JPS5883558A - Coil inserting machine - Google Patents

Abstract

PURPOSE:To prevent the slots of a stator core from being blocked by a projection for guiding the vicinity of the end of a coil to become the inserting direction side of wedge by reducing the size of the projection smaller than that at the other position. CONSTITUTION:A pair of right and left guide projections 15, 15 projected laterally are respectively provided at the cutside end of a wedge guide 11. The projections 15, 15 are formed except the vicinity of the end of a coil to become the inserting direction side of the wedge in a wedge guide 11. In this case, the size of the length of the part except the projections 15, 15 is set smaller than the length size of the wedge. With this structure, the projections 15, 15 are not provided at the position in the vicinity of the end of the wedge guide 11, and the interior of the slot 13 of a stator core 12 is locally blocked by the wedge guide.

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a coil insertion machine for inserting coils and wedges into slots of a stator core of an electric motor, for example.

Technical Background of the Invention Figure M1 shows the schematic configuration of a coil insertion machine.
This is a stritz arm that is driven back and forth by an appropriate drive source. In this strip, there are multiple blades 2 around Δ1...
・is provided. The blades 2 are arranged so as to face a portion 5 between the slots 4 formed in the stator core 3 from inside. In addition, wedge guides 6 are disposed on the outside of each of these blades 2, respectively. When inserting the coil, the coil 2 to be inserted is installed in the gap between the appropriate plates 2, 2, and in this state, by inserting the stritz arm 1 into the stator core 3, the coil 7 is inserted into the stator;
The wedge is inserted into the slot 4 of the slot 4, and at the same time is guided by a suitable wedge kite 6 so that the wedge is also inserted into the slot 4.
It is designed to be inserted into.

By the way, FIGS. 2(1) to 2(e) show a conventional shaft guide 6. As shown in FIG. This wedge guide 6 is disposed parallel to the reciprocating direction of the strip 4'l, and has a pair of left and right guide protrusions 8, 8 formed at its outer end. As shown in FIG. 3, when the stator core 3 is set in the coil insertion machine, these protrusions 8, 8 protrude to positions facing the inside of the slots 4, respectively.

Problems with the Background Art In the conventional structure described above, when the coil is inserted, as shown in FIG.
As shown in the figure, a wedge kite 6 is attached to the bottom surface of the stator core 3.
When the tips of the wedge guides are brought close to each other, the inside of the slot 4 of the stator core 3 is partially blocked by the protrusions 8, 8 of the wedge guide 6, as shown in FIG. In this case, it is difficult to insert the coil i into the slot 4, and it is difficult to manufacture a stator in which the coil 1 in the slot 4 has a high space factor. Furthermore, when inserting the coil, the coil 7 gets caught on the protrusions 8, 8 at the tip of the thread guide 6, increasing the insertion resistance, so the driving force of the Stritz/41 must be increased. If the coil 1 is inserted with a strong force, the coil 1, the slot insulating paper, etc. may be damaged.

Therefore, there was a problem in that it was not possible to stabilize the quality of the stator.

Purpose of the Invention This invention was made based on the above circumstances, and its purpose is to provide a slot d! of a stator core. There is less risk of the coil being blocked by the protrusions of the wedge guide, making it possible to manufacture a coil with a higher space factor in the slot, and reducing the coil insertion force.
Plan.

Furthermore, it is an object of the present invention to provide a coil insertion machine that can prevent damage to coils, etc. and stabilize quality.

Summary of the Invention At least by making the protrusion dimension of the protrusion near the tip on the insertion direction side of the coil and wedge smaller than the other parts of the protrusion O, the slot of the stator core can be shaped like a wedge. This prevents local blockage by the protrusion at the tip of the guide.

