A transformer skeleton

Abstract

The utility model discloses a transformer framework belongs to electronic transformer technical field. A transformer framework, including the reel for winding wire package, still include the first boss of fixed setting in the secondary terminal board one end, the second boss of fixed setting for fixing secondary intermediate pin in secondary terminal board other end, and the working surface of second boss is higher than the working surface of first boss, when hot dipping tin, and the connection of secondary outside pin root and secondary intermediate pin root is parallel with tin liquid level, the utility model discloses through the working surface of high second boss, through the main body of partial lifting framework, immerse secondary outside pin and secondary intermediate pin in tin liquid, can solder tin under the state of inclination, can utilize existing tool and technology to realize fast accurate soldering tin, avoid scalding and form the risk of badness, and do not increase the equipment of investment, give both sides production reliability and production feasibility, help to improve production efficiency, satisfy customer high safety standard requirement and withstand voltage requirement.

Description

Technical Field

[0001] This utility model relates to the field of electronic transformer technology, and in particular to a transformer frame. Background Technology

[0002] The transformer frame is an important component of the transformer. It not only provides physical support for the windings, but also helps to form a magnetic circuit to reduce energy loss. Transformer frames are classified into two types according to their shape: vertical and horizontal.

[0003] The frame used in small power transformers is usually made of bakelite, with metal terminals installed in specific positions. The metal conductors of the internal windings are wound around the metal terminals and soldered to serve as the input and output of the transformer. For transformers with multiple outputs, there are many secondary metal terminals, and the creepage distance between each output terminal meets the requirement of 8.0mm.

[0004] Currently, in horizontal frame-type soldering systems, because the bottom of the secondary output terminal is flat, during hot-dip soldering, the pins in the middle of the frame are too close to the coil. When soldering the copper wires on the middle pins, the molten solder (around 400℃) comes into contact with the coil, posing a risk of scalding and causing abnormal heat damage. Existing solutions include: First, using a conventional method for the outer pins, tilting the frame for soldering, while manually soldering the inner pins with a soldering iron. However, this requires high skill levels from employees and is extremely inefficient, potentially causing issues such as dull pins and solder buildup in some products. Second, using other soldering methods, such as jet soldering or laser soldering. However, this requires purchasing equipment and specialized personnel for debugging and setup. While the production efficiency is higher than the first method, it is lower than the efficiency of mass hot-dip soldering, making it difficult to meet production requirements. Utility Model Content

[0005] The purpose of this invention is to solve the problem that the secondary pins are easily scalded by molten solder during hot-dip tinning in the prior art, and to propose a transformer frame.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A transformer frame includes a spool for winding a coil. A primary terminal plate and a secondary terminal plate are fixedly disposed at both ends of the spool, and a first boss is fixedly disposed at one end of the secondary terminal plate for fixing a secondary outer pin. A second boss is fixedly disposed at the other end of the secondary terminal plate for fixing a secondary middle pin. The working surface of the second boss is higher than the working surface of the first boss, and the first boss and the second boss are connected by a transition surface. When hot-dip tinning is performed, the line connecting the root of the secondary outer pin and the root of the secondary middle pin is parallel to the surface of the molten tin.

[0008] To facilitate the machining of the second boss, preferably, the working surface of the second boss is parallel to the working surface of the first boss.

[0009] In order to increase the distance between the working surface of the second boss and the outer wall of the coil, the distance between the working surface of the second boss and the working surface of the first boss is further 0.5-10mm.

[0010] To facilitate the connection between the second boss and the first boss, preferably, the transition surface is an inclined surface.

[0011] Furthermore, the angle of the inclined plane is in the range of 10-20°.

[0012] Preferably, multiple sets of the first boss and the second boss are provided.

[0013] Furthermore, lead wire grooves are provided between adjacent bosses.

[0014] Preferably, the distance 'a' between adjacent secondary intermediate pins is greater than 8 mm.

[0015] Preferably, the distance b between the outer secondary pin and the middle secondary pin is greater than 8mm.

[0016] Preferably, the reel, primary terminal board, and secondary terminal board are all made of bakelite.

