JP4439201B2 - Multipole armature winding method and winding apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in a winding method and a winding apparatus for a multipole armature in which a wire rod is continuously wound around each divided bobbin.
[0002]
[Prior art]
Conventionally, a stator used for a motor or the like as this type of multi-pole armature rotates a divided bobbin to wind a wire around each bobbin, and then connects the bobbins in an annular shape to assemble a stator. It is like that.
[0003]
Further, it is known that the space factor (density) of the winding can be increased by winding a plurality of thin wires instead of the thick wires.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-58181
[Problems to be solved by the invention]
However, in such a conventional multi-pole armature winding method, when each divided bobbin is rotated and a plurality of wires fed from the nozzle are bundled to be wound around each bobbin, There is a problem that voids are easily generated between the wires due to friction between the wires, and the space factor of the windings cannot be increased.
[0006]
The present invention has been made in view of the above problems, and an object of the present invention is to provide a winding method and a winding device for a multipole armature that can increase the space factor of the winding.
[0007]
[Means for Solving the Problems]
The first invention uses a spindle shaft for mounting a bobbin, a spindle mechanism for rotating the spindle shaft, a nozzle for feeding out a plurality of wire rods, and a nozzle moving mechanism for moving the nozzle, and a wire rod fed out from the nozzle. Is applied to a winding method of a multi-pole armature in which a coil is formed by winding each of the bobbins rotating.
[0008]
Then, using a nozzle having a plurality of nozzle holes through which each wire is inserted, and a nozzle rotating mechanism that rotates the nozzle around an axis in which the nozzle hole extends , the wire is bobbed so that the cross section of the coil is substantially trapezoidal. When winding on a bobbin, a plurality of wire rods fed out from each nozzle hole are bundled by rotating the nozzle around the axis in which the nozzle hole extends and inclining along the substantially trapezoidal cross section of the coil. It was characterized by that.
[0009]
A second invention includes a spindle shaft for mounting a bobbin, a spindle mechanism for rotating the spindle shaft, a nozzle for feeding out a plurality of wire rods, and a nozzle moving mechanism for moving the nozzle, and the wire rod fed out from the nozzle Is applied to a winding device for a multi-pole armature in which a coil is formed by winding it on each rotating bobbin.
[0010]
The nozzle includes a nozzle having a plurality of nozzle holes through which each wire is inserted, and a nozzle rotation mechanism that rotates the nozzle around an axis in which the nozzle hole extends, and the wire is bobbed so that the cross section of the coil is substantially trapezoidal. When winding on a bobbin, a plurality of wire rods fed out from each nozzle hole are bundled by rotating the nozzle around the axis in which the nozzle hole extends and inclining along the substantially trapezoidal cross section of the coil. It was characterized by having a configuration.
[0011]
A third invention is characterized in that, in the second invention, a tension mechanism is provided for adjusting the tension independently for each wire supplied to the nozzle.
[0013]
According to a fourth invention, in the second or third invention, a plurality of bobbins are mounted side by side in the axial direction of the spindle shaft, a spacer is interposed between adjacent bobbins, and between the bobbins adjacent to the spacer. A guide groove for guiding the extending connecting wire is formed.
[0014]
Operation and effect of the invention
According to the first and second aspects of the invention, the spindle mechanism rotates the bobbin, so that the wire fed from each nozzle hole of the nozzle is bundled and wound around each bobbin.
[0015]
At this time, since each wire rod wound in a bundle is fed out from the nozzle at a predetermined interval, the wire rods are smoothly fed out from each nozzle hole without being entangled by friction, and turbulence occurs. Can be prevented.
[0016]
By smoothly feeding the wire from each nozzle hole and stabilizing its movement trajectory, it is possible to form and align a cross portion where the upper layer and the lower layer wire wound around the bobbin intersect, The performance of the motor can be improved by increasing the space factor of the windings.
[0017]
According to the third invention, the tension mechanism adjusts the tension independently for each wire supplied to the nozzle, so that each wire is wound around the bobbin with a uniform tension, and there is a gap between the wires. Occurrence is suppressed, and the space factor of the winding is increased to improve the performance of the motor.
[0019]
According to the fourth invention, it is possible to continuously wind the wire around each bobbin by mounting the plurality of bobbins side by side in the axial direction of the spindle shaft via the spacer. By forming the connecting wire extending between the adjacent bobbins along the guide groove of the spacer, the coil and the connecting wire can be accurately formed at predetermined positions.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0021]
In FIG. 7, a stator 1 is a multi-pole armature constituting an inner rotor type three-phase AC motor, and has five U, V, and W phase magnetic poles 2 in total, and a total of 15 magnetic poles 2 face inward. Lined up in an annular shape. Each magnetic pole 2 includes a bobbin 3 divided from each other and a coil 5 formed by winding a wire 4 around the bobbin 3. After the coils 5 are wound around the bobbins 3 in a state of being separated from each other, the bobbins 3 are arranged in an annular shape and connected to assemble the stator 1.
[0022]
The number of the magnetic poles 2 of the stator 1 is not limited to this. For example, the number of the magnetic poles 2 may be set to nine, and the wire rod 4 may be continuously wound around the three bobbins 3 by the winding device 9. good.
[0023]
As shown in FIG. 5, the bobbin 3 has a core portion 37 around which the wire 4 is wound, and large and small collar portions 38 and 39 that expand so as to sandwich the core portion 37. The number of windings of the wire 4 wound around the bobbin 3 gradually increases from the small brim portion 39 to the large brim portion 38, and the cross section of the coil 5 wound around the bobbin 3 is substantially trapezoidal. Thus, as shown in FIG. 7, in the state where each bobbin 3 is assembled to the stator 1, the space between the slots formed by the coils 5 wound around the adjacent bobbins 3 is reduced, and the space of the wire 4 is increased. The rate (density) is increased.
[0024]
In FIG. 1, the winding device 9 automatically winds the wire 4 around five bobbins 3. Hereinafter, the configuration of the winding device 9 will be described. Here, it is assumed that three axes X, Y, and Z that are orthogonal to each other are set, the Y axis extends in a substantially horizontal front-rear direction, the X axis extends in a substantially horizontal lateral direction, and the Z axis extends in a substantially vertical direction.
[0025]
The winding device 9 includes a spindle shaft 31 on which the bobbin 3 is mounted, a spindle mechanism 30 that rotates the spindle shaft 31 around the center axis of the bobbin 3 with respect to the gantry 8, and a nozzle 10 that feeds a plurality of wires 4. And a nozzle moving mechanism 25 for moving the nozzle 10 in a three-dimensional direction, and the coil 5 is formed by winding the wire 4 fed from the nozzle 10 around each rotating bobbin 3.
[0026]
The spindle mechanism 30 includes a spindle shaft 31 that is rotatably supported around the Z axis with respect to the gantry 8 and a servo motor 32 that rotationally drives the spindle shaft 31.
[0027]
Five bobbins 3 are mounted on the spindle shaft 31 side by side in the axial direction. The spindle shaft 31 passes through each bobbin 3 and supports each bobbin 3 on the Z-axis. Spacers 35 are interposed between the bobbins 3 to position the bobbins 3.
[0028]
The lowermost spacer 35 is placed on a table 33 that is rotationally driven by the servo motor 32, and the bobbins 3 and the spacers 35 are alternately stacked thereon, and the spacer 35 is placed on the uppermost bobbin 3. . Each bobbin 3 is mounted in a stacked manner such that the small brim portion 39 comes above the large brim portion 38.
[0029]
The spacer 35 is formed in a cylindrical shape having a hole into which the spindle shaft 31 is inserted, and is mounted so as to be fitted to the spindle shaft 31. However, the present invention is not limited to this, and the spacer 35 may be formed in a half shape so as to sandwich the spindle shaft 31.
[0030]
A binding rod 36 for binding the wire 4 is provided on the upper end portion of the spindle shaft 31. In the present embodiment, the wire 4 extending from the binding rod 36 is first wound around the uppermost bobbin 3 and then wound around the lower bobbin 3 in order.
[0031]
It is comprised so that the winding direction of the wire 4 may reverse alternately with respect to the bobbins 3 arranged up and down. That is, as viewed from above, the wire 4 is wound around the uppermost bobbin 3 in the counterclockwise direction (CCW), and is wound around the second stage bobbin 3 in the clockwise direction (CW). Winding in the counterclockwise direction (CCW) around the three-stage bobbin 3 from above, winding in the clockwise direction (CW) around the four-stage bobbin 3 from above, On the other hand, it is wound in the counterclockwise direction (CCW).
[0032]
As shown in FIG. 2, the spacer 35 is provided with a guide groove 45 that guides the wire 4 that extends from the upper bobbin 3 to the lower bobbin 3 and becomes the crossover 6. The guide groove 45 is formed by a guide wall 46 that protrudes outward from the large collar portion 38 of the bobbin 3 and a guide wall 47 that faces the guide wall 46. The guide wall 46 is formed with an inclined portion 48 inclined with respect to the axial direction, and the wire 4 guided thereby is prevented from being bent.
[0033]
Corresponding to the winding direction of the wire 4 being alternately reversed with respect to the bobbins 3 arranged vertically, the side on which the guide wall 46 and the inclined portion 48 are formed is alternately arranged with respect to the spacers 35 arranged vertically. It is comprised so that it may differ, and it suppresses that the wire 4 guided by this will bend.
[0034]
The nozzle moving mechanism 25 includes a front / rear moving table 17 that moves in the Y-axis direction with respect to the gantry 8 by a servo motor 16, and a lateral moving table 19 that moves in the X-axis direction with respect to the front / rear moving table 17 by a servo motor 18 The horizontal moving table 19 is provided with an elevator 21 that is moved in the Z-axis direction by a servo motor 20, and the nozzle 10 is supported by the elevator 21. Each of the servo motors 16, 18, and 20 rotates a ball screw and translates a follower screwed into the ball screw in the axial direction of the ball screw.
[0035]
The nozzle 10 is supplied with a plurality of wires 4 from a wire supply mechanism 40. When the bobbin 3 mounted on the spindle shaft 31 rotates, a plurality of wire rods 4 fed out from the nozzle 10 are wound around the bobbin 3 as a bundle. Thus, by winding a plurality of thin wire rods 4 instead of the thick wire rods, the space factor of the wire rods 4 is increased and the performance of the motor can be improved.
[0036]
In addition, although the number of the wire rods 4 drawn out from the illustrated nozzle 10 is less than the actual number for the sake of convenience, the number actually exceeds, for example, several tens.
[0037]
As shown in FIGS. 3 and 4, the nozzle 10 is formed in a cylindrical shape, and a plurality of nozzle holes 11 through which each wire 4 is inserted are formed so as to penetrate in the axial direction. Each nozzle hole 11 is opened at a predetermined interval.
[0038]
The nozzle 10 is supported on the lifting platform 21 via a support sleeve 22. Each wire 4 passes through the hollow support sleeve 22 and is sent to each nozzle hole 11 of the nozzle 10.
[0039]
A nozzle rotation mechanism 60 that rotates the nozzle 10 around the Y axis in which the nozzle hole 11 extends is provided. The nozzle rotation mechanism 60 includes a bearing 12 that rotatably supports the nozzle 10 with respect to the support sleeve 22, and a servo motor 13 that rotationally drives the nozzle 10. A gear 14 is connected to the rotation shaft of the servo motor 13, and a gear 15 that meshes with the gear 14 is fixed to the outer periphery of the nozzle 10.
[0040]
The nozzle 10 is rotatably supported by a support sleeve 22 via a bearing 12 and is driven to rotate by a servo motor 13. A gear 14 is connected to the rotation shaft of the servo motor 13, and a gear 15 that meshes with the gear 14 is fixed to the outer periphery of the nozzle 10.
[0041]
The winding device 9 includes a controller 80 that controls the operation of each servomotor 13, 16, 18, 20.
[0042]
The wire rod supply mechanism 40 includes a tension mechanism 41 that adjusts the tension independently for each wire rod 4 supplied to the nozzle 10. The same number of tension mechanisms 41 as the number of wires 4 are provided side by side on the gantry 48.
[0043]
In the tension mechanism 41, the wire 4 from the wire source 42 is wound around a tension applying pulley 43, guided to a guide pulley 45 at the tip of a tension bar 44, and then to the nozzle 10 via a guide roller 46. Sent.
[0044]
Further, the tension bar 44 can be rotated around a fulcrum, and fluctuations in the tension of the wire 4 are absorbed by the rotation of the tension bar 44.
