JP2017099181A - Axial-gap dynamo-electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an axial-gap dynamo-electric machine which can be down-sized in the radial direction.SOLUTION: An axial-gap dynamo-electric machine 1 includes a rotor 2, a stator 4, and a case 6. The case 6 includes a first side case 7A and a second side case 7B provided respectively, with a peripheral wall 50 and an end face 52 closing one end thereof. In a posture where the end faces 52 are separated from each other, respective cases 7A, 7B are coupled while facing the peripheral walls 50 each other. The stator 4 has an annular shape having a through hole, through which the rotating shaft 10 penetrates, in the center, and is supported by the case 6 via the peripheral portion, while interposing the peripheral portion between the peripheral walls 50 of the side cases 7A, 7B.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an axial gap type rotating electrical machine (motor, generator, or motor / generator).

  Conventionally, an axial gap type rotating electrical machine (hereinafter, referred to as an axial gap type rotating electrical machine) having a structure in which a stator and a rotor are opposed to each other via an air gap in the rotor axial direction and the stator and the rotor are housed in a hollow cylindrical case. (Abbreviated as rotating electric machine) is known. For example, in Patent Document 1 (FIG. 3A), the rotor shaft is supported by end plates at both ends of the case so that the rotor is incorporated into the case, and the stator is fixed by a bolt member fixed across the both end plates. A rotating electrical machine supported by a case is disclosed.

Special Table 2007-529988

  However, according to the structure in which the stator is supported by the bolt members fixed across the end plates at both ends as in the rotating electrical machine of Patent Document 1, the bolt members are interposed between the stator and the case inner peripheral surface. Therefore, there is a drawback that the rotating electric machine is enlarged in the radial direction and the number of parts is increased. Therefore, there is room for improvement in this respect.

  This invention is made | formed in view of the above situations, and it aims at providing the axial gap type rotary electric machine in which size reduction of radial direction is possible.

  In order to solve the above-mentioned problems, the present invention provides an axial gap type rotating electrical machine having a rotating shaft and a rotor including a rotor body that rotates together with the rotating shaft, and a predetermined axial direction of the rotating shaft with respect to the rotor body. A stator disposed at intervals, and a case in which the rotor and the stator are accommodated, and the case includes a cylindrical peripheral wall portion extending in the axial direction and an end surface portion closing one end thereof. Including the first side case and the second side case, the end surfaces are separated from each other, and the side cases are joined with the peripheral wall portions facing each other. A ring with a through hole in the center, and at least a part of the peripheral edge portion interposed between the peripheral wall portions of the side cases via the peripheral edge portion. It is one that is supported by a serial case. More specifically, the peripheral edge is, for example, a flange provided in the stator.

  According to this configuration, the stator can be directly incorporated into the case without providing an intermediate member (bolt member) between the rotor (rotor main body) and the case inner peripheral surface as in the prior art. Moreover, since a part (peripheral part) of the stator is interposed between the peripheral wall parts of the first and second side cases, that is, the stator and the case overlap each other in the radial direction of the rotating electrical machine. It becomes possible to reduce the radial size of the gap type rotating electrical machine.

  In this case, it is preferable that these are integrally fastened in a state where the peripheral edge portion of the stator is sandwiched between the peripheral wall portions of the side cases.

  According to this configuration, the stator can be reliably and stably supported by the case.

  In the above configuration, the stator includes an annular stator body including a plurality of stator cores and coils attached to the stator cores, and is assembled to the stator body and extends radially outward from the stator body. It is preferable that the peripheral portion is a peripheral portion of the support plate.

  According to this configuration, since the dimension of the portion of the stator that is interposed between the side cases (dimension in the direction parallel to the rotation axis) can be kept small, the axial gap type rotating electrical machine is arranged in the rotation axis direction. It becomes possible to suppress an increase in size.

  In the axial gap type rotating electrical machine, the case further includes a cylindrical center case interposed between the first side case and the second side case, and the stator is disposed on both axial sides of the stator body. The center case is interposed between the pair of support plates and is interposed between the pair of support plates and the peripheral wall portions of the side cases. It is preferable that

  According to this configuration, since the stator is supported by the case at two positions separated in the axial direction, the stator can be supported more stably.

  In this case, the stator includes an inner cylinder member disposed on the inner side of the stator body, and the axial gap type rotating electrical machine is a coil in which a radial inner surface is formed by the inner cylinder member and the center case. An annular closed space for storage may be provided, and the center case may be provided with a coolant supply / discharge portion capable of supplying and discharging coolant in the closed space.

  According to this configuration, the cooling performance of the stator (particularly the coil) can be enhanced. In addition, since the radially inner side surface of the closed space to which the coolant is supplied is formed using the center case, it is possible to improve the cooling performance of the stator while suppressing the enlargement in the radial direction.

  In the above configuration, the center case and the pair of support plates are fastened to each other in the axial direction by a first bolt, and each side case and the center case are in the axial direction by a second bolt. It is preferable that the fastening position of the first bolt and the fastening position of the second bolt are on the same circumference of the center case and are offset from each other in the circumferential direction. .

  According to this configuration, the stator and the case can be fastened with the first and second bolts without increasing the peripheral wall portion of the case (the thickness of the peripheral wall portion of each side case).

  In the axial gap type rotating electrical machine described above, it is preferable to have a positioning portion for positioning each side case and the stator in the circumferential direction.

  According to this configuration, it is possible to easily position the stator and each side case at the time of assembly, so that the productivity of the axial gap type rotating electrical machine is improved.

  As described above, according to the present invention, it is possible to provide an axial gap type rotating electrical machine that can be reduced in the radial direction.

It is sectional drawing of the axial gap type rotary electric machine which concerns on 1st Embodiment of this invention. It is an exploded sectional view of the axial gap type rotating electrical machine. It is a top view of the said axial gap type rotary electric machine. It is a perspective view of a stator. It is a perspective view of a stator core. It is principal part sectional drawing of the said axial gap type rotary electric machine which shows the positioning structure of the said stator and a case. It is principal part sectional drawing of the said axial gap type rotary electric machine which shows the fixation structure of the said stator and case. It is a disassembled perspective view which shows the axial gap type rotary electric machine which concerns on 2nd Embodiment of this invention.

  Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

(First embodiment)
1 is a sectional view of an axial gap type rotating electrical machine according to a first embodiment of the present invention, FIG. 2 is an exploded sectional view of the axial gap type rotating electrical machine, and FIG. 3 is the axial gap type rotating electrical machine. It is a top view of an electric machine.

  As shown in these drawings, an axial gap type rotating electrical machine 1 (hereinafter, abbreviated as rotating electrical machine 1) is interposed between a rotor 2 having a rotating shaft 10 as a center and rotor main bodies 14A and 14B described later of the rotor 2. The rotor 4 is provided with a stator 4 facing the rotor main bodies 14A and 14B at a predetermined interval in the axial direction of the rotary shaft 10, and a case 6 in which the rotor 2 and the stator 4 are accommodated.

  In the following description, the direction parallel to the rotation shaft 10 is referred to as “axial direction”, the direction orthogonal to the rotation shaft 10 is referred to as “radial direction”, and the rotation direction of the rotation shaft 10 (rotor 2) is referred to as “circumferential direction”. .

  The rotor 2 includes a pair of disk-shaped rotor main bodies 14A and 14B arranged to face each other at a predetermined interval, and the rotating shaft 10 penetrating through the centers of the rotor main bodies 14A and 14.

  Each rotor main body 14A, 14B is fixed to a rotating shaft 10, and the rotating shaft 10 is rotatably supported by the case 6 via a bearing 8 described later.

  As shown in FIG. 2, the rotating shaft 10 has a main shaft portion 11a at the center in the axial direction, and a multi-stage shaft structure in which a spline shaft portion 11b, a screw shaft portion 11c, and a support shaft portion 11d are arranged in that order on both sides. The main shaft portion 11a has the largest diameter (outer diameter), and the diameter decreases sequentially in the order of the spline shaft portion 11b, the screw shaft portion 11c, and the support shaft portion 11d. On the other hand, a through hole 16a having a spline groove corresponding to the spline shaft 11b is formed at the center of the rotor bodies 14A and 14B. Then, the rotor main bodies 14A and 14B are mounted from both sides of the rotary shaft 10 previously inserted into the stator 4 so that the spline shaft portions 11b are inserted into the through holes 16a, respectively, and further, nut members from the outside thereof. 26 is screwed to the screw shaft portion 11c, whereby the rotor main bodies 14A and 14B are sandwiched between the nut member 26 and the main shaft portion 11a of the rotary shaft 10 via the spacers 28, respectively. Thereby, each rotor main body 14A, 14B and the rotating shaft 10 are being fixed so that integral rotation is possible.

