Anti-misoperation locking structure of molded case circuit breaker

Abstract

The utility model discloses an anti-misoperation locking structure of a molded case circuit breaker, and relates to the field of equipment maintenance auxiliary tools, the anti-misoperation locking structure of the molded case circuit breaker is characterized in that through the arrangement of a locking mechanism arranged on the surface of a locking shell, when a handle needs to be operated, an L-shaped rod is firstly rotated downwards, and then the L-shaped rod is rotated downwards; the claw piece driven by the axis drives the tip block to press the sharp-corner spring to store energy with the fixing column as a rotating fulcrum, the downward rotating angle of the L-shaped rod is increased, the other protruding block of the claw piece makes contact with the fixing column to limit the rotating angle, at the moment, the L-shaped rod is far away from the lower portion of the handle, the handle can be operated, and after operation is finished, the L-shaped rod is loosened, so that energy is saved. When the handle is rotated, the sharp-angled spring releases elastic force to push the cleat piece to rapidly rebound, and the L-shaped rod completes recovery action, so that mechanical locking formed by the L-shaped rod enforces an operator to execute clear rotation action, the hidden danger of misoperation caused by directly shifting the handle is eliminated, and the probability of protection parameter imbalance or equipment damage caused by random operation is reduced.

Description

Anti-misoperation interlocking structure for molded case circuit breakers Technical Field

[0001] This utility model relates to the field of auxiliary tools for equipment maintenance and repair, specifically a locking structure for preventing misoperation of molded case circuit breakers. Background Technology

[0002] A circuit breaker is a switching device that can close, carry, and interrupt current under normal circuit conditions and can close, carry, and interrupt current under abnormal circuit conditions within a specified time. Among them, molded case circuit breakers can automatically cut off the current after the current exceeds the trip setting. Molded case refers to the use of plastic insulators as the outer shell of the device to isolate conductors and grounded metal parts. Because molded case circuit breakers are installed in large numbers and are not designed with anti-misoperation interlocking devices, there is a risk of accidental closing during maintenance.

[0003] Utility model patent CN218182140U discloses a front-mounted, adjustable-locking anti-misoperation device for molded case circuit breakers. The device includes a left-side component and a right-side component. The left-side component includes a left-side plate with an upper connecting rod, a sliding rod, and a lower sliding rod vertically arranged from top to bottom on the left-side plate. The right-side component includes a right-side plate with an upper sliding cylinder, a middle sleeve, and a lower sliding cylinder vertically arranged from top to bottom on the right-side plate. The upper connecting rod, sliding rod, and lower sliding rod are respectively fitted into the upper sliding cylinder, middle sleeve, and lower sliding cylinder. An adjustment device is provided between the middle sleeve and the sliding rod. The adjustment device includes a tensioning sleeve, which includes an upper nut and a lower nut. Either the upper nut or the lower nut is fixedly connected to the left end of the middle sleeve, and the connecting post is threaded. This utility model provides an anti-misoperation closing device for the maintenance of molded case circuit breakers in combiner cabinets, preventing the molded case circuit breaker from being accidentally closed during inverter maintenance and ensuring the safety of maintenance personnel.

[0004] However, the anti-misoperation device adopts a fixed multi-baffle structure, which cannot be moved by sliding. This means that the protective cover needs to be completely disassembled during equipment maintenance or operation, which increases the complexity of operation. At the same time, the handle is fixed by moving the limit rod up and down, which is a cumbersome operation and may affect the response speed in emergency scenarios. Summary of the Invention

[0005] This utility model provides an anti-misoperation interlocking structure for molded case circuit breakers to solve the problem that the existing anti-misoperation device adopts a fixed multi-baffle structure, which cannot be moved by sliding, resulting in the need to completely disassemble the protective cover during equipment maintenance or operation, increasing the complexity of operation. At the same time, the operation steps are cumbersome, and the handle is fixed by moving the limit rod up and down, which may affect the response speed in emergency scenarios.

[0006] This utility model provides the following technical solution: a lockout structure for preventing misoperation of a molded case circuit breaker, comprising a body and a protective cover disposed on the surface of the body, and further comprising: slide rails disposed on both sides of the body, wherein a sliding mechanism is slidably connected inside the slide rails, the sliding mechanism comprising a slider, a compression spring, a protrusion, a groove and a side plate; an adjustment mechanism disposed on both sides of the protective cover, wherein the adjustment mechanism comprises a threaded sleeve and a threaded rod; and a locking shell disposed on the surface of the body, wherein a locking mechanism is connected through the surface of the locking shell, the locking mechanism comprising an L-shaped rod, a washer, a pointed spring, a fixing post, a snap-fit ​​groove, a horn plate and a snap ring.

[0007] As a preferred embodiment of this utility model, the slider is slidably connected to the inside of the slide rail, a circular hole is provided on one side of the slider, a compression spring is fixedly connected inside the circular hole, a protrusion is fixedly connected to one end of the compression spring, two sets of grooves are provided on one side of the slide rail, and a side plate is fixedly connected to one side of the slider.

[0008] As a preferred technical solution of this utility model, multiple sets of threaded sleeves are arranged on both sides of the protective cover, and the internal threads of the multiple sets of threaded sleeves are connected to threaded rods.

[0009] As a preferred embodiment of this utility model, the L-shaped rod is connected through to one side of the locking shell, a washer is sleeved on one side of the L-shaped rod, a pointed spring is provided on one side of the washer, a fixing post is provided on one side of the pointed spring, two sets of buckle grooves are provided at one end of the L-shaped rod, a horn piece is engaged with the surface of the two sets of buckle grooves, and an annular groove is provided on the surface of one end of the L-shaped rod, a retaining spring is engaged with the surface of the annular groove.

[0010] As a preferred technical solution of this utility model, a plurality of threaded holes are provided on one side of the side plate, and the threaded rod is connected through the interior of the threaded holes.

[0011] As a preferred embodiment of this utility model, the two ends of the pointed spring are provided with limit blocks, and the two sets of limit blocks are located crosswise on both sides of the fixed column.

[0012] As a preferred embodiment of this utility model, two sets of protruding blocks are fixedly connected to the surface of the ram's horn piece, and the two sets of protruding blocks are respectively located on both sides of the fixing post. A pointed block is fixedly connected to one side of the ram's horn piece.

[0013] As a preferred embodiment of this utility model, a handle is rotatably connected to one side of the main body, and the L-shaped rod is located below the handle.

[0014] Compared with the prior art, this utility model provides a lockout structure for preventing misoperation of molded case circuit breakers, which has the following beneficial effects:

[0015] 1. The anti-misoperation interlocking structure of this molded case circuit breaker, through the locking mechanism set on the surface of the locking case, allows the L-shaped rod to be rotated downwards when the handle needs to be operated. The axially driven horn plate rotates around the fixed post as the fulcrum, causing the tip block to compress the horn spring to store energy. As the downward rotation angle of the L-shaped rod increases, another protruding block of the horn plate contacts the fixed post, limiting the rotation angle. At this time, the L-shaped rod is away from the bottom of the handle, and the handle can be operated. After the operation is completed, the L-shaped rod is released, the horn spring releases its elasticity, and pushes the horn plate to quickly rebound. The L-shaped rod completes the recovery action. Thus, the mechanical interlocking formed by the L-shaped rod forces the operator to perform a specific rotation action, eliminating the risk of misoperation caused by directly turning the handle, and reducing the probability of protection parameter misalignment or equipment damage due to arbitrary operation.

[0016] 2. The anti-misoperation interlocking structure of this molded case circuit breaker, through the sliding mechanism set on both sides of the slide rail, when the protective cover is in the closed position, the limiting protrusion on one side of the top of the slider is embedded in the groove at the starting end of the slide rail, forming a mechanical lock and preventing the protective cover from sliding downward. When the protective cover is opened, a horizontal downward pushing force is applied along both slide rails to make the protective cover slide downward. The inclined surface of the groove guides the protrusion to disengage from the starting groove. When the side plate moves to the end of the slide rail, the limiting protrusion accurately engages in the end groove with a "click" tactile feedback. At this time, the cover is completely fixed, and the handle operation area is exposed. This allows the circuit breaker operation panel to be exposed without the need for complete disassembly, avoiding the cumbersome process of repeated disassembly and reassembly required for maintenance of traditional fixed multi-plate protective covers, significantly shortening maintenance time, and preventing safety accidents caused by accidental touch operation. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 is a schematic diagram of the sliding mechanism of this utility model;

[0019] Figure 3 is a schematic diagram of the adjustment mechanism of this utility model;

[0020] Figure 4 is a schematic diagram of the locking mechanism of this utility model.

[0021] In the diagram: 1. Body; 2. Protective cover; 3. Slide rail; 4. Sliding mechanism; 401. Slider; 402. Compression spring; 403. Protrusion; 404. Groove; 405. Side plate; 5. Adjustment mechanism; 501. Threaded sleeve; 502. Threaded rod; 6. Locking shell; 7. Locking mechanism; 701. L-shaped rod; 702. Washer; 703. Pointed spring; 704. Fixed post; 705. Snap-on groove; 706. Horn plate; 707. Snap ring; 8. Limiting block; 9. Protrusion; 10. Pointed block; 11. Handle. Detailed Implementation

[0022] 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.

[0023] Please refer to Figures 1-4. This utility model discloses an anti-misoperation interlocking structure for a molded case circuit breaker, including a body 1 and a protective cover 2 disposed on the surface of the body 1. It also includes: slide rails 3 disposed on both sides of the body 1, with a sliding mechanism 4 slidably connected inside the slide rails 3. The sliding mechanism 4 includes a slider 401, a compression spring 402, a protrusion 403, a groove 404, and a side plate 405; an adjustment mechanism 5 disposed on both sides of the protective cover 2, with a threaded sleeve 501 and a threaded rod 502; and a locking shell 6 disposed on the surface of the body 1, with a locking mechanism 7 penetrating through the surface of the locking shell 6. The locking mechanism 7 includes an L-shaped rod 701, a washer 702, a pointed spring 703, a fixing post 704, a buckle groove 705, a horn plate 706, and a snap ring 707.

[0024] Specifically, slider 401 is slidably connected to the inside of slide rail 3. A round hole is provided on one side of slider 401. A compression spring 402 is fixedly connected inside the round hole. A protrusion 403 is fixedly connected to one end of compression spring 402. Two sets of grooves 404 are provided on one side of slide rail 3. A side plate 405 is fixedly connected to one side of slider 401.

[0025] In this embodiment, when the protective cover 2 is in the closed position, the limiting protrusion 403 on one side of the top of the slider 401 is embedded in the groove 404 at the starting end of the slide rail 3, forming a mechanical locking and preventing the protective cover 2 from sliding downward. When the protective cover 2 is opened, a horizontal downward pushing force is applied along the double slide rails 3 to make the protective cover 2 slide downward. The inclined surface of the groove 404 guides the protrusion 403 to disengage from the starting groove 404. When the side plate 405 moves to the end of the slide rail 3, the limiting protrusion 403 is precisely engaged in the end groove 404 with a "click" tactile feedback. At this time, the cover is completely fixed and the operating area of ​​the handle 11 is exposed.

[0026] Specifically, multiple sets of threaded sleeves 501 are installed on both sides of the protective cover 2, and the internal threads of the multiple sets of threaded sleeves 501 are connected to threaded rods 502.

[0027] In this embodiment, the threaded rods 502 (with reverse threads on both sides) that pass through the side plates 405 and the protective cover 2 are rotated. When rotated clockwise, the threads on both sides synchronously drive the side plates 405 to expand the spacing outward, while rotating counterclockwise causes the side plates 405 to contract inward. After adjusting to the target spacing, the side plates 405 fit tightly against the circuit breaker housing, thus adapting to molded case circuit breakers with width differences within a certain range, avoiding the problem of poor model universality caused by the fixed size of the traditional protective cover 2.

[0028] Specifically, an L-shaped rod 701 is connected through one side of the locking housing 6. A washer 702 is sleeved on one side of the L-shaped rod 701. A pointed spring 703 is provided on one side of the washer 702. A fixing post 704 is provided on one side of the pointed spring 703. Two sets of latching grooves 705 are opened at one end of the L-shaped rod 701. A horn piece 706 is latched on the surface of the two sets of latching grooves 705. An annular groove is opened on the surface of one end of the L-shaped rod 701. A retaining spring 707 is latched on the surface of the annular groove.

[0029] In this embodiment, when it is necessary to operate the handle 11, the L-shaped rod 701 is first rotated downwards. The horn plate 706 driven by its axis rotates around the fixed post 704 as the pivot point, driving the tip block 10 to compress the pointed spring 703 to store energy. As the downward rotation angle of the L-shaped rod 701 increases, the other protruding block 9 of the horn plate 706 contacts the fixed post 704, limiting the rotation angle. At this time, the L-shaped rod 701 is away from the bottom of the handle 11, and the handle 11 can be operated. After the operation is completed, the L-shaped rod 701 is released, the pointed spring 703 releases its elastic force, and pushes the horn plate 706 to quickly rebound, and the L-shaped rod 701 completes the recovery action.

[0030] Specifically, multiple sets of threaded holes are provided on one side of the side plate 405, and the threaded rod 502 passes through and is connected to the inside of the threaded holes.

[0031] In this embodiment, the side plate 405 and the protective cover 2 are connected by a threaded hole, and the distance between them is adjustable by the threaded sleeve 501 and the threaded rod 502.

[0032] Specifically, the two ends of the pointed spring 703 are provided with limit blocks 8, and the two sets of limit blocks 8 are located crosswise on both sides of the fixed post 704. The surface of the horn plate 706 is fixedly connected with two sets of protruding blocks 9, which are located on both sides of the fixed post 704 respectively. A pointed block 10 is fixedly connected to one side of the horn plate 706.

[0033] In this embodiment, the two sets of protruding blocks 9 on the surface of the ram's horn plate 706 are used to limit the rotation angle of the L-shaped rod 701, and the tip block 10 of the ram's horn plate 706 is used to compress the tip spring 703 to store force during rotation, so that the L-shaped rod 701 can return to its original shape after being released.

[0034] Specifically, a handle 11 is rotatably connected to one side of the main body 1, and an L-shaped rod 701 is located below the handle 11.

[0035] In this embodiment, the L-shaped lever 701 is located below the handle 11 and is used to lock the position of the handle 11. The mechanical lock formed by the L-shaped lever 701 forces the operator to perform a clear rotation action, eliminating the risk of misoperation caused by directly moving the handle 11.

[0036] The working principle and usage process of this utility model are as follows: When it is necessary to operate the handle 11, first rotate the L-shaped rod 701 downwards. The horn plate 706 driven by its axis rotates around the fixed post 704 as the pivot point, driving the tip block 10 to compress the pointed spring 703 to store energy. As the downward rotation angle of the L-shaped rod 701 increases, the other protruding block 9 of the horn plate 706 contacts the fixed post 704, limiting the rotation angle. At this time, the L-shaped rod 701 is away from the bottom of the handle 11, and the handle 11 can be operated. After the operation is completed, release the L-shaped rod 701, the pointed spring 703 releases its elastic force, and pushes the horn plate 706 to quickly rebound, and the L-shaped rod 701 completes the recovery action.

[0037] When the protective cover 2 is in the closed position, the limiting protrusion 403 on one side of the top of the slider 401 is embedded in the groove 404 at the starting end of the slide rail 3, forming a mechanical locking and preventing the protective cover 2 from sliding down. When the protective cover 2 is opened, a horizontal downward pushing force is applied along the double slide rails 3 to make the protective cover 2 slide down. The inclined surface of the groove 404 guides the protrusion 403 to disengage from the starting groove 404. When the side plate 405 moves to the end of the slide rail 3, the limiting protrusion 403 is precisely engaged in the end groove 404 with a "click" tactile feedback. At this time, the cover is completely fixed and the operating area of ​​the handle 11 is exposed.

