An operating mechanism and circuit breaker

Abstract

The application provides an operating mechanism and a circuit breaker, and relates to the technical field of electrical equipment. The operating mechanism comprises a mounting piece, an opening transmission piece and a jump buckle. The opening transmission piece is movably arranged on the mounting piece through an opening shaft. The opening transmission piece is provided with a first stop part. The jump buckle is movably arranged on the mounting piece through a jump buckle shaft. The jump buckle is provided with a second stop part. In a closed state, the abutting part of the first stop part and the second stop part is a lap joint part. The center line of the first stop part and the shaft center of the opening shaft is a first opening line. The normal line corresponding to the first stop part or the second stop part at the lap joint part is a second opening line. The first opening line and the second opening line are arranged at an included angle. The angle of the included angle is negatively correlated with the contact pressure between the moving contact and the static contact of the contact assembly. It can be seen that the operating mechanism has simple structure, small number of parts, can reliably maintain the closed state, and effectively improves the stability and reliability of the operating mechanism.

Description

[0001] This application claims priority to the patent application filed on August 26, 2026, with application number 2026113122616 and title "An Operating Mechanism and Circuit Breaker". Technical Field

[0002] This invention relates to the field of electrical equipment technology, and more specifically, to an operating mechanism and a circuit breaker. Background Technology

[0003] In existing circuit breaker products, the operating mechanism is the core moving component, and its design is highly coupled with parameters such as the overall frame size of the circuit breaker, the contact spring reaction force, and the tripping stroke.

[0004] Currently, operating mechanisms generally suffer from poor versatility. For example, operating mechanisms of different frame types (such as small molded case circuit breakers and large frame circuit breakers) cannot be directly interchanged due to different stress levels. Each model requires independent design, mold making, and debugging, resulting in a wide variety of product parts, which significantly increases manufacturing costs and reduces product adaptability. Summary of the Invention

[0005] This invention provides an operating mechanism and circuit breaker with a simple structure and few parts. It can reliably maintain the closed state and quickly and stably drive the contact assembly to complete the opening action when a tripping command is received, effectively improving the adaptability, stability and reliability of the operating mechanism.

[0006] The embodiments of the present invention can be implemented as follows: In a first aspect, the present invention provides an operating mechanism, comprising: Installation components; The tripping transmission component and the tripping shaft are provided. The tripping transmission component is movably mounted on the mounting component via the tripping shaft. The tripping transmission component is provided with a first stop part. The trip latch and the trip latch shaft are provided. The trip latch is movably mounted on the mounting component via the trip latch shaft. The trip latch is provided with a second stop part. The trip latch is in transmission cooperation with the tripping transmission component and is used to drive the contact assembly to close or open the circuit. In the closed state, the first stop and the second stop abut against each other to limit the trip latch. The part where the first stop and the second stop abut against each other is the overlapping part. The line connecting the center of the first stop and the axis of the tripping shaft is the first tripping line. The normal line corresponding to the first stop or the second stop at the overlapping part is the second tripping line. The first tripping line and the second tripping line are set at an angle, and the angle is negatively correlated with the contact pressure between the moving contact and the stationary contact of the contact assembly. In the open state, the tripping transmission component releases the trip latch from the limit.

[0007] In an optional embodiment, the thickness of the tripping transmission component along the tripping shaft is a first thickness, and the thickness of the tripping latch along the tripping latch shaft is a second thickness, wherein the ratio of the first thickness to the second thickness is 1:1.2 to 1:2. And / or, the distance between the axis of the tripping shaft and the overlapping part is a first distance, and the distance between the axis of the tripping shaft and the overlapping part is a second distance, and the ratio of the first distance to the second distance is 1:1 to 1:1.5; And / or, the radius ratio of the tripping shaft to the tripping lever shaft is 1:1.2 to 1:2.

[0008] In an optional implementation, the ratio of the first thickness to the second thickness is 1:1.2; And / or, the ratio of the first distance to the second distance is 1:1.2; And / or, the radius ratio of the tripping shaft to the tripping lever shaft is 1:1.2.

[0009] In an optional embodiment, the tripping transmission component includes two parallel and spaced-apart tripping plates riveted together, and the first thickness is the axial thickness of a single tripping plate along the tripping shaft.

[0010] In an optional implementation, under the minimum rated current condition within a preset current range, the first force represents the force capable of releasing the trip stop limit; under the maximum rated current condition within a preset current range, the second force represents the force capable of releasing the trip stop limit; and the ratio of the maximum first force to the maximum second force is less than or equal to 1:1.5.

[0011] In an optional embodiment, the stiffness ratio of the tripping transmission component to the stiffness of the trip latch is 1:2 to 1:5.

[0012] In an optional embodiment, when the first stop and the second stop are in contact and not under force, the angle between the first tripping line and the second tripping line is a preset angle; when the circuit is closed and the first stop and the second stop are in contact, the angle between the first tripping line and the second tripping line is an actual angle, which is smaller than the preset angle.

[0013] In an optional implementation, the amount of deformation corresponding to the actual included angle is positively correlated with the contact pressure between the moving contact and the stationary contact of the contact assembly.

[0014] In an optional embodiment, the trip latch is further provided with a third stop, during the tripping process, the first stop and the third stop abut against each other to limit the trip latch.

[0015] In an optional embodiment, the operating mechanism further includes a tripping limiter, which is movably disposed on the mounting member. The tripping limiter is used to move into the movement path of the tripping transmission member to limit the tripping transmission member so that the first stop portion of the tripping transmission member can abut against the second stop portion; or it is used to move outside the movement path of the tripping transmission member so that the first stop portion disengages from the second stop portion, thereby releasing the limiting effect on the trip latch.

[0016] In a second aspect, the present invention provides a circuit breaker including an operating mechanism as described in any of the foregoing embodiments.

[0017] The beneficial effects of the operating mechanism and circuit breaker provided in this embodiment of the invention include: in the closed state, the tripping transmission component abuts against the trip latch to limit the trip latch, thereby preventing displacement of the transmission link and keeping the contact assembly in the closed position; when a tripping operation is required, the tripping transmission component is driven to move, thereby releasing the tripping transmission component from limiting the trip latch, thus releasing the trip latch from constraining the transmission link, allowing the transmission link to be driven to the tripping state, and finally pushing the contact assembly from the closed position to the tripping position; furthermore, the line connecting the center of the first stop part and the axis of the tripping shaft is the first tripping line, and its corresponding direction is the deformation direction of the tripping transmission component. At the overlapping portion, the normal line corresponding to the first or second stop is the second tripping connection line, and its corresponding direction is the force direction of the tripping transmission component. Therefore, by setting the first and second tripping connection lines at an angle, and the size of the angle being negatively correlated with the contact pressure between the moving and stationary contacts of the contact assembly, the greater the pressure on the contact assembly when it is closed, the smaller the overlapping error caused by deformation between the tripping transmission component and the trip latch. This avoids large deformation of the first and second stopes, thus effectively improving the overlapping stability of the tripping transmission component and the trip latch, adapting to circuit breakers of different sizes, and ensuring that the force required to release the overlapping of different circuit breakers is small. It can be seen that the operating mechanism provided by this embodiment has a simple structure, few parts, and can reliably maintain the closed state. Upon receiving a tripping command, it can quickly and stably drive the contact assembly to complete the tripping action, effectively improving the adaptability, stability, and reliability of the operating mechanism. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, 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 the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 An exploded view of the operating mechanism provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the energy storage tripping state of the operating mechanism provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the operating mechanism's energy release and tripping state provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the operating mechanism's energy storage closing state provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the operating mechanism's energy release and closing state provided in an embodiment of the present invention; Figure 6 This is a partial schematic diagram of the energy storage state of the operating mechanism provided in an embodiment of the present invention; Figure 7 This is a partial schematic diagram of the operating mechanism in the closed state provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of a modified tripping component provided in an embodiment of the present invention.

