Transformer framework

Abstract

The invention relates to the technical field of transformers, and discloses a transformer framework, which comprises a framework body comprising a central part and an isolation part, the central part is provided with an insertion hole for inserting a transformer magnetic core; the number of the isolation parts is multiple, each isolation part surrounds the peripheral side of the center part, and the multiple isolation parts are distributed on the center part at intervals along the inserting path of the transformer magnetic core; wherein a winding groove for winding a primary winding and / or a secondary winding coil of the transformer is formed between every two adjacent isolation parts. The heat dissipation capability of the transformer can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of transformers, and in particular to a transformer skeleton. Background Art

[0002] The transformer skeleton is an important component of the transformer, mainly used to support and fix the coil. Most of the existing transformer skeletons are single-layer designs, such as the Chinese patent document with publication number CN203415381U, which discloses a transformer skeleton and a transformer, wherein the winding part on the transformer skeleton is arranged between the primary connecting plate and the secondary connecting plate, and the middle of the winding part has an inner cavity for placing the magnetic core.

[0003] The coil of the transformer needs to be stacked one by one when it is wound on the winding part, and the inner and outer layers are isolated by insulating materials, which makes the heat dissipation of the coil located in the inner circle poor, which is not conducive to improving the service life of the transformer. Summary of the invention

[0004] In order to improve the heat dissipation capacity of a transformer, the present application provides a transformer frame.

[0005] The present application provides a transformer skeleton, which adopts the following technical solution: A transformer skeleton comprises: a skeleton body, comprising a central part and an isolating part; the central part has an insertion hole for inserting a transformer core; there are multiple isolating parts, each of which is surrounded by the central part, and multiple isolating parts are distributed on the central part at intervals along the transformer core insertion path; wherein winding slots for winding the primary winding and / or secondary winding coils of the transformer are formed between adjacent isolating parts.

[0006] By adopting the above technical solution, multiple winding slots are formed by surrounding the central part with multiple isolation parts, so that the primary winding and / or secondary winding coils of the transformer can be wound in layers, thereby improving the stacking method of the coils, improving the heat dissipation performance between the coils, and improving the problem of shortened life of the inner coils due to poor heat dissipation, thereby improving the overall service life and performance stability of the transformer, and improving the capacity and efficiency of the transformer.

[0007] Optionally, the transformer skeleton further comprises a copper sheet, wherein there are a plurality of the copper sheets, the copper sheets can be used as the primary winding or the secondary winding of the transformer, and each of the isolation parts has the copper sheet; Each of the copper sheets includes a surrounding portion and a lead-out portion; the surrounding portion is pre-buried in the isolation portion, and the surrounding portion also encloses the central portion; the lead-out portions have two and are both connected to the surrounding portion, and the two lead-out portions extend to the outside of the isolation portion, and there is a partition fracture between the surrounding portion and the two lead-out portions.

[0008] By adopting the above technical solution, the copper sheet is used as the winding and is directly pre-buried in the isolation part, which not only simplifies the coil winding process, but also improves the integration and structural strength of the winding. The surrounding part encloses the central part to improve the concentration of the magnetic field, and the setting of the lead-out part facilitates connection with the external circuit.

[0009] Optionally, at least one lead-out portion on the copper sheet is opposite to the lead-out portion of an adjacent copper sheet.

[0010] By adopting the above technical solution, at least one lead-out portion is opposite to the lead-out portion of the adjacent copper sheet, which optimizes the connection layout between the windings, facilitates subsequent electrical connection and insulation treatment, reduces wiring complexity and cost, and is also beneficial to improving the overall compactness and aesthetics of the transformer.

[0011] Optionally, all the copper sheets are divided into two copper sheet groups, the copper sheets in the two copper sheet groups correspond to each other one by one, and the two corresponding copper sheets are mirror-symmetrical along the perpendicular bisector of the axis of the central part; In two adjacent copper sheets of the same copper sheet group, one lead-out portion on one of the copper sheets is opposite to one lead-out portion on the other copper sheet, and the other lead-out portion on one of the copper sheets is offset from the other lead-out portion on the other copper sheet.

[0012] By adopting the above technical solution, the copper sheets are grouped and arranged in a mirror-symmetrical manner along the perpendicular bisector of the central axis. The lead-out parts of adjacent copper sheets in the same group are designed to be relative and staggered. This layout not only balances the electromagnetic force between the windings, but also simplifies the connection path, reduces electromagnetic interference, and improves the electromagnetic compatibility and operating stability of the transformer.

[0013] Optionally, the peripheral side of the isolation portion has a notch for exposing the surrounding portion.

[0014] By adopting the above technical solution, a notch is set on the side of the isolation part to expose the surrounding part, which is convenient for checking and confirming the embedded position and status of the copper sheet, and also provides convenience for subsequent processing and debugging, improves the maintainability and production efficiency of the transformer, and can improve the heat dissipation capacity of the copper sheet.

[0015] Optionally, a lead groove is formed on the periphery of each of the isolation portions, and the lead groove is used for the conductor of the transformer winding coil to enter.

[0016] By adopting the above technical solution, a lead groove is set on the isolation part, which provides a set path for the wires of the transformer winding coil, reduces the confusion and crossing of the wires, improves the neatness and electrical safety of the winding, and also helps to reduce the volume and weight of the transformer and improve space utilization.

[0017] Optionally, the isolation portion has a wire pressing mechanism opposite to the wire guide groove, and the wire pressing mechanism includes A base, disposed on the isolation portion and located on one side of the lead groove; A conveyor belt, conveyed in the base; A pressing bar connected to the conveyor belt, driven by the conveyor belt to move on the base, and capable of moving into the lead groove to press against the conductor of the transformer winding coil; and An adjusting member is installed in the base and connected to the conveyor belt, and is used to drive the conveyor belt to adjust the position of the pressure strip.

[0018] By adopting the above technical solution, the conveyor belt drives the pressing bar to move to the lead groove to press the wire, thereby pressing the wire tightly and improving the stability and reliability of the winding. At the same time, the design of the adjustment part makes the pressing force adjustable to adapt to wires of different specifications and materials, thereby enhancing the applicability and flexibility of the transformer.

[0019] Optionally, the adjusting member includes The adjusting shaft comprises an adjusting section and a threaded section which are coaxially connected, wherein the threaded section is threadedly connected to the base along the height direction of the guide groove, and a guide groove is spirally formed on the outer wall of the adjusting section along its own axial direction; A connecting piece connected to the conveyor belt and sleeved on the outer wall of the adjusting section, and the inner wall of the connecting piece has a guide protrusion that presses into the guide groove; and The limiting shaft is arranged in the base and is parallel to the adjusting shaft. The connecting piece slides axially along the limiting shaft and is sleeved in the limiting shaft.

[0020] By adopting the above technical solution, the position of the pressure strip can be accurately adjusted by rotating the adjustment shaft, which is easy to operate and accurate in positioning.

[0021] Optionally, the skeleton body is integrally injection-molded from insulating material.

[0022] By adopting the above technical solution, the frame body is integrally molded with insulating materials, which improves the insulation performance and overall strength of the frame, reduces the number of parts and assembly procedures, and reduces production costs and cycles. At the same time, the one-piece molding design also helps to improve the sealing and corrosion resistance of the frame, extending the service life of the transformer.

[0023] In summary, the present application includes at least one of the following beneficial effects: 1. Multi-layer winding slots are formed by the cooperation between the isolation part and the central part, so that the winding coils can be wound in layers, thereby increasing the heat dissipation area, increasing the heat dissipation capacity of the transformer, and improving the problem of shortened life of the inner coil due to poor heat dissipation.

[0024] 2. The copper sheet is pre-buried in the isolation part, which not only simplifies the coil winding process, but also supports the skeleton body, improves the structural strength of the transformer skeleton, and by selecting the number of copper sheets in series and the number of turns of the coil, the output voltage and current can be adjusted according to demand, which is flexibly applicable to a variety of power conversion; 3. The wire in the lead groove is pressed by the pressing strip in the wire pressing mechanism to improve the stability and reliability of the winding. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of Embodiment 1 of the present application; Figure 2 is a front view of the first embodiment of the present application; Figure 3 This is a schematic diagram of the exploded structure of a group of copper sheets in an embodiment of the present application; Figure 4 It is a structural diagram of Embodiment 2 of the present application; Figure 5 yes Figure 4 A schematic diagram of the enlarged structure at A in the middle; Figure 6 It is a structural schematic diagram of the wire pressing mechanism in the second embodiment of the present application; Figure 7 It is a schematic diagram of the structure of the connecting piece in the second embodiment of the present application.

