Magnetic core fixing device and transformer

Abstract

The utility model belongs to the technical field of transformers, and discloses a magnetic core fixing device and a transformer. The magnetic core fixing device comprises a magnetic core assembly and a coil support, the magnetic core assembly comprises a first magnetic core and a second magnetic core, a through hole is formed in the coil support in the axis direction of the coil support, a first limiting groove and a second limiting groove are formed in the two ends of the coil support respectively, the first magnetic core is embedded in the first limiting groove, and at least part of the first magnetic core penetrates through the through hole. The second magnetic core is embedded in the second limiting groove, and at least part of the second magnetic core penetrates through the through hole and is connected with the first magnetic core; the first limiting groove and the second limiting groove are respectively used for limiting the first magnetic core and the second magnetic core to rotate along the circumferential direction of the coil bracket; the through holes are used for limiting the first magnetic core and the second magnetic core to move in the radial direction of the coil support, so that it is ensured that the relative positions of the coil and the magnetic core assembly are fixed, and the safety and reliability of the transformer are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to a magnetic core fixing device and a transformer. Background Art

[0002] The magnetic core and coil of the transformer are key components. The stability of the magnetic core relative to the coil has an important impact on the performance of the transformer. Currently, the methods for fixing the magnetic core on the market include wire binding, bonding, and expansion methods.

[0003] The wire binding method uses steel wire to bind the magnetic core to the coil frame so that the magnetic core and the coil frame are relatively fixed, but the fixing effect is not good and the magnetic core is prone to loosening; the gluing method refers to gluing the magnetic core to the coil frame only by glue or double-sided tape, but special glue or double-sided tape is required. As the transformer is used for a long time, the glue is prone to aging and the viscosity is weakened, causing the magnetic core to fall off; the expansion method requires using a mold to process the hole of the transformer component into a taper, then apply an expansion agent on the magnetic core, place it in the hole and knock it to expand the bottom of the magnetic core, thereby fixing the magnetic core. The magnetic core installation process is relatively complicated.

[0004] Therefore, there is an urgent need for a magnetic core fixing device and a transformer to solve the problems in the prior art. Utility Model Content

[0005] The utility model aims to provide a magnetic core fixing device with a simple structure, which reduces production costs and improves production efficiency.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A magnetic core fixing device, comprising:

[0008] A magnetic core assembly, comprising a first magnetic core and a second magnetic core;

[0009] A coil bracket, wherein a through hole is provided in the coil bracket along the axial direction of the coil bracket, a first limiting groove and a second limiting groove are respectively provided at both ends of the coil bracket, the first magnetic core is embedded in the first limiting groove, and at least a part of the first magnetic core is passed through the through hole, and the second magnetic core is embedded in the second limiting groove, and at least a part of the second magnetic core is passed through the through hole to connect with the first magnetic core;

[0010] The first limiting groove and the second limiting groove are respectively configured to limit the first magnetic core and the second magnetic core from rotating along the circumferential direction of the coil support; the through hole is configured to limit the first magnetic core and the second magnetic core from moving along the radial direction of the coil support.

[0011] Optionally, the first magnetic core includes a first plate and a first magnetic column, the first plate is limited in the first limiting groove, and the first magnetic column is passed through the through hole;

[0012] The second magnetic core includes a second plate and a second magnetic column. The second plate is limited in the second limiting groove. The second magnetic column passes through the through hole and is connected to the first magnetic column.

[0013] Optionally, the diameter of the first magnetic column and the diameter of the second magnetic column are both equal to the diameter of the through hole.

[0014] Optionally, the first magnetic core also includes two first side plates, which are relatively arranged on the first plate and are respectively located on both sides of the first magnetic column; the second magnetic core includes two second side plates, which are relatively arranged on the second plate and are respectively located on both sides of the second magnetic column; the first side plates can be connected to their corresponding second side plates.

[0015] Optionally, the magnetic core fixing device further comprises an insulator, the insulator is provided with an assembly hole, the coil bracket is passed through the assembly hole, and both ends of the coil bracket are respectively limited on the insulator.

[0016] Optionally, the coil bracket includes a bracket body and a bracket end cover, one end of the bracket body is passed through the assembly hole, and the other end is limited to the first end of the insulator, one end of the bracket end cover is passed through the assembly hole and connected to the bracket body, and the other end is limited to the second end of the insulator.

[0017] Optionally, the bracket body includes a first annular segment and a second annular segment arranged in sequence, the diameter of the second annular segment is smaller than the diameter of the first annular segment to form a first limiting surface, the outer peripheral surface of the second annular segment abuts against the inner wall of the assembly hole, and the first limiting surface is attached to the end surface of the first end of the insulator;

[0018] The bracket end cover includes a third annular segment and a fourth annular segment which are arranged in sequence, the diameter of the fourth annular segment is smaller than the diameter of the third annular segment to form a second limiting surface, the outer peripheral surface of the fourth annular segment abuts against the inner wall of the assembly hole, and the second limiting surface is attached to the end surface of the second end of the insulator.

[0019] Optionally, the bracket body also includes a fifth ring segment, which is connected to the end of the second ring segment facing away from the first ring segment, the diameter of the fifth ring segment is smaller than the diameter of the second ring segment to form a third limiting surface, the fifth ring segment is detachably connected to the fourth ring segment, the end face of the fourth ring segment, the fifth ring segment and the third limiting surface are jointly arranged to form the annular groove, and the annular groove is used to accommodate the coil.

[0020] Optionally, an inserting portion is provided at one end of the fifth annular segment facing away from the second annular segment, an inserting groove is provided in the fourth annular segment, and the inserting portion is interference fitted in the inserting groove;

[0021] Alternatively, the plug-in portion is provided with an external thread, the inner wall of the plug-in slot is provided with an internal thread, and the external thread is screwed and connected to the internal thread.

[0022] Optionally, the plug-in portion is an annular plug-in portion, and the plug-in groove is an annular plug-in groove. The diameter of the annular plug-in portion is smaller than the diameter of the fifth annular segment to form a fourth limiting surface. When the annular plug-in portion is assembled in the annular plug-in groove, the fourth limiting surface can abut against the end face of the fourth annular segment.

[0023] Optionally, the bracket body and / or the bracket end cover are provided with a protrusion, the insulator is provided with an anti-rotation groove corresponding to the protrusion, and the protrusion is inserted into the anti-rotation groove.

[0024] Optionally, the bracket body and / or the bracket end cover are provided with inlet and outlet wire grooves.

[0025] Another object of the utility model is to provide a transformer, which improves the stability of the coil and the magnetic core of the transformer.

[0026] To achieve this purpose, the utility model adopts the following technical solutions:

[0027] A transformer comprises a transformer housing and the above-mentioned magnetic core fixing device, wherein the magnetic core fixing device is arranged in the transformer housing.

[0028] Beneficial effects:

[0029] The magnetic core fixing device provided by the utility model comprises a magnetic core assembly and a coil support, the magnetic core assembly comprises a first magnetic core and a second magnetic core, a through hole is provided in the coil support along the axial direction of the coil support, a first limiting groove and a second limiting groove are respectively provided at two ends of the coil support, the first magnetic core is embedded in the first limiting groove, and at least a part of the first magnetic core is penetrated in the through hole, the second magnetic core is embedded in the second limiting groove, and at least a part of the second magnetic core is penetrated in the through hole and connected with the first magnetic core; the first limiting groove and the second limiting groove are respectively used to limit the first magnetic core and the second magnetic core from rotating along the circumferential direction of the coil support, the through hole is used to limit the first magnetic core and the second magnetic core from moving along the radial direction of the coil support, at least a part of the second magnetic core is penetrated in the through hole and connected with the first magnetic core, so as to limit the first magnetic core and the second magnetic core from moving along the axial direction of the coil support, thereby ensuring the relative position fixation of the coil and the magnetic core assembly, improving the safety and reliability of the transformer, the magnetic core fixing device has a simple structure, does not require special glue or expansion agent, and does not require complicated processing steps, reduces production costs and improves production efficiency.

[0030] The transformer provided by the utility model comprises a transformer housing and the above-mentioned magnetic core fixing device, wherein the magnetic core fixing device is arranged in the housing, thereby improving the stability of the coil and the magnetic core of the transformer; and the magnetic core fixing device is installed inside the transformer housing, and the transformer housing provides an additional external protective layer, which can effectively protect the magnetic core and the coil from being affected by the external environment, such as moisture, dust, etc., thereby extending the service life of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the magnetic core fixing device provided by the utility model;

[0032] Figure 2 It is a cross-sectional view of the magnetic core fixing device provided by the utility model;

[0033] Figure 3 This is a structural schematic diagram of the magnetic core fixing device provided by the utility model including an insulator;

[0034] Figure 4 This is a cross-sectional view of the magnetic core fixing device provided by the utility model including an insulator;

[0035] Figure 5 It is a structural schematic diagram of the coil support provided by the utility model;

[0036] Figure 6 It is an exploded view of the coil support provided by the utility model;

[0037] Figure 7 It is a cross-sectional view of the coil support provided by the utility model in an exploded state.

[0038] In the figure:

[0039] 100, magnetic core assembly; 110, first magnetic core; 111, first plate; 112, first magnetic column; 113, first side plate; 120, second magnetic core; 121, second plate; 122, second magnetic column; 123, second side plate;

[0040] 200, coil support; 201, first limiting groove; 202, second limiting groove; 203, through hole; 204, annular groove; 205, coil;

[0041] 210, bracket body; 211, first annular segment; 212, second annular segment; 213, first limiting surface; 214, fifth annular segment; 215, plug-in portion; 216, third limiting surface; 217, fourth limiting surface; 218, protrusion;

[0042] 220, bracket end cover; 221, third annular segment; 222, fourth annular segment; 2221, plug-in slot; 223, second limiting surface; 224, inlet and outlet slot;

[0043] 300, insulator; 301, assembly hole; 302, anti-rotation groove. DETAILED DESCRIPTION

[0044] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0045] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0047] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0048] This embodiment provides a magnetic core fixing device, such as Figure 1-Figure 2 As shown, the magnetic core fixing device includes a magnetic core component 100 and a coil support 200, the magnetic core component 100 includes a first magnetic core 110 and a second magnetic core 120, along the axial direction of the coil support 200, a through hole 203 is provided in the coil support 200, and the two ends of the coil support 200 are respectively provided with a first limiting groove 201 and a second limiting groove 202, the first magnetic core 110 is embedded in the first limiting groove 201, and at least a part of the first magnetic core 110 is penetrated through the through hole 203, the second magnetic core 120 is embedded in the second limiting groove 202, and at least a part of the second magnetic core 120 is penetrated through the through hole 203 and connected to the first magnetic core 110; the first limiting groove 201 and the second limiting groove 202 are respectively used to limit the first magnetic core 110 The core 110 and the second magnetic core 120 rotate along the circumferential direction of the coil support 200, and the through hole 203 is used to limit the movement of the first magnetic core 110 and the second magnetic core 120 along the radial direction of the coil support 200, and at least a portion of the second magnetic core 120 is inserted through the through hole 203 and connected to the first magnetic core 110 to limit the movement of the first magnetic core 110 and the second magnetic core 120 along the axial direction of the coil support 200, thereby ensuring that the relative position of the coil 205 and the magnetic core assembly 100 is fixed, thereby improving the safety and reliability of the transformer. The magnetic core fixing device has a simple structure, does not require special glue or expansion agents, and does not require complicated processing steps, thereby reducing production costs and improving production efficiency.

[0049] Optionally, the first magnetic core 110 includes a first plate 111 and a first magnetic column 112, the first plate 111 is limited to the first limiting groove 201, and the first magnetic column 112 is penetrated through the through hole 203; the second magnetic core 120 includes a second plate 121 and a second magnetic column 122, the second plate 121 is limited to the second limiting groove 202, and the second magnetic column 122 is penetrated through the through hole 203 and connected to the first magnetic column 112. The through hole 203 is arranged in the axial direction of the coil support 200, and limiting grooves are respectively arranged at both ends, so that the whole structure is more compact and space is effectively saved.

[0050] Optionally, in this embodiment, the first limiting groove 201 and the second limiting groove 202 are both strip limiting grooves, and the corresponding first plate 111 and the second plate 121 are both strip plates, which are limited in the strip grooves, thereby effectively limiting the rotation of the first magnetic core 110 and the second magnetic core 120 relative to the coil bracket 200.

[0051] Optionally, the diameter of the first magnetic column 112 and the diameter of the second magnetic column 122 are both equal to the diameter of the through hole 203 , which can effectively prevent the magnetic core assembly 100 from shaking and improve the stability of the magnetic core assembly 100 .

[0052] Optionally, the first magnetic core 110 further includes two first side plates 113, which are relatively arranged on the first plate 111 and are respectively located on both sides of the first magnetic column 112, and the second magnetic core 120 includes two second side plates 123, which are relatively arranged on the second plate 121 and are respectively located on both sides of the second magnetic column 122. The first side plate 113 can be connected to its corresponding second side plate 123, thereby improving the stability of the magnetic core assembly 100 and forming a closed magnetic circuit. The closed magnetic circuit allows the magnetic field to circulate freely in the magnetic core without being lost to the external environment in large quantities, thereby improving the magnetic coupling efficiency of the transformer and making the energy transfer more efficient. In addition, the closed magnetic circuit can also reduce the leakage magnetic induction of the transformer and reduce interference with the external environment and other devices.

[0053] Optionally, the first magnetic column 112 and the second magnetic column 122 are bonded, and the first side plate 113 and the second side plate 123 are bonded, and the overall stability of the magnetic core assembly 100 is further improved, thereby improving the performance and reliability of the transformer and extending its service life.

[0054] Alternatively, if Figure 3-Figure 4 As shown, the magnetic core fixing device further includes an insulator 300, on which an assembly hole 301 is provided, through which the coil support 200 is passed, and both ends of the coil support 200 are respectively limited on the insulator 300. By providing the insulator 300, not only support and fixation are provided for the coil support 200, but also electrical insulation is provided, which helps to improve the safety and reliability of the transformer.

[0055] Optionally, the coil support 200 includes a support body 210 and a support end cap 220, one end of the support body 210 is inserted into the assembly hole 301, and the other end is limited to the first end of the insulator 300, and one end of the support end cap 220 is inserted into the assembly hole 301 and connected to the support body 210, and the other end is limited to the second end of the insulator 300. By designing the coil support 200 in a split type, the steps of assembling the coil support 200 on the insulator 300 are simplified, and the assembly efficiency is improved.

[0056] Alternatively, if Figure 5-Figure 6 As shown, the bracket body 210 includes a first annular segment 211 and a second annular segment 212 which are arranged in sequence, the diameter of the second annular segment 212 is smaller than the diameter of the first annular segment 211 to form a first limiting surface 213, the outer circumferential surface of the second annular segment 212 abuts against the inner wall of the assembly hole 301, and the first limiting surface 213 is attached to the end surface of the first end of the insulator 300, thereby limiting the radial freedom and axial freedom of the bracket body 210 relative to the insulator 300; the bracket end cover 220 includes a third annular segment 221 and a fourth annular segment 222 which are arranged in sequence, the diameter of the fourth annular segment 222 is smaller than the diameter of the third annular segment 221 to form a second limiting surface 223, the outer circumferential surface of the fourth annular segment 222 abuts against the inner wall of the assembly hole 301, and the second limiting surface 223 is attached to the end surface of the second end of the insulator 300, thereby limiting the radial freedom and axial freedom of the bracket end cover 220 relative to the insulator 300. The above-mentioned structural setting provides a more precise and reliable limiting method for the support body 210 and the support end cover 220 , thereby ensuring the stability of the coil support 200 on the insulator 300 .

