JP6305620B2 - Rotating electric machine stator and method of manufacturing rotating electric machine stator - Google Patents

Description

The present invention relates to a rotating electrical machine stator used in industrial machinery and the like, and a method of manufacturing the rotating electrical machine stator .

  In a conventional stator of a rotating electric machine, as an insulation method between an iron core and a coil, an insulating film is arranged along the inner wall of the slot inside the slot for accommodating the coil, and the iron core is disposed on both axial end surfaces of the iron core. And a method of insulating between the insulating film and the coil wound from above the insulating end plate and the iron core by covering the insulating end plate made of a bowl-shaped resin so as to enclose the insulating film (for example, Patent Document 1).

  In recent years, due to demands for miniaturization and high speed of industrial machines, rotary electric machines used therefor are also required to be miniaturization and high output. As one of the means, in order to increase the number of coil turns, There is a need for technology to expand

JP 2003-61286 A

  In the insulating structure disclosed in Patent Document 1, the insulation between the inner wall surface of the slot of the iron core and the coil is provided in the circumferential direction between the insulating end plate, which is a resin molded product, and the insulating film in the vicinity of both axial ends of the iron core. It is a double structure. This is excessive as an insulating function. In addition, the insulating end plate projecting into the slot in the circumferential direction reduces the number of coils that can be wound around the magnetic teeth portion because the slot area is reduced, thereby reducing the size and output of the rotating electrical machine. There was a problem of going against the request for expansion of the slot area.

The present invention has been made in order to solve the above-described problems, and can provide a rotating electrical machine that can reliably secure insulation between an iron core and a coil and can increase the number of coil turns by expanding a slot region. An object of the present invention is to provide a stator and a method for manufacturing a stator of a rotating electrical machine .

The stator of the rotating electrical machine according to the present invention is:
An iron core in which a plurality of split iron cores connected in a ring shape having a yoke part, a magnetic pole tooth part projecting inward from the yoke part, and a shoe part projecting in a circumferential direction from an inner peripheral tip of the magnetic pole tooth part;
In a stator of a rotating electric machine having a coil wound around the magnetic pole teeth part,
The stator is a core end insulating member disposed on each end face of the split core in the axial direction;
An inner circumferential surface of the yoke portion, a circumferential side surface of the magnetic pole tooth portion, and an outer circumferential surface of the shoe portion; and an inner circumferential surface of the yoke portion and a circumferential side surface of the magnetic pole tooth portion; An outer peripheral surface of the shoe portion and an insulating film that insulates the coil;
The iron core end insulating member includes an end surface insulating portion that covers an end surface in the axial direction of the magnetic pole tooth portion;
An inner flange that protrudes from the inner circumferential end of the end surface insulating portion to both sides in the circumferential direction and extends upward in the axial direction, and an outer end of the end surface insulating portion covers the axial end surface of the yoke portion. And has an outer casing that protrudes on both sides in the circumferential direction and extends upward in the axial direction,
The length of the insulating film in the axial direction is longer than the axial length of the divided core.
The circumferential width of the end surface insulating portion is equal to or less than the circumferential width of the magnetic pole tooth portion ,
Two first fitting protrusions that protrude downward in the axial direction across the magnetic pole tooth portion from the inner flange, and are fitted to the upper end of the outer peripheral surface of the shoe portion;
Two second fitting protrusions that protrude downward in the axial direction across the magnetic pole teeth portion from the outer casing and are fitted to the upper end of the inner peripheral surface of the yoke portion,
The iron core end insulating member has a gap through which the insulating film can be inserted between the end surface insulating portion and the first fitting protrusion and between the end surface insulating portion and the second fitting protrusion. ,
The iron core end insulating member has a lateral groove extending in a circumferential direction into which the insulating film can be inserted along the second fitting protrusion on the outer peripheral side of the base portion of the second fitting protrusion. is there.
In addition, a method for manufacturing a stator for a rotating electrical machine according to the present invention includes:
An iron core in which a plurality of split iron cores connected in a ring shape having a yoke part, a magnetic pole tooth part projecting inward from the yoke part, and a shoe part projecting in a circumferential direction from an inner peripheral tip of the magnetic pole tooth part;
A method of manufacturing a stator of a rotating electric machine having a coil wound around the magnetic pole teeth part,
The stator is a core end insulating member disposed on each end face of the split core in the axial direction;
An inner circumferential surface of the yoke portion, a circumferential side surface of the magnetic pole tooth portion, and an outer circumferential surface of the shoe portion; and an inner circumferential surface of the yoke portion and a circumferential side surface of the magnetic pole tooth portion; An outer peripheral surface of the shoe portion and an insulating film that insulates the coil;
The iron core end insulating member includes an end surface insulating portion that covers an end surface in the axial direction of the magnetic pole tooth portion;
An inner flange that protrudes from the inner circumferential end of the end surface insulating portion to both sides in the circumferential direction and extends upward in the axial direction, and an outer end of the end surface insulating portion covers the axial end surface of the yoke portion. And has an outer casing that protrudes on both sides in the circumferential direction and extends upward in the axial direction,
The length of the insulating film in the axial direction is longer than the axial length of the divided core.
The circumferential width of the end surface insulating portion is equal to or less than the circumferential width of the magnetic pole tooth portion,
A wire introduction groove is formed in an axial direction on an extension line of a connection portion between the magnetic pole tooth portion and the yoke portion at a base portion of the outer casing,
The iron core end insulating member protrudes axially downward from the inner flange with the magnetic pole tooth portion sandwiched therebetween, and two first fitting protrusions fitted to the upper end of the outer peripheral surface of the shoe portion;
Two second fitting protrusions that protrude downward in the axial direction across the magnetic pole teeth portion from the outer casing and are fitted to the upper end of the inner peripheral surface of the yoke portion,
Inserting the insulating film along the inner peripheral surface of the yoke part, the side surface in the circumferential direction of the magnetic pole tooth part, and the outer peripheral surface of the shoe part; and
A core end insulating member attaching step for fitting the core end insulating member to the split core from both axial sides of the split core;
A coil winding step of winding the coil around the divided core that has been insulated;
In the iron core end insulating member attaching step,
Of the first fitting protrusion and the second fitting protrusion, after inserting the longer fitting protrusion into the split core, the tip of the longer fitting protrusion is used as a fulcrum, The shorter fitting protrusion is fitted to the divided iron core while rotating the core end insulating member.

According to the stator of the rotating electrical machine and the method for manufacturing the stator of the rotating electrical machine according to the present invention, the insulation of the side surface in the circumferential direction at the axial end portion of the magnetic pole tooth portion of the split iron core is limited to the insulating film. As a result, the slot area can be expanded, and at the same time, the insulation between the iron core and the coil can be reliably secured. As a result, the number of turns of the coil can be increased, and the rotating electrical machine using the stator can be reduced in size and output.

It is a perspective view of the stator of the rotary electric machine which concerns on Embodiment 1 of this invention. It is a top view of the division | segmentation iron core which comprises the stator of the rotary electric machine which concerns on Embodiment 1 of this invention. They are the figure which shows the assembly process of the division | segmentation iron core which concerns on Embodiment 1 of this invention, a core end insulation member, and an insulation film, and the perspective view of an insulated division | segmentation iron core. It is a perspective view of the iron core edge part insulation member of the stator of the rotary electric machine which concerns on Embodiment 1 of this invention. It is a perspective view which shows the coil winding process which concerns on Embodiment 1 of this invention. It is sectional drawing of the division | segmentation stator which concerns on Embodiment 1 of this invention. It is a top view of the split iron core which comprises the stator which concerns on Embodiment 2 of this invention. It is a perspective view of the iron core edge part insulation member of the stator of the rotary electric machine which concerns on Embodiment 2 of this invention. It is sectional drawing of the split stator which concerns on Embodiment 2 of this invention. It is a perspective view of the iron core edge part insulation member of the stator of the rotary electric machine which concerns on Embodiment 3 of this invention. It is a perspective view of the iron core edge part insulation member of the stator of the rotary electric machine which concerns on Embodiment 4 of this invention. It is the figure which looked at the iron core edge part insulation member which concerns on Embodiment 4 of this invention from the inner side of the stator, and the circumferential direction. It is a perspective view which shows the process of mounting | wearing with an iron core edge part insulation member to the split iron core which mounted | wore the insulating film which concerns on Embodiment 4 of this invention.

