A transformer core

Abstract

This invention provides a transformer core, comprising a first core and a second core, with their open ends in contact to form a closed magnetic circuit. A first magnetic post and a second magnetic post are respectively located at the center of the open ends of the first and second cores. A positioning element is provided at the top of the first magnetic post, which connects to the second magnetic post, achieving docking. The first and second cores are connected to form a core body, on which a fixing assembly is fitted. The fixing assembly includes a first fixing bracket and a second fixing bracket, both C-shaped, respectively fitted onto the first and second cores, and the first and second fixing brackets are detachably connected. This core ensures accurate connection between the first and second magnetic posts through the positioning element and reliably fixes the first and second cores through the fixing assembly, solving the problems of insufficient splicing accuracy and poor fixing stability of traditional detachable cores, thus improving the working efficiency and reliability of the transformer.

Description

Technical Field

[0001] This utility model belongs to the field of transformer technology, and more specifically, it relates to a transformer core. Background Technology

[0002] Transformer cores are the core components used to achieve electromagnetic induction and complete energy conversion. Among them, detachable cores are widely used in transformer manufacturing because they are convenient for coil assembly and maintenance. Detachable cores are usually formed by assembling two sets of sub-cores to form a closed magnetic circuit. The splicing accuracy and fixing stability directly determine the integrity of the magnetic circuit and the reliability of the equipment.

[0003] However, the splicing of the two sets of sub-cores in traditional transformer cores mostly relies on edge alignment, lacking a positioning structure for the central magnetic column. This makes it easy for the center to shift during splicing, which disrupts the symmetry of the magnetic circuit, causes uneven magnetic flux distribution, and increases magnetic loss. At the same time, the fixing components of the sub-cores mostly adopt an integral frame or simple snap-fit ​​design. When it is necessary to inspect the coil or adjust the core parameters, the disassembly process is cumbersome, and repeated disassembly and assembly can easily cause the fixing structure to loosen, resulting in gaps on the mating surface of the sub-cores, further increasing magnetic resistance and reducing transformer efficiency. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a transformer core to solve the technical issues in the prior art, such as the lack of a central magnetic column for positioning when splicing two sets of sub-cores in a traditional transformer core, which makes them prone to misalignment, and the cumbersome disassembly and assembly of fixing components which are prone to loosening due to repeated disassembly and assembly, leading to increased magnetic resistance and reduced efficiency.

[0005] The purpose and effect of this utility model of a transformer core are achieved by the following specific technical means:

[0006] A transformer core includes a first core and a second core, the open ends of the first core and the second core are in contact with each other, a first magnetic post and a second magnetic post are respectively provided at the center of the open ends of the first core and the second core, a positioning element for installation and positioning is provided on the top of the first magnetic post, and the first magnetic post is connected to the second magnetic post through the positioning element.

[0007] The first magnetic core and the second magnetic core are connected to form a magnetic core body. A fixing component for installation and fixing is sleeved on the magnetic core body. The fixing component includes a first fixing bracket and a second fixing bracket, which are arranged in a C-shape and respectively sleeved on the first magnetic core and the second magnetic core. The first fixing bracket and the second fixing bracket are detachably connected.

[0008] According to a preferred embodiment, the first fixing frame includes a first horizontal bar and first vertical bars on both sides of the first horizontal bar, and the second fixing frame includes a second horizontal bar and second vertical bars on both sides of the second horizontal bar. The length of the first vertical bar is less than the height of the first magnetic core, and a gap is formed between the top surface of the first vertical bar and the bottom surface of the second vertical bar.

[0009] A fixing rod is provided on the outer side of the first vertical rod, and a fixing sleeve is provided on the outer side of the second vertical rod corresponding to the fixing rod, with the fixing rod passing through the fixing sleeve.

[0010] According to a preferred embodiment, the portion of the fixing rod that passes through the fixing sleeve is a fixing area. A fixing groove is provided on the fixing rod, and a fixing slider is engaged in the fixing groove and slidably connected to the fixing rod, and is located in the fixing area.

[0011] Limiting grooves are provided on both sides of the fixed rod, and the limiting grooves are connected to the fixed sliding groove. Contraction grooves are provided on both sides of the fixed slider, and limiting blocks are provided in the contraction grooves and are locked in the limiting grooves.

[0012] The limiting block is rotatably connected to the fixed slider, and a spring is provided between the limiting block and the fixed slider. The limiting block can retract into the shrinkage groove through the spring.

[0013] According to a preferred embodiment, the limiting block is supported by the spring force, the limiting block unfolds to form a fixed state, and the limiting block retracts into the contraction groove to form an unlocked state by squeezing the spring.

[0014] When in a fixed state, the two sets of limiting blocks protrude from the fixing rod, the top of the fixing rod is provided with a fixing bolt, the fixing bolt rotates downward and one end abuts against the fixing slider, the limiting block contacts the top of the fixing sleeve, and the first fixing frame is connected to the second fixing frame;

[0015] When in the unlocked state, the two sets of limiting blocks retract into the fixed rod, the fixed bolt rotates upward, and a gap is formed between the fixed bolt and the fixed slider. When the two sets of limiting blocks are pressed, the limiting blocks retract into the shrinkage groove, and the first fixed frame separates from the second fixed frame.

[0016] According to a preferred embodiment, the first magnetic core is provided with two sets of top surfaces, and the second magnetic core is provided with a bottom surface corresponding to the top surfaces. The top surface is provided with a first positioning block and a plurality of sets of second positioning blocks, and the bottom surface is provided with a first positioning groove and a plurality of sets of second positioning grooves corresponding to the top and bottom surfaces, respectively. The first positioning block is engaged in the first positioning groove, the second positioning block is engaged in the second positioning groove, and the top surface is in contact with the bottom surface.

[0017] According to a preferred embodiment, the positioning component includes a first positioning block and a second positioning block, the first positioning block being located at the top of the first magnetic column, the second positioning block being located at the top of the first positioning block, the first positioning block being configured as a cuboid, and the second positioning block being configured as a cylinder.

[0018] The second magnetic post has a first positioning slot corresponding to the first positioning card block, and the first positioning slot has a second positioning slot corresponding to the second positioning card block.

[0019] When the first magnetic post is connected to the second magnetic post, the second positioning block passes through the first positioning slot and is engaged in the second positioning slot, thus playing a pre-positioning role;

[0020] The first positioning block is engaged in the first positioning slot, restricting the rotation between the first magnetic core and the second magnetic core.

[0021] According to a preferred embodiment, multiple sets of heat dissipation grooves are formed on the inner side of both the first magnetic core and the second magnetic core, and heat dissipation protrusions are provided in the heat dissipation grooves, with the heat dissipation protrusions having a triangular cross-section.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. This utility model forms a multi-positioning structure by connecting the positioning element at the top of the first magnetic core to the second magnetic core, and by cooperating the first positioning block and the second positioning block on the top surface of the first magnetic core with the first positioning groove and the second positioning groove on the bottom surface of the second magnetic core. Specifically, the engagement of the first positioning block and the second positioning groove of the positioning element effectively restricts the rotation of the first and second magnetic cores. The second positioning block passes through the first positioning groove and is engaged within the second positioning groove to achieve pre-positioning. Combined with the engagement of the first positioning block and the first positioning groove, and the second positioning block and the second positioning groove at the edges, this completely solves the problem of center offset caused by relying solely on edge alignment in traditional magnetic cores, ensuring the symmetry of the magnetic circuit and reducing magnetic losses caused by uneven magnetic flux distribution.

[0024] 2. The fixing assembly adopts a C-shaped first and second fixing frame, connected by a fixing rod passing through the fixing sleeve. Combined with the design of the fixing slider, limit block, and spring, the first and second fixing frames are both reliably fixed and easily disassembled. When in the fixed state, the limit block unfolds under the spring force and contacts the top of the fixing sleeve, while the fixing bolt further reinforces the fixing slider, avoiding gaps in the contact surface caused by loosening in traditional fixing components. When disassembly is required, pressing the limit block causes it to retract into the shrinkage groove, and rotating the fixing bolt separates the two sets of fixing frames. This solves the problem of cumbersome disassembly and assembly in traditional fixing components, ensuring stable fixing even after repeated disassembly and assembly, reducing the risk of increased magnetic resistance, and improving transformer efficiency.

[0025] 3. The length of the first vertical rod is less than the height of the first magnetic core, creating a gap between the top surface of the first vertical rod and the bottom surface of the second vertical rod. This provides adjustment space for the magnetic core, allowing the fixing assembly to be used on magnetic cores of different sizes. The smaller the magnetic core, the smaller the gap between the first and second vertical rods; conversely, the larger the magnetic core, the larger the gap. The limiting block and the fixed slider are rotatably connected and retracted via a spring. The limiting grooves on both sides of the fixed rod are connected to the fixed sliding groove, ensuring stable and reliable extension and retraction of the limiting block. This ensures smooth switching between the fixed and unlocked states and improves operational convenience. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the assembled structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the disassembled structure of this utility model;

[0028] Figure 3 This is a cross-sectional view of the first and second magnetic cores after they have been separated.

[0029] Figure 4 yes Figure 2 A magnified view of a portion of region a;

[0030] Figure 5 yes Figure 3 A magnified view of a portion of region b.

[0031] In the diagram, the correspondence between component names and their corresponding reference numerals is as follows:

[0032] 11. First magnetic core; 12. First magnetic pillar; 13. First positioning block; 14. Second positioning block; 15. Heat dissipation groove; 16. Heat dissipation protrusion; 21. Second magnetic core; 22. Second magnetic pillar; 23. First positioning groove; 24. Second positioning groove; 25. First positioning slot; 26. Second positioning slot; 31. First fixing frame; 32. Second fixing frame; 33. Fixing rod; 34. Fixing sleeve; 35. Fixing slide; 36. Limiting groove; 37. Limiting block; 41. First positioning block; 42. Second positioning block. Detailed Implementation

[0033] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the technical solution of this utility model, but should not be used to limit the scope of protection of this utility model.

[0034] Example:

[0035] like Figures 1 to 5 As shown, this utility model provides a transformer core, including a first magnetic core 11 and a second magnetic core 21. The open ends of the first magnetic core 11 and the second magnetic core 21 are in contact with each other, and when they are assembled, they form a closed magnetic circuit, providing a path for the electromagnetic induction of the transformer. A first magnetic post 12 and a second magnetic post 22 are respectively provided at the center of the open ends of the first magnetic core 11 and the second magnetic core 21. These two magnetic posts abut against each other during assembly, which can enhance the concentration of the magnetic circuit and reduce magnetic flux dispersion. A positioning element for installation and positioning is provided on the top of the first magnetic post 12. The first magnetic post 12 is connected to the second magnetic post 22 through the positioning element. With the cooperation of the positioning element, the relative displacement of the first magnetic core 11 and the second magnetic core 21 in the horizontal direction can be limited, ensuring the accuracy of alignment during assembly.

[0036] The first magnetic core 11 and the second magnetic core 21 are connected to form a magnetic core body. A fixing assembly for mounting and fixing is fitted on the magnetic core body. This assembly can tightly fit the two magnetic cores together and prevent gaps from appearing due to vibration during operation. The fixing assembly includes a first fixing bracket 31 and a second fixing bracket 32, which are arranged in a C-shape. This shape can fit the outer wall of the magnetic core, increase the contact area, and improve the stability of the fixing. They are respectively fitted on the first magnetic core 11 and the second magnetic core 21. The first fixing bracket 31 and the second fixing bracket 32 ​​are detachably connected, which facilitates the disassembly of the magnetic core when maintenance or adjustment is required.

[0037] The first fixing frame 31 includes a first horizontal bar and first vertical bars on both sides of the first horizontal bar. The first horizontal bar spans the top of the first magnetic core 11, constraining the upper part of the magnetic core. The first vertical bars on both sides extend along the sides of the magnetic core, limiting the lateral swaying of the magnetic core. The second fixing frame 32 includes a second horizontal bar and second vertical bars on both sides of the second horizontal bar. The function of the second horizontal bar and the second vertical bars is similar to the corresponding parts of the first fixing frame 31, providing a stable constraint on the second magnetic core 21. The length of the first vertical bar is less than the height of the first magnetic core 11, creating a gap between the top surface of the first vertical bar and the bottom surface of the second vertical bar. This gap can accommodate magnetic cores of different heights. When the specifications of the magnetic core change, stable fixing can be achieved by adjusting the relative positions of the two sets of fixing frames.

[0038] A fixing rod 33 is provided on the outer side of the first vertical rod, and a fixing sleeve 34 is provided on the outer side of the second vertical rod corresponding to the fixing rod 33. The fixing rod 33 passes through the fixing sleeve 34. The cooperation of the two can connect the first fixing frame 31 and the second fixing frame 32 into a whole, so that the constraint force of the two fixing frames can be transferred to each other, thereby pressing the first magnetic core 11 and the second magnetic core 21 together. At the same time, the sliding cooperation between the fixing rod 33 and the fixing sleeve 34 provides guidance for the relative movement of the two sets of fixing frames, ensuring that misalignment will not occur during the adjustment process and maintaining the stability of the magnetic core assembly.

[0039] like Figure 2 , Figure 4 As shown, the portion of the fixing rod 33 that passes through the fixing sleeve 34 constitutes a fixing area, which is the core part for connecting the first fixing frame 31 and the second fixing frame 32. A fixing groove 35 is provided on the fixing rod 33, and the fixing slider 43 is engaged within the fixing groove 35, allowing it to slide along the fixing rod 33 and always remain within the fixing area. The fixing groove 35 provides a path for the movement of the fixing slider 43 while restricting its displacement perpendicular to the sliding direction, ensuring that the fixing slider 43 can only adjust its position along the length of the fixing rod 33.

[0040] Both sides of the fixed rod 33 have limiting grooves 36, which communicate with the fixed sliding groove 35, allowing the structures on both sides of the fixed slider 43 to fit with the fixed rod 33. Both sides of the fixed slider 43 have contraction grooves, and limiting blocks 37 are installed in the contraction grooves. The limiting blocks 37 are engaged in the limiting grooves 36. This fit prevents relative rotation between the fixed slider 43 and the fixed rod 33. At the same time, the movement range of the fixed slider 43 is constrained by the position change of the limiting blocks 37 in the limiting grooves 36. The limiting blocks 37 are rotatably connected to the fixed slider 43, allowing the limiting blocks 37 to rotate about the connection point. The spring between the limiting blocks 37 and the fixed slider 43 provides continuous support for the limiting blocks 37. When there is no external force, the spring can push the limiting blocks 37 to remain in the extended state. If subjected to external pressure, the limiting blocks 37 can retract into the contraction grooves, thus adapting to different working conditions.

[0041] When the limiting block 37 is held in an extended state by the spring force, the whole structure is in a fixed state; when an external force compresses the spring, the limiting block 37 retracts into the contraction groove, thus switching to the unlocked state. In the fixed state, the two sets of limiting blocks 37 protrude from the fixing rod 33. At this time, the fixing bolt 44 at the top of the fixing rod 33 rotates downward, with one end abutting against the fixing slider 43, which can prevent the fixing slider 43 from sliding along the fixing groove 35. At the same time, the limiting block 37 contacts the top of the fixing sleeve 34. Through the interaction force of the two, the first fixing frame 31 and the second fixing frame 32 are firmly connected to prevent loosening during use.

[0042] When in the unlocked state, the two sets of limiting blocks 37 retract into the fixing rod 33, and the fixing bolt 44 rotates upward to form a gap with the fixing slider 43, releasing the constraint on the fixing slider 43. At this time, pressing the two sets of limiting blocks 37 makes them retract completely into the retraction groove, and the fixing slider 43 can move freely along the fixing groove 35, thereby driving the first fixing frame 31 and the second fixing frame 32 to separate, which facilitates the disassembly of the first magnetic core 11 and the second magnetic core 21 for inspection or adjustment.

