CN218585743U - Compact structure's miniature open-close type current transformer - Google Patents
Compact structure's miniature open-close type current transformer Download PDFInfo
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- CN218585743U CN218585743U CN202222530949.5U CN202222530949U CN218585743U CN 218585743 U CN218585743 U CN 218585743U CN 202222530949 U CN202222530949 U CN 202222530949U CN 218585743 U CN218585743 U CN 218585743U
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Abstract
The utility model discloses a miniature open-close type current transformer with compact structure, which comprises an upper half shell and a lower half shell, wherein the upper half shell is internally provided with an upper half iron core, and the lower half shell is internally provided with a lower half iron core; a cover plate is arranged at the upper end opening part of the lower half shell, notches are respectively arranged at the left side part and the right side part of the cover plate, a lower concave arc surface is arranged in the middle of the cover plate along the front-back direction, and inverted U-shaped openings are respectively arranged on the front side wall and the rear side wall of the upper half shell; the lower end parts of the front side wall and the rear side wall of the upper half shell are respectively provided with a pair of lateral positioning blocks which are respectively arranged at the two sides of the opening part of the inverted U-shaped opening, the left side part and the right side part of the cover plate are respectively provided with a pair of lateral limiting sunken grooves which are respectively arranged at the two sides of the notch, and after the upper half shell and the lower half shell are closed, the lateral positioning blocks on the upper half shell are correspondingly positioned in the lateral limiting sunken grooves of the cover plate. The utility model provides high miniature open-close type current transformer's measurement accuracy.
Description
Technical Field
The utility model relates to a current transformer technical field, concretely relates to compact structure's miniature open-close type current transformer.
Background
The current transformer is composed of a closed iron core and a coil (induction coil), wherein the coil is wound on the iron core, and the current transformer is an instrument for realizing current measurement by converting a large primary side current into a small secondary side current according to the electromagnetic induction principle.
The current transformers are of various types, and typically comprise closed current transformers and open-close current transformers. The open-close type current transformer can measure current under the condition that a tested line is not required to be disconnected, and is convenient to use and wide in application. The miniature open-close type current transformer is mainly used for the use occasions with limited measuring space.
However, the existing miniature open-close type current transformer has the following problems: due to the fact that the iron core is too small, end faces are not easy to align, performance is poor, and therefore measuring accuracy of the miniature open-close type current transformer is affected.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a compact structure's miniature open-close type current transformer aims at improving miniature open-close type current transformer's measurement accuracy. The specific technical scheme is as follows:
a miniature open-close type current transformer with a compact structure comprises an upper half shell and a lower half shell which are mutually rotated, closed and connected through a hinge shaft connecting structure, wherein an upper half iron core is arranged in the upper half shell, and a lower half iron core which is closed with the upper half iron core is arranged in the lower half shell; the upper end opening part of the lower half shell is provided with a cover plate, the left side part and the right side part of the cover plate are respectively provided with a notch for the involutory connection of the upper half iron core and the lower half iron core, the middle of the cover plate is provided with a concave circular arc surface along the front-back direction, the front side wall and the back side wall of the upper half shell are respectively provided with an inverted U-shaped opening, when the upper half shell and the lower half shell are involutory, the upper half iron core and the lower half iron core are involutory at the same time, and the inverted U-shaped openings and the concave circular arc surfaces are mutually involutory to form a power line detection hole through which a power line can pass; the lower end parts of the front side wall and the rear side wall of the upper half shell are respectively provided with a pair of lateral positioning blocks, the lateral positioning blocks are respectively arranged at two side positions of an opening part of the inverted U-shaped opening, the left side part and the right side part of the cover plate are respectively provided with a pair of lateral limiting sinking grooves, the lateral limiting sinking grooves are respectively arranged at two side positions of the notch, and after the upper half shell and the lower half shell are closed, the lateral positioning blocks on the upper half shell are correspondingly positioned in the lateral limiting sinking grooves of the cover plate.
The further improvement scheme is as follows: the lateral positioning block is arranged on the upper half shell, and the upper half shell and the lower half shell are aligned to each other and automatically centered and positioned in the front-back direction through the transition inclined plane of the lateral positioning block.
The utility model discloses in keep away from on the first half casing one side of hinge connection structure is provided with snap ring keep away from on the second half casing one side of hinge connection structure is provided with the fixture block, first half casing with it is when lower half casing is right time snap ring with the mutual buckle of fixture block is connected.
The utility model discloses in, first iron core and second iron core are the U-shaped iron core.
In the utility model, an iron core positioning component is arranged inside the lower half shell, the iron core positioning component comprises an upper positioning piece and a lower positioning piece which are mutually buckled and connected from top to bottom, a rectangular positioning hole is formed between the upper positioning piece and the lower positioning piece, and a section of iron core in the middle of the lower half iron core is positioned in the rectangular positioning hole; the upper positioning piece and the lower positioning piece are combined to form an annular winding space for winding a coil.
Preferably, the upper positioning part comprises a pair of vertical plates and a bottom plate integrally connected between the vertical plates, a pair of horizontal positioning plates are arranged at the front and rear sides of the upper parts of the vertical plates, and an iron core positioning groove is formed between the horizontal positioning plates and the outer side surfaces of the vertical plates; and a section of iron core at the end part of the lower half iron core is positioned in the iron core positioning groove.
Preferably, the four corners of the cover plate are respectively provided with an elastic hook vertically downwards, a rectangular clamping hole is arranged at a position on the horizontal positioning plate corresponding to the elastic hook, and the elastic hook is mutually connected with the rectangular clamping hole in a buckling manner.
Preferably, a pair of clamping feet are respectively arranged at the front side and the rear side of the lower end of the vertical plate of the upper positioning piece, the lower positioning piece comprises a horizontal supporting plate and elastic snap rings which are vertically arranged at the four corners of the horizontal supporting plate, and the clamping feet on the upper positioning piece are mutually connected with the elastic snap rings on the lower positioning piece in a buckling manner.
In the utility model, the bottom of the lower half shell is provided with a pair of jacks and a pair of barbs, the left side and the right side of the horizontal support plate are respectively provided with a pair of vertical plates vertically downwards, and the front side and the rear side of the lower end of each vertical plate are provided with a pair of positioning support feet which are contacted with the inner bottom surface of the lower half shell; the lower extreme of riser still is provided with the location picture peg perpendicularly, the location picture peg is pegged graft on the jack of half lower casing, just the barb of half lower casing bottom catches on the up end of location picture peg.
In the utility model, the bottom of the lower half shell is provided with the wiring hole of the lead-out wire.
The utility model has the advantages that:
first, the utility model discloses a compact structure's miniature open-close type current transformer, on the basis of adopting hinge connection structure between upper half casing and lower half casing, still set up four side direction locating pieces on upper half casing, set up four side direction spacing heavy grooves in the corresponding position of the apron of lower half casing simultaneously, realized from this that upper half casing and lower half casing rotate the accurate location when to, to the good reliability that closes, improve miniature open-close type current transformer's measurement accuracy from this.
Second, the utility model discloses a compact structure's miniature open-close type current transformer is provided with the transition inclined plane on the lateral surface of side direction locating piece, first casing can realize first casing through the transition inclined plane on the side direction locating piece with lower casing when the opposite, the automatic centering location of front and back direction has improved current measurement's efficiency from this.
Third, the utility model discloses a compact structure's miniature open-close type current transformer, apron on the lower half casing adopt the lower concave arc surface of the relative less shallow of degree of depth, and the relative darker U-shaped opening of inversion of degree of depth has formed the power line inspection hole when closing on the cooperation first casing, and this kind of structural design has increased the usable space of lower half casing inside.
Fourth, the utility model discloses a compact structure's miniature open-close type current transformer, the inside of lower half casing is provided with iron core positioning component, through the unique structural design of iron core positioning component for casing inner space make full use of, and make iron core subassembly more reliable in the inside installation location of casing.
Drawings
Fig. 1 is a schematic structural view (in an open state) of a compact miniature open-close type current transformer of the present invention;
FIG. 2 is a schematic view of the upper half of FIG. 1 with the lower half of FIG. 1 removed;
FIG. 3 is a schematic view of the cover plate structure of FIGS. 1 and 2;
fig. 4 is a schematic view of the structure of fig. 2 with the cover plate and the lower core half removed;
FIG. 5 is a schematic structural view of the upper positioning member in FIG. 4;
FIG. 6 is a schematic structural view of the lower positioning member of FIG. 4;
FIG. 7 is a schematic structural view of the lower housing half;
fig. 8 is a schematic structural diagram (in a folding state) of a compact miniature open-close type current transformer according to the present invention.
In the figure: 1. hinge connection structure, 2, upper half shell, 3, lower half shell, 4, upper half iron core, 5, lower half iron core, 6, cover plate, 7, notch, 8, concave arc surface, 9, inverted U-shaped opening, 10, power line detection hole, 11, lateral positioning block, 12, lateral limiting sinking groove, 13, transition inclined surface, 14, elastic snap ring, 15, clamping block, 16, iron core positioning component, 17, upper positioning piece, 18, lower positioning piece, 19, rectangular positioning hole, 20, vertical plate, 21, bottom plate, 22, horizontal positioning plate, 23, iron core positioning groove, 24, elastic clamping hook, 25, rectangular clamping hole, 26, clamping pin, 27, horizontal supporting plate, 28, elastic snap ring, 29, jack, 30, barb, 31, vertical plate, 32, positioning supporting pin, 33, positioning insertion plate, 34, outgoing line, 35, wiring hole, 36 and annular winding space.
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Fig. 1 to 8 show an embodiment of a compact miniature open-close type current transformer according to the present invention, which includes an upper half casing 2 and a lower half casing 3 connected to each other by a hinge connection structure 1, wherein the upper half casing 2 is provided with an upper half iron core 4, and the lower half casing 3 is provided with a lower half iron core 5 opposite to the upper half iron core 4; a cover plate 6 is arranged at an upper end opening of the lower half shell 3, notches 7 for connection of the upper half iron core 4 and the lower half iron core 5 in an involutive manner are respectively formed in the left side and the right side of the cover plate 6, a lower concave arc surface 8 is arranged in the middle of the cover plate 6 along the front-back direction, inverted U-shaped openings 9 are respectively formed in the front side wall and the rear side wall of the upper half shell 2, when the upper half shell 2 and the lower half shell 3 are involutive, the upper half iron core 4 and the lower half iron core 5 are involutive at the same time, and the inverted U-shaped openings 9 and the lower concave arc surface 8 are involutive with each other to form a power line detection hole 10 through which a power line can pass; a pair of lateral positioning blocks 11 is respectively arranged at the lower end of the front and rear side walls of the upper half shell 2, the lateral positioning blocks 11 are respectively arranged at two sides of the mouth of the inverted U-shaped opening 9, a pair of lateral limiting sinking grooves 12 are respectively arranged at the left and right sides of the cover plate 6, the lateral limiting sinking grooves 12 are respectively arranged at two sides of the notch 7, and the lateral positioning blocks 11 on the upper half shell 2 are correspondingly positioned in the lateral limiting sinking grooves 12 of the cover plate 6 after the upper half shell 2 and the lower half shell 3 are closed.
The further improvement scheme is as follows: a transition inclined plane 13 is arranged on the outer side surface of the lateral positioning block 11, and when the upper half shell 2 and the lower half shell 3 are combined, the upper half shell 2 and the lower half shell 3 are automatically centered and positioned in the front-back direction through the transition inclined plane 13 of the lateral positioning block 11.
In this embodiment, an elastic snap ring 14 is disposed on one side of the upper half casing 2 away from the hinge connection structure 1, a fixture block 15 is disposed on one side of the lower half casing 3 away from the hinge connection structure 1, and the elastic snap ring 14 and the fixture block 15 are mutually connected by snap-fit when the upper half casing 2 and the lower half casing 3 are aligned.
In this embodiment, the upper half iron core 4 and the lower half iron core 5 are both U-shaped iron cores.
In this embodiment, an iron core positioning assembly 16 is disposed inside the lower half casing 3, the iron core positioning assembly 16 includes an upper positioning member 17 and a lower positioning member 18 that are connected to each other in a vertically buckled manner, a rectangular positioning hole 19 is formed between the upper positioning member 17 and the lower positioning member 18, and a middle iron core section of the lower half iron core 5 is positioned in the rectangular positioning hole 19; the upper positioning piece 17 and the lower positioning piece 18 are combined to form an annular winding space 36 for winding a coil.
Preferably, the upper positioning member 17 includes a pair of vertical plates 20 and a bottom plate 21 integrally connected between the pair of vertical plates 20, a pair of horizontal positioning plates 22 are disposed at front and rear side positions of an upper portion of the vertical plates 20, and a core positioning groove 23 is formed between the pair of horizontal positioning plates 22 and an outer side surface of the vertical plate 20; the iron core of the end part section of the lower half iron core 5 is positioned in the iron core positioning groove 23.
Preferably, the four corners of the cover plate 6 are respectively provided with an elastic hook 24 vertically downward, a rectangular locking hole 25 is provided at a position on the horizontal positioning plate 22 corresponding to the elastic hook 24, and the elastic hook 24 and the rectangular locking hole 25 are mutually connected in a snap-fit manner.
Preferably, a pair of clamping feet 26 are respectively arranged at the front and rear sides of the lower end of the vertical plate 20 of the upper positioning member 17, the lower positioning member 18 comprises a horizontal supporting plate 27 and elastic snap rings 28 vertically arranged at the four corners of the horizontal supporting plate 27, and the clamping feet 26 on the upper positioning member 17 and the elastic snap rings 28 on the lower positioning member 18 are mutually connected in a snap-fit manner.
In this embodiment, the bottom of the lower half shell 3 is provided with a pair of insertion holes 29 and a pair of barbs 30, the left and right sides of the horizontal support plate 27 are respectively provided with a pair of vertical plates 31 standing downward, and the front and rear sides of the lower end of the vertical plate 3 are provided with a pair of positioning support legs 32 contacting with the inner bottom surface of the lower half shell 3; a positioning insertion plate 33 is vertically arranged at the lower end of the vertical plate 3, the positioning insertion plate 33 is inserted into the insertion hole 29 of the lower half shell 3, and the barb 30 at the bottom of the lower half shell 3 hooks the upper end surface of the positioning insertion plate 33.
In this embodiment, the bottom of the lower case half 3 is provided with a wiring hole 35 for a lead wire.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A miniature open-close type current transformer with a compact structure is characterized by comprising an upper half shell and a lower half shell which are mutually rotated, closed and connected through a hinge shaft connecting structure, wherein an upper half iron core is arranged in the upper half shell, and a lower half iron core which is closed and connected with the upper half iron core is arranged in the lower half shell; a cover plate is arranged at the upper end opening part of the lower half shell, notches for the involutory connection of the upper half iron core and the lower half iron core are respectively arranged at the left side part and the right side part of the cover plate, a lower concave arc surface is arranged in the middle of the cover plate along the front-back direction, inverted U-shaped openings are respectively arranged on the front side wall and the rear side wall of the upper half shell, when the upper half shell is involutory with the lower half shell, the upper half iron core and the lower half iron core are involutory at the same time, and the inverted U-shaped openings and the lower concave arc surface are mutually involutory to form a power line detection hole through which a power line can pass; the lower end parts of the front side wall and the rear side wall of the upper half shell are respectively provided with a pair of lateral positioning blocks, the lateral positioning blocks are respectively arranged at two side positions of an opening part of the inverted U-shaped opening, the left side part and the right side part of the cover plate are respectively provided with a pair of lateral limiting sinking grooves, the lateral limiting sinking grooves are respectively arranged at two side positions of the notch, and after the upper half shell and the lower half shell are closed, the lateral positioning blocks on the upper half shell are correspondingly positioned in the lateral limiting sinking grooves of the cover plate.
2. The miniature open-close type current transformer of claim 1, wherein a transition inclined plane is disposed on an outer side surface of the lateral positioning block, and when the upper half casing and the lower half casing are aligned, the upper half casing and the lower half casing are automatically centered and positioned in a front-back direction through the transition inclined plane of the lateral positioning block.
3. The compact miniature open-close type current transformer according to claim 1, wherein an elastic snap ring is disposed on a side of said upper half shell away from said hinge connection structure, a clamping block is disposed on a side of said lower half shell away from said hinge connection structure, and when said upper half shell and said lower half shell are aligned, said elastic snap ring and said clamping block are mutually fastened and connected.
4. The compact miniature open-close type current transformer of claim 1, wherein the upper half iron core and the lower half iron core are both U-shaped iron cores.
5. The compact miniature open-close type current transformer of claim 4, wherein an iron core positioning assembly is arranged inside the lower half shell, the iron core positioning assembly comprises an upper positioning piece and a lower positioning piece which are buckled and connected up and down, a rectangular positioning hole is formed between the upper positioning piece and the lower positioning piece, and an iron core in the middle section of the lower half iron core is positioned in the rectangular positioning hole; the upper positioning piece and the lower positioning piece are combined to form an annular winding space for winding a coil.
6. The compact miniature open-close type current transformer of claim 5, wherein the upper positioning member comprises a pair of vertical plates and a bottom plate integrally connected between the vertical plates, a pair of horizontal positioning plates are arranged at the front and rear sides of the upper part of each vertical plate, and an iron core positioning groove is formed between each horizontal positioning plate and the outer side surface of each vertical plate; and a section of iron core at the end part of the lower half iron core is positioned in the iron core positioning groove.
7. The compact miniature open-close type current transformer as claimed in claim 6, wherein said cover plate has four corners each having a downward elastic hook, said horizontal positioning plate has a rectangular hole corresponding to said elastic hook, and said elastic hook and said rectangular hole are connected by a snap-fit.
8. The compact miniature open-close type current transformer as claimed in claim 6, wherein a pair of locking legs are respectively disposed at front and rear sides of a lower end of a vertical plate of said upper positioning member, said lower positioning member comprises a horizontal support plate and elastic buckles vertically disposed at four corners of said horizontal support plate, and said locking legs of said upper positioning member and said elastic buckles of said lower positioning member are mutually connected by a snap fit.
9. The miniature compact open-close type current transformer according to claim 8, wherein the bottom of the lower half shell is provided with a pair of jacks and a pair of barbs, the left and right sides of the horizontal support plate are respectively provided with a pair of vertical plates vertically standing downwards, and the front and rear side parts of the lower end of the vertical plate are provided with a pair of positioning support legs contacting with the inner bottom surface of the lower half shell; the lower extreme of riser still is provided with the location picture peg perpendicularly, the location picture peg is pegged graft on the jack of half lower casing, just the barb of half lower casing bottom catches on the up end of location picture peg.
10. The compact miniature open-close type current transformer according to claim 1, wherein the bottom of said lower half shell is provided with a wiring hole for leading-out wires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222530949.5U CN218585743U (en) | 2022-09-24 | 2022-09-24 | Compact structure's miniature open-close type current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222530949.5U CN218585743U (en) | 2022-09-24 | 2022-09-24 | Compact structure's miniature open-close type current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218585743U true CN218585743U (en) | 2023-03-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222530949.5U Active CN218585743U (en) | 2022-09-24 | 2022-09-24 | Compact structure's miniature open-close type current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218585743U (en) |
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2022
- 2022-09-24 CN CN202222530949.5U patent/CN218585743U/en active Active
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