JP6210002B2 - Axial gap type rotating electrical machine - Google Patents

Description

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

  For example, as disclosed in Patent Document 1, an stator having a structure in which a stator and a rotor are arranged so as to face each other in the rotor axial direction through an air gap, and the stator and the rotor are accommodated in a hollow cylindrical housing. Gap type rotating electrical machines are known.

  In this axial gap type rotating electric machine, the stator includes a disk-shaped iron core holding member, a plurality of fixed iron cores fixed to the iron core holding member in a state of being arranged in the circumferential direction, and a coil wound around each of the fixed iron cores. And is fixed to the housing via an iron core holding member. On the other hand, the rotor passes through the center of the iron core holding member and is rotatably supported by the iron core holding member, and on both sides of the iron core holding member via a predetermined air gap, and a plurality of permanent magnets. It is comprised with a pair of rotor disk by which the magnet was arranged in the circumferential direction.

JP 2010-246171 A

  In the axial gap type rotating electrical machine disclosed in Patent Document 1, as described above, the stator is fixed to the housing by the iron core holding member. However, in the structure in which the entire stator is supported by such a disk-shaped member (iron core holding member), it is conceivable that the torque performance is affected by the occurrence of distortion in the iron core holding member and thus the entire stator.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide an axial gap type rotating electrical machine capable of improving the support rigidity of a stator.

In order to solve the above-mentioned problems, an axial gap type rotating electrical machine according to the present invention includes a rotor having a rotating shaft and a rotor main body that rotates together with the rotating shaft, and an axial direction of the rotating shaft facing the rotor main body. A stator that is disposed, and a cylindrical housing that accommodates the rotor and the stator. The stator includes a plurality of stator cores arranged in a circumferential direction, coils that are attached to the stator cores, and both sides in the axial direction. A pair of support members that each support the stator core, an outer cylindrical member that forms an outer wall of the stator by being interposed between the pair of support members and fixed to the support member, and an inner side of the plurality of stator cores An inner cylinder member interposed between the pair of support members at a position and surrounded by the inner cylinder member, the pair of support members, and the outer cylinder member The coil is disposed in a closed space, and the outer cylinder member is fixed to the housing in a state where the coil is inserted into the housing and the outer cylinder member is fitted on the inner peripheral surface thereof. As a result, the axial gap rotating electrical machine is further assembled with the housing via the outer cylinder member, and the axial gap type rotating electrical machine can further supply and discharge cooling liquid for cooling the coil with respect to the closed space. And a sealing member laminated on the support member to keep the closed space in a liquid-tight state, and each stator core is formed of a magnetic body and an insulating material. A bobbin fixed on the outer peripheral surface of the main body, and the coil is mounted on the outer peripheral surface of the bobbin, and the bobbin extends along the support member on both sides of the coil in the axial direction. And a plurality of adjacent stator core bobbins that can be connected in a liquid-tight state, and the plurality of stator cores have an annular shape by connecting the adjacent bobbin of the stator core via the flanges. Of the two flanges on both sides of the coil in the bobbin, the width dimension in the circumferential direction of the collar part on one side is set shorter than the width dimension in the circumferential direction of the collar part on the other side. It is what.

  According to this axial gap type rotating electrical machine, the stator core is supported from both sides in the axial direction of the rotating shaft by the pair of support members fixed to the housing, so that the stator core (fixed core) is supported by the single support member (core holding member). The support rigidity of the stator is increased as compared with the conventional type in which the is supported. Therefore, it is possible to avoid inconvenience that the stator is distorted and affects the torque performance.

In addition , since the entire stator including the outer cylinder member can be built in advance and the stator can be incorporated into the housing, it is possible to improve the assemblability while increasing the support rigidity of the stator.

In addition , the coil can be cooled by forming a closed space with a rational configuration using the support member and the outer cylinder member .

Further, since the seal member is laminated on the support member and the liquid tightness of the closed space is enhanced, it is possible to prevent the leakage of the coolant to the rotor side to a higher degree.

In addition , since a collar portion connected in the circumferential direction is interposed between the pair of support members and the coils of the stator cores, the leakage of the coolant from the closed space to the rotor side can be further prevented. It becomes possible to do.

Moreover, it is possible to insert the stator core from mutually different sides in the axial direction while providing the flange portion, and the configuration of the stator can be simplified.

  In this case, a window part that exposes the core body to the rotor side is formed in the support member on the side facing the rotor of the pair of support members, and the window part is formed on the core body from the outside. It is preferable that a pressing portion for engaging and positioning the stator core while pressing the core body is formed.

  According to this configuration, the stator core and the support member can be appropriately positioned while pressing each stator core.

  In the axial gap rotating electrical machine described above, it is preferable that an induction plate that guides the coolant to flow in the closed space along a predetermined path is provided in the closed space. is there.

  According to this configuration, the coil can be cooled by efficiently flowing the coolant in the closed space.

  In this case, it is preferable that the guide plate is disposed so that the coolant flows in the circumferential direction while meandering in the closed space via the adjacent coils.

  According to this configuration, in addition to allowing the coolant to reliably pass through each coil, the flow rate of the coolant can be increased. Therefore, it becomes possible to cool each coil much more efficiently.

  As described above, according to the axial gap type rotating electric machine of the present invention, the support rigidity of the stator can be effectively increased.

1 is an exploded perspective view showing an axial gap type rotating electrical machine (axial gap type rotating electrical machine to which a stator core of the present invention is applied) according to a first embodiment of the present invention. It is a perspective view which shows the stator integrated in a rotary electric machine. It is sectional drawing (III-III sectional view taken on the line of FIG. 2) of a rotary electric machine. It is sectional drawing (IV-IV sectional view taken on the line of FIG. 3) of a rotary electric machine. (A) is a top view which shows a stator core, (b) is the same side view (b arrow view of (a)), (c) is the same front view (a arrow view of (a)). is there. It is sectional drawing which shows the modification of a rotary electric machine. It is sectional drawing which shows the modification of a rotary electric machine. It is a schematic diagram explaining the structure of a stator. It is a schematic diagram explaining the structure of a stator. It is a figure which shows the modification of a stator core, (a) is a top view, (b) is a side view (c arrow line view of (a)). It is a disassembled perspective view which shows the axial gap type rotary electric machine which concerns on 2nd Embodiment of this invention. It is a perspective view which shows the stator integrated in a rotary electric machine. It is sectional drawing (XIII-XIII sectional view taken on the line of FIG. 12) of a rotary electric machine. It is sectional drawing which shows the modification of a rotary electric machine. It is a figure which shows the modification of the stator integrated in the axial gap type rotary electric machine which concerns on 2nd Embodiment of this invention, (a) is a perspective view, (b) is XV-XV sectional view taken on the line of (a). ).

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

(First embodiment)
FIG. 1 is an exploded perspective view of the rotating electrical machine according to the first embodiment of the present invention. A rotating electrical machine 1A shown in the figure is interposed between a rotor 2 having a rotating shaft 10 as a center and rotor rotor bodies 12A and 12B described later of the rotor 2, and the axis of the rotating shaft 10 with respect to the rotor bodies 12A and 12B. This is a so-called axial gap type rotating electrical machine including a stator 4 facing the direction with a predetermined interval and a housing 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 bodies 12A and 12B that are arranged to face each other at a predetermined interval, and a rotating shaft 10 that passes through the centers of the rotor bodies 12A and 12B. Each rotor body 12A, 12B is fixed to a rotating shaft 10, and the rotating shaft 10 is supported by the stator 4 via a bearing 28 described later. With this configuration, the rotor 2 is rotatably supported with respect to the stator 4.

  Each of the rotor bodies 12A and 12B includes a rotor disk 14 that also serves as a back yoke and a plurality of permanent magnets 16 that are fixed to the rotor disk 14 in a state of being arranged in the circumferential direction. Each permanent magnet 16 is a plate-like magnet, and is fixed to a surface of the rotor disk 14 that faces the stator 4. The permanent magnet 16 of the rotor body 12A on the one side and the permanent magnet 16 of the rotor body 12B on the other side are mirror-symmetrical. In this example, for the purpose of reducing cogging torque, etc., it is slightly rhombus in plan view. It has a close shape. Note that the number and arrangement of the permanent magnets 16 in the rotor main bodies 12A and 12B are the same.

  The stator 4 is disposed between the rotor bodies 12A and 12B. As shown in FIG. 1, the stator 4 includes a plurality of stator cores 22 arranged in the circumferential direction, a coil 23 mounted (wound) on each stator core 22, and a pair of support members that support the stator core 22 from both sides in the axial direction. 26, an inner cylindrical member 20 that is disposed inside the plurality of stator cores 22 and connects the pair of support members 26, and a seal member 24 that is interposed between each support member 26 and the stator core 22, respectively. including.

  2 to 4 show the stator 4, and FIGS. 5A to 5C each show the stator core 22.

  The stator core 22 includes a core body 40 and a bobbin 44 attached to the core body 40. The core body 40 has a block-like structure in which a plurality of electromagnetic steel plates 41 pressed into a predetermined shape are laminated in the radial direction. More specifically, the core body is configured by laminating a plurality of laminated bodies g1 to g6 in which a plurality of electromagnetic steel plates 41 each having the same shape are laminated, and each laminated body. g1 to g6 are different from each other in the width direction perpendicular to the radial direction (the left-right direction in FIG. 5A), and the laminated body located radially outside the laminated body located radially inside is more preferable. The dimension in the width direction is set large. Thereby, as shown in FIG. 5A, the core main body 40 is formed in a substantially trapezoidal shape that is tapered from the radially outer side to the inner side in a plan view.

  Each electromagnetic steel plate 41 constituting the core body 40 is integrally held by a bobbin 44. That is, the bobbin 44 is formed of an insulating resin material. In this example, the stator core 22 is molded by insert molding using the core body 40 as a metal part and the bobbin 44 as a resin part. That is, the core body 40 and the bobbin 44 are integrally formed so as to surround the core body 40 with the bobbin 44.

  The resin material includes fillers such as glass fiber, carbon fiber, whisker, and talc, for example, so that the bobbin 44 has a linear expansion coefficient substantially equal to the linear expansion coefficient of the core body 40. 44 is formed.

  Reference numerals 42 shown in FIGS. 5A and 5C are notches for positioning, and are formed at the outer peripheral portion of each electromagnetic steel plate 41, in this example, at both ends in the axial direction and in the central portion in the width direction. Has been. This notch 42 positions each electromagnetic steel plate 41 with respect to the mold during the insert molding. This point will be mentioned later.

  As shown in FIGS. 5B and 5C, the bobbin 44 has a cylindrical portion 46 surrounding the core body 40 and flanges 47 formed at both upper and lower ends thereof, and illustration thereof is omitted. However, the coil 23 is wound on the outer peripheral surface of the cylindrical portion 46.

  As shown in FIG. 5A, each flange 47 of the bobbin 44 is formed in a substantially fan shape in plan view. Of each flange portion 47, one end side in the circumferential direction is formed with a convex portion 47a that protrudes in the same direction and extends in the radial direction, and the other end side has a diameter with which the flange portion 47 can be fitted. A recess 47b extending in the direction is formed. That is, the stator cores 22 are arranged side by side and the bobbins 44 are fitted. Specifically, the stator cores 22 are connected by fitting the convex portions 47a to the concave portions 47b. In this case, the flange portions 47 of the adjacent stator cores 22 (bobbins 44) are connected in a liquid-tight state by fitting the convex portions 47a and the concave portions 47b.

  The plurality of stator cores 22 are connected in an annular shape as shown in FIG. 2 by fitting the bobbins 44 of the adjacent stator cores 22 together. In this example, the convex portion 47a and the concave portion 47b of the bobbin 44 correspond to the connecting portion of the present invention.

  The pair of support members 26 are disk-shaped members made of a non-magnetic material (such as austenitic stainless steel or aluminum) and have the same configuration.

  The support member 26 has an outer diameter dimension equivalent to an inner peripheral surface (an inner peripheral surface other than the small-diameter portion 7a) of the cylindrical housing 7 which will be described later, and a shaft hole 30 through which the rotary shaft 10 penetrates at the center. Is formed. A boss portion 32 protrudes outwardly on the surface of the support member 26 facing the rotor main bodies 12A and 12B so as to surround the shaft hole 30, and a bearing 28 is provided in the boss portion 32. Is press-fitted.

  Each support member 26 is provided so as to sandwich an annularly connected stator core 22 (hereinafter referred to as “stator core connection body” for convenience) from both sides in the axial direction. More specifically, the support member 26 includes a plurality of window portions 34 having a shape corresponding to the core body 40 around the shaft hole 30. On the other hand, as shown in FIG. 4, the core body 40 of the stator core 22 is provided with a tooth portion 40 a that protrudes outward in the axial direction from the bobbin 44, and the tooth portion 40 a fits into the window portion 34. Thus, each support member 26 is overlapped on both sides of the stator core coupling body. As described above, the teeth 40a of the core body 40 are fitted into the windows 34 of the support members 26, so that the end surfaces of the core bodies 40 of the stator cores 22 face the rotor bodies 12A and 12B through the windows 34. The stator cores 22 are positioned with respect to the support member 26.

  As shown in FIG. 4, the inner peripheral surface of the window portion 34 of the support member 26 and the outer peripheral surface of the tooth portion 40 a of the core body 40 are tapered surfaces, whereby the stator core coupling body (stator core 22) is formed. When sandwiched from both sides, the teeth 40a are guided by the tapered surface of the window 34 while being guided into the window 34 along the tapered surface, and the stator core 22 and the support member 26 are positioned by this guidance. In this example, the tapered surface of the window portion 34 corresponds to a pressing portion of the present invention.

  In addition, the said sealing member 24 which seals between each support member 26 and a stator core coupling body is pinched | interposed between each support member 26 and a stator core coupling body. The seal member 24 is a circular plate-like member formed of, for example, rubber or synthetic resin, and similarly to the support member 26, a shaft hole 24a is formed at the center thereof, and the shaft hole 24a is formed around the shaft hole 24a. A plurality of window portions 24b having a shape corresponding to the core body 40 of each stator core 22 are formed. That is, the core body 40 of each stator core 22 is fitted to the window portion 34 of the support member 26 through the window portion 24 b of the seal member 24.

  The inner cylinder member 20 is disposed inside the stator core coupling body. The inner cylinder member 20 is formed of a nonmagnetic material (austenitic stainless steel, aluminum, or the like) like the support member 26. As shown in FIG. 3, the inner cylinder member 20 is disposed between the pair of support members 26, and is fixed to each support member 26 via a seal member 24 with a bolt B.

  The housing 6 includes a cylindrical housing 7 to which the rotor 2 and the stator 4 are assembled, and a pair of disk-shaped end covers 8 that closes both axial ends of the cylindrical housing 7.

  As shown in FIG. 3, a small-diameter portion 7a whose inner diameter is set smaller than other portions is formed inside the cylindrical housing 7 and in the central portion in the axial direction. In the small-diameter portion 7a, The stator 4 is assembled. Specifically, the stator core connection body (stator core 22) is disposed inside the small diameter portion 7a, and the pair of support members 26 are overlapped so as to sandwich the stator core connection body and the small diameter portion 7a from both sides in the axial direction. In this state, the support members 26 are fixed to the small diameter portion 7a by bolts B from both axial sides.

  Then, the rotating shaft 10 of the rotor 2 is inserted into the bearing 28 of each support member 26 so as to pass through the center of the stator 4 assembled to the cylindrical housing 7 (small diameter portion 7a) and is prevented from coming off. Has been. Thereby, the rotor 2 is rotatably supported by the stator 4.

  A shaft hole 8a is formed at the center of each end cover 8, and the rotary shaft 10 of the rotor 2 is led out of the housing 6 through the shaft hole 8a.

  In the rotating electrical machine 1A configured as described above, an annular closed space in plan view is formed inside the housing 6 by the support members 26 of the stator 4, the inner cylinder member 20, and the housing 6 (small diameter portion 7a). Has been. A cooling liquid introduction port IP and a lead-out port OP are provided in the cylindrical housing 7 at positions opposite to each other in the radial direction across the closed space. Coolant is supplied. In other words, in this rotating electrical machine 1A, the coolant is circulated to the closed space by introducing the coolant from the introduction port IP to the closed space while being led to the outside through the lead-out port OP. It is comprised so that 23 may be cooled. In this example, the introduction port IP and the lead-out port OP correspond to the coolant supply / discharge portion of the present invention.

  The configuration of the rotating electrical machine 1A according to the first embodiment has been described above. The rotating electrical machine 1A has the following advantages.

  According to the rotating electrical machine 1A, the stator core 22 is supported from both axial sides of the rotary shaft 10 by the pair of support members 26 fixed to the housing 6 (cylindrical housing 7). The support rigidity of the rotor 2 can be increased as compared with the conventional rotating electric machine (Patent Document 1 described in the background art) in which the stator core (fixed iron core) is supported by the iron core holding member. Therefore, it is possible to avoid inconvenience that the stator 4 is distorted and affects the torque performance.

  Further, in this rotating electrical machine 1A, a closed space is formed by each support member 26, the inner cylinder member 20, and the cylindrical housing 7 (small diameter portion 7a), and the coil 23 is cooled by introducing a coolant into the closed space. It is the composition which becomes. Therefore, according to the rotating electrical machine 1A, the coil 23 can be cooled with a rational configuration in which the closed space is formed using the support members 26 that support the stator core 22 and the cylindrical housing 7 (small diameter portion 7a). There is also an advantage.

  In this case, in this rotating electrical machine 1A, the flanges 47 formed on the bobbin 44 are fitted in a liquid-tight state so that the stator core 22 is connected in an annular shape, whereby each support member 26 and the coil 23 are connected to each other. Between the flange portion 47 and each support member 26, a seal member 24 is interposed. Therefore, according to this rotating electrical machine 1A, the leakage of the coolant flowing in the closed space to the rotor 2 side can be highly prevented by the flange portion 47 and the seal member 24 of each bobbin 44. There is also.

  Further, in this rotating electrical machine 1A, a window portion 34 that exposes the core body 40 (tooth portion 40a) of the stator core 22 to the rotor 2 side is formed in the support member 26, and the teeth portion 40a is formed by the window portion 34 (tapered surface). As a result, the stator core 22 is positioned on the support member 26 by the window 34. Therefore, according to this rotating electrical machine 1A, there is also an advantage that the support member 26 and the stator core 22 can be appropriately positioned without providing a dedicated positioning member.

  The rotary electric machine 1A according to the first embodiment has been described above, but the following configuration (modification) can be applied to the rotary electric machine 1A.

  (1) In the above embodiment, the stator 4 is assembled to the cylindrical housing 7 by fixing each support member 26 to the small diameter portion 7a, but as shown in FIG. An outer cylinder member 36 is provided which is interposed in the portion and is fixed to each support member 26 by a bolt B. As shown in the figure, in a state where the stator 4 is fitted in the cylindrical housing 7, the outer cylinder member 36 is provided. May be fixed to the cylindrical housing 7 with bolts B. In this case, the small diameter portion 7a of the cylindrical housing 7 is not necessary.

  According to such a structure, there exists an advantage that the assembly | attachment property of the rotor 2 with respect to the housing 6 (cylindrical housing 7) improves. That is, in the configuration of the rotating electrical machine 1A shown in FIG. 3 and the like, it is necessary to sandwich the small diameter portion 7a of the cylindrical housing 7 from both sides in the axial direction by the support members 26 and fix the outer cylindrical member 36 to the small diameter portion 7a. The stator 4 cannot be assembled into the cylindrical housing 7 in a state where the stator 4 is completed in advance. For this reason, it is necessary to insert the stator 4 into the cylindrical housing 7 with one of the support members 26 removed, and to insert the other support member 26 into the cylindrical housing 7 from the opposite side. On the other hand, according to the configuration shown in FIG. 6, the stator 4 can be inserted into the cylindrical housing 7 and fixed in a state where the stator 4 is completed in advance. Therefore, it is not necessary to assemble the stator 4 in the cylindrical housing 7, and the assembling property of the rotor 2 to the housing 6 (cylindrical housing 7) is improved accordingly.

  (2) A guide plate for guiding the coolant to flow along a predetermined path may be provided in the closed space inside the stator 4. For example, as shown in FIG. 7, when the coolant passes between adjacent coils 23, the coolant flows in the circumferential direction while meandering in an annular closed space as indicated by an arrow in FIG. As described above, the guide plates 38a and 38b may be provided. According to such a configuration, the coolant can be surely passed through each coil 23. Furthermore, since the closed space is narrowly partitioned by the guide plates 38a and 38b, the flow path of the coolant is narrowed, so that the flow rate of the coolant flowing through the flow path is also increased. Therefore, the coil 23 can be efficiently cooled.

  However, if the guide plates 38a and 38b are provided on the inner cylinder member 20 and the cylindrical housing 7 (small diameter portion 7a) with the configuration of the stator 4 shown in FIG. 3, actual assembly becomes difficult. Therefore, when the guide plates 38a and 38b are provided, after adopting the configuration of FIG. 6 described in the above-described modification (1), as shown in FIG. Guide plates 38a and 38b are provided, and as shown in FIG. 8, it is preferable that the outer cylinder member 36 has a divided structure (divided pieces 36a to 36c). In this case, the inner cylinder member 20 is provided with a guide plate 38a that guides the flow of the coolant toward the radially outer side, while the outer cylinder member 36 (divided pieces 36a to 36c) flows toward the radially inner side. Guidance plates 38b to be guided are respectively provided on the outer cylinder member 36, and the arrangement of the guidance plates 38a and 38b is set so that the guide plates 38a of the inner cylinder member 20 and the guide plates 38b of the outer cylinder member 36 are alternately arranged in the circumferential direction. To do. According to such a configuration, the stator 4 can be assembled by the following procedure. First, adjacent stator cores 22 are connected while making each stator core 22 approach the inner cylinder member 20 from the outside in the radial direction (constituting a stator core connection body), and at the time of this connection, each guide plate 38a of the inner cylinder member 20 is connected. Is inserted between predetermined coils 23 adjacent to each other. Thereafter, the divided pieces 36a to 36c (the outer cylinder member 36) are brought close to and combined with the stator core connection body, and at this time, the guide plates 38b of the divided pieces 36a to 36c are adjacent to each other. Between the two coils 23. And after fixing adjacent division piece 36a-36c with fixing means, such as a volt | bolt, the seal member 24 and the supporting member 26 are assembled | attached to a stator core coupling body. Thus, the stator 4 having a coolant flow path as shown in FIG. 7 is formed.

  If the stator core 22 as shown in FIG. 9 is used, the stator 4 can be configured without the outer cylindrical member 36 having the divided structure as described above. That is, in the stator core 22 shown in the figure, of the two flange portions 47 formed on the bobbin 44, the width dimension of the flange portion 47 on one side (the horizontal dimension in the drawing) is the same as that of the flange portion 47 on the other side. It is set shorter than the width dimension. For example, the shorter flange portion 47 is set to a width dimension equivalent to the width dimension of the coil 23. Further, the bobbin 44 is configured to be connectable by fitting flanges 47 having different lengths in the axial direction.

  As shown in FIG. 9, the stator 4 having the stator core 22 shown in FIG. 9 is assembled with respect to the gap formed between the inner cylinder member 20 and the outer cylinder member 36 which are positioned in advance. Are sequentially connected in the circumferential direction while being alternately inserted from different sides in the axial direction. Accordingly, the stator core coupling body is configured while inserting the guide plates 38 a and 38 b provided on the inner cylinder member 20 and the outer cylinder member 36 between the predetermined coils 23 adjacent to each other. Then, by assembling the seal member 24 and the support member 26 to the stator core coupling body or the like, the stator 4 having a coolant flow path as shown in FIG. 7 can be configured. According to this configuration, it is necessary to pay attention to the direction of the stator core 22 when the stator 4 is assembled, but the configuration of the stator 4 can be simplified because the outer cylinder member 36 does not need to be divided.

  (3) As shown to Fig.10 (a), (b), the teeth part 40a of the core main body 40 of the stator core 22 is formed by the level | step-difference part (side surface of each laminated body g1-g6) formed in the side surface. The step may be filled with a filling member made of a resin material. In FIG. 10A, for the sake of convenience, a portion where the step is filled with resin is indicated by hatching.

  According to such a configuration, since flat surfaces are formed on both sides of the tooth portion 40a and the step portion is apparently eliminated, the contours of the window portion 34 of the support member 26 and the window portion 24b of the seal member 24 are also stepped. Therefore, it is possible to suppress the occurrence of processing defects in the window portions 24b and 34. Therefore, for example, it is possible to suppress the occurrence of trouble such that the seal member 24 and the support member 26 cannot be assembled to the stator core coupling body due to the defective shape of the window portions 24b and 34 (stepped portions). The filling member may be a separate body from the bobbin 44. However, if the mold is designed in advance so that the stepped portions of the laminates g1 to g6 are filled with resin at the time of the insert molding of the stator core 22, the insert It can be molded integrally with the bobbin 44 by molding.

(Second Embodiment)
Next, a rotating electrical machine according to a second embodiment of the present invention will be described. In the following description, portions common to the first embodiment are denoted by the same reference numerals, description thereof is omitted, and differences from the rotating electrical machine 1A of the first embodiment are mainly described.

  FIG. 11 is an exploded perspective view of the rotating electrical machine according to the second embodiment. In the first embodiment, in the rotating electrical machine 1A, the rotor 2 includes two rotor main bodies 12A and 12B, and the stator 4 is interposed between the rotor main bodies 12A and 12B. Although the rotating electrical machine 1B of the second embodiment is an electric machine, the stator 4A, 4B (the first stator 4A, the second stator 4B and the stator 4B) are provided on both sides of one rotor body 12 of the rotor 2, as shown in FIG. 1 rotor and 2 stator type axial gap type rotating electrical machines. Therefore, for the rotor 2, permanent magnets 16 are provided on both surfaces of the rotor body 12 (rotor disk 14).

  As shown in FIGS. 12 and 13, the first stator 4A has an inner cylinder member 20 and an outer cylinder member 36, as in the rotating electrical machine 1A shown in FIG. 6 of the first embodiment. Is provided with a stator core coupling body (stator core 22).

  A support member 26 is fixed via a seal member 24 on one side of the stator core coupling body (stator core 22) or the like, specifically on the rotor body 12 side. This is the same as in the first embodiment, but in the second embodiment, the back yoke 29 is fixed to the other side of the stator core coupling body and the like, and the base member 50 is fixed to the outside thereof.

  The back yoke 29 is formed by laminating and integrating a plurality of electromagnetic steel plates pressed into a disk shape. The back yoke 29 is formed with a shaft hole 29a of the rotary shaft 10 at the center thereof, and a plurality of core insertion portions 29b arranged at equal intervals around the shaft hole 29a. The back yoke 29 is overlaid on the stator core coupling body and the like with the teeth 40a of the core body 40 fitted in each core insertion portion 29b. In this state, the back yoke 29 is bolted to the inner cylinder member 20 and the outer cylinder member 36. It is fixed with B.

  The base member 50 is a disk-shaped member made of a nonmagnetic material such as stainless steel, and is fixed to the back yoke 29 with a bolt (not shown). The base member 50 also serves as an end cover of the housing 6, and a shaft hole 50 a of the rotating shaft 10 is formed at the center. Therefore, in 2nd Embodiment, the housing 6 is comprised only with the cylindrical housing 7, and the end cover 8 for exclusive use is not provided.

  As shown in FIG. 13, the first stator 4 </ b> A is fitted inside the cylindrical housing 7 from one side thereof, and the outer cylinder member 36 is fixed to the cylindrical housing 7 with a bolt B, whereby the cylindrical housing 7. It is assembled to. As shown in the figure, the outer diameter of the base member 50 is set so as to contact the end surface of the cylindrical housing 7. Thereby, the first stator 4A is positioned in the axial direction with respect to the cylindrical housing 7, and the opening of the cylindrical housing 7 is closed.

  As shown in FIG. 13, the first stator 4A has a small diameter of the cylindrical housing 7 as shown in FIG. 14, instead of the outer cylinder member 36 being fixed to the cylindrical housing 7 with bolts B. You may make it fix with the volt | bolt B to the part 7a.

  Although the first stator 4A has been described here, the second stator 4B has the same configuration. Although not shown, the second stator 4B is fitted into the cylindrical housing 7 from the other side (the side opposite to the first stator 4A) and fixed to the cylindrical housing 7 in the same manner as the first stator 4A. Has been.

  The rotor 2 is arranged such that the rotor body 12 is interposed between the stators 4A, 4B assembled to the housing 6. The rotating shaft 10 passes through the centers of the stators 4A and 4B and is inserted into the bearings 28 of the respective support members 26 to be prevented from coming off. Thereby, the rotor 2 is rotatably supported by the stators 4A and 4B.

  According to the rotary electric machine 1B of the second embodiment as described above, the stator core 22 (stator core coupling body) is supported by the back yoke 29 and the base member 50 on one side in the axial direction and supported by the support member 26 on the other side. As a result, the support member 26 and the like are supported by the housing 6 while being sandwiched from both sides in the axial direction. That is, in this example, the back yoke 29, the base member 50, and the support member 26 function as a pair of support members of the present invention. Therefore, the support rigidity of the stators 4A and 4B is relatively high like the rotating electrical machine 1A of the first embodiment, and the occurrence of distortion in the stators 4A and 4B is effectively suppressed. Therefore, in the rotating electrical machine 1B of the second embodiment, in the same way as the rotating electrical machine 1A of the first embodiment, it is possible to avoid inconvenience that the torque performance is adversely affected due to the distortion of the stators 4A and 4B. It becomes possible.

  In the rotating electrical machine 1B, a closed space is formed by the support member 26, the back yoke 29, the inner cylinder member 20, and the outer cylinder member 36, and the coil 23 is cooled by introducing a coolant into the closed space. It is the composition which becomes. Therefore, similarly to the rotating electrical machine 1A of the first embodiment, the coil 23 is configured with a rational configuration in which the closed space is formed by using the member for supporting the stator core, that is, the support member 26 and the back yoke 29. There is also an advantage that it can be cooled. In the rotating electrical machine 1B of the second embodiment, no sealing member is provided between the back yoke 29 and the stator core 22 and the like from the viewpoint of magnetic flux formation, but if acceptable, the sealing member from the viewpoint of preventing liquid leakage. It is desirable to provide.

  In addition, as shown in FIGS. 12 and 13, the back yoke 29 is replaced with one in which a plurality of electromagnetic steel plates pressed in a disk shape are laminated and integrated, as shown in FIGS. 15 (a) and 15 (b). Alternatively, a magnetic steel sheet wound in a spiral shape may be applied, and this may be bonded and fixed to the first stator 4A with a non-conductive adhesive 29c. According to this configuration, the magnetic flux flow can be made smooth without providing a gap between the electromagnetic steel sheets in the magnetic flux flow direction.

  Although illustration is omitted, the rotating electrical machine 1B of the second embodiment can also employ the configurations of FIGS. 7 to 10 described in the modification of the first embodiment.

  As mentioned above, although embodiment of this invention was described, rotary electric machine 1A, 1B which concerns on 1st, 2nd embodiment mentioned above is a type | mold rotary electric machine (rotary electric machine to which the stator core of this invention was applied) which concerns on this invention. The specific configuration of the stator core and the rotating electrical machines 1A and 1B can be appropriately changed without departing from the gist of the present invention.

1A, 1B Axial gap type rotating electrical machine 2 Rotor 4, 4A, 4B Stator 6 Housing 7 Cylindrical housing 10 Rotating shaft 12, 12A, 12B Rotor body 22 Stator core 23 Coil 26 Support member

Claims (4)

A rotor comprising a rotating shaft and a rotor body rotating with the rotating shaft;
A stator disposed in the axial direction of the rotating shaft so as to face the rotor body;
A cylindrical housing in which the rotor and the stator are accommodated,
The stator is interposed between a plurality of stator cores arranged in the circumferential direction, a coil attached to each stator core, a pair of support members that support the stator core from both sides in the axial direction, and the pair of support members. An inner cylinder member that forms an outer wall of the stator by being fixed to the support member, and an inner cylinder member that is interposed between the pair of support members at a position inside the plurality of stator cores. The coil is disposed in a closed space surrounded by a member, the pair of support members, and the outer cylinder member, and is inserted into the housing so that the outer cylinder member is fitted inside the inner peripheral surface thereof. In this state, the outer cylinder member is fixed to the housing, and is assembled to the housing via the outer cylinder member,
The axial gap type rotating electrical machine further includes:
A coolant supply / discharge section capable of supplying and discharging coolant for cooling the coil with respect to the closed space;
A seal member laminated on the support member to keep the closed space in a liquid-tight state,
Each stator core includes a core main body formed of a magnetic material and a bobbin formed of an insulating material and fixed on the outer peripheral surface of the core main body, and the coil is mounted on the outer peripheral surface of the bobbin. Is,
The bobbin includes flanges on both sides of the coil in the axial direction that extend along the support member and can connect bobbins of adjacent stator cores in a fluid-tight state.
The plurality of stator cores have an annular shape by connecting bobbins of adjacent stator cores via the flange portion,
Of the two flanges on both sides of the coil of the bobbin, the width dimension in the circumferential direction of the collar part on one side is set shorter than the width dimension in the circumferential direction of the collar part on the other side. Axial gap type rotating electrical machine. In the axial gap type rotating electrical machine according to claim 1 ,
Of the pair of support members, the support member on the side facing the rotor is formed with a window portion that exposes the core body to the rotor side, and the window portion engages with the core body from the outside. An axial gap type rotating electrical machine characterized in that a pressing portion for positioning the core body is formed while pressing the core body. In the axial gap type rotating electrical machine according to claim 1 or 2 ,
An axial gap type rotating electrical machine characterized in that an induction plate is provided in the closed space for guiding the coolant to flow in the closed space along a predetermined path. In the axial gap type rotating electrical machine according to claim 3 ,
The axial gap type rotating electrical machine, wherein the guide plate is arranged so that the coolant flows in the circumferential direction while meandering in the closed space via adjacent coils.

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