assembly towards the stationary contact, completing the closing action. In this process, the trip fastener 101 serves as a key component for the tripping response and, during the closing operation, bears the force transmission function through the cooperation of the linear guide 108 and the sliding structure 109, achieving integrated control of multiple stages of action such as closing, opening, and re-tripping. This design makes full use of space, optimizes the force transmission path, improves the reliability and transmission efficiency of the closing operation, and maintains a compact structure, which is beneficial for improving the coordination and stability of the overall circuit breaker operation.

[0033] It should be noted that friction is generated when the sliding structural member 109 comes into contact with the linear guide 108. This friction acts as a passive damping mechanism, which enhances the stability of the trip fastener 101 in the closed holding and standby states, ensuring that the operating mechanism will not be accidentally tripped due to vibration or impact during normal operation, thereby improving the reliability and safety of the circuit breaker operation.

[0034] Reference Figure 6 As shown, in one optional embodiment, the linear guide 108 includes a slot 110; the sliding structure 109 includes a sliding column disposed on the mechanism seat 103; the sliding column is inserted into the slot 110.

[0035] It should be noted that, in this embodiment, the linear guide 108 is a slot 110 provided on the trip fastener 101, while the sliding structure 109 includes a sliding column fixed to the mechanism base 103. The sliding column is inserted into the slot 110 and can slide along the slot direction therein, thereby realizing motion coupling between the trip fastener 101 and the mechanism base 103. It should be noted that during normal operation of the mechanism to perform opening or closing operations, the slot 110 has no relative movement with respect to the sliding column, and the sliding column remains in contact with the arc-shaped abutment part 111. Only during fault tripping does the slot 110 have relative movement with respect to the sliding column. This mating structure of the slot 110 and the sliding column not only provides reliable motion guidance and ensures the accuracy of the transmission path, but also effectively prevents the trip fastener 101 from reversing under sudden force changes or vibration conditions through the friction between the contact surfaces, improving the stability and anti-interference capability of the mechanism. At the same time, this structure is simple and easy to assemble, which is beneficial to improving the reliability and production efficiency of the operating mechanism and is suitable for the design requirements of high-precision, miniaturized circuit breakers.

[0036] As an optional implementation, the sliding column includes a circular column with a diameter consistent with the width of the slot 110; the slot 110 is provided at least at the end near the third rotating part 107 with an arc-shaped abutment portion 111 for abutting against the circular column.

[0037] The sliding column is a circular cylinder with a diameter matching the width of the slot 110, ensuring a very small gap between the sliding column and the sidewall of the slot 110, effectively reducing wobbling and improving transmission accuracy. The slot 110 has an arc-shaped abutment portion 111 at least near the end of the third rotating part 107, which matches the outer circumference of the circular cylinder. This arc-shaped structure forms a C-shaped arc surface contact with the cylindrical surface of the sliding column. When the operating handle 104 moves in the closing direction, the sliding column abuts against the arc-shaped abutment portion 111, achieving stable thrust transmission and ensuring that the trip fastener 101 reliably drives the mechanism base 103 to rotate and complete the closing action. Simultaneously, the contact between the arc-shaped abutment portion 111 and the circular cylinder further enhances the friction between the structures, effectively suppressing the possible reverse rotation tendency of the trip fastener 101 during the closing action, and improving the mechanism's self-locking capability and operational stability.

[0038] Reference Figure 7 As shown, in one optional embodiment, the end of the slot 110 away from the third rotating part 107 has an opening 112.

[0039] It should be noted that the sliding pin remains within the slot 110 throughout the entire operation and will not disengage from the opening 112. The purpose of the opening 112 is to prevent the sliding pin from rigidly colliding with or excessively contacting the end of the slot 110 when sliding along it to the far end, thereby reducing unnecessary impact and additional friction and ensuring a smooth, low-resistance sliding fit between the sliding pin and the slot wall. Furthermore, this embodiment of the application also reduces the material at the end of the jump fastener 101 through the opening 112, shortening the jump fastener 101 and preventing interference with other components during movement, such as interference between the outer side of the jump fastener and the handle.

[0040] By reasonably controlling the length and position of the opening 112, the assembly tolerances and minor deviations during the movement process are effectively released while ensuring that the sliding column does not disengage, thus improving the smoothness and reliability of the mechanism's operation. During the closing process, the sliding column abuts against the arc-shaped abutment portion 111 near the end of the slot 110 near the third rotating part 107, pushing the trip fastener 101 and the mechanism seat 103 to move together; there is no relative movement during normal opening. During tripping, the sliding column moves along the slot 110 towards the end of the opening 112, and the movement can include sliding, rolling, or rotating. Because the design of the opening 112 avoids the end abutting against the slot 110, the mechanism seat 103 can respond more sensitively to the action of the trip fastener 101.

[0041] Reference Figure 5 As shown, in one optional embodiment, the geometric center of the connecting end of the link 102 and the operating handle 104 and the geometric center of the sliding structure 109 form a reference line 113, and the geometric center of the third rotating part 107 and the second rotating part 106 are located on the same side of the reference line 113.

[0042] It should be noted that setting the geometric center of the third rotating part 107 on one side of the reference line 113 formed by the geometric center of the connection end of the connecting rod 102 and the operating handle 104 and the geometric center of the sliding structure 109, rather than on the reference line 113 itself, can effectively prevent the trip fastener 101 from reversing due to an improper torque balance point during the force application process. When the third rotating part 107 is located on one side of the reference line 113, its relative position with the connecting rod 102 and the sliding structure 109 forms a favorable lever arm relationship. Under the closed holding and normal operation conditions, external disturbances or the rebound force of elastic elements are unlikely to generate a torque on the trip fastener 101 sufficient to cause reversal. In particular, when the sliding structure 109 abuts against the linear guide part 108, there is friction. The friction and the bias setting of the third rotating part 107 work together to further enhance the ability to suppress the reversal trend. If the third rotating part 107 is located exactly on the reference connection line 113, it may lead to collinear force, losing the geometric self-locking condition against reverse rotation, and making it prone to malfunction under vibration or impact. Therefore, by ensuring that the third rotating part 107 is offset to one side of the reference connection line 113, a non-collinear force layout of the mechanism is achieved, a reliable mechanical self-locking condition is constructed, and the stability and safety of the trip fastener 101 in the locked state are significantly improved, preventing the circuit breaker from accidentally tripping during normal operation.

[0043] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 as well as Figure 5 As shown, in one optional implementation, a limiting platform 114 is provided on the mechanism base 103; a first abutting surface 115 is provided on the limiting platform 114; after a fault trip, the tripping fastener 101 rotates clockwise around the third rotating part 107, and the sliding structural member 109 moves away from the third rotating part 107 along the linear guide part 108; when the moving contact of the circuit breaker moves to the open position, the first abutting surface 115 is used to prevent the tripping fastener 101 from continuing to rotate clockwise around the third rotating part 107; when the operating handle 104 moves to the open position, the third rotating part 107 passes between the second rotating part 106 and the sliding structural member 109 and moves towards the operating handle 104.

[0044] It should be noted that when a fault trip occurs, the trip unit drives the locking element 117 to rotate clockwise, and the jumper 101 unlocks from the locking element 117. During the process of the moving contact being disconnected, the jumper 101 also rotates clockwise, and the sliding structure 109 moves along the linear guide 108 in a direction away from the third rotating part 107 until the moving contact moves to the disconnected position with the maximum opening distance.

[0045] During the reset process of the operating handle 104, that is, when the operating handle 104 moves to the open position, the trip fastener 101 rotates counterclockwise. The first contact surface 115 is used to ensure that the rotation direction of the trip fastener 101 changes, so that the reversing action is reliable.

[0046] When the jump fastener 101 attempts to reverse around the third rotating part 107 due to external disturbance or abnormal force, its movement path will be physically blocked by the first abutment surface 115 on the limiting platform 114, thereby effectively preventing the jump fastener 101 from rotating unexpectedly in the opposite direction.

[0047] Reference Figure 1 , Figure 3 As shown, in an optional embodiment, the limiting platform 114 is provided with a second abutting surface 116 adjacent to the first abutting surface 115; the second abutting surface 116 is used to prevent the third rotating part 107 from moving to the side of the reference line 113 away from the second rotating part 106.

[0048] It should be noted that under normal operating conditions, the second contact surface 116 does not contact the trip fastener 101; that is, there is a gap between the second contact surface 116 and the trip fastener 101. Only when the trip fastener 101 is subjected to abnormal force or vibration, causing the geometric center of its third rotating part 107 to move away from the second rotating part 106 along the reference line 113, will the trip fastener 101 come into contact with the second contact surface 116, thus being forcibly blocked and preventing it from rotating in the opposite direction. Combined with the aforementioned measures such as friction suppression and geometric offset layout, the second contact surface 116 provides a rigid and reliable mechanical stop, ensuring that the trip fastener 101 can only move within the design-allowed range of motion, preventing locking failure or accidental disengagement due to reverse rotation.

[0049] Reference Figure 1 , Figure 2 as well as Figure 3 As shown, the circuit breaker provided in this application embodiment includes a housing 100 and an operating mechanism mounted on the housing 100; a locking member 117 for engaging with the trip fastener 101 is mounted on the mechanism base 103; when the locking member 117 is disengaged from the trip fastener 101, the sliding structure 109 of the operating mechanism moves along the linear guide portion 108 in a direction away from the third rotating portion 107.

