Wire material winding method

Abstract

To improve a space factor of a wire material on a magnetic pole of a stator core by winding the wire material around the magnetic pole with high precision.SOLUTION: In a wire material winding method, as a result of a combination of oscillation of a magnetic pole 13b about a center axis O of a stator and movement of a nozzle 11 in a slot 13c between the magnetic poles to the center axis O of the stator, a tip of the nozzle 11 is rotated around the magnetic pole 13b, whereby a wire material 12 fed out from the tip of the nozzle 11 is wound around the magnetic pole 13b. Then, when the magnetic pole 13b oscillates, the nozzle 11 is moved to a radial direction of the stator, and the tip of the nozzle 11 from which the wire material 12 is fed out, is linearly moved in an oscillation direction with respect to the magnetic pole 13b.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a winding method for winding a wire that is fed from the tip of a nozzle around magnetic poles that are formed to protrude in the radial direction of a stator. [Background technology]

[0002] Conventionally, the stator of an inner rotor type motor is formed by winding wire around multiple magnetic poles that protrude on the inner side of a stator core made of multiple stacked annular members, while the stator of an outer rotor type motor is formed by winding wire around multiple magnetic poles that protrude radially from the outer side of the stator core.

[0003] Conventionally, as a winding device for each magnetic pole of this stator core, the applicant has proposed a winding device that includes a stator support means that rotatably supports the stator core around the central axis of the stator as the center of rotation, and a moving mechanism that moves a nozzle in each of the three axial directions (see, for example, Patent Document 1).

[0004] In this winding device, the rotation of the stator core is combined with the axial movement of the stator of the nozzle that pays out the wire, causing the tip of the nozzle, which is the wire payout end, to move around the magnetic pole and wind the wire paid out from the tip around the magnetic pole. By precisely controlling the rotation of the stator core and the axial movement of the nozzle, a stator in which the wire is wound in alignment around each magnetic pole can be obtained. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 10-271774 Summary of the Invention [Problem to be solved by the invention]

[0006] However, when the stator core is rotated, the magnetic poles 3b protruding in the radial direction of the stator core 3 move in an arc, as shown by the solid and dashed arrows in Fig. 10. For this reason, when the stator core 3 is rotated and the wire 2 fed out from the tip of the nozzle 1 is wound around the magnetic poles 3b, the tip of the nozzle 1 moves in an arc relative to the magnetic poles 3b, and the wire 2 fed out from the tip moves in an arc to be wound around the magnetic poles 3b.

[0007] The wire 2 fed from the tip of the nozzle 1 moving in an arc shape tends to have an arc shape, which causes variations in tension of the wire 2 wound around the magnetic pole 3b. Such variations in tension become an obstacle when winding the wire 2 in an orderly manner around the magnetic pole 3b, and as a result, it becomes difficult to improve the space factor of the wire 2 for the magnetic pole 3b, which is an issue that has yet to be resolved.

[0008] The present invention has been made in consideration of these problems, and has as its object to provide a winding method for winding wire around the magnetic poles of a stator core with high precision, thereby improving the space factor of the wire in the magnetic poles. [Means for solving the problem]

[0009] The present invention is an improvement to a wire winding method in which the tip of the nozzle is wound around the magnetic pole by combining the oscillation of the magnetic poles around the central axis of the stator core and the movement of the nozzle in the slot between the magnetic poles in the direction of the central axis of the stator core, thereby causing the tip of the nozzle to circle around the magnetic pole and winding the wire fed from the tip of the nozzle around the magnetic pole.

[0010] Its distinctive feature is that when the magnetic poles oscillate, the nozzle is moved in the radial direction of the stator core, and the tip of the nozzle from which the wire is paid out is moved linearly in the oscillating direction relative to the magnetic poles. Effect of the Invention

[0011] In the wire winding method of the present invention, the nozzle is moved back and forth in the slot of the stator core, while the stator core is rotated to oscillate the magnetic poles protruding radially, and by combining these actions, the nozzle is moved in a circular motion around the magnetic poles, and the wire fed out from the nozzle is wound around the magnetic poles of the stator core.

