WO2026034105A1 - Corps rotatif, rotor et moteur - Google Patents

Corps rotatif, rotor et moteur

Info

Publication number
WO2026034105A1
WO2026034105A1 PCT/JP2025/024592 JP2025024592W WO2026034105A1 WO 2026034105 A1 WO2026034105 A1 WO 2026034105A1 JP 2025024592 W JP2025024592 W JP 2025024592W WO 2026034105 A1 WO2026034105 A1 WO 2026034105A1
Authority
WO
WIPO (PCT)
Prior art keywords
hub
rotating body
rotor core
boss
rotor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/JP2025/024592
Other languages
English (en)
Japanese (ja)
Inventor
康司 鎌田
大地 小西
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Publication of WO2026034105A1 publication Critical patent/WO2026034105A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures

Definitions

  • This disclosure relates to a rotating body, a rotor, and a motor.
  • Patent Document 1 describes a rotor for a rotating electric machine for a vehicle, which includes a cylindrical hub and a cylindrical rotor core fitted onto the hub.
  • the outer diameter of the outer surface of the hub where the wall protrudes from the inner surface is reduced, which makes the reaction force input to the rotor core when it is fitted onto the hub more uniform. This prevents the fastening force of the rotor core to the hub from weakening.
  • the present disclosure aims to provide a rotating body, rotor, and motor that can easily equalize the reaction force input to the rotor core when the rotor core is fitted onto the hub, and that can prevent a decrease in the strength of the rotor core and hub.
  • the rotating body having a cylindrical rotor core fitted onto its outer peripheral surface and rotating integrally with the rotor core.
  • the rotating body comprises a cylindrical hub into whose outer peripheral surface the rotor core is fitted, a boss located inside the hub, and a connecting wall connecting the hub and the boss.
  • the connecting wall includes a hub-side connecting portion connected to the hub, and a boss-side connecting portion connected to the boss. The hub-side connecting portion and the boss-side connecting portion are positioned offset from each other in the axial direction along the central axis of the hub.
  • a rotor according to one aspect of the present disclosure includes the rotating body and a cylindrical rotor core fitted onto the outer peripheral surface of the hub of the rotating body.
  • a motor includes the rotor and a stator arranged to face the outer peripheral surface of the rotor.
  • the rotating body, rotor, and motor of the above aspects of the present disclosure make it easier to equalize the reaction force input to the rotor core when the rotor core is fitted onto the hub, and also suppresses a decrease in the strength of the rotor core and hub.
  • FIG. 1 is a cross-sectional view showing a rotor including a rotating body according to one embodiment of the present disclosure.
  • FIG. 2 is a perspective view showing the rotor of the same.
  • FIG. 3 is a perspective view showing the rotating body of the same.
  • FIG. 4 is another perspective view showing the rotating body.
  • FIG. 5 is a cross-sectional view showing the rotor of the same.
  • FIG. 6 is a perspective view showing a motor including the rotor of the same type.
  • FIG. 7 is a perspective view showing the motor with the cover removed.
  • FIG. 8 is a cross-sectional view showing the motor.
  • FIG. 9 is a cross-sectional view showing a modified example of the rotor.
  • FIG. 1 is a cross-sectional view showing a rotor 4 including a rotating body 1 according to one embodiment of the present disclosure.
  • FIG. 2 is a perspective view showing the rotor 4.
  • the rotating body 1 according to one embodiment shown in FIGS. 1 and 2 is a rotating body having a cylindrical rotor core 2 fitted onto its outer peripheral surface and rotating integrally with the rotor core 2.
  • the rotating body 1 includes a cylindrical hub 10 having an outer peripheral surface 100 onto which the rotor core 2 is fitted, a boss 11 located inside the hub 10, and a connecting wall 12 connecting the hub 10 and the boss 11.
  • the connecting wall 12 includes a hub-side connecting portion 120 connected to the hub 10 and a boss-side connecting portion 121 connected to the boss 11. In an axial direction D1 along a central axis L1 of the hub 10, the hub-side connecting portion 120 and the boss-side connecting portion 121 are positioned offset from each other.
  • the rotor 4 comprises a rotating body 1 and a cylindrical rotor core 2 fitted onto the outer peripheral surface 100 of the hub 10 of the rotating body 1.
  • Figure 6 is a perspective view showing a motor 5 equipped with a rotor 4.
  • Figure 7 is a perspective view showing the motor 5 with the cover 9 removed.
