Universal mold for transformer coil production

Abstract

The utility model discloses a universal mould for producing a transformer coil, which comprises a main shaft, an adjusting device and a top cover, one end of the main shaft is provided with a connecting flange which is connected with external power equipment for providing rotation, and the other end of the main shaft is a cylindrical connecting part and is movably connected with the external equipment. The adjusting device comprises an adjusting assembly, an upper sliding plate assembly, a lower sliding plate assembly and a pulling plate assembly, the adjusting assembly is movably arranged on the connecting part, one end of the pulling plate assembly is connected with the adjusting assembly, and the other end of the pulling plate assembly is movably connected with the upper sliding plate assembly and the lower sliding plate assembly. The tension plate is pushed through the adjusting device so that the upper sliding side plate assembly and the lower sliding side plate assembly can be ejected outwards, the two top covers can make close contact with the inner ring of the winding mold to form a tight supporting state, compared with a traditional fixing mode, the installation efficiency is improved, meanwhile, the problem caused by the gap problem is solved, and the installation efficiency is improved. And the production of the transformer coil is more efficient, and meanwhile, the winding quality of the transformer coil is also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer coil production equipment, and specifically relates to a universal mold for transformer coil production. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. Its main components are the primary coil, secondary coil, and iron core. The quality of the winding of the transformer coil is directly related to the performance of the transformer. In the traditional transformer coil winding technology. In the traditional winding device, it is necessary to sleeved the winding mold on the winding rotating shaft, and use baffles on both sides of the winding mold to fix it to prevent shaking, and the operation is relatively cumbersome. At the same time, in order to facilitate the installation of the winding mold on the winding rotating shaft, there will be a certain gap between the two after connection. This existing gap will cause relative displacement between the winding mold and the winding rotating shaft during the winding process, ultimately affecting the quality of the coil winding. And because the winding rotating shaft rotates at a high speed during winding, the existence of the gap causes continuous relative friction between the winding mold and the winding rotating shaft, resulting in wear of the winding mold and the winding rotating shaft, reducing their service life. Summary of the Invention

[0003] (1) Technical Problems to be Solved

[0004] The technical problem to be solved by the utility model is that the connection between the traditional winding mold and the winding shaft is cumbersome, and the connection method with a gap left when the traditional winding mold and the winding shaft are connected results in a large relative friction between the winding mold and the winding shaft, leading to more wear of the winding mold and the winding shaft and uneven winding of the variable voltage wire coil.

[0005] (2) Technical Solutions

[0006] To solve the above problems, the utility model provides the following technical solutions:

[0007] A universal mold for transformer coil production includes a main shaft, an adjusting device, and a top cover. The top cover is arranged on the adjusting device, and the adjusting device is arranged on the main shaft and can rotate together with the rotation of the main shaft. One end of the main shaft is provided with a connecting flange for connecting an external power device providing rotation, and the other end is a cylindrical connecting portion and is movably connected to an external device;

[0008] The adjusting device includes an adjusting component, an upper sliding plate component, a lower sliding plate component, and a pulling plate component. The adjusting component is movably arranged on the connecting portion. One end of the pulling plate component is connected to the adjusting component, and the other end is movably connected to the upper sliding plate component and the lower sliding plate component;

[0009] The upper slide plate assembly includes a set of upper slide side plates symmetrically arranged left and right and an upper top plate fixedly connected to the set of upper slide side plates. The upper top plate is provided with a top column. A cylindrical hole is provided on the main shaft, and the top column can slide up and down in the cylindrical hole. A slide plate connection part is provided on the side of the upper slide side plate. A first waist-shaped hole is provided on the slide plate connection part, and the first waist-shaped hole is inclined;

[0010] The lower slide plate assembly includes a set of lower slide side plates symmetrically arranged left and right and a lower top plate fixedly connected to the set of lower slide side plates. The lower top plate is also provided with a top column, and a cylindrical hole movably connected to the top column is also provided on the main shaft on the same side. A connection groove is provided on the side of the lower slide side plate, and the outer dimension of the connection groove matches the outer dimension of the slide plate connection part. The two can piece together the upper slide side plate and the lower slide side plate into a structure similar to a rectangle. A second waist-shaped hole is provided on the lower slide side plate, and the second waist-shaped hole is inclined and the inclination direction is opposite to the inclination direction of the first waist-shaped hole (2bd);

