Magnetic pole rotor and magnetic gear electromachine

Abstract

To provide a magnetic pole piece rotor and a magnetic gear electric machine that can suppress the reduction of torque transmission efficiency.SOLUTION: The magnetic pole piece rotor is provided in a magnetic gear electric machine. The magnetic pole piece rotor includes: an annular unit including a plurality of pole pieces and a plurality of non-magnetic bodies arranged alternately in a circumferential direction of the magnetic gear electric machine; an end ring connected to an end part of the annular unit on one side of the magnetic gear electric machine in an axial direction; and a flange including a connection ring part connected to the end ring from one side. The end ring includes an end ring fitting part that is convex on one side or concave on the other side in the axial direction. The connection ring part includes a connection ring fitting part that fits into the end ring fitting part.SELECTED DRAWING: Figure 4A

Description

Technical Field

[0001] The present disclosure relates to a pole-piece rotor and a magnetic gear electric machine.

Background Art

[0002] The magnetic gear electric machine exemplified in Patent Document 1 includes a stator, a pole-piece rotor (outer rotor), and a magnet rotor (inner rotor) in order from the outer side in the radial direction. The pole-piece rotor includes a pole piece extending in the axial direction and a flange connected to one end of the pole piece. With the operation of the magnetic gear electric machine, torque transmission is performed between the flange and the pole piece. In this document, one end surface of the pole piece faces the axial direction of the magnetic gear electric machine, and the flange is in surface contact with this one end surface.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above magnetic gear electric machine, since the flange is in surface contact with one end surface of the pole piece, when torque is transmitted between the pole piece and the flange, there is a possibility that the pole piece and the flange slide relative to each other in the circumferential direction. Therefore, the torque transmission efficiency may decrease.

[0005] An object of the present disclosure is to provide a pole-piece rotor and a magnetic gear electric machine capable of suppressing a decrease in torque transmission efficiency.

Means for Solving the Problems

[0006] The pole-piece rotor according to at least one embodiment of the present disclosure is a pole-piece rotor provided in a magnetic gear electric machine, The annular unit comprising a plurality of magnetic pole pieces and a plurality of non-magnetic materials arranged alternately in the circumferential direction of the magnetic gear electromachine, An end ring connected to the end of the annular unit on one axial side of the magnetic gear electromachine, A flange including a connecting ring portion that connects to the end ring from one side, Equipped with, The end ring includes an end ring mating portion which is convex on one side or concave on the other side in the axial direction. The connecting ring portion includes a connecting ring fitting portion that fits into the end ring fitting portion.

[0007] A magnetic gear electromachine according to at least one embodiment of the present disclosure is A magnetic pole rotor according to any one of claims 1 to 18, The stator includes the annular unit and stator coils arranged radially, A magnetic rotor including a rotor magnet, which is positioned on the opposite side of the stator coil from the annular unit, It is equipped with. [Effects of the Invention]

[0008] According to this disclosure, it is possible to provide a magnetic pole rotor that can suppress a decrease in torque transmission efficiency, and a magnetic gear electromachine. [Brief explanation of the drawing]

[0009] [Figure 1A] A schematic diagram of a magnetic gear electromachine (magnetic geared generator) according to one embodiment. [Figure 1B] A schematic diagram of a magnetic gear electromachine (magnetic geared motor) according to another embodiment. [Figure 2] A schematic diagram showing the general internal structure of a magnetic gear electromachine. [Figure 3] A schematic perspective view of a pole rotor according to one embodiment. [Figure 4A] A schematic diagram showing the interlocking structure of the end ring and connecting ring portion according to one embodiment. [Figure 4B]A schematic diagram showing the interlocking structure of the end ring and connecting ring portion according to another embodiment. [Figure 5] A schematic diagram showing another fitting structure of the end ring and connecting ring portion according to another embodiment. [Figure 6] A schematic diagram showing an additional example of the interlocking structure of the end ring and connecting ring portion according to one embodiment. [Figure 7] A conceptual perspective view showing a flange according to one embodiment. [Figure 8A] A schematic diagram showing a different end ring and flange according to one embodiment. [Figure 8B] A schematic diagram showing a different end ring and flange according to another embodiment. [Modes for carrying out the invention]

[0010] Hereinafter, several embodiments of this disclosure will be described with reference to the attached drawings. However, the dimensions, materials, shapes, relative arrangements, etc., of the components described or shown in the drawings as embodiments are not intended to limit the scope of this disclosure, but are merely illustrative examples. For example, expressions describing relative or absolute arrangements such as "in a certain direction," "along a certain direction," "parallel," "orthogonal," "center," "concentric," or "coaxial" should not only strictly describe such arrangements, but also describe states of relative displacement with tolerances or angles or distances that allow for the same function to be achieved. For example, expressions such as "identical," "equal," and "homogeneous" that describe things being in an equal state not only describe a state of being strictly equal, but also describe a state in which there is a tolerance or a difference that is sufficient to achieve the same function. For example, expressions describing shapes such as squares or cylinders shall not only represent geometrically precise shapes such as squares or cylinders, but also shapes that include protrusions, chamfers, etc., to the extent that the same effect can be achieved. On the other hand, expressions such as "possessing," "including," or "having" one component are not exclusive expressions that exclude the existence of other components. Note that the same components may be denoted by the same reference numerals and the description thereof may be omitted.

[0011] <1. Overview of the Magnetic Gear Electric Machine 1> FIGS. 1A and 1B are schematic views of magnetic gear electric machines 1A and 1B (1) according to some embodiments of the present disclosure. In the following description, the "axial direction" is a direction parallel to the axis of the magnetic gear electric machine 1, the "radial direction" is a radial direction with respect to the axis of the magnetic gear electric machine 1, and the "circumferential direction" is a circumferential direction with respect to the axis of the magnetic gear electric machine 1. The magnetic gear electric machine 1 includes a rotating shaft A for transmitting power to an external rotating device described later, and the axis of the rotating shaft A coincides with the axis of the magnetic gear electric machine 1. The rotating shaft A is rotatably supported by a housing 98 installed on a base 101. The rotating shaft A in this example includes coaxial rotating shafts A1 and A2, but the present disclosure is not limited thereto, and the rotating shaft A may be a single shaft.

[0012] The magnetic gear electric machine 1 illustrated in FIGS. 1A and 1B includes a magnet rotor 10 and a stator 20. The magnet rotor 10 includes a plurality of rotor magnets 19 arranged in the circumferential direction and a rotor yoke 15 that supports the plurality of rotor magnets 19. The rotor yoke 15 is supported by the rotating shaft A2, and the magnet rotor 10 is configured to rotate integrally with the rotating shaft A2. In the figure, a surface magnet type (SPM; Surface Permanent Magnet) configuration in which a plurality of rotor magnets 19 are provided on the surface of the rotor yoke 15 is adopted, but the present disclosure is not limited thereto. For example, an embedded magnet type (IPM; Interior Permanent Magnet) configuration in which a plurality of rotor magnets 19 are arranged inside the rotor yoke 15 may be adopted (see FIG. 2). The stator 20 fixed to the housing 98 includes a plurality of stator magnets 29 arranged in the circumferential direction, a stator yoke 25 that supports the plurality of stator magnets 29, and a coil 99 as a stator coil wound around the stator yoke 25. In the stator 20 of the figure, an SPM type configuration is adopted, but the present disclosure is not limited thereto, and an IPM type configuration may be adopted.

[0013] The magnetic gear electromachine 1 shown in Figures 1A and 1B further comprises a pole piece rotor 30. The pole piece rotor 30 includes a plurality of pole pieces 55 arranged circumferentially between the stator 20 and the pole piece rotor 30, a flange 41 positioned on one axial side of the plurality of pole pieces 55, and another flange 44 positioned on the opposite side of the plurality of pole pieces 55 from the flange 41. The flange 41 is connected to the rotating shaft A1, and the other flange 44 is connected to the rotating shaft A2 via a bearing. The pole piece rotor 30 is configured to rotate integrally with the rotating shaft A1.