[0012] When the magnetic pole oscillates, the nozzle is moved in the radial direction of the stator core, and the tip of the nozzle from which the wire is paid out is moved linearly in the oscillation direction relative to the magnetic pole, so that the wire paid out from the tip of the nozzle can be wound linearly around the magnetic pole without developing an arc-shaped tendency.

[0013] This prevents variations in tension of the wire wound around the magnetic poles and prevents winding irregularities from occurring in the windings. As a result, the wire is wound around the magnetic poles of the stator core with high precision, and the space factor of the wire in the magnetic poles can be improved. [Brief description of the drawings]

[0014] [Figure 1] 5 is a cross-sectional view taken along line AA in FIG. 4, illustrating a winding method according to an embodiment of the present invention. [Diagram 2] 4A and 4B show the movement of the nozzle relative to the magnetic poles. [Diagram 3] This is a diagram of an outer rotor type stator with wire wound around its magnetic poles, as viewed from the axial direction. [Figure 4] FIG. 2 is a front view of a winding device capable of carrying out the method. [Diagram 5] 11A to 11C are diagrams showing a winding method for the magnetic poles of another stator core of the present invention. [Figure 6] 4A and 4B show the movement of the nozzle relative to the magnetic poles. [Figure 7] FIG. 11 is a view of the other inner rotor type stator as viewed from the axial direction. [Figure 8] 13 is a perspective view showing a winding device used for winding the other stator core. FIG. [Figure 9]9 is a cross-sectional view taken along the line BB in FIG. 8, illustrating a state in which the wire is wound around the magnetic pole by the alternative winding device. [Figure 10] FIG. 2 is a diagram corresponding to FIG. 1 and illustrating the movement of a nozzle in a conventional winding method. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Next, the best mode for carrying out the present invention will be described with reference to the drawings.

[0016] Fig. 4 illustrates a wire winding device 10 capable of carrying out the method of the present invention. In the figure, three mutually orthogonal axes, X, Y, and Z, are set, with the X axis extending in a substantially horizontal front-rear direction, the Y axis extending in a substantially horizontal lateral direction, and the Z axis extending in a vertical direction. First, this winding device 10 will be described.

[0017] This winding device 10 winds wire 12 fed from a nozzle 11 around magnetic poles 13b of a stator core 13. As shown in Fig. 3, an outer rotor type stator core 13 is used in this embodiment and includes a circular annular portion 13a and a plurality of magnetic poles 13b protruding radially from the outer circumferential surface of this annular portion 13a toward the outside of the annular portion 13a.

[0018] 4, in this winding device 10, a support 18 for supporting the stator core 13 is provided on the upper surface of a machine base 14 installed at an installation location, via a swing servo motor 19. The swing servo motor 19 is attached to the upper surface of the machine base 14 with a rotation shaft 19a facing upward in the Z-axis direction, and a mounting plate 21 is provided upright on the upper surface of the machine base 14, shifted from the swing servo motor 19 in the Y-axis direction.

[0019] The support 18 that supports the stator core 13 has a rod-shaped core material 18a extending vertically and for mounting the stator core 13 horizontally on its upper edge, and a pressing member 18b that presses the stator core 13 mounted on the upper edge of the core material 18a from above. The rod-shaped core material 18a has its lower end attached to a rotating shaft 19a of a swing servomotor 19, and its upper part is formed with an outer diameter slightly smaller than the outer diameter of the annular portion 13a of the stator core 13 (FIG. 3).

[0020] A linear motion guide rail 23 is attached to the mounting plate 21 on the side facing the swing servo motor 19, extending in the vertical direction, and a lifting member 22 is attached to this guide rail 23 so as to be movable up and down. The pressing member 18b is attached to the lifting member 22 so that its central vertical axis coincides with the central axis of the rod-shaped core material 18a and is rotatable about the vertical axis as the center of rotation, and a lifting cylinder 24 is provided on the mounting plate 21 above the lifting member 22 for lifting and lowering the lifting member 22 together with the pressing member 18b.

