JP3120124B2 - Electric motor winding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor winding device having a structure in which a wire loop is wound directly around an iron core by a nozzle.

[0002]

2. Description of the Related Art An electric motor generally has an iron core having a number of comb-like teeth extending toward an axis to form a void portion called a slot.
A winding bundle formed by a wire loop is inserted and mounted from the axial direction using the opening of the slot. Such a winding structure can be formed by forming the winding bundle itself at a high speed by a fryer in a separate process and inserting it into a slot in the axial direction, so that quality, simplification of the process, manufacturing time, etc. It is an advantageous electric motor and occupies the mainstream of the electric motor manufacturing method. However, such a winding installation,
There is a problem that the end of the winding protrudes largely from the axial end face of the iron core and the dimension in the axial direction increases. In addition, such a winding end does not generate an effective magnetic flux in the iron core, causes a resistance loss, and is a useless winding that generates heat. Therefore, an electric motor in which a wire loop is wound directly around a yoke, that is, a toroidal winding is attempted, and a great effect is obtained by reducing waste in the winding and reducing the axial dimension. However, such motors also have some problems. In order to wind the winding around the ring-shaped yoke, it is not easy to apply the winding unless the yoke is divided, and this division of the iron core is not preferable in manufacturing. For example, there are troubles in joining the divided cores and disturbance in magnetic resistance at the joining portion. In particular, if the stator core is split to wind the winding, it can be wound at a high speed, but the winding is exposed so as to protrude outside the stator core. The wire could be damaged. Also, since the winding reaches the outside of the stator core, if there is a magnetic substance such as iron on the outside, there is a problem that leakage of magnetic flux occurs and torque is reduced, and the winding is radially outside. Since the frame is exposed, the configuration of the frame is limited to molding using a member such as a premix.

[0003] Therefore, an electric motor as described in Japanese Patent Application Laid-Open No. 63-110927 has been tried. In this electric motor, slots having different depths are formed in the inner periphery of a ring-shaped yoke portion in the radial direction, and a wire loop is directly wound around the tooth portion. In this case, the wire loop can be wound without dividing the stator core,
There is no disturbance of magnetic flux and the effect can be expected by reducing vibration and noise. However, when compared with the above-described electric motor using the toroidal winding method, a remarkable difference occurs in winding. That is, when the stator core is divided and the wire loop is wound around the yoke, the wire loop can be wound at a high speed of about 2,000 revolutions / minute by the fryer. However, Japanese Patent Application Laid-Open No. 63-11092
In the electric motor described in Japanese Patent Application Laid-Open No. 8-208, a rod-shaped tool called a nozzle must be rotated directly around the winding portion on the winding portion formed inside the yoke portion, and the flyer As described above, the locus of rotation does not form a perfect circle in a well-balanced manner, and must be rotated in a rectangular wave shape. of course,
Even in such a winding method, there is a measure for improvement, and an elliptical orbit can be used to approach high-speed rotation like a flyer. However, even in that case, the rotation of the fryer cannot be compared with the rotation of the fryer due to the balance.
The number of revolutions / minute required a very long time for the winding operation. Moreover, if the nozzle is rotated faster, the wire loop is pulled out at a right angle from the tip of the nozzle,
In this part, the wire loop is subjected to great friction, and the wire loop is damaged. For this reason, since it is necessary to minimize the damage to the wire loop, a nozzle 4 for winding the wire loop 3 around the slot 2 formed by the tooth portion 1 as shown in FIG. And a flange 8 having a large outer diameter to form a curved portion 7 so that the wire loop 6 cannot be bent at a right angle. However, such a large outer diameter flange 8
Travels inside the slot 2, space is required for the running of the collar 8 inside the slot 2 formed for the winding 3. Therefore, a large ineffective space generated due to the running of the flange 8 is formed in the slot 3 after the winding of the wire loop. In particular, in order to enlarge the curved portion 5 for protection of the wire loop 6, it is necessary to enlarge the flange 8, and inevitably the ineffective space of the slot 2 becomes large.
Even if the rotation speed of the motor is increased, the ineffective space of the slot 2 increases, and an inefficient motor is formed.

[0004] The present invention has been made in view of such circumstances, and a reasonable winding of a motor can be obtained in which a wire can be directly wound around an iron core by a nozzle, and a motor having less vibration and noise can be obtained . It is intended to provide a device .

[0005]

SUMMARY OF THE INVENTION The present invention provides a ring-shaped iron.
In a winding device for an electric motor, a plurality of slots are formed by a plurality of teeth extending in a comb shape from the inner peripheral portion of the core, and the wire is wound directly between the teeth through the slots. A nozzle extending into the slot for winding ,
It is arranged on the inner diameter side of the iron core and is configured to rotate the outer periphery of the tooth portion. The tip of the nozzle extending to the slot is bent into an L shape, and the curved portion of the hole formed inside is enlarged. And pull out the wire loop to set a ring-shaped guide.
Only the nozzle along the inner periphery of this guide is against the periphery of the teeth
The problem is solved by running without touching .

[0006]

[Operation] Since the tip of the nozzle is bent in an L-shape, the inner hole through which the wire loop of the nozzle passes can be greatly curved at the L-shaped portion, and when the wire loop is pulled out from the nozzle, Being bent along a large curve without being bent at a right angle, the insulation applied to the outer surface of the wire loop is not damaged, and the running speed is increased without causing damage to the wire loop. In addition to being able to increase the winding speed, it is also possible to reduce defects such as layer short-circuits occurring between the wires.

[0007] In addition, to providing a-ring-shaped guide
The nozzle moves around the teeth without contact
be able to.

[0008]

FIG. 1 is a longitudinal sectional view of a main part of a winding device used in a method of manufacturing an electric motor according to the present invention.

FIG. 2 is a longitudinal sectional view of a main part showing a nozzle guide.

FIG. 3 is a perspective view of the nozzle.

FIG. 4 is a plan view of a main part showing a state where a wire loop is formed on the iron core of the electric motor.

FIG. 5 is a perspective view showing the stator core after the wire loop is wound.

FIG. 6 is a longitudinal sectional view of a main part showing a state in which a nozzle is wound around a wire by the method of manufacturing a motor according to the present invention.

FIG. 7 is a longitudinal sectional view of a main part of a nozzle used in the present invention.

In FIG. 1, the winding device used in the present invention has a core 9 mounted on a turntable 10 which can support and rotate the core 9 of the electric motor. A shaft 11 is inserted through the inner diameter side of the iron core 9 from the axial direction.
Nozzle 12 is provided at right angles to 1. Further, a wire loop 14 forming the winding 13 is connected to the nozzle 1 from below the shaft 11.
2, and is configured so that the nozzle 12 rotates and forms a slot 16 formed by the teeth 15 of the iron core 9. The shaft 11 is configured to move up and down by a crank device 17 and to rotate at a fixed angle by a rotating device 18.
The nozzle 12 is configured to rotate around the outer periphery of the tooth portion 15 by synchronizing. Drive sources 17a, 18a, 10 for the crank device 17, the rotation device 18, and the turntable 10
“a” can electrically control the rotation angle of a stepping motor or the like, and the winding applied to the tooth portion 15 is configured to be continuously performed on the iron core 9. The nozzle 12 is provided with a cam 19, which is configured to be moved in the axial direction of the iron core 9 by the operation of the cam 19. Such a movement of the nozzle 12 is not always necessary, but can change the winding position of the wire loop 14 in the axial direction.
If the wire loop 14 is wound continuously in a different slot or continuously at a fixed position, the wire loop 14 partially forms a mountain shape. Guide 2 is parallel to axis 11
The guide 20 has a rail shape on the inside and guides the rotation angle of the nozzle 12.

In FIG. 2, a guide 20 for the nozzle 12 is shown.
Is formed in a rail shape on which a moving member 21 provided on the nozzle 12 moves, and is configured such that the nozzle 12 can travel up and down a slot 16 formed by the tooth portion 15. The learning member 21 is formed to be long in the same direction as the tip portion of the nozzle 12, and
1 is configured to travel in parallel with the guide 20 so that the tip of the nozzle 12 bent in an L-shape can travel inside the slot 16 without contacting the teeth 15. In FIG. 3, the nozzle 12 is configured such that a tip end 22 is bent in an L-shape, and a hole 23 from which the wire loop 14 is drawn out is largely bent in an L-shaped portion (not shown). . A driving member 21 is provided near the shaft 11 and extends in a direction in which the tip 22 is bent in an L-shape. In addition, the nozzle 12 has a long handle portion 24 so as to obtain rigidity in the traveling direction and travel without contacting the opening of the narrow slot 16.
Is flattened, and a rear end 25 is formed in a shaft shape so as to be rotatable, and a groove 26 is formed to prevent the cam 19 from operating and coming off the shaft 11. In FIG. 4, the iron core 9 has a plurality of teeth 15 forming a plurality of slots 16, the nozzle 12 is inserted from an opening formed in the slot 16, and the wire loop 16 is connected to the tooth 1.
5. The guide 20 of the nozzle 12 is formed in an arc shape in a range where the nozzle 12 touches the iron core 9 in the circumferential direction. In FIG.
A predetermined amount of windings 13 are applied to the iron core 9 to form a stator core. An auxiliary winding a is formed on the outer peripheral side, and a main winding 13b is applied on the inner side. If the auxiliary winding 13a and the main winding 13b have different angles of contact with the nozzle 12 depending on the structure of the iron core 9, the auxiliary winding 13a and the main winding 13b cannot be wound at one time. This is performed by attaching to a winding device. In FIG. 6, the nozzle 12 inserted into the slot 16 is formed in an L-shape having a long end in the running direction, and the running hole 23 of the wire loop 14 is formed in the L-shaped portion. Form a curved portion 27 that is greatly curved. And the nozzle 12
Has a minimum width in the circumferential direction inside the slot 16, so that the wire loop 14 is wound up to just before contacting the nozzle 12, so that the ineffective space 288 is reduced and the ratio of the winding 13 to the slot 16 is reduced. Is getting bigger. In FIG. 7, the nozzle 12 has a curved portion 27 formed by forming the tip 22 in an L-shape to greatly curve the hole 23 in which the wire loop 14 runs inside.

In such a configuration, in the method of manufacturing the electric motor, the iron core 9 is attached to the winding device, and the wire loop 14 is wound by the nozzle 12. The winding of the wire loop 14 is performed such that the shaft 11 of the winding device moves up and down and rotates, so that the nozzle 12 rotates around the outer periphery of the tooth portion 15.
The winding 13 is formed at Although the width of the winding 13 is large in the running direction of the nozzle 12, the width is small in the direction in which the winding 13 is wound, and the chance of contact with the opening of the slot 16 is small. The space cross-sectional area required for traveling inside the slot 16 can be small, the amount of the winding 13 can be increased inside the slot 16, and the dead space 28 of the slot 16 generated for traveling of the nozzle 12 can be reduced. can do. And the winding 13 is
The operation is sequentially performed on the iron core 9 as shown in FIG.
Completed as shown in Further, after the main winding 13b and the auxiliary winding 13a are respectively formed, necessary lead wires are attached to complete the stator core. Although not shown, the stator core is completed as a motor by mounting a rotor or the like by molding the outside with a member such as a premix to form a frame.

In such running of the nozzle 12, the moving member 21, which moves on the guide 20 by vertically moving the shaft 11 and rotating in the circumferential direction, constantly corrects the attitude of the tip 22 of the nozzle 12, Of the winding 1 in the slot 16
It operates so as not to contact unnecessary parts such as 3. In the case of the present embodiment, when the learning member 21 travels along the guide 20, the guide 20
When such an action does not occur due to the running of the guide 21, the inner guide parallel to the guide 20 is formed to form a groove in which the moving member 21 runs. Then, the learning member 21 surely travels along the guide 20. of course,
The guide 20 only needs to be in contact with the iron core 9 and the winding 13 by unnecessary contact of the tip 22 of the nozzle 12.
If the length 4 is large, the tip 22 of the nozzle 12 is pulled by the wire 14, so that the tip 22 of the nozzle 12 is always adapted to the direction of the wire 14, and the tip 22 of the nozzle 12 automatically faces in a predetermined direction. The nozzle 12 may be rotated via a gear by an electric motor.
The same operation and effect can be obtained by other methods as long as 2 is configured to face the wire loop 14. Also, the tip 2 of the nozzle 12
The length of 2 may be formed by the convenience of the curved portion 26 formed in the inner hole 23, and there is no problem even if the length is increased.

[0019]

According to the present invention, since the tip of the re-nozzle for directly winding the wire loop around the iron core is bent into an L shape to increase the curved portion on which the wire loop travels, the wire loop is sharply bent at a right angle. It is possible to wind a thin wire loop and increase the number of rotations of the nozzle without being damaged by damage, and to further reduce the dead space formed in the slot for running the nozzle. The motor can be made small and highly efficient in mass production, and the effect is extremely large.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part of a winding device used in a method for manufacturing a motor according to the present invention.

FIG. 2 is a longitudinal sectional view of a main part showing a nozzle guide.

FIG. 3 is a perspective view of a nozzle.

FIG. 4 is a plan view of a main part showing a state where a wire loop is formed on an iron core of the electric motor.

FIG. 5 is a perspective view showing a stator core after a wire loop is wound.

FIG. 6 is a longitudinal sectional view of a main part showing a state in which a nozzle is wound around a wire by the method for manufacturing a motor of the present invention.

FIG. 7 is a longitudinal sectional view of a main part of a nozzle used in the present invention.

FIG. 8 is a longitudinal sectional view of a main part showing a state in which a nozzle is wound around a wire by a conventional method for manufacturing an electric motor.

[Explanation of symbols]

 9 Iron core 12 Nozzle 13 Winding 14 Wire loop 15 Tooth 16 Slot 20 Guide 21 Guide member 22 Tip 23 ... Hole

Claims (1)

(57) [Claims] An electric motor in which a plurality of slots are formed by a plurality of teeth extending from the inner periphery of a ring-shaped iron core in a comb shape, and a wire loop is directly wound between the teeth through the slots. In the winding device , a nozzle extending into a slot for winding a wire loop is provided .
It is arranged on the inner diameter side of the iron core, and is configured to rotate around the outer periphery of the tooth portion. The tip of the nozzle extending to the slot is bent into an L shape, and the curved portion of the hole formed inside is formed. Enlarge and pull out the wire loop, provide a ring-shaped guide, and follow the inner circumference of this guide
So that the chisel runs around the teeth without contact
Winding for the motor, characterized in that the.