WO2021176818A1 - ロータおよびロータの製造方法 - Google Patents
ロータおよびロータの製造方法 Download PDFInfo
- Publication number
- WO2021176818A1 WO2021176818A1 PCT/JP2020/048574 JP2020048574W WO2021176818A1 WO 2021176818 A1 WO2021176818 A1 WO 2021176818A1 JP 2020048574 W JP2020048574 W JP 2020048574W WO 2021176818 A1 WO2021176818 A1 WO 2021176818A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- shaft member
- diameter portion
- rotor core
- axial direction
- shaft
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 16
- 230000005540 biological transmission Effects 0.000 claims abstract description 57
- 230000002093 peripheral effect Effects 0.000 claims description 80
- 238000003466 welding Methods 0.000 claims description 27
- 238000005304 joining Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 17
- 238000002360 preparation method Methods 0.000 claims description 17
- 238000001816 cooling Methods 0.000 description 16
- 230000004048 modification Effects 0.000 description 15
- 238000012986 modification Methods 0.000 description 15
- 238000001514 detection method Methods 0.000 description 12
- 229910000975 Carbon steel Inorganic materials 0.000 description 4
- 239000010962 carbon steel Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000009751 slip forming Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000004323 axial length Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Images
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
- H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/003—Couplings; Details of shafts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
-
- 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
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/225—Detecting coils
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K24/00—Machines adapted for the instantaneous transmission or reception of the angular displacement of rotating parts, e.g. synchro, selsyn
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/083—Structural association with bearings radially supporting the rotary shaft at both ends of the rotor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
Definitions
- the present invention relates to a rotor and a method for manufacturing the rotor.
- a rotor having a shaft composed of a plurality of shaft members and a method for manufacturing the rotor are known.
- Such a rotor and a method for manufacturing the rotor are disclosed in, for example, Japanese Patent No. 6162020.
- the above-mentioned Japanese Patent No. 6162020 discloses a motor shaft that constitutes a rotor together with a motor core.
- This motor shaft is composed of a first member and a second member.
- the first member is fixed to the motor core.
- the first member also includes a hollow portion and a solid portion. Then, the end face of the hollow portion and the end face of the second member are joined in a state where the end face of the hollow portion of the first member and the end face of the second member are abutted against each other. Further, a spline groove is formed in the second member. Then, the driving force from the motor core is transmitted to the driving force transmission member via the first member, the joint portion between the first member and the second member, and the second member.
- the driving force (torque) from the motor core is the driving force via the first member, the joint portion between the first member and the second member, and the second member. It is transmitted to the transmission member. Therefore, it is considered that stress may be concentrated on the joint portion due to the inclusion of the joint portion in the driving force transmission path (torque transmission path). That is, it is considered that the stress is concentrated on the joint portion where the shape is complicated by welding or the like and the stress is relatively easily concentrated.
- the motor shaft (rotor) according to Japanese Patent No.
- the first member (first shaft member) and the second member are caused by joining the first member and the second member.
- the joint portion (joint portion) between the (second shaft member) and the first member and the second member becomes large.
- “larger size” is described as a concept that includes not only increasing the outer diameter dimension but also increasing the thickness (thickening).
- the present invention has been made to solve the above-mentioned problems, and one object of the present invention is a case where a first shaft member and a second shaft member are joined at a joint to form a shaft. Another object of the present invention is to provide a rotor capable of preventing the first shaft member, the second shaft member and the joint portion from becoming large in size while ensuring the mechanical strength of the shaft.
- the rotor in the first aspect of the present invention is integrally integrated with a cylindrical rotor core having a first end surface on one side in the axial direction and a second end surface on the other side in the axial direction.
- a rotating shaft is provided, and the shaft is arranged on one side in the axial direction with respect to the first large-diameter portion having a hollow shape arranged inside the rotor core in the radial direction and the first end surface of the rotor core, and has a first large-diameter portion.
- the outer diameter of at least a part of the first small diameter portion of the first shaft member and the outer diameter of at least a part of the second small diameter part of the second shaft member are smaller than the inner diameter of the rotor core.
- the first large-diameter portion of the first shaft member has a driving force transmission outer peripheral surface that abuts on the inner peripheral surface of the rotor core and transmits the driving force from the rotor core, and is the first shaft member.
- the small diameter portion is provided with a driving force transmission unit for transmitting the driving force transmitted from the rotor core via the outer peripheral surface of the driving force transmission to the driving force transmission member, and is provided on the other side in the axial direction of the first shaft member.
- the portion is provided with a joint portion to be joined to the second shaft member, and the joint portion is located on the other side in the axial direction with respect to the other end portion in the axial direction of the outer peripheral surface of the driving force transmission.
- "joining” is described as meaning a broad concept including not only welding and caulking joining but also pressure welding by shrink fitting, cold fitting, or the like.
- the shaft is configured to include the first shaft member and the second shaft member, and the first small diameter portion of the first shaft member is driven from the rotor core.
- a driving force transmitting unit for transmitting the force to the driving force transmitting member is provided.
- a joint portion to be joined to the other shaft member is provided on the other side portion in the axial direction of the first shaft member, and the joint portion is axially more than the end portion on the other side in the axial direction of the outer peripheral surface of the driving force transmission. Located on the other side.
- the joint portion is provided on the second shaft member, not on the drive force transmission path from the rotor core to the drive force transmission portion of the first shaft member, so that it is possible to prevent stress from concentrating on the joint portion. can. Therefore, it is not necessary to increase the size of the first shaft member, the second shaft member, and the joint portion as compared with the case where the joint portion is provided on the driving force transmission path. As a result, even when the first shaft member and the second shaft member are joined at the joint portion to form the shaft, the first shaft member, the second shaft member, and the joint portion are maintained while ensuring the mechanical strength of the shaft. Can be prevented from becoming large.
- the method for manufacturing a rotor in the second aspect of the present invention is a hollow first large diameter portion arranged inside the cylindrical rotor core in the radial direction and an axial direction from the first end surface on one side in the axial direction of the rotor core. It is integrated with the rotor core, which is arranged on one side and is formed continuously with the first large diameter portion, and has at least a first small diameter portion whose outer diameter is smaller than the inner diameter of the rotor core.
- the driving force transmitting portion for transmitting the driving force from the rotor core to the driving force transmitting member is provided in the first small diameter portion of the first shaft member.
- a joining step of joining the shaft member is provided.
- the joint portion is provided on the second shaft member, not on the drive force transmission path from the rotor core to the drive force transmission portion of the first shaft member, so that it is possible to prevent stress from concentrating on the joint portion. can. Therefore, it is not necessary to increase the size of the first shaft member, the second shaft member, and the joint portion as compared with the case where the joint portion is provided on the driving force transmission path. As a result, even when the first shaft member and the second shaft member are joined at the joint portion to form the shaft, the first shaft member, the second shaft member, and the joint portion are maintained while ensuring the mechanical strength of the shaft. It is possible to provide a method for manufacturing a rotor capable of preventing the size of the rotor from becoming large.
- first shaft member and the second shaft member are joined by welding, the number of parts of the rotor can be reduced as compared with the case where the first shaft member and the second shaft member are connected by a fastening member or the like. Can be done.
- the first shaft member and the second shaft member are joined at a joint to form a shaft as described above, the first shaft member is maintained while ensuring the mechanical strength of the shaft. , It is possible to prevent the second shaft member and the joint portion from becoming large in size.
- the configuration of the rotor 100 according to the present embodiment will be described with reference to FIGS. 1 to 4.
- the rotor 100 and the stator 101 form a rotary electric machine 102.
- the rotor 100 is connected to a driving force transmission member 103 provided on a driving force transmission path (power train) for transmitting a driving force between the rotary electric machine 102 and the load.
- the stator 101 includes a stator core 101a and a coil 101b.
- the stator core 101a has an annular shape.
- the coil 101b is arranged on the stator core 101a.
- the "axial direction” means a direction (Z1 direction or Z2 direction) along the rotation axis C1 of the rotor 100.
- the “circumferential direction” means the circumferential direction (A1 direction or A2 direction) of the rotor 100.
- the “diameter direction” means the radial direction of the rotor 100.
- the “diameter inside” means the R1 direction side in the drawing.
- the “diameter outside” means the R2 direction side in the drawing.
- “one side in the axial direction” means the side in the Z1 direction in the drawing.
- the other side in the axial direction means the side in the Z2 direction in the drawing.
- the rotor 100 includes a rotor core 1, a shaft 2, end plates 3a and 3b, bearing members 4a and 4b, a rotation position detection unit 5, and an oil supply unit 6 (see FIG. 3).
- the bearing member 4a is an example of the "first bearing member” in the claims.
- the bearing member 4b is an example of the "second bearing member” in the claims.
- the rotor core 1 is formed in an annular shape (cylindrical shape). Further, the rotor core 1 is arranged inside the stator core 101a in the radial direction. As shown in FIG. 2, the rotor core 1 is formed by laminating a plurality of electromagnetic steel sheets 1a in the axial direction. A permanent magnet (not shown) is arranged inside the rotor core 1.
- the laminated length of the rotor core 1 is L1.
- the laminated length L1 is the distance between the position P1 of the end face 11 on the Z1 direction side of the rotor core 1 in the Z direction and the position P2 of the end face 12 on the Z2 direction side of the rotor core 1 in the Z direction.
- the end face 11 and the end face 12 are examples of the "first end face" and the "second end face” in the claims, respectively.
- the rotor core 1 is configured to generate a driving force (torque) by interacting with a magnetic field generated by passing an electric current through the coil 101b of the stator 101. That is, the rotor core 1 generates a rotational force.
- the shaft 2 is a member that rotates around the rotation axis C1. Specifically, the shaft 2 is configured to rotate with respect to the stator 101 integrally with the rotor core 1, the end plates 3a and 3b, and the rotation position detecting unit 5.
- the shaft 2 is formed by joining the one shaft member 20 and the other shaft member 30 by a joint portion 40. That is, the shaft 2 is formed of a plurality of members.
- the one shaft member 20 and the other shaft member 30 are examples of the "first shaft member” and the "second shaft member” in the claims, respectively.
- the one-axis member 20 is arranged so as to extend inside the rotor core 1 in the radial direction and extend to one side in the axial direction of the rotor core 1.
- the one shaft member 20 (large diameter portion 22 described later) has a hollow shape.
- the one-axis member 20 is formed in a cylindrical shape penetrating along the rotation axis C1.
- the one shaft member 20 is made of, for example, carbon steel.
- the shaft member 20 is arranged from a position on the Z1 direction side of the axial center C2 of the rotor core 1 to the Z1 direction side of the rotor core 1.
- the axial length of the shaft member 20 is L2, which is larger than the length L1.
- the one-side shaft member 20 is fixed to the inner peripheral surface 13 of the rotor core 1.
- the diameter of the one shaft member 20 is increased, so that the gap between the one shaft member 20 and the rotor core 1 becomes smaller, and the one shaft member 20 becomes smaller.
- 20 is in a state of being fitted into the rotor core 1 (a state of being pressure-welded).
- the one shaft member 20 is pressed against the inner peripheral surface 13 of the one shaft member 20 by the hydroforming method in a state where the one shaft member 20 is arranged on the inner peripheral surface 13 of the rotor core 1.
- the "diameter expansion" means that the outer diameter is increased by expanding the member in the radial direction.
- the one-sided shaft member 20 includes a small-diameter portion 21 and a large-diameter portion 22 that are integrally (continuously) formed with each other. That is, the small diameter portion 21 and the large diameter portion 22 are continuously formed.
- the large diameter portion 22 is arranged inside the rotor core 1 in the radial direction.
- the small diameter portion 21 is arranged on one side in the axial direction (Z1 direction side) with respect to the end surface 11 of the rotor core 1.
- the inner diameter of the small diameter portion 21 is d11, and the outer diameter of the small diameter portion 21 is d12.
- the inner diameter d11 and the outer diameter d12 of the small diameter portion 21 are the inner diameters of the inner peripheral surface 21a and the outer peripheral surface 21b of the small diameter portion 21 corresponding to the axial position P3 where the bearing member 4a is arranged, respectively. And is described as meaning the outer diameter.
- the small diameter portion 21 is an example of the "first small diameter portion” in the claims.
- the large diameter portion 22 is an example of the "first large diameter portion" in the claims.
- the inner diameter of the large diameter portion 22 is d21, which is larger than the inner diameter d11 of the small diameter portion 21.
- the outer diameter of the large diameter portion 22 is d22, which is larger than the outer diameter d12 of the small diameter portion 21.
- the inner diameter d21 and the outer diameter d22 of the large diameter portion 22 are regions from the axial positions P1 to P2 in which the rotor core 1 of the inner peripheral surface 22a and the outer peripheral surface 22b of the large diameter portion 22 is arranged, respectively. It is described as meaning the inner diameter and outer diameter of the part corresponding to.
- the outer diameter d12 of the small diameter portion 21 is smaller than the inner diameter d51 of the rotor core 1.
- outer peripheral surface 22b is configured to abut on the inner peripheral surface 13 of the rotor core 1 and to transmit the driving force from the rotor core 1.
- the outer peripheral surface 22b is an example of the "driving force transmission outer peripheral surface" in the claims.
- the outer diameter of the tip portion 23 on the other side (Z2 direction side) of the large diameter portion 22 in the axial direction is d23.
- the small-diameter portion 21 has a driving force transmitting unit 21c for transmitting the driving force transmitted from the rotor core 1 to the driving force transmitting member 103 via the outer peripheral surface 22b of the large-diameter portion 22.
- the driving force transmitting portion 21c is configured as a spline (tooth portion or groove portion) formed on the inner peripheral surface 21a of the small diameter portion 21.
- the one shaft member 20 drives the driving force from the rotor core 1 by rotating both the one shaft member 20 and the driving force transmitting member 103 in a state where the driving force transmitting member 103 is fitted in the driving force transmitting portion 21c. It is configured to transmit to the force transmission member 103 (load side).
- the shaft member 20 is configured to transmit the rotational force from the driving force transmitting member 103 to the rotor core 1 when the energy is regenerated from the load side.
- the large diameter portion 22 is integrally formed on the Z2 direction side of the small diameter portion 21.
- a flange 22d is provided on the large diameter portion 22.
- the flange 22d is formed so as to project outward in the radial direction from the outer peripheral surface 22b of the large-diameter portion 22.
- the surface of the flange 22d on the Z2 direction side and the surface of the end plate 3a on the Z1 direction side face each other in the axial direction.
- the large diameter portion 22 is provided with a through hole 22e.
- the through hole 22e is arranged in a portion of the shaft member 20 on the Z1 direction side of the rotor core 1. Specifically, the through hole 22e is provided at a position on the Z1 direction side of the axial position P1 of the end surface 11 on the Z1 direction side of the rotor core 1. Further, the through hole 22e is formed so that a part of the flange 22d is penetrated in the radial direction.
- the through hole 22e has a function of circulating the cooling oil E in the radial direction.
- the cooling oil E is, for example, ATF (Automatic Transmission Fluid).
- ATF Automatic Transmission Fluid
- the cooling oil E is ejected into the shaft 2 from the oil supply unit 6 arranged inside the shaft 2.
- centrifugal force acts on the cooling oil E, so that a part of the cooling oil E is ejected from the through hole 31c described later of the other shaft member 30, and the ejected cooling oil E is ejected.
- the oil E reaches the portion of the stator 101 on the Z2 direction side (coil end portion of the coil 101b).
- FIG. 3 shows a state in which the cooling oil E is sprayed on the coil 101b on the right side of the paper surface, the cooling oil E is also sprayed on the coil 101b on the left side of the paper surface as the rotor 100 rotates. Be sprayed.
- the rotor core 1 is cooled by the cooling oil E flowing along the inner peripheral surface 22a of the one-sided shaft member 20. Then, the cooling oil E is ejected from the through hole 22e of the shaft member 20, and the ejected cooling oil E reaches the portion of the stator 101 on the Z1 direction side (coil end portion of the coil 101b). As a result, the cooling oil E cools the portion of the stator 101 on the Z1 direction side.
- the rotor core 1 is fixed to the outer peripheral surface 22b of the large diameter portion 22. That is, when the rotor 100 is manufactured, the rotor core 1 and the shaft 2 are fixed to each other by expanding the diameter of the large diameter portion 22 of the one shaft member 20 by the hydroforming method.
- a joint portion 40 to be joined to the other shaft member 30 is provided in the portion of the large diameter portion 22 on the Z2 direction side.
- the joint portion 40 is provided in the portion of the large-diameter portion 22 on the Z2 direction side of the end surface 12 on the Z2 direction side of the rotor core 1. Further, the joint portion 40 is located on the other side in the axial direction from the end portion on the other side (Z2 direction side) in the axial direction of the outer peripheral surface 22b of the large diameter portion 22.
- the other shaft member 30 is formed separately from the one shaft member 20 and is arranged on the Z2 direction side of the rotor core 1. Specifically, the other shaft member 30 (small diameter portion 31 and large diameter portion 32, which will be described later) is arranged on the Z2 direction side of the end surface 12 (position P2) on the Z2 direction side of the rotor core 1. On the other hand, the shaft member 30 is arranged so as to extend from the position on the Z2 direction side of the rotor core 1 toward the Z2 direction side. On the other hand, the axial length of the shaft member 30 is L3, which is smaller than the length L1 and smaller than the length L2.
- the other shaft member 30 is made of a material having a rigidity lower than the rigidity of the one shaft member 20.
- the other shaft member 30 is made of carbon steel like the one shaft member 20, while the carbon content of the other shaft member 30 is lower than the carbon content of the one shaft member 20.
- the other shaft member 30 has a hollow shape.
- the other shaft member 30 includes a small-diameter portion 31 and a large-diameter portion 32 integrally formed with each other. That is, the small diameter portion 31 and the large diameter portion 32 are continuously formed.
- the large diameter portion 32 is arranged on one side in the axial direction (Z1 direction side) with respect to the small diameter portion 31.
- the inner diameter of the small diameter portion 31 is d31
- the outer diameter of the small diameter portion 31 is d32.
- the inner diameter d31 and the outer diameter d32 of the small diameter portion 31 are the inner diameters of the inner peripheral surface 31a and the outer peripheral surface 31b of the small diameter portion 31 corresponding to the axial position P4 where the bearing member 4b is arranged, respectively. And is described as meaning the outer diameter.
- the small diameter portion 31 is an example of the "second small diameter portion” in the claims.
- the large diameter portion 32 is an example of the "second large diameter portion” in the claims.
- the inner diameter of the large diameter portion 32 is d41, which is larger than the inner diameter d31 of the small diameter portion 31.
- the outer diameter of the large diameter portion 32 is d42, which is larger than the outer diameter d32 of the small diameter portion 31.
- the inner diameter d41 of the large diameter portion 32 means the inner diameter of the end portion (or the vicinity of the end portion) on the Z1 direction side of the large diameter portion 32.
- the outer diameter d42 of the large diameter portion 32 is a portion of the large diameter portion 22 corresponding to the axial position P5 where the joint portion 40 is provided (the tip portion 33 of the large diameter portion 32 on the Z1 direction side). It is described as meaning the outer diameter of.
- the outer diameter d42 at the tip portion 33 on one side in the axial direction (Z1 direction side) of the large diameter portion 32 is larger than the outer diameter d32 of the small diameter portion 31, and the other side in the axial direction (Z2 direction side) of the large diameter portion 22. ) Is smaller than the outer diameter d23 at the tip portion 23. Further, the outer diameter d32 of the small diameter portion 31 is smaller than the inner diameter d51 of the rotor core 1.
- a through hole 31c for circulating the cooling oil E in the radial direction is provided in the small diameter portion 31 which is a portion of the other shaft member 30 on the Z2 direction side with respect to the rotor core 1.
- the through hole 31c is formed on the Z2 direction side of the axial position P5 of the joint portion 40.
- the outer peripheral surface 32a of the large diameter portion 32 and the inner peripheral surface 22a of the large diameter portion 22 of the one shaft member 20 are arranged so as to face each other in the radial direction. Further, at least a part of the outer peripheral surface 32a and at least a part of the inner peripheral surface 22a are joined (for example, welded) at the joint portion 40. Further, the inner peripheral surface 32b of the large diameter portion 32 of the other shaft member 30 and the inner peripheral surface 22a of the large diameter portion 22 of the one shaft member 20 are connected, and the cooling oil E is supplied from the other shaft member 30 side. On the other hand, the shaft 2 is configured so as to flow toward the shaft member 20 side.
- the joint portion 40 is formed by welding the inner peripheral surface 22a of the one shaft member 20 and the outer peripheral surface 32a of the other shaft member 30. Specifically, the outer peripheral surface 32a of the tip portion 33 on one side (Z1 direction side) of the large diameter portion 32 in the axial direction and the inner circumference of the tip portion 23 on the other side (Z2 direction side) of the large diameter portion 22 in the axial direction. The surface 22a is joined by welding. Specifically, the one shaft member 20 and the other shaft member 30 are provided at the axial position P5 where they overlap in the radial direction. For example, as shown in FIG. 4, the joint portion 40 is provided intermittently in a circumferential shape when viewed in the Z1 direction. For example, a plurality of joint portions 40 are provided at equal angular intervals when viewed in the Z1 direction. In FIG. 4, the bearing member 4b is not shown.
- the joint portion 40 is formed by melting a part of the one shaft member 20 and a part of the other shaft member 30 by heating and then hardening the joint portion 40.
- the joint portion 40 can be formed by various welding methods such as laser welding, electron beam welding, arc welding, and resistance welding.
- the end plate 3a is arranged on the end surface 11 on one side (Z1 direction side) of the rotor core 1 in the axial direction. Further, the end plate 3b is arranged on the end surface 12 on the other side (Z2 direction side) of the rotor core 1 in the axial direction. That is, the end plates 3a and 3b are arranged so as to sandwich the rotor core 1 from both sides in the axial direction.
- the end plates 3a and 3b are fixed to the shaft 2 (one shaft member 20), respectively. For example, the end plates 3a and 3b are caulked to the one shaft member 20.
- the end plate 3b is provided at a position different from the axial position P5 of the joint portion 40. Specifically, the end plate 3b is arranged at a position on the Z2 direction side of the end face 11 on the Z2 direction side of the rotor core 1 in the Z2 direction and at a position on the Z1 direction side of the axial position P5 of the joint portion 40. Has been done.
- the bearing member 4a and the rotation position detecting portion 5 are arranged on the small diameter portion 21 of the one shaft member 20. Further, the bearing member 4b is arranged on the small diameter portion 31 of the other shaft member 30.
- the bearing members 4a and 4b are configured to rotatably support the shaft 2 around the rotation shaft C1.
- the bearing member 4a is provided on the outer peripheral surface 21b of the one shaft member 20, and is arranged at a position where at least a part of the bearing member 4a overlaps with the driving force transmitting portion 21c when viewed in the radial direction.
- the bearing member 4a is arranged at the axial position P3 of the outer peripheral surface 21b of the small diameter portion 21.
- the bearing member 4b is formed on the Z2 direction side of the axial position P5 of the joint portion 40 of the small diameter portion 31.
- the rotation position detection unit 5 is provided on the rotor core 1 side (Z2 direction side) of the outer peripheral surface 21b of the small diameter portion 21 with respect to the axial position P3.
- the rotation position detection unit 5 is arranged at a position on the Z1 direction side of the end face 11 of the rotor core 1 of the one shaft member 20 with respect to the axial position P1.
- the rotation position detection unit 5 is provided on the outer peripheral surface 21b of the one shaft member 20, and is provided at a position where at least a part of the rotation position detection unit 5 overlaps with the driving force transmission unit 21c when viewed in the radial direction. There is.
- the rotation position detection unit 5 is configured to detect the rotation position of the rotor core 1.
- the rotation position detection unit 5 is configured as a resolver, for example. Specifically, the rotation position detection unit 5 is fixed to the shaft 2 as a rotor of the resolver. Then, it is configured to transmit rotational position information (signal) from the stator of the resolver to the outside according to the relative position between the stator of the resolver (not shown) arranged outside the rotor of the resolver in the radial direction and the rotor of the resolver. ing.
- the rotor 100 is manufactured by one shaft member preparation step (S1) for preparing one shaft member 20, the other shaft member preparation step (S2) for preparing the other shaft member 30, and one shaft.
- the driving force transmitting portion forming step (S3) for forming the driving force transmitting portion 21c on the small diameter portion 21 of the member 20 and the axially opposite side (Z2 direction side) portion of one shaft member 20 and the other shaft member 30 are joined.
- a joining step (S4) to be performed and a manufacturing step of the shaft 2 including the joining step (S4) are provided.
- the method for manufacturing the rotor 100 includes a fixing step (S5) for fixing the shaft 2 to the rotor core 1.
- the one-shaft member preparation step and the other shaft member preparation step are examples of the "first shaft member preparation step” and the "second shaft member preparation step” in the claims, respectively.
- one shaft member preparation process, the other shaft member preparation process, the driving force transmission portion forming process, and the joining process are performed in this order.
- the order of the steps is not limited to the above.
- the driving force transmitting portion forming step may be performed before the one-shaft member preparation step and the other shaft member preparation step, or may be performed after the joining step.
- the one shaft member preparation step may be performed after the other shaft member preparation step, or may be performed at the same time as the other shaft member preparation step.
- the fixing step (S5) is performed after the manufacturing steps (S1 to S4) of the shaft 2.
- the shaft 2 is fixed to the rotor core 1 by hydroforming.
- the first large diameter portion (22) of the first shaft member (20) is in contact with the inner peripheral surface (13) of the rotor core (1) and is from the rotor core (1). It has a driving force transmission outer peripheral surface (22b) to which the driving force of the above is transmitted. Then, to the first small diameter portion (21) of the first shaft member (20), the driving force transmitted from the rotor core (1) via the driving force transmission outer peripheral surface (22b) is transmitted to the driving force transmission member (103). A driving force transmission unit (21c) for transmission is provided. Further, a joint portion (40) to be joined to the second shaft member (30) is provided on the other side portion of the first shaft member (20) in the axial direction.