Embodiment 1 FIG.
Hereinafter, a stator for a rotating electrical machine and a method for manufacturing the stator for a rotating electrical machine according to Embodiment 1 of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a stator 100 of a rotating electrical machine.
The stator 100 includes an iron core 10 and a coil 3 housed in a slot of the iron core 10.
FIG. 2 is a plan view of the split iron core 12 constituting the iron core 10.

  In this specification, the terms “axial direction”, “circumferential direction”, “radial direction”, “inner peripheral side”, “outer peripheral side”, “inner peripheral surface”, “outer peripheral surface”, unless otherwise specified. The “axial direction”, “circumferential direction”, “radial direction”, “inner peripheral side”, “outer peripheral side”, “inner peripheral surface”, and “outer peripheral surface” of the stator 100 are respectively referred to. Also, in this specification, “up” and “down” are not particularly specified, and a plane perpendicular to the axial direction is assumed at a reference location, and the center point of the stator is included with that plane as a boundary. The lower side is “down” and the opposite is “up”. Further, when comparing the heights, the longer distance from the center of the stator is defined as “high”.

  The split iron core 12 includes a yoke portion 12a having an arcuate outer periphery, a magnetic pole tooth portion 12b protruding inward from the center of the yoke portion 12a, and a shoe portion 12c protruding in the circumferential direction from the tip of the magnetic pole tooth portion 12b. A locking groove 12d extending in the axial direction is provided at the center of the outer peripheral surface of the yoke portion 12a. The locking groove 12d is used for gripping the divided iron core 12 in a coil winding process described later. The iron core 10 is a combination of a plurality of divided iron cores 12 in an annular shape. In the iron core 10, slots S indicated by hatched portions in FIG. 2 are formed between adjacent magnetic pole tooth portions 12b.

FIG. 3A is a view showing an assembling process of the split iron core 12, the iron core end insulating members 4 a and 4 b, and the insulating film 5.
FIG. 3B is a perspective view of the insulated divided iron core 13 in which the divided iron core 12, the iron core end insulating members 4a and 4b, and the insulating film 5 are assembled.
FIG.3 (c) is a perspective view of the state which opened the insulating film 5 from the state of FIG.3 (b).

  The core end insulating members 4a and 4b are resin molded products having the same shape. In this specification, even if only one of the core end insulating members is mentioned, the two core end insulating members are the same unless otherwise specified. The core end insulating members 4a and 4b are provided with an insulating function that insulates between the end face 12b1 in the axial direction of the magnetic pole tooth portion 12b of the split core 12 and the coil 3, a reel function that contributes to the alignment of the coil 3, and an insulating function. It has an insulating film fixing function for fixing the film 5.

  The insulating film 5 is disposed along the inner peripheral surface 12a2 of the yoke portion 12a, the circumferential side surface 12b2 of the magnetic pole tooth portion 12b, and the outer peripheral surface 12c2 of the shoe portion 12c. The insulating film 5 is a resin film that insulates between the inner peripheral surface 12a2 of the yoke portion 12a, the circumferential side surface 12b2 of the magnetic pole tooth portion 12b, the outer peripheral surface 12c2 of the shoe portion 12c, and the coil 3. . The insulating film 5 can be opened and closed in the circumferential direction as shown in FIG. Further, the length of the insulating film 5 in the axial direction is longer than the length of the split iron core 12 in the axial direction.

Fig.4 (a) is the perspective view which looked at the iron-core edge part insulation member 4a from diagonally upward.
FIG.4 (b) is the perspective view which looked at the iron-core edge part insulation member 4a from diagonally downward.
Next, the part which provides the above-mentioned insulation function, a reel function, and an insulating film fixing function is demonstrated about the iron core edge part insulation member 4a, respectively.

  The end surface insulating portion 4a1 covers the end surface 12b1 in the axial direction of the magnetic pole tooth portion 12b, and exhibits the above-described insulating function to ensure insulation between the magnetic pole tooth portion 12b and the coil 3. The insulating member described in Patent Document 1 covered not only the end surface in the axial direction of the split iron core but also a part of the circumferential side surface of the magnetic pole tooth portion 12b following the end surface. On the other hand, the end surface insulating portion 4a1 according to the present embodiment is formed so as to cover only the end surface 12b1 in the axial direction of the magnetic pole tooth portion 12b. That is, the circumferential width of the end face insulating portion 4a1 and the circumferential width of the magnetic pole tooth portion 12b are the same.

  An end portion on the inner peripheral side of the end surface insulating portion 4a1 is provided with an inner flange 4au that protrudes on both sides in the circumferential direction and extends upward in the axial direction. In addition, the outer peripheral end of the end surface insulating portion 4a1 is provided with an outer casing 4as that protrudes on both sides in the circumferential direction so as to cover the axial end surface of the yoke portion 12a and extends upward in the axial direction. One end of the winding frame around which the coil 3 is wound is constituted by the inner flange 4au, the outer flange 4as, and the end surface insulating portion 4a1, and exhibits the above-described winding frame function.

  The core end insulating member 4a protrudes downward in the axial direction from the inner flange 4au with the magnetic pole tooth portion 12b interposed therebetween, and is fitted to the upper end of the outer peripheral surface 12c2 of the shoe portion 12c. 1 fitting protrusion). Similarly, the core end insulating member 4a protrudes downward in the axial direction from the outer casing 4as with the magnetic pole tooth portion 12b interposed therebetween, and is fitted to the upper end of the inner peripheral surface 12a2 of the yoke portion 12a. (Second fitting protrusion). In addition, as shown in FIG.4 (b), the clearance gaps s2-s5 which can insert the insulating film 5 are inserted between the end surface insulation part 4a1 of the iron core part insulation member 4a and the fitting protrusions 4a2-4a5. Is formed. In addition, a lateral groove y5 that can only insert the insulating film 5 along the fitting protrusions 4a5 and 4a4 is provided in the circumferential direction on the outer peripheral side of the base part of the fitting protrusions 4a5 and 4a4.

  Both end portions in the axial direction of the insulating film 5 are sandwiched and held between the fitting projections 4a2, 4a3 and the shoe portion 12c and between the fitting projections 4a4, 4a5 and the yoke portion 12a. Thereby, the core end insulating member 4a is fixed to the axial end of the split core 12, and at the same time, exhibits the above-described insulating film fixing function for holding the insulating film 5 in the slot S.

  The prior art insulating end plate has a shape in which a fitting portion between the insulating end plate and the split iron core is connected from the inner peripheral side surface of the yoke portion to the outer peripheral side surface of the shoe portion, and the insulating end plate and the split iron core are the magnetic teeth portion. It overlapped at the side edge. On the other hand, the end surface insulating portion 4a1 of the core end insulating member 4a according to the present embodiment does not overlap with the circumferential side surface 12b2 of the magnetic pole tooth portion 12b, and the side surface 4a11 of the core end insulating member 4a is the magnetic pole tooth portion. It becomes flush with the side surface 12b2 of 12b and there is no step. And the axial direction edge part of the insulating film 5 is inserted in the above-mentioned clearance gap s2-s5, horizontal groove | channel y5, etc. FIG. Therefore, the insulating film 5 can completely insulate the circumferential side surface 12b2 of the magnetic pole tooth portion 12b of the split iron core 12.

Then, the manufacturing method of the stator 100 is demonstrated.
First, as shown in FIG. 3A, the insulating film 5 that can be opened in the circumferential direction is divided into an inner circumferential surface 12a2 of the yoke portion 12a, a circumferential side surface 12b2 of the magnetic pole tooth portion 12b, and an outer circumferential surface 12c2 of the shoe portion 12c. And insert along

  As the insulating film 5, a film having a crease P in advance so as to follow the inner surface shape of the slot S (actually half thereof) is used. The crease P includes a portion along the inner peripheral side of the yoke portion 12a and a circumferential end portion, a portion along the root portion of the magnetic pole tooth portion 12b, and a portion along the outer peripheral side portion and the circumferential end portion of the shoe portion 12c. And are provided so as to extend in the axial direction.

  When the insulating film 5 is attached to the split iron core 12, it is assembled with all the folds P folded. Thereby, since the insulating film 5 follows the shape of the division | segmentation iron core 12, the attachment process of subsequent iron core edge part insulation members 4a and 4b becomes easy.

  Next, as shown in FIG. 3 (b), the core end insulating members 4 a and 4 b are fitted to the split core 12 from both axial sides of the split core 12 to obtain an insulated split core 13. At this time, both ends in the axial direction of the insulating film 5 are sandwiched and fixed between the fitting protrusions 4a2 to 4a5 and 4b2 to 4b5 of the core end insulating members 4a and 4b and the split core 12. Further, the fitting protrusions 4a2 to 4a5 and 4b2 to 4b5 just fit between the respective folds.

  Thereby, when a part of the insulating film 5 is re-deployed before the coil 3 is wound, the insulating film 5 is deformed in the slot S, and thereby, the arrangement of the wires is disturbed when the coil is wound. Can be prevented.

FIG. 5 is a perspective view showing a coil winding process for winding the coil 3 around the insulated divided core 13 in the state of FIG.
First, the locking groove 12d provided in the axial direction on the outer peripheral surface of the split iron core 12 is gripped by a winding device (not shown). And the opening-and-closing part 51a, 52a, 51b, 52b of the insulating film 5 is opened along the crease | fold P in the circumferential direction.

  Next, the insulated divided iron core 13 is rotated in the direction of the arrow in FIG. 5, and the coil 3 is wound around the insulated divided iron core 13 while feeding the wire 8 from the nozzle 9. The insulated split iron core 13 side may be fixed and the nozzle 9 may be rotated. When the winding of the coil 3 is finished, the open / close portions 51a, 52a, 51b, 52b of the insulating film 5 are closed along the fold line P in the radial direction to obtain the divided stator 14. Next, a plurality of split stators 14 are combined in an annular shape, and the adjacent split stators 14 are fixed together by welding, resin molding, or shrink fitting to an aluminum frame to obtain the stator 100.

FIG. 6A is a cross-sectional view of the split stator 14.
6B is a cross-sectional view taken along the line AA in FIG. 6A, and includes the magnetic pole tooth portion 12b, the end surface insulating portion 4a1 of the core end insulating member 4a, and the magnetic pole teeth of the insulating film 5. FIG. The part which follows the part 12b is shown.
FIG. 6C is a cross-sectional view of the split stator 14b when it is assumed that the prior art insulating end plate 4X1 is used for the split stator according to the present embodiment.
FIG.6 (d) is sectional drawing in the BB line of FIG.6 (c). Note that FIG. 6D shows a display object similar to that in FIG.

  As can be seen by comparing FIG. 6A and FIG. 6C, in this embodiment, the insulating member on the side surface 12b2 in the circumferential direction of the magnetic pole tooth portion 12b is only the insulating film 5, so that the slot region is enlarged. The number of turns of the coil 3 can be increased as compared with the case where the prior art is applied.

According to the rotating electrical machine stator 100 and the manufacturing method of the rotating electrical machine stator 100 according to the first embodiment of the present invention, the circumferential side surface 12b2 of the end portion in the axial direction of the magnetic pole tooth portion 12b of the split core 12 is provided. Insulation can be performed only with the insulating film 5, so that the slot region can be enlarged and at the same time, the insulation between the iron core and the coil can be reliably ensured. As a result, the number of turns of the coil can be increased, and the rotating electrical machine using the stator 100 can be reduced in size and output.

  The length of the insulating film 5 in the axial direction is longer than the length of the split iron core 12 in the axial direction. Therefore, in the insulated divided core 13, the insulating film 5 along the circumferential side surface 12 b 2 of the magnetic pole tooth portion 12 b is the circumferential side surface 4 a 11 of the end surface insulating portions 4 a 1 and 4 b 1 of the core end insulating members 4 a and 4 b. Arranged so as to overlap. Thereby, the insulation of the division | segmentation iron core 12 and the coil 3 is completely securable.

  In the above description, the example in which the circumferential width of the end face insulating portion 4a1 and the circumferential width of the magnetic pole tooth portion are formed to the same length has been described. However, the end face is adjusted to the margin of the length of the insulating film 5. The circumferential width of the insulating portion 4a1 may be smaller than the circumferential width of the magnetic pole tooth portion 12b.

Embodiment 2. FIG.
Hereinafter, a stator for a rotating electrical machine and a method for manufacturing the stator for a rotating electrical machine according to a second embodiment of the present invention will be described with reference to the drawings, focusing on the differences from the first embodiment.
FIG. 7 is a plan view of split core 212 that constitutes the core according to Embodiment 2 of the present invention.
Fig.8 (a) is the perspective view which looked at the iron-core edge part insulation member 204a from diagonally upward.
FIG. 8B is a perspective view of the iron core end insulating member 204a as viewed obliquely from below.
FIG. 9A is a cross-sectional view of the split stator 214.
FIG. 9B is a cross-sectional view taken along the line CC of FIG. 9A. The magnetic pole teeth 12b, the end surface insulating portion 204a1 of the core end insulating member 204a, and the magnetic pole teeth of the insulating film 5 are shown. The part along the part 212b is shown.
Unlike the first embodiment, the inner peripheral surface 212a2 of the yoke portion 212a of the split iron core 212 has an arc shape whose cross section perpendicular to the axial direction has the same curvature as the outer peripheral surface. Then, the thickness X in the radial direction of the fitting protrusions 204a4 and 204a5 of the iron core end insulating member 204a is set to the fitting protrusions 4a4 and 4a5 of the first embodiment in accordance with the expanded space of the slot 20S (FIG. 4). The thickness of each of the outer peripheral surfaces is larger than the thickness in the radial direction of the reference portion, and the outer peripheral surfaces thereof are formed along the inner peripheral surface of the yoke portion 12a to increase the rigidity.

  Thereby, the force by which the fitting protrusions 204a4 and 204a5 press the insulating film 5 is increased, and the fitting protrusions 204a4 and 204a5 are not deformed even if the insulating film 5 is unfolded excessively when the coil 3 is wound. Moreover, the assemblability of the insulated divided core can be improved by increasing the rigidity of the core end insulating member 204a. Furthermore, handling of the insulated split iron core and the split stator before and after the winding of the coil 3 is facilitated.

  Moreover, when manufacturing the core end insulating member 204a, the fluidity of the resin can be improved, and the moldability of the core end insulating member 204a can be improved. The method for manufacturing the stator is the same as that in the first embodiment.

Embodiment 3 FIG.
Hereinafter, a stator for a rotating electrical machine and a method for manufacturing the stator for a rotating electrical machine according to a third embodiment of the present invention will be described with reference to the drawings, focusing on differences from the second embodiment.
FIG. 10 is a perspective view of the iron core end insulating member 304a as viewed obliquely from above.
The configuration of the stator according to the present embodiment other than the iron core end insulating member 304a is the same as that of the second embodiment.

  As shown in FIG. 10, a wire introduction groove M is formed in the axial direction on one side of the extension line of the connecting portion between the magnetic pole tooth portion 212b and the yoke portion 212a at the base portion of the outer flange 304as of the core end insulating member 304a. Is different.

  The wire introduction groove M is a place where an introduction wire at the beginning of winding of the coil 3 in the coil winding process is disposed, and in the vicinity of the connection portion between the yoke portion 212a and the magnetic teeth portion 212b (the root portion of the magnetic teeth portion 212b). This is to avoid interference between the wound wire and the introduction wire. By providing the wire introduction groove M, the alignment of the coil 3 can be improved and the number of turns of the coil 3 can be increased.

  When the same wire introduction groove M is formed in the core end insulating members 4a and 4b according to the first embodiment, the inner peripheral surface 12a2 of the yoke portion 12a is planar in the circumferential direction. Interfere with. However, the interference can be avoided by combining the shape of the yoke portion 212a of the split core 212 and the core end insulating member 304a according to the third embodiment. Since the wire introduction groove M is for introducing the winding start end of the wire for the coil 3, it is not necessary to form it in the core end insulating member attached to the opposite side of the split core 12.

Embodiment 4 FIG.
Hereinafter, a stator for a rotating electrical machine and a method for manufacturing the stator for a rotating electrical machine according to a fourth embodiment of the present invention will be described with reference to the drawings, focusing on portions different from the first embodiment.
FIG. 11 is a perspective view of the iron core end insulating member 404a as viewed obliquely from above.
Fig.12 (a) is the figure which looked at the iron-core edge part insulation member 404a from the inner side of the stator.
FIG. 12B is a view of the core end insulating member 404a viewed from the circumferential direction of the stator.
FIG. 13 is a perspective view showing a process of attaching the core end insulating member 404a to the split iron core 12 to which the insulating film 5 is attached.

The fitting protrusions 404a2, 404a3, 404a4, and 404a5 of the core end insulating member 404a according to the present embodiment are characterized by their tip shapes.
As shown in FIGS. 11, 12A and 12B, the axial lengths of the fitting projections 404a4 and 404a5 on the yoke portion 12a side are the axes of the fitting projections 404a2 and 404a3 on the shoe portion 12c side. Longer than the direction length.

  In the first embodiment, as shown in FIG. 3, the core end insulating member 4a, the split core 12 into which the insulating film 5 is inserted, and the core end insulating member 4b are aligned straight and divided. The insulated split iron core 13 was assembled by moving it parallel to the axial direction of the iron core. In that case, the insulating film 5 which is a flexible material and the fitting protrusions 4a2 to 4a5 and 4b2 to 4b5 of the core end insulating members 4a and 4b which are resin molded products interfere with each other, which may make assembly difficult. .

  Therefore, the axial lengths of the inner fitting projections 404a2 and 404a3 and the outer fitting projections 404a4 and 404a5 are changed, and as shown in FIG. 13, the longer fitting projections 404a4 and 404a5 in advance. Is inserted into the inner peripheral side of the yoke portion 12a, and the fitting projections 404a2 and 404a3 on the shoe portion 12c side are rotated while rotating the core end insulating member 404a with the tips of the fitting projections 404a4 and 404a5 as fulcrums. By assembling, the assembled split iron core 413 can be easily assembled.

  Furthermore, as shown in FIGS. 12A and 12B, the tapered protrusions T2 to T5 are provided on the side of the fitting protrusions 404a2 to 404a5 that are in contact with the insulating film 5, thereby facilitating the assembly. Can be planned. In the present embodiment, the outer fitting projections 404a4 and 404a5 are lengthened, but the reverse is also possible. Further, the taper processing may be performed only on the inner fitting projections 404a2 and 404a3, or in the first to third embodiments, may be performed only on the inner fitting projections or the outer fitting projections. .

According to the stator for a rotary electric machine and the method for manufacturing a stator for a rotary electric machine according to Embodiment 4 of the present invention, when assembling the core end insulating member 404a, the insulating film 5, and the split core 12, the insulating film The core end insulating member 404a can be mounted without damaging the steel plate 5. Moreover, since general-purpose equipment and jigs can be used for manufacturing the stator, the manufacturing cost of the stator of the rotating electrical machine can be suppressed.

  It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted.

Claims (7)

An iron core in which a plurality of split iron cores connected in a ring shape having a yoke part, a magnetic pole tooth part projecting inward from the yoke part, and a shoe part projecting in a circumferential direction from an inner peripheral tip of the magnetic pole tooth part;
In a stator of a rotating electric machine having a coil wound around the magnetic pole teeth part,
The stator is a core end insulating member disposed on each end face of the split core in the axial direction;
An inner circumferential surface of the yoke portion, a circumferential side surface of the magnetic pole tooth portion, and an outer circumferential surface of the shoe portion; and an inner circumferential surface of the yoke portion and a circumferential side surface of the magnetic pole tooth portion; An outer peripheral surface of the shoe portion and an insulating film that insulates the coil;
The iron core end insulating member includes an end surface insulating portion that covers an end surface in the axial direction of the magnetic pole tooth portion;
An inner flange that protrudes from the inner circumferential end of the end surface insulating portion to both sides in the circumferential direction and extends upward in the axial direction, and an outer end of the end surface insulating portion covers the axial end surface of the yoke portion. And has an outer casing that protrudes on both sides in the circumferential direction and extends upward in the axial direction,
The length of the insulating film in the axial direction is longer than the axial length of the divided core.
The circumferential width of the end surface insulating portion is equal to or less than the circumferential width of the magnetic pole tooth portion ,
Two first fitting protrusions that protrude downward in the axial direction across the magnetic pole tooth portion from the inner flange, and are fitted to the upper end of the outer peripheral surface of the shoe portion;
Two second fitting protrusions that protrude downward in the axial direction across the magnetic pole teeth portion from the outer casing and are fitted to the upper end of the inner peripheral surface of the yoke portion,
The iron core end insulating member has a gap through which the insulating film can be inserted between the end surface insulating portion and the first fitting protrusion and between the end surface insulating portion and the second fitting protrusion. ,
The iron core end insulating member has a transverse groove extending in a circumferential direction into which the insulating film can be inserted along the second fitting projection on the outer peripheral side of the base portion of the second fitting projection. Stator. 2. The stator of a rotating electrical machine according to claim 1, wherein the lateral groove is formed along the inner peripheral surface of the yoke portion over the entire width of the iron core end insulating member. The stator of the rotating electrical machine according to claim 1 or 2, wherein an axial length of the second fitting protrusion is different from an axial length of the first fitting protrusion. Wherein at least one of the first engagement projection or the second fitting projections, the rotation according to any one of claims 1 to 3 having a tapered portion on the side in contact with the insulating film of the tip Electric stator. The inner peripheral surface of the yoke part has an arc shape in a cross section perpendicular to the axial direction,
The outer peripheral surface of the second fitting protrusions stator according to any one of claims 1 to 4, which is formed along the inner peripheral surface of the yoke portion. 6. The wire introduction groove according to claim 1, wherein a wire introduction groove is formed in an axial direction on an extension line of a connection portion between the magnetic pole tooth portion and the yoke portion at a base portion of the outer casing. Stator of rotating electrical machine. An iron core in which a plurality of split iron cores connected in a ring shape having a yoke part, a magnetic pole tooth part projecting inward from the yoke part, and a shoe part projecting in a circumferential direction from an inner peripheral tip of the magnetic pole tooth part;
A method of manufacturing a stator of a rotating electric machine having a coil wound around the magnetic pole teeth part,
The stator is a core end insulating member disposed on each end face of the split core in the axial direction;
An inner circumferential surface of the yoke portion, a circumferential side surface of the magnetic pole tooth portion, and an outer circumferential surface of the shoe portion; and an inner circumferential surface of the yoke portion and a circumferential side surface of the magnetic pole tooth portion; An outer peripheral surface of the shoe portion and an insulating film that insulates the coil;
The iron core end insulating member includes an end surface insulating portion that covers an end surface in the axial direction of the magnetic pole tooth portion;
An inner flange that protrudes from the inner circumferential end of the end surface insulating portion to both sides in the circumferential direction and extends upward in the axial direction, and an outer end of the end surface insulating portion covers the axial end surface of the yoke portion. And has an outer casing that protrudes on both sides in the circumferential direction and extends upward in the axial direction,
The length of the insulating film in the axial direction is longer than the axial length of the divided core.
The circumferential width of the end surface insulating portion is equal to or less than the circumferential width of the magnetic pole tooth portion,
A wire introduction groove is formed in an axial direction on an extension line of a connection portion between the magnetic pole tooth portion and the yoke portion at a base portion of the outer casing,
The iron core end insulating member protrudes axially downward from the inner flange with the magnetic pole tooth portion sandwiched therebetween, and two first fitting protrusions fitted to the upper end of the outer peripheral surface of the shoe portion;
Two second fitting protrusions that protrude downward in the axial direction across the magnetic pole teeth portion from the outer casing and are fitted to the upper end of the inner peripheral surface of the yoke portion,
Inserting the insulating film along the inner peripheral surface of the yoke part, the side surface in the circumferential direction of the magnetic pole tooth part, and the outer peripheral surface of the shoe part; and
A core end insulating member attaching step for fitting the core end insulating member to the split core from both axial sides of the split core;
A coil winding step of winding the coil around the divided core that has been insulated;
In the iron core end insulating member attaching step,
Of the first fitting protrusion and the second fitting protrusion, after inserting the longer fitting protrusion into the split core, the tip of the longer fitting protrusion is used as a fulcrum, A method of manufacturing a stator of a rotating electrical machine in which a shorter fitting protrusion is fitted to the divided iron core while rotating an iron core end insulating member.

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