JP4700229B2 - Method for manufacturing armature of rotating electric machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to the production how the armature of a rotary electric machine, specifically, it relates to an insulating structure and the armature manufacturing how between the core and the winding constituting the armature.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a rotating electric machine, for example, a DC motor, as a method of insulating between a core and a winding constituting the armature (armature), in addition to a method of coating insulating powder on the core, the core and the winding Various methods have been proposed in which a resin molded product (core insulator) made of an insulating material is interposed therebetween.
[0003]
For example, as shown in FIG. 11A, the core insulator 80 is formed so that a gap 82 is provided between the core insulator 80 and the core 81 in order to improve the assembling property with the core 81. . However, since the gap 82 is provided, there is a problem that the space of the winding 83 is reduced by the gap 82. Further, when winding the winding 83, in order to prevent the winding 83 from entering the gap 82, it is necessary to provide a guide 84 for guiding the winding 83 along the path, and the winding machining equipment structure is complicated. And it was expensive.
[0004]
As an insulation method for solving the above problem, there is one disclosed in Japanese Patent Laid-Open No. 2000-316246. In this method, as shown in FIG. 11B, slits 91 extending in the radial direction are provided on the end surface 90a of the core insulator 90 at predetermined intervals in the circumferential direction. Then, after the core insulator 90 is mounted on the core 92, when the winding 93 is wound, the core insulator 90 is deformed by utilizing the fact that the slit 91 is deformed by the tightening force of the winding 93. It is configured to ensure 93 spaces.
[0005]
[Problems to be solved by the invention]
However, in the above configuration, there is a gap between the core insulator 90 and the core 92 unless the tightening force of the winding 93 acts, and the problem that the winding 93 enters the gap has not been solved. Furthermore, when the tightening force of the winding 93 is used, in order to eliminate the gap on the inner diameter side, a larger tightening force is required as compared with the tightening force for eliminating the outer diameter side gap. However, it is not easy to fasten the winding 93 to the core insulator 90 with a strong force. In addition, the winding 93 wound on the inner diameter side exerts a force to move to the outer diameter side, so that the problem due to the formation of a gap between the core insulator 90 and the core 92 has not been solved.
[0006]
The present invention was made in view of the above, the purpose of that can compact while improving the winding space by reducing the gap between the core insulator and the core, the winding equipment structure can simplify is to provide a method of manufacturing an armature of a rotary electric machine capable of reducing the manufacturing cost.
[0009]
[Means for Solving the Problems]
To achieve pre-Symbol purpose, in the invention according to claim 1, a rotating shaft, while being inserted into the rotary shaft, a plurality of laminated core comprised of a core sheet having a tooth portion, A rotating electrical machine comprising: a core insulator made of an insulating resin attached to a surface of the laminated core; and a winding wound around a slot portion of the core insulator in a state where the core insulator is attached to the laminated core In the child manufacturing method, a core teeth cover portion is provided, and the core teeth cover portion is formed with a slit that is elastically deformable so as to extend in the radial direction with a predetermined interval with respect to the circumferential direction. A jig is inserted into the slit of the core insulator to elastically deform the core insulator, and the core teeth cover portion is wider than the teeth portion in the circumferential direction. Attach the core insulator to the laminated core in a temporarily fixed state, then release the jig from the slit to release the temporarily fixed state, and closely contact the core insulator to the laminated core, A winding is wound around the slot portion.
[0010]
According to this invention, the jig is inserted into the slit formed in the core teeth cover portion, the core teeth cover portion is expanded and elastically deformed, and the inner width thereof is in the circumferential direction of the laminated core. Temporarily fixed state that is wider than the width. In this temporarily fixed state, the core insulator is attached to the laminated core. For example, when the outer diameter of the laminated core and the inner diameter of the core insulator are the same width, it is difficult to assemble the core insulator to the laminated core by the conventional assembly method, but the laminated core of the core insulator is larger than the width of the laminated core in the circumferential direction. The width of the inner side in contact with can be increased. Therefore, the core insulator is easily attached to the laminated core.
[0011]
According to a second aspect of the present invention, in the first aspect of the invention, the core insulator is formed such that the inner width of the core insulator that contacts the laminated core is narrower than the width of the laminated core in the circumferential direction. Has been.
[0012]
According to the present invention, since the inner width of the core insulator that contacts the laminated core is formed to be narrower than the width of the laminated core in the circumferential direction, the force that the core teeth cover portion returns to the original state is strong. As a result, the laminated core is sandwiched between the core insulators with a stronger force.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
[0015]
As shown in FIG. 6, a DC motor 1 as a rotating electrical machine includes a motor housing 2, and the motor housing 2 includes a bottomed cylindrical yoke 3 and an end frame 4. A bearing recess 5 is formed in the bottom of the yoke 3, and a bearing 6 is fixed to the bearing recess 5. A pair of magnets 8 and 9 are fixed on the inner surface of the yoke 3.
[0016]
The end frame 4 is fixed to the opening of the yoke 3 and is configured such that an armature 10 as an armature is accommodated in a space formed by the end frame 4 and the yoke 3. A bearing recess 11 is formed in the center of the inner side surface 4 a of the end frame 4, and a through hole 12 is formed in the bearing recess 11. A bearing 13 is fixed to the bearing recess 11, and the rotary shaft 14 of the armature 10 is rotatably supported by the bearing 13 and the bearing 6 fixed to the yoke 3.
[0017]
A laminated core 15 is fixed to the rotating shaft 14 of the armature 10, a winding 16 is wound around the laminated core 15, and a winding end of the winding 16 is a commutator of a commutator 17 that is also fixed to the rotating shaft 14. It is connected to the piece 17a.
[0018]
As shown in FIG. 1, the laminated core 15 is formed by laminating a plurality of core sheets 20. The core sheet 20 is formed with a plurality of teeth pieces (eight in this embodiment) extending radially from the central portion thereof at equal angular intervals. Each tooth piece 21 has a tip 22 formed with a circular arc 22 extending on both sides. Further, a through hole 23 for allowing the rotation shaft 14 to pass through is provided in the central portion of the core sheet 20. In addition, the teeth piece 21 formed in the core sheet 20 constitutes a tooth 15a of the laminated core 15, and the space formed between adjacent teeth 15a constitutes a slot 15b.
[0019]
The core insulator 30 is a molded product made of an insulating thermoplastic resin, and includes a cylindrical portion 31 fixed to the rotary shaft 14 and a core teeth cover portion 32 as shown in FIG. The core teeth cover portion 32 includes a teeth cover piece 33a and a coil bobbin piece 33b. A plurality of teeth cover pieces 33a are radially extended from one side end of the cylindrical portion 31 at equal angular intervals (eight in this embodiment), and each tooth cover piece 33a is formed by teeth of the laminated core 15. 15a is formed in substantially the same shape, and a slit 32a extending in the radial direction is formed at the center thereof.
[0020]
As shown in FIGS. 1 and 2A, the slit 32a is formed in a linear shape and becomes narrower from the inner diameter side toward the outer diameter side. The slit 32 a is formed with substantially circular through holes 32 b and 32 c, the through hole 32 b is provided on the inner diameter side of the slit 32 a, and the through hole 32 c is located slightly inside the outer diameter side of the core insulator 30. Is provided.
[0021]
As shown in FIG. 4A, the inner width of the core teeth cover portion 32 that contacts the laminated core 15 is narrower than the width of the laminated core 15 in the circumferential direction. 4A is a partial schematic cross-sectional view in which the core insulator 30 and the laminated core 15 in FIG. 1 are cut in the vertical direction.
[0022]
Coil bobbin pieces 33b covering the side surfaces of the teeth 15a are formed on the surface of each teeth cover piece 33a opposite to the cylindrical portion 31 so as to extend in parallel with the axial direction of the rotary shaft 14. Each coil bobbin piece 33b, as shown in FIG. 1 and FIG. 2 (a), is a piece continuous from one side outer peripheral part of each tooth cover piece 33a to one side outer peripheral part of the adjacent tooth cover piece 33a, The flat cross-sectional shape is substantially the same as the flat cross-sectional shape of the peripheral surface of the slot 15 b formed in the laminated core 15.
[0023]
In a state where the core insulator 30 is mounted on the laminated core 15, the space formed between the adjacent tooth cover pieces 33 a and the coil bobbin pieces 33 b has the same space shape as the slot 15 b of the laminated core 15. That is, each tooth cover piece 33 a and coil bobbin piece 33 b are configured to abut on the outer surface of each tooth 15 a of the laminated core 15.
[0024]
Next, a method for manufacturing the armature 10 having the above configuration will be described.
First, the jig 40 used when the armature 10 is manufactured will be described.
The jig 40 is used when expanding the interval between the coil bobbin pieces 33b, and includes a substantially disc-shaped support plate 40a as shown in FIG. The support plate 40a is provided with the same number of engaging portions 40b as the through holes 32c (eight in this embodiment) so as to protrude from the support plate 40a at positions that can face the through holes 32c. . As shown in FIGS. 3 and 4A and 4B, the engaging portion 40b is formed in a substantially cylindrical shape, and its tip is formed in a substantially conical shape. FIG. 3 shows two engaging portions 40b. FIG. 4B is a partial schematic cross-sectional view in which the core insulator 30 is cut in the radial direction at a position corresponding to the slit 32a.
