A double-link reclosing mechanism and circuit breaker

Abstract

The application relates to the technical field of circuit breakers, in particular to a double-link reclosing mechanism and a circuit breaker, which comprises a driving assembly, a rotating piece, a first connecting rod, a second connecting rod, a fixed plate and a sliding block, the driving assembly is used for driving the rotating piece to rotate, the first connecting rod comprises a connecting end and a transmission end, the connecting end is eccentrically connected to the rotating piece, the transmission end is rotationally connected to the second connecting rod, the fixed plate and the sliding block are located on one side of the rotating piece, the sliding block can slide in the direction close to or far away from the rotating piece, the sliding block is used for driving the handle of the circuit breaker to rotate, an inclined groove is arranged on the fixed plate, the inclined groove extends in the direction far away from the sliding block, the second connecting rod comprises a sliding end and a rotating end, the sliding end slides along the inclined groove, the rotating end is rotationally connected to the sliding block, and the transmission end is located between the sliding end and the rotating end.

Description

Technical Field

[0001] This application relates to the field of circuit breakers, and in particular to a double-link reclosing mechanism and a circuit breaker. Background Technology

[0002] A circuit breaker is a basic and important switching device. It can not only connect and disconnect current like an ordinary switch, but more importantly, it can automatically trip and disconnect the circuit when abnormal conditions such as overload or short circuit occur in the circuit, thereby protecting the lines, power equipment and personal safety.

[0003] In related technologies, circuit breakers include reclosing mechanisms, which consist of a drive source, a crank, and a connecting rod. The drive source drives the crank to rotate, and one end of the crank is eccentrically connected to the connecting rod. The other end of the connecting rod is rotatably connected to a handle, thereby driving the handle to rotate and achieve closing. However, in order to achieve stable closing, the aforementioned reclosing mechanisms require relatively large cranks, resulting in a large space occupied by the reclosing mechanism and a large overall size of the circuit breaker, which is not conducive to the miniaturization design of circuit breakers. Summary of the Invention

[0004] To reduce the space occupied by the reclosing mechanism, this application provides a double-link reclosing mechanism and a circuit breaker.

[0005] This application provides a double-link reclosing mechanism and circuit breaker, which adopts the following technical solution:

[0006] A double-link reclosing mechanism includes a drive assembly, a rotating component, a first link, a second link, a fixed plate, and a slider. The drive assembly drives the rotating component to rotate. The first link includes a connecting end and a transmission end. The connecting end is eccentrically rotatably connected to the rotating component, and the transmission end is rotatably connected to the second link. The fixed plate and the slider are both located on one side of the rotating component. The slider can slide in a direction close to or away from the rotating component. The slider is used to drive the circuit breaker handle to rotate. The fixed plate has an inclined groove that extends in a direction that is further away from the rotating component and further away from the slider. The second link includes a sliding end and a rotating end. The sliding end slides along the inclined groove, and the rotating end is rotatably connected to the slider. The transmission end is located between the sliding end and the rotating end.

[0007] By adopting the above technical solution, a drive assembly drives the rotating component, and the eccentric connection between the first link and the rotating component converts the rotation into the oscillation of the first link. Then, through the sliding constraint of the second link within the inclined groove of the fixed plate, the oscillation is ultimately converted into the linear motion of the slider in a specific direction. This combination of a double link and the inclined groove structure achieves a larger slider stroke with a smaller rotating component radius, thus effectively driving the circuit breaker to close. By setting the inclined groove, compared to opening a strip groove on the slider or the second link, the length of the second link can be reduced while achieving the same slider sliding stroke, thus saving effort. Compared to traditional mechanisms using large-sized cranks, this solution significantly reduces the movement space required by the drive components, making the layout of the entire reclosing mechanism more compact, which is beneficial for reducing the overall size of the circuit breaker and meeting the requirements of miniaturization design.

[0008] Optionally, the fixing plate is also provided with a straight groove communicating with the inclined groove. The straight groove extends along the sliding direction of the slider and is located on the side of the inclined groove away from the rotating part.

[0009] By adopting the above technical solution, a straight groove communicating with the inclined groove is opened on the fixed plate, providing a more complete motion path for the sliding end of the second connecting rod. The straight groove cooperates with the inclined groove. The inclined groove already meets the requirements for the change of track distance. The setting of the straight groove is not used to increase the stroke of the slider, but to save effort: when the four-bar linkage inside the handle reaches the dead point of high effort, the sliding end of the second connecting rod is located in the straight groove, reducing the torque and achieving the effect of saving effort.

[0010] Optionally, the included angle between the inclined groove and the straight groove is 120°.

[0011] By adopting the above technical solution, the included angle between the inclined slot and the straight slot is specifically set to 120°, which is an optimized angle design. This angle ensures that the first and second connecting rods are subjected to the most reasonable force during transmission, resulting in a smooth and seamless motion transition and avoiding motion interference or jamming caused by improper angle design. At the same time, this angle can save effort while ensuring a sufficient stroke amplification ratio, and it also balances the overall structure in terms of length and width, further optimizing the space utilization efficiency inside the reclosing mechanism.

[0012] Optionally, it may also include a guide rod extending along the sliding direction of the slider, wherein the slider has a guide hole through which the guide rod passes.

[0013] By adopting the above technical solution, a guide rod extending along the sliding direction of the slider is set, and the slider slides through the guide rod, providing precise guidance and constraint for the linear reciprocating motion of the slider. This avoids the slider from swaying or jamming during long-term use or due to uneven force, ensuring the accuracy of the slider's motion trajectory. This, in turn, ensures that the handle linked to the slider can accurately reach the closing or opening position, improving the overall motion accuracy and service life of the mechanism.

[0014] Optionally, the slider is provided with a slot for inserting a circuit breaker handle.

[0015] By adopting the above technical solution, a slot for inserting the circuit breaker handle is provided on the slider, achieving precise linkage between the drive assembly and the internal operating handle of the circuit breaker. This slot, as a standard connection interface, can form a stable plug-in fit with the end of the circuit breaker handle. When the slider slides linearly under the action of the drive assembly, the slot drives the circuit breaker handle to move synchronously, thereby precisely controlling the closing and opening states of the circuit breaker.

[0016] Optionally, the drive assembly includes a drive source, an operating lever, and a pinion. The operating lever is used for manual operation and to drive the pinion to rotate. The rotating component is a large gear. The drive source is used to drive the large gear to rotate. The pinion has fewer teeth than the large gear, and the pinion and the large gear are meshed together.

[0017] By adopting the above technical solution, the drive assembly integrates both electric and manual drive methods. During normal operation, the drive source (such as a motor) drives the rotating components via a large gear, providing sufficient driving torque to achieve automatic reclosing. Simultaneously, the operating lever design allows for manual operation in situations such as power outages or testing, ensuring the mechanism can be controlled under any circumstances and improving the product's practicality and reliability. Because the pinion has fewer teeth than the large gear, a reduction mechanism is formed, making manual operation more effortless.

[0018] Optionally, it also includes a mounting plate, the operating lever is anti-rotatingly connected to the pinion, a pressure plate is fixedly connected to the operating lever, the pinion is located between the pressure plate and the mounting plate, and an elastic element is provided between the pressure plate and the mounting plate to press the pinion onto the mounting plate.

[0019] By adopting the above technical solution, a pressure plate is installed on the operating lever, and in conjunction with a mounting plate and elastic elements, the elastic force of the elastic elements presses the pinion firmly against the mounting plate. This axial elastic clamping structure can automatically eliminate the axial clearance that may occur when the pinion and gear mesh, ensuring that the gears are always tightly meshed, thereby reducing transmission noise and vibration, and improving the smoothness and reliability of the transmission. At the same time, this structure can also compensate for changes in axial clearance caused by manufacturing tolerances of parts or wear over long-term use, and has an adaptive adjustment function, extending the service life of the mechanism.

[0020] A circuit breaker includes a housing and a double-link reclosing mechanism, wherein the double-link reclosing mechanism is disposed within the housing.

[0021] By adopting the above technical solution, the double-link reclosing mechanism is integrated into the circuit breaker housing, forming a complete circuit breaker product. This organically combines the compact double-link transmission mechanism with the circuit breaker housing, allowing the reclosing mechanism to function as a built-in module. Because the double-link reclosing mechanism itself occupies little space and has a compact layout, its inclusion in the housing effectively controls the overall dimensions of the circuit breaker, avoiding excessive product size due to the addition of automatic reclosing functionality. Simultaneously, this solution effectively protects moving parts such as the drive assembly, first link, second link, fixed plate, and slider from the housing, reducing interference from external dust and foreign objects on the precision transmission mechanism and improving the product's environmental adaptability and operational reliability. Furthermore, the housing provides a precise installation reference for the relative positions of each component, ensuring the accuracy of key transmission relationships such as the eccentric connection between the first link and the rotating part, and the sliding fit between the second link and the inclined slot, thereby guaranteeing the stability and consistency of the reclosing action.

[0022] Optionally, the housing includes multiple terminals for connecting external circuits, the slider and the fixing plate are arranged along the arrangement direction of each terminal, and the slider slides in a direction perpendicular to the arrangement direction of each terminal.

[0023] By adopting the above technical solution, the slider and the fixed plate are arranged along the wiring terminal arrangement direction, while the slider sliding direction is perpendicular to this arrangement direction. This layout fully considers the shape of the internal space of the circuit breaker housing and the position of the wiring terminals, so that the movement direction of the slender slider is perpendicular to the wiring terminal arrangement direction. This maximizes the use of the width and length of the housing, realizes the rational planning and efficient use of the internal space, and helps the overall circuit breaker to develop in a shorter and narrower direction. Attached Figure Description

[0024] Figure 1 This is a structural schematic diagram of the double-link reclosing mechanism of this application.

[0025] Figure 2This is a schematic diagram of the operating lever in this application.

[0026] Figure 3 This is a schematic diagram of the circuit breaker in this application.

[0027] Figure 4 This is a schematic diagram of the internal structure of the circuit breaker in this application.

[0028] Explanation of reference numerals in the attached drawings: 1. Drive assembly; 11. Drive source; 12. Operating lever; 13. Pinion; 2. Rotating component; 3. First connecting rod; 31. Connecting end; 32. Transmission end; 4. Second connecting rod; 41. Sliding end; 42. Rotating end; 5. Fixed plate; 51. Inclined groove; 52. Straight groove; 6. Slider; 61. Guide hole; 62. Slot; 7. Guide rod; 8. Housing; 81. Wiring terminal; 9. Pressure plate; 100. Mounting plate; 110. Elastic component. Detailed Implementation

[0029] The following combination Figures 1-4 This application will be described in further detail.

[0030] This application discloses a double-link reclosing mechanism. (Refer to...) Figure 1 The double-link reclosing mechanism includes a drive assembly 1, a rotating component 2, a first link 3, a second link 4, a fixed plate 5, and a slider 6. The drive assembly 1 is connected to the rotating component 2 to drive its rotation. The first link 3 includes a connecting end 31 and a transmission end 32. The connecting end 31 is eccentrically rotatably connected to the rotating component 2, and the transmission end 32 is rotatably connected to the second link 4. The fixed plate 5 and the slider 6 are both located on one side of the rotating component 2. The slider 6 can slide towards or away from the rotating component 2 and is used to rotate the circuit breaker handle. The fixed plate 5 has a groove 51 that extends further away from the rotating component 2 and further away from the slider 6. The second link 4 includes a sliding end 41 and a rotating end 42. The sliding end 41 slides along the groove 51, and the rotating end 42 is rotatably connected to the slider 6. The transmission end 32 is located between the sliding end 41 and the rotating end 42. This structural combination converts the rotation of the rotating part 2 into the linear motion of the slider 6, achieving a larger stroke of the slider 6 with a smaller rotation radius of the rotating part 2, thereby effectively driving the circuit breaker to close. At the same time, it reduces the movement space required by the drive components, making the layout of the entire reclosing mechanism more compact.

[0031] Reference Figure 1 The drive assembly 1 includes a drive source 11 and a rotating component 2, which is a large gear. The drive source 11 can be a motor, and the output shaft of the motor is connected to the rotating component 2 via a key and keyway or ratchet structure to prevent rotation, thereby providing power to the rotating component 2 and driving it to rotate.

[0032] Reference Figure 1The drive assembly 1 also includes an operating lever 12 and a pinion 13. The operating lever 12 is for manual operation. The operating lever 12 and the pinion 13 are connected to each other via a key and keyway structure to prevent rotation. When the operating lever 12 is manually operated, it drives the pinion 13 to rotate. The pinion 13 has fewer teeth than the large gear. The pinion 13 meshes with the large gear to form a reduction mechanism. When the pinion 13 rotates, it drives the large gear to rotate, making manual operation easier. The operating lever 12 can be a rod-shaped structure with an internal hexagonal groove, making it convenient for the operator to use tools to rotate the operating lever 12. The drive source 11 can also use a hydraulic motor or other power source to replace the electric motor, as long as it can achieve the function of driving the rotating part 2 to rotate. The large gear can also be replaced by a sprocket or other transmission components, as long as it can cooperate with the pinion 13 to achieve the transmission function.

[0033] Reference Figure 3 The first connecting rod 3 can be made of metal, such as steel or aluminum alloy, to ensure its strength and rigidity. Alternatively, it can be made of engineering plastics to reduce weight. The connecting end 31 of the first connecting rod 3 is eccentrically rotatably connected to the rotating part 2 via a pin or other connecting component. When the rotating part 2 rotates, the connecting end 31 moves in a circular motion with the rotating part 2, thereby causing the first connecting rod 3 to swing. The transmission end 32 is rotatably connected to the second connecting rod 4 via a pin or other connecting component, transmitting the swing of the first connecting rod 3 to the second connecting rod 4.

[0034] Reference Figure 1 The second connecting rod 4 can also be made of metal or engineering plastic. A pivot or other rotating structure, such as a pin, is fixedly mounted on the sliding end 41 of the second connecting rod 4. This rotating structure can slide and rotate within the inclined groove 51. A roller can also be provided on the sliding end 41 of the second connecting rod 4. The roller rolls along the inclined groove 51 on the fixed plate 5, reducing friction during sliding. The rotating end 42 is rotatably connected to the slider 6 via a pin or other connecting component.

[0035] Reference Figure 1 The fixing plate 5 can be made of materials such as metal or plastic plates, and manufactured through processes such as casting and machining. The fixing plate 5 can also be replaced by other support structures, as long as they can provide the inclined groove 51 and serve a supporting function. The shape of the inclined groove 51 can be straight or curved, but it generally extends in a direction that is further away from the rotating part 2 and further away from the slider 6.

[0036] Reference Figure 1 The fixed plate 5 also has a straight groove 52 that communicates with the inclined groove 51. The straight groove 52 extends along the sliding direction of the slider 6 and is located on the side of the inclined groove 51 away from the rotating part 2. The straight groove 52 provides a more complete motion path for the sliding end 41 of the second link 4. When the four-bar linkage inside the handle reaches the dead point of high effort, the sliding end 41 of the second link 4 is located in the straight groove 52, reducing the torque and achieving the effect of saving effort.

[0037] Reference Figure 1 The included angle between the straight groove 52 and the inclined groove 51 is 120°. Setting the included angle between the inclined groove 51 and the straight groove 52 to 120° is an optimized angle design that ensures the most reasonable force distribution on the first connecting rod 3 and the second connecting rod 4 during transmission, resulting in smooth and seamless motion transitions and avoiding motion interference or jamming caused by improper angle design. Simultaneously, this angle, while ensuring a sufficient stroke amplification ratio, also saves effort and balances the overall structure's dimensions in both length and width directions, further optimizing the internal space utilization efficiency of the reclosing mechanism.

[0038] Reference Figure 1 The double-link reclosing mechanism also includes guide rods 7, which extend along the sliding direction of the slider 6. Two guide rods 7 are provided and arranged in parallel. A guide hole 61 is provided on the slider 6 for the guide rods 7 to pass through. The guide rods 7 provide precise guidance and constraint for the linear reciprocating motion of the slider 6. The guide rods 7 can be made of metal with a smooth surface to reduce friction between them and the guide hole 61 of the slider 6.

[0039] Reference Figure 1 The slider 6 also has a slot 62 for inserting the circuit breaker handle. The shape of the slot 62 is adapted to the end shape of the circuit breaker handle, so as to realize the precise linkage between the drive assembly 1 and the operating handle inside the circuit breaker. The slider 6 can be made of materials such as metal or plastic, and can be manufactured by processes such as machining or injection molding.

[0040] Reference Figure 1 and Figure 2 The double-link reclosing mechanism also includes a mounting plate 100. A pressure plate 9 is fixedly connected to the operating lever 12 via an interference fit or similar method. A pinion 13 is located between the pressure plate 9 and the mounting plate 100. An elastic element 110 connects the pressure plate 9 and the mounting plate 100, causing the pressure plate 9 to press the pinion 13 against the mounting plate 100. In this embodiment, the elastic element 110 is a spring. Two washers are slidably fitted on the operating lever 12, located on the side of the mounting plate 100 away from the pinion 13. A spring is also fitted on the operating lever 12. A pin is horizontally fixed to the operating lever 12. The spring force presses one washer against the mounting plate 100 and the other washer against the pin, continuously applying a downward force to the operating lever 12, causing the pressure plate 9 to press the pinion 13 against the mounting plate 100. This axial elastic clamping structure can automatically eliminate the axial clearance that may occur when the pinion 13 meshes with the gear, ensuring that the gears are always tightly meshed. This reduces transmission noise and vibration, and improves the smoothness and reliability of the transmission. At the same time, this structure can also compensate for changes in axial clearance caused by manufacturing tolerances of parts or wear over long-term use, and has an adaptive adjustment function, extending the service life of the mechanism.

[0041] The implementation principle of a double-link reclosing mechanism in this application embodiment is as follows: When operated manually, the operating lever 12 rotates, driving the pinion 13 to rotate, which in turn drives the rotating component 2 to rotate; when driven electrically, the drive source 11 drives the rotating component 2 to rotate, and the rotating component 2 drives the first link 3, which is eccentrically connected to it, to swing. The swing of the first link 3 is transmitted to the second link 4 through the transmission end 32. The sliding end 41 of the second link 4 slides in the inclined groove 51 of the fixed plate 5. Due to the constraint of the guide rod 7, the second link 4 converts the swing into the linear motion of the slider 6 in a specific direction. The slider 6 drives the circuit breaker handle to rotate through the slot 62 to realize the closing operation.

[0042] This application also discloses a circuit breaker. (See attached embodiments.) Figure 3 and Figure 4 The circuit breaker includes a housing 8 and the aforementioned double-link reclosing mechanism. The housing 8 can be made of plastic or metal and manufactured through processes such as injection molding or machining, possessing certain strength and protective performance. The housing 8 includes multiple terminals 81 for connecting external lines. The terminals 81 are used to connect external wires and cables, realizing the connection between the circuit breaker and the external circuit.

[0043] Reference Figure 4 The drive source 11, the fixing plate 5, the guide rod 7 and the mounting plate 100 are all fixedly installed in the housing 8 by means of bolt connection, etc., and the operating rod 12 is rotatably installed in the housing 8.

[0044] Reference Figure 4 The slider 6 and the fixed plate 5 are arranged along the direction of the arrangement of each terminal 81, and the slider 6 slides in a direction perpendicular to the direction of the arrangement of each terminal 81. This arrangement of the slider 6 and the fixed plate 5 fully considers the shape of the internal space of the circuit breaker housing 8 and the position of the terminals 81, so that the movement direction of the slender slider 6 is perpendicular to the direction of the arrangement of the terminals 81. This maximizes the use of the width and length of the housing 8, realizes the rational planning and efficient use of the internal space, and helps the circuit breaker to develop in a shorter and narrower direction, meeting the needs of circuit breaker miniaturization design. The pinion 13 and the rotating part 2 are arranged along the direction of the arrangement of each terminal 81.

[0045] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A double-link reclosing mechanism, characterized in that: The circuit breaker assembly includes a drive assembly (1), a rotating component (2), a first connecting rod (3), a second connecting rod (4), a fixed plate (5), and a slider (6). The drive assembly (1) drives the rotating component (2) to rotate. The first connecting rod (3) includes a connecting end (31) and a transmission end (32). The connecting end (31) is eccentrically connected to the rotating component (2), and the transmission end (32) is rotatably connected to the second connecting rod (4). The fixed plate (5) and the slider (6) are both located on one side of the rotating component (2). The slider (6) can slide in a direction closer to or farther from the rotating component (2). The slider (6) is used to drive the circuit breaker handle to rotate. The fixed plate (5) has a groove (51) that extends in a direction that is farther away from the rotating component (2) and farther away from the slider (6). The second connecting rod (4) includes a sliding end (41) and a rotating end (42). The sliding end (41) slides along the groove (51), and the rotating end (42) is rotatably connected to the second connecting rod (6). The slider (6) is rotatably connected, and the transmission end (32) is located between the sliding end (41) and the rotating end (42). The driving assembly (1) includes a driving source (11), an operating lever (12), and a pinion (13). The operating lever (12) is used for manual operation and is used to drive the pinion (13) to rotate. The rotating component (2) is a large gear, and the driving source (11) is used to drive the large gear to rotate. The number of teeth of the pinion (13) is less than that of the large gear. The gear has a number of teeth, the small gear (13) meshes with the large gear, and also includes a mounting plate (100). The operating lever (12) is connected to the small gear (13) to prevent rotation. A pressure plate (9) is fixedly connected to the operating lever (12). The small gear (13) is located between the pressure plate (9) and the mounting plate (100). An elastic element (110) is provided between the pressure plate (9) and the mounting plate (100) to press the small gear (13) onto the mounting plate (100).

2. The double-link reclosing mechanism according to claim 1, characterized in that: The fixed plate (5) is also provided with a straight groove (52) that communicates with the inclined groove (51). The straight groove (52) extends along the sliding direction of the slider (6) and is located on the side of the inclined groove (51) away from the rotating part (2).

3. The double-link reclosing mechanism according to claim 2, characterized in that: The included angle between the inclined groove (51) and the straight groove (52) is 120°.

4. The double-link reclosing mechanism according to claim 1, characterized in that: It also includes a guide rod (7) extending along the sliding direction of the slider (6), and the slider (6) has a guide hole (61) through which the guide rod (7) passes.

5. The double-link reclosing mechanism according to claim 1, characterized in that: The slider (6) has a slot (62) for inserting the circuit breaker handle.

6. A circuit breaker, characterized in that: It includes a housing (8) and a double-link reclosing mechanism as described in any one of claims 1-5, wherein the double-link reclosing mechanism is disposed within the housing (8).

7. A circuit breaker according to claim 6, characterized in that: The housing (8) includes a plurality of terminals (81) for connecting external lines. The slider (6) and the fixing plate (5) are arranged along the arrangement direction of each terminal (81). The slider (6) slides in a direction perpendicular to the arrangement direction of each terminal (81).

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