JP3190511B2 - Rotary motor and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary electric motor such as an AC servomotor and a method for manufacturing the same.

[0002]

2. Description of the Related Art FIG. 17 is an exploded perspective view showing a conventional rotary electric motor disclosed in JP-A-63-297934. In the figure,
The stator core 1 is divided into radial magnetic pole teeth 2 integrated on the inner diameter side and a ring-shaped outer yoke 3 fixed to the outer diameter side of the magnetic pole teeth 2. In this electric motor, a coil bobbin 5 around which a coil 4 is wound is independently mounted on each of the magnetic pole teeth 2, and an outer end of the magnetic pole teeth 2 is fitted and fixed to an inner diameter of the outer yoke 3. The pin 8 of the coil bobbin 5 to which the terminal of the coil 4 is twisted is soldered to the printed circuit board 7 to form the stator 8.

Conventional example 2. FIG. 18 is an exploded perspective view showing a conventional rotary electric motor disclosed in Japanese Utility Model Laid-Open No. 57-180448. In the figure,
The stator core 1 is divided into radial magnetic pole teeth 2 integrated on the inner diameter side and a ring-shaped outer yoke 3 fixed to the outer diameter side of the magnetic pole teeth 2. In this electric motor, the coil 4 is wound around the coil bobbin 5 whose inner diameter side is connected by the connecting plate portion 5a, the coil bobbin 5 is mounted on the magnetic pole teeth 2, and then the magnetic pole teeth 2 are connected to the outer yoke 3
The stator 8 is formed by fitting into.

Conventional example 3. FIG. 23 is a side sectional view of a conventional rotary electric motor disclosed in Japanese Patent Application Laid-Open No. 5-168181. In this figure, 1 is a stator core, 4 is a coil, 10 is a rotor, and 34 is a rotor magnet. In this electric motor, the rotor magnet 34 is provided with a skew angle to eliminate uneven rotation due to cogging torque.

Conventional example 4. FIG. 24 is a cross-sectional view of a conventional rotary electric motor disclosed in Japanese Patent Application Laid-Open No. 1-270757. In this figure, the stator core 1 is divided into a ring-shaped outer yoke 3 and a plurality of independent magnetic pole teeth 2, and the rotor core 2 of the magnetic pole teeth 2 is inclined with respect to the axial direction as shown in FIG. 25. The skew angle (skew S) is given.

[0006]

As described above, in the rotary electric motor of the prior art 1, since the coil bobbins 5 are formed independently of each other, the starting and ending of the winding of the coil 4 are provided for each coil bobbin 5. It was necessary to process the terminals one by one and connect them to the printed circuit board 7 via the pin terminals 6. In this conventional example, the coils 4 are cut once and connected again via the printed circuit board 7 although the coils 4 in the same phase can be continuously wound by connecting them at a portion called a crossover. Therefore, there is a problem that an extra process increases.

In the rotary motor of the prior art 2, since the coil bobbin 5 is connected, continuous winding can be performed without cutting the crossover. However, since the coil bobbin 5 is connected on the inner diameter side, the coil 4 is connected. In this case, it is not possible to increase the working space when winding the coils 4, and the coils 4 cannot be aligned and wound. In addition, there is a problem that the slot cannot be effectively used as a space occupied by the coil.

This point will be described in detail with reference to the drawings. As shown in FIG. 19 , the winding winding means winding the winding 12 sequentially from one end to the other end in the width direction of the coil bobbin 5 and from the other end to one end, and orderly winding the winding 12 from the inner peripheral side to the outer peripheral side.
This is a winding method for stacking. In FIG. 19 , the winding 12
The numbers in the cross section indicate the winding order. The aligned winding can increase the winding density in a limited space and can realize a stable winding shape. Therefore, the output of the rotary motor is increased, the characteristics are stabilized, and the size is reduced.

In the aligned winding, as shown in FIG. 20 , the winding nozzle 13 is made to rotate while relatively moving in the width direction of the coil bobbin 5, thereby winding the winding 12 while sending out the winding 12 from the winding nozzle 13. However, when the coil bobbins 5 are connected to each other as shown in FIG. 21 , it is difficult to secure a sufficient space for the winding nozzles 13 due to the influence of the adjacent coil bobbins 5, and it may not be possible to arrange winding. Then, the winding 12 is disturbed as shown in FIG. 22 , the gap between the windings 12 increases, the winding density decreases,
There is a limit to the improvement of characteristics.

In the rotary motor of the second prior art, an inner diameter side of a coil bobbin 5 radially arranged at the time of assembly is connected to a connecting plate portion 5a.
, The space between the adjacent coil bobbins 5 and 5 (this corresponds to the slot portion during assembly) is narrow, it is difficult to secure a sufficient space for the winding nozzle 13, and it is not possible to arrange and wind. The space in the slot cannot be effectively occupied by the coil.

The rotary motor of the prior art 3 is configured to provide a skew angle to the rotor magnet 34. However, the method of giving the skew angle by the manner of magnetizing the rotor magnet 34 requires that the accuracy of the skew angle be made too high. Not be able to
There has been a problem that the characteristics cannot be stabilized and that the cogging torque cannot be sufficiently reduced.

The rotary motor of the conventional example 4 has the magnetic pole teeth 2
Although the cogging torque is reduced by giving the skew angle (skew S) to the rotor facing portion 2a, changing the shape of each laminated core in the pressing of the stator core 1 requires a lot of setup time. And there is a problem that it is not preferable in terms of processing efficiency.

The inventions of claims 1 to 3 have been made in order to solve the above-mentioned problems, and it is possible to continuously wind a coil of the same phase without breaking a crossover, and furthermore, to arrange and wind the coils. It is another object of the present invention to provide a rotary electric motor capable of effectively utilizing a slot as a space occupied by a coil.

A fourth object of the present invention is to provide a method of manufacturing a rotary electric motor capable of easily arranging and winding the coils and effectively occupying the space of the slot portion of the stator with the windings. .

[0015]

According to a first aspect of the present invention, there is provided a rotary electric motor in which a stator core is divided into a ring-shaped outer yoke and a plurality of the magnetic pole teeth fixed to an inner diameter side of the outer yoke. The coil bobbin to be fitted is non-circularly connected by a thin portion that is bendable on the outer diameter side of the magnetic pole teeth , and the thin portion is non-circular.
One end in the width direction of the coil bobbin connected in a row
It is formed to have a length from the end to the other end .

According to a second aspect of the present invention, there is provided a rotary motor in which a neutral terminal portion for connecting a neutral terminal of a coil and a connector terminal are connected to the outer diameter side of the coil bobbin of the first invention. And a terminal portion.

According to a third aspect of the present invention, there is provided a rotary electric motor in which the stator according to the first aspect of the present invention is resin-molded.

According to a fourth aspect of the present invention, there is provided a method of manufacturing a rotary electric motor according to the first aspect, wherein the coil bobbin is bent so that the thin portion is located on the inner diameter side, and the coil bobbin is oppositely assembled. The coil is wound around the coil bobbin in that state, and after the coil is wound, the coil bobbin is inverted so that the thin portion is on the outer diameter side, and fitted to the coil bobbin before or after the coil is wound. The stator is configured by fixing the inserted magnetic pole teeth to the outer yoke.

[0019]

In the rotary electric motor according to the first aspect of the present invention, since the coil bobbin fitted to the magnetic pole teeth of the stator core is non-annularly connected by a thin portion on the outer diameter side of the magnetic pole teeth, the thin-walled portion can be extended or reversed. By bending the coil bobbin to the side, the coil bobbins can be arranged in a straight line or in an inverted circle. In this case, at the time of assembly, the coil bobbins are radially arranged following the magnetic pole teeth, so that the interval between adjacent coil bobbins on the outer diameter side is wider than the interval between adjacent coil bobbins on the inner diameter side. Therefore, the pitch between the coil bobbins when the coil bobbins are arranged in a straight line is longer when the coils are connected on the outer diameter side than when the coils are connected on the outer diameter side, and the space between the coil bobbins is wider. In the case of being bent to the opposite side and arranged in an annular shape, the interval between adjacent coil bobbins becomes wider. For this reason, the winding space of each coil bobbin is widened, so that the winding can be easily arranged and arranged, and the winding of the winding nozzle for sending out the winding becomes easy, and the space of the slot portion is effectively occupied by the winding. Will be able to In addition, since the coil bobbins are connected and integrated, continuous winding can be performed without breaking the crossover between the coils of the same phase, and the number of times of connection of the coil terminals can be minimized.

In the rotary electric motor according to the second aspect of the present invention, in addition to the operation of the first aspect, the neutral point terminal portion and the connector terminal portion are provided on the outer diameter side of the coil bobbin. The end can be directly drawn to the neutral terminal portion and the connector terminal portion by an automatic machine.

In the rotary electric motor according to the third aspect of the present invention, since the stator of the first aspect is integrally molded with a resin, heat radiation is improved.

According to a fourth aspect of the present invention, in the method of manufacturing a rotary electric motor, the coil is wound on the coil bobbin with the thin portion of the coil bobbin being on the inner diameter side.
Since the resin coil bobbin is inverted so that the thin portion is on the outer diameter side, the space between adjacent coil bobbins during winding can be considerably large, and the degree of freedom in manipulating the winding nozzle is expanded. As a result, the winding can be easily performed, and the space of the slot portion can be effectively occupied by the winding.

[0023]

[Embodiment 1] An embodiment of the present invention will be described below with reference to the drawings. FIG.
FIG. 1 is a front view showing a rotary electric motor (an AC brushless motor in this example) according to an embodiment of the present invention. In this figure, 1 is a stator core, 4 is a coil, 5 is a coil bobbin made of resin, 8 is a stator core 1 and a coil bobbin 5.
And a coil 4, and a stator 10 is a rotor.
Note that the coil bobbin 5 only needs to have insulating properties, and does not necessarily have to be made of resin.

FIG. 2 is a front view showing the stator core 1. The stator core 1 has the same number (six in this example = 3 phases × 2) of separated and independent magnetic pole teeth (magnetic pole teeth) 2 as the number of the slot portions 14 and a substantially ring-shaped outer yoke arranged on the outer diameter side thereof. It is divided into three. Magnetic pole teeth 2
The outer yoke 3 is constituted by a laminated iron core. That is, a thin plate made of a magnetic material is punched out by a press and crimped to form a block-shaped laminate. The outer yoke 3 has a regular hexagonal hole 3a at the center, and a fitting recess 3b provided at the center of each side (linear portion) on the inner periphery of the hexagonal hole 3a. (The end on the outer diameter side) is fitted. Before assembly, each magnetic pole tooth 2 is independent. The rotor facing portion 2a of the magnetic pole teeth 2, which faces the rotor 10 on the inner diameter side during assembly, is formed in a flange shape.

FIG. 3A shows the correspondence between the coiled bobbin linked body 15 formed of resin and each magnetic pole tooth 2.
The coil bobbin connector 15 connects the six coil bobbins 5 fitted to the six magnetic pole teeth 2 in a non-annular manner (a non-annular state means that one portion is disconnected and disconnected). The outer yoke 3 is formed to have a size that fits into the hexagonal hole 3a of the outer yoke 3 during assembly. If the resin material is, for example, a polypropylene resin, a nylon resin, or an ABS resin, the moldability is good,
Softness that can withstand several bendings is obtained. FIG. 3 (b)
Indicates a state in which the magnetic pole teeth 2 are attached to the respective coil bobbins 5 of the coil bobbin connector 15. The connecting portions of the coil bobbins 5 are each provided with a thin portion 15a. The thin portion 15a is a portion formed to be thin so as to be flexible and bendable. The thin portion 15a is formed to have a length from one end to the other end in the width direction of the coil bobbin 5 (= axial direction of the coil bobbin 5) as shown in FIG.

