Stator and rotating electrical machine including the stator

Abstract

To prevent flying stones from entering the inside of a rotary electric machine 1 and achieve effective cooling in an outer rotor type rotary electric machine in which a bottomed cylindrical rotor 20 is rotatably supported around a resin-molded stator 10.SOLUTION: A mold part 30 of a stator core 11 has a flange part 37 formed on the protruding part of an outer peripheral surface 31 protruding from a cylindrical part 21 of a rotor 20, the flange part having one protruding surface 37a which faces a tip end surface 21c of the cylindrical part 21 and the other protruding surface 37b which continues to a surface 33 of the mold part 30 so as to extend radially outward within a range not exceeding an outer surface 21e of the cylindrical part 21 of the rotor 20 in the radial direction. A plurality of ventilation grooves 41 extending in the radial direction of the flange part 37 from the outer peripheral surface 31 of the mold part 30 and reinforcing ribs 42 are formed on the surface of the flange part 37 facing the tip end surface 21c of the cylindrical part 21.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a stator provided with a cylindrical stator core having salient poles projecting at a plurality of circumferential positions on the outer periphery at intervals, and a coil wound around the salient poles via an insulating bobbin, and a bottomed cylindrical shape formed coaxially around the stator, and a plurality of permanent magnets provided on the inner surface of a cylindrical tubular portion facing the outer end surface of the salient pole, and a rotor in which the central portion of a bottom plate portion continuous with one end of the tubular portion is rotatably supported by the inner peripheral portion of the stator core. In particular, the present invention relates to a stator structure of an outer rotor type rotating electric machine in which a part of the bobbin and coil of the stator core is molded with a synthetic resin, and a rotating electric machine equipped with the stator structure.

Background Art

[0002] Such an outer rotor type rotating electric machine is already known in Patent Document 1 and the like. In the case of Patent Document 1, by resin molding the stator of the fan motor, it is possible to reduce the number of parts in the outer rotor type motor.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Incidentally, in the device disclosed in Patent Document 1, a shaft 5 is fixed by a molding resin 15 at the center of a resin-molded stator core 2, and one end of the molding resin 15 supported by a single sleeve metal 7 projects from a bottomed cylindrical rotor cup 6, and the side surface of the projecting molding resin 15 projects radially outward as a flange 10. However, this rotor cup 6 does not have an opening for ventilation, and the flange 10 projecting radially outward extends greatly beyond the tip of the cylindrical portion 13 of the rotor cup 6 to near the outer peripheral end of the sirocco fan 9 fixed to the cylindrical portion 13. Therefore, as the temperature of the stator coil 4 rises, cooling of the stator coil 4 becomes a problem. To address this, if the distance between the opposing surfaces of the tip of the cylindrical portion 13 of the rotor cup 6 and the flange 10 is widened to introduce cooling air, then there is a problem that it becomes impossible to prevent the intrusion of flying debris from the outside.

[0005] The present invention has been made in view of such circumstances, and an object thereof is to provide an outer rotor type rotating electrical machine that can effectively cool a coil while molding the entire stator core including the bobbin and the coil with a synthetic resin, and can also prevent the intrusion of flying debris from the outside.

Means for Solving the Problems

[0006] In order to achieve the above object, the present invention provides a stator comprising a cylindrical stator core having salient poles protruding at a plurality of circumferentially spaced positions on the outer periphery, and coils wound around the salient poles via insulating bobbins, and a rotor having a bottomed cylindrical shape surrounding the stator coaxially and having a plurality of permanent magnets provided on an inner surface of a cylindrical portion facing an outer end surface of the salient pole, and a central portion of a bottom plate portion continuous with one end of the cylindrical portion being rotatably supported by an inner peripheral portion of the stator core, which is a stator structure of an outer rotor type rotating electric machine, wherein the stator core has three input electric wires connected to the coils, and a part of the bobbin and the coil are molded with a synthetic resin, and a molded portion of the stator core has an outer peripheral surface facing the inner surface of the cylindrical portion of the rotor, a first surface facing the bottom plate portion of the rotor having an opening formed therein, and a second surface protruding axially outward from the other end of the cylindrical portion of the rotor on the opposite side of the first surface, and a flange portion is formed on a portion of the outer peripheral surface protruding axially outward from the other end of the cylindrical portion such that one protruding surface faces a tip end surface of the other end of the cylindrical portion and the other protruding surface is continuous with the second surface, and extends radially outward within a range not exceeding an outer surface of the cylindrical portion of the rotor in the radial direction, and a plurality of ventilation grooves extending radially from the outer peripheral surface of the molded portion to the flange portion are formed on the one protruding surface of the flange portion, and a reinforcing rib is formed on a portion sandwiched between the plurality of ventilation grooves , on the outer peripheral surface of the mold part, an axial groove is formed which is arranged between the outer end faces of the adjacent salient poles and extends from the first surface to the base end of the flange part, and the axial groove is further formed on the surface of the plurality of ventilation grooves of the flange part and is connected to a radial groove extending radially from the base end in the flange part which is the first feature.

[0007] In addition to the first feature, the present invention The axial groove is connected to a through hole formed at the base end of the flange part and communicating the one protruding surface and the other protruding surface of the flange part which is the second feature.

[0008] In addition, the present invention First or In addition to the second feature , on the second surface of the mold part, a connector mounting part for mounting connectors of three input electric wires connected to the coil is formed on the flange part, and on the one protruding surface of the connector mounting part in the flange part, the ventilation groove and the reinforcing rib extending radially outward from the outer peripheral surface of the mold part in the flange part are formed which is the third feature.