[0045]
The rotation angle of the tension bar 44 is fed back by a potentiometer (not shown), the torque applied to the tension bar 44 is controlled via a controller and actuator (not shown), and the angle of the tension bar 44 is adjusted to return to the target position. Thereby, there is little inertial load concerning the wire 4 and it can absorb smoothly that the tension | tensile_strength of the wire 4 changes transiently.
[0046]
The structure of the tension mechanism 41 is disclosed in Japanese Patent Laid-Open No. 2000-128433.
[0047]
The tension mechanism 41 is not limited to this, and as disclosed in Japanese Patent Laid-Open No. 6-255484, the rotation of the pulley 43 is braked by an electromagnetic brake, and a predetermined tension is applied to the wire 4 by this braking force. It is good also as a structure.
[0048]
The winding device 1 is configured as described above, and the wire 4 is wound around the bobbin 3 by the following procedure. The stator 7 is formed by the following procedure.
The five bobbins 3 are mounted on the spindle shaft 31 via the spacers 35.
-The wire 4 fed out from the nozzle 10 is held by a clamp (not shown).
-The wire 4 fed out from the nozzle 10 is entangled with the tie rod 36.
Move the nozzle 10 to a predetermined position near the uppermost bobbin 3 and hold it.
Cut the wire 4 between the clamp and the binding rod 36 with a cutter (not shown).
-The bobbin 3 mounted on the spindle shaft 31 is rotated, and the nozzle 10 is moved in the Z-axis direction in conjunction with a plurality of wires 4 fed from the nozzle 10 being wound around the bobbin 3 as a bundle. At the same time, the nozzle 10 is rotated around the Y axis. Thereby, the wire 4 is wound so that the cross section of the coil 5 becomes a substantially trapezoid.
When the winding of the wire rod 4 on one bobbin 3 is thus completed, the nozzle 10 is moved along the guide groove 45 and the wire rod 4 is wound around the lower bobbin 3.
When the winding of the wire 4 around all the bobbins 3 is thus completed, the wire 4 is held by a clamp (not shown).
Cut the wire 4 between the bottom bobbin 3 and the clamp with a cutter (not shown).
Extract five bobbins 3 and spacers 35 from the spindle shaft 31.
[0049]
Thus, after forming the five bobbins 3 around which the wire 4 is continuously wound, the bobbins 3 are arranged in an annular shape and connected to assemble the stator 1.
[0050]
As configured above, the spindle mechanism 30 rotates the bobbin 3, whereby the wire 4 fed out from each nozzle hole 11 of the nozzle 10 is bundled and wound around each bobbin 3.
[0051]
At this time, since the plurality of wire rods 4 are fed out from the nozzles 10 at a predetermined interval, it is possible to prevent the wire rods 4 from being smoothly drawn out from the nozzle holes 11 without being entangled with each other by friction, thereby preventing turbulence. .
[0052]
Then, each tension mechanism 41 independently adjusts the tension for each wire 4 supplied to the nozzle 10, so that each wire 4 is wound around the bobbin 3 with uniform tension, and a gap is formed between the wires 4. It is possible to suppress the generation of the portion, increase the space factor of the windings, and improve the performance of the motor.
[0053]
More specifically, as shown in FIG. 5, as the nozzle moving mechanism 25 reverses the moving direction of the nozzle 10 with respect to the Z-axis direction, the upper wire 4 wound around the bobbin 3 becomes the lower wire. A cross part is generated at a portion that rides on 4, and a gap part in which the wire 4 is not wound is formed in the vicinity of the cross part.
[0054]
Each wire 4 fed out from each nozzle hole 11 is wound around the bobbin 3 with a constant tension, so that each wire 4 is wound around the bobbin 3 at a predetermined position, as shown in FIG. The cross part is formed side by side in the Z-axis direction at a predetermined position. When the cross portions are formed in a concentrated manner in this way, the wires 4 of each cross portion are distributed so as to fill the respective gap portions, and the space factor of the winding can be increased.
[0055]
On the other hand, in the case of the conventional apparatus, the tension of each wire 4 is not constant due to the frictional force acting between each wire 4 fed from the nozzle 10, so that the cross portion is aligned in the Z-axis direction as shown in FIG. Each cross part is scattered in a wide range, and the space factor formed in the vicinity of each cross part decreases the space factor of the winding.
[0056]
Furthermore, when the wire 4 is wound around the bobbin 3 so that the cross section of the coil 5 is substantially trapezoidal, the nozzle 10 is rotated around the Y axis where the nozzle hole 11 extends to be inclined along the trapezoidal cross section of the coil 5. Thereby, the wire 4 can be smoothly drawn out from each nozzle hole 11, and it can prevent that winding disorder arises.
[0057]
That is, the feeding amount of the wire 4 with respect to the coil 5 is longer when wound around the lower part of the trapezoidal section than when wound around the upper part of the trapezoidal section, but the tension of the wire 4 fed out from each nozzle hole 11 is greater. By independently adjusting and inclining the nozzle 10 along the trapezoidal cross section of the coil 5, the wires 4 are wound in an aligned manner without crossing each other, and the space factor of the winding is increased.
[0058]
By mounting a plurality of bobbins 3 side by side in the axial direction of the spindle shaft 31 via the spacers 35, the wire 4 is continuously wound around each bobbin 3. By forming the connecting wire 6 extending between the adjacent bobbins 3 along the guide groove 45 formed in the spacer 35, the coil 5 and the connecting wire 6 can be accurately formed at predetermined positions.
[0059]
The present invention is not limited to the above-described embodiment, and it is obvious that various modifications can be made within the scope of the technical idea.
[Brief description of the drawings]
FIG. 1 is a perspective view of a winding device showing an embodiment of the present invention.
FIG. 2 is a front view of the spindle mechanism.
FIG. 3 is a perspective view of the nozzle.
FIG. 4 is a cross-sectional view of the nozzle.
FIG. 5 is a schematic sectional view of the coil.
FIG. 6 is a schematic cross-sectional view of a coil showing a comparative example.
FIG. 7 is a schematic cross-sectional view of a stator that similarly shows an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Stator 3 Bobbin 4 Wire 5 Coil 6 Crossover wire 9 Winding apparatus 10 Nozzle 11 Nozzle hole 25 Nozzle moving mechanism 30 Spindle mechanism 31 Spindle shaft 35 Spacer 41 Tension mechanism 45 Guide groove

Claims (4)

A spindle shaft for mounting a bobbin, a spindle mechanism for rotating the spindle shaft, a nozzle for feeding out a plurality of wire rods, and a nozzle moving mechanism for moving the nozzle are used for each bobbin that rotates the wire rod fed out of the nozzle. In a winding method of a multipole armature that is wound to form a coil,
Using a nozzle having a plurality of nozzle holes through which each wire is inserted, and a nozzle rotating mechanism that rotates the nozzle about an axis extending from the nozzle hole , the wire is bobbed so that the coil has a substantially trapezoidal cross section. When winding on a bobbin, a plurality of wire rods fed out from each nozzle hole are bundled by rotating the nozzle around an axis extending from the nozzle hole and inclining along the substantially trapezoidal cross section of the coil . A winding method for a multi-pole armature, characterized in that it is turned. A spindle shaft for mounting a bobbin, a spindle mechanism for rotating the spindle shaft, a nozzle for feeding out a plurality of wire rods, and a nozzle moving mechanism for moving the nozzle, each bobbin rotating the wire rod fed out from the nozzle In a winding device of a multipole armature that is wound to form a coil,
The nozzle includes a nozzle having a plurality of nozzle holes through which each wire is inserted, and a nozzle rotation mechanism that rotates the nozzle around an axis in which the nozzle hole extends, and the wire is bobbed so that the coil has a substantially trapezoidal cross section. When winding on a bobbin, a plurality of wire rods fed out from each nozzle hole are bundled by rotating the nozzle around an axis extending from the nozzle hole and inclining along the substantially trapezoidal cross section of the coil . A winding device for a multi-pole armature, characterized by being configured to rotate. The winding device for a multi-pole armature according to claim 2, further comprising a tension mechanism that adjusts the tension independently for each wire supplied to the nozzle. A plurality of the bobbins are mounted side by side in the axial direction of the spindle shaft, a spacer is interposed between adjacent bobbins, and a guide groove is formed that guides a connecting wire extending between adjacent bobbins. The winding apparatus for a multipole armature according to claim 2 or 3, characterized by the above-mentioned .

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