[0011] The pulling plate assembly includes a set of pulling plates symmetrically arranged left and right. The pulling plate is provided with a first pulling component and a second pulling component. The first pulling component includes a set of first rollers and first pin shaft bolts. Each of the first rollers is arranged on the pulling plate through the first pin shaft bolt, and a first pulling component is provided in each of the first waist-shaped holes. The outer wall of the first roller contacts the inner side surface of the first waist-shaped hole. The second pulling component includes a set of second rollers and second pin shaft bolts. The second rollers are arranged on the pulling plate through the second pin shaft bolts, and a second pulling component is provided in each of the second waist-shaped holes. The outer wall of the second roller contacts the inner side surface of the second waist-shaped hole. The adjusting device further includes a set of outer fixing plates symmetrically arranged left and right. The outer fixing plates are arranged on the outer sides of the upper slide plate assembly and the lower slide plate assembly and are simultaneously connected to the first pin shaft bolts and the second pin shaft bolts.

[0012] Further, the connection part is provided with threads. The adjusting component includes an adjusting nut, a sliding sleeve, and a flange sleeve. The adjusting nut is connected to the connection part by means of threaded connection. The adjusting nut is sleeved in the flange sleeve and is movably connected to the flange sleeve. The other end of the flange sleeve is fixedly connected to one end of the sliding sleeve. The sliding sleeve is movably arranged on the connection part.

[0013] Further, a first groove is provided on the adjusting nut, and a second groove symmetrically arranged with the first groove is provided on the inner side surface of the flange sleeve. A plurality of balls are provided in the first groove and the second groove.

[0014] Further, at least one set of the first groove and the second groove is provided. The flange is provided with ball mounting holes, and the number of the ball mounting holes is the same as that of the second groove.

[0015] Further, both side surfaces of the sliding sleeve are fixedly connected to one end of a set of the tension plates, providing thrust or pulling force for the tension plates.

[0016] Further, a plurality of the first waist-shaped holes and the second waist-shaped holes are provided and uniformly arranged on the tension plates.

[0017] Further, two top covers are provided and symmetrically arranged up and down. The two top covers are respectively connected to the upper top plate and the lower top plate.

[0018] Further, grooves are further provided on both sides of the main shaft, and the two tension plates are respectively arranged in the two grooves.

[0019] Further, a scale sticker is further provided on the tension plate.

[0020] (III) Advantageous Effects

[0021] The advantageous effects of the present utility model are as follows:

[0022] The adjusting device pushes the tension plates, thereby pushing the upper sliding side plate assembly and the lower sliding side plate assembly outwards, so that the two top covers can be in close contact with the inner ring of the winding mold, forming a tightened state. Compared with the traditional fixed mode, the installation efficiency is improved, and the problems caused by the gap problem are solved. The production of the transformer coil is made more efficient, and the quality of the winding of the transformer coil is also improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the perspective view of the present utility model;

[0024] Figure 2 is the structural schematic diagram of the adjusting device of the present utility model;

[0025] Figure 3 is the structural schematic diagram of the tension plate assembly of the present utility model;

[0026] Figure 4 is Figure 3 the enlarged view at A in

[0027] Figure 5 is the cross-sectional view of the main shaft of the present utility model;

[0028] Figure 6 is the structural schematic diagram of the upper sliding plate assembly of the present utility model;

[0029] Figure 7It is a schematic structural diagram of the lower slide plate assembly of the present utility model;

[0030] Figure 8 It is a partial schematic structural diagram of the adjusting device of the present utility model;

[0031] Figure 9 It is a schematic structural diagram of the adjusting assembly of the present utility model;

[0032] Figure 10 It is a sectional view of the adjusting assembly of the present utility model;

[0033] Figure 11 It is a schematic structural diagram of the flange sleeve of the present utility model;

[0034] Figure 12 It is a schematic structural diagram of the adjusting nut of the present utility model.

