JP2002165423A - Method and device for winding coil on stator core - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coil winding method and a coil winding device for stator cores, which enable increase of space factors, and a stator core which enables a higher space factor. SOLUTION: This winding method is for winding wire to be performed, making the nozzle angle at the tip of a T-shaped nozzle 2 large, when the wire 1 to be wound in teeth 11 is a lower layer, and making the nozzle angle at the tip of the T-shaped nozzle 2 small, when the wire 1 to be wound in the teeth 11 is for higher layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator core winding method and a winding device for applying a conductive winding to teeth portions of a stator core.

[0002]

2. Description of the Related Art Conventionally, to form a coil portion on a stator core, as shown in FIG. 9 (a), a nozzle 101 for supplying a conductive winding is arranged in parallel with a center line 103 of a tooth portion 102, and Nozzle 101 centering on part 102
The coil part had to be formed while rotating. And the coil part 10 formed by the conventional winding method
4 was as shown in FIG. 9 (b).

[0003]

In the conventional winding method shown in FIG. 9B, the tip of the nozzle cannot be brought to the root of the teeth portion (near the yoke portion). The conductive winding cannot be wound. For this reason, a void is formed at the base of the tooth portion, and there is a limit to the improvement of the space factor.

An object of the present invention is to provide a winding method and a winding device for a stator core capable of improving a space factor, and a high-efficiency motor using a stator core capable of achieving a high space factor. .

[0005]

According to the present invention, the tip of an L-shaped nozzle for supplying a conductive winding draws a trajectory around the center of the teeth of the stator core, and the conductive winding is concentratedly wound around the teeth. When the conductive winding wound around the teeth is low, the nozzle angle at the tip of the L-shaped nozzle is large, and when the conductive winding wound around the teeth is high. Is a winding method for winding a conductive winding by reducing the nozzle angle at the tip of the L-shaped nozzle.
By using the letter-shaped nozzle, the tip of the nozzle extends near the bottom surface of the slot of the stator core, and winding is applied to the bottom surface of the slot, so that a motor having a high space factor can be provided.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION
The tip side nozzle of the L-shaped nozzle supplying the conductive winding is
Draw a trajectory around the teeth portion of the stator core, in the winding method of the stator core to concentrate the conductive winding around the teeth portion, during winding around the teeth portion,
A method of winding a stator core, characterized by changing an angle formed by a tip side nozzle of the L-shaped nozzle with respect to the trajectory, wherein a coil portion already wound during winding around a teeth portion Has the effect of preventing the tip side nozzle portion from contacting the nozzle.

According to a second aspect of the present invention, when the conductive winding wound around the teeth portion is a low layer, the tip side nozzle angle of the L-shaped nozzle is large, and the conductive winding wound around the teeth portion is a high layer. 2. The method according to claim 1, wherein the angle of the nozzle on the tip end side of the L-shaped nozzle is reduced at the time of the winding. This has the effect of preventing the tip side nozzle portion from contacting.

According to a third aspect of the present invention, the slot shape of the stator is characterized in that the stator bottom surface is deeper on the outer periphery side of the stator than a line extending perpendicularly from the center point of the stator bottom surface with respect to the teeth center line. The stator core winding method according to claim 1 or 2, wherein the slot has a function of forming more coil portions.

According to a fourth aspect of the present invention, the stator core comprises:
The stator core winding method according to any one of claims 1 to 3, wherein a plurality of steel plates having teeth integrally formed thereon are laminated, and more coil portions are formed in the slots. It has the effect that a stay core that can be obtained can be obtained.

[0010] According to a fifth aspect of the present invention, a tip side nozzle,
A bent portion, an L-shaped nozzle for supplying a conductive winding formed by a support-side nozzle, a nozzle rotation support portion capable of changing a tip-side nozzle angle of the L-shaped nozzle, It is a winding device of a stator core composed of a rotating part that rotates a U-shaped nozzle around a teeth part, and does not contact a tip side nozzle part with a coil part already wound during winding around a teeth part. Has an action.

According to a sixth aspect of the present invention, there is provided the stator core winding device according to the fifth aspect, wherein the L-shaped nozzle is arranged radially back and forth of the stator core. It has the effect that the position can be changed.

[0012]

FIG. 1 is a partial cross-sectional view of the winding apparatus of the present embodiment, FIG. 2 is a view of the winding apparatus as viewed from above, and FIG. 3 is a view showing the same L-shaped nozzle. 1 is a conductive winding, 2 is an L-shaped nozzle, 3 is a nozzle rotation support portion, 4 is a nozzle front and rear portion,
11 is a tooth portion, 12 is a slot, 21 is a bent portion, 22 is a tip side nozzle, 23 is a stator bottom surface, 24 is a support portion side nozzle, and 25 is a tooth portion center line.

The winding apparatus according to the present embodiment has an L-shaped nozzle 2 for supplying a conductive winding from the tip, an L-shaped nozzle 2 that supports the L-shaped nozzle 2, and an angle between the tip-side nozzle 22 of the L-shaped nozzle 2. And a nozzle front and rear part 4 for moving the L-shaped nozzle back and forth in the radial direction of the stator core, and the entirety of the L-shaped nozzle 2, the nozzle rotation support part 3 and the front and rear nozzle part 4 centered on the teeth. It consists of a rotating part that rotates.

[0014] With this winding device, the stator core is arranged and the coil portion is formed by concentrated winding. The stator core is
A plurality of thin electromagnetic steel sheets each having a plurality of teeth in an annular shape are stacked in the rotation axis direction. Slots 12 are formed between adjacent teeth portions 11. In addition, teeth part 1
The tip of 1 is T-shaped to reduce the open end of the slot 12.

When winding the teeth 11 of the stator, the winding device is first brought inside the stator. At this time, the L-shaped nozzle 2 is arranged in the slot 12 so as not to hit the teeth 11. The tip side nozzle 22 located on the tip side of the bent portion 21 of the L-shaped nozzle 2 is in a state of being parallel to the slot bottom face 23 of the stator as shown in FIG. Moving.

The reason for using the L-shaped nozzle in this way is that the slot shape of the stator is
5, the stator bottom surface 23 is made deeper toward the outer periphery of the stator than a line extending vertically from the center point of the stator bottom surface 23,
When the slot area is enlarged to form more coil portions in the slot, in a conventional nozzle, the conductive winding goes out perpendicular to the tooth portion, so the winding is wound on the tooth side of the bottom of the slot. This is because it was not performed.

FIG. 4 shows a continuous view of the process in which the L-shaped nozzle 2 moves, and is a view of the teeth portion viewed from the radial direction. In order to apply a conductive winding to the teeth 11, the winding device is set in the above-described state, and then the conductive winding 1 is applied to the teeth 11 to form a coil. When winding the teeth 11, as described later, the winding is performed while changing the nozzle angle R (see FIG. 4) formed by the tip-side nozzle 22 with respect to the locus of the movement of the support-side nozzle 24 of the L-shaped nozzle. Apply lines.

FIGS. 5 to 7 show the specific winding process of the present invention. FIG. 5 shows the movement of the nozzle and the inclination of the tip side nozzle when applying a low-layer winding, and FIG. 6 shows the winding of the middle layer. FIG. 7 is a diagram showing the movement of the nozzle and the inclination of the tip side nozzle when applying a line, and FIG. 7 is a diagram showing the movement of the nozzle and the inclination of the tip side nozzle when applying a high-layer winding. 15 is a longitudinal side surface of the teeth portion 11;
Reference numeral 7 denotes a tooth tip, and other symbols are the same as those described above, and description thereof is omitted.

First, the L-shaped nozzle 2 is arranged at a position as shown in FIG. 5, and the supply of the conductive winding 1 from the L-shaped nozzle 2 is started. FIG. 5 shows a cross section of the teeth portion 11 in the radial direction, and continuously shows the change of the tip side nozzle 22 during winding. The L-shaped nozzle 2 has the teeth 1
When rotating around 1, the direction of the nozzle is changed by the nozzle support so that the tip of the nozzle always faces the teeth.
When the L-shaped nozzle 2 applies the winding by passing through the long side surface 15 of the tooth portion 11, the tip side nozzle 22 and the long side surface 15 are perpendicular to each other. When the conductive winding 1 comes to the end portion 16, the tip side nozzle 22 moves so that the nozzle tip draws a semicircle.

After a conductive winding is wound around the teeth portion 11 by such a method, the L-shaped nozzle 2 is pulled toward the center of the stator core, and the winding position of the conductive winding is changed. 11 is provided with a conductive winding. The L-shaped nozzle 2 moves in the inner diameter direction of the stator core while winding the conductive winding to change the winding position, thereby forming the first layer coil portion of the teeth portion 11.

After the first-layer coil portion is formed, the second-layer coil portion is formed on the first-layer coil portion. Since the coil portion of the first layer starts to be wound from the slot bottom surface 23 side of the slot 12, the winding end of the first layer is near the tooth tip portion 17. When forming the coil portion of the second layer, winding is started from the vicinity of the tooth tip 17 following the end of the winding of the first layer. As shown in FIG.
While winding the conductive winding 1 around the teeth 11, the L-shaped nozzle 2 is moved in the radial direction of the stator core, and the tip-side nozzle 22 gradually approaches the slot bottom surface 23 to form the second layer. Form a coil part. When the second-layer conductive winding approaches the slot bottom surface 23, the conductive winding 1 is wound on the second-layer coil to form a third-layer coil. .

As described above, the L-shaped nozzle 2 moves in the radial direction of the stator core to form the coil portion while changing the winding position. However, when the conductive winding 1 is wound by about four layers, it becomes difficult to apply the conductive winding 1 because the tip of the nozzle approaches the coil portion.

Then, as shown in FIG. 6, the nozzle angle is changed, and the winding is applied in a state where the tip side nozzle 22 is slightly laid on the longitudinal side surface 15, that is, in a state where the nozzle angle is reduced. . By doing so, a gap is provided between the coil already wound and the tip of the nozzle, and a conductive winding can be applied.