[0020] Icons: 10-Operating mechanism; 100-Mounting component; 110-Base; 120-Cover plate; 130-Base; 200-Transmission link; 210-Upper link; 220-Link shaft; 230-Lower link; 300-Energy storage component; 310-Energy storage element; 320-Energy storage transmission element; 321-First connecting part; 322-Second connecting part; 323-First energy storage overlap part; 324-Second energy storage overlap part; 325-Third connecting part; 330-Energy storage locking element; 331-Abutting part; 332-First limiting part ; 333-Energy storage shaft; 400-Closing assembly; 410-Closing transmission component; 411-Second limit part; 412-Third limit part; 413-Closing shaft; 414-Fourth limit part; 420-Closing limit component; 500-Opening assembly; 510-Opening transmission component; 511-First stop part; 512-Fourth stop part; 513-Opening shaft; 520-Trip latch; 521-Second stop part; 522-Third stop part; 523-Trip latch shaft; 530-Opening limit component; 600-Contact assembly. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0023] It should be noted that similar labels 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.

[0024] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0025] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0026] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0027] In existing circuit breaker products, the operating mechanism is the core moving component, and its design is highly coupled with parameters such as the overall frame size of the circuit breaker, the contact spring reaction force, and the tripping stroke.

[0028] Currently, operating mechanisms generally suffer from poor versatility. For example, operating mechanisms of different frame types (such as small molded case circuit breakers and large frame circuit breakers) cannot be directly interchanged due to different stress levels. Each model requires independent design, mold making, and debugging, resulting in a wide variety of product parts, which significantly increases manufacturing costs and reduces product adaptability.

[0029] Therefore, there is an urgent need for an operating mechanism with a simplified structure, fewer parts, and the ability to reliably maintain the closed position and quickly respond to the opening command, so as to improve the operational stability, long-term operational reliability and adaptability of switchgear.

[0030] Please see Figures 1 to 8 This invention provides an operating mechanism 10, including a mounting component 100, a transmission link 200, an energy storage component 300, a closing component 400, and a opening component 500.

[0031] The mounting component 100 is an assembly and support component for the overall parts. It may include rigid structural components such as side plates, bases 110, cover plates 120 and bases 130. It may be provided with multiple fixed shaft holes or support shafts for rotatably mounting various moving parts.

[0032] The transmission link 200 is a key intermediate component that ultimately transmits mechanical energy to the contact assembly 600. It typically includes an upper link 210, a lower link 230, and a link shaft 220 connecting the two. It swings synchronously during the closing or opening action, thereby driving the contact assembly 600 to close or open to complete the closing or opening action.

[0033] The energy storage component 300 stores energy through external force and releases energy after the energy storage state is released to drive the transmission link 200 to move rapidly, thereby driving the contact assembly 600 to close rapidly to complete the circuit breaker.

[0034] The closing assembly 400 and the opening assembly 500 are components corresponding to the closing and opening functions, respectively. The closing assembly 400 is driven by the energy storage assembly 300 to release energy when the energy storage assembly 300 is in the energy storage state, thereby driving the transmission link 200 to move and drive the contact assembly 600 to close. Correspondingly, the opening assembly 500 is driven by the transmission link 200 to move and drive the contact assembly 600 to open.

[0035] As can be seen, the operating mechanism 10 has an energy storage closing state, an energy release closing state, an energy storage opening state, and an energy release opening state. That is, the closing state includes the energy storage closing state and the energy release closing state, and so on. The following will describe the above states in detail with each component.

[0036] Specifically, the energy storage component 300 includes an energy storage element 310, an energy storage transmission element 320, and an energy storage locking element 330.

[0037] In detail, the energy storage transmission component 320 is provided with a first connecting part 321 and a second connecting part 322. The energy storage transmission component 320 is rotatably disposed on the mounting component 100 through the first connecting part 321. The energy storage component 310 is in transmission cooperation with the second connecting part 322. The energy storage transmission component 320 is used to drive the energy storage component 310 to store energy so as to be in an energy storage state.

[0038] In this embodiment, the energy storage component 310 includes an energy storage spring and an energy storage bracket for mounting the energy storage spring. One end of the energy storage bracket is rotatably mounted on the base 130. The energy storage bracket is a telescopic structure. The energy storage spring is sleeved on the energy storage bracket, with one end abutting against the base 130 and the other end abutting against the telescopic end of the energy storage bracket, so as to drive the connecting rod shaft 220 of the transmission connecting rod 200 to move through the energy storage bracket.

[0039] The energy storage transmission component 320 is a plate-shaped lever mechanism with two degrees of rotational freedom. Its first connecting part 321 is the energy storage shaft, which is rotatably mounted on the mounting part 100 and serves as the rotation fulcrum of the entire energy storage transmission component 320. The second connecting part 322 is the transmission shaft located at the end of the energy storage transmission component 320. This transmission shaft is rotatably engaged with the end of the energy storage bracket of the energy storage component 310, so that the extension and contraction deformation of the energy storage spring of the energy storage component 310 can be directly converted into the rotational motion of the energy storage transmission component 320 with the first connecting part 321 as the center. Specifically, when the energy storage transmission component 320 is driven to rotate, it drives the energy storage component 310 to move, thereby stretching or compressing the energy storage spring, completing the energy storage process, and entering a stable energy storage state.

[0040] The closing assembly 400 includes a closing transmission component 410 and a closing limit component 420. The closing transmission component 410 is movably disposed on the mounting component 100 and directly or indirectly drives the energy storage transmission component 320 through an overlap. Therefore, by cooperating with the energy storage transmission component 320, the constraint on the energy storage transmission component 320 is released, so that the energy storage component 310 releases energy, thereby driving the energy storage transmission component 320 to drive the transmission link 200 to move to the closing state.

[0041] It is worth mentioning that the second limiting part 411 and the fourth limiting part 414 of the closing transmission member 410 are located on one side of the center line connecting the first connecting part 321 and the second connecting part 322, that is, on the cross-section of the operating mechanism 10. During the entire movement of the operating mechanism 10, the closing transmission member 410 is always located on one side of the dividing line with the center line connecting the center of the first connecting part 321 and the center of the second connecting part 322 as the dividing line. This allows the closing transmission member 410 to stay away from and avoid the movement area of ​​the energy storage transmission member 320, thereby ensuring that they operate reliably within their respective movement areas and avoiding mutual interference during movement.

[0042] As can be seen, the operating mechanism 10 provided in this embodiment of the invention has a reasonable structural design and spatial layout. It not only makes effective use of its installation space, which is conducive to miniaturization design, but also ensures that the energy storage component 300 and the closing transmission component 410 do not interfere with each other during the movement, thereby improving the operational reliability of the operating mechanism 10.

[0043] It is worth mentioning that, since both the first connecting part 321 and the second connecting part 322 are rotating shaft structures, during the entire movement of the operating mechanism 10, the plane coplanar with the axes of the first connecting part 321 and the second connecting part 322 is the interface, and the closing transmission component 410 is located on one side of this interface.

[0044] Furthermore, the tripping assembly 500 includes a tripping transmission component 510, which is movably disposed on the mounting component 100 and engages with the transmission link 200 in a transmission cooperation. The tripping transmission component 510 is used to drive the transmission link 200 to move to the tripping state.

[0045] It should be noted that the phrase "the tripping transmission component 510 drives the transmission link 200 to move to the tripping state" refers to the tripping transmission component 510 releasing the constraint on the transmission link 200 so that the transmission link 200 can be driven to move. For example, a driving component can be provided on the transmission link 200. This driving component can be a return spring, which can always apply a driving force toward the tripping state to the transmission link 200. The tripping transmission component 510 can constrain the transmission link 200 to the closed state by engaging with the transmission link 200, or it can release the engagement with the transmission link 200 to drive the transmission link 200 to move to the tripping state in the unconstrained state.