- the joint portion (40) is located on the other side in the axial direction with respect to the end portion on the other side in the axial direction of the outer peripheral surface (22b) for transmitting the driving force.
- the joint portion (40) is provided on the second shaft member (30), not on the driving force transmission path from the rotor core (1) to the driving force transmission portion (21c) of the first shaft member (20). Therefore, it is possible to prevent stress from concentrating on the joint portion (40). Therefore, it is not necessary to increase the size of the first shaft member (20), the second shaft member (30), and the joint portion (40) as compared with the case where the joint portion (40) is provided on the driving force transmission path. ..
- the joint portion (40) is arranged on the other side in the axial direction from the second end surface (12) of the rotor core (1).
- the entire driving force from the rotor core (1) is not the second shaft member (30) provided with the joint portion (40), but the driving force transmitting portion (21c) is provided. It can be transmitted to the uniaxial member (20).
- the first bearing member (4a) that supports the first shaft member (20) is arranged in the first small diameter portion (21) of the first shaft member (20).
- a second bearing member (4b) that supports the second shaft member (30) is arranged in the second small diameter portion (31) of the second shaft member (30).
- the second shaft member (30) is arranged on one side in the axial direction from the second small diameter portion (31) and is continuous with the second small diameter portion (31). It has a second large diameter portion (32) formed in. Further, the outer diameter (d42) of the tip portion (33) on one side in the axial direction of the second large diameter portion (32) is larger than the outer diameter (d32) of at least a part of the second small diameter portion (31). Moreover, it is smaller than the outer diameter (d23) of the tip portion (23) on the other side in the axial direction of the first large diameter portion (22).
- the peripheral surface (22a) is joined by welding.
- the other end face of the first shaft member (20) and the one end face of the second shaft member (30) and the thickness of the hollow first shaft member (20).
- the thickness of the hollow second shaft member (30) is relatively small, it is considered that the welding depth is relatively small. In this case, it is considered that the mechanical strength of the joint portion (40) is reduced.
- the joint portion (40) is formed with the inner peripheral surface (22a) at the tip portion (23) of the first large diameter portion (22) of the first shaft member (20). If it is formed by welding the outer peripheral surface (32a) of the tip portion (33) of the second large diameter portion (32) of the biaxial member (30), the direction of the welding depth is the first axial member (20). ) And the direction along the axial direction of the second shaft member (30). Therefore, even when the thickness of the first shaft member (20) and the thickness of the second shaft member (30) are relatively small, a sufficient welding depth can be secured. As a result, the mechanical strength of the joint portion (40) can be sufficiently ensured.
- the method for manufacturing the rotor (100) is the axial direction of the driving force transmission outer peripheral surface (22b) of the first large diameter portion (22) with respect to the other end in the axial direction.
- a joining step of joining the portion of the first shaft member (20) on the other side in the axial direction and the second shaft member (30) by welding is provided on the other side.
- the joint portion (40) is provided on the second shaft member (30), not on the driving force transmission path from the rotor core (1) to the driving force transmission portion (21c) of the first shaft member (20). Therefore, it is possible to prevent stress from concentrating on the joint portion (40).
- first shaft member (20) and the second shaft member (30) are joined by welding, when the first shaft member (20) and the second shaft member (30) are connected by a fastening member or the like.
- the number of parts of the rotor (100) can be reduced as compared with the above.
- the joint portion 40 is provided on the Z2 direction side of the end face 12 on the Z2 direction side of the rotor core 1, but the present invention is not limited to this.
- the joint portion 240 is provided on the Z1 direction side of the end surface 212 of the rotor core 201.
- a through hole 22e is provided in a portion of the one shaft member 20 on one side (Z1 direction side) of the rotor core 1 in the axial direction, and the through hole 22e is provided in the axial direction of the rotor core 1 of the other shaft member 30.
- An example in which the through hole 31c is provided on the other side (Z2 direction side) is shown, but the present invention is not limited to this.
- a through hole 22e is provided on one side (Z1 direction side) of the one shaft member 320 in the axial direction with respect to the rotor core 1, and the one shaft member is provided.
- a through hole 331c may be provided in a portion of 320 on the other side (Z2 direction side) of the rotor core 1 in the axial direction.
- the tip portion 423 on the other side in the axial direction (Z2 direction side) is joined by welding.
- the end surface 433a of the tip portion 433 of the large diameter portion 432 on the Z1 direction side and the end surface 423a of the tip portion 423 of the large diameter portion 422 on the Z2 direction side are joined.
- the outer diameter d433 of the tip portion 433 on one side in the axial direction of the large diameter portion 432 is larger than the outer diameter d431 of the small diameter portion 431 of the other shaft member 430, and the tip of the large diameter portion 422 on the other side in the axial direction.
- the joint portion 440 is provided on the other side in the axial direction with respect to the end surface 412 on the other side in the axial direction of the rotor core 1. Further, the joint portion 440 is provided on the other side in the axial direction from the through hole 431c of the rotor core 1.
- the one shaft member 420 and the other shaft member 430 are examples of the "first shaft member” and the “second shaft member” in the claims, respectively.
- the large-diameter portion 422 and the large-diameter portion 432 are examples of the "first large-diameter portion” and the "second large-diameter portion” in the claims, respectively.
- the small diameter portion 431 is an example of the “second small diameter portion” in the claims.
- the end face 412 is an example of the "second end face” in the claims.
- the tip portion 433 of the large diameter portion 432 of the other shaft member 430 and the tip portion 423 of the large diameter portion 422 of the one shaft member 420 are joined in the axial direction by welding, so that the joint portion 440 is joined.
- the outer diameter of the shaft 402 at the joint portion 440 can be reduced as compared with the case where the one shaft member 420 and the other shaft member 430 are joined adjacent to each other in the radial direction. As a result, the rotor 400 can be made smaller.
- the shaft 2 is composed of two members (one shaft member 20 and the other shaft member 30) is shown, but the present invention is not limited to this. That is, the shaft may be composed of three or more members.
- the rotor core is fixed to the member arranged on one side of the three or more members in the axial direction, and the driving force transmission unit is provided.
- the shaft 2 is configured so that each of the one shaft member 20 and the other shaft member 30 has a hollow shape is shown, but the present invention is not limited to this.
- the shaft 2 may be configured such that one or both of the one shaft member 20 and the other shaft member 30 have a solid shape.
- joint portion is formed by welding
- a portion in which the one shaft member 20 and the other shaft member 30 are pressure-welded by shrink fitting, cold fitting, or the like may be formed as a joint portion.
