CN116995832A - Rotary electric machine and rotor thereof - Google Patents
Rotary electric machine and rotor thereof Download PDFInfo
- Publication number
- CN116995832A CN116995832A CN202210915630.6A CN202210915630A CN116995832A CN 116995832 A CN116995832 A CN 116995832A CN 202210915630 A CN202210915630 A CN 202210915630A CN 116995832 A CN116995832 A CN 116995832A
- Authority
- CN
- China
- Prior art keywords
- rotor
- main portion
- end plate
- rotor shaft
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000013459 approach Methods 0.000 claims abstract description 5
- 238000003780 insertion Methods 0.000 claims description 22
- 230000037431 insertion Effects 0.000 claims description 22
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 230000007423 decrease Effects 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
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
- H02K1/27—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
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention provides a rotary electric machine and a rotor thereof, which can inhibit the decline of assembly workability. A pair of grooves (8 a) are provided in the rotor shaft (8). Each first end plate (14) has a plurality of first protrusions (14 b). Furthermore, each first front end (14 c) is inserted into the groove (8 a). Each first protrusion (14 b) is elastically deformed in a direction in which the first tip (14 c) approaches the end face (11 c). As a result, the first plate main section (14 a) is pressed in a direction to come into contact with the end surface (11 c) by the restoring force of each of the plurality of first protruding sections (14 b).
Description
Technical Field
The present disclosure relates to a rotating electrical machine and a rotor thereof.
Background
In a rotor of a conventional motor, an end plate is fixed to a rotor shaft by caulking the rotor shaft (for example, refer to patent document 1).
Prior art literature
Patent literature
Patent document 1: japanese patent application laid-open No. 2004-222348
Disclosure of Invention
Problems to be solved by the invention
In the rotor of the above-described conventional motor, it is necessary to perform caulking work on the rotor shaft, and therefore, the assembling workability is lowered.
The present disclosure has been made to solve the above-described problems, and an object thereof is to provide a rotary electric machine and a rotor thereof capable of suppressing a decrease in assembly workability.
Means for solving the problems
The rotor of the rotating electrical machine of the present disclosure includes: a rotor core provided with a magnet insertion hole and a shaft insertion hole; a permanent magnet inserted into the magnet insertion hole; a rotor shaft inserted into the shaft insertion hole; and an end plate body that abuts an end surface of the rotor core in the axial direction of the rotor shaft, prevents the permanent magnet from falling out of the magnet insertion hole, and has a groove provided in the outer peripheral surface of the rotor shaft along the circumferential direction of the rotor shaft, the end plate body having a first end plate that has: an annular first plate main portion; and a plurality of first protruding portions protruding from the first plate main portion toward the inside of the first plate main portion, respectively, as first tip insertion grooves of tips of the respective first protruding portions, each of the first protruding portions elastically deforming in a direction in which the first tip approaches the end face, the first plate main portion being pressed in a direction in which the first plate main portion contacts the end face by restoring forces of the respective plurality of first protruding portions.
Effects of the invention
According to the rotary electric machine and the rotor thereof of the present disclosure, a decrease in assembly workability can be suppressed.
Drawings
Fig. 1 is a cross-sectional view of a rotary electric machine according to embodiment 1.
Fig. 2 is a perspective view illustrating the rotor of fig. 1.
Fig. 3 is a cross-sectional view of the rotor of fig. 2.
Fig. 4 is a perspective view illustrating the rotor core and the plurality of permanent magnets of fig. 2.
Fig. 5 is a perspective view illustrating the first end plate of fig. 3.
Fig. 6 is a perspective view illustrating the second end plate of fig. 3.
Fig. 7 is a sectional view showing a key portion of fig. 3 in an enlarged manner.
Description of the reference numerals
5: a rotor; 8: a rotor shaft; 8a: a groove; 11: a rotor core; 11a: a shaft insertion hole; 11b: a magnet insertion hole; 11c: an end face; 12: a permanent magnet; 13: an end plate body; 14: a 1 st end plate; 14a: 1 st plate main part; 14b: 1 st projection; 14c: the 1 st front end; 15: a 2 nd end plate; 15a: a 2 nd plate main portion; 15b: a 2 nd protrusion; 15c: front end 2.
