JP2004364360A - Structure of coaxial multi-shaft motor and assembling method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure of coaxial multi-shaft motor, along with an assembling method thereof, for easy positioning in axial direction when assembling the coaxial multi-shaft machine. <P>SOLUTION: The motor of coaxial multi-shaft structure comprises a plurality of rotors and at least one stator. Coaxial shafts 201a, 202a, and 203a constituting the coaxial multi-shaft structure are provided with through holes 201f, 202f, and 203f for positioning in almost radial direction of the shaft. A pin-like part 204 is made to penetrate the through hole for positioning, for temporary holding of coaxial shafts together in the axial direction. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a structure and an assembling method of a rotating electric machine having a plurality of rotors and one or more stators and having a concentric multiaxial structure.
[0002]
[Prior art]
Generally, when it is attempted to fix the relative positions of the rotor and the stator in the state of a rotating electric machine having a concentric multi-axis structure, the fixing means is used to fix the relative position of the rotating electric machine to a partner component in a machine using the rotating electricity as power. A method of fabricating a jig for fixing means and fixing with this jig, or a method of fixing each shaft of this rotating electric machine by giving a function or shape dedicated to fixing that is not necessary for its original function Often (for example, see Patent Document 1).
[0003]
In addition, in order to assemble a multi-layer structure in which each shaft constituting the concentric multi-shaft structure, such as a rotating electric machine having a concentric multi-shaft structure, each shaft must be arranged in order to obtain their axes. It is good to install vertically. In this case, when the lengths of the respective axes are different from each other, it is necessary to define the positional relationship between the respective axes in the axial direction.
[0004]
[Patent Document 1]
JP-A-2000-14086 (FIG. 1)
[0005]
[Problems to be solved by the invention]
In the above-mentioned conventional method, the joining of each axis and the jig is reliable, but the jig body for fixing the relative position of each axis requires a high accuracy and a positioning mechanism, and the fixing work process becomes complicated, and the cost is reduced. Had to be high. In addition, when a dedicated function or shape is provided only for fixing, there is also a problem that there is a high possibility that the size and strength are disadvantageous.
[0006]
SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems and to provide a structure and an assembling method of a concentric multi-axis rotating electric machine which can simplify positioning in an axial direction when assembling the concentric multi-axis rotating electric machine. It is.
[0007]
[Means for Solving the Problems]
The structure of the concentric multi-axis rotating electric machine according to the present invention includes a plurality of rotors and one or more stators. The shaft is provided with a through hole for positioning in a substantially radial direction of the shaft.
[0008]
【The invention's effect】
In the structure of the concentric multi-axis rotating electric machine of the present invention, the concentric shafts constituting the concentric multi-axis structure are provided with through holes for positioning in a substantially radial direction of the shaft, thereby assembling. Sometimes a pin-like component can be inserted and temporarily fastened in the through hole, and axial positioning can be easily performed.
[0009]
In the structure of the concentric multi-axis rotating electric machine of the present invention, the positioning through-hole may constitute a lubricating oil passage. With this configuration, the lubricating oil passage normally provided on the concentric shaft can be used as a hole passing through a pin-like component for fixing the shaft, so that there is no need to set a special mechanism or shape, and the assembly is completed. Temporary fixing can be performed, and positioning in the axial direction can be simplified. In addition, the necessary jigs can be manufactured simply and inexpensively with pin-like parts, and general-purpose parts such as needle rollers for bearings can be used, and pin-like parts can be inserted for temporary fixing work in the assembly process. Therefore, the jig production cost and work time can be reduced, which can contribute to cost reduction.
[0010]
Further, in the structure of the concentric multi-axis rotating electric machine of the present invention, the axial position of the through-hole of each concentric shaft may be arbitrarily offset. With this configuration, since the axial position of each shaft can be temporarily fixed and offset, the assembly time of a plurality of shaft support portions can be shifted, so that a difficult operation of simultaneously incorporating a plurality of bearing portions can be performed. It can be eliminated and workability can be improved.
[0011]
Further, in the structure of the concentric multi-axis rotating electric machine of the present invention, the axial positions of the through holes provided in all the concentric shafts may be the same. With this configuration, the circumferential and axial positions of all the shafts can be temporarily fixed without setting a special shaft fixing jig, so that, for example, the cost of the fixing jig during transport can be reduced, and In addition, the packing operation can be simplified.
[0012]
Furthermore, in the structure of the concentric multi-axis rotating electric machine of the present invention, the pin-like component penetrated into the through-hole is provided with a hole orthogonal to the axis of the pin-like component, and the overhanging component is inserted into the hole. Thus, the insertion depth of the pin-like component can be determined. With this configuration, the overhanging part can be installed at a position where the pin-like part stops at a depth necessary for fixing the target shaft in advance, so that the measurement or the appropriate insertion depth can be performed during the temporary fastening work of the shaft. It is possible to omit the operation of searching for the information, thereby improving the workability.
[0013]
Further, in the structure of the concentric multi-axis rotating electric machine of the present invention, at both ends of the pin-like component penetrating through the through-hole of each concentric shaft, holes perpendicular to the axis of the pin-like component are provided. By communicating with the linear body, it is possible to prevent the pin-like component from coming off. With such a configuration, a simple operation such as connecting the ends of the linear body such as the piano wire after connecting the linear body such as the piano wire to the holes opened at both ends of the pin-like part, It is possible to reliably prevent the pin-like member from falling off. Therefore, for example, during transportation, if each shaft is fixed, it is possible to prevent bearing parts and other failures due to impact load during transportation work, which is very advantageous for quality control, and This can contribute to a reduction in jig cost.
[0014]
Further, in the method of assembling the concentric multi-axis rotating electric machine according to the present invention, the pin-like parts are passed through the positioning through holes having the above-described configuration, so that the respective concentric shafts are temporarily fixed in the axial direction. be able to. According to this structure, the pin-like component can be inserted into the through hole and temporarily fixed at the time of assembly, and the axial positioning can be easily performed.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is an overall view of a hybrid drive unit to which a concentric multi-axis rotating electric machine is applied. In FIG. 1, E denotes an engine, M denotes a multi-axis multilayer motor, G denotes a Ravigneaux type compound planetary gear train, and D denotes a drive output. The mechanism 1 is a motor cover, 2 is a motor case, 3 is a gear housing, and 4 is a front cover.
[0016]
The engine E is a main power source of the hybrid drive unit. The engine output shaft 5 is connected to the second ring gear R2 of the Ravigneaux-type compound planetary gear train G via a rotation fluctuation absorbing damper 6 and a multi-plate clutch 7. ing.
[0017]
The concentric multi-axis rotating electric machine M is a single motor in appearance, but is a sub power source having two motor generator functions. The concentric multi-axis rotating electric machine M is fixed to the motor case 2 and has a stator S as a fixed armature wound with a coil, an inner rotor IR disposed inside the stator S and having a permanent magnet embedded therein, The outer rotor OR having the permanent magnet embedded therein is disposed outside the stator S, and is coaxially arranged in three layers. A first motor hollow shaft 8 fixed to the inner rotor IR is connected to a first sun gear S1 of a Ravigneaux type compound planetary gear train G, and a second motor shaft 9 fixed to the outer rotor OR is a Ravigneaux type compound planetary gear. It is connected to the second sun gear S2 in the row G.
[0018]
The Ravigneaux type compound planetary gear train G is a planetary gear mechanism having a continuously variable transmission function of continuously changing a transmission ratio by controlling two motor rotation speeds. The Ravigneaux type compound planetary gear train G includes a common carrier C that supports a first pinion P1 and a second pinion P2 that mesh with each other, a first sun gear S1 that meshes with the first pinion P1, and a second sun gear that meshes with the second pinion P2. S2, a first ring gear R1 that meshes with the first pinion P1, and a second ring gear R2 that meshes with the second pinion P2. A multiple disc brake 10 is interposed between the first ring gear R1 and the gear housing 3. An output gear 11 is connected to the common carrier C.
[0019]
The drive output mechanism D includes an output gear 11, a first counter gear 12, a second counter gear 13, a drive gear 14, a differential 15, and drive shafts 16, 16. The output rotation and output torque from the output gear 11 pass through the first counter gear 12 → second counter gear 13 → drive gear 14 → differential 15 and are transmitted from the drive shafts 16, 16 to drive wheels (not shown). You.
[0020]
That is, the hybrid drive unit connects the second ring gear R2 to the engine output shaft 5, connects the first sun gear S1 to the first motor hollow shaft 8, connects the second sun gear S2 and the second motor shaft 9, And the output gear 11 is connected to the common carrier C.
[0021]
FIG. 2 is a diagram showing in more detail a concentric multi-axis rotating electric machine to which the present invention is applied, which constitutes a vehicular hybrid transmission in combination with a Ravigneaux type planetary gear train. The structure and assembly method of the concentric multi-axis rotating electric machine of the present invention can be applied to this concentric multi-axis rotating electric machine. The concentric multi-axis rotating electric machine having the configuration shown in FIG. 2 includes an annular stator 101 and inner rotors rotatably arranged on a predetermined rotation axis O coaxial with each other radially inward and outward. A three-layer structure including the outer rotor 102 and the outer rotor 103 is housed in a housing 104.
[0022]
Each of the inner rotor 102 and the outer rotor 103 has laminated cores 124 and 125 which are formed by laminating a plate material formed by pressing an electromagnetic steel plate or the like in the axial direction of the rotor. The permanent magnets penetrating in the direction are arranged at equal intervals in the circumferential direction. The number of pole pairs of the inner rotor 102 and the outer rotor 103 is made different by changing the number of magnetic poles arranged. As an example, the number of magnets is the same for the inner rotor 102 and the outer rotor 103, and is 12 each. However, since the inner rotor 102 forms one pole with two magnets, the number of pole pairs is Are three pole pairs, and the outer rotor 103 forms one pole with one magnet, so the number of pole pairs is six pole pairs.
[0023]
When the inner rotor 102 and the outer rotor 103 are stored in the housing 104, the outer rotor 103 is provided with a torque transmission shell 105 drivingly connected to the outer periphery of the laminated core 125, and both ends of the torque transmission shell 105 are bearings. The housing 107 is rotatably supported by the housing 104 and the torque transmission shell 105 is coupled to the outer rotor shaft 109 on the bearing 107 side.
[0024]
The inner rotor 102 is provided at the center of the laminated core 124 with a hollow inner rotor shaft 110 penetrating the outer rotor shaft 109 rotatably inside the laminated core 124, and between the laminated core 124 and the inner rotor shaft 110 of the inner rotor 102. Drive coupling. An intermediate portion of the inner rotor shaft 110 is rotatably supported in a fixed stator bracket 113 by a bearing 112, and one end (the left end in FIG. 2) is rotatable by a bearing 114 on a corresponding end wall of the torque transmission shell 105. To support.
[0025]
The stator 101 includes a plurality of stator pieces formed by laminating an I-shaped stator steel plate formed by pressing an electromagnetic steel plate in the axial direction of the stator. As shown in FIG. 2, an electromagnetic coil 117 is wound around each of the stator pieces at the teeth between the outer rotor-side yoke and the inner rotor-side yoke, and these coil-wound stator pieces are equally spaced in the same circumferential direction. That is, the stator core is arranged in a circular shape to form a stator core. The stator core is sandwiched between brackets 113 and 118 on both sides in the axial direction of the stator by bolts 119 and is entirely molded with a resin 120 to integrally form the stator 101. . A coolant passage 141 is formed in the resin 120 between the adjacent stator pieces 116 in the axial direction, and the bolts 119 are located radially inward and outward of the coolant passage 141, respectively. Here, each bolt 119 is tightened by a nut 119a screwed thereto. Needless to say, the tightening structure using bolts and nuts may be a tightening structure using rivet pins.
[0026]
In driving the motor, the rotation positions of the inner rotor 102 and the outer rotor 103 detected by the rotation sensor 148 and the rotation sensor 147, that is, both rotors 102 and 103 corresponding to the positions of the permanent magnets provided as described above. A composite current obtained by combining drive currents having different phases is supplied to the electromagnetic coil 117 of the stator 101, and thereby the rotating magnetic fields for both the rotors 102 and 103 are individually generated in the stator, thereby generating a rotating magnetic field. The rotors 102 and 103 can be individually driven to rotate synchronously.
[0027]
The structure and the assembling method of the concentric multi-axis rotating electric machine according to the present invention transmit torque from the stator 101, the inner rotor 102, and the outer rotor 103 to the external device about the rotation axis O in the concentric multi-axis rotating electric machine shown in FIG. The present invention relates to a shaft structure and a method of assembling the same. Hereinafter, the features of the present invention will be described. In the example shown in FIG. 2 and the example shown in FIG. 3 and the like, the same members are given different names and reference numerals for convenience of description, but substantially the same. It goes without saying that the members are the same.
[0028]
FIG. 3 is an axial sectional view of an example of the concentric multi-axis rotating electric machine according to the present invention, which is substantially the same as the example shown in FIG. The structure of the rotating electric machine will be described. The rotating electric machine includes a stator 201 fixed to a transmission housing, an inner rotor 2 which is concentric with the stator 201 and has a laminated core 202b and a permanent magnet 202c on the inner peripheral side of the stator 201; And an outer rotor 203 having a laminated core 203b and a permanent magnet 203c on the outer peripheral side of the rotor.
[0029]
The inner rotor 202 is rotatably joined to the stator 201 by a front bearing 202d, and is rotatably joined to the outer rotor 3 by a rear bearing 202e. The outer rotor 203 is rotatably joined to the stator 201 by a front bearing 203d and a rear bearing 203e. The stator 201 has a hollow shaft 201a, the inner rotor 202 has a hollow shaft 202a, and the outer rotor 203 has a hollow shaft 203a. The respective hollow shafts are concentrically overlapped from the outer peripheral side in the order of the hollow shaft 201a of the stator, the hollow shaft 202a of the inner rotor, and the hollow shaft 203a of the outer rotor.
[0030]
FIG. 4 is an enlarged view of a portion A in FIG. 3 and is a diagram showing a configuration of a lubricating oil passage provided in the entire axial direction of each shaft. This lubricating oil passage will be described. The lubricating oil is first supplied to the hollow shaft 203a of the outer rotor 203. A part of the lubricating oil supplied to the hollow shaft 203a passes through a lubricating oil passage 203f provided in the hollow shaft 203a, and is cylindrical between the hollow shaft 202a of the inner rotor 202 and the hollow shaft 203a of the outer rotor 203. Supplied to the department. A part of the lubricating oil supplied to the cylindrical tubular portion passes through a lubricating oil passage 202f provided in the hollow shaft 202a of the inner rotor 202, and passes through the hollow shaft 202a of the inner rotor 2 and the hollow shaft 201a of the stator 201. Is supplied to the cylindrical tubular portion between them. A part of the lubricating oil supplied to the cylindrical tubular portion passes through a lubricating oil passage 201f provided in the hollow shaft 201a of the stator 201 and is supplied to a bearing or the like installed on the outer periphery of the hollow shaft 201a of the stator 201. . Here, the lubricating oil passages 201f, 202f, and 203f provided on each shaft have substantially the same hole in the axial direction, and these lubricating oil passages are formed around the stator 201, the inner rotor 202, and the outer rotor 203. They are arranged in series when the phases in the directions are aligned.
[0031]
FIG. 5 is a diagram showing an example of disposing a lubricating oil passage different from the disposing of the lubricating oil passage shown in FIG. FIG. 5 shows an example in which the lubricating oil passages 201f, 202f, and 203f provided on each shaft are provided obliquely with respect to the axial direction. The lubricating oil passages 201f, 202f, and 203f provided on each shaft do not need to pass through the core of the concentric shaft as long as all the lubricating oil passages have one or more phases that are substantially in series. There is no.
[0032]
6 (a) and 6 (b) are views showing an example of a method of fixing a concentric shaft according to the present invention, wherein FIG. 6 (a) is a sectional view of the shaft, and FIG. 3A shows a view as viewed from the B direction. In the method of assembling the concentric multi-axis rotating electric machine of the present invention, the lubricating oil passage 201f provided on the hollow shaft 201a of the stator 201 in a state where the stator 201 and the inner rotor 202 are engaged only by the front bearing 202d. A pin-like fixing jig 204 is inserted and temporarily fastened so as to penetrate through the lubricating oil passage 202f provided in the hollow shaft 202a of the inner rotor 202 and the inner rotor 202 and the circumferential direction of the stator 201. Perform axial positioning.
[0033]
As shown in FIG. 6B, the fixing jig 204 is provided with a hole 204a substantially orthogonal to the direction in which the fixing jig is inserted into the rotating electric machine. An overhang component 204b that is sufficiently longer than the path diameter is passed through. With the overhanging part 204b in contact with the outer periphery of the hollow shaft 201a of the stator 201, the tip of the pin-like fixing jig 204 is installed inside the inner diameter of the hollow shaft 202a of the inner rotor 202 in a later step. The outer rotor 203 is located outside the outer diameter of the hollow shaft 203a.
[0034]
Since the above-described fixed state can be realized, even if the axis of the stator 201 and the inner rotor 202 is in a substantially vertical direction, the axis of the inner rotor 202 does not fall off from the stator 201, and the axis is previously substantially vertical. It becomes possible to assemble so as to cover the placed outer rotor 203 from above. It is a well-known fact that, when a concentric shaft structure is assembled, if the core can be oriented vertically, eccentricity due to the influence of gravity is eliminated, and centering is facilitated.
[0035]
7 to 12 are views showing another example of the method of fixing the concentric shaft according to the present invention, and sequentially show the steps of the method of assembling the concentric multi-axis rotating electric machine of the present invention. In FIGS. 7 to 12, for convenience of explanation, only the members related to the processes in the respective drawings are denoted by reference numerals, but the other members are the same as those shown in FIG. 3 and the like.
[0036]
In this example, as shown in FIG. 7, the axial position of the lubricating oil passage 202g of the inner rotor 202 is offset axially forward with respect to the axial position of the lubricating oil passage 201f of the stator 201. . Therefore, when the lubricating oil passage 202g of the inner rotor 2 and the lubricating oil passage 201f of the stator 201 are temporarily fixed with a pin-like fixing jig 204, as shown in FIG. The inner rotor 202 is temporarily fixed at a rear position with respect to the axial position of the completed inner rotor 202. Then, as shown in FIG. 8, the temporarily fixed inner rotor 202 and stator 201 are assembled so as to cover the outer rotor 203, which is previously placed so that the axis is substantially vertical, from above.
[0037]
When the temporarily fixed inner rotor 202 and stator 201 are lowered, as shown in FIG. 9, the outer rotor 202 e is first rotated with respect to the rear bearing 202 e between the inner rotor 202 and the outer rotor 203. The bearing support of the child 203 fits. At this time, as shown in FIG. 9, the rear bearing 203 e between the outer rotor 203 and the stator 201 is not in contact with the stator 201. Then, as shown in FIG. 10, after the rear bearing 202e between the inner rotor 202 and the outer rotor 203 and the bearing support of the outer rotor 203 are fitted to some extent, the outer rotor 203 and the stator The fitting between the rear bearing 203 e and the bearing support portion of the stator 201 between the rear bearing 203 e starts. Thereafter, as shown in FIG. 11, when the fitting of the rear bearing 202e between the inner rotor 202 and the outer rotor 203 and the bearing support of the outer rotor 203 is completed, a pin-like fixing jig is completed. The tool 4 is removed. Then, as shown in FIG. 12, the rear bearing 203e between the outer rotor 203 and the stator 201 and the bearing support portion of the stator 1 are completely fitted.
[0038]
In the above assembling step, two bearing support portions, that is, “a rear bearing 202e support portion between the inner rotor 202 and the outer rotor 203” and “a rear bearing between the outer rotor 203 and the stator 201” It is difficult to fit the side bearing 203e support portion at the same time, but it is possible to temporarily fix the inner rotor 202 in a state where it is offset rearward, so that the two bearing support portions can be assembled. Sex is dramatically improved.
[0039]
FIGS. 13 and 14 (a) and 14 (b) are diagrams showing another example of the method of using the pin-like fixing jig according to the present invention. In the example shown in FIG. 13, at both ends of the pin-like fixing jig 205 penetrating all the shafts, the pin-like fixing jig 205 is inserted into the shaft of the rotating electric machine at the outer diameter outside portion of the outermost peripheral shaft. Holes 205a and 205b are provided substantially perpendicular to the direction. A linear body 206 made of, for example, a piano wire is passed through the holes 205a and 205b, and both ends of the linear body 206 are twisted to prevent the pin-like fixing jig 205 from falling off. I do. Further, in the example shown in FIGS. 14A and 14B, the wedge-shaped parts 207 are respectively provided in the holes 205a and 205b, as is apparent from the view seen from the direction C in FIG. 14A shown in FIG. Is inserted to prevent the pin-like fixing jig 205 from falling off.
[0040]
Further, when the lubricating oil passage 201f of the stator 201, the lubricating oil passage 202f of the inner rotor 202, and the lubricating oil passage 203f of the outer rotor 202 have substantially the same diameter (the example in FIG. 13), or the lubricating oil of the stator 201 If the path 201f> the lubricating oil path 202f of the inner rotor 202> the lubricating oil path 203f of the outer rotor 203 (examples of FIGS. 14A and 14B), the pin-like fixing jig 205 By setting the diameter from the intermediate fitting to the clearance fitting to the circulating oil passage, the temporary fixing can be performed with almost no play. The completed concentric multi-axis rotating electric machine will be used later in combination with a transmission and other functional parts or devices, so there is a high possibility that transport work will occur, but it will be engaged via bearings If the parts are fixed, it is possible to prevent the bearing portion from being damaged by an impact load that may occur during the transfer operation, which is very advantageous in quality control.
[0041]
In the above-described embodiment, a rotating electric machine including two rotors and one stator has been described as an example of a rotating electric machine having a concentric multi-axis structure. It is needless to say that the number is not limited. Further, in the above-described embodiment, the example in which the lubricating oil passage is used as the positioning through hole has been described. However, these may not be shared, and a dedicated positioning through hole may be provided in addition to the lubricating oil passage. Needless to say.
[Brief description of the drawings]
FIG. 1 is an overall view of a hybrid drive unit to which a concentric multi-axis rotating electric machine is applied.
FIG. 2 is a diagram showing in more detail a concentric multi-axis rotary electric machine to which the present invention is applied, which constitutes a vehicular hybrid transmission in combination with a Ravigneaux type planetary gear train.
FIG. 3 is a cross-sectional view of an example of a concentric multi-axis rotating electric machine according to the present invention.
FIG. 4 is an enlarged view of a portion A in FIG. 3 and is a view showing an example of a configuration of a lubricating oil passage provided in the entire axial direction of each shaft.
5 is an enlarged view of a portion A in FIG. 3 and is a diagram showing another example of the configuration of the lubricating oil passage provided in the entire axial direction of each shaft.
FIGS. 6 (a) and 6 (b) are diagrams illustrating an example of a method of fixing a concentric shaft according to the present invention.
FIG. 7 is a view showing one step of another example of the method of fixing the concentric shaft according to the present invention.
FIG. 8 is a view showing another step of another example of the method of fixing the concentric shaft according to the present invention.
FIG. 9 is a view showing still another step of another example of the method of fixing the concentric shaft according to the present invention.
FIG. 10 is a view showing still another step of another example of the method of fixing the concentric shaft according to the present invention.
FIG. 11 is a view showing still another step of another example of the method of fixing the concentric shaft according to the present invention.
FIG. 12 is a view showing still another step of another example of the method of fixing the concentric shaft according to the present invention.
FIG. 13 is a view showing another example of a method of using the pin-like fixing jig according to the present invention.
14A and 14B are diagrams showing still another example of a method of using the pin-like fixing jig according to the present invention.
[Explanation of symbols]
101 Stator 102 Inner rotor 103 Outer rotor 201 Stator 201a, 202a, 203a Hollow shaft 201f, 202f, 203f, 202g Lubricating oil passage 202b, 203b Laminated core 202c, 203c Permanent magnet 202d, 203d Front bearing 202e, 203e Rear bearing 204 , 205 Fixing jigs 204a, 204b, 205a, 205b Hole 204b Overhanging portion 206 Linear body

Claims (7)

In a rotating electric machine having a plurality of rotors and one or more stators and a concentric multi-axis structure, for positioning each concentric shaft constituting the concentric multi-axis structure substantially in the radial direction of the shaft. The structure of a concentric multi-axis rotary electric machine characterized by having a through-hole. The structure of the concentric multi-axis rotary electric machine according to claim 1, wherein the positioning through-hole forms a lubricating oil passage. 3. The structure of a concentric multi-axis rotary electric machine according to claim 1, wherein the axial positions of the through holes of the respective concentric shafts are arbitrarily offset. The structure of the concentric multiaxial rotating electric machine according to any one of claims 1 to 3, wherein axial positions of the through holes provided in all the concentric shafts are the same. The pin-like component penetrating the through-hole is provided with a hole orthogonal to the axis of the pin-like component, and the insertion depth of the pin-like component is determined by inserting the overhanging component into the hole. The structure of the concentric multi-axis rotating electric machine according to any one of the above. At both ends of the pin-like component penetrating the through hole of each concentric shaft, holes are provided which are orthogonal to the axis of the pin-like component, and by communicating this hole with a linear body, the pin-like component is prevented from coming off. The structure of the concentric multi-axis rotating electric machine according to claim 4. A method for assembling a rotating electric machine having a plurality of rotors and one or more stators and having a concentric multi-axis structure, wherein a pin is provided in the through hole for positioning according to any one of claims 1 to 6. A method of assembling a concentric multi-axis rotating electric machine, comprising: performing temporary fixing in the axial direction between concentric shafts by penetrating like components.

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