JP7337001B2 - Axial gap type rotary electric machine - Google Patents

Description

The present invention relates to an axial gap type rotating electric machine.

Axial gap type rotation in which the stator core, which has a coil wound directly around the iron core or through a bobbin, is arranged in a circle around the rotating shaft, and the space between the stator core and the housing is filled with mold resin to fix the stator core to the housing. In an electric machine, the stator core is electrically insulated by molding resin. Therefore, the potential of the stator core becomes a floating potential, and an axial voltage is generated by the capacitance stored between the stator core and the rotor. If this shaft voltage is higher than the dielectric breakdown voltage of the oil film of the bearing, electrolytic corrosion occurs in the bearing, which is one of the factors that shortens the life of the bearing. A technique for reducing this axial voltage is disclosed in Patent Document 1.

JP 2014-017915 A

Patent Literature 1 discloses an axial gap type electric rotating machine in which a stator is held by resin molding after a stator core and a housing are electrically connected by a plate-like conductive member. In this axial gap type rotating electric machine, the stator core is grounded to the housing by the plate-like conductive member, so that the potential of the stator core is suppressed from becoming a floating potential, and the generation of axial voltage can be prevented.

In this axial gap type electric rotating machine, if the surface of the resin mold facing the rotor can be coated with a conductive paint to electrically connect the stator core and the housing, the plate-like conductive member becomes unnecessary. A reduction in manufacturing costs can be expected. However, when the axial gap type electric rotating machine is used for a long period of time, a gap may occur between the resin mold and the housing. If conductive paint is used in place of the plate-like conductive member, there is a concern that the conductive paint will be cut along with the formation of the gap, and the stator core will be electrically insulated again.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an axial gap type electric rotating machine capable of preventing breakage of the conductive paint that electrically connects the stator core and the housing even after long-term use.

In order to achieve the above object, the present invention provides a plurality of stator cores in which coils are wound around an iron core, a stator in which the plurality of stator cores are arranged in an annular shape, and an air gap in the stator. a rotor facing each other via a rotor; a housing covering the stator; a mold resin filled between the stator and the housing; a conductive member provided in a predetermined area around the fitting portion on the surface of the mold resin facing the rotor and electrically connecting the iron core and the housing , wherein the housing is a heating element; a heat receiving portion that receives heat from the heat receiving portion, and the fitting portion is in each of two semi-cylindrical regions obtained by dividing the cylindrical portion of the housing by a plane passing through the central axis of the housing and the heat receiving portion They are provided so as to face each other across the central axis of the housing .

According to the present invention, it is possible to reduce the manufacturing cost of the axial gap type rotating electric machine and suppress the occurrence of electrolytic corrosion of the bearings even if the axial gap type rotating electric machine is used for a long period of time. Problems, configurations, and effects other than those described above will be clarified by the following description of the embodiments.

FIG. 3 is a cross-sectional perspective view of an axial gap type rotating electric machine according to a comparative example; FIG. 5 is a cross-sectional view of a housing and a stator of an axial gap type rotary electric machine according to a comparative example; FIG. 3 is a perspective view of a stator, a rotor, and a cylindrical portion of a housing of an axial gap type rotary electric machine according to a comparative example; FIG. 5 is a schematic diagram of a housing and a stator of an axial gap type rotary electric machine according to a comparative example, viewed from the axial direction of a shaft, before long-term use; FIG. 7 is a schematic diagram of a housing and a stator viewed from the axial direction of the shaft after long-term use of the axial gap type rotating electric machine according to the comparative example; FIG. 2 is a schematic diagram of the housing and stator of the axial gap type rotating electrical machine according to the first embodiment of the present invention, viewed from the axial direction of the shaft, before long-term use; 1 is an enlarged perspective view of a fitting portion of an axial gap type rotating electric machine according to a first embodiment of the present invention; FIG. FIG. 8 is a schematic diagram of the housing and stator of the axial gap type rotary electric machine according to the second embodiment of the present invention, viewed from the axial direction of the shaft, before long-term use; FIG. 11 is a schematic view of the housing and stator of the axial gap type rotating electric machine according to the third embodiment of the present invention before long-term use, as seen from the axial direction of the shaft; FIG. 11 is an enlarged perspective view of a fitting portion of an axial gap type rotating electrical machine according to a third embodiment of the present invention; FIG. 11 is an enlarged perspective view of a fitting portion of an axial gap type rotating electric machine according to a fourth embodiment of the present invention, in which (a) is a view before the projecting member is attached to the guide portion of the housing; It is a figure after attaching to the guide part of. FIG. 11 is a schematic view of a stator having a housing and a plate-shaped first insulating portion before long-term use of the axial gap type rotating electric machine according to the fifth embodiment of the present invention, viewed from the axial direction of the shaft; FIG. 11 is a schematic view of a stator having a housing and an annular first insulating portion before long-term use of the axial gap type rotary electric machine according to the fifth embodiment of the present invention, viewed from the axial direction of the shaft; FIG. 11 is a schematic diagram of the housing and stator of the axial gap type rotating electric machine according to the sixth embodiment of the present invention, viewed from the axial direction of the shaft, before long-term use; FIG. 11 is a schematic diagram of the housing and stator of the axial gap type rotating electrical machine according to the seventh embodiment of the present invention, viewed from the axial direction of the shaft, before long-term use; FIG. 20 is a schematic diagram of the housing and stator of the axial gap type rotary electric machine according to the eighth embodiment of the present invention, viewed from the axial direction of the shaft, before long-term use;

The configuration and operation of the axial gap type electric rotating machine according to the first to eighth embodiments of the present invention will be described below with reference to the drawings. In addition, in each figure, the same code|symbol shows the same part.

FIG. 1 is a cross-sectional perspective view of an axial gap type rotating electric machine according to a comparative example. As shown in FIG. 1, the axial gap type rotating electric machine 100 according to the comparative example is a double rotor type in which two rotors sandwich a stator.

An axial gap type rotary electric machine 100 includes a stator 2 , a rotor 3 , a shaft 4 , a housing 5 , bearings 6 , a front housing 7 and a back housing 8 .

The stator 2 is an armature in which a plurality of stator cores 21 are annularly arranged and fixed to the shaft 4 . The stator core 21 has an iron core 22 , a bobbin 23 and a coil 24 . The iron core 22 is a lump of iron in which soft magnetic thin plates such as electromagnetic steel plates are punched into a predetermined shape and laminated. The bobbin 23 is a cylindrical resin. Coil 24 is an electric wire that generates a magnetic field. An iron core 22 is inserted into the inner cylindrical portion of the bobbin 23 . A coil 24 is wound around the outer cylindrical portion of the bobbin 23 .

The rotor 3 has a plurality of fan-shaped magnets 31 and a disk-shaped base 32 . A plurality of fan-shaped magnets 31 are annularly fixed to the end face of the disk-shaped base 32 on the side of the stator 2 and face the stator 2 via an air gap. A shaft 4 is connected to the center of the base 32 . Therefore, the shaft 4 rotates together with the rotor 3 .

The shaft 4 is a rotating shaft that outputs power. Shaft 4 is supported by two bearings 6 . Two bearings 6 are provided in a front housing 7 and a back housing 8, respectively.

The housing 5 is a metal member having a cylindrical portion 51 covering the stator 2 . A front housing 7 and a back housing 8 are attached to the ends of the housing 5 .

FIG. 2 shows a cross-sectional view of the housing 5 and the stator 2 of the axial gap type rotary electric machine 100 according to the comparative example. As shown in FIG. 2, the cylindrical portion 51 of the housing 5 is provided with a guide portion 52 protruding in the inner diameter direction of the housing 5 . The stator 2 is arranged at a predetermined position within the housing 5 by the guide portion 52 . Between the stator 2 positioned in the housing 5 and the housing 5, a mold resin 9 is filled and solidified as shown in FIG. The stator 2 is thereby fixed to the housing 5 .

When AC power is supplied to the coil 24, the axial gap type rotary electric machine 100 configured in this way outputs rotational torque, and can be used as a motor. Further, the axial gap type rotary electric machine 100 can be used as a generator by outputting electricity when rotational power is supplied to the shaft 4 .

FIG. 3 is a perspective view of the stator 2, the rotor 3, and the cylindrical portion 51 of the housing 5 of the axial gap type rotary electric machine 100 according to the comparative example. In order to clarify the shape of the mold resin 9, the front side of the cylindrical portion 51 of the housing 5 is omitted. Further, the guide portion 52 is also omitted.

As shown in FIG. 3, the mold resin 9 is filled between the stator 2 and the housing 5 and solidified. Therefore, the stator 2 is fixed to the housing 5 by the molding resin 9 as described above. The end of the iron core 22 protrudes from the surface of the mold resin 9 facing the rotor 3 to form a protruding portion 221 . Thereby, the stator 2 has a plurality of protrusions 221 on the surface facing the rotor 3 .

FIG. 4 is a schematic diagram of the housing 5 and the stator 2 seen from the axial direction of the shaft 4 before the axial gap type rotating electric machine 100 according to the comparative example is used for a long period of time.

As shown in FIG. 4 , the mold resin 9 has a plurality of projections 221 and one shaft center hole 25 on the surface facing the rotor 3 . A conductive member 10 is provided on the surface of the mold resin 9 and the guide portion 52 facing the rotor 3 .

The conductive member 10 provided on the surface of the mold resin 9 is in contact with the sidewall 222 of the projecting portion 221 . Thereby, the housing 5 having the guide portion 52 and the iron core 22 are electrically connected by the conductive member 10 .

It should be noted that the conductive member 10 is preferably made of conductive paint. As a result, the conductive member 10 can be provided by a simple process of coating the surfaces of the mold resin 9 and the guide portion 52 with a conductive paint, thereby reducing the manufacturing cost.

For the base material of the conductive paint, for example, epoxy resin, acrylic resin, urethane resin, polyester resin, silicone resin, etc. are used singly or in combination. In addition, the conductive particles of the conductive paint may be any substance having conductivity, and examples thereof include silver, copper, gold, nickel, aluminum, carbon, etc. Silver and copper, which have low electrical resistance, are particularly preferred. . Also, the conductive member 10 may be made of a material in which paste-like conductive particles are melted and then solidified.

Moreover, it is preferable that the conductive member 10 is a non-magnetic material. By providing the non-magnetic conductive member 10 on the surface of the mold resin 9 facing the rotor 3, the conductive member 10 shields ( shield). Thereby, the voltage applied to the bearing 6 is reduced. Therefore, electrolytic corrosion of the bearing 6 is suppressed. Therefore, it is preferable to provide the non-magnetic conductive member 10 on the entire surface of the mold resin 9 facing the rotor 3 .

On the other hand, the conductive member 10 is not provided on the surface of the projecting portion 221 facing the rotor 3 . As a result, the rotating magnetic force emitted from the coil 24 passes through the iron core 22 from one end face to the other end face without being shielded by the conductive member 10 , and rotates the rotor 3 . This can prevent the motor efficiency of the axial gap type rotary electric machine 100 from decreasing.

When the conductive member 10 is provided around each of the plurality of projections 221 , eddy currents 101 (the direction of the arrow is an example) circulate around the projections 221 . In addition, the conductive material extends from the edge 251 of the axial hole 25 toward the housing 5 and passes between two protrusions 221 adjacent in the circumferential direction of the stator 2 among the plurality of protrusions 221 . An eddy current 102 (the direction of the arrow is an example) circulates around the member 10 .

A cylindrical portion 51 of the housing 5 is provided with an opening 53 for drawing out a connecting wire (not shown) that connects to the coil 24 . A terminal block 54 is provided outside the cylindrical portion 51 in which the lead opening 53 is provided. The terminal block 54 is electrically connected to a connecting wire (not shown) drawn out from the outlet opening 53 and an electric wire (not shown) electrically connected to a power supply.

A terminal box 55 covering the terminal block 54 is attached to the cylindrical portion 51 provided with the terminal block 54 . A terminal block 54 electrically connected to a power source generates heat. Therefore, the cylindrical portion 51 has a heat receiving portion 56 that receives heat generated from the terminal block 54 .

FIG. 5 is a schematic diagram of the housing 5 and the stator 2 viewed from the axial direction of the shaft 4 after the axial gap type rotating electric machine 100 according to the comparative example has been used for a long period of time. A difference from the stator 2 before long-term use of the axial gap type rotating electric machine 100 according to the comparative example is that a gap 11 is provided between the guide portion 52 and the mold resin 9 .

The gap 11 is a space formed by the mold resin 9 contacting the inner peripheral wall of the guide portion 52 of the housing 5 being separated from the inner peripheral wall of the guide portion 52 . When the axial gap type rotating electric machine 100 is used for a long period of time, the mold resin 9 may shrink due to aged deterioration or the like. In this case, the mold resin 9 in contact with the inner peripheral wall of the guide portion 52 leaves the guide portion 52 . A gap 11 is formed between the inner peripheral wall of the guide portion 52 and the mold resin 9 . In particular, the inventors found that the width of the gap 11 in the radial direction with respect to the center O of the housing 5 is larger in the heat receiving portion 56 and in the facing portion 57 facing the heat receiving portion 56 with the center O of the housing 5 interposed therebetween. I have found that there is a trend. In addition, the inventors have found that when the direction in which the terminal block 54, which is a heating element, is positioned with respect to the center O of the housing 5 is the 12 o'clock direction, the mold resin 9 located in the 3 o'clock and 9 o'clock directions. It was found that the amount of shrinkage tends to be smaller than the amount of shrinkage of the mold resin 9 positioned in other directions.

When the gap 11 is formed, the guide portion 52 and the conductive member 10 provided on the surface of the mold resin 9 are cut. Thereby, the housing 5 and the iron core 22 are electrically disconnected. Therefore, the stator 2 is electrically insulated by the molding resin 9 . Therefore, the potential of the stator core 21 becomes a floating potential, and electrolytic corrosion occurs in the bearing 6 .

Therefore, the present invention provides a structure in which the mold resin 9 in contact with the inner peripheral wall of the guide portion 52 does not move away from the inner peripheral wall of the guide portion 52 even if the mold resin 9 tries to shrink in the radial direction of the stator 2 due to deterioration over time. , the conductive member 10 provided on the surface of the mold resin 9 and the guide portion 52 facing the rotor 3 is prevented from being cut.

(First embodiment)
FIG. 6 is a schematic diagram of the housing 5 and the stator 2 seen from the axial direction of the shaft 4 before the axial gap type rotary electric machine 1 according to the first embodiment of the present invention is used for a long period of time. A difference from the axial gap type rotary electric machine 100 according to the comparative example is that the guide portion 52 is provided with a fitting portion 521, and the guide portion 52 and the surface of the mold resin 9 facing the rotor 3 are centered on the fitting portion 521. The only difference is that the conductive member 10 is provided in a predetermined area 12 where the contact area 12 is formed.

FIG. 7 shows an enlarged perspective view of the fitting portion 521 of the axial gap type rotating electric machine 1 according to the first embodiment of the present invention. As shown in FIG. 7 , the fitting portion 521 is a concave portion recessed from the inner peripheral wall 522 of the guide portion 52 in the outer diameter direction of the cylindrical portion 51 . The fitting portion 521 has a portion where the width of the clearance of the fitting portion 521 in the circumferential direction of the cylindrical portion 51 is wider on the outer diameter side than on the inner diameter side. Accordingly, the fitting portion 521 has a constricted portion. Even if the mold resin 9 filled and solidified in the fitting portion 521 shrinks in the radial direction of the stator 2 due to deterioration over time, etc., and a force acts away from the inner peripheral wall of the guide portion 52, the constricted shape of the fitting portion 521 is formed. portion, and separation from the inner peripheral wall of the guide portion 52 is suppressed.

A predetermined region 12 shown in FIG. 6 prevents the mold resin 9 that is in contact with the inner peripheral wall of the guide portion 52 from leaving the inner peripheral wall of the guide portion 52 due to the solidified mold resin 9 filled in the fitting portion 521 . It is an area where Therefore, by providing the conductive member 10 in the predetermined region 12, the electrical connection between the iron core 22 and the housing 5 of the axial gap type rotary electric machine 1 used for a long period of time is maintained. As a result, electrolytic corrosion of the bearing 6 is continuously suppressed, and the axial gap type rotary electric machine 1 with high reliability against electrolytic corrosion of the bearing can be provided.

Note that the range of the predetermined area 12 varies depending on the shape of the fitting portion 521 and the material of the mold resin 9 . Moreover, the conductive member 10 is preferably provided over the entire predetermined area 12 , but may be provided in a part of the predetermined area 12 including the joint portion between the guide portion 52 and the mold resin 9 .

As in the comparative example, the radial width of the gap 11 with respect to the center O of the housing 5 tends to be larger at the heat receiving portion 56 and the facing portion 57 than at other portions. Therefore, in the region where the fitting portion 521 is provided, the cylindrical portion 51 is divided by a line segment AB passing through the center O of the housing 5 and the heat receiving portion 56 (a plane passing through the central axis of the housing 5 and the heat receiving portion 56). is preferably at least one (in this embodiment, one as shown in FIG. 6) of the two semi-cylindrical regions CD obtained in . Accordingly, the fitting portion 521 is provided to avoid the heat receiving portion 56 and the facing portion 57 where the width of the gap 11 in the radial direction with respect to the rotation axis tends to be larger than other portions. As a result, the force applied to the fitting portion 521 due to shrinkage of the mold resin 9 in the radial direction of the stator 2 is suppressed. Therefore, even if the axial gap type rotary electric machine 1 is used for a long period of time, the electrical connection between the iron core 22 and the housing 5 can be maintained, and the reliability against electrolytic corrosion of the bearing can be improved.

As described above, the axial gap type rotary electric machine 1 according to the first embodiment of the present invention includes a plurality of stator cores 21 in which the coils 24 are wound around the iron core 22, and the plurality of stator cores 21 arranged in an annular shape. A stator 2, a rotor 3 facing the stator 2 via an air gap, a housing 5 covering the stator 2, a mold resin 9 filled between the stator 2 and the housing 5, and the housing 5. A fitting portion 521 which is provided and fitted with the mold resin 9 is provided in a predetermined region 12 of the surface of the mold resin 9 facing the rotor 3 centering on the fitting portion 521, and the iron core 22 and the housing 5 are electrically connected. and a conductive member 10 that is electrically connected.

In the axial gap type rotating electrical machine 1 configured as described above, the mold resin 9 is fitted to the fitting portion 521 of the housing 5. Therefore, even if the mold resin 9 shrinks due to deterioration over time, the mold resin 9 remains in the housing. 5 can be deterred. Therefore, the conductive member 10 provided in the predetermined area 12 centered on the fitting portion 521 on the surface of the mold resin 9 facing the rotor 3 is located on the portion provided on the housing 5 and on the mold resin 9. The electrical connection between the iron core 22 and the housing 5 can be maintained without being cut at the provided portion. Therefore, even if the axial gap type rotary electric machine 1 is used for a long period of time, the conductive member 10 grounds the stator core 21 to the housing 5 to suppress the potential of the stator core 21 from becoming a floating potential. The occurrence of electrolytic corrosion in 6 can be suppressed. In addition, since the conductive member 10 is provided on the surface of the mold resin 9 facing the rotor 3, the processing is easy and the manufacturing cost can be reduced.

Further, in the stator 2 of the axial gap type rotating electrical machine 1 according to the first embodiment of the present invention, the iron core 22 has a protruding portion 221 protruding from the mold resin 9, and the protruding portion 221 has a side wall 222 that is electrically conductive. It is electrically connected to the member 10, and the protruding portion 221 does not have the conductive member 10 on the end face (the end face of the iron core 22). Therefore, the magnetic force emitted from the end face of the iron core 22 to the rotor 3 is not shielded. Therefore, a decrease in motor efficiency can be prevented. Moreover, the electrical connection between the iron core 22 and the housing 5 can be facilitated, and the manufacturing cost can be suppressed.

Further, the housing 5 of the axial gap type rotary electric machine 1 according to the first embodiment of the present invention has a heat receiving portion 56 that receives heat from the heating element (the terminal block 54). It is provided in at least one of two semi-cylindrical regions CD obtained by dividing the cylindrical portion 51 of the housing 5 by a plane passing through the central axis and the heat receiving portion 56 . As a result, the fitting portion 521 is provided avoiding the portion (the heat receiving portion 56 and the facing portion 57) where the amount of shrinkage of the mold resin 9 tends to be larger than that of other portions, and the mold resin 9 is separated from the housing 5. can be further prevented. Therefore, the axial gap type rotary electric machine 1 according to the present embodiment can further improve reliability against electrolytic corrosion of the bearings.

Further, the fitting portion 521 of the axial gap type rotary electric machine 1 according to the first embodiment of the present invention has a concave portion having a constricted portion. Therefore, the fitting portion 521 can be easily processed, and the manufacturing cost can be suppressed.

(Second embodiment)
FIG. 8 is a schematic diagram of the housing and stator of the axial gap type rotary electric machine 20 according to the second embodiment of the present invention, viewed from the axial direction of the shaft, before long-term use. The difference from the axial gap type rotary electric machine 1 according to the first embodiment is that, as shown in FIG. 5) are provided so as to face each other.

As a result, even if the mold resin 9 tries to shrink in the radial direction of the stator 2 due to deterioration over time or the like, the stator 2 is pulled by each of the fitting portions 521 facing each other across the central axis of the housing 5, and the stator 2 is pulled. 2 can be restrained from moving radially with respect to the central axis of the housing 5 .

Further, as described above, the inventors found that when the direction in which the terminal block 54, which is a heating element, is positioned with respect to the center O of the housing 5 as the 12 o'clock direction, the 3 o'clock position with respect to the center O of the housing 5 It was found that the amount of contraction of the mold resin 9 located in the 9 o'clock direction tends to be smaller than the amount of contraction of the mold resin 9 located in the other directions. Therefore, as shown in FIG. 8, when the direction in which the terminal block 54, which is a heating element, is positioned with respect to the center O of the housing 5 is the 12 o'clock direction, the axial gap according to the second embodiment of the present invention is The fitting portions 521 of the type rotating electric machine 20 are positioned in the 3 o'clock and 9 o'clock directions with respect to the center O of the housing 5 . As a result, the width of contraction of the mold resin 9 in the inner diameter direction of the stator 2 is narrow, and the force applied to the fitting portion 521 can be suppressed. As a result, the axial gap type rotary electric machine 20 can maintain the electrical connection between the iron core 22 and the housing 5 even after long-term use, and the reliability against electrolytic corrosion of the bearing can be further improved.

(Third embodiment)
FIG. 9 is a schematic diagram of the housing 5 and the stator 2 seen from the axial direction of the shaft 4 before using the axial gap type rotary electric machine 30 according to the third embodiment of the present invention for a long period of time. A different point from the axial gap type rotary electric machine 20 according to the second embodiment is the shape of the fitting portion 521 .

FIG. 10 is an enlarged perspective view of the fitting portion 521 of the axial gap type rotary electric machine 30 according to the third embodiment of the invention. As shown in FIG. 10 , the fitting portion 521 is a convex portion protruding in the inner diameter direction of the cylindrical portion 51 from the inner peripheral wall 522 of the guide portion 52 . In addition, the fitting portion 521 has a portion where the width of the convex portion in the circumferential direction of the cylindrical portion 51 is narrower on the outer diameter side than on the inner diameter side. Accordingly, the fitting portion 521 has a constricted portion.

Even if the mold resin 9 filled and solidified around the fitting portion 521 shrinks in the inner diameter direction of the stator 2 due to aged deterioration etc. and tries to separate from the inner peripheral wall 522 of the guide portion 52, the constriction shape of the fitting portion 521 will not occur. and is prevented from separating from the inner peripheral wall 522 of the guide portion 52 . Therefore, by providing the conductive member 10 in a predetermined area 12 around the mating portion 521 of the surfaces of the housing 5 and the mold resin 9 facing the rotor 3, the axial gap type rotating electric machine 30 can be used for a long period of time. However, the electrical connection between the iron core 22 and the housing 5 can be maintained. As a result, the axial gap type rotary electric machine 30 can suppress the occurrence of electrolytic corrosion of the bearings 6 even when used for a long period of time.

Further, the fitting portion 521 of the second embodiment is a recess recessed from the inner peripheral wall 522 of the guide portion 52 in the outer diameter direction of the cylindrical portion 51 . Therefore, the mold resin 9 of the second embodiment is filled between the stator 2 and the housing 5 and in the recesses of the fitting portion 521 . On the other hand, the fitting portion 521 of the present embodiment is a protrusion projecting from the inner peripheral wall 522 of the guide portion 52 in the inner diameter direction of the cylindrical portion 51 . Therefore, the mold resin 9 of the present embodiment is filled between the stator 2 and the housing 5 excluding the protrusions of the fitting portion 521 . Therefore, the mold resin 9 of this embodiment has a smaller volume than the mold resin 9 of the second embodiment. As a result, the present embodiment can use less mold resin 9 than the second embodiment.

In the conductive member 10 of the second embodiment, the surface facing the rotor 3 of the mold resin 9 surrounded by the guide portion 52 and the fitting portion 521 on the surface of the guide portion 52 facing the rotor 3 is provided in a predetermined area 12 centered on . On the other hand, the conductive member 10 of the present embodiment is provided on the surface of the mold resin 9 surrounded by the guide portion 52 and on the surface of the fitting portion 521 facing the rotor 3. A region 12 is also provided. Therefore, the conductive member 10 of this embodiment has a smaller area than the conductive member 10 of the second embodiment. Thereby, the present embodiment can reduce the amount of the conductive member 10 used compared to the second embodiment, and can reduce the manufacturing cost compared to the second embodiment.

As described above, the fitting portion 521 of the axial gap type rotary electric machine 30 according to the third embodiment of the present invention has a convex portion having a constricted portion. Therefore, even if the mold resin 9 filled and solidified around the fitting portion 521 shrinks in the radial direction of the stator 2 due to aged deterioration or the like and tries to separate from the inner peripheral wall of the guide portion 52, the constricted shape of the fitting portion 521 does not occur. , and is prevented from separating from the inner peripheral wall of the guide portion 52 . In addition, the amounts of the molding resin 9 and the conductive member 10 used are smaller than those of the second embodiment, so that the manufacturing cost can be reduced.

Note that FIG. 9 shows an embodiment in which the fitting portions 521 are provided so as to face both of the two semi-cylindrical regions CD with the center O of the housing 5 (the central axis of the housing 5) interposed therebetween. Ta. However, it is not limited to this embodiment, and at least one fitting portion 521 may be provided. In addition, in the area where the fitting portion 521 is provided, the cylindrical portion 51 is divided by a line segment AB passing through the center O of the housing 5 and the heat receiving portion 56 (a plane passing through the central axis of the housing 5 and the heat receiving portion 56). is preferably at least one (in this embodiment, one as shown in FIG. 6) of the two semi-cylindrical regions CD obtained in .

(Fourth embodiment)
FIG. 11 is an enlarged perspective view of a fitting portion 521 of an axial gap type rotating electric machine according to a fourth embodiment of the present invention, and FIG. , (b) is a view after the projecting member 523 is attached to the guide portion 52 of the housing 5. FIG. A different point from the axial gap type rotary electric machine 30 according to the third embodiment is that the fitting portion 521 is formed by a convex member 523 attached to the guide portion 52 .

As shown in FIG. 11( a ), the projecting member 523 has a first projecting portion 524 and a second projecting portion 525 , and the guide portion 52 has a recessed portion 526 .

The first convex portion 524 has a portion where the width in the circumferential direction of the cylindrical portion 51 is narrower on the outer diameter side than on the inner diameter side when the convex member 523 is attached to the guide portion 52 . Thereby, the first protrusion 524 has a constricted portion. Therefore, even if the mold resin 9 filled and solidified around the fitting portion 521 shrinks in the radial direction of the stator 2 due to aged deterioration or the like and tries to separate from the inner peripheral wall 522 of the guide portion 52, the fitting portion 521 is constricted. It is restrained from separating from the inner peripheral wall 522 of the guide portion 52 by fitting into the shaped portion.

The second convex portion 525 is a portion that is attached to the guide portion 52 and fixes the convex member 523 to the guide portion 52 . A concave portion 526 is formed in the guide portion 52 and is a portion for fixing the convex member 523 . Therefore, the second convex portion 525 and the concave portion 526 are fitted to each other, and the second convex portion 525 has a shape that does not come off from the concave portion 526 in the inner diameter direction of the cylindrical portion 51 .

Specifically, as shown in FIG. 11A, the recessed portion 526 is a groove recessed in the inner peripheral wall 522 of the guide portion 52 in the outer diameter direction of the cylindrical portion 51, and the groove width in the circumferential direction of the cylindrical portion 51 is the inner diameter. It has a shape with a portion that is wider on the outer diameter side than on the side. On the other hand, the second convex portion 525 has a columnar shape having the same thickness as that of the guide portion 52 in a planar shape obtained by projecting the concave portion 526 in the rotation axis direction. As a result, the second protrusion 525 can be inserted into the recess 526 from the rotation axis direction and cannot be pulled out in the inner diameter direction of the cylindrical portion 51 .

Even if the mold resin 9 filled and solidified around the first protrusions 524 of the protrusion member 523 shrinks in the inner diameter direction of the stator 2 due to aged deterioration, etc., and the first protrusions 524 are separated from the guide portions 52 , Since the two convex portions 525 are inserted into the concave portions 526, separation from the guide portion 52 is suppressed. Therefore, by providing the conductive member 10 in a predetermined area 12 around the mating portion 521 of the surfaces of the housing 5 and the mold resin 9 facing the rotor 3, the axial gap type rotating electric machine 30 can be used for a long period of time. However, the electrical connection between the iron core 22 and the housing 5 can be maintained. Therefore, the axial gap type rotary electric machine 30 can suppress the occurrence of electrolytic corrosion of the bearings 6 even after long-term use.

Further, the axial gap type rotating electric machine according to the fourth embodiment is similar to the axial gap type rotating electric machine 30 according to the third embodiment. ) is made of a material different from the housing 5 . Therefore, there is no need for a complicated process of forming the convex portion on the guide portion 52, and the processing cost can be reduced.

Note that the axial gap type rotating electric machine 40 according to the present embodiment may be provided with at least one fitting portion 521 as in the third embodiment. In addition, in the area where the fitting portion 521 is provided, the cylindrical portion 51 is divided by a line segment AB passing through the center O of the housing 5 and the heat receiving portion 56 (a plane passing through the central axis of the housing 5 and the heat receiving portion 56). is preferably at least one of the two semi-cylindrical regions CD obtained by

(Fifth embodiment)
FIG. 12 shows the housing 5 and the stator 2 having the plate-shaped first insulating portion before the axial gap type rotating electric machine 50 according to the fifth embodiment of the present invention is used for a long period of time, as seen from the axial direction of the shaft 4. It is a schematic diagram.

The difference from the axial gap type electric rotating machine 1 according to the first embodiment is that, as shown in FIG. It is a point.

The plate-like first insulating portion protrudes from the surface of the mold resin 9 on which the conductive member 10 is provided, and has a plate-like shape in contact with the side wall 222 provided on one of the plurality of projecting portions 221 and the edge 251 of the shaft center hole 25. is the mold resin 9. The conductive member 10 is not provided on the first insulating portion 91 . Therefore, the eddy current 101 circulating around the projecting portion 221 is insulated by the first insulating portion 91 . Therefore, the first insulating portion 91 can prevent eddy currents from circulating around the projecting portion 221 .

Moreover, the first insulating portion 91 may be in contact with the side wall 222 of the projecting portion 221 and the edge 251 of the axial hole 25. As shown in FIG. It may be an annular mold resin 9 in contact with the edge 251 of the hole 25 . The annular first insulating portion 91 can improve the strength, and the shape of the mold is simple, so that the manufacturing cost can be reduced. Furthermore, in the step of providing the conductive member 10 on the surface of the mold resin 9, it is possible to easily prevent the conductive member 10 from leaking into the axial hole 25. FIG.

That is, the stator 2 of the axial gap type rotary electric machine 50 according to this embodiment has the shaft center hole 25 in which the rotating shaft O is arranged, and the first insulating portion 91 that insulates the conductive member 10 . The insulating portion 91 contacts the side wall 222 of the protruding portion 221 and the edge 251 of the axial hole 25 . As a result, the eddy current 101 circulating around the protruding portion 221 is insulated by the first insulating portion 91 contacting the side wall 222 of the protruding portion 221 and the edge 251 of the axial hole 25 . Therefore, it is possible to prevent the eddy current 101 from circulating around the projecting portion 221 . This reduces eddy current loss and improves motor efficiency.

Further, as described above, the first insulating portion 91 of the axial gap type rotating electric machine 50 according to the present embodiment is formed of the mold resin 9 protruding from the surface of the mold resin 9 on which the conductive member 10 is provided. Therefore, the eddy current 101 circulating around the projecting portion 221 is reliably insulated. Moreover, in the process of filling the mold resin 9 between the stator 2 and the housing 5, the first insulating portion 91 can be easily produced, and the processing cost can be suppressed.

Although an example in which the first insulating portion 91 is provided by protruding the mold resin 9 from the surface of the mold resin 9 on which the conductive member 10 is provided has been described, the present invention is not limited to this. For example, the conductive member 10 of conductive paint may be applied to the surface of the stator 2 facing the rotor 3 using a template, and the portion not coated with the conductive member 10 may be the first insulating portion 91 . Alternatively, a seal-like conductive member 10 may be attached to the surface of the mold resin 9 , and the portion to which the conductive member 10 is not attached may be used as the first insulating portion 91 .

12 or 13, the axial gap type rotary electric machine 50 according to this embodiment has the same fitting portion 521 as that of the first embodiment. However, the axial gap type rotary electric machine 50 only needs to have at least one fitting portion 521, and is not limited to this embodiment. That is, the axial gap type rotary electric machine 50 may have any one of the fitting portions 521 of the second to fourth embodiments.

(Sixth embodiment)
FIG. 14 is a schematic diagram of the housing 5 and the stator 2 seen from the axial direction of the shaft 4 before the axial gap type rotary electric machine 60 according to the sixth embodiment of the present invention is used for a long period of time.

The difference from the axial gap type rotary electric machine 1 according to the first embodiment is that, as shown in FIG. 14, a plurality of second insulating portions 92 are provided on the surface of the stator 2 facing the rotor 3. be.

The second insulating portion 92 protrudes from the surface of the mold resin 9 on which the conductive member 10 is provided, is in contact with the edge 251 of the axial hole 25, and is adjacent to the stator 2 among the plurality of projecting portions 221 in the outer diameter direction. A plate-shaped molding resin 9 is provided so as to extend along the opposing side surfaces of two projecting portions 221 and be positioned between two adjacent projecting portions 221 . Since the second insulating portion 92 does not include the conductive member 10 , the eddy current 102 that circulates between the two projecting portions 221 that are adjacent to each other in the radial direction of the stator 2 can be insulated.

That is, the stator 2 of the axial gap type rotary electric machine 60 according to the present embodiment includes a plurality of protrusions 221 in which the iron core 22 protrudes from the mold resin 9, an axial center hole 25 in which the rotating shaft O is arranged, and an electrically conductive Each of the plurality of second insulation portions 92 is in contact with the edge 251 of the shaft center hole 25 and extends from the stator 2 among the plurality of projections 221 . It is provided so as to be positioned between two protrusions 221 adjacent in the circumferential direction. Therefore, the eddy current 102 circulating between the two adjacent projecting portions 221 is insulated by the second insulating portion 92 . Therefore, the axial gap type rotary electric machine 60 according to the present embodiment can reduce eddy current loss and improve motor efficiency.

In this embodiment, the example in which the second insulating portion 92 extends along the opposing side surfaces of the two projecting portions 221 adjacent to each other in the radial direction of the stator 2 is shown. However, the second insulating portion 92 may be provided between two adjacent protrusions 221 of the plurality of protrusions 221 in the circumferential direction of the stator 2 . That is, the second insulating portion 92 may extend between the two adjacent projecting portions 221 in the radial direction of the stator 2 without along the opposing side surfaces of the two adjacent projecting portions 221 .

Further, the second insulating portion 92 of the axial gap type rotating electrical machine 60 according to the present embodiment is formed of the mold resin 9 projecting from the surface of the mold resin 9 on which the conductive member 10 is provided. Therefore, the eddy current 102 that circulates between two adjacent projections 221 is reliably insulated. Moreover, in the step of filling the space between the stator 2 and the housing 5 with the mold resin 9, the second insulating portion 92 can be easily produced, and the processing cost can be suppressed.

Although an example in which the second insulating portion 92 is provided by protruding the mold resin 9 from the surface of the mold resin 9 on which the conductive member 10 is provided has been described, the present invention is not limited to this. For example, the conductive member 10 of conductive paint may be applied to the surface of the stator 2 facing the rotor 3 using a template, and the portion not coated with the conductive member 10 may be the second insulating portion 92 . Alternatively, a seal-like conductive member 10 may be attached to the surface of the mold resin 9 , and a portion to which the conductive member 10 is not attached may be used as the second insulating portion 92 .

Further, as shown in FIG. 14, the axial gap type rotary electric machine 60 according to this embodiment has the same fitting portion 521 as in the first embodiment. However, the axial gap type rotary electric machine 60 only needs to have at least one fitting portion 521, and is not limited to this embodiment. That is, the axial gap type rotary electric machine 60 may have any one of the fitting portions 521 of the second to fourth embodiments.

(Seventh embodiment)
FIG. 15 is a schematic diagram of the housing 5 and the stator 2 seen from the axial direction of the shaft 4 before the axial gap type rotary electric machine 70 according to the seventh embodiment of the present invention is used for a long period of time.

The difference from the axial gap type electric rotating machine 1 according to the first embodiment is that, as shown in FIG. The point is that it has 92.

The first insulating portion 91 is an annular mold resin 9 that protrudes from the surface of the mold resin 9 on which the conductive member 10 is provided and is in contact with the side walls 222 provided on each of the plurality of projecting portions 221 and the edge 251 of the axial hole 25 . .

The plurality of second insulating portions 92 are coupled to the first insulating portion 91 and extend along the opposing side surfaces of two of the plurality of projecting portions 221 adjacent to each other in the radial direction of the stator 2, Mold resin 9 is provided so as to be positioned between two adjacent protrusions 221 .

The conductive member 10 is not provided on the first insulating portion 91 and the plurality of second insulating portions 92 . Therefore, the eddy current 101 circulating around the protruding portion 221 is insulated by the first insulating portion 91, and the eddy current 102 circulating between the two protruding portions 221 adjacent to each other in the outer diameter direction of the stator 2 is isolated from the first insulating portion 91. It is insulated by the insulating portion 91 and the second insulating portion 92 . Therefore, eddy current loss can be suppressed, and motor efficiency can be improved.

That is, the stator 2 of the axial gap type rotary electric machine 70 according to the present embodiment includes a plurality of protrusions 221 in which the iron core 22 protrudes from the mold resin 9, an axial center hole 25 in which the rotating shaft O is arranged, and an electrically conductive a first insulating portion 91 for insulating the member 10 and a plurality of second insulating portions 92, the first insulating portion 91 being in contact with the sidewalls 222 of each of the plurality of projections 221 and the edge 251 of the axial hole 25; Each of the plurality of second insulating portions 92 is coupled to the first insulating portion 91 and provided so as to be positioned between two of the plurality of projecting portions 221 adjacent to each other in the circumferential direction of the stator 2 . It is

The axial gap type rotary electric machine 70 according to the present embodiment configured as described above has the eddy current 101 that circulates around the projecting portion 221 and the current between the two projecting portions 221 that are adjacent to each other in the outer diameter direction of the stator 2 . can be insulated from the eddy current 102 that circulates at the same time. Therefore, the axial gap type rotary electric machine 70 according to the present embodiment can further reduce eddy current loss and further improve motor efficiency.

Moreover, since the plurality of second insulation portions 92 are coupled to the first insulation portion 91, the strength of the first insulation portion 91 and the plurality of second insulation portions 92 can be improved. Further, the first insulating portion 91 is an annular mold resin 9 that protrudes from the surface of the mold resin 9 on which the conductive member 10 is provided and is in contact with the edge 251 of the axial hole 25, and is provided on the surface of the mold resin 9. It prevents the conductive member 10 from contacting the edge 251 of the axial hole 25 . Therefore, in the step of providing the conductive member 10 on the surface of the mold resin 9 , it is possible to easily prevent the conductive member 10 from leaking into the axial hole 25 .

In this embodiment, the example in which the second insulating portion 92 extends along the opposing side surfaces of the two projecting portions 221 adjacent to each other in the radial direction of the stator 2 is shown. However, the second insulating portion 92 may be provided between two adjacent protrusions 221 of the plurality of protrusions 221 in the circumferential direction of the stator 2 . That is, the second insulating portion 92 may extend between the two adjacent projecting portions 221 in the radial direction of the stator 2 without along the opposing side surfaces of the two adjacent projecting portions 221 .

Although this embodiment shows an example in which the first insulating portion 91 and the second insulating portion 92 are provided by projecting the mold resin 9 from the surface of the mold resin 9 on which the conductive member 10 is provided, the present invention is not limited to this. For example, the conductive member 10 of conductive paint is applied to the surface of the stator 2 facing the rotor 3 using a template, and the portion not coated with the conductive member 10 is divided into the first insulating portion 91 and the second insulating portion. 92 may be used. Alternatively, the seal-like conductive member 10 may be attached to the surface of the mold resin 9 and the portions to which the conductive member 10 is not attached may be the first insulating portion 91 and the second insulating portion 92 .

Further, as shown in FIG. 15, the axial gap type rotating electric machine 70 according to this embodiment has the same fitting portion 521 as that of the first embodiment. However, the axial gap type rotary electric machine 70 only needs to have at least one fitting portion 521, and is not limited to this embodiment. That is, the axial gap type rotary electric machine 70 may have any one of the fitting portions 521 of the second to fourth embodiments.

That is, the stator 2 of the axial gap type rotary electric machine 70 according to the present embodiment includes a plurality of protrusions 221 in which the iron core 22 protrudes from the mold resin 9, an axial center hole 25 in which the rotating shaft O is arranged, and an electrically conductive a first insulating portion 91 for insulating the member 10 and a plurality of second insulating portions 92, the first insulating portion 91 being in contact with the sidewalls 222 of each of the plurality of projections 221 and the edge 251 of the axial hole 25; Each of the plurality of second insulating portions 92 is coupled to the first insulating portion 91 and provided so as to be positioned between two of the plurality of projecting portions 221 adjacent to each other in the circumferential direction of the stator 2 . It is

As a result, the eddy current 101 circulating around the protruding portion 221 and the eddy current 102 circulating between the two protruding portions 221 adjacent to each other in the outer diameter direction of the stator 2 can be insulated at the same time. Therefore, the axial gap type rotary electric machine 70 according to the present embodiment can further reduce eddy current loss and further improve motor efficiency.

Further, as shown in FIG. 15, the axial gap type rotating electric machine 70 according to this embodiment has the same fitting portion 521 as that of the first embodiment. However, the axial gap type rotary electric machine 70 only needs to have at least one fitting portion 521, and is not limited to this embodiment. That is, the axial gap type rotary electric machine 70 may have any one of the fitting portions 521 of the second to fourth embodiments.

(Eighth embodiment)
FIG. 16 is a schematic diagram of the housing 5 and the stator 2 seen from the axial direction of the shaft 4 before using the axial gap type rotary electric machine 80 according to the eighth embodiment of the present invention for a long period of time.

The difference from the axial gap type rotary electric machine 1 according to the first embodiment is that, as shown in FIG. The difference is that it has a portion 92 .

Each of the plurality of first insulating portions 91 protrudes from the surface of the mold resin 9 on which the conductive member 10 is provided, and is in contact with the side wall 222 provided on any one of the plurality of projecting portions 221 . is.

Each of the plurality of second insulating portions 92 protrudes from the surface of the mold resin 9 on which the conductive member 10 is provided, is in contact with the edge 251 of the shaft center hole 25, and is in contact with the circumferential direction of the stator 2 among the plurality of projecting portions 221. is a plate-shaped molding resin 9 provided so as to be positioned between two protruding portions 221 adjacent to each other. Each side surface of the plurality of second insulating portions 92 is coupled to one end provided on one of the plurality of first insulating portions 91 . The other end of one of the plurality of first insulating portions 91 is in contact with the conductive member 10 .

The conductive member 10 is not provided on the plurality of first insulating portions 91 and the plurality of second insulating portions 92 . Therefore, the eddy current 101 that circulates around the projecting portion 221 and the eddy current 102 that circulates between the two adjacent projecting portions 221 in the outer diameter direction of the stator 2 are the first insulating portion 91 and the second insulating portion 92 . isolated by Therefore, eddy current loss can be suppressed, and motor efficiency can be improved.

Also, the conductive member 10 is provided between each of the plurality of first insulating portions 91 and the edge 251 of the axial hole 25 . Therefore, the area of the conductive member 10 that shields the electrostatic coupling due to the common mode voltage induced from the coil 24 to the rotor 3 can be made wider than in the seventh embodiment. Therefore, the voltage applied to the bearing 6 can be reduced, and electrolytic corrosion of the bearing 6 can be further suppressed.

That is, the stator 2 according to the present embodiment includes a plurality of protruding portions 221 in which the iron core 22 protrudes from the mold resin 9, an axial center hole 25 in which the rotation axis O is arranged, and a plurality of insulating members 10. It has a first insulating portion 91 and a plurality of second insulating portions 92. Each of the plurality of first insulating portions 91 is in contact with a side wall 222 provided on one of the plurality of projecting portions 221, and a plurality of second insulating portions 92 are provided. Each of the two insulating portions 92 is provided so as to be in contact with the edge 251 of the axial hole 25 and to be positioned between two adjacent projecting portions 221 of the plurality of projecting portions 221 in the circumferential direction of the stator 2, One of the plurality of first insulation portions 91 is coupled to each of the plurality of second insulation portions 92 , and a conductive member is provided between each of the plurality of first insulation portions 91 and the edge 251 of the axial hole 25 . 10.

The axial gap type rotary electric machine 80 according to the present embodiment configured as described above has the eddy current 101 circulating around the projecting portion 221 and the current between the two projecting portions 221 adjacent to each other in the outer diameter direction of the stator 2 . eddy currents 102 circulating can be isolated. Therefore, eddy current loss can be further reduced, and motor efficiency can be further improved. In addition, the area of the conductive member 10 that shields the electrostatic coupling due to the common mode voltage induced from the coil 24 to the rotor 3 can be made wider than in the seventh embodiment. Therefore, the voltage applied to the bearing 6 can be further reduced, and electrolytic corrosion of the bearing 6 can be further suppressed.

Note that the ends of the plurality of second insulating portions 92 that are in contact with the edge 251 of the axial hole 25 of two of the plurality of second insulating portions 92 that are adjacent in the circumferential direction of the stator 2 are A plurality of third insulating portions 93 , which are arc-shaped mold resin 9 protruding from the surface of the mold resin 9 on which the conductive member 10 is provided and contacting the edge 251 of the axial hole 25 , may be used for coupling. Thereby, the strength of the plurality of second insulating portions 92 can be improved. In addition, the second insulating portion 92 and the third insulating portion 93 prevent the conductive member 10 provided on the surface of the mold resin 9 from contacting the edge 251 of the axial hole 25 . Therefore, in the step of providing the conductive member 10 on the surface of the mold resin 9 , it is possible to easily prevent the conductive member 10 from leaking into the axial hole 25 .

Also, in this embodiment, the second insulating portion 92 extends along the opposing side surfaces of the two projecting portions 221 adjacent to each other in the radial direction of the stator 2 . However, the second insulating portion 92 may be provided between two adjacent protrusions 221 of the plurality of protrusions 221 in the circumferential direction of the stator 2 . That is, the second insulating portion 92 may extend between the two adjacent projecting portions 221 in the radial direction of the stator 2 without along the opposing side surfaces of the two adjacent projecting portions 221 .

Although this embodiment shows an example in which the first insulating portion 91 and the second insulating portion 92 are provided by projecting the mold resin 9 from the surface of the mold resin 9 on which the conductive member 10 is provided, the present invention is not limited to this. For example, the conductive member 10 of conductive paint is applied to the surface of the stator 2 facing the rotor 3 using a template, and the portion not coated with the conductive member 10 is divided into the first insulating portion 91 and the second insulating portion. 92 may be used. Alternatively, the seal-like conductive member 10 may be attached to the surface of the mold resin 9 and the portions to which the conductive member 10 is not attached may be the first insulating portion 91 and the second insulating portion 92 . In this case, the third insulating portion 93 improves the strength of the plurality of second insulating portions 92 and prevents the conductive member 10 from overflowing the axial hole 25 in the step of providing the conductive member 10 on the surface of the mold resin 9 . is unnecessary.

Further, as shown in FIG. 16, the axial gap type rotary electric machine 80 according to this embodiment has the same fitting portion 521 as in the first embodiment. However, the axial gap type rotary electric machine 80 only needs to have at least one fitting portion 521, and is not limited to this embodiment. That is, the axial gap type rotary electric machine 80 may have any one of the fitting portions 521 of the second to fourth embodiments.

The present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the described configurations. Also, part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Moreover, it is possible to add, delete, or replace a part of the configuration of each embodiment with another configuration.

In addition, the embodiment of the present invention may be the following aspects. In the first to eighth embodiments described above, the conductive member 10 is provided in the predetermined region 12 before the axial gap type rotating electric machine is used for a long period of time. However, according to the present invention, the gap 11 is formed between the inner peripheral wall of the guide portion 52 and the mold resin 9 by using the axial gap type electric rotating machine for a long period of time, and the conductive gap 11 formed between the surfaces of the guide portion 52 and the mold resin 9 is formed. After the electrical member 10 has been cut, a conductive member 10 may be provided in the predetermined area 12 to reestablish the electrical connection between the housing 5 and the core 22 .

In addition, another conductive material, paint, single resin, composite resin, organic film, inorganic fiber, or the like is provided on the upper surface of the provided conductive member 10 to improve adhesion, adhesion, and heat resistance of the conductive member 10. etc. may be increased.

Moreover, it is preferable that the conductive member 10 is made of a conductive paint, and the surface of the mold resin 9 to which the conductive paint is applied is a rough surface. By roughening the surface of the mold resin 9, an anchor effect acts on the conductive member 10, and the adhesion and adhesion of the mold resin 9 to the surface of the mold resin 9 can be improved.

Also, three or more fitting portions 521 may be provided in the guide portion 52 of the housing 5 . As a result, it is possible to provide an axial gap type rotating electrical machine with improved reliability against electrolytic corrosion of the bearings. In this case, the three or more fitting portions 521 are preferably rotationally symmetrical with respect to the center O of the housing 5 . As a result, the stator 2 is pulled by each of the fitting portions 521 , and it is possible to suppress the radial deviation of the central axis with respect to the central axis of the housing 5 .

DESCRIPTION OF SYMBOLS 1, 20, 30, 50, 60, 70, 80, 100... Axial gap type rotary electric machine, 2... Stator 2, 3... Rotor, 5... Housing, 9... Mold resin, 10... Conductive member , 12... Predetermined area 21... Stator core 22... Iron core 221... Protruding part 24... Coil 521... Fitting part 91... First insulating part 92... Second insulating part

Claims (13)

a plurality of stator cores in which coils are wound around iron cores;
a stator in which the plurality of stator cores are arranged in a ring;
a rotor facing the stator via an air gap;
a housing covering the stator;
a mold resin filled between the stator and the housing;
a fitting portion provided in the housing and fitted with the mold resin;
a conductive member provided in a predetermined area around the fitting portion on the surface of the mold resin facing the rotor and electrically connecting the iron core and the housing ;
The housing has a heat receiving portion that receives heat from a heating element,
The fitting portion is located between two semi-cylindrical regions obtained by dividing the cylindrical portion of the housing by a plane passing through the central axis of the housing and the heat receiving portion, with the central axis of the housing interposed therebetween. An axial gap type rotary electric machine characterized in that they are provided so as to face each other . In the axial gap type rotary electric machine according to claim 1,
The stator has a protruding portion in which the iron core protrudes from the mold resin,
The axial gap type electric rotating machine, wherein the protrusion has a side wall electrically connected to the conductive member. In the axial gap type rotary electric machine according to claim 1 ,
When the direction in which the heat-receiving portion is positioned is the 12 o'clock direction with respect to the center point of the housing on a plane perpendicular to the central axis of the housing,
An axial gap type electric rotating machine, wherein the fitting portions are positioned in the 3 o'clock direction and the 9 o'clock direction with respect to the center point of the housing. In the axial gap type rotary electric machine according to claim 1,
The axial gap type rotary electric machine, wherein the fitting portion includes a convex portion or a concave portion having a constricted portion. In the axial gap type rotary electric machine according to claim 4 ,
The fitting portion includes a convex portion having a constricted portion,
The axial gap type rotary electric machine, wherein the projection is a member attached to the housing. In the axial gap type rotary electric machine according to claim 2,
The axial gap type rotary electric machine, wherein the conductive member is provided on the entire surface of the mold resin facing the rotor. In the axial gap type rotary electric machine according to claim 2,
The stator has an axial hole in which a rotating shaft is arranged and a first insulating portion that insulates the conductive member,
The axial gap type rotary electric machine, wherein the first insulating portion is in contact with a side wall of the projecting portion and an edge of the axial hole. In the axial gap type rotary electric machine according to claim 7 ,
The axial gap type rotary electric machine, wherein the first insulating portion is formed of a mold resin projecting from a surface of the mold resin on which the conductive member is provided. In the axial gap type rotary electric machine according to claim 1,
The stator has a plurality of protruding portions in which the iron core protrudes from the mold resin, a shaft center hole in which a rotating shaft is arranged, and a plurality of second insulating portions that insulate the conductive member,
Each of the plurality of second insulating portions is provided so as to be in contact with the edge of the axial center hole and positioned between two of the plurality of protrusions that are adjacent in the circumferential direction of the stator. An axial gap type rotary electric machine characterized by: In the axial gap type rotary electric machine according to claim 9 ,
The axial gap type rotary electric machine, wherein the second insulating portion is formed of a mold resin projecting from a surface of the mold resin on which the conductive member is provided. In the axial gap type rotary electric machine according to claim 1,
The stator includes a plurality of protrusions protruding from the mold resin, a shaft center hole in which a rotating shaft is arranged, a first insulation section and a plurality of second insulation sections for insulating the conductive member. has
the first insulating portion is in contact with the side wall of each of the plurality of projections and the edge of the axial hole;
Each of the plurality of second insulating portions is coupled to the first insulating portion and is provided so as to be positioned between two of the plurality of protrusions that are adjacent in the circumferential direction of the stator. An axial gap type rotary electric machine characterized by: In the axial gap type rotary electric machine according to claim 1,
The stator includes a plurality of protruding portions in which the iron core protrudes from the mold resin, a shaft center hole in which a rotating shaft is arranged, a plurality of first insulating portions that insulate the conductive member, and a plurality of second insulating portions that insulate the conductive member. and
each of the plurality of first insulating portions is in contact with a sidewall provided on one of the plurality of protrusions;
Each of the plurality of second insulating portions is provided so as to be in contact with the edge of the axial center hole and positioned between two of the plurality of protrusions that are adjacent in the circumferential direction of the stator. ,
one of the plurality of first insulating portions is coupled to each of the plurality of second insulating portions;
An axial gap type rotary electric machine, comprising the conductive member between each of the plurality of first insulating portions and an edge of the axial hole. In the axial gap type rotary electric machine according to claim 1,
The conductive member is formed of a conductive paint,
An axial gap type electric rotating machine, wherein the surface of the mold resin to which the conductive paint is applied is a rough surface.

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