CN215342200U

CN215342200U - Network transformer adopting efficient welding process

Info

Publication number: CN215342200U
Application number: CN202121280724.8U
Authority: CN
Inventors: 钟武昌; 陈春宇
Original assignee: Anshun Chengwei Science & Technology Co ltd
Current assignee: Anshun Chengwei Science & Technology Co ltd
Priority date: 2021-06-09
Filing date: 2021-06-09
Publication date: 2021-12-28
Anticipated expiration: 2031-06-09

Abstract

The utility model provides a network transformer adopting an efficient welding process, which comprises a plastic rubber shell and a plurality of groups of transformer coils, wherein the plastic rubber shell is provided with a plurality of groups of transformer coils; two welding platforms are respectively arranged on two sides of the top of the plastic rubber shell; a plurality of leading-out pins are arranged in the side wall of the plastic rubber shell below each welding platform, the lower ends of the leading-out pins extend out of the plastic rubber shell, and the upper ends of the leading-out pins are fixed in the side wall of the plastic rubber shell; a plurality of mounting holes are formed in the top of the welding platform; two sides of each mounting hole are respectively provided with a positioning wire groove; the upper end of the leading-out pin upwards penetrates through the welding platform and then extends into the mounting hole; the outgoing line of the transformer coil is clamped in the positioning wire slot, and the part of the outgoing line in the mounting hole is in contact with the upper end of the outgoing pin and is not coated with a paint film; and solder paste for welding the lead-out pins and the lead-out wires together through reflow soldering is filled in the mounting cavity. The utility model effectively solves the problems of short circuit and weldability of connection, saves winding operation, saves labor, improves production efficiency and shortens manufacturing period.

Description

Network transformer adopting efficient welding process

Technical Field

The utility model belongs to the technical field of network transformer wiring welding, and particularly relates to a network transformer adopting an efficient welding process.

Background

For a common network transformer, generally, a transformer coil (the transformer coil is composed of a magnetic core and an insulated enameled wire wound on the magnetic core) is arranged in an open type rubber case (for example, an SMD type network transformer arranges the used coil in a space), then one end of a lead-out pin at two sides of the rubber case is wound by a lead-out wire of the transformer coil for 2-3 circles, a tail wire is cut off, and then a transformer module is manufactured by tin immersion welding in a high-temperature tin furnace; because the mode is easy to cause short circuit in the manufacturing process, particularly the distance between pins is particularly obvious at 1.0mm, the manufactured module elements have more or less hidden dangers, hidden dangers of cold joint and wire breakage are easy to appear, and the manufactured network transformer generates distortion and data packet loss phenomena on transmission signals in application.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, an object of the present invention is to provide a network transformer using an efficient welding process, which uses a new structure and welding process, effectively solves the problems of short circuit and weldability in connection, improves production efficiency, and shortens manufacturing cycle.

The utility model is realized by the following technical scheme:

a network transformer adopting an efficient welding process comprises a plastic rubber shell and a plurality of groups of transformer coils arranged in the plastic rubber shell; two welding platforms are respectively arranged on two sides of the top of the plastic rubber shell; a plurality of L-shaped metal leading-out pins are arranged in the side wall of the plastic rubber shell below each welding platform, the lower ends of the leading-out pins extend out of the plastic rubber shell, and the upper ends of the leading-out pins are fixed in the side wall of the plastic rubber shell; a plurality of mounting holes (the size of the holes is about 0.8 x 0.5 mm) which are in one-to-one correspondence with the leading-out pins are arranged at the top of the welding platform; two sides of each mounting hole are respectively provided with a positioning wire groove communicated with the mounting hole; the upper end of the leading-out pin upwards penetrates through the welding platform and then extends into the corresponding mounting hole; outgoing lines of the transformer coil correspond to the mounting holes one by one and are clamped in the positioning wire grooves on two sides of the mounting holes, and the parts of the outgoing lines in the mounting holes are in contact (parallel contact) with the upper ends of the outgoing pins and are not coated with paint films; and solder paste for welding the lead-out pins and the lead-out wires together through reflow soldering is filled in the mounting cavity.

Further, the mounting hole is a square or circular groove.

Furthermore, the positioning line grooves on the two sides of each mounting hole are positioned on the same straight line.

Furthermore, the positioning wire slot is tightly matched with the outgoing line of the transformer coil.

Further, the depth of the positioning wire groove is equal to the depth of the mounting hole.

Furthermore, the magnetic core of the transformer coil is fixed in the plastic rubber shell through a high voltage-resistant insulating material encapsulated in the plastic rubber shell. So as to ensure the fixation of the magnetic core of the transformer with the outer shell and simultaneously isolate the high-voltage insulation of the cable end and the CHIP end.

Furthermore, the top of the plastic rubber shell is connected with a top cover which covers the welding platform, the mounting hole on the welding platform and the positioning wire groove. So as to automatically pick up the patch when the patch is stuck; meanwhile, the welding spot of the transformer can be protected, and the transformer can be prevented from being damaged.

Furthermore, the parts of the lead-out pins and the lead-out wires, which are positioned in the mounting holes, are coated by solder paste and then are welded together by IR reflow soldering at 260 ℃.

The network transformer adopts a new structure and a welding process, two positioning wire grooves are added to fix the outgoing wires and parallelly contact with the metal top platforms of the outgoing pins by reasonably improving the wiring mode of a transformer coil, and a mounting hole is designed above the top platform of each outgoing pin terminal to be filled with solder paste; before adding solder paste, firstly removing an insulated enamelled film from an enamelled wire on the top of the platform by using laser, and firmly welding a leading-out wire and a leading-out pin (completely equal to the reflow soldering effect of a PCB and a component) by IR reflow soldering at 260 ℃ after adding the solder paste; the improvement effectively solves the solderability problem of short circuit and connection, saves the winding operation, saves labor, improves the production efficiency, shortens the manufacturing period, is suitable for automatic operation, and can meet the requirements of manufacturing all network transformers. All electrical parameters of the network transformer can meet the specified technical parameter requirements of IEEE802.3, and can inhibit electromagnetic waves from the periphery and electromagnetic pulse interference generated by chip elements.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of the structure of a network transformer according to the present invention;

shown in the figure: 1-plastic rubber shell, 2-transformer coil, 3-welding platform, 4-leading-out pin, 5-mounting hole, 6-positioning wire groove, 7-leading-out wire and 8-tin paste.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

It should be understood that the structures, proportions, and dimensions shown in the drawings and described herein are for illustrative purposes only and are not intended to limit the scope of the present invention, which is defined by the claims, but rather by the claims. In addition, the terms such as "upper", "lower", "left", "right" and "middle" used in the present specification are for convenience of description only, and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship thereof may be regarded as the scope of the present invention without substantial changes in the technical contents.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

as shown in fig. 1, the network transformer adopting the high-efficiency welding process of the present invention includes a plastic rubber case 1 with a closed periphery and an open top, and a plurality of sets of transformer coils 2 arranged inside the plastic rubber case 1, wherein magnetic cores of the transformer coils 2 are fixed in the plastic rubber case 1 through a high voltage-resistant insulating material encapsulated in the plastic rubber case; so as to ensure the fixation of the magnetic core of the transformer with the outer shell and simultaneously isolate the high-voltage insulation of the cable end and the CHIP end. Two sides of the top of the plastic rubber shell 1 are respectively provided with a welding platform 3 (a strip shape is integrally arranged on the top of the plastic rubber shell 1); a plurality of L-shaped (or J-shaped) metal lead-out pins 4 (with conductivity) are arranged in the side wall of the plastic rubber shell 1 below each welding platform 3. The lower end (horizontal end) of the leading-out pin 4 extends out of the plastic rubber shell 1, and the upper end (vertical end) is fixed in the side wall of the plastic rubber shell 1. A plurality of mounting holes 5 which are in one-to-one correspondence with the leading-out pins 4 are arranged at the top of the welding platform 3 (each mounting hole 5 corresponds to the Yuge leading-out pin 4), the size of each mounting hole 5 is set to be a cavity of about 0.8 x 0.5mm, and the mounting holes are square or circular grooves. Two sides of each installation hole 5 are respectively provided with a positioning wire casing 6 communicated with the installation hole 5, the two positioning wire casings 6 are positioned on the same straight line, and the depth of each positioning wire casing 6 is equal to that of the installation hole 5. The upper ends (vertical ends) of the leading-out pins 4 upwards penetrate through (penetrate through) the welding platform 3 and then extend into the corresponding mounting holes 5. The outgoing lines 7 of the transformer coils 2 correspond to the mounting holes 5 one by one and are clamped in the positioning wire grooves 6 on two sides of the mounting holes 5 (each transformer coil 2 is provided with at least one pair of outgoing lines 7, each outgoing line 7 corresponds to one mounting hole 5), and the positioning wire grooves 6 are in tight fit with the outgoing lines 7. The part of the lead-out wire 7 positioned in the mounting cavity 5 is contacted (in parallel contact) with the upper end of the lead-out pin 4 and is not coated with a paint coating. The mounting cavity 5 is filled with a solder paste 8 for soldering the lead pins 4 and the lead wires 7 together by reflow soldering. The lead pins 4 and the lead wires 7 are coated with solder paste 8 at the positions in the mounting holes 5 and then soldered together by IR reflow at 260 ℃.

During wiring, one outgoing line 7 of each transformer coil 2 is arranged above one installation hole 5, then the parts on two sides of the installation hole 5 are clamped into the positioning wire grooves 6, and meanwhile, the part between the two positioning wire grooves 6 enters the positioning hole 5 and is connected with the tops of the outgoing pins 4 (the tops of the outgoing pins 4 extend into the tops of the positioning holes 5). And sequentially installing all the lead-out wires 7 into the corresponding installation holes 5 according to the steps. Then, removing the insulated enamel coating from the outgoing line 7 (enameled wire) at the top of the outgoing pin 4 by using laser, and contacting the part of the outgoing line with the enamel coating removed with the top of the outgoing pin 4; then, solder paste is added into the mounting holes, and finally, the lead-out wire 7 and the lead-out pin 4 of the transformer coil 2 can be firmly welded through IR reflow soldering at 260 ℃.

Example two:

the difference between this embodiment and the first embodiment is:

the top of the plastic rubber shell 1 is connected with a top cover which covers the welding platform 3, the upper mounting hole 5 and the positioning wire casing 6. So as to automatically pick up the patch when the patch is stuck; meanwhile, the welding spots of the transformer can be protected and prevented from being damaged. Compared with the conventional transformer, the welding spots are protected by the top cover and are not easy to be damaged.

It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The scope of the present invention is not limited to the technical solutions disclosed in the embodiments, and any modifications, equivalent substitutions, improvements, etc. made to the above embodiments according to the technical spirit of the present invention fall within the scope of the present invention.

Claims

1. A network transformer adopting an efficient welding process comprises a plastic rubber shell and a plurality of groups of transformer coils arranged in the plastic rubber shell; two welding platforms are respectively arranged on two sides of the top of the plastic rubber shell; a plurality of L-shaped metal leading-out pins are arranged in the side wall of the plastic rubber shell below each welding platform, the lower ends of the leading-out pins extend out of the plastic rubber shell, and the upper ends of the leading-out pins are fixed in the side wall of the plastic rubber shell; the method is characterized in that: a plurality of mounting holes which correspond to the leading-out pins one by one are formed in the top of the welding platform; two sides of each mounting hole are respectively provided with a positioning wire groove communicated with the mounting hole; the upper end of the leading-out pin upwards penetrates through the welding platform and then extends into the corresponding mounting hole; outgoing lines of the transformer coil correspond to the mounting holes one by one and are clamped in the positioning wire grooves on two sides of the mounting holes, and the parts of the outgoing lines in the mounting holes are in contact with the upper ends of the outgoing pins and are not coated with paint films; and solder paste for welding the lead-out pins and the lead-out wires together through reflow soldering is filled in the mounting cavity.

2. The network transformer using the high efficiency welding process as claimed in claim 1, wherein: the mounting hole is a square or circular groove.

3. The network transformer using the high efficiency welding process as claimed in claim 1, wherein: the positioning line grooves on two sides of each mounting hole are positioned on the same straight line.

4. The network transformer using the high efficiency welding process as claimed in claim 1, wherein: and the positioning wire grooves are tightly matched with the outgoing lines of the transformer coils.

5. The network transformer using the high efficiency welding process as claimed in claim 1, wherein: the depth of the positioning wire groove is equal to the depth of the mounting hole.

6. The network transformer using the high efficiency welding process as claimed in claim 1, wherein: and the magnetic core of the transformer coil is fixed in the plastic rubber shell through a high voltage-resistant insulating material encapsulated in the plastic rubber shell.

7. The network transformer using the high efficiency welding process as claimed in claim 1, wherein: the top of the plastic rubber shell is connected with a top cover which covers the welding platform, the mounting hole on the welding platform and the positioning wire casing.

8. The network transformer using high efficiency welding process as claimed in any one of claims 1-7, wherein: and the parts of the leading-out pins and the leading-out wires, which are positioned in the mounting holes, are welded together through IR reflow soldering at 260 ℃ after being coated by solder paste.