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 energy storage assembly and a closing transmission piece. The energy storage assembly comprises an energy storage piece and an energy storage locking piece. The energy storage locking piece is rotatably arranged on the mounting piece and is in transmission cooperation with the energy storage piece, and is used for driving the energy storage piece to move to an energy storage state. The energy storage locking piece is provided with a first limiting part. The closing transmission piece is rotatably arranged on the mounting piece. The closing transmission piece is provided with a second limiting part. The center line of the closing transmission piece and the center of the second limiting part is a second connecting line. A straight line passing through the center of the second limiting part and being perpendicular to the first limiting part is a first connecting line. The first connecting line and the second connecting line are arranged at an included angle, and the angle of the included angle is negatively correlated with the energy storage spring force of the energy storage piece. It can be seen that the operating mechanism has simple structure, small number of parts, can reliably maintain the closing state, and effectively improves the adaptability, 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 202611311655X 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 energy storage state and quickly and stably drive the contact assembly to complete the closing action when a closing 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; An energy storage component, comprising an energy storage element and an energy storage locking element, wherein the energy storage locking element is provided with an energy storage rotating shaft, the energy storage locking element is rotatably disposed on the mounting component via the energy storage rotating shaft and is in transmission cooperation with the energy storage element to drive the energy storage element to move to an energy storage state, and the energy storage locking element is provided with a first limiting part; A closing transmission component is provided, wherein the closing transmission component is provided with a closing shaft, and the closing transmission component is rotatably mounted on the mounting component via the closing shaft. The closing transmission component is provided with a second limiting part. In the energy storage state, the second limiting part abuts against the first limiting part to lock the energy storage locking component and the energy storage component in the energy storage state; when the second limiting part is disengaged from the first limiting part, the energy is released. The line connecting the center of the closing shaft and the center of the second limiting part is the second connecting line, and the straight line passing through the center of the second limiting part and perpendicular to the first limiting part is the first connecting line. The first connecting line and the second connecting line are set at an angle, and the size of the angle is negatively correlated with the energy storage spring force of the energy storage device.

[0007] In an optional embodiment, the ratio of the radius of the closing shaft to the radius of the energy storage shaft is 1:1 to 1:1.5; And / or, the thickness of the closing transmission component along the closing shaft is a first thickness, and the thickness of the energy storage locking component along the energy storage shaft is a second thickness, wherein the ratio of the first thickness to the second thickness is 1:1 to 1:1.5; And / or, in the energy storage state, the part where the first limiting part and the second limiting part abut against each other is an overlapping part, the distance between the axis of the closing shaft and the overlapping part is a first distance, the distance between the axis of the energy storage 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.

[0008] In an optional embodiment, the ratio of the radius of the closing shaft to the radius of the energy storage shaft is 1:1.3; And / or, the ratio of the first thickness to the second thickness is 1:1.3; And / or, the ratio of the first distance to the second distance is 1:1.3.

[0009] In an optional embodiment, the closing transmission component includes two parallel and spaced riveted closing plates, the first thickness being the axial thickness of the closing plates along the closing shaft; and / or, the energy storage locking component includes a first cam, the first cam being provided with the first limiting portion, and the second thickness being the axial thickness of the first cam along the energy storage shaft.

[0010] In an optional implementation, under the minimum rated current condition within a preset current range, the first force represents the force that can release the limiting force on the energy storage locking element; under the maximum rated current condition within a preset current range, the second force represents the force that can release the limiting force on the energy storage locking element; and the ratio of the maximum first force to the maximum second force is less than or equal to 1:3.

[0011] In an optional embodiment, the stiffness ratio of the energy storage locking component to the stiffness of the closing transmission component is 1:1 to 1:3.

[0012] In an optional embodiment, when the first limiting part and the second limiting part are in contact, a straight line passing through the center of the second limiting part and perpendicular to the first limiting part is a first connecting line, and the line connecting the rotation center of the closing transmission component and the center of the second limiting part is a second connecting line; when the first limiting part and the second limiting part are not under force, the angle between the first connecting line and the second connecting line is an overlap angle; when the first limiting part and the second limiting part are in contact, the angle between the first connecting line and the second connecting line is an actual overlap angle, and the actual overlap angle is smaller than the overlap angle.

