An interlock device for electrical equipment circuit breaker

Abstract

The utility model provides a kind of for electrical equipment circuit breaker interlocking device, it is related to circuit breaker field, the interlocking device for electrical equipment circuit breaker described in the utility model includes two housings, the inside rotation of housing is connected with handle, the one side of handle is fixedly connected with mounting plate, the top and bottom of mounting plate are all set up with mounting groove, the inside screwing of mounting groove has mounting bracket, the inside rotation of mounting bracket is connected with five gyro wheels, and the gyro wheel is sequentially arranged, the interlocking device for electrical equipment circuit breaker described in the utility model can keep stable locking state when bearing external vibration, impact and other interference, enhance the anti-interference ability of device, greatly reduce the manpower required for operation, reduce the work intensity of operator;Reduce the wear and tear of component due to friction, prolong the service life of interlocking device, reduce the maintenance cost and replacement frequency of equipment.

Description

Technical Field

[0001] This utility model relates to an interlocking device for electrical equipment circuit breakers, specifically an interlocking device for electrical equipment circuit breakers, belonging to the field of circuit breaker technology. Background Technology

[0002] A circuit breaker is a device that opens or closes a load or interrupts current when a fault such as grounding or short circuit occurs in a power transmission and distribution system or circuit. In addition, a circuit breaker with a disconnecting part insulated by insulating material protects the power system and load devices by manually opening or closing the circuit under normal use, or by opening or closing the circuit at a remote distance by an external electrical operating device such as a metal container, or by automatically opening the circuit when an overload or short circuit occurs. In order to disconnect the circuit, the disconnecting part of the circuit breaker is provided with a fixed contactor and a movable contactor. Accordingly, the fixed contactor and the movable contactor are usually in contact with each other to allow current to flow. When a large current flows due to a fault occurring elsewhere in the line, the movable contactor separates from the fixed contactor to interrupt the current.

[0003] The prior art patent application (application number 202120670422.5) entitled "A strip circuit breaker for interlocking and its interlocking device" includes a housing and a handle. The handle is slidably connected to the housing. The front end of the handle has a guide portion supporting the sliding of the interlocking device along the width direction of the housing, and a connecting portion for connecting the interlocking device. This connecting portion allows the interlocking device to slide along the width direction of the housing and is used to connect with the interlocking device to maintain the handle and housing in the open position. This device provides a circuit breaker and its interlocking device with a simple structure that can simultaneously lock multiple handles in the open position.

[0004] However, the large-head pin, as the key connection between the positioning component and the interlocking component, is prone to wear and increased gaps due to continuous friction between the pin and the connecting part during long-term and frequent use. This can lead to the pin becoming loose. Once the pin becomes loose, the sliding trajectory of the interlocking component cannot be accurately restricted, which may result in abnormal sliding and significantly reduce the locking effect. On the other hand, the device relies on the mechanical cooperation of the sliding component. The interlocking component achieves the locking function by interacting with the locking part of the handle. This long-term mechanical friction will cause the interlocking component to gradually wear down, leading to loosening or jamming. Loosening will prevent the interlocking component from reliably locking the handle, posing a risk of accidental unlocking. Jamming will make it difficult for the interlocking component to slide normally, affecting normal locking and unlocking operations and greatly reducing the interlocking effect. Therefore, a new technical solution needs to be designed to address this issue. Utility Model Content

[0005] The purpose of this utility model is to provide an interlocking device for circuit breakers of electrical equipment to solve the above-mentioned problems. In the prior art, the large-head pin, as the key to the connection between the positioning component and the interlocking component, is prone to wear and increased gap due to continuous friction between the pin and the connecting part during long-term and frequent use. This leads to the pin loosening, which greatly reduces the locking effect and causes the interlocking component to gradually wear down, resulting in loosening or jamming. Loosening will cause the interlocking component to fail to reliably lock the handle, posing a risk of accidental unlocking.

[0006] This utility model is achieved through the following technical solution: an interlocking device for circuit breakers of electrical equipment.

[0007] The device comprises two housings, with a handle rotatably connected to the inner side of each housing. A mounting plate is fixedly connected to one side of each handle. Mounting grooves are provided at the top and bottom of each mounting plate. A mounting bracket is screwed into the inner side of each mounting groove. Five rollers are rotatably connected to the inner side of each mounting bracket, and the rollers are arranged sequentially. By setting the mounting bracket and rollers on the mounting plate, when the limiting plate slides, the rollers can convert sliding friction into rolling friction, effectively reducing the resistance when the limiting plate slides, making the sliding of the limiting plate smoother, reducing component wear, and extending the service life of the device.

[0008] Preferably, a limiting plate is slidably connected between the outer sides of the two mounting plates. The limiting plate and the inner side of the limiting plate are in contact with the roller. A limiting groove is formed on one side of the limiting plate. The limiting plate and the roller cooperate to realize the sliding limiting function. The setting of the limiting groove provides a precise limiting interface for other components, which facilitates engagement with other limiting structures, realizes the locking and positioning of the handle or related components, and can effectively prevent the handle from rotating accidentally.

[0009] Preferably, a connecting chamber is fixedly connected between the inner sides of the two outer shells. A compression spring is embedded in the inner cavity of the connecting chamber. One end of the compression spring is fixedly connected to a pressing plate. The compression spring and the pressing plate in the connecting chamber form an elastic buffer and pressure application structure. When the mounting rod pushes the pressing plate, the compression spring can generate corresponding elastic deformation according to the force, providing adjustable pressure and realizing flexible compression of the relevant components.

[0010] Preferably, the inner cavity of the connecting compartment has two slots, and a first through slot is provided on one side of the connecting compartment. The slots provide a locking position for the mounting rod, which can accurately position and fix the mounting rod, ensuring that the mounting rod is stable in position during operation and will not move arbitrarily, thus ensuring the coordinated operation of all components in the connecting compartment.

[0011] Preferably, a guide frame is fixedly connected to one side of the connecting compartment, and a second through groove is provided on one side of the guide frame. The design of the guide frame and the second through groove provides precise guidance for the movement of the installation rod, which can effectively prevent the installation rod from deviating or tilting during the movement and ensure that the installation rod moves smoothly along the predetermined direction.

[0012] Preferably, an installation rod is movably connected to the inner side of the second through groove, one end of the installation rod extends through the first through groove to the inner cavity of the connecting chamber, and one end of the installation rod contacts the extrusion plate.

[0013] Preferably, two locking rods are fixedly connected to the outer side of the mounting rod. The locking rods engage with the locking slots, and the engagement between the locking rods and the locking slots can reliably lock the mounting rod, preventing it from loosening or shifting due to external forces during operation, and ensuring the stability and accuracy of the pressure applied inside the connection chamber. At the same time, this locking structure facilitates the quick installation and removal of the mounting rod. When it is necessary to debug, repair, or replace parts of the device, the mounting rod can be easily detached from the locking slot.

[0014] This utility model provides an interlocking device for circuit breakers in electrical equipment, which has the following beneficial effects:

[0015] 1. This interlocking device for circuit breakers in electrical equipment, through a low-friction mechanism, which cooperates with a limit plate via rollers, can significantly reduce the frictional resistance between the various components of the interlocking device, making the sliding operation of the interlocking components smoother, greatly reducing the manpower required for operation, reducing the workload of operators; reducing wear of components caused by friction, extending the service life of the interlocking device, and reducing the maintenance cost and replacement frequency of the equipment.

[0016] 2. This interlocking device for circuit breakers in electrical equipment uses a limit plate locking mechanism to precisely limit and reliably lock the circuit breaker handle or related components, effectively preventing accidental closing or opening of the circuit breaker and ensuring the safety of electrical equipment during maintenance or specific working conditions. The locking effect of the limit plate allows the interlocking device to maintain a stable locked state even when subjected to external vibrations, impacts, and other interferences, enhancing the device's anti-interference capability. Attached Figure Description

[0017] Figure 1 This is a front-view three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the low-friction mechanism structure of this utility model;

[0019] Figure 3 This is a cross-sectional view of the limiting plate locking mechanism of this utility model;

[0020] Figure 4 This is a schematic diagram of the disassembled structure of the limiting plate locking mechanism of this utility model;

[0021] [Explanation of Key Component Symbols]

[0022] 1. Outer shell; 101. Handle;

[0023] 2. Mounting plate; 201. Mounting slot; 202. Mounting bracket; 203. Rollers;

[0024] 3. Limiting plate; 301. Limiting groove;

[0025] 4. Connecting chamber; 401. Compression spring; 402. Extrusion plate; 403. Slot; 404. First through slot

[0026] 5. Guide frame; 501. Second through slot; 502. Mounting rod; 503. Locking rod. Detailed Implementation

[0027] This utility model provides an interlocking device for circuit breakers in electrical equipment.

[0028] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 It includes two outer shells 1. A handle 101 is rotatably connected to the inner side of the outer shell 1. A mounting plate 2 is fixedly connected to one side of the handle 101. Mounting slots 201 are provided on the top and bottom of the mounting plate 2. A mounting bracket 202 is screwed to the inner side of the mounting slot 201. Five rollers 203 are rotatably connected to the inner side of the mounting bracket 202, and the rollers 203 are arranged in sequence.

[0029] Please refer to it again. Figure 1 and Figure 2 A limiting plate 3 is slidably connected between the outer sides of the two mounting plates 2. The limiting plate 3 is in contact with the inner side of the roller 203. A limiting groove 301 is opened on one side of the limiting plate 3.

[0030] When the limiting plate 3 needs to slide, the sliding motion of the limiting plate 3 changes from traditional sliding friction to rolling friction of the roller 203 because the inner side of the limiting plate 3 is in contact with the roller 203. Compared with sliding friction, the resistance of rolling friction is greatly reduced, allowing the limiting plate 3 to slide more easily and smoothly between the outer sides of the two mounting plates 2. The limiting groove 301 on the limiting plate 3 can cooperate with the mounting rod 502 to achieve precise limiting and locking functions after the limiting plate 3 slides to the predetermined position, thereby completing the operation restriction of the circuit breaker handle 101 or related components.

[0031] Please refer to it again. Figure 1 , Figure 3 and Figure 4 A connecting chamber 4 is fixedly connected between the inner sides of the two outer shells 1. A compression spring 401 is embedded in the inner cavity of the connecting chamber 4. One end of the compression spring 401 is fixedly connected to a pressing plate 402. Two slots 403 are opened in the inner cavity of the connecting chamber 4. A first through groove 404 is opened on one side of the connecting chamber 4. A guide frame 5 is fixedly connected to one side of the connecting chamber 4. A second through groove 501 is opened on one side of the guide frame 5. An installation rod 502 is movably connected to the inner side of the second through groove 501. One end of the installation rod 502 extends into the inner cavity of the connecting chamber 4 through the first through groove 404, and one end of the installation rod 502 contacts the pressing plate 402. Two locking rods 503 are fixedly connected to the outer side of the installation rod 502. The locking rods 503 engage with the slots 403.

[0032] When it is necessary to lock the limiting plate 3, push the mounting rod 502. Since the second through slot 501 on the guide frame 5 guides the mounting rod 502, the mounting rod 502 will move smoothly in the predetermined direction. One end of the mounting rod 502 extends into the inner cavity of the connecting chamber 4 through the first through slot 404 and contacts the extrusion plate 402. As the mounting rod 502 continues to advance, the extrusion plate 402 is pushed and compresses the compression spring 401 in the inner cavity of the connecting chamber 4. The compression spring 401 generates elastic deformation and accumulates elastic potential energy. Then, rotate the locking rod 503 on the outside of the mounting rod 502 to align with and engage with the slot 403 in the inner cavity of the connecting chamber 4. At this time, the cooperation between the locking rod 503 and the slot 403 restricts the mounting rod 502. 02. Move to fix its position. The compressed clamping spring 401 continuously applies pressure through the compression plate 402, transmitting the force to the mounting rod 502, thereby locking the limit plate 3 and ensuring that the limit plate 3 is stably held in a specific position, completing the reliable locking of components such as the circuit breaker handle 101. When it is necessary to release the lock, push the mounting rod 502 to compress the clamping spring 401, causing the locking rod 503 on the mounting rod 502 to disengage from the slot 403. Then rotate the mounting rod 502 to rotate the locking rod 503 to the first through slot 404. After that, pull the mounting rod 502 outward to disengage the locking rod 503 from the connecting chamber 4, thereby unlocking the limit plate 3 for subsequent operations.

[0033] Working principle: When the sliding limit plate 3 needs to be slidable, since the inner side of the limit plate 3 is in contact with the roller 203, the sliding motion of the limit plate 3 changes from traditional sliding friction to rolling friction of the roller 203. Compared with sliding friction, the resistance of rolling friction is greatly reduced, allowing the limit plate 3 to slide more easily and smoothly between the outer sides of the two mounting plates 2. The limiting groove 301 on the limiting plate 3 can cooperate with the mounting rod 502. After the limiting plate 3 slides to the predetermined position, it can achieve precise limiting and locking functions, thereby completing the operation restriction of the circuit breaker handle 101 or related components. When it is necessary to lock the limiting plate 3, the mounting rod 502 is pushed. Since the second through groove 501 on the guide frame 5 guides the mounting rod 502, the mounting rod 502 will move smoothly along the predetermined direction. One end of the mounting rod 502 extends into the inner cavity of the connecting chamber 4 through the first through groove 404 and contacts the pressing plate 402. As the mounting rod 502 continues to advance, the pressing plate 402 is pushed and compresses the compression spring 401 in the inner cavity of the connecting chamber 4. The compression spring 401 generates elastic deformation and accumulates elastic potential energy. Then, the mounting rod 502 is rotated to make the locking rod 503 on the outside of the mounting rod 502... Align and engage with the slot 403 inside the connecting chamber 4. At this time, the engagement of the locking rod 503 and the slot 403 restricts the movement of the mounting rod 502, fixing its position. The compressed clamping spring 401 continuously applies pressure through the compression plate 402, transmitting the force to the mounting rod 502, thereby locking the limit plate 3 and ensuring that the limit plate 3 is stably held in a specific position, completing the reliable locking of components such as the circuit breaker handle 101. When it is necessary to release the lock, push the mounting rod 502 to compress the clamping spring 401, causing the locking rod 503 on the mounting rod 502 to disengage from the slot 403. Then rotate the mounting rod 502 to rotate the locking rod 503 to the first through slot 404, and then pull the mounting rod 502 outward to disengage the locking rod 503 from the connecting chamber 4, thereby unlocking the limit plate 3 for subsequent operations.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An interlocking device for electrical equipment circuit breakers comprising two housings (1), characterized in that: A handle (101) is rotatably connected to the inside of the outer casing (1). A mounting plate (2) is fixedly connected to one side of the handle (101). The top and bottom of the mounting plate (2) are provided with mounting grooves (201). A mounting bracket (202) is screwed into the inner side of the mounting groove (201). Five rollers (203) are rotatably connected to the inner side of the mounting bracket (202), and the rollers (203) are arranged in sequence.

2. The interlocking device for circuit breakers of electrical equipment according to claim 1, characterized in that: A limiting plate (3) is slidably connected between the outer sides of the two mounting plates (2). The limiting plate (3) is in contact with the roller (203) on its inner side. A limiting groove (301) is provided on one side of the limiting plate (3).

3. An interlock for an electrical device circuit breaker according to claim 1, wherein: A connecting chamber (4) is fixedly connected between the inner sides of the two outer shells (1). A compression spring (401) is embedded in the inner cavity of the connecting chamber (4). A compression plate (402) is fixedly connected to one end of the compression spring (401).

4. An interlock for an electrical device circuit breaker according to claim 3, wherein: The inner cavity of the connecting compartment (4) has two slots (403), and a first through slot (404) is provided on one side of the connecting compartment (4).

5. An interlock for an electrical device circuit breaker according to claim 4, wherein: A guide frame (5) is fixedly connected to one side of the connecting compartment (4), and a second through groove (501) is provided on one side of the guide frame (5).

6. An interlock for an electrical device circuit breaker according to claim 5, wherein: An installation rod (502) is movably connected to the inner side of the second through groove (501). One end of the installation rod (502) extends through the first through groove (404) to the inner cavity of the connecting chamber (4), and one end of the installation rod (502) contacts the extrusion plate (402).

7. An interlock for an electrical device circuit breaker according to claim 6, wherein: Two locking rods (503) are fixedly connected to the outside of the mounting rod (502), and the locking rods (503) are engaged with the locking groove (403).

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