JPS6059827B2 - Pusher of winding insertion device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a winding presser of a winding insertion device that presses and inserts a plurality of layers of windings into a slot of a rotating electric machine core.

Generally speaking, a stator of a rotating electric machine in which two layers of windings are inserted has two slots in a stator core 1, as shown in the perspective view of FIG.
Inside, a first layer of coils 3 located on the outside at the coil end protruding from the end face of the stator core 1 and a second layer of coils 4 located on the inside at the coil end are arranged in two layers. It has been inserted.

In the stator into which the two layers of coils 3 and 4 configured as described above are inserted, the conventional winding insertion device that inserts both layers of coils 3 and 4 in one insertion step is shown in FIGS. 2 to 6.
I got what is shown in the figure.

FIG. 2 is a perspective view of the winding insertion device, and FIG. 3 is a perspective view of a winding presser sliding on the winding insertion device. In the figure, 5 is a fixed base, 6 is a large number of flades that stand upright on this fixed base and arranged in a hollow cylindrical shape, 7'' is a wedge guide provided on the lower outer periphery of this flade, 8 is a hydraulic or pneumatic pressure etc. It is a wire-wound presser connected to the shaft of a cylinder (not shown) operated by a cylinder (not shown), and slides inside the hollow cylinder formed by the flade 6, and has a notch 9 through which the flade 6 touches. A first pressing portion 10 having a large number of slits on the peripheral edge thereof, and cut portions 9 radially extending from the center provided on a pressing surface 13 provided on the upper part of the first pressing portion 10.
It has a plurality of protrusions 11 extending to the inner end thereof, and a second pressing part 12 in which one second layer coil 4 is completely fitted between these protrusions 11.
In order to insert the coils 3 and 4 of both layers using the winding insertion device configured as described above, first, as shown in FIGS. 2 at a position that fits in and touches the pressing surface 13 of the first pressing section 10.
While placing the layered coil 4 over the braid 6,
The first layer coil 3 is placed over the braid 6 at a position in contact with the upper surface of the projection 11 of the second pressing section 12.

Next, insert the blade 6 into the hollow part of the stator core 1, and clamp the upper part of the stator core 1 (as shown).
Then, the presser 8 is raised. In other words, by sliding the coils 3 of both layers toward the stator core 1 to the position shown in FIG.
4 into the slots 2 of the stator core 1, the presser 8 is lowered to complete the insertion of the coils 3, 4 of both layers and the wedge 14 into the slots of the stator core 1. However, with such a conventional winding insertion device, the coils 3 and 4 of both layers can be inserted into the slot 2 of the stator core 1 together with the wedge 14 in one insertion process, but as shown in FIGS. As shown in FIG. 6, the first layer coil 3 is supported on the upper surface of the second pressing section 12, and its both ends are located between the blades 6 at the outer periphery of the first pressing section 10. At the inclined part 16 that touches the tooth part 15 that presses the coil 3, the upper part of the second layer of coil 4, which is inserted by being applied to the first pressing part 10, is pressed against the coil contact points 17 and 18. Coils 3 and 4 are connected to this coil contact point 17 and 18
This causes a force in the right angle direction to oppose the insertion pressure to be applied to the blade 6, which changes the gap between the blades 6, causing a locking phenomenon between the coils 3 and 4 in both layers, which prevents insertion. becomes impossible.

Also, even if inserted. Even if the coil 3 of the first layer is inserted, the tip of the projection 11 of the second pressing part 12 and the blade 6 may cause damage to the coil 6 of the first layer coil 3. There were drawbacks such as the fact that the closest lower coil 19 was often damaged. This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and provides a winding insertion device for press-inserting multi-layer windings into slots of a rotating electric machine core. As a presser, it has a first pressing part and a second pressing part,
The second pressing part is provided with a plurality of protrusions and a coil flip-up part, and the coil that engages with the second pressing part touches the first pressing part around the tooth part formed between the blades.
By also providing a third pressing part that is higher than the pressing part of the first layer and lower than the second pressing part and forming a wall surface of the coil that engages with the first pressing part, the coil of the first layer and the second layer can be connected to each other. To provide a presser element for a winding insertion device which can contribute to mass production by enabling the coils to be inserted simultaneously in a single insertion process in a stable state in which the coils do not come into abnormal contact with each other during insertion, and by contributing to mass production. The purpose is to An embodiment of the present invention will be described below with reference to FIGS. 7 to 11.

