CN109728667B - Rotor structure and motor with same - Google Patents
Rotor structure and motor with same Download PDFInfo
- Publication number
- CN109728667B CN109728667B CN201910199241.6A CN201910199241A CN109728667B CN 109728667 B CN109728667 B CN 109728667B CN 201910199241 A CN201910199241 A CN 201910199241A CN 109728667 B CN109728667 B CN 109728667B
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- rotor
- rotor core
- rotor structure
- locking piece
- locking member
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- 238000004519 manufacturing process Methods 0.000 abstract description 14
- 239000003292 glue Substances 0.000 abstract description 9
- 238000012423 maintenance Methods 0.000 abstract description 3
- 239000006223 plastic coating Substances 0.000 description 7
- 230000005389 magnetism Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 230000005415 magnetization Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention provides a rotor structure and a motor with the same. The rotor structure includes: a rotor core; the permanent magnets are arranged in a plurality, and the permanent magnets are inserted into the rotor core at intervals along the circumferential direction of the rotor core; the locking assembly comprises a first locking piece and a second locking piece which are matched with each other, the first locking piece and the second locking piece are respectively positioned at two ends of the rotor core, and part of the first locking piece penetrates through the rotor core to be connected with the second locking piece so as to fasten the permanent magnet in the rotor core. The invention solves the problems of low reliability and complex production process of the rotor structure caused by adopting glue to fix the permanent magnet in the prior art, and the rotor structure has the advantages of simple production process, convenient reworking and maintenance, high production efficiency and low production cost.
Description
Technical Field
The invention relates to the technical field of motor equipment, in particular to a rotor structure and a motor with the same.
Background
Permanent magnet synchronous motors are mainly classified into surface-mounted type and embedded type according to the arrangement mode of permanent magnets on a rotor. The surface-mounted type rotor is characterized in that the permanent magnet is attached to the surface of the rotor, and the structure is relatively simple; the embedded permanent magnet is embedded into the rotor core, the structure is more compact, the polar arc coefficient is easy to control, and each pole can provide larger magnetic flux.
The permanent magnet is embedded in the rotor core and is usually fixed by glue or adopts a plastic coating structure, so that the rotor magnetization becomes a bottleneck problem when the number of poles of the rotor of the embedded permanent magnet motor is more, the rotor cannot be coated with plastic after magnetization, only the permanent magnet can be fixed by glue with magnetic flux, the glue fixing reliability is low, and the production process is complex.
Disclosure of Invention
The invention mainly aims to provide a rotor structure and a motor with the same, so as to solve the problem of low reliability of an embedded rotor structure in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided a rotor structure comprising: a rotor core; the permanent magnets are arranged in a plurality, and the permanent magnets are inserted into the rotor core at intervals along the circumferential direction of the rotor core; the locking assembly comprises a first locking piece and a second locking piece which are matched with each other, the first locking piece and the second locking piece are respectively positioned at two ends of the rotor core, and part of the first locking piece penetrates through the rotor core to be connected with the second locking piece so as to fasten the permanent magnet in the rotor core.
Further, the first locking member is detachably connected with the second locking member.
Further, the first locking member includes: a limiting plate; the first end of spliced pole is connected with the limiting plate, and the first end of spliced pole wears out in the rotor core and is connected with the second retaining member.
Further, the outer surface of the second end of the connecting post is provided with external threads.
Further, the middle part of second retaining member is provided with the first through-hole that supplies the pivot to pass, is provided with the internal thread that cooperatees with the external screw thread on the pore wall of first through-hole.
Further, the second through holes through which the rotating shafts pass are formed in the middle of the limiting plate, the connecting columns are multiple, the connecting columns are arranged at intervals along the circumference of the second through holes, and external threads are arranged on the outer surfaces of the second ends of the connecting columns.
Further, the middle part of rotor core is provided with the third through-hole that supplies the pivot to pass, and rotor core's periphery along the third through-hole is provided with the fourth through-hole that supplies the spliced pole to pass.
Further, the limiting plate is of an annular structure, and the first end of the connecting column is connected with the surface of the limiting plate, which faces one side of the rotor core.
Further, the second locking member is an annular plate-shaped structure.
Further, the number of poles of the rotor structure is 12 poles.
Further, the permanent magnet is a permanent magnet with magnetism when inserted into the rotor core.