As shown in FIG. 5, a projection 16 for hooking a crossover or the like may be provided on both sides of the thin portion 15a. As another example of the thin portion 15a, a hole 17 may be formed in the center of the thin portion 15a as shown in FIG.
As shown in FIG. 7, notches 18 may be provided at both ends of the thin portion 15a. Thus, the hole 17 and the notch 18 are formed in the thin portion 15a.
Is provided, the thin portion 15a is more easily bent.
Note that a crossover wire may be hooked on the notch 18 shown in FIG. 7 and may be used instead of the protrusion 16 in FIG.

The coil bobbin connector 15 is accommodated in a hexagonal hole 3a of the outer yoke 3, as shown in FIG. Each coil bobbin 5 of the coil bobbin connection body 15 is connected at a portion on the outer diameter side when housed in the hole 3 a of the outer yoke 3, that is, when the coil bobbin 5 is assembled as the stator 8. Since the coil bobbins 5 are arranged radially at the time of assembly, when they are connected to each other on the outer diameter side, they are thinner than those when they are connected to each other on the inner diameter side, as shown in FIG. When 15a is extended and opened in a straight line, the distance between adjacent ones increases.

FIG. 15 shows a case where the coil bobbin 5 is wound. The thin portion 15a is bent in a direction opposite to a normal state (a state at the time of assembly), and the coil bobbin connection body 15 is turned upside down. When rounded, the interval between adjacent coil bobbins 5 is further increased. Therefore, in any case, the space between the adjacent coil bobbins 5 is widened, so that the coil 4 can be easily wound around the coil bobbins 5, and can be easily aligned and wound using the winding nozzle of the winding machine. Will be able to do it.

As shown in FIG. 1, each coil bobbin 5 of the coil bobbin connector 15 is fitted to the magnetic pole teeth 2 with the coil 4 wound in a concentrated manner. The outer ends of the magnetic pole teeth 2 are fitted and fixed to the outer yoke 3 so that the hexagonal holes 3 of the outer yoke 3 are formed.
a and is held by the magnetic pole teeth 2, thereby forming the stator 8.

FIG. 8 shows a connection state of the coil 4, and FIG. 9 shows a winding direction and an arrangement relation of the coil 4. Coil 4
There are three phases, U-phase, V-phase, and W-phase. In this example, Y-connection is performed. It is needless to say that Δ connection may be used instead of Y connection. In FIG. 8, P indicates a neutral point, and Q1, Q2, and Q3 indicate connector-side terminals of U, V, and W phase coils. There are two U-phase coils Ua and Ub, two V-phase coils Va and Vb, and two W-phase coils Wa and Wb. In-phase coils are arranged at positions facing each other by 180 degrees, and are connected in series. The coils of the same phase that are opposed by 180 degrees are connected by a crossover, and are not cut in the middle but are continuously wound. This is possible because the coil bobbins 5 are interconnected. The direction of the winding of each coil is as shown in FIG. In FIG. 9, YA is the head of the arrow,
YS represents the tail of the arrow, and the direction of the arrow is the direction of the winding.

Next, the operation will be described. FIG. 15 shows a state where the coil 4 is wound around the coil bobbin 5.
Since FIG. 15 is used in common with the other embodiments, details are slightly different from those of the present embodiment. When the coil 4 is wound around the coil bobbin 5, as shown in FIG. 15, the coil bobbin connection body 15 is rounded in a substantially annular shape on the side opposite to the state at the time of assembly (that is, the side facing the rotor is outside, and the thin-walled portion 15
(a) is rounded in an annular shape with the inner diameter side), and the space between the adjacent coil bobbins 5 is increased. Beforehand, coil bobbin 5
When the magnetic pole teeth 2 are attached to each other and the work is performed while holding the coil bobbin connection body 15 using the magnetic pole teeth 2, winding can be performed efficiently. In this case, the windings of the coils 4 in the same phase can be continuously wound without cutting the crossovers because the coil bobbins 5 are all connected. In addition, since the crossover is hooked on the protrusion 16 shown in FIG. 5, it does not become a hindrance during assembly.

When the coil 4 is wound, the coil bobbin connection body 15 is inverted, rounded to a normal state, and the magnetic pole teeth 2 are fitted and fixed to the outer yoke 3 to form the stator 8. Note that the coil 4 may be wound around the coil bobbin 5 without winding the magnetic pole teeth 2 at the time of winding, and the magnetic pole teeth 2 may be mounted on the coil bobbin 5 immediately before fitting to the outer yoke 3.

Embodiment 2 FIG. FIG. 10 is a front view of a rotary electric motor according to an embodiment of the second aspect of the present invention, FIG. 11 (a) is a view showing the relationship between the coil bobbin connection 15 and the magnetic pole teeth 2, and FIG. FIG. 4 is a diagram showing a state where the magnetic pole teeth 2 are mounted on the coil bobbin 5. The difference of the second embodiment from the first embodiment is that a neutral terminal 21 for connecting a neutral terminal of the coil 4 and a connector terminal for connecting a connector terminal are provided on the outer diameter side of the coil bobbin connector 15. This is the point that the unit 22 is provided integrally. Other than that is the same as the first embodiment.

The neutral terminal 21 and the connector terminal 22 are arranged at positions facing each other by 180 degrees, and are integrally formed so as to protrude outside the coil bobbin 5, respectively.
The neutral point terminal portion 21 has three mutually connected connection terminals 21a, 21b, and 21c for joining the coil terminals. Further, the connector terminal portion 22 has three independent connection terminals 22a, 22b, and 22c whose distal ends are connector terminals 23a, 23b, and 23c, respectively.

Next, the operation will be described. When the coil 4 is wound, as shown in FIG. 12, the coil is wound continuously without cutting the crossover between the coils of the same phase, and the start and end of the coil of the same phase are respectively connected to the connector terminal portion 22 and the neutral terminal portion. 21 is automatically kinked by a winding machine and joined. This makes it possible to automatically process all of the coil connections with the winding machine, and to obtain a rotary motor that is inexpensive and free from poor connection.

Embodiment 3 FIG. FIG. 13 is a front view of a rotary motor according to an embodiment of the third aspect of the present invention, and FIG. 14 is a side sectional view of the rotary motor. In the figure, 30 is a mold resin (resin), 31 is a motor flange, 32 is a rotor shaft, 33 is a rotor core arranged outside the rotor shaft 32, 34 is a rotor magnet arranged on the outer periphery of the rotor core 33, and 35 is a rotor magnet. This is a rotor bearing that rotatably supports the rotor shaft 32. In the rotary electric motor of the third embodiment, after the stator 8 is formed in the same manner as in the first or second embodiment, the outer periphery of the stator 8 excluding the rotor 10 and the inside of the slot portion 14 including the coil 4 are made of epoxy resin or the like. Is molded with the molding resin 30. Thus, when the stator 8 is resin-molded, the heat radiation of the coil 4 is improved.

Embodiment 4 FIG. FIG. 15 is an explanatory view of an embodiment of the invention of claim 4, and FIG. 16 is an explanatory view showing the order of windings. 15 and 16,
40 is a winding flyer of an automatic winding machine, 41 is an index part, 12 is a winding, and 13 is a winding nozzle. The winding flyer 40 is driven to rotate around a reference line 45, and has a winding nozzle 13 at the tip.
The winding nozzle 13 has a tip directed in the direction of the reference line 45, and sends out the winding 12 from the tip in the direction of the reference line 45.
The index portion 41 is formed of a cylindrical body or a cylindrical body, and is driven to rotate about a rotation center 46 orthogonal to the reference line 45. On the outer periphery of the index portion 41,
Positioning recesses 41a are provided at six locations in the circumferential direction.