[0035] Markings in the figure: 1 - main shaft, 2 - adjusting device, 3 - top cover, 4 - connecting part, 5 - groove, 6 - scale sticker;

[0036] 2a - adjusting assembly, 2aa - adjusting nut, 2ab - sliding sleeve, 2ac - flange sleeve, 2ad - first groove, 2ae - second groove, 2af - ball, 2ah - ball mounting hole;

[0037] 2b - upper slide plate assembly, 2ba - upper slide side plate, 2bb - upper top plate, 2bc - slide plate connecting part, 2bd - first kidney-shaped hole;

[0038] 2c - lower slide plate assembly, 2ca - lower slide side plate, 2cb - lower top plate, 2cc - connecting groove, 2cd - second kidney-shaped hole;

[0039] 2d - pull plate assembly, 2e - outer fixing plate, 2da - tension plate, 2db - first pulling assembly, 2dc - second pulling assembly;

[0040] 2dba - first roller, 2dbb - first pin bolt, 2dca - second roller, 2dcb - second pin bolt. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0042] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0043] Please refer to Figures 1-12 A universal mold for the production of transformer coils shown in the figure. This device is an integral part of the transformer coil winding equipment and is installed at the end of the transformer coil winding equipment, driving the transformer winding mold to rotate so as to realize the function of winding metal foil or metal wire into a coil.

[0044] It includes a main shaft 1, an adjusting device 2 and a top cover 3. The top cover 3 is arranged on the adjusting device 2, and the adjusting device 2 is arranged on the main shaft 1 and can rotate together with the rotation of the main shaft 1. One end of the main shaft 1 is provided with a connecting flange for connecting an external power device providing rotation, and the other end is a cylindrical connecting portion 4 and is movably connected to an external device;

[0045] The adjusting device 2 includes an adjusting component 2a, an upper slide plate component 2b, a lower slide plate component 2c and a pull plate component 2d. The adjusting component 2a is movably arranged on the connecting portion 4. One end of the pull plate component 2d is connected to the adjusting component 2a, and the other end is movably connected to the upper slide plate component 2b and the lower slide plate component 2c.

[0046] The adjusting component 2a is used to drive the movement of the upper slide plate component 2b and the lower slide plate component 2c to realize the control of the opening or closing of two sheets.

[0047] The upper slide plate component 2b includes a set of upper slide side plates 2ba symmetrically arranged left and right and an upper top plate 2bb fixedly connected to the set of upper slide side plates 2ba. The upper top plate 2bb is provided with a top column. There is a cylindrical hole on the main shaft 1, and the top column can slide up and down in the cylindrical hole. The side of the upper slide side plate 2ba is provided with a slide plate connecting portion 2bc, and the slide plate connecting portion 2bc is provided with a first waist-shaped hole, and the first waist-shaped hole 2bd is inclined;

[0048] The lower slide plate assembly 2c includes a set of left and right symmetric lower slide side plates 2ca and a lower top plate 2cb fixedly connected to the set of lower slide side plates 2ca. The lower top plate 2cb is also provided with a top post, and a cylindrical hole movably connected to the top post is also provided on the main shaft 1 on the same side. A connecting groove 2cc is provided on the side of the lower slide side plate 2ca, and the outer dimensions of the connecting groove 2cc match the outer dimensions of the slide plate connecting part 2bc. The two can piece together the upper slide side plate 2ba and the lower slide side plate 2ca into a structure similar to a rectangle. A second waist-shaped hole 2cd is provided on the lower slide side plate 2ca. The second waist-shaped hole 2cd is inclined and the inclination direction is opposite to the inclination direction of the first waist-shaped hole 2bd.

