JP2000175415A - Device for winding to stator core - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coil winding device, in relatively simple structure for aligning a conductor to the internal tooth of a stator core in the radial direction for winding. SOLUTION: A head 18 is fitted to the tip of a conductor introduction cylinder 12 that is coaxially arranged at the center of a stator core, is rocked at a specific angle, and at the same time is reciprocated in the axial direction. A nozzle 24 is fitted to the head 18 so that it can slide in the radial direction. A cam plate 23 is arranged rotatably in the head 18, and a cam follower 28 that is provided at the base part of the nozzle 24 is engaged into a cam groove 27. Furthermore, a motor 31 that can rotate and control the cam plate 23 is fitted to the head 18. Then, when winding operation is made by the operation of the conductor introduction cylinder 12, the cam plate 23 is rotated by the motor 31 and the nozzle 24 is moved back and forth in a radius direction via the cam follower 28 which is in contact with the cam groove 27.

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. 9 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 an 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. 10 shows the internal teeth 1 of the stator core 1.
3B 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 one shown in No. 1 was common. That is, guide rods 6 extending in the radial direction of the stator core 1 are arranged near both end faces of the internal teeth 1b of the stator core 1, and the conductor W is slid down along the tapered surface 6a provided at the tip of the guide rod 6. To guide the winding position of the conductive wire W, and by gradually moving the guide rod 6 in the radial direction as shown by the arrow B in the figure, the winding position of the conductive wire W is gradually shifted so that the internal teeth 1b Is a device that is wound uniformly along the radial direction of 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. 11, the conductor W is to be wound around, for example, the tip side of the internal teeth 1b (near the slot 1a). At this time, the guide rod 6 is advanced inward in the radial direction of the stay core 1, and the guide rod 6 is disposed so that the tip thereof is located at the tip of the internal teeth 1b. However, nozzle 3 is slot 1
a, the tip of the nozzle is located at the back of the slot 1a as shown by the imaginary line 3a in the drawing, so that the conductor W
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. 11 could not 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.

Accordingly, an object of the present invention is to provide a winding on a stator core which has a relatively simple structure and which can be wound around the inner teeth of the stator core to be wound in a radially aligned manner as much as possible. It is to provide a device.

[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. And wherein the rotation controllable motor for rotating the cam plate is attached to the head.

According to the present invention, the cam plate is reciprocated at a predetermined angle and timing by the motor whose rotation can be controlled, so that the cam follower attached to the nozzle is pressed against the inner wall of the cam groove of the cam plate and has a radius. , And the nozzle moves back and forth in the radial direction with respect to the head. The movement of the nozzle in the radial direction of the stator core can be accurately set by a rotation controllable motor so that an ideal winding in accordance with the shape of the slot 1a is formed. For example, as shown in FIG. It is possible to apply a winding so as to obtain a maximum space factor.

A mechanism for moving the nozzle forward and backward in the radial direction includes a cam follower provided at a base end of the nozzle,
A cam plate having a cam groove into which the cam follower fits,
Since the motor is mounted directly on the head and rotates the cam plate, the structure is extremely simplified, the operation is reliably performed, and the durability is improved.

According to a preferred aspect of the present invention, a connector for connecting a lead wire of the motor is attached to the head. According to this aspect, when the head moves at high speed, when the lead wire is subjected to repeated bending operations and breaks, etc., the lead wire can be removed from the connector and immediately replaced with a new lead wire. The time can be shortened and the productivity can be increased. However, according to the experiment of the present inventor, it was found that fatigue due to repeated bending of the lead wire was not so intense, and sufficient durability for practical use was obtained.

According to a preferred aspect of the present invention, the motor is installed above the head, a boss is formed at the center of the upper portion of the cam plate, and a drive shaft of the motor is inserted and fixed to the boss. I have. According to this aspect, the installation space for the motor can be widened, so that the motor can be easily applied to a small stator core, and since the motor is mounted almost coaxially with the conductor introduction tube, weight is balanced and operation is stable. Benefits are obtained.

[0018]

1 and 2 show an embodiment of a winding device for a stator core according to the present invention. FIG. 1 is a front sectional view showing a main part of the winding device, and FIG. 2 is a plan sectional view showing a main part of the winding device.

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 lead wire introducing tube 12 is swung (reciprocatingly rotated) at a predetermined angle as shown by an arrow A in FIG. 2 and reciprocates in the axial direction as shown by an arrow B in FIG. A drive mechanism for moving and rotating around the corresponding internal teeth 11a of the stator core 11 is provided. As such a driving mechanism, for example, a known driving mechanism as disclosed in Japanese Patent Application Laid-Open No. 2-214446 by the present applicant can be adopted.

At the upper end of the wire introduction tube 12, a head 18 including a fastening block 15, a head body 16, an upper cover 17, and the like is attached. Tightening block 15
Is fastened and fixed to the outer periphery of the upper end portion of the lead wire introducing tube 12 by bolts 19, screws 20, and the like.
The upper cover 17 is fixed to the tightening block 15 by bolts 21 and the like, and the upper cover 17 is fixed to the upper surface of the head main body 16 by bolts 22 and the like.

The head body 16 is fixed to the fastening block 15
The ring-shaped cam plate 23 mounted on the outer periphery is rotatably held. In addition, the rectangular cylindrical block 25 attached to the base end of the nozzle 24 is inserted into the guide groove 26
And is slidably held in the radial direction. In the case of this embodiment, the nozzles 24 are composed of three nozzles that extend radially at equal angles, and the three nozzles 2
4 allows three internal teeth to be wound simultaneously.

Further, the cam plate 23 is provided with three spirally-shaped cam grooves 27 corresponding to the respective nozzles 24 in a circular arc whose radius changes gradually with respect to the conductor introduction tube 12. The cam followers 28 attached to the square tubular blocks 25 of the respective nozzles 24 are fitted in the nozzles 27. A gear 29 is provided on the outer periphery of the cam plate 23.
A drive gear 30 mounted on a drive shaft 32 of a rotation controllable motor 31 such as a stepping motor mounted on the lower surface of the head body 16 is formed on the gear 29.
Are engaged. A connector 34 to which a lead wire 33 for controlling the drive of the motor 31 is detachably connected is attached to the lower surface of the head body 16.

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 reciprocating in the axial direction as shown by an arrow B in FIG. Each nozzle 24 attached via 18 orbits around a corresponding internal tooth of a stator core (not shown), and winds a wire passing through the wire introduction cylinder 12 and being drawn out from the tip of the nozzle 24 around the internal tooth.

In connection with this winding operation, the motor 31 operates according to a preset program, and the driving gear 3
0 and the cam plate 2 via the gear 29 on the outer periphery of the cam plate 23.
3 is rotated at a predetermined angle and timing. Cam plate 2
3 rotates, the cam follower 28 fitted in the cam groove 27 of the cam plate 23 is pushed by the inner wall of the cam groove 27 and moves in the radial direction, so that the square tubular block 27 forming the base of the nozzle 24 is formed.
Is moved along the guide groove 26 in the radial direction. As a result, each nozzle 24 moves forward and backward in the radial direction of the stator core as shown by the arrow C in FIG. 2, and can wind while aligning the conductor along the projecting direction of the internal teeth to be wound. .

The movement of the nozzle 24 in the radial direction can be freely adjusted in accordance with the progress of the winding operation by setting the control circuit of the motor 31 capable of controlling the rotation.
For example, as shown in FIG. 10, winding can be performed in an ideal winding form that maximizes the space factor.

3 to 8 show another embodiment of a winding device for a stator core according to the present invention. 3 is a front sectional view showing a main part of the winding device, FIG. 4 is a front sectional view of a cam plate used in the winding device, FIG. 5 is a bottom view of the cam plate, and FIG. 7, FIG. 7 is a plan sectional view of the nozzle, and FIG. 8 is an end view of the nozzle viewed from the base side.

This winding device 41 has a head 42 attached to the upper end of the wire introduction tube 12.
A head body 43 attached to the upper end of the conducting wire introduction cylinder 12,
A lid 44 is screwed onto the head body 43 from above.

Guide grooves 45 penetrating in the radial direction are formed in the head body 43 radially at a predetermined angle in the circumferential direction. A nozzle 46 is slidable in these guide grooves 45 in the radial direction. It is installed. The conductor is the conductor introduction cylinder 1
2 and through the center hole 47 of the nozzle 46, and is fed out in a direction substantially perpendicular to the wire introduction tube 12.

As shown in FIGS. 6 to 8, the nozzle 46 has a hole 48 for inserting a pin of a cam follower 49 on the upper surface on the base side thereof. In this embodiment, the hole 48 has two holes.
The position of the cam follower 49 can be changed depending on the size of the stator core. Also,
The tip of the nozzle 46, than the width W ₁ when viewed from the front, the direction of the width W ₂ when viewed from a plane is narrow.
Thus, the required strength is maintained, the stator core is easily inserted into the slot, and the space factor of the conductor in the slot is increased.

A cam plate 50 having a boss 51 at the center of the upper surface is disposed above the nozzle 46. Figures 4 and 5
In addition, on the lower surface of the cam plate 50, three spiral cam grooves 53 similar to those in the above-described embodiment are provided corresponding to the respective nozzles 46. The boss 51
The drive shaft 32 of the motor 31 whose rotation can be controlled, such as a stepping motor, installed on the lid 44 is inserted from above, and the screw 55 inserted through a screw hole 54 formed on the side of the boss 51 is used. , The drive shaft 32 and the cam plate 50 are integrally connected.

