A transport frame for transformer core welding fittings

Abstract

The present application relates to the technical field of carrier conveying, and particularly relates to a transformer core welding accessory transfer frame, which comprises a main frame, the upper surface of the main frame is provided with a conveyor belt on each side, the upper surfaces of the two conveyor belts are provided with a supporting plate, the upper surface of the supporting plate is fixedly provided with a supporting table through a connecting seat, the upper surface of the supporting table is provided with a circular port, the inner side of the upper end of the connecting seat is provided with an upper cylindrical cavity which is in communication with the circular port, the upper surface of the supporting table is provided with a moving table, the upper surface of the moving table is fixedly provided with a soft pad, the lower surface of the moving table is fixedly provided with a connecting column in the middle, the lower end of the connecting column is fixedly connected with a limiting disc, the limiting disc is slidably inserted into the inner side of the circular port, the present application can automatically correct the core laminations to realize accurate centering, protect the silicon steel sheet insulation, and can also pre-rotate to detect and check the lamination skew and misplacement, and the standardization correction can improve the positioning accuracy.

Description

Technical Field

[0001] This invention relates to the field of tray conveying technology, and in particular to a transfer rack for transformer core welding accessories. Background Technology

[0002] The transformer core includes components such as core columns formed by stacking silicon steel sheets, upper and lower yokes, and clamps. After the core sheets are stacked and locked in place by the fixing columns, they are placed on the transfer frame and transported to the downstream welding station for welding of accessories such as clamps, pull plates, and connecting pressure plates.

[0003] After the iron core laminations are placed on the transfer rack tray, the sides of the laminations are prone to misalignment with the reference edge of the transfer rack. The welding process requires high parallelism and positional accuracy of the iron core placement; misalignment directly affects the uniformity of the weld and the quality of the iron core formation. Currently, the industry relies solely on operators' personal experience for visual judgment and manual fine-tuning of the iron core placement. This lack of standardized benchmarks makes the operation difficult, inefficient, and the accuracy highly dependent on the operator's skill level, easily leading to incomplete correction and repeated rework.

[0004] To align the core to the reference standard, operators often directly drag and push the stacked core laminations to achieve positional correction. The transfer frame plates are mostly made of hard metal, and the forced friction and scraping between the silicon steel sheets at the bottom of the core and the hard plates easily causes scratches on the bottom surface and chipping damage to the edges and corners of the core laminations. Damage to the insulating coating on the silicon steel sheets significantly increases eddy current losses during transformer operation, severely affecting the electrical performance of the finished product and significantly increasing the scrap rate and repair costs. While rubber pads are often added at the bottom for protection, the high friction during dragging makes movement difficult. Therefore, a transfer frame for transformer core welding accessories is proposed. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the prior art by proposing a transformer core welding accessory transfer frame.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a transformer core welding accessory transfer frame, comprising a main frame, conveyor belts respectively arranged on both sides of the upper surface of the main frame, a pallet arranged on the upper surface of the two conveyor belts, a support platform fixedly mounted on the upper surface of the pallet via a connecting seat, a circular opening on the upper surface of the support platform, an upper cylindrical cavity communicating with the circular opening provided on the upper inner side of the connecting seat, a movable platform arranged above the support platform, a soft pad fixedly arranged on the upper surface of the movable platform, and the movable platform... A connecting column is fixedly installed in the middle of the lower surface of the plate. A limiting plate is fixedly connected to the lower end of the connecting column. The limiting plate is slidably inserted into the inner side of the circular opening. An elastic support mechanism supporting the lower surface of the limiting plate is provided on the inner side of the upper cylindrical cavity. A notch is opened in the middle of each edge of the moving platform. Two movable openings are opened above each notch on the edge of the soft pad. A movable piece integrally connected to the soft pad is provided between each two adjacent movable openings. A lifting mechanism is provided on the upper surface of the tray and below each notch.

[0007] Preferably, retainers are fixedly installed on both sides of the lower surface of the pallet, and the retainers are sleeved on the upper surface of the conveyor belt.

[0008] Preferably, a motor is fixedly installed on the inner bottom surface of the main frame, a drive shaft is rotatably installed on the inner side of the main frame, synchronous pulleys are fixedly sleeved at both ends of the drive shaft, the synchronous pulleys are in rolling cooperation with the inner surface of the conveyor belt, and transmission gears are fixedly connected to the outer surface of the drive shaft and the output shaft of the motor, and a transmission chain is sleeved on the outer edges of the two transmission gears.

[0009] Preferably, the elastic support mechanism includes a lower cylindrical cavity formed at the lower end of the inner side of the connecting seat. The upper end of the lower cylindrical cavity is provided with a circular opening, which communicates with the upper cylindrical cavity. A plug is slidably inserted into the inner side of the circular opening. An upper plate and a lower plate are fixedly connected to the upper and lower ends of the plug, respectively. The lower plate slides in fit with the inner wall of the lower cylindrical cavity, and the upper plate slides in fit with the inner wall of the upper cylindrical cavity. A compression spring is fixedly connected to the inner bottom surface of the lower cylindrical cavity, and the upper end of the compression spring is fixedly connected to the lower surface of the lower plate.

[0010] Preferably, the inner top surface of the upper cylindrical cavity has a curved wall.

[0011] Preferably, the lifting mechanism includes sliding openings respectively opened on the edge of the support platform, an adjusting block is inserted into the inner side of the sliding opening through an adjusting mechanism, a lifting cylinder is fixedly arranged on the inner side of the adjusting block, and a contact ball is slidably embedded in the telescopic end of the lifting cylinder.

[0012] Preferably, the adjusting mechanism includes an adjusting rod threaded through the inner side of the adjusting block, a rotating head fixedly connected to one end of the adjusting rod away from the connecting seat, and a fixing plate rotatably connected to the other end of the adjusting rod. The upper and lower ends of the fixing plate are respectively fixedly connected to the lower surface of the support platform and the upper surface of the support plate, and a scale mark is provided on the inner wall of the sliding mouth.

[0013] Preferably, a number of sets of balls are slidably embedded on the upper surface of the support platform, and the number of sets of balls are distributed in a ring array around the circular opening.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention can automatically align the stacked iron core laminations, replacing the traditional manual visual fine-tuning method. It can achieve precise centering and positioning of the stacked iron core laminations, effectively ensuring the parallelism and positional accuracy of the workpiece placement, and performing standardized calibration operations before being transferred to the welding process. 2. This invention uses soft pads and movable pieces to avoid hard friction and impact damage to the iron core laminations during position correction, effectively protecting the integrity of the insulating coating on the silicon steel sheet surface and avoiding the problem of increased eddy current loss caused by insulation damage; 3. Before the calibration operation, the present invention can assist in the rotation detection of the stacked laminations, and can perform pre-detection and pre-calibration of the appearance and placement posture of the iron core stacked laminations. Before being transported to the welding process, it can detect defects such as misalignment of the stacked laminations and skewed edges in advance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a transformer core welding accessory transfer frame according to the present invention; Figure 2 This is a schematic diagram of the tray of a transformer core welding accessory transfer frame according to the present invention; Figure 3 This is a cross-sectional view of the connecting seat of a transformer core welding accessory transfer frame according to the present invention. Figure 4 This invention relates to a transfer frame for transformer core welding accessories. Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram from below the moving platform of a transformer core welding accessory transfer frame according to the present invention. Figure 6 This invention relates to a transfer frame for transformer core welding accessories. Figure 5 Enlarged view at point B in the middle; Figure 7 This is a schematic diagram of the support platform of a transformer core welding accessory transfer frame according to the present invention; Figure 8 This is a schematic diagram of the stacked laminations of the transformer core welding accessory transfer frame according to the present invention. Figure 9 This is a partial sectional view of the core laminations of a transformer core welding accessory transfer frame according to the present invention during placement. Figure 10 This invention relates to a transfer frame for transformer core welding accessories. Figure 9 Enlarged view of point C.

[0016] The components are as follows: 1. Conveyor belt; 2. Pallet; 3. Cage; 4. Support platform; 5. Moving platform; 6. Soft pad; 7. Movable opening; 8. Movable piece; 9. Notch; 10. Connecting column; 11. Limiting plate; 12. Connecting seat; 13. Lower cylindrical cavity; 14. Round through-hole; 15. Upper cylindrical cavity; 16. Curved wall; 17. Circular opening; 18. Insert column; 19. Upper plate; 20. Lower plate; 21. Compression spring; 22. Ball bearing; 23. Slide; 24. Adjusting block; 25. Adjusting rod; 26. Rotating head; 27. Fixed plate; 28. Lifting cylinder; 29. ​​Contact ball; 30. Scale mark; 31. Main frame; 32. Motor; 33. Drive shaft; 34. Synchronous pulley; 35. Transmission chain; 36. Transmission gear. Detailed Implementation

[0017] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0018] like Figure 1 - Figure 10 The transformer core welding accessory transfer frame shown includes a main frame 31. Conveyor belts 1 are respectively installed on both sides of the upper surface of the main frame 31. A pallet 2 is installed on the upper surface of both conveyor belts 1. A support platform 4 is fixedly installed on the upper surface of the pallet 2 via a connecting seat 12. A circular opening 17 is opened on the upper surface of the support platform 4. An upper cylindrical cavity 15 communicating with the circular opening 17 is provided at the upper inner side of the connecting seat 12. A movable platform 5 is installed above the support platform 4. A soft pad 6 is fixedly installed on the upper surface of the movable platform 5, and a soft pad 6 is fixedly installed in the middle of the lower surface of the movable platform 5. A connecting column 10 is provided, with a limiting plate 11 fixedly connected to its lower end. The limiting plate 11 slides into the inner side of the circular opening 17. An elastic support mechanism supporting the lower surface of the limiting plate 11 is provided on the inner side of the upper cylindrical cavity 15. A notch 9 is opened in the middle of each edge of the moving platform 5. Two movable openings 7 are opened above each notch 9 on the edge of the soft pad 6. A movable piece 8 integrally connected to the soft pad 6 is provided between each two adjacent movable openings 7. A lifting mechanism is provided on the upper surface of the support plate 2 and below each notch 9. The soft pad 6 is made of high-temperature resistant nitrile rubber, and the iron core is not easy to slip. The moving platform 5 is made of hard metal plate, which plays a role in rigid support.

[0019] The notch 9 can be reserved with a larger size to prevent the inner wall of the notch 9 from hitting the telescopic end of the lifting cylinder 28 when the lifting cylinder 28 extends, the moving table 5 moves or rotates.

[0020] A retainer 3 is fixedly installed on both sides of the lower surface of the pallet 2. The retainer 3 is sleeved on the upper surface of the conveyor belt 1 to facilitate the pallet 2 to be stably arranged on the conveyor belt 1 for conveying. The end of the conveyor belt 1 is connected to the RGV railcar conveying system. After inspection and calibration, the iron core laminations with regular posture and qualified quality can be automatically transported to the welding station through the conveyor belt 1 to realize the precise docking and assembly of the iron core laminations and various welding accessories.

[0021] A motor 32 is fixedly mounted on the inner bottom surface of the main frame 31. A drive shaft 33 is rotatably mounted on the inner side of the main frame 31. Synchronous pulleys 34 are fixedly sleeved at both ends of the drive shaft 33. The synchronous pulleys 34 roll in contact with the inner surface of the conveyor belt 1. Transmission gears 36 are fixedly connected to the outer surface of the drive shaft 33 and the output shaft of the motor 32, respectively. A transmission chain 35 is sleeved on the outer edge of the two transmission gears 36. When the motor 32 operates, the transmission gears 36 and the transmission chain 35 drive the drive shaft 33 to rotate, which in turn causes the synchronous pulleys 34 at both ends to rotate, synchronously driving the two conveyor belts 1 to move synchronously and smoothly transport the pallet 2.

[0022] The elastic support mechanism includes a lower cylindrical cavity 13 located at the lower end of the inner side of the connecting seat 12. A circular opening 14 is provided at the upper end of the lower cylindrical cavity 13, communicating with the upper cylindrical cavity 15. A pin 18 is slidably inserted into the inner side of the circular opening 14. An upper plate 19 and a lower plate 20 are fixedly connected to the upper and lower ends of the pin 18, respectively. The lower plate 20 slides against the inner wall of the lower cylindrical cavity 13, and the upper plate 19 slides against the inner wall of the upper cylindrical cavity 15. A compression spring 21 is fixedly connected to the inner bottom surface of the lower cylindrical cavity 13, with its upper end fixedly connected to the lower surface of the lower plate 20. After the iron core laminations are placed, their own weight presses down on the moving platform 5, causing the limiting plate 11 to move synchronously downwards, compressing the compression spring 21 to store energy. A curved wall 16 is formed on the inner top surface of the upper cylindrical cavity 15. After the stacked sheets are unloaded, the lower plate 20 is lifted upward under the force of the compression spring 21, and simultaneously pushes the limiting plate 11 through the upper plate 19; the operator can manually adjust to drive the moving table 5 to reset upward, so that the limiting plate 11 is re-embedded into the circular opening 17. With the addition of the curved wall 16, the limiting plate 11 is assisted in sliding into the circular opening 17 by the guiding effect of the curved wall 16, which greatly reduces the difficulty of resetting the moving table 5 and improves the convenience of operation.

[0023] The lifting mechanism includes sliding openings 23 respectively opened on the edge of the support platform 4. An adjusting block 24 is inserted into the inner side of the sliding opening 23 through the adjusting mechanism. A lifting cylinder 28 is fixedly installed on the inner side of the adjusting block 24. A contact ball 29 is slidably embedded in the telescopic end of the lifting cylinder 28. The lifting cylinder 28 is a small balance oil cylinder commonly used in lifting equipment. It has strong load-bearing capacity, stable lifting output, and can output uniform jacking force synchronously to meet the load requirements of overall translation and angle fine adjustment of the iron core laminations.

[0024] The adjustment mechanism includes an adjusting rod 25 threaded through the inner side of the adjusting block 24. A rotating head 26 is fixedly connected to one end of the adjusting rod 25 away from the connecting seat 12, and a fixing plate 27 is rotatably connected to the other end of the adjusting rod 25. The upper and lower ends of the fixing plate 27 are respectively fixedly connected to the lower surface of the support platform 4 and the upper surface of the support plate 2. A scale 30 is provided on the inner wall of the sliding opening 23. The operator uses a wrench to rotate the rotating head 26, causing the adjusting rod 25 to rotate, which in turn causes the adjusting block 24 to slide along the inner side of the sliding opening 23. By observing the scale 30, the adjusting blocks 24 at four positions can be adjusted to reach their predetermined positions, ensuring that during the calibration of the stacked plates, the edge of the stacked plates can be touched, achieving the purpose of pushing.

[0025] Several sets of balls 22 are slidably embedded on the upper surface of the support platform 4, and the balls 22 are arranged in a ring array around the circular opening 17. The ring-arranged balls 22 support the bottom of the moving platform 5, converting the sliding friction between the moving platform 5 and the support platform 4 into rolling friction. The ring layout can provide balanced support for the moving platform 5 from multiple directions, and the force distribution is uniform and not prone to uneven load distribution.

[0026] The operator places the core lamination workpiece stably on the upper surface of the soft pad 6, ensuring that the edges of the core laminations are parallel to the corresponding edges of the soft pad 6. The workpiece's own weight causes the moving table 5 to sink downwards, and the limiting plate 11 moves down synchronously with the moving table 5. The upper plate 19, the insert post 18, and the lower plate 20, which are rigidly connected to the limiting plate 11, move down synchronously, compressing and storing energy in the compression spring 21. After the limiting plate 11 descends and embeds into the upper cylindrical cavity 15, and the connecting post 10 is retracted into the inner cavity of the circular opening 17, the workpiece enters the workpiece inspection station for inspection and correction of the core laminations, ensuring that they are transported intact and in a regular posture to the subsequent welding process.

[0027] Operators can freely rotate and translate the iron core stack to complete alignment calibration and appearance inspection. The bottom of the moving table 5 rolls and fits with the ball bearing 22, which greatly reduces the frictional resistance of movement and ensures that the translation and rotation of the moving table 5 are smooth and without jamming. After adjusting to the point that the sides of the iron core stack are nearly parallel to the corresponding edges of the support plate 2, the four sets of lifting cylinders 28 are driven to lift synchronously. The contact ball 29 passes through the notch 9 and pushes the movable piece 8 upward, so that the movable piece 8 fits tightly against the stacked sides of the iron core stack, forming protection for the edges of the stack and avoiding collision damage during the adjustment and transportation process. Under the synchronous pushing action of the four sets of contact balls 29, the moving table 5 carrying the iron core laminations completes translation and angle fine adjustment, automatically returns to the center area of ​​the support table 4, realizes automatic workpiece alignment and correction, and the iron core laminations after correction can be directly transported to the next process to carry out the welding operation of peripheral supporting components.

[0028] During the aforementioned calibration process, the edges of the iron core laminations are kept as parallel as possible to the edges of the soft pad 6. After the operator's verification and adjustment, the sides of each iron core lamination are nearly parallel to the corresponding edges of the support plate 2. Thus, when the telescopic end of the lifting cylinder 28 extends from the inside of the recess 9 and contacts the ball 29 to support the underside of the laminations, the laminations, along with the soft pad 6 and the moving table 5, can move or rotate together, preventing the recess 9 from colliding with the lifting cylinder 28.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A transformer core welding accessory transfer frame, comprising a main frame (31), wherein conveyor belts (1) are respectively provided on both sides of the upper surface of the main frame (31), characterized in that: The upper surfaces of the two conveyor belts (1) are provided with a pallet (2). A support platform (4) is fixedly installed on the upper surface of the pallet (2) via a connecting seat (12). A circular opening (17) is opened on the upper surface of the support platform (4). An upper cylindrical cavity (15) communicating with the circular opening (17) is provided on the upper inner side of the connecting seat (12). A movable platform (5) is provided above the support platform (4). A soft pad (6) is fixedly provided on the upper surface of the movable platform (5). A connecting column (10) is fixedly provided in the middle of the lower surface of the movable platform (5). The lower end of the connecting column (10) is fixedly connected to... A limiting disk (11) is connected to the inner side of the circular opening (17). An elastic support mechanism supporting the lower surface of the limiting disk (11) is provided on the inner side of the upper cylindrical cavity (15). A notch (9) is opened in the middle of each edge of the moving table (5). Two movable openings (7) are opened above each notch (9) on the edge of the soft pad (6). A movable piece (8) integrally connected with the soft pad (6) is provided between each two adjacent movable openings (7). A lifting mechanism is provided on the upper surface of the tray (2) and below each notch (9). The elastic support mechanism includes a lower cylindrical cavity (13) opened at the lower end of the inner side of the connecting seat (12). The upper end of the lower cylindrical cavity (13) is provided with a round opening (14), which is connected to the upper cylindrical cavity (15). A plug (18) is slidably inserted into the inner side of the round opening (14). The upper and lower ends of the plug (18) are respectively fixedly connected to an upper plate (19) and a lower plate (20). The lower plate (20) is slidably engaged with the inner wall of the lower cylindrical cavity (13). The upper plate (19) is slidably engaged with the inner wall of the upper cylindrical cavity (15). A compression spring (21) is fixedly connected to the inner bottom surface of the lower cylindrical cavity (13). The upper end of the compression spring (21) is fixedly connected to the lower surface of the lower plate (20). The lifting mechanism includes sliding openings (23) respectively opened on the edge of the support platform (4). An adjusting block (24) is inserted into the inner side of the sliding opening (23) through an adjusting mechanism. A lifting cylinder (28) is fixedly installed on the inner side of the adjusting block (24). A contact ball (29) is slidably embedded in the telescopic end of the lifting cylinder (28).

2. The transformer core welding accessory transfer frame according to claim 1, characterized in that: The lower surface of the pallet (2) is fixedly installed with retainers (3) on both sides, and the retainers (3) are sleeved on the upper surface of the conveyor belt (1).

3. The transformer core welding accessory transfer frame according to claim 1, characterized in that: A motor (32) is fixedly installed on the inner bottom surface of the main frame (31). A drive shaft (33) is rotatably installed on the inner side of the main frame (31). Synchronous wheels (34) are fixedly sleeved at both ends of the drive shaft (33). The synchronous wheels (34) roll in cooperation with the inner surface of the conveyor belt (1). Transmission gears (36) are fixedly connected to the outer surface of the drive shaft (33) and the output shaft of the motor (32). A transmission chain (35) is sleeved on the outer side of the two transmission gears (36).

4. The transformer core welding accessory transfer frame according to claim 1, characterized in that: The upper cylindrical cavity (15) has a curved wall (16) on its inner top surface.

5. A transformer core welding accessory transfer frame according to claim 1, characterized in that: The adjusting mechanism includes an adjusting rod (25) threaded through the inner side of the adjusting block (24). One end of the adjusting rod (25) away from the connecting seat (12) is fixedly connected to a rotating head (26). The other end of the adjusting rod (25) is rotatably connected to a fixing plate (27). The upper and lower ends of the fixing plate (27) are respectively fixedly connected to the lower surface of the support platform (4) and the upper surface of the support plate (2). The inner wall of the sliding mouth (23) is provided with a scale mark (30).

6. A transformer core welding accessory transfer frame according to claim 1, characterized in that: The upper surface of the support platform (4) is slidably fitted with several sets of balls (22), and the several sets of balls (22) are arranged in a ring array around the circular opening (17).

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