[0046] In the states of energy storage closing, energy storage opening, energy release opening, and energy release closing, the closing drive component 410 is located on one side of the center line connecting the first connecting part 321 and the second connecting part 322, and the opening drive component 510 is located on the other side of the center line connecting the first connecting part 321 and the second connecting part 322 away from the closing drive component 410. That is, the closing drive component 410 and the opening drive component 510 are located on both sides of the energy storage drive component 320, so that the closing assembly 400 and the opening assembly 500 can move reliably within their respective movement areas, avoiding mutual interference. It also facilitates the horizontal placement of the closing assembly 400 and the opening assembly 500 in different areas, thereby reducing the height space and effectively utilizing the horizontal width space to lengthen the closing assembly 400 and the opening assembly 500, thereby reducing the contact force with the corresponding limit component overlap position, thus reducing the overall stress level and benefiting the service life of the circuit breaker. It is understandable that the location of the closing drive component 410 and the opening drive component 510 on both sides of the center line connecting the first connecting part 321 and the second connecting part 322 mainly refers to the positional layout between the two. The fact that most of the main structure of the closing drive component 410 and the opening drive component 510 is located on both sides of the center line also falls under this positional layout. Of course, it is preferable that the complete closing drive component 410 and the complete opening drive component 510 are located on both sides of the center line.

[0047] The physical isolation and functional decoupling of the opening and closing systems in the installation area are achieved, which not only avoids mutual interference between the three systems during operation and improves operational reliability, but also makes the spatial layout of the three systems more reasonable.

[0048] It is worth mentioning that the opening transmission component 510, the transmission link 200, the energy storage transmission component 320, and the closing transmission component 410 are along the first direction (e.g., Figure 3 The components are arranged sequentially (as shown in the X direction) so that the mounting axis, limit reference surface and motion envelope area of ​​each component are naturally aligned, and the redundant space occupied by the mechanism along the first direction (e.g., the corresponding height direction) is significantly reduced. It also frees up lateral width space on the side near the closing transmission component 410 to lengthen the lever arm of the closing transmission component 410.

[0049] Furthermore, in the energy storage state, the extending directions of the tripping drive 510, the energy storage drive 320, and the closing drive 410 are parallel to the second direction (e.g., Figure 3 The included angles (shown in the Y direction) are all less than 30°, and the second direction is perpendicular to the first direction. On the one hand, this significantly reduces the vertical stroke space required for traditional vertically arranged levers, allowing the entire operating mechanism 10 to be integrated in a more compact housing, thereby reducing the extension length (e.g., height) of the housing of the mounting component 100 along the first direction. On the other hand, the extension structure along the second direction (e.g., the lateral direction) naturally adapts to the redundant space in the width direction of the circuit breaker body, facilitating the lengthening of the lever arm and improving mechanical life.

[0050] In the energy storage closed state, the angle formed between the extension direction of the opening transmission component 510, the closing transmission component 410, the upper connecting rod 210, the lower connecting rod 230 and the energy storage transmission component 320 and the second direction is less than 30°.

[0051] In the energy storage tripping state, the angle between the extension direction of the tripping transmission component 510, the closing transmission component 410, the lower connecting rod 230 and the energy storage transmission component 320 and the second direction is less than 30°.

[0052] In the energy release closing state, the angles formed between the extension directions of the opening transmission component 510, the closing transmission component 410, the upper connecting rod 210, and the lower connecting rod 230 and the second direction are all less than 30°.

[0053] In the energy-released opening state, the angle formed between the extension direction of the opening transmission component 510, the closing transmission component 410, and the lower connecting rod 230 and the second direction is less than 30°.

[0054] Furthermore, the tripping transmission component 510 and the upper connecting rod 210 are connected by a trip latch 520 rotatably mounted on the mounting component 100. Specifically, the trip latch 520 is rotatably mounted on the mounting component 100 via a trip latch shaft 523 and is hinged to the upper connecting rod 210. The angle between the extension direction of the trip latch 520 and the second direction is less than 30°, and the extension direction of the trip latch 520 is the direction of the line connecting the center of the hinge portion of the trip latch shaft 523 and the upper connecting rod 210.

[0055] Furthermore, the energy storage transmission component 320 is provided with at least one of a first energy storage overlap portion 323 and a second energy storage overlap portion 324.

[0056] During the transition from the open state to the closed state, the first energy storage contact 323 abuts against the transmission link 200 to drive the transmission link 200 to move, thereby driving the contact assembly 600 to close; while in the closed state, the first energy storage contact 323 separates from the transmission link 200.

[0057] In this embodiment, the first energy storage overlap 323 is connected to the second energy storage overlap 324, and the cross-section of the first energy storage overlap 323 is an arc-shaped groove, while the cross-section of the second energy storage overlap 324 is a straight line. The first energy storage overlap 323 and the second energy storage overlap 324 are disposed at one end of the energy storage transmission member 320 near the second connecting portion 322, and are located in the circumferential position of the second connecting portion 322.

[0058] In the energy storage open state, the first energy storage contact 323 abuts against the transmission link 200. In the energy release open state, the second energy storage contact 324 abuts against the transmission link 200 to directly limit the link shaft 220 of the transmission link 200. This not only reduces the number of limiting parts but also ensures that the trip latch 520 remains stable in both open states. This prevents the contact assembly 600 from falling back after a large current in the circuit pushes it away, thus facilitating the disconnection.

[0059] Furthermore, the energy storage component 300 also includes an energy storage locking member 330, which is movably disposed on the mounting member 100. The energy storage locking member 330 is in a transmission cooperation with the energy storage transmission member 320 to drive the energy storage transmission member 320 to move, thereby driving the energy storage component 310 to store energy.

[0060] It should be noted that when energy storage is required, the energy storage locking component 330 can be driven by an external drive mechanism or manually driven by an operator, thereby driving the energy storage transmission component 320 to move, and finally the energy storage component 310 is driven by the energy storage transmission component 320 to achieve energy storage.

[0061] In the energy storage state, the closing transmission component 410 abuts against the energy storage locking component 330 to limit the energy storage transmission component 320 through the energy storage locking component 330, thereby constraining the energy storage transmission component 320 and the energy storage component 310 in the energy storage state.

[0062] When closing is required, the closing transmission component 410 is automatically driven by the drive mechanism or manually driven by the operator to disengage from the energy storage locking component 330. This releases the energy storage locking component 330 from limiting the energy storage transmission component 320. In this state, the energy storage locking component 330 is unrestrained, and the energy storage transmission component 320 can move in the opposite direction under the drive of the energy storage component 310, releasing energy and driving the transmission linkage 200 to enter the closing state. This achieves highly reliable energy storage maintenance and instantaneous energy release.

[0063] Furthermore, the energy storage transmission component 320 is also provided with a third connecting part 325, which is a bearing structure and is located on the side of the first connecting part 321 away from the second connecting part 322.

[0064] The energy storage locking member 330 can be a cam structure, with an abutment part 331 on its outer periphery. The abutment part 331 extends spirally along the rotation center of the energy storage locking member 330, and the abutment part 331 slides in cooperation with the third connecting part 325.

[0065] Specifically, the contact portion 331 is the outer peripheral wall of the energy storage locking member 330, which is an involute in cross-section. This wall extends in a continuous, smooth, and monotonically increasing spiral shape along the rotation center of the energy storage locking member 330.

[0066] During the energy storage process, when the energy storage locking member 330 is driven to rotate by an external force, its abutting part 331 continuously pushes the third connecting part 325 to roll or slide along the curved wall, forcing the energy storage transmission member 320 to rotate around its first connecting part 321. Since the involute has the characteristics of "generating" and "equidistant", this pushing process can ensure that the motion trajectory of the third connecting part 325 is smooth and without abrupt changes, and the thrust direction always points to the vicinity of the rotation center of the energy storage transmission member 320, thereby significantly reducing friction loss and local stress concentration.

[0067] In addition, the energy storage locking member 330 is provided with a first limiting part 332, and the closing transmission member 410 is provided with a second limiting part 411 and a fourth limiting part 414. In the energy storage state, the first limiting part 332 abuts against the second limiting part 411, and the fourth limiting part 414 abuts against the closing limiting member 420, so as to limit the energy storage transmission member 320 by the energy storage locking member 330, thereby constraining the energy storage locking member 330 in the energy storage state.

[0068] In this embodiment, in the energy storage state and the energy release state, the closing shaft 413, the closing limit member 420 and the second limit part 411 are located on the same side of the center line connecting the first connecting part 321 and the second connecting part 322, and further, on the same side of the entire energy storage transmission member 320.