[0026] Explanation of the reference numerals: 1. Skeleton body; 101. Center portion; 102. Isolation portion; 2. Winding slot; 3. Copper sheet; 31. Surrounding portion; 32. Lead-out portion; 4. Fracture; 5. Notch; 6. Lead-in slot; 7. Wire pressing mechanism; 71. Base; 72. Conveyor belt; 73. Pressure strip; 74. Adjusting member; 741. Adjusting shaft; 7411. Adjusting section; 7412. Threaded section; 742. Connecting piece; 743. Limiting shaft; 8. Guide slot; 9. Guide cam; 10. First piece; 11. Second piece; 12. Support shaft; 13. Clearance slot; 14. Socket. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-Figure 7 This application is described in further detail.

[0028] Embodiment 1:

[0029] The present application embodiment discloses a transformer skeleton. Figure 1 The transformer skeleton includes a skeleton body 1 and a copper sheet 3. The skeleton body 1 is integrally injection-molded from an insulating material. The copper sheet 3 is pre-embedded in the skeleton body 1 during the injection molding of the skeleton body 1 to be formed together with the skeleton body 1.

[0030] Reference Figure 1and Figure 2 The skeleton body 1 includes a central portion 101 and an isolation portion 102. The central portion 101 is cylindrical and has a plug hole 14 coaxially penetrating its two opposite ends along its own axis. When the transformer is assembled, the magnetic core of the transformer is inserted into the plug hole 14 from both ends of the central portion 101 to assemble the skeleton and the magnetic core.

[0031] There are multiple isolating parts 102, and the multiple isolating parts 102 are uniformly spaced and formed on the outer periphery of the central part 101 along the axial direction of the central part 101, and the multiple isolating parts 102 overlap in the axial direction of the central part 101. Each isolating part 102 is in the shape of an annular sheet with a plate surface perpendicular to the axis of the central part 101, and the isolating parts 102 are enclosed on the central part 101, so that winding slots 2 are formed between each adjacent isolating part 102 and the outer periphery of the central part 101, so that the multiple winding slots 2 are distributed in sequence along the axial direction of the central part 101.

[0032] Reference Figure 1 and Figure 3 There are multiple copper sheets 3, each of the isolation parts 102 has at least one copper sheet 3, and each copper sheet 3 includes a surrounding part 31 and a lead-out part 32. The surrounding part 31 is arc-shaped, and the surrounding part 31 is pre-buried in the isolation part 102, and the surrounding part 31 coaxially surrounds the central part 101, and the starting and ending ends of the surrounding part 31 are close to each other and a fracture 4 is formed therebetween to limit the contact between the two ends of the surrounding part 31.

[0033] The lead-out portion 32 is in the shape of a sheet, and there are two lead-out portions 32 on each copper sheet 3. The two lead-out portions 32 are respectively connected to the two ends of the surrounding portion 31. At the same time, the two lead-out portions 32 are parallel to each other and both extend downward to the outside of the isolation portion 102. The width of the lead-out portion 32 at one end away from the isolation portion 102 is smaller than the width of the lead-out portion 32 at one end close to the isolation portion 102.

[0034] When the transformer is in use, the lead-out portion 32 serves as the pin of the transformer, and the lead-out portion 32 is plugged or connected to the PCB board for installation and conduction. When the transformer is assembled, the primary winding coil can be wound in all the winding slots 2, and the number of turns of the primary winding can be adjusted by adjusting the number of coil turns, and the copper sheet 3 is used as the secondary winding at this time, and the lead-out portions 32 of different copper sheets 3 are connected so that the copper sheets 3 can be connected in series, and the number of turns of the secondary winding can be adjusted by adjusting the number of copper sheets 3 connected in series. When the transformer is assembled, the secondary winding coil can also be wound in all the winding slots 2, and the copper sheet 3 is used as the primary winding. In addition, the primary coil can be wound in a part of the winding slots 2, and the secondary coil can be wound in a part of the winding slots 2, and the lead-out portion 32 of the copper sheet 3 is used as the connection point of the flying wire of the winding coil to make the coil conductive.

[0035] When the winding coil is being wound, after the conductor of the winding coil is wound into a coil in one winding slot 2, it can be introduced into another winding slot 2 to continue winding, and the isolation portion 102 isolates the coils in the two winding slots 2 to reduce heat transfer. At the same time, the isolation portion 102 forms heat dissipation surfaces on the opposite sides of the two winding slots 2, and each winding slot 2 is connected to the external environment of the skeleton body 1, thereby increasing the heat dissipation area of ​​the transformer and improving the heat dissipation capacity of the transformer.

[0036] Reference Figure 1 and Figure 2 Furthermore, a notch 5 exposing the outer periphery of the surrounding portion 31 is formed on the outer periphery of the isolation portion 102. The notch 5 is formed when the skeleton body 1 is injected and multiple notches 5 are arranged along the circumference of the isolation portion 102 to increase the portion of the copper sheet 3 connected to the external environment and improve the heat dissipation capacity of the copper sheet 3. The exposed portion of the surrounding portion 31 is far away from the central portion 101, so it is not easy to interfere with the winding coil.

[0037] Reference Figure 1 and Figure 3 , further, at least one lead-out portion 32 on the copper sheet 3 is opposite to the lead-out portion 32 of the adjacent copper sheet 3, so as to facilitate connecting the lead-out portions 32 of the adjacent copper sheets 3 in series. Specifically, the number of copper sheets 3 is an even number. In this embodiment, all copper sheets 3 are divided into two groups of copper sheets, and the two groups of copper sheets are distributed axially along the central portion 101, and the number of copper sheets 3 in the two groups of copper sheets is the same. The copper sheets 3 in the two groups of copper sheets correspond to each other one by one, and the corresponding two copper sheets 3 have the same shape and size, and the corresponding two copper sheets 3 are mirror-symmetrical along the perpendicular bisector of the axis of the central portion 101.

[0038] Reference Figure 3 , wherein, in the same copper sheet group, the positions of the lead-out portions 32 on different copper sheets 3 relative to the surrounding portion 31 are all different, the lead-out portions 32 on the copper sheet 3 far from the perpendicular midline of the axis of the central portion 101 are close to one side edge of the isolation portion 102, and the lead-out portions 32 on the copper sheet 3 close to the perpendicular midline of the axis of the central portion 101 are close to the edge on the other side of the isolation portion 102, so that the lead-out portions 32 of different copper sheets 3 in the same group have staggered portions.

[0039] Reference Figure 1 and Figure 3Specifically, taking two adjacent copper sheets 3 in the same copper sheet group as an example, the two copper sheets 3 are defined as the first sheet 10 and the second sheet 11 respectively, one of the lead-out portions 32 on the first sheet 10 and one of the lead-out portions 32 on the second sheet 11 are opposite and overlapped in the axial direction of the center portion 101, and the other lead-out portion 32 on the first sheet 10 and the other lead-out portion 32 on the second sheet 11 are respectively located on both sides of the relative lead-out portion 32, so that the two are misaligned with each other. Therefore, when the adjacent copper sheets 3 are connected in series, the relative lead-out portions 32 on the adjacent copper sheets 3 can be connected, so that the connection between the copper sheets 3 is more convenient and clear. And the isolation portion 102 corresponding to the first sheet 10 does not block the misaligned lead-out portion 32 of the second sheet 11, and the isolation portion 102 corresponding to the second sheet 11 does not block the misaligned lead-out portion 32 of the first sheet 10, so as to provide an operating space when connecting the lead-out portions 32.

[0040] Reference Figure 1 and Figure 2 Furthermore, a lead groove 6 is formed on the top side of each isolation part 102 away from the lead part, and two lead grooves 6 are provided on the top side of the isolation part 102, and the two lead grooves 6 are respectively located on the two sides of the isolation part 102 away from each other. The lead groove 6 is used for the wire of the winding coil to be inserted when crossing the isolation part 102, so as to improve the stability of the wire and prevent the wire from being easily displaced when crossing the isolation part 102 to affect the guiding winding effect.

[0041] In this embodiment, there are five isolating parts 102 and six copper sheets 3. Two copper sheets 3 are embedded in the isolating part 102 in the middle, and one copper sheet 3 is embedded in each of the other isolating parts 102. There is a gap between the two copper sheets 3 in the middle isolating part 102 and the gap is filled with insulating material during injection molding to isolate each other. In other embodiments, the isolating parts 102 can also be an odd number such as three or seven, the number of copper sheets 3 is one more than the isolating parts 102, and there are two copper sheets 3 in the isolating part 102 in the middle, and one copper sheet 3 is embedded in each of the other isolating parts 102.

[0042] The implementation principle of a transformer skeleton in an embodiment of the present application is as follows: when the transformer skeleton is in use, the isolation portion 102 isolates the winding coil into a multi-layer structure, the wire of the winding coil crosses the isolation portion 102 from the lead groove 6, and the copper sheet 3 is plugged into the PCB board.

[0043] Embodiment 2:

[0044] The difference between the embodiment of the present application and the embodiment 1 is that, Figure 4 The embodiment of the present application also includes a wire pressing mechanism 7 for pressing the wire in the lead groove 6.

[0045] Reference Figure 5 and Figure 6Specifically, the wire pressing mechanism 7 includes a base 71, a conveyor belt 72, a pressing strip 73 and an adjusting member 74. The wire pressing mechanism 7 is assembled before the frame body 1 is injected and placed in the injection mold of the frame body 1, so as to be fixed together with the isolation part 102 during the injection molding of the frame body 1.

[0046] The base 71 is fixed on the isolation part 102 and corresponds to the lead groove 6 one by one, and one side of the base 71 serves as the inner side wall of one side of the lead groove 6. The base 71 is hollow inside, and two mutually parallel support shafts 12 are fixed inside the base 71, and the axial direction of the support shaft 12 is parallel to the axial direction of the center part 101, and the distribution direction of the two support shafts 12 is parallel to the height direction of the lead groove 6.

[0047] The conveyor belt 72 corresponds to the base 71 one by one. The conveyor belt 72 is located in the inner cavity of the base 71 and is simultaneously sleeved on the two support shafts 12 in the base 71, and can be transported on the support shafts 12. The pressing strip 73 is in the shape of a rectangular strip, one end of which is fixed on the conveyor belt 72, and the length extension direction of the pressing strip 73 is perpendicular to the axial direction of the support shaft 12. The base 71 is provided with a clearance groove 13 for the pressing strip 73 to extend and move with the conveyor belt 72, and the clearance groove 13 is connected to the inner cavity of the base 71.

[0048] Reference Figure 5 and Figure 6 The adjusting member 74 includes an adjusting shaft 741, a connecting piece 742 and a limiting shaft 743. The adjusting shaft 741 is in the shape of a circular shaft, and includes an adjusting section 7411 and a threaded section 7412 that are coaxially fixedly connected. The threaded section 7412 is threadedly connected to the bottom of the base 71 along the distribution direction of the two supporting shafts 12. The adjusting section 7411 is located in the inner cavity of the base 71. One end of the adjusting section 7411 away from the threaded section 7412 extends away from the center 101 and is disposed outside the base 71. At the same time, the end of the adjusting section 7411 away from the threaded section 7412 has a handle. The limiting shaft 743 is fixed on the base 71 and is located in the inner cavity of the base 71, and the axis of the limiting shaft 743 is parallel to the axis of the adjusting shaft 741.

[0049] Reference Figure 6 and Figure 7The connecting piece 742 is in the shape of a square sheet, and is fixed on the conveyor belt 72. The connecting piece 742 is also sleeved on the outer wall of the adjustment section 7411 and the outer wall of the limiting shaft 743. The connecting piece 742 can slide on the adjustment section 7411 and the limiting shaft 743 in a direction parallel to the axial direction of the adjustment section 7411, so as to drive the conveyor belt 72 to transport. It should be noted that a guide protrusion 9 is fixed on the inner wall of the connecting piece 742 opposite to the adjustment section 7411. The guide protrusion 9 is in the shape of a convex column, and a guide groove 8 is provided on the outer peripheral wall of the adjustment section 7411 for the guide protrusion 9 to press into and slide. The guide groove 8 is spirally provided on the outer peripheral wall of the adjustment section 7411 along the axial direction of the adjustment section 7411, and the pitch of the guide groove 8 is greater than the pitch of the threaded section 7412.

