CN222440332U - Combined transformer - Google Patents

Abstract

The present disclosure relates to a combined mutual inductor, which comprises a shell, an insulating cover, a first coil, a second coil, a conductor and an insulating member. The shell comprises a first shell and a second shell stacked on the first shell, and the first shell is provided with two first jacks and two second jacks. The insulating cover is arranged in the first shell. The first coil is arranged in the insulating cover. The second coil is arranged in the second shell. The conductor is in a U-shaped bending structure, and the conductor comprises a first conductor and a second conductor. The two pins of the first conductor are inserted in the first jack and are respectively arranged on the inner side and the outer side of the first coil. The two pins of the second conductor are inserted in the second jack and are respectively arranged on the inner side and the outer side of the first coil and the second coil. The transition sections of the first conductor and the second conductor are both arranged in the second shell. The insulating member is arranged in the second shell, and the first insulating part of the insulating member is arranged between the first conductor and the second coil, and the second insulating part of the insulating member is arranged between the second conductor and the second coil.

Description

Combined mutual inductor

Technical Field

The disclosure relates to the technical field of transformers, in particular to a combined transformer.

Background

The transformer is a device capable of proportionally converting a voltage or a current, and proportionally converting an input high voltage into a low voltage or proportionally converting a large current into a small current and outputting the small current, thereby realizing measurement of the high voltage or the large current. When large current measurement is performed, whether leakage current exists or not is also detected, so that a transformer integrating a current transformer and a leakage current transformer into a whole appears on the market.

One chinese patent of the utility model, publication No. CN211788602U, discloses a multifunctional transformer that superimposes and fixes a current transformer and a leakage current transformer together, and saves the occupied space while performing its own functions, thereby realizing optimization of products.

However, the first U-shaped conductor is fixed on the current transformer shell in a plugging manner, a part between two bends of the first U-shaped conductor is exposed outside the current transformer shell, leakage is easy to generate, the safety of the multifunctional combined transformer is poor, and the part exposed outside the current transformer shell is easy to be interfered by an external magnetic field to influence the electromagnetic induction process inside the current transformer, so that the measurement accuracy is influenced. On the other hand, after packing into the mutual-inductor casing with the mutual-inductor line, need carry out insulating seal to the mutual-inductor line package through filling epoxy, epoxy forms a whole with mutual-inductor line package and mutual-inductor casing bonding, in case one of mutual-inductor casing or mutual-inductor line package that combines takes place to damage, then need change whole, has increased maintenance cost.

Disclosure of utility model

An object of the present disclosure is to provide a combined transformer to solve the above technical problems.

In order to solve the technical problems, the following technical scheme is adopted in the present disclosure.

The disclosure provides a combined transformer, which comprises a shell, a first transformer and a second transformer, wherein the shell comprises a first shell and a second shell which is overlapped above the first shell, the bottom of the first shell is provided with an opening, and the first shell is provided with two first jacks and two second jacks; the insulating cover is arranged in the first shell; the insulation device comprises a first shell, a second shell, a first coil, a second coil, a conductor, an insulation piece, a first insulation part, a second insulation part and a first insulation part, wherein the first coil is arranged in the insulation shell, the second coil is arranged in the second shell, the conductor is of a U-shaped bent structure, so that the conductor is provided with two pins and a transition section connected between the two pins, the conductor comprises a first conductor and a second conductor, one pin of the first conductor is inserted in one first jack and is arranged in the second shell, the other pin of the first conductor is inserted in the other second jack and is arranged on the outer side of the first coil, the other pin of the first conductor is inserted in the other first jack and is arranged on the inner side of the first coil, the other pin of the other first conductor is inserted in the other first jack and the transition section of the second conductor is arranged in the second shell, the other pin of the other first conductor is inserted in the other first jack and is arranged on the outer side of the second coil, the other pin of the other pin is inserted in the other first jack and is arranged on the outer side of the second coil, the other pin is arranged on the other first jack, one pin is inserted in the other first jack, the other pin of the pin is arranged on the other first jack, one pin is arranged on the transition section of the first conductor, and one of the other pin is arranged between the first conductor, and one pin is arranged on the first conductor, and one side, one pin is arranged between the other pin is arranged, and one pin is arranged between the two pin and one, and one pin is.

