CN220043082U - Rotor assembly and motor rotor - Google Patents
Rotor assembly and motor rotor Download PDFInfo
- Publication number
- CN220043082U CN220043082U CN202321492794.9U CN202321492794U CN220043082U CN 220043082 U CN220043082 U CN 220043082U CN 202321492794 U CN202321492794 U CN 202321492794U CN 220043082 U CN220043082 U CN 220043082U
- Authority
- CN
- China
- Prior art keywords
- rotor
- assembly
- holes
- hole
- positioning
- 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.)
- Active
Links
- 238000004080 punching Methods 0.000 claims abstract description 69
- 238000003860 storage Methods 0.000 abstract description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Manufacture Of Motors, Generators (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The utility model provides a rotor assembly and a motor rotor. The rotor assembly comprises a plurality of rotor punching sheet groups, a plurality of permanent magnets and a plurality of positioning pins. The rotor sheet set includes a plurality of stacked rotor sheets. The rotor punching sheet is provided with a storage groove, an assembly hole and a storage hole. The permanent magnet is accommodated in the accommodating groove. The diameter of the accommodating hole is larger than that of the assembling hole. The locating pin comprises a base and a first locating part and a second locating part which are positioned at two ends of the base. The diameters of the first positioning part and the second positioning part are larger than the diameter of the base part and larger than the diameter of the assembly hole. After the rotor punching sheet groups are stacked, the assembly holes and the accommodating holes are arranged at intervals along the axial direction of the rotor assembly. The base is accommodated in one assembly hole, and the first positioning part and the second positioning part are respectively accommodated in a pair of accommodating holes positioned on two opposite sides of the assembly hole. The plurality of rotor punching sheets of the rotor punching sheet group are fixed through the locating pins, so that the holding force between the rotor punching sheets is increased, and the structural strength of the rotor assembly is better.
Description
Technical Field
The utility model relates to the field of motors, in particular to a rotor assembly and a motor rotor.
Background
The rotor assembly of an electric machine includes a plurality of rotor laminations stacked together and permanent magnets assembled to the rotor laminations. The rotor punching sheet of the existing rotor assembly is fixed in a welding or gluing or self-buckling mode. With the design requirements of high power density and high efficiency of new energy motors, the speed of the motor is increased, the control frequency is increased, and rotor punching sheets are thinner and thinner. The existing fixing mode of the rotor punching sheet can not ensure the structural strength of the rotor assembly.
Disclosure of Invention
The utility model provides a rotor assembly with better structural strength and a motor rotor.
The utility model provides a rotor assembly, which comprises a plurality of rotor punching sheet groups, a plurality of permanent magnets and a plurality of positioning pins, wherein the rotor punching sheet groups are stacked together along the axial direction of the rotor assembly, the rotor punching sheets respectively comprise a plurality of rotor punching sheets stacked together, the rotor punching sheets are provided with containing grooves, containing holes and containing holes, the permanent magnets are contained in the containing grooves, the diameter of the containing holes is larger than that of the containing holes, the positioning pins comprise a base part, a first positioning part and a second positioning part which are positioned at two ends of the base part, the diameter of the first positioning part and the diameter of the second positioning part are larger than that of the base part and larger than that of the containing holes, after the rotor punching sheet groups are stacked, the assembling holes and the containing holes are distributed at intervals along the axial direction of the rotor assembly, the base part of the positioning pins is contained in one containing hole, the first positioning part and the second positioning part are respectively contained in the containing holes, and the first positioning part and the second positioning part are respectively located at two opposite sides of the containing holes.
Further, the thickness of the rotor punching sheet group after being overlapped is equal to the length of the base.
Further, the first positioning portion and/or the second positioning portion are in interference fit with the accommodating hole.
Further, the central axis of the assembly hole of the rotor punching group is deviated with respect to the central axis of the rotor punching group.
Further, the rotor punching sheet set is provided with a plurality of assembling holes and a plurality of accommodating holes, the assembling holes and the accommodating holes are distributed at intervals along the circumferential direction of the rotor punching sheet set, and the assembling holes are all inclined relative to the central axis of the rotor punching sheet set and have the same inclination direction.
Further, the assembly holes of at least one pair of the rotor punching groups are not inclined at the same angle relative to the central axis of the rotor punching group.
Further, the assembly holes of the plurality of rotor punching sheet groups of the rotor assembly are all different in deflection angle relative to the central axis of the rotor punching sheet group.
Further, the edges of the rotor punching sheet groups are provided with skew marking parts for marking skew of the rotor punching sheet groups.
Further, the first positioning portion and/or the second positioning portion is/are stamped and formed by the positioning pin.
The embodiment of the utility model also provides a motor rotor which comprises a shaft part and the rotor assembly, wherein the rotor punching sheets are respectively provided with shaft holes, and the shaft part is accommodated in the shaft holes which are communicated in sequence.
The rotor punching sheets of the rotor punching sheet group are fixed through the positioning pins, so that the holding force between the rotor punching sheets is increased, and the structural strength of the rotor punching sheet group and the rotor assembly is better; meanwhile, after a plurality of rotor punching sheet groups are stacked, a plurality of assembly holes and a plurality of containing holes are distributed at intervals along the axial direction of the rotor assembly, the base part of the locating pin is contained in one assembly hole, the first locating part of the locating pin is contained in one containing hole positioned at one side of the assembly hole, the second locating part of the locating pin is contained in the other containing hole positioned at the other side of the assembly hole, the locating pin is convenient to assemble, and skew of the rotor punching sheet groups of different layers is also convenient to realize through the assembly holes arranged in a skewed mode, so that electromagnetic noise of a motor is reduced.
Drawings
FIG. 1 is a schematic illustration of a motor rotor according to an exemplary embodiment of the present utility model;
FIG. 2 is a front view of the motor rotor shown in FIG. 1;
FIG. 3 is an exploded view of the motor rotor shown in FIG. 1;
FIG. 4 is a schematic cross-sectional view of the motor rotor shown in FIG. 1;
FIG. 5 is another cross-sectional schematic view of the motor rotor shown in FIG. 1;
FIG. 6 is a schematic view of one rotor punching set of FIG. 3 prior to assembly with permanent magnets and locating pins;
FIG. 7 is a schematic view of the rotor punching set of FIG. 6 assembled with permanent magnets and locating pins;
FIG. 8 is a schematic cross-sectional view of the rotor punching set and locating pins of FIG. 7 assembled;
FIG. 9 is a top view of one of the rotor punching groups shown in FIG. 3;
FIG. 10 is a top view of another rotor sheet set shown in FIG. 3;
fig. 11 is a top view of yet another rotor sheet set shown in fig. 3.
Reference numerals illustrate: a shaft portion 1; a resisting part 11; a rotor assembly, 2; rotor punching group, 21; first shaft holes 210; rotor punching, 211; a storage groove 212; a first receiving groove 2121; a second receiving groove 2122; an assembly hole 213; a receiving hole 214; a skew flag 215; permanent magnets, 22; a positioning pin 23; a base 231; a first positioning portion 232; a second positioning portion 233; a locking ring (3); balance plate, 4; a second shaft hole 40; limiting holes, 41.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present utility model. Rather, they are merely examples of apparatus consistent with aspects of the utility model as detailed in the accompanying claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "plurality" means two or more. Unless otherwise indicated, the terms "front," "rear," "lower," and/or "upper" and the like are merely for convenience of description and are not limited to one location or one spatial orientation. The word "comprising" or "comprises", and the like, means that elements or items appearing before "comprising" or "comprising" are encompassed by the element or item recited after "comprising" or "comprising" and equivalents thereof, and that other elements or items are not excluded. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
Referring to fig. 1 to 3, the motor rotor of the embodiment of the present utility model includes a shaft portion 1 and a rotor assembly 2 fixed to the shaft portion 1, a lock ring 3, and a pair of balance plates 4. The rotor assembly 2 is located between a pair of balance plates 4, and the lock ring 3 is located outside one balance plate 4. The rotor assembly 2 is provided with a first shaft hole 210, the balance plate 4 is provided with a second shaft hole 40, the shaft portion 1 is assembled into the first shaft hole 210 and the second shaft hole 40, and the lock ring 3 is fixed to the shaft portion 1 to fix the rotor assembly 2 and the balance plate 4 to the shaft portion 1. The balance plate 4 is made of metal, such as aluminum.
Referring to fig. 4 to 8, the rotor assembly 2 of the present utility model includes a plurality of rotor sheet groups 21, a plurality of permanent magnets 22, and a plurality of positioning pins 23. A plurality of rotor sheet groups 21 are stacked together in the axial direction of the rotor assembly. The plurality of rotor sheet groups 21 each include a plurality of rotor sheets 211 stacked together. The rotor punching 211 is provided with a receiving groove 212, an assembly hole 213, and a receiving hole 214. The permanent magnet 22 is accommodated in the accommodation groove 212. The diameter of the receiving hole 214 is larger than the diameter of the assembly hole 213. The positioning pin 23 includes a base 231, and a first positioning portion 232 and a second positioning portion 233 at two ends of the base 231. The diameters of the first positioning portion 232 and the second positioning portion 233 are larger than the diameter of the base 231 and larger than the diameter of the assembly hole 213. After stacking the plurality of rotor punching groups 21, the plurality of assembly holes 213 and the plurality of receiving holes 214 are arranged at intervals along the axial direction of the rotor assembly 2. The base 231 of the positioning pin 23 is accommodated in one assembly hole 213, the first positioning portion 232 and the second positioning portion 233 of the positioning pin are respectively accommodated in a pair of accommodating holes 214, and the pair of accommodating holes 214 are respectively positioned at two opposite sides of the assembly hole 213 so as to fix the plurality of rotor punching pieces 211 together.
The plurality of rotor punching sheets 211 of the rotor punching sheet group 21 are fixed through the positioning pins 23, so that the holding force between the rotor punching sheets 211 is increased, and the structural strength of the rotor punching sheet group 21 and the rotor assembly 2 is better; meanwhile, after stacking the plurality of rotor punching groups 21, the plurality of assembly holes 213 and the plurality of receiving holes 214 are arranged at intervals along the axial direction of the rotor assembly 2, the base 231 of the positioning pin 23 is received in one assembly hole 213, the first positioning portion 232 and the second positioning portion 233 of the positioning pin are respectively received in a pair of receiving holes 214, and the pair of receiving holes 214 are respectively located at two opposite sides of the assembly hole 213, so that the positioning pin is convenient to assemble, and skew of the rotor punching groups 21 of different layers can be conveniently realized through the obliquely arranged assembly holes 213.
The plurality of rotor blade groups 21 are each provided with a first shaft hole 210, and the shaft portion 1 is accommodated in the plurality of first shaft holes 210 which are sequentially communicated.
Alternatively, the first positioning portion 232 and/or the second positioning portion 233 are stamped and formed from the positioning pin 23. The first positioning portion 232 and/or the second positioning portion 233 are in interference fit with the accommodating hole 214, and the plurality of rotor punching pieces 211 do not need to be additionally fixed, so that assembly efficiency is improved. In one rotor sheet set 21, the thickness of the plurality of rotor sheets 211 after being stacked is equal to the length of the base 231, so that the positioning pins 23 provide a pre-tightening force for the plurality of rotor sheets 211.
The pair of balance plates 4 are respectively provided with a limiting hole 41 for respectively receiving the first positioning portion 232 or the second positioning portion 233 of the positioning pin 23 of the outermost pair of rotor sheet groups 21.
The plurality of permanent magnets 22 are arranged in a plurality of layers, and the plurality of layers of permanent magnets 22 are respectively accommodated in the plurality of rotor punching groups 21. The permanent magnet 22 may be fixed by an injection molded article flowing into the receiving groove 212, or may be fixed by gluing, or may be fixed by a holding force of a positioning projection.
The receiving groove 212 includes a pair of first receiving grooves 2121 and a pair of second receiving grooves 2122. A pair of first receiving grooves 2121 and a pair of second receiving grooves 2122 each have a permanent magnet 22 assembled therein. The pair of first receiving grooves 2121 may be disconnected to increase the strength of the rotor sheet 211 or may be connected to prevent leakage of magnetic flux. The pair of second receiving grooves 2122 may be disconnected to increase the strength of the rotor sheet 211 or may be connected to prevent leakage of magnetic flux. A pair of first receiving grooves 2121 and/or a pair of second receiving grooves 2122 may penetrate the edge of the rotor sheet 211 to reduce magnetic leakage.
The central axis of the assembly hole 213 of the rotor punching group 21 is deviated relative to the central axis of the rotor punching group 21, and after the rotor assembly 2 is assembled, the permanent magnets 22 on the rotor punching groups 21 of different layers are arranged in a deviated manner, so that the electromagnetic noise of the motor is reduced.
The rotor punching set 21 is provided with a plurality of assembling holes 213 and a plurality of accommodating holes 214 to increase the stability of the plurality of rotor punching pieces 211 of the rotor punching set 21. The plurality of assembly holes 213 and the plurality of receiving holes 214 are spaced apart in the circumferential direction of the rotor punching group 21. The plurality of assembly holes 213 are each inclined with respect to the central axis of the rotor sheet set 21 and have the same inclination direction, and the rotor sheet 211 is uniformly stressed in the circumferential direction thereof.
Referring to fig. 2 and 9 to 11, the distances between the centers of the plurality of assembly holes 213 and the centers of the plurality of receiving holes 214 and the center of the rotor sheet set 21 are equal. The assembly holes 213 of at least one pair of rotor sheet sets 21 are skewed at different angles with respect to the central axis of the rotor sheet set 21 to achieve skew of the rotor sheet sets 21 of different layers. Alternatively, the angles of deflection of the assembly holes 213 of all rotor sheet sets 21 with respect to the central axis of the rotor sheet set 21 are different to achieve skew of all rotor sheet sets 21. The angle at which the assembly holes 213 of the rotor sheet set 21 in fig. 9 to 11 are skewed with respect to the central axis of the rotor sheet set 21 gradually increases.
The angle at which the assembly hole 213 of each rotor sheet set 21 is deviated with respect to the central axis of the rotor sheet set 21 may be set according to actual needs, and the present utility model is not limited to the angle.
The edges of the rotor punching groups 21 are provided with skew marking portions 215 for marking skew of the rotor punching groups 21, so that the assembling efficiency of the rotor assembly 2 can be increased when the rotor assembly 2 is assembled.
Alternatively, the skew marking 215 is a groove or a rib or a marking line, or the like.
The number of assembly holes 213 of the same rotor sheet group 21 is the same as the number of receiving holes 214.
When the rotor assembly 2 is assembled, the rotor punching sheets 211 stacked together in multiple layers are riveted and fixed through the positioning pins 23, and the first positioning part 232 and the second positioning part 233 of the positioning pins 23 are exposed at two opposite sides of the rotor punching sheet group 21; then, the permanent magnets 22 are assembled and fixed to the rotor sheet set 21; then, the two rotor sheet groups 21 are fixed, the first positioning portion 232 of the positioning pin 23 of the lower rotor sheet group 21 is accommodated in the accommodating hole 214 of the upper rotor sheet group 21, and the second positioning portion 233 of the positioning pin 23 of the upper rotor sheet group 21 is accommodated in the accommodating hole 214 of the lower rotor sheet group 21, so that the fixation of the two rotor sheet groups 21 is realized, and the plurality of rotor sheet groups 21 are sequentially fixed.
When the motor rotor is assembled, one balance plate 4 is assembled to the shaft portion 1, the resisting portion 11 of the shaft portion 1 supports the balance plate 4 from below, the rotor assembly 2 is sleeved to the shaft portion 1 and is pressed to the balance plate 4, the other balance plate 4 is assembled to the shaft portion 1 and is pressed to the rotor assembly 2, the lock ring 3 is assembled to the shaft portion 1 and is pressed to the balance plate 4, and the lock ring 3 is fixed with the shaft portion 1 to fix the rotor assembly 2 to the shaft portion 1.
The present utility model is not limited to the above-mentioned embodiments, but is not limited to the above-mentioned embodiments, and any person skilled in the art can make some changes or modifications to the above-mentioned embodiments without departing from the scope of the present utility model.
Claims (10)
1. The rotor assembly is characterized by comprising a plurality of rotor punching sheet groups, a plurality of permanent magnets and a plurality of positioning pins, wherein the rotor punching sheet groups are stacked together along the axial direction of the rotor assembly, the rotor punching sheets respectively comprise a plurality of rotor punching sheets stacked together, a containing groove, a containing hole and a containing hole are formed in the rotor punching sheets, the permanent magnets are contained in the containing groove, the diameter of the containing hole is larger than that of the containing hole, the positioning pins comprise a base part, a first positioning part and a second positioning part which are positioned at two ends of the base part, the diameter of the first positioning part and the diameter of the second positioning part are larger than that of the base part and larger than that of the containing hole, after the rotor punching sheet groups are stacked, the containing holes and the containing holes are distributed at intervals along the axial direction of the rotor assembly, the base part of the positioning pins is contained in one containing hole, the first positioning part and the second positioning part are respectively contained in the containing holes, and the first positioning part and the second positioning part are respectively located at two opposite sides of the containing holes.
2. The rotor assembly of claim 1 wherein the plurality of rotor sheets of the rotor sheet set are stacked to have a thickness equal to the length of the base.
3. The rotor assembly of claim 1, wherein the first and/or second locating portions are interference fit with the receiving aperture.
4. The rotor assembly of claim 1 wherein the central axis of the assembly hole of the rotor sheet set is skewed with respect to the central axis of the rotor sheet set.
5. The rotor assembly of claim 4, wherein the rotor sheet set is provided with a plurality of the assembly holes and a plurality of the receiving holes, the plurality of the assembly holes and the plurality of the receiving holes are distributed at intervals along the circumferential direction of the rotor sheet set, and the plurality of the assembly holes are all inclined relative to the central axis of the rotor sheet set and have the same inclination direction.
6. The rotor assembly of claim 5 wherein the assembly holes of at least one pair of the rotor plate sets are skewed at different angles relative to the central axis of the rotor plate sets.
7. The rotor assembly of claim 6 wherein the assembly holes of a plurality of the rotor blade sets of the rotor assembly are each skewed at a different angle relative to a central axis of the rotor blade sets.
8. The rotor assembly of claim 6 wherein the edges of a plurality of the rotor sheet sets are each provided with a skew marking to mark skew of the rotor sheet sets.
9. The rotor assembly of any one of claims 1 to 8, wherein the first and/or second locating portions are stamped from the locating pin.
10. A motor rotor comprising a shaft portion and a rotor assembly according to any one of claims 1 to 9, wherein a plurality of said rotor punching sheets are respectively provided with a first shaft hole, and said shaft portion is accommodated in a plurality of said first shaft holes which are sequentially communicated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321492794.9U CN220043082U (en) | 2023-06-12 | 2023-06-12 | Rotor assembly and motor rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321492794.9U CN220043082U (en) | 2023-06-12 | 2023-06-12 | Rotor assembly and motor rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220043082U true CN220043082U (en) | 2023-11-17 |
Family
ID=88741001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321492794.9U Active CN220043082U (en) | 2023-06-12 | 2023-06-12 | Rotor assembly and motor rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220043082U (en) |
-
2023
- 2023-06-12 CN CN202321492794.9U patent/CN220043082U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| FI117458B (en) | Electric machine rotor | |
| EP2626975A2 (en) | Rotor assembly for motor and manufacturing method thereof | |
| US10651696B2 (en) | Motor rotor | |
| US20110187222A1 (en) | Dual-rotor motor and method of manufacturing the same | |
| US20150229194A1 (en) | Rotor with magnet pattern | |
| US20020067091A1 (en) | Axial flux machine and method of fabrication | |
| EP1923982A2 (en) | Axial air gap type electric motor | |
| US7687959B1 (en) | Brushless a-c motor | |
| CN101663807B (en) | Rotor for rotating machine | |
| CN218829294U (en) | Motor rotor punching sheet, iron core and motor | |
| EP4178094A1 (en) | Stator and rotor structure and axial magnetic field electric motor | |
| CN220043082U (en) | Rotor assembly and motor rotor | |
| CN208571728U (en) | Stator core and rotating electric machine | |
| CN210518073U (en) | Novel high-power-density claw pole permanent magnet motor | |
| CN202309280U (en) | Rotor core assembly | |
| CN210693594U (en) | Rotor core punching sheet, rotor assembly and electronic pump | |
| US20230094808A1 (en) | Large-current and low-voltage servo motor | |
| US9559558B2 (en) | Modular transverse flux electrical machine assembly | |
| US11594923B2 (en) | Rotor and motor including the same | |
| CN220067013U (en) | Rotor assembly and motor rotor | |
| CN219999129U (en) | Rotor assembly and motor rotor | |
| CN116683670A (en) | Rotor assembly and motor rotor | |
| KR101028759B1 (en) | Generator and wind power system using the same | |
| US20230006488A1 (en) | Rotating electrical machine | |
| CN220325359U (en) | Permanent magnet synchronous motor rotor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |