Operating mechanism mounting structure for explosion-proof box

Abstract

The application relates to an operating mechanism mounting structure of an explosion-proof box, which comprises an explosion-proof box and a plurality of operating mechanisms arranged in the explosion-proof box, a mounting support is arranged in the explosion-proof box in the transverse direction, the explosion-proof box is provided with a longitudinal adjusting structure for adjusting the position of the mounting support in the longitudinal direction, a connecting support is arranged on the mounting support in the transverse direction, a rotary knob is arranged on the connecting support, an operating ring is arranged above the rotary knob, a fixing strip is arranged on each side of the operating ring below the mounting platform, the fixing strip has a dismounting state opposite to a moving groove and a fixing state abutting against the mounting platform when the operating ring rotates, and the mounting platform is provided with a transverse adjusting structure for adjusting the position of the connecting support in the transverse direction. The operating mechanism mounting structure of the explosion-proof box can improve the dismounting and maintenance convenience and accurately adapt to the rotary knob position.

Description

Technical Field

[0001] This invention relates to the field of explosion-proof devices, and more specifically to an operating mechanism installation structure for an explosion-proof box. Background Technology

[0002] Explosion-proof enclosures are a type of explosion-proof equipment used in industrial production processes. They are special enclosures used to house instruments and equipment, protecting equipment from explosions and fires in hazardous environments and preventing internal explosions from igniting surrounding flammable and explosive gases. They ensure safety during production processes and are of great importance in hazardous locations involving explosive, flammable, or explosive dust. To ensure safe operation of electrical components (circuit breakers) within the explosion-proof enclosure, operating mechanisms are often installed inside the enclosure, allowing operation of the components from the outside. This is suitable not only for explosion-proof enclosures but also for applications requiring remote operation of circuit breakers.

[0003] Traditional operating mechanisms include an operating bracket fixed inside the housing, a circuit breaker rail for mounting the circuit breaker, an operating lever hinged to the side of the operating bracket, a transmission arm integrally bent at one end of the operating lever located above the circuit breaker, and a linkage arm integrally bent at the other end located below the circuit breaker. The transmission arm has a transmission groove, and external operating components (knobs, etc.) cause the linkage arm to swing, thereby driving the transmission arm to swing. Since the circuit breaker lever is located in the transmission groove, the circuit breaker is closed or opened when the transmission arm swings.

[0004] However, the above structure has certain drawbacks, mainly in two aspects: ① The transmission arm, operating rod, and operating bracket form a U-shaped cavity for aligning the circuit breaker, and the U-shaped opening of the cavity faces the side of the circuit breaker. Once multiple operating brackets are installed side by side, the U-shaped opening of the cavity will be closed by the adjacent operating brackets, which will cause inconvenience in disassembling and assembling the circuit breaker. Moreover, since the transmission arm is integrated with the operating rod, it cannot be adapted to the circuit breaker when the number of stages or modules (leakage current module, auxiliary module, etc.) are increased or decreased, requiring the replacement of the entire operating bracket, increasing the workload; ② The operating bracket... After the frame and connecting bracket are fixed, they are fixed to the explosion-proof box one by one. Due to the limited space in the explosion-proof box, the installation of the operating bracket requires the use of tools (usually riveting and bolts). When operating the tools, they are not only restricted by the explosion-proof box, but also obstructed by other operating brackets, which greatly reduces the assembly efficiency; ③ Since the operating mechanism and the explosion-proof box are processed at different workstations, processing errors are easy to occur. After the operating bracket is fixed to the explosion-proof box, the knob opening and the knob cannot be accurately aligned, which affects the operation. It is necessary to reprocess or replace the explosion-proof box, which reduces the strength of the explosion-proof box or increases the use cost. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an installation structure for the operating mechanism of an explosion-proof box that improves the convenience of disassembly, assembly and maintenance and accurately adapts to the position of the knob.

