JP2908759B2 - Winding method of outer rotor type motor and winding machine therefor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of winding a wire around a core of an outer rotor type motor mounted on a magnetic medium such as a hard disk, a floppy disk, and a CD-ROM of a computer, and a winding machine therefor.

[0002]

2. Description of the Related Art As a winding machine for winding a wire around a winding pole serving as a magnetic pole of an outer rotor type motor,
As shown in FIGS. 6 and 7, a hollow rotating shaft S driven to rotate by an electric motor, a turning boss B connected to and rotating with the rotating shaft S, and fixed to be inclined with respect to the rotating shaft S. A structure having a nozzle N is known (Japanese Patent Laid-Open No.
3-57475).

[0003] The wire W is passed through each shaft hole of the rotating shaft S, the turning boss B and the nozzle N, and is pulled out from the tip of the nozzle N. The tip of the nozzle N faces the slot of the outer rotor type motor M, and the wire W is wound by the nozzle N turning around the axis as the rotation axis S rotates.

[0004] The nozzle N is attached to a nozzle holder H, and the nozzle holder H is fixed to the turning boss B at a predetermined angle with respect to the rotation axis S, so that the inclination angle of the nozzle N is determined. The turning boss B is supported by the arms A on both sides, and reciprocates in a predetermined relationship with the rotational driving of the electric motor by the driving of the stepping motor and the screw motion of the ball screw C.

[0005]

On the other hand, in order to achieve miniaturization and high density of hard disk drives, floppy disk and CD drives, the number of magnetic poles of an outer rotor type motor increases, and the slot width increases accordingly. Tend to be narrow.

However, in the above-described conventional winding machine, the tip of the nozzle in the winding draws a true circular locus about the winding axis of the winding pole. Therefore, when the slot width becomes narrower than a certain length, the track of the nozzle overlaps with the coil already wound on the adjacent winding pole, and even if the outer diameter of the nozzle is smaller than the minimum width of the slot, the wire can be wound. become unable. On the other hand, if the number of turns of the coil is reduced, the diameter of the perfect circle can be correspondingly reduced, but this is against the densification of the coil. SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a winding method and a winding machine for enabling winding of an outer rotor type motor having a large number of magnetic pole divisions.

[0007]

In order to achieve the object, a winding method according to the present invention comprises passing a wire through a shaft hole of a nozzle which is turned by a driving force transmitted via a rotating shaft,
In the method of winding the wire around the outer rotor type motor while turning the nozzle while moving the tip of the nozzle into and out of the slot of the outer rotor type motor, the end of the nozzle is an endless trajectory long in the direction perpendicular to the main surface of the motor It is characterized in that the nozzle is turned so as to draw a circle. For example, the trajectory of the nozzle is regulated by a cam similar in shape to the endless trajectory.

[0008] A winding machine suitable for this winding method is a winding machine in which a wire is passed through a shaft hole of a nozzle, the nozzle is turned by a driving force transmitted via a rotating shaft, and the wire is wound around an outer rotor type motor. In the machine, the cam mechanism that regulates the trajectory of the nozzle and the cam mechanism that centers on the axis perpendicular to the rotation axis so that the tip of the nozzle draws an endless trajectory that is long in the vertical direction with respect to the main surface of the motor. And a swing mechanism for swingably supporting the nozzle in response to the change.

According to the winding method of the present invention, the tip of the nozzle is not a perfect circle as in the past, but is an endless trajectory long in the direction perpendicular to the main surface of the motor, for example, an ellipse, an ellipse or a chamfer. Draw a rectangular locus. That is, the nozzle rotates around the winding pole, but eccentrically moves so as not to collide with the adjacent coil. Therefore, the slot width can be made smaller than in the case of the conventional perfect circular motion.

According to the winding machine of the present invention, the orbit of the nozzle is regulated by the cam mechanism and kept constant. And, despite the fact that the nozzle is forcibly moved eccentrically by the cam mechanism, the nozzle is turned without exerting an undue burden or distortion on each part of the power transmission mechanism from the rotating shaft to the nozzle by the action of the swing mechanism. I do. Therefore, winding can be performed at high speed as in the case of the perfect circular motion.

