Molded case circuit breaker

Abstract

The utility model discloses a molded case circuit breaker, which comprises a circuit breaker main body and an automatic execution device, and the automatic execution device comprises an actuator shell, a driving motor, a gear box, a driving turntable, a driving block and a guide shaft. The driving motor drives the driving turntable to rotate through the gearbox, the driving roller on the outer side of the driving turntable is matched with the upper / lower driving step of the driving block, the driving block is driven to do linear reciprocating motion along the guide shaft through eccentric motion, and the driving block is connected with a circuit breaker operating handle. According to the utility model, automatic switching-on and switching-off operation is realized, and manual operation is replaced to improve operation convenience and safety in special scenes; the sliding fit between the guide shaft and the semicircular groove of the driving block ensures the stable movement of the driving block, avoids offset, improves the reliability and operation precision of opening and closing, and meets the high requirements of an electric power system.

Description

Technical Field

[0001] This utility model relates to the technical field of molded case circuit breakers, and specifically to a molded case circuit breaker. Background Technology

[0002] Molded case circuit breakers (MCCBs) are important protection and control components in power systems and are widely used in various power supply scenarios such as industry, civil use, and ships. They mainly achieve the connection and disconnection of circuits through closing and opening operations, ensuring the safe and stable operation of the circuit system.

[0003] In the existing technology, most molded case circuit breakers require manual operation of their operating handles to complete the closing and opening. This operation method is not only inefficient, but also has problems of poor safety and inconvenience in some special scenarios (such as high-altitude operations, remote control scenarios, and dangerous power supply environments).

[0004] To address the aforementioned issues, some molded case circuit breakers have begun to be equipped with automatic actuators. However, existing automatic actuators often suffer from complex transmission structures and insufficient operational stability. Specifically, the movement trajectory of the drive components is prone to deviation, leading to unreliable closing and opening actions, which fails to meet the high requirements of power systems for the accuracy and stability of circuit breaker operation. Therefore, there is an urgent need for an automatic operating structure for molded case circuit breakers that offers stable operation and high reliability to overcome the shortcomings of existing technologies. Utility Model Content

[0005] To address the shortcomings of the prior art, this utility model provides a molded case circuit breaker.

[0006] The technical solution adopted by this utility model is: a molded case circuit breaker, including a circuit breaker body and an automatic actuator, wherein the automatic actuator includes an actuator housing, a drive motor, a gearbox, a drive turntable, a drive block and a guide shaft;

[0007] The output shaft of the drive motor is connected to the input end of the gearbox, and the output gear of the gearbox is connected to the drive turntable;

[0008] The outer side of the drive turntable is rotatably connected to a drive roller, and the drive block is provided with an upper drive step and a lower drive step that are adapted to the drive roller.

[0009] The guide shaft is disposed on both sides of the drive block, and the two sides of the drive block are provided with circular grooves that slide with the guide shaft.

[0010] When the drive turntable rotates, the drive turntable drives the drive block to perform linear reciprocating motion along the length of the guide shaft through eccentric motion;

[0011] The drive block is connected to the operating handle on the circuit breaker body.

[0012] Furthermore, the actuator housing includes a cover and a base. Lower columns are provided on both sides of the base, and upper columns are provided on both sides of the gearbox housing. Semi-annular grooves are provided on the top of both the upper and lower columns. The semi-annular grooves of the upper and lower columns close together to form a shaft hole for fixing the guide shaft.

[0013] Furthermore, the drive block has a slot on its side, a status indicator plate is connected to the slot, and the cover has an observation port for observing the status of the status indicator plate.

[0014] Furthermore, the gearbox includes a housing, a drive gear connected to the output end of the drive motor, a first reduction gear meshing with the drive gear, a second reduction gear meshing with the first reduction gear, a third reduction gear meshing with the second reduction gear, and an output gear meshing with the third reduction gear. A manual operation hole is provided on one side of the output gear, and an operation window adapted to the manual operation hole is provided on the cover.

[0015] Furthermore, an operating slide plate is slidably connected to the operating window, and a first locking block is provided on the operating slide plate. A second locking block corresponding to the first locking block is provided on one side of the operating window. Both the first and second locking blocks are provided with lock holes. By sliding the operating slide plate, the manual operating hole can be exposed or hidden.

[0016] Furthermore, it also includes a signal switch, with a trigger end extending from one end of the operating slide plate to be adapted to the signal switch.

[0017] Furthermore, it also includes a smart circuit board, which is connected to signal switches and motors.

[0018] Furthermore, the drive block is provided with a connection hole for connecting to the operating handle.

[0019] Furthermore, the base is provided with a positioning protrusion, and the circuit breaker body is provided with a positioning recess that is adapted to the positioning protrusion.

[0020] The beneficial effects of this utility model are:

[0021] 1. Achieve automatic operation and improve convenience and safety: The circuit breaker operating handle is driven by an automatic actuator to complete the closing and opening of the circuit breaker without manual operation. This effectively solves the problems of low efficiency and poor safety of manual operation in special scenarios (high altitude, long distance, dangerous environment, etc.) and adapts to the usage needs of diverse power supply scenarios.

[0022] 2. Stable and reliable operation, ensuring operational accuracy: The sliding fit between the guide shaft and the semi-circular groove of the drive block precisely limits the movement trajectory of the drive block, ensuring that the drive block makes stable linear reciprocating motion along the guide shaft. This avoids the movement deviation of the drive components, significantly improving the stability and reliability of closing and opening actions, and meeting the high requirements of the power system for the operation accuracy of circuit breakers.

[0023] In addition to the objectives, features and advantages described above, this utility model has other objectives, features and advantages.

[0024] The present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model.

[0026] Figure 2 This is an exploded view of the status indicator panel and the drive block.

[0027] Figure 3 This is a schematic diagram of the internal structure of an automatic actuator.

[0028] Figure 4 This is a schematic diagram of the internal structure of the gearbox.

[0029] Figure 5 This is a structural diagram of the base and the housing.

[0030] Figure 6 This is a schematic diagram of the drive block and guide shaft.

[0031] Figure 7 This is a structural diagram of the drive block and the operating handle.

[0032] Figure 1-7 In the middle section: 1. Circuit breaker body; 2. Automatic actuator; 3. Actuator housing; 4. Drive motor; 5. Gearbox; 6. Drive turntable; 7. Drive block; 8. Guide shaft; 9. Drive roller; 10. Upper drive step; 11. Lower drive step; 12. Semicircular groove; 13. Operating handle; 14. Cover; 15. Base; 16. Lower column; 17. Upper column; 18. Semi-annular groove; 19. Slot; 20. Status indicator panel; 21. 21. Observation port; 22. Housing; 23. Drive gear; 24. First reduction gear; 25. Second reduction gear; 26. Third reduction gear; 27. Output gear; 28. Manual operation hole; 29. ​​Operation window; 30. Operation slide plate; 31. First locking block; 32. Second locking block; 33. Lock hole; 34. Signal switch; 35. Trigger end; 36. Intelligent circuit board; 37. Connection hole; 38. Positioning protrusion; 39. Positioning recess. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0035] This utility model provides a molded case circuit breaker.

[0036] In this embodiment, refer to Figure 1-7 The molded case circuit breaker includes a circuit breaker body 1 and an automatic actuator 2. The automatic actuator 2 includes an actuator housing 3, a drive motor 4, a gearbox 5, a drive turntable 6, a drive block 7, and a guide shaft 8.

[0037] The output shaft of the drive motor is connected to the input end of the gearbox, and the output gear of the gearbox is connected to the drive turntable;

[0038] The outer side of the drive turntable is rotatably connected to a drive roller 9, and the drive block is provided with an upper drive step 10 and a lower drive step 11 adapted to the drive roller 9.

[0039] The guide shaft is disposed on both sides of the drive block, and the two sides of the drive block are provided with circular grooves 12 that slide with the guide shaft.

[0040] When the drive turntable rotates, the drive turntable drives the drive block to perform linear reciprocating motion along the length of the guide shaft through eccentric motion;

[0041] The drive block is connected to the operating handle 13 on the circuit breaker body 1.

[0042] In the above technical solution, the drive motor outputs power, which is transmitted through the gearbox and the speed is adjusted to drive the drive turntable to rotate. The drive turntable cooperates with the upper / lower drive steps of the drive block through the outer drive roller, and converts the rotational power into linear power by means of eccentric motion. The movement trajectory of the drive block is limited by the sliding cooperation between the semi-circular grooves on both sides of the drive block and the guide shaft. Finally, the drive block drives the circuit breaker operating handle to move.

[0043] It enables automatic operation of closing and opening of molded case circuit breakers, replacing manual operation and improving convenience and safety; the limiting function of the guide shaft ensures stable linear reciprocating motion of the drive block, avoids action deviation, and improves the reliability and operational accuracy of opening and closing.

[0044] Specifically, the actuator housing includes a cover 14 and a base 15. Lower columns 16 are provided on both sides of the base 15, and upper columns 17 are provided on both sides of the gearbox housing. Semi-annular grooves 18 are provided on the top of both the upper columns 17 and the lower columns 16. The semi-annular grooves 18 of the upper columns and the lower columns close together to form a shaft hole for fixing the guide shaft.

[0045] In this embodiment, the actuator housing is divided into a cover and a base. The lower columns on both sides of the base are spliced ​​with the semi-annular grooves of the upper columns on both sides of the gearbox to form a complete shaft hole for fixing the guide shaft. This simplifies the installation and fixing structure of the guide shaft and facilitates assembly, disassembly, and maintenance.

[0046] Specifically, the drive block has a slot 19 on its side, a status indicator plate 20 is connected to the slot, and the cover has an observation port 21 for observing the status of the status indicator plate 20.

[0047] In this embodiment, a status indicator plate is connected to a slot on the side of the drive block, and an observation port is opened on the cover. The status indicator plate moves synchronously with the drive block. The status of the indicator plate can be viewed intuitively through the observation port, thereby distinguishing whether the circuit breaker is closed or open.

[0048] Specifically, the gearbox includes a housing 22, a drive gear 23 connected to the output end of the drive motor, a first reduction gear 24 meshing with the drive gear, a second reduction gear 25 meshing with the first reduction gear 24, a third reduction gear 26 meshing with the second reduction gear 25, and an output gear 27 meshing with the third reduction gear 26. A manual operation hole 28 is provided on one side of the output gear, and an operation window 29 adapted to the manual operation hole is provided on the cover.

[0049] In this embodiment, the gearbox adopts a multi-stage meshing transmission structure consisting of a drive gear, first to third reduction gears, and an output gear to achieve power reduction and torque increase; the output gear is provided with a manual operation hole, and the cover is provided with a corresponding operation window, through which tools can be inserted to operate the manual operation hole, such as a hexagonal wrench hole.

[0050] Specifically, an operation slide plate 30 is slidably connected to the operation window, and a first locking block 31 is provided on the operation slide plate 30. A second locking block 32 corresponding to the first locking block is provided on one side of the operation window. Both the first and second locking blocks are provided with lock holes 33. By sliding the operation slide plate, the manual operation hole can be exposed or hidden.

[0051] In this embodiment, the operation window is slidably connected to the operation slide plate. The slide plate and the window are respectively provided with a first and second locking block and a lock hole. By sliding the slide plate, the exposed / hidden state of the manual operation hole can be switched. The lock hole can cooperate with the lock to lock the position of the slide plate and seal the manual operation hole.

[0052] Specifically, it also includes a signal switch 34, and one end of the operating slide plate extends a trigger end 35 adapted to the signal switch.

[0053] In this embodiment, a signal switch is set up, and a trigger end is extended from one end of the operating slide. When the slide slides, the trigger end is displaced synchronously, triggering or disengaging the signal switch, thereby realizing the acquisition of signals of the slide's state.

[0054] Specifically, it also includes a smart circuit board 36, which is connected to a signal switch and a motor.

[0055] In this embodiment, the intelligent circuit board is connected to the signal switch and the drive motor respectively, receiving the status signals from the signal switch and simultaneously outputting control signals to drive the motor to start, stop, and rotate in both directions. This enables automated and intelligent control of the device, allowing for adaptive adjustment of motor actions based on signal feedback, thus improving operational accuracy. It also facilitates integration with remote control systems, expanding remote control functions and adapting to the needs of intelligent power systems.

[0056] Specifically, the drive block is provided with a connection hole 37 for connecting to the operating handle.

[0057] In this embodiment, the drive block has a connection hole, and the operating handle can be inserted into the connection hole to connect with the drive block, making disassembly and assembly convenient.

[0058] Specifically, the base is provided with a positioning protrusion 38, and the circuit breaker body is provided with a positioning recess 39 that is adapted to the positioning protrusion 38.

[0059] In this embodiment, the base is provided with a positioning protrusion, and the circuit breaker body is provided with a corresponding positioning recess. During assembly, the positioning protrusion is embedded into the positioning recess to achieve precise positioning of the automatic actuator and the circuit breaker body.

[0060] Attention all technical personnel: Although this utility model has been described according to the specific embodiments above, the concept of this utility model is not limited to this utility model. Any modification that utilizes the concept of this utility model will be included within the scope of protection of this patent right.

Claims

1. A molded case circuit breaker comprising a circuit breaker body and an automatic execution device, characterized by: The automatic execution device comprises an executor shell, a driving motor, a gear box, a driving turntable, a driving block and a guide shaft; The output shaft of the driving motor is connected with the input end of the gear box, and the output gear of the gear box is connected with the driving turntable; The outer side of the driving turntable is rotationally connected with a driving roller, and the driving block is provided with an upper driving step and a lower driving step matched with the driving roller; The guide shaft is arranged on both sides of the driving block, and both sides of the driving block are provided with circular grooves in sliding fit with the guide shaft; When the driving turntable rotates, the driving turntable drives the driving block to make linear reciprocating motion along the length direction of the guide shaft through eccentric motion; The driving block is connected with the operating handle on the circuit breaker body.

2. The molded case circuit breaker of claim 1, wherein: The executor shell comprises a cover and a base, both sides of the base are provided with lower columns, both sides of the box body of the gear box are provided with upper columns, the top of the upper columns and the lower columns are provided with half-ring grooves, and the half-ring grooves of the upper columns and the lower columns are folded to form shaft holes for fixing the guide shaft.

3. The molded case circuit breaker of claim 2, wherein: The driving block is provided with an insertion groove on the side surface, a state indicating plate is connected on the insertion groove, and an observation opening for observing the state of the state indicating plate is arranged on the cover.

4. The molded case circuit breaker of claim 2, wherein: The gear box comprises a box body, a driving gear connected with the output end of the driving motor, a first reduction gear in mesh transmission with the driving gear, a second reduction gear in mesh transmission with the first reduction gear, a third reduction gear in mesh transmission with the second reduction gear, and an output gear in mesh transmission with the third reduction gear, one side of the output gear is provided with a manual operation hole, and the cover is provided with an operation window matched with the manual operation hole.

5. The molded case circuit breaker of claim 4, wherein: An operation slide plate is slidably connected on the operation window, the operation slide plate is provided with a first lock block, one side of the operation window is provided with a second lock block corresponding to the first lock block, the first lock block and the second lock block are both provided with lock holes, and the manual operation hole can be in exposed or hidden state by sliding the operation slide plate.

6. The molded case circuit breaker of claim 5, wherein: A signal switch is further included, and one end of the operation slide plate extends a trigger end matched with the signal switch.

7. The molded case circuit breaker of claim 6, wherein: An intelligent circuit board is further included, and the intelligent circuit board is connected with the signal switch and the motor.

8. The molded case circuit breaker of claim 1, wherein: The driving block is provided with a connecting hole connected with the operating handle.

9. The molded case circuit breaker of claim 2, wherein: The base is provided with a positioning convex part, and the circuit breaker body is provided with a positioning concave part matched with the positioning convex part.

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