JP2000245121A - Winding device to stator core - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a winding device which winds a lead on the internal teeth of a stator core, aligning it in the radial direction. SOLUTION: To the tip of a lead-in cylinder 12, which is arranged coaxially at the center of a stator core, sways at a specified angle, and moves back and forth along the shaft, a head 15 is fitted. To this head 15, a nozzle 20 is fitted capable of appearing in the radial direction. A cam board 21 is arranged rotatably in the head, and a cam follower provided in the base part of the nozzle is fitted into into its cam groove. A belt 74 is stretched among a main drive pulley 41 fitted to a shaft which interlocks with the cylinder 12, a cam board rotating pulley 40 which interlocks with the cam board, at least a pair of movable pulleys 61 which are moved by a motor 51, and so on, and idle pulleys 70, 72, 73 arranged among them as necessary. The movable pulleys are moved and the cam board rotating pulley, the cam board are rotated relatively to the leading-in cylinder, and the nozzle is caused to appear in the radial direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding device for a stator core in which a conductor is directly wound around inner teeth of a stator core to form a coil.

[0002]

2. Description of the Related Art In general, a winding device for forming a coil by directly winding on the inner teeth of a stator core is coaxially arranged at the center of the stator core, swings at a predetermined angle and reciprocates in the axial direction. The lead-in tube is provided with a nozzle attached to the leading end of the lead-in tube to feed the lead in a direction substantially orthogonal to the lead-in tube. Then, the tip of the nozzle is caused to orbit around the internal teeth of the stator core to be wound by the movement of the conductive wire introducing cylinder, and the conductive wire fed from the nozzle is directly wound around the internal teeth to form a coil.

FIG. 6 is a plan view of the above winding device. In the drawing, reference numeral 1 denotes a stator core having a slot 1a and internal teeth 1b on the inner periphery thereof. Reference numeral 2 denotes a head mounted on the upper end of the lead-in tube, and reference numeral 3 denotes three nozzles mounted at right angles and radially to the lead-in tube via the head 2. By the above-described operation of the lead wire introducing cylinder, the head 2 swings as shown by an arrow A in the figure and reciprocates in a direction perpendicular to the paper surface (axial direction of the stator core 1). Thereby, it goes in and out of two adjacent slots 1a,
It moves so that it may go around the internal teeth 1b between them, and winds a conducting wire around the internal teeth 1b.

In such a series winding type winding device, in order to increase the number of windings of the conductor as much as possible and to increase the space factor of the conductor entering the slot, the winding is uniformly performed along the radial direction of the internal teeth of the stator core. The conductor must be wound. That is, FIG. 7 shows the internal teeth 1 b of the stator core 1.
2 shows a state in which the conductor W is ideally wound so as to maximize the space factor in the slot 1a. In the figure, reference numeral 4 denotes a slot liner made of an insulating sheet. As described above, in order to ideally wind the conductor W, it is desirable that the conductor W be aligned and wound from the front to the back of the slot 1a, and that the number of stacked stages of the conductor W be increased toward the back. Note that a predetermined gap t is required between the nozzle 3 and the conductive wire W wound on the uppermost portion.

Conventionally, a conductor W is connected to the internal teeth 1b of the stator core 1.
FIG.
The ones shown in Table 1 were common. That is, the stator core 1 is located close to both end faces of the internal teeth 1b of the stator core 1 and
The guide rod 6 extends in the radial direction of the guide rod 6 and guides the winding position of the conductor W so as to slide down the conductor W along the tapered surface 6a provided at the tip of the guide rod 6. This is a device in which the winding position of the conductive wire W is gradually shifted by gradually moving forward and backward in the radial direction as shown by the middle arrow B, so that the inner tooth 1b is uniformly wound in the radial direction. Note that reference numeral 5 in the figure denotes a conductor introducing tube.

Further, as another device for uniformly winding a conductive wire along the radial direction of the internal teeth of the stator core, there is also known a device in which a protruding length of a nozzle with respect to a conductive wire introducing cylinder is gradually changed. I have.

For example, JP-A-61-266050 discloses that
The lead wire introduction tube is composed of multiple tubes, a gear is provided at the upper end of the center shaft, and a rack formed at the base end of the nozzle is meshed with another gear that meshes with this gear. Separately from the movement for the winding, by rotating the center cylinder and moving the nozzle in the radial direction via the gear and the rack, the winding position of the internal teeth in the radial direction is gradually increased. Displaced devices are disclosed.

In Japanese Unexamined Utility Model Publication Nos. 61-27474 and 61-41378, a nozzle arm is pivotably attached to the upper end of a lead wire introducing cylinder, and a nozzle for feeding a lead wire is attached to the upper end of the nozzle arm. The lower end of the nozzle arm is urged by a spring to press the cam against the cam, and the cam is rotated at a predetermined speed to swing the nozzle arm, thereby causing the nozzle to advance and retreat in the radial direction, and A device in which the winding position in the direction is gradually shifted is disclosed.

[0009]

In the conventional winding apparatus using the guide rod 6 shown in FIG.
When the conductive wire W is to be wound around the distal end side of b (the front side of the slot 1a), the guide rod 6 is advanced radially inward of the stay core 1 so that the distal end is located at the distal end of the internal teeth 1b. So that However, when the nozzle 3 is in the slot 1a
When passing through the inside, since the tip of the nozzle is located at the back of the slot 1a as shown by the imaginary line 3a in the figure, the conductor W is obliquely pulled from the tip of the guide rod 6 to the back of the slot 1a. As a result, location of wire W is wound slipped from the tip of the guide rod 6, as shown in the figure W _1, it becomes deeper slots 1a than the tip portion of the internal 1b. Further, when the nozzle 3 passes through the slot 1a, the conducting wire W is separated from the guide rod 6 and is not guided, so that it is difficult to accurately align the conductive wire W along the projecting direction of the internal teeth 1b. Therefore, the conventional winding device shown in FIG. 8 cannot sufficiently increase the space factor.

[0010] Further, the nozzle inserted in the center of the electric wire introduction tube disclosed in Japanese Patent Application Laid-Open No. 61-266050 is independently rotated so that the nozzle is made to protrude and retract in a radial direction via a gear and a rack. In the device, gears and racks must be built in the head of the wire introduction tube, it is difficult to make a size that can be applied to a small stator core, and the tube inserted through the center of the wire introduction tube Since it is necessary to rotate the nozzle independently, there is a problem that a driving mechanism for moving the nozzle forward and backward is complicated and the manufacturing cost is increased.

Further, in an apparatus disclosed in Japanese Utility Model Laid-Open No. 61-27474 and Japanese Utility Model Laid-Open No. 61-41378, in which the nozzle arm is swung by a cam to move the nozzle in the radial direction, the base of the nozzle arm is used. Since the end slides on the cam surface at high speed, noise during operation is loud, the cam surface is worn out and grooves are formed, parts must be replaced frequently, and the nozzle arm swings. Since the nozzle is moved in the radial direction, it is difficult to linearly change the moving position of the nozzle in the radial direction.

[0012] Accordingly, an object of the present invention is to make it possible to wind a conductive wire on the inner teeth of a stator core to be wound in a radially aligned manner as much as possible by moving the nozzle accurately in the radial direction. To provide a winding device for a stator core.

[0013]

In order to achieve the above object, a winding device for a stator core according to the present invention is arranged coaxially at the center of the stator core, swings at a predetermined angle, and reciprocates in the axial direction. A lead wire introducing cylinder, a head attached to the tip of the lead wire introducing cylinder, and a nozzle attached to the lead wire introducing cylinder via the head, and a nozzle for feeding the lead wire in a direction substantially orthogonal to the lead wire introducing cylinder. A winding device for a stator core, wherein the nozzle is made to circumscribe the inner teeth of the stator core by the operation of the wire introduction tube to wind the wire, wherein the nozzle slides in the radial direction with respect to the head. The cam follower is mounted at the base end thereof, and a cam plate having a cam groove into which the cam follower is fitted is rotatably built in the head. A cam plate rotating means for rotating the cam plate relative to the lead wire introducing cylinder, the cam plate rotating means being mounted on a rotating shaft interlocking with the lead wire introducing cylinder and the rotating shaft. A driving pulley, a cam plate rotating pulley that is rotatably mounted on the lead wire introducing cylinder and is interlocked with the cam plate, and at least one pair of movable parts that are moved by a driving means different from the driving means of the lead wire introducing cylinder. A pulley, and a belt stretched over the group of pulleys. The movable pulley moves so as not to change a belt path length around the group of pulleys. The length of the belt to the pulley,
The length of the belt from the cam plate rotating pulley to the driving pulley may be changed.

According to the present invention, when the rotating shaft rotates in conjunction with the lead wire introducing tube, the cam plate rotating pulley is connected to the lead wire via the driving pulley, the movable pulley, and the belt stretched over the cam plate rotating pulley. It rotates in synchronization with the introduction tube. Since the cam plate rotating pulley is interlocked with the cam plate, the cam plate also rotates in synchronization with the conductor introducing tube. Therefore, in a state where the movable pulley does not move, the cam plate rotates in synchronization with the wire introduction tube and does not rotate relative to the wire introduction tube, so that the nozzle does not move in the radial direction.

However, by moving the movable pulley, the length of the belt from the driving pulley to the cam plate rotating pulley and the length of the belt from the cam plate rotating pulley to the driving pulley are changed. Then, a deviation occurs between the rotation of the cam plate and the rotation of the wire introduction tube, and the cam plate relatively rotates with respect to the wire introduction tube.

That is, when the movable pulley moves, the length of the belt from the main driving pulley to the cam plate rotating pulley decreases in the belt running direction, and the cam plate rotating pulley moves from the cam plate rotating pulley to the driving pulley. If the length of the belt at the leading end becomes longer, the belt will advance more than the driving pulley, and the driving pulley will rotate more than the lead wire introducing cylinder, and the cam linked to the driving pulley will rotate. The plate is relatively rotated so as to advance with respect to the conductor introducing tube.

[0017] Also, by moving the movable pulley,
When the length of the belt from the driving pulley to the cam plate rotation pulley becomes longer and the length of the belt from the cam plate rotation pulley to the driving pulley becomes shorter when viewed in the running direction of the belt, Since the belt is returned by that amount with respect to the driving pulley, the driving pulley rotates less than the lead-in tube, and the cam plate linked to the driving pulley is relatively rotated so as to be delayed with respect to the lead-in tube. I do.

As described above, when the cam plate rotates relative to the lead wire introducing cylinder, the cam follower attached to the base end of the nozzle and fitted in the cam groove of the cam plate moves in the radial direction,
The nozzle moves radially. Since this movement is accurately and linearly performed by controlling the movement of the movable pulley, the conductor is radially aligned with the inner teeth of the stator core to be wound so that the space factor is increased as much as possible. Can be attached.

According to a preferred aspect of the present invention, the movable pulley is mounted at predetermined intervals on a slide plate which reciprocates in a direction intersecting a line connecting the driving pulley and the cam plate pulley. An idle pulley is disposed between each pulley composed of a pair of pulleys, the driving pulley, the cam plate rotating pulley, and the movable pulley, and a belt portion stretched between the movable pulley and the idle pulley is provided. , Parallel to the moving direction of the slide plate.

According to this, the moving amount of the slide plate and the moving amount of the belt due to this have a fixed relationship, and the belt path length around each pulley does not change even if the interval between the pair of movable pulleys is fixed. Therefore, the structure of the movable pulley is simplified, and the relative rotation control of the cam plate rotating pulley and the cam plate is also facilitated.

According to a further preferred aspect of the present invention, the slide plate is screwed and moved by a ball screw rotated by a rotation controllable motor.

According to this, the slide plate can be accurately moved via the ball screw by the motor whose rotation is controllable, and the movement of the nozzle in the radial direction is accurately controlled to more accurately align and wind the conductor. It becomes possible.