[0013] In an optional implementation, the difference between the actual overlap angle and the overlap angle corresponding to the larger energy storage spring force is greater than the difference between the actual overlap angle and the overlap angle corresponding to the smaller energy storage spring force.

[0014] In an optional embodiment, the first limiting part is planar, the second limiting part is a shaft structure, the first connecting line is a straight line passing through the axis of the second limiting part and perpendicular to the plane where the first limiting part is located, and the second connecting line is the line connecting the rotation center of the closing transmission component and the axis of the second limiting part.

[0015] In an optional embodiment, in the energy storage state and when the first limiting part and the second limiting part are in contact, the first limiting part is located between the second limiting part and the rotation center of the closing transmission member.

[0016] In an optional embodiment, the operating mechanism further includes a closing limit member, which is movably disposed on the mounting member. The closing limit member is used to move into the movement path of the closing transmission member to limit the closing transmission member so that the first limiting part of the closing transmission member can abut against the second limiting part; or it is used to move outside the movement path of the closing transmission member to disengage the first limiting part from the second limiting part in the energy storage state.

[0017] In an optional embodiment, when the closing limit member moves to the movement path of the closing transmission member, the end of the closing transmission member abuts against the closing limit member, and when the first limiting part abuts against the second limiting part, the closing limit member is located on the side of the second limiting part away from the first limiting part.

[0018] In an optional embodiment, the closing transmission component is further provided with a third limiting part, which abuts against the base of the mounting component when the closing limiting part moves outside the movement path of the closing transmission component and after the first limiting part and the second limiting part disengage.

[0019] In an optional embodiment, the energy storage component further includes an energy storage transmission component, which is movably disposed on the mounting component, with one end engaging with the energy storage component and the other end engaging with the energy storage locking component. The closing limit component is located within the acute angle region formed by the energy storage component and the energy storage transmission component.

[0020] In an optional embodiment, the closing limiter is located within the area enclosed by the energy storage component, the energy storage transmission component, and the energy storage locking component.

[0021] In an optional embodiment, the energy storage component further includes an energy storage transmission component, which is movably disposed on the mounting component, with one end engaging with the energy storage component and the other end engaging with the energy storage locking component. The closing limit component is located between the energy storage component and the energy storage locking component, and the closing limit component is located on the side of the energy storage locking component away from the energy storage transmission component.

[0022] In a second aspect, the present invention provides a circuit breaker including an operating mechanism as described in any of the foregoing embodiments.

[0023] The beneficial effects of the operating mechanism and circuit breaker provided in this embodiment of the invention include: in the energy storage state, the second limiting part abuts against the first limiting part to lock the energy storage locking member and the energy storage member in the energy storage state. When a closing operation is required, the second limiting part is driven to disengage from the first limiting part to release the locking of the energy storage locking member, so that the energy storage member can release energy to the energy release state, thereby driving the contact assembly to close the circuit through the transmission link. In addition, since the line connecting the center of the closing shaft and the center of the second limiting part is the second line, and the straight line passing through the center of the second limiting part and perpendicular to the first limiting part is the first line, the first line and the second line are set at an angle, and the angle is negatively correlated with the energy storage spring force of the energy storage member, thereby effectively improving the connection stability of the closing transmission member and the energy storage locking member, and thus adapting to circuit breakers of different sizes, and ensuring that the force required to disengage different circuit breakers is small. As can be seen, the operating mechanism provided by the embodiments of the present invention has a simple structure and few parts, can reliably maintain the closed state, and can 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. Attached Figure Description

[0024] 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.

[0025] 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 tripping component provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the stress deformation of the tripping component provided in an embodiment of the present invention.

[0026] 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 rotating shaft ; 334-First cam; 335-Second cam; 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

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] Please see Figures 1 to 7 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.

[0036] 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.

[0037] 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.

[0038] 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 component 600 to close rapidly to complete the circuit breaker.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] The energy storage transmission component 320 is a plate-shaped lever mechanism with two rotational degrees of freedom. Its first connecting part 321 is a rotating shaft structure, 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 a 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.

[0045] The closing assembly 400 includes a closing transmission component 410 and a closing limit component 420, both of which are rotatably mounted on the mounting component 100.

[0046] The closing transmission component 410 is movably mounted on the mounting component 100 and directly or indirectly engages with the energy storage transmission component 320 through an overlapping connection. Therefore, by engaging the closing transmission component 410 with the energy storage transmission component 320, the constraint on the energy storage transmission component 320 is released, allowing the energy storage component 310 to release energy, thereby driving the energy storage transmission component 320 to move the transmission link 200 to the closed state. The closing transmission component 410 is linear.

[0047] It is worth mentioning that the second limiting part 411 and the fourth limiting part 414 are located on one side of the center line connecting the first connecting part 321 and the second connecting part 322. In some embodiments, the entire closing transmission member 410 is 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 connecting the center of the first connecting part 321 and the center of the second connecting part 322. This keeps the closing transmission member 410 away from and avoids 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] It should be noted that the phrase "the tripping transmission component 510 drives the transmission link 200 to move to the tripping state" can refer to the tripping transmission component 510 directly or indirectly applying a driving force to the transmission link 200 to drive the transmission link 200 to move; alternatively, a driving component can be provided on the transmission link 200, which can be a return spring. That is, the driving component 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 disengage from the engagement with the transmission link to indirectly drive the transmission link to move to the tripping state through the driving component.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] Furthermore, in the energy storage state, the extending directions of the opening drive component 510, the energy storage drive component 320, and the closing drive component 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.

[0057] In the energy storage closed state, the angle 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°.

[0058] 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°.

[0059] 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°.

[0060] 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°.

[0061] 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.

[0062] 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.

[0063] 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 causing the contact assembly 600 to close. In the closed state, the first energy storage contact 323 separates from the transmission link 200.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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. In the energy storage state, the first limiting part 332 abuts against the second limiting part 411, thereby constraining the energy storage locking member 330 in the energy storage state, and limiting the energy storage transmission member 320 through the energy storage locking member 330, thereby constraining the energy storage transmission member 320 and the energy storage member 310 in the energy storage state.

[0075] 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.

[0076] 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.

[0077] 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 The dashed line A shown can also be called the first connection line. 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 in the dashed line A). Figure 6 The dotted line B shown can also be called the second connection line. 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, in 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.

[0078] It is also worth mentioning that the deformation of the two components can be controlled by designing the stiffness of the closing transmission component 410 and the energy storage locking component 330, thereby controlling the actual overlap angle and ultimately controlling the unlocking force between the two components to within 1:3. This means the actual overlap angle is smaller than the actual overlap angle. It should be noted that under heavy 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 differs significantly. This causes a large change in the overlap angle between 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 disengage, and in severe cases, disengagement may be impossible. If the angle is too small, it may cause frictional self-locking between the first limiting part 332 and the second limiting part 411, also preventing disengagement.

[0079] 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 frames.

[0080] In this embodiment, by selecting energy storage locking component 330 and closing transmission component 410 with the same material and structural rigidity, the reliability and stability of their connection are ensured.

[0081] Furthermore, when the first limiting part 332 and the second limiting part 411 are in contact, it is in an energy storage state, and the first limiting part 332 is located between the second limiting part 411 and the rotation center of the closing transmission member 410.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] Of course, the closing limit component 420 can also be located in the area enclosed by the energy storage component 310, the energy storage transmission component 320 and the energy storage locking component 330, thereby making 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.

[0087] 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.

[0088] 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 6 The 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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 process of switching 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.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] To achieve universality of parts for different housings, the deformation of the two components can be controlled by designing the stiffness of the closing transmission component 410 and the energy storage locking component 330, thereby controlling the actual overlap angle and ultimately controlling the unlocking force of the two components within 1:3.

[0097] In layman's terms, the deformation of the closing transmission component 410 and the energy storage locking component 330 is mainly determined by the stiffness of the components. The stiffness is mainly determined by the shaft thickness, plate thickness, lever arm length, etc. By designing a reasonable structural match to adjust the stiffness of the two, the direction and magnitude of the deformation can be controlled, so that the first and second straight lines corresponding to the overlapping part always affect the latching force with the change of load, so that the latching unlocking force required under different load conditions is the same or close, with a ratio within the range of 1:3.

[0098] For example, the closing shaft 413 is made thinner than the energy storage shaft 333, the thickness of the closing transmission component 410 is greater than the thickness of the energy storage locking component 330, and the lever arm length of the closing transmission component 410 is greater than the lever arm length of the energy storage locking component 330, so that the stiffness of the two sides of the latch is in a suitable ratio.

[0099] Specifically, the ratio of the radius of the closing shaft 413 to the radius of the energy storage shaft 333 is 1:1 to 1:1.5. For example, in this embodiment, the ratio of the radius of the closing shaft 413 to the radius of the energy storage shaft 333 is 1:1.3.

[0100] The thickness of the closing transmission component 410 along the closing shaft 413 is the first thickness, and the thickness of the energy storage locking component 330 along the energy storage shaft 333 is the second thickness. The ratio of the first thickness to the second thickness is 1:1 to 1:1.5. For example, in this embodiment, the ratio of the first thickness to the second thickness is 1:1.3.

[0101] In the energy storage state and with the first limiting part 332 and the second limiting part 411 in contact, the first limiting part 332 is located between the second limiting part 411 and the rotation center of the closing transmission member 410.

[0102] In the closed state, the part where the first limiting part 332 and the second limiting part 411 abut is the overlapping part. The distance between the axis of the closing shaft 413 and the overlapping part is the first distance, and the distance between the axis of the energy storage shaft 333 and the overlapping part is the second distance. The ratio of the first distance to the second distance is 1:1 to 1:1.5. For example, in this embodiment, the ratio of the first distance to the second distance is 1:1.3.

[0103] The stiffness ratio of the preferred energy storage locking component 330 to the stiffness of the closing transmission component 410 is 1:1 to 1:3.

[0104] Furthermore, 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 energy storage locking element 330; 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 energy storage locking element 330; and the ratio of the maximum first force to the maximum second force is less than or equal to 1:3.

[0105] Under normal circumstances, the energy storage spring force 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). Under the minimum rated current condition corresponding to the preset current range, the first force represents the force that can release the limiting force on the energy storage locking component 330. Under the maximum rated current condition within the preset range, the second force represents the force that can release the limiting force on the energy storage locking component 330. The ratio of the maximum first force to the maximum second force is less than or equal to 1:3, that is, the unlocking force of the two is controlled within 1:3.

[0106] Because the energy storage locking component 330 has extremely high rigidity, the deformation of the closing transmission component 410 under the same load is much greater than that of the energy storage locking component 330, thus making it the main factor affecting the change of the latch angle.

[0107] Under light load conditions, the deformation of both components is minimal, and their latching angle is closer to the design value. The torque is the light load force multiplied by the length of the closing transmission component 410 multiplied by a larger latching angle. Under heavy load conditions, the latching angle decreases significantly, while the latching length remains unchanged. Therefore, the torque of the closing transmission component 410 under heavy load is the heavy load force multiplied by the same length multiplied by a smaller latching angle, which is close to the value under light load conditions. This ensures that the torque on the closing transmission component 410 remains essentially constant, and the final unlocking force required can be essentially the same, i.e., 1:1. Alternatively, the ratio of the maximum unlocking force under light load and heavy load conditions can be greater than 1:1 and less than 1:3.

[0108] In general, unlocking requires applying a torque to the closing limit element 420. This torque can be applied via the closing button or the trip unit. The latching torque between the closing transmission element 410 and the closing limit element 420 is positively correlated with the latching torque between the closing transmission element 410 and the energy storage locking element 330. The latching torque between the energy storage locking element 330 and the closing transmission element 410 is related to the force exerted by the energy storage locking element 330 on the closing transmission element 410 and the latching angle. The force is also related to the energy storage spring force. For example, the energy storage spring force is relatively large for circuit breakers with large frames and relatively small for circuit breakers with small frames. Therefore, the force transmitted to the energy storage lock in a large frame circuit breaker is relatively large. The forces on the stop element 330 and the closing transmission element 410 are relatively large, while the forces transmitted to the energy storage locking element 330 and the closing transmission element 410 in the small frame circuit breaker are relatively small. Because the force is large, the change in the latching angle of the large frame circuit breaker is greater than that of the small frame circuit breaker. That is, the actual latching angle of the large frame circuit breaker is smaller than that of the small frame circuit breaker. Therefore, the ratio of the torque between the energy storage locking element 330 and the closing transmission element 410 is between 1:1.3 for the small frame and the large frame circuit breaker. Consequently, the maximum unlocking force between the closing transmission element 410 and the closing limit element 420 of the small frame and the large frame circuit breaker is between 1:1.3.

[0109] It is understandable that the difference between the actual overlap angle and the overlap angle corresponding to a large energy storage spring force is greater than the difference between the actual overlap angle and the overlap angle corresponding to a small energy storage spring force. In other words, the amount of deformation between the actual overlap angle and the overlap angle caused by a large energy storage spring force is greater than that caused by a small energy storage spring force.

[0110] Furthermore, such as Figure 1 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 number of first cams 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 a... A second limiting part 411, a closing transmission member 410 rotatably mounted on the mounting member 100 via a closing shaft 413, a first cam 334 and a second cam 335 rotatably mounted on the mounting member 100 via an energy storage shaft 333, an energy storage transmission member 320 rotatably mounted on the mounting member 100 via a first connecting part 321, and an energy storage locking member 330 correspondingly engaging with the energy storage transmission member 320, and the closing transmission member 410 engaging with at least one energy storage locking member 330. In this case, the first thickness of the closing transmission member along the axial direction of the closing shaft 413 is the thickness of the single closing piece, and the second thickness of the energy storage locking member along the axial direction of the energy storage shaft 333 is the thickness of the first cam 334.

[0111] 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; 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.

[0112] Therefore, the operating mechanism 10 provided in this embodiment of the invention has a simple structure and requires few components. It can reliably maintain the closed state and quickly and stably drive the contact assembly 600 to complete the opening action when a opening command is received, effectively improving the stability and reliability of the operating mechanism 10. When the operating mechanism 10 is in the closed state, the opening 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 constrained and cannot rotate around its own rotation axis.

[0113] 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.

[0114] 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, the first stop part 511 and the second stop part 521 abut against each other.

[0115] 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.

[0116] 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.

[0117] Furthermore, the tripping assembly 500 also includes a tripping limiter 530, which is movably disposed on the mounting member 100. The tripping limiter 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 closing transmission member 410 so that the first stop 511 and the second stop 521 can disengage, thereby releasing the limiting effect on the trip latch 520.

[0118] 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.

[0119] 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.

[0120] To prevent the tripping drive 510 from moving excessively after the tripping limiter 530 contacts the 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.

[0121] 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.

[0122] 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.

[0123] 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 part 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 tripping 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 tripping latch 520, thereby minimizing the release torque, but also reduces the space occupied by the tripping transmission member 510 and the tripping latch 520 along the first direction (e.g., the height direction), making the operating mechanism 10 compact and rationally laid out.

[0124] Furthermore, the tripping transmission component 510 includes two tripping plates, which are connected by a tripping shaft 513 but spaced apart. The two ends of a first stop 511 are respectively connected to the two tripping plates, and the first stop 511 is a bearing. It can be understood that, in this case, the third thickness is the thickness of a single tripping plate along the axial direction of the tripping shaft 513.

