JPH02311149A - Method of mounting armature coil - Google Patents

Abstract

PURPOSE:To prevent an insulating core from deforming by stopping a pressing plate near the end face of an armature core by a guide member provided at the end face of the core when an armature coil is inserted into the slot of the core. CONSTITUTION:A guide member 10 having equal outer diameter C to the outer diameter B of an armature core 2 is pressed to the end face 9b of an insulating core 9 provided at the end face 2b of the core 2. An armature coil 4 is inserted into the slot 5 of the core 2, and a pressing plate 7 is pressed from above to be filled. In this case, the outer diameter B of the core 2 is set to the same size as that C of the member 10. Thus, a stress concentration at the corner 2a of the core 2 by the pressing force of the plate 7 is avoided. Accordingly, the noncontact state of the coil 4 with the core 2 at the adhered part of an insulator 6 with the core 9 is obtained. That is, since the guide member stops the pressing force of the plate at the end of the core, the deformation of an insulating core can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of loading an armature coil into an armature of a rotating electric machine.

(Prior Art) The armature of a rotating electric machine has a cylindrical armature core and a commutator attached around a shaft, as shown in Japanese Patent Publication No. 58-33786, for example.

As shown in FIGS. 5 and 6, the armature core 2 is provided with a plurality of slots 5 in the radial direction (recesses and grooves extending in the axial direction). is covered with an insulating material 6, and an armature coil 4 is pushed into the slot 5 in an overlapping manner.

When filling the slot 5 with the armature coil 4, one armature coil 4 is first placed in the bottom of the slot 5 as shown by the arrow 13, and this armature coil is filled by pushing the pressing plate 7 in the direction of the arrow 14. Press and shape 4. The axial length of this pressing plate 7 is equal to or greater than the axial length of the armature core 2.

(Problem to be Solved by the Invention) However, in the conventional armature coil mounting method described above, when the armature coil 4 inserted into the slot 5 of the armature core 2 is extruded and shaped by the pressing plate 7. , 6th
As shown in the figure, the portion 9a of the coil receiver of the insulating core 9 installed on the armature core end face 2b is deformed by the pressing force of the armature coil 4, and the armature coil 4 is bent in the pressing direction. There was a problem in that the insulating material 6 installed between the child core 2 and the armature coil 4 broke at the armature core end face corner 2a.

The present invention has been made to solve these problems, and when the armature coil is inserted into the slot of the armature core and pressed for shaping, it is possible to prevent the breakage of the armature coil at the corner of the end face of the armature core. It is an object of the present invention to provide a method for loading an armature coil that reliably prevents damage.

(Means for solving the problem) A method for loading armature coils to solve the above problem is as follows:
In the armature coil loading method, in which the armature coil is measured and loaded into the slot of the armature core, each time an armature coil is inserted, Pushing the armature coil into the slot with a pressing plate having the armature, at that time, attaching a guide member to the end face of the armature core to support the armature coil protruding from the bottom of the slot, and compressing and shaping the armature coil with the pressing plate. It is characterized by

(Function) According to the method of the present invention, when an armature coil is pressed and shaped in a slot of an armature core by a pressing plate, a guide member is provided on the axial extension of the bottom of the slot, and this guide member When the child coil is pressed, the coil receiver becomes a part, thereby avoiding stress concentration on the slot corner of the armature core end face, preventing deformation of the armature core and insulating core,
In addition, bending of the armature coil is suppressed.

(Example) Embodiments of the present invention will be described below based on the drawings.

The armature of a rotating electric machine according to an embodiment of the present invention has a structure as shown in FIGS. 1 and 2. In Figure 1, the axis l
A substantially cylindrical armature core 2 and a commutator 3 are attached around the cylindrical armature core 2. Both end surfaces of the cylindrical armature core 2 are each coated with an insulating core 9 made of an insulating material.

The armature core 2 is loaded with an armature coil 4 covered with an insulating film.

The armature coil 4 is loaded into the armature core 2 as shown in FIG.
A plurality of groove-shaped slots 5 are provided which are recessed in the radial direction and extend in the axial direction, and the inner wall surfaces of the slots 5 are covered with an insulating material 6 in the form of a thin film. The width of this slot 5 is approximately the same as the diameter of the armature coil 4. An armature coil 4 having a circular cross section is successively pushed into this slot 5. Here, since the width of the slot 5 is almost the same as the width of the armature coil 4, the arrow 12 shown in FIG.
As shown in the figure, each armature coil 4 after loading has a substantially V-shaped cross section, and a plurality of IIM child coils 4 are lined up in a row in the depth direction of the slot 5.