[0023]

1 to 5 show an embodiment of a winding device for a stator core according to the present invention. 1 is a perspective view of a main part of the winding device, FIG. 2 is a front sectional view showing a main part of the winding device, FIG. 3 is a plan view showing a main part of the winding device, and FIG. FIG. 5 is a sectional view taken along the line IV-IV of FIG. 2 and FIG. 5 is a sectional view taken along the line VV of FIG.

The winding device 11 has a conductor introduction tube 12 which is coaxially arranged at the center of the stator core and into which a conductor is introduced from the lower end. The lead wire introduction tube 12 is connected to the frame 1
3 is supported so as to be movable in the axial direction and rotatable. Below the frame 13, the conducting wire introduction tube 12 is swung (reciprocated rotation) at a predetermined angle as shown by an arrow A in FIG. 1 and is reciprocated in the axial direction as shown by an arrow B. Corresponding internal teeth 1b of stator core 1
A drive mechanism for orbiting around (see FIG. 5) is arranged. As such a driving mechanism, for example, a known driving mechanism as disclosed in Japanese Patent Application Laid-Open No. 8-251880 by the present applicant can be adopted.

A cylindrical head 15 is attached to the upper end of the lead wire introducing tube 12. The head 15 has a radially extending slot 16 in which a nozzle 20 is mounted so as to be slidable in the radial direction. Nozzle 2
Numeral 0 protrudes radially outward from three locations in the circumferential direction of the head 15 in this embodiment, so that winding is performed simultaneously on predetermined three internal teeth 1 b of the stator core 1.

The lower surface of the slot 16 of the head 15 is opened, and an annular cam plate 21 is rotatably mounted therein. As shown in FIG. 5, the cam plate 21 has three spiral cam grooves 22 corresponding to the respective slots 16. A cam follower 23 made of a roller fitted into the corresponding cam groove 22 is provided at the base end of each nozzle 20.
Is installed. Therefore, when the cam plate 21 rotates as shown by an arrow C in FIG. 5, the nozzle 20 advances and retreats in the radial direction via the cam follower 23 fitted into the spiral cam groove 22, and the internal teeth 1b of the stator core 1 Can be gradually moved.

With particular reference to FIGS.
Is connected to the upper end surface of a sleeve 24 surrounding the upper outer periphery of the wire introduction tube 12, and is configured to rotate integrally with the sleeve 24. The sleeve 24 is inserted through an upper rotary cylinder 25 rotatably held by the bearing block 30. The upper rotary cylinder 25 is configured to rotate integrally with the sleeve 24 while allowing the sleeve 24 to move in the axial direction by spline teeth 25a that fit into spline grooves 24a formed on the outer periphery of the lower portion of the sleeve 24. . A cam plate rotation pulley 40 is mounted on the outer periphery of the upper rotary cylinder 25.

A bearing block 31 is arranged opposite to the bearing block 30, and they are connected via a connecting plate 32. A support plate 33 is connected so as to intersect with the connection plate 32, and a plurality of legs 34 attached to the lower surface of the support plate 33 are fixed to the upper surface of the frame 13.

The bearing 14 fixed to the frame 13
, A lower rotating cylinder 34 is rotatably held, and the lead wire introducing cylinder 12 is inserted into and supported by the lower rotating cylinder 34. In this case, a spline groove 12 a is formed on the outer periphery of the lower part of the lead wire introducing cylinder 12, and the lower rotating cylinder 34 is formed.
The spline teeth 34a formed in the spline grooves 1
2a, the lead wire introducing cylinder 12 and the lower rotating cylinder 34 are supported by the bearing 14 and rotate integrally. A drive pulley 35 is mounted on the outer periphery of the lower rotary cylinder 34.

The sleeve 2 connected to the cam plate 21
4 is also inserted into the lower rotary cylinder 34, but does not fit in the rotational direction with the lower rotary cylinder 34,
The lower rotating cylinder 34 can be freely rotated.