[0021] The lower part of the pressing member 18b, which actually presses from above the stator core 13 placed on the upper edge of the core material 18a, is formed with an outer diameter slightly smaller than the outer diameter of the annular portion 13a of the stator core 13 (Figure 1). The annular portion 13a of the stator core 13 is sandwiched between the core material 18a and the pressing member 18b, and the magnetic poles 13b protrude radially outward from the annular portion 13a.

[0022] The rod-shaped core material 18a has its lower end attached to the rotating shaft 19a of the oscillating servo motor 19. Therefore, when the rotating shaft 19a of the servo motor 19 rotates, the rod-shaped core material 18a rotates together with the rotating shaft 19a, and the stator core 13 sandwiched between the rod-shaped core material 18a and the pressing member 18b rotates around the central axis of the support 18 consisting of the rod-shaped core material 18a and the pressing member 18b.

[0023] The stator core 13 is placed on the upper edge of the rod-shaped core material 18a so that its center coincides with the central axis of the support 18 and is clamped by the pressing member 18b, so that the magnetic poles 13b around the stator core 13 are configured to oscillate as the stator core 13 rotates.

[0024] The winding device 10 is also provided with a nozzle 11 that pays out the wire 12, and a nozzle moving mechanism 30 that moves the nozzle 11. The nozzle moving mechanism 30 is provided on the upper surface of the machine base 14 adjacent to the swing servo motor 19, which is a stator core operating mechanism, and includes a front-rear direction drive unit 31 that moves the nozzle 11 in the X direction, and a vertical direction drive unit 32 that moves the nozzle 11 parallel to the axis of the stator core 13.

[0025] The fore-and-aft drive unit 31 includes a fore-and-aft guide 31a arranged on the machine base 14 along the X-axis, which is the drive direction, a fore-and-aft rotation shaft 31b arranged parallel to the fore-and-aft guide 31a and having a spiral male screw on its surface, a fore-and-aft moving member 31d that is screwed into the fore-and-aft rotation shaft 31b by a ball screw and can move along the fore-and-aft guide 31a by rotation of the fore-and-aft rotation shaft 31b, and a fore-and-aft drive source 31c that rotates and drives the fore-and-aft rotation shaft 31b.

[0026] The forward / rearward drive source in this embodiment is a forward / rearward servomotor 31c, and a vertical drive unit 32 is attached to a forward / rearward moving member 31d which is moved by being driven by the servomotor 31c.

[0027] This vertical drive unit 32 includes a vertical guide 32a that is erected on a front-rear moving member 31d along the Z-axis, which is the drive direction, a vertical rotation shaft 32b that is arranged parallel to the vertical guide 32a and has a helical male screw on its surface, a vertical moving member 32d that is screwed into the vertical rotation shaft 32b by a ball screw and can move along the vertical guide 32a by rotation of the vertical rotation shaft 32b, and a vertical drive source 32c that rotationally drives the vertical rotation shaft 32b.

[0028] The vertical drive source in this embodiment is also a vertical servo motor 32c, and a movable base 33 is attached to a vertical moving member 32d that is moved by the drive of the servo motor 32c. An extension plate 34 is fixed to the movable base 33, extending in the Y-axis direction, and a nozzle 11 is fixed to the extension plate 34, extending in the X-axis direction.

[0029] The nozzle 11 has a large diameter portion 11a fixed to the extension plate 34, and a small diameter portion 11b continuous with the large diameter portion 11a. As shown in Fig. 1, the small diameter portion 11b is provided coaxially with the large diameter portion 11a, and the small diameter portion 11b is formed with an outer diameter capable of entering a slot 13c between magnetic poles 13b of the stator core 13. A through hole through which the wire 12 can be inserted is provided in the large diameter portion 11a and the small diameter portion 11b along their central axes, and the wire 12 inserted in the through hole can be paid out from the tip of the small diameter portion 11b.

