JP2024044295A - Pole piece rotor and magnetic gear electric machine - Google Patents

Abstract

[Problem] To provide a pole piece rotor and a magnetic gear electric machine capable of suppressing a decrease in torque transmission efficiency. [Solution] The pole piece rotor is a pole piece rotor provided in a magnetic gear electric machine, and includes an annular unit including a plurality of pole pieces and a plurality of non-magnetic bodies arranged alternately in the circumferential direction of the magnetic gear electric machine, an end ring connected to an end of the annular unit on one side in the axial direction of the magnetic gear electric machine, and a flange including a connecting ring portion connected to the end ring from one side, the end ring including an end ring mating portion that is convex on one side in the axial direction or concave on the other side, and the connecting ring portion including a connecting ring mating portion that fits into the end ring mating portion. [Selected Figure] Figure 4A

Description

This disclosure relates to pole piece rotors and magnetic gear electric machines.

The magnetic gear electric machine illustrated in Patent Document 1 includes, in order from the outside in the radial direction, a stator, a pole piece rotor (external rotor), and a magnet rotor (internal rotor). The pole piece rotor includes a pole piece extending in the axial direction and a flange connected to one end of the pole piece. As the magnetic gear electric machine operates, torque is transmitted between the flange and the pole piece. In the same document, one end face of the pole piece faces the axial direction of the magnetic gear electric machine, and the flange is in surface contact with this end face.

Special Publication No. 2009-535012

In the magnetic gear electric machine described above, the flange is in surface contact with one end surface of the magnetic pole piece, so when torque is transmitted between the magnetic pole piece and the flange, the magnetic pole piece and the flange slip against each other in the circumferential direction. There is a risk. Therefore, the torque transmission efficiency may be reduced.

The objective of this disclosure is to provide a pole piece rotor and a magnetic gear electric machine that can suppress a decrease in torque transmission efficiency.

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

A magnetic gear electric machine according to at least one embodiment of the present disclosure includes:
A magnetic pole piece rotor according to any one of claims 1 to 18,
a stator including a stator coil radially aligned with the annular unit;
a magnet rotor including a rotor magnet disposed on the opposite side of the stator coil with the annular unit in between;
Equipped with

According to the present disclosure, it is possible to provide a magnetic pole piece rotor and a magnetic gear electric machine that can suppress a decrease in torque transmission efficiency.

FIG. 1 is a schematic diagram of a magnetic gear electric machine (magnetic geared generator) according to one embodiment. FIG. 3 is a schematic diagram of a magnetic gear electric machine (magnetic geared motor) according to another embodiment. 1 is a schematic diagram showing the general internal structure of a magnetic gear electric machine; 1 is a schematic perspective view of a pole piece rotor according to one embodiment. FIG. FIG. 2 is a schematic diagram showing a mating structure of an end ring and a connecting ring portion according to an embodiment. FIG. 7 is a schematic diagram showing a mating structure of an end ring and a connecting ring portion according to another embodiment. 13 is a schematic diagram showing another fitting structure between an end ring and a connecting ring portion according to another embodiment. FIG. FIG. 7 is a schematic diagram showing an additional example of the mating structure of the end ring and the connecting ring portion according to one embodiment. FIG. 2 is a conceptual perspective view showing a flange according to an embodiment. FIG. 13 is a schematic diagram showing another end ring and another flange according to an embodiment. FIG. 13 is a schematic view showing another end ring and another flange according to another embodiment.

Hereinafter, some embodiments of the present disclosure will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described as embodiments or shown in the drawings are not intended to limit the scope of the present disclosure, and are merely illustrative examples. do not have.
For example, expressions expressing relative or absolute positioning such as "in a certain direction,""along a certain direction,""parallel,""orthogonal,""centered,""concentric," or "coaxial" are strictly In addition to representing such an arrangement, it also represents a state in which they are relatively displaced with a tolerance or an angle or distance that allows the same function to be obtained.
For example, expressions such as "same,""equal," and "homogeneous" that indicate that things are in an equal state do not only mean that things are exactly equal, but also have tolerances or differences in the degree to which the same function can be obtained. It also represents the existing state.
For example, expressions expressing shapes such as squares and cylinders do not only refer to shapes such as squares and cylinders in a strict geometric sense, but also include uneven parts and chamfers to the extent that the same effect can be obtained. Shapes including parts, etc. shall also be expressed.
On the other hand, the expressions "comprising,""including," or "having" one component are not exclusive expressions that exclude the presence of other components.
Note that similar configurations may be given the same reference numerals and explanations may be omitted.

1. Overview of magnetic gear electric machine 1
1A and 1B are schematic diagrams 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 based on the axis of the magnetic gear electric machine 1, and the "circumferential direction" is a circumferential direction based on the axis of the magnetic gear electric machine 1. The magnetic gear electric machine 1 has a rotation shaft A for transmitting power between an external rotating device described later, and the axis of the rotation shaft A coincides with the axis of the magnetic gear electric machine 1. The rotation shaft A is rotatably supported by a housing 98 installed on a base 101. The rotation shaft A in this example includes rotation shafts A1 and A2 that are coaxial with each other, but the present disclosure is not limited thereto, and the rotation shaft A may be a single shaft.

1A and 1B, the magnetic gear electric machine 1 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 supporting the plurality of rotor magnets 19. The rotor yoke 15 is supported by a rotation axis A2, and the magnet rotor 10 is configured to rotate integrally with the rotation axis A2. In the figure, a surface permanent magnet (SPM) configuration in which the plurality of rotor magnets 19 are provided on the surface of the rotor yoke 15 is adopted, but the present disclosure is not limited to this. For example, an interior permanent magnet (IPM) configuration in which the 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 wound around the stator yoke 25 as a stator coil. The stator 20 in the figure employs an SPM type configuration, but the present disclosure is not limited to this, and an IPM type configuration may also be employed.

The magnetic gear electric machine 1 of FIG. 1A and FIG. 1B further includes a pole piece rotor 30. The pole piece rotor 30 includes a plurality of pole pieces 55 arranged in the circumferential direction between the stator 20 and the pole piece rotor 30, a flange 41 arranged on one side of the plurality of pole pieces 55 in the axial direction, and another flange 44 arranged 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 another 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.

The magnetic gear electric machine 1A(1) illustrated in FIG. 1A is a magnetic geared generator 2 configured to be driven by an input from a prime mover 9, which is an example of an external rotating device, to generate electricity. The coil 99 of the magnetic geared generator 2 is electrically connected to the power supply destination 4, which may be a power grid. The principle by which the magnetic geared generator 2 generates electricity is as follows. When the prime mover 9 connected to the rotating shaft A1 functioning as an input shaft is driven, torque is input from the rotating shaft A1 to the flange 41, and the pole piece rotor 30 rotates. The relative positional relationship of the plurality of magnetic pole pieces 55 with respect to the plurality of rotor magnets 19 and the plurality of stator magnets 29 changes, the magnetic flux between the magnet rotor 10 and the stator 20 is modulated, and the magnetic flux is removed from the modulated magnetic field. The rotor magnet 19 receives magnetic force, and the magnet rotor 10 rotates (rotary shaft A2 serving as an output shaft rotates together with the magnet rotor 10). At this time, a current is generated in the coil 99 due to electromagnetic induction caused by the rotation of the pole piece rotor 30 and the magnet rotor 10, and the magnetic geared generator 2 can supply power to the power supply destination 4. Note that when the magnetic geared generator 2 is in operation, the prime mover 9 can rotate the rotating shaft A1 in any circumferential direction.

The magnetic gear electric machine 1B (1) illustrated in FIG. 1B is a magnetic geared motor 3 configured to receive power P from a power supply source 6, which may be, for example, a power system, and drive a rotating machine 8, which is an example of an external rotating device. The rotating machine 8 may be, for example, an electric vehicle driven by the magnetic geared motor 3. In this case, the rotating shaft A (rotating shaft A1) of the magnetic geared motor 3 may be connected to a 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 magnet rotor 10 rotates together with the rotating shaft A2 due to a rotating magnetic field generated by energizing the coil 99. The relative positional relationship of the multiple pole pieces 55 with respect to the multiple rotor magnets 19 and the multiple stator magnets 29 changes, and the magnetic flux between the magnet rotor 10 and the stator 20 is modulated, causing the pole piece rotor 30 to rotate, and torque is output from the flange 41 to the rotating shaft A1 as an output shaft. As a result, torque is transmitted from the rotating shaft A1 to the rotating machine 8, and the rotating machine 8 is driven by the magnetic geared motor 3. When the magnetic geared motor 3 is operating, the rotating shaft A1 may rotate in either circumferential direction. The direction of rotation is determined by controlling the current supply to the coil 99.

In the magnetic gear electric machine 1A, 1B (1) of FIG. 1A and FIG. 1B, if the number of magnetic poles of the magnetic pole piece 55 of the magnetic pole piece rotor 30 is NL, the number of magnetic pole pairs (number of pole pairs) of the rotor magnet 19 of the magnet rotor 10 is NH, and the number of magnetic pole pairs (number of pole pairs) of the stator magnet 29 of the stator 20 is NS, then NL = NH + NS is established. When this relational expression is established, the ratio of the rotation speed of the magnet rotor 10 to the magnetic pole piece rotor 30 is expressed as NL/NH. In this example, NL/NH is greater than 1, and 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 piece 55 is less than the number of pole pairs NS of the stator magnet 29.

In the examples of FIGS. 1A and 1B, a prime mover 9 and a rotating machine 8 as external rotating devices are connected to the rotating shaft A1, but the present disclosure is not limited thereto, and the external rotating device may be connected to the rotating shaft A2. good. In this case, the rotating shaft A2 may be connected to the separate flange 44, and the rotating shaft A1 may be connected to the flange 41 via a bearing. Thereby, torque is transmitted between the pole piece rotor 30 and the rotating shaft A2 via the separate flange 44. Further, the rotation axis A may be a single axis. In this case, the rotating shaft A is provided so as to pass through the housing 98 in the axial direction, the flange 41 and the separate flange 44 are connected to the rotating shaft A, and the rotor yoke 15 of the magnet rotor 10 has a bearing. It is connected to the rotating shaft A via the rotary shaft A. In this embodiment, the external rotating device can be connected to one end in the axial direction of the rotating shaft A, and the external rotating device can be connected to the other end, The usability of the magnetic gear electric machine 1 is improved.

<2. Overview of internal structure of magnetic gear electric machine 1>
FIG. 2 is a schematic diagram showing the internal structure of the magnetic gear electric machine 1 according to an embodiment of the present disclosure. In FIG. 2, which is a schematic diagram, the circumferential direction is shown to coincide with the left-right direction on the paper surface. The magnetic pole piece rotor 30 includes an annular unit 50 including a plurality of magnetic pole pieces 55 and a plurality of non-magnetic bodies 52 (see also FIG. 3). Each magnetic pole piece 55 and each nonmagnetic body 52 both extend in the axial direction. Further, the plurality of magnetic pole pieces 55 and the plurality of nonmagnetic bodies 52 are arranged alternately in the circumferential direction. Each magnetic pole piece 55 is formed of magnetic steel sheets laminated 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. The annular unit 50 according to the example of FIG. 2 faces the rotor yoke 15 with a first gap G1, and faces the plurality of stator magnets 29 with a second gap G2.

Note that in some embodiments of the present disclosure, part or all of the outer peripheral surface of the annular unit 50 may be covered with a cover (not shown). Similarly, part or all of the inner peripheral surface of the annular unit 50 may also be covered with a cover (not shown). The material forming the cover is preferably a non-magnetic material, more preferably a non-magnetic and non-conductive material.

3. Overall configuration of pole piece rotor 30
FIG. 3 is a schematic perspective view of a pole piece rotor 30 according to an embodiment of the present disclosure. As described above, the pole piece rotor 30 includes an annular unit 50. In the example shown in the figure, the non-magnetic body 52 is longer in the axial direction than the pole piece 55. The pole piece rotor 30 further includes an end ring 31 connected to an 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 body 52, and in the example shown in the figure, an accommodating recess 331 is formed in the end ring 31 to accommodate one end of the non-magnetic body 52. The accommodating recess 331 is recessed to one side from an end face 335 on the other side 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.

The pole piece rotor 30 further includes a flange 41 . The flange 41 is connected to a connecting ring portion 42 connected to the end ring 31 from one side, a plurality of struts 47 extending radially inward from the connecting ring portion 42, and an inner end of each of the plurality of struts 47. and a shaft connecting portion 48. The plurality of struts 47 are arranged at equal intervals in the circumferential direction. The shaft connecting portion 48 has a cylindrical shape along the axial direction, and the inner circumferential surface of the shaft connecting portion 48 is connected to the rotating shaft A1.
Note that the structure of the flange 41 shown in FIG. 3 is only an example of the present disclosure. For example, the flange 41 does not need to include the plurality of struts 47. In this case, the inner peripheral surface of the connecting ring portion 42 may be directly connected to the outer peripheral surface of the shaft connecting portion 48. Such a configuration can be realized by making the radial length of the connecting ring portion 42 longer than the radial length shown in FIG. 3 .

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

4. Examples of fitting structure between end ring 31 and connecting ring portion 42
4A and 4B are schematic diagrams showing the mating 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 FIGS. 5, 8A, and 8B).

The end rings 31A, 31B (31) in Figures 4A and 4B include end ring mating portions 70A, 70B (70) that are convex on one side in the axial direction or concave on the other side, and the connecting ring portions 42A, 42B (42) include connecting ring mating portions 80A, 80B (80) that fit into the end ring mating portions 70A, 70B. By adopting such a mating structure, the end face in the circumferential direction of the end ring mating portion 70 and the end face in the circumferential direction of the connecting ring mating portion 80 can contact each other. Therefore, in an embodiment in which torque is input and output at the flange 41, the end ring mating portion 70 can urge the connecting ring mating portion 80 in the circumferential direction with sufficient force, or the connecting ring mating portion 80 can urge the end ring mating portion 70 in the circumferential direction with sufficient force. As a result, when the pole piece rotor 30 rotates, slippage between the end ring mating portion 70 and the connecting ring mating portion 80 can be suppressed. The mating between the end ring mating portion 70 and the connecting ring mating portion 80 can be a tight fit, an intermediate fit, or a clearance fit, but it is preferable to use a tight fit or an intermediate fit.

In FIG. 4A, the end ring fitting portion 70A has at least one end ring convex portion 71 that is convex on one side in the axial direction, and the connecting ring fitting portion 80A has at least one end ring convex portion 71 fitted therein. It has at least one coupling ring recess 82 . In the figure, a plurality of engagements between the end ring convex portion 71 and the connecting ring concave portion 82 are formed along the circumferential direction. As a more specific example, the plurality of end ring convex parts 71 and the plurality of connecting ring concave parts 82 are arranged at equal intervals in the circumferential direction (dimension MA in FIG. 4A indicates the arrangement interval). In this case, the numbers of the end ring convex portions 71 and the connecting ring concave portions 82 may be the same.

In FIG. 4B, the end ring mating portion 70B has at least one end ring recess 72 that is recessed toward 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 protruding toward 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 (the dimension MB in FIG. 4B indicates the arrangement interval). In this case, the number of end ring recesses 72 and the number of connecting ring recesses 82 may be the same.

The end ring mating portion 70 and the connecting ring mating portion 80 are not limited to the structure shown in FIG. 4A and FIG. 4B. Although detailed illustration is omitted, the end ring mating portion 70 may have at least one end ring protrusion 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 protrusion 81. The number of end ring protrusions 71 and end ring recesses 72 may be one. Even in this case, the end ring protrusion 71 and the connecting ring recess 82 are mated, and the end ring recess 72 and the connecting ring protrusion 81 are mated, so it is understood that the end ring mating portion 70 and the connecting ring mating portion 80 are mated in multiple places.

With 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. This realizes a pole piece rotor 30 that can suppress a decrease in torque transmission efficiency.

In the example of FIGS. 4A and 4B, the end ring mating portion 70 is fitted into the connecting ring mating portion 80 in an interference fit state. More specifically, the end ring convex portion 71 in FIG. 4A is fitted into the connecting ring recess 82 in a tight fit, and the end ring recess 72 in FIG. 4B is fitted in the connecting ring convex portion 81 in a tight fit. According to the above configuration, since the slippage between the end ring engaging portion 70 and the connecting ring engaging portion 80 is further suppressed, the magnetic pole piece rotor 30 can further suppress a decrease in torque transmission efficiency.
Furthermore, in the examples shown in FIGS. 4A and 4B, a plurality of engagements between the end ring engagement portion 70 and the connection ring engagement portion 80 are formed along the circumferential direction. According to the above configuration, the locations where torque is transmitted between the end ring fitting portion 70 and the connecting ring fitting portion 80 are dispersed, so that damage to at least one of the end ring 31 or the connecting ring portion 42 is prevented. It can be suppressed.
Furthermore, in the example shown in the figure, the end ring engaging portions 70 and the connecting ring engaging portions 80 are formed at equal intervals along the circumferential direction (see dimensions MA and MB in FIGS. 4A and 4B). According to the above configuration, when torque is transmitted between the end ring fitting part 70 and the connecting ring fitting part 80, the force acting on the end ring 31 and the connecting ring part 42 is uniformly distributed in the circumferential direction. can be dispersed into
Note that the number of the end ring fitting portions 70 and the connecting ring fitting portions 80 may be eight, for example. For example, eight end ring convex parts 71 and eight connecting ring concave parts 82 may be arranged at equal intervals in the circumferential direction (see FIG. 4A), or eight connecting ring convex parts 81 and eight end ring concave parts 82 may be arranged at equal intervals in the circumferential direction (see FIG. 4A). The ring recesses 72 may be arranged at equal intervals in the circumferential direction (see FIG. 4B).

Returning to FIG. 4B, the end ring 31B (31) includes an accommodation recess 331 that accommodates the end of the non-magnetic body 52, as described above. In the example shown in the figure, the accommodation recess 331 has a concave bottom surface 332 facing the other axial side and a pair of concave side surfaces 333 protruding from the concave bottom surface 332 to the other axial side. The end ring recess 72 also has a concave bottom surface 722 facing one axial side and a pair of concave side surfaces 723 protruding from the concave bottom surface 722 to one axial side. In the present disclosure, at least a portion of the accommodation recess 331 is circumferentially offset with respect to at least one end ring recess 72. More specifically, at least a portion of the accommodation recess 331 is circumferentially offset with respect to each of the multiple end ring recesses 72. In the example shown in the figure, only one concave side surface 333 of the accommodating recess 331 is positioned so as to be aligned in the axial direction with one concave side surface 723 of one of the end ring recesses 72, and the remaining portion of the accommodating recess 331 is shifted in the circumferential direction relative to this end ring recess 72.

When the pole piece rotor 30 rotates, torque is transmitted between the nonmagnetic body 52 and the housing recess 331. In order to avoid damage to at least one of the accommodation recess 331 and the non-magnetic material 52, the accommodation recess 331 and the non-magnetic material 52 can be avoided by making the accommodation recess 331 deeper (in other words, by lengthening the concave side surface 333 in the axial direction). It is preferable to increase the contact area with. This is because the force acting on the housing recess 331 and the non-magnetic material 52 can be dispersed. On the other hand, the deeper the accommodation recess 331 is, the shorter the specific portion of the end ring 31 becomes in the axial direction. More specifically, a portion of the end ring 31 located on one side in the axial direction of the accommodation recess 331 (the portion is indicated by the symbol H in FIG. 4B) is shortened 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, at least a part of the accommodation recess 331 is shifted in the circumferential direction with respect to at least one end ring 31 recess, so even if the accommodation recess 331 is deepened, the end ring 31 is The axial length of the portion indicated by H is prevented from becoming extremely short. Therefore, since the depth of the housing recess 331 can be ensured sufficiently, damage to at least one of the housing recess 331 or the non-magnetic material 52 can be avoided.

The end ring 31B (31) illustrated in FIG. 4B further includes an end ring defining convex portion 317 that is convex on the other side in the axial direction. The end ring defining convex portion 317 is aligned with one of the magnetic pole pieces 55 in the axial direction. In the example shown in the figure, a plurality of end ring convex portions 71 are each aligned with a plurality of magnetic pole pieces 55 in the axial direction. Further, the circumferential length of the end ring defining convex portion 317 is the same as the circumferential length of the magnetic pole piece 55. At least a portion of the end ring defining convex portion 317 is aligned with the end ring concave portion 72 in the axial direction. In the example shown in the figure, the end ring defining convex portion 317 and the end ring concave portion 72 are aligned in the circumferential direction, and the circumferential range in which the end ring defining convex portion 317 is arranged is the circumferential range in which the end ring concave portion 72 is disposed. Included in the direction range. According to the above configuration, the part of the end ring 31 located on the other side in the axial direction than the end ring recess 72 (the part is indicated by the symbol J in FIG. 4B) is utilized for the end ring convex part 71. , it is possible to suppress the part from becoming short in the axial direction. Therefore, the mechanical strength of the end ring 31 can be ensured.
In addition, when the circumferential length of the end ring defining convex portion 317 and the circumferential length of the magnetic pole piece 55 are different, the length of the non-magnetic body 52 adjacent to the magnetic pole piece 55 is determined according to the deviation of the circumferential length between the two. It is necessary to form irregularities on the end face in the circumferential direction. In this case, stress concentration may occur in the non-magnetic body 52 when torque is transmitted between the magnetic pole piece 55 and the non-magnetic body 52. In this regard, in an embodiment of the present disclosure, since the circumferential length of the end ring defining convex portion 317 is the same as the circumferential length of the magnetic pole piece 55, unevenness is not required on the circumferential end surface of the non-magnetic body 52. , it becomes possible to ensure the mechanical strength of the non-magnetic material 52.

As illustrated in FIG. 4B, the depth of the accommodation recess 331 (i.e., the axial length of the pair of concave side surfaces 333) is equal to the depth of the end ring recess 72 (i.e., the axial length of the pair of concave side surfaces 723). deeper than The depth of the accommodation recess 331 is, for example, 100% or more and 500% or less of the depth of the end ring recess 72. According to the above configuration, by making the accommodation recess 331 deep, the force acting on the accommodation recess 331 and the nonmagnetic material 52 can be further dispersed. Thereby, damage to at least one of the housing recess 331 and the non-magnetic material 52 can be further avoided.

The connecting ring portion 42B (42) illustrated in FIG. 4B includes a regulation hole 45 that defines a space S1 formed between any two circumferentially adjacent connecting ring convex portions 81. Both ends of the regulation hole portion 45 are defined by the end faces of adjacent connecting ring convex portions 81 in the circumferential direction. The end ring 31B (31) further includes an insertion portion 38 disposed inside the defined hole portion 45. The insertion portion 38 has a shape that is convex toward one side in the axial direction. Therefore, it is understood that the portion of the end ring 31 located on the other side of the insertion portion 38 in the axial direction (this portion is indicated by the symbol K in FIG. 4B) is a relatively long portion in the axial direction. In the example shown in the figure, the circumferential length (dimension NA) of the insertion portion 38 is longer than the circumferential length (dimension NB) of each coupling ring convex portion 81. In the example shown in the figure, the circumferential length of the insertion portion 38 is 100% or more and 400% or less of the circumferential length of the connecting ring convex portion 81. According to the above configuration, the length of the insertion portion 38 in the circumferential direction can be increased, so that a large portion of the end ring 31 that is long in the axial direction can be secured. Thereby, the mechanical strength of the end ring 31 can be improved.

Returning to FIG. 4A, at least one of the plurality of nonmagnetic bodies 52 includes a nonmagnetic body hole 59 open in the axial direction. In the example shown in the figure, each of the plurality of nonmagnetic materials 52 includes a plurality of nonmagnetic material holes 59 . Further, the end ring 31A (31) includes a first end ring hole 311 that is open in the axial direction, and the connecting ring portion 42A (42) includes a first connecting ring hole 411 that is open in the axial direction. 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 hole 59, the first end ring hole 311, and the first connecting ring hole 411 communicate with each other and form an air ventilation path. When the pole piece rotor 30 is rotating, air can flow through this ventilation passage in the axial direction, and the pole piece rotor 30 can be cooled. The air may also cool the components of the magnetic gear electric machine 1 in the vicinity of the pole piece rotor 30.

In the example of FIG. 4A, each of the plurality of nonmagnetic bodies 52 includes a nonmagnetic hole 59, and the same number of first end ring holes 311 and first connecting ring holes 411 as the number of nonmagnetic holes 59. and is provided. Therefore, the plurality of first end ring holes 311 each face the plurality of non-magnetic holes 59, and the plurality of first connecting ring holes 411 respectively face the plurality of first end ring holes 311. ing. The first end ring hole 311 of the end ring 31A is disposed at a position shifted in the circumferential direction from the end ring engaging portion 70A (end ring convex portion 71), and the first connecting ring hole 411 of the connecting ring portion 42A is , is arranged at a position shifted in the circumferential direction from the connecting ring fitting portion 80A (connecting ring recess 82). In addition, the non-magnetic material hole part 59, the 1st end ring hole part 311, and the 1st connection ring hole part 411 illustrated in FIG. 4A are also applied to the structure illustrated in FIG. 4B. A detailed explanation is omitted to avoid duplication of explanation.

With the above configuration, the non-magnetic hole 59, the first end ring hole 311, and the first connecting ring hole 411 can form an air ventilation path. Therefore, the temperature rise of the pole piece rotor 30 can be suppressed.

In some embodiments, a shaft member may be inserted into the non-magnetic hole 59, the first end ring hole 311, and the first connecting ring hole 411. Fig. 5 is a schematic diagram showing an engagement structure of an end ring 31C (31) and a connecting ring portion 42C (42) according to another embodiment. In Fig. 5 as well, the multiple non-magnetic bodies 52 each include multiple non-magnetic hole portions 59, the end ring 31C (31) includes multiple first end ring holes 311, and the connecting ring portion 42C (42) includes multiple first connecting ring holes 411.
In the example shown in the figure, fastening shafts 88 are provided to be 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.

According to the above configuration, since 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, the rigidity of the pole piece rotor 30 can be increased. At the same time, it is possible to realize an anti-vibration design in the pole piece rotor 30.

Although not an essential component of the present disclosure, at least one of the plurality of magnetic pole pieces 55 may include a magnetic pole piece hole 56 that is open in the axial direction, as illustrated in FIG. Furthermore, the end ring 31C (31) may include a second end ring hole 322 that is open in the axial direction, and the connecting ring portion 42C (42) may include a second connecting ring hole that is open in the axial direction. 422 may also be included. 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 . That is, the magnetic pole piece hole 56, the second end ring hole 322, and the second connecting ring hole 422 communicate with each other and form an air ventilation path. When the pole piece rotor 30 is rotating, air can flow through this ventilation passage in the axial direction, and the pole piece rotor 30 can be cooled. The air may also cool the components of the magnetic gear electric machine 1 in the vicinity of the pole piece rotor 30. The magnetic pole piece hole 56, the second end ring hole 322, and the second connection ring hole 422 may or may not be applied to the configuration illustrated in FIGS. 4A and 4B.

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 ventilation path. Therefore, the temperature rise of the pole piece rotor 30 can be suppressed.

<5. Other examples of the mating structure of the end ring 31 and the connecting ring portion 42>
As illustrated in FIG. 5, the connecting ring engagement portion 80C (80) of the connecting ring portion 42C (42) includes a first convex portion 181 and a second convex portion 182. The first convex portion 181 and the second convex portion 182 are convex toward the other side in the axial direction, and are adjacent to each other with an interval in the circumferential direction. The end surface of the first convex portion 181 opposite to the second convex portion 182 is a first outer surface 191 , and the end surface on the second convex portion 182 side is a first defining surface 193 . The end surface of the second convex portion 182 on the opposite side to the first convex portion 181 is a second outer surface 192 , and the end surface on the first convex portion 181 side is a second defining surface 194 . Furthermore, the connecting ring fitting portion 80C further includes an intermediate hole portion 185 that defines a space S2 formed between the first convex portion 181 and the second convex portion 182. Both circumferential ends of the intermediate hole portion 185 are constituted by a first defining surface 193 of the first convex portion 181 and a second defining surface 194 of the second convex portion 182 . Further, the end ring fitting portion 70C (70) of the end ring 31C (31) includes a fitting recess 175 into which the first convex portion 181 and the second convex portion 182 fit. The mating recess 175 has a bottom surface 177 facing one side in the axial direction, and an intermediate convex portion 176 projecting from the bottom surface 177 toward one side. The intermediate convex portion 176 of this embodiment is fitted into the intermediate hole portion 185 in a clearance fit state.

According to the above configuration, the first convex portion 181 and the second convex portion 182 are fitted into the fitting recess 175, so there is no need to strictly control the dimensional tolerances of the first defining surface 193, which is one end of the first convex portion 181 in the circumferential direction, and the second defining surface 194, which is the other end of the second convex portion 182 in the circumferential direction, and therefore the structure of the pole piece rotor 30 can be simplified. In addition, in the assembly process of the connecting ring fitting portion 80 and the end ring 31, the intermediate convex portion 176 and the fitting recess 175, which are fitted into each other in a clearance fit, perform a guiding function when the first convex portion 181 and the second convex portion 182 fit into the fitting recess 175, so the assembly process of the pole piece rotor 30 can be facilitated. It should be noted that even if 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.

In some embodiments, the mating 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 fitted into the mating recess 175 in a tight 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.

According to the above configuration, the portions of the mating recess 175 that positively contact the first convex portion 181 or the second convex portion 182 are the first inner surface 171 and the second inner surface 172. Therefore, when the pole piece 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 pole piece 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 portion on which the force acts among the end ring mating portion 70 and the mating recess 175 changes depending on the rotation direction of the pole piece 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 when the portion on which the force acts is the same regardless of the rotation direction.

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

<6. Additional Examples of the Joint Structure Between the End Ring 31 and the Connection Ring Portion 42>
As illustrated in FIG. 6, the end ring 31D (31) includes an end ring mating portion 70D (70), which includes an end ring recess 72D (72) recessed toward the other axial side. One end face and the other end face in the circumferential direction of the end ring recess 72 are end ring inclined surfaces 77 inclined with respect to the axial direction. The connecting ring portion 42D (42) includes a connecting ring mating portion 80D (80), which includes a connecting ring protrusion 81D (81) that fits into the end ring recess 72. The connecting ring protrusion 81D includes a pair of connecting ring inclined surfaces 87. The pair of connecting ring inclined surfaces 87 face the pair of end ring inclined surfaces 77, respectively. The connecting ring inclined surfaces 87 are parallel to the end ring inclined surfaces 77.

According to the above configuration, in the process of fitting the end ring fitting part 70 to the connecting ring fitting part 80, the end ring inclined surface 77 and the connecting ring inclined surface 87 perform a fitting guiding function. Therefore, the process of assembling the pole piece rotor 30 can be facilitated.

It is noted that one of the pair of end ring inclined surfaces 77 may not be provided. For example, one circumferential end face of the end ring recess 72 may be parallel to the axial direction. In this case, one of the pair of connecting ring inclined surfaces 87 may not be provided. Furthermore, the end ring mating portion 70D may include an end ring protrusion 71 (see FIG. 4A) instead of the end ring recess 72D, and the end ring inclined surface 77 may be formed on one circumferential end face of the end ring protrusion 71. In this case, the connecting ring mating portion 80 may include a connecting ring recess 82 instead of the connecting ring protrusion 81, and the connecting ring inclined surface 87 may be formed on one circumferential end face of the connecting ring recess 82. In any embodiment, the above advantages can be obtained.

In some embodiments, the end ring inclined surface 77 is inclined so that an acute angle (see angle θ in FIG. 6) with respect to the axial direction is greater than 0 degrees and less than or equal to 10 degrees. Similarly, the connecting ring inclined surface 87 is inclined so that the acute angle with respect to the axial direction is greater than 0 degrees and less than 10 degrees. According to the above configuration, since it is possible to suppress the inclination of the end ring inclined surface 77 and the connecting ring inclined surface 87 with respect to the axial direction, when torque is transmitted between the end ring 31D and the connecting ring portion 42D, It is possible to suppress the ring 31D and the connecting ring portion 42D from shifting from each other in the axial direction.

FIG. 7 is a conceptual perspective view showing a flange 41A (41) according to an embodiment of the present disclosure. The flange 41A (41) includes a flange main body portion 450 having an outer circumferential surface 452 extending in the circumferential direction. The flange main body 450 has a ring shape when viewed in the axial direction, and the outer circumferential surface 452 extends over the entire circumference of the flange main body 450. Note that the above-mentioned struts 47 (see FIG. 3) extend radially inward from the inner circumferential surface of the flange main body portion 450.

The connecting ring portion 42E (42) provided on the outer peripheral surface 452 includes a connecting ring engaging portion 80E (80), and the connecting ring engaging portion 80E includes a connecting ring convex portion 81E (81). As described above, the connecting ring convex portion 81E (81) fits into the end ring concave portion 72 (see FIG. 4A). The connecting ring convex portion 81E is connected to an opposing surface 457 that faces the end ring recess 72 in the circumferential direction and extends along the radial direction, and to the radially inner end of the opposing surface 457 and the outer peripheral surface 452. It has a connecting slope 459. The connecting inclined surface 459 is inclined with respect to the radial direction, and in the example shown in the figure, extends in a curved manner with respect to the radial direction. The connecting inclined surface 459 according to another embodiment may be inclined with respect to the radial direction and extend linearly. In the example of FIG. 7, the opposing surface 457 and the connecting slope 459 are formed at both circumferential ends of the connecting ring convex portion 81E, but instead of this, only one circumferential end of the connecting ring convex portion 81E is formed. A facing surface 457 and a connecting inclined surface 459 may be formed on the surface. Further, although detailed illustrations are omitted, the connecting ring fitting portion 80E may include a connecting ring recess 82 (see FIG. 4B), and at least one circumferential end of the connecting ring recess 82 has an opposing surface 457 and a connecting slope 459. may be formed.

According to the above configuration, by providing the connecting inclined surface 459, when torque is transmitted between the connecting ring engaging portion 80 and the end ring engaging portion 70, the radially inner end of the opposing surface 457 Stress concentration can be suppressed. Thereby, damage to the connecting ring portion 42E (42) can be avoided.

7. Details of the Structure of the Separate End Ring 34 and Separate Flange 44
FIG. 8A shows an alternative end ring 34A (34) and an alternative flange 44A (44) according to one embodiment of the present disclosure, and FIG. 8B shows an alternative end ring 34B (34) and an alternative flange 44B (44) according to another embodiment of the present disclosure.

In the example of FIG. 8A, the separate end ring 34A and the separate flange 44A do not have a mating structure like the end ring 31 and the connecting ring portion 42. That is, the separate end ring 34A has an end ring end surface 134A (134) facing the other side in the axial direction and extending in the circumferential direction. The end ring end surface 134A is a flat surface extending 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) facing the end ring end face 134A. The connecting ring end surface 149A is also a flat surface extending over the entire circumference of the separate flange 44A. In an embodiment in which a separate end ring 34A and a separate flange 44A are employed, it is preferable that one axial side of the rotating shaft A (rotating shaft A1 in the examples of FIGS. 1A and 1B) is connected to an external rotating device. This prevents active torque transmission between the separate end ring 34A and the separate flange 44A.

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

In the example of FIG. 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 part 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 ventilation path. In addition, the separate end ring 34A (34) may include a fourth end ring hole 134 that faces the pole piece hole 56 of the pole piece 55 and is open in the axial direction, and the separate connecting ring part 49A (49) may include a fourth connecting ring hole 244 that faces the fourth end ring hole 134 and is open in the axial direction. With this configuration, the pole piece hole 56, the fourth end ring hole 134, and the fourth connecting ring hole 244 may form an air passage. In some embodiments, the fastener shaft 88 (see FIG. 5) inserted into the non-magnetic hole 59 may be inserted into the third end ring hole 133 and the third connecting ring hole 243.

In the example of FIG. 8B, an interlocking structure like the end ring 31 and the connecting ring portion 42 is adopted for the separate end ring 34B and the separate flange 44B. That is, the separate end ring 34B includes a separate end ring fitting portion 270 that is convex on the other side or concave on one side in the axial direction, and the separate connecting ring portion 49B (49) is provided with the separate end ring fitting portion 270. It includes a separate connecting ring engagement portion 280 that fits. The separate end ring fitting portion 270 and the separate connecting ring fitting portion 280 may be fitted in an interference fit state, an intermediate fit state, or a clearance fit state. Either method may be used, but it is preferable to adopt tight fit or intermediate fit.

In the example of FIG. 8B, the separate end ring fitting portion 270 has at least one separate end ring convex portion 271 that is convex on one side in the axial direction, and the separate connecting ring fitting portion 280 has at least one separate end ring convex portion 271 that is convex on one side in the axial direction. A separate connecting ring recess 282 that fits into the ring protrusion 271 may be provided. The separate end ring convex portion 271 and the separate connecting ring concave portion 282 may be arranged at equal intervals in the circumferential direction. Further, although detailed illustration is omitted, the separate end ring fitting portion 270 may include at least one separate end ring concave portion that is concave on the other side in the axial direction. In this case, the separate connecting ring engagement portion 280 may include at least one separate connecting ring protrusion that fits into at least one separate end ring recess. The separate connecting ring convex portion is convex on one side in the axial direction. In an embodiment in which a separate end ring 34B and a separate flange 44B are employed, the other axial side of the rotating shaft A (rotating shaft A2 in the examples of FIGS. 1A and 1B) may be connected to an external rotating device.

With the above configuration, the occurrence of slippage can be suppressed regardless of whether torque transmission between the pole piece rotor 30 and an external rotating device is performed via the flange 41 or the separate flange 44.

8. Summary
The contents described in the above-mentioned embodiments can be understood, for example, as follows.

1) A pole piece rotor (30) according to at least one embodiment of the present disclosure comprises:
A pole piece rotor for a magnetic gear electric machine (1), comprising:
an annular unit (50) including a plurality of magnetic pole pieces (55) and a plurality of non-magnetic bodies (52) arranged alternately in a circumferential direction of the magnetic gear electric machine;
an end ring (31) connected to an end of the annular unit on one axial side of the magnetic gear electric machine;
a flange (41) including a connecting ring portion (42) that connects to the end ring from the one side;
Equipped with
The end ring includes an end ring mating portion (70) that 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.

According to the configuration 1) above, the end ring engaging portion and the connecting ring engaging portion can 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. Therefore, a pole piece rotor that can suppress a decrease in torque transmission efficiency is realized.

2) In some embodiments, the pole piece rotor according to 1) above,
The connecting ring fitting portion has at least one connecting ring convex portion (81) that is convex 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 convex portion fits,
The end ring further includes an accommodating recess (331) that is recessed toward the one side in the axial direction and is an accommodating recess for accommodating an end portion on the one side of any of the nonmagnetic materials,
At least a portion of the accommodation recess is offset in the circumferential direction with respect to the at least one end ring recess.

Because torque is transmitted between the non-magnetic body and the accommodating recess, it is preferable to disperse the force acting on the accommodating recess and the non-magnetic body by deepening the accommodating recess in order to avoid damage to at least one of the accommodating recess or the non-magnetic body. On the other hand, the deeper the accommodating recess, the shorter a specific portion 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 portion of the accommodating recess is offset in the circumferential direction relative to at least one end ring recess, so that even if the accommodating recess is deepened, the axial length of the end ring is prevented from becoming extremely short. Therefore, the depth of the accommodating recess can be sufficiently ensured, making it possible to avoid damage to at least one of the accommodating recess or the non-magnetic body.

3) In some embodiments, the pole piece rotor according to 2) above,
The end ring further includes an end ring defining protrusion (317) that is protruding toward the other side and is aligned with any one of the pole pieces in the axial direction,
At least a portion of the end ring defining protrusion is aligned with the end ring recess in the axial direction.

According to configuration 3) above, the portion of the end ring located on the other side of the end ring in the axial direction than the end ring concave portion is utilized as the end ring convex portion, so that it is possible to suppress the portion from becoming shorter in the axial direction. Therefore, the mechanical strength of the end ring can be ensured.

4) In some embodiments, the pole piece rotor according to 2) or 3) above,
The depth of the accommodating recess is greater than the depth of the end ring recess.

According to configuration 4) above, by making the accommodation recess deep, the force acting on the accommodation recess and the nonmagnetic material can be further dispersed. Thereby, damage to at least one of the housing recess or the non-magnetic material can be further avoided.

5) In some embodiments, the pole piece rotor according to any one of 1) to 4) above,
The end ring fitting portion is tightly fitted into the connecting ring fitting portion.

According to the configuration 5) above, since slippage between the end ring engaging portion and the connecting ring engaging portion is further suppressed, the pole piece rotor can further suppress a decrease in torque transmission efficiency.

6) In some embodiments, a pole piece rotor according to any one of 1) to 5) above,
A plurality of engagements between the end ring engagement portions and the connecting ring engagement portions are formed along the circumferential direction.

According to the configuration of 6) above, the locations where torque is transmitted between the end ring mating portion and the connecting ring mating portion are dispersed, so damage to at least one of the end rings or the connecting ring can be suppressed.

7) In some embodiments, the pole piece rotor according to 6) above,
The engagements between the end ring engagement portions and the connecting ring engagement portions are configured to be formed at equal intervals along the circumferential direction.

According to configuration 7) above, when torque is transmitted between the end ring engaging portion and the connecting ring engaging portion, the force acting on the end ring and the connecting ring portion is uniformly distributed in the circumferential direction. Can be dispersed.

8) In some embodiments, the pole piece rotor according to any one of 1) to 7) above,
The connecting ring engagement portion has a plurality of connecting ring convex portions (81) that are convex toward the other side and are spaced apart in the circumferential direction,
The end ring engaging portion has a plurality of end ring recesses (72) into which the plurality of connecting ring convex portions fit, respectively;
The connecting ring portion includes a defined hole portion (45) that defines a space formed between any two circumferentially adjacent connecting ring convex portions,
The end ring further includes an insertion portion (38) disposed inside the defined hole,
The circumferential length of the insertion portion is longer than the circumferential length of each of the connecting ring convex portions.

According to the configuration of 8) above, the circumferential length of the insertion portion can be increased, so that the end ring can have a large axially long portion. This improves the mechanical strength of the end ring.

9) In some embodiments, the pole piece rotor according to any one of 1) to 8) above,
At least one of the plurality of non-magnetic bodies includes a non-magnetic hole (59) open in the axial direction,
The end ring includes a first end ring hole (311) facing the non-magnetic hole and 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.

According to configuration 9) above, the nonmagnetic hole, the first end ring hole, and the first connecting ring hole can form an air ventilation path. Therefore, the temperature rise of the pole piece rotor can be suppressed.

10) In some embodiments, the pole piece rotor according to 9) above,
Each of the plurality of non-magnetic bodies includes the non-magnetic hole,
The end ring further includes a plurality of first end ring holes facing each of the plurality of non-magnetic holes,
The connecting ring portion further includes a plurality of first connecting ring holes facing each of the plurality of first end ring holes,
The apparatus further includes a fastening shaft (88) extending in the axial direction and inserted into the non-magnetic hole, the first end ring hole, and the first connecting ring hole.

According to the configuration of 10) above, the fastening shaft is inserted into the non-magnetic hole portion, the first connecting hole portion, and the first connecting hole portion, so that the rigidity of the pole piece rotor can be increased and a vibration-proof design can be realized in the pole piece rotor.

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

According to configuration 11) above, the magnetic pole piece hole, the second end ring hole, and the second connecting ring hole can form an air ventilation path. Therefore, the temperature rise of the pole piece rotor can be suppressed.

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

According to configuration 12) above, since a configuration is adopted in which the first convex portion and the second convex portion engage with the mating concave portion, one end in the circumferential direction of the first convex portion and the circumference of the second convex portion are adopted. Since there is no need to strictly control the dimensional tolerance at the other end in the direction, the structure of the pole piece rotor can be simplified. In addition, in the assembly process of the connecting ring mating part and the end ring, the intermediate convex part and the mating concave part, which are fitted with each other in a clearance fit state, are used as guides for the first convex part and the second convex part to fit into the mating concave part. Since this function is fulfilled, the assembly process of the pole piece rotor can be facilitated.

13) In some embodiments, the pole piece rotor according to 12) above,
The mating recess is
a first inner surface (171) that comes into contact with a first outer surface (191) of the first convex portion opposite to the second convex portion;
a second inner surface (172) that comes into contact with a second outer surface (192) of the second convex portion opposite to the first convex portion;
The first convex portion and the second convex portion are tightly fitted into the mating recess.

According to the configuration of 13) above, the portions of the mating recess that actively come into contact with the first convex portion or the second convex portion are the first inner surface and the second inner surface. Therefore, when the pole piece 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 pole piece rotor rotates to the opposite side, the other of the first inner surface or the second inner surface actively transmits torque to the connecting ring mating portion. As a result, the portions of the end ring mating portion and the mating recess on which the force acts change depending on the rotation direction of the pole piece rotor. Therefore, the mechanical durability of the end ring mating portion and the connecting ring mating portion can be improved compared to when the portions on which the force acts are the same regardless of the rotation direction.

14) In some embodiments, the pole piece rotor according to any one of 1) to 13) above,
The end ring engaging portion includes an end ring inclined surface (77) that is one end surface in the circumferential direction and is inclined with respect to the axial direction,
The connecting ring engagement portion includes a connecting ring slope (87) opposite to the end ring slope.

According to the configuration of 14) above, in the process of fitting the end ring fitting portion into the fitting hole portion, the end ring inclined surface and the connecting ring inclined surface function to guide the fitting. This makes it possible to facilitate the assembly process of the pole piece rotor.

15) In some embodiments, the pole piece rotor according to 14) above,
The end ring inclined surface is inclined so that an acute angle (angle θ) with respect to the axial direction is 10 degrees or less.

The configuration of 15) above can suppress the inclination of the end ring inclined surface and the connecting ring inclined surface in the axial direction, so that when torque is transmitted between the end ring and the connecting ring portion, the end ring and the connecting ring portion can be prevented from shifting from each other in the axial direction.

16) In some embodiments, the pole piece rotor according to any one of 1) to 15) above,
The flange further includes a flange main body (450) having an outer peripheral surface (452) extending in the circumferential direction,
The connecting ring portion is provided on the outer peripheral surface of the flange main body portion,
The connecting ring mating portion is
an opposing surface (457) that faces the end ring engaging portion in the circumferential direction and extends along the radial direction of the magnetic gear electric machine;
a connecting inclined surface (459) connected to the inner end of the opposing surface in the radial direction and the outer circumferential surface and inclined with respect to the radial direction;
has.

According to configuration 16) above, by providing the connecting inclined surface, when torque transmission is performed between the connecting ring engaging portion and the end ring engaging portion, the radially inner end of the opposing surface 457 Stress concentration can be suppressed. Thereby, damage to the connecting ring portion can be avoided.

17) In some embodiments, the pole piece rotor according to any one of 1) to 16) above,
another end ring (34) connected to the other end of the annular unit;
a separate flange (44) including a separate connecting ring portion (49) connected to the separate end ring from the other side;
Equipped with
The other end ring has an end ring end face (134A) facing the other side and extending in the circumferential direction,
The separate connecting ring portion has a connecting ring end surface (149A) that faces and contacts the end ring end surface.

According to the configuration of 17) above, a structure in which a separate end ring and a connecting ring portion fit together is not adopted on the other axial side of the pole piece rotor, so the structure of the pole piece rotor can be simplified.

18) In some embodiments, the pole piece rotor according to any one of 1) to 16) above,
another end ring (34) 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 separate end ring includes a separate end ring engagement portion (270) that is convex on the other side or concave on one side in the axial direction,
The separate connecting ring portion includes a separate connecting ring fitting portion (280) that fits into the separate end ring fitting portion.

According to the configuration 18) above, even if the torque transmission between the pole piece rotor and the external rotating device is performed via the flange or another flange, the occurrence of slipping can be suppressed.

19) A magnetic gear electric machine (1) according to at least one embodiment of the present disclosure includes:
The magnetic pole piece rotor (30) according to any one of 1) to 18) above,
a stator (20) including a stator coil (coil 99) arranged radially with the annular unit;
a magnet rotor (30) including a rotor magnet (19) disposed on the opposite side of the stator coil with the annular unit in between;
Equipped with

According to configuration 19) above, for the same reason as 1) above, a magnetic gear electric machine is realized that can suppress a decrease in torque transmission efficiency.

1 : Magnetic gear electric machine 10 : Magnet rotor 19 : Rotor magnet 20 : Stator 30 : Pole piece rotor 31 : End ring 34 : Separate end ring 38 : Insertion part 41 : Flange 42 : Connection ring part 44 : Separate Flange 45 : Regulation hole 49 : Separate connecting ring part 50 : Annular unit 52 : Non-magnetic material 55 : Magnetic pole piece 56 : Magnetic pole piece hole part 59 : Non-magnetic material hole part 70 : End ring mating part 70A : End ring ring Joining part 70B: End ring joining part 70C: End ring joining part 70D: End ring joining part 72: End ring recessed part 77: End ring inclined surface 80: Connection ring joining part 81: Connection ring convex part 87: Connection Ring inclined surface 88: Fastening shaft 99: Coil 134A: End ring end surface 149A: Connecting ring end surface 171: First inner surface 172: Second inner surface 175: Fitting recess 176: Intermediate convex portion 177: Bottom surface 181: First convex Part 182 : Second convex part 185 : Intermediate hole part 191 : First outer surface 192 : Second outer surface 270 : Another end ring fitting part 280 : Another connecting ring fitting part 311 : First end ring hole part 317 : End ring defining convex portion 322 : Second end ring hole 331 : Accommodating recess 335 : End surface 411 : First connecting ring hole 422 : Second connecting ring hole 450 : Flange main body 452 : Outer peripheral surface 457 : Opposing surface 459 : Connection slope S1, S2 : Space θ : Angle

Claims (19)

A pole piece rotor for a magnetic gear electric machine, comprising:
an annular unit including a plurality of magnetic pole pieces and a plurality of non-magnetic bodies alternately arranged in a circumferential direction of the magnetic gear electric machine;
an end ring connected to an end of the annular unit on one axial side of the magnetic gear electric machine;
a flange including a connecting ring portion connected to the end ring from the one side;
Equipped with
The end ring includes an end ring engagement portion that 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 that fits into the end ring mating portion,
Pole piece rotor. The connecting ring engagement portion has at least one connecting ring protrusion portion that is protruding toward the other side,
the end ring engagement portion has at least one end ring recess into which the at least one connection ring protrusion is fitted,
the end ring further includes an accommodating recess that accommodates an end portion of any one of the non-magnetic bodies on the one side and is recessed toward the one side in the axial direction,
At least a portion of the accommodating recess is offset in the circumferential direction with respect to the at least one end ring recess.
2. The pole piece rotor of claim 1. The end ring further includes an end ring defining convex portion that is convex on the other side and is aligned with one of the magnetic pole pieces in the axial direction,
At least a portion of the end ring defining convex portion is aligned with the end ring concave portion in the axial direction;
A pole piece rotor according to claim 2. The depth of the accommodating recess is greater than the depth of the end ring recess.
4. A pole piece rotor according to claim 2 or 3. The end ring fitting portion is fitted into the connecting ring fitting portion in an interference fit state.
A magnetic pole piece rotor according to any one of claims 1 to 3. A plurality of engagements between the end ring engagement portion and the connection ring engagement portion are formed along the circumferential direction.
A magnetic pole piece rotor according to any one of claims 1 to 3. The engagement between the end ring engagement portion and the connection ring engagement portion is configured to be formed at equal intervals along the circumferential direction;
A pole piece rotor according to claim 6. The connecting ring engagement portion has a plurality of connecting ring protrusions that are protruding toward the other side and are arranged at intervals in the circumferential direction,
the end ring engagement portion has a plurality of end ring recesses into which the plurality of connecting ring protrusions are respectively fitted,
the connecting ring portion includes a defining hole portion that defines a space formed between any two of the connecting ring protruding portions adjacent to each other in the circumferential direction,
The end ring further includes an insertion portion disposed inside the defined hole portion,
The circumferential length of the insertion portion is longer than the circumferential length of each of the connecting ring protrusions.
A pole piece rotor according to any one of claims 1 to 3. At least one of the plurality of non-magnetic bodies includes a non-magnetic body hole portion that is open in the axial direction,
the end ring includes a first end ring hole portion that faces the non-magnetic hole portion and is open in the axial direction,
the connecting ring portion includes a first connecting ring hole portion that faces the first end ring hole portion and is open in the axial direction,
A pole piece rotor according to any one of claims 1 to 3. Each of the plurality of non-magnetic bodies includes the non-magnetic hole,
The end ring further includes a plurality of first end ring holes facing each of the plurality of non-magnetic holes,
The connecting ring portion further includes a plurality of first connecting ring holes facing each of the plurality of first end ring holes,
The fastening shaft extends in the axial direction, and further includes a fastening shaft inserted into the non-magnetic hole, the first end ring hole, and the first connecting ring hole.
A pole piece rotor according to claim 9. 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 facing the pole piece hole and open in the axial direction,
The connecting ring portion further includes a second connecting ring hole portion that faces the second end ring hole portion and is open in the axial direction.
A pole piece rotor according to any one of claims 1 to 3. The connecting ring mating portion is
a first convex portion and a second convex portion that are convex toward the other side and are adjacent to each other with an interval in the circumferential direction;
an intermediate hole defining a space formed between the first convex part and the second convex part;
including;
The end ring fitting portion is a fitting recess into which the first convex portion and the second convex portion fit, and includes a bottom surface facing the one side, and an intermediate convex portion protruding from the bottom surface toward the one side. including a mating recess having a
the intermediate protrusion is fitted into the intermediate hole in a clearance fit;
A magnetic pole piece rotor according to any one of claims 1 to 3. The mating recess is
a first inner surface that comes into contact with a first outer surface of the first convex portion opposite to the second convex portion;
a second inner surface that comes into contact with a second outer surface of the second convex portion opposite to the first convex portion;
The first convex portion and the second convex portion are fitted into the mating concave portion in an interference fit state;
A pole piece rotor according to claim 12. The end ring engaging portion is one end surface in the circumferential direction and includes an end ring inclined surface that is inclined with respect to the axial direction,
The connecting ring engagement portion includes a connecting ring slope facing the end ring slope.
A magnetic pole piece rotor according to any one of claims 1 to 3. The end ring inclined surface is inclined so that an acute angle with respect to the axial direction is 10 degrees or less,
A pole piece rotor according to claim 14. The flange further includes a flange main body portion having an outer circumferential surface extending in the circumferential direction,
The connecting ring portion is provided on the outer circumferential surface of the flange main body portion,
The connecting ring joint portion is
an opposing surface that faces the end ring engagement portion in the circumferential direction and extends along a radial direction of the magnetic gear electric machine;
a connecting inclined surface that is connected to the radially inner end of the opposing surface and the outer circumferential surface and is inclined with respect to the radial direction;
having
A pole piece rotor according to any one of claims 1 to 3. another 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 separate end ring has an end ring end face facing the other side and extending in the circumferential direction,
The separate connecting ring portion has a connecting ring end face that faces and contacts the end ring end face,
A magnetic pole piece rotor according to any one of claims 1 to 3. another 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 separate end ring includes a separate end ring engagement portion that is convex on the other side or concave on one side in the axial direction,
The separate connecting ring portion includes a separate connecting ring fitting portion that fits into the separate end ring fitting portion.
A magnetic pole piece rotor according to any one of claims 1 to 3. A magnetic pole piece rotor according to any one of claims 1 to 3,
a stator including a stator coil radially aligned with the annular unit;
a magnet rotor including a rotor magnet disposed on the opposite side of the stator coil with the annular unit in between;
Magnetic gear electric machine with.

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