[0125] 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.

[0126] 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.

[0127] Furthermore, the tripping assembly 500 also includes a tripping lever shaft 523, through which the tripping lever 520 is rotatably mounted on the mounting member 100.

[0128] 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.

[0129] 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 8 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 8 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 510, and the direction corresponding to the second tripping connection is the direction of force on the tripping transmission component 510.

[0130] 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.

[0131] 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, large deformations of the first stop part 511 and the second stop part 521 can be avoided. Therefore, the connection stability of the tripping transmission component 510 and the trip latch 520 can be effectively improved. More importantly, it is beneficial to achieve the commonality of operating mechanism 10 parts for different frame circuit breakers.

[0132] 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.

[0133] 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.

[0134] 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.

[0135] Specifically, the thickness of the tripping drive component 510 along the tripping shaft 513 is the third 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 fourth 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.

[0136] The ratio of the third thickness to the fourth 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.

[0137] For example, the ratio of the third thickness to the fourth thickness is 1:1.2. Of course, in other embodiments, the ratio of the third thickness to the fourth thickness can be other values, which are not specifically limited here.

[0138] 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, and avoiding limit failure due to local plastic deformation.

[0139] 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 tripping latch 520 after the tripping limit component 530 is activated, allowing the tripping latch 520 to reliably rebound.

[0140] Thus, the above-mentioned proportional relationship is maintained between the third thickness and the fourth 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.

[0141] 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.

[0142] In this embodiment, the ratio of the first distance to the second distance is 1:1 to 1:1.5.

[0143] For example, the ratio of the first distance to the second distance is 1:1.2. Of course, in other embodiments, the first distance and the second distance can be other ratios, which are not specifically limited here.

[0144] 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.

[0145] 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.

[0146] In addition, the radius ratio of the tripping shaft 513 to the tripping shaft 523 is 1:1.2 to 1:2.

[0147] 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 third thickness to the fourth thickness can be other values, which are not specifically limited here.

[0148] 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.

[0149] 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.

[0150] Thus, 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, preferably 1:1.2, it is possible to ensure that the tripping shaft 523 has sufficient structural rigidity to maintain the overlap accuracy, while allowing the tripping shaft 513 to retain a reasonable margin to accommodate assembly tolerances and material tolerances. At the same time, it avoids local stress concentration or motion interference caused by excessive difference between the two shaft diameters.

[0151] 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). Under the minimum rated current condition corresponding to the preset current range, the first force indicates that the force limiting the trip 520 can be released. Under the maximum rated current condition 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.

[0152] In general, unlocking requires applying torque to the trip limit element 530. This torque can be applied via the trip button or the trip unit. The latching torque between the trip transmission element 510 and the trip limit element 530 is positively correlated with the latching torque between the trip transmission element 510 and the trip latch 520. The latching torque between the trip latch 520 and the trip transmission element 510 is related to the force exerted by the trip latch 520 on the trip transmission element 510 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 of moving and stationary contacts). For example, the force corresponding to a large frame circuit breaker is relatively large, while the force corresponding to a small frame circuit breaker is relatively large. The forces transmitted to the trip latch 520 and the tripping actuator 510 in a large-frame circuit breaker are relatively large, while those transmitted to the trip latch 520 and the tripping actuator 510 in a small-frame circuit breaker are relatively small. Because the force is greater in a large-frame circuit breaker, the change in the latch angle is greater than that in a small-frame circuit breaker. That is, the actual latch angle of the large-frame circuit breaker is smaller than that of the small-frame circuit breaker. Therefore, the ratio of the torque between the trip latch 520 and the tripping actuator 510 is between 1:1.5 for the small-frame and large-frame circuit breakers. Consequently, the maximum unlocking force between the tripping actuator 510 and the tripping limiter 530 of both the small-frame and large-frame circuit breakers is within 1:1.5, i.e., less than or equal to 1:1.5.

[0153] Under light load conditions, the deformation of both the trip lever and the trip latch 520 is minimal, and their latching angle is close to the design value. The torque is the light load force multiplied by the length of the trip lever multiplied by a larger latching angle. Under heavy load conditions, the latching angle is significantly reduced compared to the light load conditions, while the latching length remains unchanged. Therefore, the torque on the trip transmission component 510 under heavy load is the heavy load force multiplied by the same length multiplied by a smaller latching angle, which is close to the value under light load. This ensures that the torque on the trip transmission component 510 remains basically unchanged, and the final unlocking force required is also basically the same.

[0154] In summary, this embodiment of the invention provides an operating mechanism 10. In the energy storage state, the second limiting part 411 abuts against the first limiting part 332 to lock the energy storage locking member 330 and the energy storage member 310 in the energy storage state. When a closing operation is required, the second limiting part 411 is driven to disengage from the first limiting part 332 to release the locking of the energy storage locking member 330, allowing the energy storage member 310 to release energy to the released state. This, in turn, drives the contact assembly 600 to close the circuit via the transmission link 200. Furthermore, due to the center of the closing shaft 413... The line connecting the center of the second limiting part 411 is the second connecting line, and the straight line passing through the center of the second limiting part 411 and perpendicular to the first limiting part 332 is the first connecting line. The first connecting line and the second connecting line are set at an angle, and the size of the angle is negatively correlated with the energy storage spring force of the energy storage member 310. This avoids large deformation of the second limiting part 411 and the first limiting part 332, thereby effectively improving the connection stability of the closing transmission member 410 and the energy storage locking member 330, and thus adapting to circuit breakers of different sizes, while ensuring that the force required to release the connection between different circuit breakers is small. It can be seen that the operating mechanism 10 provided by the embodiment of the present invention has a simple structure and few parts, can reliably maintain the closed state, and can quickly and stably drive the contact assembly 600 to complete the opening action when receiving the opening command, effectively improving the adaptability, stability and reliability of the operating mechanism 10.

[0155] Furthermore, embodiments of the present invention also provide a circuit breaker, including the operating mechanism 10 as described in the above embodiments.

[0156] 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); An energy storage component (300) includes an energy storage element (310) and an energy storage locking element (330). The energy storage locking element (330) is provided with an energy storage rotating shaft (333). The energy storage locking element (330) is rotatably disposed on the mounting component (100) through the energy storage rotating shaft (333) and is in transmission cooperation with the energy storage element (310) to drive the energy storage element (310) to move to the energy storage state. The energy storage locking element (330) is provided with a first limiting part (332). A closing transmission component (410) is provided with a closing shaft (413). The closing transmission component (410) is rotatably mounted on the mounting component (100) via the closing shaft (413). The closing transmission component (410) is provided with a second limiting part (411). In the energy storage state, the second limiting part (411) abuts against the first limiting part (332) to lock the energy storage locking component (330) and the energy storage component (310) in the energy storage state. When the second limiting part (411) is disengaged from the first limiting part (332), it is in the energy release state. The line connecting the center of the closing shaft (413) and the center of the second limiting part (411) is the second connecting line, and the straight line passing through the center of the second limiting part (411) and perpendicular to the first limiting part (332) is the first connecting line. The first connecting line and the second connecting line are set at an angle, and the size of the angle is negatively correlated with the energy storage spring force of the energy storage component (310).

2. The operating mechanism (10) according to claim 1, characterized in that, The ratio of the radius of the closing shaft (413) to the radius of the energy storage shaft (333) is 1:1 to 1:1.5; And / or, the thickness of the closing transmission component (410) along the closing shaft (413) is a first thickness, and the thickness of the energy storage locking component (330) along the energy storage shaft (333) is a second thickness, and the ratio of the first thickness to the second thickness is 1:1 to 1:1.5; And / or, in the energy storage state, the part where the first limiting part (332) and the second limiting part (411) abut is the overlapping part, the distance between the axis of the closing shaft (413) and the overlapping part is the first distance, the distance between the axis of the energy storage shaft (333) and the overlapping part is the second distance, and the ratio of the first distance to the second distance is 1:1 to 1:1.

5.

3. The operating mechanism (10) according to claim 2, characterized in that, The ratio of the radius of the closing shaft (413) to the radius of the energy storage shaft (333) is 1:1.3; And / or, the ratio of the first thickness to the second thickness is 1:1.3; And / or, the ratio of the first distance to the second distance is 1:1.

3.

4. The operating mechanism (10) according to claim 3, characterized in that, The closing transmission component (410) includes two parallel and spaced riveted closing plates, the first thickness being the axial thickness of the closing plates along the closing shaft (413); and / or, the energy storage locking component (330) includes a first cam (334), the first cam (334) being provided with a first limiting part (332), and the second thickness being the axial thickness of the first cam (334) along the energy storage shaft (333).

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 energy storage locking member (330). 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 energy storage locking member (330). The ratio of the maximum first force to the maximum second force is less than or equal to 1:

3.

6. The operating mechanism (10) according to any one of claims 1-5, characterized in that, The stiffness ratio of the energy storage locking component (330) to the stiffness of the closing transmission component (410) is 1:1 to 1:

3.

7. The operating mechanism (10) according to claim 1, characterized in that, When the first limiting part (332) and the second limiting part (411) are in contact, a straight line passing through the center of the second limiting part (411) and perpendicular to the first limiting part (332) is the first connecting line, and the line connecting the rotation center of the closing transmission member (410) and the center of the second limiting part (411) is the second connecting line; when the first limiting part (332) and the second limiting part (411) are not under force, the angle between the first connecting line and the second connecting line is the overlap angle; when the first limiting part (332) and the second limiting part (411) are in contact, the angle between the first connecting line and the second connecting line is the actual overlap angle, and the actual overlap angle is smaller than the overlap angle.

8. The operating mechanism (10) according to claim 7, characterized in that, The difference between the actual overlap angle and the overlap angle corresponding to the larger energy storage spring force is greater than the difference between the actual overlap angle and the overlap angle corresponding to the smaller energy storage spring force.

9. The operating mechanism (10) according to claim 1, characterized in that, The first limiting part (332) is planar, the second limiting part (411) is a shaft structure, the first connecting line is a straight line passing through the axis of the second limiting part (411) and perpendicular to the plane where the first limiting part (332) is located, and the second connecting line is the line connecting the rotation center of the closing transmission member (410) and the axis of the second limiting part (411).

10. The operating mechanism (10) according to claim 1, characterized in that, In the energy storage state and when the first limiting part (332) and the second limiting part (411) are in contact, the first limiting part (332) is located between the second limiting part (411) and the rotation center of the closing transmission member (410).

11. The operating mechanism (10) according to claim 1, characterized in that, The operating mechanism (10) further includes a closing limit member (420), which is movably 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) can disengage from the second limiting part (411) in the energy storage state. The closing limit member (420) is located on the side of the second limiting part (411) away from the first limiting part (332).

12. The operating mechanism (10) according to claim 11, characterized in that, The energy storage component (300) further includes an energy storage transmission component (320), which is movably disposed on the mounting component (100), with one end engaging with the energy storage component (310) and the other end engaging with the energy storage locking component (330). The closing limit component (420) is located within the acute angle area formed by the energy storage component (310) and the energy storage transmission component (320).

13. The operating mechanism (10) according to claim 12, characterized in that, The closing limiter (420) is located in the area enclosed by the energy storage component (310), the energy storage transmission component (320), and the energy storage locking component (330); Alternatively, the closing limit member (420) may be located between the energy storage member (310) and the energy storage locking member (330), and the closing limit member (420) may be located on the side of the energy storage locking member (330) away from the energy storage transmission member (320).

14. A circuit breaker, characterized in that, Includes the operating mechanism (10) as described in any one of claims 1-13.

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