[0057] Alternatively, if Figure 6-Figure 7 As shown, in this embodiment, the first limiting groove 201 is arranged on the first annular segment 211 of the bracket body 210, the first plate 111 of the first magnetic core 110 is assembled in the first limiting groove 201, the second limiting groove 202 is arranged on the third annular segment 221 of the bracket end cover 220, and the second plate 121 of the second magnetic core 120 is assembled in the second limiting groove 202, so as to improve the assembly accuracy and stability of the magnetic core.

[0058] Optionally, the support body 210 further includes a fifth annular segment 214, which is connected to one end of the second annular segment 212 away from the first annular segment 211, and the diameter of the fifth annular segment 214 is smaller than the diameter of the second annular segment 212 to form a third limiting surface 216, and the fifth annular segment 214 is detachably connected to the fourth annular segment 222, and the end surface of the fourth annular segment 222, the fifth annular segment 214 and the third limiting surface 216 are jointly surrounded to form an annular groove 204, and the annular groove 204 accommodates the winding coil 205. The setting of the annular groove 204 can limit the length of the coil 205 wound on the coil support 200, improve the winding accuracy of the coil 205, and help improve the performance and stability of the transformer. The fifth annular segment 214 is detachably connected to the fourth annular segment 222, and this design makes the assembly of the support body 210 and the support end cover 220 more flexible and convenient, and can improve the disassembly efficiency of the coil support 200.

[0059] Alternatively, if Figure 5-Figure 7 As shown, a plug-in portion 215 is provided at one end of the fifth ring segment 214 away from the second ring segment 212, and a plug-in groove 2221 is provided in the fourth ring segment 222, and the plug-in portion 215 is interference fit in the plug-in groove 2221; the interference fit between the plug-in portion 215 and the plug-in groove 2221 ensures the firmness of the connection and prevents loosening or falling off due to vibration or impact during the operation of the transformer.

[0060] In other embodiments, the plug-in portion 215 is provided with an external thread, and the inner wall of the plug-in groove 2221 is provided with an internal thread. The external thread is screwed into the internal thread to form a tight threaded connection, thereby improving the reliability and stability of the connection between the bracket body 210 and the bracket end cover 220.

[0061] Optionally, the plug-in portion 215 is an annular plug-in portion 215, and the corresponding plug-in groove 2221 is an annular plug-in groove 2221. The diameter of the annular plug-in portion 215 is smaller than the diameter of the fifth annular segment 214 to form a fourth limiting surface 217. When the annular plug-in portion 215 is plugged into the annular plug-in groove 2221, the fourth limiting surface 217 abuts against the end surface of the fourth annular segment 222, thereby accurately limiting the position during the assembly process of the bracket body 210 and the bracket end cover 220 to prevent over-plugging, simplifying the transformer assembly process, and improving assembly efficiency.

[0062] Alternatively, if Figure 3 As shown, a protrusion 218 is provided on the bracket body 210, and an anti-rotation groove 302 is provided on the insulator 300 corresponding to the protrusion 218. The protrusion 218 is inserted into the anti-rotation groove 302, which can effectively prevent the bracket body 210 from rotating relative to the insulator 300, thereby improving the stability of the bracket body 210.

[0063] In one embodiment, a protrusion 218 is provided on the bracket end cover 220, and an anti-rotation groove 302 is provided on the insulator 300 corresponding to the protrusion 218. The protrusion 218 is inserted into the anti-rotation groove 302, which can effectively prevent the bracket body 210 from rotating relative to the insulator 300, thereby improving the stability of the bracket body 210.

[0064] In another embodiment, both the bracket body 210 and the bracket end cover 220 are provided with a protrusion 218 , and the insulator 300 is provided with an anti-rotation groove 302 corresponding to the protrusion 218 , and the protrusion 218 is inserted in the anti-rotation groove 302 , further improving the stability of the bracket body 210 .

[0065] Optionally, the bracket body 210 is provided with an inlet and outlet groove 224, which makes it more convenient to enter and exit the coil 205. Operators can directly introduce and lead out wires through these grooves without additional tools or steps, saving installation time and reducing installation difficulty.

[0066] In one embodiment, the bracket end cap 220 is provided with an inlet and outlet groove 224, which makes it more convenient to enter and exit the coil 205. The operator can directly introduce and lead out the wires through these grooves without additional tools or steps, saving installation time and reducing installation difficulty.

[0067] In another embodiment, both the bracket end cover 220 and the bracket body 210 are provided with inlet and outlet wire grooves 224, and the operator can select the position of the inlet and outlet wires according to the specific situation, thereby reducing the limitation of wiring and making the assembly and maintenance of the coil 205 more flexible and convenient.

[0068] This embodiment also provides a transformer, including a transformer housing and the above-mentioned magnetic core fixing device, the magnetic core fixing device is arranged in the housing, and the stability of the coil 205 and the magnetic core of the transformer is improved. In addition, the magnetic core fixing device is installed inside the transformer housing, and the transformer housing provides an additional external protective layer, which can effectively protect the magnetic core and the coil 205 from the influence of the external environment, such as moisture, dust, etc., and prolong the service life of the transformer.

[0069] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A magnetic core fixing device, characterized in that: include: A magnetic core assembly (100) comprises a first magnetic core (110) and a second magnetic core (120); A coil support (200), wherein a through hole (203) is provided in the coil support (200) along the axial direction of the coil support (200), a first limiting groove (201) and a second limiting groove (202) are respectively provided at two ends of the coil support (200), the first magnetic core (110) is embedded in the first limiting groove (201), and at least a portion of the first magnetic core (110) is passed through the through hole (203), and the second magnetic core (120) is embedded in the second limiting groove (202), and at least a portion of the second magnetic core (120) is passed through the through hole (203) to be connected to the first magnetic core (110); The first limiting groove (201) and the second limiting groove (202) are respectively configured to limit the first magnetic core (110) and the second magnetic core (120) from rotating in the circumferential direction of the coil support (200); and the through hole (203) is configured to limit the first magnetic core (110) and the second magnetic core (120) from moving in the radial direction of the coil support (200).

2. The magnetic core fixing device according to claim 1, characterized in that: The first magnetic core (110) comprises a first plate (111) and a first magnetic column (112); the first plate (111) is limited in the first limiting groove (201), and the first magnetic column (112) is penetrated in the through hole (203); The second magnetic core (120) comprises a second plate (121) and a second magnetic column (122); the second plate (121) is limited in the second limiting groove (202); the second magnetic column (122) is passed through the through hole (203) and connected to the first magnetic column (112).

3. The magnetic core fixing device according to claim 2, characterized in that: The diameter of the first magnetic column (112) and the diameter of the second magnetic column (122) are both equal to the diameter of the through hole (203).

4. The magnetic core fixing device according to claim 2, characterized in that: The first magnetic core (110) further comprises two first side plates (113), the two first side plates (113) being arranged on the first plate (111) in a relative manner and being respectively located on both sides of the first magnetic column (112); the second magnetic core (120) comprises two second side plates (123), the two second side plates (123) being arranged on the second plate (121) in a relative manner and being respectively located on both sides of the second magnetic column (122); the first side plates (113) can be connected to the corresponding second side plates (123).

5. The magnetic core fixing device according to any one of claims 1 to 4, characterized in that: The magnetic core fixing device further comprises an insulator (300), the insulator (300) is provided with an assembly hole (301), the coil support (200) is passed through the assembly hole (301), and the two ends of the coil support (200) are respectively limited on the insulator (300).

6. The magnetic core fixing device according to claim 5, characterized in that: The coil support (200) comprises a support body (210) and a support end cover (220); one end of the support body (210) is inserted into the assembly hole (301), and the other end is limited to the first end of the insulator (300); one end of the support end cover (220) is inserted into the assembly hole (301) and connected to the support body (210), and the other end is limited to the second end of the insulator (300).

7. The magnetic core fixing device according to claim 6, characterized in that: The bracket body (210) comprises a first annular segment (211) and a second annular segment (212) which are sequentially arranged, the diameter of the second annular segment (212) being smaller than the diameter of the first annular segment (211) so as to form a first limiting surface (213), the outer peripheral surface of the second annular segment (212) abutting against the inner wall of the assembly hole (301), and the first limiting surface (213) being in contact with the end surface of the first end of the insulator (300); The bracket end cover (220) comprises a third annular segment (221) and a fourth annular segment (222) which are arranged in sequence, the diameter of the fourth annular segment (222) being smaller than the diameter of the third annular segment (221) so as to form a second limiting surface (223), the outer peripheral surface of the fourth annular segment (222) abutting against the inner wall of the assembly hole (301), and the second limiting surface (223) being fitted on the end surface of the second end of the insulator (300).

8. The magnetic core fixing device according to claim 7, characterized in that: The support body (210) further comprises a fifth annular segment (214), the fifth annular segment (214) being connected to an end of the second annular segment (212) facing away from the first annular segment (211), the diameter of the fifth annular segment (214) being smaller than the diameter of the second annular segment (212) so as to form a third limiting surface (216), the fifth annular segment (214) being detachably connected to the fourth annular segment (222), the end surface of the fourth annular segment (222), the fifth annular segment (214) and the third limiting surface (216) jointly forming an annular groove (204), the annular groove (204) being used to accommodate the coil (205).

9. The magnetic core fixing device according to claim 8, characterized in that: An inserting portion (215) is provided at one end of the fifth ring segment (214) which faces away from the second ring segment (212); an inserting groove (2221) is provided in the fourth ring segment (222); and the inserting portion (215) is interference-fitted in the inserting groove (2221); Alternatively, the plug-in portion (215) is provided with an external thread, the inner wall of the plug-in slot (2221) is provided with an internal thread, and the external thread is screwed and connected to the internal thread.

10. The magnetic core fixing device according to claim 9, characterized in that: The plug-in portion (215) is an annular plug-in portion (215), and the plug-in groove (2221) is an annular plug-in groove (2221). The diameter of the annular plug-in portion (215) is smaller than the diameter of the fifth annular segment (214) to form a fourth limiting surface (217). When the annular plug-in portion (215) is assembled in the annular plug-in groove (2221), the fourth limiting surface (217) can abut against the end surface of the fourth annular segment (222).

11. The magnetic core fixing device according to claim 6, characterized in that: The support body (210) and / or the support end cover (220) are provided with a protrusion (218), the insulator (300) is provided with an anti-rotation groove (302) corresponding to the protrusion (218), and the protrusion (218) is inserted into the anti-rotation groove (302).

12. The magnetic core fixing device according to claim 6, characterized in that: The support body (210) and / or the support end cover (220) are provided with an inlet and outlet wire groove (224).

13. A transformer, characterized in that It comprises a transformer housing and a magnetic core fixing device as described in any one of claims 1 to 12, wherein the magnetic core fixing device is arranged in the transformer housing.

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