Detailed Description
Hereinafter, embodiments will be described with reference to the drawings.
Embodiment 1
Fig. 1 is a cross-sectional view of a rotary electric machine according to embodiment 1. In the figure, the rotary electric machine has a housing 1, a first bearing 2, a second bearing 3, a stator 4, and a rotor 5.
The first bearing 2 and the second bearing 3 are held to the housing 1. The first bearing 2 and the second bearing 3 are opposed to each other.
The stator 4 has an annular stator core 6 and a plurality of stator coils 7. The stator core 6 is fixed in the housing 1. A plurality of stator coils 7 are wound around the stator core 6.
The rotor 5 has a rotor shaft 8 and a rotor body 9. The rotor shaft 8 is rotatably held to the housing 1 by means of the first bearing 2 and the second bearing 3. Fig. 1 shows a section of the rotating electrical machine along the axial center C of the rotor shaft 8.
The rotor body 9 is fixed to the rotor shaft 8 in the housing 1, and rotates integrally with the rotor shaft 8. The outer peripheral surface of the rotor body 9 faces the inner peripheral surface of the stator core 6 with a gap therebetween.
Fig. 2 is a perspective view showing the rotor 5 of fig. 1, and shows a part of the rotor body 9 in cut-away. Fig. 3 is a sectional view of the rotor 5 of fig. 2, showing a section along the axial center C of the rotor shaft 8.
The rotor body 9 includes an annular rotor core 11, a plurality of permanent magnets 12, and a pair of end plate bodies 13.
The rotor core 11 is formed by stacking a plurality of annular magnetic steel plates in the axial direction of the rotor shaft 8. The axial direction of the rotor shaft 8 is parallel to the axial center C. The plurality of magnetic steel plates are integrated at the plurality of caulking portions 11d.
Fig. 4 is a perspective view illustrating the rotor core 11 and the plurality of permanent magnets 12 of fig. 2. A shaft insertion hole 11a is provided in the center of the rotor core 11. The rotor shaft 8 is inserted into the shaft insertion hole 11a. Further, the rotor shaft 8 penetrates the rotor core 11.
The rotor core 11 is provided with a plurality of magnet insertion holes 11b at equal intervals in the circumferential direction of the rotor shaft 8. The plurality of magnet insertion holes 11b are located on the same circumference centered on the axis C. Further, the magnet insertion holes 11b are continuously provided throughout the rotor core 11 along the axial direction of the rotor shaft 8.
Each permanent magnet 12 is inserted into the corresponding magnet insertion hole 11b. The size of each permanent magnet 12 in the axial direction of the rotor shaft 8 is the same as the size of the rotor core 11 in the axial direction of the rotor shaft 8. Each permanent magnet 12 may be constituted by a plurality of divided magnets arranged in the axial direction of the rotor shaft 8.
Returning to fig. 3, each end plate 13 abuts against an end face 11c of the rotor core 11 in the axial direction of the rotor shaft 8. Thus, each end plate 13 covers the plurality of magnet insertion holes 11b, and prevents the plurality of permanent magnets 12 from coming off the plurality of magnet insertion holes 11b.
Each end plate body 13 has an annular first end plate 14 and an annular second end plate 15. The second end plate 15 is in contact with the corresponding end face 11c. The first end plate 14 is in contact with the second end plate 15. That is, the second end plate 15 is interposed between the end face 11c and the first end plate 14.
A pair of grooves 8a are provided on the outer peripheral surface of the rotor shaft 8 at intervals in the axial direction of the rotor shaft 8. Each groove 8a is provided along the circumferential direction of the rotor shaft 8. Further, each groove 8a is continuously provided throughout the entire circumference of the rotor shaft 8. The circumferential direction of the rotor shaft 8 is a direction along a circumference centered on the axial center C.
The rotor core 11 is disposed between the pair of slots 8a in the axial direction of the rotor shaft 8.
Fig. 5 is a perspective view illustrating the first end plate 14 of fig. 3. The first end plate 14 has an annular first plate main portion 14a and a plurality of first protruding portions 14b.
The plurality of first protruding portions 14b protrude inward of the first plate main portion 14a from the first plate main portion 14a, respectively. That is, each first protrusion 14b protrudes toward the rotor shaft 8. Further, each first protrusion 14b is elastically deformable.
The size of each first projecting portion 14b in the circumferential direction of the rotor shaft 8 continuously decreases as it moves away from the first plate main portion 14 a.
Fig. 6 is a perspective view illustrating the second end plate 15 of fig. 3. The second end plate 15 has an annular second plate main portion 15a and a plurality of second protruding portions 15b.
The plurality of second protruding portions 15b protrude inward of the second plate main portion 15a from the second plate main portion 15a, respectively. That is, each second protrusion 15b protrudes toward the rotor shaft 8. Further, each of the second protrusions 15b is elastically deformable.
The size of each second protruding portion 15b in the circumferential direction of the rotor shaft 8 continuously decreases as it gets farther from the second plate main portion 15 a.
In embodiment 1, as shown in fig. 2, the plurality of first protrusions 14b and the plurality of second protrusions 15b are alternately arranged in the circumferential direction of the rotor shaft 8.
Fig. 7 is a sectional view showing a key portion of fig. 3 in an enlarged manner. The first distal end 14c, which is the distal end of each first projection 14b, is inserted into the groove 8a. Each first projection 14b is elastically deformed in a direction in which the first tip 14c approaches the end face 11c. Each first front end 14c is in contact with a side surface of the groove 8a.
The first plate main portion 14a is pressed in a direction to come into contact with the end surface 11c by the restoring force of each of the plurality of first protruding portions 14b. Thereby, the first plate main portion 14a presses the second plate main portion 15a against the end face 11c.
The second distal end 15c, which is the distal end of each second protrusion 15b, is inserted into the groove 8a. Further, each second tip 15c is in contact with the bottom surface of the groove 8a.
Each second protrusion 15b is elastically deformed when the second end plate 15 is attached to the rotor shaft 8. Further, when the second tip 15c is inserted into the groove 8a, each second protrusion 15b is restored. Therefore, after the rotor 5 is assembled, each second protrusion 15b contacts the end face 11c together with the second plate main portion 15 a.
In such a rotary electric machine and the rotor 5 thereof, a pair of grooves 8a are provided in the rotor shaft 8. Further, each of the first end plates 14 has a plurality of first protrusions 14b. Further, each first front end 14c is inserted into the groove 8a. Each first projection 14b is elastically deformed in a direction in which the first tip 14c approaches the end face 11c. Thereby, the first plate main portion 14a is pressed in a direction contacting the end surface 11c by the restoring force of each of the plurality of first protruding portions 14b.
Therefore, by passing the rotor shaft 8 through each first end plate 14 and elastically deforming each first protrusion 14b to be inserted into the groove 8a, each first end plate 14 can be easily attached to the rotor shaft 8, and deterioration in assembling workability can be suppressed.
Further, by attaching each first end plate 14 to the rotor shaft 8, the rotor core 11 can be easily positioned.
Further, the plurality of first protrusions 14b are elastically deformed, whereby the lamination tolerance of the rotor core 11 can be absorbed. Further, the plurality of permanent magnets 12 can be more reliably prevented from coming off the plurality of magnet insertion holes 11b.
Further, by providing only the pair of grooves 8a in the rotor shaft 8, the end plate bodies 13 can be easily arranged on both sides of the rotor core 11.
Further, the second end plate 15 is interposed between the end face 11c and the first end plate 14. Therefore, the thickness dimension of the first end plate 14 and the thickness dimension of the second end plate 15 can be reduced, respectively, and the end plate body 13 can be more easily attached to the rotor shaft 8.
