Wire winding method

Abstract

A wire rod winding method for winding a wire rod (12) fed from the tip of a nozzle (11) around a magnetic pole (13b, 63b) by a combination of swinging of the magnetic pole (13b, 63b) with a central axis (O) of a stator core (13, 63) as a rotation center and relative movement of the nozzle (11) in the axial direction of the stator core (13, 63) with respect to a groove (13c, 63c) between the magnetic poles, the wire rod (12) being wound around the magnetic pole (13b, 63b), when the magnetic poles (13b, 63b) swing, the nozzle (11) is moved in the radial direction of the stator cores (13, 63), so that the front end of the nozzle (11) for feeding the wire (12) is linearly and relatively moved in the width direction of the magnetic poles (13b, 63b).

Description

Technical Field

[0001] The present invention relates to a wire winding method for winding a wire material fed from a nozzle around a magnetic pole. Background Art

[0002] Conventionally, the stator of an inner rotor type motor is formed by winding wire around a plurality of magnetic poles protruding toward the inner circumference of a stator core formed by stacking a plurality of annular components, and the stator of an outer rotor type motor is formed by winding wire around a plurality of magnetic poles protruding radially from the outer circumference of the stator core.

[0003] As a winding device for each magnetic pole facing the stator core, the applicant proposes a winding device comprising: a stator support unit, which supports the stator core in a manner capable of rotating about the central axis of the stator; and a moving mechanism, which moves the nozzle in each of the three-axis directions (for example, refer to Japanese Patent Gazette No. 10-271774).

[0004] The winding device combines the rotation of the stator core and the axial movement of the nozzle that delivers the wire, so that the front end of the nozzle, which is the wire delivery end, moves in a circle around the magnetic pole so that the wire delivered from the front end is wound around the magnetic pole. By precisely controlling the rotation of the stator core and the axial movement of the nozzle, a stator with wire neatly wound around each magnetic pole can be obtained. Summary of the invention

[0005] However, if Fig.10 As shown by the solid arrow and the dotted arrow, when the stator core 3 is rotated, the magnetic pole 3b protruding in the radial direction of the stator core 3 will perform an arc motion. Therefore, when the stator core 3 is rotated to make the wire 2 sent out from the front end of the nozzle 1 be wound around the magnetic pole 3b, the front end of the nozzle 1 moves relatively in an arc shape with respect to the magnetic pole 3b, and the wire 2 sent out from the front end of the nozzle 1 will be wound around the magnetic pole 3b in an arc shape.

[0006] The wire 2 fed from the front end of the nozzle 1 that moves in an arc shape relative to the magnetic pole 3b is wound with an arc-shaped wrinkle, so there is a tendency for the tension of the wire 2 wound on the magnetic pole 3b to be biased. Such a tension deviation prevents the wire 2 from being neatly wound on the magnetic pole 3b, and as a result, it is difficult to increase the space factor of the wire 2 relative to the magnetic pole 3b.

[0007] An object of the present invention is to wind a wire rod around a magnetic pole of a stator core with high precision to increase the space factor of the wire rod relative to the magnetic pole.

[0008] According to one aspect of the present invention, a wire winding method is provided, wherein the front end of the nozzle is caused to orbit around the magnetic poles through a combination of the swinging of magnetic poles with the central axis of the stator core as the rotation center and the relative movement of the nozzle along the axial direction of the stator core relative to the slots between the magnetic poles, so that the wire fed out from the front end of the nozzle is wound around the magnetic poles, wherein the front end of the nozzle that feeds out the wire is caused to move relatively in a straight line along the width direction of the magnetic poles by moving the nozzle along the radial direction of the stator core when the magnetic poles swing. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 1 is a diagram showing a winding method according to a first embodiment of the present invention, Figure 4 Cross-sectional view of line AA.

[0010] Figure 2 is a diagram showing the movement of the nozzle relative to the magnetic pole.

[0011] Figure 3 This is a diagram of an outer rotor type stator in which a wire is wound around a magnetic pole, as viewed from the axial direction.

[0012] Figure 4 It is a front view of the winding device which can implement the winding method of the 1st embodiment of this invention.

[0013] Figure 5 It is a figure which shows the winding method which concerns on the 2nd Embodiment of this invention.

[0014] Figure 6 is a diagram showing the movement of the nozzle relative to the magnetic pole.

[0015] Figure 7 This is a diagram of an inner rotor type stator as viewed from the axial direction.

[0016] Figure 8 It is a perspective view showing a winding device capable of implementing a winding method according to a second embodiment of the present invention.

