CN203858970U - Miniature mutual inductor - Google Patents
Miniature mutual inductor Download PDFInfo
- Publication number
- CN203858970U CN203858970U CN201420217902.6U CN201420217902U CN203858970U CN 203858970 U CN203858970 U CN 203858970U CN 201420217902 U CN201420217902 U CN 201420217902U CN 203858970 U CN203858970 U CN 203858970U
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- pillow block
- round key
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- plastics
- cylinder
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Abstract
The utility model discloses a miniature mutual inductor which comprises a plastic part, a heat shrink tube, a primary current line, an iron core wound by a secondary current coil and a cylindrical key with a plummer block. The iron core wound by the secondary current coil is of a center-hollowed cylinder structure, the cross section of the iron core wound by the secondary current coil is in a circle shape, and the cylindrical key with the plummer block, the plastic part, the heat shrink tube, the primary current line and the iron core wound by the secondary current coil are assembled together. According to the miniature mutual inductor and a packaging and manufacturing method of the miniature mutual inductor, the cylindrical key with the plummer block is formed by rubber or silicone rubber in a pressing mode and used for supporting and stabilizing the primary current line, and the cylindrical key with the plummer block, the plastic part, the heat shrink tube, the primary current line and the iron core wound by the secondary current coil are assembled together and matched with each other tightly. Compared with the prior art, the miniature mutual inductor has the advantages of being simple in structure and simplified in manufacturing process. Furthermore, the mutual inductor is high in packaging and manufacturing speed, stable in insulation performance and reliable in quality.
Description
Technical field
The utility model relates to instrument transformer technical field, is specifically related to electronic electric energy meter metering micro mutual inductor.
Background technology
Instrument transformer is the device of a kind of employing that electrical quantity is isolated, metering or measurement, and micro mutual inductor is particularly useful for electronic electric energy meter, miniature electric current (voltage) instrument transformer product nearly cover the various aspects of whole electrical energy system application.
Present this micro mutual inductor is that the iron core, the plastic housing central authorities that are wound with secondary coil arrange and can consist of the through hole of primary current line, with the method manufacture of epoxy resin encapsulated.The instrument transformer that this method is manufactured, the through hole phase close-fitting that primary current line must arrange with plastic housing central authorities just can make the fixing not swing of instrument transformer, when using U font as primary current line, must add large through-hole or reduce thickness and could pass instrument transformer, also need instrument transformer to fix simultaneously.
Also electric current line once, is wound with the iron core of secondary coil, and plastic housing forms.Primary current line is first put into plastic housing location and manufactured by the method for epoxy resin encapsulated by being wound with after the mesopore of secondary coil iron core whole assembly.The instrument transformer of this method manufacture is particularly easy to produce three instrument transformer selfcapacity skewness problems in three-phase electric energy meter application, and measuring accuracy that cannot correcting electric energy meter.
Also has a kind of instrument transformer, primary current line cover has heat-shrink tube to make insulating barrier, the iron core that is wound with secondary coil is wound with insulating tape in appearance, again in heat-shrink tube contracting envelope for outer surface, by primary current line first by being wound with after the mesopore of secondary coil iron core, in mesopore with the fixing primary current line of epoxy resin.Although the instrument transformer of this method manufacture can solve three instrument transformer selfcapacity skewness problems, humidity resistance is poor, and productive labor intensity is large, and easily damaged.
Given this, need to design the micro mutual inductor of a kind of simple in structure, simplified manufacturing process, stable performance, the capacitance problem causing to overcome the filling resin of instrument transformer.
Utility model content
In order to solve the problems of the technologies described above, the utility model provides a kind of micro mutual inductor, micro mutual inductor comprises working of plastics, heat-shrink tube, primary current line, be wound with iron core and the band pillow block round key of secondary current coil, the iron core that is wound with secondary current coil is axle center hollow circuit cylinder body structure, the cross section that is wound with the iron core of secondary current coil is circular, band pillow block round key and working of plastics, heat-shrink tube, primary current line, be wound with the iron core assembly of secondary current coil, wherein, band pillow block round key adopts elastomeric material compressing, it in it, is middle through hole, internal spline structure.Band pillow block round key adopts rubber to make, and has soft and elasticity, can make primary current line be easy to pack into and closely cooperate with it, and band pillow block round key can also well support firm primary current line.The micro mutual inductor with this structure can solve the problems such as complex structure in prior art, insulation property be unstable, and its encapsulation making method has overcome the capacitance problem that in prior art, resin-encapsulated causes.
To achieve these goals, the utility model adopts following technical scheme.
A kind of micro mutual inductor, comprise working of plastics, heat-shrink tube, primary current line, be wound with the iron core of secondary current coil and be with pillow block round key, the iron core that is wound with secondary current coil is axle center hollow circuit cylinder body structure, the cross section that is wound with the iron core of secondary current coil is circular, with pillow block round key and working of plastics, heat-shrink tube, primary current line, be wound with the iron core assembly of secondary current coil.
Preferably, described with pillow block round key be top cylinder pillow block, the middle part cylinder shaft shoulder, lower cylindrical body, inside in the integrative-structure of through hole, and adopt elastomeric material or silastic material compressing.
In above-mentioned arbitrary technical scheme, preferably, the described middle through hole with pillow block round key is made as internal splined hole structure.
In above-mentioned arbitrary technical scheme preferably, described internal spline be shaped as vertical tooth or U-shaped tooth.
In above-mentioned arbitrary technical scheme, preferably, described working of plastics is hull shape, hollow inside, and bottom center is established hole, and housing one side is established secondary current lead-out wire leadout hole.
In above-mentioned arbitrary technical scheme, preferably, described working of plastics adopts any one material in ABS, PVC or PC material also compressing.
In above-mentioned arbitrary technical scheme preferably, the described cylinder with pillow block round key from working of plastics bottom center through hole, insert and with working of plastics close fit.
In above-mentioned arbitrary technical scheme preferably, the described cylinder pillow block with pillow block round key insert in working of plastics bottom center through hole and with working of plastics close fit.
In above-mentioned arbitrary technical scheme preferably, described band pillow block round key and working of plastics are extrapolation assembling, with the cylinder pillow block of pillow block round key,, the external diameter of the cylinder shaft shoulder and plastic parts base apertures closely cooperate mutually, the iron core that is wound with secondary current coil is inserted in working of plastics shell and is set on the cylinder with pillow block round key.
In above-mentioned arbitrary technical scheme preferably, described band pillow block round key and working of plastics are built-in assembling, with the cylinder pillow block of pillow block round key,, the external diameter of the cylinder shaft shoulder and plastic parts base apertures closely cooperate mutually, the iron core that is wound with secondary current coil is inserted in working of plastics shell and is set on the cylinder with pillow block round key.
In above-mentioned arbitrary technical scheme preferably, described with the assembling of pillow block round key and working of plastics extrapolation and with the iron core assembling that is wound with secondary current coil, one end of primary current line from cylinder pillow block with pillow block round key insert, through through hole wherein and pass from cylinder one side, draw at the two ends of primary current line, and the middle part of primary current line is placed in band pillow block round key through hole and closely cooperates with it.
In above-mentioned arbitrary technical scheme preferably, described with pillow block round key and the built-in assembling of working of plastics and with the iron core assembling that is wound with secondary current coil, one end of primary current line from cylinder pillow block with pillow block round key insert, through through hole wherein and pass from cylinder one side, draw at the two ends of primary current line, and the middle part of primary current line is placed in band pillow block round key through hole and closely cooperates with it.
In above-mentioned arbitrary technical scheme, preferably, described primary current line is U-shaped.
The invention also discloses a kind of encapsulation making method of micro mutual inductor, comprise micro mutual inductor as above, concrete grammar is as follows: the first step, and make respectively with pillow block round key, working of plastics, be wound with the iron core of secondary current coil; Second step, successively by with pillow block round key, plastic housing, be wound with the iron core assembling of secondary current coil; The 3rd step, inserts band pillow block round key by one end of U-shaped primary current line and from wherein passing through hole, the two ends of U-shaped primary current line are exposed, and its U-shaped bottom is placed in the through hole of pillow block round key and with band pillow block round key and closely cooperates; The 4th step, draws secondary current line from working of plastics secondary current lead-out wire leadout hole, and one end of the personal pressure-wire of electric energy meter is welded on U-shaped primary current line and fit on heat-shrink tube with protection pressure-wire; Finally, in working of plastics hollow housing, pour into epoxy resin, after having encapsulated.
In above-mentioned arbitrary technical scheme preferably, the described cylinder with pillow block round key inserts from working of plastics bottom center through hole, cylinder pillow block with pillow block round key, the external diameter of the cylinder shaft shoulder and plastic parts base apertures closely cooperate mutually, the iron core that is wound with secondary current coil is inserted in working of plastics shell and is set on the cylinder with pillow block round key, insert from the cylinder pillow block with pillow block round key one end of U-shaped primary current line, through through hole wherein and pass from cylinder one side, draw at the two ends of U-shaped primary current line, the middle part of U-shaped primary current line is placed in band pillow block round key through hole.
In above-mentioned arbitrary technical scheme preferably, the described cylinder pillow block with pillow block round key inserts in working of plastics bottom center through hole, cylinder pillow block with pillow block round key, the external diameter of the cylinder shaft shoulder and plastic parts base apertures closely cooperate mutually, the iron core that is wound with secondary current coil is inserted in working of plastics shell and is set on the cylinder with pillow block round key, insert from the cylinder pillow block with pillow block round key one end of U-shaped primary current line, through through hole wherein and pass from cylinder one side, draw at the two ends of U-shaped primary current line, the middle part of U-shaped primary current line is placed in band pillow block round key through hole.
Micro mutual inductor of the present utility model, adopted the compressing element as the firm primary current line of support with pillow block round key of rubber or silicon rubber, band pillow block round key has soft and elasticity, can make primary current line be easy to pack into and primary current line and band pillow block round key are closely cooperated mutually.This micro mutual inductor also has working of plastics, heat-shrink tube, is wound with the iron core of secondary current coil, the iron core that is wound with secondary current coil is that axle center hollow circuit cylinder body structure, cross section are circular, with pillow block round key and working of plastics, heat-shrink tube, primary current line, be wound with the iron core assembly of secondary current coil.Band pillow block round key is top cylinder pillow block from top to bottom, the middle part cylinder shaft shoulder, lower cylindrical body, the integrative-structure of middle through hole inside, wherein through hole is internal splined hole, internal spline can be designed as vertical tooth or U-shaped tooth, adopt the band pillow block round key of this spline structure, especially when primary current line is while being U-shaped, when the bottom of U-shaped bending is interted by the band pillow block round key of elastomeric material, can easily pass through, can form well extruding again, the U-shaped primary current line of firm support, then, U-shaped primary current line, after band pillow block round key and working of plastics assembling, mutually closely cooperate, when infusion epoxy resin encapsulation instrument transformer, epoxy resin is also not easy to flow out, avoided the instrument transformer encapsulation capacitance problem therefore causing.
Micro mutual inductor of the present utility model, adopt rubber or the compressing band pillow block round key of silicon rubber to support firm primary current line, with pillow block round key and working of plastics, primary current line, be wound with secondary current coil iron core assembly and closely cooperate mutually, compared with prior art, this micro mutual inductor of the present utility model has the advantages such as simple in structure, simplified manufacturing process, encapsulation manufacturing speed are fast, stable insulation, reliable in quality.