Since the cross-sectional area of the armature coil determines the electric capacity of the rotating electric machine, the filling rate of the armature coil 4 filled into the slot 5 is preferably high. Therefore, if the slot 5 is to be filled with armature coils densely, the filling ratio will be increased by increasing the depth H of the slot 5 and densely filling the slot 5 with the armature coils 4. However, since the armature core 2 is cylindrical, as the depth H increases, the distance W between the slots 5 at the bottoms 5a of the slots 5 decreases. When this distance jilW becomes smaller, the magnetic flux path cross-sectional area of the armature core 2 decreases, and the torque of the electric motor decreases.Therefore, in this embodiment, the depth H of the slot 5 is made as shallow as possible, and the slot 5 While increasing the mutual distance W, the cross-sectional area of the magnetic flux path is increased, and the electric capacity of the rotating electrical machine is increased.

Next, a method of pressing and shaping the armature coil will be explained.

As shown in FIG. 3, the outer diameter B of the armature core 2 is
A guide member 10 having an outer diameter C approximately equal to that is pressed against the guide member 10.

Then, the armature coil 4 is inserted into the slot 5 of the armature core 2, and the pressing plate 7 is pushed in from above in the direction of the third arrow 15 shown in the figure.

In this case, the axial length Lt of the pressing plate 7 is
is thicker than the sum of the axial length L2 of the insulating core 9 and the axial length L9 of the insulating core 9. In other words, the end surface 7b of the pressing plate 7 protrudes beyond the axial end surface 9b of the insulating core 9. This increases the filling rate of the armature coil 4 into the slot 5. When pressing the armature coil 4 with the tip 7a of the pressing plate 7, the insulating coating of the insulating material 6 and the insulating core 9 Adjust the pressing force so as not to destroy it.

When the press plate 7 is pushed in, the tip portion 7a bites into the armature coil 4, and the armature coil 4 is formed into a substantially V-shape. The next armature coil 4 is placed on top of this armature coil 4 and shaped in the same manner. By repeating this operation, when the slots 5 are filled with the armature coils 4, each armature coil 4 has a V-shaped cross section, and a plurality of armature coils 4 are stacked in a row in the slot depth direction. Its filling rate is extremely high.

In the embodiment described above, the outer diameter B of the armature core and the guide member 1
It is desirable to set the outer diameter C of 0 to approximately the same size. As a result, the armature core 2 is
This prevents stress from concentrating on the corner 2a. Therefore, a non-contact state between the armature coil 4 and the armature core 2 at the joint between the insulating material 6 and the insulating core 9 is ensured. Of course, the values of B and C can be changed as appropriate when loading the armature coil. Moreover, as mentioned above, by satisfying the following conditional expression % expression %, 1itl! near the end surface 2b of the armature core 2! The filling factor of the child coil 4 is increased, and the electric capacity can be increased.

FIG. 4 shows a step in a method of loading an armature coil according to a second embodiment of the invention.

In the loading method of this second embodiment, the coil receiver of the guide member 10 has a slope-shaped relief portion 10b formed at the corner of the end face of the portion 10a. This prevents the insulating material 6 or the insulating core 9 from being damaged by the end face corner of the guiding member 10 when the guide member 10 is brought into contact with the end face 9b of the insulating core 9 provided on the end face 2b of the armature core 2. This is to do so. In this case, the overlapping dimension A of the pressing plate 7 and the coil receiver portion 10a is 0.
Set above. This is because the pressing force from the pressing plate 7 is applied to the coil receiver portion 10a of the guide member 10 via the armature coil 4.
By stopping the receiver, the insulating material 6 or the insulating core 9
This is to prevent deformation of the armature core 9 and the armature coil 4, and to reliably prevent the armature core 9 and the armature coil 4 from being grounded.

(Effects of the Invention) As explained above, according to the armature coil loading method of the present invention, when filling the armature coil into the slot of the armature core, the guide member presses the armature coil near the end face of the armature core. Since the pressing force of the plate is stopped, deformation of the insulating core and bending of the armature coil are reliably prevented.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a xi coil according to an embodiment of the present invention;
2 is a partial sectional view taken along the line n-If shown in FIG. 1, FIG. 3 is a sectional view taken along the line ■-■ shown in FIG. 2, and FIG. The corresponding cross-sectional views, FIGS. 5 and 6, are cross-sectional views for explaining a conventional armature coil loading method. 2... Armature core, 4... Armature coil, 5... Slot, 6... Insulating material, 7... Pressing plate, 10... Guide member.

Claims (1)

[Claims] (1) In the armature coil loading method in which the armature coils are stacked and loaded into the slots of the armature core, each time an armature coil is inserted, the length is at least equal to or longer than the axial length of the armature core. Pushing the armature coil into the slot with a pressing plate having the armature, at that time, attaching a guide member to the end face of the armature core to support the armature coil protruding from the bottom of the slot, and pressing and shaping the armature coil with the pressing plate. A method of loading an armature coil characterized by: