JPH0638462A - Insertion method and insertion device for stator coil of electric rotating machine - Google Patents

Abstract

PURPOSE:To reduce coil insertion force at large and prevent the damage of a coil, the breaking of a wire, the deformation of stator core tees, or the breakdown of a jig or a tool by performing the coil insertion with a stripper with a step, at the initial stage, and performing it with a stripper without a step at the final stage. CONSTITUTION:A coil 30 is arranged to correspond to the slot 32 of a stator core 31, and a plate 21 is lifted up by operating the inner rod 26 of a two-stage operating cylinder device, whereby an outer mobile step member 15 and an inner mobile step member 16 are put in the position of maximum projection thereby forming steps. Next, a stripper body 11 is lifted up together with a mobile blade 27 by operating the outer rod 25 of the two-stage operating cylinder device, whereby the coil 30 is inserted into the slot 32 of the stator core 31. At the final stage of this coil insertion, the work force of the inner rod 26 is released, whereby the step at the top of a stripper 10 by the inner mobile step member 16 and the outer step member 15 is removed, and the coil 30 is inserted to the last.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for inserting a stator coil of a rotary electric machine, which is designed to reduce a coil insertion force when inserting a coil into a slot of a stator core.

[0002]

2. Description of the Related Art As a stator coil insertion device, an alignment tool having a projection for engaging a coil wound at a predetermined position of a plurality of blades arranged at a predetermined interval on the same circumference and engaging with a slot of a stator core. Is located at the upper end of the plurality of blades, the stator core is inserted and held to a predetermined position of the plurality of blades using the alignment tool as a guide, and the coil is inserted into the slot of the stator core by the stripper located in the plurality of blades and moving with the movable blade. For example, those disclosed in
-126905. As shown in FIG. 5, the alignment tool of the stator coil insertion device is configured by mounting a core guide 3 and an alignment 4 on a shaft 2 connected to a tool head 1, and a stripper 5
Thus, the fixed coil 6 is inserted into the slot 8 of the stator core 7. As the stripper 5 used for inserting the stator coil into the slot of the stator core, as shown in FIG. 6, a plurality of steps 5a arranged concentrically on the upper surface of the head portion, or as shown in FIG. ,
There is one in which the upper surface of the head portion is a plane 5b.

[0003]

In a stripper having a step, as shown in FIG. 8, when the stator coil is inserted into the slot of the stator core, the peak of the insertion force of each coil is dispersed, and Although the insertion force can be reduced, a coil corresponding to a high step is likely to be stretched at the final stage of insertion, and the coil insertion force rises.Therefore, the coil circumference corresponding to this part must be set long. I have to. Also, with a stripper without steps,
As shown in FIG. 8, although the coil insertion force at the final stage of the coil can be reduced, when the stator coil is inserted into the slot of the stator core, the peaks of the insertion forces of the coils overlap each other, and There is a problem that the coil insertion force becomes high, and the coil may be damaged or broken, the stator core teeth may be deformed, or the jig or tool may be damaged.

The present invention has been made in view of the above points, and can reduce the coil insertion force as a whole without increasing the coil circumferential length more than necessary, and further, the coil may be scratched or broken, and the stator core teeth portion may be damaged. An object of the present invention is to provide a method of inserting a stator coil of a rotating electric machine and an inserting device that can prevent deformation or damage to a jig or tool.

[0005]

A stator coil insertion method for a rotating electric machine according to the present invention is a method of supplying a coil wound at a predetermined position of a plurality of blades arranged at a predetermined interval on the same circumference to a stator core of a stator core. An alignment tool having a protrusion that engages with the slot is positioned at the upper ends of the plurality of blades, the stator core is inserted and held up to a predetermined position of the plurality of blades using the alignment tool as a guide, and a stripper that is positioned in the plurality of blades and moves with the movable blade is used. In a stator coil insertion method for a rotating electric machine in which a coil is inserted into a slot of a stator core, coil insertion is performed by a stripper having a step at an initial stage and a stripper having no step at a final stage. To do.

The stator coil insertion device of the rotating electric machine according to the present invention supplies the coil wound at a predetermined position of a plurality of blades arranged at a predetermined interval on the same circumference and engages with the slot of the stator core. Position the alignment tool at the upper end of the multiple blades, insert and hold the stator core up to the predetermined position of the multiple blades using the alignment tool as a guide, and position the coil in the slots of the stator core by the stripper that is located in the multiple blades and moves with the movable blade. In the stator coil insertion device of a rotating electric machine to be inserted into, the stripper has a stripper body having a flat upper surface and a central opening, and a step forming member attached to the central opening of the stripper main body, The step forming member is located on the same plane as the upper surface of the stripper body when retracted, It characterized in that it sometimes forms a step.

