CN113555985B - Rotor of rotary electric machine and method for manufacturing same - Google Patents
Rotor of rotary electric machine and method for manufacturing same Download PDFInfo
- Publication number
- CN113555985B CN113555985B CN202110395642.6A CN202110395642A CN113555985B CN 113555985 B CN113555985 B CN 113555985B CN 202110395642 A CN202110395642 A CN 202110395642A CN 113555985 B CN113555985 B CN 113555985B
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- diameter side
- magnetic flux
- columnar member
- rotor core
- inner diameter
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title description 3
- 238000003780 insertion Methods 0.000 claims abstract description 120
- 230000037431 insertion Effects 0.000 claims abstract description 120
- 230000004907 flux Effects 0.000 claims abstract description 98
- 239000000853 adhesive Substances 0.000 claims abstract description 74
- 230000001070 adhesive effect Effects 0.000 claims abstract description 74
- 239000000463 material Substances 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 19
- 239000010959 steel Substances 0.000 claims description 19
- 238000003475 lamination Methods 0.000 claims description 13
- 238000010030 laminating Methods 0.000 claims description 5
- 238000005304 joining Methods 0.000 claims description 2
- 238000004080 punching Methods 0.000 claims 2
- 230000002093 peripheral effect Effects 0.000 description 12
- 230000000694 effects Effects 0.000 description 7
- 229920001187 thermosetting polymer Polymers 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- 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
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
-
- 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
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Manufacture Of Motors, Generators (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
A rotor of a rotary electric machine and a method of manufacturing the same, wherein the amount of adhesive used to fill a gap between a rotor core and a permanent magnet for fixing the permanent magnet is reduced, thereby reducing the material consumption of the adhesive. The rotor core includes: a magnet insertion hole to which an inserted permanent magnet is fixed by an adhesive (7); an inner diameter side magnetic flux shielding hole provided at an inner diameter side end of the magnet insertion hole; an outer diameter side magnetic flux shielding hole provided at an outer diameter side end of the magnet insertion hole (5); and an inner diameter side columnar member and an outer diameter side columnar member disposed between the inner diameter side magnetic flux shielding hole and the outer diameter side magnetic flux shielding hole and the permanent magnet.
Description
Technical Field
The present application relates to a rotor of a rotating electrical machine and a method of manufacturing the same.
Background
A rotating electrical machine mounted in a vehicle such as a hybrid vehicle or an electric vehicle and used as a motor or a generator has a rotor composed of a rotor core formed by laminating electromagnetic steel plates and permanent magnets fixed to the rotor core. A magnet insertion hole for inserting a permanent magnet is provided in the rotor core, and a rotor is manufactured by inserting the permanent magnet into the magnet insertion hole. Since there is a risk that the permanent magnet breaks and flies out from the rotor core due to vibration during operation of the rotating electrical machine, a structure is disclosed in which an adhesive is filled in a gap between the rotor core and the permanent magnet to fix the permanent magnet (for example, refer to patent document 1).
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open No. 2006-109683
The rotor of the rotating electrical machine disclosed in patent document 1 has flux shielding holes provided at both ends of a magnet insertion hole for inserting a permanent magnet, the flux shielding holes being used for preventing short-circuiting of magnetic flux generated by the permanent magnet, and when an adhesive is filled in a gap between a rotor core and the permanent magnet, the flux shielding holes are also filled with the adhesive, and therefore, more adhesive than necessary for fixing the permanent magnet is used, and there is a problem that the material consumption of the adhesive becomes high. Further, since the amount of the adhesive used increases, the curing of the adhesive takes time, which results in a problem of deterioration in productivity.
Disclosure of Invention
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a rotor of a rotating electrical machine, which can reduce the material consumption of an adhesive by reducing the amount of the adhesive used to fill a gap between a rotor core and a permanent magnet in order to fix the permanent magnet.
The rotor of the rotating electrical machine disclosed in the present application is a rotor of a rotating electrical machine, the rotor of the rotating electrical machine is formed by assembling permanent magnets to a rotor core, wherein the rotor core includes: a magnet insertion hole to which the permanent magnet inserted is fixed by an adhesive; an inner diameter side magnetic flux shielding hole provided at an inner diameter side end of the magnet insertion hole; an outer diameter side magnetic flux shielding hole provided at an outer diameter side end portion of the magnet insertion hole; and a columnar member disposed between the permanent magnet and at least one of the inner diameter side magnetic flux shielding hole and the outer diameter side magnetic flux shielding hole.