[0069] In detail, the first limiting part 332 is planar, the closing transmission member 410 is rotatably mounted on the mounting member 100 via the closing shaft 413, and the second limiting part 411 is a shaft structure. Specifically, the second limiting part 411 can be a bearing.

[0070] When the first limiting part 332 is in contact with the second limiting part 411 and is not under force, the straight line passing through the center of the second limiting part 411 and perpendicular to the first limiting part 332 is the first closing connection line (e.g., Figure 6 As shown by the dashed line A), the line connecting the rotation center of the closing transmission component 410 and the axis of the second limiting part 411 is the second closing connection line (as shown by the dashed line A). Figure 6 As shown by the dashed line B), the first closing connection line and the second closing connection line are set at an angle. At this time, the angle between the first closing connection line and the second closing connection line is the overlap angle. In the energy storage state, that is, the overlap state, this angle is the actual overlap angle. The size of the actual overlap angle is negatively correlated with the energy storage spring force of the energy storage component 310. This ensures that the closing and unlocking force required under different energy storage spring force sizes is within a certain design range, which facilitates the interchangeability of components of different frame circuit breakers.

[0071] It is also worth mentioning that by designing the stiffness of the closing transmission component 410 and the energy storage locking component 330, the deformation of the two components can be controlled, thereby controlling the actual overlap angle, and ultimately controlling the unlocking force of the two components within 1:3; it can be understood that the actual overlap angle is smaller than the overlap angle.

[0072] It should be noted that under large loads, the first limiting part 332 and the second limiting part 411 are prone to lateral deviation, and the deformation of the first limiting part 332 and the second limiting part 411 under the same force is significantly different. This causes a large change in the overlap angle of the first limiting part 332 and the second limiting part 411. If the angle is too large, it will increase the force required for the first limiting part 332 and the second limiting part 411 to separate, and in severe cases, they may not be able to separate. If the angle is too small, it may cause frictional self-locking between the first limiting part 332 and the second limiting part 411, which will also prevent them from separating.

[0073] To ensure the reliability and stability of the connection, the energy storage locking component 330 and the closing transmission component 410 with the same material and structural rigidity are preferred for different shells.

[0074] Furthermore, the closing limit member 420 is movably or rotatably disposed on the mounting member 100. The closing limit member 420 is used to move to the movement path of the closing transmission member 410 to limit the closing transmission member 410 so that the first limiting part 332 of the closing transmission member 410 can abut against the second limiting part 411; or it is used to move to outside the movement path of the closing transmission member 410 so that the first limiting part 332 disengages from the second limiting part 411 in the energy storage state so that the energy storage locking member 330 cancels the force on the energy storage transmission member 320.

[0075] In this embodiment, the closing limit member 420 is a rotating shaft structure, and the part that limits the movement is a half-shaft structure. In the energy storage state, the closing limit member 420 constrains the closing transmission member 410, thereby constraining the closing transmission member 410, the energy storage locking member 330, the energy storage transmission member 320, and the energy storage member 310 to the energy storage position.

[0076] Therefore, when a closing operation is required, the closing limit component 420 can be rotated automatically by the drive mechanism or manually by the operator so that the part of the closing limit component 420 that limits the closing operation moves away from the closing transmission component 410, thereby releasing the constraint on the closing transmission component 410. This allows the energy storage component 310 to drive the energy storage transmission component 320 to move, thereby driving the contact assembly 600 to close through the transmission connection.

[0077] It is worth mentioning that the closing limiter 420 is located within the acute angle region formed by the energy storage component 310 and the energy storage transmission component 320. In this embodiment, the closing limiter 420 is located between the energy storage component 310 and the energy storage locking component 330, and is located on the side of the energy storage locking component 330 away from the energy storage transmission component 320.

[0078] Of course, the closing limit device 420 can also be located in the area enclosed by the energy storage device 310, the energy storage transmission device 320 and the energy storage locking device 330, so as to make full use of the installation space, which not only makes the layout of the operating mechanism 10 more reasonable, but also reduces its installation volume.

[0079] To prevent the closing drive 410 from moving excessively after the closing limiter 420 releases its constraint on the closing drive 410, the movement trajectory of the closing drive 410 is limited by the mounting part 100 and the energy storage lock 330 during the transition from the energy storage state to the energy release state. During the transition from the energy release state to the energy storage state, the movement trajectory of the closing drive 410 can also be limited by the energy storage lock 330 and the closing limiter 420, thereby terminating the movement of the closing drive 410 at a preset safety limit position.

[0080] That is, during the transition between the energy storage state and the energy release state, the closing transmission component 410 moves along the second direction of motion (e.g., Figure 6The closing transmission component 410 (rotating counterclockwise around the center of rotation of the closing shaft 413) moves to its end position and is limited by the energy storage locking component 330, and / or, along a first movement direction opposite to the second movement direction (such as...). Figure 6 The closing transmission component 410 shown rotates clockwise around the center of rotation of the closing shaft 413 and moves to the end position where it is limited by the mounting component 100.

[0081] The closing transmission component 410 is also provided with a third limiting part 412. When the closing limiting part 420 moves outside the movement path of the closing transmission component 410, after the first limiting part 332 disengages from the second limiting part 411, the third limiting part 412 abuts against the base 110 of the mounting component 100. That is, the third limiting part 412 is limited by the base 110 of the mounting component 100, thereby preventing it from continuing to rotate and terminating its movement at a preset safety limit position.

[0082] It is worth mentioning that the closing limit device 420 is located in the area enclosed by the energy storage device 310, the energy storage transmission device 320 and the energy storage locking device 330, thereby making full use of the installation space, which not only makes the layout of the operating mechanism 10 more reasonable, but also helps to reduce its installation volume.

[0083] It is understood that in some other embodiments of the present invention, as shown in the figure, the third limiting part 412 may also abut against the rotating shaft of the energy storage locking member 330 to limit the closing transmission member 410.

[0084] Specifically, during the transition from the energy storage state to the energy release state, the fourth limiting part 414 disengages from the closing limiting member 420, and the first limiting part 332 disengages from the second limiting part 411, i.e., the energy storage locking member 330 disengages from the closing transmission member 410. The closing transmission member 410 moves in the first direction of movement until the third limiting part 412 abuts against the mounting member 100 to limit the closing transmission member 410. After this state, since the first limiting part 332 disengages from the second limiting part 411, i.e., the energy storage locking member 330 disengages from the closing transmission member 410, the closing transmission member 410 can move in the opposite direction under the action of the reset force (e.g., through the reset spring) until it abuts against the energy storage locking member 330 to limit the closing transmission member 410.

[0085] During the transition from the energy release state to the energy storage state, as the energy storage locking member 330 rotates, the closing transmission member 410 moves along the outer contour of the first cam 334 until the first limiting part 332 engages with the second limiting part 411, and the fourth limiting part 414 engages with the closing limiting member 420, thereby achieving the limiting of the closing transmission member 410.

[0086] In this embodiment, the mounting component 100 includes two parallel and spaced side plates. The closing transmission component 410 is rotatably mounted between the two side plates via the closing shaft 413. The two side plates extend along their opposing inner sidewalls and are provided with a base 110 in the form of an axis or block, so as to cooperate with the third limiting part 412 through the base 110.

[0087] Specifically, during the transition from the energy storage state to the energy release state, the fourth limiting part 414 disengages from the closing limiting member 420, and the first limiting part 332 disengages from the second limiting part 411, i.e., the energy storage locking member 330 disengages from the closing transmission member 410. The closing transmission member 410 moves in the first direction of movement until the third limiting part 412 abuts against the mounting member 100 to limit the closing transmission member 410. After this state, since the first limiting part 332 disengages from the second limiting part 411, i.e., the energy storage locking member 330 disengages from the closing transmission member 410, the closing transmission member 410 can move in the opposite direction under the action of the reset force (e.g., through the reset spring) until it abuts against the energy storage locking member 330 to limit the closing transmission member 410.