[0025]
When the armature 10 is manufactured, first, the engaging portions 40b of the jig 40 are arranged at positions corresponding to the through holes 32c. At this time, the inner width of the core teeth cover portion 32 that contacts the laminated core 15 is narrower than the circumferential width of the laminated core 15 as shown in FIG.
[0026]
Next, as shown in FIGS. 3 and 5A, each engaging portion 40b is inserted into each through hole 32c, the slit 32a is expanded, and the core insulator 30 is formed as shown in FIG. It will be in the temporary fix | stop state shown by a broken line and FIG. In this temporarily fixed state, as the slit 32 a is expanded, the interval between the coil bobbin pieces 33 b becomes wider than the width of the laminated core 15 in the circumferential direction. Then, the core insulator 30 is attached to the laminated core 15 fixed to the rotating shaft 14 in a temporarily fixed state. Note that FIG. 2B is a partial schematic diagram showing a state when viewed from below in FIG.
[0027]
Next, since each engagement portion 40b is pulled out from each through hole 32c and the coil bobbin piece 33b that has been elastically deformed returns to its original state, a force acts in the direction of narrowing the width with respect to the circumferential direction. As shown in FIGS. 5B and 2B, each tooth 15a is sandwiched between each coil bobbin piece 33b. That is, the laminated core 15 is sandwiched between the core insulators 30. Therefore, the inner peripheral surface of the core insulator 30 and the outer peripheral surface of the laminated core 15 are in close contact with each other, and the width of the laminated core 15 in the circumferential direction is the same as the width of the inner side of the core insulator 30 in contact with the laminated core 15. It becomes.
[0028]
Then, after the core insulator 30 is brought into close contact with the laminated core 15, the commutator 17 is inserted into the rotating shaft 14, and the winding 16 is wound between the predetermined teeth 15a. Next, an end portion (not shown) of the winding 16 is connected to a corresponding position of the commutator piece 17a, and the armature 10 is completed. Note that the winding 16 does not come into contact with the inner peripheral surface of the slot 15b of the laminated core 15 by the teeth cover piece 33a and the coil bobbin piece 33b.
[0029]
Next, the base end of the rotating shaft 14 of the armature 10 is accommodated in the yoke 3 to which the magnets 8 and 9 are fixed in a state of being rotatably supported by the bearing 6. The front end of the rotating shaft 14 is rotatably supported by the bearing 13 and the end frame 4 is fixed to the opening of the yoke 3 to complete the DC motor 1.
[0030]
This embodiment has the following effects.
(1) The slit 32a is formed in the teeth cover piece 33a of the core insulator 30, and the coil bobbin piece 33b is formed so as to be wider than the width of the laminated core 15 in the circumferential direction. The core insulator 30 can be elastically deformed by expanding. Therefore, the core insulator 30 can be easily attached to the laminated core 15. Further, when the core insulator 30 is elastically deformed, the laminated core 15 is sandwiched by utilizing the force with which the coil bobbin piece 33b returns to the original state, and the inner peripheral surface of the core insulator 30 and the outer periphery of the laminated core 15 The surface can be in close contact. Accordingly, there is no gap between the core insulator 30 and the laminated core 15.
[0031]
(2) Since the width of the core insulator 30 in the circumferential direction is narrower than that of the laminated core 15, the core insulator 30 and the laminated core 15 can be reliably adhered using the elastic force of the coil bobbin piece 33 b. As a result, unlike the prior art, it is not necessary to rely on the tightening force of the winding 16 to eliminate the gap between the core insulator 30 and the laminated core 15.
[0032]
(3) By sandwiching the laminated core 15 by using the elastic force of the coil bobbin piece 33b, the gap between the core insulator 30 and the laminated core 15 can be eliminated, and the space of the winding 16 is improved as the gap is eliminated. The armature 10 can be downsized. Further, since the clearance is eliminated, it is not necessary to provide a guide for preventing the winding 16 from entering the clearance between the core insulator 30 and the laminated core 15 when the winding 16 is wound. The equipment structure is simplified and the manufacturing cost can be reduced.
[0033]
(4) The core insulator 30 is one article, and can be attached to the laminated core 15 simply by inserting the core insulator 30 into the slot 15 b of the laminated core 15. Therefore, the number of parts becomes one and the cost can be reduced, and the number of assembling steps can be reduced accordingly.
[0034]
(Second Embodiment)
Next, a second embodiment will be described with reference to FIG. In this embodiment, the configuration of the jig for expanding the slit and the configuration of the slit are greatly different from those of the above embodiment. The same parts as those in the above embodiment are given the same reference numerals, and detailed description thereof is omitted.
[0035]
As shown in FIG. 7A, the support plate 40a of the jig 40 used in this embodiment has a through hole 41 extending in the radial direction at a position corresponding to the slit 32a, and the engaging portion 40b. However, it is configured to be able to reciprocate along the through hole 41 by a driving means (not shown). The engaging portion 40b has a triangular cross-sectional shape, and is configured to enter the core insulator 30 from the outer diameter side toward the inner diameter direction.
[0036]
The slit 32a is not formed with the through-hole 32c as in the first embodiment, and a substantially triangular notch is formed at the outer diameter side end of the slit 32a as shown in FIG. 7B. 32d is formed. FIG. 7B is a partial schematic plan view showing the relationship between the slit 32a and the engaging portion 40b.
[0037]
Next, the operation of the above configuration will be described.
When the core insulator 30 is attached to the laminated core 15, first, the lower end of the engaging portion 40b of the jig 40 is disposed in the notch 32d of the slit 32a. And the engaging part 40b is moved so that it may approach toward the internal diameter side from the notch 32d by the drive means which is not shown in figure. At this time, since the cross-sectional shape of the engaging portion 40b is formed in a triangular shape, the slit 32a is gradually expanded from the notch 32d toward the inner diameter side. And the coil bobbin piece 33b will be in the temporarily fixed state expanded rather than the width | variety with respect to the circumferential direction of the lamination | stacking core 15, and is mounted | worn with the lamination | stacking core 15 in that state.
[0038]
Next, after the inner surface of the core insulator 30 that makes contact with the laminated core 15 and the upper surface of the laminated core 15 that makes contact with the core insulator 30 are completely in contact, the engaging portion 40b is moved from the inner diameter side to the outer diameter side. The core insulator 30 is released from the temporarily fixed state. Then, the inner peripheral surface of the core insulator 30 and the outer peripheral surface of the laminated core 15 are in close contact with each other.
[0039]
This embodiment has the following effects in addition to the effects described in the above embodiments (1) to (4).
(5) By the configuration in which the engaging portion 40b is moved from the outer diameter side toward the inner diameter side, the inner side surface that makes contact with the laminated core 15 of the core insulator 30 and the upper surface of the laminated core 15 make contact. In the state where the engaging portion 40b is engaged with the slit 32a, the temporarily fixed state of the coil bobbin piece 33b can be maintained. That is, the coil bobbin piece 33b can be expanded even in a state where the engagement portion 40b is inserted by the thickness of the teeth cover piece 33a. Therefore, after the core insulator 30 is completely inserted into the laminated core 15, the temporarily fixed state of the engaging portion 40 b can be released, and the core insulator 30 can be easily adhered to the laminated core 15.
[0040]
In addition, embodiment is not restricted above, For example, you may change as follows.
-As shown to Fig.8 (a), (b), you may use the jig | tool 40 in which the engaging part 40b was formed so that it might extend in radial direction. At that time, as shown in FIG. 8A, the side surface of the slit 32a may be formed to be a tapered surface 34 in which the upper portion of the side surface widens. Further, the surface may be chamfered so as to be a curved surface instead of the tapered surface 34. In this case, since the side surface of the slit 32a is formed on the tapered surface 34, even the engaging portion 40b formed to extend in the radial direction can be easily inserted into the slit 32a.
[0041]
-As shown to Fig.9 (a), the engaging part 40b may be divided into two, and it may be comprised so that it can reciprocate by the drive means which is not shown in the direction which expands and closes the slit 32a. In this case, after inserting the engaging portion 40b into the through hole 32c, the slit 32a can be easily expanded by widening the engaging portion 40b, and easily through the through hole 32c by closing the engaging portion 40b. The engaging portion 40b can be pulled out from. Moreover, in this structure, as shown to Fig.9 (a), (b), the magnitude | size of the engaging part 40b can be small.
[0042]
-In 2nd Embodiment, you may change into the structure arrange | positioned not only to the structure by which the jig | tool 40 is arrange | positioned above the core insulator 30, but the core insulator 30 outer periphery. In this case, a substantially annular support ring is formed on the outer periphery of the core insulator 30, and an engagement portion 40b capable of reciprocating in the radial direction is provided on the support ring. When the slit 32a is expanded, the engaging portion 40b provided on the support wheel is inserted from the outer peripheral side toward the inner diameter side by a driving unit (not shown), and the core insulator 30 is expanded. Therefore, the same effect as in the second embodiment can be obtained.
[0043]
In the above embodiment, the slit 32a is formed so as to become narrower from the inner diameter side toward the outer diameter side, but may be formed to extend in parallel.
In the above embodiment, the core insulator 30 is configured to be mounted only from one side surface of the laminated core 15. However, for example, as shown in FIG. It is possible to divide the structure so that each end face is provided with a slit 32 a and is mounted from both end faces of the laminated core 15. In addition, the structure which divides | segments the core insulator 30 into two so that it may become asymmetrical may be sufficient.
[0044]
In the above embodiment, the core insulator 30 is attached to the laminated core 15 fixed to the rotating shaft 14. However, the core insulator 30 is attached to the laminated core 15 and the winding 16 is attached. After being wound, the structure may be changed to be fixed to the rotary shaft 14.
[0045]
In the above embodiment, the DC motor 1 is embodied as a rotating electrical machine. However, if the rotating machine includes the armature 10 in which the winding 16 is wound around the laminated core 15 fixed to the rotating shaft 14, You may apply to another motor or generator.
[0046]
Next, the technical idea that can be grasped from the above embodiment will be described below.
(1) before SL core insulator is divided into two, and is configured to be worn from both end faces of the laminated core.
[0047]
(2) A motor comprising the armature manufactured by the manufacturing method according to claim 1 or 2 .
[0048]
【The invention's effect】
As described above in detail, according to the invention described in the claims, can be downsized while improving the winding space by reducing the gap between the core insulator and the core, the structure of the winding equipment simple Manufacturing cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a schematic exploded perspective view showing a core insulator and a core constituting an armature.
2A is a partial schematic bottom view showing a core insulator, and FIG. 2B is a partial schematic bottom view showing a relationship between the core insulator and the core.
FIG. 3 is a partial schematic perspective view showing a relationship among a jig, a core insulator, and a core.
4A is a partial schematic cross-sectional view showing a relationship before insertion of a core insulator and a core, and FIG. 4B is a partial schematic cross-sectional view of the same.
FIG. 5A is a schematic cross-sectional view showing the relationship during insertion of the core insulator and the core, and FIG. 5B is a schematic cross-sectional view showing the relationship after the insertion.
FIG. 6 is a schematic cross-sectional view of a motor.
FIG. 7A is a partial schematic perspective view showing a second embodiment, and FIG. 7B is a partial schematic plan view of the same.
8A is a partial schematic front view showing another example, and FIG. 8B is a partial schematic cross-sectional view of the same.
9A is a partial schematic front view showing another example, and FIG. 9B is a partial schematic cross-sectional view of the same.
FIG. 10 is a schematic side view showing another example of the core insulator.
11A is a partial schematic cross-sectional view showing a conventional technique, and FIG. 11B is a partial schematic plan view showing another conventional technique.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... DC motor as rotary electric machine, 10 ... Armature as armature, 14 ... Rotating shaft, 15 ... Laminated core, 15a ... Teeth as tooth part, 15b ... Slot as slot part, 16 ... Winding, 20 ... Core sheet, 30 ... core insulator, 32 ... core teeth cover part, 32a ... slit, 33a ... teeth cover piece constituting the core teeth cover part, 33b ... coil bobbin piece constituting the core teeth cover part, 40 ... jig.

Claims (2)

A rotating shaft; a laminated core that is inserted into the rotating shaft and includes a plurality of core sheets each having a tooth portion; and a core insulator made of an insulating resin that is attached to the surface of the laminated core. In the method of manufacturing an armature for a rotating electrical machine in which a winding is wound around a slot portion of the core insulator in a state where the core insulator is attached to the laminated core.
A core teeth cover portion is provided, and the core teeth cover portion is provided with a slit that is elastically deformable and extends in a radial direction with a predetermined interval with respect to a circumferential direction. A jig is inserted to elastically deform the core insulator, and the core insulator is attached to the laminated core in a temporarily fixed state in which the core teeth cover portion is expanded in the circumferential direction from the teeth portion. An armature for a rotating electrical machine, wherein the core insulator is released from the slit to release the temporarily fixed state, the core insulator is brought into close contact with the laminated core, and then a winding is wound around the slot portion. Production method. The core insulator, than the width in the circumferential direction of the laminated core, electric machine rotating electrical machine according to claim 1, wherein the laminated core and the width of the inner contact with the core insulator, characterized in that it is narrower Child manufacturing method.

Images