[0030] Next, a winding method of the present invention using this winding device will be described.

[0031] In a winding operation using this winding device 10, first, the stator core 13 is supported by the support 18. During this support, the front-rear direction drive unit 31 moves its front-rear direction moving member 31d together with the vertical direction drive unit 32 away from the support 18 as shown by the solid arrow in FIG.

[0032] In this state, the rod 24a of the lifting cylinder 24 provided on the mounting plate 21 is retracted to raise the lifting member 22, and the pressing member 18b attached to the lifting member 22 is raised as shown by the dotted dashed arrow to form a space below it and between it and the rod-shaped core material 18a, and the stator core 13 is placed horizontally on the upper edge of the rod-shaped core material 18a through that space.

[0033] Then, the rod 24a of the lifting cylinder 24 is extended to lower the lifting member 22 as shown by the two-dot chain arrow, and the pressing member 18b, which descends together with the lifting member 22, presses down the stator core 13 placed on the upper edge of the rod-shaped core material 18a from above as shown in Fig. 4. Thereafter, the front-rear direction drive unit 31 moves its front-rear direction moving member 31d together with the vertical direction drive unit 32 and the nozzle 11 toward the stator core 13 as shown by the dashed arrow in Fig. 4.

[0034] When the actual winding is to begin, the end of the wire 12 fed from the tip of the nozzle 11 is bound and fixed to a binding pin or a wire clamp device (not shown).

[0035] The winding method of the present invention is a method in which the tip of the nozzle 11 is wound around the magnetic pole 13b by combining the oscillation of the magnetic pole 13b and the movement of the nozzle 11 in the axial direction of the stator core 13 through the slot 13c between the magnetic poles, as shown in Figure 2, and the wire 12 paid out from the tip of the nozzle 11 is wound around the magnetic pole 13b, as shown in Figure 1.

[0036] In the winding device 10 of FIG. 4, first, the nozzle 11 is brought close to the stator core 13 by the forward / rearward drive unit 31, and the tip of the nozzle 11, i.e., the tip of the wire rod payout end of the small diameter portion 11b, is made to face or enter the slot 13c formed between the magnetic poles 13b of the stator core 13, as shown in FIG.

[0037] The nozzle 11 is moved in the axial direction of the stator core 13 by moving the nozzle 11 in the Z-axis direction with the vertical drive unit 32. In this manner, when the tip of the nozzle 11 is in a slot 13c sandwiched between the magnetic pole 13b to be wound and one of the adjacent magnetic poles 13b, the magnetic pole 13b is not oscillated by the oscillating servo motor 19, and only the nozzle 11 is moved in the axial direction of the stator core 13.

[0038] On the other hand, the oscillation of the magnetic pole 13b, with the central axis of the stator as its center of rotation, begins when the tip of the nozzle 11 has come out of the slot 13c, as shown in FIG. 2, and ends when the tip of the nozzle 11 faces the adjacent slot 13c between the magnetic pole 13b around which the winding is wound and the adjacent magnetic pole 13b on the other side.

[0039] By alternately repeating such movement of the nozzle 11 and the oscillation of the magnetic pole 13b, the nozzle 11 moves circularly around the magnetic pole 13b along the cross-sectional shape of the magnetic pole 13b, and the wire 12 paid out from the tip of the nozzle 11 is wound around the magnetic pole 13b.

[0040] The present invention is characterized in that, as shown in FIG. 1, the nozzle 11 is moved in the radial direction of the stator core 13 when the magnetic pole 13b oscillates, and the tip of the nozzle 11 from which the wire 12 is paid out is moved linearly in the oscillating direction relative to the magnetic pole 13b.

[0041] That is, the oscillation of the wound magnetic pole 13b is achieved by rotating the stator core 13 about its central axis O as the center of rotation. Therefore, when the magnetic pole 13b is oscillated while the nozzle 11 is fixed, the tip of the nozzle 11 from which the wire 12 is paid out moves in the circumferential direction of the stator core 13 in an arc relative to the magnetic pole 13b (Figure 10).

