JP2022013098A - Magnetic pole, electric motor and assembling method of magnetic pole - Google Patents

Abstract

To provide a magnetic pole or the like that can support a magnet or an iron core without deteriorating the characteristics.SOLUTION: A magnetic pole includes a first iron core, a second iron core, a permanent magnet arranged such that a first pole faces the first iron core and a second pole faces the second iron core, a support member molded by a non-magnetic material, which covers at least one of a surface that does not face the armature and a surface that does not face the permanent magnet in the first iron core and the second iron core, and supports the first iron core, the second iron core, and the permanent magnet.SELECTED DRAWING: Figure 1

Description

The present invention relates to a monopole, a motor, and a method for assembling the monopole.

Conventionally, an electric machine capable of increasing the number of magnetic fluxes generated in the gap between the armature and the mover has been proposed.
For example, the axial gap type motor described in Patent Document 1 is configured as follows. That is, in the electric motor, a plurality of magnetic pole blocks to which permanent magnets are attached to each of five surfaces other than one main surface of the iron core forming a circular fan-shaped plate are in a movable direction which is an annular direction centered on a rotation axis. It has a rotor configured side by side and a disk-shaped armature arranged so as to face the rotor in the axial direction.

JP-A-2019-75848

In the axial gap type motor described in Patent Document 1, since it is necessary to arrange the permanent magnets and iron cores in three dimensions, there is room for further improvement in that the permanent magnets and iron cores are rotatably supported. rice field. On the other hand, it is not preferable that the magnetic flux generated from the magnetic pole is reduced or the volume of the motor is increased to reduce the characteristics of the motor.
An object of the present invention is to provide a magnetic monopole or the like that can support a magnet or an iron core without deteriorating the characteristics.

In the present invention completed for this purpose, the first core, the second core, and the first pole are arranged so as to face the first core and the second pole faces the second core. The permanent magnet is covered with at least one surface of the first core and the second core that does not face the armature and the surface that does not face the permanent magnet, and the first core, the second core, and the permanent magnet are covered. A magnetic pole provided with a support member formed of a non-magnetic material that supports the permanent magnet.
Here, the support member may have a plurality of protrusions that prevent the permanent magnet from moving toward the first core or the second core.
Further, the plurality of protrusions have a plurality of first surface side protrusions which are protrusions arranged on the first surface side of the permanent magnet, and are surfaces opposite to the first surface of the permanent magnet. It has a plurality of second surface side protrusions which are protrusions arranged on the two surface side, the first iron core is arranged between the plurality of the first surface side projections, and the second core is a plurality of the second iron cores. It may be arranged between the surface side protrusions.
Further, one of the second surface side projections in the plurality of the second surface side projections has a one-sided bending portion bent toward the other second surface side projection, and the other second surface side projection has a bent portion. The side protrusion has a other side bending portion bent toward the second surface side protrusion of the one side, and the second iron core is formed with a recess for accommodating the one side bending portion and the other side bending portion. It may have been done.
Alternatively, the support member has a plurality of protrusions arranged in the rotational direction and protruding in the radial direction, and one protrusion in the plurality of protrusions has a bent portion bent toward the other protrusion. The other protrusion has a bent portion bent toward the one protrusion, and the first iron core is arranged at a portion surrounded by the one protrusion and the other protrusion, and the one is arranged. It may have a convex portion arranged between the bent portion of the protrusion and the bent portion of the other protrusion.
Further, the second iron core and the permanent magnet may all have the same shape as seen in the axial direction of the rotating shaft.
Alternatively, the support member has a plurality of protrusions arranged in the rotational direction and protruding in the radial direction, and one protrusion in the plurality of protrusions is a bent portion bent toward the other protrusion in the plurality of protrusions. The other protrusion may have a bent portion bent toward the one protrusion, and the first iron core may be formed with a recess into which the plurality of protrusions are fitted.
Further, the support member has a plurality of other protrusions facing the plurality of protrusions, which are arranged in the rotation direction and project in the radial direction, and one protrusion in the other plurality of protrusions is the other protrusion. The other protrusion has a bent portion bent toward the other protrusion in the plurality of protrusions, the other protrusion has a bent portion bent toward the one protrusion, and the second iron core has the other plurality. A recess is formed in which the protrusions of the above are fitted, and the first iron core, the permanent magnet, and the second iron core may be arranged between the plurality of protrusions and the other plurality of protrusions.
Further, it has a plurality of units having the first core, the second core and the permanent magnet, and further, an intermediate support arranged between the plurality of units so as to maintain a distance between the plurality of units. A member may be provided.
In addition, the unit has a third core arranged in a direction orthogonal to the second core with respect to the first core, a first pole facing the first core, and a second pole facing the first core. 3 It has a second permanent magnet arranged so as to face the iron core, and the intermediate support member may be arranged between the second permanent magnets of adjacent units.
From another point of view, the present invention is an axial gap type motor including an armature and a magnetic pole element having a rotating shaft and arranged so as to face the armature, wherein the magnetic pole is provided. The child consists of a first core, a second core arranged on the opposite side of the first core from the armature, a first pole facing the first core, and a second pole facing the first pole. 2 Permanent magnets arranged so as to face the core, a surface extending in the axial direction of the rotation axis in the first core and the second core, or a side opposite to the armature in the second core. It is an electric motor provided with a support member formed of a non-magnetic material that covers the surface and supports the first core, the second core, and the permanent magnet.
From another point of view, in the present invention, with respect to the outer support member in the divided state, a plurality of first cores, a plurality of second cores, and a first pole are the first cores. A first permanent magnet is fitted between the first core and the second core so that the second pole faces toward the second core, and the first of the plurality of first cores adjacent to each other is fitted. A second permanent magnet is fitted between the iron cores, and a third permanent magnet is fitted between the adjacent second permanent magnets among the plurality of the second cores, and a plurality of inner support members in a divided state are fitted. The third core, the plurality of fourth cores, and the third core and the fourth core so that the first pole faces the third core and the second pole faces the fourth core. A fourth permanent magnet is fitted between them, and a fifth permanent magnet is fitted between the adjacent third cores of the plurality of the third cores, and the adjacent fourth cores of the plurality of the fourth cores are fitted. A sixth permanent magnet is fitted between them, a seventh permanent magnet is placed between the first core and the third core, and an eighth permanent magnet is placed between the second core and the fourth core. It is a method of assembling a magnetic pole element which constitutes a subunit by combining the outer support member in the divided state and the inner support member in the divided state.
Further, the inner support members in the divided state in the plurality of subunits may be joined to each other, and the outer support members in the divided state may be joined to each other.

According to the present invention, it is possible to provide a magnetic pole or the like that can support a magnet or an iron core without deteriorating the characteristics.

It is a figure which shows an example of the sectional view of the schematic structure of the electric motor which concerns on 1st Embodiment. (A) is a figure which shows an example of the shape which the magnetic monopole is seen in the axial direction from the armature side. (B) is a figure which shows an example of the shape which looked at the magnetic pole unit in the axial direction. (C) is a diagram showing an example of a shape of a support member viewed in the axial direction. It is a perspective view which shows an example of the structure of a magnetic pole unit. This is an example of a cross-sectional view in which a magnetic monopole is cut at a plane orthogonal to the rotation direction and a plane orthogonal to the radial direction. An example of a cross-sectional view is shown in the case where magnetic paths are formed in opposite directions to the teeth portions adjacent to each other in the radial direction. It is a figure which shows an example of the cross-sectional view in the case where the magnetic paths are formed in the opposite direction to each other in the tooth portions adjacent to each other in the rotation direction. It is a figure which shows an example of the fixing method of the other side support member. It is a figure which shows an example of the fixing method in the radial direction of a magnetic pole unit and a support member. It is a figure which shows an example of the sectional view of the schematic structure of the electric motor which concerns on 2nd Embodiment. It is a perspective view which shows an example of the structure of a magnetic pole unit. It is a figure which shows an example of the structure of a support member. It is a figure which shows an example of the assembly method of a magnetic monopole. It is a figure which shows an example of the assembly method of a magnetic monopole. This is an example of a cross-sectional view in which a magnetic monopole is cut at a plane orthogonal to the rotation direction and a plane orthogonal to the radial direction. An example of a cross-sectional view is shown in a case where magnetic circuits are formed in opposite directions in the teeth portions adjacent to each other in the radial direction, and magnetic paths are formed in opposite directions in the teeth portions facing in the axial direction. There is. An example is shown in which magnetic circuits are formed in opposite directions in the teeth portions adjacent to each other in the rotation direction, and magnetic paths are formed in opposite directions in the tooth portions facing in the axial direction. It is a figure which shows an example of the modification of a subunit. It is a figure which shows the deformation example of the combination part of one division member and another division member. It is a figure which shows the combination part of the 1st division member and the 2nd division member which constitute an outer support member. It is a figure which shows an example of the magnetic monopole fixed by shrink fitting. It is a figure which shows an example of the deformation example of a pair of protrusions of a support member, and an iron core. (A) is a diagram showing an example of deformation of a pair of protrusions, (b) is a diagram showing an example of deformation of an iron core and a permanent magnet, and (c) is a diagram showing an example of deformation of an iron core and a permanent magnet. It is a figure which shows an example of the state of being fitted in a pair of protrusions. (A) is a diagram showing an example of deformation of an iron core and a permanent magnet, and (b) is a diagram showing an example of a state in which an iron core and a permanent magnet are fitted into a pair of protrusions. (A) is a diagram showing an example of modification of the intermediate support member and the R second magnet, and (b) is a diagram showing an example of a state in which the intermediate support member and the R second magnet are fitted together. ..

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings.
<First Embodiment>
FIG. 1 is a diagram showing an example of a cross-sectional view of a schematic configuration of the motor 1 according to the first embodiment. FIG. 1 is a cross-sectional view of the I-I portion of FIG.
FIG. 2A is a diagram showing an example of the shape of the magnetic monopole 20 viewed from the armature 10 side in the axial direction. FIG. 2B is a diagram showing an example of the shape of the magnetic pole unit 30 as viewed in the axial direction. FIG. 2C is a diagram showing an example of the shape of the support member 50 as viewed in the axial direction.
FIG. 3 is a perspective view showing an example of the configuration of the magnetic pole unit 30.
The electric motor 1 is an axial gap type electric motor having a single stator structure, which includes an armature 10 for generating a magnetic field and a magnetic pole element 20 which is a rotor having a rotating shaft 5 of a soft magnetic material. The armature 10 and the magnetic pole 20 are each disk-shaped, and are arranged via a gap of a certain distance in the axial direction of the rotating shaft 5.

In the following description, the direction in which the magnetic monopole 20 moves may be referred to as a "rotational direction". Further, the direction from the center line of the rotating shaft 5 toward the outer peripheral surface of the rotating shaft 5 may be referred to as a "radial direction". Further, the axial direction of the rotating shaft 5 may be referred to as "axial direction". In the axial direction, one end side (upper side in FIG. 1) may be referred to as "one side", and the other end side (lower side in FIG. 1) may be referred to as "other side".

(Armature 10)
The armature 10 has a base member 11 and a coil 12 wound around the base member 11.
The base member 11 has a disk-shaped yoke portion 111 and a plurality of teeth portions 112 protruding in the axial direction from the other side surface in the axial direction of the yoke portion 111. The plurality of tooth portions 112 are arranged at equal intervals in the rotation direction. Each tooth portion 112 has a fan shape when viewed in the axial direction. The base member 11 is made of a soft magnetic material such as soft iron or soft ferrite. Further, the base member 11 has a bearing 113 at the center thereof that rotatably supports the rotating shaft 5.
The coil 12 is wound around each tooth portion 112.

(Monopole 20)
The magnetic pole element 20 has a plurality of magnetic pole units 30 (10 in this embodiment) arranged in the rotation direction, and a support member 50 for supporting the plurality of magnetic pole units 30.

The support member 50 includes an inner support member 51 provided on the inner side in the radial direction and an outer support member 52 provided on the outer side in the radial direction. The inner support member 51 is a cylindrical member, and the same number of inner protrusions 51a protruding outward from the outer peripheral surface are provided at one end in the axial direction as the number of magnetic pole units 30. The outer support member 52 is a cylindrical member, and the same number of outer protrusions 52a protruding inward from the inner peripheral surface are provided at one end in the axial direction as the number of magnetic pole units 30.

Further, the support member 50 includes a support member 53 on the other side provided on the other side in the axial direction. The other side support member 53 is a disk-shaped member having a through hole formed in the central portion through which the rotation shaft 5 passes. The inner diameter of the other side support member 53 is larger than the diameter of the inner peripheral surface of the inner support member 51 and smaller than the diameter of the outer peripheral surface of the inner support member 51. The outer diameter of the other side support member 53 is larger than the diameter of the inner peripheral surface of the outer support member 52 and smaller than the diameter of the outer peripheral surface of the outer support member 52.

The plurality of magnetic pole units 30 are supported by the inner protruding portion 51a and the outer protruding portion 52a on one side in the axial direction and by the other side support member 53 on the other side in the axial direction, so that the movement in the axial direction is suppressed. ..
The method of fixing the magnetic pole unit 30 and the support member 50 will be described in detail later.
The support member 50 is made of a non-magnetic material. For example, it can be exemplified that the support member 50 is made of aluminum, titanium, or resin.

The magnetic pole unit 30 includes a first inner block 31 on one side in the axial direction and provided inside in the radial direction, and a second inner block 32 on the other side in the axial direction and provided inside in the radial direction. It has a first outer block 41 on one side in the axial direction and provided on the outer side in the radial direction, and a second outer block 42 on the other side in the axial direction and provided on the outer side in the radial direction. There is.

The first inner block 31 is provided so as to hide each of the arcuate and flat plate-shaped soft magnetic iron core 311 and the four surfaces other than the inner peripheral surface and one side surface of the six surfaces of the iron core 311. It also has four permanent magnets 312. Each permanent magnet 312 has a main surface 313 having substantially the same size as one surface of the opposing iron core 311. Each permanent magnet 312 is arranged with the same magnetic pole facing the iron core 311.
One surface of the iron core 311 of the first inner block 31 opened so as to face the armature 10 becomes a rotor magnetic pole 315. The rotor magnetic pole 315 has the same magnetic pole as the magnetic pole of the main surface 313 in which each permanent magnet 312 faces the iron core 311. Further, the surface of each permanent magnet 312 facing the outside (the surface opposite to the main surface 313) is the opposite magnetic pole of the rotor magnetic pole 315.

The second inner block 32 is provided so as to hide each of the arcuate and flat plate-shaped soft magnetic iron core 321 and four of the six surfaces of the iron core 321 other than the inner peripheral surface and the other side surface. It also has four permanent magnets 322. Each permanent magnet 322 has a main surface 323 having substantially the same size as one surface of the opposing iron core 321. Each permanent magnet 322 is arranged with the same magnetic pole facing the iron core 321.

The first outer block 41 is provided so as to hide each of the arc-shaped and flat plate-shaped soft magnetic iron core 411 and the four surfaces other than the outer peripheral surface and one side surface of the six surfaces of the iron core 411. It has four permanent magnets 412. Each permanent magnet 412 has a main surface 413 having substantially the same size as one surface of the opposing iron core 411. Each permanent magnet 412 is arranged with the same magnetic pole facing the iron core 411.
One surface of the iron core 411 of the first outer block 41 that is open so as to face the armature 10 is a rotor magnetic pole 415. The rotor magnetic pole 415 has the same magnetic pole as the magnetic pole of the main surface 413 in which each permanent magnet 412 faces the iron core 411. Further, the surface of each permanent magnet 412 facing outward (the surface opposite to the main surface 413) is the opposite magnetic pole of the rotor magnetic pole 415.

The second outer block 42 is provided so as to hide each of the arc-shaped and flat plate-shaped soft magnetic iron core 421 and the four surfaces other than the outer peripheral surface and the other side surface of the six surfaces of the iron core 421. It has four permanent magnets 422. Each permanent magnet 422 has a main surface 423 having substantially the same size as one surface of the opposing iron core 421. Each permanent magnet 422 is arranged with the same magnetic pole facing the iron core 421.

Hereinafter, when it is not necessary to distinguish the first inner block 31, the second inner block 32, the first outer block 41, and the second outer block 42, they may be collectively referred to as "magnetic pole block 40". Further, when it is not necessary to distinguish between the iron core 311 and the iron core 321 and the iron core 411 and the iron core 421, they may be collectively referred to as "iron core 401". Further, when it is not necessary to distinguish between the permanent magnet 312, the permanent magnet 322, the permanent magnet 412, and the permanent magnet 422, they may be collectively referred to as "permanent magnet 402". When it is not necessary to distinguish between the rotor magnetic pole 315 and the rotor magnetic pole 415, they may be collectively referred to as "rotor magnetic pole 405".

It should be noted that the above-mentioned permanent magnets adjacent to each other, for example, permanent magnet 312 and permanent magnet 322, permanent magnet 412 and permanent magnet 422, permanent magnet 312 and permanent magnet 412, permanent magnet 322 and permanent magnet 422, permanent magnet 312 and permanent magnet. 312, permanent magnet 322 and permanent magnet 322, permanent magnet 412 and permanent magnet 412, permanent magnet 422 and permanent magnet 422 may be integrated. That is, the permanent magnet 312 and the permanent magnet 322 arranged between the iron core 311 and the iron core 321 may be integrated. Further, the permanent magnet 412 and the permanent magnet 422 arranged between the iron core 411 and the iron core 421 may be integrated. Further, the permanent magnet 312 and the permanent magnet 412 arranged between the iron core 311 and the iron core 411 may be integrated. Further, the permanent magnet 322 and the permanent magnet 422 arranged between the iron core 321 and the iron core 421 may be integrated. Further, the two permanent magnets 312 arranged between the adjacent iron cores 311 and the iron cores 311 may be integrated. Further, the two permanent magnets 322 arranged between the adjacent iron cores 321 and the iron cores 321 may be integrated. Further, the two permanent magnets 412 arranged between the adjacent iron cores 411 and the iron cores 411 may be integrated. Further, the two permanent magnets 422 arranged between the adjacent iron cores 421 and the iron cores 421 may be integrated.

The adjacent magnetic pole blocks 40 are arranged so that the surfaces are in contact with each other. Then, among the plurality of first inner blocks 31 and the first outer blocks 41 arranged so as to face the armature 10, the rotor magnetic poles 315 and 415 of the two adjacent magnetic pole blocks 40 are different magnetic poles from each other. .. That is, the first inner block 31 and the first outer block 41 are arranged so that the magnetic poles of the rotor magnetic poles 315 and 415 are alternately inverted. Therefore, of the plurality of first inner blocks 31 and first outer blocks 41, one of the contact surfaces of two adjacent magnetic pole blocks 40 has an S pole and the other has an N pole. Further, among the plurality of first inner blocks 31 and second inner blocks 32, one of the contact surfaces of the adjacent first inner block 31 and the second inner block 32 has an S pole and the other has an N pole. Further, among the plurality of first outer blocks 41 and second outer blocks 42, one of the contact surfaces of the adjacent first outer block 41 and the second outer block 42 has an S pole and the other has an N pole. Further, among the plurality of second inner blocks 32 and second outer blocks 42, one of the contact surfaces of the adjacent second inner block 32 and the second outer block 42 has an S pole and the other has an N pole. As a result, the two adjacent magnetic pole blocks 40 are attracted to each other by a magnetic force, so that a plurality of magnetic pole blocks 40 can be easily arranged.

In the magnetic pole 20 configured as described above, the rotor magnetic pole 315 of the first inner block 31 and the rotor magnetic pole 415 of the first outer block 41 face the armature 10 so as to be orthogonal to each other in the axial direction. Two of the four sides are arranged so that they face a direction orthogonal to the rotation direction and the other two sides face a direction orthogonal to the radial direction. As a result, the magnetic poles of the rotor magnetic poles 315 and the rotor magnetic poles 415 are inverted one by one in each of the rotation direction and the radial direction.
Further, the second inner block 32 is arranged so as to be in contact with the first inner block 31, and the second outer block 42 is arranged so as to be in contact with the first outer block 41. Then, in the second inner block 32 and the second outer block 42, two of the four side surfaces face in a direction orthogonal to the rotation direction, and the remaining two sides face in a direction orthogonal to the radial direction, respectively. Arranged like this.

The iron core 401 is magnetized by a permanent magnet 402 that surrounds it. Of the plurality of magnetic pole blocks 40, the magnetic flux generated from the permanent magnet 402 whose S pole faces the iron core 401 travels in the iron core 401. Since the permanent magnets 402 are attached to the four surfaces of the iron core 401, the magnetic fluxes generated from each of these four permanent magnets 402 travel inside the iron core 401, and the magnetic fluxes of the respective magnetic fluxes are axial toward the armature 10. It travels in the direction and exits from the rotor magnetic flux 405 into the gap between the armature 10 and the armature 10. The magnetic flux branches radially and enters the rotor magnetic pole 405 of the N pole of the adjacent magnetic pole blocks 40. Magnetic fluxes from all adjacent magnetic pole blocks 40 enter the N-pole rotor magnetic pole 405. Since the N pole of the permanent magnet 402 faces the iron core 401 which is the rotor magnetic pole 405 of the N pole, the magnetic flux further advances inside the iron core 401 and branches in the rotational direction, the radial direction, and the axial direction. And enter the permanent magnet 402.

FIG. 4 is an example of a cross-sectional view of the magnetic monopole 20 cut along a plane orthogonal to the rotation direction and a plane orthogonal to the radial direction. FIG. 4 is a cross-sectional view of the IV-IV portion of FIG. In FIG. 4, the arrow indicates the magnetization direction, and the polarity is S → N.
In the example shown in FIG. 4, among the plurality of first inner blocks 31, the magnetic flux generated from the permanent magnet 312 whose S pole faces the iron core 311 travels in the iron core 311. Since the permanent magnets 312 are attached to the four surfaces of the iron core 311, the magnetic fluxes emitted from each of these four permanent magnets 312 travel inside the iron core 311 and each magnetic flux is axial toward the armature 10. It travels in the direction and exits from the rotor magnetic flux 315 into the gap between the armature 10 and the armature 10. The magnetic flux branches radially and extends from the rotor pole 315 of the N pole of the adjacent first inner block 31 to the inside of the iron core 311 and from the rotor magnetic pole 415 of the N pole of the first outer block 41 to the inside of the iron core 411. Enter into. After that, the magnetic flux travels inside the iron core 311 and the iron core 411. Then, the magnetic flux that has traveled inside the iron core 311 further travels in the axial direction and branches in the rotational direction and the radial direction to enter the permanent magnet 312. Further, the magnetic flux that has traveled inside the iron core 411 further travels in the axial direction and branches in both directions in the rotational direction to enter the permanent magnet 412.

The rotor magnetic pole 405 has the same polarity as the magnetic pole of the permanent magnet 402 facing the iron core 401 including the rotor magnetic pole 405. That is, when the S pole of the permanent magnet 402 faces the iron core 401, the rotor magnetic pole 405 of the iron core 401 becomes the S pole, and when the N pole of the permanent magnet 402 faces the iron core 401, the iron core 401 The rotor magnetic pole 405 of is N pole.

FIG. 5 is a diagram showing an example of a cross-sectional view in which magnetic paths are formed in opposite directions to the tooth portions 112 adjacent to each other in the radial direction.
In the axial gap type motor 1 having the above configuration, when a reverse current is passed through the coils 12 adjacent to each other in the radial direction of the armature 10, a magnetic field is generated around the coils 12, as shown in FIG. , A magnetic path is formed through the teeth portion 112 and the yoke portion 111. At this time, the surface of the teeth portion 112 facing the magnetic monopole 20 becomes the armature magnetic pole 13. Of the two tooth portions 112 adjacent to each other in the radial direction, the armature magnetic pole 13 of one of the teeth portions 112 is the S pole, and the armature magnetic pole 13 of the other teeth portion 112 is the N pole.

FIG. 6 is a diagram showing an example of a cross-sectional view in which magnetic paths are formed in opposite directions to the teeth portions 112 adjacent to each other in the rotation direction.
In the example shown in FIG. 6, of the teeth portions 112 adjacent to each other in the rotation direction, the armature magnetic pole 13 of one of the teeth portions 112 is the S pole, and the armature magnetic pole 13 of the other teeth portion 112 is the N pole. ..

Therefore, when a current flows through the coil 12, the armature magnetic pole 13 and the rotor magnetic poles 315 and 415 are attracted or repelled by the magnetic force.
5 and 6 show a magnetic path when the armature magnetic pole 13 and the rotor magnetic poles 315 and 415 are attracted to each other.
Then, by controlling the direction and timing of the current flowing through the coil 12 of the armature 10, the rotation direction and rotation speed of the magnetic pole element 20 are controlled.

In the motor 1 according to the above-described embodiment, since each iron core 401 is surrounded by a permanent magnet 402, as compared with a rotor having a structure in which a conventional annular fan-shaped plate-shaped permanent magnet is arranged facing the armature. The magnetic flux generated in the rotor magnetic pole 405 is increased.

Next, a method of fixing the other side support member 53 will be described.
After fitting the plurality of magnetic pole units 30 into the gap between the inner protrusion 51a and the outer protrusion 52a from the other side in the axial direction, the other side support member 53 is fitted to the plurality of magnetic pole units 30 or the outer protrusions 30. It is fixed to at least one of 52a.

FIG. 7 is a diagram showing an example of a method of fixing the other side support member 53.
As shown in FIG. 7A, in the first outer block 41 and the second outer block 42 of each magnetic pole unit 30, an axial through hole 45 is formed in the central portion in the rotational direction and the radial direction, and the other side thereof. A female screw 531 is formed on the support member 53. Then, the male screw of the bolt 55 passed through the through hole 45 is tightened to the female screw 531 formed on the other side support member 53 to fix the magnetic pole unit 30 and the support member 50.
Instead of forming a female screw 531 on the other side support member 53, a through hole is formed, and a bolt 55 is passed through the through hole 45 formed on the magnetic pole unit 30 and the through hole formed on the other side support member 53. , May be tightened to a nut arranged on the other side surface of the other side support member 53.

Alternatively, as shown in FIG. 7B, a plurality of through holes 532 (for example, the same number as the number of magnetic pole units 30) are formed at equal intervals in a portion of the other side support member 53 facing the outer support member 52. , A female screw (not shown) is formed on the outer support member 52. Then, the magnetic pole unit 30 and the support member 50 may be fixed by tightening the male screw of the bolt 56 passed through the through hole 532 to the female screw formed on the outer support member 52.

Further, although not shown, a plurality of through holes (not shown) are formed at equal intervals in a portion of the other side support member 53 facing the inner support member 51 (for example, the same number as the number of magnetic pole units 30). , A female screw (not shown) is formed on the inner support member 51. Then, the magnetic pole unit 30 and the support member 50 may be fixed by tightening a male screw (not shown) of a bolt (not shown) passed through a through hole of the other side support member 53 to a female screw formed on the inner support member 51. ..

Alternatively, as shown in FIG. 7 (c), the fixing method shown in FIG. 7 (a) and the fixing method shown in FIG. 7 (b) may be combined.
It should be noted that fixing the other side support member 53 is not particularly limited to tightening with bolts 55 or 56. For example, the other side support member 53 and the outer support member 52, the inner support member 51, the second outer block 42, and the second inner block 32 may be fixed by welding or adhesion.

FIG. 8 is a diagram showing an example of a method of fixing the magnetic pole unit 30 and the support member 50 in the radial direction.
As shown in FIG. 8A, a through hole (not shown) is formed in a portion of the outer support member 52 facing the iron core 411 of each first outer block 41, and a female screw (not shown) is formed in the iron core 411. To form. Then, the magnetic pole unit 30 and the support member 50 may be fixed by tightening the male screw of the bolt 57 passed through the through hole formed in the outer support member 52 to the female screw formed in the iron core 411.
Instead of the iron core 411 of the first outer block 41, bolts 57 may be tightened to the iron core 421 of the second outer block 42, and in addition to the iron core 411 of the first outer block 41, the second outer block 42 Bolts 57 may be tightened to the iron core 421.

Alternatively, as shown in FIG. 8B, a through hole (not shown) is formed in a portion of the inner support member 51 facing the iron core 311 of each first inner block 31, and a female screw (not shown) is formed in the iron core 311. (Illustrated) is formed. Then, the magnetic pole unit 30 and the support member 50 may be fixed by tightening the male screw of the bolt 58 passed through the through hole formed in the inner support member 51 to the female screw formed in the iron core 311.
Instead of the iron core 311 of the first inner block 31, bolts 58 may be tightened to the iron core 321 of the second inner block 32, and in addition to the iron core 311 of the first inner block 31, the second inner block 32 Bolts 58 may be tightened to the iron core 321.

Alternatively, as shown in FIG. 8C, a through hole (non-perforated) is formed in the outer support member 52 at a portion of the outer support member 52 facing the permanent magnet 412 arranged between the iron core 411 and the iron core 411 of each first outer block 41. A female screw (not shown) is formed on the permanent magnet 412 while forming (not shown). Then, the magnetic pole unit 30 and the support member 50 may be fixed by tightening the male screw of the bolt 57 passed through the through hole formed in the outer support member 52 to the female screw formed in the permanent magnet 412.
Instead of the permanent magnet 412 arranged between the iron core 411 and the iron core 411 of the first outer block 41, a bolt is attached to the permanent magnet 422 arranged between the iron core 421 and the iron core 421 of the second outer block 42. 57 may be tightened, and in addition to the permanent magnet 412 arranged between the iron core 411 and the iron core 411, a bolt is attached to the permanent magnet 422 arranged between the iron core 421 and the iron core 421 of the second outer block 42. 57 may be tightened.

Alternatively, instead of forming the female thread on the iron core 411, a recess (not shown) recessed from the outer peripheral surface is formed instead of the embodiment described with reference to FIG. 8 (a), and as shown in FIG. 8 (d). The magnetic pole unit 30 and the support member 50 may be fixed by fitting a columnar pin 59 into the through hole formed in the outer support member 52 and the recess formed in the iron core 411.
Instead of the iron core 411 of the first outer block 41, the pin 59 may be fitted into the iron core 421 of the second outer block 42, or in addition to the iron core 411 of the first outer block 41, the second outer block 42 may be fitted. The pin 59 may also be fitted into the iron core 421.

The embodiments described with reference to FIGS. 8 (a) to 8 (d) may be appropriately combined. For example, as shown in FIG. 8 (e), the male screw of the bolt 57 passed through the through hole formed in the outer support member 52 is tightened to the female screw formed in the iron core 411, and is formed in the inner support member 51. The magnetic pole unit 30 and the support member 50 may be fixed by tightening the male screw of the bolt 58 passed through the through hole to the female screw formed on the iron core 311.
Alternatively, as shown in FIG. 8 (f), in addition to the embodiment shown in FIG. 8 (e), the male screw of the bolt 57 passed through the through hole formed in the outer support member 52 is further attached to the permanent magnet 412. The magnetic pole unit 30 and the support member 50 may be fixed by tightening to the formed female screw.

The fixing of the inner support member 51 and the outer support member 52 and the magnetic pole unit 30 is not particularly limited to tightening with bolts 57 and 58 and fitting of pins 59. For example, the inner support member 51, the outer support member 52, and the magnetic pole unit 30 may be fixed by welding or adhesion.

As described above, in the magnetic pole element 20, the iron core 311 as an example of the first iron core, the iron core 321 as an example of the second iron core, and the S pole as an example of the first pole face toward the iron core 311. As an example of the second pole, a permanent magnet (for example, permanent magnets 312 and 322) arranged so that the N pole faces the iron core 321 is provided. Further, the magnetic pole element 20 covers at least one surface of the iron core 311 and the iron core 321 that does not face the armature 10 and the surface that does not face the permanent magnet (for example, the permanent magnets 312 and 322), and also covers the iron core 311 and the iron core 321. It comprises a support member 50 molded from a non-magnetic material that supports 321 and a permanent magnet (eg, permanent magnets 312, 322). For example, the inner support member 51 covers the inner peripheral surfaces of the iron core 311 and the iron core 321 and suppresses the movement of the iron core 311 and the iron core 321 inward. Further, the other side support member 53 covers the other side surface in the axial direction of the iron core 321 that does not face the armature 10, and the inner protrusion 51a of the inner support member 51 and the other side support member 53 form the iron core 311. , The iron core 321 and the permanent magnet (for example, the permanent magnets 312 and 322) are suppressed from moving in the axial direction.

Further, the magnetic pole element 20 includes an iron core 411 as an example of the first iron core, an iron core 421 as an example of the second iron core, and a permanent magnet (for example, a permanent magnet 421, 422). Further, the magnetic pole element 20 covers at least one surface of the iron core 411 and the iron core 421 that does not face the armature 10 and the surface that does not face the permanent magnet (for example, the permanent magnets 421 and 422), and also covers the iron core 411 and the iron core 421. Includes a support member 50 molded from a non-magnetic material that supports the 421 and permanent magnets (eg, permanent magnets 421 and 422). For example, the outer support member 52 covers the inner peripheral surfaces of the iron core 411 and the iron core 421, and suppresses the iron core 411 and the iron core 421 from moving to the outside. Further, the other side support member 53 covers the other side surface in the axial direction of the iron core 421 that does not face the armature 10, and the outer protrusion 52a of the outer support member 52 and the other side support member 53 form the iron core 411. , The iron core 421 and the permanent magnets (eg, permanent magnets 421 and 422) are prevented from moving in the axial direction.

In this way, the support member 50 covers the surface of the iron core 311, 321, 411, 421 where the magnetic flux that does not contribute to the output leaks. As a result, it is possible to prevent the magnetic material from coming into close contact with or coming into contact with the surface. As a result, it is possible to suppress the leakage of the magnetic flux that does not contribute to the output from the iron cores 311, 321 and 411, 421, and the decrease of the magnetic flux that contributes to the output, that is, the magnetic flux toward the armature 10. Therefore, according to the magnetic monopole 20, the magnetic efficiency of the electric motor 1 can be improved.

<Second embodiment>
FIG. 9 is a diagram showing an example of a schematic configuration of the motor 2 according to the second embodiment.
FIG. 10 is a perspective view showing an example of the configuration of the magnetic pole unit 70.
The electric motor 2 is an axial gap type electric motor having a double stator structure, which includes two armatures 10 for generating a magnetic field and a magnetic pole element 60 which is a rotor having a rotating shaft 5. Hereinafter, the points different from the first embodiment will be described. In the first embodiment and the second embodiment, the same reference numerals are used for the same ones, and detailed description thereof will be omitted.
The two armatures 10 are arranged so as to be symmetrical with respect to planes orthogonal to the axial direction.

The magnetic poles 60 have a plurality of (10 in this embodiment) magnetic pole units 70 arranged in the rotation direction.
The magnetic pole unit 70 has an iron core 71 corresponding to the iron core 311, an iron core 72 corresponding to the iron core 321 and an iron core 73 corresponding to the iron core 411, and an iron core 74 corresponding to the iron core 421. Further, the magnetic pole unit 70 includes a Z inner magnet 81 which is a permanent magnet arranged between the iron core 71 and the iron core 72, and a Z outer magnet 82 which is a permanent magnet arranged between the iron core 73 and the iron core 74. have. Further, the magnetic pole unit 70 includes an R first magnet 83, which is a permanent magnet arranged between the iron core 71 and the iron core 73, and an R second magnet, which is a permanent magnet arranged between the iron core 72 and the iron core 74. It has 84 and. Further, the magnetic pole unit 70 includes a θ first inner magnet 85, which is a permanent magnet arranged between the iron core 71 and the iron cores 71 of the adjacent magnetic pole units 70, the iron core 72, and the iron core 72 of the adjacent magnetic pole units 70. It has a θ second inner magnet 86 which is a permanent magnet arranged between and. Further, the magnetic pole unit 70 includes a θ first outer magnet 87, which is a permanent magnet arranged between the iron core 73 and the iron cores 73 of the adjacent magnetic pole units 70, the iron core 74, and the iron core 74 of the adjacent magnetic pole units 70. It has a θ second outer magnet 88 which is a permanent magnet arranged between and.

The Z-inner magnet 81 corresponds to a permanent magnet in which a permanent magnet 312 and a permanent magnet 322 are arranged between the iron core 311 and the iron core 321 according to the first embodiment. The Z outer magnet 82 corresponds to a permanent magnet in which a permanent magnet 412 and a permanent magnet 422 are integrated, which is arranged between the iron core 411 and the iron core 421 according to the first embodiment. The R first magnet 83 corresponds to a permanent magnet in which a permanent magnet 312 and a permanent magnet 412 are integrated, which is arranged between the iron core 311 and the iron core 411 according to the first embodiment. The R second magnet 84 corresponds to a permanent magnet in which a permanent magnet 322 and a permanent magnet 422 are integrated, which is arranged between the iron core 321 and the iron core 421 according to the first embodiment.

The θ1 first inner magnet 85 corresponds to a permanent magnet in which two permanent magnets 312 are integrated, which are arranged between adjacent iron cores 311 according to the first embodiment. The θ second inner magnet 86 corresponds to a permanent magnet in which two permanent magnets 322 are integrated, which are arranged between adjacent iron cores 321 according to the first embodiment. The θ first outer magnet 87 corresponds to a permanent magnet in which two permanent magnets 412 are integrated, which are arranged between adjacent iron cores 411 according to the first embodiment. The θ second outer magnet 88 corresponds to a permanent magnet in which two permanent magnets 422 are integrated, which are arranged between adjacent iron cores 421 according to the first embodiment.

The iron core 71 and the iron core 72 have a symmetrical shape with respect to a plane orthogonal to the axial direction. A recess 711 recessed from one side surface over the entire rotation direction is formed inside the iron core 71 on one side, and a recess 711 on the other side of the iron core 72 is formed on the other side over the entire rotation direction. A recess 721 recessed from the surface is formed. Inside the other side of the iron core 71, a recess (not shown) recessed from the other side surface is formed in the central portion in the rotation direction, and inside the one side of the iron core 72, one side is formed in the central portion in the rotation direction. A recess 722 recessed from the surface of the surface is formed.

The iron core 73 and the iron core 74 have a symmetrical shape with respect to a plane orthogonal to the axial direction. A recess 731 recessed from one side surface over the entire rotation direction is formed on the outside of one side of the iron core 73, and the other side is formed on the outside of the other side of the iron core 74 over the entire rotation direction. A recess 741 recessed from the surface is formed. On the outside of the other side of the iron core 73, a recess 732 recessed from the other side surface is formed in the central portion in the rotation direction, and on the outside of one side of the iron core 74, the central portion in the rotation direction is formed from one side surface. A recessed recess 742 is formed.
One surface of the iron cores 71 to 74 that is open so as to face the armature 10 is a rotor magnetic pole 75. The rotor magnetic pole 75 has the same magnetic pole as the magnetic pole on the main surface where each permanent magnet faces the iron cores 71 to 74.

The diameter of the inner peripheral surface of the Z inner magnet 81 is the same as the diameter of the inner peripheral surface of the iron core 71, and the diameter of the outer peripheral surface of the Z inner magnet 81 is the same as the diameter of the outer peripheral surface of the iron core 71. The size of the magnet 81 in the Z in the rotation direction is larger than the size of the iron core 71 in the rotation direction.
The diameter of the inner peripheral surface of the Z outer magnet 82 is the same as the diameter of the inner peripheral surface of the iron core 73, and the diameter of the outer peripheral surface of the Z outer magnet 82 is the same as the diameter of the outer peripheral surface of the iron core 73. The size of the Z outer magnet 82 in the rotation direction is larger than the size of the iron core 73 in the rotation direction.

The diameter of the inner peripheral surface of the R first magnet 83 is the same as the diameter of the outer peripheral surface of the iron core 71, and the magnitude of the rotation direction of the inner peripheral surface of the R first magnet 83 is the rotation direction of the outer peripheral surface of the iron core 71. Is the same size as. Further, the axial size of the inner peripheral surface of the R first magnet 83 is the same as the axial size of the outer peripheral surface of the iron core 71. Further, the diameter of the outer peripheral surface of the R first magnet 83 is the same as the diameter of the inner peripheral surface of the iron core 73, and the size of the outer peripheral surface of the R first magnet 83 in the rotation direction is the inner peripheral surface of the iron core 73. It is the same as the size in the rotation direction. Further, the axial size of the outer peripheral surface of the R first magnet 83 is the same as the axial size of the inner peripheral surface of the iron core 73. The both end faces in the axial direction of the R first magnet 83 have the same shape. The R first magnet 83 is provided with convex portions 831 protruding in the rotational direction from both end faces in the rotational direction.

The shape of the R second magnet 84 is the same as the shape of the R first magnet 83, and detailed description thereof will be omitted.
The R first magnet 83 and the R second magnet 84 are arranged so that the end face on the other side in the axial direction of the R first magnet 83 and the end face on the one side in the axial direction of the R second magnet 84 come into contact with each other. Magnet. As a result, the end face on one side in the axial direction of the R first magnet 83 is located on the other side of the end face on one side in the axial direction of the iron core 71. Further, the end face on the other side in the axial direction of the R second magnet 84 is located on one side of the end face on the other side in the axial direction of the iron core 71.

The θ first inner magnet 85 has a substantially linear shape, and the size in the radial direction is larger than the size in the radial direction in the iron core 71. At the outer end of the θ1 first inner magnet 85, convex portions 851 protruding in the rotational direction from both end faces in the rotational direction are provided. The axial size of the θ first inner magnet 85 is smaller than the axial size of the iron core 71. The size of the θ1 first inner magnet 85 in the rotation direction is smaller than the size of the iron core 71 in the rotation direction.
The shape of the θ second inner magnet 86 is the same as the shape of the θ first inner magnet 85, and detailed description thereof will be omitted.

The θ first outer magnet 87 has a substantially linear shape, and its radial size is larger than the radial size of the iron core 73. At the inner end of the θ1 first outer magnet 87, convex portions 871 protruding in the rotational direction from both end faces in the rotational direction are provided. The axial size of the θ first outer magnet 87 is smaller than the axial size of the iron core 73. The size of the θ first outer magnet 87 in the rotation direction is smaller than the size of the iron core 73 in the rotation direction.
The shape of the θ second outer magnet 88 is the same as the shape of the θ first outer magnet 87, and detailed description thereof will be omitted.

(Support structure)
Further, the magnetic monopole 60 includes a support member 100 that supports a plurality of magnetic pole units 70. Further, the magnetic pole element 60 is the R first magnet 83 of the magnetic pole unit 70 adjacent to each other between the θ 1st inner magnet 85 and the θ 2nd inner magnet 86 and the θ 1st outer magnet 87 and the θ 2nd outer magnet 88. And a rectangular parallelepiped intermediate support member 151 arranged in the gap between the R second magnets 84 is provided. Further, the magnetic monopole 60 is arranged on one side in the axial direction of the R first magnet 83, the θ first inner magnet 85, and the θ first outer magnet 87, and these magnets move to one side in the axial direction. The first Rθ magnet holding member 152 is provided. Further, the magnetic monopole 60 is arranged on the other side in the axial direction of the R second magnet 84, the θ second inner magnet 86, and the θ second outer magnet 88, and these magnets move to the other side in the axial direction. The second Rθ magnet holding member 153 is provided. Further, the magnetic monopole 60 is arranged in the recess 711 of the iron core 71, and is arranged in the first inner core restraining member 154 that suppresses the movement of the iron core 71 to one side in the axial direction, and in the recess 721 of the iron core 72. The second inner core holding member 155 that suppresses the movement of the iron core 72 to the other side in the axial direction is provided. Further, the magnetic monopole 60 is arranged in the recess 731 of the iron core 73, and is arranged in the first outer core restraining member 156 that suppresses the movement of the iron core 73 to one side in the axial direction, and in the recess 741 of the iron core 74. The second outer core holding member 157 that suppresses the movement of the iron core 74 to the other side in the axial direction is provided.

FIG. 11 is a diagram showing an example of the configuration of the support member 100.
The support member 100 includes an inner support member 110 provided on the inner side in the radial direction and an outer support member 120 provided on the outer side in the radial direction.
The inner support member 110 is a cylindrical member, and has a pair of protrusions 150 protruding outward from the outer peripheral surface in the same number as the magnetic pole unit 70. Further, the inner support member 110 has two convex portions 155 protruding outward from the outer peripheral surface in the central portion in the axial direction between the pair of projection groups 150, in the same number as the magnetic pole unit 70. The inner support member 110 is formed so as to be split into a plurality of members in the rotational direction, and by combining these plurality of members, the inner support member 110 becomes cylindrical. FIG. 11 shows a state in which the inner support members 110 that can be divided into a plurality of pieces are combined.

The outer support member 120 is a cylindrical member, and has a pair of protrusions 130 protruding inward from the inner peripheral surface in the same number as the magnetic pole unit 70. Further, the outer support member 120 has two convex portions 140 protruding inward from the inner peripheral surface in the central portion in the axial direction between the pair of projection groups 130, as many as the magnetic pole unit 70. The outer support member 120 is formed so as to be split into a plurality of members in the rotational direction, and by combining these plurality of members, the outer support member 120 becomes cylindrical. FIG. 11 shows a state in which the outer support members 120 that can be divided into a plurality of pieces are combined.

Since the pair of protrusions 130 and the pair of protrusions 150 are the same, the pair of protrusions 130 will be described as a representative.
The pair of protrusions 130 includes a left side protrusion group 131 located on the left side when viewed from the center of the rotation shaft 5, and a right side protrusion group 132 located on the right side.
The left side protrusion group 131 includes four rectangular parallelepiped protrusions arranged from one side to the other in the axial direction, that is, the first left side protrusion 131a, the second left side protrusion 131b, the third left side protrusion 131c, and the fourth left side protrusion 131d. Have.
The right side protrusion group 132 includes four rectangular parallelepiped protrusions arranged from one side to the other side in the axial direction, that is, a first right side protrusion 132a, a second right side protrusion 132b, a third right side protrusion 132c, and a fourth right side protrusion 132d. Have.

For example, the distance between the second left side protrusion 131b and the second right side protrusion 132b is the same as the size of the iron core 73 in the rotation direction, and smaller than the size of the Z outer magnet 82 in the rotation direction. The axial size between the second left side protrusion 131b and the second right side protrusion 132b and the third left side protrusion 131c and the third right side protrusion 132c is the same as the axial size of the Z outer magnet 82. Then, the Z outer magnet 82 is fitted between the second left side protrusion 131b and the second right side protrusion 132b and the third left side protrusion 131c and the third right side protrusion 132c, and the movement in the axial direction is suppressed. The iron core 73 is located between the first left side protrusion 131a and the second left side protrusion 131b and the first right side protrusion 132a and the second right side protrusion 132b, and is arranged on one side of the Z outer magnet 82. At that time, the convex portion on one side of the two convex portions 140 is housed in the concave portion 731 of the iron core 73. The iron core 74 is located between the third left projection 131c and the fourth left projection 131d and the third right projection 132c and the fourth right projection 132d, and is arranged on the other side of the Z outer magnet 82. At that time, the convex portion on the other side of the two convex portions 140 is accommodated in the concave portion 741 of the iron core 74.

The first left side protrusion 131a of the pair of protrusions 130, the first right side protrusion 132a of the pair of adjacent protrusions 130, the second left side protrusion 131b of the pair of protrusions 130, and the second of the pair of adjacent protrusions 130. The axial size between the two right side protrusions 132b is the same as the axial size of the θ first outer magnet 87. Further, the magnitude in the rotation direction between the first left projection 131a of the pair of projections 130 and the first right projection 132a of the pair of adjacent projections 130 is the magnitude in the rotation direction of the θ first outer magnet 87. Smaller than that. From these, the θ first outer magnet 87 includes the first left projection 131a of the pair of projection groups 130, the first right projection 132a of the pair of adjacent projection groups 130, and the second left projection 131b of the pair of projection groups 130. And, it is fitted between the second right side protrusion 132b of the pair of adjacent protrusions 130, and the movement in the axial direction is suppressed. The biconvex portion 871 provided on the θ first outer magnet 87 is located inside, for example, the first left projection 131a of the pair of projection groups 130 and the first right projection 132a of the pair of adjacent projection groups 130. do.

Similarly, the third left projection 131c of the pair of projections 130 and the third right projection 132c of the pair of adjacent projections 130, the fourth left projection 131d of the pair of projections 130, and the pair of adjacent projections The axial size of the 130 with the fourth right projection 132d is the same as the axial size of the θ second outer magnet 88. Further, the magnitude in the rotation direction between the third left projection 131c of the pair of projections 130 and the third right projection 132c of the pair of adjacent projections 130 is the magnitude in the rotation direction of the θ second outer magnet 88. Smaller than that. From these, the θ second outer magnet 88 includes the third left projection 131c of the pair of projection groups 130, the third right projection 132c of the pair of adjacent projection groups 130, and the fourth left projection 131d of the pair of projection groups 130. And, it is fitted between the fourth right side protrusion 132d of the pair of adjacent protrusions 130, and the movement in the axial direction is suppressed.

As described above, the outer support member 120 has the pair of protrusions 130 to hold the Z outer magnet 82, the θ first outer magnet 87, and the θ second outer magnet 88.
Similarly, the inner support member 110 has a pair of protrusions 150 to hold the Z inner magnet 81, the θ first inner magnet 85, and the θ second inner magnet 86. The relative size of the pair of protrusions 150 of the inner support member 110 and the Z inner magnet 81, the θ first inner magnet 85 and the θ second inner magnet 86 is the pair of protrusions 130 of the outer support member 120. And, since it is the same as the relationship of the relative magnitude between the Z outer magnet 82, the θ first outer magnet 87 and the θ second outer magnet 88, detailed description thereof will be omitted.

(Assembly method)
12 and 13 are views showing an example of a method of assembling the magnetic monopole 60.
First, as shown in FIG. 12 (b), the iron core 73, the iron core 74, and the Z outer magnet 82 are fitted into the outer support member 120 in the divided state shown in FIG. 12 (a).
After that, as shown in FIG. 12 (c), the θ first outer magnet 87 and the θ second outer magnet 88 are fitted.
After that, as shown in FIG. 12D, the R first magnet 83 is arranged inside the iron core 73, and the R second magnet 84 is arranged inside the iron core 74. Then, in the figure, the inner support member 110 in the divided state incorporates the iron core 71, the iron core 72, the Z inner magnet 81, the θ first inner magnet 85, and the θ second inner magnet 86 in advance. As shown in 13 (a), the R first magnet 83 and the R second magnet 84 are sandwiched.

After that, as shown in FIG. 13B, an intermediate support member is formed in the gap between the θ1 outer magnet 87 and the θ2 outer magnet 88 and the θ1 inner magnet 85 and the θ2 inner magnet 86. 151 is inserted from the axial direction.
After that, as shown in FIG. 13C, the first Rθ magnet holding member 152 and the second Rθ magnet holding member 153 are fixed to the intermediate support member 151 from both sides in the axial direction, and the R first magnet 83 and the R second magnet are fixed. It covers the axial end faces of the magnet 84, the θ first inner magnet 85, the θ second inner magnet 86, the θ first outer magnet 87, and the θ second outer magnet 88. The method of fixing the first Rθ magnet holding member 152 and the second Rθ magnet holding member 153 to the intermediate support member 151 is a method of screwing with bolts or screws, or a method of joining by welding, welding, or adhesion. It can be exemplified.

After that, as shown in FIG. 13D, the first inner core holding member 154 that holds the recess 711 in the iron core 71 is fixed to the inner support member 110. Further, the second inner core holding member 155 that holds the recess 721 in the iron core 72 is fixed to the inner support member 110. Further, the first outer core holding member 156 that holds the recess 731 in the iron core 73 is fixed to the outer support member 120. Further, the second outer core holding member 157 that holds the recess 741 in the iron core 74 is fixed to the outer support member 120.
A method of fixing the first inner core holding member 154 and the second inner core holding member 155 to the inner support member 110, and the first outer core holding member 156 and the second outer core holding member 157 to the outer support member 120. Examples of the fixing method include a method of screwing with bolts and screws, and a method of joining by welding, welding, and adhesion.
As a result, the subunit 60a is completed.

Then, in the subunits 60a assembled in the same manner, the inner support members 110 in the divided state and the outer support members 120 in the divided state are combined. At that time, the magnetic pole unit 70 that is not fitted in the inner support member 110 and the outer support member 120 is sandwiched between one subunit 60a and the other subunit 60a. Alternatively, after combining the inner support members 110 in the split state and the outer support members 120 in the split state, each component such as the iron core 71 constituting the magnetic pole unit 70 may be fitted. Then, after combining the subunits 60a, the inner support members 110 and the outer support members 120 are joined to complete the magnetic monopole 60. It can be exemplified that the method of joining the inner support members 110 to each other and the outer support members 120 to each other is welding, welding, and adhesion.

That is, in the above assembly method, first, with respect to the outer support member 120 in the divided state, the iron core 73 as an example of the plurality of first iron cores, the iron core 74 as an example of the plurality of second iron cores, and the first. A Z outer magnet 82 as an example of the first permanent magnet is fitted between the iron core 73 and the iron core 74 so that the first pole faces the iron core 73 and the second pole faces the iron core 74. After that, the θ1 outer magnet 87 as an example of the second permanent magnet is fitted between the adjacent iron cores 73 among the plurality of iron cores 73, and the third permanent magnet is inserted between the adjacent iron cores 74 among the plurality of iron cores 74. The θ second outer magnet 88 as an example of the magnet is fitted.
On the other hand, with respect to the inner support member 110 in the divided state, the iron core 71 as an example of the plurality of third iron cores, the iron core 72 as an example of the plurality of fourth iron cores, and the iron core 71 as the first pole are used. The Z-inner magnet 81 as an example of the fourth permanent magnet is fitted between the iron core 71 and the iron core 72 so that the second pole faces toward the iron core 72 as it faces. After that, the θ 1st inner magnet 85 as an example of the 5th permanent magnet is fitted between the adjacent iron cores 71 among the plurality of iron cores 71, and the 6th permanent magnet is inserted between the adjacent iron cores 72 among the plurality of iron cores 72. The θ second inner magnet 86 as an example of the magnet is fitted.
Then, the R first magnet 83 as an example of the seventh permanent magnet is arranged between the iron core 73 and the iron core 71, and the R second magnet 84 as an example of the eighth permanent magnet is arranged between the iron core 74 and the iron core 72. Is arranged, and the subunit 60a is configured by combining the outer support member 120 in the divided state and the inner support member 110 in the divided state.
Then, the inner support members 110 in the divided state are joined to each other in the plurality of subunits 60a, and the outer support members 120 in the divided state are joined to each other.

FIG. 14 is an example of a cross-sectional view of the magnetic monopole 60 cut at a plane orthogonal to the rotation direction and a plane orthogonal to the radial direction. In FIG. 14, the arrow indicates the magnetization direction, and the polarity is S → N.
In the example shown in FIG. 14, the magnetic flux generated from the permanent magnet whose S pole faces the iron cores 71 and 73 travels in the iron core, and each magnetic flux is axially directed toward the armature 10 provided on one side. From the rotor magnetic flux 75 to the gap between the armature 10 and the armature 10. The magnetic flux branches radially, enters the inside of the iron core from the rotor magnetic poles 75 of the N poles of the adjacent iron cores 71 and 73, and travels inside the iron core. Then, the magnetic flux that has traveled inside the iron core branches in the rotational direction and the radial direction, and further travels in the axial direction to enter the Z inner magnet 81 or the Z outer magnet 82. The magnetic flux entering the Z inner magnet 81 travels on the iron core 72 provided on the other side, and the permanent magnets provided around the iron core 72 have the S pole facing the iron core 72. The magnetic flux generated from the permanent magnet travels in the iron core 72. Then, each magnetic flux travels axially toward the armature 10 provided on the other side and exits from the rotor magnetic pole 75 into the gap between the armature 10 and the armature 10. Further, the magnetic flux entering the Z outer magnet 82 travels on the iron core 74 provided on the other side, and the permanent magnet provided around the iron core 74 has the S pole facing the iron core 74. The magnetic flux generated from these permanent magnets travels in the iron core 74. Then, each magnetic flux travels axially toward the armature 10 provided on the other side and exits from the rotor magnetic pole 75 into the gap between the armature 10 and the armature 10.
Since the N-pole permanent magnet faces the iron core 72 provided on the other side of the iron core 71 facing the S-pole permanent magnet, the magnetic flux invading from the adjacent iron cores 72 and 74 is on one side in the axial direction. Proceed to, and enter the inside of the iron core 71.

FIG. 15 shows a cross section in which magnetic paths are formed in opposite directions to the teeth portions 112 adjacent to each other in the radial direction, and magnetic paths are formed in opposite directions to the teeth portions 112 facing in the axial direction. An example of the figure is shown.
In the electric machine 2, when a current in the opposite direction is passed through the coils 12 adjacent to each other in the radial direction of the armature 10 and a current in the same direction is passed through the coils 12 facing in the axial direction, the teeth portion 112 as shown in FIG. And a magnetic path passing through the yoke portion 111 is formed. As a result, of the two tooth portions 112 adjacent to each other in the radial direction, the armature magnetic pole 13 of one of the teeth portions 112 becomes the S pole, and the armature magnetic pole 13 of the other teeth portion 112 becomes the N pole. Further, the armature magnetic pole 13 of the teeth portion 112 facing the teeth portion 112 in which the armature magnetic pole 13 is the S pole is the N pole.

FIG. 16 shows an example in which magnetic paths are formed in opposite directions to the teeth portions 112 adjacent to each other in the rotation direction, and magnetic paths are formed in opposite directions to the teeth portions 112 facing in the axial direction. Is shown.
In the example shown in FIG. 16, among the teeth portions 112 adjacent to each other in the rotation direction, the armature magnetic pole 13 of one of the teeth portions 112 is the S pole, and the armature magnetic pole 13 of the other teeth portion 112 is the N pole. .. Further, the armature magnetic pole 13 of the teeth portion 112 facing the teeth portion 112 in which the armature magnetic pole 13 is the S pole is the N pole.

Therefore, when a current flows through the coil 12, the armature magnetic pole 13 and the rotor magnetic pole 75 are attracted or repelled by the magnetic force.
15 and 16 show a magnetic path when the armature magnetic pole 13 and the rotor magnetic pole 75 are attracted to each other.
Then, by controlling the direction and timing of the current flowing through the coil 12 of the armature 10, the rotation direction and rotation speed of the magnetic pole element 60 are controlled.

As described above, the magnetic monopole 60 according to the second embodiment includes an iron core 71 as an example of the first iron core, an iron core 72 as an example of the second iron core, and a magnet 81 in Z. Further, the magnetic pole element 60 covers at least one surface of the iron core 71 and the iron core 72 that does not face the armature 10 and the surface that does not face the Z inner magnet 81, and also covers the iron core 71, the iron core 72, and the Z inner magnet 81. A support member 100 formed of a non-magnetic material to support is provided. For example, the inner support member 110 covers the inner peripheral surfaces of the iron core 71 and the iron core 72, and suppresses the movement of the iron core 71, the iron core 72, and the Z inner magnet 81 inward. Further, the first inner core holding member 154 and the second inner core holding member 155 suppress the movement of the iron core 71, the iron core 72, and the Z inner magnet 81 in the axial direction.

Further, the magnetic pole element 60 includes an iron core 73 as an example of the first iron core, an iron core 74 as an example of the second iron core, and a Z outer magnet 82. Further, the magnetic pole element 60 covers at least one surface of the iron core 73 and the iron core 74 that does not face the armature 10 and the surface that does not face the Z outer magnet 82, and also covers the iron core 73, the iron core 74, and the Z outer magnet 82. A support member 100 formed of a non-magnetic material to support is provided. For example, the outer support member 120 covers the outer peripheral surfaces of the iron core 73 and the iron core 74, and suppresses the movement of the iron core 73, the iron core 74, and the Z outer magnet 82 to the outside. Further, the first outer core holding member 156 and the second outer core holding member 157 suppress the movement of the iron core 73, the iron core 74, and the Z outer magnet 82 in the axial direction.

In this way, the support member 100 covers the surface of the iron cores 71, 72, 73, 74 where the magnetic flux that does not contribute to the output leaks. As a result, it is possible to prevent the magnetic material from coming into close contact with or coming into contact with the surface. As a result, it is possible to suppress the leakage of the magnetic flux that does not contribute to the output from the iron cores 71, 72, 73, 74, and the decrease of the magnetic flux that contributes to the output, that is, the magnetic flux toward the armature 10. Therefore, according to the magnetic monopole 60, the magnetic efficiency of the electric motor 2 can be improved.

The outer support member 120 has the second left side protrusion 131b and the third left side protrusion 131c of the left side protrusion group 131 as an example of a plurality of protrusions that prevent the Z outer magnet 82 from moving toward the iron core 73 or the iron core 74. It has a second right projection 132b and a third right projection 132c of the right projection group 132. As a result, the outer support member 120 can support the Z outer magnet 82.
Further, the plurality of protrusions are the second left side protrusion 131b and the second right side protrusion as an example of the first surface side protrusion, which is a protrusion arranged on one side of the Z outer magnet 82 as an example of the first surface. The third left projection 131c and the third right projection 132c as an example of the second surface side projection which is a projection arranged on the other side surface side as an example of the second surface of the Z outer magnet 82 while having 132b. Have. The iron core 73 is arranged between the second left side protrusion 131b and the second right side protrusion 132b as an example between the plurality of first surface side protrusions, and the iron core 74 is an example between the plurality of second surface side protrusions. It is arranged between the third left projection 131c and the third right projection 132c. As a result, the outer support member 120 can suppress the movement of the iron core 73 and the iron core 74 in the rotational direction.

Further, the magnetic pole element 60 has a plurality of magnetic pole units 70 having an iron core 73, an iron core 74, a Z outer magnet 82, and the like, and is arranged between adjacent magnetic pole units 70 so as to maintain a distance between the plurality of magnetic pole units 70. The intermediate support member 151 is provided. This makes it difficult for the magnetic pole unit 70 or the components constituting the magnetic pole unit 70 to move in the rotational direction. In addition, the strength against impact from the rotation direction can be increased.

Further, in the magnetic pole unit 70, the iron core 71 as an example of the third iron core arranged in the direction orthogonal to the iron core 74 with respect to the iron core 73, the S pole faces the iron core 73, and the N pole is the iron core 71. It has an R first magnet 83 as an example of a second permanent magnet arranged so as to face. Then, the intermediate support member 151 is arranged between the R first magnets 83 of the adjacent magnetic pole units 70. This makes it difficult for the R first magnet 83 to move in the rotational direction. Therefore, the strength against an impact from the rotation direction can be increased, and damage to the R first magnet 83 can be suppressed. Further, the intermediate support member 151 is arranged between the R second magnets 84 of the adjacent magnetic pole units 70. This makes it difficult for the R second magnet 84 to move in the rotational direction. Therefore, the strength against an impact from the rotation direction can be increased, and damage to the R second magnet 84 can be suppressed.

In addition, the convex portions 871 protruding from both end faces of the θ1 first outer magnet 87 in the rotational direction enter the gap between the iron core 73 and the convex portions 831 of the R first magnet 83. This makes it difficult for the R first magnet 83 to move in the rotational direction. Since the relationship between the θ second outer magnet 88 and the R second magnet 84 is the same, the R second magnet 84 is also difficult to move in the rotational direction. Therefore, the strength against an impact from the rotation direction can be increased, and damage to the R first magnet 83 and the R second magnet 84 can be suppressed.

Further, the intermediate support member 151 is arranged in the gap between the θ first inner magnet 85 and the θ second inner magnet 86 and the θ first outer magnet 87 and the θ second outer magnet 88. As a result, the θ first inner magnet 85, the θ second inner magnet 86, the θ first outer magnet 87, and the θ second outer magnet 88 become difficult to move in the radial direction. Therefore, it is possible to increase the strength against impact from the radial direction, and it is possible to suppress damage to the θ1 inner magnet 85, the θ2nd inner magnet 86, the θ1st outer magnet 87, and the θ2nd outer magnet 88. can.

Further, in the magnetic monopole 60, the first inner core restraining member 154 is fitted in the recess 711 formed in the iron core 71, and the first outer core restraining member 156 is fitted in the recess 731 formed in the iron core 73. With such a configuration, the surface of the magnetic monopole 60 facing the armature 10 arranged on one side can be flattened. As a result, the gap (air gap) generated between the armature 10 and the iron core 71 or the iron core 73 of the magnetic pole element 60 can be reduced. However, if the increase in the voids is acceptable, the recesses 711 and 731 may not be formed in the iron cores 71 and 73.
The same applies to the configuration of the magnetic monopole 60 on the other side in the axial direction.

(Modification example of support structure)
In FIGS. 12 and 13, among the 10 magnetic pole units 70 of the magnetic pole elements 60, each subunit 60a includes four magnetic pole units 70, and when the subunits 60a are combined, the two magnetic pole units 70 are placed between them. An example of sandwiching the monopole is shown, but the present invention is not particularly limited to this mode.

FIG. 17 is a diagram showing an example of a modification of the subunit 160a.
For example, an example of a configuration in which a monopole (not shown) has 16 magnetic monopoles and the monopoles are four in the rotation direction and are divided into subunits 160a at 90 degrees is shown. Each subunit 160a has an inner support member and an outer support member divided into four, 90 degrees in the rotational direction, and four magnetic pole units. In such an embodiment, the annular magnetic monopole is completed by combining the four subunits 160a. When combining the subunits 160a, it is not necessary to sandwich the magnetic pole unit 70 between them. As a result, all the subunits 160a can have the same shape, and the productivity is improved.

In terms of making all subunits have the same shape, it may be divided by a divisor of the total number of magnetic pole units possessed by the magnetic poles. For example, when the number of magnetic pole units 70 is 16, it is possible to make all subunits have the same shape by dividing them into two, four, and eight. Further, even if the subunits are divided by the total number of magnetic pole units 70, all subunits can have the same shape. For example, when the number of magnetic pole units is 16, it is possible to make all the subunits have the same shape by dividing them into 16.

The magnetic pole element 60 having 10 magnetic pole units 70 according to the second embodiment is also divided into two, five, and ten, and each subunit is the total number of magnetic pole units 70 / the number of divided magnetic pole units 70. It is possible to make all subunits have the same shape by having.
However, the number of divisions is not particularly limited as long as the subunits are not particular about having the same shape. For example, the subunit having four magnetic pole units 70 may be divided into two subunits and one subunit having two magnetic pole units 70.

The shape of the portion where the divided inner support members 110 and the divided outer support members 120 are combined is not particularly limited. Hereinafter, the divided member of the inner support member 110 and the divided member of the outer support member 120 are collectively referred to as a “divided member”, and a modified example of the combined portion will be described.
For example, as shown in FIG. 17, a plurality of convex portions 201 protruding from the end face in the rotational direction are provided at one end of the split member 200 in the rotational direction, and the other end of the split member 200 in the rotational direction is provided. , A plurality of recesses 202 recessed in the rotational direction from the end face are provided. As shown in FIG. 17, the plurality of convex portions 201 are provided so as to be arranged in the axial direction, and are provided on either of the portions divided into two in the thickness direction (radial direction) of the dividing member 200. It is provided alternately so that it is provided. Further, as shown in FIG. 17, the plurality of recesses 202 are formed so as to be aligned in the axial direction, and one of the portions divided into two in the thickness direction (radial direction) of the dividing member 200. It is formed alternately so that it is formed in.
Then, one dividing member 200 and the other dividing member 200 may be combined by fitting the convex portion 201 of one dividing member 200 into the concave portion 202 of the other dividing member 200. According to such an embodiment, it is possible to prevent one split member 200 and the other split member 200 from being displaced in the axial direction and the radial direction.

FIG. 18 is a diagram showing a modified example of a combination portion of one divided member 210 and another divided member 210.
As shown in FIG. 18A, a convex portion 211 protruding in the rotational direction from the end face to a triangular columnar whose radial direction is the columnar direction is provided at one end of the split member 210 in the rotational direction, and is provided in the rotational direction. The other end may be provided with a recess 212 recessed in the rotational direction from the end face into a triangular columnar whose radial direction is the column direction. Then, the one dividing member 210 and the other dividing member 210 are relatively moved in the radial direction, and the convex portion 211 of the one dividing member 210 is fitted into the concave portion 212 of the other dividing member 210. One dividing member 210 and another dividing member 210 may be combined. According to such an embodiment, it is possible to prevent one split member 210 and the other split member 210 from being displaced in the axial direction and the rotational direction. The number of the convex portions 211 and the concave portions 212 is not particularly limited, and may be one or a plurality as shown in FIG. 18 (a).

Further, as shown in FIG. 18B, a convex portion 221 protruding in the rotational direction from the end face to a triangular columnar whose rotational direction is the columnar direction is provided at one end of the split member 220 in the rotational direction, and the member rotates. At the other end of the direction, a recess 222 recessed in the rotation direction may be provided in a triangular columnar shape in which the rotation direction is the column direction from the end face. Then, the one split member 220 and the other split member 220 are relatively moved in the rotational direction, and the convex portion 221 of the one split member 220 is fitted into the concave portion 222 of the other split member 220. One split member 220 and another split member 220 may be combined. According to such an embodiment, it is possible to prevent one dividing member 220 and the other dividing member 220 from being displaced in the axial direction and the radial direction. The number of the convex portions 221 and the concave portions 222 is not particularly limited, and may be one or a plurality as shown in FIG. 18 (b). Further, the shapes of the convex portion 221 and the concave portion 222 are not limited to the triangular columnar shape, and may be a rectangular parallelepiped shape, a cube shape, or a conical shape shown in FIG. 18 (c).

Further, as shown in FIG. 18D, a convex portion 231 protruding in the rotational direction from the end face to a triangular columnar whose axial direction is the columnar direction is provided at one end of the split member 230 in the rotational direction, and is rotated. At the other end in the direction, a recess 232 recessed in the rotational direction may be provided in a triangular columnar shape whose axial direction is the column direction from the end face. Then, the one split member 230 and the other split member 230 are relatively moved in the axial direction, and the convex portion 231 of the one split member 230 is fitted into the concave portion 232 of the other split member 230. One split member 230 and another split member 230 may be combined. According to such an embodiment, it is possible to prevent one split member 230 and the other split member 230 from being displaced in the rotational direction and the radial direction. As shown in FIG. 18D, when the one dividing member 230 and the other dividing member 230 are relatively moved in the axial direction and fitted, the one dividing member 230 and the other dividing member 230 are fitted. A surface 233 may be provided on which the and the surface abuts.

In the above-mentioned example, the first Rθ magnet holding member 152, the second Rθ magnet holding member 153, the first inner core holding member 154, the second inner core holding member 155, the first outer core holding member 156, and the second outer core holding member 156. The member 157 is fixed when the inner support member 110 and the outer support member 120 are in a divided state, but the present invention is not particularly limited. The first Rθ magnet holding member 152, the second Rθ magnet holding member 153, the first inner core holding member 154, the second inner core holding member 155, the first outer core holding member 156, and the second outer core holding member 157 were divided. The inner support member 110 and the outer support member 120 in the state may be combined to form an annular shape and then fixed. In such a case, the first Rθ magnet holding member 152, the second Rθ magnet holding member 153, the first inner core holding member 154, the second inner core holding member 155, the first outer core holding member 156 and the second outer core holding member 157. Can be made into an annular shape.

(Method of fixing the magnetic pole unit 70 and the support member 100 in the radial direction)
The magnetic pole unit 70 and the support member 100 may be fixed in the radial direction by using the method described with reference to FIG.
For example, as shown in FIG. 8A, a through hole (not shown) is formed in a portion of the outer support member 120 facing each iron core 73, and a female screw (not shown) is formed in the iron core 73. Then, the magnetic pole unit 70 and the support member 100 may be fixed by tightening the male screw of the bolt 57 passed through the through hole formed in the outer support member 120 to the female screw formed in the iron core 73.
Further, in the outer support member 120, a through hole (not shown) is formed in a portion facing each iron core 74, and a female screw (not shown) is formed in the iron core 74, and a through hole is formed in the outer support member 120. The male screw of the bolt 57 passed through may be tightened to the female screw formed on the iron core 74.

Instead of or in addition to the above-mentioned method, as shown in FIG. 8 (b), a through hole (not shown) is formed in a portion of the inner support member 110 facing each iron core 71. At the same time, a female screw (not shown) is formed on the iron core 71. Then, by tightening the male screw of the bolt 58 (see FIG. 8 (b)) passed through the through hole formed in the inner support member 110 to the female screw formed in the iron core 71, the magnetic pole unit 70 and the support member 100 are attached. It may be fixed.
Further, a through hole (not shown) is formed in a portion of the inner support member 110 facing each iron core 72, and a female screw (not shown) is formed in the iron core 72 to form a through hole in the inner support member 110. The male screw of the bolt 58 passed through may be tightened to the female screw formed on the iron core 72.

Instead of or in addition to the above-mentioned method, a through hole (not shown) is formed in a portion of the outer support member 120 facing each θ first outer magnet 87, and the θ first outer is formed. A female screw (not shown) is formed on the magnet 87. Then, the male screw of the bolt 57 (see FIG. 8C) passed through the through hole formed in the outer support member 120 is tightened to the female screw formed in the θ first outer magnet 87 to support the magnetic pole unit 70. The member 100 may be fixed.
Further, in the outer support member 120, a through hole (not shown) is formed in a portion facing each θ second outer magnet 88, and a female screw (not shown) is formed in the θ second outer magnet 88 to support the outer side. The male screw of the bolt 57 passed through the through hole formed in the member 120 may be tightened to the female screw formed in the θ second outer magnet 88.

Further, instead of tightening with bolts 57 and 58, as shown in FIG. 8D, the magnetic pole unit 70 and the support member 100 may be fixed by fitting a pin 59.
Further, instead of fixing with bolts 57 and 58 or pins 59, for example, the magnetic pole unit 70 and the support member 100 may be fixed by welding or adhesion.

The inner support member 110 and the outer support member 120 may be split in the axial direction instead of being split in the rotational direction.
For example, the inner support member 110 and the outer support member 120 may be configured by combining cylindrical members divided into two in the axial direction.
FIG. 19 is a diagram showing a combination portion of the first division member 241 and the second division member 242 constituting the outer support member 120.
As shown in FIG. 19, a plurality of convex portions 241a projecting from the end face to the other side in the axial direction are provided at the other end portion in the axial direction of the first division member 241 and in the axial direction of the second division member 242. A plurality of recesses 242a recessed in the axial direction from the end face are provided at one end. As shown in FIG. 19, the plurality of convex portions 241a are provided so as to be arranged in the rotation direction, and either of the portions is divided into two in the thickness direction (radial direction) of the first dividing member 240. It is provided alternately so that it is provided on one side. Further, as shown in FIG. 19, the plurality of recesses 242a are formed so as to be arranged in the rotation direction, and which of the portions of the second dividing member 242 is divided into two in the thickness direction (radial direction). It is formed alternately so that it is formed on one side.

Then, the first division member 241 and the second division member 242 may be combined by fitting the convex portion 241a of the first division member 241 into the concave portion 242a of the second division member 242. According to such an embodiment, it is possible to prevent the first division member 241 and the second division member 242 from being displaced in the rotational direction and the radial direction. Further, by configuring the inner support member 110 and the outer support member 120 so that they can be divided in the axial direction, parts such as the iron core 71 constituting the magnetic pole unit 70 are assembled by inserting them into the support member 100 in the axial direction. be able to.

The inner support member 110 and the outer support member 120 are not limited to two in the axial direction.
For example, the inner support member 110 and the outer support member 120 may be divided by the same number as the number of components stacked in the axial direction, such as the iron core 71 constituting the magnetic pole unit 70. In the motor 2 according to the second embodiment, the number of laminated parts constituting the magnetic pole unit 70 is, for example, three, the iron core 73, the Z outer magnet 82, and the iron core 74, so that the portion where the iron core 73 is arranged. , It can be exemplified that the Z outer magnet 82 is divided into three parts, a portion where the Z outer magnet 82 is arranged and a portion where the iron core 74 is arranged.
In the axial direction, when the iron core and the permanent magnet are laminated, it may be further divided into a portion where the laminated iron core is arranged and a portion where the permanent magnet is arranged. That is, when seven parts such as an iron core, a permanent magnet, an iron core, a permanent magnet, an iron core, a permanent magnet, and an iron core are laminated in the axial direction, they may be divided into seven parts. That is, when the number of pairs of the iron core and the permanent magnet is n, the number may be divided into 2n + 1.

As a method of fixing the magnetic pole unit 70 and the support member 100, a method of shrink fitting may be adopted.
FIG. 20 is a diagram showing an example of a magnetic monopole 60 fixed by shrink fitting.
More specifically, after assembling the magnetic pole 60 as described above, a cylindrical ring 170 having an inner peripheral surface having a diameter smaller than the diameter of the outer peripheral surface of the outer support member 120 is used. The magnetic monopole 60 may be arranged inside the ring 170 in a state where the ring 170 is heated so that the diameter of the inner peripheral surface is larger than the diameter of the outer peripheral surface of the outer support member 120. By shrink fitting, the magnetic pole unit 70 and the support member 100 can be firmly fixed. It should be noted that the material of the ring 170 can be exemplified as a metal such as aluminum, iron, stainless steel, or a thermosetting resin. From the viewpoint of weight reduction, aluminum is most preferable.

When the ring 170 is used for shrink fitting, the ring 170 is in a state where the end faces in the rotational direction are in contact with each other without combining the inner support members 110 in the split state and the outer support members 120 in the split state. The magnetic monopole 60 may be arranged inside. That is, it is not necessary to provide the convex portions 2011, 211, 221, 231 and the concave portions 202, 212, 222, 232 described with reference to FIGS. 17 and 18.

(Modification example of a pair of protrusions 130)
FIG. 21 is a diagram showing an example of a pair of protrusions of the support member 100 and a modified example of the iron core.
The shape of the protrusions constituting the pair of protrusions 130 is not limited to the rectangular parallelepiped shape. For example, the tip of a protrusion constituting one of the left protrusion group 131 and the right protrusion group 132 (for example, the left protrusion group 131) rotates toward the other protrusion group (for example, the right protrusion group 132). It may be bent. More specifically, as shown in FIG. 21, the second left projection 131b and the third left projection 131c of the left projection group 131 have a bent portion 131f bent in the rotational direction toward the right projection group 132 at the tip. Good to have. Further, it is preferable that the second right projection 132b and the third right projection 132c of the right projection group 132 have a bent portion 132f bent in the rotational direction toward the left projection group 131 at the tip end.

Then, a recess for accommodating the bent portions 131f and 132f is formed in the iron core arranged at the position corresponding to the protrusion having the bent portions 131f and 132f. For example, when the third left projection 131c of the left projection group 131 has a bent portion 131f and the third right projection 132c of the right projection group 132 has a bending portion 132f, as shown in FIG. 21, the iron core It is preferable to form a recess 76 for accommodating the bent portions 131f and 132f, respectively, inside one side of the 74. When the second left side protrusion 131b has a bent portion 131f and the second right side protrusion 132b has a bent portion 132f, the bent portions 131f and 132f are housed inside the other side of the iron core 73, respectively. It is preferable to form a recess (not shown). The bending portions 131f, 132f, the recesses 76, and the like suppress the axial movement of the iron cores 73 and 74.

FIG. 22 is a diagram showing an example of deformation of a pair of protrusions, an iron core, and a permanent magnet of the support member 100. 22 (a) is a diagram showing an example of modification of a pair of protrusions, FIG. 22 (b) is a diagram showing an example of modification of an iron core and a permanent magnet, and FIG. 22 (c) is a diagram showing an example of modification. , Is a diagram showing an example of a state in which an iron core and a permanent magnet are fitted in a pair of protrusions.
The number of protrusions of the left side protrusion group 131 and the right side protrusion group 132 of the pair of protrusions 130 is not limited to four.
The left-side projection group 131 according to the modification shown in FIG. 22A is a first one-side projection 131g provided at one end and a first other-side projection 131h provided at the other end. It has two protrusions. Further, the right-side protrusion group 132 according to the modified example has two protrusions, a second one-side protrusion 132g provided at one end and a second other-side protrusion 132h provided at the other end. It may be configured. The first one-side projection 131g and the first other-side projection 131h have a bent portion 131j at the tip thereof, which is bent in the rotational direction toward the right-side projection group 132. Further, the second one-side protrusion 132g and the second other-side protrusion 132h have a bent portion 132j bent in the rotational direction toward the left side protrusion group 131 at the tip end.

In the modified example shown in FIG. 22B, the iron core 273 corresponding to the iron core 73, the Z outer magnet 282 corresponding to the Z outer magnet 82, and the iron core 274 corresponding to the iron core 74 all have the same shape when viewed from the axial direction. Is. The iron core 273, the Z outer magnet 282, and the iron core 274 each have convex portions 273a, 282a, 274a protruding inward from the end face at the central portion in the rotation direction on the inner end face. In the iron core 273, the Z outer magnet 282, and the iron core 274, the convex portions 273a, 282a, 274a are located in the gap between the bent portion 131j and the bent portion 132j in the rotational direction, and the other fan-shaped portion is the first one. The shape is located at a portion surrounded by the side protrusion 131 g and the second one side protrusion 132 g.

Due to the configuration of the pair of protrusions described above and the iron core 273, the Z outer magnet 282 and the iron core 274, the iron core 273, the Z outer magnet 282 and the iron core 274 are axially arranged with the first one-side projection 131 g and the second one side. It can be inserted between the protrusion and 132 g. Further, with such a configuration, the iron core 273 and the iron core 274 are suppressed from moving in the rotational direction and the radial direction.
The first outer core holding member 156 and the second outer core holding member 157 suppress the movement of the iron core 273, the Z outer magnet 282, and the iron core 274 in the axial direction.

Similarly, the configuration of the pair of protrusions of the inner support member 110, the iron core corresponding to the iron core 71, the permanent magnet corresponding to the Z inner magnet 81, and the iron core corresponding to the iron core 72 is described as the pair of the outer support members 120 described above. The configuration of the protrusion group of the above and the iron core 273, the Z outer magnet 282, and the iron core 274 may be the same.
The first inner core holding member 154 and the second inner core holding member 155 suppress the movement of these iron cores, permanent magnets, and iron cores in the axial direction.

FIG. 23 is a diagram showing other modifications of the iron core and the permanent magnet. FIG. 23A is a diagram showing an example of deformation of the iron core and the permanent magnet, and FIG. 23B is a diagram showing an example of a state in which the iron core and the permanent magnet are fitted into a pair of protrusions. ..
In another modified example shown in FIG. 23, a recess 373a into which the first one-side projection 131g is fitted and a recess into which the second one-side projection 132g is fitted into one end surface of the iron core 373 corresponding to the iron core 73. 373b is formed. Further, a recess 374a into which the first other side projection 131h is fitted and a recess 374b into which the second other side protrusion 132h is fitted are formed on the other end surface of the iron core 374 corresponding to the iron core 74.

The Z outer magnet 382 and the iron core 374 corresponding to the iron core 373 and the Z outer magnet 82 have a first one-side protrusion 131 g and a second one-side protrusion 132 g, and a first other side protrusion 131h and a second other-side protrusion in the axial direction. It is arranged between 132h.
With such a configuration, the iron core 373, the Z outer magnet 382, and the iron core 374 are suppressed from moving in the axial direction without providing the first outer core holding member 156 and the second outer core holding member 157.

Similarly, the configuration of the pair of protrusions of the inner support member 110, the iron core corresponding to the iron core 71, the permanent magnet corresponding to the Z inner magnet 81, and the iron core corresponding to the iron core 72 is described as the pair of the outer support members 120 described above. The configuration of the protrusion group of the above and the iron core 373, the Z outer magnet 382, and the iron core 374 may be the same.
With such a configuration, it is possible to prevent the core, the permanent magnet, and the iron core from moving in the axial direction without providing the first inner core holding member 154 and the second inner core holding member 155.

(Modification example of intermediate support member 151, R second magnet 84)
FIG. 24 is a diagram showing a modified example of the intermediate support member and the R second magnet. FIG. 24 (a) is a diagram showing an example of deformation of the intermediate support member and the R second magnet, and FIG. 24 (b) is an example of a state in which the intermediate support member and the R second magnet are fitted together. It is a figure which shows.
In the modified example shown in FIG. 24, the intermediate support member 251 corresponding to the intermediate support member 151 has protrusions 251a protruding in the rotational direction from both end faces in the rotational direction. Further, the R second magnet 284 corresponding to the R second magnet 84 does not have convex portions 831 protruding from both end faces in the rotation direction, and instead is recessed from one end face to both ends in the rotation direction. It has a concave portion 284a.

Then, when assembling, after arranging the adjacent R second magnets 284, between the adjacent R second magnets 284 until the protruding portion 251a of the intermediate support member 251 fits into the concave portion 284a of the adjacent R second magnets 284. The intermediate support member 251 is inserted into the.
As a result, the R second magnet 284 is suppressed from moving in the axial direction.

(Modification example of the first Rθ magnet holding member 152 and the second Rθ magnet holding member 153)
The first Rθ magnet holding member 152 has an annular shape so as to cover one surface of all the R first magnets 83, but is not particularly limited to such an embodiment. Further, the first Rθ magnet holding member 152 has an annular shape so as to cover one surface of the θ1 inner magnet 85 and the θ1 outer magnet 87, but is not particularly limited to such an embodiment. For example, to cover a part of the end face of the R first magnet 83 on both sides of the intermediate support member 151, the end face of the outer portion of the θ first inner magnet 85, and the end face of the inner portion of the θ first outer magnet 87. It may be cross-shaped. In the case of such a configuration, the R first magnet 83 in the region between the cross-shaped pressing members and the θ1 first magnet in the region between the cross-shaped pressing member and the first inner core holding member 154. The end surface of the inner magnet 85 and one end surface of the θ first outer magnet 87 in the region between the cross-shaped pressing member and the first outer core holding member 156 is expanded to the position of the first inner core holding member 154. It is possible to make it.
Similarly, by forming the second Rθ magnet holding member 153 into a cross shape, the other end face of the R second magnet 84, the θ2 inner magnet 86, and the θ2 second outer magnet 88 can be held down by the second inner core. It is possible to expand to the position of the member 155.

In the electric motor according to the first embodiment and the electric motor according to the second embodiment, the surface of the iron core (for example, the iron core 71) that does not face the armature 10 and the permanent magnet (for example, the magnet 81 in Z) do not face each other. A support member (for example, support member 100, support member 50) formed of a non-magnetic material that covers at least one surface and supports the iron core and the permanent magnet is applied to an axial gap type motor. ing. However, the application of this support member is not limited to the axial gap type motor, and may be applied to, for example, a radial gap type motor that converts electrical energy into rotary motion.

1, 2, ... Electric motor, 5 ... Rotating shaft, 10 ... Armor, 20 ... Magnetic pole element, 30, 70 ... Magnetic pole unit, 50, 100 ... Support member, 51, 110 ... Inner support member, 52, 120 ... Outer support member , 53 ... Other side support member, 71,72,73,74,311,321,401,411,421 ... Iron core, 75,315,405,415 ... Rotor magnetic pole, 81 ... Z inner magnet, 82 ... Z outside Magnet, 83 ... R 1st magnet, 84 ... R 2nd magnet, 85 ... θ 1st inner magnet, 86 ... θ 2nd inner magnet, 87 ... θ 1st outer magnet, 88 ... θ 2nd outer magnet, 130, 150 ... A pair of protrusions, 151 ... Intermediate support member, 312,322,402,421,422 ... Permanent magnet

Claims (13)

The first iron core and
The second iron core and
A permanent magnet arranged so that the first pole faces the first core and the second pole faces the second core.
It covers at least one surface of the first core and the second core that does not face the armature and the surface that does not face the permanent magnet, and supports the first core, the second core, and the permanent magnet. , Support members molded from non-magnetic materials, and
A magnetic monopole with. The magnetic pole according to claim 1, wherein the support member has a plurality of protrusions that prevent the permanent magnet from moving toward the first core or the second core. The plurality of protrusions have a plurality of first surface side protrusions which are protrusions arranged on the first surface side of the permanent magnet, and a second surface which is a surface opposite to the first surface of the permanent magnet. It has a plurality of second surface side protrusions that are protrusions arranged on the side,
The first iron core is arranged between a plurality of the first surface side protrusions.
The magnetic monopole according to claim 2, wherein the second iron core is arranged between a plurality of the second surface side protrusions. One of the second surface side projections in the plurality of the second surface side projections has a one-sided bending portion bent toward the other second surface side projection, and the other second surface side projection has a bent portion. Has a bent portion on the other side that is bent toward the protrusion on the second surface side of the one.
The magnetic pole according to claim 3, wherein the second iron core is formed with a recess for accommodating the one-sided bent portion and the other-side bent portion. The support member has a plurality of protrusions arranged in the rotational direction and protruding in the radial direction, and one protrusion in the plurality of protrusions has a bent portion bent toward the other protrusion and the other. The protrusion has a bend that bends toward one of the protrusions.
The first iron core is arranged at a portion surrounded by the one protrusion and the other protrusion, and is a protrusion arranged between the bent portion of the one protrusion and the bent portion of the other protrusion. The magnetic pole according to claim 1, which has a portion. The magnetic pole according to claim 5, wherein the second core and the permanent magnet all have the same shape as seen in the axial direction of the rotating shaft. The support member has a plurality of protrusions arranged in the rotation direction and protruding in the radial direction, and one protrusion in the plurality of protrusions has a bent portion bent toward the other protrusion in the plurality of protrusions. However, the other protrusion has a bent portion bent toward the one protrusion.
The magnetic pole according to claim 1, wherein the first iron core is formed with a recess into which the plurality of protrusions are fitted. The support member has a plurality of other protrusions facing the plurality of protrusions, which are arranged in the rotation direction and project in the radial direction, and one protrusion in the other plurality of protrusions is the other plurality of protrusions. The protrusion has a bend that bends toward the other protrusion, and the other protrusion has a bend that bends toward that one protrusion.
The second iron core is formed with a recess into which the other plurality of protrusions are fitted.
The magnetic pole according to claim 7, wherein the first core, the permanent magnet, and the second core are arranged between the plurality of protrusions and the other plurality of protrusions. It has a plurality of units having the first core, the second core, and the permanent magnet.
The magnetic pole according to any one of claims 1 to 8, further comprising an intermediate support member arranged between the plurality of units so as to maintain a distance between the plurality of the units. The unit has a third core arranged in a direction orthogonal to the second core with respect to the first core, a first pole facing the first core, and a second pole facing the third core. With a second permanent magnet, arranged to face towards,
The magnetic pole according to claim 9, wherein the intermediate support member is arranged between the second permanent magnets of adjacent units. With an armature
A magnetic monopole having a rotation axis and arranged to face the armature,
It is an axial gap type motor equipped with
The magnetic poles include a first core, a second core arranged on the opposite side of the first core from the armature, a first pole facing the first core, and a second pole. The permanent magnets arranged so as to face the second core and the surface extending in the axial direction of the rotation axis in the first core and the second core, or the opposite to the armature in the second core. A support member molded from a non-magnetic material that covers the side surface and supports the first core, the second core, and the permanent magnet.
Equipped with a motor. With respect to the outer support member in the divided state, the plurality of first cores, the plurality of second cores, the first pole faces the first core, and the second pole faces the second core. Insert the first permanent magnet between the first core and the second core so that it faces.
A second permanent magnet is fitted between adjacent first cores among the plurality of first cores.
A third permanent magnet is fitted between adjacent second cores among the plurality of second cores.
With respect to the inner support member in the divided state, a plurality of third cores, a plurality of fourth cores, the first pole faces the third core, and the second pole faces the fourth core. Insert the 4th permanent magnet between the 3rd core and the 4th core so that it faces.
A fifth permanent magnet is fitted between adjacent third cores among the plurality of third cores.
A sixth permanent magnet is fitted between adjacent fourth cores among the plurality of fourth cores.
A seventh permanent magnet is placed between the first core and the third core, and an eighth permanent magnet is placed between the second core and the fourth core.
A method for assembling a magnetic monopole that constitutes a subunit by combining the outer support member in the divided state and the inner support member in the divided state. The method for assembling a magnetic pole according to claim 12, wherein the inner support members in the divided state are joined to each other in the plurality of subunits, and the outer support members in the divided state are joined to each other.

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