[0017] Compared with the prior art, the present invention provides a transformer frame with the following advantages:

[0018] 1. This transformer frame, by raising the working surface of the second boss, increases the distance between the root of the secondary intermediate pin and the coil. When using hot-dip soldering, by partially raising the main body of the frame, the secondary outer pin and the secondary intermediate pin are immersed in the molten solder, allowing soldering in an inclined state. It can achieve fast and accurate soldering using existing tools and processes, avoiding the risk of burns, and does not require additional equipment investment. It balances production reliability and feasibility, helps improve production efficiency, meets customers' high safety and voltage requirements, and enhances product competitiveness.

[0019] 2. The transformer frame is connected to the first boss via a bevel, which increases the connection strength between the second boss and the secondary terminal block and improves its service life.

[0020] The parts of this device not described herein are the same as or can be implemented using existing technologies. This utility model, by raising the working surface of the second boss, allows the secondary outer pin and the secondary middle pin to be immersed in molten solder by partially raising the main body of the frame during hot-dip soldering. Soldering can be performed in an inclined state. Existing tools and processes can be used to achieve fast and accurate soldering, avoiding the risk of burns and other adverse effects. Moreover, it does not increase the investment in equipment, takes into account production reliability and feasibility, helps to improve production efficiency, meets customers' high safety and pressure resistance requirements, and enhances product competitiveness. Attached Figure Description

[0021] Figure 1 A schematic diagram of the structure of a transformer frame proposed in this utility model. Figure 1 ;

[0022] Figure 2 A schematic diagram of the structure of a transformer frame proposed in this utility model. Figure 2 ;

[0023] Figure 3 A schematic diagram of the structure of a transformer frame proposed in this utility model. Figure 3 ;

[0024] Figure 4 This is a partial cross-sectional view of a transformer frame proposed in this utility model;

[0025] Figure 5 This is a top view of a transformer frame proposed in this utility model.

[0026] In the diagram: 1. Reel; 2. Primary terminal board; 3. Secondary terminal board; 301. First boss; 302. Second boss; 303. Inclined surface. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0028] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Example:

[0030] Reference Figures 1-5 A transformer frame includes a spool 1 for winding a coil. A primary terminal plate 2 and a secondary terminal plate 3 are fixedly disposed at both ends of the spool 1. A primary lead is fixedly disposed on the primary terminal plate 2. The spool 1, primary terminal plate 2, and secondary terminal plate 3 are preferably made of bakelite, meaning a winding area is formed between the primary terminal plate 2 and the secondary terminal plate 3. When the coil is wound onto the spool 1, the two sides of the coil can be limited to ensure the winding effect. The frame also includes a first boss 301 fixedly disposed at one end of the secondary terminal plate 3 for fixing the secondary outer lead, and a secondary middle lead fixedly disposed at the other end of the secondary terminal plate 3. The second boss 302 is close to the reel 1, and the working surface of the second boss 302 is higher than the working surface of the first boss 301. The first boss 301 and the second boss 302 are connected by a transition surface. When hot-dip tinning is performed, the line connecting the root of the secondary outer pin and the root of the secondary middle pin is parallel to the molten tin surface and immersed in the molten tin. At this time, the transformer frame is tilted, which can keep the coil away from the molten tin. This not only reduces the risk of being burned, but also allows for hot-dip soldering without increasing equipment investment. It takes into account production reliability and feasibility, improves production efficiency, meets customers' high safety and voltage requirements, and enhances product competitiveness.

[0031] In use, by raising the working surface of the second boss 302, the distance between the root of the secondary intermediate pin and the coil is increased. When using hot-dip soldering, by partially raising the main body of the frame, the secondary outer pin and the secondary intermediate pin are immersed in the molten solder, which can be soldered in an inclined state. Existing tools and processes can be used to achieve fast and accurate soldering, avoiding the risk of burns and other adverse effects. Moreover, it does not increase the investment in equipment, takes into account the reliability and feasibility of production, helps to improve production efficiency, meets the high safety and pressure resistance requirements of customers, and enhances product competitiveness.

[0032] Reference Figure 1 , Figure 2 and Figure 4 The working surface of the second boss 302 is parallel to the working surface of the first boss 301. That is, the height of the second boss 302 is increased based on the original height of the first boss 301. The structure is simple and easy to promote and use.

[0033] Reference Figures 1-3 The distance between the working surface of the second boss 302 and the working surface of the first boss 301 is 0.5-10mm. Here, we prefer 1.5mm. This can increase the distance between the root of the secondary intermediate pin and the outer wall of the coil. Moreover, when tilting the tin dipping, it can increase the distance between the outer wall of the coil and the molten solder, reduce the risk of the coil being burned, and improve production quality.

[0034] Reference Figures 1-4 The transition surface can be a stepped surface. Here, we prefer to use a slope 303 as the transition surface. By connecting the first boss 301 and the second boss 302 through the slope 303, the connection strength between the second boss 302 and the first boss 301 can be increased. The angle of the slope 303 is in the range of 10-20°. Here, we prefer 15°. During soldering, the slope 303 can be oriented towards the molten solder and parallel to the surface of the molten solder. Then, the secondary outer pin and the secondary middle pin are immersed in the molten solder, which facilitates soldering and improves the performance.

[0035] Reference Figure 1 and Figure 4 The first boss 301 and the second boss 302 are both provided with multiple sets. Here, we set a total of five sets of secondary pins, that is, there are five outputs. Among them, there are two sets of secondary outer pins and three sets of secondary middle pins. Each set has two pins. Each pin is located on a separate boss. Moreover, lead wire grooves are opened between adjacent bosses to facilitate the passing of wires and realize the connection with the corresponding pins.

[0036] Reference Figure 5 According to safety specifications, the electrical clearance should be 5.0 mm or more, and the creepage distance should be 6.4 mm or more. Higher requirements may require a creepage distance of 8.0 mm or more. Therefore, we design the distance 'a' between adjacent secondary intermediate pins to be greater than 8 mm, and the distance 'b' between the outer secondary pin and the secondary intermediate pin to be greater than 8 mm. Furthermore, we prefer the values ​​of 'a' and 'b' to be 9 mm to ensure safe distances and improve safety in use.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A transformer frame, comprising a reel (1) for winding a coil, wherein a primary terminal plate (2) and a secondary terminal plate (3) are respectively fixedly disposed at both ends of the reel (1), characterized in that, It also includes a first boss (301) fixedly disposed at one end of the secondary terminal board (3) for fixing the secondary outer pins. The secondary terminal board (3) has a second boss (302) fixedly provided at the other end for fixing the secondary intermediate pin. The working surface of the second boss (302) is higher than the working surface of the first boss (301), and the first boss (301) and the second boss (302) are connected by a transition surface. When hot-dip tinning is performed, the line connecting the root of the secondary outer pin and the root of the secondary intermediate pin is parallel to the molten tin surface.

2. The transformer frame according to claim 1, characterized in that, The working surface of the second boss (302) is parallel to the working surface of the first boss (301).

3. A transformer frame according to claim 2, characterized in that, The distance between the working surface of the second boss (302) and the working surface of the first boss (301) is 0.5-10mm.

4. A transformer frame according to claim 1, characterized in that, The transition surface is an inclined plane (303).

5. A transformer frame according to claim 4, characterized in that, The angle range of the inclined plane (303) is 10-20°.

6. A transformer frame according to claim 1, characterized in that, The first boss (301) and the second boss (302) are each provided with multiple sets.

7. A transformer frame according to claim 6, characterized in that, A lead wire groove is provided between adjacent bosses.

8. A transformer frame according to claim 1, characterized in that, The distance 'a' between adjacent secondary intermediate pins is greater than 8mm.

9. A transformer frame according to claim 1, characterized in that, The distance b between the outer secondary pin and the middle secondary pin is greater than 8mm.

10. A transformer frame according to claim 1, characterized in that, The reel (1), primary terminal board (2) and secondary terminal board (3) are all made of bakelite.

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