  The rotor bodies 14A and 14B have the same basic structure except for the orientation. As shown in FIGS. 1 and 2, each rotor main body 14A, 14B has a circular base member 16 having an annular groove on the stator facing surface and having the through hole 16a at the center, and the groove A permanent magnet 18 provided at a plurality of positions in the inner circumferential direction, a back yoke 20 fixed to the surface of the permanent magnet 18 on the side opposite to the stator, and a space between the inner bottom surface of the groove and the back yoke 20. And an annular cooling liquid jacket 22.

  A coolant such as oil can be supplied to and discharged from the coolant jacket 22 through the rotary shaft 10. Specifically, the base member 16 has a rotor-side liquid supply passage 24 that opens to a position facing the end surface of the main shaft portion 11a of the rotary shaft 10 and communicates with the coolant jacket 22, and this rotor across the through hole 16a. A rotor-side liquid discharge passage 25 that opens to a position opposite to the end surface of the main shaft portion 11 a and communicates with the coolant jacket 22 is formed at a position opposite to the side liquid supply passage 24. On the other hand, the rotary shaft 10 opens to the positions of both end surfaces of the main shaft portion 11a and opens to the positions of both end surfaces of the main shaft portion 11a and the shaft side liquid supply passage 12 communicating with the rotor side liquid supply passage 24. Thus, a shaft-side liquid discharge passage 13 communicating with the rotor-side liquid discharge passage 25 is formed. As a result, the coolant is supplied from the rotary shaft 10 to the coolant jackets 22 of the rotor main bodies 14A and 14B, and after flowing through the rotor main bodies 14A and 14B, the rotor side liquid discharge passage 25 and the shaft side liquid discharge passage 13 are supplied. Are discharged from the rotor main bodies 14A and 14B to the rotary shaft 10.

  The stator 4 is disposed between both rotor bodies 14A and 14B of the rotor 2.

  As shown in FIG. 4, the stator 4 includes a stator body 29 provided with a plurality of stator cores 30 arranged in the circumferential direction and coils 31 attached (wound) to each stator core 30, and the stator body 29 from both sides in the axial direction. A pair of support plates 33 to be supported and an inner cylinder member 32 that is disposed inside the stator body 29 and connects the pair of support plates 33 are included.

  As shown in FIG. 5, the stator core 30 includes a core body 35 and a bobbin 38 attached to the core body 35. The core body 35 has a block-like structure in which a plurality of electromagnetic steel plates 36 cut into a predetermined shape are stacked in the radial direction. More specifically, a plurality of laminated bodies each having a plurality of electromagnetic steel plates 36 having the same shape are laminated in the radial direction, and the laminated bodies have different dimensions in the width direction. And the dimension of the said width direction is set larger in the direction of the laminated body located in the radial direction outer side than the laminated body located in the radial inside. Thereby, the core main body 35 is formed in a substantially trapezoidal shape in plan view.

  Each electromagnetic steel plate 36 constituting the core body 35 is integrally held by a bobbin 38. Specifically, the bobbin 38 is formed of an insulating resin material. In this example, the stator core 30 is formed by insert molding using the core body 35 as a metal part and the bobbin 38 as a resin part. That is, the core body 35 and the bobbin 38 are integrally molded so as to surround the core body 35 with the bobbin 38.

  As shown in FIG. 5, the bobbin 38 includes a cylindrical portion 40 that surrounds the core main body 35 and a flange portion 41 that extends outward from both ends in the axial direction. A coil 31 is wound on the outer peripheral surface of the portion 40.

  Each flange 41 of the bobbin 38 is formed in a substantially fan shape in plan view. Of each collar portion 41, one end side in the circumferential direction is formed with a convex portion 41a that protrudes in the same direction and extends in the radial direction, and the other end side has a diameter with which the convex portion 41a can be fitted. A recess 41b extending in the direction is formed. That is, the stator cores 30 are connected to each other by arranging the stator cores 30 in the circumferential direction and fitting the bobbins 38, specifically, by fitting the convex portions 41a to the concave portions 41b. In this case, the flange portions 41 of the adjacent stator cores 30 (bobbins 38) are connected in a liquid-tight state by fitting the convex portions 41a and the concave portions 41b.