[0042] However, the winding method of the present invention is characterized in that the nozzle 11 is moved back and forth in the radial direction of the stator core 13 by an amount equivalent to the radial displacement of a single magnetic pole 13b caused by the arc in the oscillation direction, and the tip of the nozzle 11 is moved linearly relative to the magnetic pole 13b in the oscillation direction of the magnetic pole 13b.

[0043] Specifically, when the magnetic pole 13b starts to oscillate from the state shown in FIG. 1(a) in which the tip of the nozzle 11 has come out of the slot 13c, the nozzle 11 is gradually brought closer to the center of rotation of the magnetic pole 13b until the tip of the nozzle 11 reaches the center of the width of the magnetic pole 13b, as shown in FIG. 1(b).

[0044] Then, after the tip of the nozzle 11 reaches the center of the width of the magnetic pole 13b, as shown in Figure 1 (c), the nozzle 11 is gradually moved away from the magnetic pole 13b, and when the tip of the nozzle 11 faces the adjacent slot 13c between the magnetic pole 13b to be wound and the adjacent magnetic pole 13b on the other side, the position of the nozzle 11 is adjusted to coincide with the distance L from the center of rotation at the position facing the previous slot 13c.

[0045] The amount of movement A is expressed as A=L(1-cosθ), where θ is the swing angle of the magnetic pole 13b and L is the distance from the swing center O to the tip of the nozzle 11 in the slot 13c at the start of swing. In this way, it is possible to move the tip of the nozzle 11 from which the wire 12 is paid out linearly in the width direction of the magnetic pole 13b when the magnetic pole 13b swings.

[0046] When the tip of the nozzle 11 is moved linearly in the width direction of the magnetic pole 13b in this manner, the wire 12 fed from the nozzle 11 is guided straight in the width direction of the magnetic pole 13b and wound, and the wire 12 fed from the tip of the nozzle 11 can be wound linearly around the magnetic pole 13b without developing an arc-like tendency. This prevents the tension of the wire 12 wound around the magnetic pole 13b from varying, and makes it possible to avoid irregular winding of the wire.

[0047] On the other hand, in order to wind the wire 12 in an aligned manner around the magnetic pole 13b, it is necessary to move the nozzle 11 around the magnetic pole 13b and to move the orbital position of the nozzle 11 in the X-axis direction by the front-rear direction drive unit 31 by the diameter of the wire 12 for each turn of the wire 12. However, this movement of the orbital position of the nozzle 11 is performed separately from the reciprocating movement of the nozzle 11 in the X-axis direction when the magnetic pole 13b is oscillating.

[0048] Even if the rotational position has moved in the axial direction of the magnetic pole 13b, i.e., in the radial direction of the stator core 13, by the diameter of the wire 12, when the magnetic pole 13b oscillates, the nozzle 11 is caused to move back and forth in the radial direction of the stator core 13, so that the tip of the nozzle 11 moves linearly relative to the magnetic pole 13b in the oscillating direction of the magnetic pole 13b.

[0049] As a result, even if the winding position is shifted by the diameter of the wire 12, the wire 12 fed from the tip of the nozzle 11 is wound linearly around the magnetic pole 13b without developing an arc-like tendency, thereby preventing the winding from becoming distorted. By repeating such winding of the nozzle 11, it becomes possible to wind the wire 12 in an aligned manner with high precision around the magnetic pole 13b, and it becomes possible to improve the space factor of the wire 12 on the magnetic pole 13b.

[0050] This type of winding is performed on all magnetic poles 13b. After winding has been completed on all magnetic poles 13b, as shown in FIG. 3, stator core 13 is removed from support 18, and the series of winding operations is completed.

[0051] Another embodiment of the present invention is shown in Figures 5 to 9. In this another embodiment, the same reference numerals as those in the previous embodiment denote the same parts, and repeated explanations will be omitted.

[0052] As shown in FIG. 7, the stator core 63 in this alternative embodiment is of an inner rotor type and includes a circular annular portion 63a and a plurality of magnetic poles 63b protruding from the inner circumferential surface of the annular portion 63a toward the center of the annular portion 63a.

[0053] 8 shows a winding device 60 which winds wire around the magnetic poles 63b of a stator core 63 such as this inner rotor type. The machine base 14 of this winding device 60 is provided with a support device 68 on which such a stator core 63 is mounted. This support device 68 includes a fixed base 68a arranged on the machine base 14, a rotating base 68b which is rotatably attached to the fixed base 68a in a horizontal plane and on which the stator core 63 can be mounted and fixed, and a swing servo motor (not shown) which rotates the rotating base 68b.

[0054] The winding device 60 in this embodiment includes a machine base 14 that is provided with the support device 68 and installed at an installation location, and a driving means 70 that is provided on the machine base 14 and drives the nozzle 11 in three axial directions. The driving means 70 is made up of a combination of three axial direction driving units 71, 72, and 73, and includes a front-rear direction driving unit 71, a left-right direction driving unit 72, and a top-bottom direction driving unit 73. These driving units 71, 72, and 73 are substantially the same driving mechanism along the driving directions X, Y, and Z.

[0055] First, the vertical drive unit 73 will be described. This vertical drive unit 73 is provided with a vertical guide 73a arranged along the drive direction Z, a vertical rotation shaft 73b arranged parallel to the vertical guide 73a and having a male screw on its surface, a vertical movement unit 73c that is screwed into the vertical rotation shaft 73b by a ball screw and can move along the vertical guide 73a, a vertical connection unit 73d connected to the vertical movement unit 73c, and a vertical drive source 73e that rotates and drives the vertical rotation shaft 73b.

[0056] The front-rear direction drive unit 71 and the left-right direction drive unit 72 are arranged along drive directions X and Y shown in Fig. 8 as a structure similar to that of the up-down direction drive unit 73. The front-rear direction drive unit 71 is fixed to the machine base 14 and equipped with a front-rear direction drive source 71e, and the left-right direction drive unit 72 is arranged to be movable in the front-rear direction relative to the front-rear direction drive unit 71 via a front-rear direction connection part 71d.

[0057] The left-right drive unit 72 includes a left-right drive source 72e, and the up-down drive unit 73 is disposed so as to be movable left-right relative to the left-right drive unit 72 via a left-right connection portion 72d.

[0058] Each of the drive sources 71e, 72e, 73e may be, for example, a servo motor that can be controlled with high precision. A movable base 64 that is parallel to the axial direction of the stator core 63 supported by the support device 68 is attached to the tip of the vertical connection part 73d of the vertical drive part 73. The lower part of the movable base 64 is formed in a rod shape that can be inserted into the stator core 63, and the nozzle 11 is fixed to the vicinity of the lower end thereof while extending in the X-axis direction.

[0059] 9, a first pulley 76 that redirects the wire 12 that has passed through the nozzle 11 is provided on the movable base 64, and a through hole 73f is formed in the vertical connection part 73d to allow the wire 12 that has passed through the nozzle 11 and been redirected by the first pulley 76 to pass through. A second pulley 77 that guides the wire 12 that has been redirected by the first pulley 76 to the through hole 73f is provided on the vertical connection part 73d.

[0060] Next, a winding method of the present invention using such a winding device will be described.

[0061] In a winding operation using this winding device 60, first, the wire 12 is passed through the nozzle 11 and fed out from the tip of the nozzle 11. Then, when starting winding, the driving means 70 moves the nozzle 11 in three dimensional directions and fixes the end of the wire 12 by winding it around a binding pin or a wire clamp device (not shown). Thereafter, the driving means 70 is driven to move the nozzle 11, which is in a horizontal position, to the slot 63c between the magnetic pole 63b on the stator core 63 where winding is to be performed and the adjacent magnetic pole 63b, as shown in FIG.