Embodiment of the invention FIGS. 5(a) to 8(e) to 8 show a further embodiment of the invention. FIGS. 5(a) to 5(e) show the Tsuzy guide 1. The inner end of this z-edge guide 11 is formed into a substantially T-shape in accordance with the tip of the tooth portion 14 between each slot, )JJ, and 13 formed in the stator core 12. Furthermore, a pair of left and right guide protrusions 15, 15 that protrude laterally are provided at the outer end of the wedge guide 11, respectively. These O protrusions x, i, and 15 are formed except for the vicinity of the tip of the wedge kite 11 on the side in which the coil and wedge are inserted.

In this case, the length of the portion excluding the projections 15 and 15f is set to be smaller than the length of the wedge.

Therefore, in the structure described above, there is a protrusion IS in the vicinity of the tip of the wedge guide I.

15 is not provided, so when the tip of the wedge guide 11 approaches the bottom surface of the stator core 12 when inserting the coil, the slot 13 of the stator core 12
The inside of the wedge is not locally blocked by the wedge guy Y7i J.

Therefore, even if there are a large number of coils, the coils can be inserted into the slots 13 more easily than in the past, and a stator with a high space factor (80 inches or more) can be manufactured. Furthermore, the coil does not get caught when inserted, and the coil insertion resistance is smaller than before, so the driving force of the strip mother can be reduced to 11\
In addition to being able to reduce the thickness of the stencil, damage to the coil, slot insulating paper, etc. can be prevented, and the quality of the stenitor can be stabilized. Furthermore, since the wedge guide 11 is provided with protrusions 15, 15 in areas other than the vicinity of the tip,
There is also no fear that it will become impossible to insert the wedge.

Note that this invention is not limited to the above-mentioned examples. For example, as shown in FIG. 9, the protrusions 15, 15 of the wedge guide 11 may have a structure in which the protrusion size 13 near the tip is smaller than the protrusion size 71 at other parts.

Furthermore, it goes without saying that various modifications can be made without departing from the spirit of the invention.

As described in the detailed description of the invention, this invention is based on at least the protrusion size of the guide protrusion near the tip of the wedge guide on the side in the insertion direction of the coil and wedge compared to other parts of the protrusion. Since it is small, it is possible to reduce the possibility that the slot of the stator core will be blocked by the protrusion at the tip of the wedge guide. Therefore.

It is possible to manufacture a stator that accommodates the space factor of the coil in the slot, reduces the force for inserting the coil, and prevents damage to the coil, etc.
It is also possible to stabilize the quality of the stator.

[Brief explanation of drawings]

Figures 1 to WJ4 (a) monovalent) show the conventional example, Figure t141 is a front view showing the overall schematic configuration with a partial cross section, and Figure 2 (IL) is the ditch surface showing the wedge guide. figure,
The same figure (b) a is the same side view, the same figure (c) is the same side view, the third
Horizontal 1 diagram showing the positional relationship between the slot and wedge guide
Figure 4 (&) is a side view for explaining the insertion of the coil, Figure (b) is a cross-sectional view of the same, Figures 5 (a) to (c).
) to FIG. 8 show one embodiment of the present invention, and FIG.
Figure (a) is a plan view showing the wedge guide, figure (b)
The same side view of the ore, Figure (e) is the front view of the mine, Figure 6 is the same as Figure 5 (
■-■ Gland cross-sectional view in b), prisoner 7 is shown in Figure 5(b) ■-■
Gland cross-sectional view, Figure 8 shows slot 11...wedge guide, 1
2... Stator core 13... S1: l, ), 75.
・Protrusion. Figure 1 Figure 3 (b) (c) Figure 4

Claims (1)

[Claims] A plurality of blades are disposed around the stritz arm, and the wedge guides are arranged opposite to each other on the outside of each of the blades, and each of the wedge guides has a guide for protruding into a position corresponding to the slot of the stator core at the outer end. By inserting the stritz arm into the stator core, a coil mounted between appropriate blades is inserted into the slot and guided by the protrusion of the wedge guide. the wedge is inserted into the slot; in the coil insertion machine, the protrusion size of the protrusion near the tip of the wedge guide on the insertion direction side of the coil and wedge is compared with protrusions in other parts; A coil insertion machine that makes it smaller than t-% mold.