[0017] Fig. 9 is along Figure 8 Cross-sectional view of line BB.

[0018] Fig.10 is a diagram showing a conventional winding method. Figure 1 The corresponding figure. DETAILED DESCRIPTION

[0019] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0020] <First Embodiment>

[0021] First, refer to Figures 1 to 4A first embodiment will be described. Figure 4 A winding device 10 capable of implementing the winding method of the first embodiment is illustrated. Figure 4 In the figure, three axes X, Y and Z that are orthogonal to each other are set, the X axis extends in a roughly horizontal lateral direction, the Y axis extends in a roughly horizontal front-to-back direction, and the Z axis extends in a vertical direction, and the winding device 10 is described.

[0022] The winding device 10 is used to wind the wire 12 fed from the nozzle 11 around the magnetic pole 13b of the stator core 13. Figure 3 As shown, the stator core 13 in the first embodiment is of an outer rotor type, and includes: a circular annular portion 13 a; and a plurality of magnetic poles 13 b radially protruding outward from the outer peripheral surface of the annular portion 13 a.

[0023] like Figure 4 As shown, the winding device 10 includes: a support 18 that supports the stator core 13 on the upper surface of the base 14; and a swing servo motor 19 that rotates the support 18. The servo motor 19 is mounted on the upper surface of the base 14 with the rotation axis 19a facing upward in the Z-axis direction. On the upper surface of the base 14, a mounting plate 21 is vertically provided offset from the servo motor 19 in the Y-axis direction.

[0024] The support member 18 supporting the stator core 13 includes: a rod-shaped core material 18a extending in the vertical direction along the upper edge of the stator core 13 placed horizontally; and a pressing member 18b pressing the stator core 13 placed on the upper edge of the core material 18a from above. The lower part of the core material 18a is attached to the rotating shaft 19a of the servo motor 19, and the upper part of the core material 18a is formed into an annular portion 13a (see FIG. 1 ) having an outer diameter greater than that of the stator core 13. Figure 3 ) has a slightly smaller outer diameter.

[0025] A linear motion guide rail 23 is mounted on the side of the mounting plate 21 facing the servo motor 19 so as to extend in the vertical direction. A lifting member 22 is mounted on the guide rail 23 so as to be movable up and down. The pressing member 18b is mounted on the lifting member 22 so that the central vertical axis coincides with the central axis of the core material 18a and the pressing member 18b can rotate around the vertical axis as the rotation center. A lifting cylinder 24 is provided above the lifting member 22 on the mounting plate 21 so as to lift and lower the lifting member 22 together with the pressing member 18b.

[0026] The lower portion of the pressing member 18b pressing the stator core 13 placed on the upper edge of the core material 18a from above has an outer diameter slightly smaller than that of the annular portion 13a of the stator core 13. The annular portion 13a of the stator core 13 is sandwiched between the core material 18a and the pressing member 18b.

[0027] The lower end of the core material 18a is attached to the rotating shaft 19a of the servo motor 19, so when the rotating shaft 19a of the servo motor 19 rotates, the core material 18a rotates together with the rotating shaft 19a. As a result, the stator core 13 sandwiched by the core material 18a and the pressing member 18b rotates around the central axis of the support 18 composed of the core material 18a and the pressing member 18b.

[0028] The stator core 13 is placed on the upper edge of the core material 18 a so that its center coincides with the central axis of the support 18 and is sandwiched by the pressing members 18 b . Therefore, the magnetic poles 13 b around the stator core 13 swing as the stator core 13 rotates.

[0029] The winding device 10 further includes: a nozzle 11 that feeds out the wire 12; and a nozzle moving mechanism 30 that moves the nozzle 11. The nozzle moving mechanism 30 includes: a front-rear direction driving unit 31 that is disposed on the upper surface of the base 14 adjacent to the servo motor 19 as the stator core actuating mechanism and moves the nozzle 11 in the X direction; and a vertical direction driving unit 32 that moves the nozzle 11 parallel to the central axis of the stator core 13.

[0030] The front-to-back direction driving unit 31 includes: a front-to-back direction guide 31a, which is arranged on the base 14 along the X-axis serving as the driving direction; a front-to-back direction rotating shaft 31b, which is arranged parallel to the front-to-back direction guide 31a and has a spiral external thread on the outer peripheral surface; a front-to-back direction moving component 31d, which is threadedly engaged with the front-to-back direction rotating shaft 31b through a ball screw and can move along the front-to-back direction guide 31a through the rotation of the front-to-back direction rotating shaft 31b; and a front-to-back direction driving source 31c, which rotationally drives the front-to-back direction rotating shaft 31b.

[0031] The front-rear direction driving source 31c in the first embodiment is a servo motor capable of high-precision control. The vertical direction driving unit 32 is attached to the front-rear direction moving member 31d that is driven and moved by the front-rear direction driving source 31c.

[0032] The vertical direction driving unit 32 includes: a vertical direction guide 32a, which is erected on the front-rear direction moving component 31d along the Z axis as the driving direction; a vertical direction rotating shaft 32b, which is arranged parallel to the vertical direction guide 32a and has a spiral external thread on the outer peripheral surface; a vertical direction moving component 32d, which is screwed with the vertical direction rotating shaft 32b through a ball screw and can move along the vertical direction guide 32a through the rotation of the vertical direction rotating shaft 32b; and a vertical direction driving source 32c, which drives the vertical direction rotating shaft 32b to rotate.

[0033] The vertical direction driving source 32c in the first embodiment is also a servo motor capable of high-precision control. A movable table 33 is mounted on the vertical direction moving member 32d driven and moved by the vertical direction driving source 32c. An extension plate 34 extending in the Y-axis direction is fixed to the movable table 33, and a nozzle 11 extending in the X-axis direction is fixed to the extension plate 34.

[0034] The nozzle 11 includes a large diameter portion 11a fixed to the extension plate 34 and a small diameter portion 11b provided continuously with the large diameter portion 11a. Figure 1 As shown, the small diameter portion 11b is coaxially arranged with the large diameter portion 11a, and is formed to have an outer diameter that can enter the slot 13c between adjacent magnetic poles 13b of the stator core 13. A through hole through which the wire 12 can be inserted is provided at the center axis of the large diameter portion 11a and the small diameter portion 11b, and the wire 12 inserted in the through hole can be sent out from the front end of the small diameter portion 11b.

[0035] Next, a winding method according to the first embodiment using the winding device 10 will be described.

[0036] First, the front-to-back direction driving unit 31 causes the front-to-back direction moving member 31d to move together with the vertical direction driving unit 32 as shown in FIG. Figure 4 As shown by the solid arrow, the stator core 13 is separated from the support 18. In this state, the support 18 supports the stator core 13.

[0037] Specifically, the rod 24a of the lifting cylinder 24 is withdrawn to raise the lifting member 22 as indicated by the dashed arrow, thereby raising the pressing member 18b mounted on the lifting member 22 to form a space between the pressing member 18b and the core material 18a. In this space, the stator core 13 is horizontally placed on the upper edge of the core material 18a.

[0038] Then, the rod 24a of the lifting cylinder 24 is advanced to lower the lifting member 22 as indicated by the double-dashed arrow, thereby lowering the pressing member 18b. Figure 4 As shown in FIG. 1 , the stator core 13 placed on the upper edge of the core material 18a is pressed from above by the pressing member 18b. Then, the front-to-back direction driving unit 31 causes the front-to-back direction moving member 31d to move together with the vertical direction driving unit 32 and the nozzle 11 as shown in FIG. Figure 4 As shown by the dotted arrow, it approaches the stator core 13.

[0039] Next, the end of the wire 12 fed from the front end of the nozzle 11 is tied and fixed to a tying pin or a wire clamping device (not shown). The above is the preparation process before winding. Next, winding is performed.

[0040] like Figure 2As shown, the winding method of the first embodiment combines the swing of the magnetic pole 13b and the movement of the nozzle 11 toward the axial direction (the direction of the central axis O) of the stator core 13 in the slot 13c between the adjacent magnetic poles 13b, so that the front end of the nozzle 11 circulates around the magnetic pole 13b, as shown in FIG. Figure 1 As shown in FIG. 1 , the wire 12 fed from the front end of the nozzle 11 is wound around the magnetic pole 13 b. This will be described in detail below.

[0041] exist Figure 4 In the winding device 10, first, the nozzle 11 is brought close to the stator core 13 by the front-rear direction driving unit 31, as shown in FIG. Figure 2 As shown in FIG. 1 , the front end of the nozzle 11, i.e., the front end of the small diameter portion 11b as the wire feeding end, faces or enters the slot 13c formed between the adjacent magnetic poles 13b of the stator core 13. At this time, the nozzle 11 is arranged along the radial direction of the stator core 13 as the axial direction of the magnetic pole 13b (refer to FIG. 1 ). Figure 1 Specifically, the nozzle 11 is configured such that the axial direction of the nozzle 11 is consistent with the radial direction of the stator core 13. That is, the nozzle 11 is configured such that the central axis of the nozzle 11 passes through the central axis O of the stator core 13.