Accompanying drawing explanation
Fig. 1 is the band pillow block round key front view according to a preferred embodiment of micro mutual inductor of the present utility model;
Fig. 2-3 are according to the band pillow block round key perspective view with vertical tooth internal spline structure of a preferred embodiment of micro mutual inductor of the present utility model;
Fig. 4-5 are according to the band pillow block round key perspective view with U-shaped tooth internal spline structure of a preferred embodiment of micro mutual inductor of the present utility model;
Fig. 6-7 are according to the plastic piece structure schematic diagram of a preferred embodiment of micro mutual inductor of the present utility model;
Fig. 8-11 for according to a preferred embodiment of micro mutual inductor of the present utility model with pillow block round key and working of plastics, be extrapolation assembly structure time encapsulation schematic diagram;
Figure 12-15 for according to a preferred embodiment of micro mutual inductor of the present utility model with pillow block round key and working of plastics, be built-in assembly structure time encapsulation schematic diagram;
Reference numeral:
1. be with pillow block round key, 1-1. cylinder pillow block, the 1-2. cylinder shaft shoulder, 1-3. cylinder, 2. working of plastics, 3. secondary current lead-out wire leadout hole, is 4. wound with the iron core of secondary current coil, 5. primary current line, 6. heat-shrink tube, 7. secondary current line is drawn wire, 8. personal pressure-wire, 9. primary current wire bonding position of electric energy meter.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated, below describe only conduct demonstration and explain, the utility model is not done to any pro forma restriction.
As shown in Figures 1 to 5, a kind of band pillow block round key 1, its be top cylinder pillow block 1-1, middle part cylinder shaft shoulder 1-2, lower cylindrical body 1-3, inside in the integrative-structure of through hole, and adopt elastomeric material or silastic material compressing.Middle through hole with pillow block round key 1 is made as internal splined hole structure, and the shape of internal spline can be designed as vertical tooth, also can be designed as U-shaped tooth.
As shown in Figure 6 to 7, a kind of working of plastics 2, it is hull shape, hollow inside, bottom center is established hole, and housing one side is established lead-out wire and is poured out hole 3.Working of plastics 2 adopts any one material in ABS, PVC or PC material also compressing.
What have said structure is assembled into micro mutual inductor with pillow block round key 1 and working of plastics 2, heat-shrink tube 6, primary current line 5, the iron core 4 that is wound with secondary current coil, micro mutual inductor is connected with electronic electric energy meter, for sampling, metering, the measurement that electrical quantity is isolated.
Wherein, the iron core 4 that is wound with secondary current coil is axle center hollow circular cylinder 1-3 structure, and its cross section is circular.Primary current line 5 is U-shaped.
With pillow block round key 1 and working of plastics 2, heat-shrink tube 6, primary current line 5, the iron core 4 that is wound with secondary current coil, assemble.
As shown in Fig. 8 to 11, with the cylinder 1-3 of pillow block round key 1 from working of plastics 2 bottom center through holes, insert and with working of plastics 2 close fit; Band pillow block round key 1 is extrapolation assembling with working of plastics 2, with the cylinder pillow block 1-1 of pillow block round key 1,, external diameter and the plastic parts base apertures of cylinder shaft shoulder 1-2 closely cooperate mutually, the iron core 4 that is wound with secondary current coil is inserted in working of plastics 2 shells and is set on the cylinder 1-3 with pillow block round key 1; With pillow block round key 1, with working of plastics 2 extrapolation assemblings and with the iron core 4 that is wound with secondary current coil, assemble, one end of primary current line 5 from cylinder pillow block 1-1 with pillow block round key 1 insert, through through hole wherein and pass from cylinder 1-3 mono-side, draw at the two ends of primary current line 5, and the middle part of primary current line 5 is placed in band pillow block round key 1 through hole and closely cooperates with it.
As shown in Figure 12 to 15, the described cylinder pillow block 1-1 with pillow block round key 1 insert in working of plastics 2 bottom center through holes and with working of plastics 2 close fit; Band pillow block round key 1 is built-in assembling with working of plastics 2, with the cylinder pillow block 1-1 of pillow block round key 1,, external diameter and the plastic parts base apertures of cylinder shaft shoulder 1-2 closely cooperate mutually, the iron core 4 that is wound with secondary current coil is inserted in working of plastics 2 shells and is set on the cylinder 1-3 with pillow block round key 1; With pillow block round key 1, with the built-in assembling of working of plastics 2 and with the iron core 4 that is wound with secondary current coil, assemble, one end of primary current line 5 from cylinder pillow block 1-1 with pillow block round key 1 insert, through through hole wherein and pass from cylinder 1-3 mono-side, draw at the two ends of primary current line 5, and the middle part of primary current line 5 is placed in band pillow block round key 1 through hole and closely cooperates with it.
In force, adopt above-mentioned component packages to manufacture micro mutual inductor, comprise the steps: the first step, make respectively with pillow block round key 1, working of plastics 2, be wound with the iron core 4 of secondary current coil; Second step, successively by with pillow block round key 1, plastic housing, be wound with iron core 4 assembling of secondary current coil; The 3rd step, inserts band pillow block round key 1 by one end of U-shaped primary current line 5 and from wherein passing through hole, the two ends of U-shaped primary current line 5 are exposed, and its U-shaped bottom is placed in the through hole of pillow block round key 1 and with band pillow block round key 1 and closely cooperates; The 4th step, secondary current line is poured out to hole 3 from working of plastics 2 lead-out wires and draws and form secondary current line and draw wire 7, and one end of the personal pressure-wire 8 of electric energy meter is welded on the primary current wire bonding position 9 of U-shaped primary current line 5 and fit on heat-shrink tube 6 with protection pressure-wire; Finally, in working of plastics 2 hollow housings, pour into epoxy resin, after having encapsulated.
Wherein, cylinder 1-3 with pillow block round key 1 inserts from working of plastics 2 bottom center through holes, cylinder pillow block 1-1 with pillow block round key 1, external diameter and the plastic parts base apertures of cylinder shaft shoulder 1-2 closely cooperate mutually, the iron core 4 that is wound with secondary current coil is inserted in working of plastics 2 shells and is set on the cylinder 1-3 with pillow block round key 1, insert from the cylinder pillow block 1-1 with pillow block round key 1 one end of U-shaped primary current line 5, through through hole wherein and pass from cylinder 1-3 mono-side, draw at the two ends of U-shaped primary current line 5, the middle part of U-shaped primary current line 5 is placed in band pillow block round key 1 through hole.
Or, cylinder pillow block 1-1 with pillow block round key 1 inserts in working of plastics 2 bottom center through holes, cylinder pillow block 1-1 with pillow block round key 1, external diameter and the plastic parts base apertures of cylinder shaft shoulder 1-2 closely cooperate mutually, the iron core 4 that is wound with secondary current coil is inserted in working of plastics 2 shells and is set on the cylinder 1-3 with pillow block round key 1, insert from the cylinder pillow block 1-1 with pillow block round key 1 one end of U-shaped primary current line 5, through through hole wherein and pass from cylinder 1-3 mono-side, draw at the two ends of U-shaped primary current line 5, the middle part of U-shaped primary current line 5 is placed in band pillow block round key 1 through hole.
The above is only that preferred implementation of the present utility model is described; not that scope of the present utility model is limited; do not departing under the prerequisite of the utility model design spirit; various distortion and improvement that the common engineers and technicians in this area make the technical solution of the utility model, all should fall in the definite protection range of claims of the present utility model.
Claims (13)
1. a micro mutual inductor, comprise working of plastics, heat-shrink tube, primary current line and be wound with the iron core of secondary current coil, the described iron core that is wound with secondary current coil is axle center hollow circuit cylinder body structure, its cross section is circular, it is characterized in that: also comprise a band pillow block round key, described with pillow block round key and working of plastics, heat-shrink tube, primary current line, be wound with the iron core assembly of secondary current coil.