[0049] The pull plate assembly 2d includes a set of left and right symmetrically arranged pull plates 2da. The pull plate 2da is provided with a first pulling assembly 2db and a second pulling assembly 2dc. The first pulling assembly 2db includes a set of first rollers 2dba and first pin bolts 2dbb. Each first roller 2dba is arranged on the pull plate 2da through a first pin bolt 2dbb, and a first pulling assembly 2db is provided in each of the first waist-shaped holes 2bd. The outer wall of the first roller 2dba contacts the inner side surface of the first waist-shaped hole 2bd. The second pulling assembly 2dc includes a set of second rollers 2dca and second pin bolts 2dcb. The second rollers 2dca are arranged on the pull plate 2da through second pin bolts 2dcb, and a second pulling assembly 2dc is provided in each of the second waist-shaped holes 2cd. The outer wall of the second roller 2dca contacts the inner side surface of the second waist-shaped hole 2cd. The adjusting device 2 also includes a set of left and right symmetrically arranged outer fixing plates 2e. The outer fixing plates 2e are arranged on the outer sides of the upper slide plate assembly 2b and the lower slide plate assembly 2c and are simultaneously connected to the first pin bolt 2dbb and the second pin bolt 2dcb.

[0050] Specifically, the connecting part 4 is provided with threads. The adjusting assembly 2a includes an adjusting nut 2aa, a sliding sleeve 2ab, and a flange sleeve 2ac. The adjusting nut 2aa is connected to the connecting part 4 by means of threaded connection. The adjusting nut 2aa is sleeved in the flange sleeve 2ac and is movably connected to the flange sleeve 2ac. The other end of the flange sleeve 2ac is fixedly connected to one end of the sliding sleeve 2ab. The sliding sleeve 2ab is movably arranged on the connecting part 4. The adjusting nut 2aa is provided with a first groove 2ad, and a second groove 2ae symmetrically arranged with the first groove 2ad is provided on the inner side surface of the flange sleeve 2ac. A plurality of balls 2af are provided in the first groove 2ad and the second groove 2ae. At least one set of the first groove 2ad and the second groove 2ae is provided. The flange plate is provided with ball mounting holes 2ah, and the number of the ball mounting holes 2ah is the same as that of the second groove 2ae. A rubber plug for preventing the balls from falling is movably arranged on the ball mounting holes 2ah here.

[0051] In this implementation, since the adjusting nut 2aa is threadedly connected to the connecting portion 4, the adjusting nut 2aa can move on the connecting portion 4 by rotating. During the movement of the adjusting nut 4aa, it moves together with the flange 2ac, thereby pushing the sliding sleeve 2ab to move. When the sliding sleeve 2ab moves, it drives the two tension plates 2da to move. When rotating the adjusting nut 2aa, a relative rotation occurs between the adjusting nut 2aa and the flange 2ac. To make it easier for workers to rotate the adjusting nut 2aa, balls are designed between them, and the adjusting resistance is reduced through the design of the balls.

[0052] Specifically, both side surfaces of the sliding sleeve 2ab are fixedly connected to one end of a set of tension plates 2da, providing thrust or tension for the tension plates 2da.

[0053] Specifically, there are multiple first waist-shaped holes 2bd and second waist-shaped holes 2cd, which are evenly arranged on the tension plates 2da.

[0054] In this implementation, there are multiple first waist-shaped holes 2bd and second waist-shaped holes 2cd, which can effectively distribute the thrust provided by the adjusting device 2 evenly, so that the upper slide plate assembly 2b and the lower slide plate assembly 2c move more smoothly.

[0055] Specifically, there are two top covers 3, which are symmetrically arranged up and down, and the two top covers 3 are respectively connected to the upper top plate 2bb and the lower top plate 2cb.

[0056] In this implementation, there are two top covers 3 and they are symmetrically arranged. Such a design is to prevent the upper slide plate assembly 2b and the lower slide plate assembly 2c from directly contacting the winding mold, reducing their wear, which is a setting for improving the durability of the device.

[0057] Specifically, grooves 5 are also provided on both sides of the main shaft 1, and the two tension plates 2da are respectively arranged in the two grooves 5.

