JPS62173954A - Winding device for stator core - Google Patents

Abstract

PURPOSE:To permit winding a band material smoothly by engaging a pin with notches of the band material being guided tangentially and by rotating the pin together with a driving wheel. CONSTITUTION:A band material 1 is supplied to a cylindrical casing 2 tangentially thereof, bent spirally in the casing 2 and wound successively around a mandrel 3 to form a stator core 4. A pin engages with notches 8 of the band material 1 being guided tangentially and by rotation of this pin together with the driving wheel, the band material 1 is bent by force, deformed plastically and wound up. In this case, the band material 1 is forced to be fed by a feed mechanism 29.

Description

Detailed Description of the Invention A0 Purpose of the Invention (1) Industrial Application Forming a plurality of first notches for forming slots on the inner periphery of the stator core and circular arc grooves extending in the axial direction on the outer periphery of the stator core. A continuously supplied strip material having a plurality of second notches on both sides thereof is spirally wound around a center line perpendicular to a plane containing the strip material to form a stator core. This invention relates to a stator core winding device.

(2) Prior art Conventionally, in such a hoisting device, for example,
As disclosed in Japanese Patent Application No. 8867, a pin is engaged with the first notch of the strip material, and the side portion of the strip material is continuously collided with a guide wall curved in an arc shape to form a spiral shape due to plastic deformation. I try to wrap it around.

(3) Problems to be Solved by the Invention However, according to the conventional method described above, a large frictional resistance occurs between the side portions of the strip and the guide wall, which becomes a factor that inhibits winding. For this reason, high-speed winding is difficult, and depending on the shape of the strip material, the large load applied to the teeth between the first notches may cause the teeth to curl up, making winding difficult.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a stator core winding device that reduces frictional resistance, enables smooth winding, and also improves the performance of the stator core after winding. With the goal.

B0 Structure of the Invention (1) Means for Solving the Problems The apparatus of the present invention comprises a supply mechanism that supplies the strip material in a straight line;
A spiral guide mechanism that spirally guides the strip material along a virtual circle whose tangential direction is the direction of supply from the supply mechanism, a drive wheel whose axis of rotation is the center of the virtual circle, and a second notch. A plurality of pins having bearings are supported on the drive wheel at equal intervals in the circumferential direction, and a second notch in the band material supplied from the guide mechanism is connected only within a certain angular range along the rotational direction of the drive wheel. A cam mechanism is provided for displacing each of the pins by sliding them on their bearings so as to engage them, and a feeding mechanism connected to the feeding mechanism for forcibly feeding the strip material into the feeding mechanism in synchronization with the drive wheel.

(2) Action The pin engages with the second notch of the strip material guided in the tangential direction, and as this pin rotates together with the drive wheel, the strip material is forcibly bent and plastically deformed, causing it to be hoisted. It will be done. Moreover, since the strip material is forcibly fed by the feeding mechanism, the depth of the second notch may be relatively shallow.

(3) Example Hereinafter, an example of the present invention will be described with reference to the drawings. First, in FIG. The material is bent into a shape and sequentially wound onto a mandrel 3, thereby forming a stator core 4.

In FIG. 2, a strip material 1 is a metal plate made of silicon steel or the like formed into a strip shape, and one side of this strip material 1 has a slot 5 on its inner circumference when the stator core 4 is wound up. A plurality of first notches 6 are provided at equal intervals to form a plurality of first notches 6, and a plurality of second notches 8 are provided on the other side of the strip 1 to form an arcuate groove 7 extending in the axial direction on the outer periphery of the stator core 4. are provided at positions corresponding to between the first notches 6.

In FIGS. 3 and 4, a rotating shaft 9 that is rotatably driven by a rotational driving means (not shown) is rotatably supported in the casing 2 by a bearing 10 with a horizontal axis. A drive wheel 11 is fixed to an intermediate portion of the rotating shaft 9 by a key 12. As shown in FIG. The drive wheel 11 has a second notch 8 in the strip 1.
A plurality of pins 13 that can be engaged with the drive wheel 11 are supported to allow a limited range of movement along the radial direction of the drive wheel 11 and a limited range of movement along the axial direction of the drive wheel 11. Ru. That is, a plurality of radially long elongated holes 14 are bored in the radially intermediate portion of the drive wheel 11, and each pin 13 is inserted through these elongated holes 14. Furthermore, each pin 13 is fitted with a microbearing 15, 16 on both sides of the drive wheel 11. Therefore, each pin 1
3 is movable in the radial direction of the drive wheel 11 within the range defined by the elongated hole 14, and both micro bearings 15°16
is movable in the axial direction of the drive wheel 11 within a range where the drive wheel 11 comes into contact with the drive wheel 11.

A cylindrical body 17 that surrounds the drive wheel 11 is fixed to the casing 2, and a collar 18 that extends radially inward is fixed to the tip of this cylindrical body 17 (left end in FIG. 4). Ru.

A first guide plate 20 , a second guide plate 21 , and a third guide plate 22 are fixed to the end face of the collar 18 in this order along the rotation direction 19 of the rotating shaft 9 . Further, the third guide plate 22 includes
A ring 23 surrounding the rotating shaft 9 is fixed to face the inner periphery of the collar 18.

The first guide plate 20 is formed in a half-moon shape over a center angle α of, for example, 85 degrees from a reference line i perpendicular to the axis of the rotating shaft 9, and is fixed to the collar 18, and the second guide plate 21 is fixed at an angle of, for example, 50 degrees. It is formed in a half-moon shape spanning a central angle β, and is fixed to the collar 18 so as to be continuous with the first guide plate 20. Further, the third temporary guide 22 is formed, for example, in a half-moon shape extending over a central angle γ of 180 degrees, and is fixed to the collar 18 so as to be continuous with the second temporary guide 21.

Therefore, from the reference line l to the tsuba 18, (α+β+T)
degree, for example, over a central angle range of 315 degrees, the first. Second
And third guide plates 20, 21, 22 are fixedly installed.

Between the first guide plate 20 and the third guide plate 22, a portion closer to the third guide plate 22 is provided along a tangent 25 from a point intersecting the reference line l of a virtual circle 24 centered on the axis of the rotating shaft 9. A feeding mechanism 26 is provided for feeding the strip 1 in a straight line. The virtual circle 24 is set corresponding to the stator core 4 to be wound up.

The supply mechanism 26 is constructed by fixing a guide member 27 to the collar 18. That is, a groove 28 along the tangent line 25 is provided on the surface of the guide member 27 on the side of the collar 18, and the strip material 1 is fed along the tangent line 25 by this groove 28, the collar 18, and the ring 23. Ru.

A feed mechanism 29 extending along the tangential direction 25 is connected to the supply mechanism 26 . This feeding mechanism 29 includes a band material guide plate 3 that pinches and guides the band material 1 from both the front and back sides.
0.31, and a feed gear 32 that meshes with the first notch 6 of the strip 1 at the longitudinally intermediate portion of both strip guide plates 30.31.
Equipped with.

The feed gear 32 is connected to a spur gear 37 via a pair of bevel gears 33 and 34, a spur gear 35, and an idle gear 36, and this spur gear 37 is fixed to the rotating shaft 9.

Therefore, the feed gear 32 rotates in synchronization with the operation of the rotary shaft 9, and the strip 1 is forcibly fed into the supply mechanism 26.

In order to guide the strip l supplied from the supply mechanism 26 in a spiral shape along the virtual circle 24, the collar 18, the ring 23, the first guide plate 20, the second guide plate 21, and the third guide plate 22 are provided.
A helical guide mechanism 39 is constituted by the guide ring 38 and the guide ring 38 fixed to the rotating shaft 9. That is, the second and third guide plates 21.22 are provided with arc-shaped guide walls 40.41 that define the outer circumference when guiding the strip 1 along the virtual circle 24, and the guide ring 3 is provided with an inner circumference. This stipulates the following.

In FIG. 5, the first guide plate 20 includes a supply mechanism 26.
A guide collar 42 is provided to guide the strip material l supplied from the ring 23 to and from the ring 23. That is, the strip l supplied from the supply mechanism 26 is guided to a position corresponding to the second guide plate 21 through the ring 23 and the guide collar 42. This second guide plate 21 does not cover the ring 23, and the strip 1 is guided along the ring 23. The third guide plate 22 is provided with a guide flange 43 that covers the ring 23, and a portion of the guide flange 43 closer to the second guide plate 21 is inclined toward the ring 23 as it approaches the second guide plate 21 side. An inclined portion 43a is provided. Therefore, the strip material 1 that has moved along the ring 23 at a position corresponding to the second guide plate 21 is guided along the inclined portion 43a, and the end surface of the ring 23 is a plane deviated in the axial direction. It moves along the outer surface of the guide flange 43 located at. Therefore, the strip material 1 will spiral during this time.

The strip material 1 guided along the guide flange 43 is further guided along the guide member 27 of the supply mechanism 26, thereby going around the imaginary circle 24. - The band material 1 after circumference is guided to the guide collar 42 of the first guide plate 20 so as to overlap with the portion supplied from the supply mechanism 26. A guide piece 44 is fixed to a portion of the first guide plate 20 closer to the second guide plate 21, and is provided with an inclined guide portion 44a that is inclined in a direction away from the guide collar 42 in the rotation direction 19. The strip material 1 that has moved along the collar 42 is further spirally moved by the inclined guide portion 44a.

By the way, the mandrel 3 for winding the strip l to form the stator core 4 is attached to the rotating shaft 9, and the mandrel 3 is attached to the first guide plate 2.
0, and the inclined guide portion 44
The strip l guided by a is sequentially wound around a mandrel 3 rotating together with a rotating shaft 9. Furthermore, on the outer periphery of the mandrel 3, a plurality of axially extending protrusions 45 that can fit into the first notches 6 of the band material 1 are provided at intervals in the circumferential direction by fitting keys, etc. , the strip material 1 is wound around the mandrel 3 with the first notches 6 aligned.

By the way, the spiral guide mechanism 39 does not forcibly bend and guide the strip material 1, but rather guides the strip material 1 that has been forcibly bent along the virtual circle 24 and has undergone plastic deformation. , the strip 1 has a pin 13 supported on the drive shaft 11.
It is forcibly bent by This pin 13
is the second notch 8 of the strip l supplied from the supply mechanism 26
The pin 13 is engaged only within a certain angular range to cause plastic deformation of the band 1, and a cam mechanism 46 is provided to deform the pin 13.

The cam mechanism 46 has 130 pins and 15 micro bearings.
．． first and second outer circumferential cam surfaces 47.48 and first and second inner circumferential cam surfaces 49.50 that slide on the pin 13 and define the locus of the pin 13 around the axis of the rotating shaft 9;
A base cam surface 51 that slides on both axial ends of the pin 13 to define the axial displacement of the pin 13, and a base cam surface 51 that defines the axial displacement of the pin 13. second and third auxiliary cam surfaces 52,53,54.

In FIG. 6, the first outer cam surface 47 is formed on the inner circumferential surface of the collar 18, and the first inner cam surface 49 is formed on the first outer cam surface 47.
is formed on the outer circumferential surface of the ring 23 so as to face the ring 23 . These cam surfaces 47, 49 are connected to the strip material 1 fed from the feeding mechanism 27.
When the pin advances to the reference line l, the engaging portion 55 provided at one end of the pin 13 is engaged with the second notch 8, and the rotation direction 1
In the range from the reference line l to the angle α along the line 9, the band 1 is brought into sliding contact with the microbearing 15 so that it can be bent along the imaginary circle 24 while maintaining the engaged state. After passing the angle α, both cam surfaces 47 and 49 cause the engaging portion 55 of the pin 13 to disengage from the second notch 8 of the strip 1 and retreat outward, It is determined that the disengaged state is maintained until just before reaching the reference line 1, and then returns to the engaged state again at the reference line vAl.

Further, the second outer cam surface 48 and the second inner cam surface 50 are
The micro bearing 16 is defined in correspondence with the first outer cam surface 47 and the first inner cam surface 49, and is in sliding contact with the second outer cam surface 48 and the second inner cam surface 50.

That is, a flange 56 is provided on the inner surface of the cylindrical body 17 and protrudes radially inward over the entire circumference so that the drive wheel 11 is disposed between the flange 18 and the flange 56. A second outer circumferential cam surface 48 is formed on the inner circumferential surface. Further, a small-diameter cylindrical body 57 that surrounds the rotating shaft 9 and is concentric with the cylindrical body 17 is fixed to the casing 2, and a second inner circumferential cam surface 50 is formed on the outer circumferential surface of this cylindrical body 57.

In this way, the plurality of pins 1 supported on the drive wheel 11
3 rotates around the axis of the rotating shaft 9 guided by the first outer and inner cam surfaces 47, 49 and the second outer and inner cam surfaces 48, 50, and rotates from the reference line l along the rotation direction 19. A locus that can be engaged with the second notch 8 is drawn within a range up to the angle α. Moreover, the pin 13 is connected to the first outer and inner cam surfaces 47 via the micro bearings 15 and 16.
49 and the second outer and inner cam surfaces 48,50, frictional resistance is small and smooth operation is possible.

Referring also to FIG. 7, the base cam surface 51 is connected to the pin 13.
A ring-shaped base member 5 is fixed to the casing 2 and is in sliding contact with a hemispherical head 58 provided at the other end.
9. This base cam surface 51 is flat in order to maintain the axial position of the pin 13 at a position where the engaging portion 55 at one end of the pin 13 can be engaged with the second notch 8 in the range from the reference line l to the angle α. , from the angle α to the angle β, the engaging portion 55 is tilted rearward in the rotation direction 19 in order to retreat to a position where it cannot engage with the second notch 8, and further from the angle β to the angle T. It is flat in order to maintain the retracted position between, and tilts forward in the rotational direction 19 in order to advance the engaging portion 55 to a position where it engages with the second notch 8 between the angle β and the reference line l. It is formed to

The first, second and third auxiliary cam surfaces 52, 53, 54 are
The first one is in sliding contact with one end of the pin 13. They are provided on the second and third guide members 20, 21, and 22, respectively, and are formed to correspond to the base cam surface 51.

In this way, each pin 13 drawing a trajectory determined by the cam mechanism 46 engages with the second notch 8 of the band material 1 one after another at the reference line l according to the rotation of the drive wheel 11, until the angle α is reached. The band material 1 is forcibly bent along the imaginary circle 24 to cause plastic deformation, and after passing the angle α, the engaged state is released.

Next, to explain the function of this embodiment, the strip material 1 is
The strip material is fed into the feeding mechanism 26 by being sandwiched between both the band material guide plates 30 and 31 of the feeding mechanism 29 with the first notch 6 facing downward and the second notch 8 facing upward. A feed gear 32 that rotates in synchronization with the rotation of the rotating shaft 9 is the first gear of the strip material 1.
It meshes with the notch 6, and the strip l is forcibly fed into the supply mechanism 26.

In the supply mechanism 26, the fed band material 1 is supplied along the tangent line 25 toward the reference line l.

Reference line! As the drive wheel 11 rotates together with the rotating shaft 9, each pin 13 is displaced to a position where it can engage with the second notch 8 by the cam mechanism 46, and the strip material supplied from the supply mechanism 26 The engaging portions 55 of the pins 13 are successively engaged with the second notches 8 of the pins 1.

As the pin 13 engaged with the strip 1 draws a trajectory determined by the cam mechanism 46, the strip 1 is forcibly bent along the virtual circle 24 and undergoes plastic deformation between the reference NIAβ and the angle α. arise. Therefore, after the engaging portion 55 of the pin 13 disengages from the second notch 8 beyond the angle α, the strip 1 does not return to its original straight shape.

By the way, when the second notch 8 is wound up as the stator core 4, it forms the circular arc groove 7, but in order to reduce damage and improve the electrical performance of the stator core 4, the circular groove 7, that is, the second notch is It is better to make the notch 8 as shallow as possible. By the way, the second notch 8 engages the pin 13 and the strip material 1
The second notch 8 should be deep if the belt member 1 is forcibly bent and the belt member 1 is rotated by engaging the pin 13. However, the strip l is forcibly fed by the feeding mechanism 29 in synchronization with the rotation of the rotary shaft 9, that is, the movement of the pin 13, and the pin 13 has a second notch that is large enough to bend the strip l. 8. Therefore, the electrical performance of the stator core 4 can be improved by making the second notch 8, that is, the arcuate groove 7 as shallow as possible.

The plastically deformed strip 1 is guided by the spiral guide mechanism 39 into a spiral shape, and is sent from the guide piece 44 to the mandrel 3 side. As a result, the band material 1 is wound around the mandrel 3 which is rotating together with the rotating shaft 9. At this time, by fitting the protrusion 45 into the first notch 6, the strip material 1 is wound around the mandrel 3 with the first and second notches 6, 8 aligned.

When a certain amount of the strip 1 is wound around the mandrel 3, a spiral stator core 4 is formed by cutting the strip 1 with a tool such as air scissors 60 (see FIG. 1).

C0 Effects of the Invention As described above, the apparatus of the present invention includes a supply mechanism that supplies the strip in a straight line and guides the strip in a spiral shape along a virtual circle with the supply direction from the supply mechanism as the tangential direction. a spiral guide mechanism, a drive wheel whose rotation axis is the center of the virtual circle, and a second
A plurality of pins that can be engaged with the notches and are supported on the drive wheel at equal intervals in the circumferential direction and have bearings, and a second notch in the band material supplied from the guide mechanism at a constant angle along the rotational direction of the drive wheel. a cam mechanism that displaces each of the pins by sliding them on their bearings so that they are engaged only within a range; and a feeding mechanism that is connected to the feeding mechanism to forcibly feed the strip material into the feeding mechanism in synchronization with the drive wheel. Therefore, the frictional resistance caused by the movement of the pin can be reduced to smoothly wind up the band material, and the second notch can be made shallow to improve the performance of the stator core.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a simplified cutaway perspective view showing the entire device of the present invention, FIG. 2 is an enlarged front view of a strip, and FIG. I [[-1lI
Figure 4 is an enlarged cross-sectional view along the line ■-■ of Figure 3, Figure 5
The figure is a developed longitudinal sectional view of the helical guide mechanism as seen from the inner circumferential side.
The figure is a front view of the collar and the ring, and FIG. 7 is a developed vertical sectional view seen from the inner circumferential side to show the axial movement of the pin by the cam mechanism.

Claims (1)

[Claims] A plurality of first notches for forming slots on the inner periphery of the stator core and a plurality of second notches for forming arcuate grooves extending in the axial direction on the outer periphery of the stator core are provided on both sides. A stator core winding device for forming a stator core by spirally winding a supplied strip material around a center line perpendicular to a plane containing the strip material, a supply mechanism that supplies the strip material in a straight line; A spiral guide mechanism that spirally guides the strip material along an imaginary circle whose tangential direction is the supply direction from the supply mechanism, a drive wheel whose rotation axis is the center of the imaginary circle, and a second notch that engages with the drive wheel. A plurality of pins having bearings and supported on the drive wheel at equal intervals in the circumferential direction are engaged only within a certain angular range along the rotational direction of the drive wheel, and a second notch in the band material supplied from the guide mechanism. A cam mechanism for displacing each of the pins by sliding them on their bearings in order to align the pins, and a feeding mechanism connected to the feeding mechanism for forcibly feeding the strip material into the feeding mechanism in synchronization with the drive wheel. Features: Stator core winding device.