According to some embodiments of the application, the second insulating part is in a U-shaped bending structure, so that the second insulating part is provided with two first insulating strips and a second insulating strip connected between the two first insulating strips, the two first insulating strips are respectively arranged between the two pins of the second conductor and the second coil, the second insulating strip is arranged between the transition section of the second conductor and the second coil, the first insulating strip is perpendicular to the first insulating part, and the second insulating strip is parallel to the first insulating part.

According to some embodiments of the application, the insulating piece further comprises a third insulating part, the third insulating part is erected on the first insulating part, one of the first insulating strips is connected with the third insulating part, and the third insulating part extends from one end, close to the first insulating strip, of the first insulating part to one end, far away from the first insulating strip, of the first insulating part.

According to some embodiments of the application, the width of the first insulating part gradually increases from one end close to the first insulating strip to one end far away from the first insulating strip, and the transition section of the first conductor is arranged at one end of the first insulating part far away from the first insulating strip.

According to some embodiments of the application, the second shell comprises a second outer shell, a second inner shell and a second connecting sheet for connecting the second outer shell and the second inner shell, the second outer shell and the second inner shell are annular, the second outer shell is arranged outside the second inner shell in a surrounding mode, a second accommodating groove is formed by surrounding the inner wall of the second outer shell, the outer wall of the second inner shell and the inner wall of the second connecting sheet, and the second coil and the insulating piece are arranged in the second accommodating groove.

According to some embodiments of the application, a first positioning groove is concavely formed in the inner wall of the second outer shell, a second positioning groove is concavely formed in the outer wall of the second inner shell, a third positioning groove is concavely formed in the inner wall of the second connecting piece, two pins of the second conductor are respectively arranged in the first positioning groove and the second positioning groove, and a transition section of the second conductor is arranged in the third positioning groove.

Some embodiments of the application, the first housing comprises

A first outer shell, a first inner shell, and a first connection piece connecting between the first outer shell and the first inner shell; the first outer shell and the first inner shell are annular, the first outer shell is arranged outside the first inner shell in a surrounding mode, a first containing groove is formed by surrounding the inner wall of the first outer shell, the outer wall of the first inner shell and the inner wall of the first connecting piece, the first coil and the insulating cover are arranged in the first containing groove, the two first jacks are respectively arranged outside the first outer shell and inside the first inner shell, the two second jacks are respectively arranged outside the first outer shell and inside the first inner shell, a first jack groove is formed in the outer wall of the first connecting piece, and the first jack groove is communicated with the two first jacks.

Some embodiments of the application further comprise a pin group, wherein the pin group comprises a first pin group and a second pin group, the first pin group is arranged on the first shell and connected with the first coil, and the second pin group is arranged on the second shell and connected with the second coil.

According to some embodiments of the application, the first pin group comprises a first pin seat and two first pins, the second pin group comprises a second pin seat and two second pins, a first pin groove is formed in the first shell, a second pin groove is formed in the second shell, the first pin seat is arranged in the first pin groove, the two first pins are connected with the first coil, the second pin seat is arranged in the second pin groove, and the two second pins are connected with the second coil.

According to some embodiments of the application, the first pin groups are provided with a plurality of groups, the first pin grooves are provided with a plurality of groups at intervals, and the plurality of groups of the first pin groups are respectively arranged in the plurality of first pin grooves.

According to the technical scheme, the embodiment of the disclosure has at least the following advantages and positive effects:

In the combined transformer, an insulating cover with a first coil is arranged in a first shell, two pins of the first conductor are inserted into two first jacks, a transition section of the first conductor is positioned at the top of the first shell and exposed out of the first shell, an insulating piece and a second coil are combined and placed at the top of the first shell, the positions of the first insulating part and the transition section of the first conductor are opposite, two pins of the second conductor are inserted into two second jacks to be matched with the insulating piece, the second insulating part can form effective blocking between the second conductor and the second coil, and finally the second shell is overlapped on the first shell. Because the changeover portion of first conductor and second conductor all is located the second casing, can effectively avoid because the changeover portion of conductor exposes the electric leakage phenomenon that leads to outward, improved the security of transformer, and can reduce the interference of external magnetic field, promote measurement accuracy. On the other hand, the insulating cover is used for shielding electromagnetic interference of the external environment to the first coil, the first insulating part of the insulating piece is used for isolating the second conductor and the second coil, and current between the second conductor and the second coil is prevented from directly flowing, so that potential electrical hazards can be reduced, the second insulating part is used for isolating the first conductor and the second coil, and signal crosstalk between adjacent modules is avoided. Through the setting of insulating boot and insulating part, on the basis of guaranteeing the insulating properties of combination formula mutual-inductor, because casing and coil need not glue into a whole, when one of them damage in casing or the coil, can change alone, reduced maintenance cost.

Drawings

Various objects, features and advantages of the present disclosure will become more apparent from the following detailed description of the preferred embodiments of the disclosure, when taken in conjunction with the accompanying drawings. The drawings are merely exemplary illustrations of the present disclosure and are not necessarily drawn to scale. In the drawings, like reference numerals refer to the same or similar parts throughout.

Wherein:

fig. 1 is a schematic structural diagram of a combined transformer according to an embodiment of the present disclosure.

Fig. 2 is an exploded structural view of fig. 1.

Fig. 3 is a cross-sectional view of a position of fig. 1.

Fig. 4 is a cross-sectional view of another location of fig. 1.

Fig. 5 is a schematic structural view of the second housing in fig. 1.

Fig. 6 is a schematic view of the first housing structure in fig. 1.

Fig. 7 is a schematic view of the structure of fig. 7 from another view angle.

Fig. 8 is a schematic view of the structure of the insulator of fig. 2.

Fig. 9 is a schematic structural view of the first pin group in fig. 1.

Fig. 10 is a schematic diagram of the structure of the second conductor in fig. 2.

The reference numerals are as follows, 1, first housing, 11, first outer housing, 12, first inner housing, 13, first connecting piece, 131, first jack, 132, second jack, 133, first jack slot, 14, first pin slot, 2, second housing, 21, second outer housing, 211, first positioning slot, 22, second inner housing, 221, second positioning slot, 23, second connecting piece, 231, third positioning slot, 24, second pin slot, 3, insulating cover, 4, second coil, 5, first conductor, 6, second conductor, 7, insulator, 71, first insulator, 711, first insulator, 712, second insulator, 72, second insulator, 73, third insulator, 8, first pin set, 81, first pin set, 82, first pin, 9, second pin set.

Detailed Description

While this disclosure may be susceptible to embodiment in different forms, there is shown in the drawings and will herein be described in detail, specific embodiments thereof with the understanding that the present disclosure is to be considered as an exemplification of the principles of the disclosure and is not intended to limit the disclosure to that as illustrated herein.

Thus, rather than implying that each embodiment of the present disclosure must have the illustrated features, one feature noted in this specification will be used to illustrate one of the features of an embodiment of the present disclosure. Furthermore, it should be noted that the present specification describes a number of features. Although certain features may be combined together to illustrate a possible system design, such features may be used in other combinations not explicitly described. Thus, unless otherwise indicated, the illustrated combinations are not intended to be limiting.

In the embodiments shown in the drawings, indications of orientation (such as up, down, left, right, front and rear) are used to explain the structure and movement of the various elements of the disclosure as opposed to absolute. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the description of the position of these elements changes, the indication of these directions changes accordingly.

The coils in the following embodiments each include a toroidal core and a winding wound around the toroidal core, wherein the number of turns of the winding is greater than 2.