According to another aspect of the invention there is provided an electrical machine comprising a rotor structure as described above.
By applying the technical scheme of the invention, the permanent magnets are inserted into the rotor core to enable the rotor structure to form an embedded rotor structure, and the permanent magnets are fixed at the two ends of the rotor structure through the locking assemblies, so that the rotor structure of the structure is simple to install and reliable to fix.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
fig. 1 shows a schematic view of an exploded construction of a first embodiment of a rotor construction according to the invention;
fig. 2 shows a schematic view of an exploded construction of a second embodiment of a rotor construction according to the invention;
fig. 3 shows a schematic structural view of a third embodiment of a rotor structure according to the invention;
FIG. 4 shows a schematic cross-sectional view of the A-A direction in FIG. 3;
fig. 5 shows a schematic structural view of a fourth embodiment of a rotor structure according to the invention;
fig. 6 shows a schematic structural view of a fifth embodiment of a rotor structure according to the present invention;
fig. 7 shows a schematic structural view of a sixth embodiment of a rotor structure according to the present invention;
fig. 8 shows a schematic structural view of a seventh embodiment of a rotor structure according to the present invention;
fig. 9 shows a schematic structural view of a first embodiment of a first locking member according to the present invention;
fig. 10 shows a schematic structural view of a second embodiment of a first locking member according to the present invention;
fig. 11 shows a schematic structural view of a third embodiment of the first locking member according to the present invention.
Wherein the above figures include the following reference numerals:
10. a rotor core; 11. a third through hole; 12. a fourth through hole;
20. a permanent magnet;
30. a locking assembly; 31. a first locking member; 311. a limiting plate; 312. a connecting column; 313. a second through hole;
32. a second locking member; 321. a first through hole.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and the accompanying drawings are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art, that in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and that identical reference numerals are used to designate identical devices, and thus descriptions thereof will be omitted.
As shown in connection with fig. 1 to 11, according to an embodiment of the present invention, a rotor structure is provided.
Specifically, as shown in fig. 1, the rotor structure includes a rotor core 10, permanent magnets 20, and a locking assembly 30. The plurality of permanent magnets 20 are provided, and the plurality of permanent magnets 20 are inserted into the rotor core 10 at intervals in the circumferential direction of the rotor core 10. The locking assembly 30 includes a first locking member 31 and a second locking member 32 which are engaged with each other, the first locking member 31 and the second locking member 32 being respectively located at both ends of the rotor core 10, wherein a portion of the first locking member 31 passes through from inside the rotor core 10 to be coupled with the second locking member 32 to fasten the permanent magnet 20 inside the rotor core 10.
In the embodiment, the permanent magnets are inserted into the rotor core to enable the rotor structure to form an embedded rotor structure, and the permanent magnets are fixed at two ends of the rotor structure through the locking assemblies, so that the rotor structure of the rotor structure is simple to install and reliable to fix.
Wherein the first locking member 31 is detachably connected with the second locking member 32. The arrangement can prevent other components from being damaged when the rotor structure is disassembled and maintained, so that the locking assembly of the rotor structure can be reused, and the maintenance cost of the rotor structure is reduced.
Further, as shown in fig. 2 to 4, the first locker 31 includes a stopper plate 311 and a connection post 312. The first end of the connecting post 312 is connected to the limiting plate 311, and the first end of the connecting post 312 penetrates out of the rotor core 10 to be connected to the second locking member 32. This arrangement effectively improves the stability of the permanent magnets and the rotor core.
Specifically, as shown in fig. 9 and 10, the outer surface of the second end of the connecting post 312 is provided with external threads (as shown at a in fig. 1). As shown in fig. 4 and 8, a first through hole 321 through which the rotation shaft passes is provided in the middle of the second locking member 32, and an internal thread (shown as B in fig. 1) that mates with the external thread is provided on the wall of the first through hole 321. The arrangement can further improve connection reliability between the locking components, and simultaneously the permanent magnet can be fastened by only rotating the second locking piece when the second locking piece is assembled, so that the fastening mode is simple and reliable to operate.
Further, the middle part of the limiting plate 311 is provided with a plurality of second through holes 313 through which the rotating shaft passes, the plurality of connecting columns 312 are arranged at intervals along the circumferential direction of the second through holes 313, and the outer surface of the second end of each connecting column 312 is provided with external threads. This arrangement can make the connecting post 312 uniformly stressed, and improve the connection reliability of the first locking member.