The lid 44 is screwed to the head main body 43 with a screw portion 44a, and holds the cam plate 50 rotatably with the cam plate 50 interposed therebetween.
The motor 31 is mounted on the upper surface of the lid 44, and is installed such that the drive shaft 32 is coaxial with the conductor introduction tube 12. The lead wire 56 of the motor 31 is made of a material and a structure that is not easily fatigued by repeated bending, and is connected to a control circuit (not shown).

Next, the operation of the winding device 41 will be described.
However, as described in the above-described embodiment, each of the components mounted on the upper end portion of the lead wire introduction tube 12 via the head 42 by swinging (repetitive rotation) at a predetermined angle and reciprocating in the axial direction. The nozzle 46 orbits around the corresponding internal teeth of the stator core (not shown), and winds a wire passing through the wire introduction cylinder 12 and being drawn out from the tip of the nozzle 46 around the internal teeth.

In connection with this winding operation, the motor 31 operates according to a preset program, and the drive shaft 31
, The cam plate 50 is rotated at a predetermined angle and timing. When the cam plate 50 rotates, the cam follower 49 fitted in the cam groove 53 of the cam plate 50 is pushed by the inner wall of the cam groove 53 and moves in the radial direction, and the nozzle 46 moves the guide groove 45.
Move radially along. As a result, each nozzle 46
However, the winding can be performed while moving in the radial direction of the stator core and aligning the conductor along the protruding direction of the internal teeth to be wound.

In the case of this embodiment, the motor 31
Is arranged on the upper part of the head 42 and substantially coaxially with the lead wire introducing cylinder 12, so that the mounting space for the motor 31 can be widened without interfering with the stator core, and the invention can be applied to a small stator core. Easier to do. In addition, since the motor is disposed substantially coaxially with the conductor introducing tube 12, the weight balance is not lost, and the winding operation can be performed stably by suppressing the vibration of the nozzle.

[0035]

As described above, according to the present invention,
By operating the motor mounted on the head to rotate the cam plate at a predetermined angle and moving the nozzle forward and backward in the radial direction of the stator core via a cam follower abutting on the cam groove, the nozzle is extended from the nozzle tip. The winding can be performed while gradually changing the winding position of the conductive wire along the projecting direction of the internal teeth of the stator core, whereby the conductive wire can be aligned and wound.

Further, the movement of the nozzle in the radial direction of the stator core can be accurately performed by a motor whose rotation can be controlled.
In addition, since it is possible to set an ideal winding according to the shape of the slot of the stator core, it is possible to apply the winding so as to obtain the maximum space factor as shown in FIG. 10, for example. .

Further, a mechanism for moving the nozzle forward and backward in the radial direction includes a cam follower provided at the base end of the nozzle,
A cam plate having a cam groove into which the cam follower fits,
Since the motor is mounted directly on the head and rotates the cam plate, the structure is extremely simplified, the operation is reliably performed, and the durability is improved.

[Brief description of the drawings]

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

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

FIG. 3 is a front sectional view showing another embodiment of a winding device for a stator core according to the present invention.

FIG. 4 is a front sectional view of a cam plate used in the winding device.

FIG. 5 is a bottom view of the cam plate.

FIG. 6 is a front sectional view of a nozzle used in the winding device.

FIG. 7 is a plan sectional view of the nozzle.

FIG. 8 is an end view of the nozzle viewed from a base side.

FIG. 9 is a plan view showing a general structure of a winding device for a stator core.

FIG. 10 is a partial cross-sectional view showing a state in which a conductive wire is wound around the inner teeth of the stator core so as to have the highest space factor.

FIG. 11 is an explanatory view showing an example of a conventional winding device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator core 1a Slot 1b Internal tooth 11, 41 Winding device 12 Conductor introduction cylinder 18, 42 Head 23, 50 Cam plate 26, 45 Guide groove 27, 53 Cam groove 28, 49 Cam follower 29 Gear 30 Drive gear 31 Motor 32 Drive shaft 33, 56 Lead wire 34 Connector

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 conductor, the nozzle is mounted slidably in the radial direction with respect to the head, and a cam follower is attached to a base end of the nozzle. A cam plate having a cam groove to be fitted is rotatably built in the head,
And a rotation controllable motor for rotating the cam plate is mounted on the head. 2. The winding device for a stator core according to claim 1, wherein a connector for connecting a lead wire of the motor is attached to the head. 3. The stator core according to claim 1, wherein the motor is installed above the head, a boss is formed at a center of an upper portion of the cam plate, and a drive shaft of the motor is inserted and fixed to the boss. Winding device to.