rotor

Abstract

The present invention provides a rotor. In this rotor, permanent magnets in a first rotor core block and a second rotor core block, which are offset from each other in the circumferential direction by a predetermined angle, are arranged to be spaced apart from each other in the axial direction. Furthermore, the rotor includes a resin filling portion between the magnets, which is resin filled between the permanent magnets arranged to be spaced apart from each other in the axial direction.

Description

Technical Field

[0001] This invention relates to a rotor. Background Technology

[0002] Previously, a rotor having a rotor core was known, wherein the rotor core was formed by stacking multiple rotor core blocks axially. Such a rotor is disclosed, for example, in Japanese Patent Application Publication No. 2017-163761.

[0003] Japanese Patent Application Publication No. 2017-163761 discloses a rotor comprising: a rotor core formed by stacking multiple rotor core blocks having multiple magnet receiving holes in the axial direction; multiple permanent magnets disposed within each of the multiple magnet receiving holes to form magnetic poles; and a resin-filled portion on one side and a resin-filled portion on the other side, wherein resin is filled into each of the multiple magnet receiving holes of each rotor core block on one side and the other side of the permanent magnet in the longitudinal direction, respectively, relative to the permanent magnets. In the rotor described in Japanese Patent Application Publication No. 2017-163761, the multiple rotor core blocks include a first rotor core block and a second rotor core block, the first rotor core block and the second rotor core block are circumferentially offset from each other by a predetermined angle in the position of the magnetic poles of the rotor core blocks, and the first rotor core block and the second rotor core block are axially arranged adjacent to each other. In the rotor described in Japanese Patent Application Publication No. 2017-163761, the permanent magnets of the first rotor core block and the second rotor core block, which are offset from each other by a predetermined angle in the circumferential direction, are arranged such that, when viewed from the axial direction, they at least partially overlap and are in contact with each other in the axial direction.

[0004] Patent Document 1: Japanese Patent Application Publication No. 2017-163761

[0005] However, in the existing rotor described in Japanese Patent Application Publication No. 2017-163761, the permanent magnets of the first rotor core block and the second rotor core block, which are offset from each other by a predetermined angle in the circumferential direction, are arranged such that they at least partially overlap when viewed from the axial direction and are in contact with each other in the axial direction. Therefore, in some cases, at least one of the resin-filled portions on one side of the first rotor core block and the second rotor core block, which are offset from each other by a predetermined angle in the circumferential direction, and the resin-filled portions on the other side of the first rotor core block and the second rotor core block, which are offset from each other by a predetermined angle in the circumferential direction, are not connected. In this case, when multiple rotor core blocks are stacked axially, and resin is used to fill the gaps inside the multiple magnet receiving holes of all rotor core blocks, including the first and second rotor core blocks, where no permanent magnets are disposed, areas where the resin cannot easily reach are easily created. Therefore, it is desirable to have a rotor that, in the state of multiple rotor core blocks stacked axially, not only suppresses the occurrence of parts that are difficult for resin to reach, but also fills the gaps in the multiple magnet receiving holes of all rotor core blocks in the multiple rotor core blocks in the entire batch without permanent magnets. Summary of the Invention

[0006] The present invention was made to solve the above-mentioned problems. One object of the present invention is to provide a rotor that, in the state of multiple rotor core blocks stacked axially, not only suppresses the generation of parts that are difficult for resin to reach, but also fills the gaps in the multiple magnet receiving holes of all rotor core blocks in the multiple rotor core blocks in which permanent magnets are not disposed in a batch with resin.

[0007] To achieve the above objectives, one embodiment of the present invention provides a rotor comprising: a rotor core, which is formed by stacking multiple rotor core blocks having multiple magnet receiving holes in an axial direction; multiple permanent magnets disposed within each of the multiple magnet receiving holes to form magnetic poles; and a resin-filled portion on one side and a resin-filled portion on the other side, wherein resin is filled into each of the multiple magnet receiving holes of each of the multiple rotor core blocks at one and the other sides of the permanent magnets in the longitudinal direction, respectively, relative to the permanent magnets. The multiple rotor core blocks include a first rotor core block and a second rotor core block. The first rotor core block and the second rotor core block have their magnetic poles offset from each other in the circumferential direction by a predetermined angle, and are arranged adjacent to each other in the axial direction. The permanent magnets of the first rotor core block and the second rotor core block, which are offset from each other in the circumferential direction by a predetermined angle, are arranged to at least partially overlap each other when viewed from the axial direction, and are arranged to be spaced apart from each other in the axial direction. The first rotor core block and the second rotor core block are also provided with a resin filling portion between the permanent magnets that are spaced apart from each other in the axial direction.

[0008] In a rotor according to one embodiment of the present invention, as described above, the permanent magnets of the first rotor core block and the second rotor core block, which are offset from each other in the circumferential direction by a predetermined angle, are arranged to be spaced apart from each other in the axial direction. Furthermore, a resin filling portion is provided between the magnets, which is resin filled between the permanent magnets arranged to be spaced apart in the axial direction. Thus, through the resin filling portion between the magnets, at least one of the resin filling portions on one side of the first rotor core block and the second rotor core block that are offset from each other in the circumferential direction by a predetermined angle, and the resin filling portions on the other side of the first rotor core block and the second rotor core block that are offset from each other in the circumferential direction by a predetermined angle, can be easily connected. Furthermore, even if at least one of the resin filling portions on one side of the first rotor core block and the second rotor core block that are offset from each other in the circumferential direction by a predetermined angle, and the resin filling portions on the other side of the first rotor core block and the second rotor core block that are offset from each other in the circumferential direction by a predetermined angle, is not connected through the resin filling portion between the magnets, the resin filling portion between the magnets can easily connect the resin filling portions on one side of the first rotor core block and the other side of the second rotor core block that correspond to the permanent magnets that are offset from each other in the circumferential direction, or can easily connect the resin filling portions on the other side of the first rotor core block and the one side of the second rotor core block that correspond to the permanent magnets that are offset from each other in the circumferential direction. As a result of these practices, in a rotor configuration where multiple rotor core blocks are stacked axially, it is possible not only to suppress the occurrence of areas that are difficult for resin to reach, but also to batch fill the gaps in the multiple magnet receiving holes of all rotor core blocks that do not contain permanent magnets with resin.

[0009] Based on the rotor of a technical solution, preferably, it also includes a flow channel plate, which is disposed between the first rotor core block portion and the second rotor core block portion in the axial direction, and the flow channel plate includes a connecting resin flow channel obtained by filling resin in such a way that the resin-filled portions on one side of the first rotor core block portion and the second rotor core block portion are offset from each other by a predetermined angle in the circumferential direction and the resin-filled portions on the other side are connected to each other.

[0010] With this configuration, the resin-filled portions on one side of the first rotor core block and the second rotor core block, which are offset from each other at a predetermined angle in the circumferential direction, and the resin-filled portions on the other side, can be connected to each other via the connecting resin channels of the flow channel plate. Therefore, even with multiple rotor core blocks stacked axially, not only can the occurrence of areas difficult for resin to reach be effectively suppressed, but also the gaps in the multiple magnet receiving holes of all rotor core blocks, including the first and second rotor core blocks, where no permanent magnets are disposed, can be completely and batch-filled with resin.

[0011] Based on the rotor of a certain technical solution, preferably, the axial dimension of the permanent magnet is equal to the axial dimension of the rotor core block portion, and it also includes a flow channel plate. In the axial direction, the flow channel plate is disposed between the first rotor core block portion and the second rotor core block portion, and the flow channel plate includes a connecting resin flow channel obtained by filling resin in such a way that resin filler resin portions on one side of the first rotor core block portion and the second rotor core block portion are offset from each other in the circumferential direction by a predetermined angle are connected to each other, and resin filler resin portions on the other side of the first rotor core block portion and the second rotor core block portion are offset from each other in the circumferential direction by a predetermined angle are connected to each other, and resin filler resin portions on one side and the other side are offset from each other in the circumferential direction by a predetermined angle are connected to each other to form a resin filler portion between magnets.

[0012] With this configuration, the resin channels connecting the flow channel plate allow for the formation of resin-filled sections between the magnets, even if the axial dimension of the permanent magnet is not smaller than the axial dimension of the rotor core block. Therefore, since the size of the permanent magnet can be relatively increased, the magnetic performance of the rotor can be improved.

[0013] Based on the above-mentioned rotor having a flow channel plate structure, preferably, for each magnetic pole, the connecting resin flow channels are formed in multiple ways and are not connected to each other.

[0014] With this configuration, compared to forming only one connecting resin channel rotor for each magnetic pole, the area of ​​the connecting resin channels in the flow channel plate can be reduced. This, in turn, helps to suppress the decrease in the mechanical strength of the flow channel plate.

[0015] Furthermore, in this application, the rotor of a technical solution may also be configured as follows.

[0016] (Additional Item 1) Based on the above-mentioned rotor with flow channel plate, preferably, in each of the magnetic poles of the plurality of rotor core blocks, the plurality of magnet receiving holes include a one-sided magnet receiving hole and a other-sided magnet receiving hole respectively arranged on one side and the other side in the circumferential direction. The connecting resin flow channel includes a one-sided connecting resin flow channel and a other-sided connecting resin flow channel. The one-sided connecting resin flow channel connects the first rotor core block and the second rotor core block to each other on the side of the filling resin portion offset from each other in the circumferential direction by a predetermined angle. The other-sided connecting resin flow channel connects the first rotor core block and the second rotor core block to each other on the side of the filling resin portion offset from each other in the circumferential direction by a predetermined angle. The resin filling portions on the other side, which are offset from each other by a predetermined angle, are connected to each other. In each magnetic pole, a resin flow channel is connected to the other side corresponding to the magnet receiving hole on one side and a resin flow channel is connected to the other side corresponding to the magnet receiving hole on the other side. The resin filling portions on the other side of the magnet receiving hole on one side of the first rotor core block, the resin filling portions on the other side of the magnet receiving hole on one side of the second rotor core block, the resin filling portions on the other side of the magnet receiving hole on one side of the first rotor core block, and the resin filling portions on the other side of the magnet receiving hole on the other side of the second rotor core block are connected together.

[0017] If configured in this way, even if the distance between the magnet receiving hole on one side and the magnet receiving hole on the other side is relatively close, or if the resin filling part on the other side of the magnet receiving hole on one side of the second rotor core block overlaps with the resin filling part on the other side of the magnet receiving hole on the other side of the first rotor core block in the respective magnetic poles, it is possible to form a resin flow channel on the other side corresponding to the magnet receiving hole on one side and a resin flow channel on the other side corresponding to the magnet receiving hole on the other side.

[0018] (Additional item 2) Based on the above-mentioned rotor having the flow channel plate, preferably, the first rotor core block and the second rotor core block are configured such that at least one of the resin-filled parts on one side and the resin-filled parts on the other side, which are offset from each other by a predetermined angle in the circumferential direction, do not overlap when viewed from the axial direction.

[0019] With this configuration, the resin-filled portions on one side of the first rotor core block and the second rotor core block, which are offset from each other by a predetermined angle in the circumferential direction, can be effectively connected to each other, as well as the resin-filled portions on the other side, through the connecting resin channels of the flow channel plate.

[0020] According to the present invention, as described above, a rotor can be provided that, in a state in which multiple rotor core blocks are stacked axially, not only suppresses the occurrence of parts that are difficult for resin to reach, but also fills the gaps in the multiple magnet receiving holes of all rotor core blocks in the multiple rotor core blocks in which permanent magnets are not disposed in a batch with resin. Attached Figure Description

[0021] Figure 1 This is a view of the rotor of one embodiment of the present invention as seen from the radially outer side.

[0022] Figure 2 This is a diagram showing the rotor of one embodiment of the present invention viewed from the axial direction.

[0023] Figure 3 yes Figure 2 A magnified view of a portion of the image.

[0024] Figure 4 It is along Figure 3 A cross-sectional view along line IV-IV.

[0025] Figure 5 This is a view of the flow channel plate in a rotor according to one embodiment of the present invention, viewed from the axial direction.

[0026] Figure 6 This is a cross-sectional view of the rotor of a first modified example of the present invention.

[0027] Figure 7 This is a cross-sectional view of the rotor of a second modified embodiment of the present invention.

[0028] Figure 8 This is a cross-sectional view of the rotor of the third modified embodiment of the present invention.

[0029] Figure 9 This is a view of the rotor of the fourth modified embodiment of the present invention as seen from the radially outer side.

[0030] Figure 10 This is a view of the rotor of the fifth modified embodiment of the present invention viewed from the axial direction. Detailed Implementation

[0031] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0032] Reference Figures 1-5 The configuration of a rotor 100 according to one embodiment of the present invention will be described.

[0033] (Overall structure of the rotor)

[0034] like Figure 1 As shown, rotor 100 includes rotor core 10. Rotor 100 constitutes part of an internal rotor type rotary electric machine (not shown). The rotary electric machine is, for example, an electric motor, a generator, or a combination of electric motor and generator.

[0035] In the following description, the axial, radial, and circumferential directions of the rotor 100 (rotor core 10) are designated as the Z direction, R direction, and C direction, respectively. Furthermore, one side and the other side of the axial direction (Z direction) are designated as Z1 side and Z2 side, respectively. Additionally, the inner and outer sides of the radial direction (R direction) are designated as R1 side and R2 side, respectively. It should be noted that the axial direction of the rotor 100 (rotor core 10) is along the rotation axis A of the rotor 100 (rotor core 10).

[0036] In the rotor core 10, multiple (four) rotor core blocks 10a are stacked in the Z direction. Each rotor core block 10a is constructed by stacking multiple electromagnet steel sheets (e.g., silicon steel sheets) in the Z direction. Each rotor core block 10a has the same shape except for the magnet receiving hole 10c described later. Viewed from the Z direction, a through hole 10b is formed in the center of the rotor core 10 for the rotor shaft (not shown) to pass through. The through hole 10b penetrates the rotor core 10 in the Z direction.

[0037] like Figure 2 As shown, each of the plurality of rotor core block portions 10a has a plurality of magnet receiving holes 10c. Each of the plurality of magnet receiving holes 10c extends through the rotor core block portion 10a in the Z direction. Figure 3 As shown, at each of the magnetic poles MP of the plurality of rotor core blocks 10a, the plurality of magnet receiving holes 10c include a one-sided magnet receiving hole 10d and a other-sided magnet receiving hole 10e respectively arranged on the C1 side and the C2 side.

[0038] like Figure 2 As shown, each of the plurality of rotor core blocks 10a has a key 10f. In each of the plurality of rotor core blocks 10a, a pair of keys 10f are formed symmetrically with respect to the axis of rotation A.

[0039] The rotor 100 includes a plurality of permanent magnets 20. Each of the plurality of permanent magnets 20 is individually disposed within a plurality of magnet receiving holes 10c. The permanent magnets 20 form magnetic poles MP. Specifically, in each of the plurality of rotor core blocks 10a, two magnet receiving holes 10c are disposed therein (one side of the magnet receiving hole 10d (see reference)). Figure 3 ) and the other side magnet receiving hole 10e (refer to Figure 3 Multiple permanent magnets 20 in the structure form a magnetic pole MP. Viewed from the Z direction, each of the multiple permanent magnets 20 has a rectangular shape.

[0040] (The composition of multiple rotor core blocks)

[0041] like Figure 1As shown, the plurality of rotor core blocks 10a include a first rotor core block 11 and a second rotor core block 12. The first rotor core block 11 and the second rotor core block 12 are arranged adjacent to each other in the Z direction. In the rotor core 10, from the Z1 side to the Z2 side, the first rotor core block 11, the second rotor core block 12, the second rotor core block 12, and the first rotor core block 11 are stacked sequentially.

[0042] like Figure 2 As shown, the first rotor core block 11 and the second rotor core block 12 are offset from each other by a predetermined angle in the C direction, such that the positions of the magnetic poles MP of the rotor core block 10a are not offset. However, the first rotor core block 11 and the second rotor core block 12 are not offset from each other in the C direction, such that the position of the key 10f is not offset.

[0043] (Composition of permanent magnets)

[0044] like Figure 3 As shown, the permanent magnets 20 of the first rotor core block 11 and the second rotor core block 12, which are offset from each other by a predetermined angle in the C direction, are arranged such that, when viewed from the Z direction, they at least partially overlap. Figure 4 As shown, the permanent magnets 20 of the first rotor core block 11 and the second rotor core block 12, which are offset from each other by a predetermined angle in the C direction, are arranged such that they are spaced apart from each other in the Z direction. Furthermore, the dimension W1 of the permanent magnet 20 in the Z direction is smaller than the dimension W2 of the rotor core block 10a in the Z direction.

[0045] The permanent magnets 20 of the second rotor core block sections 12 adjacent to each other in the Z-direction are arranged such that they overlap when viewed from the Z-direction. The permanent magnets 20 of the second rotor core block sections 12 adjacent to each other in the Z-direction are arranged such that they contact each other in the Z-direction. Specifically, in the two second rotor core block sections 12, the permanent magnet 20 of the second rotor core block section 12 on the Z2 side is disposed in the magnet receiving hole 10c, and the Z2-side end of the permanent magnet 20 is aligned with the Z2-side end of the magnet receiving hole 10c. Furthermore, in the two second rotor core block sections 12, the Z2-side end of the permanent magnet 20 of the second rotor core block section 12 on the Z1 side is disposed at the Z1-side portion of the magnet receiving hole 10c of the Z2-side second rotor core block section 12.

[0046] (Composition of the resin-filled portion)

[0047] like Figure 3As shown, the rotor core 10 has a magnet filling portion 30. The magnet filling portion 30 includes a resin filling portion 31 on one side and a resin filling portion 32 on the other side. These are resins that are filled into the permanent magnet 20 on one side and the other side of the permanent magnet 20 respectively, inside the plurality of magnet receiving holes 10c of each of the plurality of rotor core block portions 10a.

[0048] The first rotor core block 11 and the second rotor core block 12 are configured such that at least one of the resin filling portions 31 on one side and the resin filling portions 32 on the other side, which are offset from each other by a predetermined angle in the C direction, does not overlap when viewed from the Z direction. Specifically, among the magnetic poles MP of each of the plurality of rotor core block portions 10a, the resin filling portions 31 on one side of the magnet receiving hole 10d of the first rotor core block portion 11 and the second rotor core block portion 12 partially overlap when viewed from the Z direction. Among the magnetic poles MP of each of the plurality of rotor core block portions 10a, the resin filling portions 32 on the other side of the magnet receiving hole 10d of the first rotor core block portion 11 and the second rotor core block portion 12 do not overlap when viewed from the Z direction. In each of the plurality of rotor core block portions 10a, the resin filling portions 31 on one side of the magnet receiving hole 10e on the other side of the first rotor core block portion 11 and the second rotor core block portion 12 do not overlap when viewed from the Z direction. In each of the plurality of rotor core block portions 10a, the resin filling portions 32 on the other side of the magnet receiving hole 10e on the other side of the first rotor core block portion 11 and the second rotor core block portion 12 partially overlap when viewed from the Z direction. Furthermore, in each of the plurality of rotor core block portions 10a, the resin filling portions 31 on one side of the magnet receiving hole 10e on the other side of the first rotor core block portion 11 and the resin filling portions 32 on the other side of the magnet receiving hole 10d on the other side of the second rotor core block portion 12 partially overlap when viewed from the Z direction.

[0049] like Figure 4 As shown, the magnet filling part 30 includes a magnet inter-resin filling part 33, which is resin filling the space between permanent magnets 20 that are staggered at a predetermined angle in the C direction and spaced apart from each other in the Z direction.

[0050] (Composition of flow channel plate)

[0051] like Figure 1 As shown, the rotor 100 includes a flow channel plate 40 disposed in the Z direction between the first rotor core block portion 11 and the second rotor core block portion 12. Figure 5 As shown, the flow channel plate 40 includes a through hole, which, viewed from the Z direction, has the same shape and size as the through hole 10b of the rotor core block portion 10a. Figure 4As shown, the flow channel plate 40 includes a connecting resin flow channel 41, which is filled with resin to connect the resin-filled portions 31 on one side of the first rotor core block portion 11 and the second rotor core block portion 12, which are offset from each other at a predetermined angle in the C direction, to each other, and the resin-filled portions 32 on the other side to each other.

[0052] The connecting resin channel 41 includes a one-side connecting resin channel 41a and a other-side connecting resin channel 41b. The one-side connecting resin channel 41a connects the resin-filled portions 31 of the first rotor core block portion 11 and the second rotor core block portion 12, which are offset from each other at a predetermined angle in the C direction, to each other. The other-side connecting resin channel 41b connects the resin-filled portions 32 of the first rotor core block portion 11 and the second rotor core block portion 12, which are offset from each other at a predetermined angle in the C direction, to each other.

[0053] Specifically, a resin channel 41a corresponding to one side of the magnet receiving hole 10d connects the first rotor core block 11 and the second rotor core block 12 to each other, forming a resin filling part 31 on one side of the magnet receiving hole 10d. A resin channel 41b corresponding to one side of the magnet receiving hole 10d and a resin channel 41a corresponding to the other side of the magnet receiving hole 10e connects the resin filling parts 32 on one side of the magnet receiving hole 10d in the first rotor core block 11, the resin filling parts 32 on one side of the magnet receiving hole 10d in the second rotor core block 12, the resin filling parts 31 on one side of the magnet receiving hole 10e in the first rotor core block 11, and the resin filling parts 31 on one side of the magnet receiving hole 10d in the second rotor core block 12. That is, the resin channel 41b on the other side corresponding to the magnet receiving hole 10d on one side also serves as the resin channel 41a on the other side corresponding to the magnet receiving hole 10e on the other side. The resin channel 41b on the other side corresponding to the magnet receiving hole 10e on the other side connects the resin filling part 32 on the other side of the magnet receiving hole 10e of the first rotor core block part 11 and the second rotor core block part 12 to each other.

[0054] like Figure 5 As shown, the resin flow channels 41a and 41b on one side corresponding to the same magnet receiving hole 10c are not connected. Specifically, the resin flow channel 41a on one side corresponding to the magnet receiving hole 10d, the resin flow channel 41b on the other side corresponding to the magnet receiving hole 10d (i.e., the resin flow channel 41a on the other side corresponding to the magnet receiving hole 10e), and the resin flow channel 41b on the other side corresponding to the magnet receiving hole 10e are not connected. That is, for each magnetic pole MP, multiple resin flow channels 41 are formed and are not interconnected.

[0055] (Effects of this implementation method)

[0056] In this embodiment, the following effects can be achieved.

[0057] In this embodiment, as described above, the permanent magnets 20 of the first rotor core block portion 11 and the second rotor core block portion 12, which are offset from each other at a predetermined angle in the C direction, are arranged to be spaced apart from each other in the Z direction. Furthermore, the rotor 100 includes a resin filling portion 33 between the magnets, which is resin filled between the permanent magnets 20 arranged to be spaced apart in the Z direction. Thus, through the resin filling portion 33, at least one of the resin filling portions 31 on one side of the first rotor core block portion 11 and the second rotor core block portion 12 that are offset from each other at a predetermined angle in the C direction, and at the other resin filling portion 32 on the other side of the first rotor core block portion 11 and the second rotor core block portion 12 that are offset from each other at a predetermined angle in the C direction, can be easily connected. Furthermore, even if at least one of the resin filling portions 31 on the side of the first rotor core block 11 and the second rotor core block 12 that are offset from each other at a predetermined angle in the C direction, and the resin filling portions 32 on the other side of the first rotor core block 11 and the second rotor core block 12 that are offset from each other at a predetermined angle in the C direction, is not connected through the resin filling portion 33, the resin filling portion 33 can easily connect the resin filling portions 31 on the side of the first rotor core block 11 and the other side of the second rotor core block 12 that correspond to the permanent magnets 20 that are offset from each other at a predetermined angle in the C direction, or can easily connect the resin filling portions 32 on the other side of the first rotor core block 11 and the other side of the second rotor core block 12 that correspond to the permanent magnets 20 that are offset from each other at a predetermined angle in the C direction. As a result of these practices, when multiple rotor core blocks 10a are stacked in the Z direction, it is possible not only to suppress the occurrence of parts that are difficult for resin to reach, but also to fill the gaps of the unplaced permanent magnets 20 inside each of the multiple magnet receiving holes 10c in all rotor core blocks 10a in the multiple rotor core blocks 10a in batches with resin.

[0058] Furthermore, in this embodiment, as described above, the rotor 100 includes a flow channel plate 40 disposed in the Z direction between the first rotor core block portion 11 and the second rotor core block portion 12. This flow channel plate 40 includes connecting resin channels 41 formed by filling resin to connect the first rotor core block portion 11 and the second rotor core block portion 12, which are offset from each other by a predetermined angle in the C direction, to each other. Thus, the connecting resin channels 41 of the flow channel plate 40 can connect the first rotor core block portion 11 and the second rotor core block portion 12, which are offset from each other by a predetermined angle in the C direction, to each other. Therefore, in the state of stacking multiple rotor core blocks 10a in the Z direction, not only can the occurrence of parts that are difficult for resin to reach be effectively suppressed, but also the gaps in the multiple magnet receiving holes 10c of the multiple rotor core blocks 10a, including the first rotor core block 11 and the second rotor core block 12, where no permanent magnet 20 is disposed, can be filled with resin in batches.

[0059] Furthermore, in this embodiment, as described above, the first rotor core block portion 11 and the second rotor core block portion 12 are configured such that at least one of the resin filling portions 31 on one side and the resin filling portions 32 on the other side, which are offset from each other by a predetermined angle in the C direction, does not overlap when viewed from the Z direction. Therefore, the resin filling portions 31 on one side and the resin filling portions 32 on the other side, which are offset from each other by a predetermined angle in the C direction, can be effectively connected via the connecting resin flow channel 41 of the flow channel plate 40.

[0060] Furthermore, in this embodiment, as described above, multiple connecting resin channels 41 are formed for each magnetic pole MP, and they are not interconnected. Therefore, compared to the case where only one connecting resin channel is formed for each magnetic pole, the area of ​​the connecting resin channels 41 in the channel plate 40 can be reduced. This helps to suppress the decrease in the mechanical strength of the channel plate 40.

[0061] Furthermore, in this embodiment, as described above, the plurality of magnet receiving holes 10c include a one-side magnet receiving hole 10d and a other-side magnet receiving hole 10e, which are respectively disposed on the C1 side and the C2 side in each of the magnetic poles MP of the plurality of rotor core blocks 10a. Additionally, the connecting resin channel 41 includes a one-side connecting resin channel 41a and a other-side connecting resin channel 41b. The one-side connecting resin channel 41a connects the resin-filled portions 31 of the first rotor core block 11 and the second rotor core block 12 that are offset from each other at a predetermined angle in the C direction to each other. The other-side connecting resin channel 41b connects the resin-filled portions 32 of the first rotor core block 11 and the second rotor core block 12 that are offset from each other at a predetermined angle in the C direction to each other. Furthermore, in each of the magnetic poles MP, a resin channel 41b is connected to the other side corresponding to the magnet receiving hole 10d on one side, and a resin channel 41a is connected to the other side corresponding to the magnet receiving hole 10e on the other side, connecting the other side filling resin portion 32 in the magnet receiving hole 10d on one side of the first rotor core block 11, the other side filling resin portion 32 in the magnet receiving hole 10d on one side of the second rotor core block 12, the one side filling resin portion 31 in the magnet receiving hole 10e on the other side of the first rotor core block 11, and the one side filling resin portion 31 in the magnet receiving hole 10e on the other side of the second rotor core block 12. Therefore, even when the distance between the magnet receiving hole 10d on one side and the magnet receiving hole 10e on the other side is relatively close, or when the resin filling part 32 on the other side of the magnet receiving hole 10d on one side of the second rotor core block 12 overlaps with the resin filling part 31 on the other side of the magnet receiving hole 10e on the other side of the first rotor core block 11 in the Z direction, it is possible to form a resin flow channel 41b on the other side corresponding to the magnet receiving hole 10d on one side and a resin flow channel 41a on the other side corresponding to the magnet receiving hole 10e on the other side.

[0062] [Variation Example]

[0063] It should be noted that the embodiments disclosed herein should be considered exemplary rather than restrictive in all respects. The scope of the invention is not defined by the description of the above embodiments, but by the claims, and includes all modifications (variations) within the scope and equivalent meaning of the claims.

[0064] For example, in the above embodiment, an example is shown where the rotor 100 includes a flow channel plate 40, which is disposed between the first rotor core block portion 11 and the second rotor core block portion 12 in the Z direction. The flow channel plate 40 includes a connecting resin flow channel 41, which is formed by filling resin to connect the resin-filled portions 31 on one side of the first rotor core block portion 11 and the second rotor core block portion 12, which are offset from each other by a predetermined angle in the C direction, to each other, and the resin-filled portions 32 on the other side, but the present invention is not limited thereto. In the present invention, as according to... Figure 6 In the first variant shown, the rotor 200 may also be without the flow channel plate 40, which is disposed in the Z direction between the first rotor core block 11 and the second rotor core block 12 and includes a resin flow channel 41 formed by filling resin in a manner that connects the resin filling resin parts 31 on one side of the first rotor core block 11 and the second rotor core block 12, which are offset from each other by a predetermined angle in the C direction, to each other and the resin filling resin parts 32 on the other side to each other.

[0065] Furthermore, in the above embodiment, an example is shown where the first rotor core block portion 11 and the second rotor core block portion 12 are configured such that at least one of the resin filling portions 31 on one side and the resin filling portions 32 on the other side, which are offset from each other by a predetermined angle in the C direction (circumferential direction), does not overlap when viewed from the Z direction (axial direction). However, the present invention is not limited to this. In the present invention, the first rotor core block portion and the second rotor core block portion may also be configured such that both the resin filling portions on one side and the resin filling portions on the other side, which are offset from each other by a predetermined angle in the circumferential direction, overlap when viewed from the axial direction.

[0066] Furthermore, in the above embodiment, an example is shown where multiple connecting resin channels 41 are formed for each magnetic pole MP and are not interconnected, but the present invention is not limited thereto. In the present invention, it may also be as follows: Figure 7 As with the rotor 300 in the second modified example shown, only one connecting resin channel 341 is formed for each magnetic pole MP. Figure 7 In the rotor 300, the flow channel plate 340 includes a connecting resin flow channel 341, which connects the side-filled resin portion 31 and the other side-filled resin portion 32 in the magnet receiving hole 10d on one side of the first rotor core block portion 11, the side-filled resin portion 31 and the other side-filled resin portion 32 in the magnet receiving hole 10d on one side of the second rotor core block portion 12, the side-filled resin portion 31 and the other side-filled resin portion 32 in the magnet receiving hole 10e on the other side of the first rotor core block portion 11, and the side-filled resin portion 31 and the other side-filled resin portion 32 in the magnet receiving hole 10e on the other side of the second rotor core block portion 12.

[0067] Furthermore, in the above embodiment, an example is shown in which, in each of the magnetic poles MP, a resin channel 41b is connected to the other side corresponding to one side of the magnet receiving hole 10d, and a resin channel 41a is connected to the other side corresponding to the other side of the magnet receiving hole 10e. This connects the other side of the filling resin portion 32 in one side of the magnet receiving hole 10d of the first rotor core block 11, the other side of the filling resin portion 32 in one side of the magnet receiving hole 10d of the second rotor core block 12, the one side of the filling resin portion 31 in the other side of the magnet receiving hole 10e of the first rotor core block 11, and the one side of the filling resin portion 31 in the other side of the magnet receiving hole 10e of the second rotor core block 12. However, the present invention is not limited to this. In this invention, in each magnetic pole, the resin channel on the other side corresponding to the magnet receiving hole on one side connects the resin filling part on the other side of the magnet receiving hole on one side of the first rotor core block to the resin filling part on the other side of the magnet receiving hole on one side of the second rotor core block. Furthermore, the resin channel on the other side corresponding to the magnet receiving hole on one side connects the resin filling part on the other side of the magnet receiving hole on one side of the first rotor core block to the resin filling part on the other side of the magnet receiving hole on one side of the second rotor core block. The resin channel on the other side corresponding to the magnet receiving hole on one side and the resin channel on the other side corresponding to the magnet receiving hole on one side are not connected.

[0068] Furthermore, in the above embodiment, an example is shown where the dimension W1 of the permanent magnet 20 in the Z direction is smaller than the dimension W2 of the rotor core block portion 10a in the Z direction; however, the present invention is not limited to this. In the present invention, it is also possible for... Figure 8 As shown in the third modified example of rotor 400, the dimension W1 of the permanent magnet 20 in the Z direction is equal to the dimension W2 of the rotor core block portion 10a in the Z direction. It should be noted that in... Figure 8In the third variation shown, the rotor 400 further includes a flow channel plate 440, which is disposed between the first rotor core block portion 11 and the second rotor core block portion 12 in the Z direction. The flow channel plate 440 includes a connecting resin flow channel 441 formed by filling resin with resin to connect the resin filling portions 31 on one side of the first rotor core block portion 11 and the second rotor core block portion 12 that are offset from each other by a predetermined angle in the C direction, and the resin filling portions 32 on the other side of the first rotor core block portion 11 and the second rotor core block portion 12 that are offset from each other by a predetermined angle in the C direction. The connecting resin filling portions 433 formed by connecting the portions that connect the resin filling portions 31 on one side and the portions that connect the resin filling portions 32 on the other side that are offset from each other by a predetermined angle in the C direction are also connected. Therefore, by connecting the resin flow channel 41 of the flow channel plate 40, even if the dimension W1 of the permanent magnet 20 in the Z direction is not smaller than the dimension W2 of the rotor core block portion 10a in the Z direction, the resin filling portion 333 between the magnets can be formed. As a result, since the size of the permanent magnet 20 can be relatively increased, the magnetic performance of the rotor 400 can be improved.

[0069] Furthermore, in the above embodiment, an example is shown where the first rotor core block portion 11, the second rotor core block portion 12, the second rotor core block portion 12, and the first rotor core block portion 11 are stacked sequentially from the Z1 side to the Z2 side; however, the present invention is not limited thereto. In the present invention, it may also be as follows: Figure 9 As shown in the fourth modified example of rotor 500, the first rotor core block portion 11, the second rotor core block portion 12, the first rotor core block portion 11, and the second rotor core block portion 12 are stacked sequentially from the Z1 side to the Z2 side. Alternatively, the second rotor core block portion, the first rotor core block portion, the first rotor core block portion 11, and the second rotor core block portion may be stacked sequentially from the Z1 side to the Z2 side. Alternatively, the second rotor core block portion, the first rotor core block portion, the second rotor core block portion, and the first rotor core block portion 11 may be stacked sequentially from the Z1 side to the Z2 side.

[0070] Furthermore, in the above embodiment, an example is shown where four rotor core blocks 10a are stacked in the Z-direction (axial direction), but the present invention is not limited thereto. In the present invention, two, three, or five or more rotor core blocks may also be stacked in the axial direction.

[0071] Furthermore, in the above embodiment, an example is shown where a magnetic pole MP is formed in each of the plurality of rotor core block portions 10a by arranging a plurality of permanent magnets 20 in two magnet receiving holes 10c (one side magnet receiving hole 10d and the other side magnet receiving hole 10e), but the present invention is not limited thereto. In the present invention, a magnetic pole may also be formed in each of the plurality of rotor core block portions by arranging one or more permanent magnets in one magnet receiving hole, or, as in... Figure 10 Like the rotor 600 in the fifth modified example shown, a magnetic pole MP is formed by multiple permanent magnets 20 arranged in three or more magnet receiving holes 10c. Figure 10 In this configuration, a magnetic pole MP is formed by arranging multiple permanent magnets 20 in two magnet receiving holes 10c (one side magnet receiving hole and the other side magnet receiving hole) on the R2 side and two magnet receiving holes 10c (one side magnet receiving hole and the other side magnet receiving hole) on the R1 side. Each of the two magnet receiving holes 10c on the R1 side is larger than each of the two magnet receiving holes 10c on the R2 side. One permanent magnet 20 is arranged in each of the two magnet receiving holes 10c on the R2 side, and two permanent magnets 20 are arranged in each of the two magnet receiving holes 10c on the R1 side.

[0072] Explanation of reference numerals in the attached figures

[0073] 10… Rotor core, 10a… Rotor core block, 11… First rotor core block, 12… Second rotor core block, 10c… Magnet receiving hole, 20… Permanent magnet, 31… Resin filling part on one side, 32… Resin filling part on the other side, 33, 433… Resin filling part between magnets, 40, 340, 440… Flow channel plate, 41, 341, 441… Connecting resin flow channel, 41a… Connecting resin flow channel on one side, 41b… Connecting resin flow channel on the other side, 100, 200, 300, 400, 500, 600… Rotor, MP… Magnetic pole.

Claims

1. A rotor, wherein, have: The rotor core is formed by stacking multiple rotor core blocks with multiple magnet receiving holes in the axial direction. Multiple permanent magnets are disposed inside each of the multiple magnet receiving holes to form magnetic poles; as well as One side-filled resin portion and the other side-filled resin portion are resin portions filled in each of the plurality of magnet receiving holes in the plurality of rotor core blocks, respectively, relative to the permanent magnet, at one side and the other side of the permanent magnet in the length direction. The plurality of rotor core blocks include a first rotor core block and a second rotor core block, wherein the positions of the magnetic poles of the first rotor core block and the second rotor core block are offset from each other in the circumferential direction by a predetermined angle, and the first rotor core block and the second rotor core block are arranged adjacent to each other in the axial direction. The permanent magnets of the first rotor core block and the second rotor core block, which are offset from each other by the predetermined angle in the circumferential direction, are arranged to at least partially overlap when viewed from the axial direction, and are also arranged to be spaced apart from each other in the axial direction. It also includes a resin filling portion between magnets, which is filled with resin between the permanent magnets arranged in a manner that is spaced apart from each other in the axial direction.

2. The rotor according to claim 1, wherein, It also includes a flow channel plate, which is disposed between the first rotor core block portion and the second rotor core block portion in the axial direction, and the flow channel plate includes a connecting resin flow channel formed by filling the resin with resin in such a way that the resin filling portions on one side of the first rotor core block portion and the second rotor core block portion are offset from each other by a predetermined angle in the circumferential direction and the resin filling portions on the other side are connected to each other.

3. The rotor according to claim 1, wherein, The axial dimension of the permanent magnet is equal to the axial dimension of the rotor core block. The rotor also includes a flow channel plate disposed between the first rotor core block portion and the second rotor core block portion in the axial direction. The flow channel plate includes a connecting resin flow channel formed by filling the resin with resin in a manner that connects the resin-filled portions on one side of the first rotor core block portion and the second rotor core block portion that are offset from each other in the circumferential direction by a predetermined angle, and the resin-filled portions on the other side of the first rotor core block portion and the second rotor core block portion that are offset from each other in the circumferential direction by the predetermined angle, and connects the portion that connects the resin-filled portions on one side to each other and the portion that connects the resin-filled portions on the other side that are offset from each other in the circumferential direction by the predetermined angle to each other.

4. The rotor according to claim 2, wherein, For each of the magnetic poles, the connecting resin channels are formed in multiple ways and are not connected to each other.

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