[0088] During the transition from the energy release state to the energy storage state, as the energy storage locking member 330 rotates, the closing transmission member 410 moves in the first direction of motion until the first limiting part 332 engages with the second limiting part 411, and the fourth limiting part 414 engages with the closing limiting member 420, thereby achieving the limiting of the closing transmission member 410.

[0089] In this embodiment, the mounting component 100 includes two parallel and spaced side plates. The closing transmission component 410 is rotatably mounted between the two side plates via the closing shaft 413. The two side plates extend along their opposing inner sidewalls and are provided with a base 110 in the form of an axis or block, so as to cooperate with the third limiting part 412 through the base 110.

[0090] Furthermore, the operating mechanism 10 also includes an energy storage shaft 333, and an energy storage locking member 330 is rotatably mounted on the mounting member 100 via the energy storage shaft 333. The energy storage locking member 330 includes a first cam 334 and a second cam 335, both of which are mounted on the energy storage shaft 333 to rotate synchronously with it. A first limiting part 332 is mounted on the first cam 334, and the second cam 335 cooperates with the energy storage transmission member 320. Notably, an abutment part 331 is mounted on the second cam 335, and the outer diameter of the second cam 335 is larger than the outer diameter of the first cam 334. The abutment part 331 abuts against the third connecting part 325 in the energy storage state. During the transition from the energy release state to the energy storage state, the closing transmission component 410 is driven by the reset force, and the second limiting part 411 abuts against the outer contour of the first cam 334 until the first limiting part 332 abuts against the second limiting part 411 to limit the closing transmission component 410.

[0091] Thus, during the transition between the energy storage state and the energy release state, the closing transmission component 410 can be limited by the energy storage locking component 330, the closing limit component 420, or the mounting component 100. This effectively reduces the number of parts in the operating mechanism 10, making the structural layout of the operating mechanism 10 more reasonable, reducing the installation volume, and effectively preventing interference between components during movement, thereby improving the reliability of the operating mechanism 10.

[0092] Furthermore, the closing transmission component 410 is provided with a closing shaft 413, and the closing transmission component 410 is rotatably mounted on the mounting component 100 via the closing shaft 413; the energy storage locking component 330 is provided with an energy storage shaft 333, and the energy storage locking component 330 is rotatably mounted on the mounting component 100 via the energy storage shaft 333.

[0093] It is worth mentioning that, in this embodiment, the closing shaft 413 is located at the end of the second limiting part 411 that is away from the fourth limiting part 414.

[0094] Furthermore, the energy storage component 310 includes two energy storage springs. Correspondingly, the energy storage transmission component 320 has two second connecting parts 322 and two third connecting parts 325. The energy storage locking component 330 also has two second cams 335, while the first cam 334 can be only one. The closing transmission component 410 has one component. Considering structural strength and stability, as well as the versatility of different frame parts, the closing transmission component 410 includes two riveted closing plates, on which are provided... A second limiting part 411 is provided. The closing transmission component 410 is rotatably mounted on the mounting component 100 via the closing shaft 413. The first cam 334 and the second cam 335 are rotatably mounted on the mounting component 100 via the energy storage shaft 333. The energy storage transmission component 320 is rotatably mounted on the mounting component 100 via the first connecting part 321. The energy storage locking component 330 and the energy storage transmission component 320 are in one-to-one transmission cooperation. The closing transmission component 410 is in transmission cooperation with at least one energy storage locking component 330.

[0095] Furthermore, the tripping assembly 500 also includes a trip latch 520, which is movably disposed on the mounting component 100 and connected to the transmission link 200.

[0096] In the closed state, the opening transmission component 510 abuts against the trip latch 520 to limit the trip latch 520, thereby preventing the transmission link 200 from displacing and keeping the contact assembly 600 in the closed position. When an opening operation is required, the opening transmission component 510 is driven to move, so that the opening transmission component 510 releases the limit on the trip latch 520, thereby releasing the constraint of the trip latch 520 on the transmission link 200, so that the transmission link 200 can be driven to the opening state, and finally push the contact assembly 600 from the closed position to the opening position.

[0097] Therefore, the operating mechanism 10 provided in this embodiment of the invention has a simple structure and requires few parts. It can reliably maintain the closed state and quickly and stably drive the contact assembly 600 to complete the opening action when a tripping command is received, effectively improving the stability and reliability of the operating mechanism 10.

[0098] When the operating mechanism 10 is in the closed state, the tripping transmission component 510 remains in its initial position and abuts against the trip latch 520 to form a stable mechanical latching relationship. At this time, the trip latch 520 is completely restrained and cannot rotate around its own rotation axis.

[0099] In the open state, the opening transmission component 510 is automatically driven by the drive mechanism or manually driven by the operator to disengage from the trip latch 520. That is, the opening transmission component 510 no longer applies a restraining and limiting force to the trip latch 520. At this time, the transmission link 200 can drive the contact assembly 600 to open.

[0100] Furthermore, the trip lever 520 is also provided with a third stop 522. When the tripping transmission member 510 is in a straight line, after the first stop 511 disengages from the second stop 521 and the trip lever 520 rotates in the second direction of movement (counterclockwise as shown in the figure), the third stop 522 can abut against the first stop 511 to restrict the rotation of the trip lever 520.

[0101] When the tripping transmission component 510 is bent, after the first stop 511 disengages from the second stop 521 and the trip latch 520 rotates in the second direction (counterclockwise as shown in the figure), the third stop 522 can directly abut against the tripping shaft 513. This solution cleverly utilizes the tripping shaft 513 as the stop reference for the trip latch 520, realizing component reuse and further reducing the number of components.

[0102] Furthermore, the tripping assembly 500 also includes a tripping shaft 513 and a tripping lever shaft 523. The tripping transmission component 510 is rotatably mounted on the mounting component 100 via the tripping shaft 513, and the tripping lever 520 is rotatably mounted on the mounting component 100 via the tripping lever shaft 523.

[0103] It should be noted that in the closed state, the first stop part 511 and the second stop part 521 abut against the opening transmission member 510 and the trip latch 520 to limit the trip latch 520; in the open state, the opening transmission member 510 disengages from the trip latch 520 to release the limit on the trip latch 520.

[0104] In the closed state, the part where the first stop 511 and the second stop 521 abut is the overlapping part. This overlapping part is the actual contact area where the first stop 511 and the second stop 521 abut against each other and transmit constraint force in the closed state. Its position directly determines the torque balance between the tripping transmission component 510 and the trip latch 520. The line connecting the center of the first stop 511 (since the first stop 511 is a rotating shaft structure, the center of the first stop 511 is also the axis of the first stop 511) and the axis of the tripping rotating shaft 513 is the first tripping connection line (e.g., ...). Figure 7 As shown by the dashed line C), the normal line corresponding to the first stop 511 or the second stop 521 at the overlapping part (i.e., the perpendicular line to the tangent of the first stop 511, or the perpendicular line to the second stop 521) is the second trip connection line (as shown by the dashed line C). Figure 7 As shown by the dashed line D), it can be understood that the direction corresponding to the first tripping connection is the direction of deformation of the tripping transmission component, and the direction corresponding to the second tripping connection is the direction of force on the tripping transmission component.

[0105] It is also worth mentioning that when the first stop 511 and the second stop 521 are in contact and not under force, the angle between the first tripping line and the second tripping line is a preset angle; when the circuit is closed and the first stop 511 and the second stop 521 are in contact, the angle between the first tripping line and the second tripping line is the actual angle, which is smaller than the preset angle.

[0106] By setting the first tripping connection line and the second tripping connection line at an angle (i.e., the actual angle described below), and the size of the angle is negatively correlated with the contact pressure between the moving contact and the stationary contact of the contact assembly 600, while the deformation corresponding to the actual angle is positively correlated with the contact pressure between the moving contact and the stationary contact of the contact assembly 600, the actual angle is always anchored near the design value, thereby avoiding large deformation of the first stop part 511 and the second stop part 521. This effectively improves the connection stability of the tripping transmission component 510 and the trip latch 520. More importantly, it facilitates the common use of parts of the operating mechanism 10 of different frame circuit breakers.