On the other hand, the other bearing block 31 has:
A rotating shaft 36 is inserted and supported, and a driven pulley 37 is mounted at a lower end thereof. And the driving pulley 3
A first timing belt 38 is stretched between the driven pulley 5 and the driven pulley 37. As a result, the rotation shaft 36 is synchronized with the conductor introduction tube 12 via the driving pulley 35, the first timing belt 38 and the driven pulley 37 with the rotation of the lower rotation cylinder 34 that rotates integrally with the conductor introduction tube 12. It is designed to rotate. A driving pulley 41 is mounted on the upper end of the rotating shaft 36.

On the other hand, referring also to FIG.
Plates 42 and 43 are attached to both ends of 3 in parallel with each other, and a pair of guide rods 44 and
45 are installed in parallel. A slide plate 46 is disposed above the support plate 33.
The guide rods 44, 45 are inserted through a plurality of blocks 47 attached to the lower surface of the guide rod. Therefore, the slide plate 46 can move along the guide rods 44 and 45.

The bearing block 4 is provided on the support plate 33.
8, 49 are installed, and the bearing blocks 48, 4
9, a ball screw 50 is inserted and supported. The ball screw 50 is arranged parallel to the guide rods 44 and 45. The plate 43 is provided with a motor 51 such as a stepping motor that can be controlled to rotate. The drive shaft 52 of the motor 51 is connected to the ball screw 5 via a coupling 53.
Connected to 0.

Further, a block 54 is fixed at the center of the lower surface of the slide plate 46, and a nut 55 fixed and held by the block 54 is screwed to the ball screw 50. Therefore, when the motor 51 operates and the ball screw 50 rotates, the nut 5 screwed into the ball screw 50
The slide plate 46 moves along the guide rods 44 and 45 via 5.

As a drive mechanism of the slide plate 46, not only a mechanism using the ball screw 50 as described above, but also a drive mechanism using a rack and a pinion can be adopted.

A pair of movable pulleys 61 and 62 are mounted on the upper surface of the slide plate 46 at predetermined intervals. One of the movable pulleys 62 is mounted via a movable plate 63 screwed to the slide plate 46, and the distance between the movable pulleys 61 and 62 can be adjusted by shifting the position of the movable plate 63. Has become.

On the bearing blocks 30, 31, substantially triangular supporting plates 64, 65 are mounted. On these supporting plates 64, 65, idle pulleys 70, 7 are mounted.
1, 72 and 73 are installed.

The main pulley 41, idle pulley 70, movable pulley 62, idle pulley 71, pulley 40 for cam plate rotation, idle pulley 72, movable pulley 6
A second timing belt 74 is stretched over the above-described series of pulley groups including the idle pulley 1 and the idle pulley 73. The second timing belt 74 is stretched outside the main pulley 41, the movable pulley 62, the cam plate rotation pulley 40, and the movable pulley 61.
At 71, 72, and 73, they are stretched inside of them to form a cross as a whole.

In this case, at least the movable pulleys 61 and 6
Portions 74a, 74b, 74c, 74d stretched between the pulley 2 and the idle pulleys 70, 71, 72, 73 are parallel to the moving direction of the slide plate 46.
As a result, for example, when the slide plate 46 moves in the direction of arrow D in FIG. 3, the belt portions 74a and 74b become shorter, but the belt portions 74c and 74d become longer by the same length. Moves in the direction of arrow E in FIG. 3, the belt portions 74a and 74b become longer, but the belt portions 74c and 74d become shorter by the same length. Will not change. Therefore, the movable pulley 61,
Even if 62 moves in the direction of arrow D or E in FIG. 3 as the slide plate 46 moves, the second timing belt 74
It can rotate without being pulled or loosened.

The belt portions 74a, 74b, 7
Even if 4c and 74d are not parallel to the moving direction of the slide plate 46, for example, the distance between the movable pulleys 61 and 62 is made variable,
If the slide plate 46 is always urged in a direction away from each other by a spring or the like disposed between the two, the distance between the movable pulleys 61 and 62 changes according to the circumference of the second timing belt 74. The second timing belt 74 can rotate without being pulled or loosened.

