JPS59230439A - Stator core of motor and winding method therefor - Google Patents

Abstract

PURPOSE:To enable to effectively and rigidly hold the end of split cores by forming projections projected from one outer periphery of the cores in radial outside and split outside and recesses. CONSTITUTION:Projections 10 are projected from one outer periphery of split surfaces 9 of split cores 1 in radial outside and split outside, and recesses 13 are formed at corners 12 crossed between the split surfaces 9 and the bottoms 11 of the projections 10. When winding, the split surfaces 9 of the cores 1, the bottoms 11 of the projections and chucks 3b contacted with the side faces 14 of the projections are set, other chuck pieces 3C are then pressed by the tension of a spring or the like on the other oblique surfaces 15 of the projections, and held by wedge effect. Since the recesses 13 which are not applied to the corner 12 are formed on the split surface sides, the chuck pieces 3C can be pressed to the full width (l) of the bottom, can effectively endure against the tension at the winding time and hold the cores 1.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is directed to dividing an iron core into a plurality of parts, and winding electric wires so as to be orthogonal to the yoke of each slot (so-called Troigle winding).
The present invention relates to a stator for an electric motor, which is suitable for winding, and a method for winding the core.

Conventional configurations and their problems In recent years, there has been a strong demand for electric motors to be smaller and lighter, as well as thinner. Thin electric motors are attracting attention because they have toroidal windings perpendicular to the coil end to significantly shorten the height of the coil end, as well as to save materials and improve efficiency. In general, the yoke section of a ring-shaped core A toroidal winding machine is known for applying toroidal winding to a wire, but this winding machine sets the wire storage ring so as to intersect with the annular body to be wound, and then
One phase of the required wire is wound around the wire storage ring, and then the storage ring is reversed, and the wire is wound around the body while spitting out the stored wire, but the work efficiency is extremely poor. Since the winding speed is low, it is not passed through the windings of rotating electrical machines such as electric motors, which require multiple windings.

Therefore, as an alternative to toroidal winding, as disclosed in Japanese Patent Application Laid-Open No. 5'6-139062, etc., it is possible to divide the core, which is the body to be wound, and apply flyer winding to the slot m of each divided core. Proposal No'1. I'm here.

According to this method, apart from joining the split cores, toroidal winding, which was difficult in the past, can be done easily and at cylinder speed, which is useful.A conventional example of toroidal winding on a 0-segment core. An example will be explained with reference to the drawings.

FIG. 1 is a diagram showing a state in which the ends of the core are held in a conventional split core and a toroidal winding is applied within the slot using a flyer. In Figure 1, 1 is a split core.

2Q, the teeth at the split end, 3 the chuck that holds the iron r01, 4 the yoke, 5 the flyer, 6 the electric wire, 7 the wire kite, 8 the tooth tip, S+, S2
Hereinafter, the operation of a conventional example configured such that 0 is a slot and 0 is a center portion of an iron core will be described.

First, the teeth 2f of the split ends of the split core 1 are clamped by the chuck 3. Then, the flyer 5 is wound around the yoke part 4 of the slot S+, and the electric wire 6 is wound around the iron core 1 together with the chuck 3 while rotating and swinging it as shown by the arrow A around the center 0 of the iron core 1. In order to prevent the wire 6 from coming into contact with the tooth tip 8 and breaking when it passes through the slot opening, a winding guide 7 is provided outside the orbit of the wire 6 ○ The winding of the slot S1 is completed. Then, when moving to the winding of slot R2, rotate the iron core 1 with its center 0 as the rotation center
However, since the tip of the chuck 3 protrudes inward from the inner diameter of the core, it collides with the winding guide 7, making it impossible to rotate and position the split core 1 and the chuck 3. No, usually winding guide 7
is removed at this point, and if the slot to be wound is the slot closest to the dividing surface, the tip of the chuck 3 is kept sharp and the chuck 3 is used also as a guide to wind the wire in that slot. Furthermore, if the slot to be wound is not the slot closest to the dividing surface, the above-mentioned combination cannot be achieved, so a separate smaller guide 7 is replaced and winding is continued, and the last slot is wound using the above-described method.

However, in the above configuration, since the teeth 2 at the split end are only held by the chuck 3, the holding strength of the split core 1 is weak and the winding tension of the electric wire 6 is high. This method has disadvantages in that it cannot withstand high-speed winding, and when winding the wire in the slot S2 near the dividing part, it is necessary to remove one wire guide 7, resulting in poor winding workability.

OBJECTS OF THE INVENTION In view of the above drawbacks, the present invention provides a stator core and a winding method for an electric motor, which can securely and firmly hold the ends of the split core, and can also be used to create windings that do not require the attachment and detachment of wire guides. It is.

Structure of the Invention In order to achieve this object, the stator core of the electric motor of the present invention is configured by providing a protrusion and a recess that protrude outward in the radial direction (Ill and outside of the split surface) on one outer periphery of the split core. With this configuration, it is possible to support the dividing surface, the bottom surface of the projection, and the side surface of the projection facing the dividing surface, and to firmly hold the side surface of the projection opposite to the dividing surface by the chuck,
Furthermore, electric wires can be toroidally wound in all slots using one wire guide.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 shows a split iron core according to an embodiment of the present invention. Slots are omitted for simplicity.

In FIG. 2, 1 is a split core, 9 is a split surface, 10 is a protrusion that protrudes radially outward and outward from the split surface on one of the outer peripheries of the split surface 9, 11 is a bottom surface of the protrusion 1o, and 12 is a split surface 9
and the corner where the bottom surface 11 of the protrusion 1o intersect, a recessed portion is provided at the 13id corner 12, 14 is a side surface of the protrusion 10 on the dividing surface side, and 15 is an inclined surface of the protrusion 10 on the layer dividing surface side. Note that l is the width of the bottom surface 11 of the protrusion 10 protruding toward the dividing surface side, and L is the protrusion dimension of the protrusion 10 in the radial direction.

In the split core configured as described above, the case where toroidal winding is applied to the yoke portion will be explained with reference to FIG. 3 and subsequent figures.

FIG. 3 shows a state in which the split core 1 according to an embodiment of the present invention is held by a chuck, and FIG. 4 is a state diagram showing the conditions that define the size of the projections 10 of the split core 1. , FIG. 6 is an enlarged view showing the case where the bottom surface 11 of the protrusion 10 and the corner 12 of the dividing surface 9 intersect are not according to the embodiment of the present invention, and FIG. 6 is an enlarged view of the divided iron core according to the embodiment of the present invention. It is an enlarged view of the maintenance 1 yen state.

Here, 1 is the split core, 3b is the split surface 9° protrusion 1
0 bottom surface 11. And the chuck part 3C supporting the protrusion side surface 14 is pressed against the anti-protrusion slope 16. The chuck piece 16 is the stator that has been assembled into a ring after the winding is completed (other coils and slots are not shown), 1 is the stator 16' (
(The thermosetting resin is integrally molded. 18 is a coil wound in the slot closest to the dividing surface that does not have a protrusion.

1. When winding is performed, the ends of the divided portions of the divided core 1 are held by chucks 3br and 3c. The method is split plane 9
Set the chuck 3b in contact with the bottom surface 11 of the protrusion and the side surface 14 of the protrusion, and press the backward bent chuck piece 3C against the other slope 16 of the protrusion with a force such as a spring (not shown) to form a wedge. The effect is to hold it in place. At this time, the dimensions of the protrusion 10 must be much smaller than the split core 1. This is because, if the protrusion 1o has a long dimension in the outer diameter direction of the split core 1, as shown in FIG. When composed of 17 and 17,
Part or the whole of the outer diameter dimension 2R needs to be large, which makes the product extremely uneconomical.Also, as rl protrudes to the outside of the dividing surface, the fourth
As shown in the figure, when the divided part 9 of another divided iron 1 that does not have a protrusion is assembled closely to the divided face 9 on the side having the protrusion 10, the protrusion on the divided face side has a protrusion. This is because the outer circumferential side of the coil 18 wound in the slot closest to the divided portion that is not covered will be compressed.

Therefore, in order to firmly hold this small protrusion 10, the dividing surface 9, the bottom surface 11 of the protrusion, and the side surface 14 on the dividing surface side of the protrusion are integrally supported by the chuck 3b as described above, and then the protrusion is A chuck piece 3Qi having a slope with the same angle as the slope 15 on the layer dividing surface side, and a spring or the like (not shown) parallel to the dividing surface 9 until the tip of the chuck piece 3C contacts the outer diameter of the iron core 1. In this case, since the inner part 4 of the bottom surface 11 of the protrusion 10 is very short, the chuck 3b contacts the entire width of the protrusion 10, and the chuck piece 3
Iron core 1 must be firmly held under the pressure of C.

However, if the protrusion 1o is enlarged as shown in FIG. 5, unless it is in accordance with one embodiment of the present invention, the intersection between the bottom surface 11 and the dividing surface 9 will be different due to the circumstances of the normal mold because the iron core 1 is punched out using a press. The corner 12 that has been formed is not an exact corner, but has a slight radius.
It ends up being the corner where I heard it. Therefore, the corner 19 of the chuck 3b that receives it must also be chamfered.
Since the entire width l of the bottom surface cannot be received and the iron core is actually held by the width β', the holding of the iron core becomes unstable. However, as shown in FIG. 6, when the corner 12 is provided with a recess 13 that does not cover the corner on the dividing surface side as in one embodiment of the present invention, the corner 19 of the chuck 3b also does not need to be chamfered.
It is possible to be suppressed by the chuck piece 3C as much as the width of the bottom surface L, and one object of the present invention is to firmly and reliably hold the iron core 1 while retaining blood on the tensile conductor during winding. This is possible.

Further, as shown in FIG. 6, if the portion of the chuck 3b in contact with the dividing surface 9 is slightly thicker than the inner diameter of the iron core 1, the holding strength of the iron core 1 can be maximized.

Next, FIG. 7 shows the case of winding the yoke part 4 of the slot of the iron rb1 held as described above.

After holding it at 3C, with the winding completed on the yoke part 4 of the slot) S+, insert the flyer 5, the iron core with the yoke part 4 of the slot S+ held in place with the flyer 5, and the yoke part 4 of the slot P+) held as it is. 1 is a diagram showing a state in which the wire is rotated in the direction of the arrow with the iron core as the center of full rotation, and the wire can be wound to the next switch S2. Here, since the winding guide 7 does not obstruct the chuck or its movement unlike the conventional example,
It is set so that it relatively protrudes from the iron core.

By providing the protrusion 1o of the present invention on the outer periphery of the core split surface as described in 2 below, the teeth 2 at the split end are not chucked, so there is no need to change the chuck or replace the guide during winding. Therefore, it becomes possible to greatly improve the winding efficiency. FIGS. 8 to 1o are diagrams of divided cores showing other embodiments of the present invention.

What differs from the configuration in FIG. 3 is the shape of the recess 13 provided at the corner 12 of the bottom surface 11 and the dividing surface 9.

Fig. 8 shows an example in which the four parts 13 are provided exactly at the corner 12, Fig. 9 shows an example in which the recess 13 is provided on the dividing surface side continuously from the bottom surface 11 of the protrusion 10, and Fig. 10 shows an example in which the recess 13 is provided in the dividing surface side. 9 in the extending direction.

As described above, even if the concave portion 13 of the corner portion 12 is provided in another direction, the chuck 3b that receives the pressure of the chuck piece 3C as in the first embodiment does not require chamfering of the corner portion 19, and the bottom surface 11 By receiving the entire width l, the iron core 1 can be held firmly and securely, and has the same effect as the first embodiment.

Effects of the Invention As described above, according to this embodiment, protrusions protruding outward in the radial direction and outwards from the dividing surfaces are provided in the vicinity of the dividing surfaces of the split core, and four portions are provided at the corners where the bottoms of the projections intersect with the dividing surfaces. By supporting the dividing surface, the bottom of the protrusion, and the side surface of the protrusion on the dividing surface side, and winding by pressing and clamping the chuck piece against the slope of the anti-dividing surface, it is possible to sufficiently small f
It is possible to firmly hold the X and protrusions ($), and it is also possible to wind wires in all slots without removing the wire guide during winding work, making it possible to combine winding work. It can have great effects.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the state of draw f-darling winding on the stator core of a conventional electric motor, Fig. 2 is a plan view of a divided iron core according to an actual sister example of the present invention with the slots omitted, and Fig. 3 is an actual sister example of the present invention. FIG. 4 is a plan view showing the state in which the divided iron core is held during winding according to the present invention; FIG. FIG. 6 is a sectional view showing a state in which the core is held according to an embodiment of the present invention; FIG. 6 is a sectional view showing a state in which the core is held according to an embodiment of the present invention; An explanatory diagram showing a winding state using a split core according to an example, and FIGS. 8 to 10 are enlarged plan views of protrusions of a split core according to other embodiments of the present invention. 1... Split core, 3b...chuck,
3C...Chuck piece, 9...Dividing surface, 1
0... Elevation, 11... Bottom of protrusion, 1
2... Corner, 13... Recess. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 8
Figure 9 Figure 10

Claims (1)

[Scope of Claims] (1) An annular stator iron plate is divided into a plurality of parts in the radial direction, and a protrusion that protrudes outward in the radial direction and outside of the divided surface is provided on the outer periphery of one of the divided surfaces of the divided iron plate, and Four parts are provided at the corner where the bottom surface of this protrusion and the dividing surface intersect, and these divided iron plates are stacked to form a divided core, and in the dividing direction of the side with the protrusion, there is another divided core without a protrusion. A fixed iron core for an electric motor that is assembled with its surfaces in close contact. (The fixed r-iron core of the electric motor according to claim 1, in which the concave portion is provided on the dividing surface side continuously from the bottom surface of the protrusion. (3) The concave portion is provided on the bottom surface of the protrusion at a position where the dividing surface is extended. A stator core for an electric motor according to claim 1. (4) An annular stator iron plate is divided into a plurality of parts in the radial direction, and a radially outer and divided A protrusion protruding outward from the surface is provided, and a recess is provided at the corner where the bottom surface of this protrusion and the dividing surface intersect, and the divided iron plates are stacked to form a divided iron core. , and supporting the side face facing the dividing surface of the protrusion, and holding the ash dividing surface 1t1 of the protrusion in a chuck to fully hold the divided iron core, and winding the divided iron core perpendicularly to the yoke part. A method of winding the identifer core of a motor that applies wires.