[0107] It should be noted that under light load conditions, i.e., when the closing pressure on the contact assembly 600 is relatively small, the deformation caused by the overlapping force between the tripping transmission component 510 and the trip latch 520 is minimal. The actual included angle is the design value or close to the design value, and the torque is the light load force multiplied by the length of the first tripping connection and the larger included angle at the overlap. However, under heavy load conditions, and with the overlap structure unchanged, since the angle is negatively correlated with the contact pressure between the moving and stationary contacts of the contact assembly 600, the actual included angle under this condition is much smaller than that under light load conditions. This makes the torque on the tripping transmission component 510 the heavy load force multiplied by the same length (i.e., the length of the first tripping connection) and then multiplied by the smaller actual included angle at the overlap, thus approaching the value under light load conditions. This ensures that the torque on the tripping transmission component 510 remains basically unchanged, and the final unlocking force required is also basically the same. This allows the same structure to adapt to different load conditions, improving the adaptability of the operating mechanism 10.

[0108] Additionally, it should be noted that the deformation of the tripping transmission component 510 and the trip latch 520 (e.g.) Figure 8 As shown, the dashed lines represent the first and second tripping connections and the structural deformation of the components under stress. The stiffness is primarily determined by the rigidity of the parts, which is determined by the shaft thickness, plate thickness, and lever arm length. By designing a reasonable structural match to adjust the stiffness of the components, the direction and magnitude of deformation can be controlled, ensuring that the first and second straight lines corresponding to the overlapping area always influence the latching force with changes in load, thus achieving a close approximation of the latching unlocking force required under different load conditions. Generally, the load is positively correlated with the rated current.

[0109] In a specific implementation, the tripping shaft 513 is thinner than the tripping buckle shaft 523, the thickness of the tripping transmission component 510 is greater than the thickness of the tripping buckle 520, and the lever arm length of the tripping transmission component 510 is greater than the lever arm length of the tripping buckle 520, ultimately ensuring that the stiffness of the two sides of the latch is in a suitable ratio. Because the tripping buckle 520 has extremely high stiffness, under the same load, the deformation of the tripping transmission component 510 is much greater than that of the tripping buckle 520, thus making it the main factor affecting the change in the latch angle.

[0110] Specifically, the thickness of the tripping drive component 510 along the tripping shaft 513 is the first thickness, which determines the amount of rigid deformation of the tripping drive component 510 when it is in contact with the tripping latch 520; the thickness of the tripping latch 520 along the tripping latch shaft 523 is the second thickness, which similarly determines the amount of rigid deformation of the tripping latch 520 when it is in contact with the tripping drive component 510, and thus determines the contact stability of the two when they are in contact.

[0111] It is understandable that the contact pressure between the moving and stationary contacts of the contact assembly 600 is positively correlated with the rated current. In practical applications, the rated current is usually set within a preset current range (e.g., 2000A~6300A, or 5000A~6300A, etc.). Under the condition of the minimum rated current corresponding to the preset current range, the first force indicates that the force limiting the trip 520 can be released. Under the condition of the maximum rated current within the preset current range, the second force indicates that the force limiting the trip 520 can be released. The ratio of the first force to the second force is less than or equal to 1:1.5.

[0112] It is also worth mentioning that when the first stop 511 and the second stop 521 are in contact and not under force, the angle between the first tripping line and the second tripping line is a preset angle; when the circuit is closed and the first stop 511 and the second stop 521 are in contact, the angle between the first tripping line and the second tripping line is the actual angle, which is smaller than the preset angle.

[0113] The ratio of the first thickness to the second thickness is 1:1.2 to 1:2, meaning that the thickness of the trip latch 520 is slightly greater than the thickness of the trip transmission component 510.

[0114] For example, the ratio of the first thickness to the second thickness is 1:1.2. Of course, in other embodiments, the ratio of the first thickness to the second thickness can be other values, which are not specifically limited here.

[0115] It is understandable that when the circuit is closed, the trip latch 520 needs to withstand the thrust from the transmission link 200 for a long time. At this time, the trip latch 520 acts as the receiving end and transmission medium of the force. Its greater thickness helps to suppress the bending deformation generated around the trip latch shaft 523, thereby ensuring that the contact surface of the overlapping part is flat and the pressure distribution is uniform, avoiding limit failure due to local plastic deformation.

[0116] The tripping transmission component 510 mainly serves as a support and release mechanism. Its relatively small thickness reduces its own rotational inertia and improves response sensitivity. It can also quickly release the constraint on the trip latch 520 after the tripping limit component 530 is activated, allowing the trip latch 520 to reliably rebound.

[0117] Thus, the above-mentioned proportional relationship is maintained between the first thickness and the second thickness, so that the tripping transmission component 510 and the trip latch 520 form a rigid-flexible complementary structure in the thickness dimension. That is, the trip latch 520 is thick to ensure the reliability of the limit, while the tripping transmission component 510 is moderately thin to take into account the speed of action. The two work together to support the operating mechanism 10 to maintain the consistency of action and mechanical durability during the reverse compound tripping process.

[0118] Specifically, the tripping transmission component 510 is provided with a first stop part 511, which can be a bearing structure, and the trip latch 520 is provided with a second stop part 521, which can be a groove structure. In the closed state or the energy storage state, the first stop part 511 and the second stop part 521 abut against each other.

[0119] In the closed state, the part where the first stop part 511 and the second stop part 521 abut is the overlapping part. It can be understood that the overlapping part is the actual contact area where the first stop part 511 and the second stop part 521 abut against each other and transmit constraint force in the closed state. Its position directly determines the torque balance state between the opening transmission component 510 and the trip latch 520.

[0120] The distance between the axis of the tripping shaft 513 and the overlapping part is the first distance, which essentially constitutes the lever arm length when the tripping transmission component 510 applies a limiting reaction force to the tripping latch 520 with the tripping shaft 513 as the fulcrum; the distance between the axis of the tripping latch shaft 523 and the overlapping part is the second distance, which corresponds to the resistance arm length generated by the limiting force from the tripping transmission component 510 when the tripping latch 520 rotates around the tripping latch shaft 523.

[0121] In this embodiment, the ratio of the first distance to the second distance is 1:1 to 1:1.5.

[0122] For example, the ratio of the first distance to the second distance is 1:1.2. Of course, in other embodiments, the ratio of the first thickness to the second thickness can be other values, which are not specifically limited here.

[0123] Specifically, when the ratio of the first distance to the second distance is 1:1 to 1:1.5, the resistance arm from the trip lever shaft 523 to the overlapping part is slightly longer than or equal to the drive arm of the trip transmission component 510. If this ratio exceeds the upper limit, i.e., the second distance is too large, the trip lever 520 is prone to loosening after closing due to the leverage effect amplifying small disturbances; if it is below the lower limit, i.e., the first distance is relatively too long, the trip transmission component 510 needs to provide greater force to maintain the limit, increasing structural wear and the risk of false triggering.

[0124] In this way, the contact between the two in the closed state can improve the reliability and anti-interference capability of the operating mechanism 10 in maintaining the closed state without relying on an additional locking structure.

[0125] In addition, the radius ratio of the tripping shaft 513 to the tripping shaft 523 is 1:1.2 to 1:2.

[0126] For example, the radius ratio of the tripping shaft 513 to the tripping shaft 523 is 1:1.2. Of course, in other embodiments, the ratio of the first thickness to the second thickness can be other values, which are not specifically limited here.

[0127] Specifically, the trip latch 520 needs to form a stable contact with the trip transmission component 510 when the circuit is closed, and quickly disengage after the trip is triggered. This action depends on the rotational inertia and response sensitivity of the trip latch 520 around the trip latch shaft 523. If the radius of the trip latch shaft 523 is too small, the shaft rigidity is insufficient, and it is easy to undergo micro-deformation under repeated impacts, resulting in the displacement of the overlapping part and affecting the reliability of the limit switch. If it is too large, it will occupy the internal space of the mounting component 100 and squeeze the motion envelope area of ​​the transmission link 200.

