Shell structure of current transformer

Abstract

The utility model provides a shell structure of a current transformer, which comprises a base and a cover plate, a mounting support plate fixed with a metal plate is arranged on one side of the base, the depth of the cover plate is smaller than that of the base, a mounting groove for mounting a terminal is formed on the cover plate, and the terminal is used for being connected with a coil lead. The terminal and the coil can be firstly installed on the open cover plate, so that the operation is more convenient, the coil and the terminal can be fixed on the cover plate after the cover plate is filled with glue, and the coil and the terminal are assembled with the base after the glue is cured; besides, the middle of the base and the middle of the cover plate are respectively provided with a first protruding column and a second protruding column which are connected in an inserted mode and are hollow, an annular step is formed on the inner wall of the first protruding column, and a second protruding block abutting against the annular step is formed on the second protruding column, so that axial limiting is achieved when the base and the cover plate are inserted in an inserted mode. The cover closing position of the cover plate and the base can be accurately controlled, and the sealing performance is better.

Description

Technical Field

[0001] This utility model relates to the field of current transformer technology, specifically to a housing structure for a current transformer. Background Technology

[0002] A through-type current transformer typically consists of an interlocking base and a cover plate. One side of the base has an integrally formed mounting plate for fixing to sheet metal. Considering the installation firmness and structural stability of the transformer, a wide mounting plate is usually used to increase the contact area with the sheet metal. This also increases the depth of the base, which is integrally injection molded with the mounting plate. The bottom of the base has a dedicated slot for installing the two terminals of the coil. After the coil is placed in the base, the worker needs to manually press the two terminals accurately into the bottom mounting slot in a narrow space. The limited operating space makes it difficult and prone to causing the terminals to be installed in the wrong position, affecting the assembly quality and production efficiency of the product. Utility Model Content

[0003] Therefore, the technical problem to be solved by this utility model is to overcome the defects in the prior art, thereby providing a housing structure for a current transformer that is easy to install.

[0004] Therefore, this utility model provides a housing structure for a current transformer, including a base and a cover plate. One side of the base is provided with a mounting plate fixed to sheet metal. The depth of the cover plate is less than the depth of the base. The cover plate is formed with a mounting groove for mounting terminals. The terminals are used to connect with coil leads. After the coil is mounted on the cover plate, it is fixed to the cover plate by potting glue. The middle part of the base and the cover plate are respectively provided with a first protrusion and a second protrusion that are hollow and interlocked. The inner wall of the first protrusion is formed with an annular step, and the second protrusion is formed with a second protrusion that abuts against the annular step.

[0005] The base includes a base plate, a mounting plate perpendicularly disposed on the base plate, and two opposing side plates. One side of the two side plates is the mounting plate, and the other side forms a first opening. A guide structure is provided between the cover plate and the base for the first protrusion and the second protrusion to be inserted into each other. The guide structure includes: a guide rib formed on the inner wall of the two side plates adjacent to the first opening, the extension direction of the guide rib being perpendicular to the base plate; and a baffle disposed on one side of the cover plate and extending toward the base plate. The baffle slides along the guide rib into the first opening, and the baffle, the two side plates, and the mounting plate enclose a receiving cavity for placing the coil.

[0006] The baffle has protruding edges on both sides, which can slide against the first end face of the corresponding side plate.

[0007] The base plate has a first slot formed for inserting the end of the baffle away from the cover plate.

[0008] A reinforcing rib is provided between the baffle and the base plate.

[0009] A protective cover for shielding the terminals is detachably installed on the outer wall of the cover plate.

[0010] The protective cover is fixed to the cover plate by screws, and the screws and the protective cover are respectively formed with a first through hole and a second through hole for the lead sealing wire to pass through.

[0011] The technical solution of this utility model has the following advantages:

[0012] 1. The housing structure of the current transformer provided by this utility model has a mounting groove for installing terminals on the cover plate. Since the cover plate is shallow and has a wide operating space, the terminals and coils can be installed on the open cover plate first during assembly, which makes the operation more convenient. After the cover plate is filled with glue, the coils and terminals can be fixed on the cover plate and assembled with the base after the glue has cured. In addition, the middle part of the base and the cover plate are respectively provided with a first protrusion and a second protrusion that are hollow and interlocked. The inner wall of the first protrusion is formed with an annular step, and the second protrusion is formed with a second protrusion that abuts against the annular step. The above structure realizes the axial limit when the two are interlocked, which can accurately control the closing position of the cover plate and the base, and the sealing performance is better.

[0013] 2. The housing structure of the current transformer provided by this utility model has a first opening formed on the side of the base, and guide ribs formed on the inner walls of the two side plates adjacent to the first opening. The extension direction of the guide ribs is perpendicular to the base plate. A baffle extending towards the base plate is formed on one side of the cover plate. During assembly, the baffle slides along the guide ribs and is inserted into the first opening. In this way, it plays a guiding and positioning role before the first and second protrusions are inserted and during the insertion process. Compared with the prior art, it is faster and more accurate, avoiding the tedious operation of aligning the traditional positioning protrusions with the grooves, and greatly improving the assembly efficiency and accuracy. In addition, after the baffle slides into place, it itself becomes part of the receiving cavity. It, together with the two side plates and the mounting plate, forms a complete coil receiving space, realizing the functional integration of guidance and forming, which makes the structure simpler.

[0014] 3. The housing structure of the current transformer provided by this utility model has protruding edges on both sides of the baffle, and the protruding edges slide against the first end face of the side plate. This structure plays a dual role of limiting and guiding, which not only further ensures the smoothness and directionality when the cover plate is inserted, but also allows the protruding edges to fit against the end face of the side plate after assembly, increasing the tightness and stability of the connection between the cover plate and the base, and preventing lateral shaking. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a perspective view of the current transformer of this utility model;

[0017] Figure 2 This is a schematic diagram of the exploded structure of a current transformer;

[0018] Figure 3 This is a 3D view of the base;

[0019] Figure 4 This is a three-dimensional view of the cover plate;

[0020] Figure 5 This is a cross-sectional view of a current transformer;

[0021] Figure 6 for Figure 5 A magnified structural diagram of part A in the middle;

[0022] Figure 7 This is a cross-sectional view of a current transformer;

[0023] Figure 8 This is a 3D view of the protective cover.

[0024] Explanation of reference numerals in the attached drawings: 1. Base; 2. Cover plate; 3. First protrusion; 4. Second protrusion; 5. Base plate; 6. Mounting support plate; 7. Side plate; 8. First opening; 9. Guide rib; 10. Baffle; 11. Receiving cavity; 12. Protruding edge; 13. First end face; 14. First slot; 21. Reinforcing rib; 22. Terminal; 23. Mounting groove; 24. Annular step; 25. Second protrusion; 26. Protective cover; 27. Screw; 28. First through hole; 29. ​​Second through hole. Detailed Implementation

[0025] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0029] Example

[0030] This embodiment provides a housing structure for a current transformer, such as... Figure 1 As shown, it includes a base 1 and a cover plate 2.

[0031] Base 1, such as Figure 2 and Figure 3 As shown, it includes a base plate 5, a mounting plate 6 perpendicularly disposed on the base plate 5, and two oppositely disposed side plates 7. One side of the two side plates 7 is the mounting plate 6, and the other side forms a first opening 8. The mounting plate 6 is used to fix to the sheet metal.

[0032] The depth of cover plate 2 is less than the depth of base 1, such as... Figure 4 As shown, the cover plate 2 has a mounting groove 23 for mounting a terminal 22. The terminal 22 is used to connect to the coil lead. After the coil is mounted on the cover plate 2, it is fixed to the cover plate 2 by potting glue.

[0033] like Figure 7As shown, the base 1 and the cover plate 2 are respectively provided with a hollow first protrusion 3 and a second protrusion 4 that are interlocked. An annular step 24 is formed on the inner wall of the first protrusion 3, and a second protrusion 25 that abuts against the annular step 24 is formed on the second protrusion 4. A guide structure is provided between the cover plate 2 and the base 1 when the first protrusion 3 and the second protrusion 4 are interlocked, such as... Figure 5 and Figure 6 As shown, the guiding structure includes: a guide rib 9, formed on the inner wall of the two side plates 7 adjacent to the first opening 8, the extending direction of the guide rib 9 being perpendicular to the bottom plate 5; a baffle 10, disposed on one side of the cover plate 2 and extending towards the bottom plate 5, the baffle 10 slidingly inserted into the first opening 8 along the guide rib 9, and the baffle 10, together with the two side plates 7 and the mounting support plate 6, forming a receiving cavity 11 for placing the coil. The baffle 10 has protruding edges 12 on both sides, the protruding edges 12 being slidably abutting against the first end face 13 of the corresponding side plate 7, such as... Figure 4 As shown, a reinforcing rib 21 is provided between the baffle 10 and the base plate 5, such as... Figure 3 As shown, the base plate 5 has a first slot 14 formed on it for inserting the end of the baffle 10 away from the cover plate 2.