[0014] The magnetic gear electromachine 1A(1) illustrated in Figure 1A is a magnetic geared generator 2 configured to generate electricity by being driven by an input from a prime mover 9, which is an example of an external rotating device. The coil 99 of the magnetic geared generator 2 is electrically connected to a power supply destination 4, which may be a power system. The principle by which the magnetic geared generator 2 generates electricity is as follows: When the prime mover 9, which is connected to a rotating shaft A1 that functions as an input shaft, is driven, torque is input from the rotating shaft A1 to the flange 41, causing the magnetic pole piece rotor 30 to rotate. The relative positional relationship of the multiple magnetic pole pieces 55 with respect to the multiple rotor magnets 19 and multiple stator magnets 29 changes, modulating the magnetic flux between the magnetic rotor 10 and the stator 20, and the rotor magnets 19 receive a magnetic force from the modulated magnetic field, causing the magnetic rotor 10 to rotate (the rotating shaft A2, which acts as an output shaft, rotates together with the magnetic rotor 10). At this time, electromagnetic induction caused by the rotation of the magnetic pole rotor 30 and the magnetic rotor 10 generates a current in the coil 99, and the magnetic geared generator 2 can supply power to the power supply destination 4. When the magnetic geared generator 2 is operating, the prime mover 9 can rotate the rotating shaft A1 in any circumferential direction.

[0015] The magnetic gear electromachine 1B(1) illustrated in Figure 1B is a magnetic geared motor 3 configured to drive a rotating machine 8, which is an example of an external rotating device, by receiving power P from a power supply source 6, which may be a power grid, for example. The rotating machine 8 may be an electric vehicle that runs on the drive of the magnetic geared motor 3, for example. In this case, the rotating shaft A (rotating shaft A1) of the magnetic geared motor 3 may be connected to the drive shaft of the electric vehicle, which is a component of the rotating machine 8. The principle by which the magnetic geared motor 3 drives the rotating machine 8 is as follows: The rotating magnetic field generated by energizing the coil 99 causes the magnetic rotor 10 to rotate together with the rotating shaft A2. The relative positional relationship of the multiple magnetic pole pieces 55 with respect to the multiple rotor magnets 19 and multiple stator magnets 29 changes, modulating the magnetic flux between the magnetic rotor 10 and the stator 20, causing the magnetic pole piece rotor 30 to rotate, and torque is output from the flange 41 to the rotating shaft A1, which serves as the output shaft. As a result, torque is transmitted from the rotating shaft A1 to the rotating machine 8, which is driven by the magnetic geared motor 3. Note that when the magnetic geared motor 3 is operating, the rotating shaft A1 may rotate in any circumferential direction. The direction of rotation is determined by the energization control of the coil 99.

[0016] In the magnetic gear electric machines 1A and 1B(1) shown in Figures 1A and 1B, if NL is the number of magnetic poles of the magnetic pole pieces 55 of the magnetic pole piece rotor 30, NH is the number of pole pairs in the rotor magnets 19 of the magnet rotor 10, and NS is the number of pole pairs in the stator magnets 29 of the stator 20, then NL = NH + NS holds true. When this relationship holds, the ratio of the rotational speed of the magnet rotor 10 to that of the magnetic pole piece rotor 30 is expressed as NL / NH. In this example, NL / NH is greater than 1, so the magnet rotor 10 functions as a high-speed rotor and the magnetic pole piece rotor 30 functions as a low-speed rotor. Note that the number of magnetic poles NL of the magnetic pole pieces 55 is less than the number of pole pairs NS of the stator magnets 29.

[0017] In the examples shown in Figures 1A and 1B, the prime mover 9 and the rotating machine 8, as external rotating equipment, are connected to the rotating shaft A1. However, the disclosure is not limited thereto, and the external rotating equipment may also be connected to the rotating shaft A2. In this case, the rotating shaft A2 may be connected to another flange 44, and the rotating shaft A1 may be connected to the flange 41 via a bearing. This enables torque transmission between the magnetic pole rotor 30 and the rotating shaft A2 via the other flange 44. The rotating shaft A may also be a single shaft. In this case, the rotating shaft A is provided so as to penetrate the housing 98 axially, and the flange 41 and the other flange 44 are connected to the rotating shaft A, while the rotor yoke 15 of the magnetic rotor 10 is connected to the rotating shaft A via a bearing. In this embodiment, it is possible to use the external rotating equipment either connected to one end of the rotating shaft A in the axial direction or connected to the other end, improving the usability of the magnetic gear electromachine 1.

[0018] <2. Overview of the internal structure of the magnetic gear electromachine 1> Figure 2 is a schematic diagram showing the internal structure of a magnetic gear electromachine 1 according to one embodiment of the present disclosure. In Figure 2, which is a schematic diagram, the circumferential direction is shown to coincide with the left-right direction of the paper. The pole piece rotor 30 comprises an annular unit 50 including a plurality of pole pieces 55 and a plurality of non-magnetic materials 52 (see also Figure 3). Each pole piece 55 and each non-magnetic material 52 extends in the axial direction. The plurality of pole pieces 55 and the plurality of non-magnetic materials 52 are arranged alternately in the circumferential direction. Each pole piece 55 is formed from electromagnetic steel sheets stacked in the axial direction. The annular unit 50 faces the magnet rotor 10 with a first gap G1 and faces the stator 20 with a second gap G2. In the example of Figure 2, the annular unit 50 faces the rotor yoke 15 with a first gap G1 and faces the plurality of stator magnets 29 with a second gap G2.

[0019] In some embodiments of this disclosure, part or all of the outer circumferential surface of the annular unit 50 may be covered by a cover (not shown). Similarly, part or all of the inner circumferential surface of the annular unit 50 may also be covered by a cover (not shown). The material forming the cover is preferably a non-magnetic material, and more preferably a non-magnetic and non-conductive material.

[0020] <3. Overall configuration of the magnetic pole rotor 30> Figure 3 is a schematic perspective view of a pole piece rotor 30 according to one embodiment of the present disclosure. As described above, the pole piece rotor 30 comprises an annular unit 50. In the example shown in the figure, the non-magnetic material 52 is longer in the axial direction than the pole pieces 55. The pole piece rotor 30 further comprises an end ring 31 connected to one end of the annular unit 50 on one side in the axial direction. The end ring 31 is connected to one end of each pole piece 55 and one end of each non-magnetic material 52, and in the example shown in the figure, a receiving recess 331 is formed in the end ring 31 that accommodates one end of the non-magnetic material 52. The receiving recess 331 is recessed to one side from the other end face 335 in the axial direction of the end ring 31. The end face 335 of the end ring 31 illustrated in the figure is directly connected to one end of the pole piece 55, but instead, a spacer may be interposed between the end face 335 and the end of the pole piece 55.

[0021] The magnetic pole rotor 30 further comprises a flange 41. The flange 41 includes a connecting ring portion 42 that connects to the end ring 31 from one side, a plurality of support columns 47 that extend radially inward from the connecting ring portion 42, and an axial connecting portion 48 connected to the inner end of each of the plurality of support columns 47. The plurality of support columns 47 are arranged at equal intervals in the circumferential direction. The axial connecting portion 48 is cylindrical along the axial direction, and the inner circumferential surface of the axial connecting portion 48 is connected to the rotation axis A1. Note that the structure of the flange 41 shown in Figure 3 is merely one example of this disclosure. For example, the flange 41 does not need to have multiple support columns 47. In this case, the inner circumferential surface of the connecting ring portion 42 may be directly connected to the outer circumferential surface of the axial connecting portion 48. Such a configuration can be achieved by making the radial length of the connecting ring portion 42 longer than the radial length shown in Figure 3.

[0022] In this example, a configuration similar to that on one side is adopted on the other axial side of the pole rotor 30. Specifically, the pole rotor 30 includes a separate end ring 34 connected to the end of the annular unit 50 on the other axial side, and a separate flange 44 including a separate connecting ring portion 49 connected to the separate end ring 34 from the other side. In the example shown in the figure, the separate end ring 34 and the separate flange 44 have shapes that are axially symmetrical with respect to the end ring 31 and the flange 41, respectively. However, this disclosure is not limited thereto, and the separate end ring 34 and the separate flange 44 may be axially asymmetrical with respect to the end ring 31 and the flange 41, respectively (details will be described later).

[0023] <4. Example of the interlocking structure of the end ring 31 and the connecting ring portion 42> Figures 4A and 4B are schematic diagrams showing the interlocking structure of the end ring 31 and the connecting ring portion 42 according to one embodiment of the present disclosure, and are illustrated so that the circumferential direction coincides with the left-right direction of the paper (the same applies to Figures 5, 8A, and 8B).

[0024] In Figures 4A and 4B, the end rings 31A and 31B (31) include end ring mating portions 70A and 70B (70) that are convex on one axial side or concave on the other, and the connecting ring portions 42A and 42B (42) include connecting ring mating portions 80A and 80B (80) that fit into the end ring mating portions 70A and 70B. By employing such a mating structure, the circumferential end faces of the end ring mating portion 70 and the circumferential end faces of the connecting ring mating portion 80 can come into contact with each other. Therefore, in embodiments where torque input and output are performed at the flange 41, the end ring mating portion 70 can bias the connecting ring mating portion 80 in the circumferential direction with sufficient force, or the connecting ring mating portion 80 can bias the end ring mating portion 70 in the circumferential direction with sufficient force. As a result, slippage between the end ring mating portion 70 and the connecting ring mating portion 80 can be suppressed when the magnetic pole rotor 30 rotates. The mating of the end ring mating portion 70 and the connecting ring mating portion 80 may be in an interference fit, an intermediate fit, or a clearance fit, but it is preferable to use an interference fit or an intermediate fit.

[0025] In Figure 4A, the end ring mating portion 70A has at least one end ring projection 71 that protrudes on one side in the axial direction, and the connecting ring mating portion 80A has at least one connecting ring recess 82 into which at least one end ring projection 71 fits. In the same figure, multiple matings between the end ring projection 71 and the connecting ring recess 82 are formed along the circumferential direction. As a more specific example, multiple end ring projections 71 and multiple connecting ring recesses 82 are arranged at equal intervals in the circumferential direction (dimension MA in Figure 4A indicates the arrangement interval). In this case, the number of end ring projections 71 and connecting ring recesses 82 may be the same as the number of other end ring projections 71 and connecting ring recesses 82.

[0026] In Figure 4B, the end ring mating portion 70B has at least one end ring recess 72 that is concave on the other side in the axial direction, and the connecting ring mating portion 80B has at least one connecting ring protrusion 81 that fits into at least one end ring recess 72. The connecting ring protrusion 81 is convex on the other side in the axial direction. In the same figure, multiple matings between the end ring recess 72 and the connecting ring protrusion 81 are formed along the circumferential direction. As a more specific example, multiple end ring recesses 72 and multiple connecting ring protrusions 81 are arranged at equal intervals in the circumferential direction (dimension MB in Figure 4B indicates the arrangement interval). In this case, the number of end ring recesses 72 and connecting ring recesses 82 may be the same.

[0027] Note that the end ring mating portion 70 and the connecting ring mating portion 80 are not limited to the structures shown in Figures 4A and 4B. Although detailed illustrations are omitted, the end ring mating portion 70 may have at least one end ring projection 71 and at least one end ring recess 72. In this case, the connecting ring mating portion 80 has at least one connecting ring recess 82 and at least one connecting ring projection 81. Also, the number of end ring projections 71 and end ring recesses 72 may each be singular. Even in this case, mating between the end ring projection 71 and the connecting ring recess 82, and mating between the end ring recess 72 and the connecting ring projection 81 are formed, so it is understood that there are multiple matings between the end ring mating portion 70 and the connecting ring mating portion 80.

[0028] According to the above configuration, the end ring mating portion 70 and the connecting ring mating portion 80 can come into contact in the circumferential direction. Therefore, when torque is transmitted between the end ring 31 and the flange 41, slippage between the end ring 31 and the flange 41 is suppressed. Thus, a magnetic pole rotor 30 is realized that can suppress a decrease in torque transmission efficiency.

[0029] In the examples shown in Figures 4A and 4B, the end ring mating portion 70 is fitted into the connecting ring mating portion 80 in an interference fit. More specifically, the end ring protrusion 71 in Figure 4A is fitted into the connecting ring recess 82 in an interference fit, and the end ring recess 72 in Figure 4B is fitted into the connecting ring protrusion 81 in an interference fit. With the above configuration, slippage between the end ring mating portion 70 and the connecting ring mating portion 80 is further suppressed, so the magnetic pole rotor 30 can further suppress the decrease in torque transmission efficiency. Furthermore, in the examples shown in Figures 4A and 4B, multiple matings between the end ring mating portion 70 and the connecting ring mating portion 80 are formed along the circumferential direction. With this configuration, the locations where torque is transmitted between the end ring mating portion 70 and the connecting ring mating portion 80 are distributed, so damage to at least one of the end ring 31 or the connecting ring portion 42 can be suppressed. Furthermore, in the example shown in the figure, the mating of the end ring mating portion 70 and the connecting ring mating portion 80 is formed at equal intervals along the circumferential direction (see dimensions MA and MB in Figures 4A and 4B). With the above configuration, when torque is transmitted between the end ring mating portion 70 and the connecting ring mating portion 80, the force acting on the end ring 31 and the connecting ring portion 42 can be evenly distributed in the circumferential direction. The number of mating ends between the end ring mating portion 70 and the connecting ring mating portion 80 may be, for example, eight. For example, eight end ring protrusions 71 and eight connecting ring recesses 82 may be arranged at equal intervals in the circumferential direction (see Figure 4A), or eight connecting ring protrusions 81 and eight end ring recesses 72 may be arranged at equal intervals in the circumferential direction (see Figure 4B).

[0030] Returning to Figure 4B, the end ring 31B(31), as previously described, includes a receiving recess 331 for accommodating the end of the non-magnetic material 52. In the example shown in the figure, the receiving recess 331 has a concave bottom surface 332 facing the other axial direction and a pair of concave sides 333 projecting from the concave bottom surface 332 to the other axial direction. The end ring recess 72 also has a concave bottom surface 722 facing one axial direction and a pair of concave sides 723 projecting from the concave bottom surface 722 to the one axial direction. In this disclosure, at least a portion of the receiving recess 331 is circumferentially offset with respect to at least one end ring recess 72. More specifically, at least a portion of the receiving recess 331 is circumferentially offset with respect to any of the multiple end ring recesses 72. In the example shown in the figure, only one concave side surface 333 of the receiving recess 331 is positioned axially aligned with one concave side surface 723 of one of the end ring recesses 72, while the remaining portion of the receiving recess 331 is offset circumferentially from this end ring recess 72.

[0031] When the magnetic pole rotor 30 rotates, torque is transmitted between the non-magnetic material 52 and the receiving recess 331. To avoid damage to at least one of the receiving recess 331 or the non-magnetic material 52, it is preferable to increase the contact area between the receiving recess 331 and the non-magnetic material 52 by making the receiving recess 331 deeper (in other words, by making the concave surface 333 longer in the axial direction). This is because the force acting on the receiving recess 331 and the non-magnetic material 52 can be distributed. On the other hand, the deeper the receiving recess 331 is made, the shorter a specific part of the end ring 31 becomes in the axial direction. More specifically, the part of the end ring 31 located on one side of the receiving recess 331 in the axial direction (this part is indicated by the symbol H in Figure 4B) becomes shorter in the axial direction. As a result, it becomes difficult to ensure the mechanical strength of the end ring 31. In this regard, according to the above configuration, since at least a portion of the receiving recess 331 is offset in the circumferential direction with respect to at least one end ring 31 recess, even if the receiving recess 331 is made deeper, the axial length of the end ring 31, particularly the portion indicated by the symbol H, is prevented from becoming extremely short. Therefore, sufficient depth of the receiving recess 331 can be secured, and damage to at least one of the receiving recess 331 or the non-magnetic material 52 can be avoided.

[0032] The end ring 31B(31) illustrated in Figure 4B further includes an end ring defining projection 317 that protrudes on the other side in the axial direction. The end ring defining projection 317 is aligned in the axial direction with one of the pole pieces 55. In the example shown in the figure, multiple end ring projections 71 are each aligned in the axial direction with multiple pole pieces 55. The circumferential length of the end ring defining projection 317 is the same as the circumferential length of the pole piece 55. At least a portion of the end ring defining projection 317 is aligned in the axial direction with the end ring recess 72. In the example shown in the figure, the end ring defining projection 317 and the end ring recess 72 are aligned in the circumferential direction, and the circumferential range in which the end ring defining projection 317 is located is included in the circumferential range in which the end ring recess 72 is located. According to the above configuration, the portion of the end ring 31 located on the other axial side of the end ring recess 72 (indicated by the symbol J in Figure 4B) is utilized for the end ring protrusion 71, thereby preventing the axial shortening of this portion. Thus, the mechanical strength of the end ring 31 can be ensured. Furthermore, if the circumferential length of the end ring defined projection 317 differs from the circumferential length of the magnetic pole piece 55, it becomes necessary to form irregularities on the circumferential end face of the non-magnetic material 52 adjacent to the magnetic pole piece 55, according to the deviation in their circumferential lengths. In this case, stress concentration may occur in the non-magnetic material 52 when torque is transmitted between the magnetic pole piece 55 and the non-magnetic material 52. In this regard, in one embodiment of the present disclosure, since the circumferential length of the end ring defined projection 317 is the same as the circumferential length of the magnetic pole piece 55, irregularities on the circumferential end face of the non-magnetic material 52 become unnecessary, and the mechanical strength of the non-magnetic material 52 can be ensured.

[0033] As illustrated in Figure 4B, the depth of the accommodating recess 331 (i.e., the axial length of the pair of concave surfaces 333) is greater than the depth of the end ring recess 72 (i.e., the axial length of the pair of concave surfaces 723). For example, the depth of the accommodating recess 331 is 100% or more and 500% or less of the depth of the end ring recess 72. With the above configuration, by making the accommodating recess 331 deeper, the force acting on the accommodating recess 331 and the non-magnetic material 52 can be further dispersed. This further prevents damage to at least one of the accommodating recess 331 or the non-magnetic material 52.

[0034] The connecting ring portion 42B(42) illustrated in Figure 4B includes a defining hole portion 45 that defines a space S1 formed between any two circumferentially adjacent connecting ring protrusions 81. Both ends of the defining hole portion 45 are formed by the circumferential end faces of the adjacent connecting ring protrusions 81. The end ring 31B(31) further includes an insertion portion 38 positioned inside the defining hole portion 45. The insertion portion 38 has a shape that is convex toward one side in the axial direction. Therefore, the portion of the end ring 31 located on the other side in the axial direction from the insertion portion 38 (indicated by the symbol K in Figure 4B) is understood to be a relatively long portion in the axial direction. In the example shown, the circumferential length (dimension NA) of the insertion portion 38 is longer than the circumferential length (dimension NB) of each connecting ring protrusion 81. In the example shown, the circumferential length of the insertion portion 38 is 100% or more and 400% or less of the circumferential length of the connecting ring protrusions 81. According to the above configuration, the circumferential length of the insertion portion 38 can be increased, so that a larger portion of the end ring 31 that is long in the axial direction can be secured. This improves the mechanical strength of the end ring 31.

[0035] Returning to Figure 4A, at least one of the multiple non-magnetic materials 52 includes an axially open non-magnetic hole 59. In the example shown in the figure, each of the multiple non-magnetic materials 52 includes multiple non-magnetic holes 59. The end ring 31A(31) includes an axially open first end ring hole 311, and the connecting ring portion 42A(42) includes an axially open first connecting ring hole 411. The first end ring hole 311 faces the non-magnetic hole 59, and the first connecting ring hole 411 faces the first end ring hole 311. In other words, the non-magnetic holes 59, the first end ring hole 311, and the first connecting ring hole 411 are in communication with each other and form an air passage. When the pole rotor 30 rotates, air can flow axially through this passage and cool the pole rotor 30. Furthermore, the air may also be used to cool the components of the magnetic gear electromachine 1 located around the magnetic pole rotor 30.

[0036] In the example shown in Figure 4A, each of the multiple non-magnetic materials 52 includes a non-magnetic material pore 59, and the same number of first end ring pores 311 and first connecting ring pores 411 are provided as the number of non-magnetic material pores 59. Therefore, each of the multiple first end ring pores 311 faces each of the multiple non-magnetic material pores 59, and each of the multiple first connecting ring pores 411 faces each of the multiple first end ring pores 311. The first end ring pores 311 of the end ring 31A are positioned circumferentially offset from the end ring mating portion 70A (end ring protrusion 71), and the first connecting ring pores 411 of the connecting ring portion 42A are positioned circumferentially offset from the connecting ring mating portion 80A (connecting ring recess 82). The non-magnetic material pores 59, first end ring pores 311, and first connecting ring pores 411 exemplified in Figure 4A are also applicable to the configuration exemplified in Figure 4B. To avoid repetition in the explanation, a detailed explanation will be omitted.

[0037] With the above configuration, the non-magnetic material holes 59, the first end ring holes 311, and the first connecting ring holes 411 can form air passages. Therefore, the temperature rise of the magnetic pole rotor 30 can be suppressed.

[0038] In some embodiments, a shaft member may be inserted inside the non-magnetic material hole 59, the first end ring hole 311, and the first connecting ring hole 411. Figure 5 is a schematic diagram showing the fitting structure of the end ring 31C(31) and the connecting ring portion 42C(42) according to another embodiment. In Figure 5, each of the multiple non-magnetic materials 52 includes a multiple non-magnetic material hole 59, the end ring 31C(31) includes a multiple first end ring hole 311, and the connecting ring portion 42C(42) includes a multiple first connecting ring hole 411. In the example shown in the figure, fastening shafts 88 are provided that are inserted into the non-magnetic material holes 59, the first end ring holes 311, and the first connecting ring holes 411. For example, the fastening shafts 88 may be screws or bolts. When the fastening shafts 88 are tightened, the connecting ring portion 42 is pressed against the annular unit 50. The fastening shafts 88 may be provided at equal intervals in the circumferential direction. However, the fastening shafts 88 do not have to be inserted into all of the non-magnetic material holes 59, the first end ring holes 311, and the first connecting ring holes 411.

[0039] With the above configuration, the fastening shaft 88 is inserted into the non-magnetic hole 59, the first end ring hole 311, and the first connecting ring hole 411, thereby increasing the rigidity of the magnetic pole rotor 30 and enabling vibration isolation design for the magnetic pole rotor 30.

[0040] Although not essential components of this disclosure, as illustrated in Figure 5, at least one of the pole pieces 55 may have an axially open pole piece hole 56. The end ring 31C(31) may also include an axially open second end ring hole 322, and the connecting ring portion 42C(42) may include an axially open second connecting ring hole 422. The second end ring hole 322 faces the pole piece hole 56, and the second connecting ring hole 422 faces the second end ring hole 322. In other words, the pole piece hole 56, the second end ring hole 322, and the second connecting ring hole 422 are in communication with each other and form an air passage. When the pole piece rotor 30 rotates, air can flow axially through this passage and cool the pole piece rotor 30. Furthermore, the air may also cool the components of the magnetic gear electromachine 1 located around the magnetic pole rotor 30. The magnetic pole hole 56, the second end ring hole 322, and the second connecting ring hole 422 may or may not be applied to the configuration illustrated in Figures 4A and 4B.

[0041] With the above configuration, the pole piece hole 56, the second end ring hole 322, and the second connecting ring hole 422 can form an air passage. Therefore, the temperature rise of the pole piece rotor 30 can be suppressed.

[0042] <5. Other examples of the interlocking structure of the end ring 31 and the connecting ring portion 42> As illustrated in Figure 5, the connecting ring mating portion 80C(80) of the connecting ring portion 42C(42) includes a first protrusion 181 and a second protrusion 182. The first protrusion 181 and the second protrusion 182 are convex toward the other side in the axial direction and are adjacent to each other with a gap in the circumferential direction. The end face of the first protrusion 181 opposite to the second protrusion 182 is the first outer surface 191, and the end face on the side of the second protrusion 182 is the first defined surface 193. The end face of the second protrusion 182 opposite to the first protrusion 181 is the second outer surface 192, and the end face on the side of the first protrusion 181 is the second defined surface 194. Furthermore, the connecting ring mating portion 80C further includes an intermediate hole portion 185 that defines the space S2 formed between the first protrusion 181 and the second protrusion 182. The circumferential ends of the intermediate hole 185 are formed by the first defined surface 193 of the first protrusion 181 and the second defined surface 194 of the second protrusion 182. The end ring mating portion 70C(70) of the end ring 31C(31) includes a mating recess 175 into which the first protrusion 181 and the second protrusion 182 fit. The mating recess 175 has a bottom surface 177 facing one side in the axial direction and an intermediate protrusion 176 that protrudes to one side from the bottom surface 177. In this embodiment, the intermediate protrusion 176 is fitted into the intermediate hole 185 in a gap-fit ​​state.

[0043] According to the above configuration, since the first protrusion 181 and the second protrusion 182 are fitted into the mating recess 175, it is not necessary to strictly control the dimensional tolerances of the first defined surface 193, which is one end of the first protrusion 181 in the circumferential direction, and the second defined surface 194, which is the other end of the second protrusion 182 in the circumferential direction, thus simplifying the structure of the magnetic pole rotor 30. Furthermore, in the assembly process of the connecting ring mating portion 80 and the end ring 31, the intermediate protrusion 176 and the mating recess 175, which are fitted together in a gap-fit ​​state, serve as guides when the first protrusion 181 and the second protrusion 182 are fitted into the mating recess 175, thus simplifying the assembly process of the magnetic pole rotor 30. Even if the configuration is such that the first protrusion 181 and the second protrusion 182 fit into a single mating recess 175, it is understood that there are multiple matings between the end ring mating portion 70C and the connecting ring portion 42C.

[0044] In some embodiments, the interlocking recess 175 has a first inner surface 171 that abuts against the first outer surface 191 of the first protrusion 181, and a second inner surface 172 that abuts against the second outer surface 192 of the second protrusion 182. The first protrusion 181 and the second protrusion 182 are then fitted into the interlocking recess 175 in an interference fit. More specifically, the first outer surface 191 of the first protrusion 181 presses against the first inner surface 171, and the second outer surface 192 of the second protrusion 182 presses against the second inner surface 172.

[0045] According to the above configuration, the parts of the mating recess 175 that actively contact the first protrusion 181 or the second protrusion 182 are the first inner surface 171 and the second inner surface 172. Therefore, when the magnetic pole rotor 30 rotates to one side in the circumferential direction, one of the first inner surface 171 or the second inner surface 172 actively transmits torque to the connecting ring mating portion 80, and when the magnetic pole rotor 30 rotates to the opposite side, the other of the first inner surface 171 or the second inner surface 172 actively transmits torque to the connecting ring mating portion 80. As a result, the part of the end ring mating portion 70 and the mating recess 175 to which force acts changes depending on the rotation direction of the magnetic pole rotor 30. Therefore, the mechanical durability of the end ring mating portion 70 and the connecting ring mating portion 80 can be improved compared to the case where the part to which force acts is the same regardless of the rotation direction.

[0046] In some embodiments, multiple interlocking recesses 175 may be arranged at equal intervals in the circumferential direction. In this case, the number of interlocking recesses 175 is equal to the number of first protrusions 181 and second protrusions 182, respectively.

[0047] <6. Additional examples of the interlocking structure of the end ring 31 and the connecting ring portion 42> As illustrated in Figure 6, the end ring 31D (31) includes an end ring mating portion 70D (70), and the end ring mating portion 70D includes an end ring recess 72D (72) that is recessed to the other side in the axial direction. Both the circumferential end face and the other end face of the end ring recess 72 are end ring inclined surfaces 77 that are inclined with respect to the axial direction. The connecting ring portion 42D (42) includes a connecting ring mating portion 80D (80), and the connecting ring mating portion 80D includes a connecting ring projection 81D (81) that fits into the end ring recess 72. The connecting ring projection 81D includes a pair of connecting ring inclined surfaces 87. Each of the pair of connecting ring inclined surfaces 87 faces the pair of end ring inclined surfaces 77. The connecting ring inclined surfaces 87 are parallel to the end ring inclined surfaces 77.

[0048] According to the above configuration, in the process of fitting the end ring fitting portion 70 into the connecting ring fitting portion 80, the inclined surface 77 of the end ring and the inclined surface 87 of the connecting ring serve as guides for fitting. Therefore, the assembly process of the magnetic pole rotor 30 can be simplified.

[0049] Furthermore, one of the pair of end ring inclined surfaces 77 may be omitted. For example, one end face of the end ring recess 72 in the circumferential direction may be parallel to the axial direction. In this case, one of the pair of connecting ring inclined surfaces 87 may also be omitted. Moreover, the end ring mating portion 70D may include an end ring protrusion 71 (see Figure 4A) instead of the end ring recess 72D, and an end ring inclined surface 77 may be formed on one end face of this end ring protrusion 71 in the circumferential direction. In this case, the connecting ring mating portion 80 may include a connecting ring recess 82 instead of the connecting ring protrusion 81, and a connecting ring inclined surface 87 may be formed on one end face of the connecting ring recess 82 in the circumferential direction. In any embodiment, the above advantages can be obtained.

[0050] In some embodiments, the end ring inclined surface 77 is inclined such that its acute angle with respect to the axial direction (see angle θ in Figure 6) is greater than 0 degrees and 10 degrees or less. Similarly, the connecting ring inclined surface 87 is inclined such that its acute angle with respect to the axial direction is greater than 0 degrees and 10 degrees or less. With the above configuration, the inclination of the end ring inclined surface 77 and the connecting ring inclined surface 87 with respect to the axial direction can be suppressed, so that when torque is transmitted between the end ring 31D and the connecting ring portion 42D, the axial displacement between the end ring 31D and the connecting ring portion 42D can be suppressed.

[0051] Figure 7 is a conceptual perspective view showing a flange 41A(41) according to one embodiment of the present disclosure. The flange 41A(41) includes a flange body 450 having an outer peripheral surface 452 that extends in the circumferential direction. The flange body 450 is ring-shaped in an axial view, and the outer peripheral surface 452 extends around the entire circumference of the flange body 450. The support column 47 (see Figure 3) described above extends radially inward from the inner peripheral surface of the flange body 450.

[0052] The connecting ring portion 42E(42) provided on the outer peripheral surface 452 includes a connecting ring fitting portion 80E(80), and the connecting ring fitting portion 80E includes a connecting ring projection portion 81E(81). As previously described, the connecting ring projection portion 81E(81) fits into the end ring recess 72 (see Figure 4A). This connecting ring projection portion 81E has an opposing surface 457 that faces the end ring recess 72 in the circumferential direction and extends along the radial direction, and a connecting inclined surface 459 that connects the radial inner end of the opposing surface 457 to the outer peripheral surface 452. The connecting inclined surface 459 is inclined with respect to the radial direction and, in the example shown in the figure, extends in a curve with respect to the radial direction. In other embodiments, the connecting inclined surface 459 may extend linearly with respect to the radial direction. In the example shown in Figure 7, opposing surfaces 457 and connecting inclined surfaces 459 are formed at each of the circumferential ends of the connecting ring projection 81E. Alternatively, the opposing surface 457 and connecting inclined surface 459 may be formed at only one circumferential end of the connecting ring projection 81E. Although not shown in detail, the connecting ring mating portion 80E may also include a connecting ring recess 82 (see Figure 4B), and the opposing surface 457 and connecting inclined surface 459 may be formed at at least one circumferential end of the connecting ring recess 82.

[0053] According to the above configuration, the provision of the connecting inclined surface 459 makes it possible to suppress the concentration of stress on the radially inner end of the opposing surface 457 when torque is transmitted between the connecting ring mating portion 80 and the end ring mating portion 70. This makes it possible to avoid damage to the connecting ring portion 42E(42).

[0054] <7. Details of the structure of the separate end ring 34 and separate flange 44> Figure 8A shows an alternative end ring 34A(34) and flange 44A(44) according to one embodiment of the present disclosure, and Figure 8B shows an alternative end ring 34B(34) and flange 44B(44) according to another embodiment of the present disclosure.

[0055] In the example shown in Figure 8A, the separate end ring 34A and the separate flange 44A do not employ a mating structure like that of the end ring 31 and the connecting ring portion 42. That is, the separate end ring 34A has an end ring end face 134A (134) that faces the other side in the axial direction and extends in the circumferential direction. The end ring end face 134A is a flat surface that extends over the entire circumference of the separate end ring 34. The separate connecting ring portion 49A (49) of the separate flange 44A has a connecting ring end face 149A (149) that faces the end ring end face 134A. The connecting ring end face 149A is also a flat surface that extends over the entire circumference of the separate flange 44A. In embodiments in which the separate end ring 34A and the separate flange 44A are employed, it is preferable that one side of the rotating shaft A in the axial direction (rotating shaft A1 in the example of Figures 1A and 1B) is connected to an external rotating device. This avoids active torque transmission between the separate end ring 34A and the separate flange 44A.

[0056] According to the above configuration, since a structure in which a separate end ring 34 and a connecting ring portion 42 are fitted together is not adopted on the other axial side of the magnetic pole rotor 30, the structure of the magnetic pole rotor 30 can be simplified.

[0057] In the example shown in Figure 8A, the separate end ring 34A(34) includes a third end ring hole 133 that faces the non-magnetic material hole 59 of the non-magnetic material 52 and is open in the axial direction, and the separate connecting ring portion 49A(49) includes a third connecting ring hole 243 that faces the third end ring hole 133 and is open in the axial direction. With this configuration, the non-magnetic material hole 59, the third end ring hole 133, and the third connecting ring hole 243 may form an air passage. Furthermore, the separate end ring 34A(34) may also include a fourth end ring hole 134 that faces the magnetic pole piece hole 56 of the magnetic pole piece 55 and is open in the axial direction, and the separate connecting ring portion 49A(49) may also include a fourth connecting ring hole 244 that faces the fourth end ring hole 134 and is open in the axial direction. In this configuration, the magnetic pole hole 56, the fourth end ring hole 134, and the fourth connecting ring hole 244 may form air passages. In some embodiments, the fastening shaft 88 (see Figure 5) inserted into the non-magnetic hole 59 may also be inserted into the third end ring hole 133 and the third connecting ring hole 243.

[0058] In the example shown in Figure 8B, a mating structure such as that between an end ring 31 and a connecting ring portion 42 is employed for the separate end ring 34B and the separate flange 44B. Specifically, the separate end ring 34B includes a separate end ring mating portion 270 that is convex on the other axial side or concave on one side, and the separate connecting ring portion 49B (49) includes a separate connecting ring mating portion 280 that fits into the separate end ring mating portion 270. The mating between the separate end ring mating portion 270 and the separate connecting ring mating portion 280 may be in an interference fit state, an intermediate fit state, or a clearance fit state, but it is preferable that the mating be in an interference fit state or an intermediate fit state.

[0059] In the example shown in Figure 8B, the separate end ring mating portion 270 may have at least one separate end ring protrusion 271 that is convex on one side in the axial direction, and the separate connecting ring mating portion 280 may have a separate connecting ring recess 282 that fits into at least one separate end ring protrusion 271. The separate end ring protrusion 271 and the separate connecting ring recess 282 may be arranged at equal intervals in the circumferential direction. Although not shown in detail, the separate end ring mating portion 270 may also include at least one separate end ring recess that is concave on the other side in the axial direction. In this case, the separate connecting ring mating portion 280 may also include at least one separate connecting ring protrusion that fits into at least one separate end ring recess. The separate connecting ring protrusion is convex on one side in the axial direction. In embodiments in which the separate end ring 34B and separate flange 44B are used, the other side in the axial direction of the rotating shaft A (rotating shaft A2 in the example of Figures 1A and 1B) may be connected to an external rotating device.

[0060] With the above configuration, slippage can be suppressed regardless of whether the torque transmission between the magnetic pole rotor 30 and the external rotating equipment is performed via flange 41 or another flange 44.

[0061] <8. Summary> The contents described in some of the embodiments above can be understood, for example, as follows:

[0062] 1) A pole rotor (30) according to at least one embodiment of the present disclosure is: A magnetic pole rotor provided in a magnetic gear electromachine (1), The annular unit (50) includes a plurality of magnetic pole pieces (55) and a plurality of non-magnetic materials (52) arranged alternately in the circumferential direction of the magnetic gear electromachine, An end ring (31) connected to the end of the annular unit on one axial side of the magnetic gear electromachine, A flange (41) including a connecting ring portion (42) that connects to the end ring from one side, Equipped with, The end ring includes an end ring mating portion (70) which is convex on one side in the axial direction or concave on the other side. The connecting ring portion includes a connecting ring mating portion (80) that fits into the end ring mating portion.

[0063] According to the configuration described in 1) above, the end ring mating portion and the connecting ring mating portion can come into contact in the circumferential direction. Therefore, when torque is transmitted between the end ring and the flange, slippage between the end ring and the flange is suppressed. Thus, a magnetic pole rotor that can suppress a decrease in torque transmission efficiency is realized.

[0064] 2) In some embodiments, the pole rotor described in 1) above, The connecting ring fitting portion has at least one connecting ring projection (81) that protrudes toward the other side, The end ring fitting portion has at least one end ring recess (72) into which the at least one connecting ring protrusion fits, The end ring is a receiving recess for accommodating one end of any of the nonmagnetic materials on one side, and further includes a receiving recess (331) that is recessed on the one side in the axial direction, At least a portion of the receiving recess is offset in the circumferential direction with respect to the at least one end ring recess.

[0065] Since torque is transmitted between the non-magnetic material and the receiving recess, it is preferable to deepen the receiving recess to distribute the force acting on the receiving recess and the non-magnetic material in order to avoid damage to at least one of the receiving recess or the non-magnetic material. On the other hand, the deeper the receiving recess, the shorter a specific part of the end ring becomes in the axial direction, making it difficult to ensure the mechanical strength of the end ring. In this regard, according to the configuration of 2) above, at least a part of the receiving recess is offset in the circumferential direction with respect to at least one end ring recess, so even if the receiving recess is deepened, the axial length of the end ring is prevented from becoming extremely short. Therefore, the depth of the receiving recess can be sufficiently secured, and damage to at least one of the receiving recess or the non-magnetic material can be avoided.

[0066] 3) In some embodiments, the pole rotor described in 2) above, The end ring further includes an end ring defining projection (317) that is convex to the other side and is aligned in the axial direction with one of the magnetic pole pieces. At least a portion of the end ring defining protrusion is aligned with the end ring recess in the axial direction.

[0067] According to the configuration described in 3) above, the portion of the end ring located on the other side in the axial direction from the end ring recess is utilized for the end ring protrusion, thus preventing the axial shortening of that portion. Therefore, the mechanical strength of the end ring can be ensured.

[0068] 4) In some embodiments, the pole rotor described in 2) or 3) above, The depth of the receiving recess is greater than the depth of the end ring recess.

[0069] According to the configuration described in 4) above, by making the receiving recess deeper, the force acting on the receiving recess and the non-magnetic material can be further dispersed. This makes it possible to further avoid damage to at least one of the receiving recess or the non-magnetic material.

[0070] 5) In some embodiments, a pole rotor according to any of 1) to 4) above, The end ring mating portion is fitted into the connecting ring mating portion in an interference fit state.

[0071] According to the configuration described in 5) above, slippage between the end ring mating portion and the connecting ring mating portion is further suppressed, so the magnetic pole rotor can further suppress the decrease in torque transmission efficiency.

[0072] 6) In some embodiments, a pole rotor according to any of 1) to 5) above, Multiple matings between the end ring mating portion and the connecting ring mating portion are formed along the circumferential direction.

[0073] According to the configuration described in 6) above, the location where torque is transmitted between the end ring mating portion and the connecting ring mating portion is distributed, thereby suppressing damage to at least one of the end ring or the connecting ring.

[0074] 7) In some embodiments, the pole rotor described in 6) above, The mating between the end ring mating portion and the connecting ring mating portion is configured to be formed at equal intervals along the circumferential direction.

[0075] According to the configuration described in 7) above, when torque is transmitted between the end ring mating portion and the connecting ring mating portion, the force acting on the end ring and the connecting ring portion can be evenly distributed in the circumferential direction.

[0076] 8) In some embodiments, a pole rotor according to any one of 1) to 7) above, The connecting ring mating portion has a plurality of connecting ring protrusions (81) that are convex to the other side and are spaced apart in the circumferential direction. The end ring fitting portion has a plurality of end ring recesses (72) into which the plurality of connecting ring protrusions each fit, The connecting ring portion includes a defining hole (45) that defines the space formed between any two of the connecting ring protrusions adjacent in the circumferential direction, The end ring further includes an insertion portion (38) positioned inside the specified hole, The circumferential length of the insertion portion is longer than the circumferential length of each of the connecting ring protrusions.

[0077] According to the configuration described in 8) above, the circumferential length of the insertion portion can be increased, thus allowing for a larger portion of the end ring that is long in the axial direction. This improves the mechanical strength of the end ring.

[0078] 9) In some embodiments, a pole rotor according to any of 1) to 8) above, At least one of the plurality of nonmagnetic materials includes a nonmagnetic pore (59) that is open in the axial direction, The end ring includes a first end ring hole (311) that faces the non-magnetic hole and is open in the axial direction. The connecting ring portion includes a first connecting ring hole (411) that faces the first end ring hole and is open in the axial direction.

[0079] According to the configuration described in 9) above, the non-magnetic material holes, the first end ring holes, and the first connecting ring holes can form air passages. Therefore, the temperature rise of the magnetic pole rotor can be suppressed.

[0080] 10) In some embodiments, the pole rotor described in 9) above, Each of the aforementioned plurality of non-magnetic materials includes the non-magnetic material pores, The end ring further includes a plurality of first end ring holes, each facing a plurality of the plurality of non-magnetic holes, The connecting ring portion further includes a plurality of first connecting ring holes, each facing a plurality of first end ring holes, The fastening shaft extending in the axial direction further comprises a fastening shaft (88) inserted into the non-magnetic material hole, the first end ring hole, and the first connecting ring hole.

[0081] According to the configuration described in 10) above, the non-magnetic material hole, the first connecting hole, and the fastening shaft are inserted into the first connecting hole, thereby increasing the rigidity of the magnetic pole rotor and enabling vibration isolation design in the magnetic pole rotor.

[0082] 11) In some embodiments, a pole rotor according to any one of 1) to 10) above, At least one of the plurality of pole pieces includes a pole piece hole (56) that is open in the axial direction, The end ring further includes a second end ring hole (322) that faces the magnetic pole hole and is open in the axial direction. The connecting ring portion further includes a second connecting ring hole (422) that faces the second end ring hole and is open in the axial direction.

[0083] According to the configuration described in 11) above, the pole piece hole, the second end ring hole, and the second connecting ring hole can form an air passage. Therefore, the temperature rise of the pole piece rotor can be suppressed.

[0084] 12) In some embodiments, a pole rotor according to any one of 1) to 11) above, The aforementioned connecting ring fitting portion is The first convex portion (181) and the second convex portion (182) are convex on the other side and are adjacent to each other with a gap in the circumferential direction, An intermediate hole (185) that defines the space formed between the first protrusion and the second protrusion, Includes, The end ring mating portion is a mating recess into which the first protrusion and the second protrusion fit, and includes a mating recess (175) having a bottom surface (177) facing one side and an intermediate protrusion (176) that protrudes from the bottom surface toward the one side. The aforementioned intermediate protrusion is fitted into the intermediate hole in a gap-fitting manner.

[0085] According to the configuration described in 12) above, since the first and second protrusions are fitted into the mating recess, there is no need to strictly control the dimensional tolerances of one end of the first protrusion in the circumferential direction and the other end of the second protrusion in the circumferential direction, thus simplifying the structure of the magnetic pole rotor. Furthermore, in the assembly process of the connecting ring mating portion and the end ring, the intermediate protrusion and mating recess, which are fitted together in a gap-fit ​​state, serve as guides for the first and second protrusions to fit into the mating recess, thus simplifying the assembly process of the magnetic pole rotor.

[0086] 13) In some embodiments, the pole rotor described in 12) above, The aforementioned fitting recess is, The first inner surface (171) that abuts against the first outer surface (191) of the first protrusion that is opposite to the second protrusion, The second protrusion has a second inner surface (172) that abuts against the second outer surface (192) opposite to the first protrusion, The first and second protrusions are fitted into the interlocking recess in an interference fit manner.

[0087] According to the configuration described in 13) above, the parts of the mating recess that actively contact the first or second protrusion are the first inner surface and the second inner surface. Therefore, when the magnetic pole rotor rotates to one side in the circumferential direction, one of the first inner surface or the second inner surface actively transmits torque to the connecting ring mating portion, and when the magnetic pole rotor rotates to the opposite side, the other of the first or second inner surface actively transmits torque to the connecting ring mating portion. As a result, the part of the end ring mating portion and the mating recess on which force acts changes depending on the rotation direction of the magnetic pole rotor. Therefore, the mechanical durability of the end ring mating portion and the connecting ring mating portion can be improved compared to the case where the part on which force acts is the same regardless of the rotation direction.

[0088] 14) In some embodiments, a pole rotor according to any one of 1) to 13) above, The end ring mating portion includes an end ring inclined surface (77) which is one end face in the circumferential direction and is inclined with respect to the axial direction. The connecting ring mating portion includes a connecting ring inclined surface (87) that faces the end ring inclined surface.

[0089] According to the configuration described in 14) above, in the process of fitting the end ring mating portion into the mating hole portion, the inclined surface of the end ring and the inclined surface of the connecting ring serve as guides for mating. Therefore, the assembly process of the magnetic pole rotor can be simplified.

[0090] 15) In some embodiments, the pole rotor described in 14) above, The inclined surface of the end ring is inclined such that the acute angle (angle θ) with respect to the axial direction is 10 degrees or less.

[0091] According to the configuration described in 15) above, the inclination of the end ring inclined surface and the connecting ring inclined surface with respect to the axial direction can be suppressed, so that when torque is transmitted between the end ring and the connecting ring portion, the axial displacement between the end ring and the connecting ring portion can be suppressed.

[0092] 16) In some embodiments, a pole rotor according to any one of 1) to 15) above, The flange further includes a flange body portion (450) having an outer peripheral surface (452) that extends in the circumferential direction, The connecting ring portion is provided on the outer circumferential surface of the flange body portion, The aforementioned connecting ring fitting portion is The end ring mating portion has an opposing surface (457) that faces it in the circumferential direction and extends along the radial direction of the magnetic gear electromachine, A connecting inclined surface (459) is connected to the radial inner end of the opposing surface and the outer circumferential surface, and is inclined with respect to the radial direction, It holds.

[0093] According to the configuration described in 16) above, the provision of a connecting inclined surface prevents stress from concentrating at the radially inner end of the opposing surface 457 when torque is transmitted between the connecting ring mating portion and the end ring mating portion. This prevents damage to the connecting ring portion.

[0094] 17) In some embodiments, a pole rotor according to any one of 1) to 16) above, A separate end ring (34) is connected to the other end of the annular unit, A separate flange (44) including a separate connecting ring portion (49) that connects to the separate end ring from the other side, Equipped with, The aforementioned end ring has an end ring end face (134A) that faces the other side and extends in the circumferential direction, The aforementioned separate connecting ring portion has a connecting ring end face (149A) that is in contact with and opposite to the end face of the end ring.

[0095] According to the configuration described in 17) above, a structure in which a separate end ring and a connecting ring portion are fitted together is not employed on the other axial side of the pole rotor, thus simplifying the structure of the pole rotor.

[0096] 18) In some embodiments, a pole rotor according to any one of 1) to 16) above, A separate end ring (34) is connected to the other end of the annular unit, A separate flange (44) including a separate connecting ring portion that connects to the separate end ring from the other side, Equipped with, The aforementioned separate end ring includes a separate end ring mating portion (270) which is convex on the other side in the axial direction or concave on one side. The aforementioned separate connecting ring portion includes a separate connecting ring mating portion (280) that fits into the aforementioned separate end ring mating portion.

[0097] According to the configuration described in 18) above, slippage can be suppressed regardless of whether the torque transmission between the magnetic pole rotor and the external rotating equipment is performed via a flange or another flange.

[0098] 19) A magnetic gear electromachine (1) according to at least one embodiment of the present disclosure is: A magnetic pole rotor (30) as described in any of 1) to 18) above, A stator (20) including the annular unit and stator coils (coils 99) arranged radially, A magnetic rotor (30) including a rotor magnet (19) positioned on the opposite side of the annular unit from the stator coil, It is equipped with.

[0099] According to the configuration described in 19) above, a magnetic gear electromachine that can suppress a decrease in torque transmission efficiency is realized for the same reasons as described in 1) above. [Explanation of symbols]

[0100] 1: Magnetic gear electrical machinery 10: Magnetic rotor 19: Rotor magnet 20: Stator 30: Magnetic pole rotor 31: End ring 34: Separate end ring 38: Insertion part 41: Flange 42: Connecting ring section 44: Different flange 45: Specified hole part 49: Separate connecting ring section 50: Ring Unit 52: Non-magnetic material 55 :Magnetic pole piece 56: Magnetic pole piece hole 59: Non-magnetic hole 70: End ring mating section 70A: End ring mating section 70B: End ring mating section 70C: End ring fitting section 70D: End ring fitting section 72: End ring recess 77: End ring inclined surface 80: Connecting ring fitting part 81: Connecting ring protrusion 87: Connecting ring inclined surface 88: Fastening shaft 99: Coil 134A: End ring end face 149A: End face of connecting ring 171: 1st inner surface 172:Second inner surface 175: Fitting recess 176: Intermediate protrusion 177: Bottom 181: First protrusion 182: Second convex part 185: Intermediate hole 191: 1st outer surface 192: 2nd outer surface 270: Separate end ring fitting part 280: Separate connecting ring fitting part 311: First end ring hole 317: End ring specified protrusion 322: Second end ring hole 331: Receiving recess 335: End face 411: First connecting ring hole 422: Second connecting ring hole 450: Flange body 452: Outer surface 457: Opposite side 459: Connecting inclined surface S1,S2: Space θ: angle

Claims

1. A magnetic pole rotor provided in a magnetic gear electromachine, The annular unit comprising a plurality of magnetic pole pieces and a plurality of non-magnetic materials arranged alternately in the circumferential direction of the magnetic gear electromachine, An end ring connected to the end of the annular unit on one axial side of the magnetic gear electromachine, A flange including a connecting ring portion that connects to the end ring from one side, Equipped with, The end ring includes an end ring mating portion which is convex on one side or concave on the other side in the axial direction. The connecting ring portion includes a connecting ring fitting portion that fits into the end ring fitting portion. Magnetic pole rotor.

2. The connecting ring fitting portion has at least one connecting ring projection that protrudes toward the other side, The end ring fitting portion has at least one end ring recess into which the at least one connecting ring protrusion fits, The end ring is a receiving recess for accommodating one end of any of the nonmagnetic materials on one side, and further includes a receiving recess that is recessed on the one side in the axial direction, At least a portion of the receiving recess is offset in the circumferential direction with respect to at least one end ring recess. The magnetic pole rotor according to claim 1.

3. The end ring further includes an end ring defining projection that protrudes toward the other side, and which is aligned in the axial direction with one of the magnetic pole pieces. At least a portion of the end ring defining protrusion is aligned with the end ring recess in the axial direction. The magnetic pole rotor according to claim 2.

4. The depth of the receiving recess is greater than the depth of the end ring recess. The magnetic pole rotor according to claim 2 or 3.

5. The end ring mating portion is fitted into the connecting ring mating portion in an interference fit state. A magnetic pole rotor according to any one of claims 1 to 3.

6. Multiple matings between the end ring mating portion and the connecting ring mating portion are formed along the circumferential direction. A magnetic pole rotor according to any one of claims 1 to 3.

7. The mating between the end ring mating portion and the connecting ring mating portion is configured to be formed at equal intervals along the circumferential direction. The magnetic pole rotor according to claim 6.

8. The connecting ring fitting portion has a plurality of connecting ring protrusions that are convex to the other side and are arranged at intervals in the circumferential direction. The end ring fitting portion has a plurality of end ring recesses into which the plurality of connecting ring protrusions each fit, The connecting ring portion includes a defining hole portion that defines the space formed between any two of the connecting ring protrusions adjacent in the circumferential direction, The end ring further includes an insertion portion positioned inside the specified hole, The circumferential length of the insertion portion is longer than the circumferential length of each of the connecting ring protrusions. A magnetic pole rotor according to any one of claims 1 to 3.

9. At least one of the plurality of nonmagnetic materials includes a nonmagnetic pore that is open in the axial direction, The end ring includes a first end ring hole that faces the non-magnetic hole and is open in the axial direction. The connecting ring portion includes a first connecting ring hole portion that is opposite to the first end ring hole portion and is open in the axial direction. A magnetic pole rotor according to any one of claims 1 to 3.

10. Each of the aforementioned plurality of non-magnetic materials includes the non-magnetic material pores, The end ring further includes a plurality of first end ring holes, each facing a plurality of the plurality of non-magnetic material holes, The connecting ring portion further includes a plurality of first connecting ring holes, each facing a plurality of first end ring holes, The fastening shaft extending in the axial direction further comprises the non-magnetic material hole, the first end ring hole, and the first connecting ring hole, The magnetic pole rotor according to claim 9.

11. At least one of the plurality of pole pieces includes a pole piece hole that is open in the axial direction, The end ring further includes a second end ring hole that faces the magnetic pole hole and is open in the axial direction, The connecting ring portion further includes a second connecting ring hole portion that is opposite to the second end ring hole portion and is open in the axial direction. A magnetic pole rotor according to any one of claims 1 to 3.

12. The aforementioned connecting ring fitting portion is The first and second protrusions are convex on the other side and are adjacent to each other with a gap in the circumferential direction, An intermediate hole that defines the space formed between the first protrusion and the second protrusion, Includes, The end ring fitting portion is a fitting recess into which the first protrusion and the second protrusion fit, and includes a bottom surface facing one side and an intermediate protrusion that protrudes from the bottom surface toward the one side. The aforementioned intermediate protrusion is fitted into the intermediate hole in a gap-fitting manner. A magnetic pole rotor according to any one of claims 1 to 3.

13. The aforementioned fitting recess is, The first inner surface of the first protrusion that abuts the first outer surface opposite to the second protrusion, The second protrusion has a second inner surface that abuts against the second outer surface opposite to the first protrusion, The first and second protrusions are fitted into the interlocking recess in an interference fit state. The magnetic pole rotor according to claim 12.

14. The end ring mating portion includes an end ring inclined surface which is one end face in the circumferential direction and is inclined with respect to the axial direction. The connecting ring fitting portion includes a connecting ring inclined surface facing the end ring inclined surface, A magnetic pole rotor according to any one of claims 1 to 3.

15. The inclined surface of the end ring is inclined such that the acute angle with respect to the axial direction is 10 degrees or less. The magnetic pole rotor according to claim 14.

16. The flange further includes a flange body portion having an outer peripheral surface extending in the circumferential direction, The connecting ring portion is provided on the outer circumferential surface of the flange body portion, The aforementioned connecting ring fitting portion is The end ring mating portion has opposing surfaces that face each other in the circumferential direction and extend along the radial direction of the magnetic gear electromachine, A connecting inclined surface is connected to the radial inner end of the opposing surface and to the outer circumferential surface, and is inclined with respect to the radial direction. Having, A magnetic pole rotor according to any one of claims 1 to 3.

17. A separate end ring connected to the other end of the annular unit, A separate flange including a separate connecting ring portion that connects to the separate end ring from the other side, Equipped with, The aforementioned end ring has an end ring end face that faces the other side and extends in the circumferential direction, The aforementioned separate connecting ring portion has a connecting ring end face that is in contact with the end face of the end ring, A magnetic pole rotor according to any one of claims 1 to 3.

18. A separate end ring connected to the other end of the annular unit, A separate flange including a separate connecting ring portion that connects to the separate end ring from the other side, Equipped with, The aforementioned separate end ring includes a separate end ring mating portion which is convex on the other side in the axial direction or concave on one side. The aforementioned separate connecting ring portion includes a separate connecting ring fitting portion that fits into the aforementioned separate end ring fitting portion. A magnetic pole rotor according to any one of claims 1 to 3.

19. A magnetic pole rotor according to any one of claims 1 to 3, The stator includes the annular unit and stator coils arranged radially, A magnetic rotor including a rotor magnet, which is positioned on the opposite side of the stator coil from the annular unit, A magnetic gear electromachine equipped with [a specific feature].

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