阅读说明：本技术 组合式电感器及其安装方法 (Combined inductor and mounting method thereof ) 是由 冯颖盈 姚顺 林泽锋 郭珏 张昌盛 于 2021-07-23 设计创作，主要内容包括：本发明公开了组合式电感器及其安装方法,组合式电感器包括：线圈；骨架组件,其由第一骨架和第二骨架构成,线圈夹持在第一骨架和第二骨架之间,第一骨架设有点胶通孔,点胶通孔填充有与线圈接触的导热胶；磁芯组件,其由第一磁芯和具有磁柱的第二磁芯构成,骨架组件夹持在第一磁芯和第二磁芯之间,第一磁芯卡接在第一骨架上,且第一磁芯与导热胶接触,第二磁芯套装在第二骨架上,磁柱穿过第二骨架伸入线圈的中心孔中。本发明通过简易的结构设计降低电感器的装配难度,有效降低生产成本并提高生产效率。(The invention discloses a combined inductor and a mounting method thereof, wherein the combined inductor comprises: a coil; the coil is clamped between the first framework and the second framework, the first framework is provided with a dispensing through hole, and the dispensing through hole is filled with heat-conducting glue which is in contact with the coil; the magnetic core subassembly, it comprises first magnetic core and the second magnetic core that has the magnetism post, and skeleton subassembly centre gripping is between first magnetic core and second magnetic core, and first magnetic core joint is on first skeleton, and first magnetic core and the contact of heat-conducting glue, and second magnetic core suit is on the second skeleton, and the magnetism post passes in the centre bore that the second skeleton stretched into the coil. The invention reduces the assembly difficulty of the inductor through a simple structural design, effectively reduces the production cost and improves the production efficiency.)

1. A combined inductor, comprising:

a coil;

the coil is clamped between the first framework and the second framework, the first framework is provided with a dispensing through hole, and the dispensing through hole is filled with heat-conducting glue which is in contact with the coil;

the magnetic core subassembly, it comprises first magnetic core and the second magnetic core that has the magnetism post, skeleton subassembly centre gripping is in first magnetic core with between the second magnetic core, first magnetic core joint is in on the first skeleton, just first magnetic core with the heat-conducting glue contact, second magnetic core suit is in on the second skeleton, the magnetism post passes the second skeleton stretches into in the centre bore of coil.

2. The combined inductor according to claim 1, wherein the inner side surface of the first bobbin is opposite to the coil, the outer side surface of the first bobbin is opposite to the first magnetic core, the outer side surface of the first bobbin is provided with at least two buckles extending towards the first magnetic core, and the buckles are buckled and pressed on the edge of the first magnetic core, so that the first magnetic core is attached to the outer side surface of the first bobbin.

3. The inductor as claimed in claim 2, wherein the second core further has a pair of supporting bases extending toward the first core, the magnetic pillar is located between the pair of supporting bases, the inner side surface of the first bobbin is provided with protrusions disposed along corners of the supporting bases, and the supporting bases are inserted into a limiting region surrounded by the protrusions.

4. The combined inductor according to claim 1, wherein an inner side surface of the second bobbin is opposite to the coil, an outer side surface of the second bobbin is opposite to the second magnetic core, and a positioning groove is formed in the outer side surface of the second bobbin and faces the second magnetic core, and the positioning groove is sleeved on the second magnetic core.

5. The combined inductor as claimed in claim 4, wherein the inner side of the second bobbin has a plurality of ribs disposed around a central axis thereof, the ribs abutting against the end surfaces of the coil.

6. The combined inductor according to claim 1, wherein the coil is formed by bending and coiling a copper bar, both ends of the coil are provided with extending portions extending out of the frame assembly, and the first frame is provided with a notch allowing the extending portions to pass through.

7. The combined inductor of claim 1, wherein the first core has a larger profile dimension than the second core.

8. The combined inductor as claimed in any one of claims 1 to 7, wherein the outer side of the first frame is further provided with at least two positioning posts located outside the first magnetic core, and the positioning posts are used for being inserted into positioning holes of the housing.

9. The combined inductor of claim 8, wherein the second core and the second bobbin are pressed against the housing by a spring, one end of the spring being fixed to the housing.

10. A method of mounting a combined inductor using a combined inductor according to any one of claims 1 to 9, the method comprising the steps of:

clamping the first magnetic core on the outer side surface of the first framework, and inserting the positioning column of the first framework into the positioning hole of the machine shell;

filling heat-conducting glue in the glue dispensing through hole of the first framework, and installing the coil on the inner side surface of the first framework;

sleeving the second framework and the second magnetic core, and inserting a magnetic column of the second magnetic core into the coil;

and fixedly connecting the extension part of the coil with an external conductive piece, and pressing the second magnetic core and the second framework towards the shell by using an installation elastic sheet to finish the assembly of the combined inductor on the shell.

