JPH08251880A - Winder for stator core - Google Patents

Abstract

PURPOSE: To increase the winding speed of a winding to the inner tooth of a stator core, while materializing low vibration and low noise. CONSTITUTION: A rocking sleeve 23 is engaged by spline to the guide tube 12 leading a lead wire to be wound on the inner tooth of a stator core, and a forked cam follower 27 is attached to one side of this rocking sleeve 23, and the cam follower 27 is held by the cam 26 provided in circular form at the cam shaft 24 arranged in the direction orthogonal to the guide tube 12. In this cam 26, cam curved line parts 26a for rocking the guide tube 12 and cam straight line parts 26b for stopping the guide tube 12 and providing for the next inversion are made alternately in succession. The cam shaft 24 rotates synchronously with a reciprocation part for reciprocating the guide tube 12 in axial direction. The cam 26 rotates always in fixed direction, and besides since the cam follower 27 are always abutting on the cam 26, the rocking of the guide tube 12 are always smooth.

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 the inner teeth of the stator core to form a coil.

[0002]

2. Description of the Related Art As a coil forming device for a stator core, there are a direct winding method in which the inner teeth of the stator core are directly wound to form a coil, and a conductor is wound in advance in a form to form a coil, and the coil is cured. A method using a coil insertion device that is inserted into the inner groove of the stator core by a tool is known.
The direct-winding method has a drawback that workability is poor as compared with a method using a coil insertion device, but has a merit that good performance can be obtained because a length of a loop protruding from an end surface of a stator core is short. .

As a winding device for a stator core that employs the above-described series winding method, the present applicant has disclosed in Japanese Patent Laid-Open No. 21556/1990 that a guide cylinder for supplying a conductor wire to be wound around the inner teeth of the stator core is provided with a crank mechanism. The guide cylinder is reciprocally moved through the guide cylinder, and the guide cylinder is swung by the reciprocating motion of a rack arranged in a direction orthogonal to the guide cylinder through a pinion axially attached to the guide cylinder. We have proposed a technique for winding the conductor wire delivered from the nozzle around the inner teeth of the stator core.

[0004]

However, in the above-described conventional winding device, since the guide cylinder is rocked by the reciprocating motion of the rack, the backlash between the rack and the pinion reverses the guide cylinder. It easily becomes a source of vibration and noise when the guide cylinder is oscillated, which is an obstacle to continuous and high-speed rocking of the guide cylinder.

Therefore, an object of the present invention is to wind the stator core winding device capable of continuously and smoothly swinging the guide cylinder, reducing vibration noise, and increasing the speed. To provide.

[0006]

In order to achieve the above object, a winding device for a stator core according to the present invention has a guide cylinder for delivering a conducting wire introduced from one side from a nozzle provided in the other side, and the guide cylinder as an axis. A reciprocating part that reciprocates in the direction, and a swing part that swings the guide cylinder in the axial direction by a set angle. The nozzle faces the stator core and the guide cylinder reciprocates and swings to cause the nozzle to move. In a winding device for a stator core in which a conductor wire provided from a coil is wound around an inner tooth of a stator core to form a coil, the swinging portion is arranged in a direction orthogonal to the guide cylinder,
A cam shaft that rotates in synchronization with the reciprocating portion, a cam that is formed circumferentially on the outer periphery of the cam shaft, and allows the guide cylinder to move in the axial direction so that it engages with the rotation of the guide cylinder. And a cam follower that is provided on the rocking sleeve and that engages with the cam. The cam is a cam that rocks the guide cylinder. When the cam follower is positioned on the cam straight part, the nozzle forms the stator core when the curved part and the cam straight part that temporarily stops swinging when reversing are continuous. It is characterized in that it is set so as to pass through the inner groove.

[0007]

According to the present invention, the nozzle provided on the other side of the guide cylinder faces the inner circumference of the stator core, and the nozzle is wound around the inner teeth of the stator core by the reciprocating portion and the swinging portion of the guide cylinder. By operating in this manner, the conductive wire supplied from the nozzle is wound around the inner teeth to form a coil.

In this case, the cam shaft arranged orthogonal to the guide cylinder is rotating in synchronization with the reciprocating motion part,
A cam curved portion and a cam straight portion are alternately formed on the cam provided in a circular shape on the outer periphery of the cam shaft.

When the cam follower provided on the guide cylinder via the swinging sleeve is on the cam curved portion, the nozzle projects from the end surface of the stator core, and the guide cylinder is pressed by the cam follower. The nozzle is rotated in the axial direction, and the nozzle is rotated.

When the cam follower is in the straight portion of the cam, the swinging of the guide cylinder is stopped, and the nozzle passes through the inner groove of the stator core in the axial direction by the reciprocating motion of the reciprocating motion unit. To do.

