Rotor and motor

Abstract

To increase design flexibility. [Solution] The rotor according to the first embodiment comprises a rotor frame and an air-cooling member. The rotor frame has an opening. The air-cooling member has a ventilation section. The air-cooling member is installed inside the opening. The air-cooling member is configured as a separate component from the rotor frame.

Description

Technical Field

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

Background Art

[0002] The motor for drones disclosed in Patent Document 1 has a rotor and a stator. The rotor has a frame, a yoke, and a plurality of magnets. The frame has ventilation holes for cooling the inside of the motor. It is preferable that the ventilation holes are sized to prevent dust such as sand and debris from entering the inside of the motor.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of Invention

Problems to be Solved by the Invention

[0004] As described above, in a rotor having a rotor frame formed with ventilation holes, there is a demand for increasing the degree of design freedom. Accordingly, an object of the present invention is to provide a rotor that can increase the degree of design freedom.

Means for Solving the Problems

[0005] A rotor according to a first aspect includes a rotor frame and an air cooling member. The rotor frame has an opening. The air cooling member has a ventilation portion. The air cooling member is mounted inside the opening. The air cooling member is configured as a separate member from the rotor frame.

[0006] This configuration allows for greater design flexibility in the rotor because the ventilation is formed in a separate air-cooling component rather than the rotor frame. For example, a complex shape can be achieved by using a metal rotor frame to ensure strength while using a resin air-cooling component to improve the cooling effect. Furthermore, if the rotor frame and air-cooling component are made of the same material, the direction in which the ventilation opens must be the same as the molding direction of the rotor frame. On the other hand, by using separate components for the rotor frame and air-cooling component, the direction in which the ventilation opens can be different from the molding direction of the rotor frame.

[0007] The rotor according to the second embodiment is configured as follows in the rotor according to the first embodiment: The rotor frame is made of metal.

[0008] The rotor according to the third embodiment is configured as follows in the rotor according to the first or second embodiment: The air-cooling member is made of resin.

[0009] The rotor according to the fourth embodiment is configured as follows in the rotor according to any of the first to third embodiments: The air-cooling member has a top plate portion and an outer wall portion extending in the circumferential direction. The ventilation portion has a first ventilation opening. The first ventilation opening is formed in the outer wall portion. The first ventilation opening opens radially outward.

[0010] The rotor according to the fifth embodiment is configured as follows in the rotor according to the fourth embodiment. The first vent is formed across the outer wall portion and the top plate portion.

[0011] The rotor according to the sixth embodiment is configured as follows in the rotor according to the fourth or fifth embodiment: The first vent is a slit shape extending in the axial direction.

[0012] The rotor according to the seventh embodiment is configured as follows in the rotor according to any of the fourth to sixth embodiments: The outer wall portion protrudes toward the surface side of the rotor frame.

[0013] The rotor according to the eighth embodiment is configured as follows in the rotor according to any of the fourth to seventh embodiments: The ventilation section has a plurality of first ventilation openings. Each first ventilation opening is spaced apart in the circumferential direction.

[0014] The rotor according to the ninth embodiment is configured as follows in the rotor according to the eighth embodiment: The air-cooling member has a flow straightening section. The flow straightening section is formed on the inner surface of the outer wall. The flow straightening section is arranged between adjacent first vents in the circumferential direction.

[0015] The rotor according to the tenth embodiment is configured as follows in the rotor according to any of the fourth to ninth embodiments: The ventilation section has a second ventilation opening. The second ventilation opening opens in the circumferential direction.

[0016] The rotor according to the 11th embodiment is configured as follows in the rotor according to the 10th embodiment: The second vent is defined by the air cooling member and the rotor frame.

[0017] The rotor according to the 12th embodiment is configured as follows in the rotor according to the 10th or 11th embodiment: The air-cooling member has a third vent. The third vent opens in the circumferential direction. The third vent is positioned circumferentially inward from the second vent. The third vent is positioned axially away from the rotor frame from the second vent.

[0018] The rotor according to the 13th embodiment is configured as follows in the rotor according to any of the 4th to 9th embodiments: The air-cooling member has a third vent opening that faces circumferentially.

[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 air-cooling member has a top plate and fins. The fins extend radially on the back surface of the top plate.

[0020] A rotor according to a fifteenth aspect is configured as follows in the rotor according to the fourteenth aspect. The air cooling member has an outer wall portion extending in the circumferential direction. The ventilation portion has a first ventilation port. The first ventilation port is formed in the outer wall portion. The first ventilation port opens radially outward. The fin is connected to the outer wall portion.

[0021] A rotor according to a sixteenth aspect is configured as follows in the rotor according to the fifteenth aspect. The fin has a side surface facing in the circumferential direction. The side surface of the fin extends continuously with a surface facing in the circumferential direction among the surfaces defining the first ventilation port.

[0022] A rotor according to a seventeenth aspect is configured as follows in the rotor according to any one of the fourteenth to sixteenth aspects. The fin becomes thinner as it moves away from the top plate portion.

[0023] A rotor according to an eighteenth aspect is configured as follows in the rotor according to any one of the fourteenth to seventeenth aspects. The radially outer end portion of the fin has a lower height than the other portions of the fin.

[0024] A rotor according to a nineteenth aspect is configured as follows in the rotor according to any one of the first to eighteenth aspects. The rotor frame has a plurality of openings. The respective openings are arranged spaced apart from each other in the circumferential direction. The rotor includes a plurality of air cooling members.

[0025] A motor according to a twentieth aspect includes the rotor according to any one of the first to nineteenth aspects, and a stator. Effects of the Invention

[0026] According to the present invention, the degree of freedom in rotor design can be increased. Brief Description of the Drawings

[0027] [Figure 1] A plan view of the motor. [Figure 2] A cross-sectional view taken along line II-II in Figure 1. [Figure 3]Perspective view of the motor. [Figure 4] A perspective view of the rotor frame with the air-cooling components attached. [Figure 5] Perspective view of the air-cooling component. [Figure 6] Perspective view of the air-cooling component. [Figure 7] Cross-sectional view of the air-cooling component. [Figure 8] Plan view of an air-cooling component according to a modified example. [Modes for carrying out the invention]

[0028] The rotor 3 and motor 100 according to this embodiment will be described below with reference to the drawings. In the following description, the axial direction refers to the direction in which the rotation axis O of the rotor 3 extends. The circumferential direction refers to the circumferential direction of a circle centered on the rotation axis O, and the radial direction refers to the radial direction of a circle centered on the rotation axis O. In this embodiment, the first axial side refers to the lower side of Figure 2, and the second axial side refers to the upper side of Figure 2.

[0029] Figure 1 is a plan view of the motor 100, Figure 2 is a cross-sectional view taken along line II-II in Figure 1, and Figure 3 is a perspective view of the motor 100. As shown in Figures 1 to 3, the motor 100 has a stator 2 and a rotor 3. The motor 100 is a motor for a drone. More specifically, this motor 100 is used in an industrial drone. The motor 100 is configured to rotate the propeller (not shown) of the drone. The propeller is located on the second axial side of the motor 100. The rotation axis O of the motor 100 extends in the vertical direction. That is, in this embodiment, the axial direction means the vertical direction.

[0030] 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.

[0031] <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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] <Rotor> 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 includes a shaft 30, a rotor frame 31, a yoke 32, a plurality of permanent magnets 33 (hereinafter simply referred to as "magnets"), and an air-cooling member 34.

[0042] [Rotor frame] Figure 4 is a perspective view of the rotor frame 31 to which the air-cooling member 34 is attached. As shown in Figures 1 to 4, the rotor frame 31 is configured to support the shaft 30, the yoke 32, the magnet 33, and the air-cooling member 34. The rotor frame 31 is configured to rotate together with the shaft 30, the yoke 32, the magnet 33, and the air-cooling member 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.

