A foil tension device for a transformer foil winder

Abstract

This utility model relates to the field of transformer technology, specifically disclosing a foil tensioning device for a transformer foil winding machine, comprising: a base, a bracket fixedly connected to one side of the top of the base, an adjusting cavity fixedly connected to the other side of the top of the base, a positioning block fixedly connected to the middle of the inner sidewall of the guide groove, two short rods fixedly connected to the surface of the first hydraulic telescopic rod, a telescopic rod hinged to the surface of the first movable clamp, a toothed plate fixedly connected to the output end of the second hydraulic telescopic rod, an adjusting block meshing with the surface of the second adjusting gear, and a push rod fixedly connected to the output end of the first hydraulic telescopic rod. This utility model, through the combined use of the first hydraulic telescopic rod, the extrusion roller, the pulling roller, the push rod, the telescopic rod, the first adjusting gear, and the sliding groove, makes the foil more compact when wound, and allows for adjustment of its tension during winding. This adjustment also avoids friction with the already wound foil on the surface of the winding roller, preventing wear of the foil.

Description

Technical Field

[0001] This utility model belongs to the field of transformer technology, specifically relating to a foil tensioning device for a transformer foil winding machine. Background Technology

[0002] In existing technologies, the tension control of transformer foil winding machines during foil winding typically relies on manual adjustment or relatively simple mechanical structures. This approach has several drawbacks: low automation (due to excessive manual intervention, which increases labor costs and makes production efficiency susceptible to human factors, hindering efficient and continuous production); poor tension adjustment accuracy (simple mechanical structures struggle to precisely control foil tension, leading to unstable tension during winding, affecting the tightness and uniformity of coil winding, and consequently reducing the electrical performance and mechanical strength of the coil); poor versatility and adaptability (existing devices often struggle to flexibly adjust to foils of different thicknesses and materials, failing to meet diverse production needs); and significant foil wear (during tensioning, significant friction occurs between the foil surface and the extrusion rollers, resulting in severe foil wear, reducing foil lifespan and winding quality).

[0003] Chinese patent CN209658012U discloses a foil tensioning device for a transformer foil winding machine, comprising a base on which a winding roller is rotatably mounted. The device is characterized by: a support frame fixedly mounted on the base; a first slide and a second slide slidably mounted on the support frame; a drive motor fixedly mounted at one end of the support frame; elastic telescopic rods fixedly mounted on both the first and second slides; a foil pressing roller rotatably mounted at the end of each elastic telescopic rod; the circular cross-section of the foil pressing roller being tangent to the circular cross-section of the winding roller; a hydraulic cylinder fixedly mounted on the support frame; and a foil pulling roller rotatably mounted at the end of the telescopic rod on the hydraulic cylinder. The foil pulling roller and the foil pressing roller work together. The advantages of this invention compared to existing technologies are: the overall operation of the foil tensioning device for a transformer foil winding machine is simple, effectively reducing the looseness problem during foil winding, improving the uniformity of foil tension during winding, and ensuring the production quality of the transformer.

[0004] However, while the above-mentioned technical solution can achieve the purpose of adjusting the tension of the foil during winding, when adjusting the foil tension, the pulling roller will push the foil to the right, and the two pressing rollers will also squeeze the foil. During this process of the foil moving to the right, the foil that is squeezed on the winding roller may be pulled at the same time, which will cause the foil to generate greater friction. Since the winding roller is only rotated inside the support, when the pulling roller pulls the foil, both ends of the foil are subjected to force, which will cause friction between the foil and the winding roller, resulting in wear between the foils and reducing product quality. Therefore, it has certain limitations in use. Utility Model Content

[0005] The purpose of this invention is to provide a foil tensioning device for a transformer foil winding machine to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A foil tensioning device for a transformer foil winding machine includes: a base, a bracket fixedly connected to one side of the top of the base, and an adjusting cavity fixedly connected to the other side of the top of the base. A guide groove is formed in the center of the surface of the adjusting cavity. A positioning block is fixedly connected to the center of the inner wall of the guide groove. A first hydraulic telescopic rod is fixedly connected to the surface of the positioning block. Two short rods are fixedly connected to the surface of the first hydraulic telescopic rod. An adjusting plate is fixedly connected to the bottom end of the short rods. A sliding groove is formed at the bottom of the adjusting plate. A connecting column is slidably connected inside the sliding groove. A first movable clamp is fixedly connected to the bottom end of the connecting column. The surface of the first movable clamp is hinged. The device includes a telescopic rod. A second hydraulic telescopic rod is fixed to and passes through one side of the adjustment cavity. A toothed plate is fixedly connected to the output end of the second hydraulic telescopic rod. Two first adjusting gears mesh on the surface of the toothed plate. A second adjusting gear is fixedly connected to the top of the first adjusting gear. An adjusting block meshes on the surface of the second adjusting gear. A connecting short rod is fixedly connected inside the adjusting block. Vertical grooves are provided on both sides of the inner sidewall of the guide groove. A moving block is slidably connected inside the vertical groove. The bottom end of the connecting short rod is fixedly connected to the back of the moving block. A push rod is fixedly connected to the output end of the first hydraulic telescopic rod. The bottom end of the push rod is fixedly connected to the surface of the telescopic rod.

[0008] Preferably, a sleeve rod is fixedly connected to the surface of the movable block, a return spring is fixedly connected to the inner side wall of the sleeve rod, a pressing block is fixedly connected to one end of the return spring, a shrinking rod is fixedly connected to one side of the pressing block, a first positioning frame is fixedly connected to the end of the shrinking rod away from the pressing block, a pressing roller is rotatably arranged inside the first positioning frame, a second movable clamp is fixedly connected to one side of the surface of the shrinking rod, and the output end of the telescopic rod is hinged to the surface of the second movable clamp.

[0009] Preferably, the output end of the first hydraulic telescopic rod is fixedly connected to a second positioning frame, and a pull roller is rotatably mounted inside the frame.

[0010] Preferably, a fixed frame is fixedly connected to one side of the bracket, a servo motor is fixedly connected to one side of the fixed frame, a first gear is fixedly connected to the output end of the servo motor, and a second gear meshes with the surface of the first gear.

[0011] Preferably, a drive shaft is fixedly connected inside the second gear, and the end of the drive shaft away from the second gear is rotatably disposed inside the bracket, and a winding roller is fixedly connected to the surface of the drive shaft.

[0012] Preferably, a control panel is fixedly connected to the top of one side of the adjustment cavity, and the control panel is electrically connected to the first hydraulic telescopic rod, the telescopic rod, the second hydraulic telescopic rod and the servo motor respectively.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) Through the coordinated work of the first and second hydraulic telescopic rods, the device can realize the automatic adjustment of foil tension, reduce manual intervention, and improve production efficiency. By utilizing the gear transmission mechanism, namely the cooperation of the first adjusting gear, the second adjusting gear and the toothed plate, the device can accurately control the distance between the two extrusion rollers, thereby realizing the precise adjustment of foil tension and ensuring that the foil maintains stable tension during the winding process. By adjusting the output of the second hydraulic telescopic rod, the device can flexibly adjust the distance between the two extrusion rollers to adapt to the winding requirements of foils of different thicknesses and materials, thereby improving the versatility and adaptability of the device. During the tensioning process, the device avoids large friction between the foil surface and the extrusion rollers through the design of a reasonable mechanical structure, namely the telescopic rod and the return spring, thereby reducing the wear of the foil and improving the service life and winding quality of the foil.

[0015] (2) The tight fit between the extrusion roller and the winding roller, as well as the stable tension of the foil during the winding process, ensures the tightness and uniformity of the coil winding, and improves the electrical performance and mechanical strength of the coil. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present utility model;

[0017] Figure 2 This is a cross-sectional view of the extrusion roller of this utility model;

[0018] Figure 3-4 This is a top view of the adjusting plate of this utility model;

[0019] Figure 5 This is a cross-sectional view of the sleeve rod of this utility model;

[0020] In the diagram: 1. Base; 2. Bracket; 3. Adjustment cavity; 4. Guide groove; 5. Positioning block; 6. First hydraulic telescopic rod; 7. Adjustment plate; 8. Sliding groove; 9. Connecting column; 10. First movable clamp; 11. Telescopic rod; 12. Second hydraulic telescopic rod; 13. Gear plate; 14. First adjusting gear; 15. Second adjusting gear; 16. Adjustment block; 17. Connecting short rod; 18. Moving block; 19. Sleeve rod; 20. Return spring; 21. Squeezing block; 22. Retraction rod; 23. First positioning frame; 24. Squeezing roller; 25. Pulling roller; 26. Servo motor; 27. First gear; 28. Second gear; 29. ​​Winding roller; 30. Push rod. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1:

[0023] Please see Figures 1 to 5 As shown, a foil tensioning device for a transformer foil winding machine includes a base 1. A bracket 2 is fixedly connected to one side of the top of the base 1, and an adjusting cavity 3 is fixedly connected to the other side of the top of the base 1. A guide groove 4 is formed in the middle of the surface of the adjusting cavity 3. A positioning block 5 is fixedly connected to the middle of the inner wall of the guide groove 4. A first hydraulic telescopic rod 6 is fixedly connected to the surface of the positioning block 5. Two short rods are fixedly connected to the surface of the first hydraulic telescopic rod 6. An adjusting plate 7 is fixedly connected to the bottom end of the short rods. A sliding groove 8 is formed at the bottom of the adjusting plate 7. A connecting post 9 is slidably connected inside the sliding groove 8. A first movable clamp 10 is fixedly connected to the bottom end of the connecting post 9. The surface of the first movable clamp 10 is hinged with a telescopic rod 11. A second hydraulic telescopic rod 12 is fixed and passes through one side of the adjusting cavity 3. A toothed plate 13 is fixedly connected to the output end of the second hydraulic telescopic rod 12. Two first adjusting gears 14 mesh with the surface of the toothed plate 13. A second adjusting gear 15 is fixedly connected to the top of the first adjusting gear 14. An adjusting block 16 meshes with the surface of the second adjusting gear 15. A connecting short rod 17 is fixedly connected inside the adjusting block 16. Vertical grooves are opened on both sides of the inner sidewall of the guide groove 4. A moving block 18 is slidably connected inside the vertical groove. The bottom end of the connecting short rod 17 is fixedly connected to the back of the moving block 18.

[0024] The setting of the adjustment cavity 3 allows the guide groove 4 to be opened. The opening of the guide groove 4 allows the positioning block 5 to be fixed in the middle of its inner sidewall. The positioning block 5 facilitates the fixing of the first hydraulic telescopic rod 6. The setting of the first hydraulic telescopic rod 6 allows the short rod and the adjustment plate 7 to be fixed on its surface. The setting of the adjustment plate 7 allows the sliding groove 8 to be opened. The opening of the sliding groove 8 allows the connecting column 9 to slide inside it. The connecting column 9 facilitates the fixing of the first movable clamp 10. The setting of the second hydraulic telescopic rod 12 allows the toothed plate 13 to move left and right, thereby meshing with the surfaces of the two first adjustment gears 14 and making them roll, thereby causing the two second adjustment gears 15 to rotate and mesh with one side of the adjustment block 16, so that the two adjustment frames move towards or away from each other. It should be noted that two limiting rods are fixedly connected inside the adjustment block 16. The bottom end of the limiting rod is slidably connected to the inner sidewall of the adjustment cavity 3. The first adjustment gear 14 and the second adjustment gear 15 are both fixed by a rotating shaft, and the bottom end of the rotating shaft is rotatably set inside the adjustment cavity 3.

[0025] A sleeve rod 19 is fixedly connected to the surface of the movable block 18. A return spring 20 is fixedly connected to the inner side wall of the sleeve rod 19. A pressing block 21 is fixedly connected to one end of the return spring 20. A shrinking rod 22 is fixedly connected to one side of the pressing block 21. A first positioning frame 23 is fixedly connected to the end of the shrinking rod 22 away from the pressing block 21. A pressing roller 24 is rotatably arranged inside the first positioning frame 23. A second movable clamp is fixedly connected to one side of the surface of the shrinking rod 22. The output end of the telescopic rod 11 is hinged to the surface of the second movable clamp. A push rod 30 is fixedly connected to the output end of the first hydraulic telescopic rod 6. The bottom end of the push rod 30 is fixedly connected to the surface of the telescopic rod 11.

[0026] The movable block 18 allows the sleeve rod 19 to be fixed on its surface. The reset spring 20 is designed so that when the retracting rod 22 is compressed, the reset spring 20 is compressed, and when the retracting rod 22 stops being compressed, the reset spring 20 returns to its original position. The internal structure of the telescopic rod 11 is the same as that of the sleeve rod 19 and the retracting rod 22, which serves to compress and reset. The end of the foil that is continuously released can be released through the transmission mechanism, so that when the pulling roller 25 pulls the foil to the right, the foil has a certain tension, while avoiding excessive contact between the foil and the surface of the winding roller 29, thus reducing wear.

[0027] The output end of the first hydraulic telescopic rod 6 is fixedly connected to a second positioning frame, and a pull roller 25 is rotatably mounted inside the frame. The pull roller 25 allows the foil to be pulled and spread out.

[0028] A fixed frame is fixedly connected to one side of the bracket 2, and a servo motor 26 is fixedly connected to one side of the fixed frame. A first gear 27 is fixedly connected to the output end of the servo motor 26, and a second gear 28 meshes with the surface of the first gear 27. The servo motor 26 is configured to provide a certain driving force for the rotation of the first gear 27, and the rotation of the first gear 27 drives the second gear 28 to rotate.

[0029] A drive shaft is fixedly connected inside the second gear 28. The end of the drive shaft away from the second gear 28 is rotatably disposed inside the bracket 2. A winding roller 29 is fixedly connected to the surface of the drive shaft.

[0030] The rotation of the second gear 28 drives the winding roller 29 to rotate via the transmission shaft, ensuring that the foil is wound up. The surface of the extrusion roller 24 is in contact with the surface of the foil, pressing it onto the winding roller 29 to ensure stability during winding. The foil passes under the winding roller 29 and to the right of the pull roller 25. The surface of the foil is squeezed by the two extrusion rollers 24, and one side of the foil is in contact with the surface of the pull roller 25. When the first hydraulic telescopic rod 6 moves to the right, the pull roller 25 pulls the foil to the right, achieving the purpose of tensioning.

[0031] A control panel is fixedly connected to the top of one side of the adjustment cavity 3, and the control panel is electrically connected to the first hydraulic telescopic rod 6, the second hydraulic telescopic rod 12 and the servo motor 26 respectively.

[0032] The working principle of this utility model is as follows: When the foil needs to be wound, the operator controls the servo motor 26 to work. The output end of the servo motor 26 drives the first gear 27 to rotate. Then, the first gear 27 drives the second gear 28 meshing with it to rotate, which in turn drives the winding roller 29 to rotate through the transmission rod. The operator continuously releases the roller at the end of the foil to be wound, so that the foil can be continuously wound by the winding roller 29. The foil passes under the winding roller 29 and contacts the surface of the pressing roller 24 located below. Then it passes through one side of the pulling roller 25 and adheres to the surface of the pulling roller 25. Then it contacts the surface of the pressing roller 24 above, so that it adheres tightly to the surface of the winding roller 29. Then the foil is continuously wound by the winding roller 29. When the foil is wound, it is pressed tightly against the winding roller 29 by two extrusion rollers 24 to ensure the tightness of the foil winding. The operator can also control the retraction of the first hydraulic telescopic rod 6, causing it to move the second positioning frame to the right. This causes the pull roller 25 to pull the foil to the right. Simultaneously, the first positioning frame 23 moves the pull roller 25 to the right, further pulling the foil to the right. When the output end of the first hydraulic telescopic rod 6 moves to the right, the telescopic rod 11 is pressed to the right by the push rod 30, causing the connecting column 9 to move the first movable clamp 10 to the right. This causes the lower retraction rod 22 to retract to the right, causing the lower extrusion roller 24 to move to the right and stop extruding the foil. At this point, the foil is pulled to the right. The foil is moved to open, but the portion of the foil about to be wrapped around the winding roller 29 is always squeezed by the upper extrusion roller 24. This avoids excessive friction between the foil surface and the contact points of the upper and lower extrusion rollers 24 when the pulling roller 25 pulls the foil, ensuring the safety of the foil and reducing wear. When adjusting the position between the two extrusion rollers 24, the operator only needs to control the second hydraulic telescopic rod 12. The output end of the second hydraulic telescopic rod 12 drives the toothed plate 13 to move to the left, thereby making the toothed plate 13 mesh with the surfaces of the two first adjusting gears 14, which in turn causes the two second adjusting gears 15 to rotate. Subsequently, the rotation of the two second adjusting gears 15 drives the adjusting block 16 to move towards or away from each other, thereby causing the connecting short rod 17 to drive the moving block 1. The two first positioning frames 23 move towards or away from each other, ultimately adjusting the distance between them. This allows for adjustment of the distance between the two extrusion rollers 24. As the distance between the two extrusion rollers 24 gradually decreases, the retraction rod 22 retracts into the sleeve rod 19. At this time, the extrusion block 21 presses the return spring 20, making the extrusion rollers 24 press the foil on the surface of the winding roller 29 more tightly, ensuring the tightness of the foil during winding. When the two first positioning frames 23 approach each other, the two ends of the telescopic rod 11 are hinged through the first movable clamp 10 and the second movable clamp, allowing it to move towards each other in conjunction with the two extrusion rollers 24. Simultaneously, the telescopic rod 11 continuously retracts, pressing the return spring 20 inside. Subsequently, when the two extrusion rollers 24 move away from each other...At this time, the return spring 20 inside the telescopic rod 11 automatically resets, achieving a linkage with it.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A foil tensioning device for a transformer foil winding machine, characterized in that, include: A base (1) is provided. A bracket (2) is fixedly connected to one side of the top of the base (1). An adjustment cavity (3) is fixedly connected to the other side of the top of the base (1). A guide groove (4) is provided in the middle of the surface of the adjustment cavity (3). A positioning block (5) is fixedly connected to the middle of the inner wall of the guide groove (4). A first hydraulic telescopic rod (6) is fixedly connected to the surface of the positioning block (5). Two short rods are fixedly connected to the surface of the first hydraulic telescopic rod (6). An adjustment plate (7) is fixedly connected to the bottom end of the short rods. A sliding groove (8) is provided at the bottom of the adjustment plate (7). A connecting column (9) is slidably connected inside the sliding groove (8). A first movable clamp (10) is fixedly connected to the bottom end of the connecting column (9). A telescopic rod (11) is hinged to the surface of the first movable clamp (10). A side of the adjustment cavity (3) is provided with a guide groove (4) in the middle of the inner wall of the guide groove (4). A second hydraulic telescopic rod (12) is fixed and penetrates through it. A toothed plate (13) is fixedly connected to the output end of the second hydraulic telescopic rod (12). Two first adjusting gears (14) mesh on the surface of the toothed plate (13). A second adjusting gear (15) is fixedly connected to the top of the first adjusting gear (14). An adjusting block (16) meshes on the surface of the second adjusting gear (15). A connecting short rod (17) is fixedly connected inside the adjusting block (16). Vertical grooves are provided on both sides of the inner wall of the guide groove (4). A moving block (18) is slidably connected inside the vertical groove. The bottom end of the connecting short rod (17) is fixedly connected to the back of the moving block (18). A push rod (30) is fixedly connected to the output end of the first hydraulic telescopic rod (6). The bottom end of the push rod (30) is fixedly connected to the surface of the telescopic rod (11).

2. The foil tensioning device for a transformer foil winding machine according to claim 1, characterized in that: A sleeve rod (19) is fixedly connected to the surface of the movable block (18). A return spring (20) is fixedly connected to the inner side wall of the sleeve rod (19). A pressing block (21) is fixedly connected to one end of the return spring (20). A shrinking rod (22) is fixedly connected to one side of the pressing block (21). A first positioning frame (23) is fixedly connected to one end of the shrinking rod (22) away from the pressing block (21). A pressing roller (24) is rotatably arranged inside the first positioning frame (23). A second movable clamp is fixedly connected to one side of the surface of the shrinking rod (22), and the output end of the telescopic rod (11) is hinged to the surface of the second movable clamp.

3. The foil tensioning device for a transformer foil winding machine according to claim 1, characterized in that: The output end of the first hydraulic telescopic rod (6) is fixedly connected to the second positioning frame, and the internal rotation of the frame is provided with a pull roller (25).

4. The foil tensioning device for a transformer foil winding machine according to claim 1, characterized in that: A fixed frame is fixedly connected to one side of the bracket (2), and a servo motor (26) is fixedly connected to one side of the fixed frame. A first gear (27) is fixedly connected to the output end of the servo motor (26), and a second gear (28) meshes with the surface of the first gear (27).

5. The foil tensioning device for a transformer foil winding machine according to claim 4, characterized in that: The second gear (28) is fixedly connected to a drive shaft inside. The end of the drive shaft away from the second gear (28) is rotatably disposed inside the bracket (2). A winding roller (29) is fixedly connected to the surface of the drive shaft.

6. The foil tensioning device for a transformer foil winding machine according to claim 1, characterized in that: A control panel is fixedly connected to the top of one side of the adjustment cavity (3), and the control panel is electrically connected to the first hydraulic telescopic rod (6), the telescopic rod (11), the second hydraulic telescopic rod (12) and the servo motor (26).

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