Rotor and motor

Abstract

Position multiple magnets without using jigs. [Solution] The rotor frame has a top plate, a cylindrical portion, and a plurality of positioning pins. The cylindrical portion extends from the outer peripheral end of the top plate to the first axial side. The positioning pins extend from the top plate to the first axial side. The positioning pins are arranged radially inward of the cylindrical portion. Each positioning pin is spaced apart from the others in the circumferential direction. The yoke is positioned radially between the cylindrical portion and the positioning pins. The magnets are positioned between the positioning pins.

Description

Technical Field

[0001] The present invention relates to a rotor and a motor.

Background Art

[0002] The drone motor disclosed in Patent Document 1 has a rotor and a stator. The rotor has a frame, a yoke, and a plurality of magnets. The plurality of magnets are attached to the inner peripheral surface of the yoke. The plurality of magnets are arranged at intervals in the circumferential direction.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] After the plurality of magnets are positioned by a jig, they are fixed to the yoke. When each magnet is fixed to the yoke with an adhesive, there is a problem such as the jig also being adhered. Therefore, an object of the present invention is to provide a rotor capable of positioning a plurality of magnets without using a jig.

Means for Solving the Problems

[0005] The rotor according to the first aspect includes a rotor frame, a yoke, and a plurality of magnets. The rotor frame has a top plate portion, a cylindrical portion, and a plurality of positioning pins. The cylindrical portion extends from the outer peripheral end portion of the top plate portion to the first side in the axial direction. The positioning pins extend from the top plate portion to the first side in the axial direction. The positioning pins are arranged inside the cylindrical portion in the radial direction. Each positioning pin is arranged at intervals in the circumferential direction. The yoke is arranged between the cylindrical portion and the positioning pins in the radial direction. The magnets are arranged between the positioning pins.

[0006] In this configuration, the rotor frame has positioning pins that are spaced apart from each other in the circumferential direction. Therefore, by placing magnets between adjacent positioning pins, multiple magnets can be positioned without the use of jigs.

[0007] The rotor according to the second embodiment is configured as follows in the rotor according to the first embodiment: The top plate portion, the cylindrical portion, and each positioning pin are integrally formed from resin.

[0008] The rotor according to the third embodiment is configured as follows in the rotor according to the first or second embodiment: The rotor frame is made of fiber-reinforced plastic.

[0009] The rotor according to the fourth embodiment is configured as follows in the rotor according to the third embodiment: Multiple fibers contained in the central part of the top plate are randomly oriented. Multiple fibers contained in the part of the top plate excluding the central part are oriented radially.

[0010] The rotor according to the fifth embodiment further comprises a shaft in the rotor according to any of the first to fourth embodiments. The shaft extends from inside the top plate portion to the first axial side.

[0011] The rotor according to the sixth embodiment is configured as follows in the rotor according to the fifth embodiment: The shaft has an embedded portion and a shaft body portion. The embedded portion is embedded in the top plate portion. The embedded portion is processed by at least one of knurling and grooving. The shaft body portion extends axially from the top plate portion.

[0012] The rotor according to the seventh embodiment is configured as follows in the rotor according to any of the first to sixth embodiments: The rotor frame has a plurality of contact portions. Each contact portion contacts a corresponding magnet in the axial direction. The contact portions are positioned between a pair of adjacent positioning pins in the circumferential direction. The contact portions are spaced apart from each positioning pin.

[0013] The rotor according to the eighth embodiment further comprises a nut in the rotor according to any of the first to seventh embodiments. The nut is embedded in the top plate portion.

[0014] The rotor according to the ninth embodiment is configured as follows in the rotor according to the eighth embodiment: A portion of the nut protrudes from the top plate portion to the second axial side.

[0015] The rotor according to the tenth embodiment is configured as follows in the rotor according to any of the first to ninth embodiments: The positioning pin is shorter than the cylindrical portion.

[0016] The rotor according to the 11th embodiment is configured as follows in the rotor according to any of the 1st to 10th embodiments: The rotor frame is integrally formed with the yoke by insert molding.

[0017] The rotor according to the twelfth embodiment further comprises a shaft and a nut in addition to the rotor according to any of the first to eleventh embodiments. The shaft extends from inside the top plate portion to the first axial side. The nut is embedded in the top plate portion. The rotor frame is integrally formed with the yoke, shaft, and nut by insert molding.

[0018] The rotor according to the 13th embodiment is configured as follows in the rotor according to any of the first to 12 embodiments: The positioning pin has a first part and a second part. The first part is located on the first side in the axial direction. The second part is located on the second side in the axial direction. The width of the first part gradually decreases toward the first side in the axial direction. The width of the second part is constant in the axial direction.

[0019] The rotor according to the 14th embodiment is configured as follows in the rotor according to any of the 1st to 13th embodiments: The yoke is cylindrical. Of the inner circumferential surface of the yoke, the portion facing the magnet has a rougher surface than the portion facing the positioning pin.

[0020] The motor according to the 15th aspect includes a rotor according to any one of the 1st to 14th aspects and a stator.

Effect of the Invention

[0021] According to the present invention, the positioning of a plurality of magnets can be achieved without using a jig.

Brief Description of the Drawings

[0022] [[ID=第十三]] [Figure 1] Cross-sectional view of the motor. [Figure 2] Cross-sectional perspective view of the motor. [Figure 3] Diagram showing the magnet positioning structure. [Figure 4] Diagram showing the positioning pin according to the modified example.

Mode for Carrying Out the Invention

[0023] Hereinafter, the rotor 3 and the motor 100 according to the present embodiment will be described with reference to the drawings. In the following description, the axial direction is the direction in which the rotation axis O of the rotor 3 extends. The circumferential direction is the circumferential direction of a circle centered on the rotation axis O, and the radial direction is the radial direction of a circle centered on the rotation axis O. In the present embodiment, the first side in the axial direction means the lower side in FIG. 1, and the second side in the axial direction means the upper side in FIG. 1.

[0024] FIG. 1 is a cross-sectional view of the motor 100. As shown in FIG. 1, the motor 100 has a stator 2 and a rotor 3. The motor 100 is a motor for a drone. Specifically, this motor 100 is used for an industrial drone. The motor 100 is configured to rotate a propeller (not shown) of the drone. The propeller is arranged on the second side in the axial direction with respect to the motor 100. The rotation axis O of the motor 100 extends in the vertical direction. That is, in the present embodiment, the axial direction means the vertical direction.

[0025] It should be noted that in the above translation, "第十三" in the original text seems to be an incorrect or mislabeled item. It is translated as it is here, but it may need to be corrected in the original source for a more accurate translation.A drone is equipped with multiple of these motors 100. Typically, a drone has four of these motors 100. Each motor 100 is attached to the drone's body via an arm or similar mechanism. The drone's body houses the battery, control unit, and other components.

[0026] <Stata> The stator 2 is positioned so as not to rotate. The stator 2 is located on the first axial side relative to the rotor 3. The stator 2 has a stator frame 21, a stator core 22, and a plurality of coil sections 23.

[0027] The stator frame 21 has a first cylindrical portion 211, a second cylindrical portion 212, a third cylindrical portion 213, a first connecting portion 214, and a second connecting portion 215.

[0028] The first cylindrical portion 211 extends in the axial direction. Multiple bearing members 7 are installed inside the first cylindrical portion 211. A shaft 30 also extends inside the first cylindrical portion 211. The first cylindrical portion 211 rotatably supports the shaft 30 via the bearing members 7.

[0029] The second cylindrical portion 212 extends in the axial direction. The second cylindrical portion 212 is positioned radially outward relative to the first cylindrical portion 211. The second cylindrical portion 212 is positioned so as to surround the first cylindrical portion 211. The second cylindrical portion 212 is positioned radially apart from the first cylindrical portion 211.

[0030] The third cylindrical portion 213 extends in the axial direction. The third cylindrical portion 213 is positioned radially outward relative to the second cylindrical portion 212. The third cylindrical portion 213 is positioned to surround the second cylindrical portion 212. The third cylindrical portion 213 is positioned radially apart from the second cylindrical portion 212. The third cylindrical portion 213 is shorter in the axial direction than the second cylindrical portion 212.

[0031] The first connecting portion 214 connects the first cylindrical portion 211 and the second cylindrical portion 212. The shape of the first connecting portion 214 is not particularly limited. For example, the first connecting portion 214 may be an annular plate having a plurality of openings, or a plurality of arms extending in the radial direction. In this embodiment, however, it is an annular plate having a plurality of openings 216. The openings 216 extend in the circumferential direction.

[0032] The second connecting portion 215 connects the second cylindrical portion 212 and the third cylindrical portion 213. The shape of the second connecting portion 215 is not particularly limited. For example, the second connecting portion 215 may be an annular plate having a plurality of openings, or a plurality of arms extending in the radial direction. In this embodiment, however, it is an annular plate having a plurality of openings 217. The openings 217 extend in the circumferential direction.

[0033] The bottom surface of the stator frame 21 is formed by the first connecting portion 214 and the second connecting portion 215. The bottom surface of the stator frame 21 has a plurality of openings 216, 217. Air flows into the motor 100 through each of these openings 216, 217.

[0034] The stator core 22 is supported by the stator frame 21. The stator core 22 is positioned radially outward relative to the second cylindrical portion 212 of the stator frame 21. That is, the stator core 22 is positioned to surround the second cylindrical portion 212. The stator core 22 is supported by the second cylindrical portion 212. The stator core 22 is constructed by laminating multiple electromagnetic steel sheets.

[0035] The coil section 23 is wound around the stator core 22. More specifically, the coil section 23 is wound around the teeth of the stator core 22. An insulating layer (not shown) is interposed between the coil section 23 and the stator core 22.

[0036] <Rotor> Figure 2 is a cross-sectional perspective view of the rotor 3. Note that only two magnets 33 are shown in Figure 2, and the other magnets 33 are not shown. As shown in Figures 1 and 2, the rotor 3 is positioned on the second axial side relative to the stator 2. A propeller is attached to the rotor 3. The rotor 3 rotates integrally with the propeller. The rotor 3 has a shaft 30, a rotor frame 31, a yoke 32, a plurality of permanent magnets 33 (hereinafter simply referred to as "magnets"), and a plurality of nuts 34.

[0037] [Rotor frame] The rotor frame 31 is configured to support the shaft 30, the yoke 32, the magnet 33, and the nut 34. The rotor frame 31 is configured to rotate together with the shaft 30, the yoke 32, the magnet 33, and the nut 34. The rotor frame 31 is rotatably supported by the stator 2. In detail, the rotor frame 31 is supported by the stator 2 via the shaft 30 and the bearing member 7.

[0038] The rotor frame 31 rotates together with the shaft 30. The rotor frame 31 is formed from a separate component from the shaft 30, but it may also be integrally constructed from a single component with respect to the shaft 30. The rotor frame 31 has a top plate portion 311, a plurality of ribs 312, a cylindrical portion 313, a plurality of positioning pins 314, and a protruding portion 316.

[0039] The rotor frame 31 is made of resin. Specifically, the top plate portion 311, the cylindrical portion 313, the multiple positioning pins 314, and the protruding portion 316 are integrally formed from resin. The rotor frame 31 is made of fiber-reinforced plastic (FRP). That is, the rotor frame 31 contains resin and fibers. Examples of resins that make up the rotor frame 31 include thermoplastic resins. The rotor frame 31 may also be made of thermosetting resins. Examples of fibers included in the rotor frame 31 include glass fibers, carbon fibers, and cellulose fibers.

[0040] The top plate portion 311 is disc-shaped. The top plate portion 311 defines the upper surface of the motor 100. The top plate portion 311 extends perpendicular to the axial direction. The top plate portion 311 has a central portion 311a, an inclined portion 311b, and an opening 311c.

[0041] The central portion 311a is thicker than the other parts of the top plate portion 311. The shaft 30 and nut 34 are embedded in the central portion 311a. The multiple fibers contained in the central portion 311a are randomly oriented. That is, the multiple fibers contained in the central portion 311a are oriented in various directions, such as radially and axially. More than 60% of the multiple fibers contained in the central portion 311a are not oriented in the same direction.

[0042] On the other hand, the multiple fibers in the top plate portion 311, excluding the central portion 311a, are oriented radially. However, it is not necessary for all of the multiple fibers in the top plate portion 311, excluding the central portion 311a, to be oriented radially; it is preferable that 60% or more of the multiple fibers are oriented radially.

[0043] The inclined portion 311b constitutes the outer periphery of the top plate portion 311. The inclined portion 311b is an annular shape extending in the circumferential direction. The inclined portion 311b is inclined such that its inner circumferential end is positioned on a second axial side relative to its outer circumferential end. The surface of the inclined portion 311b facing the second axial side faces the second axial side and also faces radially outward. The surface of the inclined portion 311b facing the first axial side faces the first axial side and also faces radially inward.

[0044] Each opening 311c is formed in the inclined portion 311b. Each opening 311c is spaced apart from one another in the circumferential direction. Each opening 311c is composed of multiple slits. Each slit may extend radially or circumferentially.

[0045] Each opening 311c is positioned to overlap with each coil section 23 in an axial view. However, each opening 311c does not overlap with the yoke 32 and the magnet 33 in a radial view. Each opening 311c is positioned on the second axial side relative to the yoke 32 and the magnet 33.

[0046] Each rib 312 is provided on the surface of the top plate portion 311 facing the first axial side. That is, each rib 312 is provided on the lower surface of the top plate portion 311. Each rib 312 extends radially. More specifically, each rib 312 extends from the central portion 311a to the cylindrical portion 313. That is, each rib 312 extends radially on the top plate portion 311. Each rib 312 is spaced apart from each other in the circumferential direction. That is, the multiple ribs 312 extend radially around the axis of rotation O. The multiple fibers contained in the rib 312 are oriented radially. It is not necessary for all of the multiple fibers contained in the rib 312 to be oriented radially; it is preferable that 60% or more of the multiple fibers are oriented radially.

[0047] The cylindrical portion 313 extends from the outer peripheral end of the top plate portion 311 toward the first axial direction. The cylindrical portion 313 is positioned radially outward relative to the stator 2. More specifically, the cylindrical portion 313 is positioned radially outward relative to the stator core 22. The cylindrical portion 313 surrounds the stator core 22. The cylindrical portion 313 of the rotor 3 and the third cylindrical portion 213 of the stator 2 define the outer peripheral surface of the motor 100. The cylindrical portion 313 can hold the yoke 32.

[0048] The positioning pins 314 extend from the outer peripheral end of the top plate portion 311 toward the first axial direction. The positioning pins 314 are positioned radially inward relative to the cylindrical portion 313. The positioning pins 314 are spaced radially apart from the cylindrical portion 313. Each positioning pin 314 is spaced apart from the others in the circumferential direction. Preferably, each positioning pin 314 is arranged at equal intervals in the circumferential direction.

[0049] The positioning pin 314 is rectangular in shape. The positioning pin 314 is shorter than the cylindrical portion 313. That is, the tip of the positioning pin 314 is located second axially from the tip of the cylindrical portion 313. The positioning pin 314 is spaced apart from the stator 2 in the radial direction.

[0050] The protrusion 316 projects from the top plate portion 311 to a second axial direction. More specifically, the protrusion 316 projects from the central portion 311a of the top plate portion 311 to a second axial direction. The protrusion 316 is positioned to overlap with the shaft 30 in an axial view. The protrusion 316 is cylindrical. This protrusion 316 allows for the positioning of the propeller.

[0051] [shaft] The shaft 30 extends from inside the top plate portion 311 to the first axial direction. That is, the base end of the shaft 30 is embedded in the top plate portion 311. The shaft 30 is arranged to rotate integrally with the rotor frame 31.

[0052] The shaft 30 has an embedded portion 301 and a shaft body portion 302. The embedded portion 301 is the part of the shaft 30 that is embedded inside the top plate portion 311. The surface of the embedded portion 301 is knurled. Alternatively, the surface of the embedded portion 301 may be grooved instead of knurled, or it may be processed with both knurling and grooving. The groove is formed in an annular shape along the outer circumferential surface of the embedded portion 301.

[0053] The shaft body portion 302 is the part that extends from the top plate portion 311 in the first axial direction. In other words, the shaft body portion 302 is not embedded in the top plate portion 311, but is exposed from the top plate portion 311.

[0054] [yoke] The yoke 32 is cylindrical. The yoke 32 extends in the axial direction. In the radial direction, the yoke 32 is positioned between the cylindrical portion 313 and each positioning pin 314. The yoke 32 is clamped between the cylindrical portion 313 and each positioning pin 314. That is, a portion of the yoke 32 is embedded in the rotor frame 31. In detail, the axial second side portion of the yoke 32 is clamped between the cylindrical portion 313 and the positioning pin 314.

[0055] The outer circumferential surface of the yoke 32 is entirely covered by the cylindrical portion 313. That is, the first axial end of the cylindrical portion 313 is in the same axial position as the first axial end of the yoke 32, or is located on the first axial side relative to the first axial end of the yoke 32.

[0056] The length of the yoke 32 is longer than the length of the positioning pin 314. That is, the first axial end of the yoke 32 is located on the first axial side relative to the first axial end of the positioning pin 314. Note that the lengths of the yoke 32 and the positioning pin 314 refer to their axial dimensions.

[0057] The inner surface of the yoke 32 has a rougher surface in the portion facing the magnet 33 compared to the portion facing the positioning pin 314. Note that surface roughness refers to the arithmetic mean roughness. This improves the adhesion of the magnet 33 when it is bonded to the yoke 32.

[0058] [magnet] The magnets 33 are supported by the rotor frame 31 and the yoke 32. More specifically, the magnets 33 are positioned between a pair of adjacent positioning pins 314 in the circumferential direction. This allows the magnets 33 to be positioned in the circumferential direction. That is, each magnet 33 is spaced apart from the others in the circumferential direction. The magnets 33 and positioning pins 314 are arranged alternately in the circumferential direction.

[0059] The magnet 33 is attached to the inner circumferential surface of the yoke 32. For example, the magnet 33 is fixed to the yoke 32 by adhesive or the like. The magnet 33 is positioned radially outward from the stator 2. That is, the magnet 33 is positioned to surround the stator 2. The magnet 33 is positioned radially apart from the stator 2.

[0060] Figure 3 shows the details of the positioning structure of the magnet 33. As shown in Figure 3, the rotor frame 31 has a plurality of contact portions 315. The contact portions 315 are integrally formed with the top plate portion 311. The contact portions 315 are positioned between a pair of adjacent positioning pins 314 in the circumferential direction. The contact portions 315 are spaced apart from each positioning pin 314 in the circumferential direction. The contact portions 315 protrude from the top plate portion 311 to the first axial side. The contact portions 315 are shorter than the positioning pins 314 in the axial direction. The contact portions 315 are in contact with the magnet 33 in the axial direction. That is, the magnet 33 is positioned in the space defined by the contact portions 315 and the pair of positioning pins 314.

[0061] The magnet 33 has a contact surface 331 and a pair of non-contact surfaces 332 on the surface facing the second side in the axial direction. The contact surface 331 is the portion of the surface facing the second side in the axial direction that faces the contact portion 315. The non-contact surfaces 332 are the portions of the surface facing the second side in the axial direction that do not face the contact portion 315. In this way, the magnet 33 comes into contact with the contact portion 315 only at the contact surface 331.

[0062] [nut] As shown in Figures 1 and 2, the nut 34 is embedded in the top plate portion 311. More specifically, the nut 34 is embedded in the central portion 311a of the top plate portion 311. A portion of the nut 34 protrudes from the top plate portion 311 to the second axial side. The amount of protrusion of the nut 34 is, for example, less than 1 mm, and more specifically, about 0.05 to 0.2 mm. The nut 34 is a flange nut. A flange is formed on the first axial end of the nut 34. The nut 34 may have a groove machined on its outer circumferential surface. In this case, the nut 34 may or may not have a flange. The groove is formed in an annular shape along the outer circumferential surface of the nut 34. The nut 34 does not have to protrude to the second axial side.

[0063] The propeller is attached to the rotor frame 31 by screwing a bolt (not shown) into this nut 34. In other words, the propeller is fastened to the rotor frame 31 by the bolt. The propeller rotates together with the rotor frame 31. As the propeller rotates, the air inside the motor 100 is exhausted from the first axial side to the second axial side and finally radially outward.

[0064] The shaft 30, rotor frame 31, yoke 32, and nut 34 can be integrally formed by insert molding. That is, by setting insert parts such as the shaft 30, yoke 32, and nut 34 into a mold and filling it with resin, a rotor frame 31 with the shaft 30, yoke 32, and nut 34 inserted can be formed. The rotor 3 is then formed by placing each magnet 33 between a pair of positioning pins 314 on the insert product formed in this way and fixing it to the yoke 32 with an adhesive or the like.

[0065] [Differentiation] Although embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications are possible without departing from the spirit of the invention. Furthermore, the following modifications can basically be applied simultaneously.

[0066] (a) In the above embodiment, the shaft 30 extends from inside the top plate portion 311, but the shaft 30 may pass through the top plate portion 311. The shaft 30 may be fitted into the through hole formed in the top plate portion 311 after the rotor frame 31 having a through hole has been created.

[0067] (b) In the above embodiment, the outer circumferential surface of the yoke 32 was entirely covered by the cylindrical portion 313, but the configuration of the rotor 3 is not limited thereto. For example, a part of the outer circumferential surface of the yoke 32 may not be covered by the cylindrical portion 313 and may be exposed radially outward. More specifically, only the second axial side portion of the outer circumferential surface of the yoke 32 may be covered by the cylindrical portion 313, and the first axial side portion of the outer circumferential surface of the yoke 32 may not be covered by the cylindrical portion 313. That is, the first axial side end of the cylindrical portion 313 may be located on the second axial side relative to the first axial side end of the yoke 32.

[0068] (c) In the above embodiment, the positioning pin 314 is shorter than the yoke 32, but the configuration of the positioning pin 314 is not limited thereto. For example, the positioning pin 314 may be the same length as the yoke 32, or it may be longer than the yoke 32.

[0069] (d) In the above embodiment, the positioning pin 314 had the same width from the base to the tip in the axial direction, but the configuration of the positioning pin 314 is not limited to this. For example, as shown in Figure 4, the positioning pin 314 has a first portion 314a and a second portion 314b. The first portion 314a is the portion located on the first side in the axial direction. The second portion 314b is the portion located on the second side in the axial direction.

[0070] The width of the first portion 314a gradually decreases toward the first side in the axial direction. That is, a draft angle is formed on the portion that contacts the first portion 314a in the mold forming the rotor frame 31. The draft angle is, for example, about 1 degree. On the other hand, the width of the second portion 314b is constant in the axial direction. That is, no draft angle is formed on the portion that contacts the second portion 314b in the mold forming the rotor frame 31. A release agent is applied to this portion that contacts the second portion 314b. Note that the width of the positioning pin 314 refers to the circumferential dimension.

[0071] (e) In the above embodiment, each opening 311c formed in the top plate portion 311 is composed of a plurality of slits, but the configuration of the opening 311c is not limited thereto. For example, the opening 311c may be rectangular or circular.

[0072] (f) The top plate portion 311 may have grooves in the portion of its upper surface (the surface facing the second side in the axial direction) that overlaps with the rib 312 in an axial view.

[0073] (g) In the above embodiment, the propeller was a separate component from the top plate portion 311, but the propeller may be integrally formed with the top plate portion 311. [Explanation of symbols]

[0074] 2: Status 3: Rotor 30: Shaft 301: Embedded part 302: Shaft body 31: Rotor frame 311: Top panel 311a: central part 313: Cylindrical section 314: Positioning pin 315: Contact part 32: York 33: Magnet 34: Nut 100: Motor

Claims

1. A rotor frame having a top plate portion, a cylindrical portion extending from the outer peripheral end of the top plate portion to a first axial direction, and a plurality of positioning pins extending from the top plate portion to the first axial direction and arranged radially inward of the cylindrical portion, and spaced apart from each other in the circumferential direction, A yoke positioned radially between the cylindrical portion and the positioning pin, A plurality of magnets arranged between each of the positioning pins, A rotor equipped with a rotor.

2. The top plate portion, the cylindrical portion, and each positioning pin are integrally formed from resin. The rotor according to claim 1.

3. The rotor frame is formed of fiber-reinforced plastic. The rotor according to claim 1.

4. The multiple fibers contained in the central part of the top plate are randomly oriented, Multiple fibers contained in the portion of the top plate excluding the central part are oriented radially. The rotor according to claim 3.

5. The above-mentioned top plate portion further comprises a shaft extending from the inside to the first axial direction. The rotor according to claim 1.

6. The aforementioned shaft is An embedded portion embedded within the top plate portion, which has been processed with at least one of knurling and grooving, The shaft body portion extends axially from the top plate portion, Having, The rotor according to claim 5.

7. The rotor frame has a plurality of contact portions that contact each of the corresponding magnets in the axial direction, The contact portion is positioned between a pair of adjacent positioning pins in the circumferential direction, with a gap between each of the positioning pins. The rotor according to claim 1.

8. The above-mentioned top plate portion further includes a nut embedded within it. The rotor according to claim 1.

9. The nut has a portion that protrudes from the top plate portion to the second axial side. The rotor according to claim 8.

10. The positioning pin is shorter than the cylindrical portion. The rotor according to claim 1.

11. The rotor frame is integrally formed with the yoke by insert molding. The rotor according to claim 1.

12. A shaft extending from the inside of the top plate portion to the first side in the axial direction, A nut embedded in the top plate portion, Furthermore, The rotor frame is integrally formed with the yoke, the shaft, and the nut by insert molding. The rotor according to claim 1.

13. The positioning pin has a first portion located on the first axial side and a second portion located on the second axial side. The width of the first portion gradually decreases toward the first side in the axial direction. The width of the second portion is constant in the axial direction. The rotor according to claim 1.

14. The yoke is cylindrical, Of the inner circumferential surface of the yoke, the portion facing the magnet has a greater surface roughness than the portion facing the positioning pin. The rotor according to claim 1.

15. A rotor according to any one of claims 1 to 14, stator and, A motor equipped with a motor.

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