[0043] 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, and a plurality of positioning pins 314.

[0044] The rotor frame 31 is made of metal. Specifically, the rotor frame 31 is made of an aluminum alloy, magnesium alloy, zinc alloy, or titanium alloy, etc. The rotor frame 31 is formed, for example, by die casting.

[0045] 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 an inclined portion 311a and an opening 311b.

[0046] The inclined portion 311a constitutes the outer periphery of the top plate portion 311. The inclined portion 311a is an annular shape extending in the circumferential direction. The inclined portion 311a is inclined such that its outer periphery end is positioned on the first axial side relative to its inner periphery end. The surface of the inclined portion 311a facing the second axial side faces the second axial side and also faces radially outward. The surface of the inclined portion 311a facing the first axial side faces the first axial side and also faces radially inward.

[0047] The openings 311b are formed in the inclined portion 311a. Each opening 311b is spaced apart from the others in the circumferential direction. The openings 311b extend in the circumferential direction.

[0048] Each opening 311b is positioned to overlap with each coil portion 23 in an axial view. However, each opening 311b does not overlap with the yoke 32 and the magnet 33 in a radial view. Each opening 311b is positioned on the second axial side with respect to the yoke 32 and the magnet 33.

[0049] Each rib 312 is provided on the back surface of the top plate portion 311. That is, each rib 312 is provided on the surface of the top plate portion 311 facing the first axial side. Each rib 312 extends radially. More specifically, each rib 312 extends from the central portion to the cylindrical portion 313. That is, each rib 312 extends radially on the back surface of the top plate portion 311. Each rib 312 is spaced apart from one another in the circumferential direction. That is, the multiple ribs 312 extend radially around the axis of rotation O.

[0050] 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 yoke 32 can be held by this cylindrical portion 313.

[0051] The positioning pins 314 extend from the outer peripheral end of the top plate portion 311 toward the first axial direction. More specifically, the positioning pins 314 extend from the cylindrical portion 313 toward the first axial direction. Each positioning pin 314 is spaced apart from one another in the circumferential direction. Preferably, each positioning pin 314 is arranged at equal intervals in the circumferential direction.

[0052] The positioning pin 314 is rectangular in shape. The positioning pin 314 is positioned at a distance from the stator 2 in the radial direction.

[0053] [shaft] The shaft 30 extends from the top plate portion 311 to the first axial direction. The shaft 30 is arranged to rotate integrally with the rotor frame 31.

[0054] [yoke] The yoke 32 is cylindrical. The yoke 32 extends in the axial direction. In the radial direction, the yoke 32 is positioned radially outward relative to the cylindrical portion 313. The yoke 32 covers the outer circumferential surface of the cylindrical portion 313. The length of the yoke 32 is longer than the length of the cylindrical portion 313. The axial first side end of the yoke 32 is located axially first relative to the axial first side end of the cylindrical portion 313.

[0055] The length of the yoke 32 is longer than the length of the positioning pin 314. 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, the cylindrical portion 313, and the positioning pin 314 refer to their axial dimensions.

[0056] The yoke 32 is bonded to the cylindrical portion 313. The portion of the inner circumferential surface of the yoke 32 that faces the cylindrical portion 313 is bonded to the outer circumferential surface of the cylindrical portion 313. The yoke 32 and the third cylindrical portion 213 of the stator 2 define the outer circumferential surface of the motor 100.

[0057] [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.

[0058] 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.

[0059] [Air-cooling components] The air-cooling member 34 is installed within the opening 311b of the rotor frame 31. For example, the air-cooling member 34 may be fixed to the rotor frame 31 by adhesive, or it may be fixed to the rotor frame 31 by fitting into the opening 311b.