  • Figure 8 is a cross-sectional view showing the motor 5.
  • the motor 5 of one embodiment shown in Figures 6 to 8 is equipped with a rotor 4 and a stator 7 arranged to face the outer peripheral surface of the rotor 4.
  • the hub-side connection portion 120 and the boss-side connection portion 121 of the connecting wall 12 connecting the hub 10 and the boss 11 are positioned offset from each other in the axial direction D1 of the hub 10. Therefore, in one embodiment of the rotating body 1, rotor 4, and motor 5, when the rotor core 2 is fitted onto the hub 10, the reaction force at the portion of the hub 10 where the connecting wall 12 protrudes from the inner surface 102 is less likely to be large. As a result, in one embodiment of the rotating body 1, rotor 4, and motor 5, the reaction force input from the hub 10 to the rotor core 2 can be made nearly uniform.
  • the outer diameter of the outer surface 100 of the hub 10 can be made constant, eliminating the need to partially increase the interference between the rotor core 2 and the hub 10 and preventing a decrease in the strength of the rotor core 2 and the hub 10 due to increased reaction force. Therefore, in one embodiment of the rotating body 1, rotor 4, and motor 5, when the rotor core 2 is fitted onto the hub 10, the reaction force input to the rotor core 2 is easily equalized, and a decrease in the strength of the rotor core 2 and hub 10 can be suppressed.
  • FIG. 1 is a cross-sectional view showing the rotor 4 including the rotating body 1 of one embodiment according to the present disclosure.
  • FIG. 2 is a perspective view showing the rotor 4.
  • FIG. 3 is a perspective view showing the rotating body 1 of the same.
  • FIG. 4 is another perspective view showing the rotating body 1 of the same.
  • FIG. 5 is a cross-sectional view showing the rotating body 1 of the same.
  • FIG. 6 is a perspective view showing the motor 5 including the rotor 4 of the same.
  • FIG. 7 is a perspective view showing the motor 5 with the cover 9 removed.
  • FIG. 1 is a cross-sectional view showing the rotor 4 including the rotating body 1 of one embodiment according to the present disclosure.
  • FIG. 3 is a perspective view showing the rotating body 1 of the same.
  • FIG. 4 is another perspective view showing the rotating body 1 of the same.
  • FIG. 5 is a cross-sectional view showing the rotating body 1 of the same.
  • FIG. 6 is a perspective view showing the
  • the motor 5 is used in a driving vehicle equipped with an engine as a driving power source for traveling, a hybrid vehicle equipped with an engine and a driving motor, an electric vehicle, or the like.
  • the motor 5 is connected to the crankshaft of the engine, for example.
  • the motor 5 is used as a generator or for starting the engine.
  • the rotating body 1 includes a cylindrical hub 10. Below, each component will be described based on the axial direction D1 along (more specifically, parallel to) the central axis L1 of the hub 10.
  • the rotating body 1 includes a cylindrical hub 10 having an outer peripheral surface 100 onto which the rotor core 2 is fitted, a boss 11 located inside the hub 10, and a connecting wall 12 connecting the hub 10 and the boss 11. As shown in Fig. 1, the rotating body 1 further includes a rotor core receiving portion 13 that protrudes from the outer peripheral surface 100 of the hub 10 and receives one end of the rotor core 2 in the axial direction D1.
  • the rotating body 1 is made of metal and is formed by forging, for example.
  • the rotor core receiving portion 13 protrudes radially outward from a portion of the outer peripheral surface 100 in the axial direction D1.
  • the rotor core receiving portion 13 is provided in an annular shape when viewed in the axial direction D1.
  • the portion of the outer peripheral surface 100 of the hub 10 on one side of the rotor core receiving portion 13 in the axial direction D1 forms the fitting surface 101 into which the rotor core 2 is fitted.
  • the fitting surface 101 has a constant outer diameter over the entire length in the axial direction D1.
  • the inner peripheral surface 102 of the hub 10 has a constant inner diameter over the entire length in the axial direction D1.
  • the connecting wall 12 includes a hub-side connection portion 120 connected to the hub 10 and a boss-side connection portion 121 connected to the boss 11. In the axial direction D1 along the central axis L1 of the hub 10, the hub-side connection portion 120 and the boss-side connection portion 121 are positioned offset from each other.
  • the hub-side connection portion 120 is connected to a portion of the inner circumferential surface 102 of the hub 10 that is behind the fitting surface 101 (i.e., a portion that is located at the same position in the axial direction D1 as the fitting surface 101).
  • the hub-side connection portion 120 is connected to a portion of the inner circumferential surface 102 that is behind a point slightly farther from the rotor core receiving portion 13 than the midpoint of the fitting surface 101 in the axial direction D1.
  • the rotor core receiving portion 13 and the hub-side connection portion 120 are located apart in the axial direction D1.
  • the connection position of the hub-side connection portion 120 is set at an appropriate position that makes it easy to equalize the reaction force generated between the fitting surface 101 and the rotor core 2.
  • the cross-sectional shape of the connecting wall 12 in an imaginary plane including the central axis L1 is a curved line.
  • the cross-sectional shape of the connecting wall 12 is a line curved in an S-shape.
  • the boss 11 includes a disk-shaped main body portion 110 that is concentric with the hub 10.
  • the boss 11 further includes a shaft portion 111 that protrudes from the center of the main body portion 110 to one side in the axial direction D1 and is concentric with the main body portion 110.
  • the main body portion 110 is located in the center of the hub 10 in the axial direction D1.
  • the space inside the hub 10 is divided into two in the axial direction D1 by the main body portion 110 and the connecting wall 12.
  • Six insertion holes 112 are provided in the main body 110.
  • the six insertion holes 112 are positioned at equal intervals around the circumference of the main body 110. When viewed in the axial direction D1, the six insertion holes 112 are positioned to surround the shaft portion 111.
  • the shaft 3 shown in Figure 1 is an output shaft that connects the motor 5 to a load other than the motor 5 (an engine in this embodiment).
  • the shaft 3 has a cylindrical shaft body 30 and a flange portion 31 that protrudes radially outward from one end of the shaft body 30 in the axial direction D1.
  • the flange portion 31 has a plurality of fixing holes 310 (six in this embodiment) to which fixing devices 6 are fixed, which are formed so as to pass through the flange portion 31 in the axial direction D1.
  • the arrangement of the six fixing holes 310 is the same as the arrangement of the six insertion holes 112.
  • the shaft 3 is fixed to the boss 11 by fastening multiple fasteners 6 inserted into multiple insertion holes 112 in the main body 110 of the boss 11 to multiple fastening holes 310 in the flange portion 31 of the shaft 3.
  • the shaft 3 is arranged concentrically with the axial portion 111 of the boss 11.
  • the boss-side connection portion 121 of the connecting wall 12 is connected to the outer peripheral surface 113 of the main body portion 110. More specifically, the boss-side connection portion 121 is connected to one half of the outer peripheral surface 113 on one side in the axial direction D1 (the lower side in Figure 1).
  • the connecting wall 12 connects the outer peripheral surface 113 of the main body 110 and the inner peripheral surface 102 of the hub 10 around the entire circumferential direction. Therefore, the cross-sectional shape of the connecting wall 12 in an imaginary plane including the central axis L1 is constant around the entire circumferential direction of the hub 10.
  • the connecting wall 12 is composed of a linear first portion 122, an arc-shaped second portion 123, an arc-shaped third portion 124, and a linear fourth portion 125.
  • the first portion 122 extends radially outward in a straight line from the outer peripheral surface 113.
  • the second portion 123 extends in an arc shape from one end of the first portion 122 (the end opposite the outer peripheral surface 113) toward one side in the axial direction D1.
  • the third portion 124 extends in an arc shape that is convex on the side opposite the second portion 123 from one end of the second portion 123 (the end opposite the first portion 122) toward one side in the axial direction D1.
  • the fourth portion 125 extends radially outward in a straight line from one end of the third portion 124 (the end opposite the second portion 123).
  • One end of the first portion 122 (the end opposite the second portion 123) forms the boss side connection portion 121, and one end of the fourth portion 125 (the end opposite the third portion 124) forms the hub side connection portion 120.
  • the rotor 4 includes the above-described rotating body 1 and a cylindrical rotor core 2 fitted onto the outer peripheral surface 100 of the hub 10 of the rotating body 1.
  • the rotor core 2 has a cylindrical main body 21 provided with a plurality of accommodating holes 210 in which permanent magnets 20 are arranged, and a pair of annular plates 22, 23 that sandwich the main body 21 in the axial direction D1.
  • the plurality of accommodating holes 210 are provided at intervals circumferentially so as to extend around the entire circumferential circumference of the main body 21.
  • a plurality of block-shaped permanent magnets 20 are arranged in each of the plurality of accommodating holes 210 so as to be aligned in the axial direction D1.
  • the pair of plates 22, 23 close both ends of each of the plurality of accommodating holes 210 in the main body 21 in the axial direction D1.
  • the rotor core 2 is fitted onto the hub 10 so that the plate 23 on one side in the axial direction D1 abuts the rotor core receiving portion 13.
  • the rotor core 2 is fitted onto the hub 10 by shrink fitting.
  • the rotor core 2 may also be fitted onto the hub 10 by force fitting.
  • the inner circumferential surfaces of the main body 21 and the pair of plates 22, 23 are fitted onto the fitting surface 101 of the hub 10. This allows the rotor core 2 to rotate integrally with the rotating body 1.
  • the motor 5 includes the rotor 4 described above and a stator 7 disposed opposite the outer peripheral surface of the rotor 4.
  • the motor 5 further includes a cylindrical motor housing 8 that covers the rotor 4 and stator 7 from the outer periphery, and a cover 9 that is attached to the motor housing 8 so as to cover an opening on one side of the motor housing 8 in the axial direction D1.
  • the stator 7 has an iron core 70, a frame-shaped insulator 71 that houses the iron core 70, a coil 72 wound around the insulator 71, and an outer frame 73 that holds the iron core 70.
  • the stator 7 has multiple sets of iron core 70, insulator 71, and coil 72, and the multiple sets are arranged at intervals in the circumferential direction.
  • the coil 72 is a coil formed by winding a rectangular conductor wire with a square cross section by edgewise bending.
  • the cover 9 has a retaining portion 90 that protrudes inside the hub 10.
  • a bearing 91 is held in the retaining portion 90.
  • the retaining portion 90 is cylindrical.
  • the bearing 91 is an annular ball bearing.
  • the bearing 91 is attached to the inner peripheral surface of the retaining portion 90.
  • the shaft portion 111 of the rotating body 1 is rotatably supported by the bearing 91.
  • the tip of the shaft portion 111 in the axial direction D1 fits within the retaining portion 90 and does not pass through the cover 9.
  • the cover 9 is attached to the motor housing 8 with fasteners 14 such as screws.
  • fasteners 14 such as screws.
  • the motor housing 8 is attached to the bracket 15.
  • the shaft 3 is rotatably supported by the bracket 15 and protrudes from the bracket 15 toward the motor 5.
  • the shaft 3 is the output shaft that connects the motor 5 to a load other than the motor 5.
  • the bracket 15 has a cylindrical holding portion 150 that protrudes to one side in the axial direction D1.
  • a bearing 151 made of an annular ball bearing is attached to the inner surface of the holding portion 150.
  • the shaft 3 is rotatably supported by the bearing 151.
  • the bracket 15 has an insertion hole 152 through which the shaft 3 passes in the axial direction D1.
  • the insertion hole 152 is located inside the holding portion 150.
  • the bracket 15 is provided with multiple bolts 16 that protrude toward one side in the axial direction D1 (toward the motor 5).
  • the motor housing 8 is provided with multiple insertion holes 80 into which the multiple bolts 16 are inserted.
  • the motor 5 is attached to the bracket 15 by inserting the multiple bolts 16 protruding from the bracket 15 into the multiple insertion holes 80 in the motor housing 8. With the cover 9 removed, fasteners 6 are inserted into each of the multiple insertion holes 112 in the boss 11 and fastened to the multiple fixing holes 310 in the flange portion 31 of the shaft 3, thereby fixing the shaft 3 to the boss 11. In this way, the motor 5 is attached to the bracket 15 and shaft 3. After fixing the shaft 3 to the boss 11, the cover 9 is fixed to the motor housing 8 with multiple fixing devices 14.
  • the retaining portion 150 of the bracket 15 and a portion of the bearing 151 in the axial direction D1 are housed inside the hub 10. This allows the motor 5 to be attached to the bracket 15 with a reduced thickness in the axial direction D1.
  • the motor 5 functions as a generator that generates electricity, for example, by rotating the rotor 4 in response to the rotation of the shaft 3.
  • the motor 5 rotates the shaft 3 by passing electricity through the stator 7 to rotate the rotor 4, thereby functioning as a motor for starting the engine.
  • the hub-side connecting portion 120 and the boss-side connecting portion 121 of the connecting wall 12 are positioned offset from each other in the axial direction D1, as shown in Figure 1. Therefore, in the rotating body 1 of this embodiment, when the rotor core 2 is fitted onto the hub 10, the reaction force at the portion of the hub 10 where the connecting wall 12 protrudes from the inner circumferential surface 102 is less likely to become large, and the reaction force input from the hub 10 to the rotor core 2 can be made more uniform.
  • the outer diameter of the fitting surface 101 of the hub 10 is constant along the axial direction D1, so the interference fit length between the hub 10 and the rotor core 2 (i.e., the length of the fitted portions in the axial direction D1) can be increased. Therefore, in the rotating body 1 of this embodiment, there is no need to partially increase the interference between the rotor core 2 and the hub 10 (i.e., the length of the fitted portions in the radial direction), and a decrease in the strength of the rotor core 2 and hub 10 due to an increase in reaction force can be suppressed.
  • the cross-sectional shape of the connecting wall 12 in an imaginary plane including the central axis L1 is a curved line, so the connecting wall 12 is prone to deflection. Therefore, in this respect as well, the rotating body 1 of this embodiment makes it easy to suppress the reaction force acting on the rotor core 2 at the portion of the hub 10 where the connecting wall 12 protrudes from the inner circumferential surface 102.
  • the hub-side connection portion 120 is located away from the rotor core receiving portion 13, so the portion of the hub 10 where the connecting wall 12 protrudes is less affected by the increased strength provided by the rotor core receiving portion 13, making it easier to achieve uniform reaction forces during external fitting.
  • the rotor 4 and motor 5 of this embodiment include the rotating body 1 described above, it is easier to equalize the reaction force input to the rotor core 2 when the rotor core 2 is fitted onto the hub 10, and it is possible to prevent a decrease in the strength of the rotor core 2 and hub 10.
  • the motor 5 of this embodiment is combined with the bracket 15 so that the retaining portion 150 and a portion of the bearing 151 provided on the bracket 15 are positioned inside the hub 10. Therefore, the motor 5 of this embodiment can be easily combined with the bracket 15 while minimizing the amount of protrusion from the bracket 15.
  • the cover 9 is attached to the motor housing 8 so that the retaining portion 90 of the cover 9 and part of the bearing 91 are located inside the hub 10, making it easy to reduce the length of the motor 5 in the axial direction D1.
  • the rotating body 1 does not need to have a rotor core receiving portion 13. If the rotor core 2 is force-fit onto the outer peripheral surface 100 of the hub 10, the rotor core receiving portion 13 may be omitted.
  • the connecting wall 12 is not limited to the structure shown in Figure 1, etc., as long as the hub-side connection portion 120 and the boss-side connection portion 121 are positioned offset from each other in the axial direction D1.
  • the cross-sectional shape of the connecting wall 12 in an imaginary plane including the central axis L1 may be a curved line, and is not limited to the S-shape shown in Figure 1.
  • This cross-sectional shape may be, for example, an inverted S-shape (i.e., the arcs of the second portion 123 and the third portion 124 are convex in opposite directions), or may be an arc convex on one side of the axial direction D1, or an arc convex on the other side of the axial direction D1, without being limited to an S-shape.
  • Figure 9 is a cross-sectional view showing a modified example of a rotor 4 according to one embodiment of the present disclosure.
  • the cross-sectional shape of the connecting wall 12 in an imaginary plane including the central axis L1 may be a shape composed mainly of straight lines, as in the modified example shown in Figure 9.
  • the connecting wall 12 further has a straight intermediate portion 126 located between the arc-shaped second portion 123 and the arc-shaped third portion 124.
  • the intermediate portion 126 extends in a direction intersecting the axial direction D1.
  • the arc-shaped second portion 123 and third portion 124 are shorter than the second portion 123 and third portion 124 of the first embodiment.
  • the cross-sectional shape of the connecting wall 12 in an imaginary plane including the central axis L1 does not have to be constant around the entire circumferential direction of the hub 10.
  • the cross-sectional shape of the connecting wall 12 in one imaginary plane including the central axis L1 may be different from the cross-sectional shape of the connecting wall 12 in another imaginary plane including the central axis L1.
  • the connecting wall 12 may be composed of multiple walls spaced apart around the circumferential direction of the hub 10. In this case, each of the multiple walls is configured so that the hub-side connecting portion 120 and the boss-side connecting portion 121 are offset from each other in the axial direction D1.
  • the boss 11 does not have to have a disk-shaped main body 110 concentric with the hub 10, and the shape and arrangement of the main body 110 are not limited to those shown in Figure 1.
  • the boss 11 is not limited to being one to which the shaft 3 is fixed, but may also be one in which the shaft portion 111 protrudes from the main body portion 110 on both sides in the axial direction D1.
  • the boss 11 does not have to have a shaft portion 111, and the shaft 3 may be fixed so as to pass through the main body portion 110.
  • the boss 11 may have the shaft 3 fixed to each side of the main body portion 110 in the axial direction D1.
  • Shaft 3 may be the crankshaft of an engine or the clutch shaft of a clutch.
  • bracket 15 is the engine housing or the clutch housing.
  • the rotor 4 and motor 5 are not limited to the structures shown in Figures 1 and 8.
  • the shaft 3 and bracket 15 do not have to be part of the engine or clutch configuration.
  • the motor 5 may also include the shaft 3 and bracket 15.
  • the rotating body (1) of the first aspect has the following configuration.
  • the rotating body (1) of the first embodiment is a rotating body (1) into whose outer peripheral surface a cylindrical rotor core (2) is fitted and which rotates integrally with the rotor core (2).
  • the rotating body (1) comprises a cylindrical hub (10) into whose outer peripheral surface (100) the rotor core (2) is fitted, a boss (11) located inside the hub (10), and a connecting wall (12) connecting the hub (10) and the boss (11).
  • the connecting wall (12) includes a hub-side connecting portion (120) connected to the hub (10) and a boss-side connecting portion (121) connected to the boss (11). In the axial direction (D1) along the central axis (L1) of the hub (10), the hub-side connecting portion (120) and the boss-side connecting portion (121) are positioned offset from each other.
  • the hub-side connection portion (120) and the boss-side connection portion (121) of the connecting wall (12) connecting the hub (10) and the boss (11) are positioned offset from each other in the axial direction (D1) of the hub (10). Therefore, in the first embodiment of the rotating body (1), when the rotor core (2) is fitted onto the hub (10), the reaction force at the portion of the hub (10) where the connecting wall (12) protrudes from the inner peripheral surface (102) is less likely to be large. This allows the first embodiment of the rotating body (1) to make the reaction force input from the hub (10) to the rotor core (2) nearly uniform.
  • the outer diameter of the outer peripheral surface (100) of the hub (10) can be kept constant, eliminating the need to partially increase the interference between the rotor core (2) and the hub (10), thereby preventing a decrease in the strength of the rotor core (2) and the hub (10) due to increased reaction force. Therefore, in the rotating body (1) of the first embodiment, when the rotor core (2) is fitted onto the hub (10), the reaction force input to the rotor core (2) is easily equalized, and a decrease in the strength of the rotor core (2) and hub (10) can be suppressed.
  • the rotating body (1) of the second aspect additionally has the following configuration in addition to the configuration of the first aspect.
  • the cross-sectional shape of the connecting wall (12) in an imaginary plane including the central axis (L1) is a curved line.
  • the connecting wall (12) is easily deflected when the rotor core (2) is fitted onto the hub (10), making it easier to equalize the reaction force during fitting.
  • the rotating body (1) of the third aspect additionally has the following configuration in addition to the configuration of the first or second aspect.
  • the rotating body (1) of the third embodiment further includes a rotor core receiving portion (13) that protrudes from the outer peripheral surface (100) of the hub (10) and receives one end of the rotor core (2) in the axial direction (D1).
  • the rotor core receiving portion (13) and the hub-side connecting portion (120) are positioned apart in the axial direction (D1).
  • the portion of the hub (10) where the connecting wall (12) protrudes is less affected by the increased strength of the hub (10) provided by the rotor core receiving portion (13), making it easier to achieve a uniform reaction force during external fitting.
  • the rotating body (1) of the fourth aspect additionally has the following configuration in addition to the configuration of any one of the first to third aspects.
  • the boss (11) includes a disk-shaped main body portion (110) concentric with the hub (10).
  • the boss-side connection portion (121) is connected to the outer peripheral surface (113) of the main body portion (110).
  • the hub-side connection portion (120) is connected to the inner peripheral surface (102) of the hub (10).
  • the cross-sectional shape of the connecting wall (12) in an imaginary plane including the central axis (L1) is constant around the entire circumferential direction of the hub (10).
  • the cross-sectional shape of the connecting wall (12) is constant over the entire circumference, making it easy to equalize the reaction force during external fitting over the entire circumference.
  • the rotor (4) of the fifth aspect comprises a rotating body (1) of any one of the first to fourth aspects and a cylindrical rotor core (2) fitted onto the outer peripheral surface (100) of the hub (10) of the rotating body (1).
  • the rotor (4) of the fifth aspect having the above configuration includes the rotating body (1) described above, which makes it easier to equalize the reaction force during external fitting and also prevents a decrease in the strength of the rotor core (2) and hub (10).
  • the motor (5) of the sixth aspect includes the rotor (4) of the fifth aspect and a stator (7) arranged to face the outer peripheral surface of the rotor (4).
  • the motor (5) of the sixth aspect having the above configuration includes the rotating body (1) described above, which makes it easier to equalize the reaction force during external fitting and also prevents a decrease in the strength of the rotor core (2) and hub (10).
  • Rotating body 10 Hub 100 Outer peripheral surface 102 Inner peripheral surface 11 Boss 110, 21 Main body 111 Shaft portion 112 Insertion hole 113 Outer peripheral surface 12 Connecting wall 120 Hub side connection portion 121 Boss side connection portion 122 First portion 123 Second portion 124 Third portion 125 Fourth portion 126 Intermediate portion 13 Rotor core receiving portion 14 Fixing device 15 Bracket 150 Holding portion 151 Bearing 152 Insertion hole 16 Bolt 2 Rotor core 210 Accommodating hole 22 Plate 23 Plate 3 Shaft 31 Flange portion 310 Fixing hole 4 Rotor 5 Motor 6 Fixing device 7 Stator 70 Iron core 71 Insulator 72 Coil 73 Outer frame 8 Motor housing 80 Insertion hole 9 Cover 90 Holding portion 91 Bearing D1 Axial direction L1 Central axis

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

Dans la présente invention, un noyau de rotor cylindrique est ajusté sur la surface périphérique externe d'un corps rotatif, et le corps rotatif tourne d'un seul tenant avec le noyau de rotor. Le corps rotatif comprend un moyeu cylindrique sur lequel le noyau de rotor est ajusté sur la surface périphérique externe, un bossage positionné à l'intérieur du moyeu, et une paroi de liaison qui relie le moyeu et le bossage. La paroi de liaison comprend une partie de liaison côté moyeu reliée au moyeu, et une partie de liaison côté bossage reliée au bossage. Dans la direction axiale le long de l'axe central du moyeu, la partie de liaison côté moyeu et la partie de liaison côté bossage sont décalées l'une par rapport à l'autre. Ce rotor comprend le corps rotatif et le noyau de rotor cylindrique ajusté sur la surface périphérique externe du moyeu du corps rotatif. Ce moteur comprend le rotor et un stator disposé de façon à faire face à la surface périphérique externe du rotor.
PCT/JP2025/024592 2024-08-07 2025-07-09 Corps rotatif, rotor et moteur Pending WO2026034105A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2024131090 2024-08-07
JP2024-131090 2024-08-07

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WO2026034105A1 true WO2026034105A1 (fr) 2026-02-12

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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JP2011254663A (ja) * 2010-06-03 2011-12-15 Toyota Motor Corp 回転電機用ロータの製造方法及び回転電機用シャフト素材
WO2016075739A1 (fr) * 2014-11-10 2016-05-19 三菱電機株式会社 Machine électrique tournante
JP2016103882A (ja) * 2014-11-27 2016-06-02 アイシン・エィ・ダブリュ株式会社 ロータおよびロータの製造方法
JP2019054643A (ja) * 2017-09-15 2019-04-04 アイシン・エィ・ダブリュ株式会社 ロータ

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59145273U (ja) * 1983-03-17 1984-09-28 国産電機株式会社 フライホイ−ル磁石回転子
JP2011254663A (ja) * 2010-06-03 2011-12-15 Toyota Motor Corp 回転電機用ロータの製造方法及び回転電機用シャフト素材
WO2016075739A1 (fr) * 2014-11-10 2016-05-19 三菱電機株式会社 Machine électrique tournante
JP2016103882A (ja) * 2014-11-27 2016-06-02 アイシン・エィ・ダブリュ株式会社 ロータおよびロータの製造方法
JP2019054643A (ja) * 2017-09-15 2019-04-04 アイシン・エィ・ダブリュ株式会社 ロータ

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