[0038] In summary, the anti-misoperation interlocking structure of this molded case circuit breaker, through the locking mechanism 7 set on the surface of the locking housing 6 and the sliding mechanism 4 set on both sides of the slide rail 3, forces the operator to perform a specific rotation action before proceeding to the next operation of the handle 11. This eliminates the risk of misoperation caused by directly moving the handle 11, reduces the probability of protection parameter misalignment or equipment damage due to arbitrary operation, and exposes the circuit breaker operation panel without the need for complete disassembly. This avoids the cumbersome process of repeated disassembly and reassembly required during maintenance of the traditional fixed multi-plate protective cover 2, significantly shortens maintenance time, and also avoids safety accidents caused by unintentional touch operation.

[0039] It should be noted that, in this document, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lockout structure for preventing misoperation of a molded case circuit breaker, comprising a body (1) and a protective cover (2) disposed on the surface of the body (1), characterized in that, Also includes: The main body (1) has slide rails (3) on both sides, and a sliding mechanism (4) is slidably connected inside the slide rails (3). The sliding mechanism (4) includes a slider (401), a compression spring (402), a protrusion (403), a groove (404), and a side plate (405). The protective cover (2) has adjustment mechanisms (5) on both sides, and the adjustment mechanism (5) includes a threaded sleeve (501) and a threaded rod (502). The main body (1) has a locking shell (6) on its surface, and a locking mechanism (7) is connected through the surface of the locking shell (6). The locking mechanism (7) includes an L-shaped rod (701), a washer (702), a pointed spring (703), a fixing post (704), a buckle groove (705), a horn plate (706), and a snap ring (707).

2. The anti-misoperation interlocking structure for molded case circuit breakers according to claim 1, characterized in that: The slider (401) is slidably connected to the inside of the slide rail (3). A circular hole is provided on one side of the slider (401). A compression spring (402) is fixedly connected inside the circular hole. A protrusion (403) is fixedly connected to one end of the compression spring (402). Two sets of grooves (404) are provided on one side of the slide rail (3). A side plate (405) is fixedly connected to one side of the slider (401).

3. The anti-misoperation interlocking structure for molded case circuit breakers according to claim 1, characterized in that: Multiple sets of threaded sleeves (501) are provided on both sides of the protective cover (2), and the internal threads of the multiple sets of threaded sleeves (501) are connected to threaded rods (502).

4. The anti-misoperation interlocking structure for molded case circuit breakers according to claim 1, characterized in that: The L-shaped rod (701) is connected through to one side of the locking shell (6). A washer (702) is sleeved on one side of the L-shaped rod (701). A pointed spring (703) is provided on one side of the washer (702). A fixing post (704) is provided on one side of the pointed spring (703). Two sets of buckle grooves (705) are opened at one end of the L-shaped rod (701). A horn piece (706) is snapped onto the surface of the two sets of buckle grooves (705). An annular groove is opened on the surface of one end of the L-shaped rod (701). A retaining spring (707) is snapped onto the surface of the annular groove.

5. The anti-misoperation interlocking structure for molded case circuit breakers according to claim 1, characterized in that: The side plate (405) has multiple sets of threaded holes on one side, and the threaded rod (502) passes through and is connected to the inside of the threaded holes.

6. The anti-misoperation interlocking structure for molded case circuit breakers according to claim 1, characterized in that: The pointed spring (703) has limit blocks (8) at both ends, and the two sets of limit blocks (8) are located on both sides of the fixed column (704) at an intersection.

7. The anti-misoperation interlocking structure for molded case circuit breakers according to claim 6, characterized in that: Two sets of protruding blocks (9) are fixedly connected to the surface of the ram's horn plate (706). The two sets of protruding blocks (9) are located on both sides of the fixing post (704). A pointed block (10) is fixedly connected to one side of the ram's horn plate (706).

8. The anti-misoperation interlocking structure for molded case circuit breakers according to claim 1, characterized in that: A handle (11) is rotatably connected to one side of the body (1), and the L-shaped rod (701) is located below the handle (11).

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