CN214796996U

CN214796996U - Transformer structure

Info

Publication number: CN214796996U
Application number: CN202120868430.0U
Authority: CN
Inventors: 叶孟淼; 黄少华; 黄建林
Original assignee: Zhejiang Delixi Electrical Appliances Co ltd
Current assignee: Zhejiang Delixi Electrical Appliances Co ltd
Priority date: 2021-04-25
Filing date: 2021-04-25
Publication date: 2021-11-19
Anticipated expiration: 2031-04-25

Abstract

The utility model discloses a transformer structure, which comprises a framework wound with coils, a magnetic core component and a fixed frame, wherein the fixed frame is provided with a wiring panel which is arranged vertical to the side surface of the magnetic core component, the bottom of the wiring panel is provided with a U-shaped cover cap which surrounds the conductive piece, in the installation process, the cover cap is inserted into the guide grooves at the two sides of the connecting lug boss in a sliding way through an installation convex strip, when the installation convex strip and the guide grooves keep fixed relative positions through a limit structure, the cover cap is fixed at the bottom of the wiring panel, by adopting the technical scheme, the cover cap is connected to the bottom of the wiring panel in a sliding way along the direction vertical to the side surface of the magnetic core component, so that the cover cap is kept in a horizontal relative posture with the framework when being installed by holding the hand, thus the cover cap is not interfered by the positions of the framework and a lead, the installation and the force application of the cover cap are convenient, the angle observation and the installation are convenient and rapid, the installation efficiency is improved, and the cooperation is fixed reliable.

Description

Transformer structure

Technical Field

The utility model relates to a low voltage apparatus technical field, concretely relates to transformer structure.

Background

A transformer is a device that changes an alternating voltage using the principle of electromagnetic induction, and main components are a primary coil, a secondary coil, and an iron core (magnetic core). The main functions are as follows: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization (magnetic saturation transformer), and the like. The transformer plays an increasingly important role as a key device in the power system, and the safe operation of the transformer is directly related to the reliability of the operation of the whole power system.

For example, chinese patent document CN209561155U discloses a novel transformer, including bobbin, left yoke, right yoke and the support that has the coil to twine, the support is the L type, including horizontal section and vertical section, horizontal section and vertical section fuse, vertical section control both ends respectively with the top of left yoke and the top threaded connection of right yoke, the bottom surface of horizontal section is equipped with the protective cover, and the equal opening in top and bottom, the top of protective cover and the bottom fixed connection of horizontal section, the top fixed mounting of horizontal section has the wiring groove, be equipped with the wiring subassembly in the recess on wiring groove top, the wiring subassembly includes line ball screw and soldering lug, the soldering lug is the L type, including integrative first connecting portion and the second connecting portion that link to each other, just the tip of second connecting portion is equipped with the hook. The protective cover is a plane cover plate which is arranged between two baffles on the bottom surface of the transverse section in an inserting mode, the protective cover is fixedly connected with the bottom surface of the transverse end after being inserted between the two baffles from bottom to top, and the fixing mode can adopt a bolt structure.

It can be seen from the structure of above-mentioned transformer that this kind of protective cover is followed vertical direction by supreme grafting to horizontal section bottom surface, correspond be equipped with in the bottom surface of horizontal section with two baffles of protective cover complex, make the structure of support do complicatedly, also easy being blocked by two baffles at the bonding wire, when holding the protective cover with the hand and assemble, the hand can contradict transformer skeleton very easily and arrange the wire in the skeleton outside, the hand can hinder the installation of protective cover too closely apart from transformer skeleton and wire, it is comparatively inconvenient to install, influence the installation effectiveness.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model aims to overcome the not enough of existence among the prior art to a hand grips the shroud and can not receive the interference of skeleton and wire position when installing, installs comparatively convenient and fast, and the cooperation is fixed reliable, the transformer structure that installation stability is good.

In order to solve the technical problem, the utility model provides a transformer structure, including the skeleton that has the coil around, and surround the magnetic core subassembly that sets up in the skeleton both ends, and set up in a set of mount of the both sides side of magnetic core subassembly top or bottom, and set up the binding post on the mount, the mount has the wiring panel that sets up perpendicular to the side of magnetic core subassembly, wiring panel bottom is provided with the electrically conductive piece of connecting the binding post, and surround the U type shroud that the electrically conductive piece set up;

the shroud passes through connection structure along the direction sliding connection of perpendicular to magnetic core subassembly side in wiring panel, connection structure is including setting up the connection boss of wiring panel bottom to and set up along shroud slip direction the direction recess of connection boss both sides, with correspond the setting and be in shroud both sides and sliding connection in the installation sand grip of direction recess, the installation sand grip with be provided with between the direction recess and keep the fixed limit structure of the two relative position.

