Production method of axial gap motor

Abstract

To provide a production method of an axial gap motor that can suppress a great stress applied to a central member.SOLUTION: A production method of an axial gap motor (10) comprises: a stator body (22) arranged in the center of a rotary shaft (31) in the axial direction; a first rotor body (35) arranged so as to face the stator body in a first direction of the axial direction; and a second rotor body (43) arranged so as to face the stator body in a second direction, the opposite direction of the first direction. The production method includes an assembly step in which a central member (20) with the stator body, a first member (30) with the first rotor body, and a second member (40) with the second rotor body can be relatively displaced so that the first rotor body and the second rotor body can get closer to the stator body at the same time.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a manufacturing method for an axial gap motor. [Background technology]

[0002] Conventionally, there is an axial gap motor in which a stator and a rotor are arranged to face each other in the axial direction of a rotating shaft. An axial gap motor includes a stator body part arranged in the center in the axial direction, and a first rotor body part and a second rotor body part arranged to sandwich the stator body part in the axial direction (see, for example, Patent Document 1). In a method of manufacturing such an axial gap motor, for example, a central member is manufactured by first fixing a cylindrical housing to the outer periphery of the stator body part. Then, the housing of the central member is moved to bring the stator body part closer to the first rotor body part from above. Then, the second rotor body part is brought closer to the stator body part from above. In this way, the first rotor body part and the second rotor body part are arranged to sandwich the stator body part. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6365516 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-mentioned manufacturing method of an axial gap motor, when the stator body is brought close to the first rotor body from above, a large magnetic attraction force acts on the stator body in a direction approaching the first rotor body. This may cause a large stress to be applied to, for example, a fixed portion between the stator body and the housing, which is a central member having the stator body. This may cause, for example, damage to the fixed portion between the stator body and the housing. Therefore, a strong fixing structure is required for the fixed portion between the stator body and the housing, which may cause the central member to become heavy, etc.

[0005] The present disclosure has been made to solve the above-mentioned problems, and its purpose is to provide a manufacturing method for an axial gap motor that can prevent large stress from being applied to the central member. [Means for solving the problem]

[0006] A manufacturing method for an axial gap motor (10) that solves the above-mentioned problems includes a stator body portion (22) arranged in the center in the axial direction of a rotating shaft (31), a first rotor body portion (35) arranged to face the stator body portion in a first direction in the axial direction, and a second rotor body portion (43) arranged to face the stator body portion in a second direction that is the opposite direction to the first direction, and includes an assembly process of relatively moving a central member (20) having the stator body portion, a first member (30) having the first rotor body portion, and a second member (40) having the second rotor body portion so that the first rotor body portion and the second rotor body portion approach the stator body portion simultaneously or gradually approach each other alternately.

[0007] According to this method, in the assembly process, the central member, the first member, and the second member are moved relative to each other, so that the first rotor body and the second rotor body approach the stator body simultaneously or alternately and gradually. Therefore, for example, when the first rotor body is disposed in a position near the stator body, the second rotor body is also disposed in a position near the stator body. Therefore, the stator body is subjected to both a magnetic attraction force in a direction approaching the first rotor body and a magnetic attraction force in a direction approaching the second rotor body. Therefore, for example, it is possible to prevent a large magnetic attraction force from acting on the stator body only in the first direction. This makes it possible to suppress, for example, a large stress from being applied to the central member having the stator body. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic cross-sectional view of an axial gap motor according to an embodiment. [Diagram 2] 5A to 5C are schematic cross-sectional views for explaining a manufacturing method of the axial gap motor according to the embodiment. [Diagram 3] 5A to 5C are schematic cross-sectional views for explaining a manufacturing method of the axial gap motor according to the embodiment. [Figure 4] 13A to 13C are schematic cross-sectional views for explaining a manufacturing method of an axial gap motor according to another example. [Diagram 5] FIG. 11 is a partially exploded perspective view of an axial gap motor according to another embodiment. [Figure 6] 13 is a schematic side view for explaining a manufacturing method of an axial gap motor according to another example. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of a method for manufacturing an axial gap motor will be described with reference to the drawings. Note that in the drawings, for the sake of convenience, some of the configuration may be exaggerated or simplified. Also, the dimensional ratios of each part may differ from the actual ones.

[0010] (Configuration of axial gap motor 10) 1 and 2, the axial gap motor 10 is formed by assembling a central member 20, a first member 30, a second member 40, etc. Note that in Figs. 1 and 2, only a cross section on one side of the axial gap motor 10 is shown diagrammatically, with the central axis Z of the axial gap motor 10 as the boundary.

[0011] (Configuration of central member 20) The central member 20 has a cylindrical housing 21 and a stator main body 22. The housing 21 has a pair of locking protrusions 21a. The pair of locking protrusions 21a are provided on the housing 21 at a distance from each other in the axial direction. The locking protrusions 21a protrude radially inward from the entire circumference of the inner circumferential surface of the housing 21.

[0012] The stator main body 22 has a plurality of stator cores 23 arranged in the circumferential direction, coils 24 wound around each of the stator cores 23, and a pair of plate-shaped brackets 25. The pair of brackets 25 are fixed to both ends of the plurality of stator cores 23 in the axial direction. The pair of brackets 25 are disposed so as to sandwich the pair of locking protrusions 21a. In this way, the brackets 25 fix the outer periphery of the stator main body 22 to the housing 21.

[0013] (Configuration of the first member 30) The first member 30 has a rotating shaft 31, a first core member 32, a plurality of first magnets 33, and a first end plate 34. The rotating shaft 31 has a flange portion 31a extending radially outward. The flange portion 31a has a flange fixing hole 31b and a flange temporary fixing hole 31c penetrating in the axial direction. In this embodiment, the flange fixing hole 31b and the flange temporary fixing hole 31c are arranged side by side in the radial direction. Furthermore, a plurality of the flange fixing holes 31b and the flange temporary fixing holes 31c are arranged in the circumferential direction.

[0014] The first core member 32 has a first rotor core portion 32a having an annular shape, a first cylindrical portion 32b extending from the inner circumference of the first rotor core portion 32a in the axial direction, and a first inner extension portion 32c extending from the tip of the first cylindrical portion 32b in the radial direction inward. The first inner extension portion 32c has a first fixing hole 32d and a first temporary fixing hole 32e penetrating in the axial direction. In this embodiment, the first fixing hole 32d and the first temporary fixing hole 32e are arranged side by side in the radial direction. In addition, a plurality of the first fixing holes 32d and the first temporary fixing holes 32e are provided in the circumferential direction. In addition, the first rotor core portion 32a has a plurality of first accommodating recesses 32f in the circumferential direction that open in a direction facing the stator main body portion 22. The first magnet 33 is accommodated and fixed in the first accommodating recesses 32f. In this embodiment, the first rotor core portion 32a and the multiple first magnets 33 constitute a first rotor body portion 35. The first rotor body portion 35 is disposed so as to face the stator body portion 22 in a first direction (downward in FIG. 1) in the axial direction. The first inner extension portion 32c has a first central hole 32g through which the rotating shaft 31 passes. The rotating shaft 31 is fixed to the first core member 32 while passing through the first central hole 32g. In the state in which the first member 30 is a single member, the rotating shaft 31 and the first core member 32 are fixed by a first bolt 36 that passes through the flange temporary fixing hole 31c and the first temporary fixing hole 32e, as shown in FIG. 2. In this embodiment, the first bolt 36 is screwed into a female thread formed in the flange temporary fixing hole 31c.

[0015] The first end plate 34 is formed in a disk shape. The first end plate 34 has a first bearing retaining hole 34a at its center. The rotating shaft 31 is rotatably supported in the first bearing retaining hole 34a via a first bearing 37. The first bearing 37 is a ball bearing having an outer ring, an inner ring, and balls, and the outer ring is fixed to the first bearing retaining hole 34a and the inner ring is fixed to the rotating shaft 31. The outer edge portion of the first end plate 34 is a first abutment portion 34b with which the end of the housing 21 abuts in the axial direction.

[0016] (Configuration of the second member 40) The second member 40 includes a second core member 41 and a plurality of second magnets 42. The second core member 41 has a second rotor core portion 41a having an annular shape, a second cylindrical portion 41b extending from the inner circumference of the second rotor core portion 41a in the axial direction, and a second inner extension portion 41c extending from the tip of the second cylindrical portion 41b in the radial direction inward. The second inner extension portion 41c has a second fixing hole 41d and a drawing hole 41e penetrating in the axial direction. In this embodiment, the second fixing hole 41d and the drawing hole 41e are arranged side by side in the radial direction. In addition, a plurality of the second fixing holes 41d and the drawing holes 41e are provided in the circumferential direction. In addition, the second rotor core portion 41a has a plurality of second accommodating recesses 41f in the circumferential direction that open in a direction facing the stator body portion 22. The second magnet 42 is accommodated and fixed in the second accommodating recess 41f. In this embodiment, the second rotor core portion 41a and the plurality of second magnets 42 constitute a second rotor body portion 43. The second rotor body 43 is disposed to face the stator body 22 in a second direction (upward in FIG. 1) that is opposite to the first direction. The second inner extension 41c has a second central hole 41g through which the rotating shaft 31 passes. The second central hole 41g is formed so that the rotating shaft 31 can be smoothly inserted therethrough. As shown in FIG. 1, the second core member 41, the first core member 32, and the rotating shaft 31 are fixed by a second bolt 44 that passes through the second fixing hole 41d, the first fixing hole 32d, and the flange fixing hole 31b. In this embodiment, the second bolt 44 is screwed into a female thread formed in the flange fixing hole 31b.

[0017] As shown in FIG. 1, the axial gap motor 10 includes a second end plate 50. The second end plate 50 is formed in a disk shape. The second end plate 50 has a second bearing holding hole 50a at its center. The rotating shaft 31 is rotatably supported in the second bearing holding hole 50a via a second bearing 51. The second bearing 51 is a ball bearing having an outer ring, an inner ring, and balls, and the outer ring is fixed to the second bearing holding hole 50a and the inner ring is arranged to support the rotating shaft 31. The inner ring of the second bearing 51 is formed so that the rotating shaft 31 can be smoothly inserted therethrough. The outer edge of the second end plate 50 is a second abutment portion 50b with which the end of the housing 21 abuts in the axial direction.

[0018] Next, a method for manufacturing the axial gap motor 10 configured as above will be described. The manufacturing method of the axial gap motor 10 includes an "assembly process", a "core fixing process", a "removal process", and a "closing process".

[0019] In the assembly process, the central member 20, the first member 30, and the second member 40 are moved relative to each other so that the first rotor body portion 35 and the second rotor body portion 43 approach the stator body portion 22 at the same time.

[0020] More specifically, as shown in FIG. 2, in the assembly process of this embodiment, the first member 30 and the second member 40 are moved simultaneously at the same speed while the central member 20 is fixed so as not to move (see the white arrows in FIG. 2).

[0021] Specifically, for example, first, the housing 21 of the central member 20 is held by the central holding part 61 of the manufacturing device 60. In addition, the first end plate 34 of the first member 30 is held by the first holding part 62 of the manufacturing device 60, and the second core member 41 of the second member 40 is held by the second holding part 63 of the manufacturing device 60. The second holding part 63 of this embodiment is disposed above the first holding part 62, and has a claw part capable of suspending and supporting the second member 40 by engaging with, for example, the engaging parts 41h provided on the inner and outer periphery of the second core member 41. Then, the actuators connected to the first holding part 62 and the second holding part 63 are driven to move the first member 30 and the second member 40 simultaneously at the same speed.

[0022] In this assembly process, the rotating shaft 31 is inserted through the second central hole 41g in a non-press-fit state. In the assembly process, the first member 30 is moved until the first abutment portion 34b of the first end plate 34 abuts against the end of the housing 21. In addition, in the assembly process, the second member 40 is moved until the second cylindrical portion 41b and the second inner extension portion 41c of the second core member 41 abut against the first cylindrical portion 32b and the first inner extension portion 32c of the first core member 32. In the assembly process of this embodiment, the first abutment portion 34b is set to abut against the housing 21 immediately before the second core member 41 abuts against the first core member 32. In addition, in the assembly process of this embodiment, the distance between the first rotor body portion 35 and the stator body portion 22 and the distance between the second rotor body portion 43 and the stator body portion 22 are set to always be the same as much as possible.

[0023] 3, in the core fixing process, the second core member 41 is fixed to the rotating shaft 31. More specifically, in the core fixing process, the second core member 41, the first core member 32, and the rotating shaft 31 are fixed together by the second bolt 44 that passes through the second fixing hole 41d, the first fixing hole 32d, and the flange fixing hole 31b.

[0024] Next, in the removal step, the first bolt 36 is removed from the first temporary fixing hole 32e and the flange temporary fixing hole 31c through the removal hole 41e. Next, in the closing step, the second end plate 50 is attached to the housing 21 to close the inside of the housing 21. That is, in the closing step, the second end plate 50 is moved until the second abutment portion 50b of the second end plate 50 abuts against the end of the housing 21. In this closing step, the rotating shaft 31 is inserted into the second bearing 51 in a non-press-fit state. In this manner, the manufacture of the axial gap motor 10 is completed.

[0025] Next, the effects of the above embodiment will be described below. (1) In the assembly process, the central member 20, the first member 30, and the second member 40 are moved relative to each other, so that the first rotor body portion 35 and the second rotor body portion 43 approach the stator body portion 22 at the same time. Therefore, for example, when the first rotor body portion 35 is disposed in a position adjacent to the stator body portion 22, the second rotor body portion 43 is also disposed in a position adjacent to the stator body portion 22. Therefore, the stator body portion 22 is subjected to both a magnetic attraction force in a direction approaching the first rotor body portion 35 and a magnetic attraction force in a direction approaching the second rotor body portion 43. Therefore, for example, it is possible to prevent a large magnetic attraction force from acting on the stator body portion 22 only in the first direction.

[0026] This can prevent, for example, a large stress from being applied to the central member 20 having the stator body 22. More specifically, it can prevent a large stress from being applied to the fixed portion between the stator body 22 and the housing 21. This can, for example, reduce the thickness of the pair of brackets 25. Also, for example, it can prevent the stator body 22 from coming off the housing 21 even if the stator body 22 and the housing 21 are not screwed together. As a result, for example, it is possible to reduce the weight of the axial gap motor 10.

[0027] (2) In the assembly process, the first member 30 and the second member 40 are moved simultaneously at the same speed while the central member 20 is fixed so as to be immovable. In this way, for example, the assembly process can be performed by making the two actuators of the manufacturing device 60 have the same configuration and move them under the same control. This makes manufacturing easier. Also, for example, the maximum speed can be kept small compared to when the central member 20 and the second member 40 are moved simultaneously while the first member 30 is fixed so as to be immovable, and the second member 40 is moved at twice the speed of the central member 20. When the second member 40 is moved at twice the speed of the central member 20, the maximum speed becomes high, which makes it difficult to, for example, stop control of the second member 40, but this can be avoided. This makes manufacturing easier.

[0028] (3) In the assembly process, the rotating shaft 31 is inserted into the second central hole 41g without being pressed in, so that the second member 40 can be moved smoothly and accurately relative to the first rotor body 35. This allows the stator body 22 to effectively exert both the magnetic attractive force in the direction approaching the first rotor body 35 and the magnetic attractive force in the direction approaching the second rotor body 43.

[0029] (4) In the assembly process, the first core member 32 and the rotating shaft 31 are fixed by the first bolt 36 that penetrates the first temporary fixing hole 32e and the flange temporary fixing hole 31c. Then, in the core fixing process, the second core member 41, the first core member 32, and the rotating shaft 31 are fixed by the second bolt 44 that penetrates the second fixing hole 41d, the first fixing hole 32d, and the flange fixing hole 31b. Therefore, the second core member 41, the first core member 32, and the rotating shaft 31 can be firmly fastened together by the single second bolt 44. Then, after the core fixing process, a removal process is provided in which the first bolt 36 is removed from the first temporary fixing hole 32e and the flange temporary fixing hole 31c through the removal hole 41e, so that the first bolt 36 that is no longer needed can be removed. Therefore, for example, the weight of the axial gap motor 10 can be reduced.

[0030] This embodiment can be modified as follows: This embodiment and the following modifications can be combined with each other to the extent that there is no technical contradiction. In the assembly process of the above embodiment, the first member 30 and the second member 40 are moved simultaneously at the same speed while the central member 20 is fixed so as not to move, but this is not limiting.

[0031] 4, in the assembly process, the central member 20 and the second member 40 may be moved simultaneously with the first member 30 fixed so as to be immovable, and the second member 40 may be moved at twice the speed of the central member 20. In this example, the actuators connected to the central holding part 61 and the second holding part 63 are driven to move the central member 20 and the second member 40 simultaneously, and the second member 40 is moved at twice the speed of the central member 20 (see the white arrows in FIG. 4).

[0032] Even in this way, the same effects as those of the above-mentioned embodiment (1), (3), and (4) can be obtained. In addition, in this way, for example, the assembly process can be performed by moving two actuators of the manufacturing device in the same direction (for example, downward in FIG. 4). This makes manufacturing easier.

[0033] In the above embodiment, the flange fixing holes 31b and the flange temporary fixing holes 31c, the first fixing holes 32d and the first temporary fixing holes 32e, and the second fixing holes 41d and the extraction holes 41e are arranged side by side in the radial direction, but this is not limited to the above.

[0034] For example, it may be modified as shown in FIG. 5. In this example, the flange fixing holes 31b and the flange temporary fixing holes 31c, the first fixing holes 32d and the first temporary fixing holes 32e, the second fixing holes 41d and the through holes 41e are arranged in a line in the circumferential direction. In this example, the flange fixing holes 31b and the flange temporary fixing holes 31c, the first fixing holes 32d and the first temporary fixing holes 32e, the second fixing holes 41d and the through holes 41e are arranged in a line in a line in the circumferential direction at equal angular intervals of 45°. In this way, for example, it is possible to reduce the radial length of the flange portion 31a, the first inner extension portion 32c, and the second inner extension portion 41c.

[0035] In the above embodiment, the first core member 32 and the second core member 41 are configured to be fixed to a single flange portion 31a of the rotating shaft 31, but this is not limited thereto, and for example, each may be fixed to a different flange portion of the rotating shaft 31. Also, the second core member 41 may be fixed to the rotating shaft 31 via the first core member 32 by being fixed to the first core member 32. In such a case, the manufacturing method of the axial gap motor 10 does not necessarily have to include the punching process of the above embodiment.

[0036] In the assembly process of the above embodiment, the central member 20, the first member 30, and the second member 40 are moved relative to each other so that the first rotor body portion 35 and the second rotor body portion 43 simultaneously approach the stator body portion 22, but this is not limited to the above. For example, in the assembly process, the central member 20, the first member 30, and the second member 40 may be moved relative to each other so that the first rotor body portion 35 and the second rotor body portion 43 gradually approach the stator body portion 22 alternately.

[0037] In the above embodiment, the central member 20 has a cylindrical housing 21, but this is not limited thereto, and may be modified to another configuration as long as it has at least the stator main body 22. The configuration of the stator main body 22 may also be modified. For example, the stator main body 22 may be fixed to the housing 21 in another configuration. For example, the stator main body 22 may be molded with resin.

[0038] In the above embodiment, the first member 30 has the rotating shaft 31, the first core member 32, the multiple first magnets 33, and the first end plate 34, but is not limited to this and may be changed to another configuration as long as it has at least the first rotor body portion 35. In addition, the configuration of the first rotor body portion 35 may also be changed.

[0039] In the above embodiment, the second member 40 has the second core member 41 and the multiple second magnets 42, but is not limited to this and may be changed to another configuration as long as it has at least the second rotor body portion 43. In addition, the configuration of the second rotor body portion 43 may also be changed.

[0040] In the above embodiment, the method for manufacturing the axial gap motor 10 is embodied in such a manner that the stator body portion 22 is sandwiched between the first rotor body portion 35 and the second rotor body portion 43, but is not limited to this.

[0041] For example, the present invention may be embodied in a manufacturing method for an axial gap motor 70 as shown in FIG. 6. The axial gap motor 70 includes a central member 72 having a rotor body portion 71, a first member 74 having a first stator body portion 73, and a second member 76 having a second stator body portion 75. The rotor body portion 71 is fixed to a rotating shaft 77 and is disposed at the center of the rotating shaft 77 in the axial direction. The first stator body portion 73 is disposed to face the rotor body portion 71 in a first direction (rightward in FIG. 6) in the axial direction. The second stator body portion 75 is disposed to face the rotor body portion 71 in a second direction (leftward in FIG. 6) that is opposite to the first direction.

[0042] The manufacturing method of the axial gap motor 70 includes an assembly process. In the assembly process, the central member 72, the first member 74, and the second member 76 are moved relative to each other so that the first stator body portion 73 and the second stator body portion 75 approach the rotor body portion 71 simultaneously or alternately and gradually approach each other.

[0043] In this way, for example, when the first stator body portion 73 is disposed in the vicinity of the rotor body portion 71, the second stator body portion 75 is also disposed in the vicinity of the rotor body portion 71. Therefore, the rotor body portion 71 is subjected to both a magnetic attraction force in a direction approaching the first stator body portion 73 and a magnetic attraction force in a direction approaching the second stator body portion 75. This prevents, for example, a large magnetic attraction force from acting on the rotor body portion 71 only in the first direction.

[0044] This can prevent, for example, a large stress from being applied to the central member 72 having the rotor body 71. In more detail, for example, it can prevent a large stress from being applied to the fixing portion between the rotor body 71 and the rotating shaft 77. Therefore, for example, the fixing structure between the rotor body 71 and the rotating shaft 77 can be simplified.

[0045] Although the present disclosure has been described based on the embodiment, it is understood that the present disclosure is not limited to the embodiment or structure. The present disclosure also includes various modifications and modifications within the equivalent range. In addition, various combinations and forms, and other combinations and forms including only one element, more than one element, or less than one element, are also within the scope and concept of the present disclosure.

[0046] The features of the present invention are as follows. [1] A method for manufacturing an axial gap motor (10) including a stator body portion (22) arranged in the center in the axial direction of a rotating shaft (31), a first rotor body portion (35) arranged to face the stator body portion in a first direction in the axial direction, and a second rotor body portion (43) arranged to face the stator body portion in a second direction that is the opposite direction to the first direction, the method comprising an assembly step of relatively moving a central member (20) having the stator body portion, a first member (30) having the first rotor body portion, and a second member (40) having the second rotor body portion so that the first rotor body portion and the second rotor body portion approach the stator body portion simultaneously or gradually approach each other alternately.

[0047] [2] The method for manufacturing an axial gap motor described in [1], in the assembly process, the first member and the second member are moved simultaneously at the same speed while the central member is fixed so as not to move.

[0048] [3] The method for manufacturing an axial gap motor described in [1], wherein in the assembly process, the central member and the second member are moved simultaneously while the first member is fixed so as to be immovable, and the second member is moved at a speed twice as fast as the speed of the central member.

[0049] [4] The method for manufacturing an axial gap motor described in any one of [1] to [3], wherein the central member has a cylindrical housing (21) to which the outer periphery of the stator main body is fixed.

[0050] [5] The method for manufacturing an axial gap motor according to any one of [1] to [4], wherein the first rotor body portion has a plurality of first magnets (33) in the circumferential direction and a first rotor core portion (32a) to which the plurality of first magnets are fixed, the first member has a first core member (32) having the first rotor core portion and a first central hole (32g), and the rotating shaft passing through the first central hole and fixed to the first core member, the second rotor body portion has a plurality of second magnets (42) in the circumferential direction and a second rotor core portion (41a) to which the plurality of second magnets are fixed, and the second member has a second core member (41) having the second rotor core portion and a second central hole (41g), and the assembling process includes a core fixing process of inserting the rotating shaft into the second central hole in a non-press-fit state, and fixing the second core member to the rotating shaft after the assembling process.

[0051] [6] The method for manufacturing an axial gap motor according to [5], wherein the rotating shaft has a flange portion (31a) extending radially outward, the flange portion having a flange fixing hole (31b) and a flange temporary fixing hole (31c), the first core member has a first fixing hole (32d) and a first temporary fixing hole (32e), and the second core member has a second fixing hole (41d) and a removal hole (41e), and in the assembling process, the first core member and the rotating shaft are fixed by a first bolt (36) passing through the first temporary fixing hole and the flange temporary fixing hole, and in the core fixing process, the second core member, the first core member and the rotating shaft are fixed by a second bolt (44) passing through the second fixing hole, the first fixing hole and the flange fixing hole, and after the core fixing process, a removal process is provided in which the first bolt is removed from the first temporary fixing hole and the flange temporary fixing hole via the removal hole.

[0052] [7] A manufacturing method for an axial gap motor (70) including a rotor body portion (71) arranged in the center in the axial direction of a rotating shaft (77), a first stator body portion (73) arranged to face the rotor body portion in a first direction in the axial direction, and a second stator body portion (75) arranged to face the rotor body portion in a second direction that is the opposite direction to the first direction, the manufacturing method for an axial gap motor comprising an assembly step of relatively moving a central member (72) having the rotor body portion, a first member (74) having the first stator body portion, and a second member (75) having the second stator body portion so that the first stator body portion and the second stator body portion approach the rotor body portion simultaneously or gradually approach each other alternately. [Explanation of symbols]

[0053] Reference Signs List 10...Axial gap motor, 20...Central member, 21...Housing, 22...Stator body portion, 30...First member, 31...Rotary shaft, 31a...Flange portion, 31b...Flange fixing hole, 31c...Flange temporary fixing hole, 32...First core member, 32a...First rotor core portion, 32d...First fixing hole, 32e...First temporary fixing hole, 32g...First central hole, 33...First magnet, 35...First rotor body portion, 36...First bore bolt, 40...second member, 41...second core member, 41a...second rotor core portion, 41d...second fixing hole, 41e...punch hole, 41g...second central hole, 42...second magnet, 43...second rotor body portion, 44...second bolt, 70...axial gap motor, 71...rotor body portion, 72...central member, 73...first stator body portion, 74...first member, 75...second stator body portion, 76...second member, 77...rotating shaft.

Claims

1. A method for manufacturing an axial gap motor (10) including a stator body portion (22) disposed at a center in an axial direction of a rotating shaft (31), a first rotor body portion (35) disposed to face the stator body portion in a first direction in the axial direction, and a second rotor body portion (43) disposed to face the stator body portion in a second direction that is an opposite direction to the first direction, an assembly process for relatively moving a central member (20) having the stator body portion, a first member (30) having the first rotor body portion, and a second member (40) having the second rotor body portion so that the first rotor body portion and the second rotor body portion simultaneously approach the stator body portion, In the assembling step, the central member and the second member are moved simultaneously while the first member is fixed so as to be immovable, and the second member is moved at a speed twice as fast as the speed of the central member. A method for manufacturing an axial gap motor.

2. The central member has a cylindrical housing (21) to which the outer periphery of the stator body is fixed. A method for manufacturing an axial gap motor according to claim 1.

3. A method for manufacturing an axial gap motor (10) comprising: a stator body portion (22) arranged in the center in the axial direction of a rotating shaft (31); a first rotor body portion (35) arranged to face the stator body portion in a first direction in the axial direction; and a second rotor body portion (43) arranged to face the stator body portion in a second direction that is an opposite direction to the first direction, comprising: an assembly process for relatively moving a central member (20) having the stator body portion, a first member (30) having the first rotor body portion, and a second member (40) having the second rotor body portion so that the first rotor body portion and the second rotor body portion simultaneously approach the stator body portion or alternately and gradually approach the stator body portion, The first rotor body portion has a plurality of first magnets (33) arranged in a circumferential direction and a first rotor core portion (32a) to which the plurality of first magnets are fixed, The first member includes a first core member (32) having the first rotor core portion and a first central hole (32g), and the rotating shaft is fixed to the first core member while passing through the first central hole, The second rotor body portion has a plurality of second magnets (42) arranged in a circumferential direction and a second rotor core portion (41 a) to which the plurality of second magnets are fixed, The second member includes a second core member (41) having the second rotor core portion and a second central hole (41g), In the assembling step, the rotating shaft is inserted into the second central hole in a non-press-fit state, a core fixing step of fixing the second core member to the rotating shaft after the assembling step, A method for manufacturing an axial gap motor.

4. In the assembling step, the first member and the second member are moved simultaneously at the same speed while the central member is fixed so as to be immovable. The method for manufacturing an axial gap motor according to claim 3.

5. The central member has a cylindrical housing (21) to which the outer periphery of the stator body is fixed. The method for manufacturing an axial gap motor according to claim 3.

6. The rotating shaft has a flange portion (31 a) extending radially outward, The flange portion has a flange fixing hole (31b) and a flange temporary fixing hole (31c), The first core member has a first fixing hole (32d) and a first temporary fixing hole (32e), The second core member has a second fixing hole (41d) and a hole (41e), In the assembling step, the first core member and the rotating shaft are fixed by a first bolt (36) passing through the first temporary fixing hole and the flange temporary fixing hole, In the core fixing step, the second core member, the first core member, and the rotating shaft are fixed together by a second bolt (44) passing through the second fixing hole, the first fixing hole, and the flange fixing hole, a removal step of removing the first bolt from the first temporary fixing hole and the flange temporary fixing hole through the removal hole after the core fixing step, The method for manufacturing an axial gap motor according to claim 3.

7. A method for manufacturing an axial gap motor (70) including a rotor body portion (71) disposed at a center in an axial direction of a rotating shaft (77), a first stator body portion (73) disposed to face the rotor body portion in a first direction in the axial direction, and a second stator body portion (75) disposed to face the rotor body portion in a second direction that is an opposite direction to the first direction, comprising: an assembly process for relatively moving a central member (72) having the rotor body portion, a first member (74) having the first stator body portion, and a second member (75) having the second stator body portion so that the first stator body portion and the second stator body portion simultaneously approach the rotor body portion, In the assembling step, the central member and the second member are moved simultaneously while the first member is fixed so as to be immovable, and the second member is moved at a speed twice as fast as the speed of the central member. A method for manufacturing an axial gap motor.

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