When the stator 8 of the first or second embodiment is constructed, the coil 4 is wound around the coil bobbin 5 as shown in FIG. That is, first, the magnetic pole teeth 2 are mounted on each coil bobbin 5 of the coil bobbin connection body 15. After that, the rotor facing portion 2 of the magnetic pole teeth 2 facing the rotor
The outer end of the magnetic pole teeth 2 (located on the inner peripheral side in this case) is bent by bending the thin portion 15a so that the outer portion a is outside, and rounding the thin portion 15a into an annular shape opposite to the normal assembled state. 41 is fitted into the positioning recess 41 a on the outer periphery. In this state, the coil bobbins 5 project radially outward, and the interval between the adjacent coil bobbins 5 is considerably widened. This is because the coil bobbin 5 is connected on the outer diameter side instead of connecting the coil bobbin 5 on the inner diameter side.

Then, the coil bobbin 5 for applying the winding is positioned on the reference line 45 by turning the index portion 41, and the winding flyer 40 is moved around the reference line 45 while sending the winding 12 from the winding nozzle 13. To orbit,
In synchronization therewith, the winding flyer 40 is moved in parallel along the reference line 45. Thereby, the winding 12 is connected to the coil bobbin 5.
Can be wound in a line. In addition, since the space between the coil bobbin 5 on which the coil is wound and the adjacent coil bobbin 5 can be increased, the stacking height of the windings can be freely controlled.
The coil 4 can be wound in the shape of a truncated cone with a larger winding diameter on the base end side. Therefore, as shown in FIG. 1, FIG. 10, etc., the space of the slot portion 14 can be effectively occupied by the coil 4. In this embodiment, the winding 12
Can be wound from the side of the coil bobbin 5, so that the winding space can be secured without limitation, and the high-density coil 4 can be formed with high accuracy.

FIG. 16 shows a state in which the winding is performed. As shown in this figure, an in-phase coil such as U
a and Ub are continuously wound without cutting the crossover 50. When the terminals at the start and end of the winding are provided with the neutral terminal 21 and the connector terminal 22, each terminal 21, 2
2 to the corresponding connection terminal.

When the winding is completed, the connected coil bobbin 15 is removed from the index portion 41 and the connected coil bobbin 15 is inverted. That is, the thin portion 15a is bent so that the rotor facing portion 2a of the magnetic pole tooth 2 is on the inside, and the coil bobbin connection body 15 is rounded in an annular shape. And
The magnetic pole teeth 2 and the coil bobbin connection body 15 are accommodated in the hexagonal holes 3a of the outer yoke 3, and each magnetic pole tooth 2 is fitted into the fitting concave portion 3b of the outer yoke 3. Thus, the stator 8 shown in FIG. 1 or FIG. 10 is configured.

In the fourth embodiment, an in-phase coil can be continuously wound without cutting the crossover 50, so that an extra manufacturing step is unnecessary. In addition, the coil 4 can be wound in a line and the slot portion 14 (see FIGS. 1 and 10).
Is effectively used as the space occupied by the coil 4,
The output of the rotary motor can be increased, the characteristics can be stabilized, and the size can be reduced.

The coil 4 may be formed on the coil bobbin 5 without mounting the magnetic pole teeth 2 at the time of winding, and the magnetic pole teeth 2 may be mounted on the coil bobbin 5 immediately before the magnetic pole teeth 2 are fitted on the outer yoke 3. .

[0044]

As described above, according to the first aspect of the present invention, the coil bobbin fitted to the magnetic pole teeth of the stator core is non-annularly connected by a thin portion on the outer diameter side of the magnetic pole teeth. In addition, the space at the time of winding of each coil bobbin can be widened. For this reason, the winding freedom of the winding nozzle of the winding machine is increased, and the alignment winding can be easily performed, and the space of the slot portion can be occupied by the winding, and the coil density is high.
It is possible to obtain a stable and small rotating electric motor having good characteristics. In addition, continuous winding can be performed without cutting the crossover between coils of the same phase, and the number of times of connection of the coil terminals can be minimized. This eliminates the need for an extra connection process and is inexpensive. In addition, there is an effect that a rotary motor having no poor connection can be obtained.

According to the second aspect of the present invention, the neutral point terminal portion and the connector terminal portion are provided on the outer diameter side of the coil bobbin of the first aspect of the present invention. Can be directly routed to the neutral terminal portion and the connector terminal portion by an automatic machine. Therefore, in addition to the effect of the first aspect of the present invention, all the connections of the coil can be automatically processed by the winding machine, so that there is an effect that a rotary electric motor which is inexpensive and free from poor connection can be obtained.

According to the third aspect of the present invention, since the stator of the first aspect of the present invention is integrally molded with a resin, the heat dissipation is good, and in addition to the effect of the first aspect of the present invention, the noise of the magnetic noise is reduced. There is an effect that a low rotating electric motor can be obtained.

According to the fourth aspect of the present invention, the coil is wound around the coil bobbin with the thin portion of the coil bobbin being on the inner diameter side, and after the coil is wound, the coil bobbin is inverted so that the thin portion is on the outer diameter side. With such a configuration, the space between adjacent coil bobbins at the time of winding can be considerably large, and the aligned winding can be easily performed.
The space of the slot can be effectively occupied by the winding. Therefore, there is an effect that a small-sized and high-torque motor having a high coil density can be obtained at low cost.

[Brief description of the drawings]

FIG. 1 is a front view of a stator of a rotary electric motor according to Embodiment 1 of the present invention.

FIG. 2 is a front view of a stator core of the rotary electric motor according to Embodiment 1 of the present invention.

FIG. 3 is a front view of a magnetic pole tooth of a stator core and a coil bobbin connection body of the rotary motor according to the first embodiment of the present invention, wherein (a) is a front view showing a state before the two are combined, and (b) is a combination of the two. It is a front view which shows the state after having done.

FIG. 4 is a perspective view showing an example of a thin portion connecting the coil bobbins of the rotary electric motor according to the first embodiment of the present invention.

FIG. 5 is a perspective view showing an example in which a projection is provided on the thin portion.

FIG. 6 is a perspective view showing another example of the thin portion.

FIG. 7 is a perspective view showing still another example of the thin portion.

FIG. 8 is a diagram illustrating an example of a connection state of coils in a stator of the rotary electric motor according to the first embodiment of the present invention.

FIG. 9 is a front view of a stator showing a combination of coil windings in the rotary electric motor according to Embodiment 1 of the present invention.

FIG. 10 is a front view of a stator of a rotary electric motor according to Embodiment 2 of the present invention.

FIG. 11 is a front view of a magnetic pole tooth and a coil bobbin connection body of a stator core of a rotary electric motor according to a second embodiment of the present invention, where (a) is a front view showing a state before both are combined, and (b) is a combination of both. It is a front view which shows the state after having done.

FIG. 12 is a schematic diagram showing a connection relation of coils of a stator of a rotary electric motor according to Embodiment 2 of the present invention.

FIG. 13 is a front view of a stator of a rotary electric motor according to Embodiment 3 of the present invention.

FIG. 14 is a side sectional view of a rotary electric motor according to Embodiment 3 of the present invention.

FIG. 15 is an explanatory diagram of a method of manufacturing a rotary electric motor according to Embodiment 4 of the present invention.

FIG. 16 is an explanatory diagram of a winding order in the manufacturing method.

FIG. 17 is an exploded perspective view of a stator in the rotary electric motor of Conventional Example 1.

FIG. 18 is an exploded perspective view of a stator in a rotary electric motor of Conventional Example 2.

FIG. 19 is an explanatory diagram of how to wind a coil around a coil bobbin, and is a cross-sectional view showing an aligned winding.

FIG. 20 is a cross-sectional view showing a state where the coil is aligned and wound on the coil bobbin using an automatic winding machine.

FIG. 21 is a front view showing a state in which a coil is wound on a coil bobbin using an automatic winding machine.

FIG. 22 is an explanatory diagram of how a coil is wound around a coil bobbin, and is a cross-sectional view illustrating a state where alignment winding cannot be performed.

FIG. 23 is a side sectional view of a rotary electric motor of Conventional Example 3.

FIG. 24 is a front view of a rotary electric motor of Conventional Example 4.

FIG. 25 is a partial perspective view of a magnetic pole teeth portion in the rotary electric motor of Conventional Example 4.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator core 2 Magnetic pole teeth 2a Rotor facing part 3 Outer yoke 4 Coil 5 Coil bobbin 8 Stator 10 Rotor 15a Thin part 21 Neutral terminal part 22 Connector terminal part 30 Mold resin (resin) 32 Rotor shaft 33 Rotor core 34 Rotor magnet 35 Rotor bearing 60 Rectangular part 70 Resin molding material 71 Gap 72 Unevenness 73 Notch (unevenness) 75 Stepped part

────────────────────────────────────────────────── ─── Continuing on the front page (72) Masaru Matsumoto 8-1-1, Tsukaguchi-Honmachi, Amagasaki-shi Mitsubishi Electric Corporation Production System Engineering Center (72) Inventor Yoichi Fujita 8-1-1, Tsukaguchi-Honmachi, Amagasaki-shi No. Mitsubishi Electric Corporation Production System Engineering Center (72) Inventor Yoshimitsu Okawa 5-1-1 Yada Minami, Higashi-ku, Nagoya-shi Mitsubishi Electric Corporation Nagoya Works (72) Inventor Yoichi Ikeda, Yota Minamigo, Higashi-ku, Nagoya No. 1-114, Mitsubishi Electric Corporation Nagoya Works (72) Inventor Hiroki Matsubara 5-1-1, Yada Minami, Higashi-ku, Nagoya-shi Minami 5-chome No. 1-14 Mitsubishi Electric Corporation Nagoya Works (56) References P, U) JitsuHiraku Akira 61-52452 (JP, U) (58 ) investigated the field (Int.Cl. ^7, DB name) H02K 3/00 - 3/52 H02K 15/00 - 15/16

Claims (4)

(57) [Claims] 1. A rotary electric motor comprising: a stator in which a coil bobbin is fitted to a magnetic pole tooth of a stator core and a coil is concentratedly wound around the coil bobbin; and a rotor arranged on the inner diameter side of the stator. Is divided into a plurality of magnetic pole teeth fixed to the inner diameter side of the outer yoke, and the coil bobbins respectively fitted to the magnetic pole teeth are not bent by a thin wall portion which is bendable on the outer diameter side of the magnetic pole teeth. Connect in a ring
And the core in which the thin portions are connected in a non-annular line.
Formed from one end to the other in the width direction of the ilbobin
Rotary electric motor characterized in that it is. 2. A method according to claim 1, wherein a neutral terminal portion for connecting a neutral terminal of the coil and a connector terminal portion for connecting a connector terminal are provided on an outer diameter side of the coil bobbin. 2. The rotary electric motor according to 1. 3. The rotary electric motor according to claim 1, wherein the stator is molded with a resin. 4. A coil bobbin is arranged in an annular shape opposite to that at the time of assembly by bending the coil bobbin so that the thin portion is located on the inner diameter side, and the coil is wound around the coil bobbin in that state. The coil bobbin is inverted so that the thin portion is on the outer diameter side, and a magnetic pole tooth inserted into the coil bobbin is fixed to an outer yoke before or after winding of the coil to form a stator. Manufacturing method of rotating electric motor.