JP3294637B2 - Winding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing a rotating electric machine such as a motor, and more particularly to a winding apparatus for forming a coil to be inserted into a stator core.

[0002]

2. Description of the Related Art FIGS. 5 and 6 show such a winding device.
Are generally known. This configuration is disclosed in, for example, Japanese Patent Application Laid-Open No. 58-195451. 5 and 6, reference numerals 1 and 2 denote winding frames, which are fixed to the winding frame bases 3 and 3a by bolts, respectively. The winding frames 1 and 2 are provided with a stepped tapered winding surface on the outer periphery except for the facing surfaces, and a fryer (not shown) is turned around the pair of winding frames 1 and 2 to form a stepped shape. An electric wire is wound around the winding surface to form a coil.

The bobbin base 3 is configured to be slidable in the near and far directions with respect to the bobbin base 3a, whereby the distance between the bobbin frames is adjusted to obtain a desired coil circumference. . Since the thickness of the stator core changes according to the output of a motor or the like into which the coil is inserted, the circumferential length of the coil is adjusted mainly in accordance with the change in the thickness. On the other hand, the stepwise winding surfaces of the winding frames 1 and 2 are mainly set in accordance with the shape of the coil end projecting from the stator core, and the outermost step in FIG. A large coil group is formed by winding, and a coil group having a small pitch is formed by winding in order toward the inner peripheral step. The step on the winding surface in FIG. 6 is such that the step at the top and bottom of the drawing corresponds to the difference in the crossover pitch, and the step at the left and right
Reference numerals 0 and 11 denote coil end portions in order to overlap and align the coil end portions. In this way, the step of the winding surface is adjusted so that a plurality of coil groups having different crossover pitches are aligned without interfering with each other at the coil end portions. , And the ratio is set according to the coil end length and the shaping shape.

[0004] The coil wound around the winding frames 1 and 2 is scraped downward by a coil pressing member, and falls onto a coil receiving jig (not shown) or a blade of a coil inserter. The coil pushing member includes a rod-shaped rod 4 and a thin plate-shaped flag 5 fixed to the rod 4. Each of the winding frames 1 and 2 is provided with a notch groove 6 cut into a winding surface and penetrating in the up-down direction, so that the flag 5 is received therein. The rod 4 reciprocates up and down in synchronism with the rotation of the fryer, whereby the flag 5 reciprocates up and down in the cut groove 6 and sequentially scrapes the coils formed on the winding frames 1 and 2 downward. It is designed to drop.

[0005]

For example, in a motor, a motor with a characteristically higher efficiency can be obtained by increasing the amount of coils (wire occupation ratio in the iron core slot) inserted into the stator core. On the other hand, the usage of electric wires increases, resulting in a cost-up specification. Normally, motor specifications are determined based on a balance between required motor characteristics and cost, so that the amount of coils inevitably varies depending on the model.

When the coil amount is increased, FIGS.
Since the amount of electric wire wound around each step of the stepwise winding surfaces of the winding frames 1 and 2 in the winding device shown in (1) increases, the coil ends of a plurality of coil groups having different crossover pitches are aligned accordingly. Extra space is needed to make it work. However, since the absolute value of the step on the winding surfaces of the winding frames 1 and 2 is invariable, the step 1 in the left-right direction in FIG.
Since 0 and 11 are insufficient, the coil groups at the coil end are not aligned with each other. As a result, when shaping the coil end, the coil groups interfere with each other to cause damage to the electric wire, or the outer coil inserted into the stator core first blocks the approach path of the inner coil to be inserted later, and the electric wire is damaged. This may result in scratches or poor insertion resulting in incomplete insertion.

