Iron core upper yoke plate back insertion method

Abstract

The application discloses a method for back inserting upper yoke iron sheets on an iron core. The method utilizes a device comprising a rack, an edge column abutting mechanism, a clamping mechanism, a lifting mechanism, a downward pressing limiting structure, an edge pushing mechanism and an iron sheet inserting mechanism. The distance between the bearing plates is adjusted and positioned, the width adjusting motor drives the width adjusting bottom plate to abut against the edge column, and the sleeve shaft rotates under the constraint of the pull wire to drive the longitudinal clamping plate to clamp the edge column. After the whole upper yoke iron group with the coil is lifted, it falls back to the prepared back inserting position. Then the edge pushing mechanism is used to expand the distance between the end portions of the upper yoke iron sheets to realize staggered alignment. Finally, the downward pressing and the metal plate sliding are used to make the flexible belt sink to give way, and the staggered back insertion is completed. The application realizes the whole lifting, automatic edge pushing and flexible giving way back insertion of the upper yoke iron sheets, is suitable for different specifications and thin laminated core, improves the operation efficiency and reduces the labor intensity.

Description

Technical Field

[0001] This invention belongs to the field of transformer core assembly technology, specifically relating to a method for re-inserting yoke plates on the core. Background Technology

[0002] The core of a transformer and reactor typically consists of side posts, intermediate posts, and upper and lower yokes. The upper yoke is staggered with the side posts and intermediate posts to form a complete magnetic circuit. During the coil assembly process, the upper yoke must first be lifted or removed to allow the coil to be mounted on the side posts and intermediate posts. After the coil assembly is complete, the upper yoke must be staggered back into the top slots of the side posts and intermediate posts.

[0003] Currently, the re-insertion of the upper yoke iron sheets is still mainly done manually, which is labor-intensive, inefficient, and easily damages the insulation layer on the surface of the silicon steel sheets. Among the existing mechanized equipment, the "take one sheet, insert one sheet" mode has too long an auxiliary time and low efficiency; although the "overall re-insertion of the upper yoke iron assembly" mode can reduce the number of times the material is taken out, it is difficult to achieve precise staggered alignment between the end of a single iron sheet and the slot at the top of the column when the iron core laminations are thin and the slots are dense, which can easily lead to slot misalignment, or even deformation or jamming of the iron sheet. Summary of the Invention

[0004] In view of the above, the present invention provides a method for re-inserting the yoke iron sheet on the iron core, which solves the problems of low re-insertion efficiency of the yoke iron sheet after coil assembly, misalignment of the slot of the thin stacked iron core, and easy deformation or jamming of the iron sheet during the re-insertion process, and reduces the labor intensity of manual re-insertion.

[0005] The technical solution of the present invention is as follows: A method for re-inserting the upper yoke plate of an iron core utilizes a re-insertion device comprising a frame, a side column clamping mechanism, a clamping mechanism, a lifting mechanism, a downward pressure limiting structure, an edge-pulling mechanism, and an insertion mechanism. The method includes: adjusting the distance between the two load-bearing plates according to the center distance between the columns; moving the device to engage with the iron core so that the upper yoke plate assembly is positioned between the load-bearing plate and the upper pressure plate; driving the side column clamping mechanism to move laterally and abut against the side column; the clamping mechanism moving in tandem with the side column abutting or acting after the side column abuts to clamp the side column longitudinally; driving the lifting mechanism to raise the upper yoke plate assembly as a whole, so that the bottom surface of the upper yoke plate is higher than the top of the side column and the middle column; releasing the clamping and laterally sliding the device or the iron core to install the coil; after the coil is installed, resetting and re-clamping. The lifting mechanism lowers the edge column, causing the upper yoke assembly to return to the pre-insertion position. The edge-shifting mechanism is activated, and the longitudinal pressure shaft feeds laterally, driving the shifting plates to move longitudinally synchronously. The shifting plates insert into the gap between the ends of adjacent upper yoke plates and widen the end spacing to be greater than the thickness of a single upper yoke plate, achieving staggered alignment of the ends of each upper yoke plate with the slot at the top of the column below. The longitudinal pressure shaft continues to feed laterally, and the lower pressure band presses down the upper yoke plates. At the same time, the metal plate slides longitudinally to create a clearance area. After losing support, the flexible band deforms downwards, completing the staggered reinsertion of the upper yoke plates.

[0006] Furthermore, when the upper yoke assembly falls back to the pre-insertion position, the end of the upper yoke plate is on the same horizontal plane as the top of the side post and the middle post, or has a slight gap and has not yet intersected. The device may also include an end face clamping structure, which uses the longitudinal feed force of the upper yoke assembly to push the rear stop rod, which drives the front stop rod to swing via the swing rod and telescopic shaft, so that the rear stop rod and the front stop rod clamp the longitudinal end faces of the upper yoke assembly. The clamping mechanism may include a sleeve shaft, a pull wire, and a return cylinder. The first shaft section of the sleeve shaft is set as a two-way lead screw, and the second shaft section is provided with a wire groove and wound with a pull wire. When the side post abuts against the feed, the sleeve shaft moves with the width adjustment base plate and is constrained by the pull wire to rotate, driving the longitudinal clamping plates to clamp the side post in opposite directions. The return cylinder compensates for the travel difference between the lateral width adjustment stroke and the longitudinal clamping stroke. The rotary spring on the sleeve shaft can realize the winding of the pull wire and the release of the clamp during the reset. The two load-bearing plates can be driven to move towards or away from each other by the spacing adjustment rod; the lower pressure limiting structure can be an elastic floating structure, so that the upper pressure plate and the load-bearing plate cooperate to keep the top surfaces of each iron piece coplanar. The spacing of the paddles can be adjusted and locked within the locking frame; the metal plate can be driven by the meshing of the helical gear and the helical tooth groove of the motor; the paddle mechanism and the insert mechanism can form a modular actuator, which can be used to replace or adjust the upper yoke iron pieces of different specifications.

[0007] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The positioning clamping, overall lifting, wire clearance, fallback preparation, edge alignment, downward pressing and insertion, and flexible clearance are organized into a continuous process, which significantly improves the efficiency of insertion operation.

[0008] 2. By controlling the timing of “first widening the end gap by adjusting the edge, then pressing down with the same transverse feed, and simultaneously moving the metal plate aside”, the precise staggered alignment of the ends of the thin-layered iron core with the slot at the top of the column is achieved, reducing the risk of slot misalignment, iron sheet deformation and jamming.

[0009] 3. The flexible strip is used to make way for the rigid support surface to replace interference, thus protecting the insulation layer on the surface of the silicon steel sheet. It is suitable for conventional thickness and thin laminated iron cores.

[0010] 4. By adjusting the spacing of the load-bearing plates, elastic clamping, adjusting the spacing of the levers, and replacing the modular mechanism, the compatibility of the same device with iron cores of different specifications can be improved. Attached Figure Description

[0011] Figure 1 This is a perspective view of the iron core upper yoke sheet re-insertion device of the present invention; Figure 2 This is a structural diagram showing the connection between the iron core and the iron core of the present invention, specifically the iron core yoke plate re-insertion device. Figure 3 This is a structural diagram of the frame and side column abutment mechanism and clamping mechanism of the present invention; Figure 4 This is a structural diagram of the lifting platform; Figure 5 for Figure 4 A three-dimensional longitudinal cross-sectional view of the central load-bearing plate; Figure 6 This is a diagram showing the structural connection relationships of the paddle shifter mechanism.

[0012] Figure 7 This is a three-dimensional view of the vertical clamping mechanism.

[0013] The annotations in the attached figures are explained as follows: 1. Frame; 2. Side column clamping mechanism; 21. Width adjustment motor; 22. Width adjustment base plate; 23. Lead screw shaft; 3. Clamping mechanism; 30. Clamping base plate; 31. Longitudinal clamping plate; 32. Sleeve shaft; 321. Wire groove; 322. First shaft section; 323. Second shaft section; 33. Springback cylinder; 34. Pull wire; 4. Lifting mechanism; 41. Lifting drive component; 42. Lifting base plate; 421. Column cylinder; 43. Load-bearing plate; 44. Spacing adjustment rod; 45. Guide column; 5. Downward pressure limiting structure; 51. Floating base plate; 511. Downward pressure arm; 512. Guide column; 514. Vertical elastic structure; 515. Through 52. Upper clamping plate; 6. Edge-trimming mechanism; 61. Edge-trimming drive assembly; 62. Longitudinal pressure shaft; 621. Connecting rod; 63. Front lever; 64. Rear lever; 65. First lever; 66. Second lever; 67. Locking frame; 68. Bending plate; 681. Longitudinal slide groove; 69. Guide double shaft; 601. Optical shaft; 7. Insertion mechanism; 71. Insertion drive assembly; 72. Lower pressure belt; 73. Metal plate; 731. Oblique tooth groove; 74. Flexible belt; 75. Receiving groove; 8. Vertical clamping structure; 81. Rear stop bar; 82. Swing bar; 83. Telescopic shaft; 84. Front stop bar; 85. Anti-rotation block. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0015] like Figures 1-3 As shown, the core yoke re-insertion device used in implementing the method of the present invention is mainly used to re-insert the upper yoke plates back into the top of the side columns and middle columns of the transformer or reactor core after the coils are installed. The device includes a frame 1, a side column clamping mechanism 2, a clamping mechanism 3, a lifting mechanism 4, a downward limiting structure 5, an edge-shifting mechanism 6, and an insertion mechanism 7. The side column clamping mechanism 2, clamping mechanism 3, lifting mechanism 4, downward limiting structure 5, edge-shifting mechanism 6, and insertion mechanism 7 are arranged sequentially along the height direction of the frame 1, and work together to complete the positioning, lifting, repositioning, edge-shifting, and re-insertion of the upper yoke plates.

[0016] The frame 1 serves as the supporting foundation for the entire device and can be a frame structure assembled by welding profiles or bolting. One side of the frame 1 is open to facilitate the movement of the iron core into or out of the frame 1. Preferably, the bottom of the frame 1 is equipped with brake rollers to allow the entire device to slide laterally relative to the iron core, thereby adjusting the working position or making room for the wire.

[0017] The side post clamping mechanism 2 is slidably disposed on both sides of the top of the frame 1, and is used to achieve precise positioning and contact between the device and the iron core in the width direction. The side post clamping mechanism 2 includes a width-adjusting motor 21, two width-adjusting base plates 22, and a lead screw shaft 23. The width-adjusting motor 21 is fixedly mounted on the frame 1, and its output end is connected to the two width-adjusting base plates 22 through the lead screw shaft 23, which can drive the two width-adjusting base plates 22 to move towards or away from each other along the lateral direction of the frame 1. When the device is placed correspondingly to the iron core, the width-adjusting motor 21 is started, driving the width-adjusting base plates 22 on both sides to move towards and contact the side posts on both sides of the iron core, thereby completing the lateral clamping and positioning.

[0018] The two sets of clamping mechanisms 3 are respectively disposed on the two adjustable base plates 22, and are used to clamp the side posts of the iron core in the longitudinal direction to temporarily fix the entire device to the iron core as a whole. Each set of clamping mechanisms 3 includes a clamping base plate 30, two longitudinal clamping plates 31, a sleeve shaft 32, and a spring-loaded cylinder 33.

[0019] The clamping base plate 30 is longitudinally slidably mounted on the width-adjusting base plate 22. Two longitudinal clamping plates 31 are arranged longitudinally at intervals and perpendicular to the clamping base plate 30, with one end of each longitudinal clamping plate 31 extending towards the iron core. The sleeve shaft 32 includes a first shaft section 322 and a second shaft section 323, which are sleeved together and can transmit torque. The first shaft section 322 is configured as a bidirectional lead screw and rotatably mounted on the clamping base plate 30, with the two longitudinal clamping plates 31 respectively screwed into the threaded sections at both ends of the bidirectional lead screw; the second shaft section 323 is rotatably mounted on the width-adjusting base plate 22, and its end away from the first shaft section 322 has a groove 321, in which a pull wire 34 is wound, one end of which is connected to the telescopic end of the spring-loaded cylinder 33 (such as a spring buffer cylinder), and the spring-loaded cylinder 33 is fixed to the frame 1. Preferably, a rotary spring is sleeved on the sleeve shaft 32. The rotary spring is sleeved on the first shaft section 322 or the second shaft section 323. One end of the spring is fixedly connected to the sleeve shaft 32, and the other end is fixedly connected to the clamping base plate 30 or the width adjusting base plate 22. The spring is used to store energy when the width adjusting base plate 22 moves toward the side post and the pull wire 34 is unwound, and to cause the pull wire 34 to automatically rewind under the elastic force of the rotary spring when the width adjusting base plate 22 is reset.

[0020] When the width-adjusting base plate 22 moves towards the side post, the sleeve shaft 32 moves horizontally along with it. Since one end of the pull wire 34 is fixed to the return cylinder 33 on the frame 1, the sleeve shaft 32 rotates under the constraint of the pull wire 34. The first shaft segment 322 rotates accordingly, driving the two longitudinal clamping plates 31 to move towards each other to clamp the two longitudinal ends of the side post. When the pull wire 34 is fully extended but the width-adjusting base plate 22 is not yet in place, the return cylinder 33 extends to release the excess pull wire, preventing the pull wire 34 from breaking. The return cylinder 33 buffers the travel difference between the width-adjusting base plate 22 and the two longitudinal clamping plates 31, thus accommodating cores of different specifications.

[0021] Combination Figures 4 to 6 The lifting mechanism 4 is located at the top of the frame 1 and is used to drive the upper yoke assembly to move vertically. The lifting mechanism 4 includes a lifting drive component 41, a lifting base plate 42, two load-bearing plates 43, a spacing adjustment rod 44, and a guide column 45. The lifting drive component 41 is preferably a hydraulic cylinder, the cylinder body of which is fixed to the frame 1, and its piston rod faces upward and is fixedly connected to the lifting base plate 42. The guide column 45 is provided between the lifting base plate 42 and the frame 1 to improve the stability of the lifting movement.

[0022] Two load-bearing plates 43 are laterally slidable on the lifting base plate 42, with one end of each load-bearing plate 43 extending toward the opening of the frame 1. A spacing adjustment rod 44 is rotatably mounted on the lifting base plate 42 and has a bidirectional thread. The two load-bearing plates 43 are respectively screwed into the bidirectional thread. By rotating the spacing adjustment rod 44, the spacing between the two load-bearing plates 43 can be adjusted so that the center distance between the two load-bearing plates 43 corresponds to the center distance between the side posts and the middle post of the iron core.

[0023] Before the coil is installed, the two supporting plates 43 extend below the upper yoke assembly, releasing the clamping mechanism 3 from the side posts. Then, the hydraulic cylinder is activated, extending its piston rod to raise the lifting base plate 42 and the upper yoke assembly to a certain height, making the bottom surface of the upper yoke assembly higher than the top surfaces of the side posts and the middle posts. Subsequently, the device or the iron core is moved laterally to smoothly install the coil onto the side posts and the middle posts. After the coil is installed, the device is moved back to its original position, and the clamping mechanism 3 clamps the side posts again. Then, the piston rod of the hydraulic cylinder retracts, causing the lifting base plate 42 and the upper yoke assembly to descend. The descended upper yoke assembly is in the pre-insertion position, at which point the end of the upper yoke assembly is at the same level as or has a slight gap with the tops of the side posts and the middle posts, but they are not yet intersected, creating conditions for subsequent edge trimming and intersecting insertion.

[0024] The downward pressure limiting structure 5 is elastically mounted on the lifting base plate 42 to press the upper yoke assembly from above, ensuring that the top surfaces of each upper yoke plate are in the same plane. The downward pressure limiting structure 5 includes a floating base plate 51, two upper pressing plates 52, and a vertical elastic structure 514. The floating base plate 51 is connected to the lifting base plate 42 through the vertical elastic structure 514. The floating base plate 51 is provided with guide posts 512, which are sleeved with the column cylinders 421 on the lifting base plate 42 to improve lifting stability.

[0025] Three downward pressing arms 511 are formed at one end of the floating base plate 51 extending into the opening of the frame 1. The three downward pressing arms 511 are arranged at equal intervals in the transverse direction. Two upper pressing plates 52 are slidably engaged with the floating base plate 51 in the transverse direction. Each upper pressing plate 52 is disposed between two adjacent downward pressing arms 511 and corresponds vertically to the load-bearing plate 43 below. Each upper pressing plate 52 has a groove at its end, which engages with the load-bearing plate 43 to allow the upper pressing plate 52 and the load-bearing plate 43 to move laterally synchronously without affecting the elastic lifting and lowering of the floating base plate 51 relative to the lifting base plate 42. The bottom surfaces of the two upper pressing plates 52 and the bottom surfaces of the three downward pressing arms 511 are located in the same plane, used to press the upper yoke assembly from above to prevent it from vertically shifting during subsequent edge trimming and pressing.

[0026] like Figure 5 , Figure 6 As shown, the edge-trimming mechanism 6 is disposed on the floating base plate 51 and is used to increase the end spacing of adjacent upper yoke iron pieces before re-insertion, so that the corresponding iron piece ends can be staggered and aligned. The edge-trimming mechanism 6 includes an edge-trimming drive assembly 61, a longitudinal shifting pressure shaft 62, a front lever 63, a rear lever 64, a first lever 65, a second lever 66, a locking frame 67, a bending plate 68, a guide double shaft 69, and an optical axis 601.

[0027] The edge-shifting drive assembly 61 is preferably a motor lead screw structure, which is longitudinally mounted on the lower pressure arm 511 located on one side. Bending plates 68 are mounted on both sides of the lower pressure arms 511. The bending plates 68 are L-shaped, with a longitudinal groove 681 on their bottom surface, and the guide double shaft 69 is located within the groove 681. The front lever 63 and the rear lever 64 are arranged parallel to each other longitudinally, and are slidably mounted on the guide double shaft 69. The distance between them is pre-adjusted to match the thickness of the single upper yoke sheet. The first lever 65 is fixed to the bottom end of the rear lever 64 and faces the top of the side post; the second lever 66 is fixed to the bottom end of the front lever 63 and faces the end of the upper yoke assembly. The locking frame 67 is fitted onto the top ends of the first lever 65 and the second lever 66. The distance between them can be finely adjusted within the locking frame 67. After adjustment, they are tightened and fixed with screws to ensure that the distance between them precisely matches the thickness of the upper yoke sheet.

[0028] The longitudinal shifting pressure shaft 62 is arranged laterally, with one end screwed into the edge-shifting drive assembly 61, and the other end extending to the opposite lower pressure arm 511. The lower pressure arm 511 on this side is provided with the optical shaft 601, which engages with the end of the longitudinal shifting pressure shaft 62 to guide its horizontal movement. A connecting rod 621 is sleeved on the longitudinal shifting pressure shaft 62, and the connecting rod 621 is fixedly connected to the front lever 63. Preferably, the length of the connecting rod 621 is adjustable. This allows the longitudinal shifting pressure shaft 62 to drive the front lever 63 and the rear lever 64 to move longitudinally synchronously when moving laterally. Activating the edge-shifting drive assembly 61 drives the longitudinal shifting pressure shaft 62 to move laterally, causing the first lever 65 and the second lever 66 to insert into the end gaps of adjacent upper yoke iron pieces, widening the distance between the ends of adjacent iron pieces and aligning the ends of each upper yoke iron piece with the top slots of the corresponding side post or middle post below in an alternating pattern.

[0029] The two sets of insert mechanisms 7 are respectively installed at one end of the two load-bearing plates 43, and are used to press down the upper yoke iron plate and complete the final staggered insertion after the iron plate ends are accurately staggered. Each set of insert mechanisms 7 includes an insert drive assembly 71, a pressing belt 72, a metal plate 73, and a flexible belt 74.

[0030] The load-bearing plate 43 is designed with a Z-shaped structure, and the insert drive assembly 71 is preferably a motor helical gear structure, which is installed on the vertical middle section of the load-bearing plate 43. The lower pressure belt 72 is wound around the longitudinal shifting pressure shaft 62 and stretched longitudinally to the lower pressure arm 511. The upper pressure plate 52 and the lower pressure arm 511 in the middle position are provided with through slots 515 for the lower pressure belt 72 to pass through and abut against the top surface of the upper yoke assembly.

[0031] The metal plate 73 is longitudinally slidably disposed within the bottom horizontal section of the load-bearing plate 43, providing rigid support. The metal plate 73 has a helical toothed groove 731, which meshes with the helical gear of the insert drive assembly 71. A receiving groove 75 is formed on the bottom horizontal section of the load-bearing plate 43. The flexible belt 74 is disposed within the receiving groove 75 and positioned above the metal plate 73. Both ends of the flexible belt 74 are fixed to the ends of the receiving groove 75, with the middle section suspended. In the initial state, the metal plate 73 is supported below the flexible belt 74, keeping the flexible belt 74 flat to support the bottom surface of the upper yoke assembly.

[0032] After the edge-trimming mechanism 6 completes the edge trimming and the ends of each upper yoke iron piece are staggered and aligned, the longitudinal pressing shaft 62 continues to move laterally, and the lower pressing band 72 moves accordingly and presses the upper yoke iron pieces downward into the top slots of the corresponding side pillars or middle pillars; at the same time, the insert driving assembly 71 drives the metal plate 73 to slide longitudinally to free up the corresponding area of ​​the receiving slot 75, and the flexible band 74 deforms downward flexibly after losing support, making room for the staggered insertion of the upper yoke iron pieces, thereby ensuring that each upper yoke iron piece can be smoothly and accurately inserted back into the staggered position, restoring the complete magnetic circuit structure of the iron core.

[0033] To further ensure that the upper yoke plate does not tip over during the re-insertion process, such as Figure 4 , Figure 7 As shown, the device also includes a stop mechanism 8. The stop mechanism 8 includes a rear stop 81, a swing arm 82, a telescopic shaft 83, a front stop 84, and an anti-rotation block 85.

[0034] The rear stop bar 81 is longitudinally slidably mounted on the bottom horizontal section of the load-bearing plate 43 and extends upward. The swing arm 82 is hinged to the side of the upper pressure plate 52, and its bottom end extends into the movement path of the rear stop bar 81. One end of the telescopic shaft 83 is hinged to the top of the swing arm 82, and the other end extends toward the free end of the upper pressure plate 52. The front stop bar 84 is longitudinally slidably hinged to the side of the upper pressure plate 52, and one end is hinged to the end of the telescopic shaft 83; in the free state, the front stop bar 84 is parallel to the upper pressure plate 52 to avoid obstructing the passage of the upper yoke plate. The anti-rotation block 85 is located on the side of the front stop bar 84.

[0035] When the upper yoke assembly moves longitudinally and abuts against the rear stop 81, it pushes the rear stop 81 to slide longitudinally. The rear stop 81 pushes against the bottom end of the swing rod 82, causing the swing rod 82 to swing around its hinge center. The top end of the swing rod 82 drives the front stop 84 to swing via the telescopic shaft 83. The rear stop 81 and the front stop 84 cooperate to clamp the two longitudinal end faces of the upper yoke assembly. When the front stop 84 rotates to a vertical position, the anti-rotation block 85 abuts against the upper clamping plate 52 to restrict the front stop 84 from continuing to rotate. At this time, the plate surface of the front stop 84 is parallel to the end face of the upper yoke assembly, thereby improving clamping stability.

[0036] Furthermore, the lower pressure arm 511 located in the middle position is also provided with the swing arm 82, the telescopic shaft 83 and the front stop bar 84, and the side of the swing arm 82 is provided with a synchronizing rod, which is connected to the adjacent swing arm 82 so that the front stop bar 84 on each lower pressure arm 511 swings synchronously.

[0037] Based on the above device structure, the working process of the method for re-inserting the yoke iron sheet on the iron core according to the present invention is as follows: Step S1: Positioning Preparation. First, based on the center distance between the side column and the middle column of the iron core to be processed, adjust the distance between the two load-bearing plates 43 using the distance adjustment rod 44 to correspond to the center distance between the columns; move the entire device to cooperate with the iron core, so that the upper yoke assembly is located between the two load-bearing plates 43 and the two upper clamping plates 52, and the stop mechanism 8 clamps the longitudinal end faces of the upper yoke assembly.

[0038] Step S2: Horizontal clamping and longitudinal clamping are linked. The width-adjusting motor 21 is started, driving the two width-adjusting base plates 22 on both sides to move towards each other until they abut against the side posts on both sides of the iron core; at the same time, the sleeve shaft 32 rotates under the constraint of the pull wire 34, driving the two longitudinal clamping plates 31 to move towards each other to clamp the two ends of the side posts in the longitudinal direction, thereby realizing the lateral positioning and temporary fixation of the device and the iron core.

[0039] Step S3: Overall Lifting and Coil Relocation. Activate the lifting drive 41 to lift the lifting base plate 42 and its supporting upper yoke assembly as a whole, so that the bottom surface of the upper yoke plate is higher than the top surface of the side column and the middle column; then loosen the clamping of the longitudinal clamping plate 31 and the width-adjusting base plate 22 on the side column, and then slide the device laterally or move the iron core to allow the coil to be fitted onto the side column and the middle column.

[0040] Step S4: Return to the pre-insertion position. After the coil assembly is completed, reset the device and re-clamp the side post through the width adjustment base plate 22 and the clamping mechanism 3; the lifting drive 41 drives the lifting base plate 42 to descend, so that the upper yoke assembly returns to the pre-insertion position. At this time, the end of the upper yoke plate is at the same horizontal plane as the top of the side post and the middle post or has a small gap, but they have not yet crossed.

[0041] Step S5: Automatic edge shifting and staggered alignment. The edge shifting drive assembly 61 is activated, driving the longitudinal shifting pressure shaft 62 to move laterally. The front lever 63 and the rear lever 64 move longitudinally synchronously accordingly. The first lever 65 and the second lever 66 are inserted between the ends of adjacent upper yoke iron pieces, expanding the distance between the ends of adjacent iron pieces to a distance greater than the thickness of a single iron piece, so that the ends of each upper yoke iron piece are staggered and aligned with the top slots of the corresponding side pillars or middle pillars below.

[0042] Step S6: Flexible repositioning and staggered insertion. After confirming the accurate staggered position of the iron sheet ends, the longitudinal pressure shaft 62 continues to move laterally, and the downward pressure band 72 moves accordingly, pressing down the entire upper yoke iron sheet; at the same time, the insert drive assembly 71 drives the metal plate 73 to slide longitudinally to clear the receiving groove 75, and the flexible band 74 is pressed down to reposition, so that the end of the upper yoke iron sheet can be smoothly inserted into the top slot of the side post and the middle post, completing the staggered insertion of the upper yoke iron sheet and restoring the complete assembly state of the iron core.

[0043] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for re-inserting yoke plates on an iron core, comprising a device for re-inserting yoke plates on an iron core, the device including a frame and a side post abutting mechanism, a clamping mechanism, a lifting mechanism, a downward pressing and limiting structure, a side-pulling mechanism, and an insertion mechanism mounted on the frame; characterized in that, Includes the following steps: Adjust the spacing between the two load-bearing plates used to support the upper yoke group according to the center distance between the columns, and move the device to match the iron core so that the upper yoke group is located between the two load-bearing plates and the upper pressing plate of the lower pressing limit structure. The drive side column clamping mechanism moves laterally and abuts against the side columns on both sides of the iron core. The clamping mechanism moves in conjunction with the side column abutting feed or after the side column abutting is completed, so as to clamp the side column longitudinally. The drive lifting mechanism raises the upper yoke assembly as a whole, so that the bottom surface of the upper yoke sheet is higher than the top of the side column and the middle column; the clamp is loosened, and the lateral sliding device or iron core is used to place the coil on the side column and the middle column. After the coil assembly is completed, the coil is reset and the side post is re-clamped. The lifting mechanism is then driven to descend, causing the upper yoke assembly to fall back to the pre-insertion position. Start the edge-trimming mechanism, drive the longitudinal pressure shaft to feed laterally, and drive the trim piece to move longitudinally synchronously, so that the trim piece is inserted into the end gap of the adjacent upper yoke iron piece and the end gap of the adjacent upper yoke iron piece is expanded to be greater than the thickness of a single upper yoke iron piece, so as to achieve staggered alignment of the end of each upper yoke iron piece with the top groove of the corresponding side post or middle post below. The longitudinal pressure shaft continues to feed laterally, and the lower pressure belt wrapped around the longitudinal pressure shaft presses down the upper yoke sheet; At the same time, the insert mechanism drives the longitudinally sliding metal plate to slide and create a clearance area, so that the flexible strip supported by the metal plate loses its support and deforms downwards, making way for the staggered insertion of the upper yoke iron pieces, thus completing the staggered re-insertion of the upper yoke iron pieces.

2. The method for re-inserting the yoke sheet on the iron core according to claim 1, characterized in that, When the upper yoke assembly falls back to the pre-insertion position, the end of the upper yoke plate is on the same horizontal plane or has a small gap with the top of the side post and the middle post, but they have not yet crossed.

3. The method for re-inserting the yoke sheet on the iron core according to claim 1 or 2, characterized in that, The device also includes an end-face clamping structure, which includes a rear stop, a swing arm, a telescopic shaft, a front stop, and an anti-rotation block. After the device is moved to engage with the iron core and before the drive side column abutment mechanism moves laterally, the upper yoke group moves longitudinally and pushes against the rear stop. The rear stop drives the front stop to swing through the swing arm and the telescopic shaft. The rear stop and the front stop rotated to a vertical position cooperate to clamp the two longitudinal ends of the upper yoke group.

4. The method for re-inserting the yoke sheet on the iron core according to any one of claims 1 to 3, characterized in that, The clamping mechanism includes longitudinal clamping plates and a sleeve shaft. The sleeve shaft includes a first shaft section and a second shaft section that are sleeved together and can transmit torque. The first shaft section is a double-acting lead screw. The two longitudinal clamping plates are respectively screwed to the two ends of the double-acting lead screw. The end of the second shaft section is provided with a wire groove, and a pull wire is wound in the wire groove. The pull wire is connected to a spring cylinder fixed on the frame. The side column pressing mechanism includes a width adjusting motor, a lead screw shaft, and two width adjusting base plates. During the side column pressing and feeding process, the sleeve shaft moves laterally with the width adjusting base plates and rotates under the constraint of the pull wire, driving the two longitudinal clamping plates to move towards each other to clamp the side column. The spring cylinder buffers the stroke difference between the width adjusting base plate and the longitudinal clamping plates.

5. The method for re-inserting the yoke sheet on the iron core according to claim 4, characterized in that, A rotary spring is fitted on the sleeve shaft; when the width adjustment base plate is reset, the rotary spring drives the sleeve shaft to rotate in the opposite direction, so that the pull wire is automatically wound up, and drives the two longitudinal clamping plates to move in opposite directions to loosen the side post.

6. The method for re-inserting the yoke sheet on the iron core according to any one of claims 1 to 5, characterized in that, Two load-bearing plates are driven by a spacing adjustment rod rotatably mounted on the lifting base plate to move towards or away from each other; the lower pressure limiting structure includes a floating base plate connected to the lifting base plate by a vertical elastic structure, and an upper pressing plate is slidably engaged with the floating base plate and moves laterally synchronously with the load-bearing plates; the upper pressing plate cooperates with the load-bearing plates to clamp the upper yoke iron group from the top and bottom, so that the top surfaces of each upper yoke iron piece are in the same plane.

7. The method for re-inserting the yoke sheet on the iron core according to any one of claims 1 to 6, characterized in that, The edge-shifting mechanism includes a front shifter, a rear shifter, a front shifter piece fixed to the bottom of the front shifter, a rear shifter piece fixed to the bottom of the rear shifter, and a locking frame sleeved on the top of the front and rear shifters. The front and rear shifters are arranged parallel to each other in the longitudinal direction. The distance between the front and rear shifters is adjusted and locked by the locking frame to match the thickness of the single upper yoke sheet. When the longitudinal pressure shaft is fed laterally, the front shifter is moved by the connecting rod sleeved on the longitudinal pressure shaft, and the rear shifter is moved synchronously in the longitudinal direction under the constraint of the locking frame, so that the front and rear shifters are inserted into the gap between the ends of adjacent upper yoke sheets.

8. The method for re-inserting the yoke sheet on the iron core according to any one of claims 1 to 7, characterized in that, The load-bearing plate is designed with a Z-shaped structure, and the insert drive assembly of the insert mechanism is installed in the vertical middle section of the load-bearing plate. The insert drive assembly includes a motor and a helical gear connected to the output shaft of the motor. The metal plate is provided with a helical tooth groove that meshes with the helical gear. The insert drive assembly drives the metal plate to slide longitudinally through the meshing of the helical gear and the helical tooth groove. The flexible belt is located in the receiving groove of the bottom horizontal section of the load-bearing plate. The two ends of the flexible belt are fixed to the two ends of the receiving groove, and the middle part is suspended above the metal plate.

9. The method for re-inserting the yoke sheet on the iron core according to any one of claims 1 to 8, characterized in that, The edge-shifting mechanism and the insert mechanism constitute an edge-shifting alignment and flexible clearance combination mechanism, which is detachably installed on the device. For upper yoke iron sheets of different thicknesses, the distance between the front and rear paddles, the distance between the front and rear levers, and the sliding stroke of the metal plate in the edge-shifting alignment and flexible clearance combination mechanism are replaced or adjusted.

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