[0009] In addition, the present invention A stator structure of an outer-rotor type rotating electrical machine having a cylindrical stator core with salient poles projecting at intervals in a plurality of circumferential locations on the outer periphery, and coils wound around the salient poles via insulating bobbins, and a rotor formed in a bottomed cylindrical shape surrounding the stator coaxially, with a plurality of permanent magnets provided on the inner surface of a cylindrical portion facing the outer end surface of the salient pole, and a central portion of a bottom plate portion continuous with one end of the cylindrical portion being rotatably supported on the inner peripheral portion of the stator core. The stator core has three input electric wires connected to the coils, and the bobbin and a part of the coils are molded with synthetic resin. The molded portion of the stator core has an outer peripheral surface facing the inner surface of the cylindrical portion of the rotor, a first surface facing the bottom plate portion of the rotor with an opening formed therein, and a second surface protruding axially outward from the other end of the cylindrical portion of the rotor on the opposite side of the first surface. A flange portion is formed on a portion of the outer peripheral surface protruding axially outward from the other end of the cylindrical portion, with one protruding surface facing the tip end surface of the other end of the cylindrical portion and the other protruding surface being continuous with the second surface, extending radially outward beyond the outer surface of the cylindrical portion of the rotor in the radial direction. An extension side wall extending along the outer surface of the cylindrical portion of the rotor toward the first surface side of the molded portion is formed at the radially outer end of the flange portion. A labyrinth passage is formed between the extension side wall of the flange portion and the outer surface of the cylindrical portion, between the one protruding surface of the flange portion and the tip end surface of the other end of the cylindrical portion, and between the outer peripheral surface of the molded portion and the inner surface of the cylindrical portion. Notches are formed at circumferential locations on the extension side wall of the flange portion, and a ventilation groove extending radially outward from the outer peripheral surface of the molded portion to the notch of the extension side wall is formed on the one protruding surface of the flange portion. which is the fourth feature.

[0010] The present invention also provides a stator structure of an outer-rotor type rotating electrical machine, which includes a cylindrical stator core having salient poles projecting at a plurality of circumferential positions on the outer periphery with intervals therebetween, and a stator in which coils are wound around the salient poles via insulating bobbins. The stator is formed in a bottomed cylindrical shape surrounding the stator coaxially, and a plurality of permanent magnets are provided on the inner surface of the cylindrical portion facing the outer end surface of the salient pole. The central portion of the bottom plate portion connected to one end of the cylindrical portion is rotatably supported by the inner peripheral portion of the stator core. The stator core has three input electric wires connected to the coils, and a part of the bobbin and the coil are molded with synthetic resin. The molded portion of the stator core has an outer peripheral surface facing the inner surface of the cylindrical portion of the rotor, a first surface facing the bottom plate portion of the rotor having a plurality of openings for ventilation, and a second surface protruding axially outward from the other end of the cylindrical portion of the rotor on the opposite side of the first surface. A flange portion is formed on a portion of the outer peripheral surface protruding axially outward from the other end of the cylindrical portion, where one protruding surface faces the tip surface of the other end of the cylindrical portion, and the other protruding surface is continuous with the second surface, and extends radially outward within a range not exceeding the outer surface of the cylindrical portion of the rotor in the radial direction. Cooling air flows through the gap between the flange portion and the tip surface of the other end of the cylindrical portion, flows through the rotating electrical machine, cools the coils of the stator, and is configured to escape from the openings in the bottom plate portion of the rotor. A plurality of ventilation grooves extending radially from the outer peripheral surface of the molded portion to the flange portion are formed on the one protruding surface of the flange portion, and reinforcing ribs are provided in a portion sandwiched between the plurality of ventilation grooves which is the fifth feature.

[0011] The present invention also In addition to the fifth feature, axial grooves are formed on the outer peripheral surface of the molded portion, which are arranged between the outer end surfaces of adjacent salient poles and extend from the first surface to the base end portion of the flange portion is characterized by a sixth feature that it is

[0012] The present invention also A stator includes a cylindrical stator core having salient poles projecting at intervals in the circumferential direction on the outer periphery, and coils wound around the salient poles via insulating bobbins. A rotor is formed in a bottomed cylindrical shape surrounding the stator coaxially, and a plurality of permanent magnets are provided on the inner surface of a cylindrical portion facing the outer end surface of the salient pole. The central portion of a bottom plate portion continuous with one end of the cylindrical portion is rotatably supported by the inner peripheral portion of the stator core. In the stator structure of the outer rotor type rotating electric machine, the stator core has three input electric wires connected to the coils, and the bobbins and a part of the coils are molded with synthetic resin. The molded portion of the stator core has an outer peripheral surface facing the inner surface of the cylindrical portion of the rotor, a first surface facing the bottom plate portion of the rotor having a plurality of ventilation openings formed therein, and a second surface protruding axially outward from the other end of the cylindrical portion of the rotor on the opposite side of the first surface. A flange portion is formed on a portion of the outer peripheral surface protruding axially outward from the other end of the cylindrical portion, with one protruding surface facing the tip surface of the other end of the cylindrical portion and the other protruding surface continuous with the second surface, extending radially outward beyond the outer surface of the cylindrical portion of the rotor in the radial direction. An extended side wall extending along the outer surface of the cylindrical portion of the rotor toward the first surface side of the molded portion is formed at the radially outer end of the flange portion. A labyrinth passage is formed between the extended side wall of the flange portion and the outer surface of the cylindrical portion, between the one protruding surface of the flange portion and the tip surface of the other end of the cylindrical portion, and between the outer peripheral surface of the molded portion and the inner surface of the cylindrical portion. Cooling air flows through the gap forming the labyrinth passage in the rotating electric machine to cool the coils of the stator and is configured to escape from the openings in the bottom plate portion of the rotor. is characterized by a seventh feature that it is

[0013] In addition to the seventh feature, the present invention also Notches are provided at circumferential locations on the extended side wall of the flange portion is characterized by an eighth feature that

[0014] Furthermore, the present invention is characterized by a ninth feature that it is a rotating electrical machine equipped with the stator structure of the outer-rotor type rotating electrical machine according to any one of the first to eighth features.

Advantages of the Invention

[0015] The stator structure of the outer-rotor type rotating electrical machine according to the present invention can prevent the intrusion of flying stones into the interior of the outer-rotor type rotating electrical machine, secure the flow path of the cooling air, and cool the stator coil.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

BEST MODE FOR CARRYING OUT THE INVENTION

[0017] The rotating electrical machine 1 according to the embodiment of the present invention can be suitably used as a fan motor having blades attached to the outer periphery of a rotor 20 which is an outer rotor, or a drone motor having a propeller attached to the rotor 20. However, the scope of its application is not limited to these, and for example, it can also be applied as a generator in which the rotor 20 is attached to a rotating body.

[0018] Regarding the first embodiment of the present invention, referring to FIGS. 1 to 6, first, in FIGS. 1 to 3, the stator 10 of this rotating electrical machine 1 includes a cylindrical stator core 11 having salient poles 12 projecting at intervals in a plurality of circumferential positions on the outer periphery, a coil 14 wound around the salient poles 12 via an insulating bobbin 13, and a mounting portion 16 to a support member (not shown) disposed on the inner peripheral portion 15 of the stator core 11 and extending in a cylindrical shape in the axial direction of the stator core 11. , s The stator core 11 , c Three input electric wires 17 of U layer, V layer, and W layer connected to the coil 14 to b A part of the bobbin 13 and the coil 14 is molded with synthetic resin.

[0019] Here, in the present embodiment , b The bobbin 13 is a cylindrical body having a quadrangular cross section extending in the radial direction, but the cross section of the bobbin 13 extending in the radial direction does not have to be quadrangular. . B The bin 13 is formed in a cylindrical shape with flanges at both ends. Specifically, , b The bin 13 is composed of an inner flange portion that constitutes the inner peripheral side portion in the radial direction, an outer flange portion that constitutes the outer peripheral side portion in the radial direction, and a cylindrical portion that connects the inner flange portion and the outer flange portion, and is provided with an insulating material such as synthetic resin that is mounted on the stator core 11, but detailed description thereof is omitted.

[0020] s Around the stator 10 , s A rotor 20 is arranged which is formed in a bottomed cylindrical shape surrounding the stator 10 coaxially, and a plurality of permanent magnets 22 are provided on the inner surface of a cylindrical portion 21 that faces the outer end surface 12a of the salient pole 12 of the stator 10. Also, at one axial end 21a of the cylindrical portion 21 of the rotor 20 , s A bottom plate portion 23 that covers one axial side of the stator 10 is continuously formed, and the central portion 23a of the bottom plate portion 23 is arranged on the inner peripheral portion 15 of the stator core 11 supported and extends to the inner peripheral side of the attachment portion 16 to the holding member , taken and is rotatably supported on the inner peripheral side of the attachment portion 16 via a bearing 24. Also , bottom On the bottom plate portion 23, there is formed a ventilation opening 23b through which cooling air, which will be described later, can flow. Here, the "bottomed cylindrical shape" of the rotor 20 only needs to satisfy the gist that the rotor 20 is formed so as to cover a first surface 32 of the stator core 11 to be described later, and a shape in which other convex portions or openings are formed on the bottom plate portion 23, such as the opening portion 23b, is also included. a plurality of opened

[0021] cylinder , l The mold portion 30 of the stator core 11 faces the outer peripheral surface 31 that faces the inner surface 21d of the portion 21 of the rotor 20 cylinder and the first surface 32 that faces the bottom plate portion 23 of the rotor 20 , l -tor 20 bottom and the inner peripheral surface 34 that faces the attachment portion 16 to the holding member. Also , first On the opposite side of the surface 32 by l -tor 20 cylinder and the second surface 33 that protrudes axially outward from the other end 21b of the portion 21 of the rotor 20 , supported , supported , supported The attachment portion 16 to the holding member is the molding portion 30 of the extends axially up to the two surfaces 33 from the or one surface 32, and a fixing portion 16a is formed at the end on the second surface 33 side so as to protrude outward in the circumferential direction. The fixing portion 16a is a part of the inner peripheral portion 15 of the stator core 11 second surface 33 of molded - The stator core 11 is fixed by a long bolt 36 that penetrates the stator core 11 axially to a fixing surface 35 (see FIGS. 1, 2, and 4) formed by exposing it from the molding portion 30

[0022] Among the outer peripheral surfaces 31 of the molding portion 30 of the stator core 11 , l - rotor 20 cylinder At the portion that protrudes axially from the other end 21b of the portion 21, one protruding surface 37a cylinder portion 21 other is opposed to the tip surface 21c of the end 21b and the other protruding surface 37b second is flush with or smoothly continuous with the surface 33 in a step, and a flange portion 37 that extends outward in the radial direction by l - rotor 20 cylinder is formed so as not to exceed the outer surface 21e of the portion 21 in the range radial outside. The flange portion 37 one one protruding surface 37a and cylinder portion 21 tip Cooling air that flows through the interior of the rotating electric machine 1 and cools the coil 14 of the stator 10 can flow in from the gap 40 formed between the flange portion 37 and the tip surface 21c of the portion 21 and escape from the opening portion 23b of the rotor bottom plate portion 23 opening If the gap 40 between the flange portion 37 and the tip surface 21c is too large, it is impossible to prevent the intrusion of flying stones. Conversely, if it is too small, the cooling air for cooling the coil 14 cannot flow sufficiently. However, in the present embodiment, the length of the flange portion 37 is limited to the length within the range that does not exceed the outer surface 21e of the rotor 20 in the radial direction, and as shown in FIG. 3

[0023] f The flange portion 37 and extending l - rotor 20 tip The gap 40 between the tip surface 21c is such that if it is too large, it is impossible to prevent the intrusion of flying stones, and if it is too small, the cooling air for cooling the coil 14 cannot flow sufficiently. However, in the present embodiment, the length of the flange portion 37 is limited to the length within the range that does not exceed the outer surface 21e of the rotor 20 in the radial direction, and as shown in FIG. 3 , cylinder is opposed to the tip surface 21c of the other end 21b of the portion 21 extending f flange portion 37 one On the protruding surface 37a , m From the outer peripheral surface 31 of the bonded portion 30 from f Since a plurality of ventilation grooves 41 are formed extending radially outward to the outer end 37c of the flange portion 37, the coil 14 can be effectively cooled even if the flange portion 37 is positioned close to the other end 21b of the tubular portion 21 of the rotor 20 to prevent the intrusion of flying stones. Moreover, a higher reinforcing rib 42 is formed in the portion sandwiched between the two ventilation grooves 41 on one protruding surface 37a of the flange portion 37, so the strength of the flange portion 37 can be ensured even if ventilation grooves are recessed in the flange portion 37. The cross-sectional shape of this reinforcing rib 42 can be any shape, such as square, triangular, or semicircular.

[0024] As shown in FIG. 5, the outer peripheral surface 31 of the molded portion 30 is provided with a plurality of grooves 12a disposed between the outer end surfaces 12a of the adjacent salient poles 12. first An axial groove 43 may be formed extending from the surface 32 to the base end 37d of the flange portion 37, and the axial groove 43 may be formed in the base end 37d of the flange portion 37. f The flange portion 37 may be further connected to a through hole 44 that communicates between one protruding surface 37a and the other protruding surface 37b of the flange portion 37. As shown in Fig. 6, the axial groove 43 may be connected to a radial groove 45 that is further formed on the surface of the ventilation groove 41 of the flange portion 37 and extends from the base end 37d to the outer end 37c of the flange portion 37.

[0025] Next, the effects of the first embodiment will be described.

[0026] In the first embodiment of the present invention, a flange portion 37 is formed on the outer peripheral surface 31 of the molded portion 30 of the stator core 11 at a portion that protrudes from the other end 21b of the cylindrical portion 21 of the rotor 20, and this flange portion 37 extends outward within a range that does not exceed the outer surface 21e of the cylindrical portion 21 of the rotor 20. , cylinder Even if someone tries to enter from the open side (the other end 21b side) of the part 21, the entry of such a stepping stone is difficult. f This can be prevented by the flange 37.

[0027] Also, in this flange portion 37, cylinder one protruding surface 37a facing the other end tip surface 21c of the portion 21 and , cylinder from the gap 40 formed between the other end tip surface 21c of the portion 21, cooling air that has flowed through the rotating electrical machine 1 and cooled the coil 14 of the stator 10 can be made to flow in from the opening 23b of the rotor bottom plate portion 23. However, if the gap 40 is too large, it is impossible to prevent the intrusion of flying stones, and conversely, if it is too small, the cooling air for cooling the coil cannot flow sufficiently. However, in the first embodiment of the present invention , f the flange portion 37 only extends to a length within a range that does not exceed the outer surface 21e of the cylindrical portion 21 of the rotor 20 in the radial direction, and moreover, the flange portion 37 one on the one protruding surface 37a, a plurality of ventilation grooves 41 extending radially outward to the outer peripheral surface 31 of the mold portion 30 or from f to the outer end 37c of the flange portion 37 are formed. Therefore, in order to prevent the intrusion of flying stones, even if the flange portion 37 is brought closer to the other end 21b of the cylindrical portion 21 of the rotor 20 and the distance between the one protruding surface 37a of the flange portion 37 and the other end 21b of the cylindrical portion 21 of the rotor 20 is narrowed , through the coil 14 can be sufficiently cooled by the cooling air flowing in from the ventilation grooves 41.

[0028] Moreover, a stepped reinforcing rib 42 is formed in the portion sandwiched between the two ventilation grooves 41 on the one protruding surface 37a of the flange portion 37. Therefore, even if the ventilation grooves 41 are recessed in the flange portion 37, the strength of the flange portion 37 can be ensured.

[0029] Also, on the outer peripheral surface 31 of the mold portion 30, an axial groove 43 is formed that is arranged between the outer end surfaces 12a of adjacent salient poles 12 and extends from the surface 32 of the outer peripheral surface 31 of the mold portion 30 to the base end portion 37d of the flange portion 37. By this, the cooling air flowing in from the ventilation grooves 41 of the flange portion 37 formed on the opposing surface to the cylindrical portion tip surface 21c of the rotor 20 can be effectively sent to the opening 23b of the rotor bottom plate portion 23 by this axial groove 43. first

[0030] ​Furthermore, this axial groove 43 expands the flow path of cooling air between the inner surface 21d of the cylindrical portion of the rotor 20 and the outer peripheral surface 31 of the molded portion, thereby reducing the flow speed of the cooling air flowing through that portion and increasing the residence time of the cooling air in that portion, thereby improving the cooling effect. In addition, the axial groove 43 allows the molded portion outer peripheral surface 31 to be hollowed out, which can contribute to reducing the weight of the molded portion 30.

[0031] The axial groove 43 is formed in the base end portion 37d of the flange portion 37. f By connecting one protruding surface 37a of the flange portion 37 to the other protruding surface 37b through a through hole 44, the passage for cooling air can be increased, thereby improving the cooling effect, and the through hole 44 can also be used to remove weight from the flange portion 37, which can contribute to reducing the weight of the molded portion 30.

[0032] Furthermore, if this axial groove 43 is connected to a radial groove 45 that is further formed on the surface of the ventilation groove 41 of the flange portion 37 and extends radially from the base end portion 37d of the flange portion 37, the number of paths for cooling air can be further increased, thereby improving the cooling effect and further increasing the amount of weight reduction in the flange portion 37.

[0033] Moreover, in this first embodiment, the ventilation grooves 41, axial grooves 43, reinforcing ribs 42, etc. are not provided on the cylindrical portion 21 side of the rotor 20, but are provided on the resin-molded flange portion 37, which makes their formation easier and increases the degree of freedom in design.

[0034] Next, a second embodiment of the present invention will be described with reference to Figures 7 and 8. Parts corresponding to those in the first embodiment will be illustrated with the same reference symbols, and detailed descriptions will be omitted.

[0035] In the second embodiment of the present invention, as shown in FIG. 7, a molded portion 30 of a stator core 11 is second On surface 33, a connector attachment portion 37e for attaching connectors 46 of three input wires 17 of U layer, V layer, and W layer connected to coil 14 is provided by extending flange portion 37 f It is different from the first embodiment only in that the connector attachment portion 37e is formed integrally with the flange portion 37, and further, on the back surface of the connector attachment portion 37e in the flange portion 37, as shown in FIG. 8, a ventilation groove 41 and a reinforcing rib 42 extending radially outward from the outer peripheral surface 31 of the mold portion 30 to the outer end 37c of the flange portion 37 are formed by extension. Note that , c The connector attachment portion 37e may be formed separately from the flange portion 37, and the ventilation groove 41 and the reinforcing rib 42 may be provided on the connector attachment portion 37e side.

[0036] According to this second embodiment , f The connector attachment portion 37e is provided in the extended portion of the flange portion 37 f Since it is formed integrally with the flange portion 37, it is possible to reduce the number of parts and the man-hours for assembly, resulting in cost reduction. Moreover, on the back surface of the connector attachment portion 37e in the flange portion 37, a ventilation groove 41 and a reinforcing rib 42 extending radially outward from the outer peripheral surface 31 of the mold portion 30 to the outer end 37c of the flange portion 37 are formed by extension. Therefore, even if the flange portion 37 is extended, the cooling effect by the ventilation groove 41 can be ensured, and the strength of the extended flange portion 37 can also be ensured by the reinforcing rib 42 between the ventilation grooves 41.

[0037] Next, a third embodiment of the present invention will be described with reference to FIGS. 9 and 10. Parts corresponding to those in the first embodiment are only shown with the same reference numerals, and detailed description thereof will be omitted.

[0038] In the third embodiment of the present invention, as shown in FIG. 9, a flange portion 37 formed on a protruding portion of the outer peripheral surface 31 of the mold portion 30 of the stator core 11, from the other end 21b of the cylindrical portion 21 of the rotor 20 axially is formed so as to extend outward beyond the outer side surface 21e of the cylindrical portion 21 of the rotor 20 in the radial direction. Along the outer side surface 21e of the cylindrical portion 21 of the rotor 20, at the radially outer end 37c of the flange portion 37, of the mold portion 30 first An extension side wall 47 extending to the side of surface 32 is formed, and the flange portion 37 extension Between the long side wall 47 and the outer surface 21e of the cylindrical portion 21, between one protruding surface 37a of the flange portion 37 facing the other end tip surface 21c of the cylindrical portion 21 and the other end tip surface 21c of the cylindrical portion 21, and between the outer peripheral surface 31 of the mold portion 30 and the inner surface 21d of the cylindrical portion 21, a labyrinth passage is formed, which is different from the first embodiment.

[0039] Also, in this third embodiment, as shown in FIG. 10, the flange portion 37 extension A plurality of notches 48 may be formed at equal or unequal intervals in the circumferential direction of the long side wall 47, or on one protruding surface 37a of the flange portion 37, a plurality of ventilation grooves 41 extending radially outward from the outer peripheral surface 31 of the mold portion 30 to the notch 48 of the extension side wall 47 may be formed. extending On the other hand, on the protruding surface 37a, from the outer peripheral surface 31 of the mold portion 30 to the extension side wall 47 one It is also possible to form a plurality of ventilation grooves 41 that extend radially outward to the notch 48.

[0040] According to this third embodiment, at the radially outer end 37c of the flange portion 37, an extension side wall 47 extending to the side of surface 32 of the mold portion 30 along the outer surface 21e of the cylindrical portion 21 of the rotor 20 is formed, and the flange portion 37 first An extension side wall 47 extending to the side of surface 32 is formed, and the flange portion 37 extension Between the long side wall 47 and the outer surface 21e of the cylindrical portion 21, between the protruding surface 37a of the flange portion 37 and the tip surface 21c of the other end 21b of the cylindrical portion 21, and between the outer peripheral surface 31 of the mold portion 30 and the inner surface 21d of the cylindrical portion 21, a labyrinth passage is formed. Therefore, not only can the intrusion of flying chips from the outside be reliably prevented while ensuring the circulation of the cooling air through this labyrinth passage, but also the intrusion of water into the rotating electrical machine 1 can be prevented. one Also, by forming notches 48 at circumferential locations of the extension side wall 47 of the flange portion 37, or by forming ventilation grooves 41 that extend radially outward from the outer peripheral surface 31 of the mold portion 30 to the notch 48 of the extension side wall 47 on one protruding surface 37a of the flange portion 37, a flow path for the cooling air that cannot be ensured only by the labyrinth passage can be ensured by these notches 48 and ventilation grooves 41 of the extension side wall 47.

[0041] Also, by forming notches 48 at circumferential locations of the extension side wall 47 of the flange portion 37, or by forming ventilation grooves 41 that extend radially outward from the outer peripheral surface 31 of the mold portion 30 to the notch 48 of the extension side wall 47 on one protruding surface 37a of the flange portion 37 extending On the other hand, on the protruding surface 37a, from the outer peripheral surface 31 of the mold portion 30 to the extension side wall 47 one By forming ventilation grooves 41 that extend radially outward to the notch 48, a flow path for the cooling air that cannot be ensured only by the labyrinth passage can be ensured by these notches 48 and ventilation grooves 41 of the extension side wall 47.

[0042] As described above, the embodiments of the present invention have been explained. However, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in the claims. For example, in the second and third embodiments of the present invention, it is also possible to arrange a plurality of axial grooves between the outer end faces of adjacent salient poles.

[0043] In addition, the embodiments may be specified by the following items.

[0044] [Item 1] A stator structure of an outer rotor type rotating electric machine having a cylindrical stator core (11) with salient poles (12) projecting at multiple locations in the circumferential direction of the outer periphery at intervals, and a coil (14) wound around the salient poles (12) via an insulating bobbin (13), and a rotor (20) formed in a bottomed cylindrical shape surrounding the stator (10) coaxially, with a plurality of permanent magnets (22) provided on the inner surface (21d) of a cylindrical portion (21) facing the outer end face (12a) of the salient pole (12), and the central portion (23a) of a bottom plate portion (23) connected to one end (21a) of the cylindrical portion (21) being rotatably supported by the inner peripheral portion (15) of the stator core (11), The stator core (11) is molded with a synthetic resin for three input electric wires (17) connected to the coil (14), as well as a part of the bobbin (13) and the coil (14). The mold part (30) of the stator core (11) has an outer peripheral surface (31) facing the inner surface (21d) of the cylindrical part (21) of the rotor (20), a first surface (32) facing the bottom plate part (23) of the rotor (20) in which the opening part (23b) is formed, and a second surface (33) protruding axially outward from the other end (21b) of the cylindrical part (21) of the rotor (20) on the opposite side of the first surface (32). A flange part (37) is formed such that one protruding surface (37a) faces the tip surface (21c) of the other end (21b) of the cylindrical part (21) and the other protruding surface (37b) is continuous with the second surface (33) in a portion of the outer peripheral surface (31) protruding axially outward beyond the other end (21b) of the cylindrical part (21), and extends radially outward within a range not exceeding the outer surface (21e) of the cylindrical part (21) of the rotor (20) in the radial direction. A plurality of ventilation grooves (41) extending radially from the outer peripheral surface (31) of the mold part (30) to the flange part (37) are formed in the one protruding surface (37a) of the flange part (37), and a reinforcing rib (42) is formed in a portion sandwiched between the plurality of ventilation grooves (41). A stator structure of an outer rotor type rotating electrical machine is characterized by this. According to this, even if flying debris from the outside tries to enter from the released side (the other end 21b side) of the cylindrical part 21 in the rotor 20, the intrusion of such flying debris can be blocked by the flange part 37 of the stator core 11. Also, since the flange part 37 extends only up to the length within a range not exceeding the outer surface of the cylindrical part 21 of the rotor 20 in the radial direction, and moreover, ventilation grooves 41 are formed in one protruding surface 37a of the flange part 37, even if the flange part 37 is brought close to the other end 21b of the cylindrical part 21 of the rotor 20 to avoid the intrusion of flying debris, the coil 14 can be sufficiently cooled by the cooling air flowing in from the ventilation grooves 41. In addition, a stepped reinforcing rib 42 is formed in a portion sandwiched between two ventilation grooves 41 on one protruding surface 37a of the flange portion 37. Therefore, even if the ventilation grooves 41 are recessed in the flange portion 37, the strength of the flange portion 37 can be ensured. Such ventilation grooves 41 and reinforcing ribs 42 can also be provided on the other end tip surface 21c of the cylindrical portion 21 of the rotor 20. However, in the present invention, since they are provided on the resin-molded flange portion 37, their formation becomes easy and the degree of freedom in design also increases.

[0045] [Item 2] The stator structure of the outer rotor type rotating electrical machine according to Item 1, wherein an axial groove 43 is formed on the outer peripheral surface 31 of the mold portion 30 and is disposed between the outer end surfaces 12a of the adjacent salient poles 12 and extends from the first surface 32 to the base end portion 37d of the flange portion 37. According to this, the cooling air flowing in from between the other end 21b of the cylindrical portion 21 of the rotor 20 and one protruding surface 37a of the flange portion 37 can be effectively sent to the opening 23b of the rotor bottom plate portion 23 by this axial groove 43. Moreover, since the flow path of the cooling air between the inner side surface 21d of the cylindrical portion of the rotor 20 and the outer peripheral surface 31 of the mold portion is expanded by this axial groove 43, the flow velocity of the cooling air flowing through this portion can be decreased and the residence time of the cooling air in this portion can be increased, thereby increasing the cooling effect. Moreover, since the axial groove 43 can reduce the thickness of the outer peripheral surface 31 of the mold portion, it can also contribute to the weight reduction of the mold portion 30.

[0046] [Item 3] The stator structure of the outer rotor type rotating electrical machine according to Item 2, wherein the axial groove 43 is formed at the base end portion 37d of the flange portion 37 and is connected to a through hole 44 that communicates the one protruding surface 37a and the other protruding surface 37b of the flange portion 37. According to this, since the axial groove 43 is connected to the through hole 44 that communicates the one protruding surface 37a and the other protruding surface 37b of the flange portion 37, the passageway of the cooling air can be increased and the cooling effect can be enhanced. At the same time, since the through hole 44 can be used to reduce the thickness of the flange portion 37, it can also contribute to the weight reduction of the mold portion 30.

[0047] [Item 4] The stator structure of the outer rotor type rotating electric machine according to item 2, wherein the axial groove (43) is further formed on the surface of the plurality of ventilation grooves (41) of the flange portion (37) and is connected to a radial groove (45) extending in the radial direction of the flange portion (37) from the base end portion (37d). According to this, since the axial groove 43 is further formed on the surface of the ventilation groove 41 of the flange portion 37 and is connected to the radial groove 45 extending in the radial direction of the flange portion 37 from the base end portion 37d, the passageway of the cooling air can be further increased to enhance the cooling effect. At the same time, the radial groove 45 can be used to further reduce the thickness of the flange portion 37, which can also contribute to the weight reduction of the mold portion 30.

[0048] [Item 5] On the second surface (33) of the mold portion (30), a connector mounting portion (37e) for mounting a connector (46) of three input electric wires (17) connected to the coil (14) is formed on the flange portion (37), and in the connector mounting portion (37e) of the flange portion (37) of the one protruding surface (37a) The stator structure of the outer rotor type rotating electric machine according to any one of items 1 to 4, wherein the ventilation groove (41) and the reinforcing rib (42) extending radially outward from the outer peripheral surface (31) of the mold portion (30) in the radial direction of the flange portion (37) are formed. According to this, since the connector mounting portion 37e for mounting the connector 46 of the three input electric wires 17 connected to the coil 14 is formed on the flange portion 37 on the second surface 33 of the mold portion 30, the number of parts and the assembly man-hours can be reduced, and the cost can be reduced. Moreover, in the connector attachment portion 37e in the flange portion 37, a ventilation groove 41 and a reinforcing rib 42 that extend radially outward from the outer peripheral surface of the mold portion 30 in the radial direction of the flange portion 37 are formed. Therefore, the cooling effect of the connector attachment portion 37e by the ventilation groove can be ensured, and the strength of the connector attachment portion 37e can also be ensured by the reinforcing rib between the ventilation grooves.

[0049] [Item 6] A stator structure of an outer rotor type rotating electric machine having a cylindrical stator core (11) in which salient poles (12) are projectingly provided at a plurality of locations in the circumferential direction of the outer periphery at intervals, and a coil (14) is wound around the salient poles (12) via an insulating bobbin (13), and a rotor (20) formed in a bottomed cylindrical shape surrounding the stator (10) coaxially, and a plurality of permanent magnets (22) are provided on the inner surface (21d) of a cylindrical portion (21) facing the outer end surface (12a) of the salient pole (12), and a central portion (23a) of a bottom plate portion (23) connected to one end (21a) of the cylindrical portion (21) is rotatably supported by the inner peripheral portion (15) of the stator core (11). The stator core (11) has three input electric wires (17) connected to the coil (14), and a part of the bobbin (13) and the coil (14) are molded with synthetic resin. The mold portion (30) of the stator core (11) has an outer peripheral surface (31) facing the inner surface (21d) of the cylindrical portion (21) of the rotor (20), a first surface (32) facing the bottom plate portion (23) of the rotor (20) in which an opening (23b) is formed, and a second surface (33) protruding axially outward from the other end (21b) of the cylindrical portion (21) of the rotor (20) on the opposite side of the first surface (32). In a portion of the outer peripheral surface (31) that protrudes axially outward from the other end (21b) of the cylindrical portion (21), a flange portion (37) is formed such that one protruding surface (37a) faces the tip surface (21c) of the other end (21b) of the cylindrical portion (21), and the other protruding surface (37b) is continuous with the second surface (33), and extends radially outward beyond the outer side surface (21e) of the cylindrical portion (21) of the rotor (20). On the radially outer end (37c) of the flange portion (37), an extension side wall (47) is formed that extends along the outer surface (21e) of the cylindrical portion (21) of the rotor (20) toward the first surface (32) side of the mold portion (30). A labyrinth passage is formed between the extension side wall (47) of the flange portion (37) and the outer surface (21e) of the cylindrical portion (21), between one protruding surface (37a) of the flange portion (37) and the front end surface (21c) of the other end (21b) of the cylindrical portion (21), and between the outer peripheral surface (31) of the mold portion (30) and the inner surface (21d) of the cylindrical portion (21). The stator structure of an outer rotor type rotating electrical machine is characterized by this. According to this, the flange portion 37 is formed so as to extend outward beyond the outer surface 31 of the cylindrical portion 21 of the rotor 20 in the radial direction. On the radially outer end 37c of the flange portion 37, an extension side wall 47 is formed that extends along the outer surface 31 of the cylindrical portion 21 of the rotor 20 toward the first surface side of the mold portion 30. A labyrinth passage is formed between the extension side wall 47 of the flange portion 37 and the outer surface 31 of the cylindrical portion 21, between one protruding surface 37a of the flange portion 37 and the front end surface 21c of the other end of the cylindrical portion 21, and between the outer peripheral surface 31 of the mold portion 30 and the inner surface 21d of the cylindrical portion 21. Therefore, not only can the flow of cooling air be ensured by this labyrinth passage, but the intrusion of flying debris from the outside can be reliably prevented, and the ingress of water into the rotating electrical machine can also be prevented.

[0050] [Item 7] The stator structure of the outer rotor type rotating electrical machine according to item 6, characterized in that notches (48) are formed in circumferential locations on the extension side wall (47) of the flange portion (37). According to this, notches 48 are formed in circumferential locations on the extension side wall 47 of the flange portion 37. Therefore, while forming a labyrinth passage by the extension side wall 47, a flow path for cooling air that cannot be ensured only by the labyrinth passage can be ensured by the notches 48 in the extension side wall 47.

[0051] [Item 8] In the stator structure of the outer rotor type rotating electric machine according to item 7, a ventilation groove (41) extending radially outward from the outer peripheral surface (31) of the mold part (30) to the notch (48) of the extension side wall (47) is formed in the one protruding surface (37a) of the flange part (37). According to this, a plurality of ventilation grooves (41) extending radially outward from the outer peripheral surface of the mold part (30) to the notch (48) of the extension side wall (47) are formed in one protruding surface (37a) of the flange part (37). Therefore, while forming a labyrinth passage by the extension side wall (47), a flow path for cooling air that cannot be ensured only by the labyrinth passage can be ensured by the notch (48) of the extension side wall (47) and the ventilation groove (41).

[0052] [Item 9] A rotating electric machine equipped with the stator structure of the outer rotor type rotating electric machine according to any one of items 1 to 8. According to this, it is possible to prevent foreign matter from entering the inside of the outer rotor type rotating electric machine, ensure a flow path for cooling air, and configure a rotating electric machine equipped with a stator structure capable of cooling the stator coil.

Explanation of symbols

[0053] 10 ···· Stator 11 ···· Stator core 12 ···· Pole 12a ··· Outer end face 13 ···· Bobbin 14 ···· Coil 15 ···· Inner peripheral part 17 ···· Input electric wire 20 ···· Rotor 21 ···· Cylindrical part 21a ··· One end 21b ··· The other end 21c ··· Tip face 21d ··· Inner side face 21e ··· Outer side face 22 ···· Permanent magnet 23 ···· Bottom plate part 23a ··· Central part 23b ··· Opening 30 ···· Mold part 31 ···· Outer peripheral surface 32 ···· First surface of the mold part 33 ···· Second surface of the mold part 37 ···· Flange part 37a ··· One protruding surface of the flange part 37b ··· The other protruding surface of the flange part 37c ··· Outer end 37d ··· Base end part 37e ··· Connector attachment part 41 ···· Ventilation groove 42 ···· Reinforcing rib 43 ···· Axial groove 44 ···· Through hole 45 ···· Radial groove 46 ···· Connector 47 ···· Extension side wall 48 ···· Notch

Claims

1. A stator structure of an outer-rotor type rotating electric machine having a cylindrical stator core with salient poles protruding at a plurality of circumferential locations on the outer periphery at intervals, and a stator in which coils are wound around the salient poles via insulating bobbins, and a bottomed cylindrical shape that coaxially surrounds the stator, and a plurality of permanent magnets are provided on the inner surface of the cylindrical portion facing the outer end surface of the salient pole, and a rotor in which the central portion of the bottom plate portion connected to one end of the cylindrical portion is rotatably supported by the inner peripheral portion of the stator core, The stator core is molded with synthetic resin for three input electric wires connected to the coil, the bobbin, and a part of the coil, The molded portion of the stator core has an outer peripheral surface facing the inner surface of the cylindrical portion of the rotor, a first surface facing the bottom plate portion of the rotor in which an opening is formed, and a second surface protruding axially outward from the other end of the cylindrical portion of the rotor on the opposite side of the first surface. A flange portion is formed on a portion of the outer peripheral surface that protrudes axially outward from the other end of the cylindrical portion, such that one protruding surface faces the tip end surface of the other end of the cylindrical portion and the other protruding surface is continuous with the second surface, and extends radially outward within a range not exceeding the outer surface of the cylindrical portion of the rotor in the radial direction. A plurality of ventilation grooves extending radially from the outer peripheral surface of the molded portion to the flange portion are formed on the one protruding surface of the flange portion, and a reinforcing rib is formed on a portion sandwiched between the plurality of ventilation grooves. Axial grooves are formed on the outer peripheral surface of the molded portion, which are disposed between the outer end surfaces of adjacent salient poles and extend from the first surface to the base end portion of the flange portion. The stator structure of the outer-rotor type rotating electric machine is characterized in that the axial groove is further formed on the surface of the plurality of ventilation grooves of the flange portion and is connected to a radial groove extending radially from the base end portion of the flange portion.

2. The stator structure of the outer-rotor type rotating electric machine according to claim 1, wherein the axial groove is formed at the base end portion of the flange portion and is connected to a through hole that communicates the one protruding surface and the other protruding surface of the flange portion.

3. On the second surface of the mold part, a connector mounting part for mounting connectors of three input electric wires connected to the coil is formed on the flange part, and on one protruding surface of the connector mounting part in the flange part, the ventilation groove and the reinforcing rib extending radially outward from the outer peripheral surface of the mold part to the outer side in the radial direction of the flange part are formed. The stator structure of the outer rotor type rotating electric machine according to claim 1 or 2, characterized in that.

4. A stator having a cylindrical stator core with salient poles projecting at intervals in a plurality of circumferential locations on the outer periphery, and a coil wound around the salient poles via an insulating bobbin, and a bottomed cylindrical shape formed coaxially around the stator. A plurality of permanent magnets are provided on the inner side surface of the cylindrical part facing the outer end surface of the salient pole, and the central part of the bottom plate part connected to one end of the cylindrical part is rotatably supported by the inner peripheral part of the stator core. A stator structure of an outer rotor type rotating electric machine having a rotor, The stator core is molded with synthetic resin for three input electric wires connected to the coil, the bobbin, and a part of the coil. The molded part of the stator core has an outer peripheral surface facing the inner side surface of the cylindrical part of the rotor, a first surface facing the bottom plate part of the rotor with an opening formed, and a second surface protruding axially outward from the other end of the cylindrical part of the rotor on the opposite side of the first surface. On a portion of the outer peripheral surface that protrudes axially outward from the other end of the cylindrical part, a flange part is formed such that one protruding surface faces the tip end surface of the other end of the cylindrical part and the other protruding surface is continuous with the second surface, and extends radially outward beyond the outer side surface of the cylindrical part of the rotor in the radial direction. An extension side wall extending along the outer side surface of the cylindrical part of the rotor to the first surface side of the molded part is formed at the radially outer end of the flange part, and a labyrinth passage is configured between the extension side wall of the flange part and the outer side surface of the cylindrical part, between the one protruding surface of the flange part and the tip end surface of the other end of the cylindrical part, and between the outer peripheral surface of the molded part and the inner side surface of the cylindrical part. Notches are formed at circumferential locations on the extension side wall of the flange part. A stator structure of an outer rotor type rotating electric machine, characterized in that a ventilation groove extending radially outward from the outer peripheral surface of the molded part to the notch of the extension side wall is formed on the one protruding surface of the flange part.

5. A stator structure of an outer-rotor type rotating electric machine, comprising a cylindrical stator core having salient poles projecting at intervals in a plurality of circumferential positions on the outer periphery, and coils wound around the salient poles via insulating bobbins, and a rotor formed in a bottomed cylindrical shape surrounding the stator coaxially, with a plurality of permanent magnets provided on an inner surface of a cylindrical portion facing an outer end surface of the salient pole, and a central portion of a bottom plate portion continuous with one end of the cylindrical portion being rotatably supported by an inner peripheral portion of the stator core. The stator core is molded with a synthetic resin for three input electric wires connected to the coils, as well as the bobbin and a part of the coils. The molded portion of the stator core has an outer peripheral surface facing the inner surface of the cylindrical portion of the rotor, a first surface facing the bottom plate portion of the rotor having a plurality of openings for ventilation, and a second surface protruding axially outward from the other end of the cylindrical portion of the rotor on the opposite side of the first surface. A flange portion is formed on a portion of the outer peripheral surface protruding axially outward from the other end of the cylindrical portion, with one protruding surface facing the front end surface of the other end of the cylindrical portion and the other protruding surface continuous with the second surface, extending radially outward within a range not exceeding the outer surface of the cylindrical portion of the rotor in the radial direction. Cooling air is configured to flow through the gap between the flange portion and the front end surface of the other end of the cylindrical portion, flow through the rotating electric machine, cool the coils of the stator, and escape through the openings in the bottom plate portion of the rotor. A plurality of ventilation grooves extending radially from the outer peripheral surface of the molded portion to the flange portion are formed on the one protruding surface of the flange portion, and a reinforcing rib is formed on a portion sandwiched between the plurality of ventilation grooves. A stator structure of an outer-rotor type rotating electric machine is characterized by this.

6. An axial groove extending from the first surface to the base end portion of the flange portion is formed on the outer peripheral surface of the molded portion, disposed between the outer end surfaces of adjacent salient poles. The stator structure of the outer-rotor type rotating electric machine according to claim 5 is characterized by this.

7. A stator structure of an outer rotor type rotating electric machine, comprising a cylindrical stator core having salient poles protruding at a plurality of circumferential positions on the outer periphery at intervals, and coils wound around the salient poles via insulating bobbins, and a rotor formed in a bottomed cylindrical shape surrounding the stator coaxially, and having a plurality of permanent magnets provided on the inner surface of a cylindrical portion facing the outer end surface of the salient pole, and a central portion of a bottom plate portion connected to one end of the cylindrical portion being rotatably supported by an inner peripheral portion of the stator core, The stator core is molded with a synthetic resin together with three input electric wires connected to the coils, the bobbins, and a part of the coils, The molded portion of the stator core has an outer peripheral surface facing the inner surface of the cylindrical portion of the rotor, a first surface facing the bottom plate portion of the rotor in which a plurality of openings for ventilation are formed, and a second surface protruding axially outward from the other end of the cylindrical portion of the rotor on the opposite side of the first surface. A flange portion is formed on a portion of the outer peripheral surface protruding axially outward from the other end of the cylindrical portion, with one protruding surface facing the tip surface of the other end of the cylindrical portion and the other protruding surface being continuous with the second surface, and the flange portion extends radially outward beyond the outer surface of the cylindrical portion of the rotor in the radial direction. An extension side wall extending along the outer surface of the cylindrical portion of the rotor toward the first surface side of the molded portion is formed at the radially outer end of the flange portion. A labyrinth passage is formed between the extension side wall of the flange portion and the outer surface of the cylindrical portion, between one protruding surface of the flange portion and the tip surface of the other end of the cylindrical portion, and between the outer peripheral surface of the molded portion and the inner surface of the cylindrical portion. Cooling air is configured to flow through the rotating electric machine from the gaps forming the labyrinth passage to cool the coils of the stator and escape from the openings in the bottom plate portion of the rotor. This is the stator structure of an outer rotor type rotating electric machine.

8. The stator structure of the outer rotor type rotating electric machine according to claim 7, characterized in that notches are formed at circumferential positions on the extension side wall of the flange portion.

9. A rotating electric machine equipped with the stator structure of the outer rotor type rotating electric machine according to any one of claims 1 to 8.

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