When the number of layers of the conductive winding is further increased, the tip side nozzle 22 is laid on the longitudinal side surface 15 as shown in FIG. That is, the nozzle angle is further reduced. By laying the tip side nozzle 22 in this way,
The number of layers of the conductive winding 1 can be increased.

FIG. 8 is a partial sectional view of the coil portion.
The numbers A1, A2,... B1, B2,. This number is the winding order of the conductive winding. The winding order is A1, A2,... B1, B2,.
The teeth are wound in the order of C1 and C2. The younger the left term, the earlier the left term. If the left term is the same, the younger right term is wound earlier.

In the present embodiment, the winding can be applied to the bottom of the slot by making the shape of the nozzle L-shaped.

[0027]

As described above, according to the first aspect of the present invention, the shape of the nozzle is L-shaped, and the winding is applied while changing the nozzle angle, thereby increasing the space factor on the stator. The advantageous effect that it is possible to provide a winding method that can perform the above-described method can be obtained.

According to the second aspect of the present invention, when the conductive winding wound around the teeth portion is a low layer, the nozzle angle at the tip end of the L-shaped nozzle is large, and the conductive winding wound around the teeth portion is large. In the case of a high rise, the angle of the nozzle at the tip end of the L-shaped nozzle is reduced, so that it is possible to provide a winding method capable of applying a winding with a high space factor to the stator. Can be.

According to the third aspect of the present invention, the slot shape of the stator is set such that the stator bottom surface is deeper on the outer periphery side of the stator than a line extending perpendicularly from the center point of the stator bottom surface with respect to the teeth center line. As a result, more coil portions can be formed, and the advantageous effect that a highly efficient motor can be provided can be obtained.

According to the fifth aspect of the present invention, it is possible to provide a winding device capable of applying a winding with a high space factor to the stator by applying the winding while changing the nozzle angle. The advantageous effect that there is can be obtained.

[Brief description of the drawings]

FIG. 1 is a partial sectional view of a winding device according to an embodiment of the present invention.

FIG. 2 is a top view of the winding apparatus according to the embodiment of the present invention.

FIG. 3 is a diagram showing an L-shaped nozzle according to an embodiment of the present invention.

FIG. 4 is a diagram showing the movement of a nozzle according to an embodiment of the present invention.

FIG. 5A is a cross-sectional view of a stator when a low-layer winding according to an embodiment of the present invention is applied. FIG.

FIG. 6A is a sectional view of a stator when a middle-layer winding is applied according to the embodiment of the present invention. FIG. 6B is a diagram showing the movement of the nozzle and the inclination of the tip-side nozzle when the middle-layer winding is applied.

FIG. 7A is a cross-sectional view of a stator when a high-layer winding according to an embodiment of the present invention is applied. FIG.

FIG. 8 is a diagram showing the order of windings according to the embodiment of the present invention.

9A is a view showing a conventional winding method, and FIG. 9B is a sectional view of the stator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conductive winding 2 L-shaped nozzle 3 Nozzle rotation support part 4 Nozzle front and rear part 11 Teeth part 12 Slot 21 Bend part 22 Tip side nozzle 23 Slot bottom 24 24 Support side nozzle 25 Teeth part center line

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5H002 AA07 AA09 AE06 5H603 AA09 BB01 CA01 CC05 CC11 CC17 CD21 CE01 5H615 AA01 BB01 BB14 PP01 PP08 PP10 PP13 QQ02 QQ19 SS05

Claims (6)

[Claims] 1. An L-shaped nozzle for supplying a conductive winding has a tip side nozzle which draws a trajectory around a tooth portion of a stator core, and a winding of the stator core which concentrates the conductive winding around the tooth portion. In the wire method, an angle formed by a tip side nozzle of the L-shaped nozzle with respect to the trajectory is changed with respect to the trajectory during winding around the teeth portion. 2. The tip-side nozzle angle of the L-shaped nozzle is large when the conductive winding wound around the teeth is low, and L-shaped when the conductive winding wound around the teeth is high. 2. The method according to claim 1, wherein the nozzle angle at the tip of the nozzle is reduced. 3. The stator according to claim 1, wherein the shape of the slot of the stator is such that the stator bottom surface is deeper on the outer periphery side of the stator than a line extending perpendicularly from the center point of the stator bottom surface with respect to the teeth center line. Item 3. A method for winding a stator core according to Item 2. 4. The stator core according to claim 1, wherein a plurality of steel plates integrally formed with teeth are laminated.
The method of winding a stator core according to any one of claims 1 to 3. 5. An L-shaped nozzle for supplying a conductive winding formed by a tip-side nozzle, a bent portion, and a support-side nozzle, and changing a tip-side nozzle angle of the L-shaped nozzle. A winding device for a stator core constituted by a possible nozzle rotation support part and a rotation part for rotating the L-shaped nozzle around the teeth part. 6. The winding device for a stator core according to claim 5, wherein the L-shaped nozzles are arranged back and forth in the radial direction of the stator core.