Technical Field

The invention relates to the technical field of inductors, in particular to a combined inductor and an installation method thereof.

Background

With the rapid development of the new energy automobile industry in China, various new technologies are continuously updated and applied in the whole industry, and an inductor is also continuously changed and improved as an essential component in the new energy automobile industry. At present, the main body composition of the inductor is composed of a coil framework, a coil, an E-shaped magnetic core, an epoxy board and 5 parts of epoxy resin glue, the inductor is fixed on the epoxy board, the coil is connected on the epoxy board to form a pin, and finally the pin is connected with a PCBA board in a welding mode.

From the mounting mode, coil skeleton, coil and magnetic core etc. assemble through sticky tape wound form or glue adhesion formula, need twine inductance magnetic core together with the sticky tape on the preparation technology of sticky tape wound form inductor, and the preparation technology of glue adhesion formula inductor needs to glue between the magnetic core, and uses the frock to compress tightly the laminating, and solidification etc. stews. From the heat dissipation mode, adopt the mode of embedment AB glue to conduct away the heat that inductance coils produced. The existing inductor has complex assembly process, long processing period and difficult guarantee of finished product quality.

Therefore, how to design a combined inductor that is easy to assemble and improves the production efficiency is an urgent technical problem to be solved in the industry.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides the combined inductor and the installation method thereof.

The technical scheme adopted by the invention is that a combined inductor is designed, which comprises the following components: a coil; the coil is clamped between the first framework and the second framework, the first framework is provided with a dispensing through hole, and the dispensing through hole is filled with heat-conducting glue which is in contact with the coil; the magnetic core subassembly, it comprises first magnetic core and the second magnetic core that has the magnetism post, and skeleton subassembly centre gripping is between first magnetic core and second magnetic core, and first magnetic core joint is on first skeleton, and first magnetic core and the contact of heat-conducting glue, and second magnetic core suit is on the second skeleton, and the magnetism post passes in the centre bore that the second skeleton stretched into the coil. The combined inductor comprises the coil, the framework assembly and the magnetic core assembly, an epoxy plate is omitted compared with the traditional inductor, adhesive tape winding or epoxy resin adhesion is not needed, and the combined inductor does not need a heat dissipation scheme of potting adhesive and baking curing, but heat conduction adhesive is added between the coil and the first magnetic core, so that a heat source of the coil is conducted to the first magnetic core through the heat conduction adhesive, and the first magnetic core is conducted to a directly contacted shell for heat dissipation.

Preferably, the medial surface of first skeleton is relative with the coil, and the lateral surface of first skeleton is relative with first magnetic core, and the lateral surface of first skeleton is equipped with two at least buckles that stretch out towards first magnetic core, and the buckle withholds the edge at first magnetic core to make the lateral surface of the first skeleton of first magnetic core laminating, first skeleton and first magnetic core adopt the mode of buckle joint to be fixed.

Preferably, the second magnetic core still has a pair of supporting seat that stretches out towards first magnetic core, and the magnetism post is located in the middle of this pair of supporting seat, and the medial surface of first skeleton is equipped with the bulge that sets up along the supporting seat corner, and in the supporting seat inserted the spacing region that the bulge encloses, the supporting seat of second magnetic core and first skeleton were assembled the location through the mode of pegging graft.

Preferably, the medial surface of second skeleton is relative with the coil, and the lateral surface of second skeleton is relative with the second magnetic core, and the lateral surface of second skeleton is equipped with the constant head tank that sets up towards the second magnetic core, and the constant head tank cover is on the second magnetic core, and the main part of second magnetic core and second skeleton pass through the mode equipment location of suit.

Preferably, the inner side surface of the second framework is provided with a plurality of protruding strips distributed around the central axis of the second framework, the protruding strips abut against the end surface of the coil, and the coil is pressed on the first framework through the protruding strips.

Preferably, the coil adopts the copper bar to bend and coil and forms, and is more simple and convenient than traditional multiturn wire winding mode, and is more firm in the use of heavy current switch-on. The both ends of coil all are equipped with the extension that stretches out the skeleton subassembly, and first skeleton is equipped with the breach that allows the extension to pass.

Preferably, the contour dimension of the first magnetic core is larger than that of the second magnetic core, so that the inductance caused by the assembly error of the dislocation of the two magnetic cores in the assembly process can be avoided, the air gap size of the inductor directly influences the filtering function, and the filtering function is more stable and reliable due to the fact that the single part of the second magnetic core is used for control and guarantee.

Preferably, the outer side surface of the first framework is further provided with at least two positioning columns located outside the first magnetic core, and the positioning columns are used for being inserted into positioning holes of the machine shell. The first framework integrates the shell positioning, the first magnetic core positioning, the coil positioning and other structures, and the combined inductor is ensured to be assembled simply, conveniently and quickly.

Preferably, the second magnetic core and the second framework are pressed towards the shell by the elastic sheet, one end of the elastic sheet is fixed on the shell, and the elastic sheet is not welded and fixed on the PCB in a welding mode.

The invention also provides an installation method of the combined inductor, which comprises the following steps:

clamping the first magnetic core on the outer side surface of the first framework, and inserting the positioning column of the first framework into the positioning hole of the machine shell;

filling heat-conducting glue in the glue dispensing through hole of the first framework, and installing the coil on the inner side surface of the first framework;

sleeving a second framework and a second magnetic core, and inserting a magnetic column of the second magnetic core into the coil;

and fixedly connecting the extension part of the coil with the external conductive part, and pressing the second framework and the second magnetic core towards the shell by the mounting elastic sheet to complete the assembly of the combined inductor on the shell.

Compared with the prior art, the coil, the framework assembly and the magnetic core assembly are adopted, the three parts are assembled and positioned in a clamping or inserting mode, heat is transferred between the coil and the first magnetic core by utilizing the heat-conducting glue, the processes of glue pouring, curing, welding and the like are omitted in the process, the assembly is simple and efficient, and the production cost is low.

Drawings

The invention is described in detail below with reference to examples and figures, in which:

fig. 1 is an assembled view of the combined inductor of the present invention;

FIG. 2 is a perspective view of a first armature of the present invention;

FIG. 3 is a bottom view of the first core of the present invention;

FIG. 4 is a front view of a first magnetic core of the present invention;

FIG. 5 is a perspective view of a second armature of the present invention;

FIG. 6 is a bottom view of a second core of the present invention;

FIG. 7 is a front view of a second core of the present invention;

fig. 8 is a perspective view of a coil in the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Thus, a feature indicated in this specification will serve to explain one of the features of one embodiment of the invention, and does not imply that every embodiment of the invention must have the stated feature.

The principles of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

As shown in fig. 1, the present invention provides a combined inductor generally installed in a housing, the combined inductor mainly includes a coil 1, a bobbin assembly 2 and a core assembly 3, the bobbin assembly 2 is composed of a first bobbin 21 and a second bobbin 22, the coil 1 is clamped between the first bobbin 21 and the second bobbin 22, a positioning ring is disposed at a center position of the first bobbin 21, the positioning ring extends into a center hole of the coil 1, the core assembly 3 is composed of a first core 31 and a second core 32, and the bobbin assembly 2 is clamped between the first core 31 and the second core 32.

As shown in fig. 2 to 4, the first magnetic core 31 is clamped on the first framework 21, the first framework 21 is provided with a dispensing through hole 211, the dispensing through hole 211 is filled with a heat conducting glue, an inner side surface of the first framework 21 is opposite to the coil 1, an outer side surface of the first framework 21 is opposite to the first magnetic core 31, and the heat conducting glue is in contact with the coil 1 inside the first framework 21 and the first magnetic core 31 outside the first framework 21, so that a heat source of the coil 1 is conducted to the first magnetic core 31 through the heat conducting glue, and the first magnetic core 31 is conducted to a directly contacted enclosure for heat dissipation.

Specifically, the first bobbin 21 and the first magnetic core 31 are clamped together, the first magnetic core 31 is flat, at least two buckles 212 extending towards the first magnetic core 31 are arranged on the outer side surface of the first bobbin 21, the middle portion of the first magnetic core 31 is located between the buckles 212 of the first bobbin 21, a buckle tongue is arranged at the tail end of each buckle 212, the buckle tongue is buckled and pressed on the edge of the first magnetic core 31, the distance between the buckle tongue and the outer side surface of the first bobbin 21 just accommodates the thickness of the first magnetic core 31, the first magnetic core 31 is pressed on the first bobbin 21 through the buckles 212, and the first magnetic core 31 is attached to the outer side surface of the first bobbin 21. During assembly, the edge of the first magnetic core 31 is aligned with the fasteners 212 arranged on the first magnetic core 31, the first magnetic core 31 is pressed towards the outer side surface of the first framework 21, the first magnetic core 31 pushes the fasteners 212 away to enable the fasteners to deform until the first magnetic core 31 is attached to the outer side surface of the first framework 21, at the moment, the fasteners 212 recover to a natural state, and the fastening tongues are fastened and pressed on the edge of the first magnetic core 31 to complete the fastening of the first magnetic core 31 and the first framework 21.

As shown in fig. 5 to 7, the second magnetic core 32 includes a second magnetic core body 321, a pillar 322, and a pair of supporting bases 323, wherein two opposite sides of the first magnetic core body 321 are respectively provided with one supporting base 323, the pillar 322 is located in the middle of the pair of supporting bases 323, and the middle of the second magnetic core body 321 is smaller than the two sides of the pair of supporting bases 323. The second magnetic core body 321 is sleeved on the second framework 22, the magnetic pillar 322 passes through the second framework 22 and extends into the central hole of the coil 1, and the pair of supporting seats 322 is located outside the coil 1. The medial surface of second skeleton 22 is relative with coil 1, and the lateral surface of second skeleton 22 is relative with second magnetic core 32, and the lateral surface of second skeleton 22 is equipped with the location chimb 221 that stretches out towards second magnetic core 32, and this location chimb 221 encloses into the constant head tank at the lateral surface of second skeleton 22, and the constant head tank cover is on the middle part of second magnetic core body 321 to realize the suit location of second magnetic core main part 321 and second skeleton 22.

Further, as shown in fig. 1 and 2, the inner side surface of the first frame 21 is provided with a protruding portion 213 disposed along a corner of the supporting seat 323, the protruding portion 213 encloses a limiting region at the edge of the first frame 21, and the supporting seat 323 is inserted into the limiting region enclosed by the protruding portion 213, so as to realize the assembling and positioning of the supporting seat 323 of the second magnetic core 32 and the first frame 21. The inner side surface of the second framework 22 is provided with a plurality of protruding strips distributed around the central axis of the second framework, after the second magnetic core 31 is assembled with the first framework 21, the protruding strips are abutted against the end surface of the coil 1, the coil 1 is pressed on the first framework 21, and the coil 1 is prevented from moving axially in the framework assembly 2. It should be noted that the pair of supporting bases 323 has a total of four corners, and at least two corners located at opposite angles are inserted into the limiting area surrounded by the protruding portion 213, i.e., at least two corners located at opposite angles are positioned. The shape of the first magnetic core 31 is basically the same as that of the second magnetic core body 321, but the outline dimension of the first magnetic core 31 is larger than that of the second magnetic core body 321, so that the inductance caused by the assembly error of the dislocation of the two magnetic cores in the assembly process can be avoided, and the air gap size of the inductor directly influences the filtering function.

Still further, as shown in fig. 1 and 8, the coil 1 is formed by bending and coiling a copper bar, is simpler and more convenient than a traditional multi-turn winding mode, and is more firm in large-current conduction use. Both ends of coil 1 all are equipped with extension 11 that stretches out skeleton subassembly 2, and the end of extension 11 is equipped with mounting hole 12, and the screw passes mounting hole 12 with extension 11 and outside electrically conductive piece fixed connection, and coil 1 is connected with the PCB electricity through this outside electrically conductive piece. The first frame 21 is provided with a notch for allowing the extension portion 11 to pass through, and the coil 1 is prevented from rotating in the circumferential direction in the frame assembly 2 by the design of matching the notch with the extension portion 11.

As shown in fig. 1 and 2, at least two positioning posts 214 located outside the first magnetic core 31 are further disposed on the outer side surface of the first framework 21, the positioning posts 214 are used for being inserted into the positioning holes of the chassis, and the first framework 214 integrates the chassis positioning, the first magnetic core positioning, the coil positioning, and other structures together, so that the assembling process of the combined inductor is simple and fast. In order to more reliably mount the combined inductor and ensure a more stable structure of the combined inductor, the second magnetic core 32 and the second bobbin 22 are pressed against the chassis by the elastic piece, one end of the elastic piece is fixed on the chassis, the other end of the elastic piece is provided with a main leg and an auxiliary leg, the main leg is pressed against the second magnetic core body 321, and the auxiliary leg is pressed against the position of the second bobbin 22 exposed outside the second magnetic core body 321.

As shown in fig. 1, the present invention further provides a method for installing the above combined inductor, including the following steps:

clamping the first magnetic core 31 on the outer side surface of the first framework 21, and inserting the positioning column 214 of the first framework 21 into the positioning hole of the machine shell to prevent the position deviation of the first framework 21;

filling heat-conducting glue in the glue dispensing through hole 211 of the first framework 21, installing the coil 1 on the inner side surface of the first framework 21, and enabling the coil 1 to be in contact with the heat-conducting glue;

sleeving the second framework 22 and the second magnetic core 32, and inserting the magnetic pillar 322 of the second magnetic core 32 into the coil 1;

and fixedly connecting the extension part 11 of the coil 1 with an external conductive piece by using a screw, and pressing the second framework 21 and the second magnetic core 32 towards the shell by using an installation elastic sheet to complete the assembly of the combined inductor on the shell.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.