In the figures, the same reference numerals indicate the same parts as in FIGS. 1 to 6, and 20 indicates the protrusion 11 of the second pressing part 12.
The blade 6 on the outside of the circumference connecting the innermost ends of the notches 9 of the first pressing section 10 is a flip-up section provided at the tip of the
It protrudes into the gap between. Reference numeral 21 denotes a U-groove formed between the raised portions 20, which is continuous with the side surface of the cut portion 9 of the first pressing portion 10, and is in contact with the inner surface of the blade 6.

Note that the U-groove 21 may be changed in shape as appropriate, such as a V-groove or a mouth groove. Reference numeral 22 denotes a toothed portion of the first pressing portion 10 with which the second layer coil 4 engages when inserted.

23 is a third portion provided between the protrusions 11 and apart from these portions.
This pressing part has a height intermediate between the first pressing part 10 and the second pressing part 12, and the height can be arbitrarily determined depending on the amount of coil. A low first pressing portion 10 forms a trough between the two pressing portions 12 .

The wall surface 24 formed between the third pressing section 23 and the first pressing section 10 serves as a substitute for the insertion resistance generated between the blades 6 when inserting the second layer coil 4 into the blades 6. It is designed so that it can be received easily. 25 is a pressing surface of the third pressing portion 23 which receives the first layer coil 3, and 26 is a tooth portion that assists this pressing surface.

The winding insertion device having the presser configured as described above inserts the first and second layers of the winding pattern as shown in FIG.
To insert the coils 3 and 4 of the second layer, please refer to Fig. 9 and Fig. 1.
As shown in Figure 0, the second layer coil 4 is pressed against the second pressing part 1.
2 and the third pressing part 23, and then the first layer coil 3 is applied to the second pressing part 1.
The protrusions of the stator core 1 are placed in the center and placed over the blades 6 so as to extend over the third pressing parts 23 on both sides, and the inner diameter of the stator core 1 is inserted into the outer periphery of the blade 6.
Blade (not shown) both upper ends of the presser 8.
Slide the coils 3 and 4 of both layers up to the position shown in Figure 1.
are simultaneously inserted into slots 2 of stator core 1,
The pusher 8 is lowered to complete the insertion of both layers of coils 3 and 4 into the slots 2 of the stator core 1.

In the presser of the winding insertion device of the above embodiment, the upper end of the tooth portion 26 of the third pressing portion 23 is higher than the upper end of the tooth portion 22 of the first pressing portion 10 and lower than the second pressing portion 12. The coils 4 in the second layer are at almost the same height as the coils 4 in the second layer.
It is completely housed in the first pressing part 10, which is a valley formed between the pressing part 12 and the third pressing part 23, and is hung on the second pressing part 12 and the third pressing part 23. It does not come into contact with the first layer coil 3, or even if it does come into contact, no pressing force is generated as in the conventional case.

When the pusher 8 moves up and inserts the first layer coil 3, the first layer coil 3 is pressed by the second pusher 12 and the third presser 23, Since no pressing force is generated between the coils 3 and 4 of the second layer, the coils 3 and 4 of both layers are inserted smoothly and stably without causing the locking phenomenon and damage as in the conventional case. Furthermore, in the pusher of the winding insertion device described above, not only can the coils 3 and 4 of both layers be inserted into the slot 2 of the stator core 1 in one insertion process, but also the coils 3 and 4 at both ends can be inserted into the slot 2 of the stator core 1 in one insertion process.
, 4, the second layer coil 4 is protected by the third pressing part 23 and is not subjected to the insertion pressure of the first layer coil 3 on the first pressing part 10. Furthermore, since most of the insertion resistance of the blade 6 is received by the wall surface 24 of the third pressing portion 23, even when the space factor of the coil in the slot 2 is very high, the coil can be easily inserted.

Further, the first layer coil 3 is protected by the coil flip-up part 20, and the protrusion part 11 of the second pressing part 12 and the blade 6
Because the blade 6 comes off from the upper tip without being damaged by the
There is no possibility that a part of the coil 3 of the first layer 3 is bitten between the inner surface of the tip and the protrusion 11 of the second pressing part 12, and the coils of both layers are smoothly and stably removed. 3,4
can be inserted into the slot 2 of the stator core 1. As shown in FIG. 10, when the pressing surface 13 of the first pressing section 10 is, for example, a flat surface, the height H is the distance from this surface to the upper end of the coil flip-up section 20 of the second pressing section 12. Letting the height h be the height up to the upper surface of the pressing portion 23, the best condition is to set it in the range of 0 h≦H.