- the driving force transmission unit 21c is provided on the inner peripheral surface 21a, but the present invention is not limited to this. That is, the driving force transmission unit 21c may be provided on the outer peripheral surface 21b. In this case, the driving force transmission unit 21c is provided at an axial position different from the axial position of the bearing member 4a and the rotation position detection unit 5.
- the shaft may be configured so that the one shaft member has a constant inner diameter and outer diameter.
- the rotation position detection unit 5 is provided on the Z2 direction side with respect to the bearing member 4a
- the present invention is not limited to this. That is, the rotation position detection unit 5 may be provided on the Z1 direction side with respect to the bearing member 4a.
- end plates 3a and 3b may be fixed to the rotor core 1 by welding or caulking.
- the shaft 2 may or may not be provided with only one of the through holes 22e and 31c.
- one shaft member 20 and the other shaft member 30 are made of carbon steel
- the present invention is not limited to this. That is, at least one of the one shaft member 20 and the other shaft member 30 may be made of a member other than carbon steel (for example, stainless steel or aluminum).
- the other shaft member 30 is made of a material having a rigidity lower than the rigidity of the one shaft member 20
- the present invention is not limited to this. That is, the other shaft member 30 may be made of a material having a rigidity equal to or higher than the rigidity of the one shaft member 20.
- the joint portions 40 are formed intermittently at equal angular intervals when viewed in the Z1 direction, but the present invention is not limited to this. That is, the joint portion 40 may be continuously formed in an arc shape when viewed in the Z1 direction.
- the shaft 2 is configured so that the axial position of the end plate 3b and the axial position of the joint portion 40 are different from each other is shown, but the present invention is not limited to this. That is, the shaft may be configured so that the axial position of the end plate and the axial position of the joint portion are the same (overlap in the radial direction).
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Description
図1~図4を参照して、本実施形態によるロータ100の構成について説明する。ロータ100は、ステータ101と共に、回転電機102を構成する。また、ロータ100は、回転電機102と負荷との間において、駆動力を伝達する駆動力伝達経路(パワートレイン)上に設けられた駆動力伝達部材103に接続されている。ステータ101は、ステータコア101aと、コイル101bとを含む。ステータコア101aは、円環状を有する。コイル101bは、ステータコア101aに配置されている。
図1に示すように、ロータコア1は、円環状(円筒状)に形成されている。また、ロータコア1は、ステータコア101aの径方向内側に配置されている。図2に示すように、ロータコア1は、複数の電磁鋼板1aが軸方向に積層されて形成されている。そして、ロータコア1の内部には、図示しない永久磁石が配置されている。また、ロータコア1の積層長さは、L1である。なお、積層長さL1とは、ロータコア1のZ1方向側の端面11のZ方向の位置P1と、ロータコア1のZ2方向側の端面12のZ方向の位置P2との距離である。なお、端面11および端面12は、それぞれ、請求の範囲の「第1端面」および「第2端面」の一例である。
シャフト2は、回転軸線C1回りに回転する部材である。具体的には、シャフト2は、ロータコア1、エンドプレート3aおよび3b、および、回転位置検出部5と一体的に、ステータ101に対して回転するように構成されている。シャフト2は、一方軸部材20と他方軸部材30とが接合部40により接合されることにより形成されている。すなわち、シャフト2は、複数の部材により形成されている。なお、一方軸部材20および他方軸部材30は、それぞれ、請求の範囲の「第1軸部材」および「第2軸部材」の一例である。
図2に示すように、一方軸部材20は、ロータコア1の径方向内側で、かつ、ロータコア1の軸方向一方側に延びるように配置されている。具体的には、一方軸部材20(後述する大径部分22)は、中空形状を有する。たとえば、一方軸部材20は、回転軸線C1に沿って貫通された円筒状に形成されている。また、一方軸部材20は、たとえば、炭素鋼により構成されている。また、一方軸部材20は、ロータコア1の軸方向中心C2よりもZ1方向側の位置からロータコア1よりもZ1方向側に亘って配置されている。一方軸部材20の軸方向の長さは、長さL1よりも大きいL2である。
図2に示すように、他方軸部材30は、一方軸部材20とは別個に形成されているとともに、ロータコア1のZ2方向側に配置されている。詳細には、他方軸部材30(後述する小径部分31および大径部分32)は、ロータコア1のZ2方向側の端面12(位置P2)よりもZ2方向側に配置されている。また、他方軸部材30は、ロータコア1よりもZ2方向側の位置からさらにZ2方向側に向かって延びるように配置されている。他方軸部材30の軸方向の長さは、長さL1よりも小さく、かつ、長さL2よりも小さいL3である。
図2に示すように、接合部40は、一方軸部材20の内周面22aと他方軸部材30の外周面32aとが溶接されることにより形成されている。具体的には、大径部分32の軸方向一方側(Z1方向側)の先端部分33における外周面32aと、大径部分22の軸方向他方側(Z2方向側)の先端部分23における内周面22aとが溶接により接合されている。詳細には、一方軸部材20と他方軸部材30とが径方向にオーバーラップする軸方向位置P5に設けられている。たとえば、図4に示すように、接合部40は、Z1方向に見て、周状に間欠的に設けられている。たとえば、接合部40は、Z1方向に見て、等角度間隔で複数設けられている。なお、図4では、軸受部材4bの図示を省略している。
図2に示すように、エンドプレート3aは、ロータコア1の軸方向一方側(Z1方向側)の端面11に配置されている。また、エンドプレート3bは、ロータコア1の軸方向他方側(Z2方向側)の端面12に配置されている。すなわち、エンドプレート3aおよび3bは、ロータコア1を軸方向の両側から挟み込むように配置されている。そして、エンドプレート3aおよび3bは、それぞれ、シャフト2(一方軸部材20)に固定されている。たとえば、エンドプレート3aおよび3bは、一方軸部材20に対してカシメ接合されている。
図2に示すように、軸受部材4aおよび回転位置検出部5は、一方軸部材20の小径部分21に配置されている。また、軸受部材4bは、他方軸部材30の小径部分31に配置されている。そして、軸受部材4aおよび4bは、シャフト2を回転軸C1回りに回転可能に支持するように構成されている。また、軸受部材4aは、一方軸部材20の外周面21bに設けられているとともに、径方向に見て、少なくとも一部が駆動力伝達部21cとオーバーラップする位置に、配置されている。また、小径部分21の外周面21bの軸方向位置P3に、軸受部材4aが配置されている。また、軸受部材4bは、小径部分31のうちの接合部40の軸方向位置P5よりもZ2方向側に形成されている。
ロータ100の製造方法は、図8に示すように、一方軸部材20を準備する一方軸部材準備工程(S1)と、他方軸部材30を準備する他方軸部材準備工程(S2)と、一方軸部材20の小径部分21に駆動力伝達部21cを形成する駆動力伝達部形成工程(S3)と、一方軸部材20の軸方向他方側(Z2方向側)の部分と他方軸部材30とを接合する接合工程(S4)と、を含むシャフト2の製造工程を備える。また、ロータ100の製造方法は、ロータコア1にシャフト2を固定する固定工程(S5)を備える。なお、一方軸部材準備工程および他方軸部材準備工程は、それぞれ、請求の範囲の「第1軸部材準備工程」および「第2軸部材準備工程」の一例である。
本実施形態では、以下のような効果を得ることができる。
なお、今回開示された実施形態は、すべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は、上記した実施形態の説明ではなく請求の範囲によって示され、さらに請求の範囲と均等の意味および範囲内でのすべての変更(変形例)が含まれる。
たとえば、上記実施形態では、ロータコア1の内周面13には、シャフト2のうちの一方軸部材20のみを固定する例を示したが、本発明はこれに限られない。たとえば、図5に示す第1変形例のロータ200のように、ロータコア201の内周面213には、一方軸部材220のみならず、他方軸部材230が固定されていてもよい。この場合、他方軸部材230の一部とロータコア201の一部とは、径方向に見て互いにオーバーラップする位置に配置される。なお、一方軸部材220および他方軸部材230は、それぞれ、請求の範囲の「第1軸部材」および「第2軸部材」の一例である。
また、上記実施形態では、一方軸部材20の大径部分22と他方軸部材30の大径部分32とを接合する例を示したが、本発明はこれに限られない。たとえば、図6に示す第2変形例のロータ300のように、一方軸部材320のZ2方向側の小径部分322と、他方軸部材330の小径部分332とが接合されていてもよい。なお、一方軸部材320および他方軸部材330は、それぞれ、請求の範囲の「第1軸部材」および「第2軸部材」の一例である。
たとえば、上記実施形態では、一方軸部材20(第1軸部材)の軸方向他方側(Z2方向側)の先端部分23の内周面22aと、他方軸部材30(第2軸部材)の軸方向一方側(Z1方向側)の先端部分33の外周面32aとが接合される例を示したが、本発明はこれに限られない。
また、上記実施形態では、シャフト2を、2つの部材(一方軸部材20および他方軸部材30)により構成する例を示したが、本発明はこれに限られない。すなわち、シャフトを、3つ以上の部材により構成してもよい。この場合、3つ以上の部材のうちの最も軸方向一方側に配置される部材に、ロータコアが固定されるとともに、駆動力伝達部が設けられる。
Claims (6)
- 軸方向一方側の第1端面と軸方向他方側の第2端面とを有する円筒形状のロータコアと、
前記ロータコアと一体的に回転するシャフトとを備え、
前記シャフトは、前記ロータコアの径方向内側に配置される中空形状の第1大径部分と、前記ロータコアの前記第1端面よりも前記軸方向一方側に配置され、且つ、前記第1大径部分と連続的に形成された第1小径部分とを一体的に有する第1軸部材と、前記ロータコアの前記第2端面よりも前記軸方向他方側に配置された第2小径部分を有する第2軸部材と、を含み、
前記第1軸部材の前記第1小径部分の少なくとも一部における外径、および、前記第2軸部材の前記第2小径部分の少なくとも一部における外径の各々は、前記ロータコアの内径よりも小さく、
前記第1軸部材の前記第1大径部分は、前記ロータコアの内周面に当接し、且つ、前記ロータコアからの駆動力が伝達される駆動力伝達外周面を有しており、
前記第1軸部材の前記第1小径部分には、前記ロータコアから前記駆動力伝達外周面を介して伝達された前記駆動力を駆動力伝達部材に伝達するための駆動力伝達部が設けられており、
前記第1軸部材の前記軸方向他方側の部分には、前記第2軸部材に接合される接合部が設けられており、
前記接合部は、前記駆動力伝達外周面の前記軸方向他方側の端部よりも前記軸方向他方側に位置する、ロータ。 - 前記接合部は、前記ロータコアの前記第2端面よりも前記軸方向他方側に配置されている、請求項1に記載のロータ。
- 前記第1軸部材の前記第1小径部分には、前記第1軸部材を支持する第1軸受部材が配置されており、
前記第2軸部材の前記第2小径部分には、前記第2軸部材を支持する第2軸受部材が配置されている、請求項1または2に記載のロータ。 - 前記第2軸部材は、前記第2小径部分よりも前記軸方向一方側に配置され、且つ、前記第2小径部分と連続的に形成された第2大径部分を有し、
前記第2大径部分の前記軸方向一方側の先端部分における外径は、前記第2小径部分の少なくとも一部における前記外径よりも大きく、且つ、前記第1大径部分の前記軸方向他方側の先端部分における外径と等しく、
前記第2大径部分の前記軸方向一方側の前記先端部分と、前記第1大径部分の前記軸方向他方側の前記先端部分とが溶接により接合されている、請求項1~3のいずれか1項に記載のロータ。 - 前記第2軸部材は、前記第2小径部分よりも前記軸方向一方側に配置され、且つ、前記第2小径部分と連続的に形成された第2大径部分を有し、
前記第2大径部分の前記軸方向一方側の先端部分における外径は、前記第2小径部分の少なくとも一部における前記外径よりも大きく、且つ、前記第1大径部分の前記軸方向他方側の先端部分における外径よりも小さく、
前記第2大径部分の前記軸方向一方側の前記先端部分における外周面と、前記第1大径部分の前記軸方向他方側の前記先端部分における内周面とが溶接により接合されている、
請求項1~3のいずれか1項に記載のロータ。 - 円筒形状のロータコアの径方向内側に配置される中空形状の第1大径部分と、前記ロータコアの軸方向一方側の第1端面よりも前記軸方向一方側に配置され、且つ、前記第1大径部分と連続的に形成されるとともに、少なくとも一部における外径が前記ロータコアの内径よりも小さい第1小径部分とを一体的に有する、前記ロータコアと一体的に回転するシャフトの第1軸部材を準備する第1軸部材準備工程と、
前記ロータコアの軸方向他方側の第2端面よりも前記軸方向他方側に配置され、少なくとも一部における外径が前記ロータコアの前記内径よりも小さい第2小径部分を有する、前記シャフトの第2軸部材を準備する第2軸部材準備工程と、
前記ロータコアの内周面に当接する前記第1大径部分の駆動力伝達外周面を介して伝達された前記ロータコアからの駆動力を駆動力伝達部材に伝達するための駆動力伝達部を、前記第1軸部材の前記第1小径部分に形成する駆動力伝達部形成工程と、
前記第1大径部分の前記駆動力伝達外周面の前記軸方向他方側の端部よりも前記軸方向他方側において、前記第1軸部材の前記軸方向他方側の部分と前記第2軸部材とを溶接により接合する接合工程と、
前記ロータコアに前記シャフトを固定する固定工程と、を備える、ロータの製造方法。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202080095317.1A CN115104244A (zh) | 2020-03-04 | 2020-12-24 | 转子以及转子的制造方法 |
EP20922888.1A EP4059630A4 (en) | 2020-03-04 | 2020-12-24 | ROTOR AND ROTOR MANUFACTURING METHOD |
JP2022504988A JP7287568B2 (ja) | 2020-03-04 | 2020-12-24 | ロータおよびロータの製造方法 |
US17/769,213 US20240120790A1 (en) | 2020-03-04 | 2020-12-24 | Rotor and rotor manufacturing method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2020036617 | 2020-03-04 | ||
JP2020-036617 | 2020-03-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2021176818A1 true WO2021176818A1 (ja) | 2021-09-10 |
Family
ID=77613286
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2020/048574 WO2021176818A1 (ja) | 2020-03-04 | 2020-12-24 | ロータおよびロータの製造方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20240120790A1 (ja) |
EP (1) | EP4059630A4 (ja) |
JP (1) | JP7287568B2 (ja) |
CN (1) | CN115104244A (ja) |
WO (1) | WO2021176818A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102022212360A1 (de) * | 2022-11-18 | 2024-05-23 | Mahle International Gmbh | Verfahren zum Herstellen einer Rotorwelle |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002199632A (ja) * | 2000-12-21 | 2002-07-12 | Nissan Motor Co Ltd | 回転電機の回転子 |
JP2017050925A (ja) * | 2015-08-31 | 2017-03-09 | 株式会社明電舎 | 永久磁石表面貼付形モータの回転子及びその製造方法 |
JP6162020B2 (ja) | 2013-10-18 | 2017-07-12 | 株式会社メタルアート | モータシャフトの製造方法 |
JP2019531901A (ja) * | 2016-09-26 | 2019-11-07 | ヒルシュフォーゲル ウムフォルムテクニク ゲーエムベーハー | ロータシャフトを製造するための方法及びロータシャフトに関する方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013176209A (ja) * | 2012-02-24 | 2013-09-05 | Ntn Corp | 車両用モータ駆動装置 |
CN106685134A (zh) * | 2017-02-22 | 2017-05-17 | 江苏天发动力科技有限公司 | 一种混合励磁电机 |
DE102018204436A1 (de) * | 2018-03-22 | 2019-09-26 | Volkswagen Aktiengesellschaft | Verfahren zur Montage von Lamellen- oder Blechpaketen auf einer Hohlwelle sowie ein auf diese Weise hergestellter Rotor für eine elektrische Maschine |
DE102018009832A1 (de) * | 2018-12-14 | 2019-06-27 | Daimler Ag | Hohlwelle für einen Rotor einer elektrischen Maschine |
-
2020
- 2020-12-24 EP EP20922888.1A patent/EP4059630A4/en active Pending
- 2020-12-24 CN CN202080095317.1A patent/CN115104244A/zh active Pending
- 2020-12-24 WO PCT/JP2020/048574 patent/WO2021176818A1/ja active Application Filing
- 2020-12-24 US US17/769,213 patent/US20240120790A1/en active Pending
- 2020-12-24 JP JP2022504988A patent/JP7287568B2/ja active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002199632A (ja) * | 2000-12-21 | 2002-07-12 | Nissan Motor Co Ltd | 回転電機の回転子 |
JP6162020B2 (ja) | 2013-10-18 | 2017-07-12 | 株式会社メタルアート | モータシャフトの製造方法 |
JP2017050925A (ja) * | 2015-08-31 | 2017-03-09 | 株式会社明電舎 | 永久磁石表面貼付形モータの回転子及びその製造方法 |
JP2019531901A (ja) * | 2016-09-26 | 2019-11-07 | ヒルシュフォーゲル ウムフォルムテクニク ゲーエムベーハー | ロータシャフトを製造するための方法及びロータシャフトに関する方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP4059630A4 |
Also Published As
Publication number | Publication date |
---|---|
US20240120790A1 (en) | 2024-04-11 |
JP7287568B2 (ja) | 2023-06-06 |
CN115104244A (zh) | 2022-09-23 |
EP4059630A4 (en) | 2023-01-04 |
EP4059630A1 (en) | 2022-09-21 |
JPWO2021176818A1 (ja) | 2021-09-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP2007068304A (ja) | 回転電機の回転子 | |
JP6618768B2 (ja) | 回転電気機械のロータ | |
JP2010098853A (ja) | ダブルステータ型モータ | |
WO2021176818A1 (ja) | ロータおよびロータの製造方法 | |
JP2011130530A (ja) | アキシャルギャップ型モータ及びそのロータ製造方法 | |
JP2015119557A (ja) | 回転電機用ロータ及びその製造方法 | |
WO2008068910A1 (ja) | ポリゴンミラースキャナモータとその製造方法 | |
JP2014158355A (ja) | 回転電機および回転電機の製造方法 | |
JP5924194B2 (ja) | マルチギャップ型回転電機 | |
JP6419111B2 (ja) | ロータ、回転電機及びロータの製造方法 | |
JP2000125525A (ja) | 車両用駆動装置 | |
JP4970970B2 (ja) | インホイールモータユニット用治具 | |
US7271514B2 (en) | Rotor structure | |
JP4253199B2 (ja) | 永久磁石形回転電機およびその製造方法 | |
JP6136912B2 (ja) | 回転電機用ロータ及びその製造方法 | |
WO2022137877A1 (ja) | 回転電機のロータ | |
JPWO2021176818A5 (ja) | ||
JPH08116632A (ja) | 回転電機の固定子 | |
JP7172940B2 (ja) | 電動機 | |
JP2020089228A (ja) | 回転電機のロータ及びその製造方法 | |
JP2022096011A (ja) | 回転電機のロータおよび回転電機のロータの製造方法 | |
JP3664145B2 (ja) | 回転電機のロータ構造 | |
JP2022155159A (ja) | ロータおよびロータの製造方法 | |
CN115706467A (zh) | 用于旋转电机的转子 | |
JP2010110100A (ja) | ロータシャフト |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 20922888 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 17769213 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: 2022504988 Country of ref document: JP Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 2020922888 Country of ref document: EP Effective date: 20220614 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |