CN213070869U - Transformer and winding frame thereof - Google Patents

Abstract

The utility model relates to a transformer and a winding frame thereof, the transformer comprises a winding frame and an iron core group, the winding frame is mainly characterized in that an upper extension part and a lower extension part are respectively formed at the two axial ends of a hollow cylinder part, and a reinforcing rib is respectively formed at the joint of the upper extension part, the lower extension part and the cylinder part so as to improve the strength of the winding frame; the iron core group consists of two opposite iron cores, the shape of the iron core group corresponds to the cylinder part of the winding frame in a matching way, the iron core is provided with a back plate, the inner side surface of the back plate is respectively provided with a middle column and two side columns, and the joint of the middle column and the back plate is provided with a groove which is complementarily matched with the reinforcing rib; the strength of the winding frame can be improved by utilizing the structure, and the automatic winding operation is convenient.

Description

Transformer and winding frame thereof

Technical Field

The present invention relates to a transformer, and more particularly to a transformer having a reinforcing structure on a bobbin to enhance strength and facilitate automatic winding operation.

Background

The transformer basically comprises a bobbin on which a primary winding and a secondary winding are sequentially wound, and an iron core group consisting of two opposite iron cores, which may be of EI type or EE type, and which are oppositely combined on the bobbin on which the primary winding and the secondary winding are wound; the primary winding and the secondary winding are wound on the winding frame, and at present, automatic winding operation is mostly carried out, which is beneficial to improving the operation efficiency and the productivity. However, the bobbin is made of plastic, and the overall thickness of the bobbin is limited in consideration of material cost and weight, and when the bobbin is wound by an automatic device, a large stress is generated on the bobbin, especially at the corner, when the strength of the corner of the bobbin is insufficient, the bobbin may be damaged in the winding process, and the yield is affected.

Furthermore, the transformer is often used in the related products of power supply, and the requirements on safety specifications are relatively high due to the related power conversion, for example, the outgoing lines of the primary winding and the secondary winding are not overlapped, and the outgoing line structure of the bobbin must meet the requirements of safety regulations and automation operation.

SUMMERY OF THE UTILITY MODEL

Therefore, the present invention is directed to a transformer, which has a reinforcing structure on the bobbin and the core assembly, and can effectively improve the strength of the bobbin and maintain the high efficiency of the transformer.

The main technical means adopted to achieve the above purpose is to make the transformer include:

the bobbin comprises a hollow barrel part, wherein an upper extending part and a lower extending part are respectively formed at two axial ends of the barrel part, and a reinforcing rib is respectively formed at the joint of the upper extending part, the lower extending part and the barrel part;

the iron core group consists of two opposite iron cores, each iron core is provided with a back plate, a middle column and two side columns are respectively formed on the inner side surface of each back plate, an upper notch and a lower notch are respectively formed at the upper end and the lower end of each back plate, a groove is respectively formed at the joint of each upper notch and each lower notch and the middle column, and the grooves correspond to the reinforcing ribs on the winding frame and are matched and complemented.

According to the transformer, the protruding reinforcing ribs are formed at the joint of the cylinder part of the winding frame and the upper and lower extension parts respectively, the reinforcing ribs are utilized to improve the structural strength of the joint, and the grooves are formed in the iron core of the iron core set in a matching mode to achieve complementary matching, so that the strength of the winding frame can be effectively improved, and the automatic winding operation is facilitated.

Drawings

Fig. 1 is an external view of a preferred embodiment of the present invention.

Fig. 2 is a top perspective view of the bobbin according to a preferred embodiment of the present invention.

Fig. 3 is a bottom perspective view of the bobbin according to a preferred embodiment of the present invention.

Fig. 4 is a perspective view of an iron core according to a preferred embodiment of the present invention.

Fig. 5 is a plan view of a core according to a preferred embodiment of the present invention.

Fig. 6 is a combined cross-sectional view of a preferred embodiment of the present invention.

Fig. 7 is a front perspective view of another preferred embodiment of the present invention.

Fig. 8 is a rear perspective view of another preferred embodiment of the present invention.

Detailed Description

The following description will be made in conjunction with the accompanying drawings and the preferred embodiments of the present invention to further illustrate the technical means adopted to achieve the objects of the present invention.

Referring to fig. 1, a preferred embodiment of the present invention includes a bobbin 10 and an iron core assembly 20, wherein the bobbin 10 is used for winding coils to form a primary winding and a secondary winding (not shown), and the iron core assembly 20 is disposed on the bobbin 10 and covers the primary winding and the secondary winding thereon; wherein

Referring to fig. 2 and 3, the bobbin 10 has a hollow cylindrical portion 11, the cylindrical portion 11 has two opposite flat walls and two opposite arc walls, an upper extending portion 12 and a lower extending portion 13 are respectively formed at two ends of the two flat walls of the cylindrical portion 11, a side plate 14 is respectively formed at two ends of the two arc walls of the cylindrical portion 11, and the upper extending portion 12, the lower extending portion 13 and the side plate 14 are used for winding the primary winding and the secondary winding in a space surrounded by an outer cylindrical wall of the cylindrical portion 11.

A protruding reinforcing rib 15 is formed at the joint of the upper extension 12 and the lower extension 13 and the two ends of the flat wall of the cylindrical portion 11, and since the upper extension 12 and the lower extension 13 extend in the axial direction of the cylindrical portion 11, the reinforcing rib 15 is formed at the corners of the flat wall and the upper extension 12 and the lower extension 13, respectively.

In this embodiment, at least one of the lower extending portions 13 has a plurality of pins 16 for the outgoing line end of the primary winding to be wound thereon, in order to avoid the outgoing line cross of the primary winding and the secondary winding, a plurality of deep wire slots 130 are formed at the bottom of the lower extending portion 13 where the pins 16 are disposed, each deep wire slot 130 is formed between adjacent pins 16, so that the outgoing line of the primary winding is wound on the pins 16 through the deep wire slots 130 to avoid the outgoing line of the secondary winding.

Furthermore, a winding post 17 is formed on each of the two upper extensions 12 for the outgoing line of the secondary winding to bypass and then be pulled out in a straight-down manner, thereby avoiding the outgoing line of the primary winding.

Referring to fig. 4 and 5, in the present embodiment, the iron core assembly 20 is composed of two iron cores 21 with identical shapes, the iron core 21 has a back plate 22, a central pillar 23 and two side pillars 24 are respectively formed on opposite inner side surfaces of the back plate 22, the central pillar 23 is matched in shape with the cylindrical portion 11 of the bobbin 10 to have two opposite flat surfaces 230, and the flat surfaces 230 correspond to the flat walls of the cylindrical portion 11; an upper notch 221 and a lower notch 222 are respectively formed at the upper end and the lower end of the back plate 22, wherein the width of the lower notch 222 is greater than that of the upper notch 221, and the upper notch 221 and the lower notch 222 are respectively used as wire outlet windows of the secondary winding and the primary winding by matching with the winding posts 17 and the deep wire slots 130 on the bobbin 10, so as to ensure that the wire outlet of the primary winding and the secondary winding are not crossed.

As described above, the center pillar 23 of the core 21 has two planar sections 230, and the radial wall of the center pillar 23 is still arc-shaped except for the two planar sections 230, so that the design can reduce the circumference of the center pillar 23 as much as possible while ensuring the Ae value, so as to reduce the Direct Current Resistance (DCR) of the transformer as much as possible, thereby ensuring high efficiency.

Furthermore, the back plate 22 of the iron core 21 is formed with a groove 25 at the adjacent positions of the upper notch 221, the lower notch 222 and the tangent plane 230 of the center pillar 23, the groove 25 corresponds to the reinforcing rib 15 on the bobbin 10, the two iron cores 21 of the iron core set 20 are assembled to the bobbin 10 in a state as shown in fig. 6, the center pillars 23 of the two iron cores 21 are inserted from the two axial ends of the cylinder 11 of the bobbin 10, and the grooves 25 on the two iron cores 21 are adapted to the reinforcing ribs 15 at the joint of the cylinder 11 and the upper extension 12 and the lower extension 13.

The two side columns 24 of the two iron cores 21 relatively cover the winding space surrounded by the side plates 14, the upper extension part 12, the lower extension part 13 and the outer cylinder wall of the cylinder part 11, and the upper end and the lower end of the cylinder part 11 which are not covered by the iron core group 20 are used as outlet windows of the secondary winding and the primary winding.

Fig. 7 shows another preferred embodiment of the present invention, which further includes a fixing base 30 for fixing the bobbin 10 and the core assembly 20 combined with each other; the fixing base 30 mainly forms a back plate 32 extending in the vertical direction on the back of a rectangular platform 31, the two ends of the platform 31 respectively extend in the vertical direction to form a blocking edge 311, the blocking edge 311 extends to the front end of the platform 31, and a gap is formed at the front end of the platform 31; the two ends of the back plate 32 also extend forward in the right angle direction to form a side retaining edge 321, the side retaining edge 321 is connected with the retaining edge 311, the platform 31, the back plate 32, the retaining edge 311 and the space surrounded by the side retaining edge 321 are suitable for fixing the iron core assembly 20 therebetween, and the bobbin 10 covered by the iron core assembly 20 on the barrel portion 11 thereof enables the lower extension portion 13 and the pins 16 thereon to be exposed from the notch at the front end of the platform 31 for assembling the plug-in unit.

