JPH0442061Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an arc welding machine, and more particularly to the structure of a transformer in which a coil is directly wound around an iron core via a winding frame.

[Conventional technology]

In general, this type of arc welding machine consists of a transformer 1, an iron core 2 constituting the transformer 1, a winding frame 3, a coil 4, a support 5, and a trolley on which the transformer 1 is placed and fixed. 6. Consists of a movable core 7 for adjusting the secondary current, a handle 8 for current adjustment connected to it, a cooling fan 9 for forced air cooling, an electric shock prevention device 10, and other electrical parts such as a switch 11 and a fuse 12. are doing. Note that 13 is the case,
14 is a wheel, and 15 is a hanging device. As shown in Figure 6, the transformer 1 is
Iron core 2 assembled from left and right 2A, 2B, 2C, 2D, and 3A, 3B, 3C,
The coil 4 consists of four blocks of coils 4A, 4B, 4C, and 4D wound two blocks each through a 3D winding frame 3.

Incidentally, in this type of arc welding machine, smaller size and lighter weight are essential requirements, and for this purpose, the coil is wound directly around the iron core. Furthermore, the support for these coils must be sturdy enough to prevent the coil from burning out due to misalignment of the winding frame or loosening of the coil. Therefore, the positioning of the winding frame with respect to the iron core and the ability to stably support the coil on the iron core have been major technical problems to be solved in the past.

[Problem that the invention attempts to solve]

The present invention relates to an arc welding machine, in particular, which is equipped with a transformer that is directly wound around the iron core through a winding frame, and which ensures reliable positioning of the winding frame with respect to the iron core. Our goal is to provide a robust transformer that does not generate

[Means for Solving the Problems] In order to solve the problems of the prior art, the present invention provides an arc welding machine equipped with a transformer in which a coil is directly wound around an iron core through a winding frame. - An iron core having a concave portion on the rear surface and a pair of winding frames each having a convex portion that fits with the concave portions at positions opposite to both concave portions of the core are provided, and the convex portions of the winding frame are fitted into the concave portions of the iron core. The core is supported by a pair of winding frames from the front and rear sides, and is equipped with a transformer with a coil wound around the core.

[Example of idea]

1 and 2 show essential parts of an embodiment of the present invention, and the present invention will be explained in conjunction with FIGS. 5 and 6. As described above, the transformer 1 includes the iron core 2, the winding frame 3, the coil 4, the support 5, and the like. For example, coil 4 is 4A,
Although we have explained that it consists of four blocks, 4B, 4C, and 4D, since each block has the same structure, we will not use the block numbers and simply refer to them as core 2, winding frame 3, and coil 4 for convenience. , the main parts of only one block of the support 5 will be explained.

The iron core 2 is provided with recesses 2a at positions corresponding to the coils 4 on its front and rear surfaces. This may be a through hole from the front side to the rear side. The winding frame 3 is provided with a convex part 3a that fits into both concave parts 2a of the iron core 2, and a groove part 3c in which the coil 4 is wound from a U-shaped part 3b that comes into contact with the iron core 2. It has a shape consisting of a plurality of repellent portions 3d extending apart from each other.

Then, the core 2 is supported by a pair of winding frames 3 from the front and rear surfaces so as to be joined together. At this time, the protrusion 3a of the winding frame 3 is fitted into the recess 2a of the iron core 2, and the winding frame 3 is positioned.

The coil 4 is wound around the groove 3c of the winding frame 3, and the coil 4 is supported by a support 5 between the flexible parts 3d of the winding frame 3, as shown in FIGS. 3 and 4. The inserted coil 4 is pressed and supported. This support 5
is an insulator having a substantially T-shape, and a tapered portion 5c is provided on the inner surface of the T-shaped horizontal bar portion 5a to match the tapered portions 3e on both sides of the flexible portion 3d of the winding frame 3. An engaging portion 5d is carved on one side of the T-shaped vertical bar portion 5b. Then, the engaging portions 5d of the pair of supports 5 are brought into contact with each other, and the supports are engaged with each other by prying, and then installed. Further, as shown in FIG. 4, the tapered portion 5c of the support 5 engages with and supports the tapered portions 3e on both sides of the winding frame 3. Therefore, the support 5 does not come off in any direction and reliably presses and supports the coil 4. Although the explanation of this support 5 has been shown only on one side of the coil 4, it can also be applied to the other side of the coil 4, or to each part such as when a plurality of coils 4 are wound around the winding frame 3. Needless to say.

The present invention has been described above, and the arc welding machine of the present invention supports the coil of a transformer, and in particular ensures the positioning of the winding frame with respect to the iron core. In other words, a recess is provided in the core, a convex part of a winding frame provided at a position opposite to the recess of the core is fitted and supported, and a coil is wound around a pair of winding frames supported on this core. be.

[Effect of idea]

The arc welding machine of the present invention supports the winding frame of the transformer by fitting the convex part into the concave part of the iron core, so that the coil can be wound stably even at the beginning of winding, and the wound coil also remains stable. The winding frame does not shift due to electrical or mechanical vibrations, and it is possible to reliably prevent coil burnout or electric leakage accidents caused by this.

As mentioned above, the arc welding machine of the present invention is lightweight and equipped with a robust transformer among this type of arc welding machine, and has excellent performance and long service life. There are some notable ones.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of essential parts in an embodiment of the present invention. FIG. 2 is a perspective view of the main parts of the present invention.
FIG. 3 is an explanatory perspective view of the support used in the present invention. FIG. 4 is an assembled perspective view of the support used in the present invention. FIG. 5 is an internal side view of this type of arc welding machine. FIG. 6 is a front view of a transformer used in this type of arc welding machine. 1...transformer, 2...iron core, 2a...recess,
3... Winding frame, 3a... Convex portion, 4... Coil, 5...
...Supports.

Claims (1)

[Scope of utility model registration request] In an arc welding machine equipped with a transformer, a trolley on which the transformer is mounted and fixed, a movable iron core for adjusting secondary current, and a cooling fan for forced air cooling, the transformer is located at a position corresponding to each coil. An iron core with recesses on the front and rear surfaces, a protrusion that fits into the recess at a position opposite to the recess of the iron core, a U-shaped portion that comes into contact with the core, a groove for winding the coil, and a U-shaped portion. It consists of a winding frame consisting of a plurality of repellent parts extending across a groove from the core, a support for pressing and supporting the coil, and a pair of winding frames from the front and rear sides of the core, which fit each other's uneven parts. Arc welding characterized in that the coil is wound in the groove of the winding frame, and the coil is pressed and supported by a supporting tool inserted from above between the elastic parts of the winding frame. Machine.