Miniature circuit breaker operating mechanism in explosion-proof box

Abstract

A miniature circuit breaker operating mechanism in an explosion-proof box is used for driving an operating handle to enable an internal structure of a circuit breaker main body to be switched on and switched off and comprises a switch handle with a rotating shaft, a mounting part and a linkage part, the mounting part is arranged between the switch handle and the rear side of the circuit breaker main body, and a swing fulcrum is further arranged on the mounting part. The axis of the swing fulcrum is perpendicular to the axis of the rotating shaft, the linkage piece is installed on the swing fulcrum relative to the outer side of the installation piece, the linkage piece comprises a first linkage part and a second linkage part which are arranged at the two ends, the first linkage part is matched with the rotating shaft, and a first linkage structure is arranged between the first linkage part and the rotating shaft; the second linkage part is matched with the operating handle, a second linkage structure is arranged between the second linkage part and the operating handle, and the first linkage structure and the second linkage structure enable the operating handle and the switch handle to form linkage fit. According to the utility model, the miniature circuit breaker in the explosion-proof box can be controlled without opening the explosion-proof box, the overall structural design is reasonable, and the control is simple and convenient.

Description

Technical Field

[0001] This utility model relates to the field of explosion-proof electrical equipment technology, and in particular to a small circuit breaker operating mechanism inside an explosion-proof box. Background Technology

[0002] In electrical circuits, miniature circuit breakers (MCBs) are commonly used components, controlling the opening and closing of circuits. In industries prone to explosion, such as coal mining, paint and ink production, timber processing, marine wastewater treatment, and oil and gas extraction, MCBs are often sealed in explosion-proof enclosures. The explosion-proof enclosure prevents the MCBs from contacting air and causing an explosion, while also providing excellent protection and extending their service life. However, in actual use, controlling the opening and closing of the MCB requires opening the explosion-proof enclosure. This has drawbacks: opening the enclosure poses a safety hazard, as sparks from the MCB could cause an explosion in a potentially dangerous explosive environment. Furthermore, opening the enclosure exposes the MCB to air, affecting its lifespan. Therefore, a mechanism is needed to control the opening and closing of the sealed MCB within the explosion-proof enclosure. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a small circuit breaker operating mechanism in an explosion-proof box with a reasonable structural design and simple and convenient operation.

[0004] The technical solution adopted by this utility model to solve its technical problem is a small circuit breaker operating mechanism in an explosion-proof box, used to drive the operating handle to open and close the internal structure of the circuit breaker body. It includes a switch handle with a rotating shaft, a mounting part, and a linkage part. The mounting part is located between the switch handle and the rear side of the circuit breaker body. The mounting part is also provided with a swing fulcrum. The axis of the swing fulcrum is perpendicular to the axis of the rotating shaft. The linkage part is installed on the swing fulcrum on the outer side of the mounting part. The linkage part includes a first linkage part and a second linkage part with two ends. The first linkage part cooperates with the rotating shaft and a first linkage structure is provided between the two. The second linkage part cooperates with the operating handle and a second linkage structure is provided between the two. The first linkage structure and the second linkage structure enable the operating handle and the switch handle to form a linkage cooperation.

[0005] The advantages of the above technical solution are as follows: the swing fulcrum on the mounting component passes through the linkage component, thus the mounting component effectively installs the linkage component and limits its operation. Furthermore, the two ends of the linkage component are respectively designated as the first linkage part and the second linkage part. A first linkage structure is set between the rotating shaft and the first linkage part, and a second linkage structure is set between the second linkage part and the operating handle. When the switch handle drives the rotating shaft to rotate, the linkage component swings under the action of the first linkage structure and the swing fulcrum. The second linkage part drives the operating handle through the second linkage structure, thereby opening and closing the internal structure of the circuit breaker body. With this configuration, the miniature circuit breaker inside the explosion-proof box can be controlled without opening the explosion-proof box. The overall structural design is reasonable, and the operation is simple and convenient.

[0006] Furthermore, the guide rail is installed on the rear bottom of the circuit breaker body, the switch handle is installed on the carrier, the first middle part of the mounting component is supported and fixed on the guide rail, the left side part of the mounting component is supported and fixed on the carrier, the right side part of the mounting component is supported by the second middle part of the linkage component, and the swing fulcrum is located on the right side part of the mounting component.

[0007] The advantages of the above technical solution are as follows: the mounting component is supported and fixed to the guide rail through the first middle part and to the carrier through the left side part. Therefore, the mounting component also has the function of reliably fixing the circuit breaker body to the carrier without the need for separate installation with the carrier. At the same time, the mounting component also supports the second middle part of the linkage component through the right side part with the swing fulcrum, making the swing of the linkage component more reliable and the structure is reasonably designed.

[0008] Furthermore, a pair of first supporting feet are provided on the bottom right side of the mounting component. The pair of first supporting feet are arranged on the front and rear sides of the first middle part of the mounting component, and the first supporting feet are supported and fixed on the carrier.

[0009] The advantages of adopting the above technical solution are: the setting of the first support fixing foot makes the support and fixing effect between the mounting part and the circuit breaker body and carrier better, and the structural design is reasonable.

[0010] Furthermore, the first middle part of the mounting component is fixed to the guide rail, the left side part of the mounting component is fixed to the carrier, and the first support fixing foot is fixed to the carrier by screws.

[0011] The advantages of adopting the above technical solution are: the installation of the mounting parts with the carrier and the circuit breaker body is convenient and secure by fixing with screws.

[0012] Furthermore, the first linkage structure includes a first mounting groove and a fixed protrusion. The first mounting groove is formed through the first linkage part, and the fixed protrusion is fixedly installed on the bottom of the rotating shaft. The end of the fixed protrusion is provided with a first insert rod, which cooperates with the first mounting groove.

[0013] The advantages of the above technical solution are: when in use, the fixed protruding shank rotates synchronously with the rotating shaft. Under the constraint of the swing fulcrum, the first insert rod can drive the linkage to swing by cooperating with the first mounting groove. The structural design is simple and reasonable, and it is also easy to install.

[0014] Furthermore, the second linkage structure includes a second mounting groove and an operating handle sleeve. The second mounting groove is formed through the second linkage part, and the operating handle sleeve is inserted into the operating handle. The operating handle sleeve is also provided with a second insert rod, which cooperates with the second mounting groove.

[0015] The advantages of the above technical solution are as follows: After the first linkage part swings under the action of the first linkage structure and the swing fulcrum, the second linkage part can drive the operating handle to operate under the cooperation of the second plug rod and the second mounting groove. The structure design is simple and reasonable and easy to install. At the same time, by adopting the method of using the operating handle sleeve with the second plug rod and the operating handle to snap together, by setting the operating handle sleeve of the corresponding specification, it can adapt to and cooperate with various small circuit breakers of different specifications.

[0016] Furthermore, both the mounting component and the linkage component are integrally formed structures.

[0017] The advantages of adopting the above technical solution are: the mounting parts are made of one piece, which can improve the connection strength between the mounting parts and the circuit breaker body and carrier, and avoid the problem of connection deformation; the linkage parts are made of one piece, which can improve the linkage stability between the linkage parts and the switch handle and the operating handle. The overall performance is good, and the number of parts is reduced, making installation more convenient. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0020] Figure 3 This is a schematic diagram of the mating structure of the button, rotating shaft, and fixed protrusion of this utility model;

[0021] Figure 4 This is a schematic diagram of the mounting component structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the linkage structure of this utility model;

[0023] Figure 6 This is a schematic diagram of the operating handle sleeve structure of this utility model.

[0024] In the diagram: 1-Circuit breaker body, 2-Operating handle, 3-Switch handle, 4-Rotating shaft, 5-Mounting component, 6-Linkage component, 7-Swing fulcrum, 8-First linkage part, 9-Second linkage part, 10-Guide rail, 11-Carrier, 12-First middle part, 13-Left side part, 14-Right side part, 15-Second middle part, 16-First support fixing foot, 17-First mounting groove, 18-Fixing protrusion, 19-First insertion rod, 20-Second mounting groove, 21-Operating handle sleeve, 22-Second insertion rod, 23-Second support fixing foot. Detailed Implementation

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model and / or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without creative effort. Furthermore, references to orientation only indicate the relative positional relationship between the components, not their absolute positional relationship.

[0026] Please see Figures 1 to 6As shown, a miniature circuit breaker operating mechanism inside an explosion-proof box is used to drive the operating handle 2 to open and close the internal structure of the circuit breaker body 1. It includes a switch handle 3 with a rotating shaft 4, a mounting component 5, and a linkage 6. The mounting component 5 is located between the switch handle 3 and the rear side of the circuit breaker body 1. The mounting component 5 also has a swing fulcrum 7, the axis of which is perpendicular to the axis of the rotating shaft 4. The linkage 6 is mounted on the swing fulcrum 7 on the outer side of the mounting component 5. The swing fulcrum 7 on the mounting component 5 passes through the linkage 6, thus the mounting component 5 effectively installs the linkage 6 and defines its operating mode. The linkage 6 includes a first linkage part 8 and a second linkage part 9 arranged at both ends. More specifically, the first linkage part 8 and the second linkage part 9 are arranged in the same direction parallel to the axis of the swing fulcrum 7. The first linkage part 8 cooperates with the rotating shaft 4, and a first linkage is provided between them. The linkage structure includes a second linkage part 9 that cooperates with the operating handle 2, and a second linkage structure between them. The first linkage structure and the second linkage structure enable the operating handle 2 and the switch handle 3 to form a linkage. In the above structure, the two ends of the linkage member 6 are respectively set as the first linkage part 8 and the second linkage part 9. By setting the first linkage structure between the rotating shaft 4 and the first linkage part 8, and setting the second linkage structure between the second linkage part 9 and the operating handle 2, when the switch handle 3 drives the rotating shaft 4 to rotate, the linkage member 6 swings under the action of the first linkage structure and the swing fulcrum 7. The second linkage part 9 drives the operating handle 2 to move through the second linkage structure, thereby opening and closing the internal structure of the circuit breaker body 1. With the above configuration, the miniature circuit breaker inside the explosion-proof box can be controlled without opening the explosion-proof box. The overall structure design is reasonable and the operation is simple and convenient.

[0027] In this embodiment, the guide rail 10 is installed on the rear bottom of the circuit breaker body 1, the switch handle 3 is installed on the carrier 11, the first middle part 12 of the mounting member 5 is supported and fixed on the guide rail 10, the left side part 13 of the mounting member 5 is supported and fixed on the carrier 11, the right side part 14 of the mounting member 5 is supported by the second middle part 15 of the linkage member 6, and the swing fulcrum 7 is located on the right side part 14 of the mounting member 5. The mounting member 5 is supported and fixed to the guide rail 10 through the first middle part 12 and to the carrier 11 through the left side part 13. Therefore, the mounting member 5 also has the function of reliably fixing the circuit breaker body 1 to the carrier 11 without separate installation with the carrier 11. At the same time, the mounting member 5 also supports the second middle part 15 of the linkage member 6 through the right side part 14 with the swing fulcrum 7, making the swing of the linkage member 6 more reliable and the structure is reasonably designed.

[0028] In this embodiment, a pair of first supporting feet 16 are also provided on the bottom surface of the right side portion 14 of the mounting component 5. The pair of first supporting feet 16 are arranged opposite to the front and rear sides of the first linkage portion 8, and the first supporting feet 16 are supported and fixed on the carrier 11. The arrangement of the first supporting feet 16 will form a stable structure with the left side portion 13 of the mounting component 5, which is supported on the carrier 11 from left to right. This makes the support and fixation effect of the mounting component 5 between the circuit breaker body 1 and the carrier 11 better, and the structural design is reasonable. In addition, the use of the first supporting feet 16 also avoids interference with the swing of the first linkage portion 8 of the linkage component 6.

[0029] In this embodiment, the first middle part 12 of the mounting component 5 is fixed to the guide rail 10, the left side part 13 of the mounting component 5 is fixed to the carrier 11, and the first support fixing foot 16 is fixed to the carrier 11 by screws. By fixing with screws, the installation of the mounting component 5 with the carrier 11 and the circuit breaker body 1 is convenient and firm.

[0030] In this embodiment, the first middle part 12 of the mounting member 5 is a flat structure, and multiple screw holes can be provided on the flat first middle part 12. The left side part 13 of the mounting member 5 is an L-shaped structure, and the front and rear sides of the lateral end of the L-shaped left side part 13 form second support fixing feet 23. Screw holes are provided on the second support fixing feet 23. The first support fixing foot 16 is also an L-shaped structure, and screw holes are also provided on the first support fixing foot 16.

[0031] In this embodiment, the first linkage structure includes a first mounting groove 17 and a fixed protrusion 18. The first mounting groove 17 is formed through the first linkage part 8. The first mounting groove 17 is a strip-shaped groove and is arranged parallel to the axis of the swing fulcrum 7. The fixed protrusion 18 is fixedly installed on the bottom of the rotating shaft 4. The end of the fixed protrusion 18 is provided with a first insertion rod 19. The first insertion rod 19 is eccentrically arranged with the fixed protrusion 18. The first insertion rod 19 cooperates with the first mounting groove 17. In use, the fixed protrusion 18 rotates synchronously with the rotating shaft 4. Under the restriction of the swing fulcrum 7, the first insertion rod 19 can drive the linkage part 6 to swing by cooperating with the first mounting groove 17. The structure design is simple and reasonable, and it is also easy to install.

[0032] In this embodiment, the second linkage structure includes a second mounting groove 20 and an operating handle sleeve 21. The second mounting groove 20 is formed through the second linkage part 9. The operating handle sleeve 21 is inserted into the operating handle 2. The operating handle 2 is also provided with a second insertion rod 22. The second insertion rod 22 cooperates with the second mounting groove 20. After the first linkage part 8 swings the linkage part 6 under the action of the first linkage structure and the swing fulcrum 7, the second linkage part 9 can drive the operating handle 2 to operate under the cooperation of the second insertion rod 22 and the second mounting groove 20. The structure design is simple and reasonable, and easy to install. At the same time, by using the method of the operating handle sleeve 21 with the second insertion rod 22 to be snapped into the operating handle 2, by setting the operating handle sleeve 21 of the corresponding specifications, it can adapt to and cooperate with various small circuit breakers of different specifications.

[0033] In this embodiment, both the mounting component 5 and the linkage component 6 are integrally molded structures. The mounting component 5 is an integrally molded component, which can improve the connection strength between it and the circuit breaker body 1 and the carrier 11 and avoid the problem of connection deformation. The linkage component 6 is an integrally molded component, which can improve the linkage stability between it and the switch handle 3 and the operating handle 2. The overall performance is good, and the number of parts is reduced, making installation more convenient.

[0034] In this embodiment, the mounting component 5 and the linkage component 6 can be injection-molded plastic parts or bent metal plates.

[0035] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A miniature circuit breaker operating mechanism in an explosion-proof box for driving an operating handle (2) to open and close the internal structure of a circuit breaker main body (1), characterized in that: The switch handle (3) has a rotating shaft (4), a mounting member (5) is arranged between the switch handle (3) and the rear side of the circuit breaker body (1), and a swing supporting point (7) is further arranged on the mounting member (5), the axis of the swing supporting point (7) is perpendicular to the axis of the rotating shaft (4), a linkage member (6) is arranged on the swing supporting point (7) on the outer side of the mounting member (5), the linkage member (6) includes a first linkage part (8) and a second linkage part (9) arranged at two ends, the first linkage part (8) is matched with the rotating shaft (4) and a first linkage structure is arranged therebetween, the second linkage part (9) is matched with the operating handle (2) and a second linkage structure is arranged therebetween, and the first linkage structure and the second linkage structure form linkage matching between the operating handle (2) and the switch handle (3).

2. A small circuit breaker operating mechanism in an explosion-proof box according to claim 1, characterized in that: A guide rail (10) is arranged on the bottom of the rear side of the circuit breaker body (1), the switch handle (3) is arranged on a carrier (11), a first intermediate part (12) of the mounting member (5) is supported and fixed on the guide rail (10), a left side part (13) of the mounting member (5) is supported and fixed on the carrier (11), a right side part (14) of the mounting member (5) is supported with a second intermediate part (15) of the linkage member (6), and the swing supporting point (7) is arranged on the right side part (14) of the mounting member (5).

3. A small circuit breaker operating mechanism in an explosion-proof box according to claim 2, characterized in that: A pair of first supporting and fixing feet (16) are further arranged on the bottom surface of the right side part (14) of the mounting member (5), the first supporting and fixing feet (16) are arranged on the front and rear sides of the first intermediate part (12) of the mounting member (5), and the first supporting and fixing feet (16) are supported and fixed on the carrier (11).

4. A small circuit breaker operating mechanism in an explosion-proof box according to claim 3, characterized in that: The first intermediate part (12) of the mounting member (5) and the guide rail (10), the left side part (13) of the mounting member (5) and the carrier (11), and the first supporting and fixing feet (16) and the carrier (11) are fixed by screws.

5. A small circuit breaker operating mechanism in an explosion-proof box according to claim 1, characterized in that: The first linkage structure includes a first mounting groove (17) and a fixed protruding handle (18), the first mounting groove (17) is formed through the first linkage part (8), the fixed protruding handle (18) is fixedly arranged on the bottom of the rotating shaft (4), the end of the fixed protruding handle (18) is provided with a first inserting rod (19), and the first inserting rod (19) is matched with the first mounting groove (17).

6. A small circuit breaker operating mechanism in an explosion-proof box according to claim 1, characterized in that: The second linkage structure includes a second mounting groove (20) and an operating handle sleeve (21), the second mounting groove (20) is formed through the second linkage part (9), the operating handle sleeve (21) is inserted on the operating handle (2), the operating handle sleeve (21) is further provided with a second inserting rod (22), and the second inserting rod (22) is matched with the second mounting groove (20).

7. A small circuit breaker operating mechanism in an explosion-proof box according to any one of claims 1-6, characterized in that: The mounting member (5) and the linkage member (6) are integrally formed.

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