[0050] This application provides a circuit breaker, including a housing 100 and an operating mechanism installed within the housing 100. The operating mechanism includes components such as a trip fastener 101, a connecting rod 102, a mechanism base 103, an operating handle 104, a locking element 117, and a sliding structure 109. The mechanism base 103 is rotatably mounted on the housing 100 via a second rotating part 106 and is provided with the sliding structure 109. The trip fastener 101 has a third rotating part 107 and a linear guide part 108. The third rotating part 107 is hinged to the connecting rod 102, and the other end of the connecting rod 102 is connected to the operating handle 104. The locking element 117 is installed on the mechanism base 103 and forms a locking engagement with the trip fastener 101 after the circuit is closed, thereby achieving stable maintenance of the closed state. When a circuit fault occurs and the trip unit is triggered, the trip fastener 101 rotates clockwise around the third rotating part 107, causing it to quickly separate from the locking element 117, thus achieving tripping. At the moment of tripping, the tripping element 101, through the cooperation of the linear guide 108 and the sliding structural element 109, causes the sliding structural element 109 to slide along the linear guide 108 away from the third rotating part 107, and the mechanism base 103 rotates around the second rotating part 106 at a large angle. This structure, through the coordinated movement of the linear guide 108 and the sliding structural element 109, effectively amplifies the rotational stroke of the mechanism base 103, improves the breaking speed and opening distance, and ensures sensitive and complete tripping action, significantly improving the breaking capacity and operational safety of the circuit breaker.

[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 fastener (101), a connecting rod (102), a mechanism base (103), and an operating handle (104). The operating handle (104) is connected to the circuit breaker housing (100) via a first rotating part (105), and the mechanism base (103) is connected to the circuit breaker housing (100) via a second rotating part (106). The rotation axes of the first rotating part (105) and the second rotating part (106) are parallel and spaced apart. The trip fastener (101) includes a third rotating part (107) located on the same straight line. The linkage (102) is connected to the third rotating part (107) at one end and to the operating handle (104) at the other end; the mechanism seat (103) is provided with a sliding structure (109) that cooperates with the linear guide (108); when the linkage fails, the jump buckle (101) rotates clockwise around the third rotating part (107), and the sliding structure (109) moves away from the third rotating part (107) along the linear guide (108).

2. The operating mechanism according to claim 1, characterized in that, After the fault trips, when the operating handle (104) moves to the open position, the sliding structure (109) moves along the linear guide (108) close to the third rotating part (107).

3. The operating mechanism according to claim 1, characterized in that, When the operating handle (104) moves to the closed position, the sliding structure (109) abuts against the end of the linear guide (108) near the third rotating part (107) to push the moving contact provided on the mechanism seat (103) to close.

4. The operating mechanism according to any one of claims 1-3, characterized in that, The linear guide (108) includes a slot (110); the sliding structure (109) includes a sliding column disposed on the mechanism seat (103); the sliding column is inserted into the slot (110).

5. The operating mechanism according to claim 4, characterized in that, The sliding column includes a circular column with a diameter equal to the width of the slot (110); the slot (110) is provided at least at the end near the third rotating part (107) with an arc-shaped abutment part (111) for abutting against the circular column.

6. The operating mechanism according to claim 4, characterized in that, The slot (110) has an opening (112) at the end away from the third rotating part (107).

7. The operating mechanism according to any one of claims 1-3 and 5-6, characterized in that, The geometric center of the connecting end of the link (102) and the operating handle (104) forms a reference line (113) with the geometric center of the sliding structure (109), and the geometric center of the third rotating part (107) and the second rotating part (106) are located on the same side of the reference line (113).

8. The operating mechanism according to claim 7, characterized in that, The mechanism base (103) is provided with a limiting platform (114); the limiting platform (114) is provided with a first abutting surface (115); after the fault trip, the tripping fastener (101) rotates clockwise around the third rotating part (107), and the sliding structural member (109) moves away from the third rotating part (107) along the linear guide part (108); when the moving contact of the circuit breaker moves to the disconnect position, the first abutting surface (115) is used to prevent the tripping fastener (101) from continuing to rotate clockwise around the third rotating part (107); when the operating handle (104) moves to the open position, the third rotating part (107) passes between the second rotating part (106) and the sliding structural member (109) and moves towards the operating handle (104).

9. The operating mechanism according to claim 8, characterized in that, The limiting platform (114) is provided with a second abutting surface (116) adjacent to the first abutting surface (115); the second abutting surface (116) is used to prevent the third rotating part (107) from moving to the side of the reference line (113) away from the second rotating part (106).

10. A circuit breaker, characterized in that, The device includes a housing (100) and an operating mechanism as described in any one of claims 1-9, mounted on the housing (100); a locking member (117) for engaging with a jump fastener (101) is mounted on the mechanism base (103); when the locking member (117) disengages from the jump fastener (101), the sliding structure (109) of the operating mechanism moves along the linear guide (108) in a direction away from the third rotating part (107).

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