Preferably, the conductive member has a contact piece extending out of the bottom of the junction panel, the end of the contact piece is provided with a U-shaped wire clamping port, and the coil is connected to the U-shaped wire clamping port through a wire leading structure in an extending mode.

Preferably, the top of the conductive piece is provided with a hollow cylinder suitable for the terminal to pass through, and the contact piece can be inclined at a certain angle relative to the mounting panel when being acted by external force.

As a preferred scheme, binding post sets up in a plurality of wiring grooves at binding post panel top, binding post panel with be provided with the installation through-hole between the connection boss, electrically conductive piece passes the installation through-hole with binding post links to each other, the side of electrically conductive piece is provided with the convex closure structure, the convex closure structure with installation through-hole inner wall extrusion contact.

As an optimal scheme, limit structure is including setting up the spacing ka tai of direction recess with correspond the setting and be in spacing draw-in groove on the installation sand grip, the installation sand grip inserts direction recess in-process drives spacing draw-in groove forms the joint cooperation with spacing ka tai, spacing ka tai orientation shroud one side is equipped with the direction inclined plane.

As a preferred scheme, the fixing frame comprises a mounting panel which is attached and fixed to the side face of the magnetic core assembly, the cover cap and the mounting panel are arranged oppositely, two inserting block protrusions are arranged at two ends of the U-shaped cover cap, two inserting groove holes are correspondingly formed in the mounting panel, and the inserting block protrusions are inserted into the inserting groove holes when the cover cap is connected to the bottom of the wiring panel in a sliding mode.

As a preferable scheme, the cover cap is fixedly connected with the fixing frame to form a mounting cavity for surrounding and shielding the conductive piece.

As a preferred scheme, the installation panel is connected with the wiring panel in a right angle, a limiting step structure is formed between the installation panel and the wiring panel, and the limiting step structure is matched and abutted to the top of the magnetic core assembly.

As an optimal scheme, it is a set of the mount pass through fixed knot construct with magnetic core component is fixed continuous, fixed knot construct including running through a plurality of connecting holes that magnetic core component both sides side set up, and set up on the mount and with the spacing hole that the connecting hole is relative, and the fastening is worn to establish spacing hole with bolt part between the connecting hole, be provided with on the mounting panel and penetrate the guide hole post of connecting hole, spacing hole run through set up in the guide hole post, the aperture of spacing hole is less than the aperture of connecting hole makes bolt part pass spacing hole stretch into when in the connecting hole with leave certain space between the connecting hole.

As a preferable scheme, the fixing frame is further provided with a grounding terminal, and the grounding terminal passes through the opening of the fixing frame to be connected with the magnetic core assembly.

As a preferred scheme, the magnetic core subassembly is including setting up relatively the first magnetic core and the second magnetic core at skeleton both ends, and the shaping can hold between first magnetic core and second magnetic core the installation space of skeleton, the skeleton both ends are provided with spacingly respectively the positioning baffle of first magnetic core and second magnetic core.

The technical scheme of the utility model compare and have following advantage in prior art:

1. the utility model provides an among the transformer structure, the shroud is along direction sliding connection in the wiring panel bottom of perpendicular to magnetic core assembly side, in the installation, the shroud passes through during installation sand grip sliding insertion connects the direction recess of boss both sides, when installation sand grip and direction recess keep relative position fixed through limit structure, the realization is fixed the shroud in wiring panel bottom, thereby surround the electrically conductive piece that is located wiring panel bottom, adopt this technical scheme, as long as with the U-shaped opening of shroud face magnetic core assembly side level insert wiring panel bottom can, make hand hold the shroud when installing keep horizontal relative posture with the skeleton, can not receive the position interference of skeleton and wire like this, also be convenient for install the application of force to the shroud, the angle is observed conveniently, it is comparatively convenient and fast to install, ensure that the shroud can be quick, The installation efficiency is improved on the mount to steady installation, and the cooperation is fixed reliable, and stability is good.

2. The utility model provides an among the transformer structure, the installation sand grip is inserting the in-process of direction recess, the tip of installation sand grip can contact spacing ka tai earlier, can guide through the direction inclined plane spacing ka tai is crossed in the comparatively light slip of tip of installation sand grip to make spacing ka tai and spacing draw-in groove formation joint cooperation, at this moment the installation sand grip targets in place in the direction recess, and prevent that the installation sand grip from retreating the slip along the direction recess, thereby play spacing installation effect to the shroud bottom the terminal plate, mounting structure is convenient, and the cooperation is fixed reliable.

3. The utility model provides an among the transformer structure, be provided with U-shaped clip line mouth on the contact strip that electrically conductive piece slope extends the setting, the coil extends through the lead structure and is connected to U-shaped clip line mouth department to utilize U-shaped clip line mouth to block the back with the lead structure, then weld the lead structure with the contact piece, simple structure, it is convenient to connect, guarantees the fastness and the stability of being connected between lead structure and the electrically conductive piece, realizes the electricity between coil and the binding post and is connected.

4. The utility model provides an among the transformer structure, wear to establish between spacing hole and connecting hole through the fastening of bolt part, and will be a set of the mount is fixed on the both sides side of magnetic core subassembly, according to the aperture in spacing hole is less than the aperture of connecting hole, this spacing hole can play limiting displacement to bolt part, makes bolt part passes spacing hole stretch into to in the connecting hole time with leave certain space between the connecting hole, pass for bolt part promptly during the connecting hole not with the inner wall of connecting hole takes place the contact to play insulating connection effect between connecting hole and bolt part, use safe and reliable more.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic plan view of a transformer structure according to the present invention;

fig. 2 is a schematic cross-sectional structure diagram of the transformer structure of the present invention;

fig. 3 is a schematic diagram of a partial enlarged structure of the transformer structure of the present invention;

fig. 4 is a schematic structural view of the cover cap of the present invention;

fig. 5 is a schematic structural view of the fixing frame of the present invention;

fig. 6 is a schematic structural view of the conductive member of the present invention

Description of reference numerals: 1. a framework; 11. a lead structure; 12. positioning a baffle plate; 2. a magnetic core assembly; 21. a first magnetic core; 22. a second magnetic core; 3. a fixed mount; 31. a wiring panel; 32. installing a panel; 33. a limiting step structure; 34. a slot hole; 4. a conductive member; 40. a contact piece; 41. a U-shaped wire clamping port; 42. a convex hull structure; 5. a cover; 51. installing convex strips; 52. a limiting clamping groove; 53. the insertion block is protruded; 6. connecting the bosses; 61. a guide groove; 62. a limiting clamping table; 63. a guide slope; 7. a wiring terminal; 8. a fixed structure; 81. connecting holes; 82. a limiting hole; 83. a bolt member; 84. a via post; 9. and a ground terminal.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example 1

The present embodiment is described in detail below with reference to the accompanying drawings:

the utility model provides a transformer structure as shown in fig. 1-6, including a framework 1 wound with coils, a magnetic core component 2 arranged at two ends of the framework 1 in a surrounding manner, a group of fixing frames 3 arranged at two side surfaces of the top or the bottom of the magnetic core component 2, and a wiring terminal 7 arranged on the fixing frames 3, wherein the fixing frames 3 are provided with a wiring panel 31 arranged perpendicular to the side surface of the magnetic core component 2, the bottom of the wiring panel 31 is provided with a conductive piece 4 connected with the wiring terminal 7, and a U-shaped cover 5 arranged around the conductive piece 4;

shroud 5 through connection structure along the direction sliding connection of perpendicular to magnetic core subassembly 2 side in connection panel 31, connection structure is including setting up connection boss 6 of connection panel 31 bottom to and set up along 5 slip direction of shroud guide groove 61 of connecting 6 both sides of boss, and correspond the setting and be in 5 both sides of shroud and sliding connection in guide groove 61's installation sand grip 51, installation sand grip 51 with be provided with between the guide groove 61 and keep the fixed limit structure of the two relative position.

In the above embodiment, the cover cap 5 is slidably connected to the bottom of the connection panel 31 along a direction perpendicular to the side surface of the magnetic core assembly 2, during the installation process, the cover cap 5 is slidably inserted into the guide grooves 61 at both sides of the connection boss 6 through the installation convex strip 51, when the installation convex strip 51 and the guide grooves 61 are kept fixed in relative positions through the limiting structure, the cover cap 5 is fixed at the bottom of the connection panel 31 so as to surround the conductive member 4 at the bottom of the connection panel 31, by adopting the technical scheme, only the U-shaped opening of the cover cap 5 is inserted into the bottom of the connection panel 31 in a horizontal direction facing the side surface of the magnetic core assembly 2, so that the cover cap 5 is held by a hand to be installed, and is kept in a horizontal relative posture with the framework 1, thus the cover cap is not interfered by the positions of the framework 1 and the conductive wire, the cover cap 5 is convenient to install and apply force, the angle observation is convenient and the installation is more convenient and faster, the cover 5 can be quickly and stably installed on the fixing frame 3, the installation efficiency is improved, the matching fixation is reliable, and the stability is good.

The specific arrangement of the fixing frame 3 and the cover 5 will be described in detail with reference to fig. 1 and 3-4:

limiting structure is including setting up the spacing ka tai 62 of direction recess 61 with correspond the setting and be in spacing draw-in groove 52 on the installation sand grip 51, installation sand grip 51 inserts direction recess 61 in-process drives spacing draw-in groove 52 forms the joint cooperation with spacing ka tai 62, spacing ka tai 62 orientation 5 one side of shroud is equipped with direction inclined plane 63. This kind of structure setting, installation sand grip 51 is inserting the in-process of guide groove 61, the tip of installation sand grip 51 can touch spacing ka tai 62 earlier, can guide through direction inclined plane 63 spacing ka tai 62 is crossed in the comparatively light slip of tip of installation sand grip 51 to make spacing ka tai 62 and spacing draw-in groove 52 form the joint cooperation, installation sand grip 51 at this moment targets in place in guide groove 61, and prevent that installation sand grip 51 from retreating along guide groove 61 and sliding, thereby play spacing installation effect to shroud 5 in terminal panel 31 bottom, and mounting structure is convenient, and the cooperation is fixed reliable.

As shown in fig. 3-4, the fixing frame 3 is fixed by the attachment to the mounting panel 32 on the side of the magnetic core assembly 2, the cover cap 5 is arranged opposite to the mounting panel 32, two protruding blocks 53 are arranged at two ends of the U-shape of the cover cap 5, two slots 34 are correspondingly arranged on the mounting panel 32, the protruding blocks 53 are arranged in the way that the cover cap 5 is slidably connected to the bottom of the wiring panel 31 and inserted into the slots 34, the cover cap 5 is positioned, and meanwhile, the mounting convex strips 51 on the cover cap 5 are connected to the guide grooves 61 of the connecting bosses 6 in a clamped manner, so that the mounting stability between the cover cap 5 and the fixing frame 3 is improved.

As a preferred embodiment, referring to fig. 3 and 6, the conductive piece 4 has a contact piece 40 extending out of the bottom of the connection panel 31, the end of the contact piece 40 is provided with a U-shaped wire opening 41, the coil is connected to the U-shaped wire opening 41 by a wire structure 11 in an extending manner, the U-shaped wire opening 41 can be pressed for clamping the wire structure, the wire structure 11 is a wire, the top of the conductive piece 4 is provided with a hollow cylinder suitable for a connection terminal 7 to pass through, the conductive piece is connected to the connection groove of the connection panel by the hollow cylinder in a positioning manner, the contact piece 40 can be inclined at a certain angle relative to the installation panel when being subjected to external force, and after the cover is removed, the welding operation of the wire at the U-shaped wire opening 41 is facilitated by adjusting the inclined angle of the contact piece. According to the structure, after the lead structure 11 is clamped by the U-shaped wire clamping port 41, the lead structure 11 and the contact piece are welded, the structure is simple, the connection is convenient, the firmness and the stability of connection between the lead structure 11 and the conductive piece 4 are guaranteed, and the electric connection between the coil and the wiring terminal 7 is realized. The cover 5 is fixedly connected with the fixing frame 3 to form a mounting cavity for surrounding and shielding the conductive piece 4, so that the contact piece of the conductive piece 4 is accommodated in the mounting cavity, the electric shock accident caused by the fact that a person mistakenly contacts the conductive piece 4 can be prevented, and the protection performance is good.

As a specific structure setting, binding post 7 sets up in a plurality of wiring grooves at wiring panel 31 top, be equipped with a plurality of binding post 7 on every mount 3, it is a plurality of wiring groove with be provided with the installation through-hole between connecting the boss 6, electrically conductive 4 passes the installation through-hole with binding post 7 links to each other, binding post 7 is the butt on electrically conductive 4's one end, electrically conductive 4's side is provided with convex closure structure 42, convex closure structure 42 with installation through-hole inner wall extrusion contact makes electrically conductive 4 keep zonulae occludens in the installation through-hole, realizes the reliable fixed of electrically conductive 4 in the installation through-hole.

Referring to fig. 1 and 5, the fixing frame 3 is an L-shaped structure, the mounting panel 32 is connected to the wiring panel 31 at a right angle, the wiring panel 31 is further provided with a grounding terminal 9, and the grounding terminal 9 passes through an opening in the fixing frame 3 to be connected to the magnetic core assembly 2, so as to implement the grounding protection function of the transformer. Wherein, mounting panel 32 with the shaping has spacing stair structure 33 between the wiring panel 31, mount 3 passes through spacing stair structure 33 cooperation butt is in magnetic core component 2's top realizes the location installation effect of mount 3 on magnetic core component 2, just so need not to go the mounted position of calibration mount 3 again, and the installation of the follow-up bolt part 83 of being convenient for is fixed, can prevent that mount 3 from taking place the vertical migration phenomenon along magnetic core component 2 side in the installation, reinforcing installation stability.

In this embodiment, a set of the fixing frame 3 is fixedly connected to the magnetic core assembly 2 through a fixing structure 8, the fixing structure 8 includes a plurality of connecting holes 81 disposed through two side surfaces of the magnetic core assembly 2, a limiting hole 82 disposed on the fixing frame 3 and opposite to the connecting hole 81, and a bolt member 83 fastened and disposed between the limiting hole 82 and the connecting hole 81, the mounting panel 32 is provided with a guiding hole column 84 penetrating the connecting hole 81, the limiting hole 82 is disposed through the guiding hole column 84, which is advantageous in that the fixing frame 3 is fastened and disposed between the limiting hole 82 and the connecting hole 81 through the bolt member 83, and the fixing frame 3 is fixed on two side surfaces of the magnetic core assembly 2, and the limiting hole 82 can limit the bolt member 83 according to the aperture of the limiting hole 82 being smaller than the aperture of the connecting hole 81, when the bolt part 83 penetrates through the limiting hole 82 and extends into the connecting hole 81, a certain gap is reserved between the bolt part 83 and the connecting hole 81, namely the bolt part 83 does not contact with the inner wall of the connecting hole 81 when penetrating through the connecting hole 81, so that an insulating connecting effect is achieved between the connecting hole 81 and the bolt part 83, and the use is safer and more reliable.

As shown in fig. 1-2, a set of fixing frames 3 is disposed on two side surfaces of the top of the magnetic core assembly 2, a set of supporting frames is disposed on two side surfaces of the bottom of the magnetic core assembly 2, the set of supporting frames is also fixedly connected to the magnetic core assembly 2 through the fixing structure 8, and the supporting frames are provided with a plurality of mounting holes. Further preferred setting, magnetic core subassembly 2 is including setting up relatively the first magnetic core 21 and the second magnetic core 22 at 1 both ends of skeleton and the shaping can hold between first magnetic core 21 and second magnetic core 22 the installation space of

skeleton

1, 1 both ends of skeleton are provided with spacingly respectively the locating baffle 12 of first magnetic core 21 and second magnetic core can prevent through locating baffle 12 that first magnetic core 21 and second magnetic core from taking place the mounted position skew, improve installation stability. The first magnetic core 21 is in a vertical bar shape, the first magnetic core 21 is in an E shape, and the first magnetic core 21 and the second magnetic core are formed by stacking a plurality of silicon steel sheets respectively.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. A transformer structure comprises a framework (1) wound with a coil, a magnetic core assembly (2) arranged at two ends of the framework (1) in a surrounding manner, a group of fixing frames (3) arranged on two side surfaces of the top or the bottom of the magnetic core assembly (2), and a wiring terminal (7) arranged on the fixing frames (3), wherein the fixing frames (3) are provided with wiring panels (31) perpendicular to the side surfaces of the magnetic core assembly (2), conductive pieces (4) connected with the wiring terminals (7) are arranged at the bottoms of the wiring panels (31), and U-shaped cover caps (5) surrounding the conductive pieces (4); the method is characterized in that:

shroud (5) through connection structure along the direction sliding connection of perpendicular to magnetic core subassembly (2) side in connection panel (31), connection structure is including setting up connection boss (6) of connection panel (31) bottom to and set up along shroud (5) slip direction connect guide groove (61) of boss (6) both sides, and correspond the setting and be in shroud (5) both sides and sliding connection in the installation sand grip (51) of guide groove (61), installation sand grip (51) with be provided with between guide groove (61) and keep the fixed limit structure of the two relative position.

2. The transformer structure according to claim 1, wherein the conductive member (4) has a contact piece (40) protruding from the bottom of the terminal panel (31), the end of the contact piece (40) is provided with a U-shaped wire port (41), and the coil is extended and connected to the U-shaped wire port (41) through a lead structure (11).

3. The transformer structure according to claim 2, wherein the connection terminal (7) is arranged in a plurality of connection grooves at the top of the connection panel (31), a mounting through hole is arranged between the plurality of connection grooves and the connection boss (6), the conductive piece (4) passes through the mounting through hole to be connected with the connection terminal (7), a convex hull structure (42) is arranged on the side surface of the conductive piece (4), and the convex hull structure (42) is in pressing contact with the inner wall of the mounting through hole.

4. A transformer structure according to claim 3, characterized in that the top of the conductive member (4) is provided with a hollow cylinder for the terminal (7) to pass through, and the contact piece (40) is inclined at a certain angle relative to the mounting panel when being applied by external force.

5. The transformer structure according to claim 1, wherein the limiting structure comprises a limiting clamping table (62) arranged in the guide groove (61) and a limiting clamping groove (52) correspondingly arranged on the mounting convex strip (51), the mounting convex strip (51) drives the limiting clamping groove (52) to form clamping fit with the limiting clamping table (62) in the process of being inserted into the guide groove (61), and a guide inclined surface (63) is arranged on one side, facing the cover cap (5), of the limiting clamping table (62).

6. The transformer structure according to claim 5, wherein the fixing frame (3) comprises a mounting panel (32) attached and fixed to the side of the magnetic core assembly (2), the cover (5) is disposed opposite to the mounting panel (32), two insertion block protrusions (53) are disposed at two ends of the U-shape of the cover (5), two insertion slot holes (34) are correspondingly disposed on the mounting panel (32), and the insertion block protrusions (53) are inserted into the insertion slot holes (34) when the cover (5) is slidably connected to the bottom of the connection panel (31).

7. A transformer structure according to claim 6, characterized in that the mounting panel (32) is connected to the connection panel (31) at right angles and between them is formed a limiting step (33), the limiting step (33) being fitted against the top of the core assembly (2).

8. The transformer structure according to any one of claims 5-7, wherein a set of the fixing frame (3) is fixedly connected with the magnetic core assembly (2) through a fixing structure (8), the fixing structure (8) comprises a plurality of connecting holes (81) penetrating through two side surfaces of the magnetic core assembly (2), a limiting hole (82) arranged on the fixing frame (3) and opposite to the connecting holes (81), and a bolt part (83) tightly penetrating between the limiting hole (82) and the connecting holes (81), a guide hole column (84) penetrating into the connecting holes (81) is arranged on the installation panel (32), the limiting hole (82) penetrates through the guide hole column (84), the aperture of the limiting hole (82) is smaller than that of the connecting holes (81), so that the bolt part (83) penetrates through the limiting hole (82) and is connected with the connecting holes (81) when extending into the connecting holes (81) A certain gap is left between the holes (81).

9. The transformer structure according to claim 8, characterized in that the fixing frame (3) is further provided with a grounding terminal (9), and the grounding terminal (9) is connected with the magnetic core assembly (2) through an opening on the fixing frame (3).

10. The transformer structure according to claim 1, wherein the magnetic core assembly (2) comprises a first magnetic core (21) and a second magnetic core (22) which are oppositely arranged at two ends of the framework (1), and an installation space which is formed between the first magnetic core and the second magnetic core and can accommodate the framework (1), and two ends of the framework (1) are respectively provided with a positioning baffle (12) for limiting the first magnetic core (21) and the second magnetic core.