[0062] Next, the actual winding is performed. In the winding method of the present invention, the nozzle 11 is reciprocated in the Z-axis direction by the driving means 70, and the rotating table 68b is rotated forward and backward together with the stator core 63 by a swing servo motor (not shown) of the support device 68 so that the magnetic pole 63b to be wound swings. By combining these operations, the nozzle 11 is moved around the magnetic pole 63b in a circular motion following the cross-sectional shape of the magnetic pole 63b, as shown in FIG.

[0063] When the tip of the nozzle 11 is in a slot 63c between the wound magnetic pole 63b and one of the adjacent magnetic poles 63b, the nozzle 11 is moved in the Z-axis direction by lowering or raising only the nozzle 11 without oscillating the magnetic pole 63b by an oscillating servo motor (not shown).

[0064] Then, after the tip of the nozzle 11 comes out of the slot 63c, the magnetic pole 63b starts to oscillate, and the oscillation is terminated at the stage when the tip of the nozzle 11 is located above or below the adjacent slot 63c between the magnetic pole 63b wound and the other adjacent magnetic pole 63b. The oscillation of the magnetic pole 63b is performed by rotating the stator core 63, and the rotation is performed by an oscillation servo motor (not shown) in the support device 68.

[0065] By repeating this movement of the nozzle 11 and the oscillation of the magnetic pole 63b due to the rotation of the stator core 63 in alternating directions, the nozzle 11 is caused to move in a circle around the magnetic pole 63b along the cross-sectional shape of the magnetic pole 63b, as shown by the arrow in Figure 6.

[0066] The present invention is characterized in that the nozzle 11 is moved in the radial direction of the stator when the magnetic pole 63b oscillates, and the tip of the nozzle 11 from which the wire 12 is paid out is moved linearly in the width direction of the magnetic pole 63b.

[0067] That is, the oscillation of the wound magnetic pole 63b is achieved by rotating the stator core 63 about its central axis. Therefore, when the magnetic pole 63b is oscillated while the nozzle 11 is fixed, the tip of the nozzle 11 from which the wire 12 is paid out moves in the circumferential direction of the stator core 63 in an arc relative to the magnetic pole 63b (FIG. 10).

[0068] However, the winding method of the present invention is characterized in that, as shown in Figure 5, the nozzle 11 is moved back and forth in the radial direction of the stator core 63 by an amount equivalent to the radial displacement of a single magnetic pole 63b caused by the arc in the oscillation direction, and the tip of the nozzle 11 is moved linearly relative to the magnetic pole 63b in the oscillation direction of the magnetic pole 63b.

[0069] Specifically, when the magnetic pole 63b starts to oscillate from the state shown in FIG. 5(a) in which the tip of the nozzle 11 has come out of the slot 63c, the nozzle 11 is moved closer to the center of rotation of the magnetic pole 63b until the tip of the nozzle 11 reaches the center of the width of the magnetic pole 63b, as shown in FIG. 5(b).

[0070] Then, after the tip of the nozzle 11 reaches the center of the width of the magnetic pole 63b, as shown in Figure 5 (c), the nozzle 11 is moved away from the center of rotation of the magnetic pole 63b, and when the tip of the nozzle 11 faces the adjacent slot 63c between the magnetic pole 63b to be wound and the other adjacent magnetic pole 63b, the position of the nozzle 11 is adjusted to match the distance from the center of rotation at the position facing the previous slot 63c.

[0071] The relationship between this movement amount A and the swing angle is the same as in the embodiment described above, and by doing so, it is possible to move the tip of the nozzle 11 from which the wire 12 is paid out when the magnetic pole 63b swings linearly in the width direction of the magnetic pole 63b.

[0072] When the tip of the nozzle 11 is moved linearly in the width direction of the magnetic pole 63b in this manner, the wire 12 fed from the nozzle 11 is guided straight in the width direction of the magnetic pole 63b and wound, and the wire 12 fed from the tip of the nozzle 11 can be wound linearly around the magnetic pole 63b without developing an arc-like tendency. This prevents the tension of the wire 12 wound around the magnetic pole 63b from varying, and makes it possible to avoid irregular winding of the wire.