[0034] A protective cover 26 for shielding the terminal 22 is detachably installed on the outer wall of the cover plate 2, such as... Figure 8 As shown, the protective cover 26 is fixed to the cover plate 2 by screws 27. The screws 27 and the protective cover 26 are respectively formed with a first through hole 28 and a second through hole 29 for the lead sealing wire to pass through.

[0035] The housing structure of the current transformer provided by this utility model has a mounting groove 23 for mounting terminals 22 set on the cover plate 2. Since the cover plate 2 is shallow and has a wide operating space, the terminals 22 and the coil can be installed on the open cover plate 2 first during assembly, which makes the operation more convenient. After the cover plate 2 is filled with glue, the coil and terminals 22 can be fixed on the cover plate 2. After the glue cures, it can be assembled with the base. In addition, the middle part of the base 1 and the cover plate 2 are respectively provided with a first protrusion 3 and a second protrusion 4 that are hollow and interlocked. The inner wall of the first protrusion 3 is formed with an annular step 24, and the second protrusion 4 is formed with a second protrusion 25 that abuts against the annular step 24. The above structure realizes the axial limit when the two are interlocked, which can accurately control the closing position of the cover plate 2 and the base 1, and the sealing performance is better.

[0036] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A housing structure for a current transformer, characterized in that, The device includes a base (1) and a cover plate (2). The base (1) has a mounting plate (6) fixed to the sheet metal on one side. The depth of the cover plate (2) is less than the depth of the base (1). The cover plate (2) has a mounting groove (23) for mounting a terminal (22). The terminal (22) is used to connect with the coil lead. After the coil is installed on the cover plate (2), it is fixed to the cover plate (2) by potting glue. The middle part of the base (1) and the cover plate (2) are respectively provided with a first protrusion (3) and a second protrusion (4) that are hollow and interlocked. The inner wall of the first protrusion (3) is formed with an annular step (24). The second protrusion (4) is formed with a second protrusion (25) that abuts against the annular step (24).

2. The housing structure of the current transformer according to claim 1, characterized in that, The base (1) includes a base plate (5), a mounting plate (6) vertically disposed on the base plate (5), and two opposing side plates (7). One side of the two side plates (7) is the mounting plate (6), and the other side forms a first opening (8). A guide structure is provided between the cover plate (2) and the base (1) for the first protrusion (3) and the second protrusion (4) to be inserted. The guide structure includes: Guide ribs (9) are formed on the inner walls of the two side plates (7) adjacent to the first opening (8), and the extension direction of the guide ribs (9) is perpendicular to the bottom plate (5). A baffle (10) is provided on one side of the cover plate (2) and extends toward the bottom plate (5). The baffle (10) slides into the first opening (8) along the guide rib (9), and the baffle (10), together with the two side plates (7) and the mounting support plate (6), forms a receiving cavity (11) for placing the coil.

3. The housing structure of the current transformer according to claim 2, characterized in that, The baffle (10) has protruding edges (12) on both sides, and the protruding edges (12) can slide against the first end face (13) of the corresponding side plate (7).

4. The housing structure of the current transformer according to claim 2 or 3, characterized in that, The base plate (5) has a first slot (14) formed on it for the end of the baffle (10) away from the cover plate (2) to be inserted.

5. The housing structure of the current transformer according to claim 4, characterized in that, A reinforcing rib (21) is provided between the baffle (10) and the bottom plate (5).

6. The housing structure of the current transformer according to claim 1, characterized in that, A protective cover (26) for shielding the terminal (22) is detachably installed on the outer wall of the cover plate (2).

7. The housing structure of the current transformer according to claim 6, characterized in that, The protective cover (26) is fixed to the cover plate (2) by screws (27). The screws (27) and the protective cover (26) are respectively formed with a first through hole (28) and a second through hole (29) for the lead sealing wire to pass through.

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