[0060] The air-cooling member 34 is constructed as a separate component from the rotor frame 31. The air-cooling member 34 is made of resin. Specifically, the air-cooling member 34 is made of fiber-reinforced plastic (FRP). That is, the air-cooling member 34 contains resin and fibers. Examples of resins that make up the air-cooling member 34 include thermoplastic resins. However, the air-cooling member 34 may also be made of thermosetting resins. Examples of fibers included in the air-cooling member 34 include glass fibers, carbon fibers, and cellulose fibers. The air-cooling member 34 can be formed, for example, by injection molding.

[0061] Figures 5 and 6 are perspective views of the air-cooling member 34, and Figure 7 is a cross-sectional view of the air-cooling member 34 from the second axial side. As shown in Figures 5 to 7, the air-cooling member 34 has a plurality of first vents 341, a pair of second vents 342, and a pair of third vents 343. These first vents 341 to 343 are collectively referred to as the ventilation section. The air-cooling member 34 also has a top plate 344, an outer wall 345, a plurality of rectifier sections 346, and fins 347.

[0062] The top plate portion 344 of the air-cooling member 34 defines a part of the upper surface of the motor 100. The outer wall portion 345 extends from the outer peripheral end of the top plate portion 344 toward the first axial direction. The outer wall portion 345 also extends in the circumferential direction. The outer peripheral end of the top plate portion 344 may be inclined to face toward the second axial direction and radially outward.

[0063] A portion of the outer wall portion 345 is exposed to the outside of the motor 100. More specifically, a portion of the outer wall portion 345 is exposed radially outward from the rotor frame 31. A portion of the outer wall portion 345 protrudes from the rotor frame 31 to the second axial side. That is, a portion of the outer wall portion 345 protrudes toward the surface side of the rotor frame 31. The surface of the rotor frame 31 is the surface facing the outside of the motor 100, and the back surface of the rotor frame 31 is the surface facing the inside of the motor 100. The outer wall portion 345 is positioned radially inward from the outer edge of the top plate portion 311 of the rotor frame 31.

[0064] The first ventilation opening 341 is formed in the outer wall portion 345. The first ventilation opening 341 opens radially outward. Each of the first ventilation openings 341 is spaced apart from one another in the circumferential direction. The first ventilation opening 341 has a slit shape that extends in the axial direction.

[0065] The first vent 341 is also formed in the top plate portion 344. That is, the first vent 341 is formed across the outer wall portion 345 and the top plate portion 344. Therefore, the first vent 341 opens radially outward and also opens axially toward the second side. The portion of the first vent 341 formed in the outer wall portion 345 is longer than the portion formed in the top plate portion 344. The portion of the first vent 341 formed in the top plate portion 344 is positioned so as not to overlap with the coil portion 23 in an axial view. That is, the portion of the first vent 341 formed in the top plate portion 344 is positioned radially outward relative to the coil portion 23.

[0066] The pair of second vents 342 open in the circumferential direction. The pair of second vents 342 open in opposite directions to each other. That is, of the pair of second vents 342, the second vent 342 located on one side in the circumferential direction opens to that side in the circumferential direction, and the second vent 342 located on the other side in the circumferential direction opens to the other side in the circumferential direction.

[0067] The second vent 342 is defined by the cooling member 34 and the rotor frame 31. In other words, the second vent 342 is formed by the gap between the cooling member 34 and the rotor frame 31 that is created when the cooling member 34 is attached to the rotor frame 31.

[0068] The pair of third vents 343 open in the circumferential direction. The pair of third vents 343 open in opposite directions to each other. That is, of the pair of third vents 343, the third vent 343 located on one side in the circumferential direction opens to that side in the circumferential direction, and the third vent 343 located on the other side in the circumferential direction opens to the other side in the circumferential direction.

[0069] The third vent 343 is positioned circumferentially inward relative to the second vent 342. The third vent 343 is spaced apart from the second vent 342 in the circumferential direction. The third vent 343 is positioned on the second axial side relative to the second vent 342. That is, the third vent 343 is positioned axially away from the rotor frame 31 relative to the second vent 342. In a circumferential view, the third vent 343 is positioned so as not to overlap with the second vent 342.

[0070] The rectifier section 346 is formed on the inner surface of the outer wall section 345. The rectifier section 346 is positioned between adjacent first vents 341 in the circumferential direction. The inner surface of the outer wall section 345 refers to the surface of the outer wall section 345 facing radially inward.

[0071] The rectifier section 346 is configured to direct the airflow inside the motor 100 outwards through the first vent 341. The rectifier section 346 protrudes radially inward from the inner surface of the outer wall section 345. The rectifier section 346 extends in the axial direction. The rectifier section 346 has approximately the same axial length as the first vent 341.

[0072] The thickness of the rectifier section 346 gradually decreases toward the radially inward direction. Note that the thickness of the rectifier section 346 refers to the circumferential dimension. The radially inward surface of the rectifier section 346 is a curved surface. Specifically, the radially inward surface of the rectifier section 346 is arc-shaped when viewed in the axial direction. Note that the radially inward surface of the rectifier section 346 may be triangular when viewed in the axial direction.

[0073] The fins 347 extend radially along the back surface of the top plate portion 344 of the air-cooling member 34. The back surface of the top plate portion 344 is the surface facing the inside of the motor 100. The front surface of the top plate portion 344 is the surface facing the outside of the motor 100. The back surface of the top plate portion 344 faces the first axial side, and the front surface of the top plate portion 344 faces the second axial side.

[0074] The fin 347 is connected to the outer wall portion 345. The circumferentially facing side surface of the fin 347 extends continuously with the circumferentially facing surface that defines the first vent 341. Therefore, the air that collides with the side surface of the fin 347 as the rotor 3 rotates flows radially outward along the side surface of the fin 347 and is smoothly discharged to the outside of the motor 100 through the first vent 341.

[0075] The thickness of the fin 347 decreases as it moves away from the top plate portion 344. That is, the thickness of the fin 347 gradually decreases toward the first axial direction. Note that the thickness of the fin 347 may be constant. Here, the thickness of the fin 347 is the dimension of the fin 347 in the circumferential direction.

[0076] The radially outer end of fin 347 is lower in height than the rest of fin 347. This avoids interference with the coil section 23. The height of fin 347 is higher than the height of the rib 312 of the rotor frame 31. Note that the heights of fin 347 and rotor frame 31 refer to their respective axial dimensions.

[0077] The fin 347 is sandwiched between multiple first vents 341 in the circumferential direction. That is, the first vents 341 are located on both sides of the fin 347 in the circumferential direction. This allows the fin 347 to function regardless of the direction in which the rotor 3 rotates in the circumferential direction.

[0078] [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.

[0079] (a) The number of openings 311b in the rotor frame 31 is not limited to that of the above embodiment; for example, there may be one opening 311b. In this case, the opening 311b may be an annular shape extending in the circumferential direction.

[0080] (b) In the above embodiment, the air-cooling member 34 has first to third vents 341 to 343 as ventilation parts, but the ventilation parts of the air-cooling member 34 are not limited thereto. For example, the air-cooling member 34 may have only first and second vents 341, 342, or only first vent 341, or only first and third vents 341, 343 as ventilation parts. Also, the air-cooling member 34 may have a plurality of first vents 341, or only one first vent 341.

[0081] (c) In the above embodiment, the first vent 341 is a slit shape extending in the axial direction, but the shape of the first vent 341 is not limited thereto. For example, the first vent 341 may extend in the circumferential direction. In this case, each of the first vents 341 may be spaced apart from each other in the axial direction.

[0082] (d) In the above embodiment, the protrusion amount of the rectifier portion 346 was the same for all of them, but the configuration of the rectifier portion 346 is not limited to this. For example, the protrusion amount of the rectifier portion 346 closer to the fin 347 may be larger. Alternatively, the protrusion amount of the rectifier portion 346 further from the fin 347 may be larger. Note that the protrusion amount of the rectifier portion 346 refers to the dimension of the rectifier portion 346 in the radial direction. The air cooling member 34 does not have to have a rectifier portion 346.

[0083] (e) In the above embodiment, each cooling member 34 was independent of the others, but the configuration of the cooling members 34 is not limited thereto. For example, as shown in Figure 8, each cooling member 34 may be connected to adjacent cooling members 34 in the circumferential direction via a connecting portion 348. Also, it is not necessary for all cooling members 34 to be connected, and multiple cooling members 34 may be connected together.

[0084] (f) In the above embodiment, the rotor frame 31 and the air cooling member 34 were made of different materials, but the rotor frame 31 and the air cooling member 34 may be made of the same material. For example, the rotor frame 31 and the air cooling member 34 may both be made of an aluminum alloy.

[0085] (g) In the above embodiment, the first vents 341 are arranged on both sides of the fin 347 in the circumferential direction, but the position of the fin 347 is not limited thereto. For example, if the motor 100 rotates in only one direction in the circumferential direction, the first vents 341 may be arranged on only one direction in the circumferential direction relative to the fin 347. [Explanation of symbols]

[0086] 2: Status 3: Rotor 31: Rotor frame 311: Top panel 311b: opening 34: Air-cooled components 341: First vent 342: Second vent 343: Third vent 344: Top panel 345: Exterior wall 346: Rectifier 347: Finn 100: Motor

Claims

1. A rotor frame having an opening, An air-cooling member having a ventilation section, mounted within the opening, and configured as a separate component from the rotor frame, A rotor equipped with a rotor.

2. The rotor frame is made of metal. The rotor according to claim 1.

3. The aforementioned air-cooling component is made of resin. The rotor according to claim 1.

4. The air-cooling member has a top plate portion and an outer wall portion extending in the circumferential direction. The ventilation portion has a first ventilation opening formed in the outer wall portion and opening radially outward. The rotor according to claim 1.

5. The first ventilation opening is formed across the outer wall portion and the top plate portion. The rotor according to claim 4.

6. The first vent has a slit shape that extends in the axial direction. The rotor according to claim 4.

7. The outer wall portion protrudes toward the surface side of the rotor frame, The rotor according to claim 4.

8. The rotor according to claim 4, wherein the ventilation portion has a plurality of first ventilation openings arranged at intervals in the circumferential direction.

9. The air-cooling member has a flow straightening section positioned on the inner surface of the outer wall portion between adjacent first vents in the circumferential direction. The rotor according to claim 8.

10. The ventilation section has a second ventilation opening that opens in the circumferential direction. The rotor according to claim 4.

11. The second vent is defined by the air-cooling member and the rotor frame. The rotor according to claim 10.

12. The air-cooling member has a third ventilation opening that is open in the circumferential direction, The third vent is positioned circumferentially inward from the second vent and axially away from the rotor frame relative to the second vent. The rotor according to claim 10.

13. The air-cooling member has a third vent opening that faces circumferentially. The rotor according to claim 4.

14. The air-cooling member has a top plate portion and fins extending radially on the back surface of the top plate portion. The rotor according to claim 1.

15. The air-cooling member has an outer wall portion that extends in the circumferential direction, The ventilation portion has a first ventilation opening formed in the outer wall portion and opening radially outward, The fin is connected to the outer wall portion. The rotor according to claim 14.

16. The fin has a side surface facing in the circumferential direction, The side surface of the fin extends continuously with the surface that faces circumferentially among the surfaces defining the first vent, The rotor according to claim 15.

17. The fins become thinner as they move away from the top plate. The rotor according to claim 14.

18. The radially outer end of the fin is lower in height compared to the other parts of the fin. The rotor according to claim 14.

19. The rotor frame has a plurality of openings that are spaced apart from each other in the circumferential direction, The rotor comprises a plurality of the aforementioned air-cooling members. The rotor according to claim 1.

20. A rotor according to any one of claims 1 to 19, stator and, A motor equipped with a motor.

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