JP2013153590A - Stator, and transfer method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stator which can be positioned for the chuck claw of a transport device with high accuracy, and to provide a transfer method thereof.SOLUTION: A core element sub-assembly 201 configuring a stator has a strut 26 extending from the axial end face of an annular coated part 22. A pair of recesses 27 are formed in one and the other sidewalls of the strut 26 in the circumferential direction. Consequently, the strut 26 is chucked in a state where the protrusions 942 of a pair of chuck claws 94, having protrusions 942 that can be fitted in the recesses 27 of the strut 26, are fitted in the recesses 27 from one and the other sides of the strut 26 in the circumferential direction, and the core element sub-assembly 201 can be transferred. Positioning accuracy corresponding to the fitting accuracy of the protrusions 942 and recesses 27 can thereby be ensured during transportation.

Description

  The present invention relates to a stator of a brushless motor and a conveying method thereof.

2. Description of the Related Art Conventionally, a brushless motor that rotates a rotor provided inside a stator by controlling energization of a winding wound around a stator core and continuously switching a magnetic field is known.
On the other hand, as a configuration relating to positioning of assembled parts, for example, Patent Document 1 discloses a configuration of a motor stator that positions an upper insulator and a lower insulator in a circumferential direction.

JP 2009-38947 A

  By the way, the manufacturing process of the stator mainly includes a process of resin-molding an insulator around the core to form a core subassembly and a process of winding a winding around the core subassembly to complete the stator. In particular, when automating the manufacturing process, the core subassembly is gripped by the chuck claw of the transfer device during the winding process of the core subassembly, the preparation process thereof, or between the processes, and the vertical direction and the horizontal linear direction. It may be necessary to carry in the horizontal rotation direction or the like. Further, in the process of assembling the brushless motor using the wound winding stator, it may be necessary to grip the stator with the chuck claws of the transport device and transport it.

In such conveyance, in order to stabilize the quality of the assembly product and to avoid troubles associated with conveyance, positioning accuracy between the chuck claw and the workpiece, that is, the chuck claw and the core subassembly or the stator is required.
The configuration of Patent Document 1 relates to the positioning of the assembly parts, and cannot be applied to the positioning of the chuck claw and the workpiece of the transport device.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a stator that can be positioned with high accuracy and a chuck claw of a conveying device, and a conveying method thereof.

The present invention relates to a brushless motor stator that rotates a rotor by a rotating magnetic field generated by energizing a winding.
The stator includes a winding, a core, and an insulator.
The core includes an annular portion that extends in the circumferential direction and forms an annular outer edge, and a plurality of teeth that project radially from the annular portion in the radially inward direction.
The insulator includes an annular covering portion for insulatingly covering the annular portion, a teeth covering portion for insulatingly covering the tooth portion and winding the winding, and an annular covering portion exceeding the axial height of the wound winding. It has a support | pillar part extended from the axial direction end surface.
The at least one strut has a pair of recesses formed on one and the other side walls in the circumferential direction.

  As a result, a pair of chuck claws having a convex portion that can be fitted into the concave portion of the column portion chucks the column portion with the convex portion fitted into the concave portion from one side and the other side in the circumferential direction of the column portion. In addition, the stator can be conveyed. Therefore, the positioning accuracy according to the fitting accuracy of the convex portion and the concave portion can be ensured at the time of conveyance.

Moreover, since the support | pillar part has extended beyond the axial direction height of the wound coil | winding, the recessed part is exposed similarly before and after the coil | winding is wound. Therefore, the core subassembly before winding winding and the stator after winding winding can be chucked in the same state.
Furthermore, the height of the column portion can be ensured as long as possible by extending beyond the axial height of the winding around which the column portion is wound. Therefore, the contact area between the support column and the chuck claw is increased, which is advantageous for maintaining the attitude of the stator during conveyance.

  Here, the recess is preferably formed so as to gradually become deeper toward a virtual center line connecting the pair of recesses. Specifically, the cross-sectional shape of the recess may be semicircular or V-shaped. And the convex part of a chuck nail is made into the shape corresponding to this, and the concave part of a support | pillar part is centered with respect to the convex part of a chuck nail at the time of chucking. Therefore, the positioning accuracy can be further improved.

The present invention further provides a method for transporting a stator or a core subassembly before windings are wound around the stator.
In this conveying method, a pair of chuck claws having a convex portion that can be fitted into the concave portion of the column portion are fitted in the concave portion from one side and the other side in the circumferential direction of the column portion. Chucking.
Thereby, there exists an effect similar to the invention which concerns on said stator.

It is an axial sectional view of a fuel pump using a stator of a brushless motor according to an embodiment of the present invention. It is an II direction arrow line view of FIG. It is the III-III sectional view taken on the line of FIG. It is a wiring connection diagram. It is a schematic diagram which shows the wiring layout of a coil | winding. It is a perspective view before the resin mold of the stator by one Embodiment of this invention. It is the VII-VII sectional view taken on the line of FIG. 6 of the state which attached the stator element. 7A is a plan view of a W-phase stator element, and FIG. 7B is a sectional view taken along line VIII-VIII in FIG. 6. FIG. 7A is a plan view of a V-phase stator element, and FIG. 7B is a cross-sectional view taken along line IX-IX in FIG. 6. FIG. 7A is a plan view of a U-phase stator element, and FIG. 7B is a sectional view taken along line XX in FIG. 6. It is a top view of the core element subassembly which comprises the stator by one Embodiment of this invention. It is a principal part enlarged view of FIG. It is a XIII direction arrow line view of FIG. It is a XIV direction arrow line view of FIG. It is a front view which shows the 1st process of the conveyance method of the core element subassembly by one Embodiment of this invention. It is a side view which shows the 1st process of the conveyance method of the core element subassembly by one Embodiment of this invention. It is a front view which shows the 2nd process of the conveyance method of the core element subassembly by one Embodiment of this invention. It is a side view which shows the 2nd process of the conveyance method of the core element subassembly by one Embodiment of this invention. It is a front view which shows the 3rd process of the conveyance method of the core element subassembly by one Embodiment of this invention. It is a side view which shows the 3rd process of the conveyance method of the core element subassembly by one Embodiment of this invention. It is a front view which shows the 4th process of the conveyance method of the core element subassembly by one Embodiment of this invention. It is a side view which shows the 4th process of the conveyance method of the core element subassembly by one Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(One embodiment)
An embodiment in which a brushless motor including a stator according to an embodiment of the present invention is used as a motor part of a fuel pump will be described with reference to FIGS.

First, the overall configuration of the fuel pump will be described with reference to FIGS.
The fuel pump 1 sucks fuel in a fuel tank (not shown) from a suction port 61 shown in the lower part of FIG. 1, and discharges it to an internal combustion engine from a discharge port 78 shown in the upper part of FIG. The fuel pump 1 is roughly divided into a motor part 3 as a “brushless motor” and a pump part 4, and an outer shell is constituted by a housing 19, a pump cover 60, a cover end 40, and the like. In the following description of the fuel pump 1, the upper side of FIG. 1 is represented as “the discharge port 78 side” and the lower side of FIG. 1 is represented as “the suction port 61 side”.

The housing 19 is formed in a cylindrical shape from a metal such as iron.
The pump cover 60 closes the end of the housing 19 on the inlet 61 side. The pump cover 60 is fixed on the inner side of the housing 19 by crimping the end edge of the housing 19 on the suction port 61 side inward, and is prevented from coming off in the axial direction.
The cover end 40 is molded of resin and closes the end of the housing 19 on the discharge port 78 side. The cover end 40 is fixed on the inner side of the housing 19 by crimping the edge of the end portion on the discharge port 78 side of the housing 19 to the inner side, and is prevented from coming off in the axial direction.

A cylindrical portion 41 protruding upward in FIG. 1 is formed outside the cover end 40. A discharge port 78 is formed at the end of the tube portion 41, and a discharge passage 77 communicating with the discharge port 78 is formed inside the tube portion 41.
On the inner side of the cover end 40, a cylindrical portion 42 that protrudes in a cylindrical shape toward the rotor 50 is formed on the central axis. A bearing 55 is fitted inside the cylindrical portion 42.

Next, a schematic configuration of the motor unit 3 will be described. The motor unit 3 includes a stator 10, a rotor 50, a shaft 52, and the like.
The stator 10 has a cylindrical shape and is accommodated inside the housing 19. The stator 10 includes a core 11, an insulator 21, a winding 30, terminals 331, 332, and 333. The core 11 is made of a magnetic material such as iron. The insulator 21 is formed by inserting the core 11 and resin molding, and insulates the winding 30 from the core 11. The inner wall surface of the core 11, that is, the surface facing the rotor 50 is not resin-molded and the metal surface is exposed.
In the present embodiment, the stator 10 is configured by combining three stator elements. Details of this will be described later.

The winding 30 is wound around a core subassembly 20 in which the core 11 is resin-molded and insulated by an insulator 21. The insulator 21 holds the core 11 and the winding 30 while insulating them. The winding 30 is, for example, a copper wire whose surface is covered with an insulating film.
The core subassembly 20 around which the winding 30 is wound is further integrally molded by the resin mold portion 16.

  As shown in FIG. 3, the core 11 of the present embodiment includes six divided cores 111 to 116. Each of the split cores 111 to 116 has an annular portion 12 that forms an annular outer edge, and a teeth portion 13 that protrudes radially from the annular portion 12 in the radially inward direction. Further, six slots 14 penetrating in the axial direction are formed between the tooth portions 13 of the divided cores 111 to 116 adjacent to each other.

  In this embodiment, the split cores 111 to 116 are insulated and covered by the insulator 21 with a pair of split cores facing each other across the central axis as a unit to constitute a core element subassembly. That is, in this embodiment, the core subassembly 20 is comprised from the three core element subassemblies 201-203. Further, a winding is wound around each of the core element subassemblies 201 to 203 to constitute a stator element described later.

The winding 30 is continuously concentrated and wound around the teeth 13 of the divided cores 111 to 116 through the slots 14. The winding 30 concentratedly wound around the tooth portion 13 is represented as coils 321 to 326. As shown in FIG. 4, the “winding 30” includes coils 321 to 326 and connecting wires 311 to 316 described later.
Here, it supplements about illustration of FIG. 1 is a cross-sectional view taken along the line II of FIG. 2 and FIG. 3, the left half of FIG. 1 shows the cross section of the split core 112 around which the coil 322 is wound, and the right half of FIG. The cross section of the wound divided core 115 is shown.

The rotor 50 is rotatably accommodated inside the stator 10. The rotor is provided with a magnet 54 around the iron core 53. As shown in FIG. 3, in the magnet 54, N poles 541 and S poles 542 are alternately arranged in the circumferential direction. In the present embodiment, as an example, the N pole 541 and the S pole 542 are provided as four pole pairs, for a total of eight poles.
The shaft 52 is press-fitted and fixed in a shaft hole 51 formed on the central axis of the rotor 50, and rotates together with the rotor 50.

  The terminals 331, 332, and 333 are provided at positions that do not interfere with the cylindrical portion 41 of the cover end 40, and project in the axial direction. In this embodiment, the terminal 331 corresponds to the W phase, the terminal 332 corresponds to the V phase, and the terminal 333 corresponds to the U phase terminal. As shown in FIG. 4, the windings 30 of the respective phases are connected to the terminals 331, 332, and 333, and three-phase power from a driving device (not shown) is supplied to the windings 30 through the terminals 331, 332, and 333. . When electric power is supplied to the winding 30, a rotating magnetic field is generated in the stator 10, and the rotor 50 rotates together with the shaft 52.

Returning to FIG. 1, the configuration of the pump unit 4 will be described next.
The pump cover 60 has a cylindrical suction port 61 that opens downward in FIG. A suction passage 62 that penetrates the pump cover 60 in the plate thickness direction is formed inside the suction port 61.
A pump casing 70 is provided in a substantially disc shape between the pump cover 60 and the stator 10. A hole 71 that penetrates the pump casing 70 in the plate thickness direction is formed at the center of the pump casing 70. A bearing 56 is fitted in the hole 71 of the pump casing 70. The bearing 56 rotatably supports both axial sides of the shaft 52 together with the bearing 55 fitted in the cover end 40. Thereby, the rotor 50 and the shaft 52 are rotatable with respect to the cover end 40 and the pump casing 70.

  The impeller 65 is formed in a substantially disk shape with resin. The impeller 65 is accommodated in a pump chamber 72 between the pump cover 60 and the pump casing 70. The end portion of the shaft 52 on the pump chamber 72 side has a “D shape” in which a part of the outer wall is cut, and is fitted into a corresponding D shape hole 66 formed in the center portion of the impeller 65. It is. As a result, the impeller 65 rotates in the pump chamber 72 by the rotation of the shaft 52.

  A groove 63 connected to the suction passage 62 is formed on the surface of the pump cover 60 on the impeller 65 side. A groove 73 is formed on the surface of the pump casing 70 on the impeller 65 side. A passage 74 that penetrates the pump casing 70 in the plate thickness direction communicates with the groove 73. A blade portion 67 is formed in the impeller 65 at a position corresponding to the groove 63 and the groove 73.

  When the impeller 65 rotates together with the rotor 50 and the shaft 52 by supplying electric power to the winding 30 of the motor unit 3, the fuel outside the fuel pump 1 is guided to the groove 63 via the suction port 61. The fuel guided to the groove 63 is guided to the groove 73 while being pressurized by the rotation of the impeller 65. The pressurized fuel flows through the passage 74 and is guided to the intermediate chamber 75 on the motor unit 3 side of the pump casing 70. Then, the intermediate chamber 75 reaches a discharge passage 77 via a fuel passage that cuts through the motor unit 3 and is discharged from a discharge port 78.

  In the present embodiment, two fuel passages are formed that run vertically through the motor unit 3. The first fuel passage includes a passage 761 between the outer wall of the rotor 50 and the inner wall of the stator 10, and a passage 762 between the outer wall of the cylindrical portion 42 of the cover end 40 and the inner wall of the central ring portion 24 of the insulator 21. Via. Further, the second fuel passage 79 passes between the outer wall of the stator 10 and the inner wall of the housing 19.

Next, the configuration of the stator 10 will be described with reference to FIGS.
First, connection of the winding 30 which is an electrical configuration will be described with reference to FIGS. 4 and 5.
As shown in FIG. 4, in the present embodiment, the three-phase winding 30 forming the magnetic circuit of the stator 10 is delta-connected, and two coils are connected in series between the terminals of each phase.
Specifically, a W-phase first coil 321, a jumper wire 311, a W-phase second coil 324 and a jumper wire 312 are connected in series in this order between the W-phase terminal 331 and the V-phase terminal 332.
In addition, a V-phase first coil 322, a jumper 313, a W-phase second coil 325, and a jumper 314 are connected in series in this order between the V-phase terminal 332 and the U-phase terminal 333.
Further, between the U-phase terminal 333 and the W-phase terminal 331, a U-phase first coil 323, a jumper 315, a U-phase second coil 326, and a jumper 316 are connected in series in this order.

  FIG. 5 is a schematic diagram showing a wiring layout of windings corresponding to the connection diagram of FIG. Here, the arrow in the figure indicates the winding direction. As shown in FIG. 5, for example, the winding can be written with a single stroke until starting from the W-phase terminal 331 and returning to the W-phase terminal 331.

Next, the mechanical configuration of the stator 10 will be described with reference to FIGS.
As shown in FIGS. 6 and 7, the stator 10 of the present embodiment is configured by combining three stator elements 101, 102, and 103. The stator elements 101, 102, and 103 are obtained by winding a winding 30 around three core element subassemblies 201, 202, and 203, respectively. Specifically, as shown in FIGS. 8 to 10, the stator element 101 includes W-phase split cores 111 and 114, the stator element 102 includes V-phase split cores 112 and 115, and the stator element 103 includes a U-phase split core. Cores 113 and 116 are included.

Each of the core element subassemblies 201, 202, and 203 includes an annular covering portion 22, a teeth covering portion 23, a central annular portion 24 (241, 242, 243), and the like.
The annular covering portion 22 covers the annular portion 12 of the core 11, and the teeth covering portion 23 covers the teeth portion 13 of the core 11. A winding 30 is wound around the teeth covering portion 23 to form coils 321 to 326. Between the coils 321 to 326, connecting wires 311 to 316 that connect the coils in the circumferential direction or connect the coil and the terminal are wired.
In the center ring portions 241, 242, and 243, the crossover wire holding portions 25 that hold the crossover wires 311 to 316 are formed along the outer periphery. Note that the center ring portion 243 of the U-phase core element subassembly 203 shown in FIG. 10 is formed in a semi-annular shape.

  The central ring portions 241, 242, 243 of the core element subassemblies 201, 202, 203 are formed on the inner side in the radial direction of the core 11 so as to have different heights in the axial direction. Specifically, the three core element subassemblies 201, 202, and 203 are combined by forming the central ring portions 241, 242, and 243 in this order from the lower side and stacking them.

A first holding groove 35 that holds the winding start portion of the winding 30 and a second holding groove 36 that holds the winding end portion of the winding 30 are formed in the annular covering portion 22.
The annular covering portion 22 is provided with a column portion 26 that protrudes from the axial end surface. The support column 26 extends beyond the axial height of the coils 321 to 326 wound around the teeth covering unit 23.

  Next, the structure of the recessed part 27 of the support | pillar part 26 which is the characteristic structure of this invention is demonstrated with reference to FIGS. FIGS. 11 to 14 show the struts 26 in the W-phase core element subassembly 201 on behalf of the three core element subassemblies, and the other core element subassemblies 202 and 203 have the same configuration.

  As shown in FIGS. 11-14, the support | pillar part 26 has the recessed part 27 formed in the one side wall and the other side of the circumferential direction. In this embodiment, the support | pillar part 26 is cylindrical, and the recessed part 27 exhibits a semicircular cross-sectional shape. That is, as shown in FIG. 12, the concave portion 27 is formed so as to gradually become deeper toward the virtual center line y in the circumferential direction. Further, in the present embodiment, the concave portion 27 is formed from the upper end of the column portion 26 to an intermediate position in the height direction.

On the other hand, in the pair of chuck claws 94 shown by broken lines in FIGS. 12 to 14, rib-shaped convex portions 942 are formed on opposite sides of the quadrangular columnar main body 941. In the present embodiment, the convex portion 942 has a semicircular shape in which the radius of the cross-sectional shape is equal to or slightly smaller than that of the concave portion 27.
The pair of chuck claws 94 are members that grip a workpiece in the transport device. In the pair of chuck claws 94, the main body 941 presses against the side wall of the support column 26 in a state where the protrusions 942 are fitted into the recesses 27 from both sides in the circumferential direction of the support column 26, thereby chucking the support column 26.

Subsequently, the transport process of the core element subassembly by the transport device will be described with reference to FIGS. In the following description of the transport process, the core element subassembly 201 is referred to as “work 201”. This conveyance process consists of four processes, and the front view and side view of each process are shown in FIGS.
The receiving jig 90 has a base 901 and a shaft portion 902, and the shaft portion 902 is fitted to the inner diameter portion of the work 201 to hold the posture of the work 201.

The transport device includes two sets of chuck units 91. In the chuck unit 91, a pair of drive units 93 are fixed to inner walls facing the portal bracket 92. A pair of chuck claws 94 are attached to the tips of the rods of the pair of drive units 93. The drive unit 93 is an actuator that reciprocates the rod, and is, for example, an air cylinder or an electric linear actuator.
Two sets of chuck units 91 are raised and lowered simultaneously by a vertical drive mechanism (not shown). The pair of drive units 93 of the two sets of chuck units 91 simultaneously reciprocate the rod with respect to both support columns 26 of the workpiece 21.

(First step)
In the first step shown in FIGS. 15 and 16, the chuck unit 91 is lowered, the rods of the pair of drive portions 93 are advanced, and the pair of chuck claws 94 chuck the support column portion 26 of the work 201. At this time, the convex portions 942 of the pair of chuck claws 94 are fitted into the concave portions 27 of the column portions 26 of the workpiece 201. Since the convex portion 942 and the concave portion 27 have a semicircular cross-sectional shape, the concave portion 27 of the support column portion 26 is centered with respect to the convex portion 942 of the chuck claw 94 during chucking. Therefore, even if there is some variation in the position of the workpiece 201 in the front / rear / left / right direction or the rotation direction when held by the receiving jig 90, the posture of the workpiece 201 is corrected when chucked.

(Second step)
In the second step shown in FIGS. 17 and 18, the chuck unit 91 that holds the work 201 is raised, and the work 201 is removed from the jig 90 and conveyed to a predetermined position. Specifically, the workpiece 201 may be rotated, for example, by a predetermined angle in the horizontal direction within the same process. Alternatively, the workpiece 201 may be moved horizontally to the next process location. In the case where the workpiece 201 is transported to the place of the next process, it is assumed that a similar receiving jig 90 is placed at the transport destination.

(Third step)
In the third step shown in FIGS. 19 and 20, the chuck unit 91 that holds the workpiece 201 is lowered, and the workpiece 201 is received and attached to the jig 90. Then, the rods of the pair of drive parts 93 are retracted, and the pair of chuck claws 94 are separated from the support part 26 of the work 201. That is, the support column 26 is unchucked.
(4th process)
In the fourth step shown in FIGS. 21 and 22, the chuck unit 91 is raised and returned to the original position.

  The above transporting process is the same even if the work is the other core element subassemblies 202 and 203. Furthermore, the recessed part 27 of the support | pillar part 26 is formed in the position which is not covered with the coil 32 wound by the teeth coating | coated part 23 about the height direction. Therefore, the workpiece is not limited to the case of the core element sub-assemblies 201 to 203 before winding the winding 30, but can be similarly conveyed even in the case of the stator elements 101 to 103 after winding the winding 30. it can.

As described above, in this embodiment, when the pair of chuck claws 94 of the transport device chucks the support column 26 from both sides in the circumferential direction, the projection 942 of the chuck claw 94 fits into the recess 27 of the support column 26. Thus, positioning accuracy corresponding to the fitting accuracy can be ensured during conveyance. Further, since the cross-sectional shapes of the convex portion 942 and the concave portion 27 are semicircular, the concave portion 27 is centered on the convex portion 27, and the positioning accuracy can be further improved.
Therefore, it is also advantageous for automation of the stator manufacturing process.

(Other embodiments)
(A) The shape of the support column 26 is not limited to a cylindrical shape, and may be a quadrangular prism shape or the like.
(A) The shape of the recess is not limited to a semicircular shape. For example, even if the concave portion is V-shaped, “the centering function is obtained because it is formed so as to gradually become deeper toward the virtual center line in the circumferential direction”. Alternatively, if the centering function is not required, the recess may be rectangular.

  (C) In the said embodiment, the core 11 is comprised from the division | segmentation cores 111-116, and also the stator 10 is comprised combining the several stator elements 101-103. However, the configuration of the concave portion 27 of the column portion 26 according to the present invention is not limited to such a core division type or element combination type stator, but a stator configured integrally or a stator configured bent from an expanded state. Can be widely applied to etc.

(D) The configuration of the motor unit 3 other than the stator 10 and the configuration of the fuel pump other than the motor unit 3 are not limited to the above embodiment.
(E) The stator according to the present invention is not limited to a brushless motor for a fuel pump, but can be used for other fluid pumps or any device using a rotational driving force.
As mentioned above, this invention is not limited to such embodiment, In the range which does not deviate from the meaning of invention, it can implement with a various form.

3 ... Motor part (brushless motor),
10: Stator,
11: Core,
12 ... annular part, 13 ... teeth part,
21 ・ ・ ・ Insulator,
22 ... annular covering part, 23 ... teeth covering part,
26 ・ ・ ・ Staff part,
27 .. recessed portion,
30 ... winding,
50: Rotor.

Claims (3)

A stator (10) of a brushless motor (3) that rotates a rotor (50) by a rotating magnetic field generated by energizing a winding (30),
Windings,
A core (11) having an annular portion (12) extending in the circumferential direction and constituting an annular outer edge, and a plurality of teeth portions (13) projecting radially inward from the annular portion;
An annular covering portion (22) for insulatingly covering the annular portion, a teeth covering portion (23) for insulatingly covering the tooth portion and wound with the winding, and an axial height of the wound winding An insulator (21) having a post portion (26) extending from the axial end surface of the annular covering portion beyond
With
The stator according to claim 1, wherein the at least one support column has a pair of recesses (27) formed on one and the other side walls in the circumferential direction.   The stator according to claim 1, wherein the recess is formed so as to gradually become deeper toward a virtual center line connecting the pair of recesses. The stator according to claim 1 or 2, or a method for transporting the core subassembly before the winding is wound around the stator,
A pair of chuck claws (94) having a convex portion (942) that can be fitted into the concave portion of the column portion fits the convex portion into the concave portion from one side and the other side in the circumferential direction of the column portion. A method of transporting a stator or core subassembly, comprising the step of chucking the support column in a state of being caused to stand.

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