[0128] The tripping shaft 513 needs to balance torque bearing capacity and rotational flexibility when transmitting tripping commands. Its radius must ensure bending stiffness while avoiding interference with adjacent structures. During this process, when the tripping transmission component 510 rotates through the tripping shaft 513 and drives the trip latch 520 to swing around the trip latch shaft 523, the relative radial dimensions of the two shafts jointly determine the lever arm ratio between the swing center of the trip latch 520 and the driving point of the tripping transmission component 510, thus affecting the magnitude of the driving force required for the trip latch 520 to unlock and the consistency of its stroke.

[0129] In this way, by controlling the radius ratio of the tripping shaft 513 to the tripping shaft 523 within the range of 1:1.2 to 1:2, it can ensure that the tripping shaft 523 has sufficient structural rigidity to maintain the overlap accuracy, and also allow the tripping shaft 513 to retain a reasonable margin to accommodate assembly tolerances and material tolerances. At the same time, it can avoid local stress concentration or motion interference caused by excessive difference between the two shaft diameters.

[0130] It should be noted that the deformation of the tripping transmission component 510 and the trip latch 520 (e.g.) Figure 8 As shown, the dashed lines represent the first and second tripping connections and the structural deformation of the components under stress. The stiffness is primarily determined by the rigidity of the parts, which is determined by the shaft thickness, plate thickness, and lever arm length. By designing a reasonable structural match to adjust the stiffness of the components, the direction and magnitude of deformation can be controlled, ensuring that the first and second straight lines corresponding to the overlapping area always influence the latching force with changes in load, thus achieving a close approximation of the latching unlocking force required under different load conditions. Generally, the load is positively correlated with the rated current.

[0131] In a specific implementation, the tripping shaft 513 is thinner than the tripping buckle shaft 523, the thickness of the tripping transmission component 510 is greater than the thickness of the tripping buckle 520, and the lever arm length of the tripping transmission component 510 is greater than the lever arm length of the tripping buckle 520, ultimately ensuring that the stiffness of the two sides of the latch is in a suitable ratio. Because the tripping buckle 520 has extremely high stiffness, under the same load, the deformation of the tripping transmission component 510 is much greater than that of the tripping buckle 520, thus making it the main factor affecting the change in the latch angle.

[0132] Unlocking requires applying torque to the trip limit component. This torque can be applied via the trip button or the trip unit. The latching torque between the tripping actuator and the trip limit component is positively correlated with the latching torque between the tripping actuator and the trip latch. The latching torque between the trip latch and the tripping actuator is related to the force exerted by the trip latch on the tripping actuator and the latching angle. The force is also related to the total contact pressure of the moving and stationary contacts (which can be understood as the sum of the contact pressures of one or more phases' moving and stationary contacts). For example, circuit breakers with larger frame sizes require relatively larger forces, while those with smaller frame sizes require relatively smaller forces. Therefore, the force transmitted to the trip and tripping actuators in a large-frame circuit breaker is relatively large, while the force transmitted to the trip and tripping actuators in a small-frame circuit breaker is relatively small. Because the force is large, the change in the latching angle of a large-frame circuit breaker is greater than that of a small-frame circuit breaker. That is, the actual latching angle of a large-frame circuit breaker is smaller than that of a small-frame circuit breaker. Therefore, the ratio of the torque between the trip and tripping actuators is between 1:1.5 for small-frame and large-frame circuit breakers. Consequently, the maximum unlocking force between the tripping actuator and the tripping limit device in both small-frame and large-frame circuit breakers is within 1:1.5, that is, less than or equal to 1:1.5.

[0133] Under light load conditions, the deformation of both the trip lever and the trip latch is minimal, and the latch angle is close to the design value. The torque is the length of the trip lever multiplied by a larger latch angle. Under heavy load conditions, the latch angle is significantly reduced compared to light load conditions, while the latch length remains unchanged. Therefore, the torque on the trip transmission component 510 under heavy load is the same length multiplied by a smaller latch angle, close to the value under light load. This ensures that the torque on the trip transmission component 510 remains essentially constant, and the final unlocking force required is also essentially the same.

[0134] In summary, by making the ratio of the first thickness to the second thickness 1:1.2 to 1:2, the ratio of the first distance to the second distance 1:1 to 1:1.5, and the radius ratio of the tripping shaft 513 to the tripping buckle shaft 523 1:1.2 to 1:2, the structural stiffness of the tripping transmission component 510 and the tripping buckle 520 is kept within a certain proportional range. For example, the stiffness ratio of the two is made to be 1:2 to 1:5, so that when the corresponding force points of the two are subjected to the same load in the direction of the force, the ratio of the deformation of the tripping transmission component 510 to the deformation of the tripping buckle 520 is 1:5-1:2. Thus, under different load environments, the torque on the tripping transmission component 510 remains basically unchanged, and therefore the unlocking force required by the tripping transmission component 510 and the buckle is also basically the same, thereby improving the adaptability of the operating mechanism 10.

[0135] Furthermore, the trip stop 520 is also provided with a third stop 522, which is adjacent to the second stop 521. The second stop 521 and the third stop 522 are arranged approximately around the rotation axis of the trip stop 520. The third stop 522 can also be a groove structure. In the open state, the first stop 511 abuts against the third stop 522.

[0136] Furthermore, the tripping assembly 500 also includes a tripping limit member 530, which is movably disposed on the mounting member 100. The tripping limit member 530 is used to move to the movement path of the tripping transmission member 510 to limit the tripping transmission member 510 so that the first stop part 511 of the tripping transmission member 510 can abut against the second stop part 521; or it is used to move to outside the movement path of the tripping transmission member 510 so that the first stop part 511 and the second stop part 521 can disengage, thereby releasing the limiting effect on the trip latch 520.

[0137] In this embodiment, the tripping limiter 530 is a rotating shaft structure, and the part that limits the tripping is a half-shaft structure. In the energy storage state and the closing state, the tripping transmission component 510 is constrained by the tripping limiter 530, thereby constraining the tripping transmission component 510, the tripping latch 520 and the transmission link 200 to their initial positions.

[0138] Therefore, when a tripping operation is required, the tripping limiter 530 can be rotated automatically by the drive mechanism or manually by the operator so that the part of the tripping limiter 530 that is limiting the tripping transmission component 510 is moved away from the tripping transmission component 510, thereby releasing the constraint on the tripping transmission component 510, so that the transmission link 200 can drive the contact assembly 600 to move to the tripping state.

[0139] To prevent the tripping drive 510 from moving excessively after the tripping limiter 530 releases its constraint on the tripping drive 510, the tripping drive 510 is also provided with a fourth stop 512. When the tripping limiter 530 moves outside the movement path of the tripping drive 510, after the first stop 511 and the second stop 521 disengage, the fourth stop 512 abuts against the cover plate 120 of the mounting member 100. That is, the cover plate 120 of the mounting member 100 limits the fourth stop 512, thereby preventing it from continuing to rotate and stopping its movement at a preset safety limit position.

[0140] Furthermore, the tripping transmission component 510 is rotatably mounted on the mounting component 100 via the tripping shaft 513, and the trip buckle 520 is provided with a fourth connecting part, which is connected to the transmission link 200. The tripping transmission component 510 and the trip buckle 520 are arranged sequentially along the first direction.

[0141] Specifically, the tripping drive component 510, the energy storage drive component 320, and the closing drive component 410 are arranged sequentially along the first direction, and the angle between their extension directions and the second direction is less than 30°. The extension direction is the direction of the line connecting the tripping shaft 513 to the part that latches with the tripping limit component 530. For example, the extension direction of the closing drive component 410 is the direction of the line connecting the closing shaft 413 to the fourth limit part 414 that latches with the closing limit component 420. The tripping assembly 500 also includes a tripping shaft 513, and the extension direction of the tripping drive component 510 is the direction of the line connecting the tripping shaft 513 to the limit part that latches with the tripping half shaft.