The operation of the winding device 11 will now be described.
By swinging (reciprocating rotation) at a predetermined angle as shown by an arrow A in the middle, and by reciprocating in the axial direction as shown by an arrow B, the head 15 is attached to the upper end of the wire introduction tube 12 via a head 15. Each attached nozzle 20 orbits around the corresponding internal teeth 1 b of the stator core 1, and winds a wire passing through the inside of the wire introduction cylinder 12 and fed from the tip of the nozzle 20 around the internal teeth 1 b.

When the wire introduction tube 12 swings, the spline teeth 34a are inserted into the spline grooves 12a of the wire introduction tube 12.
, The lower rotary cylinder 34 fitted therewith rotates integrally. When the lower rotary cylinder 34 rotates, the rotary shaft 36 rotates via the driving pulley 35, the first timing belt 38, and the driven pulley 37. In addition, the driving pulley 4 of the rotating shaft 36
1, idle pulley 70, movable pulley 62, idle pulley 71, pulley 40 for cam plate rotation, idle pulley 7
2, a second timing belt 74 stretched over a series of pulleys consisting of a movable pulley 61 and an idle pulley 73
, The upper rotary cylinder 25 rotates. Then, the fitting of the spline teeth 25a of the upper rotary cylinder 25 and the splines 24a causes the sleeve 24 to rotate integrally. As a result, the slide plate 46 stops and the movable pulleys 61, 6
In a state in which the cam plate 21 does not move, the sleeve 24 connected to the cam plate 21 rotates in synchronization with the wire introduction tube 12, and relative rotation occurs between the cam plate 21 and the wire introduction tube 12 and the head 15. Absent. Therefore, the nozzle 20 maintains a state of protruding a predetermined length in the radial direction.

However, the motor 51 is operated according to a preset program, and the ball screw 50 and the nut 5 are operated.
5. When the slide plate 46 is moved in the direction of arrow D or E in FIG. 3 via the block 54, relative rotation between the cam plate 21 and the lead wire introduction tube 12 and the head 15 is performed by the following operation. appear. In the following description, the driving pulley 41 → the idle pulley 70 → the movable pulley 62 →
The path from the idle pulley 71 to the cam plate rotation pulley 40 is path I, and the path from the cam plate rotation pulley 40 → the idle pulley 72 → the movable pulley 61 → the idle pulley 73 → the driving pulley 41 is path II.

That is, when the slide plate 46 is moved in the direction of arrow D in FIG. 3, the belt portions 74a and 74b forming a part of the path I are shortened, and the belt parts 74c forming a part of the path II are shortened accordingly. , 74d become longer. For this reason,
The second timing belt 74 moves from the path I to the path II by the length described above, and rotates the cam plate rotating pulley 40 in the direction of arrow D '.

When the slide plate 46 is moved in the direction of arrow E in FIG.
The lengths a and 74b become longer, and the belt portions 74c and 74d forming a part of the path II become shorter accordingly. Therefore, the second timing belt 74 moves from the path II to the path I by the length described above, and rotates the cam plate rotating pulley 40 in the direction of the arrow E '.

The above rotation is performed in addition to the rotation synchronized with the wire introduction tube 12, and causes the cam plate rotating pulley 40 to rotate relative to the wire introduction tube 12. As a result, via the upper rotary cylinder 25 and the sleeve 24, the cam plate 21
It rotates relative to the conductor introduction tube 12 and the head 15.
As a result, the position of the cam groove 22 in which the cam follower 23 attached to the base of the nozzle 20 fits changes, and the nozzle 2
0 moves in the radial direction. Since the rotation angle of the cam plate 21 can be freely adjusted by the amount of movement of the slide plate 46, the movement of the nozzle 20 in the radial direction can be controlled by controlling the motor 51 at a predetermined timing linked with the winding operation. It can be performed with a predetermined moving amount.

Therefore, the stator core 1 shown in FIG.
In accordance with the winding operation on the internal teeth 1b, the amount of protrusion of the nozzle 20 in the radial direction is gradually changed, and the conductive wire is wound while being aligned along the longitudinal direction of the internal teeth 1b.
It is possible to apply a winding so as to maximize the space factor in the inside.

[0048]

As described above, according to the present invention,
Since the cam plate attached to the head is rotated at a predetermined angle, and the nozzle is moved in the radial direction of the stator core through a cam follower abutting on the cam groove,
The winding can be performed while gradually changing the winding position of the wire fed from the nozzle tip along the direction in which the internal teeth of the stator core project, whereby the wires can be aligned and wound.

Further, since the movement of the nozzle in the radial direction of the stator core can be set accurately by controlling the movement of the movable pulley so that an ideal winding in accordance with the shape of the slot of the stator core can be performed. For example, it is possible to apply a winding so as to obtain a maximum space factor as shown in FIG.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part showing an embodiment of a winding device for a stator core according to the present invention.

FIG. 2 is a front sectional view showing a main part of the winding device.

FIG. 3 is a plan view showing a main part of the winding device.

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3;

FIG. 5 is a sectional view taken along the line VV of FIG. 2;

FIG. 6 is a plan view showing a general structure of a winding device for a stator core.

FIG. 7 is a partial cross-sectional view showing a state where a conductive wire is wound around the inner teeth of the stator core so as to have the highest space factor.

FIG. 8 is an explanatory diagram showing an example of a conventional winding device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator core 1a Slot 1b Internal teeth 11 Winding device 12 Conductor introduction cylinder 14 Bearing 15 Head 20 Nozzle 21 Cam plate 22 Cam groove 23 Cam follower 24 Sleeve 24a Spline groove 25 Upper rotating cylinder 25a Spline teeth 30, 31 Bearing block 35 Drive pulley 36 Rotating shaft 37 driven pulley 38 first timing belt 40 cam plate rotation pulley 41 driven pulley 44, 45 guide rod 46 slide plate 50 ball screw 51 motor 61, 62 movable pulley 70, 71, 72, 73 idle pulley 74 second timing belt

Claims (3)

[Claims] 1. A lead wire introduction cylinder which is coaxially arranged at the center of a stator core, swings at a predetermined angle, and reciprocates in an axial direction, a head mounted on a tip of the lead wire introduction cylinder, and a head. A nozzle that is attached to the lead-in pipe via the wire and feeds out the lead in a direction substantially perpendicular to the lead-in pipe, and the nozzle runs around the internal teeth of the stator core by the operation of the lead-in pipe. In a winding device for a stator core adapted to wind a conductive wire, the nozzle is mounted on the head so as to be slidable in the radial direction, and a cam follower is attached to a base end portion of the nozzle. A cam plate having a cam groove to be fitted therein is rotatably built in the head, and has cam plate rotating means for rotating the cam plate relative to the conducting wire introduction cylinder. The cam plate rotating means is rotatably mounted on the rotating shaft, the driving pulley mounted on the rotating shaft, and the conductive wire introducing cylinder, and is interlocked with the cam plate. A cam plate rotating pulley, at least one pair of movable pulleys moved by a different driving means than the driving means of the conducting wire introduction cylinder, and a belt stretched over these pulley groups; and the movable pulley, The belt travels around the pulley group so as not to change the length of the belt, and the belt length of the portion from the driving pulley to the cam plate rotation pulley and the portion of the belt from the cam plate rotation pulley to the driving pulley A winding device for a stator core, wherein the length of the belt is changed. 2. The movable pulley comprises a pair of pulleys mounted at predetermined intervals on a slide plate that reciprocates in a direction intersecting a line connecting the driving pulley and the cam plate pulley, An idle pulley is disposed between each pulley including the driving pulley, the cam plate rotating pulley, and the movable pulley, and a belt portion stretched between the movable pulley and the idle pulley moves in a moving direction of the slide plate. 2. The winding device for a stator core according to claim 1, wherein the winding device is arranged in parallel with the stator core. 3. The winding device according to claim 2, wherein the slide plate is screwed and moved by a ball screw that is rotated by a motor whose rotation can be controlled.