JPH1052009A - Lead-wire winding apparatus around stator core - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lead-wire winding apparatus around a stator core wherein a lead wire can be inserted into respective holding grooves of an insulator attached to the stator core, when starting and ending respectively its winding around the stator core. SOLUTION: In a lead-wire winding apparatus having a guide cylinder 16 moved in the axial direction of a stator core 11 and rotated around its axis, a nozzle 18 attached to the end of the guide cylinder 16, a holder 13 for holding rotatably the stator core 11 thereon and a device 31 for holding and cutting a lead wire (W), there are provided cylindrical members 25, 26 for contacting separably and rotatably with the end surface of the stator core 11. Forming notches 32, 33 respectively in the cylindrical members 25, 26, an edge portion 33a of the foregoing notch 33 is used as a guide to insert the lead wire W into a holding groove 12b of an insulator 12 when starting its winding around the stator core 11, and the path of the lead wire W matches the foregoing groove 12b by the rotation of the holder 13 to squeeze thereafter the lead wire W into a holding groove 12a of the insulator 12, by the upper end surface of the cylindrical member 25 when ending its winding around the stator core 11.

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 As a device for forming a coil on a stator core, a so-called series winding method in which a conductor is directly wound around inner teeth of the stator core to form a coil, or a coil formed by winding a conductor in advance on a formwork, A coil insertion method in which the coil is inserted into a groove of a stator core by a jig is known. The series winding method has the disadvantage that workability is worse than the coil insertion method, but on the other hand, the length of the loop protruding from the end face of the stator core is shortened to improve the performance, and it is possible to manufacture a small but high-performance motor. It has the advantage of becoming.

[0003] As a series winding type coil winding device, for example, Japanese Patent Application Laid-Open Nos.
The method disclosed in U.S. Pat. No. 2,214,447 is known. That is, the device is arranged at the axis of the stator core, is supported so as to be movable and rotatable in the axial direction, introduces the conductor from one end, and is attached to the other end of the guide cylinder to be fed out from the other end. A nozzle that is mounted via a head and feeds out a conductive wire in a direction substantially orthogonal to the guide cylinder, and rotates the guide cylinder in the axial direction so that the nozzle orbits a predetermined inner tooth outer circumference of the stator core. The structure is such that the lead wire is moved and the wire fed from the nozzle is wound around the internal teeth.

On the other hand, an insulating member called an insulator is attached to the stator core so as to cover the inner surface and both end surfaces of the slot of the stator core. In many cases, ribs that also serve as reinforcements are provided in portions of the insulator that cover both end surfaces of the stator core. In recent years, a lead wire holding groove is provided in this rib, and the lead wires, which are both ends of the wound wire, are held in the holding groove to facilitate later lead wire processing operations. Have been done. Until now, the work of inserting the lead wire into the holding groove has been performed manually by now.

[0005]

In recent years, however, there has been a demand for thorough automation of manufacturing operations, especially in Japan, so as to be able to cope with production costs in Asian countries with low labor costs. Therefore, it has been required to automate the operation of holding the lead wire as described above.

Accordingly, an object of the present invention is to provide a winding device for a stator core in which a conductor is wound directly on the inner teeth of the stator core to form a coil, and a lead wire is attached to the stator core at the start and end of winding. Another object of the present invention is to provide an insulator that can be automatically inserted into a holding groove of an insulator.

[0007]

In order to achieve the above object, a first aspect of the present invention is a winding device for forming a coil by directly winding a conductive wire around inner teeth of a stator core, the winding device being arranged on the axis of the stator core. A guide cylinder which is supported so as to be movable and rotatable in the axial direction, introduces a conductor from one end, and extends from the other end, and is mounted via a head attached to the other end of the guide cylinder, and connects the conductor to the guide cylinder. A nozzle that feeds out in a direction substantially perpendicular to the holder, a holder that rotatably holds the stator core, and rotationally positions the stator core so that winding by the nozzle is performed on predetermined internal teeth; and At the start of winding, hold the beginning of the wire, and at the end of winding, pull the end of the wire to cut it,
Opening the end on the winding end side, holding and cutting device for a lead wire holding an end on the new winding start side, and a rib that covers the slot inner surface of the stator core and protrudes from at least one end surface, A lead wire insertion device that inserts and holds the lead wire in the holding groove of the insulator having a holding groove that inserts and holds a lead wire that is a terminal of the conductive wire in the rib, the lead wire insertion device includes: A cylindrical member having a notch of a predetermined shape formed on the outer surface of the stator core so as to be able to contact and separate from the outer periphery of the stator core and having a notch of a predetermined shape. And the end surface of the winding is rotated so that the lead wire can be pushed into the holding groove at the end of the winding.

According to a second aspect of the present invention, in the first aspect, the lead wire insertion device is disposed on the outer periphery of the stator core so as to be able to contact and separate from each other and to be independently rotatable,
A double cylindrical member having a notch of a predetermined shape on each peripheral surface, one cylindrical member guiding a lead wire at the start of winding, and the other cylindrical member guiding a lead wire at the end of winding. It is characterized by being pushed.

According to the first aspect of the present invention, the predetermined inner teeth of the stator core are positioned by the holder at positions where the windings are received by the rotation of the nozzle, and the starting end of the lead wire drawn from the nozzle is held by the holding and cutting device. When the winding is started in a state in which the winding is started, the cylindrical member is rotated so that the notch edge portion is close to the outer periphery of the stator core and coincides with the holding groove of the insulator. When the nozzle starts rotating, the lead wire forming the starting end of the conductor is guided by the notch edge and inserted into the holding groove of the insulator, so that the lead wire forming the starting end of the coil is inserted into the holding groove of the insulator. Can be automatically inserted and held. Thereafter, the cylindrical member returns from the end face of the stator core to the original position.

When the guide tube is driven, the nozzle orbits the internal teeth of the stator core, and when the coil formation is completed, the holding and cutting device draws the end of the conductive wire extending between the coil and the nozzle. In this state, the holder is rotated to position the stator core such that the holding groove of the insulator of the stator core matches the path of the end of the conductor held by the holding and cutting device on the winding end side (coil side). Further, the cylindrical member is rotated so that its end face intersects the path of the end of the wire on the winding end side, and in this state, the cylindrical member approaches the outer periphery of the stator core and the end of the wire is Part is inserted into the holding groove of the insulator.

Thereafter, the holding and cutting device cuts the conductor to open the end on the winding end side and holds a new end on the winding start side (nozzle side). In this way,
The work of inserting the lead wire into the holding groove of the insulator can be automated, which contributes to the complete automation of the coil winding work on the stator core.

According to a second aspect of the present invention, at the start of winding,
One of the cylindrical members is rotated to a predetermined position, the notch edge is rotated so as to match the holding groove of the insulator, and at the end of the winding, the other cylindrical member is rotated to the predetermined position, and The end face may intersect the path of the wire held by the holding and cutting device. Thus, the guide for inserting the lead wire into the holding groove at the start of winding,
Pushing the lead wire into the holding groove at the end of winding is performed by separate cylindrical members, so that the driving mechanism of the cylindrical member is simplified, and the cost and size of the driving device are reduced. be able to.

[0013]

1 to 9 show an embodiment of a coil winding device for a stator core according to the present invention. FIG. 1 is a partial plan view showing the relationship between a stator core, a nozzle, a cylindrical member, and a holding and cutting device. FIG.
FIG. 3 is a partial side sectional view showing a relationship between a guide cylinder, a nozzle, a holder and the like, FIG. 3 is a bottom view showing the shape of a stator core and an insulator attached thereto, and FIG. 4 is a partial side view showing a holding groove provided in the insulator. 5 is a side sectional view showing a driving mechanism of the cylindrical member, FIG. 6 is a side sectional view showing the outer cylindrical member, FIG. 7 is a side sectional view showing the inner cylindrical member, and FIG.
Is a partial plan sectional view of the holding and cutting device, and FIG. 9 is a partial side view of the holding and cutting device.

In FIG. 2, reference numeral 11 denotes a stator core, and reference numeral 12 denotes an insulator mounted on the stator core 11. Reference numeral 13 denotes a holder having a through hole to which the stator core 11 fits and having a claw portion 13a for receiving the lower surface of the stator core 11 on the inner periphery of the through hole. It is rotationally driven by a drive motor. In addition, above the stator core 11,
A pressing member 14 is disposed at the upper end of the insulator 12 mounted on the stator core 11 so as to be able to contact and separate therefrom. Therefore, the stator core 11 includes the holder 13 and the holding member 14.
, And is rotated and positioned by the rotation of the holder 13.

On the other hand, reference numeral 15 in FIG. 2 designates a guide jig for aligning the conducting wire at the time of winding, which is arranged as a pair of upper and lower parts corresponding to the positions of the internal teeth on which the winding is performed. It moves forward and backward in the radial direction with the winding operation via the mechanism. The outer ends of the pair of upper and lower alignment guide jigs 15 are tapered, and the wound conductor is slid down from the end to be wound at a predetermined position of the internal teeth. Then, the leading end position is gradually moved by the above operation, so that the conductive wire is aligned and wound around the outer periphery of the internal teeth.

Reference numeral 16 in FIG. 2 denotes a guide cylinder which is arranged at the axis of the stator core 11 and has a conducting wire introduced from the lower end and led out from the upper end.
No. 6, a reciprocating motion in the axial direction and a reciprocating rotation operation are performed by a driving mechanism as disclosed in No. 6. This guide tube 16
A head 17 having a communication hole 17a communicating with the conductive wire insertion hole 16a of the guide cylinder 16 is mounted on the upper end of the head 17, and a plurality of, in this case, three nozzles 18 are mounted on the head 17 radially. As a result, winding is simultaneously performed on three internal teeth of the stator core 11. The inner hole 18a of the nozzle 18 communicates with the communication hole 17a of the head 17, and the conducting wire introduced through the guide cylinder 16 is led out from the tip of the nozzle 18 through the communication hole 17a and the inner hole 18a. I have. Then, by driving the guide cylinder 16 as described above,
The tip of the nozzle 18 orbits around the internal teeth of the stator core 11, and a conductive wire is wound around the internal teeth to form a coil.

As shown in FIG. 3, in this embodiment, six internal teeth 11a of the stator core 11 are provided, and a slot 11b is formed therebetween. The insulator 12 is mounted so as to cover the inner peripheral surface of the slot 11 b of the stator core 11 and the opening edge of the slot 11 b on both end surfaces of the stator core 11. As shown in FIG. 4, a rib 12a is formed on an outer peripheral portion of a lower end surface of the insulator 12, and a predetermined portion of the rib 12a is more protruded, and a holding groove 12b for a conductive wire is formed on that portion. . The holding groove 12b has a V-shape, and the groove width becomes narrower as the conducting wire is inserted deeper, and the holding groove 12b is held tightly. Further, a boss portion 12c is formed at a predetermined location on the outer peripheral portion of the lower end surface of the insulator 12 so as to project outward from the rib 12a, and a metal pin 19 is inserted into the boss portion 12c. Metal pin 1
9 is a step after winding, in which a metal pin 19 is wound by winding the end of the wire held in the holding groove 12b.
It is intended to enable connection of lead wires only by soldering to a substrate or the like.

As shown in FIG. 5, a holder 13 for holding the stator core 11, an alignment guide jig 15 and the like are supported by a frame 20. An elevating frame 23 is mounted via guide rods 22 inserted into a pair of guide cylinders 21 installed on the frame 20. Then, operating rods 24a, 24a of a pair of air cylinders 24, 24 fixed to the lower surface of the frame 20.
Are connected to the elevating frame 23, and the elevating frame 23 moves up and down by the operation of the air cylinders 24 and 24. A hole 23a through which the guide tube 16 is inserted is formed in the center of the lifting frame 23.

An outer cylindrical member 25 and an inner cylindrical member 26 are concentrically mounted on the inner periphery of the hole 23a so as to be independently rotatable. Outer cylindrical member 2
A gear 25a is attached to the outer periphery of the lower end of the gear 5, and a drive gear 28 mounted on a drive shaft of a first rotary actuator 27 installed on the lifting frame 23 meshes with the gear 25a. The operation of 27 causes the outer cylindrical member 25 to rotate. Also,
The lower end of the inner cylindrical member 26 projects downward from the lower end of the outer cylindrical member 25, and a gear 26a is attached to the outer periphery thereof,
The drive gear 30 mounted on the drive shaft of the second rotary actuator 29 installed on the lifting frame 23
6a, and the inner cylindrical member 26 is rotated by the operation of the second rotary actuator 29. Then, the outer cylindrical member 25 and the inner cylindrical member 26
Is moved up and down by the elevating operation of the elevating frame 23,
The upper ends thereof come into contact with and separate from the outer periphery of the lower surface of the stator core 11.

Reference numeral 31 in FIG. 5 denotes a conductor holding / cutting device that moves obliquely upward and downward toward the lower side of the stator core 11, draws and cuts the terminal portion of the wire at the end of winding, and cuts the wire. The wire end side (coil side) is released, and the winding start side (nozzle side) is held.

As shown in FIG. 6, the outer cylindrical member 25 is
Notches 32 are formed at a plurality of locations on the peripheral wall.
In the case of this embodiment, the notch 32 has a shape in which the upper edge opening is narrow and the lower portion is widened to one side. This is because when the outer cylindrical member 25 is rotated in a state where the holding / cutting device 31 draws the conductor, the nozzle 18 positioned below the stator core 11 from the holding / cutting device 31 for the wire is rotated.
Is made to pass through the expanded space below the notch 32 so as not to interfere with the outer cylindrical member 25. Then, the upper edge protruding portion 25b of the notch 32 of the outer cylindrical member 25 is a portion that presses the conductive wire and inserts it into the holding groove 12b of the insulator 12.

Further, as shown in FIG.
6 also has notches 33 at a plurality of locations on its peripheral wall. The notch 33 has a straight edge 33a along the axial direction. The edge 33a is matched with the holding groove 12b of the insulator 12 at the start of winding, and the leading end of the conductive wire is connected to the holding groove 1b with the rotation of the nozzle 18.
It becomes a guide to be inserted into 2b.

In this embodiment, as the cylindrical member,
Although the double cylindrical member composed of the outer cylindrical member 25 and the inner cylindrical member 26 is used, the rotation stop position of one cylindrical member can be set at a plurality of positions by performing rotation driving of the cylindrical member by a pulse motor or the like. If, for example, the straight edge on the right side of the notch 32 in FIG. 6 in the drawing is used as a guide for inserting a lead wire at the start of winding, the lead wire insertion device can be constituted by only one cylindrical member. Can also.

As shown in FIG. 8 and FIG.
The arm 34 is disposed obliquely with its tip facing the lower surface of the stator core 11, and is inserted through the arm 34,
Bar-shaped hook 35 slidably held in the axial direction
And a cutter 36 to which the claw 35a at the tip of the hook 35 slides and a projection 38 urged in the tip direction by a spring 37 so as to clamp the conducting wire between the claw 35a of the hook 35. It is configured.

The tip of the hook 35 can be moved to positions A, B and C in FIG. 8 by a two-stage air cylinder (not shown). That is, the hook 35
Is pushed out to the position of A, and after the end of the winding, the conductive wire extending between the coil of the stator core and the nozzle can be hooked. When the tip of the hook 35 is pulled back to the position B, the claw 35
The conductive wire hooked on a is sandwiched between the claw portion 35a and the projection 38, but is not cut. Further, when the tip of the hook 35 is pulled back to the position C, the cutter 3
6 and the claw portion 35a of the hook 35 are slid in contact with each other at a portion D in FIG. 9 to cut the conductor, one end (coil side end) of the cut conductor is released, and the other end is cut. The portion (the end on the nozzle side) is held while being sandwiched between the claw portion 35a and the projection 38.

FIG. 1 shows the stator core 11, the nozzle 18, the outer cylindrical member 25, the inner cylindrical member 26,
2 is a plan view showing a relationship between the conductive wire W and a holding and cutting device 31. In the figure, L1 indicates the extending route of the conductor W at the start of winding, L2 indicates the extending route of the conductor W at the end of winding,
L3 and L4 indicate the extending paths when the wire W is drawn by the hook 35 after the winding is completed.

Next, the operation of the winding device on the stator core will be described. First, at the start of winding, the conductor W
1 is extended in the tension path L1 in FIG. 1, that is, a path connecting the tip end of the hook 35a of the holding and cutting device 31 and the tip of the nozzle 18, and the nozzle 18 is located directly below the internal teeth 11a of the stator core 11. I have. In this state, the second rotary actuator 29 in FIG. 5 is operated, so that the edge 33a of the notch 33 of the inner cylindrical member 26 matches the holding groove 12b of the rib 12a of the insulator 12, so that the inner cylindrical member 26 Rotates. Further, the first rotary actuator 27 in FIG. 5 is operated, and the upper edge opening of the notch 32 of the outer cylindrical member 25 is moved to the inner cylindrical member 26.
The outer cylindrical member 25 rotates so as to match the notch 33 of the outer cylindrical member. Then, the air cylinder 24 operates to raise the elevating frame 23, and the upper edges of the inner cylindrical member 26 and the outer cylindrical member 25 abut against the lower surface of the stator core 11,
It is located on the outer periphery of the rib 12a on the lower surface of the insulator 12.

In this state, the nozzle 18 in FIG.
It moves below the internal teeth 11a of the stator core 11 in the direction of the arrow E, rises through the gap between the adjacent internal teeth 11a, rotates half around the internal teeth 11a, and stops above.
At this time, the conductive wire W stretched between the hook tip 25a of the holding / cutting device 31 and the tip of the nozzle 18 is guided by the notched edge 33a of the inner cylindrical member 26 to move along the path L5 in FIG. The rib 1 on the lower surface of the insulator 12
It is inserted and held in a holding groove 12b formed in 2a. Thus, the starting end of the conductive wire W is connected to the holding groove 1 of the insulator 12.
2b. It should be noted that when the nozzle 18 rotates half a turn and stops once above the stator core 11,
The air cylinder 24 in FIG. 5 operates to lower the elevating frame 23, and the inner cylindrical member 26 and the outer cylindrical member 25
Is lowered to a position where the alignment guide jig 15 and the like in FIG. 2 do not interfere. Thereafter, the nozzle 18 is moved to the stator core 11.
The wire W is wound around the internal teeth 11a a predetermined number of times around the internal teeth 11a to form a coil.

When the formation of the coil with respect to the predetermined internal teeth 11a is completed, the holder 13 rotates half a turn and the opposing internal teeth 11a of the stator core 11 come to the winding position. Then, a winding is formed on the inner teeth 11a on the opposite side by 180 ° to form a coil. As described above, the nozzle 18
Are radially provided, so that a total of six coils can be formed by the windings, that is, in this embodiment, coils can be formed on all the internal teeth 11a.

When the second winding operation is completed, the conductor W
Is stretched between the nozzle 18 and the coil along the stretching route L2 in FIG. In addition, since the internal teeth at the opposing position also have the same shape, the internal teeth 11a in FIG.
For the sake of convenience, the internal teeth for applying the first winding and the internal teeth for applying the second winding are illustrated in FIG.

In the state of the stretching path L2, the holder 13 once rotates in the direction of arrow E to hold the conductor W in the holding and cutting device 31.
The stator core 11 is rotated to a position where the hook 35 can be easily taken. Then, the hook 35 is pushed out and the holder 13
Rotates in the direction of arrow F and returns to the original position, and the wire W is hooked on the tip of the hook 35. Then, the hook 35 retreats, hooks the conducting wire W on the claw portion 35a, draws it forward, and holds the conducting wire W between the claw portion 35a and the projection 38. At this time, the wire W has not been cut yet. As a result, the conductor W is connected to the stretched path L in FIG.
3. The state is stretched through L4.

After that, the holder 13 is further rotated in the direction of arrow F, and the stretching path L4,
The wire W stretched between the coil and the coil stops at a position where it is aligned with the holding groove 12b of the insulator 12. At this time, the conducting wire W crosses the holding groove 12b of the insulator 12 obliquely. Then, the first rotary actuator 27 operates to rotate the outer cylindrical member 25 in the direction indicated by the arrow F in FIG. 1, and the upper edge protruding portion 25b of FIG. , And enters above the stretched route L3.

In this state, the air cylinder 24 is actuated, and the elevating frame 23 is raised, and the conductor W of the stretched path L4 is pushed into the holding groove 12b of the insulator 12. And
The hook 35 is further retracted, and the claw portion 35a is formed at a portion D in FIG.
And the cutter 36 are in sliding contact with each other to cut the conductive wire W, and the nozzle 1
The side connected to the coil 8 is held as it is, and the side connected to the coil is released. As a result, the state is the same as the winding start in which the conductive wire W is stretched between the holding / cutting device 31 and the nozzle 18 (stretching route L1).

By the operation described above, the conductor W is wound around the internal teeth 11a of the stator core 11 to form a coil, and the lead wire forming the start end of the conductor W and the end end of the winding are formed. The lead wire to be formed can be automatically inserted into the holding groove 12b of the insulator 12 of the stator core 11.

[0035]

As described above, according to the present invention,
In a winding device for a stator core, in which a coil is formed by directly winding a conductor wire on the inner teeth of the stator core, a lead wire is automatically inserted into a holding groove of an insulator attached to the stator core at the start and end of winding. And can contribute to complete automation of the winding work on the stator core.

[Brief description of the drawings]

FIG. 1 is a partial plan view showing a relationship among a stator core, a nozzle, a cylindrical member, and a holding and cutting device in an embodiment of a winding device for a stator core according to the present invention.

FIG. 2 is a partial side sectional view showing a relationship among a stator core, a guide cylinder, a nozzle, a holder, and the like of the winding device.

FIG. 3 is a bottom view showing the shape of a stator core applied to the winding device and an insulator attached to the stator core.

FIG. 4 is a partial side view showing a holding groove provided in the insulator.

FIG. 5 is a side sectional view showing a driving mechanism of a cylindrical member of the winding device.

FIG. 6 is a side sectional view showing an outer cylindrical member of the winding device.

FIG. 7 is a side sectional view showing a cylindrical member inside the winding device.

FIG. 8 is a partial plan sectional view of a holding and cutting device of the winding device.

FIG. 9 is a partial side view of a holding and cutting device of the winding device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Stator core 12 Insulator 13 Holder 14 Holding member 15 Alignment guide jig 16 Guide cylinder 17 Head 18 Nozzle 19 Pin 20 Frame 21 Guide cylinder 22 Guide rod 23 Elevating frame 24 Air cylinder 25 Outer cylindrical member 25a Gear 26 Inner cylindrical member 26a Gear 27 First rotary actuator 28 Drive gear 29 Second rotary actuator 30 Drive gear 31 Holding and cutting device 32, 33 Notch 34 Arm 35 Hook 36 Cutter 37 Spring 38 Projector

Claims (2)

[Claims] 1. A winding device for forming a coil by directly winding a conductive wire around an inner tooth of a stator core, the winding device being disposed on the axis of the stator core, supported axially movable and rotatably, and introducing the conductive wire from one end. A guide tube extending from the other end, a nozzle mounted via a head attached to the other end of the guide tube, and a nozzle extending the conductor in a direction substantially perpendicular to the guide tube, and rotatably holding a stator core. Then, a holder for rotating and positioning the stator core, so that the winding by the nozzle is formed with respect to predetermined internal teeth, and a starting end of the conducting wire at the start of winding of the conducting wire, The terminal end is pulled and cut to open the end on the winding end side, and also holds and cuts a lead wire holding the end on the new winding start side, and covers the inner surface of the slot of the stator core. A lead wire having a rib protruding from at least one end face and having a holding groove for inserting and holding a lead wire which is a terminal of the conductive wire in the rib, for inserting and holding the lead wire in the holding groove of the insulator. The lead wire insertion device is a cylindrical member having a notch of a predetermined shape on a peripheral surface thereof, which is disposed so as to be able to contact and separate from the outer periphery of the stator core and is rotatable. The notch edge along which rotates to match the holding groove of the insulator, and at the end of winding, the end surface rotates so that the lead wire can be pushed into the holding groove. Winding device for the stator core. 2. The lead wire insertion device is a double cylindrical member which is arranged on the outer periphery of a stator core so as to be able to contact and separate from each other and is rotatable independently, and has a notch of a predetermined shape on each peripheral surface, The winding device for a stator core according to claim 1, wherein one of the cylindrical members guides a lead wire at the start of winding, and the other cylindrical member pushes the lead wire at the end of winding.