[0073] On the other hand, in order to wind the wire 12 in an aligned manner around the magnetic pole 63b, it is necessary to move the nozzle 11 around the magnetic pole 63b and to move the rotational position of the nozzle 11 in the X-axis direction by the diameter of the wire 12 for each turn of the wire 12. However, this movement of the rotational position of the nozzle 11 is performed separately from the reciprocating movement of the nozzle 11 in the X-axis direction when the magnetic pole 63b is oscillating.

[0074] Even if the rotational position has moved in the axial direction of the magnetic pole 63b, i.e., in the radial direction of the stator core 63, by the diameter of the wire 12, when the magnetic pole 63b oscillates, the nozzle 11 is caused to move back and forth in the radial direction of the stator core 63, so that the tip of the nozzle 11 moves linearly relative to the magnetic pole 63b in the oscillating direction of the magnetic pole 63b.

[0075] As a result, even if the winding position is shifted by the diameter of the wire 12, the wire 12 fed from the tip of the nozzle 11 is wound linearly around the magnetic pole 63b without developing an arc-like tendency, thereby preventing the winding from becoming distorted. By repeating such winding of the nozzle 11, it becomes possible to wind the wire 12 in an aligned manner with high precision around the magnetic pole 63b, and it becomes possible to improve the space factor of the wire 12 on the magnetic pole 63b.

[0076] Then, this type of winding is performed on all of the magnetic poles 63b. After the winding has been completed on all of the magnetic poles 63b, as shown in FIG. 7, the stator core 63 is removed from the support device 68, and the series of winding operations is completed.

[0077] In the above-described embodiment, the central axes of the stator cores 13, 63 are vertical and the wire 12 is wound around the magnetic poles 13b, 63b. However, this is merely an example, and the winding method of the wire 12 may be such that the central axes of the stator cores 13, 63 are horizontal and the wire 12 is wound around the magnetic poles 13b, 63b. [Explanation of symbols]

[0078] 11 Nozzle 12 Wire rod 13,63 Stator core 13b,63b magnetic pole 13c,63c Slots

Claims

1. A wire winding method for winding a wire (12) fed from a tip of the nozzle (11) around the magnetic pole (13b, 63b) by combining a swing of the magnetic pole (13b, 63b) about a central axis (O) of a stator core (13, 63) as a center of rotation and a relative movement of the nozzle (11) in a direction of the axis (O) of the stator core (13, 63) with respect to a slot (13c, 63c) between the magnetic poles, the method comprising the steps of: winding a wire (12) fed from a tip of the nozzle (11) around the magnetic pole (13b, 63b), the wire (12) comprising: When the magnetic poles (13b, 63b) are oscillated, the nozzle (11) is moved in the radial direction of the stator core (13, 63), so that the tip of the nozzle (11) from which the wire rod (12) is fed is linearly moved relative to the magnetic poles (13b, 63b) in the width direction. A method for winding a wire comprising the steps of:

2. The relative movement of the magnetic pole (13b, 63b) at the tip of the nozzle (11) in the width direction is 2. The wire winding method according to claim 1, wherein the nozzle (11) is moved closer to the center of rotation of the magnetic pole (13b, 63b) from a state in which the tip of the nozzle (11) has come out of the slot (13c, 63c) of the stator core (13, 63) until the tip of the nozzle (11) reaches the center in the width direction of the magnetic pole (13b, 63b), and after the tip of the nozzle (11) has reached the center in the width direction of the magnetic pole (13b, 63b), the nozzle (11) is moved away from the center of rotation of the magnetic pole (13b, 63b).

3. A wire winding method as described in claim 2, wherein the stator core (13) has a circular annular portion (13a) and a plurality of magnetic poles (13b) protruding radially from the outer peripheral surface of the annular portion (13a) toward the outside of the annular portion (13a).

4. A wire winding method as described in claim 2, wherein the stator core (63) has a circular annular portion (63a) and a plurality of magnetic poles (63b) protruding from the inner surface of the annular portion (63a) toward the center of the annular portion (63a).

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