[0058] In this implementation, arranging the tension plates 2da in the grooves 5 can reduce the volume of the entire device on the one hand, and most importantly, it can make the tension plates 2da move under the certain restriction of the grooves 5, reducing the occurrence of shaking of the tension plates 2da during movement.

[0059] Specifically, a scale sticker 6 is also provided on the tension plate 2da.

[0060] In this implementation, the scale sticker 6 is provided to facilitate the staff to control the adjustment position.

[0061] Working principle: During production, the operator installs the winding die onto this device. Specifically, the winding die is sleeved onto the two top covers 3 of this decoration, and the left and right positions of the winding die are adjusted. Then, the operator manually uses a wrench or other tool to clamp the adjusting nut 2aa and rotate it. Since the adjusting nut 2aa is threadedly connected to the connecting part 4, the adjusting nut 2aa can move on the connecting part 4 by rotating. During the movement of the adjusting nut 4aa, it moves together with the flange 2ac, thereby pushing the sliding sleeve 2ab to move. When the sliding sleeve 2ab moves, it drives the two tension plates 2da to move. When the tension plates 2da move towards the end of the main shaft 1 away from the connecting part, the first pulling component 2db and the second pulling component 2dc provided on the tension plates respectively cooperate with the first kidney-shaped hole 2bd and the second kidney-shaped hole 2cd to achieve the purpose of expanding the upper sliding side plate 2ba and the lower sliding side plate 2ca to be tightened against the inner circle of the winding die. Specifically, when the first roller 2dba on the first pulling component 2db applies a moving thrust to the inner side edge of the first kidney-shaped hole 3bd, and the first kidney-shaped hole 3bd is inclined, the upper sliding side plate 2ba moves along the inclined direction of the first kidney-shaped hole 3bd. More specifically, when the first pulling component 2db on the tension plate 2da moves in a straight line towards the flange of the main shaft 1, the upper sliding side plate 2ba receives the extrusion thrust of the first roller 2dba through the first kidney-shaped hole 2bd, achieving the purpose of moving obliquely upward, and then pushing up the top cover 3 to be in close contact with and tightened against the inner circle of the winding die. Similarly, the movement mode of the lower sliding plate assembly 2c is the same as that of the upper sliding plate assembly 2b. When it is necessary to remove the winding die from this device, it can be achieved only by rotating the adjusting nut 2aa in the reverse direction.

[0062] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights. In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A universal mold for the production of transformer coils, characterized in that, It includes a main shaft (1), an adjusting device (2) and a top cover (3). The top cover (3) is arranged on the adjusting device (2), and the adjusting device (2) is arranged on the main shaft (1) and can rotate together with the rotation of the main shaft (1). One end of the main shaft (1) is provided with a connecting flange for connecting a power device that provides rotation externally, and the other end is a cylindrical connecting part (4) and is movably connected to an external device; The adjusting device (2) includes an adjusting component (2a), an upper slide plate component (2b), a lower slide plate component (2c) and a pull plate component (2d). The adjusting component (2a) is movably arranged on the connecting part (4). One end of the pull plate component (2d) is connected to the adjusting component (2a), and the other end is movably connected to the upper slide plate component (2b) and the lower slide plate component (2c); The upper slide plate component (2b) includes a set of upper slide side plates (2ba) symmetrically arranged left and right and an upper top plate (2bb) fixedly connected to the set of upper slide side plates (2ba). The upper top plate (2bb) is provided with a top column. A cylindrical hole is provided on the main shaft (1), and the top column can slide up and down in the cylindrical hole. A slide plate connecting part (2bc) is provided on the side of the upper slide side plate (2ba). A first waist-shaped hole is provided on the slide plate connecting part (2bc), and the first waist-shaped hole (2bd) is inclined; The lower slide plate component (2c) includes a set of lower slide side plates (2ca) symmetrically arranged left and right and a lower top plate (2cb) fixedly connected to the set of lower slide side plates (2ca). The lower top plate (2cb) is also provided with a top column, and a cylindrical hole movably connected to the top column is also provided on the main shaft (1) on the same side. A connecting groove (2cc) is provided on the side of the lower slide side plate (2ca), and the external dimension of the connecting groove (2cc) matches the external dimension of the slide plate connecting part (2bc). The two can piece together the upper slide side plate (2ba) and the lower slide side plate (2ca) into a structure similar to a rectangle. A second waist-shaped hole (2cd) is provided on the lower slide side plate (2ca), and the second waist-shaped hole (2cd) is inclined and the inclination direction is opposite to the inclination direction of the first waist-shaped hole (2bd); The pull plate assembly includes a set of pull plates (2da) symmetrically arranged left and right in (2d). A first pulling assembly (2db) and a second pulling assembly (2dc) are provided on the pull plate (2da). The first pulling assembly (2db) includes a set of first rollers (2dba) and first pin bolts (2dbb). Each of the first rollers (2dba) is arranged on the pull plate (2da) through the first pin bolt (2dbb). And one first pulling assembly (2db) is provided in each of the first waist-shaped holes (2bd). The outer wall of the first roller (2dba) contacts the inner side surface of the first waist-shaped hole (2bd). The second pulling assembly (2dc) includes a set of second rollers (2dca) and second pin bolts (2dcb). The second rollers (2dca) are arranged on the pull plate (2da) through the second pin bolts (2dcb). And one second pulling assembly (2dc) is provided in each of the second waist-shaped holes (2cd). The outer wall of the second roller (2dca) contacts the inner side surface of the second waist-shaped hole (2cd). The adjusting device (2) further includes a set of outer fixing plates (2e) symmetrically arranged left and right. The outer fixing plates (2e) are arranged on the outer sides of the upper slide plate assembly (2b) and the lower slide plate assembly (2c), and are simultaneously connected to the first pin bolt (2dbb) and the second pin bolt (2dcb).

2. The universal mold for manufacturing transformer coils according to claim 1, characterized in that: Threads are provided on the connecting portion (4). The adjusting assembly (2a) includes an adjusting nut (2aa), a sliding sleeve (2ab), and a flange sleeve (2ac). The adjusting nut (2aa) is connected to the connecting portion (4) by means of threaded connection. The adjusting nut (2aa) is sleeved in the flange sleeve (2ac) and is movably connected to the flange sleeve (2ac). The other end of the flange sleeve (2ac) is fixedly connected to one end of the sliding sleeve (2ab). The sliding sleeve (2ab) is movably arranged on the connecting portion (4).

3. The universal mold for manufacturing transformer coils according to claim 2, wherein: A first groove (2ad) is provided on the adjusting nut (2aa). And a second groove (2ae) symmetrically arranged with the first groove (2ad) is provided on the inner side surface of the flange sleeve (2ac). A plurality of balls (2af) are provided in the first groove (2ad) and the second groove (2ae).

4. The universal mold for manufacturing transformer coils according to claim 3, characterized in that: At least one set of the first groove (2ad) and the second groove (2ae) is provided. A ball mounting hole (2ah) is provided on the flange plate. And the number of the ball mounting holes (2ah) is the same as that of the second grooves (2ae).

5. The universal mold for producing transformer coils according to claim 3, characterized in that: Both side surfaces of the sliding sleeve (2ab) are fixedly connected to one end of a set of pull plates (2da), providing thrust or pull force for the pull plates (2da).

6. The universal mold for manufacturing transformer coils according to claim 1, wherein: A plurality of the first waist-shaped holes (2bd) and the second waist-shaped holes (2cd) are provided, and are evenly arranged on the pull plate (2da).

7. The universal mold for manufacturing transformer coils according to claim 1, wherein: There are two of the top covers (3), which are symmetrically arranged up and down, and the two top covers (3) are respectively connected to the upper top plate (2bb) and the lower top plate (2cb).

8. The universal mold for manufacturing transformer coils according to claim 1, wherein: Grooves (5) are also provided on both sides of the main shaft (1), and the two tension plates (2da) are respectively arranged in the two grooves (5).

9. The universal mold for manufacturing transformer coils according to claim 1, wherein: A scale sticker (6) is also provided on the tension plate (2da).

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