[0006] To achieve the above objectives, the present invention provides the following technical solution: It includes an explosion-proof enclosure and multiple operating mechanisms disposed within the explosion-proof enclosure. Each operating mechanism includes an operating bracket and a connecting bracket. The operating bracket is provided with a circuit breaker guide rail for mounting a circuit breaker. An operating rod is hinged to the side of the circuit breaker on the operating bracket. One end of the operating rod is provided with a transmission arm located above the circuit breaker, and the other end is provided with a linkage arm located below the circuit breaker. The connecting bracket is fixed to the operating bracket and forms a swing cavity for the linkage arm to swing. The connecting bracket is provided with a knob opening for a knob to pass through. The invention is characterized in that: a mounting bracket is disposed laterally within the explosion-proof enclosure. The mounting bracket includes a mounting platform located in the middle of the horizontal direction and fixed supports located on both sides of the horizontal direction. The fixed supports include a bent portion bending towards the explosion-proof enclosure and a fixed portion fitting against the explosion-proof enclosure. The explosion-proof box is equipped with a longitudinal adjustment structure for adjusting the position of the mounting bracket. After the fixed part is adjusted longitudinally, it is welded and fixed to the explosion-proof box, forming a cavity between the mounting platform and the explosion-proof box. The mounting platform is used for horizontally arranging connecting brackets. The mounting platform is provided with a moving groove with a width greater than or equal to the diameter of the knob opening. The knob opening is rotated to provide an operating ring that moves in the moving groove. The operating ring is located above the connecting bracket and is provided with a force-applying skirt that is attached to the connecting bracket and extends to the outside of the connecting bracket. The part of the force-applying skirt located on the outside of the bracket serves as the operating part for rotating the operating ring. The operating ring is provided with fixing strips on both sides below the mounting platform. The fixing strips have a disassembled state opposite to the moving groove and a fixed state against the bottom of the mounting platform when the operating ring rotates. The mounting platform is equipped with a lateral adjustment structure for adjusting the position of the connecting bracket.

[0007] By adopting the above technical solution, a novel tool-free operating mechanism installation structure is provided, replacing the traditional method of fixing the connecting bracket to the explosion-proof box using tools (screws, rivets). Before assembly, the mounting bracket and knob are aligned longitudinally and then the fixing part is welded. During assembly, the connecting bracket is placed on the mounting platform of the mounting bracket, the lateral position is adjusted, and the knob opening is aligned with the knob. Then, the force-applying skirt is rotated 90° to rotate the operating ring. At the same time, the fixing strip also rotates synchronously, changing from a disassembled state opposite to the moving slot to a fixed state against the bottom of the mounting platform. This quickly realizes the installation of the operating mechanism. Disassembly is achieved by rotating the force-applying skirt 90° in the opposite direction. No tools are required, avoiding the disadvantage of obstructing operating tools in confined spaces and improving the convenience of disassembly, assembly, and maintenance. At the same time, the longitudinal and lateral adjustment structures work together to allow the knob opening to be finely adjusted with the knob, avoiding the problems of reduced explosion-proof box strength or increased operating costs caused by processing errors. In addition, modularization is a trend. Gradually modularizing the operating mechanism will make the explosion-proof box more versatile in the future, easier to modify, and provide a shortcut for workers to quickly get started.

[0008] The present invention is further configured such that: the lateral moving structure includes a guide groove and a guide block; the guide groove is arranged laterally on the mounting platform and is located on both sides of the longitudinal direction of the moving groove; the guide block is arranged below the connecting bracket and is formed by stamping the connecting bracket; each connecting bracket has four guide blocks, which are located on both sides of the longitudinal direction of the connecting bracket; the guide block is inserted into the guide groove and slides with the guide groove.

[0009] By adopting the above technical solution, the guide block of the connecting bracket slides into the guide grooves on both sides of the longitudinal direction, thereby stably guiding the connecting bracket to move laterally on the installation platform. When the guide block is inserted into the guide groove, the operating ring and the moving groove are automatically and accurately aligned, making the assembly more precise. In addition, the guide block is formed by stamping the connecting bracket, making the structure more concise and compact.

[0010] The present invention is further configured such that: the longitudinal moving structure includes guide recesses located on both sides inside the explosion-proof box and formed by stamping; the length of the mounting bracket is adapted to the spacing between the guide recesses on both sides; and the fixing part is located in the guide recess on the same side and slides along the guide recess.

[0011] By adopting the above technical solution, the guide recess not only has the function of guiding the longitudinal movement of the fixed support leg in the seat, but also has the function of confining the fixed support leg within the explosion-proof box, making the mounting bracket more reliably assembled in the explosion-proof box and easier to weld and fix. In addition, the guide recess is formed by stamping the explosion-proof box, making the structure more concise and compact.

[0012] The present invention is further configured such that: the outer periphery of the force-applying skirt is provided with a plurality of force-applying protrusions and force-applying recesses at intervals.

[0013] By adopting the above technical solution, the spaced force-applying protrusions and indentations make it easier for workers to apply force, making the connection bracket and the installation platform more secure and easier to disassemble.

[0014] The invention is further configured such that: guide ramps are respectively provided on both sides of the end face of the fixing strip facing the installation platform in the width direction, and the height of the guide ramps gradually decreases as they move away from the center of the fixing strip.

[0015] By adopting the above technical solution, the fixing strip has a certain deformation to form a reliable fixing force. Therefore, a guide ramp is added so that when the fixing strip swings horizontally from the disassembled state to the fixed state, it will not interfere with the installation platform. Instead, under the guidance of the guide ramp, it will stably rest against the bottom of the installation platform, ensuring smooth operation.

[0016] The present invention is further configured such that: a compensation groove is provided around the knob opening above the connecting bracket, and a compensation spring is provided in the compensation groove, which is sleeved on the outer periphery of the operating ring and compressed between the compensation groove and the force-applying skirt.

[0017] By adopting the above technical solution, the fixing bar will undergo certain deformation after repeated operation. Therefore, a compensation spring is added to compensate for the gap between the fixing bar and the operating platform, so as to ensure the reliability of the fixing and extend the service life.

[0018] The present invention is further configured such that: the transmission arm and the operating lever are separately arranged; the transmission arm is an L-shaped component, with the two sides of the L-shaped corner being a transmission part located above the circuit breaker and a connecting part overlapping with the operating lever, respectively; the operating lever is provided with an alignment structure for aligning the connecting part with the operating lever and a threaded component for fixing the connecting part.

[0019] By adopting the above technical solution, the transmission arm and operating lever are separated and fixedly connected by threaded parts. On the one hand, after the transmission arm is disassembled, an assembly space is formed above the circuit breaker. Even after the operating bracket is fixed to the housing, the number of stages or modules can still be added or removed, improving the ease of assembly. This serves as a supplement to disassembling the entire operating mechanism for maintenance, making the function more diversified. On the other hand, by replacing the transmission arm with different lengths, it can be adapted to circuit breakers with different stages and modules, thus improving the compatibility range. In addition, an alignment structure is set in the operating lever to quickly and accurately align and fix the operating lever with the transmission arm, ensuring assembly accuracy and making the transmission of the operating lever more precise, avoiding the occurrence of incomplete switching.

[0020] The present invention is further configured such that: the alignment structure includes two alignment blocks located on both sides of the width direction of the operating lever and formed by stamping the operating lever; the end of the connecting part is provided with a narrowing section whose width is adapted to the distance between the two alignment blocks; the connection between the end of the connecting part and the narrowing section forms an alignment step that abuts against the alignment block; the narrowing section and the operating lever are coaxially provided with a disassembly hole fixed by a threaded component.

[0021] By adopting the above technical solution, the two alignment blocks on both sides cooperate with the narrowing section to align the operating rod and the transmission arm in the width direction, and the alignment step formed by the end of the connecting part and the narrowing section cooperates with the alignment block to align the operating rod and the transmission arm in the length direction. The structure is simple and the alignment is quick. At the same time, setting the disassembly hole at the overlapping position of the narrowing section and the operating rod also makes the fixed fit more reliable.

[0022] The present invention is further configured such that: the operating bracket includes an operating base plate for fixing the circuit breaker guide rail, the operating base plate is provided with a through hole for the operating rod to pass through, the end of the operating base plate near the operating rod is bent toward the circuit breaker and provided with a swing plate that fits against the other side of the circuit breaker opposite to the operating rod, and the swing plate is provided with a hinge shaft that forms a hinge engagement with the operating rod.

[0023] By adopting the above technical solution, adding through holes, and attaching the swing plate to the other side of the circuit breaker opposite to the operating rod, the structure of the operating bracket becomes more compact. At the same time, the swing plate also serves as a swing guide for the operating rod, making the swing of the operating rod more stable.

[0024] The present invention is further configured such that: the other end of the operating base plate, which is bent away from the circuit breaker, is provided with a mounting plate; the connecting bracket includes a connecting base plate that is attached to the mounting platform and provided with a knob opening; one end of the connecting base plate is provided with a first connecting plate that is attached to and fixed to the mounting plate; the other end is provided with a second connecting plate that is attached to and fixed to the swing plate; two rows of fixing holes are provided on both sides of the first connecting plate and the second connecting plate, and the two rows of fixing holes on the same side are arranged at intervals; the mounting plate and the swing plate are respectively provided with mating holes corresponding to the fixing holes on each side and each row of fixing holes, which are fixedly engaged with the fixing holes by fixing members.

[0025] By adopting the above technical solution, the first connecting plate and the second connecting plate on both sides of the connecting base plate form a stable swing cavity for the linkage arm to swing, avoiding the linkage arm from being hit by external objects and ensuring the accuracy of linkage with the knob. The connecting bracket and the operating bracket are fixed by the mating hole and the fixing component to one of the rows of fixing holes on the same side, thereby fixing the connecting bracket and the operating bracket. In addition, two rows of fixing holes are arranged at intervals on the same side. Switching between different fixing holes and different mating holes for fixing makes the distance between the connecting bracket and the operating bracket adjustable and more precise, thus improving the compatibility with installation platforms with different spacing. Attached Figure Description

[0026] Figure 1 This is a perspective view of a specific embodiment of the present invention;

[0027] Figure 2 This is a top perspective view of a specific embodiment of the invention without the explosion-proof box.

[0028] Figure 3 A bottom-view perspective view of a specific embodiment of the present invention, excluding the explosion-proof box;

[0029] Figure 4 for Figure 3 Enlarged view of A in the middle;

[0030] Figure 5 A schematic diagram of the operating ring, connecting bracket, and mounting bracket;

[0031] Figure 6 For the three-dimensional operation mechanism Figure 1 ;

[0032] Figure 7 Three-dimensional for operation structure Figure 2 ;

[0033] Figure 8 This is an exploded view of the drive arm;

[0034] Figure 9 for Figure 6 A magnified view of B in the middle. Detailed Implementation

[0035] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] like Figure 1 — Figure 9As shown, this invention discloses an operating mechanism installation structure for an explosion-proof box, including an explosion-proof box 1 and multiple operating mechanisms 2 disposed within the explosion-proof box 1. The explosion-proof box 1 is for illustration only and details such as knobs are not shown. Each operating mechanism 2 includes an operating bracket 21 and a connecting bracket 22. The operating bracket 21 is provided with a circuit breaker guide rail 23 for mounting a circuit breaker. An operating rod 24 is hinged to the side of the circuit breaker on the operating bracket 21. One end of the operating rod 24 is provided with a transmission arm 241 located above the circuit breaker, and the other end is provided with a linkage arm 242 located below the circuit breaker. The connecting bracket 22 is fixed to the operating bracket 21 and forms a swing cavity 25 with the operating bracket 21 for the linkage arm 242 to swing. The connecting bracket 22 is provided with a knob opening 221 for the knob to pass through. An installation bracket 3 is provided horizontally inside the explosion-proof box 1. The installation bracket 3 includes an installation platform 31 located in the middle of the horizontal direction and fixed supports 32 located on both sides of the horizontal direction. The fixed supports 32 include a bent part 321 that bends towards the explosion-proof box 1 and a fixed part 322 that fits against the explosion-proof box 1. The explosion-proof box 1 is provided with a longitudinal adjustment structure for adjusting the position of the installation bracket 3. After the fixed part 322 is adjusted in the longitudinal direction, it is welded and fixed to the explosion-proof box 1, forming a cavity 33 between the installation platform 31 and the explosion-proof box 1. A connecting bracket 22 is arranged horizontally above the installation platform 31. The installation platform 31 is provided with a moving groove 311 with a width greater than or equal to the diameter of the knob opening 221. The knob opening 221 is rotatably provided with an operating ring 34 that moves in the moving groove 311. A force-applying skirt 341 is provided above the connecting bracket 22, fitting against the connecting bracket 22 and extending to the outside of the connecting bracket 22. The portion of the force-applying skirt 341 located on the outside of the bracket serves as the operating part 342 for rotating the operating ring 34. Fixing strips 343 are respectively provided on both sides of the operating ring 34 located below the mounting platform 31. When the operating ring 34 rotates, the fixing strips 343 have a detached state opposite to the moving groove 311 and a fixed state against the bottom of the mounting platform 31. The mounting platform 31 is provided with a lateral adjustment structure for laterally adjusting the position of the connecting bracket 22, providing a novel, tool-free installation structure for the operating mechanism 2, replacing the traditional method of fixing the connecting bracket 22 to the explosion-proof box 1 using tools (screws, rivets). Before assembly, the mounting bracket... After the frame 3 and the knob are aligned longitudinally, the fixing part 322 is welded. During assembly, the connecting bracket 22 is placed on the mounting platform 31 of the mounting bracket 3. The lateral position is adjusted so that the knob opening 221 corresponds to the knob, and the force-applying skirt 341 is rotated 90° to rotate the operating ring 34. At the same time, the fixing strip 343 also rotates synchronously. The fixing strip 343 changes from a disassembled state opposite to the moving groove 311 to a fixed state against the bottom of the mounting platform 31, which quickly realizes the installation of the operating mechanism 2. When disassembling, simply rotate the force-applying skirt 341 90° in the opposite direction. No tools are required, avoiding the disadvantage of obstructing operating tools in a confined space, and improving the convenience of disassembly, assembly and maintenance. At the same time, the longitudinal adjustment structure and the lateral adjustment structure work together to allow the knob opening 221 to be finely adjusted with the knob.This avoids the problems of reduced strength or increased operating costs caused by processing errors in the explosion-proof box 1. Furthermore, modularization, as a trend, allows for the gradual modularization of the operating mechanism 2, making the future functions of the explosion-proof box 1 more diverse and easier to modify, while also providing a shortcut for staff to quickly learn how to use it.

[0038] The lateral movement structure includes a guide groove 312 and a guide block 222. The guide groove 312 is arranged laterally on the mounting platform 31 and is located on both sides of the longitudinal direction of the moving groove 311. The guide block 222 is located below the connecting bracket 22 and is formed by stamping the connecting bracket 22. Each connecting bracket 22 has four guide blocks 222, which are located on both sides of the longitudinal direction of the connecting bracket 22. The guide block 222 is inserted into the guide groove 312 and slides with the guide groove 312. The guide block 222 slides on the guide groove 312 on both sides of the longitudinal direction of the connecting bracket 22, thereby stably guiding the connecting bracket 22 to move laterally on the mounting platform 31. When the guide block 222 is inserted into the guide groove 312, the operating ring 34 and the moving groove 311 are automatically and accurately aligned, making the assembly more precise. In addition, the guide block 222 is formed by stamping the connecting bracket 22, making the structure more concise and compact.

[0039] The longitudinal moving structure includes guide recesses 11 located on both sides inside the explosion-proof box 1 and formed by stamping. The length of the mounting bracket 3 is adapted to the spacing between the guide recesses 11 on both sides. The fixing part 322 is located in the guide recess 11 on the same side and slides along the guide recess 11. In addition to the function of guiding the longitudinal movement of the seat fixing leg 32, the guide recess 11 also has the function of confining the fixing leg 32 within the explosion-proof box 1, so that the mounting bracket 3 can be more reliably assembled into the explosion-proof box 1 and is easier to weld and fix. In addition, the guide recesses 11 are formed by stamping from the explosion-proof box 1, making the structure more concise and compact.

[0040] Multiple force-applying protrusions 3411 and force-applying recesses 3412 are arranged at intervals around the outer periphery of the force-applying skirt 341. The spaced arrangement of the force-applying protrusions 3411 and force-applying recesses 3412 makes it easier for workers to apply force, making the connection bracket 22 and the installation platform 31 more securely fixed and easier to disassemble.

[0041] The end face of the fixing strip 343 facing the mounting platform 31 is provided with guide ramps 3431 on both sides in the width direction. The height of the guide ramps 3431 gradually decreases as they move away from the center of the fixing strip 343. The fixing strip 343 has a certain deformation to form a reliable fixing force. Therefore, the guide ramps 3431 are added so that when the fixing strip 343 swings horizontally from the disassembled state to the fixed state, it will not interfere with the mounting platform 31. Instead, it will be stably pressed against the bottom of the mounting platform 31 under the guidance of the guide ramps 3431, ensuring smooth operation.

[0042] A compensation groove 223 is provided around the knob opening 221 above the connecting bracket 22. A compensation spring 2231 is provided inside the compensation groove 223, which is sleeved on the outer circumference of the operating ring 34 and compressed between the compensation groove 223 and the force-applying skirt 341. After repeated operation, the fixing strip 343 will have a certain deformation. Therefore, the compensation spring 2231 is added to compensate for the gap between the fixing strip 343 and the operating platform, so as to ensure the reliability of the fixation and extend the service life.

[0043] The transmission arm 241 and the operating lever 24 are separate components. The transmission arm 241 is an L-shaped component, with a transmission part 2411 located above the circuit breaker and a connecting part 2412 overlapping with the operating lever 24 on both sides of the L-shaped corner. A transmission groove 2416, which is linked to the circuit breaker's lever, is located on the transmission part 2411. The operating lever 24 is provided with an alignment structure for aligning the connecting part 2412 with the operating lever 24 and a threaded part 2413 for fixing the connecting part 2412. The threaded part 2413 is preferably a screw. The transmission arm 241 and the operating lever 24 are separated and detachably fixed together by the threaded part 2413. On the one hand, the transmission... After the arm 241 is disassembled, an assembly space is formed above the circuit breaker. Even after the operating bracket 21 is fixed to the housing, the number of stages or modules can still be added or removed, improving the ease of assembly. As a supplement to disassembling the entire operating mechanism 2 for maintenance, it makes the function more diversified. On the other hand, by replacing the transmission arm 241 with different lengths, it can be adapted to circuit breakers with different stages and modules, thus improving the compatibility range. In addition, an alignment structure is set on the operating rod 24, which can quickly and accurately align the operating rod 24 with the transmission arm 241 and then fix it, ensuring assembly accuracy and making the transmission of the operating rod 24 more precise, avoiding the occurrence of incomplete switching.

[0044] The alignment structure includes two alignment blocks 243 located on both sides of the operating lever 24 in the width direction and formed by stamping the operating lever 24. The end of the connecting part 2412 is provided with a narrowing section 2413 whose width matches the distance between the two alignment blocks 243. An alignment step 2414 is formed at the connection between the end of the connecting part 2412 and the narrowing section 2413, abutting against the alignment blocks 243. The narrowing section 2413 and the operating lever 24 are coaxially provided with a disassembly hole 2415 fixed by a threaded component 2413. The two alignment blocks 243 on both sides cooperate with the narrowing section 2413 to align the operating rod 24 and the transmission arm 241 in the width direction. The alignment step 2414 formed by the end of the connecting part 2412 and the narrowing section 2413 cooperates with the alignment block 243 to align the operating rod 24 and the transmission arm 241 in the length direction. The structure is simple and the alignment is quick. At the same time, the disassembly hole 2415 is set at the overlapping position of the narrowing section 2413 and the operating rod 24, which also makes the fixed fit more reliable.

[0045] The operating bracket 21 includes an operating base plate 211 for fixing the circuit breaker guide rail 23. The operating base plate 211 is provided with a through hole 212 for the operating lever 24 to pass through. The end of the operating base plate 211 near the operating lever 24 is bent towards the circuit breaker and is provided with a swing plate 213 that is attached to the other side of the circuit breaker opposite to the operating lever 24. The swing plate 213 is provided with a hinge shaft 214 that forms a hinge engagement with the operating lever 24. The addition of the through hole 212 and the attachment of the swing plate 213 to the other side of the circuit breaker opposite to the operating lever 24 make the structure of the operating bracket 21 more compact. At the same time, the swing plate 213 also serves as a swing guide for the operating lever 24, making the swing of the operating lever 24 more stable.

[0046] The operating base plate 211 is bent away from the circuit breaker at the other end relative to the swing plate 213 and has a mounting plate 215. The connecting bracket 22 includes a connecting base plate 224 that is attached to the mounting platform 31 and has a knob opening 221. One end of the connecting base plate 224 has a first connecting plate 225 that is attached to and fixed to the mounting plate 215, and the other end has a second connecting plate 226 that is attached to and fixed to the swing plate 213. Two rows of fixing holes 2251 are respectively provided on both sides of the first connecting plate 225 and the second connecting plate 226. The two rows of fixing holes 2251 on the same side are arranged at intervals. The mounting plate 215 and the swing plate 213 are respectively provided with fittings that are fixedly engaged with the fixing holes 2251 by fasteners. The mating hole 2151, and the fastener is generally a screw or bolt, connects the first connecting plate 225 and the second connecting plate 226 on both sides of the connecting base plate 224 to form a stable swing cavity for the linkage arm 242 to swing, preventing the linkage arm 242 from being hit by external objects and ensuring the accuracy of linkage with the knob. The mating hole 2151 is fixed to one of the rows of fixing holes 2251 on the same side by the fastener, thereby fixing the connecting bracket 22 and the operating bracket 21. In addition, two rows of fixing holes 2251 are arranged at intervals on the same side. Switching between different fixing holes 2251 and different mating holes 2151 for fixing makes the distance between the connecting bracket 22 and the operating bracket 21 adjustable and more precise, thus improving the adaptability to the mounting platform 31 with different spacing.

[0047] Cooperate Figure 9 The first connecting plate 225 and the mounting plate 215 are explained below. The first connecting plate 225 has two rows of fixing holes 2251 on one side, namely row a and row b. The mounting plate 215 has mating holes 2151, including hole c corresponding to row a and hole d corresponding to row b. The first connecting plate 225 and the mounting plate 215 are fixed by a fastener passing through one of the holes and hole c in row a or through one of the holes and hole d in row b. By switching the corresponding holes in row a and hole c or row b and hole d, the distance between the connecting bracket 22 and the operating bracket 21 can be adjusted.

Claims

1. An operating mechanism installation structure for an explosion-proof box, comprising an explosion-proof box and multiple operating mechanisms disposed within the explosion-proof box, each operating mechanism comprising an operating bracket and a connecting bracket, the operating bracket being provided with a circuit breaker guide rail for mounting a circuit breaker, the operating bracket being hinged to an operating rod on the side of the circuit breaker, one end of the operating rod being provided with a transmission arm located above the circuit breaker, and the other end being provided with a linkage arm located below the circuit breaker, the connecting bracket being fixed to the operating bracket and forming a swing cavity with the operating bracket for the linkage arm to swing, the connecting bracket being provided with a knob opening for a knob to pass through, characterized in that: The explosion-proof enclosure is equipped with a mounting bracket arranged horizontally inside. The mounting bracket includes a mounting platform located in the middle of the horizontal direction and fixed legs located on both sides of the horizontal direction. The fixed legs include a bent part that bends towards the explosion-proof enclosure and a fixed part that fits into the explosion-proof enclosure. The explosion-proof enclosure is equipped with a longitudinal adjustment structure for adjusting the position of the mounting bracket. After the fixed part is adjusted in the longitudinal direction, it is welded and fixed to the explosion-proof enclosure, forming a cavity between the mounting platform and the explosion-proof enclosure. The mounting platform is used for horizontally arranging connecting brackets. The mounting platform is provided with a moving groove with a width greater than or equal to the diameter of the knob opening along the horizontal direction. The knob opening is rotated to provide an operating ring that moves in the moving groove. The operating ring is located above the connecting bracket and is provided with a force-applying skirt that fits into the connecting bracket and extends to the outside of the connecting bracket. The part of the force-applying skirt located on the outside of the bracket serves as the operating part for rotating the operating ring. The operating ring is provided with fixing strips on both sides below the mounting platform. The fixing strips have a disassembled state opposite to the moving groove and a fixed state against the bottom of the mounting platform when the operating ring rotates. The mounting platform is equipped with a horizontal adjustment structure for adjusting the position of the connecting brackets.

2. The operating mechanism installation structure of the explosion-proof box according to claim 1, characterized in that: The lateral adjustment structure includes a guide groove and guide blocks. The guide groove is arranged laterally on the installation platform and located on both sides of the longitudinal direction of the moving groove. The guide blocks are arranged below the connecting bracket and are formed by stamping the connecting bracket. Each connecting bracket has four guide blocks, which are located on both sides of the longitudinal direction of the connecting bracket. The guide blocks are inserted into the guide groove and slide in cooperation with the guide groove.

3. The operating mechanism installation structure of the explosion-proof box according to claim 1, characterized in that: The longitudinal adjustment structure includes guide recesses located on both sides inside the explosion-proof box and formed by stamping. The length of the mounting bracket is adapted to the spacing between the guide recesses on both sides. The fixing part is located in the guide recess on the same side and slides along the guide recess.

4. The operating mechanism installation structure of the explosion-proof box according to claim 1, characterized in that: The outer periphery of the force-applying skirt is provided with a plurality of force-applying protrusions and force-applying recesses spaced apart in sequence.

5. The operating mechanism installation structure of the explosion-proof box according to claim 1, characterized in that: The end face of the fixing strip facing the installation platform is provided with guide ramps on both sides in the width direction, and the height of the guide ramps gradually decreases as they move away from the center of the fixing strip.

6. The operating mechanism installation structure of the explosion-proof box according to claim 5, characterized in that: The connecting bracket has a compensation groove around the knob opening above it, and a compensation spring is provided in the compensation groove, which is sleeved on the outer circumference of the operating ring and compressed between the compensation groove and the force-applying skirt.

7. The operating mechanism installation structure of the explosion-proof box according to claim 1, characterized in that: The transmission arm and the operating lever are separate components. The transmission arm is an L-shaped component, with the transmission part located above the circuit breaker and the connecting part overlapping with the operating lever on both sides of the L-shaped corner. The operating lever is provided with an alignment structure for aligning the connecting part with the operating lever and a threaded part for fixing the connecting part.

8. The installation structure of the operating mechanism of the explosion-proof box according to claim 7, characterized in that: The alignment structure includes two alignment blocks located on both sides of the operating lever in the width direction and formed by stamping the operating lever. The end of the connecting part is provided with a narrowing section whose width is adapted to the distance between the two alignment blocks. The connection between the end of the connecting part and the narrowing section forms an alignment step that abuts against the alignment block. The narrowing section and the operating lever are coaxially provided with a disassembly hole fixed by a threaded component.

9. The operating mechanism installation structure of the explosion-proof box according to claim 7, characterized in that: The operating bracket includes an operating base plate for fixing the circuit breaker guide rail. The operating base plate is provided with a through hole for the operating rod to pass through. The end of the operating base plate near the operating rod is bent toward the circuit breaker and is provided with a swing plate that fits against the other side of the circuit breaker opposite to the operating rod. The swing plate is provided with a hinge shaft that forms a hinge engagement with the operating rod.

10. The operating mechanism installation structure of the explosion-proof box according to claim 9, characterized in that: The operating base plate has a mounting plate bent away from the circuit breaker at the other end relative to the swing plate. The connecting bracket includes a connecting base plate that is attached to the mounting platform and has a knob opening. One end of the connecting base plate has a first connecting plate that is attached to and fixed to the mounting plate, and the other end has a second connecting plate that is attached to and fixed to the swing plate. The first and second connecting plates have two rows of fixing holes on their respective sides. The two rows of fixing holes on the same side are arranged at intervals. The mounting plate and the swing plate are respectively provided with mating holes that are fixedly engaged with the fixing holes by fasteners.

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