[0007]

In the stator coil insertion method for a rotating electric machine according to the present invention, the initial stage of coil insertion is performed by a stripper having a step so that the peak of the insertion force of each coil is dispersed and the total coil insertion force is reduced. By reducing the coil insertion force and performing the final stage of coil insertion with a stripper having no step, the coil insertion force can be reduced and the coil circumference need not be unnecessarily lengthened.

Further, in the stator coil inserting device of the rotating electric machine of the present invention, the step portion is formed in the stripper by sliding the step forming member mounted in the central opening of the stripper body in the protruding direction, Further, by sliding the step forming member in the retracting direction, a flat surface portion is formed in the stripper, and the stripper efficiently inserts the coil.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 10 denotes a stripper of a stator coil insertion device of a rotary electric machine.
Has a stripper main body 11 and a two-stage operation cylinder device 12 incorporated in the stripper main body 11.
A central opening 13 and a cylindrical projection 14 surrounding the central opening 13 are formed on the upper end head portion 11 a of the stripper body 11. The tubular protrusion 14 forms a first step for inserting the coil. Inside the opening 13, an outer movable step member 15 forming a second step and an inner movable step member 16 forming a third step are nestedly incorporated. Outer movable step member 15 and inner movable step member 1
6 is slidably arranged in the vertical direction with respect to the stripper main body 11. The height dimension of the outer movable step member 15 is such that the step 17 is formed at the maximum protruding position and the upper surface 1 is formed at the retracted position.
5a is set to be flush with the upper surface 14a of the cylindrical protrusion 14. The retracted position of the outer movable step member 15 is determined by a stopper 18 extending inward in the radial direction from the central opening 13 of the upper end head portion 11a. The inner movable step member 16 forms a step 19 at the maximum protruding position, and the upper surface 16a is flush with the upper surface 15a of the outer movable step member 15 and the upper surface 14a of the tubular protrusion 14 at the retracted position. A coil split 20 is provided at the center of the upper surface of the inner movable step member 16.

On the other hand, inside the stripper body 11, a plate 21 is arranged slidably in the vertical direction. The movement of the plate 21 is restricted by a stopper 18 and a lower stopper 22 provided on the stripper body 11. The inner movable step member 16 is fixed to the upper surface of the plate 21. A coil spring 24 is attached to the annular groove 23 that opens on the upper surface of the plate 21, and constantly presses the plate 21 downward. And
The stripper main body 11 includes the two-stage operation cylinder device 1
The outer rod 25 of the two is connected to the plate 21, and the inner rod 26 of the two-step operating cylinder device 12 is connected to the plate 21. A movable blade 27 is fixed to the stripper body 11.

That is, when the outer rod 25 of the two-step operating cylinder device 12 operates in the protruding direction, the stripper body 11 moves upward together with the movable blade 27 and the inner rod 26 of the two-step operating cylinder device 12 operates in the protruding direction. , The plate 21 rises to a position where it abuts on a stopper 18 provided on the stripper main body 11, and at the raised position of the plate 21, the outer movable step member 15 reaches the maximum protruding position to form a step 17, and the inner movable step The member 16 reaches the maximum protruding position and forms the step 19.
Then, at the position where the inner rod 26 of the two-step operating cylinder device 12 is pulled back (FIG. 2), the inner movable step member 16
The outer movable step member 15 is in the retracted position, and the upper surface 16a of the inner movable step member 16, the upper surface 15a of the outer movable step member 15, and the upper surface 14a of the cylindrical projection 14 are located in the same plane.

Next, the operation will be described. First, as shown in FIG. 3, a wound coil 30 is supplied to predetermined positions of a plurality of blades arranged at predetermined intervals on the same circumference of the alignment tool, and the coil 30 is fed to the stator core 31.
The stator core 31 is inserted and held up to a position (reference numeral 9 in FIG. 5) where it abuts against the tips of the wedge kites of the plurality of blades. In this state, the stripper 10 of the alignment tool has the upper surface 16a of the inner movable step member 16, the upper surface 15a of the outer movable step member 15, and the upper surface 14 of the cylindrical protrusion 14 as shown in FIG.
a is located in the same plane.

Next, when the inner rod 26 of the two-stage operating cylinder device 12 is operated in the protruding direction, the plate 2
1 is a stripper main body 1 against the spring force of the coil spring 24.
1 to the position where it abuts on the stopper 18 provided in 1.
At the raised position of the plate 21, the outer movable step member 1
5 reaches the maximum projecting position to form the step 17, and the inner movable step member 16 reaches the maximum projecting position to form the step 19. As a result, a step portion is formed on the upper end head portion 11a of the stripper body 11.

Next, when the stripper 10 is actuated in the direction in which the outer rod 25 of the two-stage actuating cylinder device 12 is projected, the stripper body 11 moves upward together with the movable blade 27, and the coil 30 is inserted into the slot 32 of the stator core 31. To be done. When the coil 30 is inserted, the timing of the coil inserted into the slot is shifted for each step of the upper head portion 11a of the stripper.
As shown by the point a in FIG. 8, the peak of the total insertion force is reduced, and along with this, damage to the coil and damage to the jig are prevented.

Further, when the stripper 10 is actuated in the protruding direction by the outer rod 25 of the two-step actuating cylinder device 12, the final stage of coil insertion shown in FIG. 4 is reached.
When the operating force of the inner rod 26 is released at the final stage of this coil insertion, the plate 21 is pressed downward by the spring force of the coil spring, and the outer movable step member 15 and the inner movable step member 16 of the stripper 10 are moved to the coil 21.
Slides in the direction of retracting without being able to withstand the insertion force of the inner movable step member 16, the upper surface 16a of the inner movable step member 16, the upper surface 15a of the outer movable step member 15, and the upper surface 14a of the cylindrical projection 14 are located in the same plane. become. Therefore, even after that, the stripper 1
Although the ascending operation of 0 as a whole continues for a while, since no step is formed in the upper end head portion 11a of the stripper 10,
The coil 21 is inserted to the end without being stretched. Therefore, the insertion force at the final stage of coil insertion is reduced as shown by the point b in FIG. Also, the stripper 10
Since the step portion is not formed in the upper end head portion 11a, the final insertion force does not increase even if the circumference of the coil corresponding to the step portion is short.

In the above embodiment, the step portion of the upper end head portion 11a of the stripper 10 is formed by the two step forming members, but the number of the step forming members can be changed according to the use condition.

[0017]

As described above, according to the present invention, the coil insertion force can be reduced as a whole without making the coil circumference longer than necessary, and the coil is damaged or broken, or the stator core teeth are deformed. Or, it is possible to prevent damage to jigs and tools.

[Brief description of drawings]

FIG. 1 is a diagram showing a state in which a step is formed in a stripper portion of a device for inserting a stator coil of a rotary electric machine according to the present invention.

FIG. 2 is a diagram showing a state in which a step is not formed in the stripper portion of the stator coil insertion device of the rotating electric machine according to the present invention.

FIG. 3 is a diagram showing a state in which the stator coil insertion device of the rotating electric machine according to the present invention has started to be inserted into a slot of a stator core.

FIG. 4 is a diagram showing a state in which the stator coil of the rotary electric machine according to the present invention is almost completely inserted into a slot of a stator core of the device;

FIG. 5 is a view showing an alignment tool of a stator coil insertion device of a rotating electric machine according to the present invention.

FIG. 6 is a view showing a stripper portion of a conventional stator coil insertion device of a rotating electric machine.

FIG. 7 is a diagram showing a stripper portion of a conventional stator coil insertion device of a rotating electric machine.

FIG. 8 is a diagram showing a relationship between a coil insertion position and an insertion force.

[Explanation of symbols]

 10 Stripper 11 Stripper Main Body 11a Upper End Head 13 Center Opening 14 Cylindrical Projection 15 Outer Movable Step Forming Member 16 Inner Movable Step Forming Member 17 Step 19 Groove 20 Coil Split 21 Blade 30 Coil 31 Stator Core 32 Slot

Claims (2)

[Claims] 1. An alignment tool having a protrusion for engaging with a slot of a stator core is provided at an upper end of a plurality of blades by supplying a coil wound at a predetermined position of a plurality of blades arranged at a predetermined interval on the same circumference. A stator coil insertion method for a rotating electric machine, in which a stator core is inserted and held to a predetermined position of a plurality of blades using an alignment tool as a guide, and a coil is inserted into a slot of the stator core by a stripper that is located in the plurality of blades and moves with a movable blade. In the method for inserting a stator coil, the coil insertion is performed by a stripper having a step at the initial stage and the stripper having no step at the final stage. 2. An alignment tool having a protrusion for engaging a slot of a stator core is provided at an upper end of a plurality of blades by supplying a coil wound at a predetermined position of a plurality of blades arranged at a predetermined interval on the same circumference. A stator coil insertion device for a rotating electric machine in which a stator core is inserted and held to a predetermined position of a plurality of blades using an alignment tool as a guide, and a coil is inserted into a slot of the stator core by a stripper that is located in the plurality of blades and moves with a movable blade. In the above stripper, the stripper has a stripper main body having a flat upper surface and a central opening, and a step forming member attached to the central opening of the stripper main body, and the step forming member of the stripper main body when retracted. A stator that is located in the same plane as the upper surface and forms a step when protruding Yl insertion device.