2. micro mutual inductor as claimed in claim 1, is characterized in that: described with pillow block round key be top cylinder pillow block, the middle part cylinder shaft shoulder, lower cylindrical body, inside in the integrative-structure of through hole, and adopt elastomeric material or silastic material compressing.
3. micro mutual inductor as claimed in claim 1 or 2, is characterized in that: the described middle through hole with pillow block round key is made as internal splined hole structure.
4. micro mutual inductor as claimed in claim 3, is characterized in that: described internal spline be shaped as vertical tooth or U-shaped tooth.
5. micro mutual inductor as claimed in claim 1, is characterized in that: described working of plastics is hull shape, hollow inside, and bottom center is established hole, and housing one side is established secondary current lead-out wire leadout hole.
6. the micro mutual inductor as described in claim 1 or 5, is characterized in that: described working of plastics adopts any one material in ABS, PVC or PC material also compressing.
7. micro mutual inductor as claimed in claim 2, is characterized in that: the described cylinder with pillow block round key from working of plastics bottom center through hole, insert and with working of plastics close fit.
8. micro mutual inductor as claimed in claim 2, is characterized in that: the described cylinder pillow block with pillow block round key insert in working of plastics bottom center through hole and with working of plastics close fit.
9. the micro mutual inductor as described in claim 2 or 7, it is characterized in that: described band pillow block round key and working of plastics are extrapolation assembling, with the cylinder pillow block of pillow block round key,, the external diameter of the cylinder shaft shoulder and plastic parts base apertures closely cooperate mutually, the iron core that is wound with secondary current coil is inserted in working of plastics shell and is set on the cylinder with pillow block round key.
10. the micro mutual inductor as described in claim 2 or 8, it is characterized in that: described band pillow block round key and working of plastics are built-in assembling, with the cylinder pillow block of pillow block round key,, the external diameter of the cylinder shaft shoulder and plastic parts base apertures closely cooperate mutually, the iron core that is wound with secondary current coil is inserted in working of plastics shell and is set on the cylinder with pillow block round key.
11. micro mutual inductors as claimed in claim 9, it is characterized in that: described with the assembling of pillow block round key and working of plastics extrapolation and with the iron core assembling that is wound with secondary current coil, one end of primary current line from cylinder pillow block with pillow block round key insert, through through hole wherein and pass from cylinder one side, draw at the two ends of primary current line, and the middle part of primary current line is placed in band pillow block round key through hole and closely cooperates with it.
12. micro mutual inductors as claimed in claim 10, it is characterized in that: described with pillow block round key and the built-in assembling of working of plastics and with the iron core assembling that is wound with secondary current coil, one end of primary current line from cylinder pillow block with pillow block round key insert, through through hole wherein and pass from cylinder one side, draw at the two ends of primary current line, and the middle part of primary current line is placed in band pillow block round key through hole and closely cooperates with it.
13. micro mutual inductors as claimed in claim 1, is characterized in that: described primary current line is U-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420217902.6U CN203858970U (en) | 2014-04-30 | 2014-04-30 | Miniature mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420217902.6U CN203858970U (en) | 2014-04-30 | 2014-04-30 | Miniature mutual inductor |
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| Publication Number | Publication Date |
|---|---|
| CN203858970U true CN203858970U (en) | 2014-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420217902.6U Expired - Fee Related CN203858970U (en) | 2014-04-30 | 2014-04-30 | Miniature mutual inductor |
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| Country | Link |
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| CN (1) | CN203858970U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105023740A (en) * | 2014-04-30 | 2015-11-04 | 桐乡市伟达电子有限公司 | Micro mutual inductor and packaging manufacturing method thereof |
-
2014
- 2014-04-30 CN CN201420217902.6U patent/CN203858970U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105023740A (en) * | 2014-04-30 | 2015-11-04 | 桐乡市伟达电子有限公司 | Micro mutual inductor and packaging manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141001 Termination date: 20180430 |