JPH0435009Y2 - - Google Patents

Description

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

[Prior Art] Generally, this type of arc welding machine, as shown in FIG. A fixed trolley 6, a movable iron core 7 for adjusting the secondary current, a handle 8 for adjusting the current connected thereto, a cooling fan 9 for forced air cooling, an electric shock prevention device 10, a switch 11, a fuse 12, etc. It consists of electrical parts. 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, 3 on top and bottom 2A, 2B iron core 2
The coil 4 consists of four blocks of coils 4A, 4B, 4C, and 4D wound two blocks each through a winding frame 3 consisting of B, 3C, and 3D.

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 coils from becoming burnt out due to loosening of the coils.
Therefore, the ability to reliably support the coil between the winding frames has been a major technical problem to be solved in the past.

[Problems to be solved by the invention] This invention is an arc welding machine that is equipped with a transformer in which a coil is directly wound around an iron core through a winding frame.
The coil of this transformer is securely supported between the winding frames,
The objective is to provide a robust transformer that does not cause burnout or electric leakage accidents due to loose coils.

[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. , a winding frame of the reel part and a substantially T-shaped support having a tapered part on the inner surface of the horizontal bar part and an engaging part on one side of the vertical bar part are provided, and the opposite reel of the reel part The pair of supports are brought into contact with their meshing parts between the shaped parts, and the tapered parts of the opposing winding frames are engaged with the tapered parts of the supports, and the supports are inserted between the winding frames. Press the coil with a pair of supports,
It is equipped with a supported transformer.

[Embodiment of the invention] FIGS. 1 and 2 show essential parts of an embodiment of the invention, and the invention will be explained with reference to 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, the coil 4 is 4A,
It was also explained that it consists of four blocks, 4B, 4C, and 4D, but since each block has the same structure, the block numbers will not be used.
For convenience, the main parts of only one block will be explained by simply referring to the core 2, the winding frame 3, the coil 4, and the support 5.

The coil 4 is wound around the groove 3c of the winding frame 3,
To support this coil c, as shown in FIGS. 1 and 2, a support 5 is inserted between the repellent portions 3d of the winding frame 3 to press and support the coil 4. This support 5 is
It is an insulator having a substantially T-shape, and has a tapered part 5c on the inner surface of the T-shaped horizontal bar part 5a, which matches the tapered part 3e provided on both sides of the repellent part 3d of the winding frame 3.
is provided, and an engaging portion 5d is carved on one side of the T-shaped vertical bar portion 5b. And a pair of supports 5
The engaging portions 5d of the connectors are brought into contact with each other, and the connectors are inserted by being engaged with each other by prying them. Further, as shown in FIG. 2, the tapered portion 5c of the support 5 engages with the tapered portions 3e on both sides of the winding frame 3 to support it. Therefore, the support 5 will not come off in any direction.
The coil 4 is reliably pressed and supported. Although the explanation of this support 5 has been shown for only one side of the coil 4, the explanation 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.

Further, the coil 4 is wound in the groove 3c of the winding frame 3, and the winding frame 3 has its convex portion 3a fitted into the concave portion 2a of the iron core 2, as shown in FIGS. 3 and 4. I will explain this in detail.

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 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 present invention has been described above, but the main part of the arc welding machine of the present invention is to support the coil of the transformer. The coil is pressed and supported by a pair of supports that engage with this tapered portion and mesh with each other at their meshing portions.

[Effects of the invention] The arc welding machine of the invention supports the coil of the transformer between the reel parts of the winding frame having tapered parts on both sides, and engages with each of the tapered parts. Since the coil is pressed and supported by a pair of supports that engage with each other, the supports do not come off in any direction and can reliably support the coil. Therefore, it is possible to reliably prevent a burnout accident or an electric leakage accident of the coil due to the loosening of the coil.

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

[Brief explanation of drawings]

FIG. 1 is an explanatory perspective view of main 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 a sectional view showing the correlation between the core and the winding frame used in the present invention. FIG. 4 is an explanatory perspective view of the core and winding frame 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, 3...Reel frame, 4
...Coil, 5...Support.

Claims (1)

[Scope of utility model registration request] In an arc welding machine equipped with at least a transformer, a trolley on which the transformer is mounted and fixed, a movable core for adjusting secondary current, and a cooling fan for forced air cooling, the transformer is attached to the core through a winding frame. The coil is directly wound, and the winding frame has a tapered part on the inner surface of the repellent part and the horizontal bar part, and a mating part is provided on one side of the vertical bar part, so that it has an approximately T-shape. a pair of supports are provided between opposing repellent portions of the winding frame, and their meshing portions are brought into contact with each other, and each taper of the opposing winding frame and a tapered portion of the support are provided. An arc welding machine characterized by having a transformer that presses and supports a coil with a pair of supports that are engaged with each other and that are inserted between the winding frames.