The above embodiment is a 3-phase motor in which the first layer of coils 3 are arranged in two stages with a pitch of 1200 in a stator core 1 with 24 slots.
Similarly, the coil 4 of the layer has two stages of 120 pi pitch, and the coils 3 and 4 of both layers are opposite to each other. ．． V
．． ．． Although we have shown an example in which W is formed to form four poles, the second
The position, height, number and shape of the coil flip-up parts 15 of the pressing part 12, or the position, height, of the third pressing part 23,
It goes without saying that by setting the number and shape in accordance with the second pressing portion 12 and changing each, it is possible to apply the present invention to any number of phases, poles, slots, coil stages, and coils.

Further, the presser 8 has a first presser 10 and a second presser 12.
and the third pressing portion 23 may be manufactured separately and joined together, or the pressing portions 10 and 1 of these three
2 and 23 may be manufactured as one piece.

As described above, the present invention has a winding insertion device that presses and inserts a multi-layer winding into a slot of a rotating electric machine core, in which a pusher is formed by a first pushing part, a second pushing part, and a third pushing part. A coil flip-up part is provided at the tip of the protrusion of the second pressing part to protrude into the gap between the blades, and the third pressing part allows the second layer of coils to directly receive the insertion pressure from the first layer of coils. At the same time, the insertion resistance of the second layer coil is received by the inner wall surface of this third pressing part, so when inserting the coil into the slot of the iron core and when lowering the presser after insertion. In either case, the multilayer coils can be inserted simultaneously in one insertion process without causing any damage to the coils, and by simply replacing the pusher. It can be applied to any conventional jig and can provide great benefits with a low investment.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a main part of a stator having two layers of coils, and FIGS. 2 to 6 are diagrams for explaining a conventional winding insertion device. 3 is a perspective view showing the pusher 8, FIG. 4 is a plan view when the coil is set in the winding insertion device, and FIG. 5 is a perspective view of the pusher 8 of the winding insertion device. Sectional view of the main part when raised to 6th
The figure is a sectional view of the main part when the presser 8 of the winding insertion device is raised to the uppermost end, and FIGS. 7 to 11 are diagrams for explaining one embodiment of the present invention. 7 is a perspective view of the pusher 8, FIG. 8 is a schematic diagram showing the winding pattern, FIG. 9 is a plan view when the coil is set in the winding insertion device, and FIG.
The figure is a sectional view of the main part when the pusher 8 of the winding insertion device is raised halfway, and FIG. 11 is a sectional view of the main part when the pusher 8 of the winding insertion device is raised to the uppermost end. . In the figure, 1 is a stator core, 2 is a slot, 3 is a first-layer coil, 4 is a second-layer coil, 6 is a blade, 8 is a pusher, 10 is a first pusher, and 11 is a protrusion. , 12 is a second pressing part, 17 and 18 are coil contact points, 19 is a lower coil, 20 is a flip-up part, 23 is a third pressing part, and 24 is a wall surface.

Claims (1)

[Scope of Claims] 1. In a pusher of a winding insertion device that slides inside a hollow cylinder formed by a large number of blades and presses and inserts a multilayer winding into a slot of a rotating electric machine core, a first pressing part having a large number of notches through which the blades are inserted; and a first pressing part provided higher than the pressing surface of the first pressing part, into which one winding is completely fitted radially from the center of the first pressing part. a second pressing portion having a plurality of protrusions formed at such intervals and a coil flip-up portion provided at the tip of each of the protrusions and protruding into the gap between the blades;
The upper end of the tooth part which is provided apart from this second pressing part and holds the winding that engages with this second pressing part between the blades is higher than the upper end of the tooth part of the first pressing part, and A presser for a winding insertion device, characterized in that it includes a third presser whose height is lower than or substantially the same as that of the presser. 2. Claim 1, characterized in that the wall surface of the third pressing portion facing the second pressing portion is adapted to receive insertion resistance of the winding to be inserted by the first pressing portion. A presser of the winding insertion device described. 3. The winding that is inserted while engaging with the first pressing part is subjected to abnormal pressure from above during insertion by the winding that is inserted while engaging with the second pressing part and the third pressing part. 3. The presser element of the winding insertion device according to claim 1 or 2, wherein the presser element is adapted to be inserted without being inserted.