JPS5828338Y2 - Trance - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a transformer equipped with a support fitting for making the entire transformer float above the mounting part, and is designed to reduce the number of component parts and ensure reliable assembly.

Generally, in large transformers, supporting metal fittings are attached to the transformer in order to eliminate losses due to short circuits in the transformer's magnetic circuit, and the iron core is configured to float above a mounting body such as a chassis.

Conventionally, such transformers include those shown in FIGS. 1 and 2.

That is, a through hole 3 is provided in the iron core 2 into which the coil 1 is incorporated,
A through hole 5 provided with an L-shaped support fitting 4 is aligned with this through hole 3, a wad rod 6 is fitted into this through hole 7L5, 3, a flat washer 7 and a spring washer 8 are fitted into the tip,
The nuts 9 are screwed together and tightened to tighten the iron core 2 and attach the support fittings 4.

However, in this configuration, the through holes 3 and 5 are considerably larger than the threaded rod 6, so that the threaded rod 6 is eccentric with respect to the through hole 3, as shown in FIG. This has the disadvantage that the height of the device changes significantly, making it impossible to install it correctly on a mounting body such as a chassis.

For this reason, as shown in FIGS. 4 and 5, a bushing 10 has been developed to eliminate the eccentricity of the threaded rod 6.

Although this bushing 10 eliminates the eccentricity of the threaded rod 6 as described above, it significantly increases the number of parts, requires time and effort to assemble, and is extremely disadvantageous in terms of cost.

In addition, recently, a U-shaped type has been developed in which a through hole is provided at the end of the iron core, and a retaining hole is provided at the end of the iron core at a position that matches the through hole and is inserted into the through hole formed by a punch or the like. A model with fixed mounting brackets has also been disclosed, but this does not indicate the concept of lifting the iron core from the mounting body such as the chassis, and only concerns the tightening of the iron core. Moreover, in this configuration, the iron core It is inconvenient to eliminate the gap between the cores that occurs due to cracks or warpage, and the positioning of the core and the mounting bracket becomes inaccurate, making it inconvenient to create a configuration in which the core is lifted by a predetermined amount from the mounting body, and further disassembly and repair are required. This had the inconvenience that there was no such thing.

The present invention eliminates the above-mentioned drawbacks of the prior art.

Hereinafter, the present invention will be explained with reference to FIGS. 6 and 7 of the drawings of one embodiment.

Reference numeral 11 denotes an iron core constructed by laminating a large number of E-type or EI-type laminated iron plates, and a coil 12 is attached to the central magnetic leg of this iron core 11.

Both sides of the upper end of the iron core 11 are tightened with fastening fittings 13, and through holes 14 penetrating in the stacking direction are formed on both sides of the lower part.

Support metal fittings 16, which are formed in an L-shape and have a conical protrusion 15 that fits into the through hole 14 at the joint surface with the iron core 11, are installed on both sides of the iron core 11.

A through hole 18 into which a threaded rod 17 is inserted is provided in the center of the protrusion 15 of one of the support fittings 16, and a through hole 18 into which a threaded rod 17 is inserted is screwed into the protrusion 15 of the other support fitting 16 to function as a nut. A screw hole 19 is formed.

That is, the protruding portion 15 of one of the supporting metal fittings 16 disposed on both sides of the iron core 11 is provided with a screw hole 19.

Then, the threaded rod 17 is inserted from the side of the support metal fitting 16 having the through hole 18 with the washer 20 fitted therein, and is screwed into the threaded hole 19 of the protrusion 15 of the other support metal fitting 16 and tightened. The iron core 11 is tightened and the supporting metal fittings 16 are fixed to the iron core 11.

With this configuration, the threaded rod 17 and the iron core 1
Even if there is a considerable difference in diameter between the two through holes 14 and the first through hole 14, the protrusion 15 of the support fitting 16 acts as a bushing to absorb the difference, so the two support fittings 16 cannot be correctly attached to the iron core 11. can.

As the transformer of the present invention is constructed as described above, the number of parts can be significantly reduced.Moreover, since a supporting metal fitting having a conical protrusion formed in a predetermined position is used, the protrusion is placed in the center of the through-hole of the iron core. Because the through hole and screw hole are located, it can be installed without shifting the position.
It will also be possible to stably attach it to a chassis, etc., which will lead to improvements in quality.

Moreover, since the iron core is tightened by threading a draw rod, even if the laminated iron plates have cracks or warpage, the tightening process can completely eliminate the gap between the laminated iron plates by applying force, which stabilizes the characteristics. , disassembly, modification, etc. are also possible.

In addition, since the number of parts is small, the work efficiency in assembly is improved, which is advantageous for mass production.Furthermore, wasteful use of resources can be eliminated, and it can be significantly advantageous in terms of cost.

It has many advantages and is of great practical value.

[Brief explanation of the drawing]

Figure 1 is an exploded perspective view of a conventional transformer, Figures 2 and 3 are cross-sectional views of the main parts of the conventional transformer, Figure 4 is an exploded perspective view of another conventional transformer, and Figure 5 is an exploded perspective view of a conventional transformer. FIG. 6 is an exploded perspective view showing an embodiment of the transformer of the present invention, and FIG. 7 is a sectional view of the essential portion. 11... Iron core, 12... Coil, 14
...Through hole, 15...Protrusion, 16...
...Supporting metal fittings, 17...Threaded rod, 18...
...Through hole, 19...Screw hole.

Claims (1)

[Scope of utility model registration request] A through hole penetrating the core in the thickness direction is provided in a part of the core around which the coil is wound, and a conical hole that fits into the through hole is provided on the joint surface of the support fittings placed on both sides of the lower part of the core with the core. A protrusion is provided, a through hole into which a threaded rod is inserted is provided in the center of the protrusion of one of the support fittings, a screw hole into which a threaded rod is screwed is provided in the protrusion of the other support fitting, and this surface support fitting is provided with a through hole into which a threaded rod is inserted. A transformer is formed by connecting the lower sides of the iron core with the above screw rods.