  The plurality of stator cores 30 are connected in an annular shape as shown in FIG. 4 by fitting the bobbins 38 of the adjacent stator cores 30 as described above, whereby the stator body 29 is configured.

  The pair of support plates 33 are disk-shaped members made of a nonmagnetic material (ceramic such as alumina, reinforced plastic, austenitic stainless steel, aluminum, etc.) and have the same configuration. Ceramics and reinforced plastics in particular are optimal because they are non-electrically conductive and do not cause eddy current losses.

  Each support plate 33 is fixed to the stator body 29 with the stator body 29 sandwiched from both sides in the axial direction. Each support plate 33 includes a circular shaft hole 42 through which the main shaft portion 11a of the rotary shaft 10 passes. Each support plate 33 has an outer diameter dimension equivalent to the outer diameter of the case 6, and extends from the stator main body 29 outward in the radial direction. That is, the peripheral portion of each support plate 33 forms a flange portion of the stator 4.

  Each support plate 33 includes a plurality of window portions 44 having a shape corresponding to the core main body 35 around the shaft hole 42. On the other hand, as shown in FIG. 5, the core body 35 of the stator core 30 is provided with a portion that protrudes outward in the axial direction from the end surface of the bobbin 38, and the protruding portion fits into the window portion 44. In addition, each support plate 33 is overlapped on both sides of the stator core coupling body. Thus, the end surface of the core body 35 of each stator core 30 faces the rotor bodies 14A and 14B by fitting the end portions of the core body 35 to the window portions 44 of the support plates 33.

  Although not shown, a seal member 24 is interposed between each support plate 33 and the stator body 29 to seal the space between each support plate 33 and the stator body 29 in a liquid-tight state. .

  The inner cylinder member 32 is disposed inside the stator body 29. The inner cylinder member 32 is formed of a nonmagnetic material (ceramic such as alumina, reinforced plastic, austenitic stainless steel, aluminum, or the like) in the same manner as the support plate 33. As shown in FIG. 2, the inner cylinder member 32 is interposed between the pair of support plates 33, and the support plate 33 is bolted from both sides in the axial direction with respect to the inner cylinder member 30. ) It is fixed at B1. In FIG. 4, the illustration of the bolt B1 and the like is omitted.

  As shown in FIGS. 1 and 2, the case 6 includes a first side case 7 </ b> A and a second side case 7 </ b> B located at both axial ends of the rotating electrical machine 1, and a center case 7 </ b> C located therebetween. Has been.

  The first side case 7A and the second side case 7B have the same basic configuration except for the orientation. Each of the side cases 7A and 7B includes a cylindrical peripheral wall portion 50 extending in the axial direction and an end surface portion 52 that closes one end thereof, and the peripheral wall portion 50 and the end surface portion 52 are integrally formed of the same material. Have. A shaft hole 52 a is formed at the center of the end surface portion 52, and the bearing 8 is fixed inside the end surface portion 52 concentrically with the shaft hole 52 a. On the other hand, the center case 7C has a cylindrical shape having an inner diameter and an outer diameter equivalent to the peripheral wall portions 50 of the side cases 7A and 7B.

  Of the cases 6, the center case 7 </ b> C is assembled to the stator 4. Specifically, as shown in FIGS. 1 and 2, a center case 7C is interposed between the pair of support plates 33, and a bolt (a countersunk screw) B1 is formed in an end face of the center case 7C. Are inserted through the through holes formed in the respective support plates 33. Thereby, the center case 7 </ b> C is fixed to the peripheral edge portion of the stator 4.

  On the other hand, the side cases 7A and 7B are assembled to the stator 4 in such a posture that the end face portions 52 are separated from each other and the peripheral wall portions 50 face each other. Specifically, as shown in FIGS. 2 and 7, the peripheral wall portions 50 of the side cases 7 </ b> A and 7 </ b> B are formed with the rotating shaft 10 (support shaft portion 11 d) being led out through the bearing 8 and the shaft hole 52 a. It is abutted against the peripheral edge of the stator 4, that is, the peripheral edge of the support plate 33 from both axial sides. In this state, the bolt B2 is screwed into a bolt hole formed in the end surface of the center case 7C through a through hole formed in the countersink portion 51 of each side case 7A, 7B and the support plate 33, respectively. Has been. Thereby, the rotor 2 and the stator 4 are accommodated in the case 6 and supported by the case 6.

  As shown in FIGS. 3 and 6, positioning pins 56 are respectively provided at two positions aligned in the radial direction on the end surfaces of the peripheral wall portions 50 of the side cases 7 </ b> A and 7 </ b> B. The positioning pins 56 are inserted into positioning holes 57 formed in the end surfaces of the support plate 33 and the center case 7C, whereby the side cases 7A and 7B and the stator 4 are positioned relative to each other in the circumferential direction. . That is, in this example, the positioning pin 56 and the positioning hole 57 correspond to the positioning portion of the present invention.

  The positions of the bolts B2 for fixing the side cases 7A and 7B to the center case 7C, the positions of the bolts B1 for fixing the support plates 33 to the center case 7C in the stator 4, the positioning pins 56 and the positioning holes 57 As shown in FIG. 3, the positions are on the same circumference of the end surface of the center case and are offset from each other in the circumferential direction. As a result, the side cases 7A and 7B and the support plate 33 can be fastened together with the bolts B1 and B2 in the axial direction with respect to the center case 7C.

  As shown in FIGS. 6 and 7, a stepped portion 54 is formed inside the end surface of the center case 7 </ b> C, and a ring-shaped seal member 55 is disposed on the stepped portion 54. The outer peripheral edge portion of the stator body 29, specifically, the radially outer edge portion of the flange portion 41 of each bobbin 38 connected in the circumferential direction is pressed against the seal member 55, whereby the stator body. 29 and the center case 7C are sealed. Although not shown, similarly, a stepped portion is formed outside the end surface of the inner cylinder member 32, and a ring-shaped seal member is disposed on the stepped portion, so that the inner peripheral wall portion of each stator body 29 (each Of the flange portion 41 of the bobbin 38, the radially inner edge thereof is pressed against the seal member, so that the space between the stator main body 29 and the inner cylinder member 32 is sealed. As described above, the stator body 29 is sealed between the inner cylinder member 32 and the center case 7C, so that the coil 31 is accommodated by the inner cylinder member 32, the center case 7C, and the stator body 29. An annular closed space 60 in a state is formed.

  A cooling liquid introduction port IP and a derivation port OP are provided at positions opposite to each other in the radial direction in the center case 7C, and a cooling liquid such as oil is provided in the closed space 60. Can be supplied and discharged. That is, the cooling liquid is introduced into the closed space 60 from the introduction port IP, and the cooling liquid is led to the outside from the outlet port OP, whereby the cooling liquid is circulated through the closed space 60. It is configured to cool.

  According to the rotating electric machine 1 as described above, the stator 4 is directly supported by the case 6 with its peripheral portion sandwiched between the side cases 7A and 7B and the center case 7C. The stator 4 can be incorporated in the case 6 without providing an intermediate member (bolt member) for supporting the stator 4 between the stator 4 and the inner peripheral surface of the case 6 as in Literature 1). Further, a part (peripheral portion) of the stator 4 is interposed between the peripheral wall portions 50 of the side cases 7A and 7B, that is, the stator 4 and the case 6 overlap each other in the radial direction of the rotating electrical machine 1. Become. Therefore, according to the configuration of the rotating electrical machine 1, there is an advantage that the rotating electrical machine 1 can be reduced in size in the radial direction as compared with the related art.

  In addition, according to the above configuration, the stator 4 is configured by the annular stator body 29 including the stator core 30 and the coil 31 and the disk-shaped support plate 33 assembled to the stator body 29. Since the peripheral portion of the plate 33 is supported by the case 6 by being sandwiched between the side cases 7A and 7B and the center case 7C, the portion of the stator 4 that is sandwiched between the side cases 7A and 7B, etc. Dimensions (axial dimensions) can be kept small. Therefore, there is an advantage that the rotating electrical machine 1 can be prevented from being enlarged in the direction of the rotation axis while the peripheral edge portion of the stator 4 is sandwiched between the peripheral wall portions 50 of the side cases 7A and 7B.

  In addition, in the rotating electrical machine 1, a pair of support plates 33 is provided on both sides in the axial direction of the stator body 29, while the case 6 includes two side cases 7 </ b> A and 7 </ b> B and a center case 7 </ b> C positioned therebetween. ing. The center case 7C is interposed between the pair of support plates 33 of the stator 4 so that the center case 7C is sandwiched between the side cases 7A and 7B together with the pair of support plates 33. That is, the stator 4 is supported by the case 6 at two positions spaced apart in the axial direction. Therefore, there is an advantage that the support rigidity of the stator 4 is high and the stator 4 can be stably supported by the case 6.

  In the rotating electrical machine 1, the inner cylindrical member 32, the center case 7 </ b> C, and the stator main body 29 form an annular closed space 60 in which the coil 31 is accommodated, and coolant is supplied to the closed space 60. Thus, the coil 31 and thus the stator 4 are cooled. Therefore, there is an advantage that the cooling performance of the stator 4 can be effectively enhanced. Moreover, the closed space 60 in which the coolant circulates is formed by using the center case 7C, that is, the inner surface of the closed space 60 in the radial direction is formed by the inner cylindrical member 32 and the center case 7C. Therefore, there is an advantage that the closed space 60 can be formed with a rational configuration using the center case 7C and the cooling performance of the stator 4 can be improved.

  In the rotating electrical machine 1, the fastening position of the center case 7C and the support plate 33 by the bolt B1 and the fastening position of the side cases 7A and 7B and the center case 7C by the bolt B2 are the same on the end surface of the center case. They are on the circumference and are offset from each other in the circumferential direction. Therefore, expansion of the radial thickness of the case 6 (the peripheral wall portions 50 of the side cases 7A and 7B and the center case 7C) is suppressed while the stator 4 and the case 6 are fastened in the axial direction by the bolts B1 and B2. This also contributes to the reduction in size of the rotating electrical machine 1 in the radial direction.

(Second Embodiment)
FIG. 8 is an exploded perspective view showing the rotating electrical machine 1 according to the second embodiment.

  The rotating electrical machine 1 according to the second embodiment is different from the first embodiment in the configuration of the case 6 and the stator 4 in the following points, and the other configuration is basically the rotating electrical machine of the first embodiment. 1 and in common. In FIG. 8, the rotor 2 is omitted for convenience.

  In the second embodiment, the pair of support plates 33 (referred to as the first support plate 33 </ b> A and the second support plate 33 </ b> B) of the stator 4 are set to have outer diameters substantially equal to the stator main body 29. A plurality of flange portions 34 projecting outward are provided at a plurality of positions in the circumferential direction. In the illustrated example, each of the support plates 33A and 33B includes four flange portions 34, and each flange portion 34 of the first support plate 33A and each flange portion 34 of the second support plate 33B include: They are offset in the circumferential direction so as to be arranged alternately at equal intervals in the circumferential direction.

  The case 6 of the second embodiment includes a first side case 7A and a second side case 7B, and does not include the center case 7C as in the first embodiment.

  The configuration of the first side case 7A is basically the same as that of the first embodiment. On the other hand, since the center case 7C is omitted, the second side case 7B has a structure deeper than that of the first embodiment, that is, a structure in which the axial length of the peripheral wall portion 50 is long.

  On the end surface of the second side case 7B, two types of countersink portions corresponding to the flange portion 34 of the stator 4 are formed alternately at equal intervals in the circumferential direction. Specifically, of the two support plates 33A and 33B, a relatively shallow first countersink corresponding to each flange portion 34 of the first support plate 33A located on the side case first side case 7A side (upper side in FIG. 8). Portions 53a and relatively deep second countersunk portions 53b corresponding to the flange portions 34 of the other second support plate 33B are formed alternately and at equal intervals in the circumferential direction. In addition, each counterboring part 53a, 53b is notched and opened by the inner peripheral surface side of the surrounding wall part 50 so that the said flange part 34 can be interposed.

  In the stator 4, as shown in FIG. 8, the flange portion 34 of the first support plate 33A is interposed in the first countersunk portion 53a, and the flange portion 34 of the second support plate 33B is interposed in the second countersink portion 53b. Thus, it inserts in the 2nd side case 7B, and each flange part 34 is being fixed to the 2nd side case 7B by being fixed to the inner bottom face of each countersink part 53a, 53b with the volt | bolt outside a figure. And the bolt B2 is formed in the end surface of the 2nd side case 7B through the through-hole formed in the countersink part 51 of the 1st side case 7A in the state which faced each peripheral wall part 50 of each side case 7A, 7B. Both side cases 7A and 7B are fixed integrally by being screwed and inserted into the bolt holes.

  In the rotating electrical machine 1 of the second embodiment as described above, the peripheral portion of the stator 4, that is, the flange portion 34 of each support plate 33 </ b> A, 33 </ b> B is attached to the case 6 in a state of being interposed between the side cases 7 </ b> A, 7 </ b> B. Since it is directly supported, it contributes to the radial reduction of the rotating electrical machine 1 in the same manner as the rotating electrical machine 1 of the first embodiment.

  Although the rotary electric machine 1 of the present invention has been described above, the rotary electric machine 1 of the first and second embodiments is an example of a preferred embodiment of the axial gap type rotary electric machine of the present invention, and its specific configuration. Can be appropriately changed without departing from the scope of the present invention.

  For example, in the first and second embodiments, an example in which the present invention is applied to a two-rotor, one-stator type rotating electrical machine 1 in which two rotor bodies 14A, 14B are provided on both sides of one stator 4 will be described. However, the present invention can also be applied to a 1-rotor, 1-stator type, 1-rotor, 2-stator type rotating electrical machine.

DESCRIPTION OF SYMBOLS 1 Axial gap type rotary electric machine 2 Rotor 4 Stator 6 Case 7A 1st side case 7B 2nd side case 7C Center case 10 Rotating shaft 14A, 14B Rotor main body 29 Stator main body 30 Stator core 31 Coil 32 Inner cylinder member 50 Peripheral wall part 52 End surface part

Claims (8)

In axial gap type rotating electrical machines,
A rotor comprising a rotating shaft and a rotor body rotating with the rotating shaft;
A stator disposed at a predetermined interval in the axial direction of the rotating shaft with respect to the rotor body;
A case in which the rotor and the stator are accommodated,
The case includes a first side case and a second side case each having a cylindrical peripheral wall portion extending in the axial direction and an end surface portion that closes one end thereof, and each side case is in a posture in which the end surface portions are separated from each other. , Which are combined with their peripheral walls facing each other,
The stator has an annular shape centered around a through hole through which the rotating shaft passes, and at least a part of the peripheral portion is interposed between the peripheral wall portions of the side cases. And an axial gap type rotating electrical machine supported by the case. In the axial gap type rotating electrical machine according to claim 1,
The axial gap type rotating electrical machine, wherein the peripheral portion is a flange portion provided in the stator. In the axial gap type rotating electrical machine according to claim 1 or 2,
An axial gap type rotating electrical machine characterized in that they are fastened together with the peripheral edge of the stator being sandwiched between the peripheral walls of each side case. In the axial gap type rotating electrical machine according to any one of claims 1 to 3,
The stator includes an annular stator body including a plurality of stator cores and coils attached to the stator cores, and a support plate that is assembled to the stator body and extends radially outward from the stator body. Including
The axial gap type rotating electrical machine, wherein the peripheral edge is a peripheral edge of the support plate. In the axial gap type rotating electrical machine according to claim 4,
The case further includes a cylindrical center case interposed between the first side case and the second side case,
The stator includes a pair of the support plates assembled on both axial sides of the stator body,
The axial gap type rotating electrical machine, wherein the center case is interposed between the pair of support plates and interposed between the peripheral wall portions of the side cases together with the pair of support plates. In the axial gap type rotating electrical machine according to claim 5,
The stator includes an inner cylinder member disposed inside the stator body,
The axial gap type rotating electrical machine has an annular closed space for coil storage in which a radially inner side surface is formed by the inner cylindrical member and the center case,
The axial gap type rotating electrical machine according to claim 1, wherein the center case is provided with a coolant supply / discharge portion capable of supplying and discharging coolant in the closed space. In the axial gap type rotating electrical machine according to claim 5 or 6,
The center case and the pair of support plates are fastened to each other in the axial direction by a first bolt,
The side cases and the center case are fastened to each other in the axial direction by a second bolt,
The axial gap type rotating electric machine characterized in that the fastening position of the first bolt and the fastening position of the second bolt are on the same circumference of the end face of the center case and are offset from each other in the circumferential direction. . In the axial gap type rotating electrical machine according to any one of claims 1 to 7,
An axial gap type rotating electrical machine comprising a positioning portion for positioning each side case and the stator in a circumferential direction.

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