Here, the cam mechanism is, for example, a cam having a guide surface similar in shape to the trajectory of the tip of the nozzle, a nozzle holder for supporting the nozzle so as to be displaceable in its axial direction, and rotatably fixed to the nozzle holder. And a cam follower that rolls on the guide surface of the cam.

The swing mechanism is, for example, a link pin fixed perpendicularly to the rotation axis so as to be rotatable about the axis, one end of which is connected to the rear end of the nozzle, and pivots about the rotation axis with the rotation of the rotation axis. A linear motion guide having a flat surface, and a nozzle holder having a guide plane that supports the nozzle so as to be displaceable in the axial direction thereof and slides with the plane of the linear motion guide with a link pin as a fulcrum. Things.

When the cam follower rolls on the guide surface of the cam, the nozzle fixed to the nozzle holder together with the cam follower also moves endlessly integrally with the cam follower. The nozzle holder for fixing the cam follower moves linearly along the linear motion guide with the link pin as a fulcrum during turning. Accordingly, the cam follower moves eccentrically following the change in the distance between the guide surface of the cam and the center of the rotating shaft, despite the fact that the cam follower is rolled by driving one rotating shaft. Thus, when the cam has, for example, an elliptical or chamfered rectangular guide surface, the nozzle makes an endless eccentric movement about the elliptical or chamfered rectangle.

[0014]

Embodiments of the present invention will be described with reference to the drawings. 1 is a partially cutaway perspective view showing a winding machine of the present invention, FIG. 2 is an enlarged perspective view of the same main part, FIG. 3 is a partially cutaway view of the winding machine of FIG. FIG. 5 is a perspective view showing a nozzle tip and an outer rotor type motor when winding is performed, and FIG. 5 is a schematic view of a locus of the nozzle.

The winding machine 1 includes a spindle box 2, a drive table 3, and rails 4 for guiding these to run in the direction of the rotation axis. The drive table 3 drives a feed motor (not shown) so that its driving force is transmitted via a ball screw (not shown) in the rail 4 and reciprocates on the rail 4 together with the screw motion of the ball screw. The spindle box 2 reciprocates on the rail 4 by an air cylinder (not shown).

A spindle 5 penetrates through the spindle box 2 in the same direction as the rail 4, and is rotatably supported by a front bearing 21 and a rear bearing 22. A timing pulley (not shown) is attached to the spindle 5, and a main drive motor 51 in the spindle box 2 is provided.
Is transmitted to the belt via the timing pulley, and the spindle 5 rotates about the axis. A turning boss 6 is integrally fixed to the front end of the spindle 5. Turning boss 6
Has an integral bracket 61 protruding forward from the eccentric position of its front end face. An opening 62 communicating with the outside is provided on the side opposite to the bracket 61, and a guide fitting 63 for passing a wire in front of the opening 62 is provided.

A hollow slide rotating shaft 7 penetrates the centers of the spindle 5 and the turning boss 6, and is fixed so as to be slidable in the axial direction. The rear end of the slide rotation shaft 7 is further supported by a bearing 31 of the drive table 3. On the other hand, the front end of the slide rotating shaft 7 protrudes from the front end surface of the turning boss 6 so as not to contact the bracket 61.
The hollow portion of the slide rotation shaft 7 is a shaft hole 71 for passing a wire, and communicates with the opening 62 of the turning boss 6. Between the spindle box 2 and the drive table 3,
Two springs 52, 52 (one shown in the figure) are attached in parallel with the rail 4.
The elastic forces of the slide rotation shafts 7 and 2 are balanced with each other.
The linearity of the slide track is maintained.

On the front surface of the spindle box 2, four cam mounting columns 81 are set up so as to surround the turning boss 6 and the slide rotating shaft 7. An annular cam 8 is fixed to the tip of the cam mounting column 81.
The cam 8 has, at its center, a line-symmetrical elliptical hole having a horizontal linear portion, and the inner and outer peripheral surfaces of an edge 82 protruding toward the spindle box 2 along the periphery of the hole serve as a guide surface.

A link pin 9 is fixed to the front end of the slide rotating shaft 7 via a linear bush 72 so as to be rotatable about the shaft and reciprocally movable in the axial direction.
The link pin 9 has a nozzle 92 at an end different from the bracket 61 side through a joint block 91.
Are fixed at an acute angle with the link pin 9. The nozzle 92 is further supported by a nozzle holder 93 via a linear bush 94 so as to be able to reciprocate in the inclined direction. The nozzle holder 93 has a plane on the spindle box 2 side in a direction not intersecting with the slide rotation shaft 7. On the other hand, a linear motion guide 9
The linear motion guide 95 is also formed with a plane that does not intersect with the slide rotation shaft 7. And
The plane of the nozzle holder 93 slides with respect to the plane of the linear guide 95. Accordingly, the nozzle holder 93 swings together with the nozzle 92 while being guided by the plane of the linear motion guide 95 with the link pin 9 as a fulcrum. A pair of inner and outer cam followers 83 and 84 are further rotatably fixed to the nozzle holder 93 on the opposite side of the spindle box 2 with the edge 82 of the cam 8 interposed therebetween. Therefore, the cam follower 8
3, 84 are guided by the inner and outer peripheral surfaces of the edge 82 and roll.

Next, the operation of the winding machine 1 when winding a wire around the outer rotor type motor M using the winding machine 1 will be described. By operating an air cylinder (not shown), the spindle box is advanced toward the outer rotor type motor M and stopped at the position of the stopper 23. Thereby, the position of the cam 8 is determined. The wire is passed through the shaft hole 71 of the slide rotation shaft 7, the opening 62 of the revolving boss 6, the guide fitting 63, and the shaft hole of the nozzle 92 in this order, and the tip is fixed to the base of the pole P of the outer rotor type motor M.

When the main drive motor 51 is driven to rotate the spindle 5, the turning boss 6 including the bracket 61, the nozzle 92 and the nozzle holder 93 are moved to the spindle 5.
Rotates with. At this time, the cam followers 83, 84
Rolls on the guide surface of the cam 8, so that the cam follower 8
The movement of the nozzle 92 fixed to the nozzle holder 93 together with 3 and 84 is regulated by the guide surface of the cam 8 similarly to the cam followers 83 and 84. On the other hand, the cam follower 83,
The nozzle holder 93 for fixing the 84 can linearly move in a direction intersecting the rotation axis along the linear motion guide 95 with the link pin 9 as a fulcrum during turning. Accordingly, the cam follower moves eccentrically following the change in the distance between the guide surface of the cam 8 and the center of the rotating shaft, despite the fact that the cam follower rolls by driving one rotating shaft.

Therefore, as shown in FIG. 5, the tip of the nozzle 92 makes an endless eccentric movement similar to the guide surface of the cam 8.
However, the nozzle 92 is located at a diagonal position of the cam followers 83 and 84 to improve the rotational balance.
Therefore, although the trajectory of the tip of the nozzle 92 is similar to the guide surface of the cam 8, the trajectory of the nozzle 92 is π / 2 radians and has a vertically long shape. For example, when the cam follower is running at the center of the linear portion of the guide surface of the cam 8, the tip of the nozzle 92 is at the vertex of the arc. That is, the trajectory of the tip of the nozzle 92 is the outer rotor type motor M
Is an endless ring that is long in the direction perpendicular to the main surface of the.

Then, with the rotation of the nozzle 92, the wire W is drawn into the shaft hole 71 of the slide rotating shaft 7 from the guide pulley 32 on the back of the drive table 3, and is drawn out from the tip of the nozzle 92. The derived wire W is wound around the pole P in the turning direction of the nozzle 92. The angular velocity of the main drive motor 51 and that of the feed motor (not shown) are controlled so as to maintain a predetermined relationship, and the drive table 3 slides at a constant speed based on the number of turns of the wire W with respect to the pole P. Retreat with 7
Accordingly, the nozzle 92 also moves backward. When the wire W reaches the tip of the pole P, the feed motor rotates in the reverse direction to move the nozzle 92 forward. In this manner, the nozzle 92 winds the wire W while repeating the reciprocating motion with respect to the pole P, and after completing the winding of the specified number of turns, the outer rotor type motor is indexed and rotated, and the winding of the adjacent pole is wound. Start.

As described above, according to the winding machine 1, since the nozzle 92 turns in a direction perpendicular to the main surface of the outer rotor type motor M along an endless annular trajectory, the nozzle 92 draws a circle. In the conventional winding machine that rotates, the slot width D
The wire can be wound around the outer rotor type motor which was too narrow to be wound.

[0025]

According to the present invention, a wire can be wound around an outer rotor type motor having a narrow slot width, which greatly contributes to downsizing of the outer rotor type motor and a device to which the motor is mounted.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing a winding machine according to an embodiment.

FIG. 2 is an enlarged perspective view of a main part of the winding machine.

FIG. 3 is an axial sectional view of the winding machine.

FIG. 4 is a perspective view showing a state in which a wire coming out of a nozzle is wound around a pole of an outer rotor type motor.

FIG. 5 is a diagram showing a trajectory of a nozzle.

FIG. 6 is a front view showing a conventional winding machine.

FIG. 7 is a sectional view taken along line XX of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer rotor type motor winding machine 2 Spindle box 3 Drive table 4 Rail 5 Spindle 6 Revolving boss 7 Slide rotation axis 8 Cam 9 Link pin 92 Nozzle 93 Nozzle holder 95 Linear guide M Outer rotor type motor P Pole W Wire

Claims (7)

(57) [Claims] 1. A wire is passed through a shaft hole of a nozzle which is turned by a driving force transmitted via a rotating shaft, and while the tip of the nozzle is moved into and out of a slot of an outer rotor type motor, the wire is turned with the turning of the nozzle. A method for winding an outer rotor type motor, wherein the nozzle is turned so that a tip of the nozzle draws a long endless trajectory in a direction perpendicular to a main surface of the motor. 2. The winding method according to claim 1, wherein the trajectory of the tip of the nozzle is regulated by a cam having a similar shape to the endless trajectory. 3. A winding machine in which a wire is passed through a shaft hole of a nozzle, and the wire is wound around an outer rotor type motor by rotating the nozzle by a driving force transmitted through a rotating shaft. A cam mechanism that regulates the trajectory of the nozzle and a nozzle that swings around the axis perpendicular to the rotation axis according to the regulation by the cam mechanism so as to draw an endless trajectory that is long in the direction perpendicular to the main surface. A winding machine for an outer rotor type motor, comprising: a swing mechanism; 4. A cam mechanism having a guide surface similar in shape to a locus of a tip of a nozzle, a nozzle holder for supporting the nozzle so as to be displaceable in a nozzle axis direction, and rotatably fixed to the nozzle holder. The winding machine according to claim 3, comprising a cam follower that rolls on a guide surface of the cam. 5. The swing mechanism is fixed to a rotation axis perpendicular to a rotation axis so as to be rotatable about the axis, one end of which is connected to a rear end of the nozzle, and is rotatable about the rotation axis with rotation of the rotation axis. And
A linear motion guide having a flat surface, and supporting the nozzle so as to be displaceable in its axial direction;
The winding machine according to claim 3, comprising a nozzle holder having a guide plane that slides on a plane of the linear motion guide with the link pin as a fulcrum. 6. The winding machine according to claim 4, wherein the nozzle holder supports the nozzle so that the nozzle is inclined at a predetermined angle with respect to the rotation axis. 7. The rotating shaft and the link pin are both slidable in the respective axial directions, and the link pin slides with the sliding of the rotating shaft, and the nozzle is simultaneously displaced in the axial direction. Winding machine.