As described above, since the rotation of the cam and the cam follower is always constant and the cam follower is always in contact with the cam without backlash, the guide cylinder can be swung continuously and smoothly. As a result, low vibration and low noise can be realized, and the winding speed of the conductive wire can be further increased.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 3, the stator core 1 used in this embodiment is used in, for example, a DC brushless motor, and a plurality of inner teeth 2 are formed on the inner periphery of the stator core 1 at regular intervals. An inner groove 3 is formed between the teeth 2.
In the winding device A shown in FIG. 1, the conductor wire 4 is wound around the inner tooth 2 to form the coil B.

As shown in FIG. 1, the winding device A is surrounded by a frame 11, and a guide cylinder 12 is penetrated in the vertical direction of the drawing. The guide cylinder 12 is slidably supported in the vertical and rotational directions via bearings 13 and 14 fixed to the lower surface and the upper surface of the frame 11. Introducing port 1 into which the above-mentioned conducting wire 4 is inserted at the lower end of this guide tube 12.
2a is opened, and a header 15 is attached to the upper end. A nozzle 15a is opened on the side surface of the header 15,
The conducting wire 4 introduced from the introducing port 12a and guided in the guide cylinder 12 is delivered from the nozzle 15a and wound around the inner teeth 2 of the stator core 1.

Further, inside the frame 11, there is provided a reciprocating chamber 11a having a reciprocating chamber 16a for reciprocating the guide cylinder 12 in the vertical direction in the drawing, and an upper part of the reciprocating chamber 11a. An oscillating chamber 11b is formed which houses an oscillating portion 17 for oscillating the guide cylinder 12 in the axial direction.

The rotary shaft 18 of the reciprocating part 16 is shown in FIG.
Is extended to the back of the paper surface of the
Similarly, they are continuously provided via a timing belt (not shown), and a crank 19 is pivotally attached to the tip of the rotary shaft 18. On the other hand, the reciprocating chamber 11a is provided with guide rails 20 on both sides of the guide cylinder 12, and the guide cylinder 12 is penetrated and fixed in the center of a slider 21 slidably supporting the guide rail 20 on both sides. Further, the slider 21 and the crank 19 are connected to each other via a crank arm 22.

A bracket 11c is erected on the oscillating chamber 11b, and the oscillating sleeve 23 of the oscillating portion 17 is rotated on the bracket 11c by the bracket 11c erected on the oscillating chamber 11b. It is freely supported and spline-engaged with the guide cylinder 12. Further, in the swing chamber 11b, a cam shaft 24 extends in a direction orthogonal to the guide cylinder 12 (in FIG. 1, a direction from the front side to the back side of the paper surface), and the cam shaft 24 is provided with a timing belt (not shown). It is connected to the rotary shaft 18 via the rotary shaft 18 and is synchronously rotated.

As shown in FIG. 2, a cam sleeve 25 is mounted on the cam shaft 24, and a cam 26 is formed on the cam sleeve 25. The cam 26 is formed in a circular shape on the outer circumference of the cam sleeve 25, and the cam curve portions 26a and the cam straight portions 26b are alternately continuous. A pair of cam followers 27, which are bifurcated on the swing sleeve 23, are in sliding contact with the cam 26. The pair of cam followers 27 hold the tapered ribs 26c of the cams 26 in a constant contact with each other, that is, in a state of zero backlash, and are always restrained with respect to the cams 26. In this case, the cam shaft 24 is
By moving the cam 26 in the direction of the arrow A, the backlash between the cam 26 and the cam follower 27 can be removed.
Even if the backlash is 0, the cam 26 and the cam follower 2
Since the direction of rotation with 7 is one direction, it can rotate.

FIG. 4 shows the swing timing of the cam 26. In this embodiment, the swing angle of the guide cylinder 12 (the angle straddling the internal teeth 2 in FIG. 3) is 60 °, and the allocation angle of the cam curved portion 26a is 120 ° with respect to the rotation angle of the cam shaft 24. Set the allocation angle of the cam straight line portion 26b to 60 °, and set the cam shaft 24
One cycle is completed for each rotation of. That is, the guide cylinder 12 swings when the cam follower 27 is on the cam curved portion 26a, stops when the cam follower 27 is on the cam linear portion 26b, and the conductor 4 is wound around the inner teeth 2 once when one cycle is completed. It

Next, the winding operation on the stator core 1 by the winding device A will be described. When the rotary shaft 18 of the reciprocating motion unit 16 is rotated by a driving device via a timing belt (neither is shown), a crank 19 fixed to the rotary shaft 18 is rotated, and a crank arm 22 is attached to the crank 19. Both sides of the slider 21 continuously provided via the guide rails 20 are supported by the guide rails 20 and reciprocate in the vertical direction in the drawing. On the other hand, the rotation of the rotary shaft 18 is performed by the cam shaft 2 of the swinging unit 17 via a timing belt (not shown).
4 is transmitted. Therefore, the cam shaft 24 rotates synchronously with the rotary shaft 18. When the cam shaft 24 rotates, the cam 26 formed on the outer circumference of the cam sleeve 25 pivotally mounted on the cam shaft 24 causes the cam follower 27 mounted on the swing sleeve 23 pivotally mounted on the guide cylinder 12 to be mounted. The guide tube 12 is swung via the guide tube 12.

As shown in FIG. 2, the cam follower 27 provided on the rocking sleeve 23 that is spline-engaged with the guide cylinder 12 is at the position of the cam linear portion 26b of the cam 26 (the position at the left end in FIG. 4). At this time, the swing of the guide cylinder 12 is stopped, and when the cam shaft 24 rotates from here, the cam follower 27 engages with the cam curve portion 26a, and the guide cylinder 12 is guided by the cam curve portion 26a. , In the counterclockwise direction in the figure (in FIG. 4, the swing angle increases). When the set swing angle is reached, the cam follower 27 rolls on the cam linear portion 26b on the opposite side of the cam 26, so that the swing of the guide cylinder 12 is stopped. When the cam shaft 24 further rotates and the cam follower 27 rolls on the cam curve portion 26a on the opposite side, the rotation direction of the guide cylinder 12 is reversed, and the first direction (the swing angle in FIG. 4). In the direction of decreasing), and returns to the initial position to complete one cycle. Since the cam follower 27 always holds the taper rib 26c of the cam 26, there is no backlash, and therefore the guide cylinder 1
Even if the rotation direction of 2 is reversed, the generation of noise vibration can be suppressed. The cam follower 27 is connected to the cam 2
6, the guide cylinder 12 is reciprocated in the vertical direction of FIG. 1 by the reciprocating motion part 16, and when it is at the cam curve part 26a, the nozzle 15a is It is exposed to the outside of the end surface of the stator core 1.

As a result, the reciprocating section 16 and the swing section 1
When the rotating shaft 18 and the cam shaft 24 make one rotation by the synchronous rotation with 7, the conducting wire 4 delivered from the nozzle 15a of the header 15 mounted on the guide cylinder 12 is rotated.
Is wound around the inner teeth 2 of the stator core 1 once, and this is repeated a predetermined number of times to form the coil B.

As described above, the rotation of the cam 26 is directly transmitted to the guide cylinder 12 via the cam follower 27, and the rotation of the cam 26 and the cam follower 27 is always in a constant direction, so that the guide cylinder 12 is swung smoothly. Can be made. Further, since the taper rib 26c of the cam 26 is constantly sandwiched by the pair of cam followers 27, there is no backlash, noise vibration is suppressed, and the winding speed of the conductor wire can be further increased.

[0023]

As described above, according to the present invention,
A cam follower, which is provided on the guide cylinder via a swing sleeve, is formed around the outer circumference of the cam shaft and constantly contacts the cam, so that the guide cylinder swings while the cam shaft always rotates in a fixed direction. The guide tube can be swung continuously and smoothly. As a result, low vibration and low noise can be realized, and the winding speed of the conductor wire can be further increased.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a winding device according to the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is an explanatory view showing a manner of winding around a stator core in the winding device according to the present invention.

FIG. 4 is a diagram showing a swing timing of a cam according to the present invention.

[Explanation of symbols]

 A winding device B coil 1 stator core 2 inner tooth 3 inner groove 4 conducting wire 12 guide cylinder 15a nozzle 16 reciprocating part 17 swing part 23 swing sleeve 24 cam shaft 26 cam 26a cam curve part 26b cam straight part 27 cam follower

Claims (1)

[Claims] 1. A guide tube (12) for delivering a conducting wire introduced from one side through a nozzle (15a) provided on the other side, and a reciprocating motion section (16) for reciprocating the guide tube (12) in an axial direction. The guide tube (12) is provided with an oscillating portion (17) for oscillating the guide tube (12) in the axial direction by a set angle, the nozzle (15a) faces the stator core (1), and the reciprocating operation of the guide tube (12) and In a winding device for a stator core in which a conducting wire (4) delivered from the nozzle (15a) by oscillating is wound around internal teeth (2) of a stator core (1) to form a coil, the oscillating portion (17) is A cam shaft (24) arranged in a direction orthogonal to the guide cylinder (12) and rotating in synchronization with the reciprocating motion part (16), and a cam formed on the outer periphery of the cam shaft (24) in a circular shape. (26) and the guide tube (
2) A swinging sleeve (23) arranged on the outer periphery of the guide tube (12) so as to allow the movement in the axial direction and engage with the rotation of the guide tube (12), and the swinging sleeve (23). The cam (26) is provided on the sleeve (23) and engages with the cam (26), and the cam (26) swings the guide tube (12) to form a cam curve portion (26a). ) And a cam straight line portion (26b) that temporarily stops swinging during reversing are formed in a circular shape, and when the cam follower (27) is located on the cam straight line portion (26b). The nozzle (1
5a) is set so as to pass through the inner groove (3) of the stator core (1), and a winding device for the stator core.