As one method for preventing this problem, the distance between the winding frame 1 and the winding frame 2 is increased to make the entire coil circumference longer so that the overall coil end length is made larger. There is a way. In this case, although the above-described insertion failure is unlikely to occur, since the absolute values of the steps 10 and 11 of the winding surfaces of the winding frames 1 and 2 are unchanged as described above, the coil groups are not aligned with each other as usual. That is, if the coil group having the largest transition pitch is set to an appropriate circumference, the coil end of the coil group having the smallest transition pitch becomes too large, and conversely, the coil group having the smallest transition pitch is set to an appropriate circumference. If set, the coil ends of the coil group having the largest cross pitch will be too small. If the coil end is too large, it is wasteful in material, and the electric resistance of the coil increases to increase copper loss, thereby deteriorating the motor efficiency. On the other hand, if the coil end is too small, the coil end is stretched and the wire is frequently damaged. Furthermore, because the coil groups do not align with each other,
There are problems such as the coil end becoming too large to obtain a desired shaped shape, and the electric wire being easily damaged by interference between the coil groups at the time of shaping.

[0008]

SUMMARY OF THE INVENTION According to the present invention, the winding is provided by winding a wire having a stepped winding surface in pairs and winding an electric wire around the outer circumference of the pair of winding frames. In a winding device configured to form a coil having a different circumferential length according to a step of a surface, the winding surface is configured by a plurality of winding frame pieces divided for each step, and each of the winding frame pieces forms a pair. Are configured to be slidably fixed in the perspective direction with respect to the reel.

[0009]

[Function] Since each winding frame piece can be independently slid and fixed , the level difference of the winding surface can be set to an appropriate value for each coil group, and the coil end of each coil group is impossible regardless of the coil amount. Align without waste.

[0010]

PREFERRED EMBODIMENTS FIG. 1 and FIG. 2 shows the essential parts of the winding device according to the present invention, a pair of winding frame facing the slide solid
2 shows the reel 1 attached to the reel base 3 which can be set. In the figure, reference numeral 7 denotes a bobbin mounting plate fixed to the bobbin base 3 by bolts or the like. The bobbin mounting plate 7 is tapered along the step of the bobbin 1 so as not to protrude from the stepwise winding surface of the bobbin 1. It is formed so as to be tapered stepwise.

The stepwise winding surface of the winding frame 1 is formed by stacking winding frame pieces 1a, 1b, 1c, 1d, 1e divided for each step, and these winding frame pieces 1a to 1e are It is fixed to the bobbin mounting plate 7 by bolts 9 via spacers 8 as shown by a partial cross section. Since each of the reel pieces 1a to 1e is independently slidable by adjusting the thickness of each of the spacers 8, a desired step 10 can be formed in the horizontal direction of the respective reel pieces.

Reference numeral 6a denotes a notch groove formed by cutting in parallel with the direction in which the reel pieces 1a to 1e can be slid and fixed. By forming in this manner, the reel pieces 1a to 1e are formed.
Regardless of the slide, a groove communicating vertically can always be formed. The flag 5 fixed to the rod 4 is housed in the two cut grooves 6a, and reciprocates up and down.
The coil formed in e is scraped down sequentially. Since the direction in which the reel pieces 1a to 1e can be slid and fixed is in the perspective direction with respect to the other reel forming a pair with the reel 1, the step 11 of the other reel 2 described with reference to FIG. Since the change can also be slid, generally, one of the paired winding frames may be configured by a winding frame piece that can be slidably fixed .

In the winding device shown in FIGS. 1 and 2,
The step 10 of each of the winding frame pieces 1a to 1e can be adjusted according to the increase or decrease of the coil amount due to the change of the motor specification, and a desired circumference can be obtained for each coil group having a different transition pitch. As a result, the space for aligning the coil ends of each coil group can always be set to an optimal amount, there is no waste of material, copper loss is reduced, and interference between the coil groups and the electric wires caused by the coil ends being stretched No scratches occur, and the shaped shape can be made compact.

FIGS. 3 and 4 show another embodiment of the present invention. This is because, in the embodiment shown in FIGS. 1 and 2, the winding frame 1 having five stages of the winding frame pieces 1 a to 1 e has been replaced with a six-stage winding frame pieces 1 f, 1g,
1h, 1i, 1j, and 1k. The reel piece 1k is fixed to the reel mounting plate 7a by bolts 9 via spacers 8, and this reel piece 1k
Is characterized in that the cross pitch is very small. In order to scrape off the electric wire wound around the winding frame piece 1k, it is necessary to reduce the width of the two cut grooves 6a. An electric wire wound around a frame piece forming a large coil group is difficult to drop.
When a new flag 5 is to be provided in the center,
There is no space for the new rod 4 in the reel base 3, and even if one flag 5 is added,
Since the width of the flag is originally narrow, there is a shortcoming that the area for pushing the electric wire is insufficient and the entire electric wire does not fall well.

Therefore, in the embodiment shown in FIGS. 3 and 4, a rod-shaped rod 12 is passed through each of the winding frame pieces 1f to 1k, and this rod 12 is reciprocated up and down similarly to the other rods 4. Only the electric wire wound around the winding frame piece 1k is directly scraped off by the tip of the rod 12. In the figure, reference numeral 13 denotes a hole provided in the winding frame pieces 1f, 1g for penetrating the rod 12, and reference numeral 14 denotes a cutout provided in the winding frame pieces 1h, 1i, 1j, 1k for the same purpose. The hole 13 and the notch 14 are configured to always provide a space for the rod 12 to pass through regardless of the sliding of the respective winding frame pieces 1f to 1k. Since the distal end of the rod 12 is a flat part having a certain area, the electric wire wound around the winding frame piece 1k is
And it can be easily scraped off from the reel piece 1k.

[0016]

According to the present invention, the step on the winding surface of the winding frame can be set to an appropriate value for each coil group. The coil groups are aligned without causing any trouble, and as a result, the coil ends can be easily shaped to obtain a compact shape, and the occurrence of wire damage is prevented, the quality is improved, and the amount of copper is reduced. Cost reduction and improvement of electrical characteristics are achieved.

Further, in the winding device of the present invention, when it is desired to change only a part of the shape of the bobbin due to the shaping shape of the coil end or a change in the winding specification, a portion requiring a shape change is required. It is only necessary to replace the reel pieces, and the cost associated with changing the mold can be reduced.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional front view of a main part of a winding device showing an embodiment of the present invention.

FIG. 2 is a bottom view of a main part of the winding device shown in FIG. 1;

FIG. 3 is a front view of a main part of a winding device showing another embodiment of the present invention.

FIG. 4 is a bottom view of a main part of the winding device shown in FIG. 3;

FIG. 5 is a front view of a conventional winding device.

FIG. 6 is a bottom view of the bobbin shown in FIG. 5;

[Explanation of symbols]

 1, 2 Reel 1a to 1k Reel 4,12 Rod 5 Flag 6,6a Notch 7,7a Reel attachment plate 8 Spacer

Claims (3)

(57) [Claims] 1. A pair of winding frames having a stepwise winding surface are opposed to each other, and an electric wire is wound around an outer periphery of the paired winding frames, whereby a circumferential length is set according to a step of the winding surface. In the winding device that forms a different coil, the winding surface is constituted by a plurality of reel pieces divided for each step, each of the reel pieces in the perspective direction with respect to the other of the pair of reels Can be fixed by slide
Winding apparatus characterized by being configured to. 2. A wound surface provided with notches, in which and a member pressing the coil scrape reciprocates in the groove cut said wire is wound, said coil
The winding device according to claim 1 , wherein the pressing member is provided vertically in a plane of the bobbin piece, and is provided parallel to a direction in which the bobbin piece can be slidably fixed . 3. A rod-shaped member penetrates through each of the winding frame pieces, and an electric wire wound around the winding frame piece mounted inside the coil pressing member is scraped off by a tip of the rod-shaped member. Item 3. The winding device according to Item 2.