[0042] In addition, the relative movement of the nozzle 11 in the axial direction of the stator core 13 is performed by moving the nozzle 11 in the Z-axis direction by the vertical direction driving unit 32. In this way, when the front end of the nozzle 11 is located in the slot 13c sandwiched by the magnetic pole 13b for winding and the magnetic pole 13b adjacent to one side thereof, the magnetic pole 13b is not swung by the servo motor 19, and only the nozzle 11 is moved in the axial direction of the stator core 13.

[0043] On the other hand, Figure 2 As shown, the swinging of the magnetic pole 13b with the central axis O of the stator core 13 as the rotation center starts when the front end of the nozzle 11 is out of the slot 13c, and ends when the front end of the nozzle 11 faces the slot 13c sandwiched by the magnetic pole 13b being wound and the magnetic pole 13b adjacent to the other side.

[0044] By repeating the movement of the nozzle 11 and the swing of the magnetic pole 13b alternately, the nozzle 11 moves relatively around the magnetic pole 13b along the cross-sectional shape of the magnetic pole 13b. As a result, the wire 12 fed from the front end of the nozzle 11 is wound around the magnetic pole 13b.

[0045] In this first embodiment, if Figure 1 As shown, by moving the nozzle 11 in the radial direction of the stator core 13 when the magnetic pole 13b swings, the tip of the nozzle 11 for feeding the wire 12 moves linearly relative to the magnetic pole 13b in the width direction of the magnetic pole 13b.

[0046] That is, the swing of the winding magnetic pole 13b is performed by rotating the stator core 13 with its central axis as the rotation center. Fig.10 As shown, when the magnetic pole 13b is swung while the nozzle 11 is fixed, the tip of the nozzle 11 that feeds the wire 12 draws an arc-shaped trajectory relative to the magnetic pole 13b and moves relatively in the circumferential direction of the stator core 13.

[0047] In contrast, in the winding method of the first embodiment, the tip of the nozzle 11 is moved linearly relative to the magnetic pole 13b in the width direction (swinging direction) of the magnetic pole 13b by reciprocating the nozzle 11 in the radial direction (X-axis direction) of the stator core 13 by an amount corresponding to the radial deviation of the stator core 13 caused by the circular arc relative movement of the tip of the nozzle 11 in the swinging direction on the wire 12 wound on the magnetic pole 13b. That is, in the conventional winding method, when the magnetic pole 13b swings, the tip of the nozzle 11 draws a trajectory of circular arc relative movement relative to the magnetic pole 13b, while in the winding method of the first embodiment, when the magnetic pole 13b swings, the tip of the nozzle 11 draws a trajectory of linear relative movement relative to the magnetic pole 13b in the width direction of the magnetic pole 13b. This will be described in detail below.

[0048] The tip of the nozzle 11 is released from the groove 13c. Figure 1 (a) The magnetic pole 13b starts to swing. When the magnetic pole 13b starts to swing, the distance between the tip of the nozzle 11 and the central axis O of the stator core 13 is set to L ( Figure 1 (a)). When the magnetic pole 13b swings, as shown in Figure 1 As shown in (b), the nozzle 11 is gradually brought close to the rotation center of the magnetic pole 13b (the central axis O of the stator core 13) until the tip of the nozzle 11 reaches the center of the width direction of the magnetic pole 13b. That is, the nozzle 11 is brought close to the central axis O of the stator core 13 during the period from the start of the swing of the magnetic pole 13b to the tip of the nozzle 11 reaching the center of the width direction of the magnetic pole 13b. The movement amount for bringing the nozzle 11 close to the central axis O of the stator core 13 is A.

[0049] When the magnetic pole 13b swings, after the front end of the nozzle 11 reaches the center of the width direction of the magnetic pole 13b, as shown in FIG. Figure 1As shown in (c), the nozzle 11 is gradually moved away from the rotation center of the magnetic pole 13b (the central axis O of the stator core 13) until the front end of the nozzle 11 faces the magnetic pole 13b for winding and the slot 13c between the magnetic pole 13b adjacent to the other side thereof ends. That is, during the period from when the front end of the nozzle 11 reaches the center in the width direction of the magnetic pole 13b to when the swing ends, the nozzle 11 is moved away from the central axis O of the stator core 13. The amount of movement of the nozzle 11 away from the central axis O of the stator core 13 is A, which is the same as the amount of movement of the nozzle 11 close to the central axis O of the stator core 13. That is, when the magnetic pole 13b swings, the nozzle 11 is moved back and forth in the radial direction of the stator core 13 by an amount A. Therefore, at the end of the swing of the magnetic pole 13b ( Figure 1 (c) shows the state), the distance between the front end of the nozzle 11 and the central axis O of the stator core 13 becomes L, which is consistent with the distance between the front end of the nozzle 11 and the central axis O of the stator core 13 when the swing of the magnetic pole 13b starts.

[0050] As described above, when the magnetic pole 13b swings, the nozzle 11 is brought close to the central axis O of the stator core 13 until the front end of the nozzle 11 reaches the center of the width direction of the magnetic pole 13b, and after the front end of the nozzle 11 reaches the center of the width direction of the magnetic pole 13b, the nozzle 11 is moved away from the central axis O of the stator core 13.

[0051] Regarding the movement amount A of the nozzle 11, when the swing angle of the magnetic pole 13b is set to θ and the distance between the front end of the nozzle 11 and the central axis O of the stator core 13 when the swing of the magnetic pole 13b starts is set to L, A=L(1-COSθ). By setting the movement amount A of the nozzle 11 in this way, the trajectory of the front end of the nozzle 11 when the magnetic pole 13b swings can be made to move relatively in a straight line along the width direction of the magnetic pole 13b.

[0052] When the front end of the nozzle 11 is moved linearly along the width direction of the magnetic pole 13b in this way, the wire 12 fed from the nozzle 11 is guided and wound straightly along the width direction of the magnetic pole 13b. Figure 1 As shown, the wire 12 fed from the front end of the nozzle 11 can be wound linearly around the magnetic pole 13b without generating arc-shaped wrinkles. Thus, the tension of the wire 12 wound around the magnetic pole 13b is prevented from being uneven, so that the wire 12 can be prevented from being wound randomly.

[0053] In order to neatly wind the wire 12 around the magnetic pole 13b, the nozzle 11 needs to be moved in a circular motion around the magnetic pole 13b, and each time the wire 12 is wound around once (one turn of the nozzle 11), the nozzle 11 needs to be moved in the X-axis direction by the front-back direction driving unit 31 relative to the circular position of the magnetic pole 13b by an amount corresponding to the diameter of the wire 12. The movement of the circular 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 swings (reciprocating movement of the movement amount A).

[0054] Even when the annular position of the nozzle 11 is moved axially along the magnetic pole 13b by an amount corresponding to the diameter of the wire 12, when the magnetic pole 13b swings, the nozzle 11 will reciprocate radially along the stator core 13, causing the front end of the nozzle 11 to move linearly relative to the magnetic pole 13b along the width direction of the magnetic pole 13b.

[0055] Thus, even when the circular position of the nozzle 11 is offset by an amount corresponding to the diameter of the wire 12, the wire 12 fed from the front end of the nozzle 11 can be wound linearly around the magnetic pole 13b without generating arc-shaped wrinkles, thereby avoiding random winding of the wire 12. By repeating such a circular movement of the nozzle 11, the wire 12 can be neatly wound around the magnetic pole 13b with high precision, thereby increasing the space factor of the wire 12 in the magnetic pole 13b.

[0056] All the magnetic poles 13b are wound in this way, such as Figure 3 As shown, after winding around all the magnetic poles 13b is completed, the stator core 13 is removed from the support member 18, and a series of winding operations are completed.

[0057] <Second Embodiment>

[0058] Next, refer to Figures 5 to 9 In the second embodiment, the same reference numerals as those in the first embodiment denote the same structures as those in the first embodiment, and the description thereof will be omitted.

[0059] like Figure 7 As shown, the stator core 63 in the second embodiment is an inner rotor type, and includes: a circular annular portion 63a; and a plurality of magnetic poles 63b protruding from the inner circumference of the annular portion 63a toward the center of the annular portion 63a.

[0060] Figure 8The winding device 60 for winding a wire around the magnetic pole 63b of the inner rotor type stator core 63 is shown. A support device 68 for carrying the stator core 63 is provided on the base 14 of the winding device 60. The support device 68 includes: a fixed table 68a, which is provided on the base 14; a rotating table 68b, which is mounted on the fixed table 68a so as to be rotatable in a horizontal plane and can carry and fix the stator core 63 on the upper side; and a swing servo motor (not shown) which rotates the rotating table 68b.

[0061] The winding device 60 includes: a base 14 provided with a support device 68; and a driving mechanism 70 as a driving unit, which is provided on the base 14 and drives the nozzle 11 in three-axis directions. The driving mechanism 70 is composed of a combination of driving parts 71, 72, and 73 in three-axis directions, and has a front-back direction driving part 71, a left-right direction driving part 72, and a top-bottom direction driving part 73. The driving parts 71, 72, and 73 are respectively provided in the X-axis direction, the Y-axis direction, and the Z-axis direction, and are substantially the same driving mechanisms.

[0062] The up-down direction driving part 73 comprises: an up-down direction guide 73a, which is arranged along the Z-axis direction; an up-down direction rotating shaft 73b, which is arranged parallel to the up-down direction guide 73a and has an external thread on the outer peripheral surface; an up-down direction moving part 73c, which is screwed with the up-down direction rotating shaft 73b through a ball screw and can move along the up-down direction guide 73a; an up-down direction connecting part 73d, which is connected to the up-down direction moving part 73c; and an up-down direction driving source 73e, which drives the up-down direction rotating shaft 73b to rotate.

[0063] The structures of the front-rear direction driving unit 71 and the left-right direction driving unit 72 are the same as those of the up-down direction driving unit 73. The front-rear direction driving unit 71 is provided on the base 14 and has a front-rear direction driving source 71e. The left-right direction driving unit 72 can move in the front-rear direction via the front-rear direction connecting portion 71d.

[0064] The horizontal direction driving unit 72 has a horizontal direction driving source 72e. The vertical direction driving unit 73 can move in the horizontal direction via the horizontal direction connecting portion 72d. As the driving sources 71e, 72e, and 73e, for example, servo motors capable of high-precision control are used.

[0065] A movable table 64 is mounted at the front end of the vertical connection portion 73d of the vertical drive portion 73, and the movable table 64 is parallel to the axial direction of the stator core 63 supported by the support device 68. The lower portion of the movable table 64 is formed in a rod shape that can be inserted into the stator core 63, and the nozzle 11 is fixed near the lower end of the movable table 64 along the X-axis direction.

[0066] like Fig. 9As shown, a first pulley 76 for turning the wire 12 is provided on the movable table 64. In addition, a through hole 73f for inserting the wire 12 is formed on the vertical connection portion 73d, and a second pulley 77 for turning the wire 12 is provided. The wire 12 is inserted through the through hole 73f, turned and guided to the nozzle 11 by the second pulley 77 and the first pulley 76, inserted into the nozzle 11 and sent out from the front end of the nozzle 11.

[0067] Next, a winding method according to the present embodiment using the winding device 60 will be described.

[0068] When the winding device 60 is used for winding, first, the wire 12 is inserted into the nozzle 11 and sent out from the front end of the nozzle 11. Then, the end of the wire 12 sent out from the front end of the nozzle 11 is tied and fixed to a tying pin or a wire clamping device (not shown). Then, the driving mechanism 70 is driven, as shown in FIG. Fig. 9 As shown in FIG. 1 , the horizontally arranged nozzle 11 is moved toward the magnetic pole 63b on the stator core 63 where the winding is performed and the slot 63c between the magnetic pole 63b adjacent thereto. At this time, the nozzle 11 is arranged along the radial direction of the stator core 63, which is the axial direction of the magnetic pole 63b. Specifically, the nozzle 11 is arranged so that the axial direction of the nozzle 11 is consistent with the radial direction of the stator core 63. That is, the nozzle 11 is arranged so that the central axis of the nozzle 11 passes through the central axis O of the stator core 63.

[0069] The winding method of the second embodiment reciprocates the nozzle 11 along the Z-axis direction by the driving mechanism 70, and rotates the rotating table 68b forward and reversely by the servo motor of the support device 68 to swing the magnetic pole 63b. Figure 6 As shown, the nozzle 11 is relatively moved around the magnetic pole 63b along the cross-sectional shape of the magnetic pole 63b.

[0070] The movement of the nozzle 11 along the Z-axis direction is performed by the following action: when the front end of the nozzle 11 is located in the groove 63c between the magnetic pole 63b for winding and the magnetic pole 63b adjacent to one side thereof, the swing of the magnetic pole 63b caused by the servo motor will not take place, and the nozzle 11 will only be lowered or raised.

[0071] After the tip of the nozzle 11 is released from the slot 63c, the magnetic pole 63b starts to swing, and the swing ends when the tip of the nozzle 11 is located below or above the slot 63c between the magnetic pole 63b for winding and the magnetic pole 63b adjacent to the other side. The magnetic pole 63b swings by rotating the stator core 63, and the rotation of the stator core 63 is performed by the servo motor in the support device 68.