As shown in fig. 3, the rotor core 10 is provided at a central portion thereof with a third through hole 11 through which the rotation shaft passes, and the rotor core 10 is provided at an outer periphery thereof along the third through hole 11 with a fourth through hole 12 through which the connection post 312 passes. This arrangement enables each of the connecting posts 312 to correspond to one of the fourth through holes 12, further improving the connection reliability of the locking assembly.
Preferably, the limiting plate 311 has an annular structure, and a first end of the connecting post 312 is connected to a surface of the limiting plate 311 facing the side of the rotor core 10. The second locking member 32 is of annular plate-like configuration. The limiting plate 311 and the second locking piece can be contacted with each permanent magnet through the arrangement, so that the purpose of fastening and limiting is achieved.
Further, the number of poles of the rotor structure is 12 poles. This arrangement can effectively improve the performance of the rotor structure. The permanent magnet 20 is a permanent magnet with magnetism when inserted into the rotor core 10.
The rotor structure of the above embodiment may also be used in the technical field of motor devices, and according to another aspect of the present invention, there is provided a motor including a rotor structure including the rotor structure of the above embodiment.
Specifically, by adopting the rotor structure, the problem that the production process of fixing the permanent magnets of the embedded rotor by using glue is complex is solved, and the problem that the permanent magnets are difficult to fix when the number of poles of the motor rotor is more is solved.
The embedded rotor structure of this application, through two limiting plates fixed permanent magnet, one of them limiting plate adopts the helicitic texture, and the installation is simple, and fixed reliable, the permanent magnet can take magnetism to embed rotor core in the multipolar time of motor rotor, and is fixed through the limiting plate, solves and takes magnetism unable package to mould the problem, solves the problem that glue fixed reliability is low and production technology is complicated, adopts the embedded rotor structure production technology of this application simple, and the maintenance of doing over again is convenient, realizes production high efficiency, low cost function.
As shown in fig. 1, the number of poles of the rotor structure is 12, and in the rotor structure in the prior art, because the number of magnetic poles is more, magnetization becomes a bottleneck problem, magnetization cannot be saturated, only the magnet can be inserted into a rotor core, however, plastic coating of the magnet-carrying rotor also becomes a bottleneck, the magnet-carrying rotor cannot be coated with plastic, the permanent magnet can be fixed only through glue, the permanent magnet can be fixed through glue during production, the rotor needs to be baked at high temperature and cured for a long time, the long-term reliability of the rotor is low through glue fixation, and the production process is complex. The embedded rotor has a small number of poles, and can adopt a plastic coating structure. The rotor is magnetized after plastic coating, the plastic coating cost is high, the die cost is high, the requirement on the performance of the magnetizer is high in order to meet the magnetizing saturation, the production cost of the motor is improved by adopting a plastic coating structure, and the problems that reworking is difficult after plastic coating cannot be solved.
As shown in fig. 4, the permanent magnet is fixed through the front and rear limiting plates after being inserted into the rotor core through interference fit, the limiting post of one limiting plate penetrates into the rotor core, the inner circle of the other limiting plate is provided with a threaded structure and is fixed with the front limiting plate through threads, and the permanent magnet can be fixed to axially move after the two limiting plates are matched, so that the reliability of the permanent magnet in the rotor core is fixed. Under the condition of multiple poles of the rotor, the magnetic shoe can be inserted into the rotor core with magnetism and then fixed through the front limiting plate and the rear limiting plate, so that the problem that the embedded rotor is difficult to fix after magnetizing is solved. Fig. 1 and fig. 2 are three-dimensional explosion views of the embedded rotor structure, and the front and rear limiting plates, namely the locking assembly, are fixed through threads. The embedded rotor structure can reduce the mold opening cost of the rotor plastic-covered mold, reduce the production cost of a motor, solve the problem of difficult permanent magnet fixation and improve the production efficiency of the rotor structure. As shown in fig. 10 and 11, 6 limit posts are uniformly arranged.
In addition to the foregoing, references in the specification to "one embodiment," "another embodiment," "an embodiment," etc., mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described in general terms in the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is intended that such feature, structure, or characteristic be implemented within the scope of the invention.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A rotor structure, comprising:
a rotor core (10);
a plurality of permanent magnets (20), wherein the plurality of permanent magnets (20) are inserted into the rotor core (10) at intervals along the circumferential direction of the rotor core (10);
-a locking assembly (30), the locking assembly (30) comprising a first locking member (31) and a second locking member (32) cooperating with each other, the first locking member (31) and the second locking member (32) being located at two ends of the rotor core (10), respectively, wherein a part of the first locking member (31) passes from within the rotor core (10) to connect with the second locking member (32) for fastening the permanent magnet (20) within the rotor core (10);
the first locking piece (31) is detachably connected with the second locking piece (32);
the first locking piece (31) comprises a limiting plate (311) and a connecting column (312), a first end of the connecting column (312) is connected with the limiting plate (311), and a first end of the connecting column (312) penetrates out of the rotor core (10) to be connected with the second locking piece (32);
the outer surface of the second end of the connecting column (312) is provided with external threads, a first through hole (321) for a rotating shaft to pass through is formed in the middle of the second locking piece (32), and an internal thread matched with the external threads is formed in the hole wall of the first through hole (321).
2. The rotor structure according to claim 1, wherein a second through hole (313) through which the rotating shaft passes is formed in the middle of the limiting plate (311), the connecting columns (312) are plural, the connecting columns (312) are arranged at intervals along the circumferential direction of the second through hole (313), and external threads are formed on the outer surface of the second end of each connecting column (312).
3. The rotor structure according to claim 1, characterized in that a third through hole (11) through which a rotating shaft passes is provided in a middle portion of the rotor core (10), and a fourth through hole (12) through which the connecting post (312) passes is provided along an outer periphery of the third through hole (11) of the rotor core (10).
4. The rotor structure according to claim 1, characterized in that the limiting plate (311) is of an annular structure, and the first end of the connecting post (312) is connected to a surface of the limiting plate (311) facing the side of the rotor core (10).
5. The rotor structure according to claim 4, characterized in that the second locking member (32) is an annular plate-like structure.
6. The rotor structure of claim 1, wherein the number of poles of the rotor structure is 12 poles.
7. The rotor structure according to any one of claims 1 to 6, characterized in that the permanent magnets (20) are magnetic permanent magnets when inserted into the rotor core (10).
8. An electric machine comprising a rotor structure, characterized in that the rotor structure comprises a rotor structure according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910199241.6A CN109728667B (en) | 2019-03-15 | 2019-03-15 | Rotor structure and motor with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910199241.6A CN109728667B (en) | 2019-03-15 | 2019-03-15 | Rotor structure and motor with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109728667A CN109728667A (en) | 2019-05-07 |
| CN109728667B true CN109728667B (en) | 2024-04-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910199241.6A Active CN109728667B (en) | 2019-03-15 | 2019-03-15 | Rotor structure and motor with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109728667B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007295714A (en) * | 2006-04-25 | 2007-11-08 | Matsushita Electric Ind Co Ltd | Enclosed electric compressor |
| CN102570665A (en) * | 2012-01-22 | 2012-07-11 | 浙江大学 | Rotor structure of radial permanent magnet synchronous motor |
| JP2016093015A (en) * | 2014-11-06 | 2016-05-23 | トヨタ自動車株式会社 | Rotor for dynamo electric motor |
| CN207612138U (en) * | 2017-12-29 | 2018-07-13 | 成都银河磁体股份有限公司 | Has female injection molded magnets rotor assembly |
| CN209419337U (en) * | 2019-03-15 | 2019-09-20 | 珠海格力电器股份有限公司 | Rotor structure and motor with same |
-
2019
- 2019-03-15 CN CN201910199241.6A patent/CN109728667B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007295714A (en) * | 2006-04-25 | 2007-11-08 | Matsushita Electric Ind Co Ltd | Enclosed electric compressor |
| CN102570665A (en) * | 2012-01-22 | 2012-07-11 | 浙江大学 | Rotor structure of radial permanent magnet synchronous motor |
| JP2016093015A (en) * | 2014-11-06 | 2016-05-23 | トヨタ自動車株式会社 | Rotor for dynamo electric motor |
| CN207612138U (en) * | 2017-12-29 | 2018-07-13 | 成都银河磁体股份有限公司 | Has female injection molded magnets rotor assembly |
| CN209419337U (en) * | 2019-03-15 | 2019-09-20 | 珠海格力电器股份有限公司 | Rotor structure and motor with same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109728667A (en) | 2019-05-07 |
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