Further, the plurality of second protrusions 15b are respectively in contact with the end face 11c. Therefore, the rotor core 11 can be positioned more stably with respect to the rotor shaft 8.
In the structure in which the rotor core 11 is sandwiched between the pair of end plate bodies 13, the plurality of caulking portions 11d may be omitted.
Further, two or more first end plates 14 may be used for one end plate body 13.
In addition, two or more second end plates 15 may be used for one end plate body 13.
In addition, each of the second protruding portions 15b may be deformed in a direction in which the second tip 15c is away from the end face 11c in a state where the second plate main portion 15a is in contact with the end face 11c.
In addition, the second end plate 15 may be omitted. That is, the end plate body 13 may be constituted by only the first end plate 14.
Further, the grooves 8a may be intermittently provided along the circumferential direction of the rotor shaft 8.
The end plate body 13 of embodiment 1 may be applied to only one end of the rotor core 11 in the axial direction of the rotor shaft 8.
Claims (4)
1. A rotor of a rotating electrical machine is provided with:
a rotor core provided with a magnet insertion hole and a shaft insertion hole;
a permanent magnet inserted into the magnet insertion hole;
a rotor shaft inserted into the shaft insertion hole; and
an end plate body that abuts against an end surface of the rotor core in an axial direction of the rotor shaft, prevents the permanent magnet from coming off the magnet insertion hole,
a groove is provided on the outer peripheral surface of the rotor shaft along the circumferential direction of the rotor shaft,
the end plate body is provided with a first end plate,
the first end plate has:
an annular first plate main portion; and
a plurality of first protruding portions protruding from the first plate main portion toward an inner side of the first plate main portion,
a first front end as a front end of each of the first protrusions is inserted into the groove,
each of the first protrusions is elastically deformed in a direction in which the first front end approaches the end face,
the first plate main portion is pressed in a direction contacting the end surface by a restoring force of each of the plurality of first protruding portions.
2. The rotor of a rotary electric machine according to claim 1, wherein,
the end plate body also has a second end plate interposed between the end face and the first end plate,
the second end plate has:
an annular second plate main portion; and
a plurality of second protruding portions protruding from the second plate main portion toward the inside of the second plate main portion, respectively,
a second front end, which is a front end of each of the second protrusions, is inserted into the groove.
3. The rotor of a rotary electric machine according to claim 2, wherein,
each of the second protrusions is in contact with the end surface.
4. A rotary electric machine provided with the rotor according to any one of claims 1 to 3.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022-071352 | 2022-04-25 | ||
| JP2022071352A JP7204027B1 (en) | 2022-04-25 | 2022-04-25 | Rotating electric machine and its rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116995832A true CN116995832A (en) | 2023-11-03 |
Family
ID=84888498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210915630.6A Pending CN116995832A (en) | 2022-04-25 | 2022-08-01 | Rotary electric machine and rotor thereof |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP7204027B1 (en) |
| CN (1) | CN116995832A (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008178253A (en) | 2007-01-19 | 2008-07-31 | Fanuc Ltd | Method of manufacturing rotor of electric motor, and the electric motor |
| JP5560917B2 (en) | 2010-06-03 | 2014-07-30 | トヨタ自動車株式会社 | Manufacturing method of rotor for rotating electrical machine and shaft material for rotating electrical machine |
| JP6801282B2 (en) * | 2016-08-01 | 2020-12-16 | トヨタ自動車株式会社 | Rotating electric rotor |
| JP2019134565A (en) | 2018-01-30 | 2019-08-08 | 本田技研工業株式会社 | Rotor of rotary electric machine |
| JP7123261B2 (en) | 2019-07-11 | 2022-08-22 | 三菱電機株式会社 | Rotor for rotary electric machine and manufacturing method thereof |
-
2022
- 2022-04-25 JP JP2022071352A patent/JP7204027B1/en active Active
- 2022-08-01 CN CN202210915630.6A patent/CN116995832A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP7204027B1 (en) | 2023-01-13 |
| JP2023161169A (en) | 2023-11-07 |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |