A circuit breaker operating mechanism and circuit breaker

Abstract

The application relates to the technical field of low-voltage electrical appliances, in particular to a control mechanism of a circuit breaker and the circuit breaker. The control mechanism of the circuit breaker comprises a transmission cantilever, a transmission rod, a mounting shell and a handle. The mounting shell is connected to a shell of the circuit breaker; the transmission cantilever is connected to the transmission rod and a movable contact assembly respectively, and the transmission cantilever can rotate relative to the shell; the handle is connected to one side of the mounting shell away from the shell; the transmission rod is arranged in the mounting shell and inserted into the handle; the handle is used for driving the transmission rod to make linear reciprocating motion, so as to transmit opening and closing power and drive the transmission cantilever to rotate; the transmission cantilever drives the movable contact assembly to make opening and closing motion through rotation. The compact core transmission component replaces the traditional complex connecting rod mechanism, effectively solves the problems of many parts, large space and easy rebound and wear of the traditional mechanism, helps to improve the operation reliability and convenience, and has the advantages of compact structure, fast transmission response and high reliability.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical technology, and in particular to a circuit breaker control mechanism and a circuit breaker. Background Technology

[0002] Existing frame circuit breakers or molded case circuit breakers mostly employ traditional mechanical spring energy storage mechanisms for their operating mechanisms. These mechanisms rely on the interaction of springs, cams, rollers, and numerous pins and connecting rods to achieve the opening and closing of the moving contacts. In practical applications, this technology suffers from at least the following drawbacks: Firstly, the large number of parts (usually around 60) occupies a large amount of structural space, making it difficult to further reduce the overall size of the circuit breaker. Secondly, the rigid part of the mechanical linkage is prone to springback during the opening and closing process, and the output force is poorly controllable, which affects the reliability of the operation. Third, components such as springs, cams, and pins are prone to wear. After tens of thousands of operations, the wear will cause a serious reduction in the consistency of the mechanism, shortening the overall life of the circuit breaker.

[0003] In addition, traditional control mechanisms are difficult to observe due to their enclosed internal components during installation and debugging; and in the absence of power or in special testing scenarios, they lack a simple, intuitive and reliable manual operation structure, which makes maintenance and testing inconvenient. Summary of the Invention

[0004] The purpose of this invention is to provide a control mechanism and circuit breaker for a circuit breaker, so as to solve the technical problems existing in the prior art, such as many parts, large structural space, easy rebound of connecting rods, poor consistency due to wear, and complex manual operation structure and inconvenient operation.

[0005] In a first aspect, the present invention provides a control mechanism for a circuit breaker, comprising: a transmission cantilever, a transmission rod, a mounting housing, and a handle; The mounting housing is connected to the housing of the circuit breaker; The transmission cantilever is connected to the transmission rod and the moving contact assembly of the circuit breaker respectively, and the transmission cantilever can rotate relative to the housing; The handle is connected to the side of the mounting housing opposite to the housing. The transmission rod passes through the mounting housing and is inserted into the handle. The handle is used to drive the transmission rod to make linear reciprocating motion to transmit the opening and closing power and drive the transmission cantilever to rotate. The transmission cantilever drives the moving contact assembly to make opening and closing motions by rotating.

[0006] In an optional embodiment, the handle includes a handle housing and a handle inner housing nested within the handle housing; One end of the transmission rod is connected to the transmission cantilever, and the other end of the transmission rod is connected to the inner shell of the handle, and the inner shell of the handle can slide relative to the outer shell of the handle along the axial direction of the transmission rod; The handle housing is movably connected to the end cap of the mounting shell extending radially along the transmission rod via a movable connection structure, and the handle housing is used to drive the handle inner shell to move axially toward the transmission rod.

[0007] In an optional embodiment, the handle further includes a handle reset element; The handle reset component is disposed between the handle inner shell and the end cap, and is used to drive the handle inner shell to move along the axial direction of the transmission rod in a direction away from the transmission rod.

[0008] In an optional embodiment, the movable connection structure includes at least one handle cantilever seat disposed on the end cap along the circumference of the handle housing, a handle cantilever disposed on the handle cantilever seat, and a spiral groove disposed on the outer wall of the handle housing. The handle cantilever is inserted into the spiral groove to restrict the axial movement of the handle housing along the transmission rod when it rotates.

[0009] In an optional embodiment, two handle cantilever seats are provided, each handle cantilever seat is provided with the handle cantilever, and the two handle cantilever seats are symmetrically arranged with respect to the handle housing; The outer wall of the handle housing is provided with two spiral grooves, and the handle cantilever is inserted into the spiral grooves in a corresponding manner.

[0010] In an optional embodiment, the movable connection structure includes a guide protrusion disposed on the side of the end cap facing the handle housing and a guide groove disposed on the side of the handle housing facing the end cap. The guide protrusion is inserted into the guide groove to restrict the axial movement of the handle housing along the transmission rod when the handle housing rotates, and the guide protrusion can rotate relative to the guide groove within the guide groove when the handle housing rotates.

[0011] In an optional embodiment, the guide protrusion is annular; The guide groove is annular.

[0012] In an optional embodiment, the opening of the spiral groove is provided with scale markings along the spiral direction.

[0013] In an optional embodiment, a drive motor is further included, which is connected to the handle to drive the handle to move, so that the handle drives the transmission rod to perform linear reciprocating motion.

[0014] In a second aspect, the present invention provides a circuit breaker, including the control mechanism of the circuit breaker described in any of the foregoing embodiments.

[0015] Compared with the prior art, the technical advantages of the circuit breaker control mechanism and the circuit breaker provided by the present invention are as follows: The control mechanism provided by the present invention includes: a transmission cantilever, a transmission rod, a mounting shell, and a handle; the mounting shell is connected to the housing of the circuit breaker; the transmission cantilever is connected to the transmission rod and the moving contact assembly of the circuit breaker respectively, and the transmission cantilever can rotate relative to the housing; the handle is connected to the side of the mounting shell away from the housing, the transmission rod passes through the mounting shell and is inserted into the handle, and the handle is used to drive the transmission rod to perform linear reciprocating motion to transmit the opening and closing power and drive the transmission cantilever to rotate, and the transmission cantilever drives the moving contact assembly to perform opening and closing motion through rotation.

[0016] By using only four core components—the transmission cantilever, the transmission rod, the mounting housing, and the handle—to perform the opening and closing functions of the control mechanism, the number of parts is greatly reduced, the overall weight is lightened, and the space occupied is significantly reduced, directly overcoming the shortcomings of traditional mechanisms with many parts and large structural space. At the same time, this solution abandons the traditional energy storage and transmission mode of springs and cams. The handle drives the transmission rod to perform linear reciprocating motion, directly transmitting the opening and closing power to the transmission cantilever. The rotation of the transmission cantilever relative to the housing then drives the moving contact assembly to open and close the circuit breaker. This linear-to-rotary transmission method completely eliminates the rebound hazards and component wear problems caused by the numerous components and spring energy storage in traditional rigid linkage mechanisms. This results in smoother and more controllable power transmission, faster response speed, and fundamentally improves the consistency of circuit breaker operation and the lifespan of the mechanism. In addition, the handle is located on the side of the mounting housing away from the housing, and the transmission rod passes through the mounting housing and is inserted into the handle. This compact structural design provides an intuitive and reliable manual operation path without increasing the volume, solving the problem of inconvenient operation in the absence of power or in special test scenarios, and improving the applicability and maintenance convenience of the circuit breaker.

[0017] The circuit breaker provided by the present invention includes the control mechanism of the circuit breaker described above. Therefore, the technical advantages and effects achieved by the circuit breaker include the technical advantages and effects achieved by the control mechanism of the circuit breaker described above, which will not be described in detail here.

[0018] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the transmission cantilever structure provided in an embodiment of the present invention; Figure 2 A side view of the transmission cantilever provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the connection between the transmission cantilever and the transmission rod provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the cantilever shaft mounting side provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the cantilever shaft mounting on the other side provided in an embodiment of the present invention; Figure 6 Provided for embodiments of the present invention Figure 5 Sectional view of the KK plane; Figure 7 Provided for embodiments of the present invention Figure 5 Sectional view of the JJ plane; Figure 8 This is a schematic diagram of the moving contact assembly tripping according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the moving contact assembly closing according to an embodiment of the present invention; Figure 10 This is a schematic diagram of the handle housing structure provided in an embodiment of the present invention; Figure 11 A schematic diagram of one side of the control mechanism provided in an embodiment of the present invention; Figure 12 This is a schematic diagram of the other side of the control mechanism provided in an embodiment of the present invention; Figure 13 This is a schematic diagram of the handle housing being mounted on the end cap according to an embodiment of the present invention; Figure 14 This is a cross-sectional view of the handle during circuit breaker tripping provided in an embodiment of the present invention; Figure 15 This is a cross-sectional view of the handle during closing, provided in an embodiment of the present invention.

[0021] Icons: 1-Cantilever shaft; 2-Transmission cantilever; 3-Transmission rod; 4-Housing; 5-Moving contact assembly; 6-Transmission rod connecting hole; 7-Transmission cantilever connecting shaft; 8-Bearing; 9-Allowing groove; 10-First clamp; 11-Step section; 12-Second clamp; 13-Cantilever shaft connecting hole; 14-Moving contact assembly connecting hole; 15-Mounting housing; 16-Magnetic control device; 17-Moving iron core; 18-Hand-operated device; 19-Handle; 20-Handle housing; 21-Handle inner housing; 22-End cap; 23-Observation hole; 24-Handle cantilever; 25-Handle cantilever seat; 26-Handle spring; 27-Helical groove; 28-Guide protrusion; 29-Guide groove; 30-Scale marking. Detailed Implementation

[0022] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0026] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0027] The specific structure is as follows: Figures 1 to 15 As shown.

[0028] This embodiment provides a control mechanism for a circuit breaker, including a cantilever shaft 1, a transmission cantilever 2, and a transmission rod 3. The cantilever shaft 1 is disposed in a corresponding mounting position in the circuit breaker housing 4. The transmission cantilever 2 is provided with a cantilever shaft connecting part, a transmission rod connecting part, and a moving contact assembly connecting part. The transmission cantilever 2 is connected to the cantilever shaft 1 through the cantilever shaft connecting part, and the transmission cantilever 2 cooperates with the cantilever shaft 1 to rotate relative to the housing 4 about the axis of the cantilever shaft 1.

[0029] In this embodiment, the cantilever shaft 1 can be fixed to the housing 4, and the transmission cantilever 2 can be rotatably connected to the cantilever shaft 1, so that the transmission cantilever 2 can rotate around the fixed cantilever shaft 1; or the cantilever shaft 1 can be rotatably connected to the housing 4, and the transmission cantilever 2 can be fixedly connected to the cantilever shaft 1, so that when the cantilever shaft 1 rotates, it can synchronously drive the transmission cantilever 2 to rotate.

[0030] The transmission cantilever 2 is connected to the transmission rod 3 via a transmission rod connecting part. In this embodiment, the transmission rod connecting part of the transmission cantilever 2 is specifically configured as a transmission rod connecting hole 6, and a transmission cantilever connecting shaft 7 is fixedly mounted on the transmission rod 3, passing through the transmission rod connecting hole 6. It should be noted that this embodiment is not limited to this; the transmission rod connecting part can also be configured as a U-shaped opening groove or a C-shaped claw structure. During assembly, the transmission cantilever connecting shaft 7 is inserted into the U-shaped groove or C-shaped claw, which can also achieve the connection between the transmission rod 3 and the transmission cantilever 2.

[0031] Furthermore, the transmission rod connecting hole 6 is configured as an elongated hole (e.g., an oblong hole or a waist-shaped hole), and a bearing 8 is fitted onto the transmission cantilever connecting shaft 7 on the transmission rod 3. After assembly, the bearing 8 is located within the elongated hole of the transmission rod connecting hole 6 and rolls against the side wall of the transmission rod connecting hole 6. This elongated hole includes not only straight oblong holes but also arc-shaped slots. When the transmission cantilever 2 rotates around the cantilever shaft 1, the transmission cantilever connecting shaft 7 and the bearing 8 can roll relative to each other within the elongated hole to compensate for assembly errors and interference of the motion trajectory. At the same time, the elongated hole can also limit the transmission cantilever 2 to prevent it from colliding with the mounting housing 15.

[0032] The end of the transmission rod 3 is also provided with a clearance groove 9. The transmission rod connecting part of the transmission cantilever 2 (i.e., the end where the transmission rod connecting hole 6 is located) is inserted into the clearance groove 9. The transmission cantilever connecting shaft 7 passes through the two opposite groove walls of the clearance groove 9, realizing a tight hinge connection between the transmission rod 3 and the transmission cantilever 2. Specifically, the clearance groove 9 is a forked clamping groove, that is, the end of the transmission rod 3 is forked into a claw shape, the end of the transmission cantilever 2 is clamped between the two claws, and the connecting shaft passes through the hole walls of the two claws.

[0033] In this embodiment, the control mechanism further includes a first connecting member disposed on the housing 4. Stepped portions 11 are respectively provided at both ends of the cantilever shaft 1. The first connecting member corresponds one-to-one with each stepped portion 11 and is connected to the stepped portion 11 to limit the axial displacement of the cantilever shaft 1. Specifically, the first connecting member is a first clamp 10, which has a simple structure, is easy to install, and has a good limiting effect. It should be noted that this embodiment is not limited to this; the first connecting member can also be a retaining ring, a shaft end cap, or a locking nut, as long as it can form a stop fit with the stepped portion 11 to achieve the same limiting function.

[0034] In this embodiment, the control mechanism further includes a second connecting member disposed on the housing 4, which connects the two ends of the cantilever shaft 1. Specifically, the second connecting member is a second clamp 12, which has a simple structure, is easy to install, and has a good positioning effect. It should be noted that this embodiment is not limited to this; the second connecting member can also be an intermediate bearing seat or a snap-fit ​​structure to enable the cantilever shaft 1 to be mounted on the housing 4 via the second connecting member.

[0035] The transmission cantilever 2 is connected to the cantilever shaft 1 via a cantilever shaft connecting part. In this embodiment, the cantilever shaft connecting part of the transmission cantilever 2 is specifically configured as a cantilever shaft connecting hole 13, in which the cantilever shaft 1 passes. It should be noted that this embodiment is not limited to this; the cantilever shaft connecting part can also be configured as a U-shaped opening groove or a C-shaped claw structure. During assembly, the cantilever shaft 1 is inserted into the U-shaped groove or the C-shaped claw, which can also achieve the connection between the cantilever shaft 1 and the transmission cantilever 2.

[0036] The transmission cantilever 2 is connected to the moving contact assembly 5 of the circuit breaker via the moving contact assembly connection part. In this embodiment, the moving contact assembly connection part of the transmission cantilever 2 is specifically configured as a moving contact assembly connection hole 14, in which the pivot of the moving contact assembly 5 passes. It should be noted that this embodiment is not limited to this; the moving contact assembly connection part can also be configured as a U-shaped opening groove or a C-shaped claw structure. During assembly, the pivot of the moving contact assembly 5 is inserted into the U-shaped groove or the C-shaped claw, which can also achieve the connection between the pivot of the moving contact assembly 5 and the transmission cantilever 2.

[0037] In this embodiment, the cantilever shaft connection part is located at one end of the transmission cantilever 2, the moving contact assembly connection part is located at the other end of the transmission cantilever 2, and the transmission rod connection part is located between the two ends of the transmission cantilever 2.

[0038] When the control mechanism of this embodiment is working, the driving device (such as the moving iron core 17 of the magnetic control device 16 or the handle 19 of the hand-operated device 18) drives the transmission rod 3 to make it reciprocate linearly in the control mechanism. The transmission rod 3 transmits the opening and closing power to the transmission cantilever 2, directly driving the transmission cantilever 2 to rotate around the axis of the cantilever shaft 1. The rotation of the transmission cantilever 2 further drives the moving contact assembly 5 connected to it, thereby completing the closing or opening operation of the circuit breaker.

[0039] In this embodiment, the driving device specifically includes a magnetic control device 16. The driving device includes a mounting shell 15, which is connected to the housing 4. The transmission rod 3 is inserted into the mounting shell 15, and the magnetic control device 16 is disposed inside the mounting shell 15. To allow for direct observation of the internal cantilever state, an observation section is provided on the side wall of the mounting shell 15 extending axially along the transmission rod 3. The observation section can be an observation hole 23. This observation hole 23 can be used to observe the rotational position of the transmission cantilever 2 to determine the opening and closing status. It can also be used to observe whether the transmission cantilever 2 has been installed in place when the control mechanism is installed to the circuit breaker body.

[0040] The drive unit may also include a manual operating device 18, which includes a handle 19. The handle 19 is connected to the side of the mounting housing 15 opposite to the housing 4. The transmission rod 3 is inserted into the mounting housing 15 and the handle 19. The handle 19 includes a handle outer shell 20 and a handle inner shell 21 nested within the handle outer shell 20. One end of the transmission rod 3 is connected to the transmission cantilever 2, and the other end of the transmission rod 3 is connected to the handle inner shell 21, and the handle inner shell 21 can slide relative to the handle outer shell 20 along the axial direction of the transmission rod 3. In order to observe the axial travel of the transmission rod, an observation part (which can be an observation hole 23) is also provided on the end wall of the handle outer shell 20 extending radially along the transmission rod 3. Through the observation hole 23 on the end wall of the handle outer shell 20, the specific position of the linear movement of the handle inner shell 21 along the axial direction of the transmission rod 3 can be observed, so as to directly determine whether the mechanism is in the closed or open state.

[0041] It should be noted that the drive device may include only the magnetic control device 16, or only the manual control device 18, or both the magnetic control device 16 and the manual control device 18. When the drive device includes only the magnetic control device 16 or both the magnetic control device 16 and the manual control device 18, the mounting shell 15 is the magnetic control housing of the magnetic control device 16. When the drive device includes only the manual control device 18, the mounting shell 15 is the housing for mounting the manual control device 18.

[0042] It should be further noted that when the drive device includes both the magnetic control device 16 and the manual control device 18, the observation section can be configured in three specific ways: first, the observation section is only provided on the mounting housing 15; second, the observation section is only provided on the handle 19; and third, the observation sections are provided on both the mounting housing 15 and the handle 19. The appropriate method can be chosen based on the specific application requirements.

[0043] In this embodiment, the handle 19 includes a handle housing 20 and a handle inner housing 21 nested within the handle housing 20. One end of the transmission rod 3 is connected to the transmission cantilever 2, and the other end of the transmission rod 3 is connected to the handle inner housing 21. The handle inner housing 21 can slide relative to the handle housing 20 along the axial direction of the transmission rod 3. Through the sliding engagement between the handle housing 20 and the handle inner housing 21, precise linear displacement control of the transmission rod 3 is achieved, while avoiding wobbling of the transmission rod 3 during movement, thus improving transmission stability and the accuracy of the opening and closing positions.

[0044] This embodiment is not limited to this; the handle 19 may also consist only of a handle housing. In this case, the handle housing is directly connected to the transmission rod 3. By directly pushing, pulling, or rotating the handle housing, the handle housing can directly drive the transmission rod 3 to perform linear reciprocating motion, which in turn drives the moving contact assembly 5 to perform opening and closing motion via the transmission cantilever 2. This structure simplifies the internal components and reduces manufacturing costs.

[0045] In this embodiment, the handle 19 also includes a handle reset component. The handle reset component is disposed between the handle inner shell 21 and the end cap 22, and is used to drive the handle inner shell 21 to move away from the transmission rod 3 along the axial direction of the transmission rod 3. In this embodiment, the handle reset component is specifically a handle spring 26. Utilizing the elastic restoring force of the handle spring 26, the handle inner shell 21 is reset when the handle outer shell 20 is rotated in the opposite direction, thereby realizing the tripping action. The structure is simple and the response is reliable. This embodiment is not limited to this; the handle reset component can also be a torsion spring, disc spring, elastic rubber component, reset cylinder, or tension spring, or other components that can provide elastic restoring force, which can also achieve the automatic reset function of the handle inner shell 21.

[0046] The handle housing 20 is movably connected to the end cap 22, which extends radially along the transmission rod 3 from the mounting housing 15, via a movable connection structure. In this embodiment, the movable connection structure includes at least one handle cantilever seat 25 circumferentially disposed on the end cap 22, a handle cantilever 24 disposed on the handle cantilever seat 25, and a spiral groove 27 disposed on the outer wall of the handle housing 20. The handle cantilever 24 is inserted into the spiral groove 27 to restrict the axial movement of the handle housing 20 along the transmission rod 3 when it rotates. This movable connection structure, through the cooperation of the spiral groove 27 and the handle cantilever 24, converts rotational motion into linear motion. It has a compact structure, high transmission efficiency, and can effectively prevent unnecessary axial movement of the handle housing 20, ensuring operational stability and safety.

[0047] When the handle housing 20 is rotated, the handle cantilever 24 slides along the spiral groove 27, thereby driving the handle inner housing 21 to move along the axis of the transmission rod 3 towards the transmission rod 3 to close the circuit; when the handle housing 20 is rotated in the opposite direction, the elastic restoring force of the handle reset component (such as the handle spring 26) drives the handle inner housing 21 to move away from the transmission rod 3 to open the circuit.

[0048] To enhance connection stability and force balance, two handle cantilever seats 25 are provided, each with a handle cantilever 24, and the two handle cantilever seats 25 are symmetrically arranged relative to the handle housing 20. Two corresponding spiral grooves 27 are provided on the outer wall of the handle housing 20, and the handle cantilever 24 is inserted into each spiral groove 27. The symmetrical arrangement of the handle cantilever 24 and spiral grooves 27 effectively prevents lateral deviation when the handle housing 20 rotates, making the transmission smoother and extending the service life of the movable connection structure.

[0049] In this embodiment, the movable connection structure may also include a guide protrusion 28 disposed on the side of the end cap 22 facing the handle housing 20 and a guide groove 29 disposed on the side of the handle housing 20 facing the end cap 22. The guide protrusion 28 is inserted into the guide groove 29 to limit the axial movement of the handle housing 20 along the transmission rod 3 when it rotates, and when the handle housing 20 rotates, the guide protrusion 28 can rotate relative to the guide groove 29 within the guide groove 29. This achieves the functions of axial limiting and smooth guidance, and the structure is simple, easy to process, and reduces manufacturing difficulty.

[0050] Specifically, both the guide protrusion 28 and the guide groove 29 are annular, providing stable guidance and ease of manufacture. However, this embodiment is not limited to this; the guide protrusion 28 and the guide groove 29 are not necessarily limited to annular shapes. Depending on actual needs, the guide protrusion 28 can be columnar, and the guide groove 29 can be arc-shaped or annular; or the guide protrusion 28 can be arc-shaped, and the guide groove 29 can be arc-shaped or annular. The key is to achieve axial limiting and relative rotational guiding functions when the handle housing 20 rotates.

[0051] In addition, the outer wall of the handle housing 20 is provided with scale markings 30. The groove opening of the spiral groove 27 is provided with scale markings 30 along the spiral direction. By observing the scale markings 30 at different positions of the handle cantilever 24 in the spiral groove 27, the linear motion stroke of the transmission rod 3 can be visually displayed, thereby intuitively judging the current position of the transmission rod 3, and thus judging the opening and closing status of the circuit breaker, which is convenient for operators to perform precise control and status confirmation.

[0052] This embodiment is not limited to manual operation; the control mechanism may also include a drive motor. The drive motor is connected to the handle 19 via a gear reduction mechanism, driving the handle 19 to rotate. This, in turn, through the engagement of the spiral groove 27 and the handle cantilever 24, drives the transmission rod 3 to perform linear reciprocating motion, achieving automated closing and opening operations. A microswitch can also be added to limit the rotation angle of the handle 19, thereby ensuring the safety and accuracy of electric operation.

[0053] It should be noted that the configuration of the drive device can be flexibly combined according to actual needs. When the drive device only includes the magnetic control device 16, the mounting shell 15 is the magnetic control housing of the magnetic control device 16; when the drive device only includes the manual operating device 18, the mounting shell 15 is the housing for mounting the manual operating device 18; when the drive device includes both the magnetic control device 16 and the manual operating device 18, the mounting shell 15 is the housing of the magnetic control device 16, and the manual operating device 18 is independently disposed outside the mounting shell 15.

[0054] It should be noted that this embodiment is not limited to this. The movable connection structure can also be in other forms, such as buckles and slots, bosses and grooves, slide rails and grooves, etc., all of which can realize the movable connection between the handle housing 20 and the end cover 22.

[0055] Furthermore, the observation unit provided in this embodiment is not limited to the observation hole 23; it can also be a transparent window (such as a transparent glass or acrylic plate embedded in the hole), an openable and closable observation plate (such as a cover plate with spring clips), or other structural forms. All these physical structures enable observation of the opening and closing status of the circuit breaker.

[0056] This embodiment provides a circuit breaker, including the control mechanism of the circuit breaker described above. Therefore, the technical advantages and effects achieved by the circuit breaker include the technical advantages and effects achieved by the control mechanism of the circuit breaker, which will not be elaborated here.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A control mechanism for a circuit breaker, characterized in that, include: Transmission cantilever (2), transmission rod (3), mounting housing (15) and handle (19); The mounting housing (15) is connected to the housing (4) of the circuit breaker. The transmission cantilever (2) is connected to the transmission rod (3) and the moving contact assembly (5) of the circuit breaker respectively, and the transmission cantilever (2) can rotate relative to the housing (4); The handle (19) is connected to the side of the mounting shell (15) away from the housing (4). The transmission rod (3) passes through the mounting shell (15) and is inserted into the handle (19). The handle (19) is used to drive the transmission rod (3) to make linear reciprocating motion to transmit the opening and closing power and drive the transmission cantilever (2) to rotate. The transmission cantilever (2) drives the moving contact assembly (5) to make opening and closing motion by rotating.

2. The control mechanism of the circuit breaker according to claim 1, characterized in that, The handle (19) includes a handle housing (20) and a handle inner housing (21) nested within the handle housing (20). One end of the transmission rod (3) is connected to the transmission cantilever (2), and the other end of the transmission rod (3) is connected to the handle inner shell (21). The handle inner shell (21) can slide relative to the handle outer shell (20) along the axial direction of the transmission rod (3). The handle housing (20) is movably connected to the end cap (22) of the mounting housing (15) extending radially along the transmission rod (3) via a movable connection structure, and the handle housing (20) is used to drive the handle inner housing (21) to move in the direction of the transmission rod (3) axially.

3. The control mechanism of the circuit breaker according to claim 2, characterized in that, The handle (19) also includes a handle reset component; The handle reset component is disposed between the handle inner shell (21) and the end cap (22) and is used to drive the handle inner shell (21) to move away from the transmission rod (3) along the axial direction of the transmission rod (3).

4. The control mechanism of the circuit breaker according to claim 2, characterized in that, The movable connection structure includes at least one handle cantilever seat (25) disposed circumferentially on the end cap (22) along the handle housing (20), a handle cantilever (24) disposed on the handle cantilever seat (25), and a spiral groove (27) disposed on the outer side wall of the handle housing (20). The handle cantilever (24) is inserted into the spiral groove (27) to restrict the axial movement of the handle housing (20) along the transmission rod (3) when it rotates.

5. The control mechanism of the circuit breaker according to claim 4, characterized in that, There are two handle cantilever seats (25), each handle cantilever seat (25) is provided with a handle cantilever (24), and the two handle cantilever seats (25) are symmetrically arranged with respect to the handle shell (20); Two spiral grooves (27) are provided on the outer wall of the handle housing (20), and the handle cantilever (24) is inserted into the spiral grooves (27) in a corresponding manner.

6. The control mechanism of the circuit breaker according to claim 2, characterized in that, The movable connection structure includes a guide protrusion (28) disposed on the side of the end cap (22) facing the handle housing (20) and a guide groove (29) disposed on the side of the handle housing (20) facing the end cap (22). The guide protrusion (28) is inserted into the guide groove (29) to restrict the axial movement of the handle housing (20) along the transmission rod (3) when the handle housing (20) rotates, and the guide protrusion (28) can rotate relative to the guide groove (29) in the guide groove (29) when the handle housing (20) rotates.

7. The control mechanism of the circuit breaker according to claim 6, characterized in that, The guide protrusion (28) is annular; The guide groove (29) is annular.

8. The control mechanism of the circuit breaker according to claim 5, characterized in that, The opening of the spiral groove (27) is provided with a scale mark (30) along the spiral direction.

9. The operating mechanism of the circuit breaker according to any one of claims 1-8, characterized in that, It also includes a drive motor, which is connected to the handle (19) to drive the handle (19) to move so that the handle (19) drives the transmission rod (3) to perform linear reciprocating motion.

10. A circuit breaker, characterized in that, Includes the control mechanism of the circuit breaker as described in any one of claims 1-9.

Images