[0142] The line connecting the rotation center of the tripping transmission member 510 and the tripping limit member 530 is set at an acute angle to the second direction; and / or, the line connecting the second stop 521 and the fourth connecting part is set at an acute angle to the second direction, so that the tripping transmission member 510 and the trip latch 520 extend approximately along the second direction (e.g., the horizontal direction). This not only maximizes the use of the installation space along the first direction to lengthen the lever arm of the tripping transmission member 510 and the trip latch 520, thereby minimizing the release torque, but also reduces the space occupied by the tripping transmission member 510 and the trip latch 520 along the first direction (e.g., the height direction), making the operating mechanism 10 compact and rationally laid out. In some embodiments, the angle between the line connecting the trip latch shaft 523 and the second stop 521, and the line connecting the trip latch shaft 523 and the hinge shaft between the trip latch 520 and the upper connecting rod 210, is greater than or equal to 150° and less than or equal to 180°.

[0143] Furthermore, the tripping transmission component 510 includes two tripping plates, which are connected by a tripping shaft 513 but spaced apart and riveted together. The two ends of the first stop 511 are respectively connected to the two tripping plates, and the first stop 511 is a bearing. The aforementioned first thickness is the axial thickness of a single tripping plate along the tripping shaft 513.

[0144] In some embodiments, the projection of the distance between the two tripping plates along the first direction (X direction in the figure) can cover the projection of the tripping latch 520 and the upper connecting rod 210 of the transmission link 200 along the first direction. This allows at least a portion of the structure of the tripping latch 520 or the transmission link 200 to move between the two tripping transmission members 510 during the transition from the closed state to the open state. This increases the overlap area of ​​the tripping transmission member 510, the tripping latch 520, and the transmission link 200, further reducing the installation space of the tripping transmission member 510, the tripping latch 520, and the transmission link 200 along the first direction (e.g., the height direction), creating the necessary prerequisite for achieving overall miniaturization.

[0145] It is worth mentioning that one end of the upper connecting rod 210 and one end of the lower connecting rod 230 are rotatably connected by the connecting rod shaft 220. The other end of the upper connecting rod 210 is driven by the trip latch 520 and the tripping transmission component 510. The other end of the lower connecting rod 230 is driven by the contact assembly 600. The energy storage transmission component 320 is driven by the connecting rod shaft 220.

[0146] In this embodiment, one end of the tripping transmission member 510 abuts against the tripping limit member 530, and the other end is connected to the tripping shaft 513. The first stop part 511 is located between the tripping limit member 530 and the tripping shaft 513. Of course, in other embodiments, the first stop part 511 may also be located on the extension structure of the tripping transmission member 510 away from the tripping limit member 530.

[0147] In summary, this embodiment of the invention provides an operating mechanism 10. In the closed state, the tripping transmission member 510 abuts against the trip latch 520 to limit the trip latch 520, thereby preventing displacement of the transmission link 200 and maintaining the contact assembly 600 in the closed position. When a tripping operation is required, the tripping transmission member 510 is driven to move, causing it to release the limit on the trip latch 520, thus releasing the constraint of the trip latch 520 on the transmission link 200. This allows the transmission link 200 to be driven to the tripping state, ultimately pushing the contact assembly 600 from the closed position. The circuit breaker moves from the closed position to the open position. Furthermore, by setting the first and second open connection lines at an angle, with the angle negatively correlated with the contact pressure between the moving and stationary contacts of the contact assembly 600, the greater the pressure on the contact assembly 600 when closed, the smaller the overlap error caused by deformation between the open transmission component 510 and the trip latch 520. This ensures the overlap angle remains anchored near the design value, preventing large deformations in the first stop part 511 and the second stop part 521, thus effectively improving the overlap stability between the open transmission component 510 and the trip latch 520. Therefore, the operating mechanism 10 provided in this embodiment has a simple structure, few components, and can reliably maintain the closed state. Upon receiving an open command, it quickly and stably drives the contact assembly 600 to complete the open action, effectively improving the stability and reliability of the operating mechanism 10.

[0148] Furthermore, embodiments of the present invention also provide a circuit breaker, including the operating mechanism 10 as described in the above embodiments.

[0149] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An operating mechanism (10), characterized in that, include: Mounting component (100); The circuit breaker transmission component (510) and the circuit breaker rotating shaft (513) are provided. The circuit breaker transmission component (510) is movably mounted on the mounting component (100) via the circuit breaker rotating shaft (513). The circuit breaker transmission component (510) is provided with a first stop part (511). The trip latch (520) and the trip latch shaft (523) are provided. The trip latch (520) is movably mounted on the mounting member (100) via the trip latch shaft (523). The trip latch (520) is provided with a second stop (521). The trip latch (520) is in transmission cooperation with the tripping transmission member (510) to drive the contact assembly (600) to close or open. In the closed state, the first stop (511) abuts against the second stop (521) to limit the trip latch (520), and the part where the first stop (511) abuts against the second stop (521) is the overlapping part. The line connecting the center of the first stop (511) and the axis of the tripping shaft (513) is the first tripping line. The normal line corresponding to the first stop (511) or the second stop (521) at the overlapping part is the second tripping line. The first tripping line and the second tripping line are set at an angle, and the angle is negatively correlated with the contact pressure between the moving contact and the stationary contact of the contact assembly (600). In the open state, the tripping transmission member (510) releases the limit on the trip latch (520).

2. The operating mechanism (10) according to claim 1, characterized in that, The thickness of the tripping transmission component (510) along the tripping shaft (513) is the first thickness, and the thickness of the tripping latch (520) along the tripping latch shaft (523) is the second thickness. The ratio of the first thickness to the second thickness is 1:1.2 to 1:

2. And / or, the distance between the axis of the tripping shaft (513) and the overlapping part is a first distance, and the distance between the axis of the tripping shaft (523) and the overlapping part is a second distance, and the ratio of the first distance to the second distance is 1:1 to 1:1.5; And / or, the radius ratio of the tripping shaft (513) to the tripping buckle shaft (523) is 1:1.2 to 1:

2.

3. The operating mechanism (10) according to claim 2, characterized in that, The ratio of the first thickness to the second thickness is 1:1.2; And / or, the ratio of the first distance to the second distance is 1:1.2; And / or, the radius ratio of the tripping shaft (513) to the tripping shaft (523) is 1:1.

2.

4. The operating mechanism (10) according to claim 3, characterized in that, The tripping transmission component (510) includes two parallel tripping plates riveted together at intervals, and the first thickness is the axial thickness of a single tripping plate along the tripping shaft (513).

5. The operating mechanism (10) according to claim 1, characterized in that, Under the minimum rated current condition within the preset current range, the first force represents the force that can release the limiting force on the trip button (520). Under the maximum rated current condition within the preset current range, the second force represents the force that can release the limiting force on the trip button (520). The ratio of the maximum first force to the maximum second force is less than or equal to 1:1.

5.

6. The operating mechanism (10) according to any one of claims 1-5, characterized in that, The stiffness ratio of the tripping transmission component (510) to the stiffness of the trip lever (520) is 1:2 to 1:

5.

7. The operating mechanism (10) according to claim 1, characterized in that, When the first stop (511) and the second stop (521) are in contact and not under force, the angle between the first tripping line and the second tripping line is a preset angle; when the circuit is closed and the first stop (511) and the second stop (521) are in contact, the angle between the first tripping line and the second tripping line is an actual angle, which is smaller than the preset angle.

8. The operating mechanism (10) according to claim 7, characterized in that, The deformation corresponding to the actual included angle is positively correlated with the contact pressure between the moving contact and the stationary contact of the contact assembly (600).

9. The operating mechanism (10) according to claim 1, characterized in that, The trip latch (520) is also provided with a third stop (522). During the tripping process, the first stop (511) abuts against the third stop (522) to limit the trip latch (520).

10. The operating mechanism (10) according to claim 1, characterized in that, The operating mechanism (10) further includes a tripping limit member (530), which is movably disposed on the mounting member (100). The tripping limit member (530) is used to move to the movement path of the tripping transmission member (510) to limit the tripping transmission member (510) so that the first stop (511) of the tripping transmission member (510) can abut against the second stop (521); or it is used to move to the outside of the movement path of the tripping transmission member (510) so that the first stop (511) and the second stop (521) can disengage to release the limiting effect on the tripping latch (520).

11. A circuit breaker, characterized in that, Includes the operating mechanism (10) as described in any one of claims 1-10.

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