[0072] By repeating such movement of the nozzle 11 and the swing of the magnetic pole 63b caused by the rotation of the stator core 63 alternately, Figure 6 As shown by the arrow, the nozzle 11 is relatively moved around the magnetic pole 63b along the cross-sectional shape of the magnetic pole 63b.

[0073] In this second embodiment, if Figure 5 As shown, by moving the nozzle 11 in the radial direction of the stator core 63 when the magnetic pole 63b swings, the tip of the nozzle 11 that feeds the wire 12 moves linearly relative to the magnetic pole 63b in the width direction of the magnetic pole 63b.

[0074] That is, the oscillation of the magnetic pole 63b for winding is performed by rotating the stator core 13 about its central axis O as the rotation center. Fig.10 As shown, when the magnetic pole 63b is swung while the nozzle 11 is fixed, the tip of the nozzle 11 that feeds the wire 12 draws an arc-shaped trajectory relative to the magnetic pole 63b and moves relatively in the circumferential direction of the stator core 63.

[0075] In contrast, in the winding method of the second embodiment, as in the above-mentioned first embodiment, the nozzle 11 is reciprocated by an amount in the radial direction (X-axis direction) of the stator core 63, so that the front end of the nozzle 11 is linearly moved relative to the magnetic pole 63b along the width direction (swinging direction) of the magnetic pole 63b. This amount corresponds to the radial offset along the stator core 63 generated on the wire 12 wound on the magnetic pole 63b by the circular arc-shaped relative movement of the front end of the nozzle 11 along the swinging direction.

[0076] Specifically, the tip of the nozzle 11 is released from the groove 63c. Figure 5 (a) The magnetic pole 63b starts to swing. When the magnetic pole 63b starts to swing, the distance between the tip of the nozzle 11 and the central axis O of the stator core 63 is set to L ( Figure 5 (a)). When the magnetic pole 13b swings, as shown in Figure 5 As shown in (b), the nozzle 11 is brought close to the rotation center of the magnetic pole 63b (the central axis O of the stator core 63) until the tip of the nozzle 11 reaches the center of the width direction of the magnetic pole 63b. That is, the nozzle 11 is brought close to the central axis O of the stator core 63 during the period from the start of the swing of the magnetic pole 63b to the tip of the nozzle 11 reaching the center of the width direction of the magnetic pole 63b. The movement amount of the nozzle 11 to bring it close to the central axis O of the stator core 63 is A.

[0077] When the magnetic pole 63b swings, after the front end of the nozzle 11 reaches the center of the width direction of the magnetic pole 63b, as shown in FIG. Figure 5As shown in (c), the nozzle 11 is moved away from the rotation center of the magnetic pole 63b (the central axis O of the stator core 63) until the front end of the nozzle 11 faces the magnetic pole 63b for winding and the slot 63c between the magnetic pole 63b adjacent to the other side thereof ends its swing. That is, during the period from when the front end of the nozzle 11 reaches the center in the width direction of the magnetic pole 63b to when the swing ends, the nozzle 11 is moved away from the central axis O of the stator core 63. The amount of movement A that moves the nozzle 11 away from the central axis O of the stator core 63 is the same as the amount of movement that moves the nozzle 11 closer to the central axis O of the stator core 63. That is, when the magnetic pole 63b swings, the nozzle 11 is moved back and forth in the radial direction of the stator core 63 by an amount A. Therefore, when the swing of the magnetic pole 63b ends ( Figure 5 (c) shows the state), the distance between the front end of the nozzle 11 and the central axis O of the stator core 63 becomes L, which is consistent with the distance between the front end of the nozzle 11 and the central axis O of the stator core 63 when the swing of the magnetic pole 63b starts.

[0078] As described above, when the magnetic pole 63b swings, the nozzle 11 is brought close to the central axis O of the stator core 63 until the front end of the nozzle 11 reaches the center of the width direction of the magnetic pole 63b, and after the front end of the nozzle 11 reaches the center of the width direction of the magnetic pole 63b, the nozzle 11 is moved away from the central axis O of the stator core 63.

[0079] The relationship between the movement amount A, the swing angle θ and the distance L is the same as that of the first embodiment. This allows the trajectory of the tip of the nozzle 11 to move linearly along the width direction of the magnetic pole 63b when the magnetic pole 63b swings.

[0080] When the front end of the nozzle 11 is moved linearly along the width direction of the magnetic pole 63b in this way, the wire 12 fed from the nozzle 11 is guided and wound straightly along the width direction of the magnetic pole 63b. Figure 5 As shown, the wire 12 fed from the front end of the nozzle 11 can be wound linearly around the magnetic pole 63b without generating arc-shaped wrinkles. Thus, the tension deviation of the wire 12 wound around the magnetic pole 63b is prevented, so that the wire 12 can be avoided from being wound randomly.

[0081] In order to neatly wind the wire 12 around the magnetic pole 63b, the nozzle 11 needs to be moved in a circular motion around the magnetic pole 63b, and each time the wire 12 is wound around once (one turn of the nozzle 11), the nozzle 11 needs to be moved in the X-axis direction relative to the circular position of the magnetic pole 63b by an amount corresponding to the diameter of the wire 12. The movement of the circular position of the nozzle 11 is performed separately from the reciprocating movement of the nozzle 11 in the X-axis direction (reciprocating movement of the movement amount A) when the magnetic pole 63b swings.

[0082] Even when the annular position of the nozzle 11 has moved axially along the magnetic pole 63b by an amount corresponding to the diameter of the wire 12, when the magnetic pole 63b swings, the nozzle 11 will move back and forth radially along the stator core 63, causing the front end of the nozzle 11 to move linearly relative to the magnetic pole 63b along the width direction of the magnetic pole 63b.

[0083] Thus, even when the circular position of the nozzle 11 is offset by an amount corresponding to the diameter of the wire 12, the wire 12 fed from the front end of the nozzle 11 can be wound linearly around the magnetic pole 63b without generating arc-shaped wrinkles, thereby avoiding random winding of the wire 12. By repeating such a circular movement of the nozzle 11, the wire 12 can be neatly wound around the magnetic pole 63b with high precision, thereby increasing the space factor of the wire 12 in the magnetic pole 63b.

[0084] All the magnetic poles 63b are wound in this way, such as Figure 7 As shown, after the winding to all the magnetic poles 63b is completed, the stator core 63 is removed from the support device 68, and a series of winding operations are completed.

[0085] In the first and second embodiments, the case where the central axis O of the stator core 13, 63 is in the vertical direction and the wire 12 is wound around the magnetic poles 13b, 63b is described. However, this is an example, and the winding method of the wire 12 may also be such that the central axis O of the stator core 13, 63 is in the horizontal direction and the wire 12 is wound around the magnetic poles 13b, 63b.

[0086] In the first and second embodiments, the movement of the nozzle 11 in the slot 13c, 63c between the magnetic poles 13b, 63b in the axial direction of the stator core 13, 63 is performed by moving the nozzle 11 itself. However, the movement of the nozzle 11 in the slot 13c, 63c may be performed by moving the stator core 13, 63 in the axial direction. That is, it is sufficient if the nozzle 11 is relatively moved with respect to the slot 13c, 63c in the axial direction of the stator core 13, 63, and it is sufficient if one of the nozzle 11 and the stator core 13, 63 is moved.

[0087] As mentioned above, although the embodiment of the present invention has been described, the above embodiment merely shows an application example of the present invention, and the technical scope of the present invention is not limited to the specific structure of the above embodiment.

[0088] This application claims priority based on Japanese Patent Application No. 2022-109543 filed with the Japan Patent Office on July 7, 2022, and the entire contents of this application are incorporated into this specification by reference.

Claims

1. A wire winding method, wherein the front end of the nozzle is caused to circulate around the magnetic poles by a combination of swinging the magnetic poles with the central axis of the stator core as the rotation center and relative movement of the nozzle with respect to the slots between the magnetic poles along the axial direction of the stator core, so that the wire fed from the front end of the nozzle is wound around the magnetic poles, wherein: By moving the nozzle in the radial direction of the stator core when the magnetic pole swings, the tip of the nozzle that feeds out the wire is relatively moved linearly in the width direction of the magnetic pole.

2. The wire winding method according to claim 1, wherein: The nozzle is arranged along the radial direction of the stator core. When the magnetic pole swings, the nozzle is brought close to the central axis of the stator core until the front end of the nozzle reaches the center of the width direction of the magnetic pole, and after the front end of the nozzle reaches the center of the width direction of the magnetic pole, the nozzle is moved away from the central axis of the stator core.

3. The wire winding method according to claim 2, wherein: Regarding the movement amount A that brings the nozzle closer to the center axis of the stator core and the movement amount A that brings the nozzle away from the center axis of the stator core, when the swing angle of the magnetic pole is set to θ and the distance between the front end of the nozzle and the center axis of the stator core at the start of the swing of the magnetic pole is set to L, A=L(1-COSθ).

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