Referring to fig. 8, two bumps 33 are formed at the lower end of the back surface of the back plate 32 of the fixing base 30, and a wire groove 330 is formed on each bump 33 for passing an outgoing wire of a direct-type down-draw secondary winding.

As can be seen from the above description, the present invention mainly forms the complementary reinforcing ribs and grooves on the barrel portion of the bobbin and the iron core of the iron core set, thereby ensuring the structural strength of the bobbin itself and facilitating the automatic operation; and the cylinder part of the winding frame is respectively provided with an upper extension part and a lower extension part, the upper extension part is provided with a winding post, the bottom surface of the lower extension part is provided with a deep wire groove to respectively provide a secondary winding and a primary winding for wire outgoing, so that the wire outgoing cross of the primary winding and the secondary winding is avoided, the automation is convenient, and the safety requirement is also met. Meanwhile, in the design of the center pillar of the iron core, the perimeter of the center pillar is shortened as much as possible on the premise of ensuring the Ae value, and high efficiency is maintained.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the above preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make modifications or equivalent changes within the scope of the technical solution of the present invention, but all the modifications, equivalent changes and modifications made to the above embodiments according to the technical solution of the present invention are within the scope of the technical solution of the present invention.

Claims (10)

1. A transformer, comprising:

the bobbin comprises a hollow barrel part, wherein an upper extending part and a lower extending part are respectively formed at two axial ends of the barrel part, and a reinforcing rib is respectively formed at the joint of the upper extending part, the lower extending part and the barrel part;

the iron core group consists of two opposite iron cores, each iron core is provided with a back plate, a middle column and two side columns are respectively formed on the inner side surface of each back plate, an upper notch and a lower notch are respectively formed at the upper end and the lower end of each back plate, a groove is respectively formed at the joint of each upper notch and each lower notch and the middle column, and the grooves correspond to the reinforcing ribs on the winding frame and are matched and complemented.

2. The transformer of claim 1, wherein the bobbin of the bobbin has two opposite flat walls and two opposite arc walls, the bobbin forms the upper extension and the lower extension at both ends of the two flat walls, respectively, and the bobbin forms a side plate at both ends of the two arc walls, respectively;

the center pillar of iron core has two relative plain noodles, the plain noodles corresponds to the flat wall of section of thick bamboo portion.

3. The transformer of claim 2, wherein the barrel portion of the bobbin forms the reinforcing ribs at junctions of both ends of the flat wall and the upper and lower extensions.

4. The transformer of claim 1, wherein the lower extension of the bobbin is provided with a plurality of legs, and a bottom of the lower extension is formed with a plurality of deep wire slots, each deep wire slot being formed between the plurality of legs;

and the two upper extending parts of the winding frame are respectively provided with a winding post.

5. The transformer of claim 1, wherein the back plate has a lower notch width greater than the upper notch width.

6. The transformer according to any one of claims 1 to 5, comprising a fixing base, wherein the fixing base is mainly formed by extending a back plate in a vertical direction on the back of a rectangular platform, two ends of the platform respectively extend in the vertical direction to form a blocking edge, the blocking edge extends to the front end of the platform, and a gap is formed at the front end of the platform;

the two ends of the rear plate extend towards the right-angle direction to form a side blocking edge respectively, the lower end of the back surface of the rear plate is provided with two convex blocks, and the convex blocks are provided with a wire groove respectively.

7. The bobbin of the transformer is characterized in that the bobbin is provided with a hollow barrel part, an upper extending part and a lower extending part are respectively formed at two axial ends of the barrel part, and a reinforcing rib is respectively formed at the joint of the upper extending part, the lower extending part and the barrel part.

8. The bobbin of the transformer as claimed in claim 7, wherein the barrel portion of the bobbin has two opposite flat walls and two opposite arc walls, the barrel portion is formed with the upper extension and the lower extension at both ends of the two flat walls, respectively, and the barrel portion is formed with a side plate at both ends of the two arc walls, respectively.

9. The bobbin of the transformer as claimed in claim 8, wherein the cylindrical portion of the bobbin forms the reinforcing ribs at junctions of both ends of the flat wall and the upper and lower extensions.

10. The bobbin of the transformer as claimed in claim 7, wherein the lower extension part of the bobbin is provided with a plurality of legs, and a plurality of deep wire slots are formed at the bottom of the lower extension part, and each deep wire slot is formed between the plurality of legs;

and the two upper extending parts of the winding frame are respectively provided with a winding post.

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