[0043] like Figure 2 , Figure 3 As shown, the first magnetic core 11 has two sets of top surfaces, and the second magnetic core 21 has a bottom surface corresponding to the top surface. When the top and bottom surfaces contact each other, they form a complete magnetic circuit contact surface, reducing magnetic flux leakage at the joint. The top surface has a first positioning block 13 and multiple sets of second positioning blocks 14, and the bottom surface has a first positioning groove 23 and multiple sets of second positioning grooves 24 corresponding to both. When the first magnetic core 11 and the second magnetic core 21 are joined, the first positioning block 13 is engaged in the first positioning groove 23, and the second positioning block 14 is engaged in the second positioning groove 24. Through the cooperation of the blocks and grooves, the relative sliding of the two magnetic cores in the horizontal direction can be restricted, ensuring edge alignment during joining and preventing magnetic circuit misalignment due to displacement. The distribution of multiple sets of second positioning blocks 14 and second positioning grooves 24 further disperses the force, improving the overall stability after joining and reducing wear on individual positioning structures.

[0044] The positioning components include a first positioning block 41 and a second positioning block 42. The first positioning block 41 is located on top of the first magnetic post 12, and the second positioning block 42 is located on top of the first positioning block 41, forming a stepped structure. The first positioning block 41 is rectangular, and the second positioning block 42 is cylindrical. This difference in shape allows for hierarchical positioning. The second magnetic post 22 has a first positioning slot 25 corresponding to the first positioning block 41, and a second positioning slot 26 corresponding to the second positioning block 42 is formed within the first positioning slot 25. When the first magnetic post 12 and the second magnetic post 22 are connected, the second positioning block 42 first passes through the first positioning slot 25 and is engaged in the second positioning slot 26. Due to the guiding nature of the cylindrical structure, preliminary alignment can be quickly achieved, serving as a pre-positioning function and facilitating subsequent precise assembly. Subsequently, the first positioning block 41 is engaged in the first positioning slot 25. The cuboid block and the slot cooperate to restrict the rotation between the first magnetic core 11 and the second magnetic core 21, so as to avoid relative rotation due to vibration during operation and ensure the stability of the magnetic circuit.

[0045] like Figure 2 , 5 As shown, both the first magnetic core 11 and the second magnetic core 21 have multiple sets of heat dissipation grooves 15 on their inner sides. These grooves increase the contact area between the magnetic core and the air, accelerate heat dissipation, and prevent the magnetic performance of the magnetic core from deteriorating due to prolonged high temperatures. Heat dissipation protrusions 16 are provided within the heat dissipation grooves 15. The cross-section of the heat dissipation protrusions 16 is triangular. The triangular structure further increases the heat dissipation area within a limited space. Simultaneously, the protrusions can disrupt the airflow direction, creating turbulence within the grooves and improving heat exchange efficiency. Furthermore, the heat dissipation protrusions 16 also enhance the structural strength of the inner side of the magnetic core, reducing the decrease in core stiffness caused by the grooves and extending the service life of the magnetic core.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments.

Claims

1. A transformer core, comprising a first core (11) and a second core (21), characterized in that: The open ends of the first magnetic core (11) and the second magnetic core (21) are in contact with each other. The center of the open ends of the first magnetic core (11) and the second magnetic core (21) are respectively provided with a first magnetic post (12) and a second magnetic post (22). The top of the first magnetic post (12) is provided with a positioning member for installation and positioning. The first magnetic post (12) is connected to the second magnetic post (22) through the positioning member. The first magnetic core (11) and the second magnetic core (21) are connected to form a magnetic core body. A fixing component for installation and fixing is sleeved on the magnetic core body. The fixing component includes a first fixing bracket (31) and a second fixing bracket (32), which are arranged in a C-shape and respectively sleeved on the first magnetic core (11) and the second magnetic core (21). The first fixing bracket (31) and the second fixing bracket (32) are detachably connected.

2. A transformer core according to claim 1, characterized in that: The first fixing frame (31) includes a first horizontal bar and first vertical bars on both sides of the first horizontal bar, and the second fixing frame (32) includes a second horizontal bar and second vertical bars on both sides of the second horizontal bar. The length of the first vertical bar is less than the height of the first magnetic core (11), and a gap is formed between the top surface of the first vertical bar and the bottom surface of the second vertical bar. A fixing rod (33) is provided on the outer side of the first vertical rod, and a fixing sleeve (34) is provided on the outer side of the second vertical rod corresponding to the fixing rod (33), with the fixing rod (33) passing through the fixing sleeve (34).

3. A transformer core according to claim 2, characterized in that: The portion of the fixed rod (33) that passes through the fixed sleeve (34) is the fixed area. A fixed groove (35) is provided on the fixed rod (33). The fixed slider (43) is engaged in the fixed groove (35) and slidably connected with the fixed rod (33), and is located in the fixed area. The fixed rod (33) has limit grooves (36) on both sides, and the limit grooves (36) are connected to the fixed slide groove (35). The fixed slider (43) has shrinkage grooves on both sides, and a limit block (37) is provided in the shrinkage groove. The limit block (37) is locked in the limit groove (36). The limiting block (37) is rotatably connected to the fixed slider (43), and a spring is provided between the limiting block (37) and the fixed slider (43). The limiting block (37) can retract into the shrinkage groove through the spring.

4. A transformer core according to claim 3, characterized in that: The limiting block (37) is supported by the spring force. When the limiting block (37) is unfolded, it forms a fixed state. When the limiting block (37) is squeezed by the spring, it retracts into the contraction groove to form an unlocked state. When in a fixed state, the two sets of limiting blocks (37) protrude from the fixing rod (33), the top of the fixing rod (33) is provided with a fixing slider (43), the fixing slider (43) rotates downward and one end abuts against the fixing slider (43), the limiting block (37) contacts the top of the fixing sleeve (34), and the first fixing frame (31) is connected to the second fixing frame (32); When in the unlocked state, the two sets of limiting blocks (37) retract into the fixed rod (33), the fixed slider (43) rotates upward, and a gap is formed between the fixed slider (43) and the fixed slider (43). When the two sets of limiting blocks (37) are pressed, the limiting blocks (37) retract into the shrinkage groove, and the first fixed frame (31) and the second fixed frame (32) separate.

5. A transformer core according to claim 1, characterized in that: The first magnetic core (11) has two sets of top surfaces, and the second magnetic core (21) has a bottom surface corresponding to the top surfaces. The top surface has a first positioning block (13) and multiple sets of second positioning blocks (14). The bottom surface has a first positioning groove (23) and multiple sets of second positioning grooves (24) corresponding to the top and bottom surfaces, respectively. The first positioning block (13) is engaged in the first positioning groove (23), and the second positioning block (14) is engaged in the second positioning groove (24). The top surface is in contact with the bottom surface.

6. A transformer core according to claim 5, characterized in that: The positioning component includes a first positioning block (41) and a second positioning block (42). The first positioning block (41) is located on the top of the first magnetic column (12), and the second positioning block (42) is located on the top of the first positioning block (41). The first positioning block (41) is set in a cuboid shape, and the second positioning block (42) is set in a cylindrical shape. The second magnetic post (22) has a first positioning slot (25) corresponding to the first positioning card block (41), and the first positioning slot (25) has a second positioning slot (26) corresponding to the second positioning card block (42); When the first magnetic post (12) is connected to the second magnetic post (22), the second positioning block (42) passes through the first positioning slot (25) and is locked in the second positioning slot (26) to play a pre-positioning role; The first positioning block (41) is engaged in the first positioning slot (25) to restrict the rotation between the first magnetic core (11) and the second magnetic core (21).

7. A transformer core according to claim 1, characterized in that: Multiple sets of heat dissipation grooves (15) are provided on the inner side of the first magnetic core (11) and the second magnetic core (21). Heat dissipation protrusions (16) are provided in the heat dissipation grooves (15), and the heat dissipation protrusions (16) are triangular in cross-section.

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