Referring to fig. 1 to 10, the combined transformer includes a housing, an insulating cover 3, a first coil (the first coil is not shown in the drawings), a second coil 4, a conductor and an insulating member 7, wherein the housing includes a first housing 1 and a second housing 2 stacked above the first housing 1, a bottom opening of the first housing 1 is provided with two first insertion holes 131 and two second insertion holes 132 on the first housing 1. The insulating cover 3 is provided in the first housing 1. The first coil is arranged in the insulating cover 3. The second coil 4 is provided in the second housing 2. The conductor is U-shaped bending structure, so that the conductor is provided with two pins and a transition section connected between the two pins, the conductor comprises a first conductor 5 and a second conductor 6, one pin of the first conductor 5 is inserted into a first jack 131 and is arranged on the inner side of a first coil, the other pin of the first conductor 5 is inserted into another first jack 131 and is arranged on the outer side of the first coil, one pin of the second conductor 6 is inserted into a second jack 132 and is arranged on the inner side of the first coil and the second coil 4, the other pin of the first conductor 5 is inserted into another second jack 132 and is arranged on the outer side of the first coil and the second coil 4, and the transition section of the first conductor 5 and the transition section of the second conductor 6 are both arranged in the second shell 2. The insulator 7 is disposed in the second housing 2, the insulator 7 includes a first insulator 71 and a second insulator 72 connected to each other, the first insulator 71 is disposed between the first conductor 5 and the second coil 4, and the second insulator 72 is disposed between the second conductor 6 and the second coil 4.

In the combined transformer of the embodiment of the disclosure, the working principle is that according to the electromagnetic induction principle, when the first conductor 5 and the second conductor 6 are electrified with alternating current, induction current signals are generated on the first coil and the second coil 4. The current to be detected is firstly led into one pin of the second conductor 6, the current flowing out of the other pin of the second conductor 6 is led into the first conductor 5, the flowing directions of the current in the first conductor 5 and the second conductor 6 are opposite, the current to be detected can be measured by detecting the current signal flowing out of the second coil 4, whether the current to be detected generates leakage current can be determined by detecting whether the current signal flows out of the first coil, and therefore the detection of large current and leakage current can be completed by using the combined transformer. The combined transformer can also perform direct current leakage detection through alternating signals generated by an external circuit, and further description is omitted here.

The assembly transformer comprises the steps of installing an insulating cover 3 with a first coil inside into a first shell 1, inserting two pins of a first conductor 5 into two first jacks 131, enabling a transition section of the first conductor 5 to be located at the top of the first shell 1 and exposed out of the first shell 1, combining an insulating piece 7 and a second coil 4 and placing the insulating piece on the top of the first shell 1, ensuring that the position of the transition section of the first conductor 5 is opposite to that of the first insulating part 71, inserting two pins of the second conductor 6 into two second jacks 132, matching with the insulating piece 7, ensuring that the second insulating part 72 can form effective blocking between the second conductor 6 and the second coil 4, and finally superposing the second shell 2 on the first shell 1. Because the changeover portion of first conductor 5 and second conductor 6 all is located second casing 2, can effectively avoid because the changeover portion of conductor exposes the electric leakage phenomenon that leads to outward, improved the security of mutual-inductor, and can reduce the interference of external magnetic field, promote measurement accuracy. On the other hand, the insulating cover 3 is used for shielding electromagnetic interference of the external environment to the first coil, the first insulating part 71 of the insulating member 7 is used for isolating the second conductor 6 and the second coil 4, and current between the second conductor 6 and the second coil 4 is prevented from directly flowing, so that potential electrical hazards can be reduced, the second insulating part 72 is used for isolating the first conductor 5 and the second coil 4, and signal crosstalk between adjacent modules is avoided. Through the setting of insulating boot 3 and insulating part 7, on the basis of guaranteeing the insulating properties of combination formula mutual-inductor, because casing and coil need not glue into a whole, when one of them damage in casing or the coil, can change alone, reduced maintenance cost.

In the present embodiment, the first conductor 5 and the second conductor 6 have the same structure, the second pin group 9 and the first pin group 8 have the same structure, and the first coil and the second coil 4 have the same structure.

The second insulating portion 72 has a U-shaped bent structure such that the second insulating portion 72 has two first insulating strips 711 and a second insulating strip 712 connected between the two first insulating strips 711. The two first insulating strips 711 are respectively disposed between the two pins of the second conductor 6 and the second coil 4. A second insulating strip 712 is provided between the transition section of the second conductor 6 and the second coil 4. The first insulating strip 711 is perpendicular to the first insulating portion 71, and the second insulating strip 712 is parallel to the first insulating portion 71. The second insulating portion 72 is adapted to the shape of the second conductor 6, so that the second conductor 6 and the second coil 4 can be effectively isolated, and the first insulating portion 71 and the second insulating portion 72 enclose to form a non-closed frame-shaped structure, so that the overall structure of the insulating member 7 is more stable.

The insulator 7 further includes a third insulating portion 73. The third insulating portion 73 stands on the first insulating portion 71, and one of the first insulating strips 711 is connected to the third insulating portion 73. The third insulating portion 73 extends from an end of the first insulating portion 71 close to the first insulating bar 711 toward an end of the first insulating portion 71 away from the first insulating bar 711. The first insulating portion 71 and the second insulating portion 72 are connected through the third insulating portion 73, on the one hand, the third insulating portion 73 enlarges the connection portion of the first insulating portion 71 and the second insulating portion 72, so that the connection of the first insulating portion 71 and the second insulating portion 72 is more stable, and on the other hand, the first insulating portion 71 can realize shielding between the second housing 2 and the second coil 4, thereby enhancing the effect of shielding the interference of the external environment.

The width of the first insulating portion 71 gradually increases from an end closer to the first insulating strip 711 to an end farther from the first insulating strip 711. The transition section of the first conductor 5 is provided at an end of the first insulating portion 71 remote from the first insulating strip 711. The large width of the first insulating portion 71 is used for shielding the transition section of the first conductor 5, and the arrangement of gradual width change can provide a yielding opening for the installation of the second coil 4, so that the second coil 4 and the insulating member 7 can be conveniently installed together, and unnecessary material loss can be reduced.

Referring to fig. 6, the second housing 2 includes a second outer housing 21, a second inner housing 22, and a second connection piece 23 connecting between the second outer housing 21 and the second inner housing 22. The second outer shell 21 and the second inner shell 22 are both annular, and the second outer shell 21 is annularly arranged outside the second inner shell 22. The inner wall of the second outer housing 21, the outer wall of the second inner housing 22 and the inner wall of the second connecting piece 23 enclose to form a second accommodation groove. The second coil 4 and the insulator 7 are both disposed in the second accommodation groove. The annular second accommodating groove is matched with the shape of the second coil 4, so that the second coil 4 can be conveniently and correctly installed, the second coil 4 can be effectively shielded by the outer wall of the first outer shell 11, the inner wall of the second inner shell 22 and the outer wall of the second connecting sheet 23, and the external interference resistance of the combined transformer is improved.

Referring to fig. 6, a first positioning groove 211 is concavely formed on the inner wall of the second housing 21. The outer wall of the second inner case 22 is concavely provided with a second positioning groove 221. The inner wall of the second connecting piece 23 is concavely provided with a third positioning groove 231. Two pins of the second conductor 6 are respectively disposed in the first positioning groove 211 and the second positioning groove 221, and a transition section of the second conductor 6 is disposed in the third positioning groove 231. The positioning of the second conductor 6 in the second housing 2 is achieved by the first positioning groove 211, the second positioning groove 221 and the third positioning groove 231, so that the overall structure is more stable.

Referring to fig. 6 and 7, the first housing 1 includes a first outer housing 11, a first inner housing 12, and a first connection piece 13 connecting between the first outer housing 11 and the first inner housing 12. The first outer shell 11 and the first inner shell 12 are both annular, and the first outer shell 11 is annularly arranged outside the first inner shell 12. The inner wall of the first outer housing 11, the outer wall of the first inner housing 12, and the inner wall of the first connecting piece 13 enclose to form a first accommodation groove. The first coil and the insulating cover 3 are both arranged in the first accommodating groove. Two first insertion holes 131 are respectively located outside the first outer shell 11 and inside the first inner shell 12, and two second insertion holes 132 are respectively located outside the first outer shell 11 and inside the first inner shell 12. The outer wall of the first connecting piece 13 is provided with a first jack groove 133, and the first jack groove 133 is communicated with the two first jacks 131. The annular first accommodating groove is adapted to the shape of the first coil, so that the first coil can be conveniently and correctly installed. The first jack groove 133 is used for accommodating the transition section of the first conductor 5, and can ensure that the first conductor 5 is stably inserted on the first housing 1, thereby enhancing the stability of the overall structure.

Referring to fig. 1 to 9, the pin group further includes a first pin group 8 and a second pin group 9. The first pin group 8 is disposed on the first housing 1 and connected to the first coil. The second pin group 9 is disposed on the second housing 2 and connected to the second coil 4. The contact pin group is used for connecting the coils, and transmits out induction current generated by electromagnetic induction, so that the contact pin group is convenient to be connected into a circuit for measurement.

Referring to fig. 1 to 9, the first pin group 8 includes a first pin holder 81 and two first pins 82. The second pin group 9 includes a second pin holder and two second pins. The first housing 1 is provided with a first pin slot 14. The second housing 2 is provided with a second pin slot 24. The first pin holder 81 is installed in the first pin slot 14, and two first pins 82 are connected to the first coil. The second pin holder is installed in the second pin slot 24, and two second pins are connected to the second coil 4. Through the cooperation of contact pin groove and contact pin seat for the installation of contact pin group is more stable, can prevent that the contact pin from becoming flexible or coming off.

Referring to fig. 1 to 9, the first pin group 8 is provided with a plurality of groups. The first pin grooves 14 are provided in plural at intervals. The plurality of first pin groups 8 are respectively installed in the plurality of first pin grooves 14. The multiple groups of first contact pin groups 8 are respectively connected into different positions, so that comprehensive detection of leakage current can be realized, the multiple groups of first contact pin groups 8 are respectively arranged in the first contact pin grooves 14 with intervals, the first contact pin groups 8 are convenient to be independently replaced, and the shell or the first contact pin seat 81 is not required to be additionally designed, so that the cost is saved. In other embodiments, multiple sets of first pins 82 are connected together through one first pin holder 81, and it is necessary to provide a first pin slot 14 with the same length or shape as the first pin holder 81 on the housing, so that the overall size of the first housing 1 is too large, or it is necessary to make the first pin holder 81 with a length and shape corresponding to the housing shape, and according to the number of the first pins 82, it is necessary to cast different first pin holders 81 with a mold, which is costly.

While the present disclosure has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration rather than of limitation. As the present disclosure may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims (10)

1. A combined type mutual inductor which comprises a main body and a plurality of auxiliary bodies, characterized by comprising the following steps:

The shell comprises a first shell and a second shell which is overlapped above the first shell, wherein the bottom of the first shell is provided with an opening, and the first shell is provided with two first jacks and two second jacks;

the insulating cover is arranged in the first shell;

the first coil is arranged in the insulating cover;

The second coil is arranged in the second shell;

The conductor is in a U-shaped bending structure, so that the conductor is provided with two pins and a transition section connected between the two pins, the conductor comprises a first conductor and a second conductor, one pin of the first conductor is inserted into one first jack and is arranged on the inner side of the first coil, the other pin of the first conductor is inserted into the other first jack and is arranged on the outer side of the first coil, one pin of the second conductor is inserted into one second jack and is arranged on the inner side of the first coil and the second coil, the other pin of the first conductor is inserted into the other second jack and is arranged on the outer side of the first coil and the second coil, and the transition section of the first conductor and the transition section of the second conductor are both arranged in the second shell;

The insulating piece is arranged in the second shell and comprises a first insulating part and a second insulating part which are connected, the first insulating part is arranged between the first conductor and the second coil, and the second insulating part is arranged between the second conductor and the second coil.

2. The combined transformer according to claim 1, wherein the second insulating portion has a U-shaped bent structure such that the second insulating portion has two first insulating strips and a second insulating strip connected between the two first insulating strips;

The two first insulating strips are respectively arranged between the two pins of the second conductor and the second coil;

the second insulating strip is arranged between the transition section of the second conductor and the second coil;

the first insulating strip is perpendicular to the first insulating portion, and the second insulating strip is parallel to the first insulating portion.

3. The combination transformer of claim 2, wherein the insulator further comprises a third insulator;

The third insulating part is erected on the first insulating part, and one of the first insulating strips is connected with the third insulating part;

The third insulating part extends from one end of the first insulating part close to the first insulating strip to one end of the first insulating part far away from the first insulating strip.

4. The combination transformer according to claim 2, wherein the width of the first insulating portion gradually increases from an end closer to the first insulating strip to an end farther from the first insulating strip;

The transition section of the first conductor is arranged at one end of the first insulating part far away from the first insulating strip.

5. The combination transformer of claim 1, wherein the second housing comprises a second outer housing, a second inner housing, and a second connection tab connecting between the second outer housing and the second inner housing;

The second outer shell and the second inner shell are annular, and the second outer shell is arranged outside the second inner shell in a surrounding manner;

the inner wall of the second outer shell, the outer wall of the second inner shell and the inner wall of the second connecting piece are enclosed to form a second accommodating groove;

the second coil and the insulating piece are arranged in the second accommodating groove.

6. The combined transformer according to claim 5, wherein a first positioning groove is concavely formed on the inner wall of the second housing;

A second positioning groove is concavely formed in the outer wall of the second inner shell;

a third positioning groove is concavely formed in the inner wall of the second connecting sheet;

The two pins of the second conductor are respectively arranged in the first positioning groove and the second positioning groove, and the transition section of the second conductor is arranged in the third positioning groove.

7. The combination transformer of claim 1, wherein the first housing comprises a first outer housing, a first inner housing, and a first connection tab connecting between the first outer housing and the first inner housing;

The first outer shell and the first inner shell are annular, and the first outer shell is arranged outside the first inner shell in a surrounding manner;

the inner wall of the first outer shell, the outer wall of the first inner shell and the inner wall of the first connecting piece are enclosed to form a first accommodating groove;

The first coil and the insulating cover are both arranged in the first accommodating groove;

The two first jacks are respectively positioned outside the first outer shell and inside the first inner shell, and the two second jacks are respectively positioned outside the first outer shell and inside the first inner shell;

The outer wall of the first connecting piece is provided with a first jack groove, and the first jack groove is communicated with the two first jacks.

8. The combination transformer of claim 1, further comprising a set of pins, the set of pins comprising a first set of pins and a second set of pins;

The first contact pin group is arranged on the first shell and connected with the first coil;

the second contact pin group is arranged on the second shell and connected with the second coil.

9. The combination transformer of claim 8, wherein the first pin set comprises a first pin base and two first pins;

The second contact pin group comprises a second contact pin seat and two second contact pins;

The first shell is provided with a first contact pin groove;

the second shell is provided with a second contact pin groove;

The first pin seat is arranged in the first pin slot, and the two first pins are connected with the first coil;

The second pin seat is arranged in the second pin groove, and the two second pins are connected with the second coil.

10. The combination transformer of claim 9, wherein the first pin set is provided with a plurality of groups;

The first contact pin grooves are arranged at intervals;

The plurality of first pin groups are respectively arranged in the plurality of first pin grooves.