Linkage self-locking mechanism of automatic actuator of circuit breaker

Abstract

The utility model discloses a linkage self-locking mechanism of an automatic actuator of a circuit breaker, which is used for the automatic actuator of the circuit breaker and comprises a manual operation hole, a safety plugboard and a gear sliding plate. The safety insertion plate penetrates through the actuator shell and the gearbox guide hole and is connected with the stop block; the gear sliding plate is connected to the actuator shell in a sliding manner to control the manual operation hole to be opened and closed; the safety insertion plate is provided with a blocking piece, the gear sliding plate is provided with a guide boss, the gearbox is provided with an adaptive guide sliding groove, and two-way interlocking is formed. According to the utility model, bidirectional interlocking of the safety plugboard and the gear sliding plate is realized, and the risk of misoperation is thoroughly avoided; the structure is simple and compact, assembly and operation stability is high, and complex transmission parts are not needed; the device is high in adaptability, can be directly integrated into an existing automatic actuator, is convenient to upgrade and reconstruct, and improves the practical value and the popularization prospect.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to a linkage self-locking mechanism for an automatic actuator of a circuit breaker. Background Technology

[0002] With the development of intelligent power systems, circuit breaker actuators are generally equipped with manual operation components to form a dual-mode redundancy guarantee of "automatic and manual" operation, ensuring normal opening and closing under extreme conditions and improving operational reliability.

[0003] The manual operation components and safety protection structures of existing automatic actuators are designed independently, lacking an effective linkage and self-locking mechanism, which poses significant safety hazards: during maintenance, after the safety plug is pulled out to lock the circuit breaker, the manual operation hole can still be opened and the circuit breaker can be closed accidentally, resulting in the failure of protection; during manual operation, accidentally pulling out the safety plug can easily cause mechanical interference of components, hindering operation and causing damage to components, affecting the stability and lifespan of the equipment.

[0004] Some existing locking structures are unidirectional limit designs, which cannot achieve bidirectional interlocking and have insufficient protection reliability; moreover, they often require the addition of complex transmission components, resulting in bulky structures, difficult assembly, and susceptibility to failure due to environmental factors, making it difficult to meet the high reliability and high safety requirements of power equipment.

[0005] Therefore, designing a simple and reliable two-way interlocking mechanism to avoid the risk of misoperation and improve the stability of operation and assembly has become an urgent technical problem to be solved in the field of circuit breaker automatic actuators. Utility Model Content

[0006] To address the shortcomings in the prior art, this utility model provides a linkage self-locking mechanism for an automatic actuator of a circuit breaker.

[0007] The technical solution adopted in this utility model is: a linkage self-locking mechanism for an automatic actuator of a circuit breaker, used in an automatic actuator of a circuit breaker. The automatic actuator includes an actuator housing, a blocking block, a gearbox, a drive turntable, a drive motor, and a drive block. The drive block is connected to the operating handle of the circuit breaker.

[0008] The linkage self-locking mechanism includes a manual operation hole at the gearbox input end, a safety insert plate, and a gear shift slide plate;

[0009] One end of the safety insert plate passes through the guide hole of the actuator housing and gearbox and is connected to the blocking block, while the other end is partially exposed in the actuator housing as the operating end;

[0010] The gear shift slide is slidably connected to the actuator housing and is used to open or close the manual operation port;

[0011] A blocking plate is provided on one side of the safety insert plate, a guide boss is provided on the gear shift slide plate, and a guide groove is provided on the outer wall of the gearbox to slide in cooperation with the guide boss.

[0012] When the safety insert is pulled out from the guide hole upwards, the blocking plate can abut against the guide boss to prevent the gear slide from sliding open to the manual operation hole side; when the gear slide slides open to the manual operation hole side, the guide boss can abut against the blocking plate to prevent the safety insert from being pulled out from the guide hole upwards.

[0013] Furthermore, it also includes a smart circuit board, and a first signal switch is provided on one side of the gear shift slide, the first signal switch interacting with the switch action bar on the gear shift slide;

[0014] A second signal switch is provided at the bottom of the gearbox, and a protrusion that interacts with the second signal switch is provided on the outer edge of the drive turntable.

[0015] Both the first and second signal switches are connected to the intelligent circuit board to detect the opening and closing status of the manual operation hole and the rotation status of the drive turntable, thereby realizing electrical signal linkage control.

[0016] Furthermore, an operation opening and closing assembly is slidably connected to the cover of the actuator housing. The operation opening and closing assembly includes a sliding cover that slides with the actuator housing and the aforementioned gear plate that is connected to the sliding cover.

[0017] The sliding cover is provided with a connecting clip that matches the connecting slot of the gear shift slide, so as to realize the synchronous sliding of the sliding cover and the gear shift slide.

[0018] The gear shift slide is provided with positioning protrusions on both sides, and the bottom wall of the actuator housing is provided with an elastic positioning plate. The elastic positioning plate is provided with an opening concave surface and a closing concave surface that are adapted to the positioning protrusions, which are used to stably position the gear shift slide in the open or closed state.

[0019] Furthermore, the operating end of the safety plug is provided with a handle hole, which makes it convenient for the operator to insert and remove the safety plug;

[0020] The blocking block is adapted to one side of the driving block. When the safety plug is pulled out, the blocking block can abut against the driving block to mechanically prevent the driving block from sliding to the closing side and prevent accidental closing.

[0021] Furthermore, the manual operation hole is a hexagonal hole, the operating tool is a hexagonal wrench, and the hexagonal wrench is covered with an operating plastic shell to improve grip comfort;

[0022] The actuator housing is provided with a receiving cavity for accommodating a hexagonal wrench and a insertion hole for inserting the hexagonal wrench, realizing integrated storage and quick access to the operating tools.

[0023] The beneficial effects of this utility model are:

[0024] 1. Achieve two-way interlocking to avoid safety risks from misoperation. By cooperating with the blocking plate on the safety plug and the guide boss on the gear shift slide, a two-way interlocking logic is formed: "If the safety plug is pulled out, the gear shift slide cannot open the manual operation hole; if the gear shift slide is open, the safety plug cannot be pulled out." This not only avoids the problem of accidental manual closing after the safety plug is locked during maintenance, but also prevents mechanical interference caused by accidentally pulling out the safety plug during manual operation, fundamentally ensuring operational safety and equipment stability.

[0025] 2. The structure is simple and compact, with high assembly and operational stability. This mechanism achieves linkage and self-locking through simple structural improvements such as adding a blocking plate to the safety insert, a guide boss to the gear slide, and a guide groove to the gearbox. No additional complex transmission components are required, effectively simplifying the structural design and reducing assembly difficulty and manufacturing costs. Furthermore, the purely mechanical linkage requires no electrical control, is unaffected by environmental dust, vibration, or other factors, ensures reliable locking, is less prone to failure, and improves the mechanism's service life and adaptability.

[0026] 3. Strong adaptability and good compatibility. The components of this linkage self-locking mechanism can be directly integrated into existing circuit breaker automatic actuators that include actuator housings, blocking blocks, gearboxes, and manual operation components, without requiring significant modifications to the main structure of the automatic actuator. It has a wide range of applications, facilitates the upgrading and transformation of existing equipment, and further enhances the practical value and promotion prospects of the technical solution.

[0027] In addition to the objectives, features and advantages described above, this utility model has other objectives, features and advantages.

[0028] The present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of this utility model.

[0030] Figure 2 This is an exploded view of the present invention.

[0031] Figure 3 A schematic diagram of the structure of the cover for the actuator housing.

[0032] Figure 4 This is a schematic diagram of the gearbox structure.

[0033] Figure 5This is a schematic diagram of the gearbox from another perspective.

[0034] Figure 6 This is a schematic diagram of the drive turntable and drive block.

[0035] Figure 7 This is a schematic diagram showing the positional relationship between the safety insert, drive block, and gear shift slide.

[0036] Figure 8 This is a schematic diagram of the gear shift lever and the sliding cover.

[0037] Figure 9 This is a schematic diagram of the base of the actuator housing.

[0038] Figure 1-9 In the middle section: 1. Actuator housing; 2. Gearbox; 3. Drive block; 4. Operating handle; 5. Safety insert; 6. Gear plate; 7. Manual operation hole; 8. Operating tool; 9. Guide hole; 10. Blocking plate; 11. Guide boss; 12. Guide groove; 13. Intelligent circuit board; 14. First signal switch; 15. Switch action bar; 16. Second signal switch; 18. Action protrusion; 19. Sliding cover; 20. Connecting bayonet; 21. Connecting clip; 22. Positioning protrusion; 23. Elastic positioning plate; 24. Opening concave surface; 25. Closing concave surface; 26. Handle hole; 27. Operating plastic shell; 28. Receiving cavity; 29. ​​Insertion hole; 30. Drive turntable; 31. Blocking block. Detailed Implementation

[0039] 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.

[0040] 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.

[0041] This utility model provides a linkage self-locking mechanism for an automatic actuator of a circuit breaker.

[0042] In this embodiment, refer to Figure 1-9The circuit breaker automatic actuator has a linkage self-locking mechanism for use in the circuit breaker automatic actuator. The automatic actuator includes an actuator housing, a blocking block, a gearbox 2, a drive turntable 30, a drive motor, and a drive block 3. The drive block is connected to the operating handle of the circuit breaker.

[0043] The linkage self-locking mechanism includes a manual operation hole 7 at the gearbox input end, a safety insert plate 5, and a gear shift slide plate 6.

[0044] One end of the safety insert plate passes through the guide hole 9 of the actuator housing 1 and the gearbox and is connected to the blocking block 31, while the other end is partially exposed in the actuator housing as the operating end;

[0045] The gear shift slide is slidably connected to the actuator housing and is used to open or close the manual operation port;

[0046] A blocking plate 10 is provided on one side of the safety insert plate, a guide boss 11 is provided on the gear shift slide plate, and a guide groove 12 that slides with the guide boss 11 is provided on the outer wall of the gearbox.

[0047] When the safety insert is pulled out from the guide hole upwards, the blocking plate can abut against the guide boss to prevent the gear slide from sliding open to the manual operation hole side; when the gear slide slides open to the manual operation hole side, the guide boss can abut against the blocking plate to prevent the safety insert from being pulled out from the guide hole upwards.

[0048] In the above technical solution, the safety insert plate passes through the actuator housing and the gearbox guide hole, with one end connected to a blocking block and the other end serving as the operating end; the gear shift slide plate is slidably connected to the actuator housing to control the opening and closing of the manual operation hole; the safety insert plate is provided with a blocking plate, the gear shift slide plate is provided with a guide boss, and the gearbox is provided with a matching guide groove. When the safety insert plate is pulled out upwards, the blocking plate abuts against the guide boss to restrict the sliding of the gear shift slide plate; when the gear shift slide plate opens towards the manual operation hole side, the guide boss abuts against the blocking plate to restrict the safety insert plate from being pulled out, forming a two-way interlocking constraint.

[0049] It achieves two-way interlocking between manual operation and safety protection, completely avoiding the risk of misoperation. It prevents accidental manual closing after the safety plug is locked during maintenance, and also avoids mechanical interference caused by accidentally pulling out the safety plug during manual operation. The purely mechanical structure does not require electrical control, is not affected by environmental factors, and has reliable locking that is not prone to failure. The structure is achieved only by adding and matching simple components, making it simple and compact, reducing assembly and manufacturing costs, and adapting to existing automatic actuator bodies with strong compatibility.

[0050] Specifically, it also includes a smart circuit board 13, and a first signal switch 14 is provided on one side of the gear shift slide. The first signal switch 14 interacts with the switch action bar 15 on the gear shift slide.

[0051] A second signal switch 16 is provided at the bottom of the gearbox, and an action protrusion 18 that interacts with the second signal switch is provided on the outer edge of the drive turntable.

[0052] Both the first and second signal switches are connected to the intelligent circuit board to detect the opening and closing status of the manual operation hole and the rotation status of the drive turntable, thereby realizing electrical signal linkage control.

[0053] In this embodiment, an intelligent circuit board is added as the control core. The first signal switch cooperates with the switch action bar of the gear slide. When the gear slide slides, it triggers or disengages the switch, generating an electrical signal to feedback the opening and closing status of the manual operation hole. The second signal switch cooperates with the action protrusion on the outer edge of the drive turntable. When the turntable rotates, the action protrusion periodically triggers the switch, providing feedback on the turntable's rotation status. Both signal switches are connected to the intelligent circuit board, transmitting the detection signals to the circuit board to achieve linkage control.

[0054] It enables precise monitoring of electrical signals for operation and running status, providing data support for automated control; it can also cut off conflicting drive power supplies and trigger abnormal alarms to avoid conflicts between manual and automatic operations and the risk of abnormal equipment operation; it improves the intelligence level of the device, making it easier for maintenance personnel to detect faults in a timely manner and reducing maintenance difficulty and safety hazards.

[0055] Specifically, an operation opening and closing assembly is slidably connected to the cover of the actuator housing. The operation opening and closing assembly includes a sliding cover 19 that slides with the actuator housing and the aforementioned gear plate connected to the sliding cover.

[0056] The sliding cover is provided with a connecting clip 21 that is adapted to the connecting slot 20 of the gear slide plate, so as to realize the synchronous sliding of the sliding cover and the gear slide plate.

[0057] The gear shift slide is provided with positioning protrusions 22 on both sides, and the bottom wall of the actuator housing is provided with an elastic positioning plate 23. The elastic positioning plate is provided with an opening concave surface 24 and a closing concave surface 25 that are adapted to the positioning protrusions, which are used to stably position the gear shift slide in the open or closed state.

[0058] In this embodiment, the operation opening and closing component consists of a sliding cover and a gear plate. The sliding cover is adapted to the gear plate through a connecting clip, so that the two slide synchronously. Positioning protrusions are set on both sides of the gear plate, and the elastic positioning plate on the bottom wall of the actuator housing is provided with an opening concave surface and a closing concave surface. The positioning protrusions engage with the corresponding concave surfaces to achieve stable positioning of the gear plate in the open and closed states, thereby controlling the opening and closing of the manual operation hole.

[0059] The sliding cover and gear shift slide slide synchronously, making operation convenient and providing intuitive feedback on the status of the manual operation hole; the elastic positioning structure ensures stable positioning of the gear shift slide, preventing accidental opening and closing of the manual operation hole due to accidental sliding; the connection structure is simple and reliable, easy to assemble, and can cover the manual operation hole when closed, preventing dust and debris from entering, protecting internal components, and extending the service life of the device.

[0060] The actuator housing includes a cover and a base that fit together.

[0061] Specifically, the operating end of the safety plug is provided with a handle hole 26, which makes it easy for the operator to insert and remove the safety plug;

[0062] The blocking block is adapted to one side of the driving block. When the safety plug is pulled out, the blocking block can abut against the driving block to mechanically prevent the driving block from sliding to the closing side and prevent accidental closing.

[0063] In this embodiment, a handle hole is provided at the operating end of the safety plug to provide a force point for the operator to insert and remove the safety plug, which facilitates quick and convenient operation; the blocking block connected to the safety plug is adapted to one side of the drive block. When the safety plug is pulled out, the blocking block abuts against the drive block, and the mechanical limit prevents the drive block from sliding to the closing side, thereby achieving closing lock.

[0064] Specifically, it also includes an operating tool 8 adapted to the manual operating hole, wherein the manual operating hole is a hexagonal hole, the operating tool is a hexagonal wrench, and the hexagonal wrench is fitted with an operating plastic shell 27 to improve grip comfort;

[0065] The actuator housing is provided with a receiving cavity 28 for accommodating a hexagonal wrench and a insertion hole 29 for inserting the hexagonal wrench, realizing integrated storage and quick access to the operating tools.

[0066] In this embodiment, the manual operation hole is set as a hexagonal hole, and the matching operating tool is a hexagonal wrench. The high fit of the hexagonal structure is used to achieve stable power transmission. The hexagonal wrench is covered with an operating plastic shell to improve grip comfort. The actuator housing is provided with a receiving cavity and a plug-in hole (set on the base of the actuator housing) for storing and plugging in the hexagonal wrench, realizing integrated storage of tools and devices.

[0067] 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 linkage self-locking mechanism of a circuit breaker automatic executor, for a circuit breaker automatic executor, the automatic executor comprising an executor shell, a blocking block, a gear box, a driving turntable, a driving motor and a driving block connected with an operating handle of a circuit breaker, characterized in that: the linkage self-locking mechanism comprises a manually operated hole at an input end of the gear box, a safety plug and a gear sliding plate; one end of the safety plug is connected with the blocking block through a guide hole of the executor shell and the gear box, and the other end is partially exposed on the executor shell as an operating end; the gear sliding plate is slidingly connected on the executor shell and is used for opening or closing the manually operated hole; a blocking piece is arranged on one side of the safety plug, a guide boss is arranged on the gear sliding plate, and a guide sliding groove slidingly matched with the guide boss is arranged on an outer wall of the gear box; when the safety plug is partially extracted upward from the guide hole, the blocking piece can abut against the guide boss and is used for blocking the gear sliding plate from sliding to one side of the manually operated hole; when the gear sliding plate is slidingly opened to one side of the manually operated hole, the guide boss can abut against the blocking piece and is used for preventing the safety plug from being extracted upward from the guide hole. Further comprising an intelligent circuit board, one side of the gear sliding plate is provided with a first signal switch, and the first signal switch interacts with a switch acting strip on the gear sliding plate; a second signal switch is arranged at a bottom of the gear box, and an acting protrusion interacting with the second signal switch is arranged on an outer edge of the driving turntable; the first signal switch and the second signal switch are connected with the intelligent circuit board and are used for detecting an opening and closing state of the manually operated hole and a rotating state of the driving turntable, so as to realize electric signal linkage control. A cover of the executor shell is slidingly connected with an operating opening and closing assembly, the operating opening and closing assembly comprises a sliding cover slidingly matched with the executor shell and the above-mentioned gear sliding plate connected with the sliding cover; a connecting clamping piece matched with a connecting socket of the gear sliding plate is arranged on the sliding cover, so as to realize synchronous sliding of the sliding cover and the gear sliding plate; positioning protrusions are arranged on two sides of the gear sliding plate, a bottom wall of the executor shell is provided with elastic positioning pieces, and the elastic positioning pieces are provided with opening concaves and closing concaves matched with the positioning protrusions, so as to stably position the gear sliding plate in an opening state or a closing state. A handle hole is arranged on the operating end of the safety plug, so as to facilitate an operator to extract or plug the safety plug; the blocking block is matched with one side of the driving block, the blocking block can abut against the driving block when the safety plug is extracted, so as to mechanically block the driving block from sliding to a closing side and prevent mis-closing. Further comprising an operating tool matched with the manually operated hole, the manually operated hole is a hexagonal hole, the operating tool is a hexagonal wrench, and a plastic shell is sleeved on the hexagonal wrench to improve holding comfort; a containing cavity containing the hexagonal wrench and a plug-in hole plugging the hexagonal wrench are arranged in the executor shell, so as to realize integrated storage and quick taking of the operating tool. ​ 2. The self-locking linkage mechanism of an automatic circuit breaker actuator according to claim 1, characterized in that: ​ ​ ​ 3. The self-locking linkage mechanism of an automatic circuit breaker actuator according to claim 1, characterized in that: ​ ​ ​ 4. The self-locking linkage mechanism of an automatic circuit breaker actuator according to claim 1, characterized in that: ​ ​ 5. The self-locking linkage mechanism of an automatic circuit breaker actuator according to claim 1, wherein: ​ ​

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