According to the rotor of the rotating electrical machine disclosed in the present application, the filling of the adhesive into the magnetic flux shielding hole can be suppressed by the columnar member disposed between the magnetic flux shielding hole and the permanent magnet, and therefore, the amount of the adhesive to be used to fill the gap between the rotor core and the permanent magnet for fixing the permanent magnet can be reduced, thereby reducing the material consumption of the adhesive.
Drawings
Fig. 1 is a plan view showing a rotor of a rotary electric machine according to embodiment 1.
Fig. 2 is a partial plan view showing a part of a rotor according to embodiment 1.
Fig. 3 is a plan view showing a rotor of a rotary electric machine according to embodiment 2.
Fig. 4 is a partial plan view showing a part of a rotor according to embodiment 2.
Fig. 5 is a partial plan view showing a part of a rotor according to embodiment 3.
Fig. 6 is a partial plan view showing a part of a rotor according to embodiment 4.
Fig. 7 is a plan view showing a rotor of a rotary electric machine according to embodiment 5.
Fig. 8 is a diagram showing an example of a flowchart in a method of manufacturing a rotor according to an embodiment.
Fig. 9 is a diagram showing a flowchart in another method of manufacturing a rotor according to an embodiment.
(symbol description)
1. A rotor;
2. a rotor core;
3. a permanent magnet;
4a inner diameter side columnar member;
4b outer diameter side columnar member;
5. a magnet insertion hole;
6a inner diameter side magnetic flux shielding hole;
6b outer diameter side magnetic flux shielding holes;
7. an adhesive;
8a inner diameter side outer Zhou Zhuzhuang member insertion groove;
8b outer diameter side outer Zhou Zhuzhuang member insertion groove;
8c inner diameter side inner Zhou Zhuzhuang member insertion groove;
an 8d outer diameter side inner Zhou Zhuzhuang member is inserted into the groove.
Detailed Description
Hereinafter, a rotor of a rotary electric machine according to an embodiment will be described with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals.
Embodiment 1
Fig. 1 is a plan view showing a rotor of a rotary electric machine according to embodiment 1. Fig. 2 is a partial plan view showing a part of a rotor according to embodiment 1.
The rotor 1 includes: a rotor core 2 formed by laminating rotor core pieces; permanent magnets 3 assembled to the rotor core 2; and an inner diameter side columnar member 4a and an outer diameter side columnar member 4b as columnar members.
At least one pair of magnet insertion holes 5 constituting one pole of the rotor 1 are provided in the rotor core 2 in a V-shaped configuration, the magnet insertion holes 5 having a depth in the axial direction of the rotor 1 into which the permanent magnets 3 can be inserted.
The pair of magnet insertion holes 5 are formed in a V-shape so that the distance between them becomes wider toward the outer periphery than toward the inner periphery, an inner diameter side magnetic flux shielding hole 6a is provided at an inner diameter side end of the magnet insertion hole 5 in the rotor core, and an outer diameter side magnetic flux shielding hole 6b is provided at an outer diameter side end of the magnet insertion hole 5 in the rotor core. The permanent magnet 3 is inserted into the magnet insertion hole 5, and the thermosetting adhesive 7 is filled in the gap between the permanent magnet 3 and the magnet insertion hole 5.
The columnar member is composed of an inner diameter side columnar member 4a and an outer diameter side columnar member 4b, the inner diameter side columnar member 4a is arranged between the inner diameter side magnetic flux shielding hole 6a and the permanent magnet 3, and the outer diameter side columnar member 4b is arranged between the outer diameter side magnetic flux shielding hole 6b and the permanent magnet 3, thereby preventing the adhesive 7 from flowing into the inner diameter side magnetic flux shielding hole 6a and the outer diameter side magnetic flux shielding hole 6b.
According to the above configuration, the inner diameter side columnar member 4a disposed between the inner diameter side magnetic flux shielding hole 6a and the permanent magnet 3 suppresses the adhesive 7 from being filled in the inner diameter side magnetic flux shielding hole 6a, and the outer diameter side columnar member 4b disposed between the outer diameter side magnetic flux shielding hole 6b and the permanent magnet 3 suppresses the adhesive 7 from being filled in the outer diameter side magnetic flux shielding hole 6b, so that the amount of the adhesive to be used for filling the gap between the rotor core 2 and the permanent magnet 3 for fixing the permanent magnet 3 can be reduced, the material consumption of the adhesive can be reduced, the time for curing the adhesive can be shortened, and productivity can be improved.
In the above embodiment, the columnar members are both the inner diameter side columnar member 4a and the outer diameter side columnar member 4b, but the columnar members may be either one of the inner diameter side columnar member 4a and the outer diameter side columnar member 4b, and the same effect can be obtained.
Fig. 8 is a flowchart for explaining a method of manufacturing the rotor in embodiment 1.
First, in the electromagnetic steel plate processing step S10, a rotor core piece constituting the rotor core 2 is punched out of an electromagnetic steel plate as a base material, and a magnet insertion hole 5, an inner diameter side magnetic flux shielding hole 6a, and an outer diameter side magnetic flux shielding hole 6b are formed.
In the electromagnetic steel sheet lamination step S11, rotor core pieces formed of electromagnetic steel sheets are laminated to construct the rotor core 2. The laminated electromagnetic steel sheets are integrated by caulking, adhesion, welding, or the like.
After integrating the rotor core pieces, in the column member insertion step S12, the inner diameter side column member 4a and the outer diameter side column member 4b are inserted into the magnet insertion holes 5 from the lamination direction of the rotor core.
In the adhesive filling step S13, the magnet insertion hole 5 is filled with the adhesive 7. At this time, since the inner diameter side columnar member 4a and the outer diameter side columnar member 4b are inserted, the adhesive can be suppressed from flowing into the inner diameter side magnetic flux shielding hole 6a and the outer diameter side magnetic flux shielding hole 6b.
In the permanent magnet insertion step S14, the permanent magnets 3 are inserted into the magnet insertion holes 5 from the lamination direction of the rotor core 2. By inserting the permanent magnet 3 into the magnet insertion hole 5, the liquid surface of the adhesive filled in the magnet insertion hole 5 is raised. The filling amount of the adhesive is set so that the liquid surface of the adhesive filled in the gap between the permanent magnet 3 and the magnet insertion hole 5 is lower than the axial heights of the inner diameter side columnar member 4a and the outer diameter side columnar member 4b.
According to the above manufacturing method, leakage of the adhesive from the magnet insertion hole 5 to the inner diameter side magnetic flux shielding hole 6a and the outer diameter side magnetic flux shielding hole 6b can be suppressed.
The above-described manufacturing method is an example of the case where both the inner diameter side columnar member 4a and the outer diameter side columnar member 4b are provided, but can be applied to a manufacturing method of a rotor configured to provide either one of the inner diameter side columnar member 4a and the outer diameter side columnar member 4b as a columnar member, and the same effects can be obtained.
Embodiment 2
Fig. 3 is a plan view showing a rotor of a rotary electric machine according to embodiment 2. Fig. 4 is a partial plan view showing a part of a rotor according to embodiment 2.
The rotor 1 includes: a rotor core 2 formed by laminating rotor core pieces; permanent magnets 3 assembled to the rotor core; and an inner diameter side columnar member 4c and an outer diameter side columnar member 4d as columnar members.
At least one pair of magnet insertion holes 5 constituting one pole of the rotor 1 are arranged in a V-shaped arrangement on the rotor core 2, the magnet insertion holes 5 having a depth in the axial direction of the rotor 1 into which the permanent magnets 3 can be inserted.
The pair of magnet insertion holes 5 are formed in a V-shape so that the distance between them becomes wider toward the outer periphery than toward the inner periphery, an inner diameter side magnetic flux shielding hole 6a is provided at an inner diameter side end of the magnet insertion hole 5, and an outer diameter side magnetic flux shielding hole 6b is provided at an outer diameter side end of the magnet insertion hole 5.
An inner diameter side outer Zhou Zhuzhuang member insertion groove 8a and an outer diameter side outer Zhou Zhuzhuang member insertion groove 8b are provided on the outer peripheral side of the magnet insertion hole 5. The inner diameter side outer Zhou Zhuzhuang member insertion groove 8a is disposed on the outer peripheral side between the magnet insertion hole 5 and the inner diameter side magnetic flux shielding hole 6a, and the outer diameter side outer Zhou Zhuzhuang member insertion groove 8b is disposed on the outer peripheral side between the magnet insertion hole 5 and the outer diameter side magnetic flux shielding hole 6b. The permanent magnet 3 is inserted into the magnet insertion hole 5, and the thermosetting adhesive 7 is filled in the gap between the permanent magnet 3 and the magnet insertion hole 5.
The columnar member is composed of an inner diameter side columnar member 4c and an outer diameter side columnar member 4d. The inner diameter side columnar member 4c is inserted into the inner diameter side outer Zhou Zhuzhuang member insertion groove 8a and disposed between the inner diameter side magnetic flux shielding hole 6a and the permanent magnet 3, and the outer diameter side columnar member 4d is inserted into the outer diameter side outer Zhou Zhuzhuang member insertion groove 8b and disposed between the outer diameter side magnetic flux shielding hole 6b and the permanent magnet 3, thereby preventing the adhesive 7 from flowing into the inner diameter side magnetic flux shielding hole 6a and the outer diameter side magnetic flux shielding hole 6b.
According to the above configuration, the inner diameter side columnar member 4c disposed between the inner diameter side magnetic flux shielding hole 6a and the permanent magnet 3 suppresses the adhesive 7 from being filled in the inner diameter side magnetic flux shielding hole 6a, and the outer diameter side columnar member 4d disposed between the outer diameter side magnetic flux shielding hole 6b and the permanent magnet 3 suppresses the adhesive 7 from being filled in the outer diameter side magnetic flux shielding hole 6b, so that the amount of the adhesive to be used for filling the gap between the rotor core 2 and the permanent magnet 3 for fixing the permanent magnet 3 can be reduced, the material consumption of the adhesive can be reduced, the time for curing the adhesive can be shortened, and productivity can be improved.
In the above embodiment, the columnar members are both the inner diameter side columnar member 4c and the outer diameter side columnar member 4d, but the columnar members may be either one of the inner diameter side columnar member 4c and the outer diameter side columnar member 4d, and the same effect can be obtained.
Fig. 9 is a flowchart for explaining a method of manufacturing the rotor in embodiment 2.
First, in the electromagnetic steel plate processing step S20, a rotor core piece constituting the rotor core 2 is punched out of an electromagnetic steel plate as a base material, and a magnet insertion hole 5, an inner diameter side magnetic flux shielding hole 6a, an outer diameter side magnetic flux shielding hole 6b, an inner diameter side outer Zhou Zhuzhuang member insertion groove 8a, and an outer diameter side outer Zhou Zhuzhuang member insertion groove 8b are formed.
In the electromagnetic steel sheet lamination step S21, rotor core pieces formed of electromagnetic steel sheets are laminated to construct the rotor core 2. The laminated electromagnetic steel sheets are integrated by caulking, adhesion, welding, or the like.
In the permanent magnet/columnar member joining step S22, the inner diameter side columnar member 4c and the outer diameter side columnar member 4d are fixed to the permanent magnet 3 by a fixing method such as fitting, adhesion, welding, or the like, thereby forming a joined body.
In the coupled body inserting step S23, the coupled body of the inner diameter side columnar member 4c and the outer diameter side columnar member 4d and the permanent magnet 3 is inserted into the magnet insertion hole 5 from the lamination direction of the rotor core 2.
The inner diameter side columnar member 4c is inserted from the lamination direction of the rotor core 2 and fitted into the inner diameter side outer Zhou Zhuzhuang member insertion groove 8a, thereby being positioned on a plane perpendicular to the lamination direction. The outer diameter side columnar member 4d is positioned by being inserted from the lamination direction of the rotor core 2 and fitted into the outer diameter side outer Zhou Zhuzhuang member insertion groove 8b.
In the adhesive filling step S24, the magnet insertion hole 5 is filled with the adhesive 7. At this time, since the inner diameter side columnar member 4c and the outer diameter side columnar member 4d are inserted into the magnet insertion hole 5, the inner diameter side outer Zhou Zhuzhuang member insertion groove 8a and the outer diameter side outer Zhou Zhuzhuang member insertion groove 8b, the inflow of the adhesive into the inner diameter side magnetic flux shielding hole 6a and the outer diameter side magnetic flux shielding hole 6b can be suppressed.
The filling amount of the adhesive is set such that the liquid surface of the adhesive filled in the gap between the permanent magnet 3 and the magnet insertion hole 5 is lower than the axial heights of the inner diameter side columnar member 4c and the outer diameter side columnar member 4d.
According to the above manufacturing method, leakage of the adhesive from the magnet insertion hole 5 to the inner diameter side magnetic flux shielding hole 6a and the outer diameter side magnetic flux shielding hole 6b can be suppressed.
The above-described manufacturing method is an example of the case where both the inner diameter side columnar member 4c and the outer diameter side columnar member 4d are provided, but can be applied to a manufacturing method of a rotor configured to provide either one of the inner diameter side columnar member 4c and the outer diameter side columnar member 4d as a columnar member, and the same effects can be obtained.
Embodiment 3
Fig. 5 is a partial plan view showing a part of a rotor of a rotary electric machine according to embodiment 3.
At least one pair of magnet insertion holes 5 constituting one pole of the rotor 1 are provided in the rotor core 2 in a V-shaped configuration, the magnet insertion holes 5 having a depth in the axial direction of the rotor 1 into which the permanent magnets 3 can be inserted.
The pair of magnet insertion holes 5 are formed in a V-shape so that the distance between them becomes wider toward the outer periphery than toward the inner periphery, an inner diameter side magnetic flux shielding hole 6a is provided at an inner diameter side end of the magnet insertion hole 5, and an outer diameter side magnetic flux shielding hole 6b is provided at an outer diameter side end of the magnet insertion hole 5.
An inner diameter side inner Zhou Zhuzhuang member insertion groove 8c and an outer diameter side inner Zhou Zhuzhuang member insertion groove 8d are provided on the inner peripheral side of the magnet insertion hole 5. The inner diameter side inner Zhou Zhuzhuang member insertion groove 8c is disposed on the inner peripheral side between the magnet insertion hole 5 and the inner diameter side magnetic flux shielding hole 6a, and the outer diameter side inner Zhou Zhuzhuang member insertion groove 8d is disposed on the inner peripheral side between the magnet insertion hole 5 and the outer diameter side magnetic flux shielding hole 6b. The permanent magnet 3 is inserted into the magnet insertion hole 5, and the thermosetting adhesive 7 fills the gap between the permanent magnet 3 and the magnet insertion hole 5.
The columnar member is composed of an inner diameter side columnar member 4e and an outer diameter side columnar member 4 f. The inner diameter side columnar member 4e is inserted into the inner diameter side inner Zhou Zhuzhuang member insertion groove 8c and disposed between the inner diameter side magnetic flux shielding hole 6a and the permanent magnet 3, and the outer diameter side columnar member 4f is inserted into the outer diameter side inner Zhou Zhuzhuang member insertion groove 8d and disposed between the outer diameter side magnetic flux shielding hole 6b and the permanent magnet 3, thereby preventing the adhesive 7 from flowing into the inner diameter side magnetic flux shielding hole 6a and the outer diameter side magnetic flux shielding hole 6b.
According to the above configuration, the inner diameter side columnar member 4e arranged between the inner diameter side magnetic flux shielding hole 6a and the permanent magnet 3 suppresses the adhesive from filling the inner diameter side magnetic flux shielding hole 6a, and the outer diameter side columnar member 4f arranged between the outer diameter side magnetic flux shielding hole 6b and the permanent magnet 3 suppresses the adhesive from filling the outer diameter side magnetic flux shielding hole 6b, so that the amount of the adhesive to be used for fixing the permanent magnet 3 to fill the gap between the rotor core 2 and the permanent magnet 3 can be reduced, the material consumption of the adhesive can be reduced, the time for curing the adhesive can be shortened, and the productivity can be improved.
In the above embodiment, the columnar members are both the inner diameter side columnar member 4e and the outer diameter side columnar member 4f, but the columnar members may be either the inner diameter side columnar member 4e or the outer diameter side columnar member 4f, and the same effect can be obtained.
As in embodiment 2, in embodiment 3, the rotor can be manufactured by the manufacturing method shown in the flowchart of fig. 9.
Embodiment 4
Fig. 6 is a partial plan view showing a part of a rotor of a rotary electric machine according to embodiment 4.
The rotor core 2 is provided such that at least one pair of magnet insertion holes 5 constituting one pole of the rotor 1 are arranged in a V-shape, the magnet insertion holes 5 having a depth in the axial direction of the rotor 1 into which the permanent magnets 3 can be inserted.
The pair of magnet insertion holes 5 are formed in a V-shape so that the distance between them becomes wider toward the outer periphery than toward the inner periphery, inner diameter side magnetic flux shielding holes 6a are provided at inner diameter side ends of the magnet insertion holes 5, and outer diameter side magnetic flux shielding holes 6b are provided at outer diameter side ends of the magnet insertion holes 5.
An inner diameter side outer Zhou Zhuzhuang member insertion groove 8a and an outer diameter side outer Zhou Zhuzhuang member insertion groove 8b are provided on the outer peripheral side of the magnet insertion hole 5, and an inner diameter side inner Zhou Zhuzhuang member insertion groove 8c and an outer diameter side inner Zhou Zhuzhuang member insertion groove 8d are provided on the inner peripheral side of the magnet insertion hole 5. The inner diameter side outer Zhou Zhuzhuang member insertion groove 8a is disposed on the outer peripheral side between the magnet insertion hole 5 and the inner diameter side magnetic flux shielding hole 6a, and the outer diameter side outer Zhou Zhuzhuang member insertion groove 8b is disposed on the outer peripheral side between the magnet insertion hole 5 and the outer diameter side magnetic flux shielding hole 6b. The inner diameter side inner Zhou Zhuzhuang member insertion groove 8c is disposed on the inner peripheral side between the magnet insertion hole 5 and the inner diameter side magnetic flux shielding hole 6a, and the outer diameter side inner Zhou Zhuzhuang member insertion groove 8d is disposed on the inner peripheral side between the magnet insertion hole 5 and the outer diameter side magnetic flux shielding hole 6b. The permanent magnet 3 is inserted into the magnet insertion hole 5, and the thermosetting adhesive 7 is filled in the gap between the permanent magnet 3 and the magnet insertion hole 5.
The columnar member is composed of an inner diameter side columnar member 4g and an outer diameter side columnar member 4 h. The inner diameter side columnar member 4g is inserted into the inner diameter side outer Zhou Zhuzhuang member insertion groove 8a and the inner diameter side inner Zhou Zhuzhuang member insertion groove 8c, and is disposed between the inner diameter side magnetic flux shielding hole 6a and the permanent magnet 3, and the outer diameter side columnar member 4h is inserted into the outer diameter side outer Zhou Zhuzhuang member insertion groove 8d and the outer diameter side inner Zhou Zhuzhuang member insertion groove 8d, and is disposed between the outer diameter side magnetic flux shielding hole 6b and the permanent magnet 3, thereby preventing the adhesive 7 from flowing into the inner diameter side magnetic flux shielding hole 6a and the outer diameter side magnetic flux shielding hole 6b.
According to the above configuration, the inner diameter side columnar member 4g disposed between the inner diameter side magnetic flux shielding hole 6a and the permanent magnet 3 suppresses the adhesive from being filled in the inner diameter side magnetic flux shielding hole 6a, and the outer diameter side columnar member 4h disposed between the outer diameter side magnetic flux shielding hole 6b and the permanent magnet 3 suppresses the adhesive from being filled in the outer diameter side magnetic flux shielding hole 6b, so that the amount of the adhesive to be used for fixing the permanent magnet 3 to fill the gap between the rotor core 2 and the permanent magnet 3 can be reduced, the material consumption of the adhesive can be reduced, the time for curing the adhesive can be shortened, and the productivity can be improved.
In the above embodiment, the columnar members are both the inner diameter side columnar member 4g and the outer diameter side columnar member 4h, but the columnar members may be either the inner diameter side columnar member 4g or the outer diameter side columnar member 4h, and the same effect can be obtained.
In embodiment 4, as in embodiment 2 and embodiment 3, a rotor can be manufactured by the manufacturing method shown in the flowchart of fig. 9.
Embodiment 5
Fig. 7 is a plan view showing a rotor of a rotary electric machine according to embodiment 5.
In the above embodiments, the columnar member is a columnar member having a prismatic shape and functions as a spacer that divides the region between the inner diameter side magnetic flux shielding hole 6a or the outer diameter side magnetic flux shielding hole 6b and the magnet insertion hole 5, but as illustrated in fig. 7, the inner diameter side columnar member 4i and the outer diameter side columnar member 4j, which are columnar members having a longitudinal direction in the axial direction, may be disposed substantially in the region between the inner diameter side magnetic flux shielding hole 6a or the outer diameter side magnetic flux shielding hole 6b and the magnet insertion hole 5.
In the case of such a configuration, the cylindrical inner-diameter-side columnar member 4i and outer-diameter-side columnar member 4j do not function as a spacer that completely divides the space between the inner-diameter-side magnetic flux shielding hole 6a or the outer-diameter-side magnetic flux shielding hole 6b and the region of the permanent magnet 3, but when the magnet insertion hole 5 is filled with the adhesive 7 in the adhesive filling step S24 in fig. 9, for example, the inner-diameter-side magnetic flux shielding hole 6a or the outer-diameter-side magnetic flux shielding hole 6b is prevented from being filled with the adhesive to a certain level by disposing the cylindrical inner-diameter-side columnar member 4i and the outer-diameter-side columnar member 4 j. Therefore, although a specific illustration of the region where the adhesive 7 is disposed is omitted, the adhesive is suppressed from being filled in the inner diameter side magnetic flux shielding hole 6a or the outer diameter side magnetic flux shielding hole 6b, and as a result, a state is obtained in which the amount of the adhesive (or the filling rate per unit volume) filled in the inner diameter side magnetic flux shielding hole 6a or the outer diameter side magnetic flux shielding hole 6b is smaller than the amount of the adhesive 7 (or the filling rate per unit volume) filled in the magnet insertion hole 5.
That is, in the case of comparing both sides of the inner diameter side columnar member 4i and the outer diameter side columnar member 4j, a state is obtained in which the amount of the adhesive (or the filling rate per unit volume) is smaller in the region on the side far from the permanent magnet 3 than in the region on the side near the permanent magnet 3, or a state in which the adhesive is not filled in the region on the side far from the permanent magnet 3.
In the above embodiment, the columnar members are both the inner diameter side columnar member 4i and the outer diameter side columnar member 4j, but the columnar members may be either one of the inner diameter side columnar member 4i and the outer diameter side columnar member 4j, and the same effect can be obtained.
In embodiment 5, the manufacturing method shown in the flowchart of fig. 9 can be appropriately selected to manufacture the rotor, as in the above embodiments.
The present application describes various exemplary embodiments and examples, but the various features, aspects, and functions described in one or more embodiments are not limited to application to a particular embodiment, and can be applied to embodiments alone or in various combinations.
Accordingly, numerous modifications, not illustrated, are contemplated as falling within the scope of the technology disclosed in the present specification. For example, the case where at least one component is deformed, added, or omitted is included, and the case where at least one component is extracted and combined with the components of the other embodiments is also included.
Claims (4)
1. A rotor of a rotary electric machine in which permanent magnets are assembled to a rotor core, characterized in that,
the rotor core includes:
a magnet insertion hole into which the permanent magnet is inserted, and to which the permanent magnet is fixed by an adhesive;
an inner diameter side magnetic flux shielding hole provided at an end of the magnet insertion hole on an inner diameter side in the rotor core;
an outer diameter side magnetic flux shielding hole provided at an outer diameter side end portion of the magnet insertion hole in the rotor core; and
a columnar member having a columnar shape in the longitudinal direction, the columnar member being disposed between the permanent magnet and at least one of the inner diameter side magnetic flux shielding hole and the outer diameter side magnetic flux shielding hole,
the columnar member abuts against either one or both of the rotor core and the permanent magnet at an inner side of the magnet insertion hole,
the filling rate per unit volume of the adhesive filled in the inner diameter side magnetic flux shielding hole or the outer diameter side magnetic flux shielding hole in which the columnar member is disposed is smaller than the filling rate per unit volume of the adhesive filled in the magnet insertion hole.
2. A rotor for a rotary electric machine according to claim 1, wherein,
the columnar member constitutes a bonded body fixed to the permanent magnet.
3. A method of manufacturing a rotor of a rotary electric machine according to claim 1, comprising:
an electromagnetic steel plate processing step of punching a rotor core piece constituting a rotor core from an electromagnetic steel plate as a base material and forming a magnet insertion hole, an inner diameter side magnetic flux shielding hole, and an outer diameter side magnetic flux shielding hole;
an electromagnetic steel sheet lamination step of laminating rotor core pieces formed of electromagnetic steel sheets to construct a rotor core;
a columnar member insertion step of inserting an inner diameter side columnar member and an outer diameter side columnar member into the magnet insertion hole from a lamination direction of the rotor core after integrating the rotor core pieces;
an adhesive filling step of filling the magnet insertion hole with an adhesive; and
and a permanent magnet insertion step of inserting a permanent magnet into the magnet insertion hole from the lamination direction of the rotor core.
4. A method of manufacturing a rotor of a rotary electric machine according to claim 1, comprising:
an electromagnetic steel plate processing step of punching a rotor core piece constituting a rotor core from an electromagnetic steel plate as a base material, and forming a magnet insertion hole, an inner diameter side magnetic flux shielding hole, an outer diameter side magnetic flux shielding hole, an inner diameter side outer Zhou Zhuzhuang member insertion groove, and an outer diameter side outer Zhou Zhuzhuang member insertion groove;
an electromagnetic steel sheet lamination step of laminating rotor core pieces formed of electromagnetic steel sheets to construct a rotor core;
a permanent magnet and columnar member joining step of fixing the inner diameter side columnar member and the outer diameter side columnar member to the permanent magnet to form a joined body;
a coupled body insertion step of inserting a coupled body of the inner diameter side columnar member and the outer diameter side columnar member and the permanent magnet into the magnet insertion hole from a lamination direction of the rotor core; and
and an adhesive filling step of filling the magnet insertion hole with an adhesive.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020076475A JP6983274B2 (en) | 2020-04-23 | 2020-04-23 | Rotor of rotary electric machine and its manufacturing method |
| JP2020-076475 | 2020-04-23 |
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| Publication Number | Publication Date |
|---|---|
| CN113555985A CN113555985A (en) | 2021-10-26 |
| CN113555985B true CN113555985B (en) | 2024-03-05 |
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| CN (1) | CN113555985B (en) |
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|---|---|---|---|---|
| JP2009296696A (en) * | 2008-06-02 | 2009-12-17 | Toyota Motor Corp | Rotor |
| JP2012147673A (en) * | 2011-10-13 | 2012-08-02 | Mitsui High Tec Inc | Resin seal apparatus of permanent magnets |
| JP2014197970A (en) * | 2013-03-29 | 2014-10-16 | 株式会社小松製作所 | Motor |
| JP2014212589A (en) * | 2013-04-17 | 2014-11-13 | 株式会社豊田自動織機 | Dynamo-electric machine |
| CN105305679A (en) * | 2014-06-20 | 2016-02-03 | 日本电产株式会社 | Motor |
| CN108886278A (en) * | 2016-03-31 | 2018-11-23 | 爱信艾达株式会社 | Rotor for dynamo-electric machine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5556400B2 (en) * | 2010-06-09 | 2014-07-23 | 富士電機株式会社 | Rotor core member and permanent magnet fixing method |
| WO2012011191A1 (en) * | 2010-07-23 | 2012-01-26 | トヨタ自動車株式会社 | Rotor and ipm motor |
-
2020
- 2020-04-23 JP JP2020076475A patent/JP6983274B2/en active Active
-
2021
- 2021-04-13 CN CN202110395642.6A patent/CN113555985B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009296696A (en) * | 2008-06-02 | 2009-12-17 | Toyota Motor Corp | Rotor |
| JP2012147673A (en) * | 2011-10-13 | 2012-08-02 | Mitsui High Tec Inc | Resin seal apparatus of permanent magnets |
| JP2014197970A (en) * | 2013-03-29 | 2014-10-16 | 株式会社小松製作所 | Motor |
| JP2014212589A (en) * | 2013-04-17 | 2014-11-13 | 株式会社豊田自動織機 | Dynamo-electric machine |
| CN105305679A (en) * | 2014-06-20 | 2016-02-03 | 日本电产株式会社 | Motor |
| CN108886278A (en) * | 2016-03-31 | 2018-11-23 | 爱信艾达株式会社 | Rotor for dynamo-electric machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113555985A (en) | 2021-10-26 |
| JP2021175249A (en) | 2021-11-01 |
| JP6983274B2 (en) | 2021-12-17 |
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