A bending device for sheet metal parts of electrical boxes

Abstract

This utility model discloses a bending device for sheet metal parts of an electrical box, including a fixed frame with a mounting frame inside. Both the fixed frame and the mounting frame have quick-change devices on one side. Each quick-change device includes an assembly rod, an assembly sleeve, a fitting, an assembly groove, a movable groove, an assembly ball, and a fitting groove. The assembly groove is located on the outside of the assembly rod, the movable groove is located on the side wall of the assembly sleeve, the assembly ball is installed in the movable groove, and the fitting groove is located in the fitting. A limiting mechanism is installed on the outside of the assembly sleeve. The limiting mechanism includes a movable plate, a movable block, an arc spring, an arc groove, a round hole, a round plate, a round rod, a limiting sleeve, a fixed block, a limiting groove, a limiting frame, and a limiting rod. The arc spring is connected to the movable block and the fixed block. The arc groove is located on the movable plate, the round hole is located at one end of the arc groove, the round plate is installed on the round rod, and the limiting groove is located on the outside of the assembly sleeve. This utility model achieves convenient replacement of the bending block and the fitting block while ensuring the stability of the installation structure of the bending block and the fitting block.

Description

Technical Field

[0001] This utility model relates to the field of bending technology for sheet metal parts of electrical boxes, and more specifically, it relates to a bending device for sheet metal parts of electrical boxes. Background Technology

[0002] In the modern manufacturing industry, sheet metal components for electrical boxes are key structural elements of electrical equipment. Their processing precision and quality directly affect the functionality, stability, and aesthetics of the final product. In the manufacturing process of sheet metal components for electrical boxes, the bending process is the core link in forming a three-dimensional structure. However, the bending equipment for sheet metal components for electrical boxes currently on the market has significant technical defects in terms of the ease of replacement of key components and structural stability.

[0003] The primary problem lies in the cumbersome and inefficient replacement of bending components. Current technology typically requires a bending block and a mating block with a bending groove at the top to perform bending operations. This combination provides precise forming support based on different sheet metal thicknesses and bending angle requirements. However, when replacing the bending block and mating block, operators often need to use various specialized tools such as wrenches, Allen wrenches, and specialized positioning tools. The entire replacement process is complex and time-consuming. This cumbersome replacement method not only significantly extends equipment downtime and reduces production efficiency but also greatly increases the labor intensity and technical requirements for operators. Especially in small-batch, multi-variety production environments, frequent changes in bending specifications require constant replacement of bending components. This time-consuming replacement operation severely disrupts the continuity of the production process, leading to a significant decrease in the efficiency of the entire production line. Furthermore, in cases of urgent production tasks or tool shortages, the inability to conveniently replace the bending block and mating block in a timely manner further exacerbates the difficulties in production scheduling, adversely affecting the company's delivery schedule and cost control.

[0004] Secondly, while some equipment achieves convenient replacement of bending blocks and mating blocks through innovative designs, these quick-change mechanisms often suffer from key defects such as simplistic structural design and insufficient structural stability. Under the actual working conditions of sheet metal bending in electrical boxes, bending equipment needs to withstand hydraulic or mechanical pressure, material springback force generated by repeated bending, impact loads from materials of different hardness, and mechanical vibrations caused by long-term operation. In such a harsh working environment, these simple quick-change structures are prone to a series of structural problems such as component displacement. As the usage time increases and the number of bends increases, loosening and displacement gradually intensify, eventually leading to small gaps or misalignments between the bending block and the mating block. This structural instability not only directly affects bending accuracy and consistency, producing quality defects such as bending angle deviation, uneven edges, or surface scratches, but may also cause the bending block or mating block to completely fall off in severe cases, damaging the equipment and workpiece, and potentially posing safety hazards to operators. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the problems existing in the prior art, this utility model provides a bending device for sheet metal parts of electrical boxes to solve the technical problems mentioned in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a bending device for sheet metal parts of an electrical box, including a fixed frame, a mounting frame in the fixed frame, and a quick-change device on one side of both the fixed frame and the mounting frame. The quick-change device includes an assembly rod, an assembly sleeve, a fitting, an assembly groove, a movable groove, an assembly ball, and a fitting groove. The assembly sleeve is detachably installed on the outside of the assembly rod, the fitting is rotatably installed on the outside of the assembly sleeve, the assembly groove is opened on the outside of the assembly rod, the movable groove is opened on the side wall of the assembly sleeve, the assembly ball is rolled in the movable groove, the fitting groove is opened in the fitting in a variable diameter manner, and a limiting mechanism is installed on the outside of the assembly sleeve. The limiting mechanism includes a movable plate, a movable block, and an arc. The assembly includes a spring, an arc-shaped groove, a round hole, a round plate, a round rod, a limiting sleeve, a fixing block, a limiting groove, a limiting frame, and a limiting rod. The movable plate is rotatably mounted on the outside of the assembly sleeve. The movable block is fixedly mounted on one side of the movable plate. The two ends of the arc-shaped spring are respectively connected to the movable block and the fixing block. The arc-shaped groove is formed on the movable plate. The round hole is formed at one end of the arc-shaped groove. The round plate is fixedly mounted on the round rod. The round rod is fixedly connected to one side of the limiting sleeve. The limiting sleeve is slidably mounted on the outside of the assembly sleeve. The fixing block is fixedly mounted on the outside of the assembly sleeve. The limiting groove is formed on the outside of the assembly sleeve. The limiting frame is fixedly mounted on one side of the fitting. The limiting rod is slidably mounted in the limiting frame. One end of the limiting rod is inserted into the limiting groove.

[0009] The present invention is further configured such that a movable frame is provided in the fixed frame, a hydraulic drive component is detachably provided on the inner side of the fixed frame, the other end of the drive component is detachably connected to the movable frame, a guide rod is detachably provided in the fixed frame, and the movable frame is slidably connected to the guide rod. This design enables the entire bending system to have a reliable drive mechanism and a stable guide structure, ensuring the stability and accuracy of movement during the bending process.

[0010] The present invention is further configured such that a mating block is detachably provided on the inner side of the fixed frame, the mounting frame is installed below the movable frame, a mounting plate is detachably provided on one side of the mounting frame, and slots are provided on one side of both the mounting plate and the mounting frame. A bending block is provided above the mating block, and symmetrical locking blocks are provided on both sides of the bending block. The locking blocks fit into the slots. This locking block and slot fitting design realizes bidirectional positioning and fixing of the bending block. Combined with the detachable mounting plate structure, the installation and disassembly of the bending block becomes simple and quick, while ensuring precise alignment and stable support during the bending process.

[0011] The present invention is further configured such that an arc-shaped rod is connected to one side of the movable block, and an arc-shaped hole is opened in the fixed block. One end of the arc-shaped rod slides into the arc-shaped hole. This arc-shaped guide structure ensures that the rotation trajectory of the movable block is precise and controllable, prevents deviation and jamming during the rotation process, and provides a stable working space for the arc-shaped spring, thereby enhancing the smoothness of operation and positioning accuracy of the limiting mechanism.

[0012] The present invention is further configured such that a slider is fixedly provided on the inner side of the limiting sleeve, and a groove is provided on the outer side of the assembled sleeve, and the slider slides in the groove. This slider and groove cooperation design realizes the precise guidance and limiting function of the limiting sleeve, ensuring that the limiting sleeve can only move along the predetermined track without rotation or deviation, which greatly enhances the stability and reliability of the limiting mechanism.

[0013] The present invention is further configured such that a limiting plate is connected to one end of the limiting rod, and a limiting spring is movably sleeved on the outside of the limiting rod. The two ends of the limiting spring are respectively connected to the limiting plate and the assembly sleeve. This elastic return structure enables the limiting rod to automatically return to the locked state.

[0014] The present invention is further configured such that a movable spring is movably sleeved on the outer side of the round rod, one end of the movable spring is connected to the limiting sleeve, and the other end of the movable spring abuts against one side of the movable plate. This bidirectional elastic support design enables the limiting sleeve to automatically reset.

[0015] The present invention is further configured such that the end of the limiting rod and the edge of the inner wall of the limiting groove are both designed with rounded corners. This humanized rounded corner design significantly reduces the contact impact and frictional resistance between the limiting rod and the limiting groove, making the locking and unlocking process smoother.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, this utility model provides a bending device for sheet metal parts of electrical boxes, which has the following beneficial effects:

[0018] 1. The quick-change device, through a clever combination of assembly rods, assembly sleeves, adapters, assembly slots, movable slots, assembly balls, and adapter slots, completely solves the technical problem of cumbersome and inefficient operation when changing bending blocks and mating blocks in traditional electrical box sheet metal bending equipment. The device adopts a detachable installation structure, allowing the assembly sleeve to be flexibly installed on the outside of the assembly rod, while the adapter is rotatably installed on the outside of the assembly sleeve, realizing a rotation unlocking mechanism. The internal assembly ball is rolled in the movable slot, forming a precise fit with the assembly slot. This design allows operators to quickly release and lock the bending block and mating block simply by rotating the adapter and pulling the assembly sleeve, without the need for any external tools. This significantly simplifies the replacement process, making the entire replacement intuitive and convenient. Even in the absence of tools, the operation can be easily completed, significantly reducing equipment downtime, improving production efficiency, and reducing the labor intensity of operators. It is particularly suitable for frequent bending specification switching needs in small-batch, multi-variety production environments, effectively ensuring the continuous and efficient operation of the production line, solving the problem of rapid component replacement in urgent production tasks, and providing strong support for enterprise delivery guarantee and cost control.

[0019] 2. The limiting mechanism consists of a movable plate, movable block, arc spring, arc groove, round hole, round plate, round rod, limiting sleeve, fixed block, limiting groove, limiting frame, and limiting rod. It solves the technical defect of insufficient stability in simple quick-change structures under high-intensity working environments. This mechanism adopts a multi-locking design. The movable block and fixed block are connected by the arc spring, and the sliding cooperation between the arc rod and the arc hole ensures the smooth rotation and precise positioning of the movable plate. This multi-layered, multi-dimensional limiting structure maintains excellent structural stability even under harsh working conditions such as hydraulic pressure, material springback force, impact load, and mechanical vibration. It effectively prevents the bending block and mating block from loosening and shifting during operation, eliminating quality defects such as precision deviation, uneven edges, or surface scratches caused by structural instability. It also avoids equipment damage and safety hazards caused by the detachment of the bending block or mating block, significantly improving bending accuracy and consistency, ensuring operational safety, and meeting the long-term stable high-precision bending processing requirements of electrical box sheet metal components. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a bending device for sheet metal parts of an electrical box according to the present invention;

[0021] Figure 2 This is a schematic diagram of the dispersed structure of the movable frame and bending block in this utility model;

[0022] Figure 3 This is a schematic diagram of the dispersed structure of the quick-change device and the limiting mechanism in this utility model;

[0023] Figure 4This is a cross-sectional structural diagram of the quick-change device and the limiting mechanism in this utility model;

[0024] Figure 5 This is a cross-sectional structural diagram of the assembly sleeve, adapter, and assembly rod in this utility model.

[0025] In the diagram: 1. Fixed frame; 2. Mounting frame; 3. Assembling rod; 4. Assembling sleeve; 5. Adaptor; 6. Assembling slot; 7. Movable slot; 8. Assembling ball; 9. Adaptor slot; 10. Movable plate; 11. Movable block; 12. Arc spring; 13. Arc slot; 14. Round hole; 15. Round plate; 16. Round rod; 17. Restricting sleeve; 18. Fixed block; 19. Restricting slot; 20. Restricting frame; 21. Restricting rod; 22. Movable frame; 23. Hydraulic drive component; 24. Guide rod; 25. Mating block; 26. Mounting plate; 27. Slot; 28. Bending block; 29. ​​Slot; 30. Arc rod; 31. Arc hole; 32. Slider; 33. Slide groove; 34. Restricting plate; 35. Restricting spring; 36. Movable spring. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0028] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0029] Please see Figures 1-5A bending device for sheet metal parts of an electrical box includes a fixed frame 1, a mounting frame 2 in the fixed frame 1, and quick-change devices on one side of both the fixed frame 1 and the mounting frame 2. The quick-change devices include an assembly rod 3, an assembly sleeve 4, an adapter 5, an assembly groove 6, a movable groove 7, an assembly ball 8, and an adapter groove 9. The assembly sleeve 4 is detachably mounted on the outside of the assembly rod 3, the adapter 5 is rotatably mounted on the outside of the assembly sleeve 4, the assembly groove 6 is located on the outside of the assembly rod 3, the movable groove 7 is located on the side wall of the assembly sleeve 4, the assembly ball 8 is rotatably mounted in the movable groove 7, and the adapter groove 9 is a variable-diameter type located in the adapter 5. A limiting mechanism is installed on the outside of the assembly sleeve 4, the limiting mechanism including a movable plate 10, a movable block 11, an arc spring 12, an arc groove 13, a round hole 14, a round plate 15, a round rod 16, and a limiting element. The assembly includes a sleeve 17, a fixing block 18, a limiting groove 19, a limiting frame 20, and a limiting rod 21. A movable plate 10 is rotatably mounted on the outside of the assembly sleeve 4. A movable block 11 is fixedly mounted on one side of the movable plate 10. An arc-shaped spring 12 is connected at both ends to the movable block 11 and the fixing block 18, respectively. An arc-shaped groove 13 is opened on the movable plate 10. A round hole 14 is opened at one end of the arc-shaped groove 13. A round plate 15 is fixedly mounted on a round rod 16. The round rod 16 is fixedly connected to one side of the limiting sleeve 17. The limiting sleeve 17 is slidably mounted on the outside of the assembly sleeve 4. A fixing block 18 is fixedly mounted on the outside of the assembly sleeve 4. A limiting groove 19 is opened on the outside of the assembly sleeve 4. A limiting frame 20 is fixedly mounted on one side of the adapter sleeve 5. A limiting rod 21 is slidably mounted in the limiting frame 20. One end of the limiting rod 21 is inserted into the limiting groove 19.

[0030] The fixed frame 1 is provided with a movable frame 22. The fixed frame 1 is detachably provided with a hydraulic drive component 23. The other end of the drive component is detachably connected to the movable frame 22. The fixed frame 1 is detachably provided with a guide rod 24. The movable frame 22 is slidably connected to the guide rod 24.

[0031] The fixed frame 1 has a detachable mating block 25 on its inner side. The mounting frame 2 is installed below the movable frame 22. The mounting frame 2 has a detachable mounting plate 26 on one side. The mounting plate 26 and the mounting frame 2 both have slots 27 on one side. The mating block 25 has a bending block 28 above it. The bending block 28 has symmetrically arranged locking blocks 29 on both sides. The locking blocks 29 fit into the slots 27.

[0032] In this embodiment, when the device is needed, the sheet metal part, usually a plate, is first placed on the mating block 25. Then, the hydraulic drive 23 is turned on, and the hydraulic drive 23 drives the movable frame 22 to slide down along the guide rod 24. Then, the movable frame 22 drives the bending block 28 to descend through the mounting frame 2 and mounting plate 26, so that the bottom end of the bending block 28 contacts the upper surface of the sheet metal part. Then, it is pressed down to bend the part and the bottom end enters the bending groove opened in the mating block 25. Then, the hydraulic drive 23 is reversed, so that the hydraulic drive 23 drives the movable frame 22 to rise along the guide rod 24, thereby causing the bending block 28 to rise and reset. Then, the hydraulic drive 23 is turned off.

[0033] Please see Figures 3-5 As a further implementation of the overall equipment: an arc-shaped rod 30 is connected to one side of the movable block 11, and an arc-shaped hole 31 is opened in the fixed block 18, with one end of the arc-shaped rod 30 sliding into the arc-shaped hole 31.

[0034] A slider 32 is fixedly provided on the inner side of the limiting sleeve 17, and a groove 33 is provided on the outer side of the assembly sleeve 4, in which the slider 32 slides.

[0035] A limiting plate 34 is connected to one end of the limiting rod 21, and a limiting spring 35 is movably sleeved on the outside of the limiting rod 21. The two ends of the limiting spring 35 are connected to the limiting plate 34 and the assembly sleeve 4, respectively.

[0036] A movable spring 36 is movably sleeved on the outer side of the round rod 16. One end of the movable spring 36 is connected to the limiting sleeve 17, and the other end of the movable spring 36 abuts against one side of the movable plate 10.

[0037] Both the end of the limiting rod 21 and the edge of the inner wall of the limiting groove 19 adopt a rounded corner structure design.

[0038] More specifically, when it is necessary to replace the bending block 28 and the mating block 25, firstly, rotate the movable plate 10 in the forward direction, so that the movable plate 10 drives the circular hole 14 and the arc groove 13 to rotate in the forward direction, and the movable plate 10 will drive the movable block 11 on one side to rotate in the forward direction. Then, the movable block 11 will drive the arc rod 30 on one side to rotate in the forward direction along the arc hole 31, and the movable block 11 and the fixed block 18 cooperate to compress the arc spring 12. When the arc spring 12 is compressed to its limit, the circular hole 14 just rotates to a position concentric with the circular plate 15. Then, push the limiting sleeve 17, and the limiting sleeve 17 will drive the inner slider 32 to slide along the slide groove 33. The limiting sleeve 17 will also drive the circular rod 16 and the circular plate 15 to gradually slide through the circular hole 14. At the same time, the limiting sleeve 17 will cooperate with the movable plate 18 to rotate in the forward direction. Plate 10 compresses the movable spring 36. When the movable spring 36 is compressed to its limit, a circular plate 15 near the limiting sleeve 17 passes through the circular hole 14 and moves to the other side of the movable plate 10. Then the movable plate 10 is released, and the arc spring 12 pushes the movable block 11 to rotate in the opposite direction. This causes the movable block 11 to drive the arc rod 30 to rotate in the opposite direction along the arc hole 31. The movable block 11 will also drive the circular hole 14 and the arc groove 13 to rotate in the opposite direction through the movable plate 10, causing the circular rod 16 to enter the arc groove 13. Then the circular rod 16, together with the circular plate 15 near the limiting sleeve 17, limits the limiting sleeve 17 to one side of the movable plate 10, so that the limiting sleeve 17 no longer limits the outer wall of the limiting plate 34. Then the adapter 5 is rotated in the forward direction, so that the adapter... 5 drives one side of the limiting frame 20 to rotate forward, and then the limiting frame 20 drives the limiting rod 21, the limiting plate 34, and the limiting spring 35 to rotate forward. Then the inner wall of the limiting groove 19 presses against one end of the limiting rod 21. Due to the rounded corner design of the inner wall edge of the limiting groove 19 and one end of the limiting rod 21, one end of the limiting rod 21 disengages from the limiting groove 19, and the other end of the limiting rod 21 is stretched outward by the limiting plate 34 and the limiting spring 35. At the same time, the adapter 5 drives the inner variable diameter adapter groove 9 to rotate forward, so that the wider side of the adapter groove 9 rotates to the position corresponding to the movable groove 7. Then the assembly sleeve 4 is pulled to one side. When it is necessary to disassemble the mating block 25, the assembly rod 3 is pulled to the opposite side. Then the inner wall of the assembly groove 6 presses against the assembly. The outer wall of ball 8 is compressed, causing the assembled ball 8 to roll outward along the movable groove 7. The assembled ball 8 will roll out of the assembly groove 6, and a portion of it will enter the fitting groove 9, allowing the assembly sleeve 4 to be removed. When disassembling the mating block 25, simply remove the assembly rod 3 and then remove the mating block 25 directly. When disassembling the bending block 28, first remove the mounting plate 26 to one side, and then remove the bending block 28 to one side. The bending block 28 and mating block 25 can then be replaced. After replacing the mating block 25 and bending block 28, install the mating block 25 in the corresponding position inside the fixing frame 1, and then allow the locking block 29 on one side of the bending block 28 to engage with the locking groove 27 on one side of the mounting frame 2.Then, the mounting plate 26 is installed onto one side of the bending block 28, so that the assembly rod 3, which is fixedly connected to one side of the mounting frame 2, passes through the reserved mounting hole of the mounting plate 26, and the locking block 29 on the other side of the bending block 28 is engaged into the locking groove 27 opened on one side of the mounting plate 26. Then, the disassembled assembly rod 3 is re-passed through the reserved mounting hole on the mating block 25 and the fixing frame 1. Then, the assembly sleeve 4 is fitted onto the outside of the assembly rod 3 from the other side. Then, the adapter 5 is rotated in the opposite direction. The adapter 5 drives the limiting rod 21, the limiting spring 35, and the limiting plate 34 to rotate in the opposite direction through the limiting frame 20 on one side. At the same time, the adapter 5 will drive the inner adapter groove 9 to rotate in the opposite direction. Then, the inner wall of the adapter groove 9 presses against the outer wall of the assembly ball 8. This causes the assembly ball 8 to roll out of the fitting groove 9, and then the assembly ball 8 will roll inward along the movable groove 7, causing part of the assembly ball 8 to engage in the assembly groove 6 and re-establish the engagement relationship. At this time, the limiting frame 20 just drives the limiting rod 21 and other components to rotate back to the position corresponding to the original limiting groove 19. Then the limiting spring 35 pulls the limiting plate 34 to slide inward, causing the limiting plate 34 to drive the limiting rod 21 to slide inward and reset. Then one end of the limiting rod 21 resets and inserts into the original limiting groove 19. Then the movable plate 10 is rotated forward again, causing the movable plate 10 to drive the round hole 14 and the arc groove 13 to rotate again, and causing the movable plate 10 to drive the movable block 11 to rotate forward again. The movable block 11 rotates, and then the movable block 11 drives the arc-shaped rod 30 on one side to rotate again along the arc-shaped hole 31. Then the movable block 11 and the fixed block 18 cooperate again to press the arc-shaped spring 12. When the circular hole 14 rotates again to the position concentric with the circular plate 15 and the circular rod 16, the movable spring 36 pushes the limiting sleeve 17 to drive the slider 32 to slide and reset along the slide groove 33. Then the limiting sleeve 17 drives the two circular plates 15 to slide and reset through the circular rod 16. When the movable spring 36 is fully reset, the circular plate 15 at the top of the circular rod 16 just moves back to the original side of the movable plate 10. Then the movable plate 10 is released again, and the arc-shaped spring 12 pushes the movable block 11 to rotate and reset. Then the movable block 11 drives the arc-shaped rod 30 along the arc-shaped hole 31. The arc-shaped hole 31 rotates to its reset position, and the movable block 11, through the movable plate 10, drives the circular hole 14 and the arc-shaped groove 13 to rotate to a position that does not correspond to the circular rod 16 and the circular plate 15. Then, the circular rod 16, in conjunction with the top circular plate 15, supports the limiting sleeve 17 to one side of the movable plate 10. The slider 32 and the sliding groove 33 limit the limiting sleeve 17, preventing it from moving. Then, the inner wall of the limiting sleeve 17 again limits the outer wall of the limiting plate 34, preventing the limiting plate 34 and the limiting rod 21 from moving. Finally, the limiting rod 21 and the limiting groove 19 work together to limit the limiting frame 20, preventing the limiting frame 20 and the adapter 5 from rotating, thus preventing accidental unlocking and ensuring the stability of the installation structure.

[0039] In summary, when using or operating the equipment: First, place the sheet metal part (usually a sheet metal plate) on the mating block 25. Then, turn on the hydraulic drive 23. The hydraulic drive 23 drives the movable frame 22 to slide down along the guide rod 24. The movable frame 22 then drives the bending block 28 to descend through the mounting frame 2 and mounting plate 26, so that the bottom end of the bending block 28 contacts the upper surface of the sheet metal part. Then, it is pressed down to bend the part, and the bottom end enters the bending groove in the mating block 25. Then, the hydraulic drive 23 is reversed, causing the hydraulic drive 23 to drive the movable frame 22 to rise along the guide rod 24, thereby causing the bending block 28 to rise and reset. Then, turn off the hydraulic drive 23.

[0040] When the bending block 28 and mating block 25 need to be replaced, first rotate the movable plate 10 in the forward direction, so that the movable plate 10 drives the circular hole 14 and the arc groove 13 to rotate in the forward direction. The movable plate 10 will also drive the movable block 11 on one side to rotate in the forward direction. Then the movable block 11 will drive the arc rod 30 on one side to rotate in the forward direction along the arc hole 31. The movable block 11 and the fixed block 18 cooperate to compress the arc spring 12. When the arc spring 12 is compressed to its limit, the circular hole 14 just rotates to a position concentric with the circular plate 15. Then push the limiting sleeve 17. The limiting sleeve 17 will drive the inner slider 32 to slide along the slide groove 33. The limiting sleeve 17 will also drive the circular rod 16 and the circular plate 15 to gradually slide through the circular hole 14. At the same time, the limiting sleeve 17 and the movable plate 10 will... When the movable spring 36 is compressed to its limit, a circular plate 15 near the limiting sleeve 17 passes through the circular hole 14 and moves to the other side of the movable plate 10. Then the movable plate 10 is released, and the arc spring 12 pushes the movable block 11 to rotate in the opposite direction. This causes the movable block 11 to drive the arc rod 30 to rotate in the opposite direction along the arc hole 31. The movable block 11 will also drive the circular hole 14 and the arc groove 13 to rotate in the opposite direction through the movable plate 10, so that the circular rod 16 enters the arc groove 13. Then the circular rod 16, together with the circular plate 15 near the limiting sleeve 17, limits the limiting sleeve 17 to one side of the movable plate 10, so that the limiting sleeve 17 no longer limits the outer wall of the limiting plate 34. Then the adapter 5 is rotated in the forward direction, so that the adapter 5... When the limiting frame 20 on one side rotates forward, it will drive the limiting rod 21, the limiting plate 34, and the limiting spring 35 to rotate forward. Then, the inner wall of the limiting groove 19 will press against one end of the limiting rod 21. Due to the rounded corner design of the inner wall edge of the limiting groove 19 and one end of the limiting rod 21, one end of the limiting rod 21 will disengage from the limiting groove 19, and the other end of the limiting rod 21 will be stretched outward by the limiting spring 35 driven by the limiting plate 34. At the same time, the adapter 5 will drive the adapter groove 9 with its inner diameter variable opening to rotate forward, so that the wider side of the adapter groove 9 rotates to the position corresponding to the movable groove 7. Then, the assembly sleeve 4 will be pulled to one side. When it is necessary to disassemble the mating block 25, the assembly rod 3 will be pulled to the opposite side. Then, the inner wall of the assembly groove 6 will press against the assembly ball. The outer wall compression causes the assembly ball 8 to roll outward along the movable groove 7, and the assembly ball 8 will roll out of the assembly groove 6. Then, part of the assembly ball 8 will enter the fitting groove 9, and then the assembly sleeve 4 can be removed. When disassembling the mating block 25, simply remove the assembly rod 3 and then remove the mating block 25 directly. When it is necessary to disassemble the bending block 28, first remove the mounting plate 26 to one side, and then remove the bending block 28 to one side. Then the bending block 28 and the mating block 25 can be replaced. After the mating block 25 and the bending block 28 are replaced, install the mating block 25 in the corresponding position inside the fixing frame 1, and then make the locking block 29 on one side of the bending block 28 engage with the locking groove 27 opened on one side of the mounting frame 2.Then, the mounting plate 26 is installed onto one side of the bending block 28, so that the assembly rod 3, which is fixedly connected to one side of the mounting frame 2, passes through the reserved mounting hole of the mounting plate 26, and the locking block 29 on the other side of the bending block 28 is engaged into the locking groove 27 opened on one side of the mounting plate 26. Then, the disassembled assembly rod 3 is re-passed through the reserved mounting hole on the mating block 25 and the fixing frame 1. Then, the assembly sleeve 4 is fitted onto the outside of the assembly rod 3 from the other side. Then, the adapter 5 is rotated in the opposite direction. The adapter 5 drives the limiting rod 21, the limiting spring 35, and the limiting plate 34 to rotate in the opposite direction through the limiting frame 20 on one side. At the same time, the adapter 5 will drive the inner adapter groove 9 to rotate in the opposite direction. Then, the inner wall of the adapter groove 9 presses against the outer wall of the assembly ball 8. This causes the assembly ball 8 to roll out of the fitting groove 9, and then the assembly ball 8 will roll inward along the movable groove 7, causing part of the assembly ball 8 to engage in the assembly groove 6 and re-establish the engagement relationship. At this time, the limiting frame 20 just drives the limiting rod 21 and other components to rotate back to the position corresponding to the original limiting groove 19. Then the limiting spring 35 pulls the limiting plate 34 to slide inward, causing the limiting plate 34 to drive the limiting rod 21 to slide inward and reset. Then one end of the limiting rod 21 resets and inserts into the original limiting groove 19. Then the movable plate 10 is rotated forward again, causing the movable plate 10 to drive the round hole 14 and the arc groove 13 to rotate again, and causing the movable plate 10 to drive the movable block 11 to rotate forward again. The movable block 11 rotates, and then the movable block 11 drives the arc-shaped rod 30 on one side to rotate again along the arc-shaped hole 31. Then the movable block 11 and the fixed block 18 cooperate again to press the arc-shaped spring 12. When the circular hole 14 rotates again to the position concentric with the circular plate 15 and the circular rod 16, the movable spring 36 pushes the limiting sleeve 17 to drive the slider 32 to slide and reset along the slide groove 33. Then the limiting sleeve 17 drives the two circular plates 15 to slide and reset through the circular rod 16. When the movable spring 36 is fully reset, the circular plate 15 at the top of the circular rod 16 just moves back to the original side of the movable plate 10. Then the movable plate 10 is released again, and the arc-shaped spring 12 pushes the movable block 11 to rotate and reset. Then the movable block 11 drives the arc-shaped rod 30 along the arc-shaped hole 31. The arc-shaped hole 31 rotates to its reset position, and the movable block 11, through the movable plate 10, drives the circular hole 14 and the arc-shaped groove 13 to rotate to a position that does not correspond to the circular rod 16 and the circular plate 15. Then, the circular rod 16, in conjunction with the top circular plate 15, supports the limiting sleeve 17 to one side of the movable plate 10. The slider 32 and the sliding groove 33 limit the limiting sleeve 17, preventing it from moving. Then, the inner wall of the limiting sleeve 17 again limits the outer wall of the limiting plate 34, preventing the limiting plate 34 and the limiting rod 21 from moving. Finally, the limiting rod 21 and the limiting groove 19 work together to limit the limiting frame 20, preventing the limiting frame 20 and the adapter 5 from rotating, thus preventing accidental unlocking and ensuring the stability of the installation structure.

[0041] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. An electric box sheet metal part bending device, comprising a fixing frame (1) provided with a mounting frame (2), characterized in that: Both the fixed frame (1) and the mounting frame (2) are equipped with quick-change devices on one side. The quick-change devices include an assembly rod (3), an assembly sleeve (4), an adapter (5), an assembly groove (6), a movable groove (7), an assembly ball (8), and an adapter groove (9). The assembly groove (6) is located on the outside of the assembly rod (3), the movable groove (7) is located on the side wall of the assembly sleeve (4), the assembly ball (8) is installed in the movable groove (7), and the adapter groove (9) is located in the adapter (5) with a variable diameter. A limiting mechanism is installed on the outside of the assembly sleeve (4). The limiting mechanism includes a movable plate (10), a movable block (11), an arc spring (12), an arc groove (13), and a round hole (14). 14) Circular plate (15), circular rod (16), limiting sleeve (17), fixing block (18), limiting groove (19), limiting frame (20) and limiting rod (21), arc spring (12) is connected to movable block (11) and fixing block (18), arc groove (13) is opened on movable plate (10), circular hole (14) is opened at one end of arc groove (13), circular plate (15) is installed on circular rod (16), circular rod (16) is connected to one side of limiting sleeve (17), limiting groove (19) is opened on the outside of assembly sleeve (4), limiting frame (20) is installed on one side of fitting (5), and limiting rod (21) is installed in limiting frame (20).

2. The electrical box sheet metal part bending apparatus of claim 1, wherein: The fixed frame (1) is provided with a movable frame (22). The fixed frame (1) is detachably provided with a hydraulic drive component (23) on its inner side. The other end of the drive component is detachably connected to the movable frame (22). The fixed frame (1) is detachably provided with a guide rod (24). The movable frame (22) and the guide rod (24) are slidably connected.

3. The sheet metal bending equipment for electrical boxes according to claim 2, characterized in that: The fixed frame (1) is detachably provided with a mating block (25) on its inner side. The mounting frame (2) is installed below the movable frame (22). The mounting frame (2) is detachably provided with a mounting plate (26) on one side. The mounting plate (26) and the mounting frame (2) are both provided with a slot (27) on one side. The mating block (25) is provided with a bending block (28). The bending block (28) is provided with symmetrically arranged locking blocks (29) on both sides. The locking blocks (29) fit into the slot (27).

4. A bending device for sheet metal components of an electrical box according to any one of claims 1-3, characterized in that: An arc-shaped rod (30) is connected to one side of the movable block (11), and an arc-shaped hole (31) is opened in the fixed block (18). One end of the arc-shaped rod (30) slides into the arc-shaped hole (31).

5. A bending device for sheet metal components of an electrical box according to claim 4, characterized in that: The inner side of the limiting sleeve (17) is fixedly provided with a slider (32), and the outer side of the assembly sleeve (4) is provided with a groove (33), and the slider (32) slides in the groove (33).

6. The sheet metal bending equipment for electrical boxes according to claim 5, characterized in that: One end of the limiting rod (21) is connected to a limiting plate (34), and a limiting spring (35) is movably sleeved on the outside of the limiting rod (21). The two ends of the limiting spring (35) are respectively connected to the limiting plate (34) and the assembly sleeve (4).

7. A bending device for sheet metal components of an electrical box according to claim 6, characterized in that: A movable spring (36) is movably sleeved on the outside of the round rod (16). One end of the movable spring (36) is connected to the limiting sleeve (17), and the other end of the movable spring (36) abuts against one side of the movable plate (10).

8. A bending device for sheet metal components of an electrical box according to claim 7, characterized in that: The ends of the limiting rod (21) and the edges of the inner wall of the limiting groove (19) are both designed with rounded corners.

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