[0050] Reference Figure 5 , Figure 6 and Figure 7 When the guide protrusion 9 abuts against one end of the guide groove 8 close to the threaded section 7412, the pressing strip 73 is located outside the lead groove 6, and the length extension direction of the pressing strip 73 is parallel to the distribution direction of the two support shafts 12. At this time, the pressing strip 73 does not interfere with the wire in the lead groove 6, and the operator can push the wire into the lead groove 6. Then, the adjusting shaft 741 is threaded downward to move the guide protrusion 9 upward relative to the adjusting section 7411, so as to drive the connecting piece 742 to move upward, so as to make the conveyor belt 72 convey and drive the pressing strip 73 to move into the lead groove 6, so that the pressing strip 73 presses down the wire in the lead groove 6, so as to further limit the wire and improve the stability of the wire in the lead groove 6.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A transformer skeleton, characterized in that: include: A skeleton body (1) comprises a central portion (101) and an isolating portion (102); the central portion (101) has an insertion hole (14) for inserting a transformer core; the isolating portion (102) has a plurality of portions, each of the isolating portions (102) is surrounded by the central portion (101), and the plurality of isolating portions (102) are distributed on the central portion (101) at intervals along the transformer core insertion path; wherein winding slots (2) for winding the primary winding and / or secondary winding coils of the transformer are formed between adjacent isolating portions (102).

2. A transformer skeleton according to claim 1, characterized in that: The transformer skeleton also includes a copper sheet (3), a plurality of the copper sheets (3) are provided, the copper sheets (3) can be used as a primary winding or a secondary winding of the transformer, and each of the isolation parts (102) has the copper sheet (3); Each of the copper sheets (3) comprises a surrounding portion (31) and a lead-out portion (32); the surrounding portion (31) is pre-buried in the isolation portion (102), and the surrounding portion (31) simultaneously surrounds the central portion (101); the lead-out portion (32) has two leads, both connected to the surrounding portion (31), and both of the two lead-out portions (32) extend to the outside of the isolation portion (102), and a partitioning fracture (4) is provided between the surrounding portion (31) and the two lead-out portions (32).

3. A transformer skeleton according to claim 2, characterized in that: At least one lead-out portion (32) on the copper sheet (3) is opposite to the lead-out portion (32) of an adjacent copper sheet (3).

4. A transformer skeleton according to claim 3, characterized in that: All the copper sheets (3) are divided into two groups of copper sheets (3), the copper sheets (3) in the two groups of copper sheets (3) correspond to each other one by one, and the two corresponding copper sheets (3) are mirror-symmetrical along the perpendicular midline of the axis of the central part (101); In two adjacent copper sheets (3) of the same copper sheet (3) group, one lead-out portion (32) on one of the copper sheets (3) is opposite to one lead-out portion (32) on the other copper sheet (3), and another lead-out portion (32) on one of the copper sheets (3) is offset from another lead-out portion (32) on the other copper sheet (3).

5. A transformer skeleton according to claim 2, characterized in that: The peripheral side of the isolation portion (102) has a notch (5) for exposing the surrounding portion (31).

6. A transformer skeleton according to claim 1, characterized in that: A lead wire groove (6) is formed on the circumferential side of each of the isolation portions (102), and the lead wire groove (6) is used for the conductor of the transformer winding coil to enter.

7. A transformer skeleton according to claim 6, characterized in that: The isolation portion (102) is provided with a wire pressing mechanism (7) opposite to the wire guide groove (6), and the wire pressing mechanism (7) comprises A base (71) is arranged on the isolation portion (102) and is located on one side of the lead groove (6); A conveyor belt (72) conveying in the base (71); a pressing bar (73) connected to the conveyor belt (72), driven by the conveyor belt (72) to move on the base (71), and capable of moving into the lead groove (6) to press against the conductor of the transformer winding coil; and An adjusting member (74) is installed in the base (71) and connected to the conveyor belt (72), and is used to drive the conveyor belt (72) to adjust the position of the pressing strip (73).

8. A transformer skeleton according to claim 7, characterized in that: The adjusting member (74) comprises An adjusting shaft (741) comprises an adjusting section (7411) and a threaded section (7412) which are coaxially connected, wherein the threaded section (7412) is threadedly connected to the base (71) along the height direction of the guide groove (6), and a guide groove (8) is formed on the outer wall of the adjusting section (7411) along its own axial direction in a spiral manner; A connecting piece (742) connected to the conveyor belt (72) and sleeved on the outer wall of the adjusting section (7411), and having a guide protrusion (9) on the inner wall of the connecting piece (742) that presses into the guide groove (8); and The limiting shaft (743) is arranged in the base (71) and is parallel to the adjusting shaft (741), and the connecting piece (742) simultaneously slides axially along the limiting shaft (743) and is sleeved in the limiting shaft (743).

9. The transformer skeleton according to claim 1, characterized in that: The skeleton body (1) is integrally injection-molded from insulating material.

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